Zhejiang manufacturing standard

Hot coil cylindrical helical compression spring
(Draft)
Standard preparation description

Zhejiang Jinchang spring Co., Ltd
August, 2020
Hot coil cylindrical helical compression spring (Draft)
Standard preparation description

1. Project background
1.1 development and technical advantages of spring industry
Although the spring industry is a small industry in the whole manufacturing industry, its role cannot be underestimated. The country's industrial manufacturing and automobile industry should speed up the development, and the spring industry, as one of the basic parts and components, needs a super early stage of development in order to adapt to the rapid development of the country's whole industry. At present, the output of China's spring industry tends to be saturated. According to expert statistics, China's spring production has reached 4 billion pieces. There are 21 categories and more than 1600 varieties of spring products, mainly including valve spring, suspension spring, diaphragm spring, damping spring, hydraulic spring, oil pump spring, butterfly spring, high temperature spring, snap spring, tension spring, torsion spring, compression spring Scroll spring and anisotropic spring, etc. At this stage, most of China's spring products are general springs with low technical content, and only a few large-scale high-tech products such as heterosexual parts and cross-section products can be produced.
In recent years, China's spring industry has achieved rapid development, and the technical level and quality level have been greatly improved. As a general-purpose component, the spring function covers many aspects such as shock absorption, energy storage, control and tension maintenance. Its application fields involve various fields of the national economy, including aerospace, electric power and nuclear power equipment, high-speed railway, automobile, medical equipment, daily hardware, toys, etc. In recent years, the rapid development of the national economy has driven the rapid growth of China's spring industry. The demand for the upgrading of mechanical equipment and the demand for the improvement of the performance of supporting hosts have a great role in promoting the improvement of the technical level and quality level of the spring industry.
The company's hot-rolled cylindrical spiral compression spring is produced in strict accordance with the procedures of material inspection, blanking, end grinding, steel seal identification, heating, coil spring, quenching, tempering, shot peening, flaw detection, strong pressure, end grinding, inspection, surface treatment, packaging, etc.                                                                 
In order to better guide production and ensure product quality. The Technology Department of the company has carefully prepared process documents to form a relatively complete process document system. In the manufacturing process of spring, the requirements of process documents shall be strictly followed to make the whole manufacturing process under control. In addition, the technology department also organized the process verification of the hot coil production line, including end heating, bar heating, tip grinding machine, spring coiling machine, quenching tank, tempering furnace, flaw detector, shot peening machine, force measuring machine and fatigue testing machine. The process verification results meet the technical and production requirements. Natural gas is used as energy for rod heating, which is more energy-saving and effective than traditional electric heating. The personnel, machine, material, method and environment of key processes shall be certified according to procedures. Key parts and components and key processes must undergo self inspection, mutual inspection and special inspection. Special processes shall be controlled according to the requirements of production process control procedure (JC / cxw-23). Monitor the process of special processes, and record the process of necessary items.                                                                       
The main quality characteristics of the spring are reflected in accuracy, strength, durability and safety. The hot-rolled cylindrical helical compression spring produced by the company meets the class 1 standard specified in the national standard in terms of precision indexes such as free height limit deviation, spring internal and external diameter limit deviation, height limit deviation under specified load, load limit deviation under specified height, etc; On the hardness after heat treatment, the hardness difference of the same batch is less than 3 HRC units, Achieved in shot peening strength (0.35 ~ 0.55) a level, the shot peening coverage reaches ≥ 90%, and its metallographic structure is tempered troostite, and the grain size grade of original austenite is no less than grade 5. These strength indexes make the hot-rolled cylindrical spiral compression spring produced by the company reach the international advanced level; in terms of permanent deformation, the spring is no more than 0.4% of the free height. In addition, the spring produced by the company has also been recycled For the fatigue test with the number of cycles not less than 1000 times, there is no fracture during the test, and the loss rate of working load F2 is ≤ 0.5%, which effectively ensures the durability of the hot-rolled cylindrical helical compression spring produced by the company; In terms of spring safety, the limits of cadmium, lead, tribute and hexavalent chromium all comply with the provisions of GB / t30512.  
1.3 necessity of subject matter research
At present, there are no national and industrial standards for hot-rolled cylindrical helical compression spring products in China.
