Abstract: A drawing apparatus in drawing stages of a press, having a pressure cheek divided into segments, to the corner areas of which pressure cylinders are applied. The pressure cylinders are fixed to the press. Their piston rods, by way of pressure rods, act upon a liftable and lowerable console. At least one locking cylinder which is fixed to the frame is provided which, by way of a lift bridge, is applied to the console and, corresponding to the pressure which acts upon it, prevents an upward movement of the console and thus of the pressure cheek. The point in time of the stop stage in the upward-moving stage can be determined by the valve control of the pressure in the locking cylinders.

Abstract: A device for ejecting a workpiece from a die having a two-armed ejector lever, the drive-side arm of which can be driven by driving rods. The ejector-side arm acts upon an ejector slide. The ejector lever is adjustable for changing the ejector lift. In order to integrate the compensation for different ejection lengths into the ejector lever, the working plane on the drive side and the take-off plane on the ejector side are to be arranged in parallel to the adjustability of the ejector lever. On the other hand, the ejector lever must have a different width in the area between the take-off plane and the bearing which supports the ejector lever during the forming, for projections of different lengths at the workpieces. The width is obtained from the distance of the take-off plane in ejector position of the ejector lever from the bearing minus the length of the ejector lift in this position.

Abstract: In the case of a drive for a male-die-side ejector slidably disposed in a slide of a mechanical metal-forming press having an angle lever which is pivotably disposed at the slide, one leg of the lever acting upon the end of the ejector facing way from the male die and the other leg thereof being acted upon by a control cam which is driven in a timed manner and being held in contact with this control cam, a free adjustability of the moving characteristics of the ejector is achieved in that the control cam is provided at a control carriage which is slidable in a guide fixed at the frame in parallel to the moving direction of the slide, and at which a control connecting rod is applied in a bearing, this control connecting rod, at one end, being disposed eccentrically on a shaft serving also as the drive of the slide.

Abstract: An intermediate depositing station between machining stages of a metal forming machine, having templates for supporting a sheet metal part from below which are adjustable in height, distance and oblique position relative to another sheet metal part. The intermediate depositing station has a mounting plate that is displaceable in a first horizontal direction with respect to a foundation. A first adjusting device is coupled to the mounting plate and is operable to displace the mounting plate horizontally. A carriage plate is coupled to the mounting plate and is displaceable in a second horizontal direction that is transverse to the first horizontal direction. A second adjusting device is coupled to the carriage plate and is operable to displace the carriage plate horizontally. A console is coupled vertically on the carriage plate. A third adjusting device is coupled to the console and is operable to lift and lower the console.

Abstract: A drive for a male-mold-site ejector slidably disposed in a slide of a mechanical metal-forming press has an angle lever pivoted in the slide. One leg of the angle lever act upon the end of the ejector facing away from the male mold and the other leg of the angle lever is in driving connection with a guide rod which is linked to a driving connecting rod for the slide. In a timed manner, the guide rod transmits driving movements to the angle lever. The driving connection is constructed as a link chain, in which the guide rod linked to the driving connecting rod is disposed approximately at a right angle to the moving direction of the slide and the arm of a two-armed lever linked to it extends approximately in parallel to the moving direction of the slide.

Abstract: A hybrid press installation employs a plurality of individual presses including a drawing press and transfer presses. These presses, by means of frames, are set up on common installation surfaces. A tool is assigned to each press which includes a head piece, a slide and a press bed and a sliding table. The tools can be exchanged by means of the sliding tables. A transfer device extends through the hydrid press installation, the components of this transfer device being arranged above the sheet metal conveying plane, and gripping the sheet metal parts from above. Intermediate depositing devices are positioned between two working stages. As a result, a reduction of the length of the transfer movement of the sheet metal parts per slide stroke is achieved. In this manner, large-surface and/or thin-walled and therefore unstable sheet metal parts can be transferred.

Abstract: A transfer device permits different moving sequences of holding devices for the sheet metal parts which are to be moved through the metal-forming machine. The holding devices are fastened to carriages. The carriages are cam-guided, in which case a first carriage carries out a transfer movement from a working stage to an idle stage while taking along a sheet metal part. The return movement is interrupted in an intermediate position during the deforming operation of the sheet metal parts. A second Carriage carries out a transfer movement from the idle stage to a working stage and a return movement which is temporarily interrupted in an intermediate stage. The vertically extending motional parts of curves are used for the picking-up and depositing of sheet metal parts in working stages; the extended lowering movement is used for the depositing of the holding devices on sliding tables which can be moved into the press.

