With hard steel of temper by dipping in water of vehicle of fine of PCBN cutting tool

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The treatment craft of convention of workpiece of hard steel of temper by dipping in water is kibble, essence is ground, contemporary cutting machines the development with technology of cutting tool material, the turning technology that can use high accuracy replaces grinding treatment, the finish machining open up that is hard work of temper by dipping in water the new approach of a quick economy. Workpiece of hard steel of fine vehicle temper by dipping in water, only play of the ability when 45HRC of hardness prep above gives cubic nitrogen to change the powerful dominant position of boracic PCBN cutting tool. Quench in cutting hardness (when the workpiece of 58 ～ 63HRC) , cutting speed V is 90 ～ commonly 160m/min, workpiece hardness is taller, cutting speed appropriate is lower, be like the workpiece of turning 70HRC above, v=60 ～ 90m/min. Deepness of fine vehicle cutting 0.

1 ～ 0.

3mm, feed 0.

05 ～ 0.

25mm/r, the workpiece surface surface roughness after fine vehicle can amount to Ra0.

3 ～ 0.

6, dimension precision can be amounted to 0.

013mm. If use the lathe of standard numerical control with better tigidity to machine, tigidity of PCBN cutting tool and point protection are better, criterion the exterior surface roughness after fine vehicle can amount to Ra0.

3, dimension precision can be amounted to 0.

01mm, reach the level of grinding of use numerical control. Also but fine vehicle is intermittent the surface, it is cutting speed wants only proper, tigidity of system of machine tool treatment wants first-rate, the PCBN that should choose high content is compound bit. General mental allowance is when fine vehicle 0.

3mm left and right sides, allow to fall to make sure surplus is even as far as possible in the condition, need to raise the dimension precision before quenching namely, because even mental allowance can prolong life of PCBN cutting tool. Car of essence of life is average need not cutting fluid, because cutting rate is higher, much quantity of heat will by cut bits to take away, very few meeting produces fire damage and heat to be out of shape in workpiece surface. The 80 ° lozenge with tenacity of bit appropriate choice and high intensity () of CNGN razor blade, radius of circular arc of point of a knife is in 0.

4 ～ 1.

Between 2mm, although radius of point of a knife is bigger, the workpiece surface surface roughness after treatment is worth lower, but cutting force can increase, the treatment system that causes rigid inadequacy arises brace up quiver. Because this wants,choose circular arc of appropriate point of a knife according to producing a situation actually. PCBN cutting tool is necessary to use diamond emery wheel to pour horny passivation to handle to point before use, in order to protect its point. When using turning technology, must undertake with quenched good stuff rough machining or finish machining experiment beforehand. Current, home already had a lot of units to use with the car era grinds treatment to quench steel craft, the PCBN cutting tool that with me like plant of some large gear wheel the company manufactures (cementite of CNMN120408 ZB3000X) treatment quenchs (the aperture inside the gear of horn of 20CrMnTi car basin of 58 ～ 63HRC) , use V=150mm/min, f=0.

1mm/r, ap=0.

2 ～ 0.

3mm machines parameter, came true to be ground with car generation, journey of cutting tool cutting is achieved 10.

5km. The 2-3 that machining efficiency is before times, greatly the manufacturing cost such as investment of economic electric power, artificial, equipment. PCBN cutting tool is a kind of cutting tool stuff that has an outlook very much, although have very good cutting property, but very tall also to use condition requirement, because this chooses PCBN cutting tool and name correctly only, choose appropriate treatment parameter, ability reduces sheet cutting tool charge, create enormous economic benefits thereby. CNC Milling CNC Machining