Some standard content:
QB/T1421--2000
This standard is a revision of QB/T1421-1991 "Resistance Welding Can Body Assembly Machine". This standard is quite different from QB/T1421-1991 in terms of technical content. The technical requirements in the original standard have been greatly revised. The following clauses have been cancelled:
1. In Chapter 2 "Reference Standards", six items including QB/T842.4, QB/T842.5, QB/T842.6, ZBJ64008, ZBJ50004, and JB/T2524 have been cancelled.
2. Chapter 8 "Quality Assurance" has been cancelled.
From the date of implementation of this standard, the industry standard QB/T1421-1991 "Resistance Welding Can Body Assembly Machine" issued by the former Ministry of Light Industry will be abolished. This standard was proposed by the Industry Management Department of the State Bureau of Light Industry. This standard The Food Machinery Sub-Technical Committee of the National Technical Committee for Standardization of Light Industry Machinery is responsible for this standard. The drafting units of this standard are: Beijing Institute of Aeronautical Technology (625th Institute of China Aviation Industry Corporation), Shantou Light Industry Machinery (Group) Company, China Aviation Industry Corporation State-owned Anzhong Machinery Factory, Qingdao Forging Machinery Group Company. The main drafters of this standard are: Chen Zhiguang, Zheng Zhichuan, Gao Wenli, Xing Jibai. 244
1 Scope
Light Industry Standards of the People's Republic of China
Resistance Welding Can Body Assembly Machine
QB/T 1421—2000
Replaces QB/T1421--1991
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of resistance welding can body assembly machines.
This standard applies to automatic and semi-automatic resistance welding can body assembly machines for thin steel sheet metal containers for food and industry (hereinafter referred to as "assembly machines"), which consist of processes such as forming, welding, re-coating and drying. Cited 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 will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T191-1990 Pictorial markings for packaging, storage and transportation GB/T5226.1--1996 Industrial machinery and electrical equipment Part 1: General technical conditions GB/T 13306-1991#
GB/T14253—1993
General technical conditions for light industrial machinery
GB/T 16768—19973
Determination of sound pressure level of metal cutting machine toolsQB/T 1588.1—1992
QB/T 1588.2—1992
QB/T 1588.3-—1992
QB/T 1588. 4—1993
General technical conditions for welded parts of light industrial machinery
General technical conditions for cut parts of light industrial machineryGeneral technical conditions for assembly of light industrial machinery
General technical conditions for painting of light industrial machinery
General technical conditions for packaging of light industrial machinery
QB/T 1588.5—1996
3 Product classification
3.1 Classification by can body specifications
a) Large can assembly machine: Applicable can body diameter 99mm~350mm; b) Small can assembly machine: Applicable can body diameter 52mm~105mm. 3.2 Classification by degree of automation
a) Semi-automatic assembly machine: Forming, welding, re-coating and drying processes are completed by a single machine, b) Automatic assembly machine: Forming, welding, re-coating and drying processes are completed continuously and automatically. 3.3 Classification by welding speed
a) High-speed assembly machine: welding speed ≥30m/min; b) Medium-speed assembly machine: welding speed 12m/min~30m/min; c) Low-speed assembly machine: welding speed ≤12m/min. 3.4 Product Model
Approved by the State Bureau of Light Industry on March 30, 2000
Implemented on August 1, 2000
QB/T 1421--2000
Design Sequence Number (expressed in Arabic numerals)-Variety Code (Can Body and Container, expressed in uppercase Chinese Pinyin letters)Classification Code (Combination Equipment, expressed in Arabic numerals)Professional Code (Canned Food: expressed in uppercase Chinese Pinyin letters)Note: Product models are issued by the industry unit (National Light Industry Machinery Standardization Center). 4 Technical Requirements
4.1 General Requirements
4.1.1 The manufacture of combination machines shall comply with the provisions of GB/T14253. 4.1.2 Combination machines shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. All parts and outsourced parts shall be inspected and qualified by the quality inspection department of the combination machine manufacturer, and purchased parts shall be assembled only with a certificate of conformity. 4.1.3 The quality requirements for parts processing, component assembly and final assembly shall comply with the provisions of QB/T1588.1, QB/T1588.2 and QB/T1588.3.
