CNC machining, CNC machining refers to the processing of CNC machining tools. CNC exponential machine tools are programmed and controlled by numerical control language, usually G code.
The G code language of NC machining tells the Cartesian position coordinates used by the machining tool of NC machine tools, and controls the feed speed of the tool and the spindle speed, as well as the functions of tool converter and coolant.
Numerical control machining has great advantages over manual machining. For example, the parts produced by numerical control machining are very accurate and reproducible. CNC machining can produce parts with complex shapes that cannot be completed by manual machining.
General CNC processing usually refers to precision machining, CNC machining lathe, CNC machining milling machine, CNC machining boring and milling machine, etc
Advantages and disadvantages of CNC
CNC machining has the following advantages:
（1） Greatly reduce the number of tooling, processing parts with complex shapes do not need complex tooling. If you want to change the shape and size of the parts, only need to modify the parts processing program, suitable for new product development and modification.
(2) Stable processing quality, high processing accuracy, high repetition accuracy, adapt to the processing requirements of aircraft.
(3) The production efficiency is higher in the case of multiple varieties 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.
（4） It can process complex profiles that are difficult to be processed by conventional methods, and even some machining parts that cannot be observed.
The disadvantage of CNC machining is that the cost of machine tools and equipment is expensive and the maintenance personnel are required to have a high level.
Principle: Simplify processing procedures
Advantages: stable processing quality, high processing precision
Machining: CNC machining route determination
CNC lathe feed processing route refers to the turning tool from the point of the tool (or machine tool fixed origin) began to move, until returning to the point and the end of the processing program through the path, including the cutting path and cutting tool, cutting out and other non-cutting air travel path.
The feed route of finishing is basically carried out in the order of the contour of its parts. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and empty stroke.
In CNC lathe processing, the determination of the processing route should generally follow the following principles.
(1) should be able to ensure the accuracy and surface roughness of the workpiece.
（2）The shortest processing route, reduce the empty travel time, improve the processing efficiency.
（3） Try to simplify the workload of numerical calculation and simplify the processing procedure.
（4）For some repeated use of the program, should use subroutine.
