Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T7012-93
Roller Conveyor
Published on September 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1994
Mechanical Industry Standard of the People's Republic of China
Roller Conveyor
1 Subject Content and Scope of Application
JB/T7012-93
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of roller conveyors (hereinafter referred to as conveyors).
This standard applies to cylindrical long conveyors for conveying piece goods. For conveyors with special requirements, their general parts should also be used as a reference.
2 Reference standards
GB1171
GB1244
GB2828
GB3639
GB3768
GB8162
GB8923
GB9286
GB/T13306
GB/T13384
Packaging, storage and transportation pictorial symbols
Ordinary flat belt
Ordinary V-belt
Short pitch precision roller chain for transmission||tt ||Short pitch precision roller chain and bush chain for transmission. Tooth profile and tolerance of sprocket. Batch inspection. Count sampling procedure and sampling table (applicable to inspection of continuous batches). Cold drawn or cold rolled precision seamless steel pipe.|tt||Determination of sound power level of noise source.|tt||Simplified method.
Seamless steel pipe for structure.
Rust grade and rust removal grade of steel surface before painting. Cross-cut test of paint and varnish film.|tt||General technical conditions for packaging of electromechanical products.
Electric welded steel pipe with diameter of 5~152mm.
Conveyor types are classified according to transmission mode as specified in Table 1. Approved by the Ministry of Machinery Industry on September 21, 1993
Implemented on July 1, 1994
Non-powered
Screw conveyor
Single chain drive
Screw conveyor
Double chain drive
Screw conveyor
JB/T7012-93
Fixed axis type
Fixed axis type
Rotary axis type
Flat belt drive
Screw conveyor
V-belt drive
Roller conveyor
0-belt drive
Screw conveyor
JB/T7012-93
Continued Table 1
3.2 Conveyors are divided into straight sections (Figure 1) and curved sections (Figure 2) according to their layout. The straight and curved sections of the conveyor can be arranged horizontally or inclined.
3.3 Conveyors are divided into fixed-axis type and rotating-axis type according to the support method of the conveyor shaft. 3.4 Model indication method
Sprocket length, mm
Roller diameter, mm
Type code (see Table 1)
Roller conveyor code
Marking example:
Unpowered sprocket conveyor with roller diameter D=50mm and roller length 1=630mm: Sub-conveyor GW50-630-JB/T7012
Flat belt driven sub-conveyor with roller diameter D=108mm and roller length=1250mm: Roller conveyor GP108-1250JB/T7012 Basic parameters
JB/T7012-93
The roller diameter D and the sub-shaft diameter d shall comply with the provisions of Table 2. Table 2
Roller diameter D
Roller shaft diameter
4.2Roller length 1 shall comply with the provisions of Table 3. Roller length
JB/T7012-93
Roller spacing P shall comply with the provisions of Table 4. For double-chain drive conveyors, according to the requirements of chain drive meshing, the roller spacing can adopt the approximate value of Table 4.
Table 4
Roller spacing
The arc radius R on the inner side of the frame of the conveyor curve section shall comply with the provisions of Table 5 (see Figure 2). Table 5
Roller diameter
Circular strength radius R
4.5The center angle 0 of the arc of the conveyor curve section shall comply with the following values (see Figure 2): 30°, 45°,
60°, 90°
4.6The conveyor height H shall comply with the provisions of Figure 3 and Table 6. The conveyor can also be supported directly on the floor by the frame without legs. Figure 3
Conveyor height H
Conveyor straight section length L shall comply with the provisions of Table 7. Straight section length L
The conveying speed√ of the power conveyor shall comply with the provisions of Table 8. Table 8
Conveying speed
0.0500.0630.0800.1000.1250.1600.2000.2500.3150.4000.5000.6300.8001.000
5. Technical requirements
JB/T7012-93
5.1 The conveyor shall comply with the requirements of this standard and shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.2. The conveyor shall be able to operate normally at an ambient temperature of -25 to +40°C. 5.3 Roller
5.3.1· The roller body shall be made of hot-rolled or cold-drawn (rolled) seamless steel pipes of material not less than No. 10 steel in accordance with the requirements of GB8162, cold-drawn or cold-rolled precision seamless steel pipes in accordance with the requirements of GB3639, and electric welded steel pipes in accordance with the requirements of YB242. When there are special requirements, stainless steel, aluminum alloy and synthetic material pipes may also be used. 5.3.2· The outer surface of the roller shall be round and smooth, without defects such as dents, cracks, wrinkles, etc. 5.3.3
The radial runout of the outer circle of the roller shall comply with the provisions of Table 9. Table 9
Length of roller
Radial runout of roller
100~500
>500~1000
After assembly, the roller should rotate flexibly when moved by fingers without any jamming.>1000~1600
>1600~2000
5.3.5For rollers with a diameter not exceeding 60mm, when performing the flat plate sliding test, the sliding time of the test plate should not exceed the value specified in Table 10. Table 10