The quality of various hot coil springs sold in the market is uneven, which is unstable for practical use. Therefore, it is very necessary and urgent to formulate the "made in Zhejiang" standard of hot coil cylindrical spiral compression spring, establish the industry benchmark standard and promote the healthy development of advantageous industries in Zhejiang Province.
Zhejiang Jinchang spring Co., Ltd. has rich experience in standard drafting and formulation, has participated in the drafting and formulation of up to 9 national standards, and is fully capable of drafting the group standard "made in Zhejiang" of hot rolled cylindrical helical compression spring.
1.4 overview of main drafting units of the project
Zhejiang Jinchang spring Co., Ltd. is located in the hometown of Xi Shi Chengxi Industrial Zone, Zhuji City, a national tourist city (company address: No. 8, Wangyun West Road, Chengxi Industrial Zone) it has beautiful mountains and rivers, beautiful and rich, and convenient transportation. Zhejiang Jiangxi railway, Hangzhou Jinhua and Wenzhou roads cross the territory. It is only 60 kilometers away from Hangzhou Xiaoshan International Airport. It is very convenient to come to Zhuji for business and tourism. The company now has a plant area of 26000 square meters, fixed assets of 98 million yuan and 350 employees There are 50 engineering technical teams in China, with sales of 120 million yuan in 2010. The company has passed ISO / ts16949-2002, ISO9001-2000, ISO14000 and other system certification, And obtained the standardized behavior of Zhejiang Province--- (---), the measurement and testing system is qualified --, and the laboratory of Jinchang company has become the motor vehicle spring testing center of Zhuji City. At present, the springs produced by the company have been sold in more than 30 countries and regions at home and abroad, and have formed a pattern dominated by automobiles, covering cars, minicars, trucks, construction machinery, mining machinery, petrochemical industry, power equipment, precision instruments, sports equipment Product series of electrical equipment, hardware, electric tools and other industries. Advanced production facilities, perfect testing equipment, professional inspector team, strong technical force and scientific management methods ensure the product quality and win the praise and trust of the majority of users. Production varieties: compression coil spring, tension spring, torsion spring, snap spring, drum spring, pagoda spring, disc spring, leaf spring, plane volute spring, window lifter spring, diaphragm spring, waveform spring, die spring, square flat steel spring, steel pagoda spring, suspension damping spring of various cars, mini cars, front and rear damping springs of motorcycles Truck air chamber brake spring, etc., with steel diameter of 0.2-80mm, including square steel, flat steel, various stainless steel and tin bronze springs. Production equipment: there are computer automatic spring coiling machines, automatic spring coiling machines of various sizes, advanced mesh belt drive automatic quenching furnace and tempering furnace, raceway spring reinforced shot blasting machine, surface electrostatic plastic spraying and electrophoresis equipment. Testing equipment: there are various specifications of spring tension and compression testing machine, spring fatigue testing machine, physical, chemical and metallographic analysis, flaw detection equipment of different specifications, material torsion and tension testing machine, etc. The company has a production history of more than 30 years since its establishment. Due to its long-term focus on product quality and high-quality service, the company has continuously developed and expanded, and has established long-term cooperative relations with many large and medium-sized enterprises in China. We sincerely hope that new and old friends at home and abroad will visit the company for guidance,
2. Project source
Zhejiang Jinchang spring Co., Ltd. submitted an application for project establishment to Zhejiang brand building Federation, which was demonstrated and approved by the provincial brand Federation, and issued the notice on Issuing the standard formulation plan of the third batch of "made in Zhejiang" in 2020 (ZPL [2020] No. 22). Project name: Hot rolled cylindrical spiral compression spring. It is planned to complete the formulation before December 31, 2020.
3. Overview of standard formulation
3.1 relevant units and personnel for standard formulation
3.1. 1. The leading organization and formulation unit of this standard: Zhejiang Institute of standardization.
3.1. 2. This standard is mainly drafted by Zhejiang Jinchang spring Co., Ltd.
3.1. 3. Units participating in the drafting of this standard: Zhejiang Mingfeng spring Co., Ltd.
3.1. 4. Main drafter of this standard: Fei Qingmin.  
3.2 main working process
3.2. 1. Preliminary preparations
According to the composition requirements of the standard working group of hot rolled cylindrical helical compression spring, Zhejiang Institute of standardization is the leading unit, Zhejiang Jinchang spring Co., Ltd. is the editor in chief, and the participants include Fei Qingmin, Zhao Jianming, Liu Xiaoming, Fang Zhou, Xu Liguang, Zhu Yanjun, Ji Guang, Yu Guowei, Liang chuantao and pan Dongbao.
