| 摘要 |
A thread rolling attachment ( 50 ) is adapted to be mounted on a machine tool and to be selectively moved in an axially direction relative to a workpiece (W) having a cylindrical surface upon which a thread is to be rolled. The improvement broadly includes a center plate ( 62 ) having three circularly-spaced detents ( 82 ); a front plate ( 66 ) having a central portion ( 70 ) arranged in axially-spaced relation to the center plate and having three circularly-spaced lugs ( 71 ) extending toward the center plate such that their distal end faces are adapted to engage and bear against a center plate surface ( 81 ); a recess ( 73 ) extending into each lug from such distal surface, each recess adapted to receive a respective one of the detents for angularly orienting the center and front plates relative to one another; three eccentric roll pins ( 63 ) having their opposite marginal end portions journalled on the center and front plates, and spaced equally from one another about an imaginary circle; a thread roll ( 65 ) rotatably mounted on each eccentric roll pin; and a plurality of fasteners ( 68 ) operatively arranged to selectively hold the center and front plates together; whereby, when the thread rolling attachment is assembled, the front plate will have improved rigidity and will be less susceptible to deformation.
|
