What are the operating precautions of CNC machining center

  • After the workpiece is clamped on the machining center once, the digital control system can control the machine tool to automatically select and replace the tools according to different procedures, and automatically change the spindle speed, feed, and the motion path of the tool relative to the workpiece and other auxiliary functions. Multi-process machining on several surfaces of the workpiece, and multiple tool change or tool selection functions, so that the production efficiency is greatly improved. In the process of using the CNC machining center, one thing is very important, that is, when programming and operating the processing, we must avoid the collision of the machine tool. The following introduces the safety operation precautions of CNC machining center:

    1. Using computer simulation system
    With the development of computer technology and the continuous expansion of CNC machining teaching, there are more and more CNC machining simulation systems, and their functions are becoming more and more perfect. Therefore, it can be used for preliminary inspection procedures to observe the movement of the tool to determine whether there is a possible collision.

    2. Utilize the analog display function of the machine tool
    Generally more advanced numerical control machine tool graphics display function. After inputting the program, you can call the graphic simulation display function to observe the movement track of the tool in detail, so as to check whether the tool may collide with the workpiece or fixture.

    3. Utilize the dry run function of the machine tool
    The dry run function of the machine tool can be used to check the correctness of the tool path. After the program is input to the machine tool, you can install the tool or workpiece, and then press the dry run button. At this time, the spindle does not rotate, and the worktable automatically runs according to the program path. At this time, you can find whether the tool may collide with the workpiece or fixture. However, in this case, it must be ensured that the tool cannot be installed when the workpiece is installed; when the tool is installed, the workpiece cannot be installed, otherwise collisions will occur.

    4. Use the lock function of the machine tool
    General CNC machine tools have a lock function (full lock or single-axis lock). After inputting the program, lock the Z-axis, and judge whether there will be a collision by the coordinate value of the Z-axis. The application of this function should avoid operations such as tool change, otherwise the program cannot be passed.

    5. The coordinate system and tool compensation settings must be correct
    When starting the machine tool, the machine reference point must be set. The working coordinate system of the machine tool should be consistent with the programming, especially the Z-axis direction. If there is an error, the possibility of the milling cutter colliding with the workpiece is very high. In addition, the setting of tool length compensation must be correct, otherwise, it is either empty machining or collision.