Some standard content:
Light Industry Industry Standard of the People's Republic of China
Embroidery Machine Head
Industrial Sewing Machine
Subject Content and Scope of Application
QB/T 1577—1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of embroidery machine heads. This standard applies to embroidery machine heads (hereinafter referred to as "heads") for sewing thin and medium-thick sewing products. 2 Referenced Standards
GB/T 2828
GB/T 2829
GB/T4515
QB/T 1177
QB/T 1178
ZBY 17004
ZBY 17023
3 Product classification
3.1 Type
Counting sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches)Counting sampling procedure and sampling table for periodic inspection (applicable to inspection of stability of production process)Classification and terminology of stitches
Test method for noise level of industrial sewing machines
Test method for vibration of industrial sewing machines
Marking, packaging, transportation and storage of sewing machinesTest method for starting torque of machine head
Sewing machinebZxz.net
This machine is a flat-plate body, with connecting rod thread take-up, horizontal rotary hook thread hook, manual feeding, and forming 301 and 304 stitches (GB/T4515). 3.2 Basic parameters
a. Maximum sewing speed: not less than 1700 stitches/min; b. Maximum stitch width: not less than 10mm; c. Needle: GCX1 type (SINGER16×231) NM65～~90; d. Thread: 9.5~7.5tex/3~4 (60~80s/3~4) cotton thread, 19.5~18tex/2 (30~32/2) cotton embroidery thread or similar silk thread;
e. Motor power: 200~270W. 3.3 The installation dimensions of the base plate should comply with the requirements of Table 1. Table 1
Rounded corners where length and width meet
4 Technical requirements
4.1 Appearance quality
Basic dimensions
Left end to hinge hole
Hinge hole distance
Basic dimensions
4.1.1 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 bumping. Approved by the Ministry of Light Industry of the People's Republic of China on August 31, 1992266
Implementation on April 1, 1993
QB/T1577-1992
4.1.2 There should be no rust or stains on the surface of the machine head, and the label should be complete and correctly positioned without obvious scratches. 4.1.3 The surface of the electroplated layer of the electroplated part should be flat, smooth and uniform in color, and there should be no defects such as missing plating, peeling, spots, scratches and rust. 4.1.4 The surface of the blackened parts should be uniform in color and should not have spots, sediments, mottled spots or scratches. 4.1.5 There should be no burrs on the exposed parts of the machine head and the screw heads. 4.2 Machine performance
4.2.1 The maximum sewing speed should not be less than 1700 stitches/min. 4.2.2 The maximum stitch width should not be shorter than 10mm, and the stitch width should be adjustable. 4.2.3 The tension of the needle thread and shuttle thread should be adjustable. 4.2.4 The needle plate should be easy to disassemble and assemble, and there should be no loose wall in the plane direction after installation. 4.2.5 Under the condition of maximum stitch width, the symmetry error of the left and right stitches to the needle base point when the stitch width is zero should not be greater than 0.5mm.
4.2.6 When the stitch width is zero, the needle displacement relative to the needle base point should not be greater than 0.2mm. 4.3 Sewing performance
Under the conditions specified in Table 2, the sewing performance shall meet the following requirements: a. There shall be no needle breakage, thread breakage or stitch skipping; b. The shuttle thread shall not be exposed above the sewing material.
4.4 Running performance
4.4.1 Running sound
a When running continuously at the maximum speed, there shall be no abnormal noise; b. The noise sound pressure level shall not exceed 81dB (A). 4.4.2 The vibration displacement shall not exceed 300 mm
4.4.3 The starting torque shall not exceed 0.5 Nm. 4.5 Accessories and spare parts
Each machine head shall be accompanied by an instruction manual and accessories and spare parts. The variety and quantity of accessories and spare parts shall comply with the provisions of the instruction manual or packing list.
5 Test methods
5.1 Appearance quality
The appearance quality specified in Article 4.1 of this standard shall be determined by visual inspection at a distance of 300mm under natural light with an illumination of 600±2001x.
