JB/T 3716-1999 Technical requirements for pneumatic micro-vibration compaction molding machines
Some standard content:
ICS77.180
Machinery Industry Standard of the People's Republic of China
JB/T3716—1999
Pneumatic Micro-vibration Compacting Molding Machine
Technical Conditions
Published on May 14, 1999
National Bureau of Machinery Industry
Implemented on January 1, 2000
JB/T3716—1999
This standard is a revision of JB3716-84 "Technical Conditions for Pneumatic Micro-vibration Compacting Molding Machine". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard replaces JB3716-84 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Foundry Machinery Standardization. The responsible drafting unit of this standard: Jinan Foundry and Forging Machinery Research Institute. The main drafter of this standard: Ling Ding. Xiong
This standard was first issued in June 1984.
1 Scope
Machinery Industry Standard of the People's Republic of China
Pneumatic Micro-vibration Compacting Molding Machine
Technical Conditions
JB/T3716—1999
Replaces JB371684
This standard specifies the technical requirements, inspection rules and test methods, as well as marking, packaging, transportation, etc. of the pneumatic micro-vibration compacting molding machine. This standard applies to single-column pneumatic micro-vibration compacting molding machines (hereinafter referred to as machines) used in foundry molding. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 18041992
GB/T5226.1—1996
GB/T13306—1991
JB/T16441991
JB/T2707—1999
JB/T8356.1—1996
3 Technical requirements
General tolerances Unspecified tolerances for linear dimensions
Industrial machinery and electrical equipment Part 1: General technical conditions Signs
General technical conditions for casting machinery
Micro-vibration compaction molding machine Type and basic parameters Technical conditions for machine tool packaging
3.1 The type, basic parameters and dimensions of the machine shall conform to the provisions of JB/T2707. 3.2 The machine shall comply with the provisions of this standard and JB/T1644, and shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 3.3 The electrical system shall comply with the relevant provisions of GB/T5226.1. 3.4 Casting, forging, riveting, welding, and sheet metal parts shall comply with the provisions of the relevant current standards. 3.5 The uninjected tolerance dimensions of machined parts shall comply with the m-level tolerance requirements in GB/T18041992. 3.6 The type and size of the machine nameplate shall comply with the provisions of GB/T13306. 3.7 There shall be no impurities such as iron filings and dirt inside the machine, and the cleanliness shall comply with the provisions of the relevant standards. Sharp angles and sharp edges shall be blunted, and burrs shall be removed.
3.8 The working medium poured into the machine shall be clean and comply with the provisions of the relevant technical documents. 3.9 Electrical components shall be sensitive, and pneumatic and hydraulic components shall be flexible and reliable, and shall be accepted in accordance with the requirements of the relevant standards. 3.10 All cylinder bodies shall not have defects such as sand holes and air holes that affect working performance. Before assembly, a sealing test shall be carried out under the test pressure specified in the drawings or technical documents.
3.11 The production and testing of pressure vessels must comply with relevant national regulations and have a certificate of conformity. 3.12 Each moving pair of the machine shall have a good lubrication device, the lubrication oil channel shall be unobstructed, and each lubrication point must have a clear mark. 3.13 All exposed important moving parts shall be equipped with dustproof devices. 3.14 The layout of pneumatic and hydraulic pipelines shall be arranged neatly for easy maintenance, and their assembly shall be firm and reliable. Approved by the State Bureau of Machinery Industry on May 14, 1999 and implemented on January 1, 2000
JB/T3716-1999
3.15 The pipeline system of the machine shall have a main valve, and the electrical system shall have a main stop button to ensure safety. 3.16 The operating handle shall be flexible and reliable, accurately positioned, and clearly marked. The noise of the machine shall not exceed the equivalent continuous A sound level of 100dB(A). 3.17
4 Inspection rules and test methods
4.1 General acceptance rules
Each machine shall be inspected and qualified by the technical inspection department of the manufacturer before it can leave the factory. When leaving the factory, it shall be accompanied by a product certificate. 4.2
Inspection items
The machine shall be inspected or tested according to the following items: a) Machine performance inspection;
b) Idle running test:
) Load test:
d) Accuracy inspection;
e) Appearance inspection;
f) Packaging inspection.
4.3 Machine performance inspection
4.3.1 Static pressure strength
The inspection method and tolerance of static pressure strength are shown in Table 1 and Figure 1. 1-Indenter: 2-Standard dynamometer: 3 Workbench Figure 1
Inspection items
Static pressure strength
JB/T3716-1999
Inspection method
Place the third-class standard dynamometer used for material testing machine between the indenter and the workbench, as shown in Figure 1. The workbench is raised with an air pressure of 0.55±0.4MPa, and the dynamometer is pressurized. The static pressure strength can be read on the pressure gauge
The tolerance calculation of static pressure strength is shown in formula (1):
Where: F
Where: F
In the formula: p
Measured compaction force, N;
Calculated compaction force, see formula (2), N.