The painting of the combined machine shall comply with the provisions of QB/T1588.4. 4.1.4
4.2 Technical parameters
4.2.1 Welding technical parameters, see Table 1.
Table 1 Technical Parameters
Parameter Name
Welding Speed/(m/min)
Production Capacity/(Can/min)
Diameter of Can/mm
Height of Can/mm
Ratio of Can Height to Can Diameter
Thickness of Can/mm
Overlap Width/mm
Welding Frequency/Hz
4.2.2 Width of Re-coating Strip: (10±4)mm. Commercial
≥300
52~105
76~260
≥360
4.2.3 Temperature Adjustment Range of Baking Oven Mouth: 200℃～450℃. Medium
80~300
52~172
65~280
0.18~0.35
0. 4~0. 6
100~360
4.2.4 Power supply: not more than 90kW (electric heating), or not more than 65kW (gas heating). 4.3 Working conditions
4.3.1 Ambient temperature: 5℃~40℃.
4.3.2 Input voltage
a) Voltage: (380±19)V:
b) Frequency: 50Hz.
4.3.3 Cooling water
a) Temperature: 3℃～12℃;
b) Pressure: 0.4 MPa~~0.6 MPa;
c) Flow rate: 8 L/min~32 L/min.
4.3.4 Compressed air
52~350
80~400
0.20～0.40
50~120
a) Pressure: 0.4 MPa0.6 MPa;
QB/T1421—2000
b) Flow rate: 1000L/min~2000 L/min;4.3.5 Copper wire
4.3.5.1 The surface of the copper wire should be smooth, without oxide layer, scratches, rust spots, cracks, oil stains, dirt, etc. 4.3.5.2 Requirements
a) Material: pure copper T2;
b) Heat treatment: annealing;
c) Resistivity: 91.5, should not be greater than 0.01739Qmm2/m at 20℃; d) Elongation at the breaking point should not be less than 35%; e) Diameter: 1.27_0.04 mm, 1.38_8.0 mm or (1.50±0.01) mm. 4.3.6 Nitrogen
Purity should not be less than 99.5%.
4.3.7 Plate
4.3.7.1 Material
Tin-plated thin steel plate or weldable steel-based thin plate. www.bzxz.net
4.3.7.2 Shearing requirements
The cut of the plate must be flush, the surface must be flat and smooth, without rust, oil stains, dirt, etc., and meet the following requirements. a) Length deviation: ±0.05mm;
b) Width deviation: ±0.05mm;
c) Burr height: not more than 0.15 times the plate thickness; d) Perpendicularity tolerance of wide side to long side: when the wide side is less than 280mm, it shall not be more than 0.05mm over a length of 100mm; when the wide side is greater than 280mm, it shall not be more than 0.05mm over a length of 200mm. 4.3.7.3 Scraping yellow requirements
When using coated iron, hollow iron shall be used. When there is no hollow, the coating layer that affects welding at the welding edge must be cleaned before welding, which is called "scraping yellow".
The width of hollow or scraping yellow is 1.5mm～3.0mm, the scraped yellow belt should be flat and smooth, no serious damage to the tinned layer is allowed, and no coating, oil stains and other dirt should be left.
