Abstract: This disclosure pertains to a method and device for changing a die ring to and from a die in an indirect extrusion press. Once the die-die ring assembly is exposed from the container of the press, the changing device consisting of a rotating arm having opposed relatively movable jaws is caused to engage the die ring and remove it from the extrusion axis of the press, and after treatment, if necessary, to return it to the extrusion axis and place it on the die.In the operation of indirect extrusion presses it has been the normal practice to employ a composite die assembly consisting of a die and outer encircling die ring. After completion of the extrusion operation the die ring is removed from the back of the container and either the same die ring or a second one is placed back on the die after the die or the container has been moved to position the die at the front of the container.

Abstract: A far less expensive process of manufacturing heavy-duty welding necks, nozzles, and similar connector elements comprising cylindrical bodies with a radial flange at one end, is provided through the utilization of a centered metal-displacement disc which contacts a radially flanged heated billet after the forging operation and forces the metal under the centered disc and interiorly of the radially-flanged portion into the die cavity and around a rounded centrally disposed supporting member which initially is in contact with the underside of the work-piece. This forward displacement action is continued until the advance portion of the work-piece contacts a circular forging knife which is carried on the interior of the female forging die member.

Abstract: Apparatus for repairing and straightening is disclosed in its preferred form for use in repairing and straightening the body and frame of a vehicle. The preferred apparatus includes a tread member including left and right track members for supporting a vehicle thereon, a tram member movable along and between the right and left track members and including two elongatable pull towers pivotally mounted thereto, and an additional elongatable pull tower mounted adjacent an end of the apparatus. A flexible connector, preferably a chain, is arranged for connection between the pull towers and the vehicle. The track members further include regularly shaped apertures which vertically pass therethrough. Locking pins are also provided which extend through an aperture of the track members and abut with a portion of the pull towers to lock the pull towers at any desired angle to the tread member.

Abstract: A pull clamp is provided for attaching to sheet metal flanges for transmission of pulling forces to the sheet metal, particularly in collision repair operations. The clamp comprises a pair of opposed clamping jaws adapted to be tightened against each other by bolts and have at one end opposite clamping surfaces for engagement with the sheet metal flange, the jaws furthermore enclosing a connecting member for coupling to a pulling means, said member including a conical wedge element for exerting a spreading-apart action of the inner surfaces of the jaws and hence through the bolts increase the clamping force between the clamping surfaces of the jaws in proportion to the pull of the pulling means.

Abstract: A die holder has adjacent to its front end an annular step portion comprising a steep wall and a gradual wall tapered from the steep wall to the front end, the annular step portion being adapted to provide an annular space between the step portion and an inner surface bounding a billet receiving bore in a container when the die holder is inserted in the bore. During indirect extrusion, foreign impurities such as dirt, lubricant, metal oxides, and the like deposited between the bore surface and the billet are trapped and collected in the annular space against entrainment into an extruded product being formed. An annular ring partly defining the steep wall acts as a barrier that prevents the impurities from getting therepast and minimizes skull formation on the bore surface. An annular butt formed by accumulations of the impurities in the annular space and a butt end of the billet are removed from the container by means of a shear.

Abstract: A filter that is used to remove dust or other particulate matter from a carrier gas being directed therethrough. The filter comprises a cylindrical bag supported on a skeletal cage that may be shipped in an unassembled form and expanded to final configuration only when prepared for use. The arrangement permits shipping and storing the filter bag in a "knock-down" form that occupies but a small fraction of its final volume, while it may be readily assembled and held permanently rigid by an integral tension spring.

Abstract: Acccessories are disclosed, in their preferred forms, for use in conjunction with an apparatus for repairing and straightening vehicles having a support surface, for supporting vehicles thereon, including an array of regularly shaped apertures which extend vertically therethrough. A unibody clamp is disclosed including adjustable jaws for removably gripping the pinch weld of a unibody frame. Abutment wings are further provided on the clamp for abutting with a stop member which accepts, substantially in line, the counterforce from the clamp. A first connector member is further provided on the clamp for attaching a chain held in an elevated position by an elevated chain apparatus. First connector member further allows the use of a down pull member including a chain directed to the clamp by a rotatably mounted pulley. A second connector member is further provided on the clamp allowing the exertion of a force perpendicular to the pinch weld of the unibody frame.

Abstract: A heavy duty truck liner for working on a truck, or large trailer, where a plurality of pulling and pushing operations are required to straighten a frame, etc. A plurality of tracks in the form of a rectangle surrounding the normal position of the truck and body, is prepared and set into the concrete floor of the work room. A large inverted U-frame is set on rollers which are adapted to travel longitudinally along the long sides of the track. The frame is large enough to completely encircle the truck and body can be moved readily along the track so as to be opposite any point on the side walls of the body where pulling or pushing operations are required. A folding platform is attached in a slidable manner to the sidewalls of the frame so as to position the platform at any level on either side of the body. Hydraulic locking means are provided to lock the frame in any selected position so as to withstand any pulling and pushing forces required.

