Abstract: A tool for removing dents from tubing, particularly dents from curved brass tubing used in musical instruments such as trombones, trumpets and french horns. The tool is designed not only to drive a barrel-shaped dent ball past the dent to raise it, but also to reverse the procedure to remove the tool from the horn in working with tubing that is not open ended. The tool has a series of barrel-shaped force transmitting beads which are pivotally connected to each other and to a tubular handle at one end. At the other end a length of cable extends through a fixed metal driver ball to a metal retainer bead at the end of the cable. A barrel-shaped dent ball is strung on the cable for movement between the driver ball and retainer bead for impacting motion by reciprocation of the handle when the dent ball has been lodged underneath the dent to be removed.

Abstract: An operating head (24) carrying a hammering element (28) is introduced into the interior of the workpiece at a position where the workpiece, as measured by a measuring instrument (49,50) shows maximum deviation from the axis of rotation of the rotation symmetrical body. The hammering element is controlled to hammer against the inside at a rate which depends on the distance of deflection and/or the position thereof, during rotation, or longitudinal movement of the workpiece with respect to the operating head, for example by controlling a potentiometer (19) by an eccentric control disk (16) which has its maximum eccentric deflection of position in line with the maximum eccentricity, or deflection of the workpiece (7) from the axis of rotation. The apparatus can also be used to remove dents and the like, by hammering against the dent and longitudinally shifting the workpiece with respect to the hammering element.

Abstract: A flexible ball mandrel for bending tubes which have different diameters and walls of varying thickness consisting of a series of self-lubricating balls, the diameters of which may be adjusted, and which are equally spaced apart for maintenance of a constant separation during a bend cycle connected to a shank for securing the mandrel elements properly together.

Abstract: A method and apparatus for cold working a metallic blank having a central hole into a substantially annular or cylindrical article such as an internally and or externally toothed gear, with the method including forcibly inserting a hollow metallic blank at a normal temperature into a die cavity formed between a mandrel placed on a fixed base and a die concentrically surrounding the mandrel so that the blank is plastically deformed between the mandrel and the die; forcibly inserting a subsequent hollow metallic blank into the die cavity while the relative position between the mandrel, the die and the first blank being plastically deformed therebetween is kept unchanged; and urging the subsequent blank against the first blank to extrude the first blank forwardly out of the die whereby the first-said blank is formed into a tubular article.

Abstract: A flexible tube-bending mandrel has a longitudinally-split shank link that is unthreaded, but recessed to receive a nut that threadedly engages the bolt for holding the link to a mandrel shank. The mandrel center links are longitudinally split for ease of assembly of their ball-and-socket interconnections and have their socket ends externally threaded to receive an internally-threaded ball segment that holds the center link sections in assembled condition and effectively restrains relative longitudinal motion of the two mating link sections.

Abstract: An apparatus for shaping a strip, especially a metal strip includes a pair of working rolls which are provided with a plurality of forming tools spaced about the circumference of the rolls. Arranged before the working rolls is a pair of guide rolls which run in synchronism with the strip speed. In order to be able to increase the operating speed of the apparatus, i.e. to allow the working rolls to run at a higher speed than the advance speed of the strip, in between the guide rolls and the working rolls a roller is located which is movable in a direction perpendicular to the advance motion of the strip and is supported by the strip itself and by springs located in respective casing. A compensation between the different speeds of the guide rolls and the working rolls is provided by the gradual depression of the roller by the strip against the force of the spring.

Abstract: Apparatus for bending a light gauge, profiled, metal panel to a curved shape, including an anvil mounted on a frame and having a part-annular surface, an arm mounted for pivotal movement about the center of curvature of the part-annular surface, a roller carried by the arm at a position spaced from the center and rotatable about its own axis, so that it can roll in an arc adjacent the annular surface, a mandrel carried by the arm for movement therewith at a location between the roller and surface, the mandrel comprising a plurality of blocks each having its length parallel to the roller axis, the blocks being juxtaposed in side-by-side relation and each shaped to conform to the profile of the panel to be bent, and at least one flexible element passing through all of the blocks and loosely holding them in juxtaposed relation, but allowing slight relative movement whereby, in use, with the mandrel engaged in the profile of a panel to be bent, the mandrel acts as a shape retaining member for the profiled panel,

Abstract: A slide is vertically movable in a press frame and supports the upper die. A threaded main spindle is operative between the press frame and the slide. A clutch disc connected rationally rigidly to the spindle is connectable by friction contact to a driven disc flywheel for the operating stroke of the slide. Piston-cylinder units act between the press frame and the slide for returning the slide to the starting position. The spindle is axially clamped between two spring columns, one of which acts between one end of the spindle and the slide and the other of which acts between the other end of the spindle and a counter thrust bearing axially fixed in the press frame.

