Dimensional control skills for stainlesssteel parts processing
Modify tool offset value to ensuredimensional accuracy
According to stainless steel parts machining manufacturers, whenthe workpiece error exceeds the workpiece tolerance due to the first toolsetting error or other reasons, and the processing requirements cannot be met,the workpiece can be modified to achieve the required size by modifying thetool compensation. The method to ensure the radial size is as follows:
Absolute coordinate input method
According to the principle of "largereduction, small increase", modify the tool compensation at 001～004. If theworkpiece size is larger by 0.1mm when cutting the groove with the No. 2cutting tool, and the tool compensation display at 002 is X3.8, you can enterX3.7 to reduce the No. 2 tool compensation.
Relative coordinate method
As in the above example, input U-0.1 at 002cutter compensation, and the same effect can also be obtained.
The same is true for the cnc operating of the axial size. Forexample, if you use the No. 1 external tool to machine a certain shaft segment,and the size is longer than 0.1mm, you can enter W0.1 at the 001 tool offset.
Semi-finish machining eliminates theinfluence of screw gap to ensure dimensional accuracy
According to the analysis of stainlesssteel parts processing manufacturers, for most CNCmachining, after a long period of use, due to the influence of the screwgap, the size of the processed workpiece often appears unstable. At this time,we can perform a semi-finishing process after roughing to eliminate theinfluence of screw clearance. For example, after rough machining the outercircle with No. 1 tool G71, you can input U0.3 at 001 tool compensation andcall G70 fine turning once. After stopping the measurement, input U-0.3 at 001tool compensation and call G70 fine turning again. . After this semi-finishedturning, the influence of the screw gap is eliminated, and the stability of thedimensional accuracy is ensured.
