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Machinability Analysis of CNC Precision Parts Machining


Machinability Analysis of CNC Precision Parts Machining

CNC precision parts processing is a general term for computer-aided design/manufacturing systems (CAD/CAE) or numerical control devices and special software systems for automated production lines. It is a control system and equipment that adopts the principle of digital control to realize the cutting function of machine tools, automatically change tools and has various monitoring functions; its notable feature is that it can easily compile processing programs, effectively reduce the workload of programming, improve work efficiency and use. The labor intensity of the operator; by changing the form of input data, it can adapt to various requirements, and it is easy to use hardware to realize the measurement of the coordinates of the tool setting point. At present, many people in the world are developing this technology and its related products and technical applications. my country began to develop this type of equipment in the early 1970s, and has formed a considerable scale of production capacity and supporting systems in the past 20 years.

Machinability Analysis
CNC precision parts processing should choose a reasonable shape and size of the blank: for rough milling, a bar with a larger diameter is generally used as the base material for processing; for fine carving, a small fillet transition piece should be used as much as possible to reduce the surface Roughness value.
For CNC precision parts processing, it is necessary to determine the appropriate clamping method and the positioning reference line position of the workpiece: for example, for a horizontal boring machine, any point on the workpiece can be selected as the center of the mounting surface; for a vertical lathe, the center plane of the two holes is used as the center of the mounting surface; The gantry planer usually uses the cross groove on the headstock as the positioning reference line.
CNC precision parts processing reasonably sets the feed speed range of the tool according to the material properties of the processed parts: for example, the speed of hard aluminum alloy profiles can be adjusted between 50-80m/min to meet the processing requirements of different surfaces.
CNC precision parts processing correctly calculates the process time: due to the long time interval of each process, it is necessary to consider the simultaneous operation of multiple machines.
Make a program sheet
In order to ensure that the entire work process can be completed smoothly and the quality is guaranteed, it is necessary to formulate a corresponding work schedule for each specific process, that is, a program sheet. The format of the program list is generally task name-content description, where the task is the processing step defined by the user, and the content includes specific processing parameters and time arrangement. In addition, it is necessary to indicate the verification method of the program (check whether key detection items are missed), the handling measures when abnormal conditions occur during the processing, and so on.

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