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 increasingly perfect. Therefore, it can be used for preliminary inspection procedures, observing the movement of the tool to determine if there is a possibility of collision.

2. Utilizing the built-in simulation display function of CNC machining centers

Generally, more advanced CNC machining centers have graphic display functions. After inputting the program, the graphical simulation display function can be called to observe the movement trajectory of the tool in detail, in order to check whether there is a possibility of collision between the tool and the workpiece or fixture.

3. Utilizing the idle operation function of CNC machining centers

The idle operation function of CNC machining center can be used to check the correctness of the tool path. After the program is input into the CNC machining center, the tool or workpiece can be installed, and then the idle operation button can be pressed. At this time, the spindle does not rotate, and the worktable automatically runs according to the program trajectory. At this time, it can be discovered whether the tool may collide with the workpiece or fixture. However, in this case, it is necessary to ensure that cutting tools cannot be installed when the workpiece is installed; When installing cutting tools, the workpiece cannot be installed, otherwise collisions may occur.

4. Utilizing the locking function of CNC machining centers

Typical CNC machining centers have locking functions (full lock or single axis lock). After entering the program, lock the Z-axis and determine whether a collision will occur based on the coordinate values of the Z-axis. The application of this function should avoid tool changing and other operations, otherwise the program cannot pass.

5. The setting of coordinate system and tool compensation must be correct

When starting the CNC machining center, it is necessary to set the CNC machining center reference point. The working coordinate system of a CNC machining center should be consistent with the programming, especially in the Z-axis direction. If there is an error, there is a high possibility of the milling cutter colliding with the workpiece. In addition, the setting of tool length compensation must be correct, otherwise it will either result in empty machining or collision.

6. Improve programming skills

Programming is a crucial step in CNC machining, and improving programming skills can greatly avoid unnecessary collisions.

For example, when milling the inner cavity of a workpiece, the milling cutter needs to quickly retract to a position 100mm above the workpiece. If N50 G00 X0 Y0 Z100 is programmed, the CNC machining center will link the three axes, and the milling cutter may collide with the workpiece, causing damage to the tool and workpiece and seriously affecting the accuracy of the CNC machining center. In this case, the following program N40 G00 Z100 can be used:; N50 X0 Y0； The tool should first retreat to a position 100mm above the workpiece, and then return to the programming zero point, so as not to collide.