The standard working group decided that relevant personnel of Zhejiang Jinchang spring Co., Ltd. should complete the main standard preparation, and Xu Liguang should be responsible for the sorting and preparation of the preface, scope and quality commitment in the standard; Zhu Yanjun is responsible for the drafting of performance parameters, normative references, technical requirements, basic requirements, test methods, inspection rules, marks, packaging, transportation and storage and the standardization of standard contents; Ark is responsible for reviewing the contents of the standard; The overall architecture quality of the standard is controlled by Zhejiang Institute of standardization.
3.2. 2. Standard kick-off meeting (to be held)
In accordance with the standard formulation requirements of "made in Zhejiang", the leading unit, Zhejiang Institute of standardization, organized the launching meeting and seminar of Zhejiang manufacturing group standard of "hot rolled cylindrical spiral compression spring" in Zhejiang Jinchang spring Co., Ltd. on September 4, 2020, Experts from Zhejiang (Yiwu) National Standards Technology Evaluation Center, China machinery productivity promotion center, national spring Standards Committee and other units were invited to discuss the draft standards for project application, and the minutes of the meeting were formed after the discussion.
3.2. 3. Development of standard draft
The standard preparation team has carried out the standard development in the following three aspects according to the requirements of the minutes of the standard kick-off meeting.
A. provides for advanced research on technical indicators
Through the data collection of the standard development team, combined with the actual technical indicators of the company's advanced hot-rolled cylindrical spiral compression spring, and through careful comparison, analysis and discussion, it is determined to build a high-precision, high-strength and high durability by improving the four indicators of product dimensional accuracy, material strength, parallel life and harmful material limit, "Zhejiang made hot coil cylindrical spiral compression spring" with high safety.
B. for the basic requirements (type test specification of technical indicators, product design, raw materials, key technologies, processes, equipment, etc.), quality assurance advanced research.
The framework requirements are formulated according to the "made in Zhejiang" standard. This standard specifies the basic requirements, performance requirements, test methods, inspection rules, labels, packaging, transportation, storage and quality commitment of hot-rolled cylindrical helical compression springs.
c. Development of draft standards in accordance with the framework requirements of "made in Zhejiang" standards and the preparation concept and positioning requirements of "made in Zhejiang" standards
The formulation of the standard of hot rolled cylindrical helical compression spring made in Zhejiang is dominated by high precision, high strength, high durability and high safety. The incoming materials strictly control the harmful substance hexavalent chromium, which complies with the provisions of GB / T 30512. The product is applied to the state of high temperature and high pressure to ensure safe production. Our company has rich experience in the manufacture of hot coil spring and the promotion of optimized design products. In line with the industrial orientation of green manufacturing. Through standard guidance, promote the innovation and upgrading of cylindrical spiral compression spring manufacturers with hot coil, enhance the ability of independent innovation, and improve the overall quality level and international competitiveness of China's product industry.
The technical level of this standard has reached the international advanced and domestic first-class level.
3.2. 4. Solicit opinions
To be written.
3.2. 5. Expert review
To be written.
3.2. 6. Standard approval
To be written.
4. Standard preparation principle, main contents and determination basis
4.1} preparation principle
(1) Following the positioning of "made in Zhejiang" standard, its main technical indicators have reached the domestic first-class and international advanced level.
(2) the standard establishment follows the principle of "compliance, necessity, advanced nature, economy and operability", and pays attention to the operability of standards.
(3) Try to be in line with international standards.
(4) It shall be prepared and expressed in accordance with GB / T 1.1-2020 guidelines for Standardization - Part 1: structure and preparation of standards.

4.2 main contents and determination basis
4.2. 1 chapter "scope"
This standard specifies the basic requirements, technical requirements, test methods, inspection and acceptance, marking, label, packaging, storage and transportation and quality commitment of hot-rolled cylindrical helical compression spring.
This standard is applicable to the production, inspection and user acceptance of hot coil cylindrical spiral compression spring.
4.2. Chapter 2 "normative references"
Normative references are quoted without date, unless specific terms and data are specified during quotation, and all the latest (Revised) standards issued before 2020 have been checked and updated.
