Abstract: A drawing carriage for a drawing machine, comprising two clamping jaws (16) and a clamping jaw moving device for an opening and closing movement of the clamping jaws (16), is characterized in that the clamping jaw moving device comprises a linear motor (4). In the case of a drawing machine, comprising a drive unit for driving at least two drawing carriages (1), the drawing carriages (1) have a linear motor (4) for the clamping jaw moving device.

Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.

Abstract: A drawing machine includes a plate unit, a clamping device, a transmit member, a driving device and a cam. The transmit member includes a following roller. The driving device includes a main linkage inserted through the plate unit and having first and second ends. The cam includes first and second cam paths, with the first cam path disposed between two sides of the second cam path. When the cam is in a first position, the distances between the first cam path and two sides of the second cam path are different. When the cam is in a second position, the distances between the first cam path and two sides of the second cam path are equal. The following roller drives the main linkage to pivot, with the clamping device driven to clamp a rod or pipe. The plate unit is driven by the second cam path and reciprocates along the cam axially.

Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.

Abstract: A drawing machine includes a plate, two series of rollers, two slides and two jaws. The plate defines two looped grooves. The series of rollers can roll in the looped grooves. The slides are movable on the plate. Each of the slides includes an upright side and an inclined edge for sliding on a related one of the series of rollers. Each of the jaws is attached to the upright side of a related one of the slides.

Abstract: A drawing apparatus is assembled from modular units utilizing modular path-forming members and holder modules which can carry the drawing die and drawing carriages shiftable on the guide modules. The drives for the carriages are individual linear motors whose stationary components are the modular path-forming members disposed end-to-end.

Abstract: An apparatus for drawing a strand has a frame extending in a longitudinal direction, a pair of substantially identical linear motors each having a primary fixed on the frame, and a movable secondary slidable along the respective primary in the direction. The primaries extend parallel to the direction and are transversely spaced on a plane extending in the direction. A strand clamp capable of gripping the strand is fixed between the secondaries. Electricity is supplied to the primaries to longitudinally displace the secondaries and clamp in the frame so that the clamp and any strand held by it are advanced longitudinally through the frame.

Abstract: An apparatus for drawing a strand has a frame extending in a longitudinal direction, a pair of substantially identical linear motors each having a primary fixed on the frame, and a movable secondary slidable along the respective primary in the direction. The primaries extend parallel to the direction and are transversely spaced on a plane extending in the direction. A strand clamp capable of gripping the strand is fixed between the secondaries. Electricity is supplied to the primaries to longitudinally displace the secondaries and clamp in the frame so that the clamp and any strand held by it are advanced longitudinally through the frame.

Abstract: Apparatus for feeding and optionally drawing wire to a forging machine or the like. The apparatus is a compact unit that conserves floor space and offers manufacturing economies by permitting the use of common components whether or not the optional drawing feature is selected. Large hydraulic clamping forces for wire drawing operation are developed by a relatively large piston and cylinder that operates mechanically through a relatively small piston and cylinder. The relatively small piston and cylinder enables the apparatus to quickly grip and release wire stock to achieve high machine speeds. When the draw option is not selected, the relatively large piston and cylinder are not supplied, but otherwise most of the same components including the small high speed piston and cylinder are retained to reduce the number of different parts used in the manufacture of the apparatus.

Abstract: A drawing device which may be vertically or horizontally disposed in operation has a single rigid formed or extruded length as a bed. To one end of the bed is affixed a manual winch using a belt for applying tension to the workpiece. The belt is affixed to the upper end of a draw block with a lower end pivoted to two inverted lateral link arms each extending outward with an incline upwards to one distal end of the two straight, non-crossing jaw arms. The tension applied to the draw block is translated by the inverted lateral link arms into force directed outward upon the distal ends of the jaw arms which closes the jaws. The mechanical leverage obtained allows a reduction in overall length and weight of the draw tongs. Between the draw block and a stop bracket to which the jaws are pivoted, a stop bolt extends with a spring about it in compression biasing the jaws shut and facilitating manual loading of the workpiece.

Abstract: Wire drawing apparatus for ease in manually drawing precious metal wire is formed by an elongated base having a forward end portion transversely supporting a draw plate through which wire stock may be drawn and a downturned rearward end portion having a pivotally connected upstanding lever moveable at its upper end portion toward and away from the draw plate by pivoting about a horizontal axis. A wire grip for grasping wire dawn trough the draw plate is attached to the lever by a link chain extending through a keyhole slot in the depending end portion of the lever for edgewise nesting one link of the chain prior to manually moving the lever in a direction opposite the draw plate.