Straight section of conveyor
Curved section of conveyor
8=90°
5.3.6For rollers with a diameter exceeding 60mm, when performing the dynamic rotation resistance test, the rotation resistance should not exceed the value specified in Table 11. Perform the second test after an interval of 1h, and the rotation resistance should not exceed 1.5 times the value specified in Table 11. Table 11
Rotation resistance N
5.4 Frame
5.4.1 The straightness tolerance of the conveyor frame for the straight section is 1/1000 of its length within 3m. 5.4.2 The flatness tolerance of the conveyor frame for the straight section is 1/1000 of its length. Note: The length of the curved section frame is the arc length of its center line. The inner width limit deviation of the frame shall comply with the values specified in Table 12. 5.4.3
Roller length
Inner width limit deviation of the frame
≤630
The straight section frame of the conveyor under rated load shall not be greater than 1/700 of the distance between adjacent legs. 5.5 Transmission part
When the conveyor adopts chain drive, the chain shall comply with the requirements of GB1243.1, and the sprocket shall comply with the requirements of GB1244. When the conveyor is driven by belt, the flat belt should meet the requirements of GB524. The V belt should meet the requirements of GB1171. The drive device should run smoothly, be well lubricated, and there should be no oil leakage in the reducer. The tensioning device should be adjusted flexibly and without jamming. 5.5.4
5.6 Surface coating
JB/T 701293
5.6.1 Before painting, the steel surface should be derusted and should meet the Sa2 or St3 requirements in GB8923. 5.6.2 The rust-free surface should be primed in time. Painting should be carried out in a clean place, the ambient temperature should be above 5℃, the humidity should be below 85%, and the surface temperature of the workpiece should not exceed 60℃. 5.6.3 When there are no special requirements for the various parts of the conveyor, the primer should be applied once and the topcoat twice. The color of each layer of paint should be different. The film thickness of each layer of paint is 25~35um, and the total thickness of the paint film is not less than 75μm. The surface of the spool can be coated with only one layer of anti-rust paint or topcoat. When the surface of the spool is galvanized, chrome-plated, plastic-coated, rubber-coated, or made of stainless steel, aluminum alloy, or synthetic materials, it is not necessary to paint it. The exposed processing mating surface should be coated with anti-rust grease. 5.6.4· The coating adhesion should meet the requirements of Grade 2 in GB9286. 5.7 Installation of the whole machine
5.7.1 The general assembly of the whole machine is allowed to be carried out at the site of use. The sub-machine and drive device should be assembled or tested before leaving the factory. 5.7.2 The straightness tolerance of the center line of the conveyor frame is 5mm within any 25m length. 5.7.3 The tops of each roller should be located in the same plane, and the height difference △Ah (see Figure 4) between the tops of any three adjacent rollers should not be greater than the value specified in Table 13.
Roller length
100~500
>500~1000
>1000~1600
>1600~2000
The verticality tolerance between the axis of the roller of the straight section of the conveyor and the center line of the frame should be 1/500 of the length of the roller axis.5.7.4.
5.8 Machine operation performance
5.8.1 Each roller on the conveyor should rotate flexibly. The conveyor operation should be stable and reliable. The transmission parts such as chains should not have obvious pulsation and jamming during operation, and the driving device should have no abnormal belt vibration. 5.8.2.5
When the conveyor is running, the noise value of the whole machine should not be greater than the value specified in Table 14. 5.8.3
Operation status
Noise of the whole machine dB(A)
The normal service life of the conveyor should be no less than 20000h. 5.8.4
Non-powered type
Powered type
5.8.5 The service life of the conveyor under normal use conditions from the beginning of use to the first overhaul should be no less than 10000h. 5.9 Safety
The movable section of the conveyor (such as the passage section, the turning section, etc.) should be equipped with a positioning device at its extreme position to prevent it from rotating or falling. 5.9.1
The curved section of the conveyor should be equipped with a protective and guiding device. Chain-driven conveyors should be equipped with protective covers at the chain-driven transmission parts. When the conveyor is used for gravity conveying, the moving speed of the object should not exceed 0.5m/s. Various electromechanical protection devices should be sensitive and accurate and reliable. Protection devices for special occasions must comply with the provisions of the safety regulations of the relevant user departments.
:JB/T7012-93
5.10 Under the condition that the user complies with the storage, transportation, installation and use rules of the conveyor, within 18 months from the date of shipment from the manufacturer and the use time does not exceed 12 months, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge.