4.3.8 The re-coating area and baking area should have good exhaust devices and fire-fighting facilities. 4.4 Assembly
4.4.1 The gap difference between the upper and lower round rollers shall not exceed 0.03mm. 4.4.2 The verticality of the side plate of the forming machine to the front plane of the machine base shall not exceed 0.20mm within a length of 300mm. 4.4.3 The parallelism of the axis of the brazing arm to the front plane of the machine base shall not exceed 0.20mmg within a length of 300mm. 4.4.4 The symmetry of the mounting support of the sizing gauge to the z guide rail shall not exceed 0.015mm within a length of 300mm. 4.4.5 The verticality of the front plane of the bottom plate of the sizing gauge to the axis of the brazing arm shall not exceed 0.10mm within a length of 200mm. 4.4.6 The radial runout of each welding wheel should not exceed 0.025mm, and the axial runout should not exceed 0.04mm. 4.4.7 The nozzle or roller of the re-coating machine is located in the middle of the two conveyor belts, and its deviation is not more than 2mm. 4.4.8 The furnace openings of the drying machine are required to be on a central line, with a deviation of no more than 2mm within a length of 1000mm, and a deviation of no more than 5mm from the conveyor belt.
4.5 Working requirements for parts
4.5.1 The functions of each moving part shall meet the following requirements. 4.5.1.1 The feeding mechanism is flexible and the feeding position is correct, without any misoperation or malfunction. 4.5.1.2 The body sheet separation mechanism is reliable, and the protective device must be activated when double sheets appear. 4.5.1.3 The rollers of the forming machine operate freely without any jamming. 247
QB/T1421—2000
4.5.1.4 The push claws of the push can mechanism are accurately positioned and coordinated with the movement of the forming machine, and there should be no jamming. 4.5.1.5 The copper wire pressing, transmission, cutting and other mechanisms move normally, and the copper wire should not be twisted or loose during movement. When passing through the groove of the welding wheel, it should not deviate. When the wire is broken, the safety mechanism should be activated, the wire should be cut reliably, and the copper wire conduit should be smooth. 4.5.2 Each automatic control button, adjustment knob, and indicator light should be sensitive and reliable, and the signal should be correct. 4.5.3 In the middle section of the large current waveform of the welding current, when the voltage fluctuation is ±5%, the current fluctuation is not more than ±3%. 4.5.4 After the combined machine has worked continuously for 2 hours, there is no heat source that affects the welding quality. 4.5.5 The re-coating system moves smoothly and works normally. 4.5.6 The baking conveyor runs smoothly, and there shall be no jumping, rotation jamming or falling during the can body conveying process. The gas, water and paint pipelines are unobstructed, there shall be no leakage at the joints, and there shall be no abnormal deformation of the pipelines. 4.5.7
All pneumatic control devices work normally. When the pneumatic components are not in motion, the pressure gauge pointer shall not swing. 4.5.9 When the combined machine is running as a whole, the movement of each moving part shall be coordinated, reliable, stable and normal. No stagnation, abnormal impact sound and screaming are allowed.
4.5.10 The noise sound pressure level of the combined machine shall not exceed 85dB(A) when it is running idle. The temperature rise of each rolling bearing of the forming machine shall not exceed 40℃, and the maximum temperature shall not exceed 75℃. 4.5.11
4.5.12 The surface temperature rise of all motors shall comply with the relevant standards. 4.5.13 The surface temperature of the welding transformer shall not exceed 60℃, the no-load current shall not exceed 1A, and the insulation resistance of the primary coil to the machine body shall not be less than 2.5Mo.
4.5.14 The copper wire routing mechanism and the Z-type guide rail, sizing gauge, and swing head shall be insulated from the machine body, and the Z-type guide rail shall be insulated from the welding arm, with an insulation resistance of not less than 0.5Mo.
4.5.15 The flattened width of the copper wire is shown in Table 2.
Table 2 Copper wire flattening width
Copper wire diameter
Flattening width
1.82~1.85
The elongation of the copper wire is not more than 2%, calculated according to formula (1): 1.38
1.82~1.85
_A-H×100
Where: S is the elongation of the copper wire, %;
A---the length of the wire with metal attached or can body attenuation after welding, mm; H-the height of the welded can body, mm.
