Selection method of CNC milling machine and its accessories

　　 CNC milling machine is an automatic processing equipment developed on the basis of general milling machines. The processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine. Among them, a CNC milling machine with a tool magazine is also called a machining center. The following cnc processing briefly introduces the selection method of the CNC milling machine and its accessories:

　　 1. How to choose milling machine equipment

　　(1) Choose according to the size of the processed part

　　The lifting table type CNC milling machine with smaller specifications is most suitable for the processing of small and medium parts and the task of contour milling of complex shapes. Larger specifications such as gantry milling machines are used to solve the processing needs of large-scale and complex parts.

　　(2) Choose according to the accuracy requirements of the processed parts

　　 my country has formulated the precision standards for CNC milling machines, among which CNC vertical milling machines have professional standards for lifting table milling machines. In fact, the factory precision of the machine tool has a considerable reserve. Therefore, from the perspective of accuracy selection, the general CNC milling machine can meet the processing needs of most parts. For parts with higher precision requirements, a precision CNC milling machine should be considered.

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

　　 For the processing part is a frame-shaped plane or steps of unequal height, then the CNC milling machine with the point linear system can be used.

　　 If the processing part is a curved surface profile, the two-coordinate linkage and three-coordinate linkage system should be selected according to the geometric shape of the surface.

　　 It is also possible to add a numerical control indexing head or numerical control rotary table based on the general numerical control milling machine according to the processing requirements of the parts. At this time, the system of the machine tool is a four-coordinate numerical control system, which can process spiral grooves, blade parts, etc.

　　(4) Choose according to the batch of parts or other requirements

　　 For mass users, special milling machines can be used. If it is a small-to-medium batch and it is frequently and repeatedly put into production periodically, then the use of a CNC milling machine is very suitable, because the first batch of multiple fixtures, programs, etc. can be stored and reused.

　　 2. Select the tool according to the geometry of the processed part

(1) When machining curved parts, in order to ensure that the cutting edge of the tool and the machining contour are tangent at the cutting point, and to avoid interference between the cutting edge and the contour of the workpiece, a ball-end knife is generally used, a two-edge milling cutter for rough machining, semi-finishing and Four-flute milling cutter for finishing.

　　(2) When milling large planes: In order to improve production efficiency and improve the surface roughness of the machined surface, insert-type disc milling cutters are generally used.

　　(3) General purpose milling cutters are generally used when milling small or stepped surfaces.

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

　　(5) Hole processing tools such as drills and boring cutters can be used for hole processing.

　　 3. Selection of special cutting oil

　　Special cutting oil is a kind of medium that must be used in CNC cutting process, which mainly plays the role of lubrication, cooling, cleaning, etc. during the machining process.

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

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

　　(3) The dedicated cutting oil has passed strict tests in terms of viscosity, flash point, pour point, thermal conductivity, etc. to meet the needs of various cutting processes.

Selection method of CNC milling machine and its accessories

　　 The above is the selection method of CNC milling machine and its accessories. Choosing appropriate equipment, cutting tools and special cutting oil can effectively improve the quality of the workpiece.