CNC milling machine is a kind of automatic processing equipment developed on the basis of general milling machine. The processing technology of the two is basically the same, and the structure is also similar. CNC milling machines are divided into two categories: no knife library and knife library. Among them, the CNC milling machine with a knife library is also called a processing center. The following CNC machining briefly introduces the selection method of CNC milling machine and its accessories:

The Selection Method of Milling Machine Equipment

(1) Selection according to the dimensions of the parts to be processed

Small specifications of the lifting table CNC milling machine, it is most suitable for small and medium parts processing and complex shape of the profile milling task. Larger specifications such as gantry milling machine, used to solve the processing needs of large size complex parts.

(2) Selection according to the precision requirements of the processed parts

Our country has formulated the precision standard of CNC milling machine, which has professional standards. In fact, the factory precision of machine tools has a considerable reserve. Therefore, from the perspective of precision selection, the general CNC milling machine can meet the needs of most parts. For parts with high precision requirements, precision CNC milling machines should be considered.

(3) Choose according to the processing characteristics of the processed parts

For the machining part is the frame plane or unequal height of the steps, then choose the point of the linear system of CNC milling machine can be.

If the machining part is a curved surface, the system of two-coordinate linkage and three-coordinate linkage should be selected according to the geometry of the surface.

According to the requirements of the parts processing, on the basis of the general CNC milling machine, the CNC fractional head or CNC rotary table can be added. At this time, the machine tool system is a four-coordinate CNC system that can process spiral slots and blade parts.

(4) Selection based on batch or other requirements for parts

For a large number of users can use a special milling machine. If it is a medium or small batch and is often repeated periodically, then it is very appropriate to use a numerical control milling machine, because the first batch is ready for multiplexing fixtures, programs, etc. can be stored for reuse.

Selection of tools according to the geometry of the parts to be processed

(1) When processing curved parts, in order to ensure that the cutter's cutting edge and the machining outline are tangent at the cutting point, and to avoid interference between the blade and the outline of the workpiece, a spherical cutter is generally used, a two-edge milling cutter is used for rough processing, and a semi-precision machining is used. Four-edge milling cutter for precision processing.

(2) Large plane milling: In order to improve the production efficiency and increase the roughness of the processing surface, generally use a blade inlaid disc milling cutter.

(3) General milling cutter is generally used when milling small planes or steps.

(4) When milling the key slot, in order to ensure the dimensional accuracy of the slot, the two-edged key groove milling cutter is generally used.

(5) When processing holes, drill bits, boring knives and other hole processing tools can be used.

III. Selection of special cutting oil

The special cutting oil is a kind of medium that NC cutting technology must adopt. It mainly plays the role of lubrication, cooling and cleaning in the process of machining.

(1) The special cutting oil contains vulcanized extreme pressure anti-wear additives, which can effectively protect the cutting tool and improve the process accuracy.

(2) The special cutting oil has good stability compared with rapeseed oil, mechanical oil, and regenerated oil, and will not cause harm to equipment, human body, and the environment.

(3) Dedicated cutting oils pass strict tests on viscosity, flash point, tilt point, thermal conductivity, etc. to meet various cutting process requirements.