QB/T 1515-1992 Industrial sewing machine GN high-speed overlock machine head
Some standard content:
Light Industry Standard of the People's Republic of China
GN High-speed Overlock Machine Head
Industrial Sewing Machine (
1 Subject Content and Scope of Application
QB/T 1515-1992
This standard specifies the product classification, technical requirements, test methods, inspection rules, as well as marking, packaging, transportation, storage, etc. of GN high-speed overlock machine heads.
This standard applies to GN high-speed overlock machine heads (hereinafter referred to as "heads") for hemming and overlocking of knitted and woven fabric products made of various cotton, wool, silk, linen and chemical fibers. 2 Reference Standards
GB/T4514 Rules for Compiling Sewing Machine Models
GB/T4515 Classification and Terminology of Stitches
ZBY17004 Sewing Machine Packaging
ZBY17023 Test Method for Starting Torque of Sewing Machine Heads 3 Terminology and Symbols||t t||3.1 Safety seam: A seam consisting of two independent rows of 504-type and 401-type stitches. 3.2 Differential ratio: The ratio of the movement of the differential feed dog to the movement of the main feed dog. 3.3 Reverse differential: The movement of the differential feed dog is greater than the movement of the main feed dog, and the sewing material stretches during the sewing process. 3.4 Forward differential: The movement of the differential feed dog is less than the movement of the main feed dog, and the sewing material shrinks during the sewing process. 3.5 No-load: The working state of the overlock sewing machine when the stitch length of the overlock sewing machine is adjusted to the maximum, the differential ratio is 1:1, the presser foot and cutter are removed, no thread is inserted, and there is no sewing material.
3.6 Sewing speed: The number of needle punches per minute, needles/min. 4 Product categories
4.1 Type| |tt||This machine is a platform-type machine body, adopts needle bar thread picking, curved needle thread hooking, bottom feeding, and has a cutting device and automatic lubrication system. 4.2 Classification
4.2.1 Products can be divided into: 502, 503, 504, 505, 512, 514 and 401 plus 504 composite stitches, etc. according to the stitch type (GB/T4515). 4.2.2 Products can be divided into: 5000 stitches/min~7000 stitches/min according to sewing speed. 4.3 Basic parameters
Maximum sewing speed: not less than 5000 stitches/min; Stitch length: not less than 2mm;
Differential ratio: The maximum differential ratio of the forward differential is not less than 1.4; the small differential ratio of the reverse differential is not more than 0.8 ; Cutting width: not less than 2.5mm;
Presser foot lifting height: not less than 3mm;
Needle: GN type Nm75~Nm90;
Approved by the Ministry of Light Industry of the People's Republic of China on June 8, 1992 216
Implemented on February 1, 1993
QB/T1515-1992
Thread: 9.5tex×3 (60 counts/3 strands), 7.5tex×4 (80 counts/4 strands) cotton thread or polyester-cotton thread;
Motor power: not less than 400W.
4.4 Model representation method
Models are compiled in accordance with the provisions of GB/T4514.
