CNC lathe operation of the knife way
2018-11-07
In CNC turning, the machining origin of the part should be determined first to establish an accurate machining coordinate system, and the influence of different sizes of the tool on the machining should be considered. All these need to be solved through the knife.
1, the general knife
The general tool refers to the use of relative position detection on the machine tool manual tool. The following is an example of Z-direction tool alignment, as shown in Figure 2.11.
After the tool is installed, first move the tool to manually cut the right end face of the workpiece, then retreated along the X direction, and input the distance N between the right end face and the machining origin into the numerical control system, thus completing the Z-direction tool setting process of the tool.
Manual tool setting is the basic tool setting method, but it still does not jump out of the "trial cutting-measurement-adjustment" tool setting mode of the traditional lathe, taking up more time on the machine tool. This method is backward.
2. The essence of the off-machine tool set is to measure the distance in X and Z directions from the imaginary tool point to the tool table datum. Using the off-machine tool setting instrument, the tool can be calibrated outside the machine tool in advance, so that the tool setting length can be input into the corresponding tool compensation number after the machine tool is installed.
3, automatic knife
The automatic tool setting is realized by the tool tip detection system. The tool tip approaches the contact sensor at a set speed. When the tool tip contacts the sensor and sends a signal, the numerical control system immediately records the coordinate value of the moment and automatically corrects the tool compensation value.
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