摘要:
A die cushion device (10) of a press machine includes a hydraulic cylinder (3) that supports a cushion pad (2) and generates die cushion force when a slide of the press machine descends, an orifice (52) and a hydraulic pump/motor (4) that are connected to each other in in parallel between a lower chamber (3c) of the hydraulic cylinder (3) and a tank (9), a servo motor (5) connected to a rotating shaft of the hydraulic pump/motor (4), and a control unit that controls torque of the servo motor (5) to control the die cushion force, wherein a rotation direction of the servo motor (5) switches from a first rotation direction in which the hydraulic pump/motor (4) serves as a hydraulic motor to a second rotation direction in which the hydraulic pump/motor (4) serves as a hydraulic pump, during generation of the die cushion force.
摘要:
A die cushion device (200) of a press machine (100) includes: a plurality of cushion pads (210-1 to 210-N); a plurality of die cushion force generators (220-1 to 220-N) that supports the plurality of respective cushion pads (210-1 to 210-N), and that is capable of independently moving up and down the plurality of respective cushion pads (210-1 to 210-N) as well as independently generating die cushion force for each of the cushion pads; and a die cushion controller (300-1 to 300-N) that controls the plurality of die cushion force generators (220-1 to 220-N) to independently move up and down the plurality of respective cushion pads (210-1 to 210-N) as well as to independently generate die cushion force for each of the cushion pads (210-1 to 210-N).
摘要:
Stelleinrichtung für ein Blechumformwerkzeug und Blechumformwerkzeug mit einer Stelleinrichtung (10), welche ein Stellglied (15), das verstellbar ist, um eine Höhenabmessung (H1, H2) der Stelleinrichtung zu verändern und dadurch eine gewährleistbare Distanz zwischen einem Blechhalter und einem Gegenblechhalter des Umformwerkzeugs zu verstellen, eine Antriebseinheit (20), die mit dem Stellglied antriebsverbunden ist, einen Sensor (30), der eingerichtet ist, eine physikalische Größe zu erfassen, aus welcher eine blechhalterseitig auf die Stelleinrichtung wirkende Druckkraft herleitbar ist, und eine Regelvorrichtung (40) aufweist, die mit der Antriebseinheit und dem Sensor verbunden und eingerichtet ist, aus der erfassten physikalischen Größe die wirkende Druckkraft zu bestimmen, auf Basis der Druckkraft eine Istdruckkraft zu bestimmen und diese mit einer Solldruckkraft zu vergleichen, um eine Differenz zu ermitteln, auf Basis der Differenz ein Stellsignal zum Ausgleichen der Differenz zu erzeugen und die Antriebseinheit mit dem Stellsignal zum Verstellen des Stellgliedes anzusteuern. Gemäß der Erfindung ist die Regelvorrichtung eingerichtet, um ausschließlich das Stellsignal für die eine Antriebseinheit zu erzeugen.
摘要:
The die cushion force setting apparatus according to an aspect of the present invention allows die cushion forces (component forces) acting on plural driving shafts (4a) to be set easily, makes it easy to apply strong or weak die cushion forces to a complex-shaped drawn part in a plane of a cushion pad (2), and provides a smooth die cushion force distribution. An operator manually enters (step S18A) a total die cushion force, axial component force of a left front hydraulic cylinder (4LF), and center-of-force position by operating an input device (A1). Based on the information entered via the input device (A1), the numerical computing device B1 calculates (step S18B) axial component forces of three hydraulic cylinders (4LB, 4RF, 4RB) through numerical computations. The one axial component force thus entered and three axial component forces thus computed numerically are set (step S18C) as the axial component forces of four hydraulic cylinders (4LF, 4LB, 4RF, 4RB).
摘要:
A condition setting calculation device (104) compares an actual performance value of a material characteristic transmitted from a material characteristic data providing device (101) via a network (105) with a standard value, and corrects forming conditions such as a forming speed and a blank-holder pressure in accordance with the compared result. A control device (103) controls a press-forming device (102) to start a press-process of a material to be processed (300) with the corrected forming condition. Accordingly, it becomes possible to reduce occurrences of cracks and wrinkles as much as possible when the material to be processed (300) is press-processed, and to obtain good products of substantially identical shape.
摘要:
The invention relates to a method and an arrangement in a press tool for reducing the relative speed at which a moveable sheet metal holder impacts against a press upper part for transmitting a working force or is separated therefrom on completion of pressing. The invention is characterised in that the force for acceleration of the sheet metal holder is transmitted from the press upper part by way of a mechanical transmission device fitted to the sheet metal holder in such a way that an initial movement is imparted to the holder before the press upper part comes to bear against the sheet metal fabrication and sheet metal holder, and that only then does the press uper part impact against sheet metal fabrication and sheet metal holder and for depression of gas-filled springs arranged adjacent to and supporting the sheet metal holder.
摘要:
Method and apparatus applicable to a press (10, 150) using a die set (12, 18, 30, 152, 156, 162) including a lower and an upper die which are removably installed movably towards and away from each other to perform a pressing operation on a blank under the adjusted operating conditions. A memory (130, 310, 322) is provided to store machine information relating to the press and necessary to determine optimum values for the operating conditions. Die set information relating to the die set and necessary to determine the optimum values are received through a data input device. A calculating device (90, 296, 302) calculates the optimum values, based on the machine information and the die set information, and an adjusting device (90, 296, 302, 34, 36, 38, 46, 50, 60, 61, 84, 86, 174, 178, 236, 238, 212a, 212b, 214a, 214b, 242, 246, 270, 272) automatically adjusts the operating conditions according to the calculated optimum values.