CNC lathe how to rework thread:
The specific steps for rethreading on the control lathe are as follows:
1. Stop the tool tip at the position of x35,z5 with manual operation, and set x,z to zero.[The actual tool position after zero is 5mm backward from the program position, and the workpiece is not cut when running the program]
2. With the lathe at the lowest speed automatically run a car rib program, in the operation to observe whether the tool corresponds to the groove of the original rib, then the tool is only on the outside of the workpiece ×30 empty line.[Generally not on, you mainly observe how much it is off, such as the Z-axis is left 1mm.]
3. After the completion of the program, the tool tip goes to the origin x30,z5. Change hands to move the Z-axis to place the tool tip in the position of z6, and the Z-axis is set to zero.[x30 here is the numerical control display value, the actual tool tip is in x35]
4. Continue to automatically run the ribbing program [low speed], this time the Z-axis position may have been aligned with the groove of the original workpiece, but the x direction has not been cut to the workpiece.
5. After the program is completed, the tip of the knife goes to the origin x30,z5[because of the previous zero, the Z-axis is already the zero point in the program]. Manually change the position of the tool tip to x27[the actual position of the tool tip is x32] and set the X-axis to zero.
6. Continue to automatically run the car rib program [low speed], this time you can see the cutting workpiece, although the cutting is not much, but you can see whether the whole process needs to be adjusted. After the program is completed, the tool is zeroed to show x30,z5.[The actual tool coordinates are x32,z5] to the next step.
7. Without finishing the previous step, manually move the x axis forward to the actual x30 position,[Move the 30 displayed on the x axis to x28], and set it to zero.
8. Adjust the lathe to normal speed and run the ribbing program once. Job done.