5.2 Machine performance
5.2.1 The maximum sewing speed specified in Article 4.2.1 of this standard shall be measured by a photoelectric tachometer or other non-contact tachometer. 5.2.2 The maximum stitch width and stitch width adjustment specified in Article 4.2.2 of this standard shall be tested in the sewing performance test specified in Table 2. 5.2.3 The tension adjustment of the needle thread and shuttle thread specified in Article 4.2.3 of this standard shall be tested in the sewing performance test specified in Table 2. 5.2.4 The requirements for disassembly and installation of the needle plate specified in Article 4.2.4 of this standard may be determined by touch and visual inspection. 5.2.5 The symmetric error of the left and right stitches to the needle base point specified in Article 4.2.5 of this standard shall be tested in the following way: a. Use 130g/m2 woodfree paper for puncture test; b. Adjust the width between stitches to the minimum and puncture the needle base point stitch;. Adjust the magic between stitches to the maximum and puncture the left and right stitches respectively! Use a vernier caliper to measure the crab value of the left and right stitches to the needle base point stitch; e. Subtract the two values to get the symmetry error. 5.2.6 The needle displacement specified in Article 4.2.6 of this standard shall be tested in the following way: a. Adjust the width between stitches to the minimum and make the needle bar at the upper limit position; 267
QB/T1577-1992
b. Use a dial indicator with a blade-type contact to measure on the needle bar at a distance of 56mm from the needle plate plane; c. Turn the upper wheel, and the needle bar will drop to the point where the needle tip is 3mm from the needle plate plane. Record the reading in the table, and then continue to turn the upper wheel. Take the difference in the movement of the needle bar dropping to the lower limit position and then rising to the point where the needle tip is 3mm from the needle plate plane; d. Test three times in a row according to the above method, and take the maximum difference as the needle displacement. 5.3 Sewing performance
The sewing performance specified in Article 4.3 of this standard shall be tested under the conditions specified in Table 2. Table 2
Test Items
Sea-material Embroidery
Medium-thick Material Embroidery
Maximum Stitch Width
7. 5tex/2X2
(80s/2×2)Cotton Thread
Note: A stretcher is used in the test.
5.4 Running Performance
11207 Electric Spinning
605～611 Yarn
130 Zhonghu Cloth
Stitch Length
Manual Tight Sewing
5.4.1No abnormal noise as specified in 4.4.1a of this standard shall be determined by ear. Stitch Width
(Shuttle Pattern)
5.4.2Noise sound pressure level as specified in 4.4.1b of this standard shall be tested in accordance with the provisions of QB/T1177. 5.4.3 The vibration displacement specified in Article 4.4.2 of this standard shall be tested in accordance with the provisions of QB/T1178. 5.4.4 The starting torque specified in Article 4.4.3 of this standard shall be tested in accordance with the provisions of ZBY17023. 5.5 Accessories and spare parts
Accessories and spare parts shall be checked item by item according to the provisions of the instruction manual or packing list, and shall not be less than the specified number. 6 Inspection rules
Cumulative test length of sewing speed
Needle min
6.1 Each machine head leaving the factory must be inspected and qualified by the quality inspection department of the manufacturer and accompanied by an inspection certificate before leaving the factory. 6.2 Inspection classification
Product inspection is divided into factory inspection and type inspection. 6.2.1 Factory inspection
When the product is delivered, the consignee has the right to inspect and accept it according to the factory inspection items specified in this standard. 6.2.2 Type Inspection
In any of the following situations, a comprehensive assessment of product quality is required and a type inspection should be conducted: a. Trial design 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 that may affect product performance; c. Periodic inspection should be conducted every six months during normal production; d. When the product is resumed after a long period of suspension; e. When there is a significant difference between the factory inspection results and the last type inspection; f. When the superior quality supervision agency proposes a requirement for type inspection. 6.2.3 Inspection items, unqualified categories, inspection classification mm
500 each
Inspection items, unqualified categories, inspection classification shall be as specified in Table 3. Unit product is calculated by each machine head, A and B categories are calculated by unqualified products, and C category is calculated by the number of unqualified products.
