Numerical control lathe spindle system fault diagnosis

common categories of nc machine tools to end more modern factory, medium and small batch of parts processing. Common nc machine tools are neway CNC lathe, milling machine and machining center, etc. To habits in nc machine tools of high automation, high plasticity, and the processing characteristics of high accuracy and rate of CNC lathe spindle system USES its unique methods and structure. The mechanical structure of the CNC lathe spindle: 1. Spindle ladder for a hollow shaft. 2. End of choosing short conic flange structure in collaboration with the chuck body; 3. After the spindle end first for equipment rotary oil cylinder; 4. Hollow spindle used by rotary oil cylinder piston rod; 5. Transmission methods are gear transmission, synchronous belt and belt mixed with gear transmission. Numerical control lathe electrical structure: 1. Drive for bridging nc equipment and spindle motor; 2. Completion of photoelectric pulse encoder, spindle speed real-time inspection, which constitute the main electrical control system; 3. Completion of rotary cylinder hydraulic control circuit, chuck jaw clamping and loosening. Nc lathe spindle system fault features: the main shaft system problems also can be divided into mechanical faults and electrical fault. Some mechanical structure as mentioned above, it is well known that a brief in the part of the problem is who often do the rotary motion, linear motion components, so find something wrong with parts should first preliminary from these parts. Vertical CNC processing base, for example, appeared to hold the cutting tool, should first check if broach rod stroke changes, due to broach rod during tool change again and again, often do linear motion. Some including spindle spindle system of electrical motor, drive, CNC equipment, spindle speed inspection equipment, parking equipment. Brief faulty is spindle motor, the spindle speed inspection equipment, must stop. Fault diagnosis method: generally speaking, a mechanical problems compared to short notice, and electrical fault diagnosis difficulty will be larger. Nc rotary working table commonly so judging mechanical some first whether there is something wrong with, then discriminant electric is some existing problems. First find out the machine tool spindle assembly from the mechanical structure, inspection of these components is normal or not. From experience, CNC machine tool spindle with large some of them are mechanical action failure cause. So, follow after the first mechanical electrical diagnosis method, generally can reach the role of get twice the result with half the effort.

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