Some standard content:
JB/T 8930--1999
This standard is a quality control standard for stamping parts production, which is developed around total quality management, gathers my country's many years of production experience, and refers to ISO9000 cluster standards.
Appendix A of this standard is a prompt appendix.
This standard is proposed and managed by the Quankuang Forging Standardization Technical Committee. The drafting units of this standard are: China First Tractor Group Corporation, Beijing Electromechanical Research Institute, Xiyi Group Corporation and China First Automobile Group Corporation. The main drafters of this standard are: Shi Dingyong, Cai Fulin, Zhao Xinhuai, Yu Jiang, Zhu Jing, Wang Wenhui. 201
1 Scope
Standards of the Machinery Industry of the People's Republic of China
Specification quality of control of stamping process
Specification quality of control of stamping process This standard specifies the general principles and requirements for the whole process quality control of stamping process. This standard applies to the stamping process quality control of stamping parts production. 2 Reference standards
JB/T89301999
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the version shown is effective. All standards will be revised. The parties using this standard should explore the possibility of using the latest version of the following standards GB/T8176·--1997 General Rules for Safety Production in Stamping Shops JB/T6056---1992 Guidelines for Environmental Protection in Stamping Shops 3 Design control of products, processes and molds
3.1 Product design
Product design should comply with the requirements of stamping processability and relevant technical standards (see Appendix A (suggested appendix). If necessary, the opinions of stamping process personnel should be sought, and the product drawings and processes should be signed. 3.2 Art design
3.2.1 When the process personnel prepare the stamping process, they must first review the product drawings (or evaluate). If necessary, the design, process, production, mold and other related personnel should be organized for review. If necessary, process experiments should be carried out. 3.2.2 The process design should be proofread, reviewed, and approved according to the relevant documents. If necessary, the process should be countersigned. 3.2.3 The process design should be based on the actual situation of the enterprise. While ensuring the quality reliability, the advancement, economy and safety of the process should be fully considered.
3.3 Mold design
3.3.1 The main basis for mold design is product drawings (including master models, data models), process cards, and relevant technical standards. 3.3.2 Mold design must go through proofreading, review, countersigning, and approval procedures. 3.3.3 Mold design must be countersigned by process personnel and standardization auditors. If necessary, it should be countersigned by mold manufacturing and maintenance personnel: 3.3.4 Mold design must ensure that the stamping parts meet the requirements of product drawings and process dimensions, have reliable positioning, stable quality, good safety, convenient operation, easy manufacturing and maintenance, and can meet the life requirements of economic batches. 4 Document and data control
4.1 Necessary technical documents
Stamping parts production-generally should have product part drawings, rough drawings, process routes, process cards (including material preparation cards), material consumption process quotas, labor time quotas, mold drawings, mold installation drawings, tooling lists, equipment specifications, operation instructions, process regulations, stamping parts inspection instructions and related standards and other technical documents.
4.2 Technical document requirements
Approved by the State Machinery Industry Bureau on June 24, 1999, 202
Implemented on January 1, 2000
JB/T8930--1999
4.2.1 Technical documents should be accurate, concise and meet the requirements of standardization. Various technical documents must be correct, complete and unified. 4.2.2 All technical documents shall be approved and signed in accordance with the prescribed procedures before they can take effect. Changes to technical documents should be made in accordance with the change regulations and approval procedures. The relevant documents must be changed and signed accordingly, and written records should be kept. 4.2.3 All technical documents should be classified and archived according to the technical document archive management system. 4.3 Original records
Original records such as process parameters and test reports involved in this standard should be read and archived. Generally, they should be kept for 110 years. If necessary, they should be kept until the product stops production.
5 Environmental control
5.1 The working environment of the stamping plant includes the floor of the factory, skylights, temperature, ventilation, dust prevention, lighting, noise, passages, pipelines, and the storage of sheet materials, bad stamping parts and work clamps and dies. The specific requirements of the enterprise should be formulated and implemented in accordance with the requirements of GB/T8176, JB/T6056 and relevant national laws and regulations.