Test method
6.1 The physical and chemical properties of the materials used for each component of the conveyor shall be based on the factory certificate of the material, or sampling inspection shall be carried out. 6.2 The radial runout of the outer circle of the roller shall be measured with a micrometer, and the measuring position and number of points can be optional. 6.3 Conveyor plate sliding test
6.3.1. This test is applicable to conveyors with a roller diameter not exceeding 60mm, and is used to measure the flexibility of the roller rotation. During the test, the roller is in a free state (for a powered conveyor, the roller and the transmission member should be disengaged). 6.3.2 Conveyor straight section
The conveyor is 3m long, with a roller spacing of 100~160mm, and is inclined at 3° to the horizontal plane. Place the sliding test plate according to Figure 5. Align its end with the XX line, and use a white weight to make the test plate slide naturally on the roller, and measure the time required to reach the YY\ line at the other end. Figure 5
6.3.3 Conveyor curved section
The conveyor is inclined at 3° to the horizontal plane. Place the sliding test plate according to Figure 6, so that the center line of the test plate coincides with the OX line. Make the test plate slide naturally along the conveyor by its own weight, and measure the time when the front end of the test plate reaches the O'Y line (9=45°) or the O\Y\ line (9=90°). o
6.3.4 The sliding test plate in the above test is a 500mm×500mm square straight steel plate. The weight is 30kg, and the edge chamfer is 1X45\. The bottom surface in contact with the roller is not processed, and the original black skin is retained. 8
6.4 Dynamic rotation resistance test
Fixed axis roller
JB/T.7012-93
Before the test, the roller runs in at a speed of 1450r/min for 20min: the test environment temperature is 20~25℃;
As shown in Figure 7, the roller is placed on the test stand, and a force measuring rod is installed at the end of the roller shaft. The force measuring rod is fixed to the spool shaft and there is no relative rotation. The other end of the force measuring rod is placed on a scale with an accuracy of 2g. Apply a force of 250N to the roller to make the friction wheel fit tightly with the spool (there should be no slippage when the roller rotates), drive the spool to rotate at a speed of 300r/min, record the readings P and P on the scale, and then calculate the rotation resistance F of the roller according to the following formula.
2(PP)
Where: F—spool rotation resistance, N;
P—spool scale reading when the spool rotates N;
P—spool scale reading after the spool stops rotating. N: 1 force measuring rod force arm length, mm;
—spool diameter, mm.
Friction wheel
Force rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with bearing seat on the test frame, fix a force rod on the bearing seat at both ends of the roller, and place the other end of the force rod on a scale with an accuracy of 2g. The rest of the test method is the same as that of the fixed-axis roller. 250N
Friction wheel
Force rod
JB/T7012-93
The straightness and flatness of the frame are detected by a level. 6.5
The inner width of the frame is detected by a steel tape measure. 6.6
Determination of frame deflection
Apply the rated load to the two rollers in the center of the frame span, and measure the deflection value with a level. The paint film thickness is measured using a magnetic thickness gauge. 6.8
6.9 Paint film adhesion is tested by cross-cutting according to GB9286. 6.10 Roller top surface flatness test
Place the inspection flat ruler on the top of three adjacent sprockets and contact two or one sprocket (see Figure 4). Use the gap feeler gauge to measure the gap height Ah. When in contact with one sprocket, the gap value △h of the flat ruler and the other two sprockets should be the same. 6.11 The verticality between the axis of the sprocket and the center line of the frame is measured using an angle ruler. 6.12 Determination of the noise of the whole machine
After the drive device runs without load for 10 minutes, use a sound level meter to measure the noise of the drive device according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear. 6.13 The appearance quality of the conveyor and components and the operating condition of the whole machine shall be checked by visual inspection or touch. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 107.4.
5.8 Operational performance of the whole machine
5.8.1 Each roller on the conveyor should rotate flexibly. The conveyor should run smoothly and reliably. The transmission parts such as chains should not have obvious pulsation or jamming during operation, and the drive device should have no abnormal belt vibration. 5.8.2.5
When the conveyor is running, the noise value of the whole machine should not be greater than the value specified in Table 14. 5.8.3
Operation status
Noise of the whole machine dB(A)
The normal service life of the roller should not be less than 20,000 hours. 5.8.4
Non-powered type
Powered type
5.8.5 The service life of the conveyor under normal use conditions from the beginning of use to the first overhaul should not be less than 10,000 hours. 5.9 Safety
The moving sections of the conveyor (such as the passage section, the turning section, etc.) should be equipped with positioning devices at their extreme positions to prevent them from rotating or falling.5.9.1
The curved sections of the conveyor should be equipped with protective and guiding devices. Chain-driven conveyors should be equipped with protective covers at the chain-driven transmission parts. When the conveyor is used for gravity conveying, the moving speed of objects should not exceed 0.05m/s. Various electromechanical protection devices should be responsive and accurate and reliable. The protection devices used in special occasions must comply with the provisions of the safety regulations of the relevant user departments.
