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China's spring standardization work began in the early 1960s and has a history of over 40 years. It has formed a relatively complete standard system, with 22 national standards and 30 industry standards for springs. In 1999, the National Spring Standardization Technical Committee (SAC/TC235) was approved by the General Administration of Quality Supervision, Inspection, and Quarantine of the People's Republic of China, and the standardization work of springs was promoted. In 2004, ISO/TC227 (Spring) was established internationally, and China participated as a member of P, marking a new stage in China's spring standardization work; Track and substantively participate in work levels.

China is a developing country and a major manufacturer of spring products. The favorable economic environment and preferential policies attract many foreign enterprises to develop in China. The Standardization Committee will track new changes in spring standards worldwide, actively participate in international standardization work, and timely serve the spring industry to enhance the competitiveness of China's spring products and meet the needs of global trade.

Organizational Structure of the Standardization Committee

1. Established on:

In May 1999, the first National Spring Standardization Technical Committee was established with the approval of the National Standardization Management Committee; In January 2005, the second National Spring Standardization Technical Committee was established with the approval of the National Standardization Administration Committee;

2. Personnel:

Composed of 44 representatives and 4 consultants from enterprises and research institutions. It involves enterprises engaged in manufacturing coil spring, leaf spring, Gas Spring, material manufacturing, equipment manufacturing, etc.

3. Institutional responsibilities:

Responsible for standardizing technical work in the spring industry; 4. Institution code:

SAC/TC235

1、 Origin of Work

1. The earliest time: the 1960s;

2. The earliest undertaking unit: Mechanical Science Research Institute of the First Ministry of Mechanical Industry

3. The earliest spring standard: "Technical Conditions and Design Calculation of Cylindrical Spiral Springs" - a guiding technical document of the Ministry of Machinery; 4. Industry situation: The spring industry is in a loose stage, and the enterprise has not yet formed specialized production.

2、 Scale development stage

1. Time: 1974-1985; 2. Undertaking unit: Standardization Research Institute of the First Machinery Department;

3. Standard quantity: More than 10 design, manufacturing, process, and specification standards for cylindrical spiral springs, as well as several plate spring standards; 4. Industry status: Spring production has formed specialization, and industry organizations have been preliminarily established.

3、 Improvement system and revision stage

1. Time: 1986-1998; 2. Undertaking unit: Standardization Research Institute of the Ministry of Machinery;

3. Standard quantity: revision of more than 10 cylindrical spiral spring standards; New standards for Gas Spring, variable pitch spring, compound spring, high temperature resistant spring, etc; Revise several items of leaf spring standards; The standard system has basically formed.

4. Industry situation: Spring standards are more in line with foreign standards, spring production technology is increasingly improving, and industry technical exchanges and academic activities are active.

5. Quality status: Quality management and quality control are carried out in the enterprise. Start conducting product quality supervision and inspection. 4、 Standard Committee Operation Phase

1. Time: 1999-2007;

2. Undertaking unit: National Spring Standardization Technical Committee;

3. Standard quantity: On the basis of improving the system, more than 10 standards have been formulated and revised, and more than 30 standards have been reviewed, cleared, and reorganized; A relatively complete spring system has been formed.

4. Industry status: Standardization committees, associations, and societies carry out standardization, academic, technical exchanges, and business activities. Standardization is closely integrated with industry development.

5. The Standardization Committee tracks the international standardization trends of single springs. 5、 Substantive participation of the Standardization Committee in the international standardization stage 1. Starting from 2003;

2. Undertaking unit: National Spring Standardization Technical Committee;

3. Undertaken projects: Participated in the compilation of the "Six Mandarin Spring Dictionary", participated in international spring standardization conferences in Yokohama, Germany, Dusseldorf, Tokyo, and actively supported and promoted the establishment of the Spring International TC.

4. International organization: ISO/TC227 (Spring) established. China is a member of P.

5. The Standardization Committee tracks the international standardization trends of springs and actively participates in international standardization work. Further promote the standardization work of the domestic spring industry.