4.2. 3 chapter "basic requirements"
Follow the policy of "excellent quality and independent innovation" to create Zhejiang manufacturing standards and their products. The basic requirements and technical requirements in the standards mainly come from the above standards and the production practice of the enterprise. In production practice, enterprises constantly optimize the performance of products, explore new processing technology, study test and detection methods, and optimize product design. At the same time, it increased cooperation with scientific research institutes, tracked the latest international and domestic scientific research trends, and determined the optimal parameters and the most advanced and efficient test and detection methods and equipment in product design and production. Compared with existing advanced peer product standards:
1) Put forward requirements for material mechanical properties, material heat treatment, product test, verification ability and process improvement ability in the process of product design;
2) Increase the requirements for raw materials of hot coil spring;
3) The requirements for manufacturing process and equipment of hot coil cylindrical helical compression spring are added;
4) Requirements for product testing instruments are added.
4.2. Chapter 4 "technical requirements"
According to the application characteristics of hot-rolled cylindrical spiral compression spring and with reference to the technical requirements of advanced enterprises at home and abroad, this product standard has tightened the requirements for some properties on the basis of referring to the advanced peer product standards and the requirements of high-end customers, such as:
1) The requirements for dimensional deviation and crimping height in appearance and size are tightened;
2) The requirement of replacing permanent parallelism with permanent parallelism by thermal compression is added, which can better reflect the product properties under the limit state of customer demand;
3) Increase the requirements for the detection of harmful substances in products to ensure the safety of products;
4) Add the requirements of fatigue life test to ensure the durability of products:
5) Requirements for uniformity of lifting end face;
4.2. Chapter 5 "test methods"
The product inspection method corresponds to the technical requirements one by one, and the principle of the detection and test method is consistent with the national standard, but according to the practical application of hot coil cylindrical spiral compression spring,
4.2. 6 Chapter "inspection rules"
Product inspection is divided into outgoing inspection, acceptance inspection and type inspection according to its status and needs.
Type inspection is required as follows:
Trial production and finalization appraisal of new products or old products transferred to another factory;
After formal production, if the structure, material and process change greatly, which may affect the product performance;
During normal production, type inspection shall be conducted once a year;
When the product is stopped for more than six months and resumed production;
The delivery inspection results are quite different from the last type inspection;
When the national quality supervision organization puts forward the requirements for type inspection.
4.2. 7 chapter "labeling, packaging, transportation and storage"
The labeling, packaging, transportation and storage of products will comply with the relevant national standard GB 3796.
4.2. Chapter 11 "quality commitment"
According to the concept of "industrial coordination and social responsibility" advocated by Zhejiang manufacturing, we solemnly promise in the standard:
1) Under the condition that the user complies with relevant technical documents and agreements and normal use, the shelf life of the product is. During the warranty period, the design and manufacturing enterprise shall be responsible for any quality problems caused by product design and manufacturing
2) Manufacturing enterprises undertake the responsibility of technical services in the whole product life cycle. Respond to the feedback of customers (including final customers) quality problems within 24 hours, and timely and properly solve them after communicating with customers.
5, the embodiment of advanced standards.
5.1 comparative analysis of all indexes specified in the type test. (comparison with international, national, industrial and enterprise standards of similar products, comparative analysis of key indicators at home and abroad, or comparison with relevant data of tested foreign samples and prototypes.)
This standard is prepared with reference to the enterprise standards and industry general executive standards of domestic first-class manufacturers and in combination with the company's understanding of product quality. The development of spring production towards high precision, high strength, high durability and high safety is fully considered. As a hot-rolled cylindrical helical compression spring under high temperature and high pressure, it has higher requirements for the durability and service life of the product. The standard provides comprehensive requirements in terms of shot peening strength, shot peening coverage, hardness difference, permanent deformation, fatigue life, limit of harmful substances, perpendicularity and consolidation height. The hot coil cylindrical helical compression spring is supplemented and improved from the depth and breadth of the index.
The concrete advanced features are as follows:
Technical indicators
◆ item: durability (thermal compression set / fatigue life)
◆ note: compared with the requirements of peers and customers, the height of permanent deformation is reduced by 0.1%. The fatigue life regulation greatly improves the service life and practicability of products
◆ purpose: to improve the service life of the product
◆ index comparison:
Main quality characteristics
Key technical indicators
GB / t23934-2015 requirements
Iso11891:2012 requirements
Proposed Zhejiang manufacturing group standard
durability
Thermal compression set
No requirement
No requirement
≤ 5% of free height
fatigue life 
No requirement
No requirement
There is no fracture after 20000 cycle tests, and the working load f loss rate is ≤ 0.5%
◆ item: strength (shot peening strength / shot peening coverage / hardness difference)
◆ note: it is still blank in the existing domestic enterprise standards. In order to enhance the strength of hot coil compression spring, the parameters of shot peening strength and shot peening coverage are hereby added. Increase the hardness difference of the spring to improve the comprehensive performance.