5.2 The production site of the stamping plant should have a fixed management map according to the requirements of 5.1, and there should be corresponding management and assessment systems. 6 Equipment, Instruments and Tooling Control
6.1 Equipment Instruments
6.1.1 All types of equipment instruments must be in good condition and have operating procedures and maintenance and verification systems. 6.1.2 All types of major equipment in use must be hung with good equipment signs and undergo regular maintenance and inspection. Unqualified equipment must be hung with a "disabled sign". 6.1.3 The control system and detection and display instruments of the equipment should be checked regularly and have a certificate of qualification to ensure the accuracy of the instruments and displayed values. 6.1.4 All equipment used must be archived, and the specific contents include: a) Equipment instruction manual;
b) Machine time record;
c) Fault record;
d) Repair record.
6.2 Molds and other tooling
6.2.1 New molds should be manufactured according to the requirements of the mold drawings, and after passing the inspection, they should be manufactured and debugged. Only after the manufacturing and debugging are qualified can production debugging be carried out; when the quality of the stamping parts meets the product drawings and process requirements, they can be put into production. The factory should have a new mold ordering, inspection and debugging management system. 6.2.2 In each batch At the end of stamping parts production, the mold can be put into storage and continue to be used only after the inspector has inspected the final parts and found them to be qualified. Otherwise, the mold and the unfinished parts should be sent to the repair station for repair and qualified before they can be put into storage. For the repaired mold, necessary debugging should be arranged before production, and the factory should implement a work record system for mold use.
6.2.3 Testing instruments for stamping parts, including inspection tools, templates, gauges and standard measuring tools, must have a regular calibration system, as well as relevant management regulations and records for storage, maintenance and reporting of damage.
6.2.4 Safety equipment used in stamping production must be selected according to the process regulations and inspected regularly. Establish corresponding management, use and repair systems 6.2.5 A "mold resume" must be established for each set of molds, and a strict mold management system and mold maintenance system must be established. 7 Control of raw materials
7.1 The raw materials used for stamping parts should have a quality certificate and meet the material brand, specification, size and performance requirements specified in the product drawings and process documents.
7.2 There should be a procurement control procedure for raw materials, and there should be a procurement contract approval procedure and technical agreement requirements for raw material procurement. 7.3 The factory should establish a re-inspection system for incoming raw materials. Important raw materials should be re-inspected by brand and furnace number, and be accompanied by a re-inspection qualified report and re-inspection mark. Unqualified materials should be clearly marked. Qualified materials and unqualified materials should be stored in separate areas, and mixing is strictly prohibited. 7.4 When using substitute materials, the procedures should be handled in accordance with the material substitution system. In principle, substitution is not allowed for important stamping parts. When substitution is necessary, corresponding remedial measures should be taken to prevent quality accidents. 203
8 Process Control
8.1 Cutting (cutting by shearing)
JB/T8930-1999
8.1.1 Before cutting, the material brand, state, specification, size, quantity, surface quality, plate flatness, fiber direction and other technical requirements should be verified according to the stamping process card or the material preparation sequence card. If necessary, the material re-inspection grid mark should also be checked; if the material is substituted, the substitution procedure must be checked.
8.1.2 The dimensional tolerance, cross-sectional quality and burr height of the rough material shall be checked according to the process regulations and relevant technical standards. 8.1.3 During the cutting process, if the rough material has visible defects such as warping, distortion, interlayer and surface rust, it should be reported to the inspection personnel or process personnel in time, and the work can be continued after processing. 8.1.4 The unfinished and finished pieces should be marked, the quantity recorded, and placed separately. The part number and material brand should be written on each pile of unfinished pieces to avoid mixing.
8.1.5 The unfinished pieces must not be scratched or dented. During processing, storage and transportation, effective protective measures should be taken for punching parts with high surface quality requirements. 8.2 Pretreatment.1.