Abstract: A drawing device including a drawing block and a traction device, where the traction device includes two drive belts and an automatic engagement device. This automatic engagement device includes an auxiliary traction device propelled with power by the traction device.

Abstract: A motorized wire-drawing machine for manufacturing precious metal wire. A clasp plate is slidably supported by two support rods extending from the draw plate support block to a motor support block. Mounted parallel to the support rods and passing through a threaded hole in the clasp plate with threads matching the threaded rod is a threaded rod. Thus, when the threaded rod is rotated, the clasp plate moves longitudinally on the support rods and the threaded rod. The threaded rod passes through a hole in the motor support block to a motor drive shaft, connected to the shaft by means of an adjustable shaft that drives the threaded rod under normal resistive load from the wire but slides, disengaging the motor from the threaded rod, during high resistive loads. The clutch is adjustable to accommodate wire of various sizes and materials.

Abstract: Containers of explosive liquids can be prevented from exploding by filling the containers with meshes made from metal foil which occupies a negligible fraction of the volume of the container although it must completely fill the container. In order to refill the containers, the rib mesh (1) must consist of sufficiently small, spherical bodies (24). The invention also deals with the production of these filling bodies (24) from aluminum strip expanded into a mesh. The aluminum strip is first passed through a calibration opening (4) which compacts it into a bar (2) of circular cross-section which is then compacted perpendicularly to its length and continuously transported in the longitudinal direction as it is being squeezed. The front piece of the bar is then detached and pressed in a mould with a hemispherical bottom (21) by a die with the same inner contour to form a spherical filling body.

Abstract: A continuous drawing machine for drawing elongated material through a die has two drawing carriages each with one pair of jaws to grip the wire. The jaws are wedge-shaped and mounted on their rear side in oblique supports. Once in operation they are self-gripping. A linkage system, comprising an arm extending from each carriage and two cam curves on the machine-frame, controls the initial grip of the jaws on the wire. The two cam curves are formed by an oscillating tongue articulated on the machine frame next to the starting position of the carriage. The arm has a follower-roll that follows the first cam curve and thus clamps the wire. During the return of the carriage the tongue with the two cam curves thereon is pushed away by the follower-roll rolling or sliding with its face along the second cam curve. The tongue snaps back by means of a spring as soon as the follower-roll has passed and again offers the first cam curve to the follower-roll after the reversal of the carriage's moving direction.

Abstract: A pull measuring system used in a puller for extrusion profiles being extruded out of an extruder comprises a divided puller head (14) having its parts (30,31) supported for pivoting movement with respect to each other about an axis (32) which extends transversely of the direction of pull. In operation a tie bar (39) fixed to the part (31) carrying the clamping grippers for the extrusion profiles acts in the direction of pull on a force detector (34) fixed to the other part (30) which is arranged at a cantilever (13) of a carriage. In this manner the pull prevailing in operation and being transmitted by the puller to the extrusion profiles can be sensed reliably and accurately under any operating conditions.

Abstract: An axial discharge apparatus for use with a drawbench or an extrusion press includes a plurality of shiftable forks aligned for reception of drawn or extruded stock and a plurality of powered rollers disposed therebelow. The forks receive one or more lengths of drawn or extruded stock subsequent to the completion of forming and, in unison, lower them to the rollers. Rotation of the rollers conveys the formed stock axially out one end of the drawbench.

Abstract: A programmable and self synchronizing wire drawing device includes a stationary sleeve member having a bore. A work cylinder having an end cap piston at each end is axially reciprocable in the bore. The piston diameters equal the diameter of the bore and the cylinder diameter is less than that of the bore so the wall of the bore and the outside of the work cylinder define an annular air space that is closed at its ends by the pistons. An annulus is fixed within the annular space between the pistons. A wire gripper is supported from one piston at a distance therefrom. A hydraulic piston is reciprocable within the work cylinder and it is on a tubular piston rod which extends slideably and sealingly through the end cap pistons. A wire drawing die is mounted on the end of the piston rod which is nearest the gripper. The hydraulic and air driven pistons cooperate to draw wire and feed segments of it to a consuming machine.

Abstract: A drawing-in dog for a wire drawing machine has gripping surfaces formed on two opposed wedge members. Both wedge members are slideably mounted in a housing which tapers towards the aperture through which the wire is to be inserted. One wedge member is coupled by a toggle link to a lever pivoted on the housing, whereby the wedge member may be moved between a released position and a position where it is urged by the lever and toggle link into positive gripping engagement with the wire. The other wedge member is freely slideable so as to enable the dog to accommodate wire of a range of diameters.