◆ purpose: to improve the strength of the product
◆ index comparison:
Main quality characteristics
Key technical indicators
GB / t23934-2015 requirements
Iso11891:2012 requirements
Proposed Zhejiang manufacturing group standard
strength
Shot peening strength
Agreed by both parties
Agreed by both parties
0.35～0.55A
Shot peening coverage
Agreed by both parties
Agreed by both parties
≧90%
Hardness difference
≦6HRC
≦75HRW
≦3HRC
◆ item: accuracy (perpendicularity / crimping height)
◆ Description: increase the spring perpendicularity deviation to ≤ 2.0% h, increase the pressure and height, and greatly improve the product production accuracy.
◆ purpose: to improve product accuracy
◆ index comparison:
Main quality characteristics
Key technical indicators
GB / t23934-2015 requirements
Iso11891:2012 requirements
Proposed Zhejiang manufacturing group standard
accuracy
verticality
≦2.6%H0
≦2.6%H0
≦2.0%H0
Crimping height
Agreement between the supplier and the demander
Agreement between the supplier and the demander
≤ (total number of turns - 0.3) × Wire diameter
◆ project: Safety
◆ note: in order to protect human health, increase the detection of harmful substances in products, such as cadmium, lead, tribute and hexavalent chromium, which shall comply with the provisions of GB / T 30512.
◆ purpose: to improve product safety
◆ index comparison:
Main quality characteristics
Key technical indicators
GB / t23934-2015 requirements
Iso11891:2012 requirements
Proposed Zhejiang manufacturing group standard
Security
Restriction of hazardous substances
No requirement
No requirement
The limits of cadmium, lead, chromium and hexavalent chromium shall comply with the provisions of GB / T 30512.
5.2 basic requirements (type test stipulates product design, raw materials, key technologies, processes, equipment, etc.), quality commitments, etc., which reflect the correlation between the advanced characteristics of "Zhejiang manufacturing" standard "four fine" features.
This standard adds the content of specifying the basic requirements and quality commitment in product design, raw materials, process, equipment, testing, etc.
5.2. 1. Design and R & D
Develop design software for lightweight design and complete design optimization.
Stress shot peening and heating standing treatment to improve the residual stress of the spring;
The secondary strengthening shot peening process is adopted to improve the fatigue resistance of the spring, and the rapid tempering with new equipment is studied;
The material heat treatment research adopts the advanced water quenching process.
5.2. 2. Raw materials
In the selection of raw materials, strict requirements are put forward for hardness, tensile strength, lower yield strength, elongation after fracture, reduction of area and composition of harmful substances:
Raw material control items and indexes of hot coil helical compression spring
Items
Index mark
Hardness ≤
≦321HBW
Tensile strength ≥
≥1275MPa
Lower yield strength ≥
≥1130MPa
Elongation after fracture ≥
≥10%
Reduction of area ≥
≥40%
Hazardous substance composition
The limits of cadmium, lead, chromium and hexavalent chromium shall comply with the provisions of GB / T 30512
The main parameters involved in mechanical properties are permanent deformation and fatigue life, which mainly control the mechanical properties and harmful substances of raw materials.
5.2. 3. Manufacturing process and equipment
The spring shall be subject to stress relief tempering and surface strengthening treatment, and the hardness of heat treatment shall be assessed.
For springs with compressive stress ≥ 0.45rm, normal temperature / heating standing treatment or strong pressure treatment shall be carried out.
Spring strengthening shall be subject to surface shot peening after spring grinding according to the requirements of GB / T 31214.1 and JB / T 10802.
Finite element analysis, spectrum analyzer and corresponding analysis equipment.
The spring shall be tested for hardness after heat treatment, and its hardness shall meet the requirements of the drawing. At the same time, the hardness difference of the same batch shall be less than 3 HRC units.
It shall be tempered troostite (oil quenched and tempered material), and a small amount of sorbite is allowed.
Decarburization of harmful substances is not allowed on the spring surface.