Abstract: A method of and an apparatus for shaping a hollow blank member by a forging operation is provided. The interior of a hollow blank member is filled with a liquid pressure medium which is enclosed therein in sealed condition. An external pressure is applied to the hollow blank member, and the pressure of the pressure medium is maintained as an internal pressure which opposes the external pressure, and part of the pressure medium is discharged externally while applying a desired plastic deformation to the hollow blank member.

Abstract: A sheet metal working press including an upper press member and a lower press member which are movable relative to each other to work a sheet of metal therebetween. One of the press members has a groove formed in the vicinity of an effective working area defined by the movement of the press members toward each other. At least one holding block is loosely fitted in the groove. It has at least one holding surface and a plurality of holes formed in a surface remote from the holding surfaces. An elastic member of polyurethane is tightly fitted in each of those holes.

Abstract: This invention relates to tube bending mandrels and, more particularly, to an improved version thereof characterized by a threaded connection between the tube-shaping ring and the necks of the ball-carrying links that functions in cooperation with an annular stop-forming rib and a retaining ring at opposite ends of the threaded link neck section to resist equally well both tension loads and compression loads while maintaining precise axial spacing between subassemblies in an assembly where, except for the links at opposite extremities, all parts remain fully interchangeable.

Abstract: A crimping tool of the type employed in crimping or compressing an article such as an electrical connector which has a substantially fixed jaw which has a surface against which an article is compressed, a ram having a surface for supporting a die and an article, the ram being mounted for movement toward and away from the jaw, and a die holder which is pivotally mounted to the ram to keep the compressing surface of the jaw and the supporting surface of the ram parallel throughout the movement of the ram in the event that the jaw deflects slightly during operation of the tool.

Abstract: Modular male and female drawbead structures comprise wafers of varying thickness which abut each other and are longitudinally wholly or partially aligned relative to each other in respective slots of die binders. The male structure has a body portion including a base wall and side walls which match and are spaced from like walls of a respective slot. A bead portion projects from an outer wall of the body portion and is joined thereby across concave shoulders. The female structure has a body portion including a base wall seating on the matching base wall of a respective slot and side walls which match and are spaced from like walls of a respective slot. A groove portion in the outer wall of the female module interfits with the bead portion and is joined to such outer wall by convex shoulders which match the concave shoulders.

Abstract: To produce an annular metal frame having an L shaped half-section for a lipped seal, a metal strip is cut into lengths, each of these lengths is rolled up circularly until its two ends are in abutment, so as to form a cylindrical ring (7), then this ring is driven into the cavity of small thickness defined between two parallel guide surfaces (S, S'), the entrance to said cavity having a shape complementary to that of the ring and the bottom of the cavity having a shape complementary to that of the frame to be produced.

Abstract: An internal mandrel (10) is disclosed which is used for supporting the inner wall (30) of a pipe (12) during bending. The internal mandrel includes a urethane plug (31) which is compressed between the piston (60) of a hydraulic cylinder (56) and an end plate (36). This expands the urethane radially outward into contact with the inner wall (30) of the pipe to support the pipe during bending. Resilient steel strips (88) can be mounted on the exterior surface of the urethane plug (31) at the inside bend of the pipe to increase the effective wall thickness of the pipe at the inner bend to reduce the likelihood of deformation during bending. In a second embodiment, internal mandrel (200) includes an annular urethane plug (204) positioned between a resilient cylinder (202) and the inner wall of the pipe (12).

Abstract: The invention relates to an apparatus for manufacturing a metal pipe. At present, accurately measured, thick-walled pipes to be used as rolls must be manufactured in a plurality of working steps. The manufacture of pipes of accurate diameters is complicated e.g. due to inner stresses in pipe blanks which results in deformations in internal or external machining of pipes. An object of the present invention is to overcome the drawbacks of the prior art.

Abstract: The mandrel is a high strength mandrel for bending tubing that is easily assembled in uniform pitch or multiple pitch ring spacing or combination of each embodiments. It is a mandrel with ring segments pivoting about their own center with the ring string flexible in any direction or multiple directions simultaneously. The mandrel has a detent structure tending to hold the ring string straight during loading of the tube over the mandrel using two detent balls and one spring in each ring ball segment in a mandrel linkage design absorbing, generally, the total flex angle within the first two links thereby allowing a larger link diameter for greater mandrel strength. The individual ring ball segments rotate about the centerline of the mandrel to effectively distribute wear around the circumference of each ring segment.

Abstract: A spine for flexible aquarium air hoses includes a plurality of rib members, each having at least three radially disposed ribs, and each adjacent pair of rib members are connected at the centers by a substantially flexible connecting member. The spine is inserted inside the flexible hose at areas where the hose is to be bent, thereby preventing kinking of the hose.

