In determining the parts of the process, it should be effective in its roughing and finishing phase, the first effective after the roughing of its surface finish and then finishing, as far as possible not to rough, finishing cross, Also do not go to the machine to both roughing for finishing, which is rough, finishing separate.
The advantages of roughing and finishing separate
1 can reduce the impact of thermal deformation. If a process in place, the size of the workpiece cooling and shape tolerances will change and thus can not meet the design requirements.
2. The workpiece in the process of processing the need for finishing and roughing separately is also an effective protection of equipment accuracy requirements, if long-term use of the same equipment both roughing and finishing, will inevitably lead to the loss of accuracy of equipment products quality. The machine tool can be used reasonably, and the deformation and error generated during roughing can be corrected during finishing, which is good for improving the machining accuracy.
3. The machine tool can be used reasonably, and the deformation and error generated during roughing can be corrected during finishing, which is beneficial to improve the machining precision,
4. Early detection of cracks, pores and other rough defects, timely termination of processing.
The difference between roughing and finishing
1. Roughing is the rapid removal of stock allowance for the purpose of roughing should choose a large amount of feed and cutting depth as much as possible in order to cut off as much as possible in a short period of time the chip.
2, the use of fine-grained mounted on the vibration head whetstone finishing surface finishing (see cutting). Finishing generally arranged after the grinding process, the machining margin of only a few microns, suitable for processing crankshaft, roller, bearing rings and various precision components such as the outer circle, the inner circle, the plane, the channel surface and the spherical surface.http://www.pump-casting.com