Appearance quality
Machine performance
Sewing performance
Running performance
Accessories and spare parts
6.3 Factory inspection rules
6.3.1 Sample selection
Inspection items
QB/T1577---1992
Unqualified categories
Embroidery for thin materials
Embroidery for medium and thick materials
Maximum stitch width
Samples shall be randomly selected from the inspection batch submitted. 6.3.2 Sampling plan and strictness
Inspection classification
The normal inspection single sampling plan is shown in Table 4. The determination of strictness and its transfer rules shall be in accordance with the provisions of GB/T2828. Table 4
Inspection level
Sampling plan
Non-conforming classification
Unit sample inspection items
Qualified quality level AQL
Batch range
1~25
26~150
151~1200
Sample size code
6.3.3 Sample size for judging whether a batch is qualified or unqualified
Normal inspection set one-time sampling
One type
QB/T 1577--1992
According to the results of sample inspection, if the number of non-conforming products of categories A and B and the number of non-conforming products of category C found in the sample are respectively less than or equal to the corresponding qualified judgment number A., then the inspection batch is judged to be a qualified batch. If the number of unqualified products of categories A and B and the number of unqualified products of category C found in the sample is greater than or equal to the corresponding unqualified judgment number R, the inspection batch is judged to be an unqualified batch. 6.3.4 Disposal of unqualified products and batches after inspection The ordering party has the right to reject unqualified products found during inspection in qualified batches. In principle, all batches judged to be unqualified shall be returned to the supplier or resolved by negotiation between the supplier and the ordering party. On the basis of 100% inspection of unqualified batches, the supplier shall 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 check all items or only the items that cause the batch to be unqualified, are all decided by the ordering party.
6.4 Type inspection rules
6.4.1 Sample extraction
Samples should be extracted from a batch or batches manufactured in this cycle and passed the factory inspection, and it is necessary to ensure that the obtained samples can represent the manufacturing technology level of this cycle.
6.4.2 Sampling plan
The secondary sampling plan for type inspection is shown in Table 5. When sampling, all samples must be taken at the same time. Table 5
Discrimination level
Sampling plan
Non-conforming classification
Number of unit sample inspection items
Non-conforming quality level (RQL)
Sample size
6.4.3 Judgment Ae of pass or fail in type inspection
Second sampling
According to the results of sample inspection, if the number of non-conforming products of Class A and Class B and the number of non-conforming products of Class C found in the first sample are respectively less than or equal to the corresponding first qualified judgment number A, then the type inspection is judged to be qualified. If the number of unqualified products of categories A and B and the number of unqualified products of categories C found in the sample is greater than or equal to the corresponding first unqualified judgment number R., the type inspection is judged to be unqualified. If the number of unqualified products or the number of unqualified products found in the first sample is greater than the corresponding first qualified judgment number A, and at the same time less than the corresponding first unqualified judgment number R, a second sample is drawn for inspection. If the sum of the number of unqualified products of category A, the sum of the number of unqualified products of category B, and the sum of the number of unqualified products of category C found in the first and second samples are respectively less than or equal to the corresponding second qualified judgment number A., the type inspection is judged to be qualified. If the sum of the number of unqualified products of category A or category B or the sum of the number of unqualified products of category C found in the first and second samples is greater than or equal to the corresponding second unqualified judgment number R., the type inspection is judged to be qualified. 6.4.4 Disposal after type inspection
Disposal after type inspection shall comply with Article 4.12 of GB/T2829. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Product marking
The following markings shall be marked on the machine head:
Group, manufacturer name:
Beautiful trademark;
Heart. Product model or logo;
d, manufacturing date (or number) or production batch number. 7.1.2 Outer packaging marking
Comply with the provisions of ZBY17004.
Packaging, transportation and storage
Comply with the provisions of ZBY17004.