Abstract: In a carriage drawing machine for uniformly drawing and longitudinally severing elongated material to be drawn, having two drawing carriages on a carriage bed, a drive shaft disposed parallel to the carriage bed and having two cams revolvable therewith for effecting reciprocating motion of the carriages in mutually opposite directions, a drawing jaw vise on each carriage for alternatingly gripping the material to be drawn, each of the vises having two drawing jaws held in a housing by a wedge structure with bearing rollers interposed which serves to self-lock during the drawing, and an after-connected severing device which is advanceable each time the drawn material is severed, the improvement wherein the two drawing jaws of each vise are disposed on top of one another and, within clamping travel distance, the lower one of the drawing jaws is movable parallel to the direction of drawing and the upper one of the drawing jaws is movable parallel to the wedge structure of the housing.

Abstract: A gripping arrangement for longitudinally advancing elongated workpieces, particularly for use in a drawing bench, a stripping machine and the like, comprises a pair of supports which are mounted on guide rails for movement in paths which are parallel to one another and to the direction of advancement of the workpiece, and co-extensive. Jaw elements are mounted on the supports for movement therewith and for displacement between closed positions in which they engage, and open positions in which they are disengaged from, the workpiece. The gripping arrangement is located downstream of a die and operates in such a manner that always at least one pair of the jaw elements associated with one of the supports engages the workpiece and advances the same in a given direction, thus drawing the workpiece through the die.

Abstract: Apparatus for pulling elongated workpieces and which apparatus includes a pair of reciprocating clamping devices disposed in a side-by-side relationship and movable in towing and return directions. Elongated rotatable drive shafts extending parallel to the pulling and return directions include helical pulling and return drive paths. Drive path followers on each clamping device switch between the pulling drive path and return drive path for reciprocating the clamping devices.

Abstract: In a carriage drawing machine for uniformly drawing elongated material to drawn, having two drawing carriages reciprocatingly displaceable in mutually opposite directions, a drawing jaw vise on each carriage for alternately gripping the material to be drawn, each of the vises having two drawing jaws held in a housing by a wedge structure with bearing rollers interposed which serves to self-lock during the drawing, both of said drawing jaw vises being disposed to receive and simultaneously draw two bars of the material to be drawn, at least one of the two drawing jaws being engageable in common with both of the bars, and including an equalizing support in association with the other of the two drawing jaws.

Abstract: A method of producing cylindrical tubular items by drawing and a draw bench relate to methods and devices for plastic working of materials in a cold state. In the course of manufacturing cylindrical tubular items by drawing, said items are subjected to deformation on being drawn through a die and are imparted simultaneously a torsional moment, said torsional moment being imparted to that portion of each item which emerges from the die, while the item portion found in front of the die is restricted from torsion. The draw bench adapted for realizing the method of the invention comprises a device for drawing items through the die, said device being made as a driven carriage, a means for imparting to the item a torsional moment, said means being arranged on said carriage, and a means for restricting the item from torsion arranged at the die entry.

Abstract: A gripping arrangement for longitudinally advancing elongated workpieces, particularly for use in a drawing bench, a stripping machine and the like, comprises a pair of supports which are mounted on guide rails for movement in paths which are parallel to one another and to the direction of advancement of the workpiece, and coextensive. Jaw elements are mounted on the supports for movement therewith and for displacement between closed positions in which they engage, and open positions in which they are disengaged from, the workpiece. The gripping arrangement is located downstream of a die and operates in such a manner that always at least one pair of jaw elements associated with one of the supports engages the workpiece and advances the same in a given direction, thus drawing the workpiece through the die.

Abstract: Method of controlling with heightened accuracy a processing machine driven t different operating speeds and having a machine part moving through a predetermined full range, the processing machine, at an initial setting of the moving machine part, within a given tolerance range, repeatedly permitting start-up of a processing cycle that has been instituted in advance through a precontrolled time period dependent upon the operating speed and which includes a control commencement build-up time period and a full range displacement time period, which includes interposing a blocking time period between the control commencement build-up time period and the full range displacement time period, the blocking time period always ending at the same position in the displacement range of the moving machine part, blocking the full range displacement by the moving machine part until the end of the blocking time period, and advancing the start of the control commencement build-up time period in accordance with the blocking time