:JB/T7012-93
5.10 Under the condition that the user complies with the storage, transportation, installation and use rules of the conveyor, within 18 months from the date of shipment from the manufacturer and the use time does not exceed 12 months, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge.
Test method
6.1 The physical and chemical properties of the materials used for each component of the conveyor shall be in accordance with the factory certificate of the material, or sampling inspection shall be carried out. 6.2 The radial runout of the outer circle of the roller shall be measured with a micrometer, and the measuring position and number of points can be optional. 6.3 Conveyor flat plate sliding test
6.3.1. This test is applicable to conveyors with roller diameters not exceeding 60mm, and measures the flexibility of roller rotation. During the test, the roller is in a free state (for power conveyors, the rollers and transmission parts should be separated). 6.3.2 Conveyor straight section
The conveyor length is 3m, the roller spacing is 100~160mm, and it is inclined at 3° to the horizontal plane. Place the sliding test plate according to Figure 5. Align its end with the XX line, and use a white weight to make the test plate slide naturally on the roller, and measure the time required to reach the YY\ line at the other end. Figure 5
6.3.3 Conveyor curved section
The conveyor is inclined at 3° to the horizontal plane. Place the sliding test board according to Figure 6 so that the center line of the test board coincides with the OX line. Make the test board slide naturally along the conveyor by its own weight, and measure the time when the front end of the test board reaches the O'Y line (9=45°) or the O\Y\ line (9=90°). o
6.3.4 The sliding test board in the above test is a 500mm×500mm square straight steel plate. It weighs 30kg and has an edge chamfer of 1X45\. The bottom surface that contacts the roller is not processed and retains the original black skin. 8
6.4 Dynamic rotation resistance testWww.bzxZ.net
Fixed axis roller
JB/T.7012-93
Before the test, the roller is run-in at a speed of 1450r/min for 20min: the test environment temperature is 20-25℃;
As shown in Figure 7, the roller is placed on the test stand, and a force rod is installed at the end of the roller shaft. The force rod is fixed to the roller shaft and there is no relative rotation. The other end of the force rod is placed on a scale with an accuracy of 2g. Apply a force of 250N to the roller, so that the friction wheel fits tightly with the roller (there should be no slippage when the roller rotates), drive the roller to rotate at a speed of 300r/min, and record the readings P and P on the scale. Then calculate the rotation resistance F of the roller according to the following formula.
2(PP)
Where: F—resistance to roller rotation, N;
P—reading of the platform scale when the roller rotates, N;
P—reading of the background scale after the roller stops rotating. N: 1-length of the force measuring rod force arm, mm;
—diameter of the roller, mm.
Friction wheel
Force measuring rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with a bearing seat on the test frame, fix a force measuring rod on the bearing seats at both ends of the roller, and place the other end of the force measuring rod on a platform scale with an accuracy of 2g. The rest of the test method is the same as that of the fixed-axis roller 250N
Friction wheel
Force measuring rod
JB/T7012-93
The straightness and flatness of the frame are detected using a level. 6.5
The inner width of the frame is measured with a steel tape measure. 6.6
Measurement of frame deflection
Apply the rated load to the two rollers in the center of the frame span and measure the deflection value with a level. The paint film thickness is measured with a magnetic thickness gauge. 6.8
6.9The paint film adhesion is tested by a grid test according to GB9286. 6.10 Roller top surface flatness detection
Place the inspection flat ruler on the top of three adjacent sprockets and contact two or one sprocket (see Figure 4). Use a gap feeler gauge to measure the gap height Ah. In the case of contact with one sprocket, the gap value △h of the flat ruler and the other two sprockets should be the same. 6.11The verticality of the sprocket axis and the center line of the frame is measured with an angle ruler. 6.12 Determination of the whole machine noise
After the drive device runs without load for 10 minutes, use a sound level meter to measure the noise of the drive device according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear number. 6.13 The appearance quality of the conveyor and its components and the operating condition of the whole machine shall be checked by visual inspection or hand feeling. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory for production;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 107.4.
5.8 Operational performance of the whole machine
5.8.1 Each roller on the conveyor should rotate flexibly. The conveyor should run smoothly and reliably. The transmission parts such as chains should not have obvious pulsation or jamming during operation, and the drive device should have no abnormal belt vibration. 5.8.2.5
When the conveyor is running, the noise value of the whole machine should not be greater than the value specified in Table 14. 5.8.3
Operation status
Noise of the whole machine dB(A)
The normal service life of the roller should not be less than 20,000 hours. 5.8.4
Non-powered type
Powered type
5.8.5 The service life of the conveyor under normal use conditions from the beginning of use to the first overhaul should not be less than 10,000 hours. 5.9 Safety
The moving sections of the conveyor (such as the passage section, the turning section, etc.) should be equipped with positioning devices at their extreme positions to prevent them from rotating or falling.5.9.1
The curved sections of the conveyor should be equipped with protective and guiding devices. Chain-driven conveyors should be equipped with protective covers at the chain-driven transmission parts. When the conveyor is used for gravity conveying, the moving speed of objects should not exceed 0.05m/s. Various electromechanical protection devices should be responsive and accurate and reliable. The protection devices used in special occasions must comply with the provisions of the safety regulations of the relevant user departments.
