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Author: MULAN -Plastic Molding Manufacturer
How to improve the machining accuracy of CNC lathes? The countermeasures to improve the machining accuracy of CNC machine tools are as follows The machining accuracy becomes the key to solving the problem. Through extensive research and analysis, as a countermeasure to improve the machining accuracy of numerically controlled machine tools, there are the following methods. 2.1 Improve machining accuracy by controlling the original error of CNC machine tools In the process of CNC machine tool processing, the error itself is inevitable, and there is an inevitable error between the workpiece and the CNC machine tool. This constant existing error is called the original error.
Therefore, in order to improve the machining accuracy of CNC machine tools, controlling the original error of CNC machine tools is one of the important countermeasures. Make a systematic analysis of the possibility of the original error, and formulate corresponding improvement measures according to the cause and type of the error. The positional accuracy and geometrical accuracy of the NC working machine have an important influence on the machining accuracy of the mechanical parts during the machining process. Through positional control and geometrical accuracy control, the influence of positional errors and geometrical errors on the parts must be reduced. At the same time, for the deformation error generated during the processing, air cooling, water cooling and other methods are used to control the thermal deformation during the processing, so as to reduce the influence of the processing accuracy caused by the thermal deformation error.
At the same time, for the position error, reasonably select the tool suitable for the material of the part to avoid tool deformation. At the same time, select a reasonable fixture according to the shape of the blank material of the processed part. If necessary, the fixture must be designed specifically for the shape and size of the part, so that no position error occurs. . 2.2 Reasonably design the core components of the machine tool to avoid positioning errors. The positioning accuracy of the machine tool has an important impact on the accuracy of the parts. The core components that affect the positioning accuracy of the machine tool, such as the straightness and levelness of the feed system, guide rails, and worktables, etc. When designing a CNC machine tool, the core components should be reasonably selected. For example, when selecting the ball screw widely used in machine tools, the accuracy of the ball screw should be fully considered, and a relatively mature ball screw technology should be selected and installed.
The support of the ball screw can also not be ignored. The support of the ball screw is closely related to the transmission accuracy of the system. The support of the ball screw is mainly determined by the axial load and the rotational speed, which has an important impact on the machining accuracy of the CNC machine tool. Usually, high-precision fixed and support methods. At the same time, during the design process, strict related inspections should be carried out on the bearing capacity of the ball screw. The drag chain, as a part of the external protection of the machine tool, is now indispensable to the machine tool.
Due to its chain link structure, it will also generate certain vibration when following the movement of the tool holder. This vibration will be directly transmitted to the tool, which will eventually affect the machining accuracy to a certain extent.