Tool setting method for a CNC lathe

Before CNC lathe processing, in order to ensure smooth processing and improve the processing accuracy, the origin of the workpiece should first be clarified, the processing coordinate system should be accurately set, and the size and deviation of the relative position of various tools should be comprehensively considered. Then, various processing operations can be carried out on the workpiece, and all of the above work is inseparable from the tool setting. Only the accurate tool setting can create a good condition for subsequent processing, ensure the machining accuracy of the workpiece, and improve the efficiency of CNC machine tools. In order to smoothly achieve this goal, it is necessary to master the correct tool setting method. In general, the commonly used tool setting methods include the following.

General tool setting method. The general tool setting method is very common in actual work, which refers to the manual tool setting using the relative position detection on the machine tool. Taking the Z-axis tool setting as an example, the specific operation method is as follows: first set the tool, then move the tool to manually cut the right end of the workpiece, then retract the tool along the X-axis, and input the distance between the right end and the processing origin into the CNC system to complete the tool setting process.
Automatic tool setting method. This method is realized by the tool tip detection system. The tool tip approaches the touch probe at a predetermined speed. The tool tip contacts the probe and sends out a signal. The CNC system immediately records the coordinate value at this moment and automatically adjusts the tool compensation value. The main components required to complete the whole tool setting process include the spindle, the tool holder and the touch probe. This method is easy to operate and can automatically complete the tool setting process, which is conducive to improving the processing accuracy of the product. Its application is becoming more and more extensive.
Tool setting by off-machine tool setting tool. The essence of this method is to measure the distance between the imaginary point of the tool tip and the reference point of the tool table in the X and Z directions. With the off-machine tool setting tool, the tool is pre-calibrated outside the machine. Through this method and steps, good conditions for subsequent processing and production are created. In actual work, after the machine tool is set up, the tool setting length is entered into the corresponding tool compensation number, and it can be used at any time to meet the processing and production needs of the workpiece, laying the foundation for the smooth development of subsequent work.
The method of setting the trial cutting tool. On the one hand, the basic coordinate system is set by trial cutting the workpiece with the reference tool. Cut along the A surface manually. If the Z axis is not supported, release the tool along the X axis and stop the spindle rotation. Input G50Z “β”, set the Z coordinate to “β”, and set the Z offset number = “β”. Cut along the β surface manually. When the X axis does not move, release the tool along the Z axis and stop the spindle rotation. Measure the distance “α”, input G50X “α”, set the X coordinate to “α”, and set the X offset number = “α”. On the other hand, set the offset of the non-reference tool. This workflow is the same as setting the basic coordinate system. There are certain differences in the setting of the offset number. Measure the distance “β” between surface A and the zero point of the coordinate system and set it to the offset number Z. At the same time, measure the distance “α” and set it to the offset number X. The offset number = the offset number of the offset being set + 100.