Analysis on the causes of collision in the operati

2022-08-07
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Analysis on the causes of machine collision during the operation of CNC machine tools

as a high-precision machine tool, anti-collision is very necessary. The operator is required to develop the habit of being careful and cautious, operate the machine tool according to the correct method, and reduce the occurrence of machine tool collision

there are about 9 reasons for the collision

1. Programming error

process arrangement error, process undertaking relationship is not considered in detail, and parameter setting error

for example:

a. the coordinate is set as zero at the bottom, but in practice, it is set as 0 at the top

b. the safety height is too low, which makes the tool unable to lift out the workpiece completely

c. the second cutting rough allowance is less than that of the previous knife

d. after the program is written, the path of the program shall be analyzed and checked

2. Program sheet remark error

example: A. single side collision number is written as four side middle

b. pay attention to the clamping distance of the vise. The contact parts should be cleaned or the protruding distance of the curtain wall engineering parts is marked incorrectly

c. tool collision is caused by unclear or incorrect remarks on the tool extension length

d. the procedure list shall be as detailed as possible

e. when the program sheet is changed, the principle of replacing the old with the new shall be adopted: the old program sheet shall be destroyed

3. Tool measurement error

example:

a. tool setting data input does not consider the tool setting lever

b. the tool loading is too short

c. scientific methods should be used for tool measurement, and more accurate instruments should be used as far as possible for these instruments we just want to talk about

d. the loading length shall be mm longer than the actual depth

4. Program transmission error

program number calling error or the program is modified, but the old program is still used for processing; The on-site processor must check the details of the procedure before processing, especially the component data with general requirements for heat resistance; For example, the time and date when the program is written, and simulated with the bear family

5. Tool selection error

6. The blank exceeds the expectation, and the blank is too large, which is inconsistent with the blank set in the program

7. The workpiece material itself has defects or the hardness is too high

8. Clamping factors, cushion block interference and the program does not consider

9. Machine tool failure, sudden power failure, lightning strike, etc.

with the development of technology, tool damage detection, machine tool anti-collision detection Advanced technologies such as adaptive machining of machine tools can better protect CNC machine tools

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