Introduction to numerical control lathe spindle control technology process

2020 - introduction to numerical control lathe spindle control technology process 03 - 09 Cheng Shouguo ( Mechanical and electrical engineering department of jiangsu province jiangyin jiangyin polytechnic college, 214405) Abstract: by using FANUC 0 I MATE TC CNC system and mitsubishi S500 inverter CNC lathe as an example, this paper expounds the main control and maintenance inspection points, combining numerical control principle and programming operation, combining the control principle of diagnosis and maintenance, through the evaluation methods of verification method, can improve the teaching effect of machine maintenance and other related courses. Key words: machine tool maintenance; Main shaft; Inverter has long main develop direction of numerical control specialty is habitually regarded as nc machine tool operation and programming and machining. The direction of the nc machine tool maintenance importance is relatively weak. This is one of the reasons for the machine maintenance to broad knowledge requirements. To the operation of the machine tools, programming, electrical and mechanical has certain requirements. Coupled with the need for practice time and proficiency, vocational school students are relatively or difficult to learn. How to build a sufficient knowledge of CNC maintenance system, improve the students' interest in learning and operability is this kind of curriculum teaching reform one of the main problem. For the numerical control technology professional, Processing direction) Inverter breakdown maintenance of higher vocational students in terms of CNC machine tools is clearly can't do [ 1] , should locate on module level maintenance levels rather than components or chips. Another case is the performance of machine tool maintenance often specify other normal fault [to deal with 2] So that the processing has certain blindness. The following numerical control lathe spindle control and maintenance as an example in detail to the numerical control principle and operation method of combining the programming. 1 CNC lathe spindle control process to inform such operation: input program M03 S200, works in the way of MDI, cycle start press, observe whether the spindle rotation. In the process of CNC will speed instruction S200 processed backwardness to 5 and 2 of frequency converter, here can use a multimeter to measure a 0 ~ 10 v voltage signal; CNC M03 processing backwardness to PLC and PLC ladder diagram to M03 do decoding and processing, in the final processing result is output signal control relay coil, controlled by the relay coil to connect in the direction of the inverter control contact KA5 or KA6, frequency converter after receiving direction and velocity signals to be able to perform. Numerical control lathe spindle control as shown in figure 1. 2 machine tool electrical control drawings using inverter working conditions are very much, want to let the students understood organized system. Through the find all of the electric control schematic diagram and the spindle control related components, control circuit and so on can let the students have a clear understanding the complete. The drawings of the electrical components symbols and that of the physical machine tools, machine tool electrical cabinet, can further grasp the spindle control principle. When malfunction happened, it can find the drawings, thinking the control principle, according to the fault phenomenon to find fault point location, then use measurement tools such as multimeter further judgment can solve most of the common faults. 3 in the numerical control lathe spindle control operational links involved in the numerical control lathe spindle control machine tool operation panel, PLC, frequency converter, contactor and relay and other electrical components. Machine tool operation panel, inverter, contactor and relay with PLC. The alarming signal from the machine tool operation panel, and inverter is PLC input signal, the indicator lights on the machine tool operation panel, the relay coil is the signal from the PLC control. The power of the inverter is controlled by the PLC relay contact control contactor KM3 contact on-off control. Equipped with operation panel inverter itself also has a switch operation and function of parameter setting, debugging and fault diagnosis is more convenient. 4 CNC lathe spindle control and maintenance of here can be set according to the practical condition of examination questions, such as: manual control frequency converter to realize the spindle speed rotating at 195 r/min; Automatic control, CNC programming) Machine tool to realize the spindle rotates at 506 r/min speed. The topic request to the operation of the converter is more skilled, and CNC programming and operation of basic knowledge will be. Also note that the automatic control to the inverter switching mode of operation. About PLC parameters and the parameters of the numerical control machine, inverter and other content of the assessment is best established in other link under normal conditions. Nc machine tool maintenance learning, practice is very important. Reasonable increase the proportion of practice link, and constantly thinking appraisal way and content to improve students' interest in learning, thinking and analysis of machine tool failure thinking habit, is very important to the cultivation of professional talents of numerical control technology. In the conditional case, students set fault for other students to practice after the learning effect can make a big promotion. References [ 1] Fan Fanghong. CNC machine inverter breakdown maintenance [ J] 。 Manufacturing technology and machine tool, 2016 ( 05) : 129 - 132. ( 2] A long, zhou LAN. FANUC 0 i - MD CNC milling machine spindle the analysis of the causes of common faults and elimination method [ J] 。 Machine with hydraulic, 2015 lancet ( 04) : 184 - 186. Source: the digital technology and the application of 5, 2019