Reamer of hard alloy of small diameter Chan Ren
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Material of head of knife of reamer of reamer structure characteristic is hard alloy YG8, YT5, YT15 to wait. Arbor is made with tool steel T8, T12 or high-speed steel W9Cr4V2. Process hardware data according to place, 10 ° of ～ of O=0 of γ of the horn before reamer, make its more keen. 45 ° of ～ of ° of R=5 of κ of tool cutting edge angle (treatment steel 25 ° of ～ of κ R=15 ° are beautiful) . Line of center of tower above of point of a knife 0.
02 ～ 0.
05mm. Reamer is with odd blade cutting, the opposite side cutter hub of its edge is divided outside having bearing effect, still rise decrease brace up the action that already machined the surface, surface surface roughness that reduces aperture to be worth with extruding level off. The chamfer holding bit of reamer is big, unobstructed of cutting fluid pass in and out discharges bits easily. Reamer is made with oneself cutter hub guide, can machine deeper aperture, the linearity of its aperture is better. Bore with a reamer cuts the structure that ° of S=10 of λ of the dip that take blade can use when via, direct with making cut bits ahead is poured out of. 2.
Note reamer clip maintains the strength with bit due and fair share. The hardness of cutter hub part should be more than 50HRC, the wearability with raising cutter hub and prevent the card that cut bits to die in cutter hub and spare parts surface, destroy quality of spare parts surface. The cutting liquid that has constant pressure had better be used when bore with a reamer is cut, alignment knife chamfer is irruptive, be helpful for discharging bits, can reduce surface roughness of spare parts surface to be worth, improve cutting tool life. 3.
Applied effect this reamer is OK bore with a reamer cuts 7 class precision all sorts of material are qualitative (include to quench the steel of hardness 45HRC) aperture, does bore with a reamer cut surface roughness of spare parts surface to be worth: ? A=0 of Zuo of aim pa .
8 μ M, aluminium reachs cupreous Ra=0.
4 μ M. Reamer life raises nearly 10 times than high-speed steel reamer, and can use at high speed cutting, improved manufacturing efficiency greatly. CNC Milling