Example:
5 Technical requirements
—Derivation number
~Design sequence number
Hemming chain stitch, straight seam, needle bar thread pick-up, curved needle thread hook, bottom feeding industrial use
5.1 Appearance quality
5.1.1 The surface of the baking varnish should be flat and uniform in color, and the main visible parts should not have obvious defects such as paint flow, blistering and paint contact. 5.1.2 There should be no rust or stains on the surface of the machine head, and the label should be complete, correctly positioned, and without obvious scars. 5.1.3 There should be no burrs on the exposed parts and screw heads of the machine head. 5.1.4 The surface of the electroplated part should be flat, smooth, and uniform in color, and should not have defects such as missing plating, peeling, spots, scratches and rust. 5.1.5 The surface of the blackened part should have a uniform color, and should not have defects such as blanks, sediments, light spots, scratches and rust. 5.2 Machine performance
5.2.1 Stitch length, cutting edge width, differential ratio, thread tension, thread feed rate and presser foot pressure should be adjustable. 5.2.2 The cutter should be sharp and the cutting edge should be neat. 5.3 Sewing performance
The sewing performance test should be carried out under the test conditions specified in Article 6.3 and Table 1. There should be no defects such as broken needles, broken threads and skipped stitches. Table 1
Test items
Ordinary sewing
Sewing of thin materials
Sewing of medium and thick materials
Use bell thread
7. 5tex × 4
(80S/4)
Cotton or polyester thread
7. 5tex X 4
(80S/4)
Cotton or polyester thread
9. 5texX3
(60S/3)
Cotton or polyester thread
Polyester-cotton cloth
Sanitary fleece
Size (1Xb)
1000×100
1000×100
1000×100
Sewing speed
Maximum sewing speed
Maximum sewing speed
Test items
Continuous sewing
Pigtail sewing
Used sewing thread
7. 5tex× 4
(80S/4)
Cotton or polyester thread
7. 5tex X 4
(80S/4)
Cotton or lacquered nylon thread
7.5tex×4
(80S/4)
Cotton or polyester thread
QB/T1515-1992
Continued Table 1
Size (lxb)
130 Medium plain cloth 700×100
2000×100
Polyester cotton cloth
Not shorter than 50
Ordinary sewing: Within 1m of sewing, the seam should be clear. Sewing of thin materials: Within 1m of sewing, there should be no floating thread and wrinkles. Sewing of medium and thick materials: Within 1m of sewing, the cutting edge should be neat. Layer seam: Sewing 0.5m in length for 5 times.
Continuous sewing: sewing length 5m.
Thread braid sewing: the thread should come out smoothly during sewing, and the length should not be shorter than 50mm. 5.4 Operation performance
Operation noise
When running at the highest sewing speed without load, there should be no abnormal noise; stitch
Sewing speed
Highest sewing speed
Highest continuous speed
Highest sewing speed
200,150|100|50|0059
Use 2m long and 0.1m wide sewing material to make a cloth ring
When running at 90% of the highest sewing speed without load, the noise sound pressure level value should not exceed the provisions of Table 2. Table 2
5.4.2 Vibration displacement
Maximum sewing speed
needles/min
≥5500
≥6500
When running at 90% of the maximum sewing speed without load, the vibration displacement value should not be greater than 350μm. 5.4.3 Starting torque
Should not be greater than the provisions of Table 3.
Sealing ring
5.4.4 During operation, the oil supply and return of the lubrication system should be good, and there should be no oil leakage on the joint surfaces. 5.5 Accessories and spare parts
Noise sound pressure level index
Maximum starting torque
QB/T 1515-1992
The accessories and spare parts equipped with each machine head should comply with the product manual or packing list. 6 Test method
6.1 Appearance quality
Under the light of 600±200lx, the inspection distance is 500mm, and it is judged by visual inspection. 6.2 Machine performance
6.2.1 The adjustment of stitch length, cutting edge width, differential ratio, thread tension, thread output and presser foot pressure shall be adjusted in the sewing performance test items according to the provisions of the instruction manual.
6.2.2 The cutting knife is sharp and the cutting edge is neat. Test in the ordinary sewing items. 6.3 Sewing performance test
Before the test, clean the surface of the machine head, and remove the dirt on the needle plate, feed dog, curved needle and thread passing parts. Add lubricating oil and run at 90% of the highest sewing speed for 5 minutes, and then test each item according to the provisions of Table 1; the sewing speed is tested with a non-contact tachometer, and the test sewing speed tolerance is -3%; b.