8.2.1 Before stamping, hot-rolled sheets, profiles, annealed unfinished rings and semi-finished parts should be pickled or subjected to other pretreatment procedures if necessary. 8.2.2 The corresponding pretreatment process regulations and quality inspection system should be strictly followed during pretreatment. 8.3 Stamping
8.3.1 The stamping process should be carried out on the equipment specified in the process documents or on substitute equipment. When using substitute equipment, the equipment substitution procedures must be completed. 8.3.2 Stamping operators should be familiar with the stamping process documents, product drawings and self-inspection contents of this process. 8.3.3 Before the operator operates, he must strictly check whether the press is operating normally, whether the lubrication is good, whether the mold is installed correctly and firmly, and whether the mold is in good condition. Wear labor protection equipment and use safety devices correctly. 8.3.4 Select suitable lubricants according to process regulations. Lubricants should be kept clean and not deteriorated, and the correct application method should be used. 8.3.5 Before production, the material brand and size specifications should be checked according to the process documents to prevent material leakage and mixing during transportation. 8.3.6 During stamping, it must be checked according to the inspection system, and it can only be put into production after passing the inspection. 8.3.7 Stamping parts should be stored on special or general workstations and equipment, and waste materials and reusable waste materials should be placed separately. 8.3.8 If any parts are found to be unqualified after inspection, production should be stopped immediately and handled according to the unqualified parts handling procedure. 8.4 Stamping Supplementary Process
8.4.1 The surface treatment of stamped parts that require sandblasting, shot blasting, tumbling, pickling, and phosphating should be carried out in accordance with the relevant process documents. The surface quality after treatment should meet the quality requirements of special process technical documents. 8.4.2 The heat treatment, machining, painting and other processes after the stamping process shall be carried out in accordance with the relevant provisions of the process documents. 8.4.3 Stamped parts should be rust-proofed as required during storage or shipment, and the factory should have process documents and management assessment systems for parts rust prevention.
8.4.4 The packaging of stamped parts should be carried out according to special packaging.T. technology, and the packaging quality should meet the quality requirements of relevant documents. 8.5 Stamping Parts Inspection
8.5.17 Process Inspection
8.5.1.1.1. The factory must have a product quality inspection system. 8.5.1.2 The inspectors must conduct the first piece inspection for each batch, each shift, each time the mold and personnel are changed, and the products can be put into production only after they are qualified. During production, the inspection frequency specified in the process documents shall be strictly followed to conduct patrol inspections and monitor the quality changes of stamping parts; at the end of the production process, the final piece inspection shall be carried out. All inspections shall be recorded and accounted for. 8.5.1.3 During the process, the production workers shall conduct the first piece inspection, process self-inspection, and sequence mutual inspection to ensure product quality. 8.5.1.4 After the stamping process is qualified, the inspector shall sign on the inspection card before transferring to the next process. 8.5.2 Final inspection of stamping parts
8.5.2.1 Final inspection of stamping parts shall be carried out in accordance with the relevant provisions of product drawings, process documents, relevant standards or contracts, etc. 8.5.2.2 After the final inspection is passed, the inspection mark (or label) should be stamped on the specified part of the stamping part, or other marks should be made: 204
JB/T 8930--1999
8.5.2.3 The factory should have a management method for product identification and traceability control procedures. The corresponding identification list, location and requirements should be established, and records should be kept.
8.5.2.4 Qualified products
The certificate of conformity should be filled out by the inspection department in accordance with the relevant technical documents and technical standards or contract requirements. When the inspection confirms that the parts are qualified, the stamping parts certificate of conformity shall be issued, or a qualified mark shall be made. 8.5.2.5 Unqualified products
After the inspection by the inspection department, the parts that are confirmed to be unqualified should be filled out with a notification form. The parts should be marked, stored in isolation, and the unqualified product handling organization of the quality assurance system should be notified to handle them according to the unqualified product handling procedures. 8.6 Comprehensive management of the production process
8.6.1 The factory should have a production plan preparation and management control system, and should achieve planned balanced production to ensure the completion of the plan. 8.6.2 The factory should establish detailed rules for production site management, achieve on-site fixed-location management, and civilized production. There should be on-site management assessment records. 8.6.3 The factory should strictly implement process discipline, and should establish on-site process discipline inspection and management methods, conduct regular inspections of on-site process discipline, and establish process discipline inspection and assessment records. 8.6.4 Verify the process from time to time, especially the parts of new products and key parts with many problems and complexities. A process verification report system should be established. 8.6.5 The quality management point method should be promoted for key processes and key processes, and the quality management point should have an operation instruction and data record.
