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HELICAL BROACH AND BROACH PROCESSING METHOD
HELICAL BROACH AND BROACH PROCESSING METHOD
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机译：螺旋展开法及处理方法
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摘要
PROBLEM TO BE SOLVED: To shorten a processing time, and to improve processing accuracy.;SOLUTION: A plurality of cutting edges 5 projecting to the outer peripheral side are integrally formed with a broach body 1 in an outer peripheral part of the axial broach body 1, and the cutting edges 5 are arranged in a spiral shape by twisting around an axis Oa of the broach body 1 toward the rear end side from the tip side of the broach body 1 by forming a row. The plurality of cutting edges 5 on the tip side of the broach body 1 are formed as an outer diameter rise blade 6, and the plurality of cutting edges 5 on the rear end side are formed as a tooth thickness rise blade 7. In the tooth thickness rise blade 7, the cutting edge is formed in a crossing ridge line part between a rake surface of turning to the tip side of the broach body 1 and a side surface on the acute angle side in the circumferential direction of the broach body 1 and a crossing ridge line part between the rake surface and a side surface on the obtuse angle side, and a blade groove 5A of the cutting edges 5 is formed so as to twist to the opposite side of the direction for twisting the row of te cutting edges 5 toward the rear end side from the tip side of the broach body 1 or to extend along a reference surface Ob orthogonal to the axis Oa.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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