In August and September of 2011, China Shouqi Truck Co., Ltd.'s car body factory high-level electrical harness installation problem research group, made substantial progress in the improvement of the online harness.
For a long time, the problem of reliability of wiring harness installation in high-roof cabs has not only affected the production cycle of the interior and final assembly of China National Heavy Truck Trucks Co., Ltd., but also was the root cause of abnormal noises and electrical faults in the initial period of the entire vehicle.
In order to completely solve such problems, since 2011, Sinotruk Trucks Co., Ltd.'s bodywork factory has received market feedback, repeated investigations, on-site confirmation, and cause analysis, focusing on the establishment of a high-level electrical wiring harness installation problem research team, from the marketing department, the assembly line, and To the auto body factory, the investigation followed the root cause of the problem.
After lean combing, the Sinotruk truck body found that the biggest problems are likely to appear in the air horns, the top lining gated switch harnesses, the front high lights, and the miscellaneous front feeders. These seemingly minor problems are In the market, it often annoys users and seriously affects the overall quality of CNHTC products. In this regard, China National Heavy Truck Truck Co., Ltd.'s auto body is determined to completely eliminate and guarantee that such a timelessness will not occur.
In the first step, after revisiting and verifying the air horns, the Automobili Plant has strengthened the process of adding wire harness fixing plates to the inner wall of the top cover to successfully solve this type of problem. Through repeated strengthening and aging tests, the research team has successively The most suitable fixing plate was made. After relevant process verification and mass improvement, the actual installation and use effect was very good.
In the second step, the Automakers Plant actively contacted the manufacturer to confirm the quality status of the top lining switch control wiring harness, and reported to the Ministry of Technology to unify the tying method of this part through further communication with the manufacturer. At the same time, it also dispatched someone to coordinate on-site at the assembly line to confirm the reserved length of the left and right gate control switch lines, and formulated a unified standard for enhancing the quality of the process.
The third step, the car body found that: operators in the pre-cut cable bundles easily cause damage to the harness, after discussion and verification, the team members actively boldly increase the length of the harness, this improvement was recognized by the on-site operator. The feedback was completely convenient for the interior assembly and was approved by the CNHTC Technical Center. The drawings were officially revised at the end of March 2011.
In the fourth step, the carbody factory also has a length identification along the direction of the harness along the terminal of the harness feeder. This identifier not only facilitates the on-site operator to control the assembly accuracy, but also limits the drawstring and the feeder to the miscellaneous goods box. The intensive tying in the interior fully realizes the perfect fixing scheme of the feeder line at the top of the high top wiring harness, and has been verified and approved by the CNHTC Technical Center.
After two months of continuous testing, China National Heavy Truck Trucks Co., Ltd. has not received any feedback on the quality of high-end electrical wiring harnesses. At the same time, the strengthening process of high-end electrical wiring harnesses was officially incorporated into the China National Heavy Duty Truck assembly. Department, General Assembly Department II, and body factory's "Assembly Inspection Operation Instructions."
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