8.6.6 When non-conforming products need to be repaired, reworked, or accepted with concessions, the factory should have a management system for non-conforming products. Defective products should have review records, rework and repair records, product concession applications, return orders, scrap orders and other documents. 8.6.7 In order to prevent the recurrence of defective products, the factory should have a corrective and preventive measures control procedure. A product corrective and preventive measures verification method and a product quality improvement and research management method should be established. There should be measures such as product quality audit and rectification notice. 8.6.8 The factory should stipulate a regular or irregular product quality scheduling meeting system. At the meeting, major problems in production will be solved, quality assessment results will be announced, and quality research and quality rectification plans will be studied. 8.6.9 The factory should have product handling, storage, packaging, protection, and delivery procedures, and corresponding systems to ensure that parts are intact and prevent quality problems such as bumps and damage, rust, and mixing. 9 Quality Information Feedback Management
9.1 When quality problems are found during the production process, production should be stopped immediately and analysis should be organized in a timely manner to find out the causes, implement responsibilities, and propose treatment methods or improvement measures. Production can only be carried out after production verification and confirmation of qualification. 9.2 During the production process, various factors that affect product quality can be fed back through the information management system, and relevant units can be supervised to solve them and establish a quality accident analysis table.
9.3 Regularly visit users (or the next process), and promptly study and handle the opinions and feedback information raised during the visit. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping parts
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method3.8 If any part is found unqualified after inspection, production shall be stopped immediately and the unqualified parts handling procedure shall be followed. 8.4 Stamping Supplementary Process
8.4.1 The surface treatment of stamped parts that require sandblasting, shot blasting, tumbling, pickling, and phosphating shall be carried out in accordance with the relevant process documents. The surface quality after treatment shall meet the quality requirements of special process technical documents. 8.4.2 The heat treatment, machining, painting and other processes after the stamping process shall be carried out in accordance with the relevant provisions of the process documents. 8.4.3 Stamped parts shall be treated with rust prevention as required during storage or shipment, and the factory shall have process documents and management assessment systems for parts rust prevention.
8.4.4 The packaging of stamped parts shall be carried out according to special packaging technology, and the packaging quality shall meet the quality requirements of relevant documents. 8.5 Stamping Parts Inspection
8.5.17 Process Inspection
8.5.1.1.1. The factory must have a product quality inspection system. 8.5.1.2 The inspectors must conduct the first piece inspection for each batch, each shift, each time the mold and personnel are changed, and the products can be put into production only after they are qualified. During production, the inspection frequency specified in the process documents shall be strictly followed to conduct patrol inspections and monitor the quality changes of stamping parts; at the end of the production process, the final piece inspection shall be carried out. All inspections shall be recorded and accounted for. 8.5.1.3 During the process, the production workers shall conduct the first piece inspection, process self-inspection, and sequence mutual inspection to ensure product quality. 8.5.1.4 After the stamping process is qualified, the inspector shall sign on the inspection card before transferring to the next process. 8.5.2 Final inspection of stamping parts
8.5.2.1 Final inspection of stamping parts shall be carried out in accordance with the relevant provisions of product drawings, process documents, relevant standards or contracts, etc. 8.5.2.2 After the final inspection is passed, the inspection mark (or label) should be stamped on the specified part of the stamping part, or other marks should be made: 204
JB/T 8930--1999
8.5.2.3 The factory should have a management method for product identification and traceability control procedures. The corresponding identification list, location and requirements should be established, and records should be kept.
