What should we pay attention to in cnc machining?

1、 How to divide the cnc process flow?
The division of CNC machining process flow of CNC machine tools can generally be carried out in the following ways:
1. According to the process flow of common tool division, use the same tool CNC to process all the positions that can be carried out on the part. Use the second knife and the third knife to carry out other positions they can carry out. That can reduce the frequency of tool change and shorten the empty tool time.
2. According to its structural characteristics, the processed parts are divided into many parts, such as internal shape, appearance design, inclined plane or plan, etc. Generally, the plan and precise positioning surface are processed first, and then the hole is processed; First process simple geometric shapes, and then process complex geometric shapes; The position with lower precision shall be processed first, and then the position with higher precision shall be processed.
3. The rough and fine CNC machining sequencing method is used for parts that are prone to CNC machining deformation. Because the deformation that is likely to occur after rough machining must be calibrated, generally speaking, the process flow needs to be separated for those that want to carry out rough and fine machining. In general, when zoning the process flow, we must consider the structure and process performance of the parts,
2、 What criteria should be followed for the allocation of CNC machining order?
The allocation of processing sequence shall be based on the structure and rough embryo of parts
1. The CNC machining of the previous process can not harm the accurate positioning and clamping of the next process. If there is a universal CNC lathe machining process in the middle, it should be comprehensively considered.
2. First, carry out the inner wall processing procedure, and then carry out the appearance design processing process.
3. The process flow of CNC machining with the same precise positioning and clamping method or the same knife should be connected to reduce the frequency of repeated precise positioning, tool change and moving pin.
3、 What aspects should be paid attention to when defining the clamping method of the workpiece?
1. We should strive to unify the design scheme, processing technology, and program compilation and calculation standards.
2. Try to avoid clamping frequency, and try to ensure that all surfaces to be machined can be processed by CNC after a precise positioning.
3. Prevent the selection of manpower adjustment plan.
4. The fixture will open smoothly, and its precise positioning and clamping mechanism can not harm the tool walking in CNC machining (such as causing impact). In such cases, you can choose to clamp it with a vise or with a bottom plate drawing screw.