The spring standard catalog is currently available:

23 national standards

GB/T 1239.1-1989 Technical Conditions for Cold Rolled Cylindrical Helical Tension Springs GB/T 1239.2-1989 Technical Conditions for Cold Rolled Cylindrical Helical Compression Springs GB/T 1239.3-1989 Technical Conditions for Cold Rolled Cylindrical Helical Torsion Springs GB/T 1239.4-1989 Technical Conditions for Hot Rolled Cylindrical Helical Single Springs GB/T 1239.6-1989 Design and Calculation of Cylindrical Helical Single Springs GB/T 1973.1-2005 Technical Conditions for Small Cylindrical Helical Single Springs

GB/T 1973.2-2005 Dimensions and parameters of small cylindrical spiral tension springs GB/T 1973.3-2005 Dimensions and parameters of small cylindrical spiral compression springs GB/T 2087-2001 Dimensions and parameters of cylindrical spiral tension springs (semi circular hook ring type)

GB/T 2088-1997 Dimensions and Parameters of Cylindrical Spiral Stretch Springs (Circular Hook Ring Pressure Center Type)

GB/T 2089-1994 Cylindrical Spiral Compression Springs (Both Ends Tightly Ground or Forged Flat) - Dimensions and Parameters GB/T 4142-2001 Cylindrical Spiral Tension Springs - Dimensions and Parameters (Circular Hook Ring Type)

GB/T 2785-1988 Technical Conditions for Valve Springs in Internal Combustion Engines

GB/T 2940-2005 Technical Conditions for Fuel Injection Pumps, Governors, and Fuel Injectors Springs for Diesel Engines GB/T 4036-1983 Watch Springs

GB/T 4037-1983 Watch Swivel GB/T 1972-2005 Belleville Springs

GB/T 10867-1989 Spring Shock Absorbers

GB/T 13828-1992 Multi Strand Cylindrical Spiral Springs GB/T 9296-1988 Floor Springs

GB/T 1805-2001 Spring Terminology

GB/T 1358 - 1993 Dimensional Series of Cylindrical Helical Springs GB/T 19844-2005 leaf spring

30 industry standards

JB/T6655-1993 Technical Conditions for High Temperature Resistant Springs

JB/T 10416-2004 Technical Conditions of Coil Springs for Automobile Suspension JB/T 10417-2004 Technical Conditions of Shock Springs for Motorcycles JB/T 10418-2004 Design and Calculation of Gas Spring

JB/T 6653-1993 Flat Steel Wire Cylindrical Spiral Compression Springs JB/T 6654-1993 Technical Conditions for Plane Scroll Springs JB/T 7366-1994 Design and Calculation of Plane Scroll Springs JB/T 8584-1997 Rubber Metal Spiral Composite Springs JB/T9129-2000 Metallographic Examination of 60Si2Mn Steel Spiral Springs JB/T9127-2000 Technical Specification for Shot Peening of Cylindrical Spiral Single Springs

JB/T 3338.1 - 1993 Technical Conditions for Cylindrical Helical Compression Spring of Hydraulic Parts JB/T33388.2 - 1993 Design and Calculation of Cylindrical Helical Compression Single Spring of Hydraulic Parts JB/T8046.1 - 1996 Compression Gas Spring

JB/T8046.2 - 1996 Lockable Gas Spring

JB/T 7367.1-2000 Ultrasonic Testing Methods for Cylindrical Spiral Compression Springs JB/T 7757.1-1995 Cylindrical Spiral Single Springs for Mechanical Seals

JB/T 7283-1994 Technical Conditions for leaf spring of Agricultural Machinery JB/T 50022-1994 Quality Grading of leaf spring of Agricultural Machinery JB/T3383-1983 Bench Test Methods for Automobile leaf spring

JB/T 3782 - 1984 Metallographic Inspection Standard for Automobile leaf spring JB/T539 - 1984 Technical Conditions for Automobile leaf spring Pin and Lifting Lug

ZB T 06001 - 1988 Specification for Shot Peening Treatment of Automobile leaf spring QCn29035 - 1991 Technical Conditions of Automobile leaf spring QC/T 29103 - 1992 Specification for Quality Grading of Automobile leaf spring JB/T 53394 - 2000 Quality Grading of Belleville Springs

