The Geometric Angles of CNC Turning and Milling Machine Tools Are Mainly Considered

In 2024, turn-milling machine tools will undergo great changes. In fact, many new methods have been added since 2023. When turning slender shafts, due to the poor rigidity of the workpiece, the shapes of the turning tool have a significant impact on the vibration of the workpiece. The reasonable selection of the geometric angles of the CNC turn-milling machine tools mainly considers the following points:

(1) Due to the poor rigidity of the slender shaft, in order to reduce the bending of the slender shaft, the radial cutting force is required to be as small as possible. The main rake angle of the turning tool is the main factor affecting the radial cutting force. Without affecting the strength of the tool, the main rake angle of the turning tool should be increased as much as possible. The main rake angle of the turning tool is K, = 80.-93..

(2) In order to reduce the cutting force and cutting heat, a larger rake angle should be selected, and y. = 15.-30..

(3) The front of the turning tool should be ground with a chip breaker groove of R1 5~mmm to make the chips curl and break smoothly.

(4) Select the positive edge inclination angle, y. = 3., so that the chips flow to the surface to be processed and the chip curling effect is good.

(5) The surface roughness of the cutting edge is required to be below R. 0 4 cape and should always be kept sharp.

(6) In order to reduce radial cutting force, the turning and milling compound machine tool should choose a smaller arc radius (r. < 0.3mm). The width of the chamfer should also be selected to be small, taking the chamfer width of 6, - = 0 5, (, is the feed amount).