Common troubleshooting methods for machine tools in precision parts processing plants
Precision parts processing machine tools are typical mechatronics production equipment. The machine tool numerical control system is diverse, complex, and highly intelligent, which makes the fault diagnosis and troubleshooting of numerical control machine tools require professional technology and knowledge. In general, the common faults of machine tools and The corresponding exclusion methods are as follows:
(1) Failure of the feed drive chain:
Because the guide rails generally use rolling friction pairs, most of the feed transmission failures are caused by the decline in the quality of motion, such as the mechanical parts do not reach the specified position, the operation is interrupted, the positioning accuracy is reduced, the backlash is too large, etc., such failures can be adjusted The pre-tightening force of each sports pair, adjust the loose link, improve the motion accuracy and adjust the compensation link.
(2) Machine zero return failure:
When the precision parts processing machine tool returns to the reference point, an overtravel alarm occurs without deceleration action. This type of failure is generally that the deceleration signal is not input to the CNC system. Generally, the limit stop and signal line can be checked.
(3) Failure of automatic tool changer:
This type of fault is more common. The fault is manifested as a tool magazine movement fault, excessive positioning error, improper tool change action, tool change action jam, and the whole machine stops working. The troubleshooting of such faults can generally be done by checking the cylinder pressure. Adjust the position of each limit switch, check the feedback signal line, and adjust the machine parameters related to the tool change action to eliminate it.
(4) The machine cannot move or the machining accuracy is poor:
These are some comprehensive faults. When such faults occur in the processing of precision parts, they can be eliminated by re-adjusting and changing the clearance compensation, and checking whether there is crawling during the axis feed.