Patent ID: 6540446
Filing Date: 2003-04-01
Classification: B23F,Y10T

Abstract:
A cutter head assembly for cutting a workpiece, comprising:a main body which is to be rotated about an axis thereof, and which has at least one cutting-blade receiving bore offset from said axis and extending from an axially distal end face of said main body toward an axially proximal end face of said main body, said main body further having at least one clamping-member receiving bore unparallel to said cutting-blade receiving bore and partially interfering with said cutting-blade receiving bore; at least one generally cylindrical cutting blade each received in a corresponding one of said at least one cutting-blade receiving bore and having a flat surface formed as a part of an outer circumferential surface thereof and parallel to an axis of said cutting blade, said cutting blade further having a cutting edge in an axially distal end portion thereof which projects from said axially distal end face of said main body; and at least one generally cylindrical clamping member each received in a corresponding one of said at least one clamping-member receiving bore and having a fitting portion and a cam portion, said cylindrical clamping member being fitted at said fitting portion in said clamping-member receiving bore, said cam portion having a cam surface whose radial distance from an axis of said fitting portion changes in a circumferential direction of said cylindrical clamping member, wherein said cylindrical clamping member is rotated about said axis of said fitting portion, for thereby selectively establishing a clamping state in which said cam surface is brought into contact with said flat surface of said cutting blade so as to press said cutting blade onto an inner circumferential surface of said cutting-blade receiving bore, and an unclamping state in which said cam surface is separated from said flat surface of said cutting blade.