Abstract: In a device for extruding hollow articles, e.g. tubes, the die is rotatably mounted in the die holder. The die has a hole for shaping the external surface of the tube. The axis of said hole is eccentric relative to the axis of the external surface of the die holder. The device comprises a needle for shaping the internal surface of the tube, the needle entering the die hole during the process of extrusion. The needle axis coincides with the extrusion axis. The die holder is made of at least two bushings, installed one inside the other. The axes of the internal surfaces of the bushings are offset relative to the axes of their external surfaces. The bushings are capable of turning for adjusting the position of the die hole axis relative to the needle. This design of the die holder makes it possible to minimize the eccentricity of the axes of the internal and external surfaces of the tubes extruded in the device realized according to the present invention and installed in a conventional press.

Abstract: Feeding apparatus for feeding material for a predetermined distance past a predetermined point on a feed-path comprises a pair of feed rollers, one of which is coupled to a stepping motor. A sensing means in the form of a light beam is provided on the feeding path at the predetermined point and when the material being fed intersects and interrupts this light beam, a control means for the stepping motor commences to count pulses transmitted to the motor. After a number of pulses have been counted which causes the motor to feed the material precisely to the predetermined location, the motor is stopped. The control means also has means for actuating a further apparatus (such as a crimping press) which performs an operation on the material. This control means is effective to delay energization of the crimping press is the press is not in a state of readiness for performing the crimping operation.

Abstract: A sheet metal dent removing tool for attachment to an impacting device, the tool tapering to a metal piercing tip and having a narrow side with opposite convex surfaces converging at their edges to form metal shearing ridges. The ridges, forming the outline of the broad side of the tool, are joined to a neck portion by rearwardly converging shoulders so that when the tool has penetrated the metal and is rotated 90.degree. about its axis, the shoulders lock the tool to the metal whereby the impacting device can be used to pull the dented area back to its initial shape.

Abstract: A new and improved pulling hook apparatus for straightening and bending automobile frames and bodies wherein the hook is formed having a longitudinal handle portion with a hook pulling portion at one end and an eye connecting portion at the other end and including a pulling plate member having a greater size than the hook pulling portion for removably mounting on the hook pulling portion to increase the work engaging surface of the hook to apply the force over a larger surface area of a work piece.

Abstract: A control system for controlling operating steps of a press and/or transfer mechanism therefor in dependence upon the position of a drive shaft of a drive mechanism of the press. The system includes a coded pulse generator supplying coded pulses indicative of the position of the drive shaft to a decoder from which decoded pulses are supplied to a control pulse distributor to an amplifying unit and appropriate regulating member for regulation of the operating step. A monitoring unit is also provided for monitoring the operation of the control system.

Abstract: The tool disclosed includes a base for attachment to the wheel suspension system. Upright arms project from the tool base and carry an abutment assembly which is adjustable to support the end of different types of power cylinders in various operative relationships to the suspension system and which cylinders impart corrective bending forces to the suspension system.

Abstract: Repairing dents as in automobile bodies through the use of a tool having an appliance to underlie the dent approximately at the center thereof and to withdraw the dent to its approximate original location by means of a hand operated tool including a rod retracting the material of the dent in increments, retraction of the rod being inhibited by a cockable washer. The provision of extra wide detachable legs for straddling the dents so that larger dents can be processed, said legs being mounted on a bracket which holds the rod.

Abstract: The method of making a profiled work of aluminum or aluminum alloy comprises the steps of loading a billet of aluminum or aluminum alloy in a container having an extruding die at its one end and urging the billet against the extruding die by a ram so as to extrude the billet through the die to form a profiled work of aluminum or aluminum alloy with its cross-section conforming with that of the die. A disc of aluminum or aluminum base alloy containing at least one or two elements selected from the group consisting of elements B, Be, Ti, Zr, W, Mo and V is located between the extruding die and the billet before the billet is extruded.

Abstract: A press brake plate lifter has horizontally extending lift rails pivotally mounted to a supporting framework, for supporting and lifting sheet stock during press brake operations. The lift rail pivot axis is coextensive with the bending axis of the press brake die. The material support lift rails are horizontally adjustable to accommodate sheet stock of varying dimensions, while plate clamps mounted on the lift rails hold the sheet stock firmly during the bending operation.

Abstract: An anchoring device for use in straightening automobile bodies of unitized construction includes a hook comprising an elongated steel bar having a long, generally straight portion bent at one end to form a C-shaped portion for being releasably hooked around a means of attaching the leaf spring of the automobile suspension system to the automobile body. A chain is releasably attached to the straight portion of the hook, and in one method of using the hook the free end of the chain is affixed to the ground to anchor the rear of the automobile against a pulling force applied to the front of the automobile.

Abstract: The feeding mechanism serves to intermittently feed stock to a processing machine and comprises a rocker lever having at its outer end an arcuate surface shaped according to an arc of a circle, crank drive comprising a crank which is operatively connected to said rocker lever, said crank drive being operable to impart an oscillation to said rocker lever, a clamping roller adapted to cooperate with said arcuate surface and forming a feeding clamp therewith, a retaining clamp for holding said stock in position, and control means for cyclically opening and closing said feeding clamp and retaining clamp in alternation.

Abstract: In the extrusion of a material, which can be a metal feedstock, through a die means by maintaining frictional engagement of the material with passageway defining surfaces of a member which is moved towards the die means such that frictional drag of the passageway defining surfaces urges the material through the die means, the improvement of enhancing the resultant available extrusion force by either increasing said frictional drag or reducing the frictional resistance to movement of said material relative to non-moving parts of said passageway, or a combination of both.