The CNC machining of mechanical parts is composed of basic surfaces such as plane, outer cylindrical surface, inner cylindrical surface or curved surface, and forming surface due to various structural shapes. There are multiple processing methods for each surface. When selecting a CNC processing method, the corresponding processing method and processing plan should be selected according to factors such as the processing accuracy, surface roughness, material, structural shape, size, and production type of the part.

Selection of Surface Machining Methods for CNC Machining Parts

Selection of Surface MachiningThe main processing methods of the outer surface are turning and grinding. When the surface roughness is required to be small, it is necessary to carry out smoothing processing. The closest processing plan can be selected according to the processing surface requirements, the structural characteristics of the parts, the production type, the type of blanks, the CNC processing and the material properties, the size, the geometric accuracy, and the surface roughness requirements, as well as the on-site equipment and other conditions.

The choice of CNC machining plane machining method

The main processing methods of planes are milling, planing, turning, grinding and broaching, etc. The planes with high precision require frequent grinding or scraping.

Selection of CNC machining inner hole surface machining method

The inner hole surface processing methods include drilling, reaming, boring, drawing, grinding and finishing. Commonly used hole processing programs should be selected reasonably according to the processing requirements, size, specific production conditions, batch size, and whether there are pre-made holes on the blanks and other conditions of the processed holes.

Factors affecting cold work toughness in cnc machining parts

• Processing raw material elements, the hardness of the processed raw materials is small, and the more important the level of cooling toughness of raw materials with large plasticity.
• The form elements of the tool, the rake angle of the cnc processing tool, the fillet of the blade, and the amount of wear on the back of the tool have a great influence on the cooling hard layer. When the front angle decreases and the mouth and rear wear increase, the depth and hardness of the cold hard layer also increase.
• The cutting parameters of cnc parts processing, the changes of cutting speed and supply have a great influence on the cold hard and hard. When the cutting speed increases, the contact time between the tool and the workpiece processed by the close parts is short, the level of plastic deformation is small, and the hard layer and hardness are reduced.