Throw-away cutting tool
AssigneeSumitomo Electric Industries, Ltd.
InventorNaohiro Nakamura
Life of this patent
Estimating the term…
Abstract
In order to improve durability, machining stability, machining accuracy, etc. of a throwaway cutting tool in which a cutting head having a cutting edge is detachably mounted to the tip of a tool body using a clamping tool so that its function can be regenerated by replacing the cutting head, protrusions 8, 16 having their height gradually increasing and recesses 9, 15 having their depth gradually increasing from the center toward outer periphery of the tool are formed alternately with each other in a radial arrangement on the front surface of the tool body 2 and a support surface of the cutting head 3, which is formed by sintering, respectively. The protrusions and recesses, which are provided so that their positions correspond to each other, are conically engaged, thereby centering the cutting head and preventing its movement.
Claims10
A throwaway cutting tool comprising a tool body and a cutting head in abutment with the front surface of said tool body, wherein a plurality of protrusions and recesses of V-shaped section extending from the center of the tool toward its outer periphery are provided radially and alternately with each other on a front surface of said tool body and a support surface of said cutting head, said protrusions having their height gradually increasing and said recesses having their depth gradually increasing from the center of the tool toward its outer periphery, and wherein with the protrusions and the recesses on the front surface of said tool body conically fitted with the corresponding recesses and protrusions on the support surface of said cutting head, said cutting head having a cutting edge is detachably mounted to said tool body with a clamping tool.
A throwaway gun drill comprising a tool body and a cutting head, said tool body comprising a pipe portion and a support member joined to one end of said pipe portion, said tool body having a section perpendicular to the axis that is a ¾ circle and a straight groove in its outer periphery, wherein a plurality of protrusions and recesses of V-shaped section extending from the center of the drill toward its outer periphery are provided radially and alternately with each other on a front surface of said tool body and a support surface of said cutting head, said protrusions having their height gradually increasing and said recesses having their depth gradually increasing from the center of the drill toward its outer periphery, and wherein with the protrusions and the recesses on the front surface of said tool body conically fitted with the corresponding recesses and protrusions on the support surface of said cutting head, said cutting head having a cutting edge and a straight groove connecting with said straight groove of said tool body is detachably mounted to said tool body with a clamping tool.
Dependencies are inferred from the claim text.