8.5.2.4 Qualified products
The certificate of conformity should be filled out by the inspection department in accordance with the relevant technical documents and technical standards or contract requirements. When the inspection confirms that the parts are qualified, the stamping parts certificate of conformity shall be issued, or a qualified mark shall be made. 8.5.2.5 Unqualified products
After the inspection by the inspection department, the parts that are confirmed to be unqualified should be filled out with a notification form. The parts should be marked, stored in isolation, and the unqualified product handling organization of the quality assurance system should be notified to handle them according to the unqualified product handling procedures. 8.6 Comprehensive management of the production process
8.6.1 The factory should have a production plan preparation and management control system, and should achieve planned balanced production to ensure the completion of the plan. 8.6.2 The factory should establish detailed rules for production site management, achieve on-site fixed-location management, and civilized production. There should be on-site management assessment records. 8.6.3 The factory should strictly implement process discipline, and should establish on-site process discipline inspection and management methods, conduct regular inspections of on-site process discipline, and establish process discipline inspection and assessment records. 8.6.4 Verify the process from time to time, especially the parts of new products and key parts with many problems and complexities. A process verification report system should be established. 8.6.5 The quality management point method should be promoted for key processes and key processes, and the quality management point should have an operation instruction and data record.
8.6.6 When non-conforming products need to be repaired, reworked, or accepted with concessions, the factory should have a management system for non-conforming products. Defective products should have review records, rework and repair records, product concession applications, return orders, scrap orders and other documents. 8.6.7 In order to prevent the recurrence of defective products, the factory should have a corrective and preventive measures control procedure. A product corrective and preventive measures verification method and a product quality improvement and research management method should be established. There should be measures such as product quality audit and rectification notice. 8.6.8 The factory should stipulate a regular or irregular product quality scheduling meeting system. At the meeting, major problems in production will be solved, quality assessment results will be announced, and quality research and quality rectification plans will be studied. 8.6.9 The factory should have product handling, storage, packaging, protection, and delivery procedures, and corresponding systems to ensure that parts are intact and prevent quality problems such as bumps and damage, rust, and mixing. 9 Quality Information Feedback Management
9.1 When quality problems are found during the production process, production should be stopped immediately and analysis should be organized in a timely manner to find out the causes, implement responsibilities, and propose treatment methods or improvement measures. Production can only be carried out after production verification and confirmation of qualification. 9.2 During the production process, various factors that affect product quality can be fed back through the information management system, and relevant units can be supervised to solve them and establish a quality accident analysis table.
9.3 Regularly visit users (or the next process), and promptly study and handle the opinions and feedback information raised during the visit. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping parts
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method3.8 If any part is found unqualified after inspection, production shall be stopped immediately and the unqualified parts handling procedure shall be followed. 8.4 Stamping Supplementary Process
8.4.1 The surface treatment of stamped parts that require sandblasting, shot blasting, tumbling, pickling, and phosphating shall be carried out in accordance with the relevant process documents. The surface quality after treatment shall meet the quality requirements of special process technical documents. 8.4.2 The heat treatment, machining, painting and other processes after the stamping process shall be carried out in accordance with the relevant provisions of the process documents. 8.4.3 Stamped parts shall be treated with rust prevention as required during storage or shipment, and the factory shall have process documents and management assessment systems for parts rust prevention.
8.4.4 The packaging of stamped parts shall be carried out according to special packaging technology, and the packaging quality shall meet the quality requirements of relevant documents. 8.5 Stamping Parts Inspection
8.5.17 Process Inspection
8.5.1.1.1. The factory must have a product quality inspection system. 8.5.1.2 The inspectors must conduct the first piece inspection for each batch, each shift, each time the mold and personnel are changed, and the products can be put into production only after they are qualified. During production, the inspection frequency specified in the process documents shall be strictly followed to conduct patrol inspections and monitor the quality changes of stamping parts; at the end of the production process, the final piece inspection shall be carried out. All inspections shall be recorded and accounted for. 8.5.1.3 During the process, the production workers shall conduct the first piece inspection, process self-inspection, and sequence mutual inspection to ensure product quality. 8.5.1.4 After the stamping process is qualified, the inspector shall sign on the inspection card before transferring to the next process. 8.5.2 Final inspection of stamping parts
8.5.2.1 Final inspection of stamping parts shall be carried out in accordance with the relevant provisions of product drawings, process documents, relevant standards or contracts, etc. 8.5.2.2 After the final inspection is passed, the inspection mark (or label) should be stamped on the specified part of the stamping part, or other marks should be made: 204
JB/T 8930--1999
8.5.2.3 The factory should have a management method for product identification and traceability control procedures. The corresponding identification list, location and requirements should be established, and records should be kept.
