How to avoid collision knife in CNC processing?

In the process of CNC machining, human factors and operating experience, to a large extent, will affect the processing efficiency and the processing quality of the workpiece. For this reason, the causes of the collision in CNC machining are analyzed from two aspects of programming and operation, and the countermeasures are put forward.

First, programming reasons

1, the safety height is not enough or not set (fast feed G00 knife or chuck hit the workpiece).

2. The tool on the program sheet and the actual program tool are wrong.

3, the program sheet on the length of the tool (blade length) and the actual depth of processing is written wrong.

4, the program sheet depth Z-axis number and the actual Z-axis number is wrong.

5. Incorrect coordinate setting during programming.

Solution:

1. Accurate measurement of the height of the workpiece also ensures that the safe height is above the workpiece.

2, the program on the tool and the actual program tool to be consistent (as far as possible with automatic program or picture out of the program).

3. The actual depth of processing on the workpiece is measured, and the length and blade length of the cutter are clearly written on the program sheet (generally the length of the cutter clamp is 2-3mm higher than the workpiece, and the length of the blade is 0.5-1.0mm).

4, the actual Z axis number on the workpiece, write clearly on the program sheet. (This operation is generally manual operation written to be double-checked).

Two, the operation reason

1, depth Z-axis tool alignment error.

2, in the collision number and operation error (such as: unilateral number without feed radius, etc.).

3, with the wrong knife (such as: D4 knife with D10 knife to process).

4, the program is wrong (such as: A7.NC goes A9.NC).

5. The handwheel shakes in the wrong direction during manual operation.

6, manual fast feed when the wrong direction (such as: -X press +X).

Solution:

1, the depth of Z-axis knife must pay attention to the position of the knife. (bottom, top, analysis, etc)

2. Check the number of touches and operations repeatedly after the completion of the points.

3, the clamping tool should be repeatedly and program list and program control check in the installation.

Procedures to go one by one in order.

5, in the use of manual operation, the operator should strengthen their own machine tool operation proficiency.

6. When moving quickly manually, the Z axis can be raised to the workpiece and moved.

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