Before each test, trial sewing and adjustment of stitch length, trim width, differential ratio, thread tension, thread feed amount and presser foot pressure are allowed. c
However, adjustment is not allowed during the formal test. 6.4 Running performance
6.4.1 Running noise
6.4.1.1 When running at the highest sewing speed without load, there should be no abnormal noise, which can be judged by listening. 6.4.1.2
Noise level test
6. 4. 1.2.1
Test conditions
The test should be carried out in a semi-anechoic room;
The background interference noise should be at least 10dB(A) lower than the noise level of the machine head; there should be no other objects that reflect sound or other conditions that affect the noise test; the machine head to be tested and the frame should be placed stably on a level and solid ground; the axis of the microphone should be aligned with the center of the needle plate and the plane of the needle plate at an angle of 45°, with a distance of 450mm (see Figure 1). Microphone
6.4.1.2.2 Test instrument
Use a sound level meter with an accuracy of ±0.7dB or a spectrum analyzer with comprehensive performance equivalent to this accuracy. 6.4.1.2.3 Test procedure
Microphone
Add lubricating oil according to the instructions for use, take 90% of the maximum sewing speed and run it without load for 1 minute, and then measure the noise value; 219
b. Test 5 times and take the arithmetic mean.
6.4.2 Vibration
6.4.2.1 Test conditions
QB/T 1515—1992
The test environment should not be affected by external vibration, temperature, humidity, airflow, noise, electromagnetic field, etc. The machine head to be tested and the frame should be placed stably on a level and solid ground, with a height of 750 from the ground to the plane on the table. The frequency range of the vibration sensor is 10-1000Hz; the mass of the vibration sensor should not exceed 50g. 6.4.2.2
Test procedure
Run at 90% of the highest sewing speed without load; the tension of the motor drive belt should ensure that the vibration of the machine head is in the most stable state; the sensor is magnetically attracted to the plane of the needle plate (see Figure 2); Measurement direction: according to Figure 2;
Measure 3 times, and take the maximum value as the vibration displacement value. 6.4.3 Starting torque
According to ZBY17023.
Sensor
6.4.4 Lubrication and sealing
6.4.4.1 Test conditions
Run at 90% of the maximum sewing speed, no-load operation; run for 5s, stop for 5s, and run for 10min with the song. b.
6.4.4.2 Test procedures
Visually check the oil supply of the oil window;
Before the test, place a 120mmX50mm white paper on the needle plate surface. After the test, check that there should be no oil stains on the white paper; b.
Visually check that there should be no oil leakage at each joint and oil pan. c.
6.5 Accessories and spare parts
Accessories and spare parts should be counted one by one according to the instructions for use or the packing list, and the number should not be less than the specified number. 7 Inspection rules
7.1 Ex-factory products must be inspected and qualified by the enterprise's quality inspection department and be accompanied by an inspection certificate. There should be a continuous stitch seam sample under the presser foot, the size of the seam sample (L×b) is 120mm×50mm, see Figure 3. 7.2 Inspection classification 7.2.1 Factory inspection The consignee has the right to inspect and accept the factory inspection items according to the provisions of this standard. 7.2.2 Type inspection In the following cases, it is necessary to conduct a comprehensive assessment of product quality and type inspection: a. Trial design identification of new products or old products transferred to the factory for production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, the first inspection should be carried out periodically for six months of normal production; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Non-conforming categories and inspection categories
Inspection items, non-conforming categories and inspection categories are shown in Table 4. The sample unit is each sewing machine head, and the B category is counted as non-conforming products, and the C category is counted as the number of non-conforming products.
Appearance quality
Machine performance
Sewing performance
Inspection items
Non-conforming categories
Inspection categories
Running performance
Parts and spare parts
7.3 Factory inspection rules
7.3.1 Sample selection
Inspection items
Samples should be randomly selected from the inspection batch submitted. 7.3.2 Sampling plan and strictness
QB/T15151992
Continued Table 4
Unqualified categories
Inspection classification
The normal inspection single sampling plan is shown in Table 5, the determination of strictness and its transfer rules, and the single sampling plan after transfer shall comply with the provisions of GB/T2828.