Abstract: A transfer device permits different moving sequences of holding devices for sheet metal parts which are to be moved through a metal-forming machine. The holding devices are fastened to carriages. The carriages are cam-guided, in which case carriage carries out a transfer movement from a working stage to an idle stage while taking along a sheet metal part. The return movement is interrupted in an intermediate position during the deforming operation of the sheet metal parts. The carriage carries out a transfer movement from the idle stage to a working stage and a return movement which is temporarily interrupted in an intermediate stage. As a result of the low-mass construction of carriages, high accelerations are possible in the movements. The transfer movements are shortened significantly by the use of intermediate depositing devices in the idle stages.

Abstract: To facilitate a mounting of end areas of gripper rails having exchangeable parts, in a transfer press during a set up change, elements for coupling and uncoupling the exchangeable gripper rail parts are integrated into a constructional unit. This constructional unit includes separatable housing components in which an adjusting device is arranged in one of the housing components which has a slidable clamp bolt. The clamp bolt can be clamped behind a clamping surface in the other housing component. Guided along with the clamp bolt are centering bolts for aligning of the gripper rail parts with respect to one another and a guide bolt for the moving of a carriage located outside the constructional unit.

Abstract: In a transfer press, the gripper rails consist of gripper rail parts located at the press and exchangeable gripper rail parts. In operation, the gripper rail parts must be rigidly connected with one another. For this purpose, a coupling element utilizing a rotary tightening device is inserted in one gripper rail part and has a tension rod which can be braced with T-shaped head behind a coupling surface of a gripper rail part located at the side of the press. Flange facings are machined into front faces of the gripper rail parts. These flange facings have flat surfaces which extend parallel to the direction of the lifting and lowering movement of gripper rail parts and the direction of the opening and closing positioning movement of a sliding table carrying exchangeable gripper rail part. The gripper rail parts are separated along the flat end surfaces of the flange facings and do not require longitudinal displacement to provide a separation gap.

Abstract: A drawing installation for a press which has to produce the holding force for the counter-holding during the drawing. The drawing ram displaces the sheet metal part and the sheet metal holder against the holding force to be produced by the drawing installation and must additionally overcome the inertia forces which occur as a result of the acceleration of the parts of the drawing installation at the beginning of the deformation of the sheet metal part. In order to avoid the forces which occur thereby impact-like, the piston rod transmitting the holding force is pre-accelerated in the drawing direction prior to the contact of the drawing ram on the sheet metal holder. The piston rod has an operating surface adapted to be acted upon in the drawing direction. The pressure space coordinated to the operating surface is adapted to be connected with a pressure quantity space of a pre-acceleration cylinder and with a reservoir by way of a follow-up control.

Abstract: During a tool change, the template is to be moved dimensionally accurately into the idling stage of a transfer press and out of the same on support elements at the sliding table in the tool space of the transfer press. This requires a dimensionally accurate coupling. A gripping and holding device is provided in the idling stage for the insertion and retraction of a mounting bolt into a, respectively, out of a mounting bushing. The mounting bushing is thereby rotatably supported at the template and forms, on the one hand, a first bayonet-like connection by means of the mounting bolt, a guide groove machined into the same and a cylindrical pin engaging into this guide groove and, on the other, a second bayonet-like connection by means of a retaining plate, a cylindrical pin provided in the same and a mounting groove machined into the mounting bushing. These connections operate one after the other by rotation of the mounting bolt by means of an adjusting means.

Abstract: An installation for sorting out reject slugs out of the slug channel of an automatic coining machine with a slug control mechanism, whereby the reduction of the reaction time for the rejection of slugs to be sorted out permits a considerable increase of the number of coining strokes of the automatic coining machine, without the need for a further additional intermediate storage of slugs. The reject channel for rejected slugs is thereby kept closed by shaped members in the manner of shutters and is opened up in case of need whereby also the desired dimensions for the slugs are determined by the shaped members. Such a slug control mechanism is needed in the slug channel of an automatic coining machine in order to separate good slugs from reject slugs.