The original austenite grain size grade of spring products is generally not less than 5.
The spring shall be subject to shot peening strengthening treatment. The shot peening treatment shall be carried out according to GB / T 31214.1 and JB / T 10802-2007. The shot peening strength shall be (0.35 ~ 0.55) a and the shot peening coverage shall be ≥ 90%.
5.2. 4. Detection capability
It shall have the ability to detect perpendicularity, merging height, shot peening strength, shot peening coverage, hardness difference, permanent deformation, fatigue life, limit of harmful substances and other indicators.
It shall have the ability to detect the whole project of hot-rolled cylindrical spiral compression spring.
It shall be equipped with metallographic equipment, spectrum analyzer, material tensile testing machine, six component testing machine, transverse load testing machine, special fatigue testing machine for locomotive spring, special fatigue testing machine for suspension spring made in France, domestic suspension spring fatigue testing machine, magnetic particle flaw detection equipment and other detectors.
5.2. 5. Quality commitment:
Products shall be traceable.
Under normal transportation and storage conditions, the shelf life of the product is 2 years.
If there is any objection to the product quality, it shall make a response within 24 hours and provide solutions to customers in time.
The 5.3 standard can embody the advanced content of "intelligent manufacturing" and "green manufacturing".
1) Current level of green manufacturing and intelligent manufacturing: Green Manufacturing:
1. The company attaches importance to the idea of circular economy and an economic development model characterized by resource conservation and recycling and harmonious with the environment. It emphasizes organizing economic activities into a feedback process of "resources, products and renewable resources". It is characterized by low mining, high utilization and low emission. All materials and energy can be reasonably and sustainably utilized in this continuous economic cycle, so as to reduce the impact of economic activities on the natural environment to the smallest extent possible. In the production process of gelatin hollow capsules, the enterprise makes the discharged wastewater go through the cleaning treatment of the sewage treatment system through the means of circular economy, so as to reach the level of clean water and achieve the recycling of water resources.
2. The company adopts cleaner production to control the whole production process and the whole product life cycle. In terms of wastewater treatment: A. rainwater and sewage diversion and clean diversion are implemented for drainage, and the rainwater in the plant area is collected by rainwater pipeline and discharged into nearby rivers; b. A set of 8t / D sewage treatment facilities is set in the plant area, and the production wastewater is incorporated into the municipal sewage pipe network after reaching the standard; c. The domestic sewage is discharged into the sewage pipe network of Zhuji Chengxi Development Zone after being treated in the septic tank and sent to Zhuji sewage treatment plant for treatment; d. Standardized setting of wastewater and rainwater outlets, i.e. sampling outlets and obvious sewage signs.
In terms of waste gas treatment: a. the dust generated by shot peening is removed by a bag filter with a dust removal rate of 99%, and then discharged through a 15m high exhaust funnel; b. The plastic spraying dust is discharged up to standard through a 15m high exhaust funnel after passing through a bag filter with a dust removal rate of 99%; c、 The oil fume waste gas (non methane total hydrocarbon) generated by the oil quenched steel wire production line and tempering furnace is collected by the gas collecting hood and passed through the electrostatic range hood (the purification rate shall not be less than 95%) after the treatment is up to standard, it shall be discharged through a 15m high exhaust funnel; D. the plastic spraying drying fuel shall be natural gas, and the combustion waste gas shall be collected by the flue and discharged through a 15m high chimney; e. the waste gas discharge outlet shall be standardized, that is, permanent sampling holes shall be set and pollutant discharge signs shall be set.
In terms of noise treatment: A. when purchasing production equipment, try to select low-noise and efficient equipment; b. The equipment shall be installed in the middle of the workshop as far as possible, and the damping pad shall be set at the bottom; c. Install matching mufflers at the inlet and outlet of the dust collector fan; d. Regular repair and maintenance of mechanical equipment.
In terms of solid waste treatment: waste steel wire, shot blasting dust collection, waste steel shot and waste packaging materials are recycled and comprehensively utilized by the material recovery company after classified collection; Plastic spraying dust collection will be used for production after collection; Waste engine oil, waste lubricating oil, waste liquid pressure oil, waste quenching oil and waste oil collected by oil fume purifier are hazardous solid wastes, which shall be collected by category and put in sealed barrels, and entrusted to Zhejiang Zhaoshan Environmental Protection Technology Co., Ltd. for treatment. During transportation, a hazardous waste transfer contact form shall be issued to the local environmental protection department; The sludge and sediment produced by the sewage treatment unit are collected and dried and entrusted to Zhejiang Zhaoshan Environmental Protection Technology Co., Ltd. for treatment; Domestic garbage is collected in bags and put into designated places every day for disposal after being collected by the environmental sanitation department.
