On the stage of today’s manufacturing industry, CNC machine tools have become the backbone of production with their efficient and accurate processing capabilities. The machining accuracy requirements for key parts of typical CNC machine tools are undoubtedly the core elements that determine the choice of precision level CNC machine tools.
CNC machine tools are classified into different categories such as simple, fully functional, and ultra precision due to their diverse uses, and their accuracy levels vary greatly. Simple CNC machine tools still occupy a place in the current field of lathes and milling machines, with a minimum motion resolution of 0.01mm, and motion and machining accuracy generally ranging from 0.03 to 0.05 mm or above. Although the accuracy is relatively limited, in some machining scenarios where precision requirements are not extremely strict, simple CNC machine tools play an irreplaceable role due to their economic benefits and easy operation.
From the perspective of accuracy, CNC machine tools can be further divided into ordinary and precision types. Usually, there are 20 to 30 accuracy inspection items for CNC machine tools, but the most critical and representative ones are single axis positioning accuracy, single axis repeated positioning accuracy, and roundness of the test piece produced by two or more linked machining axes.
In some open-loop and semi closed-loop feed servo systems, the mechanical driving components after the measuring components are like ships moving forward in wind and rain, subject to various accidental factors. In summary, if there is a good choice in the selection process, there is no doubt that the equipment with the most excellent repeated positioning accuracy should be prioritized, adding a strong insurance to the processing quality.The precision of milling cylindrical surfaces or milling spatial spiral grooves (threads), like a fine ruler for measuring the performance of a machine tool, is a key indicator for comprehensively evaluating the servo following motion characteristics of the CNC axis (two or three axes) and the interpolation function of the CNC system of the machine tool.
In the practice of cutting test pieces on CNC machine tools, the milling oblique square four sided machining method also demonstrates its unique value, which can accurately judge the accuracy performance of two controllable axes in linear interpolation motion. When performing this trial cutting operation, it is necessary to carefully install the end mill used for precision machining onto the machine spindle, and then perform meticulous milling on the circular specimen placed on the workbench.
In summary, the accuracy of CNC machine tools is a multidimensional and comprehensive consideration index, which runs through the entire process of machine tool design and development, manufacturing and assembly, installation and debugging, as well as daily use and maintenance. Only by comprehensively understanding and mastering relevant knowledge and technology can we wisely choose the most suitable CNC machine tool in actual production activities, fully tap into its potential efficiency, and inject strong power and support into the vigorous development of the manufacturing industry.
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Company Name: Qingdao Taizheng Precision Machinery Co., Ltd.
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Phone: 13605328581
Address:C-101, Building 31, Zhongnan High tech Jimo Technology Innovation Industrial Park, No. 76 Dazhong 1st Road, Jimo District
City: Qingdao
Country: China
Website: https://www.ncmillingmachine.com/