:JB/T7012-93
5.10 Under the condition that the user complies with the storage, transportation, installation and use rules of the conveyor, within 18 months from the date of shipment from the manufacturer and the use time does not exceed 12 months, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge.
Test method
6.1 The physical and chemical properties of the materials used for each component of the conveyor shall be in accordance with the factory certificate of the material, or sampling inspection shall be carried out. 6.2 The radial runout of the outer circle of the roller shall be measured with a micrometer, and the measuring position and number of points can be optional. 6.3 Conveyor flat plate sliding test
6.3.1. This test is applicable to conveyors with roller diameters not exceeding 60mm, and measures the flexibility of roller rotation. During the test, the roller is in a free state (for power conveyors, the rollers and transmission parts should be separated). 6.3.2 Conveyor straight section
The conveyor length is 3m, the roller spacing is 100~160mm, and it is inclined at 3° to the horizontal plane. Place the sliding test plate according to Figure 5. Align its end with the XX line, and use a white weight to make the test plate slide naturally on the roller, and measure the time required to reach the YY\ line at the other end. Figure 5
6.3.3 Conveyor curved section
The conveyor is inclined at 3° to the horizontal plane. Place the sliding test plate according to Figure 6 so that the center line of the test plate coincides with the OX line. Make the test plate slide naturally along the conveyor by its own weight, and measure the time it takes for the front end of the test plate to reach the O'Y line (9=45°) or the O\Y\ line (9=90°). o
6.3.4 The sliding test plate in the above test is a 500mm×500mm square straight steel plate. It weighs 30kg and has an edge chamfer of 1X45\. The bottom surface that contacts the roller is not processed and retains the original black skin. 8
6.4 Dynamic rotation resistance test
Fixed axis roller
JB/T.7012-93
Before the test, the roller is run-in at a speed of 1450r/min for 20min: the test environment temperature is 20-25℃;
As shown in Figure 7, the roller is placed on the test stand, and a force rod is installed at the end of the roller shaft. The force rod is fixed to the roller shaft and there is no relative rotation. The other end of the force rod is placed on a scale with an accuracy of 2g. Apply a force of 250N to the roller, so that the friction wheel fits tightly with the roller (there should be no slippage when the roller rotates), drive the roller to rotate at a speed of 300r/min, and record the readings P and P on the scale. Then calculate the rotation resistance F of the roller according to the following formula.
2(PP)
Where: F—resistance to roller rotation, N;
P—reading of the platform scale when the roller rotates, N;
P—reading of the background scale after the roller stops rotating. N: 1-length of the force measuring rod force arm, mm;
—diameter of the roller, mm.
Friction wheel
Force measuring rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with a bearing seat on the test frame, fix a force measuring rod on the bearing seats at both ends of the roller, and place the other end of the force measuring rod on a platform scale with an accuracy of 2g. The rest of the test method is the same as that of the fixed-axis roller 250N
Friction wheel
Force measuring rod
JB/T7012-93
The straightness and flatness of the frame are detected using a level. 6.5
The inner width of the frame is measured with a steel tape measure. 6.6
Measurement of frame deflection
Apply the rated load to the two rollers in the center of the frame span and measure the deflection value with a level. The paint film thickness is measured with a magnetic thickness gauge. 6.8
6.9The paint film adhesion is tested by a grid test according to GB9286. 6.10 Roller top surface flatness detection
Place the inspection flat ruler on the top of three adjacent spools and contact two or one spool (see Figure 4). Use a gap feeler gauge to measure the gap height Ah. In the case of contact with one spool, the gap value △h of the flat ruler and the other two spools should be the same. 6.11The verticality of the spool axis and the center line of the frame is measured with an angle ruler. 6.12 Determination of the whole machine noise
After the drive device runs without load for 10 minutes, use a sound level meter to measure the noise of the drive device according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear number. 6.13 The appearance quality of the conveyor and its components and the operating condition of the whole machine shall be checked by visual inspection or hand feeling. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 105m/s. All kinds of electromechanical protection devices should be responsive, accurate and reliable. Protection devices for special occasions must comply with the provisions of the safety regulations of the relevant user departments.
