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Three Factors Affecting CNC Machining Technology

December 10, 2022

Among the numerous factors of NC machining technology, the upgrade of mechanical NC software and hardware system has a greater impact on CNC machining technology and CNC machining accuracy. Therefore, in order to improve the overall level of cnc processing technology, the primary concern is to upgrade the cnc processing hardware system. In practical operation, we should start from the following two aspects: on the one hand, we should pay attention to the research of some CNC programs. According to the demand of industrial cnc processing in our country, a cnc processing computer program is designed.
Three factors affecting CNC processing technology - CNC lathe processing manufacturer's small compilation to tell us:

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1: Position Error in NC Machining
The position error affecting the machining accuracy refers to the variation or deviation degree of the mutual positions between the actual surfaces, axes or symmetry planes of the machined parts relative to their ideal positions, such as perpendicularity, positional accuracy, symmetry, etc. The position error in NC machine tool processing usually refers to the dead zone error. The reason for the position error is mainly due to the machining error caused by the clearance and elastic deformation during the transmission of machine tool parts during processing, and the position error caused by the friction and other factors that need to be overcome by the cutter head of the machine tool during processing. In the open loop system, the position accuracy is greatly affected, while in the closed loop servo system, it mainly depends on the accuracy of the displacement detection device and the speed amplification coefficient of the system, which generally has little impact.

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2: Due to geometric errors in NC machine tool processing
The resulting machining accuracy error During the processing of CNC machine tools, the geometric accuracy of the machine tools is affected by external factors such as external forces and heat generated during processing, and the geometric deformation of the parts machined on the machine tools is caused, which leads to geometric errors. According to research, the main reasons for geometric errors of CNC machine tools are the following two: internal factors and external factors. The internal factors causing geometric errors of the machine tool refer to the geometric errors caused by the factors of the machine tool itself, such as the levelness of the worktable of the machine tool, the levelness and straightness of the guide rail of the machine tool, and the geometric accuracy of the tool and fixture of the machine tool. External factors mainly refer to geometric errors caused by factors such as external environment and thermal deformation during machining. For example, geometric errors caused by thermal expansion and deformation of tools or parts during cutting affect the machining accuracy of machine tools and parts.

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3: Machining accuracy error caused by machine positioning in NC machine tool processing
Through long-term data analysis and practical operation of parts processing, it can be seen that the positioning of machine tools has a great impact on the processing accuracy of CNC machine tools. In terms of structure, the machining errors of CNC machine tools are mostly caused by positioning accuracy, and the feed system of the machine tool is the main link affecting the positioning accuracy. The feed system of CNC machine tools is usually composed of mechanical transmission system and electrical control system. The positioning accuracy is related to the mechanical transmission system in structural design.