Abstract: In a working method using a device for operating presses comprising a ram and a die, such as forming presses or cutting presses, for example multiple-die presses for large workpieces, transfer presses, multi-ram transfer presses, such forming presses or cutting presses also being arranged in press lines, smaller ram strokes result in optimized freedom of motion of the press, in place of the existing large freedom of motion, the acceleration and speed of the ram are at most maintained, or reduced, while parts output is increased, and smaller paths are made possible due to dynamic ram stroke and transfer movements. To this end, the work process of the ram stroke of presses is controlled according to a curve that follows the function f(x)=a(0)/2+a(1)*cos(1*x)+ . . . +.

Abstract: A transporting apparatus, in particular a 3-way transfer means, for transfer presses, in the case of which, for horizontal movement, linear drives are attached and actuated such that, along with a compact construction, the linear drives allow the gripper rails to be changed straightforwardly during tool-changing operations.

Abstract: A preshaping method for massive forming processes is proposed in which a fixed blank is deformed by at least one roll moving continuously forward along a predetermined contour.

Abstract: A transporting apparatus, in particular a 3-way transfer means, for transfer presses, in the case of which, for horizontal movement, linear drives are attached and actuated such that, along with a compact construction, the linear drives allow the gripper rails to be changed straightforwardly during tool-changing operations.

Abstract: A preshaping method for massive forming processes is proposed in which a fixed blank is deformed by at least one roll moving continuously forward along a predetermined contour.

Abstract: A transport system provided in particular for large-component transfer presses is distinguished by a design with a low width and, nevertheless, permits large transport steps. By controlling two drives in the direction of rotation in relation to each other, all desired travel curves in one plane can be realized. As a result of the simple construction, a cost-effective solution is achieved for a highly dynamic transport system.

Abstract: An articulated-arm transport system, provided in particular for the automation of press lines and large-component transfer presses, is distinguished by a design which permits components or workpieces to be inserted or removed even when there is a small clearance between an upper and lower tool.

Abstract: A forming press for external high-pressure forming is proposed, in which the fluid box (10) is arranged stationarily. Working cylinders (6) are integrated in the ram (2) so as to achieve a compact design, and the sheetholding and closing force is applied by short-stroke cylinders (7).

Abstract: The invention relates to a process for controlling casting parameters and in particular to the control of the metering of the molten metal in a casting chamber of a vacuum die-casting machine. Measurement devices connected to a computer determine the volume and condition of the molten material. An evacuation device and a vacuum valve are controlled in the form of a control circuit.

Abstract: A casting chamber has a casting plunger guided therein. In order to supply the casting plunger with lubricant on its outer circumferential surface, the casting chamber has a lubricant channel which runs round in a ring and is supplied via a feed line with lubricant which, after flowing through the lubricant channel, passes into a discharge line for the lubricant.

Abstract: A computer implemented method for determining optimized parameter values for a casting process for use with a diecasting machine, including: storing a plurality of known data sets of individual parameters of a casting cycle for a casting process for an optimization program in a die data memory of a die-casting machine control system; transferring automatically each data set of the plurality of known data sets in succession to the die-casting machine control from the die data memory by means of the optimization program, without external manual intervention, and running a preselected number of casting test cycles with each successive data set; testing sample products produced with one data set in the casting test cycles for quality by metallurgical means to provide at least one measured value; assessing quality of the sample products produced with one data set in the casting test cycles employing an automatic quality control operation to identify optimum parameter data sets from the at least one measured value;

Abstract: In a die-casting machine for producing castings from metals or metal alloys, which castings have a low content of gas, pores and oxides, melt is drawn by means of a vacuum out of a holding device (10) via a suction tube (11) into a casting chamber (3). A casting plunger (7) closes the inlet opening (16) to the casting chamber (3). In order to achieve as low as possible mechanical surface pressure due to flow of the melt, and fluviatile erosion of the die-side end of the inlet opening (16), and thus avoid high wear of this inlet edge or of the casting chamber with casting plunger, a planar or linear inlet cross-section (24, 27) as well as a curved deflection surface (20) on the casting plunger (7) are provided.

