This is a auto parts checking fixture according to the parts testing requirements to design, precision machining. Plastic is a polymer material with resin as the main component. Resin is divided into natural and synthetic two categories, plastic synthetic resin, according to the use of plastic can be divided into general plastics, engineering plastics and special purpose plastics. Plastic instrument is rich in sources, low cost, and has the advantages of low density, high specific strength, good insulation performance, chemical stability, vibration reduction and wear resistance.

The b-pillar is the pillar between the driver's side window glass and the rear side window glass, and its main function is to withstand side impacts. However, there is not enough energy-absorbing area on the side of the body, so for the B-pillar, sufficient strength and rigidity are important factors to ensure the safety of the driver in the event of a side collision of the vehicle. Therefore, the quality inspection of the car b-pillar is particularly important