Abstract: The pipe-bending core consists of elements which are coupled to one another in articulated manner and threaded like a string of pearls on a wire cable, and which are expanded on being pushed against one another, but nevertheless remain articulated. The principle can be applied to pipes of differing cross-section. After releasing the bracing arrangment, the elements contract again by means of spring bias, so that the core can easily be withdrawn from the bent pipe.

Abstract: A hydraulic wedge mandrel is disclosed for supporting top and bottom cylindrical segments of pipe during cold bending of the pipe. Bottom and top assemblies (14) and (16) are vertically movable to and away from each other for expanding and collapsing the mandrel. Bottom and top arcuate support segments (18) and (22) support the bottom and top assemblies (14) and (16) respectively. Bottom spring plate (20) is mounted to bottom arcuate support segments (18) opposite bottom assembly (14) and top spring plate (24) is mounted to top arcuate support segments (22) opposite top assembly (16). Secured to the top of bottom spring plate (20) and the bottom of top spring plate (24) are a plurality of wedges (28).

Abstract: A method of making a heat shield for an exhaust system tailpipe which comprises the steps of positioning a blank of sheet metal between a die having a forming surface of generally arcuately concave cross-sectional configuration which extends in a generally arcuately convex direction and a straight cylindrical body of elastomeric material having a longitudinal axis extending generally tangentially with respect to the arcuately convex direction of extent of the die forming surface, effecting an initial relative movement between the die and the cylindrical elastomeric body in a direction toward one another so as to compress a central portion of the sheet metal blank to a central portion of the die forming surface by a central portion of the exterior surface of the cylindrical elastomeric body while the latter is in a straight condition, and progressively flexing opposite end portions of the cylindrical elastomeric body in directions toward the end portions of the die forming surface so as to progressively compre

Abstract: The present invention relates to single actuator blanking and draw pad force control for a drawing press, which includes a unique swivel for the hold down pad comprising a confined elastomeric member which has high axial stiffness, but relatively low rotational or pivoting stiffness about an axis normal to the actuator axis. Further, the pad can be combined with air pressure for holding a sheet of material during the blanking and drawing operations.

Abstract: This invention relates to an improved tube bending mandrel of the general type having fixed and bendable sections and wherein the latter comprises a chain of ball and socket elements linked together in end to end relation with each such element being encircled by a ring of the same diameter as the fixed section cooperating therewith and with one another to define limited movable universal connections therebetween. More specifically, the instant invention relates to an improved ball and socket assembly wherein the ball portion comprises two or more spherically-surfaced ring segments which cooperate with each other and with a spherically-concave head formed integral with the body in which the socket is formed on the opposite end of the link to form the ball.

Abstract: A pipe bending apparatus for bending thin wall pipe used in oil and gas pipelines. The apparatus includes a housing section with an upper bending die connected to its frame. Mounted within the housing section are a pair of flexible external bending shoe assemblies for clamping around the external surface of that section of pipe to be bent. The apparatus further includes a flexible mandrel aligned between the external bending shoe assemblies and adapted for being inserted into the pipe and expanded during bending operations. A positioning assembly is also connected between the mandrel and the housing section for accurately positioning the mandrel in the pipe and moving the pipe with respect to the apparatus while insuring that the bend is properly aligned. The mandrel further includes a series of slidably mounted shoe assemblies which move in a toggle-like manner to engage the inner surface of the pipe.

Abstract: Rotary internal pipe bending mandrel, wherein sets of pipe engagement elements at opposite sides of the pipe interior are actuated by generally radially disposed toggle elements which expand and retract the pipe engagement elements by rotations of a central assembly. The elements which support the pipe engagement elements are disposed in circularly spaced groups which are axially spaced along the direction of the pipe, and each group is separately expanded by a separate fluid motor assembly. The apparatus has improved the load bearing characteristics because it has positive end engagements of the toggles, whereby the pins or shafts on which the toggles are pivotally mounted are not excessively strained.

Abstract: An apparatus for manufacturing elongated curved tubular elements sequentially clamps longitudinally spaced end portions of a straight elongated tubular section, confines a central portion of the tubular section intermediate the clamped end portions between two dies, applies forces to at least one of the dies to displace the same and thus also the central portion of the tubular section in a predetermined direction and to a given extent with respect to the clamped end portions so that substantially S-shaped transitory portions of deformed cross-sectional shapes develop between the clamped end portions and the central portion of the tubular section, and restores the cross-sectional shapes of the transitory portions preparatory to sequential retraction of the dies and unclamping of the end portions of the tubular section by means of at least one mandrel which is introducible into the tubular section through at least one of the end portions thereof for passage into and through at least one of the transitory portio

Abstract: A flexible mandrel for use in bending tubes and especially for producing tight bends in thin wall, high strength metal tubing. The mandrel comprises a series of ball members each of which is adapted to nest within the preceding ball of the series as the mandrel is flexed. The balls are free to rotate transversely and to slide longitudinally on a series of rigid link members which are flexibly interconnected. The balls and links are so constructed that as the mandrel is flexed, each ball pivots around a point located at or near the geometrical center of its outer curved surface.

