Give it a try! Seven methods for improving machining accuracy of CNC machining center

The machining accuracy of the cnc machining center refers to the degree to which the practical parameters (scale, shape and orientation) after the parts are processed and the aspiration parameters match. The difference between them is called a processing error. The size of the processing error reflects the unevenness of the processing accuracy. The larger the error, the lower the accuracy of the CNC machining center, and the smaller the error, the higher the processing accuracy. The following briefly introduces the ways to improve the machining accuracy of the workpiece:

1. Adjust the process system

(2) The adjustment method obtains the required scale by adjusting the relative orientation of the machine tool, fixture, workpiece and tool in advance. This method has a high yield and is mainly used for mass production in large quantities.

Second, reduce machine errors

(2) Improve the accuracy of the bearing parts: ① Improve the machining accuracy of the box support holes and the main shaft journal; ② Improve the machining accuracy of the outer surface matched with the bearings; ③ Measure and adjust the radial runout of the corresponding parts to make errors Compensate or offset.

(4) Make the spindle reverse accuracy not reflected on the workpiece CNC machining center

3. Reduce transmission chain transmission errors

(2) The use of down-speed transmission is an important criterion to ensure the accuracy of the transmission, and the closer to the end of the transmission pair, the smaller the transmission ratio;

(1) The tool must be sharpened before the tool scale wear reaches the sharp wear stage

(3) The tool material should meet the technological requirements

Fifth, reduce the mechanical deformation of the process system

(2) Reduce load and change

Sixth, reduce the thermal deformation of the process system

(2) Equilibrium temperature field

(4) Accelerate to reach heat transfer equilibrium

(1) Add heat treatment process to eliminate internal stress;

(2) Arrange the process of cnc processing center reasonably.