7.3.3 Judgment of qualified or unqualified inspection batches According to the results of sample inspection, if the number of unqualified products of Class B and the number of unqualified products of Class C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), the inspection batch is judged to be a qualified batch. If the number of unqualified products of Class B and the number of unqualified products of Class C found in the sample are either greater than or equal to the corresponding unqualified judgment number (R.), the inspection batch is judged to be an unqualified batch. Table 5
Inspection level
Sample
Unqualified category
Unit sample inspection items
Acceptable quality level (AQL)
Batch range
1511200
Sample size code
7.3.4 Disposal of unqualified products and batches after inspection Sample size
The ordering party has the right to reject unqualified products found during inspection in qualified batches. S2
Normal inspection sampling
In principle, all batches judged as unqualified will be returned to the supplier or resolved by negotiation between the supplier and the ordering party. R
On the basis of 100% inspection of unqualified batches, the supplier will remove or repair the unqualified products found and allow them to be submitted for inspection again.
For the batches submitted for inspection again, whether to use normal inspection or strict inspection, whether to inspect all items or only the items that cause the batch to fail, shall be determined by the ordering party.
7.4 Rules for type inspection
7.4.1 Sample extraction
QB/T 1515—1992
Samples shall be extracted from a batch or several batches manufactured in this cycle and qualified by factory inspection, and the obtained samples shall be guaranteed to represent the manufacturing technology level of this cycle.
7.4.2 Sampling plan
The sub-sampling plan for type inspection is shown in Table 6. Table 6
Discrimination level
Sampling plan
Number of non-conforming items
Number of unit sample inspection items
Number of non-conforming quality level (RQL)
7.4.3 Judgment of pass or fail in type inspection B
According to the results of sample inspection, if the number of non-conforming products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), then the batch is judged to be a qualified batch. If the number of non-conforming products of category B and category C found in the sample is either greater than or equal to the corresponding non-conforming judgment number (R.), then the batch is judged to be a non-conforming batch. 7.4.4 Disposition after type inspection
Disposition after type inspection shall be in accordance with Article 4.12 of GB/T2829. 8. Labeling, packaging, transportation and storage
8.1 Labeling
The following labels shall be marked on the machine head:
Manufacturer name;
b. Trademark,
Product model or mark;
d. Manufacturing date or number.
8.2 Packaging, transportation and storage
According to the provisions of ZBY17004.
Additional remarks:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.1 Test conditions
QB/T 1515—1992
The test environment should not be affected by external vibration, temperature, humidity, airflow, noise, electromagnetic field, etc.; the machine head to be tested and the frame should be placed stably on a horizontal and solid ground, and the height from the ground to the plane on the table should be 750 ±; the frequency range of the vibration sensor is 10～1000Hz; the mass of the vibration sensor should not exceed 50g. 6.4.2.2
Test procedure
Run at 90% of the highest sewing speed without load; the tension of the motor drive belt should ensure that the vibration of the machine head is in the most stable state; the sensor is magnetically attracted to the plane of the needle plate (see Figure 2); measurement direction: according to Figure 2;
Measure 3 times, and take the maximum value as the vibration displacement value, 6.4.3 Starting torque
According to ZBY17023.
Sensor
6.4.4 Lubrication and sealing
6.4.4.1 Test conditions
Run at 90% of the maximum sewing speed, no-load operation; run for 5s, stop for 5s, and run for 10min with the song. b.
6.4.4.2 Test procedures
Visually check the oil supply of the oil window;
Before the test, place a 120mmX50mm white paper on the needle plate surface. After the test, check that there should be no oil stains on the white paper; b.
Visually check that there should be no oil leakage at each joint and oil pan. c.