Abstract: The invention relates to a method of damping the pressure peak occurring at the end of the die filling phase in die casting machines, with a hydraulic damping device being disposed between the piston rod of the drive piston and the piston rod of the casting piston. The damping chamber of the damping device is closed by a control piston through which no fluid flows in the case of damping and which is not required to move against the direction of movement of the casting piston rod in order to open the control edge. It is here the object of the invention to shorten to a minimum the response time of the control piston. According to the invention, a device is proposed for this purpose which is characterized in that the chamber (25) disposed on the side opposite the reservoir chamber (10) of the control piston (4) is connected to a pressure medium conduit (26) in which a control valve (27) is disposed.

Abstract: A multi-stage press includes support columns; a press stage including tools for deforming a workpiece; an empty stage adjoining the press stage in a direction of a length dimension of the multi-stage press and being situated in a zone of the support columns; a gripper rail being formed of a first gripper rail lenth portion situated in the press stage and a second gripper rail length portion situated in the empty stage; a plurality of workpiece gripper assemblies mounted on the gripper rail; and a tool table normally situated in the press stage and being removable therefrom in a direction transversely to the press length. The workpiece gripper assemblies are independently shiftable relative to one another along the gripper rail and the gripper rail assemblies normally supported on the second gripper rail length portion are shiftable onto the first gripper rail length portion.

Abstract: A die casting process for making castings by means of a horizontally oriented cold-chamber die casting machine comprises the steps of advancing a casting piston in the casting chamber from a starting position for ejecting the molten metal dosage from the casting chamber; and withdrawing the casting piston into the starting position. The withdrawing step includes the step of passing over metal residues adhering to walls of the casting chamber. Subsequent to the withdrawing step and prior to the charging step of a successive cycle, the casting piston is advanced in the casting chamber void of molten metal dosage for ejecting the metal residues by the casting piston from the charging chamber and returning the casting piston into its starting position.

Abstract: A releasable coupling for connecting a first and a second component to one another, includes a first sleeve-like hollow member affixed to an end of the first component and a second sleeve-like hollow member affixed to an end of the second component, an expander mandrel supported in the first hollow member and arranged for an axial motion with respect to the first hollow member to assume an advanced position in which it projects into the second hollow member to be surrounded simultaneously by the first and second hollow members. The expander mandrel includes an expander element and pressing elements operatively connected to the expander element for displacement generally radially outwardly by the expander element into an expanded position for a simultaneous engagement with the first and second hollow elements thereby clamping the first and second components to one another.

Abstract: A transfer press for a stepwise deformation of workpieces includes a plurality of stages arranged in a series and an arrangement for intermittently advancing the workpieces from one stage to a successive stage. Some of the stages are work stages for deforming the workpieces by workpiece-deforming tools and at least one of the stages is an empty stage void of tools. There is further provided a workpiece-supporting arrangement situated in the empty stage for supporting a workpiece while the workpiece dwells in the empty stage and a tool-supporting table normally situated in a work stage in a working position adjacent the empty stage and being displaceable for effecting tool replacement thereon.

Abstract: For the exchange of tools in a press, the tools, including their associated gripper rail sections, are moved out of the press on a sliding table having a gripper rail support. To ensure that the gripper rails do not block access to the tool, the gripper rail support is adjustable in height. This permits lowering of the gripper rails sections to the extent that access to the tool is unimpeded.

Abstract: The present invention relates to a parts depository particularly for large-area workpieces processed in a transfer press handling large workpieces, with the tool free stage disposed between the machine columns being designed as a so-called empty stage for the deposit of the workpiece parts.To avoid the manual work previously required to adapt the parts depository to the new workpiece when changing from one workpiece type to another and to make the change as fast and automatic as possible, the present invention proposes to arrange a plurality of supporting elements in the empty stage so as to serve as support for the workpiece part, with the supporting elements being adjustable and settable in height.