CNC machine tool repair technology as a new industry, its direct purpose and the end result is to restore the normal operation of CNC machine tools, thus ensuring the smooth use of equipment. CNC machine tools are an efficient automated machine tool, which integrates computer technology, automation technology New technological achievements in various fields such as servo drive, precision measurement and precision machinery are an emerging mechanical control technology. Due to its good economic performance and high production efficiency, it is in an increasingly important position in production. However, due to the advanced nature of CNC machine tools and the instability of faults, most of the faults occur in the form of comprehensive faults. Therefore, the maintenance of CNC machine tools is difficult, and the maintenance work of CNC machine tools is not standardized, which makes CNC maintenance work in a kind of Chaos state, in order to improve the use of CNC machine tools, combined with the maintenance principle of CNC machine tools, this article will talk about the general method of maintenance of CNC machine tools.
When a CNC machine tool fails, it is first necessary to understand the fault phenomenon, how it occurs and the process that occurs. If the fault can be reproduced, the process of the fault should be observed. Only when the first-hand situation is known can the fault be eliminated.
At the same time, observe whether there is mechanical damage; whether there are burning marks, whether the resistance and the wire have changed color; whether there are abnormalities in the running and sealing parts, such as spatter, falling off, spillage, oil, smoke, Mars, etc.; Whether the relay is tripped, whether the fuse is blown; whether the machine power supply is out of phase, whether the three-phase is seriously uneven, whether the machine tool voltage is normal, whether the parts on the electrical components are disconnected, broken, stuck, loose joints, etc.; Is it appropriate; the operator's processing program is correct. This step is the most intuitive for the maintenance inspection of CNC machine tools, and it is also a step to test the familiarity of the maintenance personnel on the hardware structure of the machine tool.
Identify whether there is any odor. When the moving parts of the machine tool are severely rubbed, the electrical insulation layer will burn out, and at the same time, the oil, smoke, gas, and the burnt smell of the insulating material will be generated; when the machine tool is discharged, ozone smell will be generated, and the discharge sound will be heard.
That is, the situation when the machine tool fails. It is best to establish strict management measures during CNC machining, which stipulates that operators can make detailed records when they encounter a fault. This can avoid the specific situation of the fault that the maintenance personnel are not around when the fault occurs. When a CNC machine tool fails, the machine tool must first be stopped to protect the site. The operator should record the fault as detailed as possible. The important information should be observed and recorded in detail. For example, the phenomenon when the fault occurs, the fault location, And the state of the machine and the control system at the time of the failure. If the fault occurs in the automatic machining mode, the machining program number at the time of the fault, the block number at which the fault occurred, and the tool number used during machining should be recorded. If there is a fault such as excessive machining accuracy or excessive contour error, the workpiece number to be machined should be recorded and the unqualified workpiece should be retained for specific analysis. In the event of a fault, if the system has an alarm display, the system's alarm display and alarm code should be recorded. If it is a fault that occurs when machining a part, the probability of failure when processing the same type of workpiece should be recorded.
That is to diagnose the fault phenomenon and perform maintenance. This step is also the most important step for CNC machine tool maintenance.