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CNC Machining Principles

Oct 09, 2020

Determination of processing route

The feed processing route of the CNC lathe refers to the path that the turning tool moves from the tool setting point (or the fixed origin of the machine tool) until it returns to this point and ends the processing program, including the path of cutting processing and non-cutting such as cutting in and out of the tool Empty travel path.

The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke.


In CNC lathe processing, the determination of the processing route generally follows the following principles

The accuracy and surface roughness of the processed workpiece should be guaranteed.

Make the processing route the shortest, reduce the idle travel time, and improve the processing efficiency.

Simplify the workload of numerical calculation as much as possible and simplify the processing procedure.

For some reusable programs, subroutines should be used.


Pros and cons

CNC machining has the following advantages:

The number of tooling is greatly reduced, and complex tooling is not required for processing parts with complex shapes. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.

The processing quality is stable, the processing accuracy is high, and the repeat accuracy is high, which is suitable for the processing requirements of aircraft.

The production efficiency is higher in the case of multi-variety and small batch production, which can reduce the time of production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of the best cutting amount.

It can process complex profiles that are difficult to process by conventional methods, and even process some unobservable processing parts.

The disadvantage of CNC machining is that the cost of machine tools is expensive and requires a high level of maintenance personnel.