4.6 Can body quality
The can body has no obvious edges and corners, and the tin plating layer or paint layer and iron coating on the inner and outer walls of the can shall not have obvious scratches and mechanical damage. 4.6.11
The weld points of the weld should be evenly connected, and there should be no cold welds, leaking welds or pinholes. There should be no spatter points on the inner and outer welds. 4.6.2
The spacing between weld points is 0.6 mm~2 mm.
The lap width of the weld should comply with the requirements of Table 1.
The ratio of weld thickness to body thickness is shown in Table 3. 4.6.5
Table 3 Ratio of weld thickness to body thickness
Lap width/mm
Ratio of weld thickness to body thickness
4.6.6 The misalignment of the weld ends should not exceed 0.5 mm, and the tail of the weld end should not exceed 0.5 mm. 4.6.7 The tensile strength of the weld should not be lower than the tensile strength of the body. 4.6.8 The weld should be well sealed and no air leakage is allowed. 4.6.9 The oxide film on the weld surface should be thin and uniform, without peeling. 248
QB/T 1421—2000
4.6.10 When using nitrogen shielded welding, no black oxide film should appear on the weld. 4.6.11 The center of the width of the patch coating strip should not be offset by more than 3mm from the weld. 4.6.12 The coating film is baked and cured well, and no obvious bubbles, missing coating and coating accumulation are allowed on the coating strip. 4.6.13 During normal operation, the can body scrap rate is less than 1%. 4.7 Appearance quality
4.7.1 The appearance surface of the assembly machine should not have protrusions, depressions, roughness and other damage not specified in the drawings. The joints of the cover plate, cover shell, etc. should be flat, the exposed pipes and lines should be arranged neatly and firmly, and the exposed joint surfaces should not have obvious misalignment. 4.7.2 Paint quality of assembly machine
4.7.2.1 The paint layer should be flat and smooth, and the color and gloss should be uniform; the coating of hammer paint must have clear and uniform hammer patterns, and no obvious depressions or sandpaper marks are allowed. 4.7.2.2 The appearance of the paint film must be clean, without obvious protruding particles and adhesions, and no sagging, bubbling, whitening, loss of gloss and obvious orange peel are allowed. 4.7.2.3 The paint layer of the assembly joint surface of the components must have clear boundaries, and the edges and corners must be clear and neat. 4.7.2.4 If the assembly machine has different colors of paint, they must not be contaminated with each other. 4.7.3 Anti-rust quality
4.7.3.1 The exposed non-working surfaces of carbon steel parts are electroplated, bluing or spray-painted. 4.7.3.2 Aluminum parts are anodized or spray-painted. 4.8 Hygiene and safety requirements
4.8.1 All parts in contact with the body and tank body must not be contaminated with harmful oil and other harmful substances. 4.8.2 The operating part of the combined machine should have reliable anti-loosening devices and safety protection devices. 4.8.3 There should be various signs and signs indicating lubrication, operation and safety on the combined machine, and the main rotating parts should have arrow symbols indicating the direction of rotation. Exposed strong electrical components should have obvious safety warning signs, and the signs and safety signs should be clear and durable. 4.8.4 The electrical system of the combined machine should be tested for withstand voltage, insulation, and continuity of protection circuits in accordance with the requirements of GB/T5226.1. The protection, safety grounding, installation and wiring of the control components of the electrical system should also comply with the provisions of GB/T5226.1. 4.9 Reliability indicators
4.9.1 Working conditions
4.9.1.1 Should comply with the provisions of 4.3.
4.9.1.2 Operate and maintain according to the instruction manual of the combined machine. 4.9.2 Life of main wearing parts (calculated based on tank height of 100mm) See Table 4 for the life of main wearing parts.
