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How to quickly improve their operation level for CNC machine tool novices

Posted by: Chris Na 2021-05-26 Comments Off on How to quickly improve their operation level for CNC machine tool novices

As far as the classification of many domestic operators who have just engaged in cnc machine tools is concerned, a large part of the operators are skilled workers who have previously engaged in general manual machine tool or semi-automatic machine tool operations. They are very familiar with machining, but they are very familiar with the programming of CNC machine tools. Relatively unfamiliar; there are also students who have just graduated from a mechanical engineering school. They are familiar with machining knowledge, CNC machining and programming theories, but lack actual machining experience; there are also many operators who have never been exposed to machining and programming. Yes, they have to learn the operation of CNC machine tools, the difficulty is very huge. For those who are new to CNC machine tools, it is very important to master certain CNC machine operation skills. On the one hand, they can avoid machine tool collision accidents and cause damage to the machine tool; on the other hand, they can quickly improve the operator’s CNC machine operation skills in a short period of time, be competent for their job, and create economic benefits for the unit. This article is especially aimed at these operators who are new to CNC machine tools, and introduces some theoretical knowledge of the operation skills of CNC machine tools, hoping to have some reference significance for the operators of CNC machine tools who have just been engaged in.
First of all, the operator needs to have a comprehensive understanding of the CNC machine tool being operated. To understand the mechanical structure of the machine tool: to understand the mechanical structure of the machine tool; to grasp the axis distribution of the machine tool; to grasp the positive and negative directions of each CNC axis of the machine tool; to grasp the function and use of each part of the machine tool, such as simple The principle and function of the pneumatic system, the working principle and function of the simple hydraulic system; in addition, the working principle and function of each auxiliary unit of the machine tool must be mastered, such as the work of the tool magazine, cooling unit, voltage regulator, electrical cabinet cooler, etc. Principle, function and usage method, as well as the working principle, function and usage method of each safety door lock of the machine tool.
Firmly grasp the function of each operation button of the machine tool: know how to execute the program; how to pause the program and check the processing state of the workpiece, and then resume the suspended state to continue executing the program, how to stop the program; how to execute the program after changing the program, and so on.
Understand what kind of operating system the machine tool you are operating; briefly understand the control principle and working method of the numerical control system; what kind of working language the system uses, the software used for machine tool processing and the language used. If the operator does not understand the language or the professional vocabulary of the language, then professional training is needed. During the training, you need to take careful notes. What each vocabulary in the machine tool software represents must be memorized by rote. After mastering it, only then can the machine be used correctly in the work in the future. In addition, the operator also needs to learn and master the general operating alarm statements during training, know what the Chinese means, how to solve the problem, and how to eliminate false alarms. In addition, for operators, if they have the energy and ability to allow, they can learn and master this type of language, which will be of great help in improving machine tool operation skills in the future.
Secondly, it is necessary to be proficient in the manual or automatic operation of the control CNC machine tool, and to master the movement of each CNC axis of the control machine tool. The operator must reach the realm of practice makes perfect, so that he can retract and release freely under any circumstances; only in the event of a collision or failure, the operator can correctly and timely deal with the problem, and the operator will form a conditioned reflex. , Decisively take braking measures. In addition, the operator must be very familiar with the processing procedures of the CNC machine tool; what kind of processes and operations the machine tool should have and what actions should be very familiar. When the machine tool executes the program, you can know at the first time whether the machine tool action is correct and whether you need to take braking measures. In addition, every beginner operator has more or less fear in the early stages of operating the machine tool, fearing that the machine tool will hit the machine or the machine will hit. Then only after the operator has mastered the operation of CNC machine tools, can he overcome similar fears and learn and master higher CNC machine operation skills on this basis.
Third, you must be proficient in program editing, parameter compensation of each process and compensation of the diameter and length of the tool or grinding wheel. First of all, you must be trained to master the programming language, programming method and parameter compensation method of the CNC machine tool you want to operate. Now most advanced CNC machine tools are equipped with PC workstations for programming or simulation. Then beginners can first perform software editing and machine tool cutting simulation learning on the workstation. In the process of learning programming, do not only pay attention to the simulation results, but more importantly, learn to simulate the machining process. You must understand what kind of tool or grinding wheel is required to process the workpiece, and what kind of motion trajectory of the CNC axis of the machine tool completes the cutting process; When performing a specific process, the position and direction of the movement of the relevant parts in the machine tool; pay attention to the movement direction and cutting direction of each axis when performing the processing, including how to feed and retract the tool, pay attention to each work in the machine tool processing The fast forward speed and displacement of each step, the speed and displacement of each work step. When processing through simulation software, pay attention that all parameters must be entered correctly during the simulation process. Do not enter sloppyly because of the simulation. This may result in incorrect simulation processing results; or cause collision accidents during actual processing in the future, or The parts are scrapped. If the simulation software has the function of anti-collision test, then it is necessary to use this function to check the correctness of the programming. In addition, the operator needs to pay special attention: the simulation processing is only a theoretical result, and it does not mean that the machine tool will not collide in the actual cutting process, nor does it mean that qualified products can be processed. The purpose of simulation is to save programming time, improve the actual utilization rate of the machine tool, and reduce the debugging time when processing the workpiece. It does not represent the actual part processing. The completion of perfect workpiece processing is inseparable from the wisdom and sweat of CNC machine operators.
Fourth, the processing skills in the actual processing process, carefully prepare for the work, first read the drawings, confirm the position of the workpiece to be processed, confirm the accuracy tolerance of the workpiece to be processed, and then edit the processing program. It is necessary to prepare the workpieces and tools or grinding wheels needed in the processing, prepare all the inspection instruments needed in the processing process, and prepare all the auxiliary tools and fixtures required in the processing process.