数控维修（NC maintenance）.docVIP

数控维修（NC maintenance） CNC maintenance First, the multiple-choice question Volume A 1, in order to improve the utilization ratio of NC lathe and reduce the malfunction of NC lathe, CNC system should be used (B); B, full load 2, improve the quality of lubrication, can improve the CNC lathe mechanical failure (D); D, mean time to failure 3, the DC motor brush regular inspection, in the motor (A) circumstances; A, fully cooled 4, in the replacement of CNC lathe (C) must be in the system power supply; C, batteries 5, (B) will lead to turning thread when the accuracy of the thread is poor; B, axial movement 6, in the use of cooling lubricating fluid (C), you should dry the cooling lubricant on the guide rail, and add mechanical oil lubrication maintenance; C, before 7, when the machine tool (A) for the first level maintenance, should clean the oil filter, no debris; A, headstock 8, when the machine tool running (D) hours, should wash the external surface, keep inside and outside clean, no rust, paint color; D, 500 9, when the machine head box first level maintenance, should be adjusted (B) and brake; B and friction plate clearance 10, when machining the end face of a lathe, the Z direction of the tool post moves, and the axis of the spindle is not vertical, it will produce (C); Parallelism error of C and machined surface 11, when the hydraulic oil into the air, will cause the implementation of components at low speed (A); A produces crawling 12, tool switching, the reason for the knife is mainly due to (D) caused D: the manipulator is unable to transfer or change the tool position 13, the cause of the motor speed exceeding the set value is not included (D) D: servo motor fault 14, the main reasons for the increase of spindle noise include (B) B: is the spindle load too large? 15, when the feed servo system fails, the fault manifestation is wrong (B) B: displays the alarm number and content on the PLC 16, when the tool wear is found in the machining process, the boring size