Table 4 Life of main wearing parts
5 Test method
Z-type guide rail
≥2 000
Main drive gearbox
≥2000
5.1 The working conditions of the combined machine during the test shall comply with the provisions of 4.3. 5.2 Technical parameters Performance test
Rounding roller
≥2000
5.2.1 The adjustable range of copper wire speed (i.e. welding speed) measured by a tachometer shall comply with the provisions of Table 1. 10,000 cans
Small welding wheel
≥400
5.2.2 Use a stopwatch to count the number of times the pusher or pusher claws move. The production capacity variation range should comply with the provisions of Table 1 (based on a can height of 100 mm).
5.2.3 Check the inner diameter and height of the welded can body according to the structural dimensions of the storage device, forming machine, and sizing gauge. They should comply with the provisions of Table 1. 5.2.4 When using the body plate of the thickness specified in Table 1 and testing under the working conditions of 4.3, the can body quality should comply with the provisions of 4.6. The can body quality test method shall be carried out in accordance with the provisions of 5.5.3.
QB/T1421—2000
5.2.5 Turn off the welding current, suck in two can body plates into a circle and make indentations with the welding wheel, and use a scale magnifying glass with an accuracy of 8 times or more and 0.02mm to measure the width of the indentations at 10mm at both ends and the midpoint of the weld. Count and screen the arithmetic mean of 6 measured values, which shall comply with the provisions of 4.6.4. 5.2.6 Take 5 can bodies and pass the re-coating, and use a vernier caliper to check the width of the re-coating band, which shall comply with the provisions of 4.2.2. 5.2.7 Use a Class 1 resistance thermometer or a Class 2 thermocouple to measure the drying temperature at 5mm from the furnace mouth, which shall comply with the provisions of 4.2.3. 5.2.8 Use a clamp ammeter (Class 2.5) and a voltmeter (Class 2.5) to check the current and voltage at the power interface, and the calculated power shall comply with the provisions of 4.2.4.
5.2.9 Use a frequency tester to measure the welding frequency conversion range, which shall comply with the provisions of Table 1. 5.3 Assembly accuracy inspection
5.3.1 Use a feeler gauge to measure the gap difference between the upper and lower rounding rollers, which shall comply with the provisions of 4.1.1. 5.3.2 Use a square and a feeler gauge to measure the verticality error of the side plate of the forming machine to the front plane of the machine base, which shall comply with the provisions of 4.4.2. Use a height vernier caliper to measure the parallelism error of the copper welding arm axis to the front plane of the machine base, which shall comply with the provisions of 4.4.3. 5.3.3
5.3.4 Use a square, vernier caliper and block gauge to measure the symmetry of the mounting support of the sizing gauge to the B guide rail, which shall comply with the provisions of 4.4.4. Use a square and a vernier caliper to measure the verticality error of the front plane of the bottom plate of the sizing gauge to the axis of the copper welding arm, which shall comply with the provisions of 4.4.5. 5.3.5
Use a dial indicator to measure the radial and axial circular runout of the welding wheel, which shall comply with the provisions of 4.4.6. 5.3.6
Use a vernier caliper to measure the dimensional error of the nozzle or roller wheel of the re-coating machine in the middle of the two conveyor belts, which shall comply with the provisions of 4.4.7. 5.3.7
5.3.8 Use a steel wire to measure the error of each furnace mouth on a straight line, and use a vernier caliper to measure the dimensional error of each furnace mouth from the middle of the two conveyor belts, which shall comply with the provisions of 4.4.8.
5.4 Components Precision Test
Power on, ventilate, and water the combined machine, operate with the adjustment button, and check the function of each moving part respectively, which shall comply with the provisions of 4.5.1. 5.4.1
5.4.2 Use a micrometer to measure the width of the copper wire pressure fan, which shall comply with the provisions of 4.5.15. 5.4.3
Remove the copper wire, turn off the drying heat source, and run the combined machine idly for 4 hours continuously. Check the operation of the whole machine, which shall comply with the provisions of 4.5.2~4.5.9.
