How to solve the abnormal sound of automobile door 1 First of all, we need to prepare the tools that may be used, such as screwdriver, t-20 spline, car rust inhibitor and butter for car maintenance. Next, we begin the wonderful solution process.
2. Abnormal sound generated when the wiring harness in the door touches the door panel. When the vehicle runs on the bumpy road, it may cause the wiring harness in the door to touch the door panel, thus generating waves of noise. What we need to do is to disassemble the door trim and fix the wire harness inside. It's best to find a small sponge and stick it on the door where the harness is located, so that there will be no noise when the harness touches the sponge.
3. Abnormal sound caused by the cable in the door hitting the door panel. When the cable in the door touches the door panel, the sound is still obvious. What we need to do is to disassemble the door trim panel first, and then wrap the cable inside the door with a small sponge, so there is no noise, which is one of the reasons for the abnormal sound of the car.
4. The door sealing strip makes abnormal sound. When the door sealing strip is used for a long time, the sealing strip itself will gradually age, and there will be some friction between the door sealing strip and the body, so that abnormal noise may occur when the vehicle is driving. Please check the sealing strip of your vehicle and replace it with a new one when there is a problem, so that the problem of abnormal sound of the door will be solved.
5. Abnormal sound generated by the door itself. The reason for this problem is that the door lock column is installed outside, which leads to the door itself not being very close to the body. At this time, we need to adjust the door lock pillar inward, bit by bit, until the door and body are closely combined.
6. The door hinge makes abnormal sound. When the hinge is used for a long time, it will greatly increase its friction and then produce abnormal noise. So what we need to do is to take out the car rust inhibitor, spray some car rust inhibitor on the hinge, and then apply a little butter, so that the friction will be greatly reduced and the abnormal sound of the door will be gone.
7. The door stopper makes an abnormal sound. If the door stopper is not maintained regularly, it will also make the door sound abnormally. What we need to do is to coat some butter and spray some anti-rust agent on the car, so that the friction of the door stopper will be greatly reduced and the abnormal sound of the door will be solved.
8. The door glass sealing strip generates abnormal noise due to friction. The glass sealing strip may be dislocated for a long time, which may cause abnormal noise during the driving of the vehicle. After this happens, all we have to do is fix the door sealing strip by hand and put it back in its place, so that the abnormal sound of the door will be gone. We can solve it according to our own vehicle specific analysis!
Repair method of automobile door panel 1. Preparation before repair of automobile door panel
Wear of labor insurance articles. Labor protection articles can ensure the personal safety of door panel maintenance operators at work. Labor protection articles worn during operation include masks, goggles, working caps, earmuffs and cotton gloves. Determine the damaged area. Check the damaged area and draw the damaged area with a marker. In this way, we can better ensure that the repaired area is not too large or too small.
Second, the repair of door panels that are not seriously damaged.
Grind the damaged area. Grind the old paint film with a grinder. Stick the No.80 sandpaper on the grinding head of the disc grinder, and pay attention to the hole of the sandpaper corresponding to the hole of the grinding disc, so that the dust generated by the old paint film will be packed in a vacuum bag during grinding. When polishing, always keep the grinder at a certain inclination angle with the workpiece surface, and exert pressure on the grinding disc to polish the old paint film as soon as possible. It should be noted that the depression in the directly damaged area is deep, and it may not be completely polished by simply using a grinder. At this time, it is easier for us to use the belt sander to polish the directly damaged area, and the belt sander can also clean other unfinished surface areas. Until there is no old paint film on the surface of the area to be repaired.
Using meson machine to repair. When using meson machine, fix the ground wire first, and then weld it. Because the adjustable parameters of meson machine are too loose, it is necessary to adjust an appropriate current and appropriate power-on time that are most suitable for this maintenance. This process needs to be adjusted three to five times to find the most suitable parameters.
When welding, we should always follow the principle that the local repair of the body surface should be from the inside out, from large to small, from strong to weak, from rebar to rebar. (Suggestion) Because of the different indentation depth and personal skills in meson operation (referring to the understanding and application of pull-down and lift-up technology), we should operate flexibly at different levels according to the changes of panel repair without violating the operation principle. It is suggested to draw the first damaged part (referring to the indirectly damaged area) and draw a straight line.
Turn off the fire. To turn off the fire, remember to do it every time. This is a phenomenon, because of the increase of surface area, the surface of the board is convex, or you can press it gently with your hand and then release the pressure of your hand, and its surface will bounce freely. At this time, you must restore it to its original state with a torch. Using the single point heating of the electrode tip and the dust gun, a small area of fire can be cooled quickly and its surface area can be forcibly restored to its original state. It is not easy to set a fire at a point repeatedly.
