Abstract: A press working die assembly includes a pad secured to an upper die holder so as to be movable upward and downward, a machining slide cam slidable laterally along a cam surface and having a bending edge at one end thereof, a rotatable rotary cam having a bending portion for forming a negative angle portion of a workpiece, and a reciprocating driving apparatus configured to rotate the rotary cam to a workpiece machining position. The reciprocating driving apparatus includes a slide block having a cam surface for rotating the rotary cam in a predetermined direction on an front end side and a rotation impelling surface configured to rotate the rotary cam back to its original position, and a restoring action block configured to come into abutment with the rotation impelling surface of the slide block when the slide block retracts to restore the rotary cam to its original position.

Abstract: A device and method for forming notches in tubes or other parts includes a roller that travels along a non-linear path. The roller may include a component of motion away from the part to reduce bulging or other deformations in an outer surface of the part that could otherwise result from a straight roller path.

Abstract: The invention concerns a multistage press, at which within the machine-mounted clamping plate (1), an insert (3) is arranged which can alternatingly be moved in the direction towards the press plunger (2) and away from it. The insert (3) is moved up and down by a cam drive actuated by the press main drive with lifting and lowering cams (5), whose cam tracks (8a, 8b) are traced by lifting rollers (6) and lowering rollers (7) under compressive prestress. Such a multistage press can be operated with a high number of strokes per minute and has, at the same time, an excellent precision of the stroke movement.

Abstract: A cam follow arrangement has a rectangular-shaped through hole formed in an end portion of a ram member, the through hole having first and second opposed ends and a pair of parallel sides. A slider which is disposed in the rectangular-shaped through hole is configured to be slidable back and forth along the parallel sides toward and away the first and second ends. A spring is disposed between the slider and the first end of the rectangular-shaped through hole to bias the slider toward the second end of the rectangular-shaped through hole.

Abstract: The machine (20) comprises: a supporting structure (24, 26); a movable unit (28) mounted on the supporting structure (24, 26) so that it can translate along a first working direction (Z) and along a second direction (X) towards and away from a stationary workpiece-carrying structure (88); a tool-carrying unit (10, 11, 12) carried by the movable unit (28); and a driving system for controlling the movement of the movable unit (28) in the working direction (Z). The driving system includes a first motor unit (60) for controlling the rotation of a driving shaft (62) and a mechanism for converting the rotational movement of the shaft (62) into the translational movement of the movable unit (28). The motion conversion mechanism comprises a cam member (76), which is rotatably mounted on the movable unit (28) and the rotation of which is controlled by the driving shaft (62), and a roller member (78) which is rotatably mounted on the supporting structure (24, 26) and on which the cam member (76) rests.

Abstract: In a device for automatically adjusting the control cams of a forging machine, with a releasing means for releasing the operating position of a cam, the cam supporting shaft swingably supports, with a controlled movement with respect to the shaft longitudinal axis, radially extending brackets, in turn supporting a bar extending through the overall length of the control cam supporting shaft, the brackets being moreover provided, at each control cam, with cylinder-piston units including movable pins which can be engaged with recesses formed in the cams.

Abstract: A flexible bushing for a cam follower, comprising a substantially rigid inner sleeve including an inner cam follower engaging surface, a length of the inner sleeve being greater than a thickness of a ram into which the flexible bushing is inserted, a substantially rigid outer sleeve including an outer ram engaging surface, a length of the outer sleeve being substantially equal to the thickness of the ram, the inner and outer sleeves being substantially concentric, and a shock absorbing flexible material disposed between the inner and outer sleeves.

Abstract: A mechanical pressing machine includes a slider mounted on an input shaft at a location below a cam, and a sliding block and a balance weight mounted at locations above the cam. A first cam follower rotatably carried on the slider abuts against a lower surface of the cam and is biased by a spring member toward the lower surface. A second cam follower rotatably carried on a sliding block abuts against an upper surface of the cam and is biased by spring members toward the upper surface. When the cam is rotated together with the input shaft, the slider effects vertical sliding movement through the first cam follower, and the sliding block and the balance weight effect vertical sliding movement in a direction opposite from the direction of movement of the slider through the second cam follower.

Abstract: A mechanical pressing machine includes a slider mounted on an input shaft at a location below a cam, and a sliding block and a balance weight mounted at locations above the cam. A first cam follower rotatably carried on the slider abuts against a lower surface of the cam and is biased by a spring member toward the lower surface. A second cam follower rotatably carried on a sliding block abuts against an upper surface of the cam and is biased by spring members toward the upper surface. When the can is rotated together with the input shaft, the slider effects vertical sliding movement through the first cam follower, and the sliding block and the balance weight effect vertical sliding movement in a direction opposite from the direction of movement of the slider through the second cam follower.

Abstract: An electronic parts-mounting apparatus including a rotating vertical shaft and at least one mounting head arranged around the vertical shaft has a lift cam mechanism that operates to lift and lower an associated one of the at least one mounting head as each mounting head is rotated with the vertical shaft. The lift cam mechanism includes a cylindrical cam having an annular protruding portion concentrically disposed with respect to the vertical shaft that provides upper and lower cam surfaces. Upper and lower rolling cam followers are arranged respectively on the upper and lower cam surfaces of the protruding portion to sandwich the protruding portion therebetween. One end of a support member has one of the upper and lower cam followers mounted thereon and the other end of the support member has the associated one of the at least one mounting head connected thereto.

Abstract: A forging machine (1) comprises at least two forging punches (3) acting against each other and longitudinally guided in a forging box (1), which forging punches each have separate mechanical lifting drives and preferably vertical position adjusting means. To achieve a rugged lifting drive with high machine rigidities and a simplified construction, the lifting drives are comprised of a wobble plate drive (5) including a wobble plate (6) rotatably and drivably, but immovably mounted in the forging box (1) about a wobble axis (T) offset in parallel to the respective forging punch axis (S), and a pressure plate (9) associated to the wobble plate (6) and supported in the manner of a ball-and-socket joint on the end face of the associated forging punch (3) facing the wobble plate, where preferably the forging punches (3) can be pressurized via pressure springs (11) in the sense of a frictional connectoin of wobble plates (6) and pressure plates (9).