: JB/T7012-93
5.10 Under the condition that the user complies with the storage, transportation, installation and use rules of the conveyor, within 18 months from the date of shipment from the manufacturer and the use time does not exceed 12 months, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge.
Test method
6.1 The physical and chemical properties of the materials used for each component of the conveyor shall be in accordance with the factory certificate of the material, or sampling inspection shall be carried out. 6.2 The radial runout of the outer circle of the sprocket shall be measured with a micrometer, and the measuring position and number of points are optional. 6.3 Conveyor flat plate sliding test
6.3.1. This test is applicable to conveyors with a sprocket diameter not exceeding 60mm, and measures the flexibility of the sprocket rotation. During the test, the rollers are in a free state (for powered conveyors, the rollers and transmission parts should be disengaged). 6.3.2 Straight section of conveyor
The conveyor is 3m long, the spacing between rollers is 100~160mm, and it is inclined at 3° to the horizontal plane. Place the sliding test board according to Figure 5. Align its end with the XX line. Use the deadweight to make the test board slide naturally on the rollers, and measure the time required to reach the YY\ line at the other end. Figure 5
6.3.3 Curved section of conveyor
The conveyor is inclined at 3° to the horizontal plane. Place the sliding test board according to Figure 6. Make the center line of the test board coincide with the OX line. Use the deadweight to make the test board slide naturally along the conveyor, and measure the time it takes for the front end of the test board to reach the O'Y line (9=45°) or the O\Y\ line (9=90°). o
6.3.4 The sliding test plate in the above test is a 500mm×500mm square straight steel plate. It weighs 30kg and has an edge chamfer of 1X45\. The bottom surface in contact with the roller is not processed and retains the original black skin. 8
6.4 Dynamic rotation resistance test
Fixed axis roller
JB/T.7012-93
Before the test, the roller runs at a speed of 1450r/min for 20min: the test environment temperature is 20～25℃;
As shown in Figure 7, the roller is placed on the test stand and a force rod is installed at the end of the roller shaft. The force rod is fixed to the roller shaft and there is no relative rotation. The other end of the force rod is placed on a platform scale with an accuracy of 2g. Apply a force of 250N to the roller, so that the friction wheel fits tightly with the spool (there should be no slippage when the roller rotates), drive the spool to rotate at a speed of 300r/min, record the readings P and P on the scale, and then calculate the rotation resistance F of the roller according to the following formula.
2(PP)
Where: F—spool rotation resistance, N;
P—spool scale reading when the spool rotates N;
P—spool scale reading after the spool stops rotating. N: 1 force measuring rod force arm length, mm;
—spool diameter, mm.
Friction wheel
Force measuring rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with a bearing seat on the test frame, fix a force measuring rod on the bearing seats at both ends of the spool, and place the other end of the force measuring rod on a scale with an accuracy of 2g. The rest of the test methods are the same as those for fixed-axis rollers. 250N
Friction
Force rod
JB/T7012-93
The straightness and flatness of the frame are tested with a level. 6.5
The inner width of the frame is tested with a steel tape measure. 6.6
Determination of frame deflection
Apply the rated load to the two rollers in the center of the frame span, and measure the deflection value with a level. The paint film thickness is measured with a magnetic thickness gauge. 6.8
6.9The paint film adhesion is tested in accordance with GB9286. 6.10 Roller top surface flatness test
Place the inspection flat ruler on the top of three adjacent rollers, and contact two or one roller (see Figure 4). Use a gap feeler gauge to measure the gap straightness Ah. When one sprocket is in contact, the gap value △h between the flat ruler and the other two sprockets should be the same. 6.11 The verticality between the axis of the sprocket and the center line of the frame is measured using an angle ruler. 6.12 Determination of the noise of the whole machine
After the drive device runs at no load for 10 minutes, use a sound level meter to measure the noise of the drive device according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear number. 6.13 The appearance quality of the conveyor and its components and the operating condition of the whole machine shall be checked by visual inspection or hand feeling. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory for production;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 105m/s. All kinds of electromechanical protection devices should be responsive, accurate and reliable. Protection devices for special occasions must comply with the provisions of the safety regulations of the relevant user departments.
: JB/T7012-93
5.10 Under the condition that the user complies with the storage, transportation, installation and use rules of the conveyor, within 18 months from the date of shipment from the manufacturer and the use time does not exceed 12 months, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge.