Cleaning and inspection. Clean the surface and check the workpiece, clean the surface with a grinder, polish off the carbon damage caused by wire drawing on the surface, and clean the dust on the surface with a dust gun. Measure the surface repair with a steel ruler. The surface we repair must not be less than 1mm of the original surface. There must be no high point We must make the surface we repair clean and dust-free. There shall be no carbon damage in the repaired surface area. If each of the above defects occurs, it must be repaired as required.
Third, it is used to repair door panels with serious local damage.
For the local area of the door panel, due to corrosion or collision, the local area of the door panel (such as corrosion holes, etc.). ) can't be repaired by the door panel repairer, only by replacing the panel.
Stop. Use plasma cutting machine or cutting saw to cut the local door panel that needs to be replaced. When cutting, pay attention to the cutting range as small as possible, so as not to hurt other nearby parts, not to mention the door panel stiffener.
Repair. Make a repairable plate, spot weld it continuously with inert gas shielded welding, and weld the plate to the door panel. When welding, be careful not to penetrate too deep, and don't make the weld mark too big, so as to minimize the heat during welding. Then use a grinder to smooth the welding place, and no high points can appear.
Fourth, repair the badly damaged door panels in most areas.
When the damaged area of the door panel is relatively large, if the method in 3 is used for repair, the service performance of the door panel is likely to be reduced. Therefore, in view of this situation, it is recommended to replace the entire door panel.
Remove the old boards. First, separate the solder joints. Primer, protective layer or other covering can be removed by oxygen-acetylene flame torch, wire brush and grinding wheel. If the spot welding position is still not visible, chisel a spot between the two plates so that the spot welding profile can be displayed. Drill off the spot welding spot with the spot welding cutting tool. Be careful when separating, and don't cut the plate under the weld. Stick the steel tape on the door frame and measure the distance between the lower edge of the tape and the edge of the outer plate. Also measure the distance between the front or rear edge of the panel and the door frame for later installation. Then use a plasma cutter or grinding wheel to saw off the welded part of the outer door frame connecting the outer side. The quickest way to remove the door outer panel is to grind off the edge of the crimping flange. Only by grinding off enough metal plates can the flange be separated. Do not grind the inner panel. Remove the stiffener at the top of the panel (if it is installed or used). Gently loosen the two panels with a hammer and chisel. Use iron scissors to cut off any solder joints that cannot be drilled or polished. When the outer plate can move freely, remove the outer plate. Remove the remaining part of the inner flange with a vice or flat-nose pliers. Grind off any residue of spot welding, brazing, brazing and rust with a disc grinding wheel.
When removing the outer panel, carefully check whether the inner panel and door frame structure are damaged. If necessary, correct or repair the damage of the left inner door panel at this time. Repair the dent on the inner flange with a hammer or jacking iron. Conductive antirust primer should be used in any spot welding area. Other exposed metal surfaces should be coated with antirust primer or treated by other antirust methods.
Install the new panel. Prepare the new panel to be installed, and punch holes with a drill or punch for plug welding. Use a grinder to remove paint from welding and brazing. Apply a penetrable coating on the exposed metal welding area and a primer on the exposed metal area. Some car door outer panels are equipped with muffling pads. It is adhered to the door outer panel with adhesive. To do this, use alcohol or its solvent to clean the outer panel. Heat the outer panel and the muffler pad with a heating lamp, and then stick the muffler pad to the outer panel. Before installing a new panel, apply body sealant to the rear edge of the panel. Apply sealant evenly at a distance of 0/8mm from the flange/kloc-with a thickness of 3mm. ..
Connect the new outer panel to the door with a vise and position it correctly. Bend the flange of the outer panel with a hammer and a top iron, and cover the surface of the top iron with a cloth tape to avoid damaging the panel. Gradually bend the hem. Tap the edge of the panel carefully, and don't make it go beyond the quasi-straight line. Warp and wrinkle will not occur on the whole contour line of the outer plate. When the processed flanging and the inner panel are bent within 30 degrees, the flanging tool is used to complete the flanging. When folding the edge, be careful not to deform the panel.
Plug welding or resistance spot welding shall be used to weld the solder joints on the glass window opening. Apply body sealant to the flange edge, and apply rust inhibitor to the spot welding and plug welding areas. Drill holes in the new panel to install decorative strips, decorative pieces, etc. Put the door on the car to check its matching, and then remove the door for repair. Straighten the door and all adjacent panels, check whether they are accurately closed or locked, and check whether the gap between panels is accurate. Through the above method, the replacement operation of the door outer panel can be completed.
The repair type of automobile door deformation is 1, and the dent is relatively small and regular in shape, so dent repair can be considered.
2, the deformation is serious, and the iron gate can be shaped.
3. The aluminum alloy door with severe deformation needs to be replaced with new parts, that is, it is barely plastic, and the effect is not good!
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