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Common faults and repair methods of automobile plastic parts

Update:05-03-2021
Summary:

 The function of the clutch system is to ensure that th […]

 The function of the clutch system is to ensure that the engine and the transmission system are smoothly engaged and can be temporarily separated. Engagement refers to the generation of friction torque, and separation refers to the release of friction torque. The clutch works frequently. When the car is running, due to sliding friction, various parts are easy to wear, deform or break, etc., and the friction torque is correspondingly reduced, causing problems in the clutch system.
   During the use of the clutch, the main problems that often occur are the clutch pedal heavy, slipping, separation (difficulty in gear shifting), shaking, rushing, abnormal noise, etc. The problem of the heavy clutch pedal is the cause of the phenomenon. The clutch pedal is heavy and the feet are prone to fatigue. Compared with the same other vehicles, the clutch pedal force is obviously different. Reasons for the problem: (1) Separate the master cylinder assembly: improper adjustment, too high pedal, and no idle stroke. (2) The driven disc (friction plate) assembly: the friction plate wears a lot (wear to the rivet of the friction plate). (3) The clutch master cylinder, the sub-cylinder, the release bearing, etc. are issued, and the movement is not flexible. (4) The flywheel working surface and the pressure plate working surface are worn out (abrasion exceeds 0.5mm). (5) The separation refers to excessive wear (the circular arc of the finger end has been ground), and the excessive wear of the separation bearing (the concave arc is ground on the thrust plane).
  The maintenance methods of automobile plastic parts are as follows:
   1. Inspection: Through inspection, determine the deformation and damage of automobile plastic parts.
  2. Fastening: Fastening is an important maintenance operation to prevent loose parts. The necessary tightening and replacement of automobile plastic parts should be made.
  3. Clean: the basis for reducing the wear and tear of automobile plastic parts and reducing energy loss.
  4. Adjustment: Adjustment work is the key to ensuring the long-term normal operation of automobile assemblies and automobile plastic parts.
  5. Replenishment: Replenishment refers to the replenishment of lubricating oil and special working fluids in the car maintenance, so as to enhance the service life of the car assembly and various parts.
Repair and maintenance methods
The basic method of repairing car scratches: Deep or shallow scratches on the surface of the car are always accompanied. The depth of the scratches is distinguished by whether the scratched part is exposed or not. The primer is called deep scratches. , Otherwise known as shallow scratches. If there is a deep scratch, the exposed metal will quickly rust and extend to the edge of the scratch, increasing the difficulty of repairing.
   lacquer pen repair method: Use a lacquer pen of similar color to smear the scratched area. This is the lacquer pen repair method. This method is relatively simple, but the adhesion of the paint on the repair site is not enough, it is easy to peel off and difficult to last.
   Spraying method: This is to repair the scratches by the traditional touch-up method. The main disadvantage is that the damage area of ​​the original paint is relatively large, and the repair time is relatively long, and the effect is difficult to achieve.
Computerized paint spraying method: Combining computerized paint mixing and using a new process method to repair deep scratches. This is a fast technical repair of automobiles, but the main requirement is that the color can be accurately deployed and the repaired area is as large as possible After shrinking, and then treated with a special solvent, the new and old topcoats can be better integrated to achieve adhesion.

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