1, the fixture should have enough rigidity;

2. Have sufficient stability;

3, there should be enough measurement accuracy to ensure the quality of the car;

4. The operation should be convenient to ensure sufficient measurement efficiency;

5, the structure should be as simple as possible;

6. Have a good appearance;

7, should have enough economic guarantee, in order to control the cost of vehicles;

8. At the same time, it should be convenient for measurement and calibration.

Extended data:

Main contents:

1. Generally speaking, in the industrial production process, all the auxiliary devices and tools that make any processing procedure accelerated, convenient or safe can be called fixtures.

2. The generalized fixture includes mechanical fixture, pressure fixture, heat treatment fixture, welding fixture, assembly fixture and so on.

3. The narrow sense of fixture generally refers to machine fixture, which can be referred to as fixture. Mainly used for machine processing, but also a bridge between machines, workpieces and tools. At present, it is generally defined as "a device tool for clamping workpieces" as a fixture. The "device tool used to clamp the workpiece and cooperate with the guide tool" is called a fixture or fixture.

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