Test method
6.1 The physical and chemical properties of the materials used for each component of the conveyor shall be in accordance with the factory certificate of the material, or sampling inspection shall be carried out. 6.2 The radial runout of the outer circle of the sprocket shall be measured with a micrometer, and the measuring position and number of points are optional. 6.3 Conveyor flat plate sliding test
6.3.1. This test is applicable to conveyors with a sprocket diameter not exceeding 60mm, and measures the flexibility of the sprocket rotation. During the test, the rollers are in a free state (for powered conveyors, the rollers and transmission parts should be disengaged). 6.3.2 Straight section of conveyor
The conveyor is 3m long, the spacing between rollers is 100~160mm, and it is inclined at 3° to the horizontal plane. Place the sliding test board according to Figure 5. Align its end with the XX line. Use the deadweight to make the test board slide naturally on the rollers, and measure the time required to reach the YY\ line at the other end. Figure 5
6.3.3 Curved section of conveyor
The conveyor is inclined at 3° to the horizontal plane. Place the sliding test board according to Figure 6. Make the center line of the test board coincide with the OX line. Use the deadweight to make the test board slide naturally along the conveyor, and measure the time it takes for the front end of the test board to reach the O'Y line (9=45°) or the O\Y\ line (9=90°). o
6.3.4 The sliding test plate in the above test is a 500mm×500mm square flat steel plate. It weighs 30kg and has an edge chamfer of 1X45\. The bottom surface in contact with the roller is not processed and retains the original black skin. 8
6.4 Dynamic rotation resistance test
Fixed axis roller
JB/T.7012-93
Before the test, the roller runs at a speed of 1450r/min for 20min: the test environment temperature is 20～25℃;
As shown in Figure 7, the roller is placed on the test stand and a force rod is installed at the end of the roller shaft. The force rod is fixed to the roller shaft and there is no relative rotation. The other end of the force rod is placed on a platform scale with an accuracy of 2g. Apply a force of 250N to the roller, so that the friction wheel fits tightly with the spool (there should be no slippage when the roller rotates), drive the spool to rotate at a speed of 300r/min, record the readings P and P on the scale, and then calculate the rotation resistance F of the roller according to the following formula.
2(PP)
Where: F—spool rotation resistance, N;
P—spool scale reading when the spool rotates N;
P—spool scale reading after the spool stops rotating. N: 1-force measuring rod arm length, mm;
—spool diameter, mm.
Friction wheel
Force measuring rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with a bearing seat on the test frame, fix a force measuring rod on the bearing seats at both ends of the spool, and place the other end of the force measuring rod on a scale with an accuracy of 2g. The rest of the test methods are the same as those for fixed-axis rollers. 250N
Friction
Force rod
JB/T7012-93
The straightness and flatness of the frame are tested with a level. 6.5
The inner width of the frame is tested with a steel tape measure. 6.6
Determination of frame deflection
Apply the rated load to the two rollers in the center of the frame span, and measure the deflection value with a level. The paint film thickness is measured with a magnetic thickness gauge. 6.8
6.9The paint film adhesion is tested in accordance with GB9286. 6.10 Roller top surface flatness test
Place the inspection flat ruler on the top of three adjacent rollers, and contact two or one roller (see Figure 4). Use a gap feeler gauge to measure the gap straightness Ah. When one sprocket is in contact, the gap value △h between the flat ruler and the other two sprockets should be the same. 6.11 The verticality between the axis of the sprocket and the center line of the frame is measured using an angle ruler. 6.12 Determination of the noise of the whole machine
After the drive device runs without load for 10 minutes, use a sound level meter to measure the noise of the drive device according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear number. 6.13 The appearance quality of the conveyor and its components and the operating condition of the whole machine shall be checked by visual inspection or hand feeling. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 107012-93
Before the test, the roller was run-in at a speed of 1450r/min for 20min: the test environment temperature was 20～25℃;
As shown in Figure 7, the roller was placed on the test stand, and a force rod was installed at the end of the roller shaft. The force rod was fixed to the roller shaft and there was no relative rotation. The other end of the force rod was placed on a scale with an accuracy of 2g. A force of 250N was applied to the roller to make the friction wheel fit tightly with the roller (there should be no slippage when the roller rotates), and the roller was driven to rotate at a speed of 300r/min, and the readings P and P on the scale were recorded. Then the rotation resistance F of the roller was calculated according to the following formula.
2(PP)
Where: F—roller rotation resistance, N;
P—scale reading when the roller rotates, N;
P. —The scale reading after the roller stops rotating. N: 1 The length of the force rod arm, mm;
A roller diameter, mm.
