Constant speed machining system of modern control

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Constant speed machining system of machine tool modern control technology

machine tool combines the rapidity of modern control technology with the precision of machine tool movement to form a real constant speed machining system. The control system of machine tool may become an obstacle to shorten the machining cycle and improve the finish of complex 3D models, aerospace parts or medical device components. When the processor cannot keep up with the running speed of the program, the driver will reduce the feed speed of the tool due to the urgent need for information, according to Qiao Jinliang, vice president of Beijing Research Institute of chemical industry and professor level senior engineer, so as to prolong the processing cycle and lead to the uncoordinated operation of the tool. In order to replace worn and overloaded tools, in addition to increasing the number of tool runs to the tool library, it will also affect the effective utilization of the spindle and increase the workload and finishing time of fitters

most of the control systems currently used can be traced back to the root of the development of this system, that is to say, it has a history of 30 to 40 years. One of the bottleneck problems at that time was the download speed of RS-232 connection. The program segment reading speed of this type of control system can reach 5000/s program segments. This speed is enough for the processing program of many parts, but for complex parts, the required speed is much higher than this speed. When Mr. carlomiceli of MTI company began to develop his own control system, he also applied a new method to PC language logic and effective information processing with the spot market. Its product is a CNC system based on modern PC hardware, equipped with a new tool path algorithm, and its reading speed reaches more than 5000/s program segments. Gbicicinnati said that its results have met the requirements of "constant speed" processing. Its production makes it difficult to identify the yield point. The speed is fast and the feed rate is very stable

when the speed (feed rate) is unstable, some problems will occur. When the tool runs through part processing, its uneven movement will cause different loads on the cutting slots on the tool, which will affect the machining accuracy and surface finish. If the running speed of the tool is not fast enough to maintain the minimum cutting load of the tool, friction will occur between the tool and the workpiece instead of cutting, and the unstable movement of the tool will shorten the service life of the tool. Such operation mode will also cause a small amount of fracture notch of the blade, making the tool hot and blunt. However, with constant speed machining, the average machining speed of the tool passing through the workpiece will be more uniform and the machining accuracy will be higher, which can not only shorten the processing time, but also prolong the service life of the tool

in the "revolutionary" series of machining centers, MTI's control system will not generate excessive stress related to the high-speed machining. Recently, Europe has also modified the standard of its headlights, allowing fluid cutting tools to run machining on the geometry of complex parts

in the process of program execution, the result of using high-speed program segment processing is that the random error of the control system can be stably monitored and adjusted, so that the tool can run at a uniform speed and achieve a perfect surface integrity. The system uses more than 80 high-speed buffers to monitor the operation of the tool. If the random error is exceeded, the movement of the tool can be adjusted immediately

even when machining very complex shapes, it is said that the rapidity of the control system, the fine adjustment of the driving device and the processing of the tool path can achieve the purpose of fast and accurate program execution

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