Use an ordinary sound level meter to measure the noise sound pressure level of the combined machine in accordance with the provisions of GB/T16768, which shall comply with the provisions of 4.5.10. 5.4.4
5.4.5 After the combined machine has been running idly for 4 hours, stop it and use a 2-level precision spot thermometer to measure the temperature rise of each rolling bearing of the forming mechanism, the surface temperature rise of all motors, and the surface temperature of the welding transformer. They shall comply with the provisions of 4.5.11 to 4.5.13 respectively. 5.4.6 Use an ammeter to measure the no-load current of the welding transformer, and use a 500V, 2.5-level precision megohmmeter to measure the insulation resistance of the primary coil of the welding transformer to the machine body. They shall comply with the provisions of 4.5.13. 5.4.7 Use a low-voltage high-resistance meter or a multimeter (high resistance range) to measure the insulation of the copper wire routing mechanism and the B-shaped guide rail, sizing gauge, swing head to the machine body, and the insulation of the Z-shaped guide rail and the welding arm. The insulation resistance shall comply with the provisions of 4.5.14. 5.5 Load test
5.5.1 After the no-load test is passed, the load test is carried out. The following conditions should be met during the test. 5.5.1.1 Select a can type and a speed. 5.5.1.2 Use the same brand of body plate and weld continuously (semi-automatic, low speed 100 pieces; medium and high speed 1000 pieces). If there is a need for re-coating, re-coating and baking should be carried out at the same time.
5.5.2 After welding, use a vernier caliper to measure the length of the copper wire with metal tin or body indentation and the height of the can body. Calculate the elongation of the copper wire according to formula (1). It should comply with the provisions of 4.5.16.
5.5.3 Can body quality inspection
5.5.3.1 Randomly select 10 samples and visually inspect the can body welds. They should comply with the provisions of 4.6.1 and 4.6.2. 5.5.3.2 Randomly select 2 samples and measure the weld thickness with a wall thickness micrometer. The thickness shall comply with the provisions of 4.6:5. 5.5.3.3 Randomly select 2 samples and use a scale magnifying glass to check the weld point spacing, the misalignment of the two ends of the can body and the tailing of the weld end. The welds shall comply with the provisions of 4.6.3 and 4.6.6 respectively.
5.5.3.4 Randomly select 2 samples and use the tearing method to cut the welds at 5mm~~10mm on both sides of the welds to form triangular cracks. Flatten and fix the can body. Clamp the cut end of the weld with wire cutters and apply force evenly and continuously to tear the weld strip vertically from the 250
can body surface.
QB/T 1421—2000
A weld that can be completely torn out and then bend 180° back and forth twice without breaking or peeling off shall be deemed to meet the requirements of 4.6.7 and be judged as qualified. A weld that breaks during tearing or can be pulled out as a whole but breaks or peels off after a single 180° reciprocating bend shall be deemed to be unqualified.
Two specimens shall be randomly selected, sealed and inflated to 0.07MPa (gauge pressure) at both ends, immersed in water and maintained at pressure for 2 minutes, and no bubbles shall overflow from the weld. The sealing performance shall meet the requirements of 4.6.8. 5.5.3.6 Two uncoated specimens shall be randomly selected for flanging and rolling. Visual inspection shows that there is no cracking or oxide film peeling at the flanging and rolling, which shall meet the requirements of 4.6.9.
5.5.3.7 Randomly select 2 samples and visually inspect the weld surface. It shall comply with the provisions of 4.6.10. 5.5.3.8 Randomly select 2 samples and use a vernier caliper to measure the offset of the center of the patch tape to the weld. It shall comply with the provisions of 4.6.11. 5.5.3.9 Randomly select 2 samples and visually inspect the appearance quality of the patch tape. Then use absorbent cotton ethanol (purity 95%) to wipe the patch tape 30 times (each reciprocating is one time). Take another 2 pieces and boil them in boiling water for 30 minutes. After the above tests, the coating film shall not change color, dissolve, fall off, or solidify. It shall comply with the provisions of 4.6.12.
