How to Enhance the Technology of Data Processing in CNC Machining Programming
Release date:
2022-07-22
How to Enhance Data Processing Techniques in CNC Machining Programming In CNC machining programming, it is essential to employ appropriate methods and techniques to improve the data-processing capabilities of CNC machine tools. To mitigate the influence of tolerance zone positioning, CNC programs are typically generated based on the part’s contour and nominal dimensions. This approach inevitably overlooks the effect of tolerance zone location, resulting in high‑precision machining but producing parts that fail to meet dimensional tolerance requirements.
How to Enhance the Technology of Data Processing in CNC Machining Programming
CNC machining skills
How to Enhance Technical Proficiency in Programming and Data Processing
In CNC programming, appropriate methods and techniques must be employed to enhance the data-processing capabilities of CNC machine tools. To eliminate the influence of tolerance zone positioning, CNC programs are typically generated based on the part’s contour and its nominal dimensions. This approach inevitably overlooks the effect of tolerance zone location, resulting in high‑precision machining but producing parts that fail to meet dimensional tolerance requirements.
(1) Analyze the part drawing to determine the manufacturing process; examine the part’s design, geometry, dimensions, and tolerances; clearly define the machining operations and requirements; and select the machining strategy, toolpath, cutting parameters, and appropriate tools and fixtures.
(2) For relevant numerical calculations, based on the part’s geometric dimensions and machining sequence, the coordinates of geometric features, datum points, endpoints, and circular arcs along the part’s contour are determined. During programming, it is necessary to compute the corresponding values according to the geometric dimensions, process route, and the defined coordinate system, thereby calculating the machining toolpath and obtaining the requisite data.
(3) Establish a control mechanism, apply the prepared program as a parameter to the CNC machine tool, input the relevant information, verify the program, and test the first cutting tool. The written program and the developed control mechanism must undergo verification and testing before they can be put into formal use.
How to Improve the Geometric Accuracy of CNC Machine Tools
Cutting tools are essential for CNC machine tools to perform part machining. When selecting a tool, factors such as wear resistance and high‑temperature stability must be considered, and the tool must also withstand specified levels of pressure, impact, and vibration. Therefore, tool selection should take into account both the part’s quality requirements and the production process. Conventional machine tools are typically made from high-speed steel, cemented carbide, or ceramic materials; each material exhibits distinct properties, so the appropriate tool should be chosen based on the specific application. In addition to proper tool selection, during CNC machining it is crucial to accurately control the tool geometry and its geometric angles. These include the nose radius, principal rake angle, insert tilt angle, front flank, back flank, and secondary back rake angle. Controlling these parameters from multiple perspectives is vital: the principal rake angle directly affects the strength of the cutting edge and the cross‑sectional shape of the cut; a larger nose radius results in lower surface roughness; and sharper front and back flanks yield finer surface finishes. Consequently, the machining accuracy of a CNC machine is closely linked to the tooling. When choosing tools, it is imperative to balance precision with wear resistance to effectively enhance the geometric accuracy of the cutting tool.
In addition, the geometric accuracy of CNC machine tools is also affected by cutting speed; excessively high speeds can induce vibration, thereby compromising geometric accuracy. To address this issue, it is essential to use precision‑machined steel sliding guideways during the design phase and, during installation, position these guideways below the mounting plane. Subsequently, fill the gaps between the guideways and the base with appropriate shims or packing material to enhance the machine tool’s geometric accuracy.
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