Steps Of Nc Machining Process

[Gannon Siegal]

NC machining process of workpiece

4.7.3.3 planning of processing object and processing area

⑴ the shape of processing surface is quite different and needs to be processed in different areas
⑵ the size of different areas of the machined surface varies greatly, so it needs to be processed in different areas
⑶ in order to effectively control the machining residual height, different tool path forms and row spacing should be used for zonal machining according to the change of curved surface

4.7.3.4. Processing route planning

⑴ the processing of the previous process shall not affect the positioning and clamping of the next process
⑵ the machining sequence should be from rough machining to finish machining, and the machining allowance should be from large to small
⑶ carry out the processing of inner cavity first, and then the processing milling operation of outer shape
⑷ try to use the same positioning and clamping methods or the same knife processing process, and reduce

the number of tool changes and the number of moving pressing elements
⑸ for multiple processes in the same installation, the process with less rigid damage to the workpiece shall be arranged first
4.7.3.5 planning of processing technology and processing method

⑴ tool selection. Select appropriate tools for different machining areas and types
⑵ tool path type selection. Select the appropriate tool path form for different processing areas, processing types and processing procedures
⑶ error control. Determine reasonable programming errors and leave room for other errors. (3) error control
determine reasonable programming errors and leave room for other errors
⑷ residual height control. Determine the reasonable tool path spacing according to the tool parameters and machining surface characteristics

on the premise of ensuring the surface quality, improve the machining efficiency as much as possible
⑤ cutting process control. Including cutting parameters (back equator, feed rate, spindle speed),

machining allowance, tool advance and retreat, coolant control and many other contents, which are important factors affecting machining accuracy, surface

quality and machining loss
6) safety control. Including the determination of safe height and avoidance area.

1, part drawing analysis

2, processing route arrangement and workpiece clamping method

3, NC processing process card

4, tool selection

5, cutting parameter selection

rough turning, semi fine turning and fine turning