5.5.3.10 Use the test method of 5.2.5 to check the overlap width of the weld. It shall comply with the provisions of 4.6.4. 5.5.3.11 During the acceptance inspection by the user unit, the scrap rate of continuous production (semi-automatic: 3,000 cans; low speed: 5,000 cans, medium and high speed: 10,000 cans) shall comply with the provisions of 4.6.13.
5.6 Appearance inspection
Visually inspect the combined machine, and the appearance quality shall comply with the provisions of 4.7. 5.7 Sanitation and safety inspection
5.7.1 Visually inspect the combined machine, and the sanitation and safety conditions shall comply with the provisions of 4.8.1~~4.8.3. 5.7.2 The electrical system shall be subjected to withstand voltage, insulation, and protection circuit continuity tests in accordance with the requirements of 20.2~20.4 of GB/T5226.1-1996, and shall comply with the provisions of 4.8.4.
5.8 Reliability assessment
Evaluate the use records of the main wearing parts under the working conditions of 4.9.1 according to the user's requirements. 6 Inspection rules
6.1 The manufacturer shall conduct a factory inspection on each assembly machine. The inspection items shall include the contents of 4.4 to 4.8 (except 4.6.13). If the above provisions are met, it shall be judged as a qualified product and a certificate of qualification shall be issued. 6.2 In the following cases, the assembly machine shall be subject to type inspection. a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance; c) During normal production, regular spot checks shall be conducted once a year; d) When production is resumed after suspension for more than three years;
e) When the factory inspection results are significantly different from the results of the previous type inspection; f) When the national quality supervision agency proposes a requirement for type inspection. 6.3 Each time a type inspection is conducted, one machine shall be randomly inspected. The inspection items shall include all the contents of Chapter 5. If the provisions of this chapter are met, the type inspection shall be judged to be qualified.
6.4 When the can body quality is tested according to 5.5.3, if one or more tests fail to meet the requirements of this standard, double samples should be taken for retesting. When all samples are qualified, the test is judged to be qualified, otherwise it is judged to be unqualified. 6.5 When unqualified items appear in the test items, it is allowed to conduct a second test after adjusting the assembly machine, and the results of the second test will be used as the basis for judgment.
6.6 Users have the right to accept according to this standard. In case of disputes over product quality, any party to the dispute has the right to ask the relevant product quality supervision department for arbitration.
7 Marking, packaging, transportation, storage
QB/T 1421-—2000
7.1 The label on the combined machine shall be fixed at the position indicated in the drawing. The label shall comply with the provisions of GB/T13306, and the contents shall include: a) manufacturer name and trademark, b) product name and model: c) manufacturing date and factory number, d) main parameters. 7.2 Tank accessories shall have corresponding markings. 7.3 The outer wall of the packaging box shall have clear and neat markings, and the packaging storage and transportation graphic markings shall comply with the provisions of GB/T191, and the contents shall include: a) combined machine model and name: b) factory number, c) packaging box dimensions, gross weight and storage and transportation marks, d) destination (port) and receiving unit and address; e) departure (port) and shipping unit, factory date (or packaging date) g) box number.
7.4 The packaging of the combined machine shall comply with the provisions of GB/T1588.5. 7.5 Each combined machine shall be accompanied by the following technical documents: a) product certificate (and the adopted standard number shall be indicated), b) product instruction manual,
c) product wearing parts and spare parts chart;
d) packing list.
7.6 The packaging of the combined machine shall comply with the regulations for water and land transportation, and shall not be collided during transportation. 7.7 When storing the combined machine, attention should be paid to waterproofing, moisture-proofing and preventing corrosion by corrosive substances, and it should be prevented from being damaged by stacking. 252
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