Total compaction force, see formula (3), N;
Friction between the sealing ring and the cylinder wall, N;
-Weight of the lifting part, N.
Working air pressure in the compaction cylinder, Pa:
-Area of the compaction piston, cm2.
4.3.2 Dynamic pressure force
The inspection method and tolerance of dynamic pressure force are shown in Table 2 and Figure 2 Pressure head: 2 Load sensor: 3 Workbench
Inspection items
Dynamic pressure force
JB/T3716-1999
Inspection method
A resistive load sensor is placed between the pressure head and the workbench of the molding machine, as shown in Figure 2. The full bridge is connected to the dynamic resistance strain gauge. When the workbench is vibrated and compacted at the same time, the load sensor will have a signal output, which will be amplified by the dynamic resistance strain gauge and then passed to the optical oscilloscope to obtain the dynamic pressure strength over time curve. 4.4 Idle operation test
Dynamic pressure strength
Static pressure strength
4.4.1 The machine runs idle for 1 hour at the specified air pressure. The actions of all pneumatic and hydraulic devices, electrical equipment, adjustment mechanisms, etc. of the machine should be coordinated and reliable, and there should be no leakage, oil leakage, action failure, etc. 4.4.2 Under the condition of stable air pressure, the vibration frequency is not allowed to fluctuate. 4.4.3 The rotation of the pressure head should be smooth and flexible, and there should be good buffering when turning in and out, and there should be no obvious impact. 4.4.4 The rotation angle should comply with the requirements of the machine drawing. The position after rotation should be easy to adjust so that the center of the pressure head coincides with the center of the workbench. 4.4.5 The gap between the crossbeam of the rotary pressure head and the fixed column is not more than 0.2mm, and a whole gasket is allowed to be placed on the bottom of the insert. 4.4.6 The demoulding piston should be adjusted according to the machine drawing requirements to ensure its stroke, and the rise and fall should be flexible without creeping. 4.4.7 The double-cylinder demoulding mechanism should ensure synchronization during the demoulding process. 4.5 Load test
4.5.1 When the gas pressure is stable in the range of 0.55±0.04MPa, the molding test is carried out under the effective load according to the molding process requirements. The mold cavity of the sand mold should not be loose or cracked, and the surface hardness should not be less than 80 units. 4.5.2 After the sand mold made by the machine meets the process requirements, 3 to 5 sand molds should be made continuously, and the quality should be stable and consistent. 4.5.3 For making a sand mold, the maneuvering time of each cycle of the machine cannot exceed the design requirements. 4.6 Accuracy inspection
4.6.1 Leveling
Before checking the machine accuracy, first adjust the machine level. Place a ruler on the workbench and a level on the ruler. The level should be placed at position II to II-II for measurement, as shown in Figure 3. The reading of the level should not exceed 0.1/1000.1
4.6.2 Flatness of the workbench surface
The inspection method and tolerance of the flatness of the workbench surface are shown in Table 3 and Figure 4. 4
Inspection items
Flatness of the workbench surface
JB/T3716-1999
Inspection method
Select three points a, b and c on the workbench surface as the reference, as shown in Figure 4. Place three equal-thickness gauge blocks on these three points. The upper surfaces of these gauge blocks are the reference planes for comparison with the plane to be inspected. Place a ruler on points a and c, and place an adjustable gauge block at point e on the plane to be inspected so that it contacts the lower surface of the ruler. At this time, the upper surfaces of a, b, c and e gauge blocks are all in the same plane. Then place the ruler on points b and e, and place an adjustable gauge block at point d so that it contacts the lower surface of the ruler. Place a straightedge on a and d, b and c, a and b, d and c, a and c, b and d. Use a gauge block or micrometer under the straightedge to measure the distance between the straightedge and the inspected surface at any point. The maximum and minimum distance difference is the flatness error of the inspected plane (the deflection of the straightedge should be considered when necessary). 4.6.3 Parallelism between the compaction surface of the indenter and the workbench surface The inspection method and tolerance for the parallelism between the compaction surface of the indenter and the workbench surface are shown in Table 4 and Figure 5. 1 Micrometer: 2 - Compaction surface of the indenter: 3 - Working surface of the workbench Figure 5
is 0.1 on a length of 1000mm (only the middle of the workbench is allowed). Inspection items
Parallelism between the compaction surface of the indenter and the workbench surface
J B/T3716-1999
Place a wooden block on the workbench surface and compact it under an air pressure of 0.15-0.2MPa. As shown in Figure 5. Install the micrometer on a bracket with a flat base surface, and place the bracket on the workbench surface. The probe of the micrometer is against the compaction surface of the pressure head, and the measurement is made in the vertical and horizontal directions. The measured error is expressed as the maximum value of the micrometer. 4.6.4 Within the demolding stroke range, the horizontal displacement of the demolding rod relative to the workbench.
