Critical control points for the production of waterproof wire harnesses

In the application field of wiring harness, including automobiles, LED outdoor display screens, agricultural machinery and engineering machinery, etc., it is used in rainwater environment, so the waterproof performance of wiring harness is very important. This article introduces the control points of waterproof wiring harness process. First, the selection of waterproof connectors is to provide safe and reliable connection for machinery and equipment, so it is very important. Connectors with advanced waterproof structure design shall be selected, and the waterproof grade shall be greater than or equal to IPX7 protection grade. It is also necessary to select connectors produced by regular manufacturers to ensure strict quality management system, excellent processing and assembly accuracy, and multiple performance testing, so as to ensure the stability of waterproof performance of connectors. II. In the process of designing the wiring harness, the wire diameter of the wiring harness matched with the connector shall be controlled, and the wire diameter shall not be greater than or less than the diameter specified by the connector. III. Production process: The waterproof terminal must be crimped with a special crimping die, and the connected terminal must meet the relevant technical requirements. Heat shrink protection for welding points and wiring points: when welding iron points on the wire harness, the heat shrink sleeve must be used for protection. The heat-shrinkable tube shall not be pierced by the copper wire, and the copper wire must be completely wrapped. The heat shrinkable sleeve must also meet the relevant technical requirements. 4. Air tightness inspection An intelligent sealing detection system shall be used to detect the tightness of the waterproof wiring harness. The two ends of the wiring harness shall be connected to the corresponding molds and connected to the compressed air for pressure testing to determine whether the tightness is qualified. The test standard is as follows: Pressure measurement: 20 KPa Inflation time: 10 seconds Pressure holding time: 5 seconds Test time: 10 seconds Pressure loss: ≤ 0.05 kPa If the pressure loss is less than the specified value within the specified time, it indicates that the sealing performance is good, which can meet the requirements of waterproof wiring harness and meet the product performance. Many manufacturers have to inspect the electrical performance, sealing performance and appearance of each waterproof wiring harness to ensure the quality of the product. The design of waterproof wiring harness shall be carried out in strict accordance with the requirements, and the waterproof wiring harness from regular manufacturers shall be selected, and the waterproof wiring harness shall be produced in strict accordance with the waterproof wiring harness process, and the quality shall be strictly checked, so as to achieve qualified waterproof wiring harness products.

---------------------------------------------------------------------------------------------------

2、 on the World Trade Electronic Products Network Platform and Sales Product Profile: World Trade Electronic Products Network-professional agent/production/sales of various { connector | harness | cable products }; If you have relevant [connector | harness | cable products] procurement/purchase needs or want to buy/know what connector | harness | cable products solutions we can provide, please contact our business personnel below; if you have relevant [connector | harness | cable products] sales/resources and promotion needs, please click "Business Cooperation ←" to negotiate with the specialist!