A crank press with an adjustable stroke comprises a press frame having a frame slideways therewithin with a slider reciprocatively movable therealong and supported by a pneumatic cylinder. In order to significantly increase a working force, a length of the working stroke and efficiency, the crank press further comprises: at least two mutually synchronized crank drives configured for reciprocatively moving the slider along the frame slideways, a lever-crosspiece mechanism having at least one pair of threaded guide stanchions secured within the frame bed, a crosspiece slidably mounted on the guide stanchions atop the slider, at least two two-arm levers hingedly connected to the slider supportadly on the crosspiece, at least one pair of crosspiece stop nuts engaged with threads of the guide stanchions and configured for arresting the cross-piece at the moment of applying a force to the slider by the lever and a switching arrangement for slider reversal with regulation of its stroke.

A tab stock feeder assembly for a press includes a plurality of support elements, a plurality of rotating elements, and a number of operative elements. Each rotating element is rotatably coupled to an associated support element. Each operative element coupled to at least one of the support element or one of the rotating element and wherein each the operative element is structured to be engaged by a rotating element. The tab stock feeder assembly further includes a wear reduction assembly including a plurality of wear reducing elements. A plurality of support elements have at least one wear reduction assembly wear reducing element disposed between a rotating element and the associated support element.

There is provided a press device including a reference operation setting unit that sets a reference transport motion of a transport device which corresponds to a predetermined reference press motion of the slide, a timing setting unit that sets a synchronous timing of the reference transport motion for the reference press motion, a press operation setting unit that sets a press motion of an actual operation by extending a time of a part of the reference press motion, and a transport operation setting unit that sets a transport motion of the actual operation which corresponds to the press motion by matching synchronous timings with each other between the press motion and the reference transport motion for the reference press motion, and by setting an operation pattern from the synchronous timing to be the same as that of the reference transport motion.

A compact press apparatus is provided that is capable of assuring the acceptability of a pressing, and in which the pressing location tends not to be restricted. Such a press apparatus includes a frame (1, 77) and a servopress (31, 50, 60, 101). A servomotor (33, 52, 62, 103) is provided within a first frame part (11, 17, 19, 79) or within a connecting-frame part (15, 83). At least a portion of a power-transmission mechanism (40, 56, 66, 90, 110) is provided within the first frame part (15, 83).

There is provided a press machine capable of simplifying a slide drive mechanism. The press machine comprises: a slide supported so as to be reciprocally movable; a crankshaft arranged along a longitudinal direction of the slide and having a plurality of eccentric parts; a drive unit configured to rotate the crankshaft; a plurality of yokes and each provided to each of the eccentric parts of the crankshaft and configured to reciprocate, due to rotation of the crankshaft, along a moving direction of the slide; and a plurality of points each connects each of the yokes to the slide, wherein at least one of the plurality of yokes is connected to the slide via some of the plurality of points arranged along a direction perpendicular to an axial direction of the crankshaft.

A thermoforming machine is provided having at least one frame member and a thermal regulator. The thermal regulator is provided in heat transfer relation with one of the at least one frame member configured to control temperature of the one frame member to mitigate thermal deformation of the frame member. A method is also provided.

The invention relates to a press drive for a press or a press having a press drive. The invention also relates to a method for controlling the press drive by means of a control unit. The press drive is used for moving a ram of the press in a stroke direction H between an upper return point OT and a lower return point UT. It comprises a knee lever gear having a first lever and a second lever. A connecting rod engages on the knee lever of the two levers and is connected on the other end to an eccentric of an eccentric drive. The control unit can drive the eccentric drive in a first operating mode B1 or a second operating mode B2 or, in particular, also a third operating mode B3. In the first and the second operating modes B1, B2, the eccentric oscillates in a respectively different angle region W1, W2 about a rotation axis D of the eccentric drive, thus resulting in different force and movement states of the ram in both operating modes.

The invention relates to a method for operating a stamping press (1) with a ram (2) which acts against a bolster plate (3), in particular a fixed bolster plate (3), and whose ram position relative to the bolster plate (3) can be adjusted in the intended use, wherein the ram (2) carries a first die part (4) and the bolster plate (3) carries a second die part (5), wherein the two die parts (4, 5) provide associated stop faces (6a, 7a) which, when the die is completely closed, form one or more fixed stops within the die for limiting the closing dimension of the die (4, 5). In accordance with a first method according to the invention, the distance (a, a1, a2, a3) between the two die parts (4, 5) or a parameter (b1, b2, b3, c) representing said distance is monitored at a certain point (P1, P2, P3) of the ram movement in which the die (4, 5) is not fully closed, and the ram movement is changed as a function of the monitoring result. In accordance with a second method according to the invention, at least one of the fixed stops is monitored for stop contact in the intended use of the stamping press, and the ram position is changed as a function of the monitoring result. With the methods according to the invention, energy-efficient and low-wear process control is possible also for dies (4, 5) with fixed stops, regardless of the skill and experience of the operator.

A servo press machine includes a display unit that displays a strip-shaped region for setting a motion of a slide and an operation unit that receives an input operation. A range extending from an upper end of the strip-shaped region to a lower end thereof corresponds to a movement range of the slide in a linear movement, and the strip-shaped region is formed of a plurality of slide operation regions that are consecutive in a direction in which the strip-shaped region extends. Each of the slide operation regions can set a speed of the slide in response to the input operation received by the operation unit, and a boundary between adjacent two of slide operation regions can move along the direction in which the strip-shaped region extends in response to the input operation received by the operation unit.

A path-controlled press, with at least one drive shaft having a driver that is eccentric relative to a shaft axis, and a sliding block, wherein the sliding block is driven by the driver to perform a forcibly actuated movement During the execution of a pressure stroke, the sliding block is guided on at least one sliding surface on the pressure side in relation to a pressure-side surface of a slide guide. The sliding block has a sliding surface on the pulling side opposite the sliding surface on the pressure side, which is guided on a surface of the slide guide on the pulling side. The sliding surface on the pressure side of the sliding block has a concave or convex curvature. The sliding surface on the pulling side of the sliding block has another respective concave or convex curvature.