Within the demolding stroke range, the inspection method and tolerance of the horizontal displacement of the demolding rod relative to the workbench are shown in Table 5 and Figure 6. 1 Square: 2-Micrometer: 3 Demolding rod: 4 Workbench working surface Figure 6
Inspection items
Within the demolding stroke range||tt ||In the horizontal direction of the ejector rod relative to the workbench, place the square on the workbench, place the micrometer stand on the ejector rod, and the probe of the micrometer is on the surface of the square. The position of the probe is equivalent to the lowest point of the model. Raise the ejector stand, and its stroke is the maximum ejection stroke, as shown in Figure 6. The measurement in the vertical and horizontal directions is 0.15 on a length of 100mm. JB/T3716-1999
4.6.5 Synchronicity of the lifting of the left and right beams of the double-cylinder ejector mechanism. The inspection method and tolerance of the synchronization of the lifting of the left and right beams of the double-cylinder ejector mechanism are shown in Table 6 and Figure 7. Middle
Ejector rod: 2-Beam: 3 Screws: 4 Sets: 5 Micrometer: 6 Square ：7-connecting rod: 8-slewing pin: 9 load figure 7
Inspection items
Synchronization of lifting of left
right beam of double cylinder demoulding mechanism
Inspection method
Place the synchronization inspection device on the machine demoulding ejector rod, the probe of the micrometer is pressed on the flat seat of the connecting rod, the micrometer is pre-loaded so that the pointer points to 2~3mm, the bottom plate of the micrometer is aligned at 0, and then the demoulding is carried out. If it is not synchronized, the value can be read on the micrometer, and the synchronization value of the lifting of the left and right beams can be calculated according to the formula
Synchronization calculation is shown in formula (4)
Where: h
A micrometer contact moving distance, mm:
L-distance between the ejector rod axes, mm:
-tool reference distance, mm.
4.6.6 The parallelism of the working surface of the demoulding roller (double row) to the workbench surface is 0.36 for sand box 800mm
and below: 0.5 for sand box 800mm
and above. The inspection method and tolerance of the parallelism of the working surface of the demoulding roller (double row) to the workbench surface are shown in Table 7 and Figure 8. 7
Inspection items|| tt||Die-pulling roller working surface
(double row) For the parallelism of the work
table surface
JB/T3716-1999
1 micrometer; 2-flat ruler; 3 roller: 4 worktable Figure 8
Inspection method
Place the flat ruler on the roller, the micrometer seat on the worktable, the micrometer head on the flat ruler, and move along the die-pulling track, as shown in Figure 8. The difference between the maximum and minimum readings when the micrometer moves on the flat ruler is the parallelism error
4.6.7 The accuracy of the flat ruler, square ruler, standard pad, and special dial indicator seat used for measurement is all level 2. 4.7 The pneumatic micro-vibration compaction molding machine should be inspected for appearance quality before packaging. 4.8 Packaging inspection
0.1
on a length of 100mm
4.8.1 The exposed surfaces of the parts, components, accessories and spare parts of the pneumatic micro-vibration compaction molding machine shall be rust-proofed before packaging and shall comply with the provisions of relevant standards.
4.82 The packaging and marking of the pneumatic micro-vibration compaction molding machine and its components shall be suitable for the requirements of land and water transportation and loading, and shall comply with the provisions of JB/T8356.1.
