For CNC machine tool tool compensation, it not only greatly improves the accuracy of machined parts, but also has a certain cooling effect on the tool itself, effectively ensuring the service life of the tool. However, when operating tool compensation, there are many systems that require very high operating experience. Today, our CNC lathe manufacturer will explain the precautions for CNC lathe tool compensation operation.
When manufacturing workpieces on CNC machines, it can be clearly seen that the tool center motion trajectory does not coincide with the workpiece contour, because the workpiece contour is formed by the tool motion envelope. In CNC machining, whether to program according to the contour size of the workpiece or the motion trajectory size of the tool position depends on the specific situation. The key point of this problem is that you need to look at the machining plane against the third axis. Looking against the y-axis towards the machining plane xz of the CNC lathe, along the cutting direction, the tool is supplemented with G41 on the left side of the workpiece and G42 on the right side. Taking the top view of a horizontal lathe as an example, the former is a rear tool holder, and in reality, the y-axis is vertically upward, with the diagram pointing outward from the paper.
The principle of tool compensation for inclined and flat CNC lathes is not different, but the inclined rail tool holder is a rear mounted tool holder, while the flat rail is a front mounted tool holder. If you stand in front of the machine tool and feel that the two coordinate systems are in opposite directions on the X-axis and imaginary axis Y, it is judged that using G02 and G03 is opposite. As for the moving speed, it has nothing to do with the inclined and flat rails of the machine tool. After compensating for the radius of the tool tip arc, the tool will automatically deviate from the contour radius of the part by a certain distance. First observe along the positive direction of the Z-axis towards the negative direction, and then observe along the direction of tool movement. If the tool is on the left side of the workpiece, use G41, otherwise use G42. G41 is used for outer circle processing, G42 is used for inner hole processing. Therefore, the radius size of the blade tip arc must be input into the system.
The tool compensation function is a function used to compensate for the difference between the actual installation position (or actual tip radius) of the tool and the theoretical programming position (or tip radius). After using the tool compensation function, changing the tool only requires changing the tool position compensation value, without changing the part machining program. Tool compensation is divided into tool position compensation and tool offset compensation. Answer for CNC lathe tool compensation direction: Cancel the tool radius compensation command. Due to the fact that the CNC program of a CNC lathe machining machine is designed for the tool position points, namely point A or point O, on the tool, it is necessary to align this point with the starting point in the program during tool alignment. In the absence of tool arc radius compensation function during CNC lathe machining, the programmed point will move according to the programmed trajectory, resulting in over cutting or over cutting.
The above are the precautions for CNC lathe tool compensation operation compiled and released by our CNC lathe manufacturer. We hope that the above explanation can be helpful for everyone when performing tool compensation operations in the future.