6.5 Accessories and spare parts
Accessories and spare parts should be counted one by one according to the instructions for use or the packing list, and the number should not be less than the specified number. 7 Inspection rules
7.1 Ex-factory products must be inspected and qualified by the enterprise's quality inspection department and be accompanied by an inspection certificate. There should be a continuous stitch seam sample under the presser foot, the size of the seam sample (L×b) is 120mm×50mm, see Figure 3. 7.2 Inspection classification 7.2.1 Factory inspection The consignee has the right to inspect and accept the factory inspection items according to the provisions of this standard. 7.2.2 Type inspection In the following cases, it is necessary to conduct a comprehensive assessment of product quality and type inspection: a. Trial design identification of new products or old products transferred to the factory for production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, the first inspection should be carried out periodically for six months of normal production; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Non-conforming categories and inspection categories
Inspection items, non-conforming categories and inspection categories are shown in Table 4. The sample unit is each sewing machine head, and the B category is counted as non-conforming products, and the C category is counted as the number of non-conforming products.
Appearance quality
Machine performance
Sewing performance
Inspection items
Non-conforming categories
Inspection categories
Running performance
Parts and spare parts
7.3 Factory inspection rules
7.3.1 Sample selection
Inspection items
Samples should be randomly selected from the inspection batch submitted. 7.3.2 Sampling plan and strictness
QB/T15151992
Continued Table 4
Unqualified categories
Inspection classification
The normal inspection single sampling plan is shown in Table 5, the determination of strictness and its transfer rules, and the single sampling plan after transfer shall comply with the provisions of GB/T2828.
7.3.3 Judgment of qualified or unqualified inspection batches According to the results of sample inspection, if the number of unqualified products of Class B and the number of unqualified products of Class C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), the inspection batch is judged to be a qualified batch. If the number of unqualified products of Class B and the number of unqualified products of Class C found in the sample are either greater than or equal to the corresponding unqualified judgment number (R.), the inspection batch is judged to be an unqualified batch. Table 5
Inspection level
Sample
Unqualified category
Unit sample inspection items
Acceptable quality level (AQL)
Batch range
1511200
Sample size code
7.3.4 Disposal of unqualified products and batches after inspection Sample size
The ordering party has the right to reject unqualified products found during inspection in qualified batches. S2
Normal inspection sampling
In principle, all batches judged as unqualified will be returned to the supplier or resolved by negotiation between the supplier and the ordering party. R
On the basis of 100% inspection of unqualified batches, the supplier will remove or repair the unqualified products found and allow them to be submitted for inspection again.
For the batches submitted for inspection again, whether to use normal inspection or strict inspection, whether to inspect all items or only the items that cause the batch to fail, shall be determined by the ordering party.
7.4 Rules for type inspection
7.4.1 Sample extraction
QB/T 1515—1992
Samples shall be extracted from a batch or several batches manufactured in this cycle and qualified by factory inspection, and the obtained samples shall be guaranteed to represent the manufacturing technology level of this cycle.
7.4.2 Sampling plan
The sub-sampling plan for type inspection is shown in Table 6. Table 6
Discrimination level
Sampling plan
Number of non-conforming items
Number of unit sample inspection items
Number of non-conforming quality level (RQL)
7.4.3 Judgment of pass or fail in type inspection B
According to the results of sample inspection, if the number of non-conforming products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), then the batch is judged to be a qualified batch. If the number of non-conforming products of category B and category C found in the sample is either greater than or equal to the corresponding non-conforming judgment number (R.), then the batch is judged to be a non-conforming batch. 7.4.4 Disposition after type inspection
Disposition after type inspection shall be in accordance with Article 4.12 of GB/T2829. 8. Labeling, packaging, transportation and storage
8.1 Labeling
The following labels shall be marked on the machine head:
Manufacturer name;
b. Trademark,
Product model or mark;
d. Manufacturing date or number.
8.2 Packaging, transportation and storage
According to the provisions of ZBY17004.
