Some tips for CNC machining programming will be useful to learn!
In the machining process of the CNC machining plant, it is very important to avoid the collision of the CNC machining plant when programming and operating the machining. Because the price of CNC processing plants is very expensive, ranging from hundreds of thousands of yuan to millions of yuan, the maintenance is difficult and the cost is high. However, the occurrence of collisions has certain rules to follow and can be avoided, which can be summarized as the following points.
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 in a preliminary inspection program to observe the movement of the tool to determine if a collision is possible.
2. Utilize the simulation display function of CNC processing factory
Generally, more advanced CNC processing plants have graphic display functions. 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. Utilize the dry running function of CNC processing plant
The correctness of the tool path can be checked by using the dry run function of the CNC machining plant. When the program is input into the CNC processing plant, the tool or workpiece can be installed. If you want to learn UG programming, you can get the introductory materials in the group 565120797, and then press the dry run button. At this time, the spindle does not rotate, and the worktable runs automatically according to the program track. You can find out if the tool is likely to collide with the workpiece or 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. Utilize the locking function of the CNC processing plant
General CNC machining plants have 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 coordinate system and tool compensation should be correct
When starting the CNC machining plant, be sure to set the CNC machining plant reference point. The working coordinate system of the CNC machining factory 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 tool length compensation is set correctly, otherwise, either an empty machining or a collision occurs.
6. Improve programming skills
Programming is a crucial part of CNC machining, and improving programming skills can largely avoid unnecessary collisions.
For example, when milling the inner cavity of a workpiece, when the milling is completed, the milling cutter needs to be quickly retracted to 100mm above the workpiece. If N50 G00 X0 Y0 Z100 is used to program, the CNC machining factory will link the three axes, and the milling cutter may be connected to the workpiece. Collision occurs, resulting in damage to the tool and the workpiece, which seriously affects the accuracy of the CNC machining factory. At this time, the following program can be used: N40 G00 Z100; N50 X0 Y0; that is, the tool first retreats to 100mm above the workpiece, and then returns to the programmed zero point, so that it will not collision.
In short, mastering the programming skills of the processing plant can better improve the processing efficiency and processing quality, and avoid unnecessary errors in processing. This requires us to continuously sum up experience and improve in practice, so as to further strengthen programming and processing capabilities
