For efficient metal cutting processes, the three main elements are the processing material, the cutting tool and the cutting standard. These determine processing time, tool life and quality. Cutting standards must be reasonably selected for cost-effective machining. The three elements of the cutting standard: cutting rate, feed and depth of cut, are directly related to tool damage. The selection of suitable machining standards is to be selected on the premise of these elements. The ideal condition is stable wear and reaching the service life. However, in specific operations, the selection of tool life is related to tool damage, changes in machining specifications, surface quality, cutting noise, machining heat, etc. In determining the machining criteria, research must be carried out according to the actual situation. Auto parts CNC machining for stainless steel, heat-resistant alloys and other difficult-to-machine materials, you can choose a coolant or a good rigidity of the edge.
1, reasonable selection of tools
(1) When rough turning, choose a vehicle with high strength and good durability of the tool.
2）When finishing turning, choose high precision . The tool has good durability to ensure the machining accuracy requirements.
3）Use machine tool and machine insert as much as possible to reduce tool change time and facilitate tool setting.
2、Rational selection of fixture
(1) try to use common fixture clamp workpiece to prevent the selection of special fixture.
(2) reduce positioning errors of parts positioning reference overlap.
3, machining line
Machining line refers to the trajectory and direction of movement of the tool relative to the part in the CNC lathe machining conditions.
1) should be able to ensure machining accuracy and surface roughness provisions.
(2) minimize the machining line and reduce the tool idle time.
4, fixture installation points
At present, the connection between the hydraulic chuck and the hydraulic clamping cylinder is completed by the hydraulic CNC machining tie bar. The key points of the hydraulic chuck are as follows: first remove the nut in the hydraulic cylinder, remove the drawtube, pull out from the back end of the spindle, and then remove the chuck fixing screw.
