Analysis of the reasons for CNC machining center tool collision and how to avoid it?

Compared with ordinary CNC machining centers, CNC machine tools have high machining accuracy, good dimensional stability, low labor intensity, and convenient modern management. Automation equipment is widely used in industry, agriculture, military, scientific research, transportation, commerce, medical care, services and households. The use of automatic technology can not only liberate people from heavy physical labor, some mental work, and harsh and dangerous working environments, but also greatly improve labor productivity and enhance human ability to understand and transform the world. Machining is a process in which mechanical equipment changes the shape or performance of a workpiece.

According to the difference in processing methods, machining can be divided into cutting processing and pressure processing. Mechanical parts processing generally refers to the sum of the mechanical processing process of parts and the assembly process of machines, and other processes are called auxiliary processes, such as transportation, storage, power supply, equipment maintenance, etc. However, due to improper operation or programming errors, the tool or tool holder is easy to hit the workpiece or the machine tool. The lighter one will smash the tool and the machined parts, and the heavier one will damage the machine tool components, thereby losing the machining accuracy of the machine tool, and even causing personal accidents. Therefore, from the perspective of maintaining accuracy, in the use of CNC machine tools, the tool is not allowed to collide with the machine tool or the workpiece.

Below we summarize and analyze the reasons for the knife collision.

Since the CNC machining center is locked by software, when the automatic operation button is pressed in the machining simulation, it is impossible to visually see whether the machine tool is locked in the simulation interface. When simulating, there is usually no tool alignment. If the machine tool is not locked, it is easy to hit the tool.

Therefore, before simulating processing, you should go to the operation interface to confirm whether the machine tool is locked. Forgot to turn off the idle switch during processing. Because in the process of program simulation, in order to save time, the idle switch is often turned on. Idling means that all the motion axes of the machine tool run at G00 speed. If the operation/operation switch is not turned off within the processing time and space, the machine tool will ignore the given feed speed and run at G00 speed, resulting in accidents of cutting and hitting the machine tool . There is no reference point after the idle run simulation. When calibrating the program, the machine is locked and the tool is run in the simulation relative to the workpiece (coordinates and relative coordinates are changing). At this time, the coordinates are inconsistent with the actual position, and the method of returning to the reference point must be used to ensure that the mechanical zero coordinates are consistent with the relative coordinates. If a machining operation is performed without the inspection program finding any problems, it will result in a tool collision.

Therefore, as a high-precision machine tool, CNC machine tools in CNC machining centers are very necessary to avoid collisions. Operators are required to develop careful and serious habits, operate machine tools according to correct operation methods, and reduce machine tool collisions.