Additional remarks:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.1 Test conditions
QB/T 1515—1992
The test environment should not be affected by external vibration, temperature, humidity, airflow, noise, electromagnetic field, etc.; the machine head to be tested and the frame should be placed stably on a horizontal and solid ground, and the height from the ground to the plane on the table should be 750 ±; the frequency range of the vibration sensor is 10～1000Hz; the mass of the vibration sensor should not exceed 50g. 6.4.2.2
Test procedure
Run at 90% of the highest sewing speed without load; the tension of the motor drive belt should ensure that the vibration of the machine head is in the most stable state; the sensor is magnetically attracted to the plane of the needle plate (see Figure 2); measurement direction: according to Figure 2;
Measure 3 times, and take the maximum value as the vibration displacement value, 6.4.3 Starting torque
According to ZBY17023.
Sensor
6.4.4 Lubrication and sealing
6.4.4.1 Test conditions
Run at 90% of the maximum sewing speed, no-load operation; run for 5s, stop for 5s, and run for 10min with the song. b.
6.4.4.2 Test procedures
Visually check the oil supply of the oil window;
Before the test, place a 120mmX50mm white paper on the needle plate surface. After the test, check that there should be no oil stains on the white paper; b.
Visually check that there should be no oil leakage at each joint and oil pan. c.
6.5 Accessories and spare parts
Accessories and spare parts should be counted one by one according to the instructions for use or the packing list, and the number should not be less than the specified number. 7 Inspection rules
7.1 Ex-factory products must be inspected and qualified by the enterprise's quality inspection department and be accompanied by an inspection certificate. There should be a continuous stitch seam sample under the presser foot, the size of the seam sample (L×b) is 120mm×50mm, see Figure 3. 7.2 Inspection classification 7.2.1 Factory inspection The consignee has the right to inspect and accept the factory inspection items according to the provisions of this standard. 7.2.2 Type inspection In the following cases, it is necessary to conduct a comprehensive assessment of product quality and type inspection: a. Trial design identification of new products or old products transferred to the factory for production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, the first inspection should be carried out periodically for six months of normal production; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Non-conforming categories and inspection categories
Inspection items, non-conforming categories and inspection categories are shown in Table 4. The sample unit is each sewing machine head, and the B category is counted as non-conforming products, and the C category is counted as the number of non-conforming products.
Appearance quality
Machine performance
Sewing performance
Inspection items
Non-conforming categories
Inspection categories
Running performance
Parts and spare parts
7.3 Factory inspection rules
7.3.1 Sample selection
Inspection items
Samples should be randomly selected from the inspection batch submitted. 7.3.2 Sampling plan and strictness
QB/T15151992
Continued Table 4
Unqualified categories
Inspection classification
The normal inspection single sampling plan is shown in Table 5, the determination of strictness and its transfer rules, and the single sampling plan after transfer shall comply with the provisions of GB/T2828.
7.3.3 Judgment of qualified or unqualified inspection batches According to the results of sample inspection, if the number of unqualified products of Class B and the number of unqualified products of Class C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), the inspection batch is judged to be a qualified batch. If the number of unqualified products of Class B and the number of unqualified products of Class C found in the sample are either greater than or equal to the corresponding unqualified judgment number (R.), the inspection batch is judged to be an unqualified batch. Table 5
Inspection level
Sample
Unqualified category
Unit sample inspection items
Acceptable quality level (AQL)
Batch range
1511200
Sample size code
7.3.4 Disposal of unqualified products and batches after inspection Sample size
The ordering party has the right to reject unqualified products found during inspection in qualified batches. S2
Normal inspection sampling
In principle, all batches judged as unqualified will be returned to the supplier or resolved by negotiation between the supplier and the ordering party. R
On the basis of 100% inspection of unqualified batches, the supplier will remove or repair the unqualified products found and allow them to be submitted for inspection again.
For the batches submitted for inspection again, whether to use normal inspection or strict inspection, whether to inspect all items or only the items that cause the batch to fail, shall be determined by the ordering party.
7.4 Rules for type inspection
7.4.1 Sample extraction
QB/T 1515—1992
Samples shall be extracted from a batch or several batches manufactured in this cycle and qualified by factory inspection, and the obtained samples shall be guaranteed to represent the manufacturing technology level of this cycle.
