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.
摘要:
An improved tool holder, such as a shave tool (20), broadly includes: an adapter plate (23) adapted to be mounted on the screw machine (21) for controlled movement toward and away from the workpiece (W); a tool block (24) slidably mounted on the adapter plate for relative movement relative thereto along a first axis (x—x); a slide body (25) mounted on the tool block for rotation relative thereto about a second axis (y—y), an adjustment mechanism (28) acting between the slide body and the tool block for controllably varying the angular position of the slide body relative to the tool block; and a head (26) slidably mounted on the slide body for movement relative thereto along a third axis (z—z). The head has a roller (22) and cutting tool (T) spaced from the roller.
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.
摘要:
The invention provides an improved method and apparatus for indicating an apparent error in the operation of a fluid-powered thread-forming attachment (A) mounted on a machine tool for controlled movement toward and away from a workpiece (W) upon which a thread is to be formed during a thread-forming cycle. The improved apparatus (60) broadly includes a fluid-powered actuator (64) for selectively moving the thread-forming attachment (A) relative to workpiece (W) during the cycle; a sensor (73) operatively arranged to monitor the pressure within the actuator during at least a portion of the cycle, and arranged to provide an output signal; and a programmable logic unit (75) provided with the sensor output signal, arranged to store minimum and maximum permissible fluid pressure values expected during the cycle, and operatively arranged to indicate an apparent error in the formation of a thread on the workpiece if the pressure determined by the sensor is not between the stored minimum and maximum values.
摘要:
A tangential rolling attachment (20) for a machine tool, broadly includes a body (21); a pair of arms (22L, 22R) having their proximal marginal end portions (23L, 23R) pivotally mounted on the body and having distal marginal end portions (24L, 24R). The arms are biased to move in opposite angular directions such that the distal marginal end portions thereof will be urged to move away from one another. A roll (28L, 28R) is pmounted on the distal marginal end portion of each arm for imparting an action to a workpiece when the attachment is moved to tangentially engage the workpiece. A wedge (29) is mounted on the body for movement relative thereto in a direction parallel to the longitudinal axis of the workpiece. An actuator (30) mounted on the body for selectively moving the wedge relative to the body to vary the spacing between the axes of the rolls. The improved rolling head may also incorporate a quick-release mechanism (33L, 33R) for mounting a roll on the arm of the machine tool attachment.