Mechanical Industry Standard
Pneumatic Micro-vibration Compacting Molding Machine
Technical Conditions
JB/T3716—1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of words 18000
Format 880×1230
First edition in July 1999
First printing in July 1999
Number of prints 1-500
Price 1000 yuan
99-272
666-9 /5 Synchronicity of lifting of left and right beams of double-cylinder die-lifting mechanism The inspection method and tolerance of the synchronization of lifting of left and right beams of double-cylinder die-lifting mechanism are shown in Table 6 and Figure 7. Middle
Top rod: 2-beam: 3 screws: 4 sets: 5 micrometer: 6 angle ruler: 7-connecting rod: 8-swivel pin: 9 load Figure 7
Inspection items
Synchronicity of lifting of left
right beam of double-cylinder die-lifting mechanism
Inspection method
Place the synchronization inspection device on the die-lifting top rod of the machine, the probe of the micrometer is on the flat seat of the connecting rod, the micrometer is pre-pressed so that the pointer points to 2~3mm, the chassis of the micrometer is aligned to the 0 position, and then the die is lifted. If they are not synchronized, the value can be read on the micrometer. The synchronization value of the lifting of the left and right beams can be calculated according to the formula. Synchronicity calculation is shown in formula (4). Where: h - distance of movement of a micrometer contact, mm; L - distance between the axis of the ejector rod, mm; tool reference distance, mm. 4.6.6 Parallelism of the demoulding roller working surface (double row) to the workbench surface is 0.36 for sand boxes 800 mm and below: 0.5 for sand boxes 800 mm and above. The inspection method and tolerance of the parallelism of the demoulding roller working surface (double row) to the workbench surface are shown in Table 7 and Figure 8. 7 Inspection items tt||Die-pulling roller working surface
(double row) For the parallelism of the work
table surface
JB/T3716-1999
1 micrometer; 2-flat ruler; 3 roller: 4 worktable Figure 8
Inspection method
Place the flat ruler on the roller, the micrometer seat on the worktable, the micrometer head on the flat ruler, and move along the die-pulling track, as shown in Figure 8. The difference between the maximum and minimum readings when the micrometer moves on the flat ruler is the parallelism error
4.6.7 The accuracy of the flat ruler, square ruler, standard pad, and special dial indicator seat used for measurement is all level 2. 4.7 The pneumatic micro-vibration compaction molding machine should be inspected for appearance quality before packaging. 4.8 Packaging inspection
0.1
on a length of 100mm
4.8.1 The exposed surfaces of the parts, components, accessories and spare parts of the pneumatic micro-vibration compaction molding machine shall be rust-proofed before packaging and shall comply with the provisions of relevant standards.
4.82 The packaging and marking of the pneumatic micro-vibration compaction molding machine and its components shall be suitable for the requirements of land and water transportation and loading, and shall comply with the provisions of JB/T8356.1.
Mechanical Industry Standard
Pneumatic Micro-vibration Compacting Molding Machine
Technical Conditions
JB/T3716—1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of words 18000
Format 880×1230
First edition in July 1999
First printing in July 1999
Number of prints 1-500
Price 1000 yuan
99-272
666-9 /5 Synchronicity of lifting of left and right beams of double-cylinder die-lifting mechanism The inspection method and tolerance of the synchronization of lifting of left and right beams of double-cylinder die-lifting mechanism are shown in Table 6 and Figure 7. Middle
Top rod: 2-beam: 3 screws: 4 sets: 5 micrometer: 6 angle ruler: 7-connecting rod: 8-swivel pin: 9 load Figure 7
Inspection items
Synchronicity of lifting of left
right beam of double-cylinder die-lifting mechanism
Inspection method
Place the synchronization inspection device on the die-lifting top rod of the machine, the probe of the micrometer is on the flat seat of the connecting rod, the micrometer is pre-pressed so that the pointer points to 2~3mm, the chassis of the micrometer is aligned to the 0 position, and then the die is lifted. If they are not synchronized, the value can be read on the micrometer. The synchronization value of the lifting of the left and right beams can be calculated according to the formula. Synchronicity calculation is shown in formula (4). Where: h - distance of movement of a micrometer contact, mm; L - distance between the axis of the ejector rod, mm; tool reference distance, mm. 4.6.6 Parallelism of the demoulding roller working surface (double row) to the workbench surface is 0.36 for sand boxes 800 mm and below: 0.5 for sand boxes 800 mm and above. The inspection method and tolerance of the parallelism of the demoulding roller working surface (double row) to the workbench surface are shown in Table 7 and Figure 8. 7 Inspection items tt||Die-pulling roller working surface
(double row) For the parallelism of the work
table surface
JB/T3716-1999
1 micrometer; 2-flat ruler; 3 roller: 4 worktable Figure 8
Inspection method
Place the flat ruler on the roller, the micrometer seat on the worktable, the micrometer head on the flat ruler, and move along the die-pulling track, as shown in Figure 8. The difference between the maximum and minimum readings when the micrometer moves on the flat ruler is the parallelism error
4.6.7 The accuracy of the flat ruler, square ruler, standard pad, and special dial indicator seat used for measurement is all level 2. 4.7 The pneumatic micro-vibration compaction molding machine should be inspected for appearance quality before packaging. 4.8 Packaging inspection
0.1
on a length of 100mm
4.8.1 The exposed surfaces of the parts, components, accessories and spare parts of the pneumatic micro-vibration compaction molding machine shall be rust-proofed before packaging and shall comply with the provisions of relevant standards.
4.82 The packaging and marking of the pneumatic micro-vibration compaction molding machine and its components shall be suitable for the requirements of land and water transportation and loading, and shall comply with the provisions of JB/T8356.1.
Mechanical Industry Standard
Pneumatic Micro-vibration Compacting Molding Machine
Technical Conditions
JB/T3716—1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of words 18000
Format 880×1230
First edition in July 1999
First printing in July 1999
Number of prints 1-500bzxZ.net
Price 1000 yuan
99-272
666-9 /
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