In the machining process of the CNC machining center, it is very important to avoid the collision of the CNC machining center when programming and operating the machining. Because the price of CNC machining centers is very expensive, which ranges from hundreds of thousands of yuan to millions of yuan. The maintenance is difficult and the cost is high. However, there are rules to follow in the occurrence of collisions, which can be avoided. We summarize them as the following points.
1. CNC precision machining uses 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 in a preliminary inspection program to observe the movement of the tool to determine if a collision is possible.
2. Use the simulation display function of the CNC machining center
Generally, more advanced CNC machining center has graphics display function. When the program is input, the graphic simulation display function can be called to observe the movement path of the tool in detail, so as to check whether the tool may collide with the workpiece or fixture.
3. Use the dry run function of the CNC machining center
The correctness of the tool path can be checked by using the dry run function of the CNC machining center. When the program is entered into the CNC machining center, the tool or workpiece can be loaded. Then the dry run button can be pressed. At this time, the spindle does not rotate and the worktable runs automatically according to the program track. At this time, it is possible to find out whether the tool may collide with the workpiece or the fixture. However, in this case, it is necessary to ensure that when the workpiece is installed, the tool cannot be installed. When the tool is installed, the workpiece cannot be installed. Otherwise a collision will occur.
4. Use the locking function of the CNC machining center
General CNC machining centers have a locking function (full lock or single axis lock). After entering the program, lock the Z-axis and judge whether a collision will occur 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 setting of CNC precision machining coordinate system and tool compensation should be correct.
When starting the CNC machining center, it is necessary to set the CNC machining center reference point. The working coordinate system of the CNC machining center should be consistent with the programming, especially the Z-axis direction. If there is an error, the possibility of the milling cutter and the workpiece colliding is very high. In addition, the setting of tool length compensation must be correct, otherwise, it will either be empty machining or collision.
6. CNC precision machining improves programming skills
Programming is a crucial part of CNC machining, and improving programming skills can avoid some collisions to a large extent.
In a word, mastering the programming skills of CNC machining center can better improve the machining efficiency and machining quality, and avoid errors in machining. Continuously sum up experience in practice and improve continuously, so as to further strengthen programming and processing capabilities.