Friction wheel
Force rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with bearing seat on the test frame, fix a force rod on the bearing seat at both ends of the roller, and place the other end of the force rod on a scale with an accuracy of 2g. The rest of the test method is the same as that of the fixed-axis roller. 250N
Friction wheel
Force rod
JB/T7012-93
The straightness and flatness of the frame are detected by a level. 6.5
The inner width of the frame is detected by a steel tape measure. 6.6
Determination of frame deflection
Apply rated load to the two rollers in the center of the frame span and measure the deflection value with a level. The paint film thickness is measured using a magnetic thickness gauge. 6.8
6.9The paint film adhesion is tested in accordance with GB9286. 6.10Roller top surface flatness detection
Place the inspection flat ruler on the top of three adjacent rollers and contact two or one roller (see Figure 4). Use the gap feeler gauge to measure the gap height Ah. In the case of contact with one roller, the gap value △h of the flat ruler and the other two rollers should be the same. 6.11The verticality between the axis of the roller and the center line of the frame is measured using an angle ruler. 6.12Determination of the whole machine noise
After the drive unit runs without load for 10 minutes, use a sound level meter to measure the noise of the drive unit according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear number. 6.13 The appearance quality of the conveyor and its components and the operating condition of the whole machine shall be inspected by visual inspection or hand feeling. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 107012-93
Before the test, the roller was run-in at a speed of 1450r/min for 20min: the test environment temperature was 20～25℃;
As shown in Figure 7, the roller was placed on the test stand, and a force rod was installed at the end of the roller shaft. The force rod was fixed to the roller shaft and there was no relative rotation. The other end of the force rod was placed on a scale with an accuracy of 2g. A force of 250N was applied to the roller to make the friction wheel fit tightly with the roller (there should be no slippage when the roller rotates), and the roller was driven to rotate at a speed of 300r/min, and the readings P and P on the scale were recorded. Then the rotation resistance F of the roller was calculated according to the following formula.
2(PP)
Where: F—roller rotation resistance, N;
P—scale reading when the roller rotates, N;
P. —The scale reading after the roller stops rotating. N: 1 The length of the force rod arm, mm;
A roller diameter, mm.
Friction wheel
Force rod
6.4.2 Rotating shaft roller
As shown in Figure 8, place the rotating shaft roller with bearing seat on the test frame, fix a force rod on the bearing seat at both ends of the roller, and place the other end of the force rod on a scale with an accuracy of 2g. The rest of the test method is the same as that of the fixed-axis roller. 250N
Friction wheel
Force rod
JB/T7012-93
The straightness and flatness of the frame are detected by a level. 6.5
The inner width of the frame is detected by a steel tape measure. 6.6
Determination of frame deflection
Apply rated load to the two rollers in the center of the frame span and measure the deflection value with a level. The paint film thickness is measured using a magnetic thickness gauge. 6.8
6.9The paint film adhesion is tested in accordance with GB9286. 6.10Roller top surface flatness detection
Place the inspection flat ruler on the top of three adjacent rollers and contact two or one roller (see Figure 4). Use the gap feeler gauge to measure the gap height Ah. In the case of contact with one roller, the gap value △h of the flat ruler and the other two rollers should be the same. 6.11The verticality between the axis of the roller and the center line of the frame is measured using an angle ruler. 6.12Determination of the whole machine noise
After the drive unit runs without load for 10 minutes, use a sound level meter to measure the noise of the drive unit according to the rectangular hexahedron method specified in GB3769. Place the sound level meter on the contour line of the sprocket (or transmission chain), 1m away from the sprocket (or transmission chain), and measure the noise according to the A gear number. 6.13 The appearance quality of the conveyor and its components and the operating condition of the whole machine shall be inspected by visual inspection or hand feeling. 7 Inspection rules
7.1 Each conveyor shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and shall be accompanied by a product certificate. 7.2 Inspection classification
7.2.1 Factory inspection
The factory inspection items include:
Article);
Inspection of roller material, appearance, radial runout and rotation flexibility (see Article 5.3.1 to 5.3.4); inspection of frame straightness, flatness, inner width and deflection (see Article 5.4); inspection of transmission part (see Article 5.5);
Paint film thickness and adhesion test (see Article 5.6); after the whole machine is installed, the straightness of the frame, the flatness of the top of the roller, and the verticality between the roller axis and the center line of the frame are tested (see Article:.7 Inspection of the running status of the whole machine.
Type inspection
Type inspection should be carried out in any of the following situations: trial production of new products;
Trial production of old products transferred to the factory;
There are major changes in product structure, materials, and processes that may affect the production When the product performance is tested; when the product is out of production for more than three years and then resumes production, the type inspection items include:
All factory inspection items (see Article 7.2.1); conveyor plate sliding test (see Article 5.3.5); dynamic rotation resistance test (see Article 5.3.6); whole machine noise detection (see Article 5.8.3). d.
7.3 Inspection quantity
The spooler shall be inspected according to the general inspection level 1 and the normal inspection sampling plan specified in GB2828. The frame shall be inspected at 10% of the conveyor length. After the whole machine is installed, the flatness of the top surface of the spooler and the verticality of the spooler axis and the center line of the frame shall also be inspected at 10% of the conveyor length.
All other inspection items shall be inspected.
7.4 When the inspection fails according to the sampling quantity, double sampling shall be conducted. If the double sampling fails, it shall be judged as unqualified. 10
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