In order to meet the design requirements and consider the risk of extrusion noise, the design gap between the back door trim panel and the back door lock sheath is1.5 mm. Due to the large fluctuation of the injection process of the interior trim panel, the product size fluctuation error is 0.5 mm, and due to the influence of the assembly tolerance of parts, the gap between them fluctuates greatly, resulting in abnormal sound in the road test of the whole vehicle. Aiming at the problem of abnormal sound caused by extrusion of back door trim panel and back door lock sheath, on the premise of meeting the design requirements, in order to weaken or even eliminate abnormal sound caused by process and assembly errors, a circle of EPDM rubber foam is added at the matching place between back door trim panel and door lock sheath to reduce mutual extrusion of sheath and back door trim panel, thus eliminating abnormal sound.
2. Abnormal slapping of back door buffer block.
The back door buffer block has the function of supporting and buffering, which avoids the direct impact on the car body during the opening and closing of the back door and affects the service quality and service life. During the road test of the whole vehicle, the rear door vibrates slightly and makes an abnormal noise with the body. According to the abnormal sound of the rear door, from the design of the opening and closing parts, the design dimensions of the buffer block and the car body ensure the interference of1.5 mm. Due to the accumulation of vehicle manufacturing and assembly tolerances, the actual loading interference can not meet the design requirements, so the buffer block is required to have greater tolerance and lower hardness.
3. Abnormal vibration of rear spoiler
The rear spoiler assembly is fixed on the sheet metal of the rear door through buckles and bolts, and it is impacted during the opening and closing of the rear door and the bumpy road test, resulting in abnormal vibration. In view of the abnormal sound of the rear spoiler, because the contact area between the rear spoiler and the rear door sheet metal is large and rigid, it is necessary to add sponge strips on the contact surface of the rear spoiler to buffer the rigid contact with the rear door sheet metal; At the same time, the buckle fixing structure is cancelled, and the abnormal sound caused by loose clamping is eliminated.
4. The tail lamp harness is loose and abnormal.
The wiring harness of the rear combination lamp is arranged on the sheet metal of the rear door, and its direction is controlled by fixing the buckle and coiling, so as to avoid the product modeling structure and the abnormal loosening of the wiring harness due to unreasonable direction. In order to solve the problem of loose and abnormal sound of taillight harness, the direction of harness can be arranged reasonably and the design of harness perforation can be reduced. At the changing position of the wire harness, a fixed one is added, and at the same time an adhesive tape is added to ensure the safe distance between the wire harness and the sheet metal.