7.4.2 Sampling plan
The sub-sampling plan for type inspection is shown in Table 6. Table 6
Discrimination level
Sampling plan
Number of non-conforming items
Number of unit sample inspection items
Number of non-conforming quality level (RQL)
7.4.3 Judgment of pass or fail in type inspection B
According to the results of sample inspection, if the number of non-conforming products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), then the batch is judged to be a qualified batch. If the number of non-conforming products of category B and category C found in the sample is either greater than or equal to the corresponding non-conforming judgment number (R.), then the batch is judged to be a non-conforming batch. 7.4.4 Disposition after type inspection
Disposition after type inspection shall be in accordance with Article 4.12 of GB/T2829. 8. Labeling, packaging, transportation and storage
8.1 Labeling
The following labels shall be marked on the machine head:
Manufacturer name;
b. Trademark,
Product model or mark;
d. Manufacturing date or number.
8.2 Packaging, transportation and storage
According to the provisions of ZBY17004.
Additional remarks:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.
Trial testing of new products or old products for transfer to factory production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, the normal production should be periodically inspected for six months; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Unqualified categories and inspection classifications
Inspection items, unqualified categories, and inspection classifications are shown in Table 4. The sample unit is each sewing machine head, and Class B is counted as unqualified products, and Class C is counted as the number of unqualified products.
Appearance quality
Machine performance
Sewing performance
Inspection items
Unqualified categories
Inspection categories
Operational performance
Parts and spare parts
7.3 Factory inspection rules
7.3.1 Sample extraction
Inspection items
Samples should be randomly selected from the inspection batch submitted. 7.3.2 Sampling plan and strictness
QB/T15151992
Continued Table 4
Unqualified categories
Inspection categories
Normal inspection The first sampling plan is shown in Table 5, the determination of strictness and its transfer rules, and the first sampling plan after transfer shall comply with the provisions of GB/T2828.
7.3.3 Judgment of qualified or unqualified inspection lot Based on the results of sample inspection, if the number of unqualified products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), the inspection lot is judged to be a qualified lot. If the number of unqualified products of category B and category C found in the sample is greater than or equal to the corresponding unqualified judgment number (R.), the inspection lot is judged to be an unqualified lot. Table 5
Inspection level
Sample
Unqualified category
Unit sample inspection items
Qualified quality level (AQL)
Batch invitation range
1511200
Sample size code
7.3.4 Disposal of unqualified products and lots after inspection Sample size
The ordering party has the right to reject unqualified products found during inspection in a qualified lot. S2
Normal inspection sampling
In principle, all unqualified batches will be returned to the supplier or resolved through negotiation between the supplier and the ordering party. R
On the basis of 100% inspection of unqualified batches, the supplier will remove or repair the unqualified products found and allow them to be submitted for inspection again.
For the batches submitted for inspection again, whether to use normal inspection or strict inspection, whether to inspect all items or only the items that cause the batch to be unqualified, are all decided by the ordering party.
7.4 Type inspection rules
7.4.1 Sample extraction
QB/T 1515—1992
Samples should be extracted from a batch or several batches manufactured in this cycle and qualified by factory inspection, and it should be ensured that the obtained samples can represent the manufacturing technology level of this cycle.
7.4.2 Sampling plan
The sampling plan for type inspection is shown in Table 6. Table 6
Discrimination level
Sampling plan
Unqualified category
Number of unit sample inspection items
Unqualified quality level (RQL)
7.4.3 Judgment of qualified or unqualified type inspection B
According to the results of sample inspection, if the number of unqualified products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), then the batch is judged to be a qualified batch. If the number of unqualified products of category B and category C found in the sample is either greater than or equal to the corresponding unqualified judgment number (R.), then the batch is judged to be an unqualified batch. 7.4.4 Disposal after type inspection
Disposal after type inspection shall be in accordance with Article 4.12 of GB/T2829. 8. Labeling, packaging, transportation and storage
8.1 Labeling
The following labels shall be marked on the machine head:
Manufacturer name;
b. Trademark,
Product model or mark;
d. Manufacturing date or number.
