Why CNC milling machine processing will appear? What should be the solution?

CNC milling machine processing in the process of workpiece processing will occasionally encounter the problem of hit knife, so what is the cause of the impact? How can we solve the problem of collision knife in processing?

1. Improper operation and programming errors

Due to improper operation of CNC milling machine processing operators or programming errors and other reasons, it is easy to make the tool or tool rest hit the workpiece or machine tool, the light will hit the tool and the parts being processed, the heavy will damage the machine tool parts, so that the machining accuracy of the machine tool is lost, and even cause personal accidents. Therefore, from the point of view of maintaining accuracy, in the use of CNC machine tools and never allow tool or workpiece collision.

Solution: because the CNC machining center is the use of software to lock, in the simulation of processing, when the press the automatic operation button in the simulation interface and can not intuitively see whether the machine has been locked. Simulation is often not on the knife, if the machine is not locked operation, easy to happen. So before the simulation processing should be to the operation interface to confirm whether the machine is locked. Forget to turn off the no-run switch during machining. In order to save time during program simulation, the empty run switch is often turned on. Empty operation means that all the moving axes of the machine are running at G00 speed.

2. The running switch is not off, and the feed speed is not properly controlled

If the running switch is not turned off in the processing time and space, the machine tool ignores the given feed speed, and runs at the speed of G00, resulting in knife hitting and machine accident.

3. There is no return to the reference point after empty run simulation

When checking the program, the machine tool is locked and not moving, and the tool is relative to the workpiece processing in the simulation operation, then the coordinate is not consistent with the actual position, if no problem is found after checking the program, the machining operation will cause the tool collision.

When the machine is over distance, it should press and hold down the over-distance release button, and move in the opposite direction by hand or hand, that is, it can be eliminated. But if the direction of relief is wrong, it will cause damage to the machine tool. Because when the overrun is released, the overrun protection of the machine tool will not work, and the travel switch of the overrun protection has been at the end of the travel. This may cause the table to continue to move in the direction of overdistance, and then pull the lead screw, resulting in machine damage.

4. The specified line is running improperly with the cursor

When the specified line is run, it is usually executed from the cursor position down. For the lathe, need to call the tool offset value, if there is no tool call, run the program section of the tool may not be the tool, it is likely to cause different tools collision accident.

Of course, in the machining center, CNC milling machine must first call the coordinate system such as G54 and the length of the knife compensation value. Because each knife length compensation value is different, if not called may also cause collision.

As a high-precision machine tool, anti-collision is very necessary. It requires the operator to develop the habit of being careful and careful, operate the machine tool in the correct way, and reduce the phenomenon of machine tool collision. With the development of technology, there are advanced technologies such as tool damage detection, machine tool anti-impact detection, machine tool adaptive processing and so on in the process of processing, which can better protect CNC machine tools.