Additional remarks:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. QB/T 15771992
This standard is under the jurisdiction of the National Sewing Machine Standard Promotion Center. This standard was drafted by Shanghai Sewing Machine Factory No. 1, Wuhan Garment Machinery Factory, Shanghai Xiechang Sewing Machine Factory, and State-owned No. 513 Factory. The main drafters of this standard are Wang Yonghua, Ma Zhuangqing, Chen Jialian, and He Gang. 2713 Judgment of whether type inspection is qualified or unqualified Ae
Second sampling
Based on the results of sample inspection, if the number of unqualified products of Class A and Class B and the number of unqualified products of Class C found in the first sample are respectively less than or equal to the corresponding first qualified judgment number A, then the type inspection is judged to be qualified. If the number of unqualified products of categories A and B and the number of unqualified products of categories C found in the sample is greater than or equal to the corresponding first unqualified judgment number R., the type inspection is judged to be unqualified. If the number of unqualified products or the number of unqualified products found in the first sample is greater than the corresponding first qualified judgment number A, and at the same time less than the corresponding first unqualified judgment number R, a second sample is drawn for inspection. If the sum of the number of unqualified products of category A, the sum of the number of unqualified products of category B, and the sum of the number of unqualified products of category C found in the first and second samples are respectively less than or equal to the corresponding second qualified judgment number A., the type inspection is judged to be qualified. If the sum of the number of unqualified products of category A or category B or the sum of the number of unqualified products of category C found in the first and second samples is greater than or equal to the corresponding second unqualified judgment number R., the type inspection is judged to be qualified. 6.4.4 Disposal after type inspection
Disposal after type inspection shall comply with Article 4.12 of GB/T2829. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Product marking
The following markings shall be marked on the machine head:
Group, manufacturer name:
Beautiful trademark;
Heart. Product model or logo;
d, manufacturing date (or number) or production batch number. 7.1.2 Outer packaging marking
Comply with the provisions of ZBY17004.
Packaging, transportation and storage
Comply with the provisions of ZBY17004.
Additional remarks:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. QB/T 15771992
This standard is under the jurisdiction of the National Sewing Machine Standard Promotion Center. This standard was drafted by Shanghai Sewing Machine Factory No. 1, Wuhan Garment Machinery Factory, Shanghai Xiechang Sewing Machine Factory, and State-owned No. 513 Factory. The main drafters of this standard are Wang Yonghua, Ma Zhuangqing, Chen Jialian, and He Gang. 2713 Judgment of whether type inspection is qualified or unqualified Ae
Second sampling
Based on the results of sample inspection, if the number of unqualified products of Class A and Class B and the number of unqualified products of Class C found in the first sample are respectively less than or equal to the corresponding first qualified judgment number A, then the type inspection is judged to be qualified. If the number of unqualified products of categories A and B and the number of unqualified products of categories C found in the sample is greater than or equal to the corresponding first unqualified judgment number R., the type inspection is judged to be unqualified. If the number of unqualified products or the number of unqualified products found in the first sample is greater than the corresponding first qualified judgment number A, and at the same time less than the corresponding first unqualified judgment number R, a second sample is drawn for inspection. If the sum of the number of unqualified products of category A, the sum of the number of unqualified products of category B, and the sum of the number of unqualified products of category C found in the first and second samples are respectively less than or equal to the corresponding second qualified judgment number A., the type inspection is judged to be qualified. If the sum of the number of unqualified products of category A or category B or the sum of the number of unqualified products of category C found in the first and second samples is greater than or equal to the corresponding second unqualified judgment number R., the type inspection is judged to be qualified. 6.4.4 Disposal after type inspection
Disposal after type inspection shall comply with Article 4.12 of GB/T2829. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Product marking
The following markings shall be marked on the machine head:
Group, manufacturer name:
Beautiful trademark;
Heart. Product model or logo;
d, manufacturing date (or number) or production batch number. 7.1.2 Outer packaging marking
Comply with the provisions of ZBY17004.
Packaging, transportation and storage
Comply with the provisions of ZBY17004.
Additional remarks:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. QB/T 15771992
This standard is under the jurisdiction of the National Sewing Machine Standard Promotion Center. This standard was drafted by Shanghai Sewing Machine Factory No. 1, Wuhan Garment Machinery Factory, Shanghai Xiechang Sewing Machine Factory, and State-owned No. 513 Factory. The main drafters of this standard are Wang Yonghua, Ma Zhuangqing, Chen Jialian, and He Gang. 271
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.