8.5.2.4 Qualified products
The certificate of conformity should be filled out by the inspection department in accordance with the relevant technical documents and technical standards or contract requirements. When the inspection confirms that the parts are qualified, the stamping parts certificate of conformity shall be issued, or a qualified mark shall be made. 8.5.2.5 Unqualified products
After the inspection by the inspection department, the parts that are confirmed to be unqualified should be filled out with a notification form. The parts should be marked, stored in isolation, and the unqualified product handling organization of the quality assurance system should be notified to handle them according to the unqualified product handling procedures. 8.6 Comprehensive management of the production process
8.6.1 The factory should have a production plan preparation and management control system, and should achieve planned balanced production to ensure the completion of the plan. 8.6.2 The factory should establish detailed rules for production site management, achieve on-site fixed-location management, and civilized production. There should be on-site management assessment records. 8.6.3 The factory should strictly implement process discipline, and should establish on-site process discipline inspection and management methods, conduct regular inspections of on-site process discipline, and establish process discipline inspection and assessment records. 8.6.4 Verify the process from time to time, especially the parts of new products and key parts with many problems and complexities. A process verification report system should be established. 8.6.5 The quality management point method should be promoted for key processes and key processes, and the quality management point should have an operation instruction and data record.
8.6.6 When non-conforming products need to be repaired, reworked, or accepted with concessions, the factory should have a management system for non-conforming products. Defective products should have review records, rework and repair records, product concession applications, return orders, scrap orders and other documents. 8.6.7 In order to prevent the recurrence of defective products, the factory should have a corrective and preventive measures control procedure. A product corrective and preventive measures verification method and a product quality improvement and research management method should be established. There should be measures such as product quality audit and rectification notice. 8.6.8 The factory should stipulate a regular or irregular product quality scheduling meeting system. At the meeting, major problems in production will be solved, quality assessment results will be announced, and quality research and quality rectification plans will be studied. 8.6.9 The factory should have product handling, storage, packaging, protection, and delivery procedures, and corresponding systems to ensure that parts are intact and prevent quality problems such as bumps and damage, rust, and mixing. 9 Quality Information Feedback Management
9.1 When quality problems are found during the production process, production should be stopped immediately and analysis should be organized in a timely manner to find out the causes, implement responsibilities, and propose treatment methods or improvement measures. Production can only be carried out after production verification and confirmation of qualification. 9.2 During the production process, various factors that affect product quality can be fed back through the information management system, and relevant units can be supervised to solve them and establish a quality accident analysis table.
9.3 Regularly visit users (or the next process), and promptly study and handle the opinions and feedback information raised during the visit. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping parts
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method2 Final inspection of stamping parts
8.5.2.1 Final inspection of stamping parts shall be carried out in accordance with product drawings, process documents and relevant standards or contracts. 8.5.2.2 After passing the final inspection, the inspection mark (or label) shall be stamped on the specified part of the stamping part, or other marks shall be made: 204
JB/T 8930--1999
8.5.2.3 The factory shall have management methods for product identification and traceability control procedures. The corresponding identification list, location and requirements shall be established and records shall be kept.