Abstract: A drawing apparatus in a press for holding the sheet metal part during the drawing and for the ejection thereof. Additionally, blocking devices are provided which prevent the ejection of the sheet metal draw part at the same time with the upward movement of the press ram. Each blocking device is thereby to be rendered selectively operable or inoperable. A continuous flow of the hydraulic liquid is to be precluded during the inoperative condition of the blocking device. The blocking device consists of a pressure cylinder, of a pressure piston which is displaceably movable on the piston rod displaceable by the draw cushion, and of a compression spring for the displacement of the pressure piston in the ejection direction. The pressure space formed above the pressure piston is selectively pressureless for the inoperative condition, respectively, adapted to be acted upon with controlled pressure for the operative condition of the blocking device.

Abstract: For coupling and decoupling gripper rail parts in a transfer press, clamping means with a clamping bolt movable in its axial direction and rotatable about the same are arranged in the end parts. The clamping bolt engages with a clamping anchor behind a clamping surface in the end part to be coupled. Centering means for the mutual alignment of the gripper rail parts and of coupling device for the lines taken along at the gripper rail parts are movable along with the clamping bolt. The closing of the coupling devices in the line leading to the clamping means takes place sequentially. The movements of the clamping bolts after the closing of the coupling devices can take place at the same time.

Abstract: A drawing installation for a press which must produce the holding force during the drawing operation. The drawing ram displaces the sheet metal part and the sheet metal holder against the holding force and additionally must overcome at the beginning of the sheet metal deformation the inertia forces of the accelerated parts of the drawing installation. In order to avoid the forces which occur thereby in an impact-like manner, the piston rods transmitting the holding force and the ejector piston rods are pre-accelerated prior to the drawing ram. The piston rods each include an operating surface adapted to be acted upon in the drawing direction. The pressure spaces coordinated thereto are connected with a pressure quantity space each of a pre-acceleration cylinder and by way of a refill control with a pressure source. The control of the pre-acceleration cylinder and of the refill from the pressure source takes place in dependence on the movement of the drawing ram.

Abstract: An arrangement for the stepwise feed of band material which includes a first, locally fixed and driven feed roller and a second feed roller rotatably supported on a rocker; a lifting mechanism is provided, by which the second feed roller is movable at the point in time of the reversal of the direction of rotatin toward the first feed roller for an advance of the band material and away from the same into a return position in which the band material is to be held fixed. The feed arrangement is designed for an intermediate clearing of the second feed roller and of the guide member by abutment of the guide element on a height-adjustable eccentric and for different thick band materials. In the points of reversal of to and fro movements, the second feed roller as also the pressure device are briefly pressed against the band material.

Abstract: An arrangement for a press with an eccentric shaft used for the adjustment of the stroke of the ram of the press by adjusting the relative eccentricity of an eccentric and of an eccentric bushing supported thereon, which in turn adjusts the connecting rod of the ram. The eccentric bushing is selectively releasable and fixable in the direction of rotation on the eccentric by actuating means, whereby the released eccentric bushing is fixed with respect to a non-rotating part of the press and with the eccentric shaft and is rotatable in this fixed condition for purposes of adjusting the ram stroke. The fixing of the eccentric bushing on the eccentric occurs steplessly and positively by supporting the eccentric bushing on an oversize eccentric in a press-fit connection having cylindrical fitting surfaces established between the bushing and eccentric and wherein the press-fit connection is releasasble by supplying pressure oil by way of at least one groove to at least one fitting surface.

Abstract: An arrangement for the transport of workpieces in a multi-stage deformation press in which the workpieces are to be seized by gripping tongs and are to be transferred in the deformation stages. The gripping tong consists essentially of a base body which is displaced in the direction of a deflection movement by way of a coupling rod. The base body carries a pivot support in which the gripping arms are rotatably supported in pivot joints. The areas of the gripping arms remote from the workpiece are pivotally connected at the base body by way of a coupling member. Within the area of the pivotal connection, the gripping arms carry rollers which are placed from the outside against curved regions of a cam plate by way of a compression spring between the base body and the pivot support. One cam region is on the shape of a circular arc about the pivot bearing so that a larger closing and opening movement is imposed on the gripping arms.

Abstract: An arrangement for the feeding of sheet-metal blanks to a first machine stage is provided. A drawing stage of a transfer press is provided which has a conveying device for taking sheet-metal blanks from a supply pile and depositing them in an intermediate depositing stage adjacent the supply pile. The conveying means takes the sheet-metal blanks from the intermediate depositing stage to a first machining stage adjacent the intermediate depositing stage. Transfer rails are provided which can be driven in transfer direction, in lifting in lowering direction and in closing and opening direction. Gripping devices are attached to the transfer rails for the transport of the workpieces between the machining stages.