8.2 Packaging, transportation and storage
According to the provisions of ZBY17004.
Additional remarks:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.
Trial testing of new products or old products for transfer to factory production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, the normal production should be periodically inspected for six months; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Unqualified categories and inspection classifications
Inspection items, unqualified categories, and inspection classifications are shown in Table 4. The sample unit is each sewing machine head, and Class B is counted as unqualified products, and Class C is counted as the number of unqualified products.
Appearance quality
Machine performance
Sewing performance
Inspection items
Unqualified categories
Inspection categories
Operational performance
Parts and spare parts
7.3 Factory inspection rules
7.3.1 Sample extraction
Inspection items
Samples should be randomly selected from the inspection batch submitted. 7.3.2 Sampling plan and strictness
QB/T15151992
Continued Table 4
Unqualified categories
Inspection categories
Normal inspection The first sampling plan is shown in Table 5, the determination of strictness and its transfer rules, and the first sampling plan after transfer shall comply with the provisions of GB/T2828.
7.3.3 Judgment of qualified or unqualified inspection lot Based on the results of sample inspection, if the number of unqualified products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), the inspection lot is judged to be a qualified lot. If the number of unqualified products of category B and category C found in the sample is greater than or equal to the corresponding unqualified judgment number (R.), the inspection lot is judged to be an unqualified lot. Table 5
Inspection level
Sample
Unqualified category
Unit sample inspection items
Qualified quality level (AQL)
Batch invitation range
1511200
Sample size code
7.3.4 Disposal of unqualified products and lots after inspection Sample size
The ordering party has the right to reject unqualified products found during inspection in a qualified lot. S2
Normal inspection sampling
In principle, all unqualified batches will be returned to the supplier or resolved through negotiation between the supplier and the ordering party. R
On the basis of 100% inspection of unqualified batches, the supplier will remove or repair the unqualified products found and allow them to be submitted for inspection again.
For the batches submitted for inspection again, whether to use normal inspection or strict inspection, whether to inspect all items or only the items that cause the batch to be unqualified, are all decided by the ordering party.
7.4 Type inspection rules
7.4.1 Sample extraction
QB/T 1515—1992
Samples should be extracted from a batch or several batches manufactured in this cycle and qualified by factory inspection, and it should be ensured that the obtained samples can represent the manufacturing technology level of this cycle.
7.4.2 Sampling plan
The sampling plan for type inspection is shown in Table 6. Table 6
Discrimination level
Sampling plan
Unqualified category
Number of unit sample inspection items
Unqualified quality level (RQL)
7.4.3 Judgment of qualified or unqualified type inspection B
According to the results of sample inspection, if the number of unqualified products of category B and category C found in the sample are both less than or equal to the corresponding qualified judgment number (A.), then the batch is judged to be a qualified batch. If the number of unqualified products of category B and category C found in the sample is either greater than or equal to the corresponding unqualified judgment number (R.), then the batch is judged to be an unqualified batch. 7.4.4 Disposal after type inspection
Disposal after type inspection shall be in accordance with Article 4.12 of GB/T2829. 8. Labeling, packaging, transportation and storage
8.1 Labeling
The following labels shall be marked on the machine head:
Manufacturer name;
b. Trademark,
Product model or mark;
d. Manufacturing date or number.
8.2 Packaging, transportation and storage bzxz.net
According to the provisions of ZBY17004.
Additional remarks:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.2 Packaging, transportation and storage
According to ZBY17004.
Additional remarks:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.2 Packaging, transportation and storage
According to ZBY17004.
Additional remarks:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. This standard was drafted by Shanghai Sewing Machine Factory No. 4. The main drafter of this standard is Jin Shunde.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.