8.5.2.4 Qualified products
The certificate of conformity shall be filled in by the inspection department in accordance with relevant technical documents and technical standards or contract requirements. When the inspection confirms that the parts are qualified, the stamping parts certificate of conformity shall be issued, or a qualified mark shall be made. 8.5.2.5 Defective products
After inspection by the inspection department, if the parts are confirmed to be unqualified, a notification form should be filled out. The parts should be marked, stored in isolation, and the defective product handling organization of the quality assurance system should be notified to handle them according to the defective product handling procedure. 8.6 Comprehensive management of the production process
8.6.1 The factory should have a production plan preparation and management control system, and should achieve planned balanced production to ensure the completion of the plan. 8.6.2 The factory should establish production site management rules, achieve on-site fixed-location management, and civilized production. There should be on-site management assessment records. 8.6.3 The factory should strictly implement process discipline, and should establish on-site process discipline inspection and management methods, conduct regular inspections on on-site process discipline, and establish process discipline inspection and assessment records. 8.6.4 Verify the process from time to time, especially the parts of new products and key parts with many problems and complex problems. It is necessary to establish a process verification report system. 8.6.5 The quality management point method should be promoted for key processes and key processes. The quality management point should have an operation instruction and data record.
8.6.6 When non-conforming products need to be repaired, reworked, or accepted with concessions, the factory should have a management system for non-conforming products. Non-conforming products should have review records, rework and repair records, product concession applications, return orders, scrap orders and other documents. 8.6.7 In order to prevent the recurrence of non-conforming products, the factory should have a corrective and preventive measures control procedure. A product corrective and preventive measures verification method and a product quality improvement and breakthrough management method should be established. There should be measures such as product quality audit and rectification notice. 8.6.8 The factory should stipulate a regular or irregular product quality scheduling meeting system. At the meeting, major problems in production will be solved, quality assessment results will be announced, and quality breakthroughs and quality rectification plans will be studied. 8.6.9 The factory should have procedures for product handling, storage, packaging, protection, and delivery, and corresponding systems to ensure that parts are intact and prevent quality problems such as bumps and damage, rust, and mixing. 9 Quality information feedback management
9.1 When quality problems are found during the production process, production should be stopped immediately and analysis should be organized in a timely manner to find out the causes, implement responsibilities, and propose treatment methods or improvement measures. Production can only be carried out after production verification and confirmation of qualification. 9.2 During the production process, various factors affecting product quality problems can be fed back through the information management system, and relevant units can be supervised to solve them, and a quality accident analysis table can be established.
9.3 Regularly visit users (or the next process), and the opinions and feedback information raised during the visit should be studied and handled in a timely manner. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping parts
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method2 Final inspection of stamped parts
8.5.2.1 Final inspection of stamped parts shall be carried out in accordance with product drawings, process documents and relevant standards or contracts. 8.5.2.2 After passing the final inspection, the inspection mark (or label) shall be stamped on the specified part of the stamped part, or other marks shall be made: 204
JB/T 8930--1999
8.5.2.3 The factory shall have management methods for product identification and traceability control procedures. The corresponding identification list, location and requirements shall be established and records shall be kept.
8.5.2.4 Qualified products
The certificate of conformity shall be filled in by the inspection department in accordance with relevant technical documents and technical standards or contract requirements. When the inspection confirms that the parts are qualified, the stamped parts certificate of conformity shall be issued, or a qualified mark shall be made. 8.5.2.5 Defective products
After inspection by the inspection department, if the parts are confirmed to be unqualified, a notification form should be filled out. The parts should be marked, stored in isolation, and the defective product handling organization of the quality assurance system should be notified to handle them according to the defective product handling procedure. 8.6 Comprehensive management of the production process
8.6.1 The factory should have a production plan preparation and management control system, and should achieve planned balanced production to ensure the completion of the plan. 8.6.2 The factory should establish production site management rules, achieve on-site fixed-location management, and civilized production. There should be on-site management assessment records. 8.6.3 The factory should strictly implement process discipline, and should establish on-site process discipline inspection and management methods, conduct regular inspections on on-site process discipline, and establish process discipline inspection and assessment records. 8.6.4 Verify the process from time to time, especially the parts of new products and key parts with many problems and complex problems. It is necessary to establish a process verification report system. 8.6.5 The quality management point method should be promoted for key processes and key processes. The quality management point should have an operation instruction and data record.
