CNC milling machine, also known as CNC milling machine, is an automatic processing equipment developed on the basis of general milling machines. The processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine. Among them, a CNC milling machine with a tool magazine is also called a machining center.
So what is the reason for the collision of the CNC milling machine? Let's take a look together below!
Since the CNC milling machine is locked by software, during simulation processing, when the automatic operation button is pressed, it is not intuitive to see whether the machine tool is locked or not in the simulation interface. There is often no tool setting during simulation. If the machine tool is not locked and running, tool collision is very likely to occur. Therefore, you should go to the running interface to confirm whether the machine tool is locked before simulating processing. Forgetting to turn off the dry run switch during processing. Because in the program simulation, in order to save time, the dry run switch is often turned on. Dry run means that all motion axes of the machine tool run at the speed of G00. If the dry run switch is not turned off during processing, the machine tool ignores the given feed rate and runs at the speed of G00, causing accidents of hitting the tool and hitting the machine tool. There is no reference point return after the dry run simulation. When the program is verified, the machine tool is locked and the tool is in the simulation operation relative to the workpiece processing (absolute coordinates and relative coordinates are changing). At this time, the coordinates do not match the actual position. The method of returning to the reference point must be used to ensure the machine The zero point coordinate is consistent with the absolute and relative coordinates. If no problems are found after the program is checked, the machining operation will be carried out, which will cause tool collisions. The direction of overtravel release is wrong.
When the machine tool is overtravel, you should press the overtravel release button and move it in the opposite direction manually or manually to eliminate it. However, if the direction of release is reversed, it will cause damage to the machine tool. Because when the overtravel release is pressed, the overtravel protection of the machine tool will not work, and the travel switch of the overtravel protection is already at the end of the travel. At this time, it may cause the workbench to continue to move in the overtravel direction, eventually pulling the lead screw and causing damage to the machine tool. The cursor position is incorrect during operation. When running, it usually starts from the cursor position and executes downwards. For the lathe, it is necessary to call the tool offset value of the used tool. If the tool is not called, the tool of the running program segment may not be the desired tool, and it is very likely that the tool collision accident may occur due to different tools. Of course, the coordinate system such as G54 and the length compensation value of the tool must be called first on the machining center and CNC milling machine. Because the length compensation value of each tool is different, it may cause tool collision if it is not called.
As a high-precision machine tool, CNC milling machine is very necessary to avoid collision. Operators are required to develop the habit of being careful, careful, and operating the machine in the correct way to reduce the occurrence of machine tool collision. With the development of technology, advanced technologies such as tool damage detection during processing, machine tool anti-collision detection, and machine tool adaptive processing have emerged, which can better protect CNC machine tools.