Abstract: A detection unit for detecting a press position and a load at the press position; an input/storage unit for inputting and storing a value serving as a reference for determining a bend point in a relation between the press position and the load at the press position; a slope calculation unit for calculating a slope of the load based on the press position and the load at the press position, which have been detected; and a bend-point determination unit for determining a point, at which the calculated slope of the load exceeds the value serving as the reference for determining the bend point, as the bend point are provided.

Abstract: A detection unit for detecting a data row of a press position and a load at the press position; an input/storage unit for storing at least a load value serving as references for determining stop or judge; a calculation unit of the value of the slope of the load for calculating the value of the slope of the load based on the press position and the load at the press position detected; a calculation unit of the value of the slope of the slope of the load for calculating the value of the slope of the slope of the load based on the calculated value of the slope of the load; and a determination unit for comparing the calculated value of the slope of the slope of the load with the values serving as the references to determine stop or judge are provided.

Abstract: An agricultural baler having a baling chamber, an intake duct leading into the baling chamber and a stuffer mechanism for transferring slice of crop in the intake duct into the baling chamber, wherein the baler comprises a wall segment positioned substantially in line with an inner wall surface of the baler, the wall segment being suspended from the inner wall surface via at least one load measurement sensor in such a manner that both a load perpendicular to, and a load parallel to the inner wall are derivable

Abstract: An overload protector has an input element, an output element juxtaposed with the input element, and a clamping plate. Fasteners fix the clamping plate to one of the elements against relative movement. A coupling between the clamping plate and the other of the elements permits only limited relative movement of the elements through a stroke having a predetermined length in a predetermined direction. A connector between the clamping plate and the other element fixes the clamping plate and the other element together against relative movement until an overload force greater than a predetermined critical limit is exerted shifting either of the elements toward or away from the other element in the predetermined direction.

Abstract: A press machine controller (10) for controlling a press machine (30) having a servo motor (41) to drive a slide (38) via a reduction mechanism (37) changed in reduction ratio in accordance with the position of the slide (38) is disclosed. The device includes a command generator (20) for generating at least one of a position command, a speed command and a torque command for the servo motor (41); a vibration command generator (13) for generating a vibration command based on a parameter preset for the press machine controller (10); a slide position detector (12) for detecting the position of the slide (38); and a vibration command adding portion (21, 22, 23) for adding the vibration command to any one of the position command, the speed command and the torque command for the servo motor (41) in the case where the slide position is in a predetermined range. The press machine, even if stopped with the slide at the bottom dead center, can be restarted with a small torque.

Abstract: A manually operated press comprises an actuation lever coupled to a shaft assembly. An actuation of the actuation lever is transformed into a stroke movement of a press ram. A clutch assembly is provided for interrupting a flow of force between the actuation lever and the press ram. The clutch is adapted to separate an input shaft from an output shaft depending on predetermined pressing parameters. The input shaft extends as an inner shaft through the output shaft. The clutch assembly has a first clutch designed as a stroke stop for immobilizing the input shaft with a press housing depending on the pressing parameter, and a second clutch designed as an overload clutch for interrupting a flow of force between the input shaft and the output shaft.

Abstract: A manually operated press comprises an actuation lever coupled to a shaft assembly. An actuation of the actuation lever is transformed into a stroke movement of a press ram coupled to the shaft assembly and, accordingly, into a change of a relative displacement position of the press ram. A clutch assembly is provided for interrupting a flow of force between the actuation lever and the press ram. The shaft is at least two-piece, namely configured with an input shaft and an output shaft. The clutch is adapted to separate the input shaft from the output shaft depending on the pressing force and/or the relative displacement position of the press ram. The shaft assembly comprises an input shaft and an output shaft. The input shaft extends as an inner shaft through the output shaft being configured as a hollow shaft.

Abstract: An overload protection control method for a pressing machine capable of performing overload protection with excellent responsiveness with a simple structure is provided. For this purpose, the overload protection control method includes the steps of driving a slide (4) to reciprocate via a mechanical power transmission mechanism (3) by a servo motor (21), and raising the slide (4) by the servo motor (21) when detecting overload on the slide (4) during pressurization.

Abstract: In an overload safety device in a press, having a driving device with a drive shaft, a slide carrying out an oscillating movement and a connecting rod which connects the drive shaft with the slide and has a large and a small eye, the connecting rod is provided with a pressure element disposed displaceably in the longitudinal direction of the connecting rod. The pressure element acts at least indirectly upon a fluid such that, when a certain force acts upon the connecting rod, a pressure increase occurs in the fluid. The fluid is guided to a pressure limiting valve which, when a predetermined pressure is exceeded, causes an interruption of the slide movement.

Abstract: In an overload safety device in a press, having a driving device with a drive shaft, a slide carrying out an oscillating movement and a connecting rod which connects the drive shaft with the slide and has a large and a small eye, the connecting rod is provided with a pressure element disposed displaceably in the longitudinal direction of the connecting rod. The pressure element acts at least indirectly upon a fluid such that, when a certain force acts upon the connecting rod, a pressure increase occurs in the fluid. The fluid is guided to a pressure limiting valve which, when a predetermined pressure is exceeded, causes an interruption of the slide movement.

Abstract: The invention relates to a hydromechanical drive system for at least one press ram of a cutting and/or forming press, at least one drive cylinder being connected to a following kinematic chain. This kinematic chain is designed in such a way that a complete ram stroke, i.e. a downward motion and an upward motion, is effected during a single piston stroke in only one direction. In addition, the proposed drive system has mechanical controlled synchronization.

Abstract: Two hydraulic chambers (3a),(3b) within a slide (2) communicate with an overload protecting valve (12) through relief passages (11a),(11b). Check valves (13a),(13b) and discharge valves (14a),(14b) are arranged in series with each other in the respective relief passages (11a),(11b). When either of the two hydraulic chambers (3a),(3b) has a pressure not less than a set overload pressure, the overload protecting valve (12) opens to relieve pressurized oil within the hydraulic chamber (3a) to an exterior area via a restricting passage (78) of one discharge valve (14a) and the overload protecting valve (12). This switches over the two discharge valves (14a),(14b) to a discharging condition substantially at the same time to communicate the hydraulic chambers (3a),(3b) with a discharge port (R).

Abstract: A pneumatic hydraulic booster pump (5), an overload protecting valve (10) and a pressure compensating valve (14) are connected in parallel with an overload absorbing hydraulic chamber (3) within a slide (2) of a mechanical press (1). The pressure compensating valve (14) has a restricting passage (60) and a relief valve (61) connected to each other in series. The relief valve (61) comprises a valve closing piston (71) which pushes a relief member (72) in a direction for valve closing, a valve closing actuation chamber (73) which communicates with a compressed air supply passage (30) of the booster pump (5), and a compression spring (74) which urges the relief member (72) in the direction for valve closing.