Precision CNC lathe is a relatively complex system software. A CNC machine tool not only includes mechanical equipment, hydraulic transmission system, but also part of the electrical control system and software system. For various reasons, it is difficult to avoid common faults of different levels and types that make up the parts of the CNC machine tool, which will cause the CNC machine tool to fail to work normally. This reason probably includes: rust, damage and invalidation of mechanical equipment; embrittlement, destruction and invalidation of electronic devices; poor contact of electrical components and connectors; environmental damage, such as current or working voltage fluctuations, temperature changes, and hydraulic press working pressure And data flow changes and their oil stains; arbitrary influence and noise; software systems are lost or damaged, etc. In addition, incorrect use will also cause the CNC machine tool to not work normally. The key to the maintenance of CNC machine tools is the diagnosis of common faults, that is, the search for common fault sources and the precise location of common faults. -Generally speaking, choose different failure modes based on different common failure types.

Common causes of failures of automatic CNC lathes: CNC cutting tools are damaged without cutting iron like mud; CNC lathes cause vibration and cannot be placed for a long time; CNC lathes have crawling problems; the manufacturing process is not very good. Solution plan: If the CNC tool is damaged or injured, if you don’t cut the iron like mud, you must sharpen the tool or the modified CNC tool to set the tool again; the vibration or placement generated by the CNC lathe cannot be maintained for a long time. Place it again and adjust it stably; CNC machinery The reason for the crawling is that the linear guide rail of the CNC lathe tool post is damaged and the trapezoidal screw steel ball is damaged or dropped. The CNC lathe should be prepared for maintenance. After the rest time, the stainless steel wire should be cleaned and grease should be added immediately to reduce friction; use For the cooling fluid suitable for castings, if it can exceed the processing requirements of other technological processes, try to choose a higher spindle bearing speed ratio.

2. There is no problem with the phase difference light of the control board, and the size of the polished workpiece is large or small. Common causes of failure: long-term high-speed operation of the CNC lathe pallet causes the ball screw and rolling bearing to wear out; the coincidence accuracy level of the tool table is in Deviations occur during long-term use; the pallet can return to the starting point of the polishing process every time, but the specifications of the polished castings still change. This type of problem is generally caused by the spindle bearing. The rapid rotation of the spindle bearing causes serious damage to the rolling bearing, resulting in a change in the polishing treatment specification. Metal material processing mobile phone WeChat, the content is good, you need to care. Solution plan: Use the inner diameter dial indicator to lean against the bottom of the tool table, and at the same time write a fixed cycle according to the program flow, the repeatability level of the pallet, adjust the gap of the ball screw, disassemble the rolling bearing; use the inner diameter dial indicator For the repeat accuracy level of the tool post, adjust the CNC machine or disassemble the tool post; use the inner diameter dial indicator to check whether the casting is returned to the starting point of the system software after polishing. If possible, maintain the spindle bearing and disassemble the rolling bearing.

 3. Fully automatic CNC lathe casting parts lead to eccentricity of the smoothness of the head and size. Common fault causes: the level of the CNC lathe is not well controlled, unevenness, resulting in unstable placement; when drilling short shafts, the dedicated raw materials are relatively hard, and the CNC tools will eat. It is relatively deep, resulting in undesirable effects of the tool; the thimble of the CNC lathe tool station mold is different from the spindle bearing. Solution plan: Use the level to change the flatness of the CNC lathe, develop a solid roadbed, and strengthen the CNC lathe to improve its ductility; clear and reasonable processing and reasonable drilling and cutting parameters to prevent CNC tool load from yielding; change the CNC Lathe tool station.