The principle of not moving parts after positioning in the fixture

Choose the direction of the clamping force to point to the positioning datum (a datum), and the magnitude of the clamping force should be sufficient to balance the influence of other forces and not cause the parts to move during the processing. The principle of non-deformation after the parts are positioned in the fixture. Under the action of the clamping force, the parts will not be deformed during the machining process that is not allowed by the accuracy. The appropriate clamping position must be selected and the contact state of the pressure plate and the part must be adjusted. , Apply proper pressing force.　　The principle of non-vibration after the parts are positioned in the fixture.　　Ensure the rigidity of the support and clamping system. The clamping position should be as close as possible to the processing area of u200bu200bthe part to avoid vibration of the part and clamping system. Generally speaking, for the fixtures used for rough machining, the larger clamping force should be selected, mainly considering the principle of non-movement of the parts. Principle of vibration.