Abstract: A device for fastening an article, disposed at an end of a cylindrical shaft, portion, to one coupling member of a coupling means whose other coupling member is anchored at a machine tool, especially a die sinking electric discharge machine. One coupling member includes a bore to receive the shaft portion. An intermediate piece consisting of a shaft portion and a fixing portion is made in one-piece, preferably by an aluminum casting process. The fixing portion is adapted for engagement with an interlocking means disposed at the wall of a take-up sleeve of the coupling member. Likewise provided is a one-piece bushing to take up a shank of an article the outer surface of the bushing at least in part being in engagement with the inner surface of the hollow end remote from the coupling member of the cylindrical shaft.

Abstract: A method for making a first object (1) which can be fixed with great precision with respect to a second object (2) comprises the steps of pressure-casting the first object from a plastically deformable, relatively soft metal such as light metals and zinc alloys, sizing the first object (1) at least in the area of desired surfaces (12, 13, 14) of contact between the first object (1) and the second object (2) by pressing the first object (1) into a sizing tool which consists of a hard material and has in the area of the contact surfaces (12 to 14) a negative form with respect to the desired form of the first object (1), the first object (1) undergoing a plastic deformation at least in the area of the contact surfaces (12 to 14). The additional step is performed of applying a relatively hard metal surface coating to the first object (1) at least in the area of the contact surfaces (12 to 14) (FIG. 1 ).

Abstract: A device for holding an object in a spatial position containing a pallet-presetting structure on which a pallet is located. This pallet is held on the presetting structure. The presetting structure contains a base plate, a second plate setting on top of the latter, and a third plate. The second plate is connected both to the base plate and to the upper plate by hinges. The respective hinge pair each has an axis which is at right angles to the other. In this way, the plates can be swung open to define a right angle to one another. A vertical measuring column is also provided. By this device, a point of an object can be exactly measured or set in a horizontal position by the vertical measuring column.

Abstract: A coupling device for coupling, for example a shaft of a tool, to a coupling member anchored to a machine tool, comprises a take-up bushing formed with a conical recess receiving a substantially conical tapered sleeve which receives the shaft and is formed by at least two portions lying at two opposite sides relative to a central axis of the tapered sleeve. The sleeve is pressed into the bushing to retain the shaft in the coupling device.

Abstract: The device for reproducible coupling of two objects, specifically of a workpiece (WS) or a tool with a machine tool, attaches the workpiece (WS) or the tool for precise positioning to one of two coupling parts (1,2) in a position precisely defined in reference to a reference system of all machine tools through which the workpiece must travel. The attachment surface of one coupling P(2) has rigid profile pieces (4,1). These can be engaged with the attachment surface of the other coupling part (1) without relative motion of the two coupling parts (1,2), with the help of an appropriate number of suitable and at least partly elastically deformable transfer elements (3,3') for power transmission. The elastically deformable transfer elements (3,3') are integral parts of the latter coupling part (1) (FIGS. 1 and 2).

Abstract: Device for the precise determination of the position of an electric discharge wire (18) in an electric discharge machining unit as a basis for the setting, control or readjustment of the electric discharge wire position with a view to a work piece machining process, with at least one contact-tracer element (24; 26; 38; 44; 46) which by means of a machining table movement is displaceable in contact with the electric discharge wire (18), whereby there is provided a tracer unit (2) equipped with at least one tracer element (24; 26; 38; 44; 46) which tracer unit with a defined position relative to a work piece (6) is attached to the work piece in a separable manner.

Abstract: A device for holding and handling a flat object, which can be a work piece to be machined or a tool for the same purpose, comprises a fixed clamp and a movable clamp which clamp the object therebetween. The device further includes a closed, rectangular, flat frame, whose one side is designed as the fixed clamp. The movable clamp can be introduced from outside into the frame and moved between the guides in the same. The movable clamp is provided with an arrangement for its fastening in the frame and is clampable against the flat object. On the side opposite to the fixed clamp of the frame there is provided at least one clamping device acting upon the movable clamp. The device allows clamping without a play and stack of the flat object. It is especially suited for precision machining in one or several successive machining operations, the pre-set machining position of the object being preserved during processing.

Abstract: An apparatus for holding an object in a desired location in space having a beam, the upper edge of which having channels. A lamellar component is present on this beam. The lower and upper sides of the component are each provided with a recess. The lateral faces of the lower recess are in engagement with the channels of the beam. The lateral faces of the upper recess engage into channels that are constructed in an angular carriage. A vise for gripping an object, for example, is present at one end of this carriage. The apparatus may be used on machine tools for retaining objects to be machined. In particular these may be machine tools on which the object is treated by electroerosion.

Abstract: A retaining member which bridges the interface in a workpiece being machined is described. The retaining members are designed as a bridge, it being possible for one end portion of this bridge to be fixed on the waste piece (11) and the other end portion of this bridge to be fixed on the remaining piece. The respective retaining members may be connected to the workpiece parts utilizing magnetic force or a partial vacuum, by soldering, adhesion, hard soldering, welding, screwing, riveting, clamping or by using double-sided adhesive tape. With the aid of such an apparatus, the parts of a workpiece to be separated from each other may be held in their original position long enough for the cutting operation to be completed.

Abstract: A device for straightening the wire of a wire electroerosion machine includes a straightening block that is displaceably arranged on a beam and that can be fixed to the clamping table of a machine tool. The block has a through-opening, and a corner portion of the block is missing. In the vicinity of the side walls of the remainder of the block, an electrically contacting means is provided under each side wall. The longitudinal axes of the contacting means are at right angles to one another and are located in the same horizontal plane. The particular contacting means contains a bolt, which is located in a bore running roughly at right angles to the central bore in the block. At the end of the bolt located in the central bore is eccentrically provided a contact element having a cylindrical surface. The eroding wire can be brought into contact with the surface of the contact elements of the two contacting means.

Abstract: The device comprises a guiding piece (1), the upper part of which is of profiled construction. The two lateral surfaces (14, 15) of the beam-shaped guiding piece (1) are provided in the region of its top corner parts with channels (17, 18). A guided piece (2), in the underside of which a groove (25) is executed, is positioned on the guiding piece (1). One of the lateral walls (30) of this groove (25) is undercut and is in engagement with the flank (19) of one of the channels (17) of the beam (1). The opposite lateral wall (32) of the groove (25) stands approximately at right angles to the bottom (33) of the groove (25). A cavity, in which a pawl (4) is located, is executed in this portion of the guided piece (2). This pawl (4) is connected by means of a screw (6) to the guided piece (2), a nose (35) of the pawl (4) engaging the other channel (18) of the beam (1). In such a device, the guided piece can be placed upon the guiding piece at any point of the latter.