Abstract: A device for cold working a metal sheet, with double action in a single operative stage, suitable particularly for forming drawn articles in a single body with a shaped and folded bottom, comprising reciprocating drawing means including a forming punch rigid with a first part of a reciprocating press; a male member arranged for carrying out a conventional drawing operation in cooperation with a sheet-presser; said male member receiving in its inside an auxiliary punch mounted partially slidable within said male member, said auxiliary punch being arranged for cooperating with an elastic element; the arrangement being such that at the point of maximum engagement between said forming punch and said male member said auxiliary punch carries out a first shaping operation of the bottom of said drawn body with the contemporaneous storage of deformation power in said elastic element and said auxiliary punch carries out the deformation or folding of said bottom at the moment of the mutual moving away of said male membe

Abstract: Pipe bending mandrel wherein oppositely disposed pipe wall engaging elements are connected to a drive unit at one end by toggle elements permitting inward and outward movements of the pipe wall engaging elements, and wherein said pipe wall engaging elements are connected to a longitudinal axial shaft of the drive unit by plural axially spaced toggle elements which move the pipe wall engaging elements inwardly or outwardly upon reciprocating movements of the shaft in opposite directions.

Abstract: A pipe bending mandrel having a housing assembly of a plurality of interconnected, axially aligned segmented housing subassemblies, each of which has an internal taper, a plurality of spherical members spaced along a tension member and adapted to coact with the internal housing tapers, a plurality of axially extending flexible strips connected to the housing segments, and an actuator connected to the spherical members and the housings to move the spherical members into the internal housing tapers to expand the housings into pipe supporting position within a pipe to be bent. Suitable wheels are provided for moving the mandrel into, through and out of the pipe.

Abstract: Internal mandrel for use in bending the ends of pipes, wherein a hydraulic cylinder actuates a system of levers and toggles to apply force across the interior of an end of a pipe in the direction in which the pipe is to be bent to prevent distortion and collapse of the pipe during bending adjacent to its ends.

Abstract: A press to form files that are made of sheet material, the press being capable of using tools that may be substituted one for another according to the desired shape of the file being made.

Abstract: Force maintaining toggle systems wherein maximum or near maximum force is maintained by a series of step wise toggle engagements. The forces may be applied between spaced objects arranged oppositely or circularly.

Abstract: Steering means, particularly for use with internal pipe bending mandrels, wherein upper and lower driven wheels are mutually expanded against the pipe wall by an intermediate free-floating hydraulic cylinder, and wherein at least one of the upper and lower driven wheels are rotatably disposed to provide steering. The steering assembly is affixed as a support at one end of the mandrel and serves to keep the mandrel upright within the pipe.

Abstract: A thin sheet metal orifice plate is disclosed having at least one orifice therethrough with a rounded inlet to improve flow and an outlet defined by an encircling projection whose axis accurately conforms to a predetermined direction. Apparatus for the production of such an orifice plate is disclosed and includes a forming tool operable to form a spherical boss in a flat intermittently advanced thin metal sheet of orifice blank material. The apparatus includes an orifice plate blank trimming tool having a punch and die assembly for accurately trimming the spherical boss from a continuous strip such that an annular flange is provided therearound. An orifice punching apparatus is provided having a chuck for holding an orifice plate blank adjacent to a resilient backing material. The chuck is supported by an angular adjustment apparatus which, in turn, is rotatably supported on a base and provided with a pair of detent mechanisms. The detent mechanisms secure the angular position of the adjustment apparatus.

Abstract: Internal pipe bending mandrel, which is expanded to fit tightly within the pipe and to support the pipe walls by plural sets of lever actuated jack means at opposite sides of the apparatus. The plural sets of jack means are spaced along the length of the apparatus, and are actuated simultaneously.

Abstract: A heavy duty pipe spreader to open formed steel-line pipe, approximately 40 feet long, of approximately 0.250 to 0.750 wall thickness, so as to obtain an approximate 2 inch permanent edge separation prior to O.D. sub-arc welding. The pipe spreader is comprised of an approximately 45 feet long boom, pivotally supported at one end by a vertically adjustable base support and intermediate its length by four hydraulically actuated devices under the boom and mounted to the floor; these devices retract as the pipe telescopes onto the boom. A device at the extreme front of the unit centers and assists in stabilizing the pipe and unit during spreading. The pipe is received on five support rollers, the first of which drives the other four, and all of which are fixed in place and rotate only to move pipe over the vertically adjustable boom. Attached to the boom structure are five sets of pivoted arms which are operated by wedge devices attached to a center pull rod.