JB/T 3396-2000 Quality Classification of Cylindrical Spiral Compression Springs for Hydraulic Components JB/T58700-2000 General Principles for Quality Classification of Spring Products

JB/T 58701-2000 Quality Classification of Small Cylindrical Spiral Springs JB/T 58702-2000 Quality Classification of Cylindrical Spiral Springs JB/T 7944-2000 Sampling Inspection of Cylindrical Spiral Springs

Standardization of Spring in China and Development of the Industry

·Standardization and Technology

The Standardization Committee regularly holds technical exchanges and exhibitions in the spring industry, promotes new technologies, products, materials, and equipment, conducts joint research, and provides technical impetus for the development of the industry. Previous exchange meetings:

October 1994, Changzhou, Jiangsu; April 1996, Changzhou, Jiangsu

September 1998, Wuxi, Jiangsu; April 2001, Jinan, Shandong; April 2003, Hangzhou, Zhejiang; April 2005, Wuxi, Jiangsu; April 2007, Changzhou, Jiangsu

·Standardization and Quality

The Standardization Committee and the General Parts Testing Center operate together to build a quality platform for the entire industry and provide quality assurance for industry development. Previous spring product quality spot checks (***********):

Spring for diesel engines in the first quarter of 1992 Valve spring in the third quarter of 1992 Hot coil spring in the third quarter of 1993 Valve spring in the second quarter of 1995 Valve spring in the third quarter of 1996 Diesel engine spring in the first quarter of 1997 Precision spring

Suspension spring in the first quarter of 1998, valve spring in the fourth quarter of 2000, Gas Spring in the third quarter of 2001, standardization and academic

The Standardization Committee is the deputy secretary-general unit of the Spring Failure Subcommittee of the Chinese Society of Mechanical Engineering, actively advocating for promoting academic exchanges and creating an academic atmosphere for the development of the industry.

Standardization and International Exchange

The Standards Committee is an international exchange window, promoting international exchange and accelerating industry development through spring standards and standardization. International activities since 2003:

Starting from 2003, we collaborated with the Japan Spring Industry Association to compile and verify a multilingual spring terminology dictionary. 2. November 2003 Yokohama International Conference, Japan.

3. April 2004 International Conference in Dusseldorf, Germany.

September 2004 Tokyo Conference, Japan

5. November 2004 Yokohama Standardization Exchange Seminar in Japan

6. The first meeting of lSO/TC 227 in Tokyo, Japan in August 2005

7. November 2005 Yokohama Standardization Exchange Seminar in Japan 8. April 2005 Wuxi Technical Exchange Conference in China

April 2006 International Conference in Dusseldorf, Germany

10. August 2006 Beijing Sino Japanese Spring Standards and Industry Exchange 11. 2006 Yokohama Standardization Exchange Training Course Standardization and Training

Through the organizational system of the Standardization Committee, training activities are carried out to provide high-quality talents for the sustainable development of the industry. Since 2003, the Standards Committee has continuously held a series of technical training and standardization training courses for the spring profession.

They are:

2003 Series One: Spring Shot Peening Technology 2004 Series Two: Spiral Single Spring Design Calculation 2005 Series Three: Spring Failure Technology

Training for members of the Standardization Committee in 2005: Guidelines for Compiling GB/T1.1 Standards Training for 2006 Series 4: Standardization and Training of Missile Materials, Heat Treatment, and Related Inspection Techniques

Through the organizational system of the Standardization Committee, training activities are carried out to provide high-quality talents for the sustainable development of the industry. Since 2003, the Standards Committee has continuously held a series of technical training and standardization training courses for the spring profession. They are: One of the 2003 series of training: Spring Shot Peening Technology

2004 Series 2: Spiral Spring Design Calculation 2005 Series 3: Spring Failure Technology

2005 Training for Standardization Committee Members: GB/T1.1 Standard Writing Guidelines Training

2006 Series Training Part 4: Spring Materials, Heat Treatment, and Related Inspection Techniques