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The formulation of quality standards for automotive wiring harnesses is a process that comprehensively considers multiple factors, aiming to ensure the performance, safety, and reliability of wiring harnesses in vehicles. The following are the main aspects and steps to consider when developing quality standards for automotive wiring harnesses:
1、 Clarify the purpose and scope of standard setting
Purpose: The purpose of establishing quality standards for wiring harnesses is to improve the quality of wiring harnesses, ensure the performance and safety of automotive electrical systems, reduce the rate of defective products, and meet relevant national and industry requirements.
Scope: Determine the applicable wire harness types, vehicle types, and specific application scenarios for the standard.
2、 Refer to relevant regulations and industry standards
National regulations: Adhere to national laws and regulations on automotive electrical systems, wiring harnesses, and components to ensure the legality and compliance of wiring harness quality standards.
Industry standards: Referring to relevant standards in the domestic and foreign automotive industry, such as ISO, SAE, DIN and other international standards, as well as relevant standards of the China Association of Automobile Manufacturers, to ensure that the quality standards of wire harnesses are consistent with industry standards.
3、 Based on the actual production situation
Production process: Consider the feasibility and stability of actual production processes to ensure effective implementation of standards in actual production.
Equipment conditions: Based on the production equipment and technical capabilities of the enterprise, develop reasonable testing methods and requirements to ensure the accuracy and reliability of the testing results.
4、 Develop detailed quality standards
The quality standards for automotive wiring harnesses usually include the following aspects:
Appearance and size:
The appearance of the wiring harness should be neat, without obvious deformation, damage, or scratches.
The color of the wiring harness should be consistent with the design requirements.
The length, diameter, and bending radius of the wiring harness should meet the design requirements.
The processes of cutting lines, grouping, and peeling the outer skin should meet the corresponding standards.
Electrical performance:
The conductor resistance, insulation resistance, and withstand voltage strength should meet the requirements of relevant standards.
The wiring harness connection should be sturdy and reliable, without any looseness or detachment.
The connector should be intact, without deformation or damage.
Electrical performance parameters such as wire resistance and insulation resistance need to be verified through appropriate testing equipment.
Mechanical properties:
The tensile resistance and vibration resistance should meet the requirements of relevant standards.
The wiring harness should maintain good structural integrity and electrical connection performance during stretching and vibration processes.
Environmental adaptability:
The environmental adaptability tests such as moisture resistance and salt spray resistance should meet the requirements of relevant standards.
The wiring harness should be able to maintain stable performance and safety under harsh environmental conditions.
Flame retardant performance:
Flame retardant performance is an important indicator for measuring the safety performance of wire harnesses in fires.
Conductor materials and insulation materials with flame retardant properties should be selected, and the structural design of the wiring harness should be ensured to be reasonable.
Environmental requirements:
The wiring harness should meet environmental requirements, such as non-toxic, harmless, low noise, etc.
During the production process, environmentally friendly materials should be selected and pollution to the environment should be reduced.
5、 Clearly define the inspection methods and tools
Inspection method: Develop detailed inspection steps and procedures, including visual inspection, dimensional measurement, electrical performance testing, mechanical performance testing, and environmental adaptability testing.
Inspection tools: Clearly define the required inspection tools and equipment, such as electric bridges, resistance meters, insulation resistance meters, tensile testing machines, etc., and specify their calibration and maintenance requirements.
6、 Develop measures and accountability mechanisms for handling non-conforming products
Handling measures: Clarify the handling methods for non-conforming products, such as rework, repair, downgraded use, or scrapping.
Accountability: Establish a accountability mechanism to trace and analyze the causes of non-conforming products, and hold relevant responsible persons accountable and punished.
7、 Regularly evaluate and update standards
Assessment: Regularly evaluate the implementation of wire harness quality standards, collect feedback and improvement suggestions.
Update: Based on the evaluation results and the needs of technological development, revise and update the quality standards for wiring harnesses to ensure their adaptability and effectiveness.
In summary, the formulation of quality standards for automotive wiring harnesses is a systematic project that requires comprehensive consideration of multiple factors and adherence to certain processes and principles. By establishing scientifically reasonable quality standards for wiring harnesses and strictly implementing them, the quality level of wiring harnesses can be effectively improved and the performance and safety of automotive electrical systems can be guaranteed.