Intelligent Manufacturing:
1. The company adopts ERP system to closely integrate the company's human, financial, material, production, supply and marketing and corresponding logistics, information flow, capital flow, management flow and value-added flow, so as to realize resource optimization and sharing. ERP realizes the integration of the company's information system. The modular design method is adopted to improve the company's adaptability.
2. Centralized data storage: integrate the data originally scattered in all corners of the enterprise to make the data consistent and improve its accuracy. In the integrated environment, the information generated by the company's content can be obtained and applied anywhere in the enterprise through the system.
3. Improved management performance, ERP system will make the horizontal connection between parts effective and close, so as to improve management performance. Through ERP system, Internet and supply management mode, the company can closely combine with raw material suppliers to increase its ability to change the market.
6. Coordination with current relevant laws, regulations, rules and relevant standards
6.1. Main standards currently implemented in China
At present, there are no similar international, national and industrial standards for hot-rolled cylindrical helical compression spring products, and enterprises are not satisfied
The industry is basically self-developed standards. Therefore, it is very necessary and urgent to formulate and publish a set of "made in Zhejiang" group standards of hot coil cylindrical helical compression spring, establish industry benchmark standards, promote the healthy development of advantageous industries in Zhejiang Province, and standardize the green pesticide industry.
6.2 conflict between this standard and relevant laws, regulations, rules and mandatory standards
nothing
6.3 the following documents are referenced in this standard:
GB / T 224-2008 determination of decarburization depth of steel
GB / T 230.1-2009 metallic materials Rockwell hardness test Part 1: Test methods
GB / T 231.1-2009 metallic materials Brinell hardness test Part 1: Test methods
GB / T 702-2017 hot rolled steel bars - Dimensions, shapes, weights and tolerances
GB / T 1805-2001 spring terminology
GB / T 6394-2017 determination of average grain size of metals
GB / T 8170-2008} numerical rounding off rules and expression and determination of limit values
GB / T 31214.1-2014 spring shot peening Part 1: General rules
GB / T 10802-2007 technical specification for spring shot peening
ISO 683-14-2004 - heat treated, alloy and easy cut steels - Part 14: hot rolled steels for Quenched and tempered springs
ISO 9588-2007 - metallic and other inorganic coatings - post coating treatment of iron and steel to reduce the risk of hydrogen embrittlement
GB / T 1222-2016 spring steel
GB / T 30512-2014 requirements for prohibited substances in automobiles
GB / T 7367-2013 magnetic particle testing method for cylindrical helical compression springs
GB / T 23934-2015 ― hot coil cylindrical helical compression spring ― technical conditions
GB / T 13298-2015 test method for microstructure of metals
GB / T 16947-2009 # fatigue test code for coil springs
GB / T 2827.1-2012 sampling inspection procedures by attributes Part 1: sampling plans for batch inspection retrieved by acceptance quality limit (AQL)
The above referenced documents are currently valid.
7. Social benefits
Through standard guidance, promote the innovation and upgrading of hot-rolled cylindrical spiral compression spring manufacturers, enhance the ability of independent innovation, improve the performance and use of hot-rolled cylindrical spiral compression spring, reduce environmental pollution, and improve the overall quality level and international competitiveness of China's spring product industry.
8. Handling process and basis of major differences
Not yet
9. Suggestions on Abolishing existing relevant standards
Not yet
10. Put forward suggestions and reasons for compulsory implementation or recommended implementation of standards
This standard is the group standard of Zhejiang brand building Federation.
11. Implementation of standard requirements and measures
The text of the "made in Zhejiang" standard has been approved and published by Zhejiang brand building Federation on the official website（ http://www.zhejiangmade.org.cn/ ）The full text is published for free reference.
The main drafting unit of the standard will be on the enterprise standard information public service platform（ http://www.cpbz.gov.cn/ ）This standard is adopted for self declaration, and other units adopting this standard shall also make self declaration on the information platform.
12. Other matters to be explained
None.

Standard development working group of hot coil cylindrical helical compression spring
August 14, 2020