For Delong cab side panels, rear enclosed double wall construction, glass fiber, felt, foam can be filled in its cavity to increase the insulation effect. Sound waves in the penetration process, the reflection at the interface of several different media, the porous material portion is absorbed acoustic energy, noise can play an effective role. After the body sealing performance can be tested by ultrasonic leak detector, the ultrasonic generator is turned into an open area at the center of the cab, closed the door windows, outside the cab scanning ultrasonic receiver seal windows and doors, front wall and floor apertures place heavy truck cab, in order to find out more serious leak area. According to the test results, the bad check car doors seal sealing system design is reasonable, the sealing strip assembly is biased, to harness via joystick pieces should be strengthened through the hole using a sealing material, in addition to also ensure Sheet Metal assembly, welding precision parts to meet the requirements, the use of rubber seal coating should be in place. Heavy truck cab BIW main production processes for the production of stamping process using cab BIW sub-assemblies sheetmetal Jinan heavy truck cab assembly, and then use the various pieces of sheet metal welding process will connect China's heavy truck cab assembly, forming a floor assembly, assembly around the left and right side, front wall assembly, rear surround assembly, assembly, and other six functional roof assembly, final assembly and then use the six functional robot welding connection BIW assembly into the cab. Currently a heavy truck cab BIW about 150 to 200 pieces of sheet metal, sheet metal spot welds connecting these approximately 4000 to 6000, and now the sheetmetal to large-scale, holistic development, such as the overall top cover outer plate, whole front wall outer panel, after a whole wall outer panel, left and right side panels overall heavy truck cab outside panels, molding pressure of these parts are basically in more than 1,000 tons, for the manufacture of precision stamping dies, strength, stiffness other indicators put forward higher requirements. 4000 to 6000 will be so much sheetmetal spot in strict accordance with a certain relative position of the connection of the welding fixture positioning system and clamping system requirements are higher. China's heavy truck cab assembly, Jinan Yiu Cheung (certified), heavy truck cab provided by Jinan Yiu Cheung Trading Company. Jinan Yiu Cheung Trading Company (www.jinanyaoxiang.com) Shandong Jinan, engine assembly leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Jinan Yiu Cheung leadership with the staff warmly welcome all inquiries negotiations to create Jinan Yiu Cheung a better future.