8.6.6 When non-conforming products need to be repaired, reworked, or accepted with concessions, the factory should have a management system for non-conforming products. Non-conforming products should have review records, rework and repair records, product concession applications, return orders, scrap orders and other documents. 8.6.7 In order to prevent the recurrence of non-conforming products, the factory should have a corrective and preventive measures control procedure. A product corrective and preventive measures verification method and a product quality improvement and breakthrough management method should be established. There should be measures such as product quality audit and rectification notice. 8.6.8 The factory should stipulate a regular or irregular product quality scheduling meeting system. At the meeting, major problems in production will be solved, quality assessment results will be announced, and quality breakthroughs and quality rectification plans will be studied. 8.6.9 The factory should have procedures for product handling, storage, packaging, protection, and delivery, and corresponding systems to ensure that parts are intact and prevent quality problems such as bumps and damage, rust, and mixing. 9 Quality information feedback management
9.1 When quality problems are found during the production process, production should be stopped immediately and analysis should be organized in a timely manner to find out the causes, implement responsibilities, and propose treatment methods or improvement measures. Production can only be carried out after production verification and confirmation of qualification. 9.2 During the production process, various factors affecting product quality problems can be fed back through the information management system, and relevant units can be supervised to solve them, and a quality accident analysis table can be established.
9.3 Regularly visit users (or the next process), and the opinions and feedback information raised during the visit should be studied and handled in a timely manner. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping parts
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method2 During the production process, various factors that affect product quality can be fed back through the information management system, and relevant units can be supervised to solve them and establish a quality accident analysis table.
9.3 Regularly visit users (or the next process), and promptly study and handle the opinions and feedback information raised during the visit. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping parts
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method2 During the production process, various factors that affect product quality can be fed back through the information management system, and relevant units can be supervised to solve them and establish a quality accident analysis table.
9.3 Regularly visit users (or the next process), and promptly study and handle the opinions and feedback information raised during the visit. 9.4 The factory should establish an information management system and have internal and external information feedback tables. 10 Personnel quality control
10.1 Operators and quality control managers in various positions in stamping production should have corresponding professional theoretical knowledge and practical experience. 10.2 The factory should have personnel training control procedures and corresponding employee education management and training systems. Stamping operators, inspectors, physical and chemical inspectors, etc. must undergo corresponding professional technical training and assessments, and can only take up their posts after obtaining an operating license. 10.3 Technical requirements for various types of operators shall be trained and assessed according to the "knowledge and skills of forging in the technical level of mechanical industry workers" 10.4 Engineering and technical personnel engaged in stamping process and die design and repair must have a college degree or above or a corresponding technical level, and have rich stamping practical knowledge. 205
11 Preparation of enterprise process quality control specifications
JB/T 8930-—1999
The stamping process quality control specifications of enterprises should be carried out under the guidance of this specification. Enterprises are encouraged to formulate enterprise quality control specifications that are higher than this specification, but the level of quality control specifications formulated by enterprises cannot be lower than the basic requirements specified in this standard. Appendix A
(Appendix to the standard)
Catalogue of relevant technical standards
GB/T 13914—1992
GB/T 13915—1992
Dimensional tolerance of stamping parts
Angular tolerance of stamping parts
Shape and position tolerance of stamping parts
GB/T 13916
GB/T15825.115828.8—1995Forming properties and test methods of metal sheetsJB/T 4129--1999
Burr height of stamping parts
JB/T 4378. 1---1999
JB/T4378.2---1999
JB/T4381—1999
JB/T 5109.--1991
JB/T6959—1993
Metal cold stamping parts
Structural elements
General technical conditions for metal cold stamping partsbzxZ.net
Limit deviations of dimensions without tolerances for stamping and shearing blanking Specification for design of sheet metal bending process
Specification for design of sheet metal deep drawing process
JB/T 9157.2--1999
JB/T 9176—1999
Quality of precision blanking parts
Process quota of material consumption for stamping parts
Compilation method
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