A tool for forming an attachment pad on a sheet material includes an anvil supported on a housing and defining a working axis for forming the pad. A slide block is supported on the housing for movement at least along the working axis, and a die block is supported opposite the slide block and is movable in directions along the working axis to cooperate with anvil to form the pad. At least one actuator on the housing biases the slide block in a direction toward the die block. The actuator is operable in a first mode wherein the slide block is movable toward and away from the die block, and a second mode wherein the slide block is locked against movement in a direction away from the die block. A selectively adjustable counterbalance device cooperates with the actuator to counterbalance a force applied to the slide block by the actuator.

A tool for forming an attachment pad on a sheet material includes an anvil supported on a housing and defining a working axis for forming the pad. A slide block is supported on the housing for movement at least along the working axis, and a die block is supported opposite the slide block and is movable in directions along the working axis to cooperate with anvil to form the pad. At least one actuator on the housing biases the slide block in a direction toward the die block. The actuator is operable in a first mode wherein the slide block is movable toward and away from the die block, and a second mode wherein the slide block is locked against movement in a direction away from the die block. A selectively adjustable counterbalance device cooperates with the actuator to counterbalance a force applied to the slide block by the actuator.

The invention relates to a punch press with a crank or eccentric drive, including a crank or eccentric shaft (1a, 1b) and active connecting rods (9a, 9b) for generating the stroke movement of the press ram (13). Furthermore, the punch press includes balancing weights (2a, 2b) for balancing the vertical and horizontal mass forces and is designed in such a way that the horizontal drive movements required for the horizontal mass balancing are tapped directly at the crank or eccentric shaft (1a, 1b), preferably laterally at the crank or eccentric shaft (1a, 1b).

A manually operated press comprising an actuating member coupled to a shaft, wherein an actuation of the actuating member is converted into a stroke movement of a press ram coupled to the shaft, and hence also into a change in a relative position of the press ram. The press furthermore comprises a reset mechanism for resetting the actuating member, which reset mechanism counteracts the actuation of the actuating member and causes a return movement of the press ram opposite the stroke movement. The reset mechanism comprises a spiral spring.

A compliance unit 10 includes a support plate 11, an attaching plate 12, and a fixing disk 22 that has a cylindrical portion 24 fixed to the support plate 11, and an annular, arc surface 26 is formed in a front surface of an annular portion 25 that is provided at a tip of the cylindrical portion 24 so as to protrude radially outside the cylindrical portion. A movable plate 31 is disposed between the annular portion 25 and the support plate 11, and the movable plate 31 is fastened to the attaching plate 12. The attaching plate 12 is provided with an abutment surface 37 opposing the arc surface 26, and the attaching plate 12 is movable to a position where the abutment surface 37 abuts on the arc surface 26 and a position where the abutment surface 37 is separate from the arc surface 26 via a gap 38 between the abutment surface and the arc surface 26.

A dynamic balance device for a press machine includes a plurality of cam portions which transmit a vertical motion of a slide to a balance weight to move the balance weight in a reverse direction of the vertical motion of the slide. The cam portions are each movable in a direction substantially orthogonal to a moving direction of the slide, and each include a first inclined surface and a second inclined surface. The first inclined surface has an inclination angle corresponding to an inclination angle of an inclined surface formed on a member which is provided integrally with the slide and vertically moves with the slide. The second inclined surface has an inclination angle corresponding to an inclination angle of an inclined surface formed on the balance weight.

The disclosure pertains to a fine blanking press comprising a first press unit comprising a first press drive for driving the first press unit in a first driving movement during a fine blanking process step, and a second press unit wherein the second press unit is driven in a second driving movement at least partially during the first driving movement of the first press unit, and wherein a force control unit exerts a counter force against a force exerted by the first press unit during its first driving movement, and wherein the force control unit comprises at least one sensor and a controller operative to receive measuring data collected by the at least one sensor, and wherein the controller is configured to carry out a closed loop control on basis of the received measuring data. The disclosure further pertains to a method for operating a fine blanking press.

The disclosure pertains to a fine blanking press comprising a first press unit comprising a first press drive for driving the first press unit in a first driving movement during a fine blanking process step, and a second press unit wherein the second press unit is driven in a second driving movement at least partially during the first driving movement of the first press unit, and wherein a force control unit exerts a counter force against a force exerted by the first press unit during its first driving movement, and wherein the force control unit comprises at least one sensor and a controller operative to receive measuring data collected by the at least one sensor, and wherein the controller is configured to carry out a closed loop control on basis of the received measuring data. The disclosure further pertains to a method for operating a fine blanking press.

A dynamic balance device for a press machine includes a plurality of cam portions which transmit a vertical motion of a slide to a balance weight to move the balance weight in a reverse direction of the vertical motion of the slide. The cam portions are each movable in a direction substantially orthogonal to a moving direction of the slide, and each include a first inclined surface and a second inclined surface. The first inclined surface has an inclination angle corresponding to an inclination angle of an inclined surface formed on a member which is provided integrally with the slide and vertically moves with the slide. The second inclined surface has an inclination angle corresponding to an inclination angle of an inclined surface formed on the balance weight.

A compliance unit 10 includes a support plate 11, an attaching plate 12, and a fixing disk 22 that has a cylindrical portion 24 fixed to the support plate 11, and an annular, arc surface 26 is formed in a front surface of an annular portion 25 that is provided at a tip of the cylindrical portion 24 so as to protrude radially outside the cylindrical portion. A movable plate 31 is disposed between the annular portion 25 and the support plate 11, and the movable plate 31 is fastened to the attaching plate 12. The attaching plate 12 is provided with an abutment surface 37 opposing the arc surface 26, and the attaching plate 12 is movable to a position where the abutment surface 37 abuts on the arc surface 26 and a position where the abutment surface 37 is separate from the arc surface 26 via a gap 38 between the abutment surface and the arc surface 26.