What is the difference between the choice of the angle of the rough and the fine?
It depends on the kind of material you are working on.The selection of the front angle: generally rough car to take a smaller front angle or negative rake angle, the purpose is to improve the cutting edge of the force and heat conditions, improve the cutting edge strength and impact resistance. In order to reduce the elastic and plastic deformation when the chip is cut off and the friction resistance between the chip and the front, the cutting force and cutting heat are reduced, and the machined surface quality is improved.After the selection of angle: rough machining, in order to ensure the strength of the cutter, choose the smaller angle; finishing, to ensure the surface quality, should be selected after a larger angle;The selection of the main deflection angle: roughing should choose a larger main angle, in order to reduce vibration, improve the durability of the tool and chip;The selection of the auxiliary deflection angle: the side slip angle should be smaller to reduce the residual area and reduce the surface roughness value;The choice of cutting edge angle: select negative value in roughing process, the purpose is to improve the heat dissipation condition and impact resistance, take the positive moment when finishing, improve the surface quality.
Did not understand your specific meaning, the angle of the lane is not the angle between the axis, the tool can be used to adjust the holder.Should be the angle of the lane itself, that is, the angle of the cutting tool. Rough machining of the general lathe because of large, large force, so the cutting tool should not be too sharp, otherwise easy to break. Fine Lane because the feed is very small, less force than the general blade angle. At the same time, it can prevent the metal filings in the gap between the workpiece and the cutting tool. Therefore, in the selection of turning tools, it looks thick and blunt is generally rough turning.
The main problem is that the car and the rough car is screaming, usually with 08 or 12 sharp corners of the car, the car is generally used in the fine, boring with a fine of 02
