How to choose a fixture?

Selection of fixtures

The characteristics of CNC machining put forward two basic requirements for the fixture. One is to ensure that the coordinate direction of the fixture and the coordinate direction of the machine tool are relatively fixed; the second is to ensure the accurate dimensional relationship between the part and the machine tool coordinate system.

According to the state of the parts wool and the installation requirements of the CNC machine tool, the fixture that can guarantee the processing quality and meet the processing needs should be selected. In addition, the following points should be considered:

(1) When the processing volume of parts is not large, combined fixtures, adjustable fixtures and other general fixtures should be used as much as possible to shorten production preparation time and save production costs. In batch production, special fixtures can be considered, and the structure of fixtures is simple.

(2) The clamping parts should be convenient and reliable, avoid the manual adjustment of the clamping machine to shorten the auxiliary time, and try to use hydraulic, pneumatic or multi-station clamps to improve production efficiency.

(3) The fixture used on the CNC machine tool must be able to be installed accurately, to ensure the relative position and size of the workpiece and the machine tool coordinate system, and strive to unify the design reference, process reference and programming origin to reduce the reference misalignment error and CNC programming Calculation workload.

(4) Reduce the number of clamping as much as possible, and complete the processing of all parts or most surfaces after one clamping to reduce clamping errors, improve the mutual position accuracy of the processed surfaces, and fully improve the efficiency of CNC machine tools the goal of.

Special crystal precision jigs are easy to install, one-time clamping, multi-process processing, save time and labor costs, and quickly improve production efficiency. Welcome to inquire: 13486082088