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Division of Numerical control machining process

Views: 2     Author: Site Editor     Publish Time: 2022-02-14      Origin: Site

General situation, craft route points to the whole processing route that whole spare part needs to pass to finished product place from rough namely. The formulation of the process route is an important content of precision machining process, the main task is to determine the number of process and process content, select parts of the processing method of each surface, determine the processing sequence of each surface, craft route points to the whole processing route that whole spare part needs to pass to finished product place from rough namely. The formulation of the process route is an important content of precision machining process, the main task is to determine the number of process and process content, select parts of the processing method of each surface and determine the processing sequence of each surface.

NC machining and the process route of ordinary machine tool design, the main difference is that the former is not the whole process from blank to the finished product, but only a few process of NC machining process description, CNC precision machining, CNC machining process generally with the whole process of the parts processing process, so need good interface with other process, This is something to pay attention to in the process design.

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According to the characteristics of CNC precision machining, the division of CNC machining processes can be generally carried out in the following ways:

1. Divide the process according to the clamping positioning method of parts.

Because each part structure shape is different, each processing surface technical requirements are also different. Therefore, when processing, its positioning methods are different. General processing shape, shape positioning; Processing inner shape is to shape positioning, so we can divide the process according to the different positioning mode. Such as sheet CAM, according to the positioning method is divided into two processes, the first process can be carried out on the ordinary machine tool, cylindrical surface and B plane positioning processing section A and ø22H7 inner hole, and then processing end b and ø 4H7 process hole; The second process has been processed by two holes and a face positioning, milling CAM surface curve in CNC milling machine.

2. Division of rough and finish processing.

When dividing the working procedure according to the machining precision, rigidity and deformation of the parts, the working procedure can be divided according to the principle of separating rough and finish machining. That is, roughing and finishing. At this point, different machine tools or different tools can be used for processing. Usually during the installation, it is not allowed to finish machining the surface of one part of the part and then process the other surface of the part. For the parts as shown in the figure, most of the spare parts should be removed first, and then the surface of the parts should be refined again to ensure the machining accuracy and surface roughness requirements.

3. One installation, processing as a process.

This method is suitable for parts of less processing content, after processing can reach the state of waiting for inspection.

4. The same tool processing content division process.

Some precision parts to be machined surface although can be completed in a single installation. However, considering that the program is too long, it will be limited by the amount of memory and continuous working time of the machine tool. For example, a process cannot be finished within a working period. And too long a program can make errors and retrieval difficult. Therefore, in CNC precision machining, the program cannot be too long,each process content cannot be too much.

5. Distinguish the process by the processing part.

For the workpiece to be processed more content, can be divided into several parts according to its structural characteristics, such as cavity, shape, surface or plane, and the processing of each part as a process.

6. Divide the process according to the tool used.

In order to reduce the number of tool changes, compression of empty time, reduce unnecessary positioning errors, can be processed in accordance with the method of tool concentration process parts, that is, in a clamping, as far as possible with the same tool processing other parts, in special CNC machine tools and machining centers usually adopt this method.Centered Cardan Shaft for Truck price-Xin Sanming

The arrangement of processing sequence should be considered according to the structure and blank of parts, as well as the needs of positioning, installation and clamping. The sequence arrangement should generally be carried out according to the following principles:

1. The processing of the upper procedure should not affect the positioning and clamping of the next procedure, and the general machine tool processing procedure should also be considered comprehensively;

2. The first cavity after the shape processing;

3. In the same positioning, clamping way or with the same tool processing process, the best continuous processing, in order to reduce the number of heavy weight positioning knife change times;

4. At the same time, the arrangement principle of cutting order of precision parts should also be followed: first fine after fine, first main after second, first surface after hole, benchmark first.

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  : +86 29 86033971
 : +86 29 86033972
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  : The Innovation Industrial Park, No.36, Jingwei Road ,Xi'an Economic and Technological Development Zone,Xi'an City,Shaanxi Province,China
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