In the field of CNC machining, reasonable division of the machining process is crucial for improving production efficiency and ensuring machining quality. So, how should we divide this complex machining process?
From the structural characteristics of the parts, this is an important basis for dividing the machining process. For parts with complex shapes and multiple different geometric features, they can be decomposed into several relatively simple parts first. For example, a shaft component with a flange can have the shaft and flange parts treated as different processing stages. The shaft part may focus on rough machining, semi precision machining, and precision machining of the outer circle, while the flange needs to undergo end face machining, hole machining, etc. This phased processing can make the processing more targeted, select appropriate cutting tools and processing parameters, and avoid processing difficulties or unstable quality caused by structural differences.
The requirement for machining accuracy is also a key factor
Generally speaking, the entire machining process can be divided into three stages: rough machining, semi precision machining, and precision machining. The main purpose of the rough machining stage is to remove most of the blank allowance, so that the part approaches the final shape and size. At this time, the precision requirements are relatively low, and the focus is on improving machining efficiency. For example, when rough machining a box part, a large amount of material can be quickly cut off. In the semi precision machining stage, the surface after rough machining will be further processed to make the machining size closer to the final requirements, while leaving appropriate margin for precision machining to ensure stable high precision during precision machining. The precision machining stage is to meet the high-precision requirements of the parts, such as the precision machining of the mold cavity, which requires the use of appropriate cutting parameters and high-precision cutting tools to ensure that the surface quality and dimensional accuracy meet the design standards.
We also need to consider the characteristics of the processing technology
Different processing techniques have their own advantages and applicable scope. For example, for some parts that require heat treatment, a heat treatment process can be arranged after rough machining, as heat treatment can cause deformation of the parts. The surplus after rough machining can ensure that subsequent machining can still correct the dimensional changes caused by deformation. For parts with surface treatment requirements, such as chrome plating, painting, etc., surface treatment is usually placed last to avoid damaging the treated surface during the processing.
In actual CNC machining, it is necessary to comprehensively consider multiple factors such as part structure, precision requirements, and process characteristics to divide the machining process. Only in this way can the advantages of CNC machine tools be fully utilized to produce high-quality mechanical parts, meet the needs of various industrial production, enhance the competitiveness of enterprises in the market, and enable CNC machining to better serve the development of modern manufacturing industry.
