Analysis of what should be considered in the preparation of shaft parts processing technology

What should be considered in the preparation of shaft parts processing technology? This is a problem encountered when processing shaft parts, and it should be considered before the formal start of processing. Only when sufficient preparations are made in advance can the shaft parts be processed correctly by CNC or machining. Avoid errors in processing and improve processing efficiency. Since this part of knowledge is so important, let's introduce it in detail below. First of all, the process analysis of CNC machining should be carried out on the part drawing. The specific contents are: (1) Whether the dimension marking method in the part drawing is suitable for the characteristics of CNC machining; (2) Whether the geometric elements constituting the outline in the part drawing are sufficient; (3) ) Whether the reliability of the positioning datum is good; (4) Whether the required machining accuracy and dimensional tolerances of the parts can be obtained. For parts blanks, processability analysis should also be carried out, specifically: (1) analysis of the adaptability of the blanks in installation and positioning, and the size and uniformity of the margin; (5) whether the machining margin of the blanks is sufficient, and when mass production Whether the margin is stable. 1. Selection of machine tools Different parts should be processed on different CNC machine tools, so CNC machine tools should be selected according to the design requirements of the parts. 2. Selection of tool setting point and tool change point. Tool setting point: it is the starting point of the tool relative to the workpiece in index control machining. Tool change point: It is set for the programming of multi-tool machining such as machining centers and CNC lathes. In programming, the workpiece is regarded as stationary, while the tool is moving. The tool setting point is usually called the program origin. The key points for selection are: easy alignment, convenient programming, small tool setting error, and convenient and reliable inspection during processing. The tool setting point should be coincident with the tool position point during tool setting. 3. Selection of processing method and determination of processing plan. The selection principle of processing method is the processing accuracy and surface roughness requirements of the processed surface, but in actual selection, the shape, size and heat treatment requirements of the parts should be fully considered. When the processing plan is determined, the processing method required to meet these requirements should be preliminarily determined based on the accuracy and roughness requirements of the main surface. 4. Machining allowance selection Machining allowance: the amount generally refers to the difference between the size of the rough body and the size of the part. There are two principles for the selection of machining allowance, one is the principle of small machining allowance, and the other is that there should be sufficient machining allowance, especially for a process. 5. Determination of cutting parameters Cutting parameters include cutting depth, spindle speed and feed. The depth of cut is determined according to the rigidity of the machine tool, fixtures, tools and workpieces, the spindle speed is determined according to the allowable cutting speed, and the feed rate is determined according to the machining accuracy and surface roughness requirements of the parts and the material properties of the workpiece. 6. Selection of the feed route The feed route includes the content of the processing technology, which is an important reference basis for writing programs. The above is the entire content of the article. I hope that through the introduction of this article, everyone can benefit from it. (Picture/text http://www.wxdtc.com/)