Abstract: The present invention relates to a method for producing a link unit, comprising the steps of provision of a carrier, reshaping of the carrier in the region of a first connecting section in such a way that an upset section is formed, the wall thickness of the carrier being increased in the region of the upset section, and provision of a node element with a joint section, and connecting of the joint section to the first connecting section by means of a rotary friction welding method. Furthermore, the invention relates to a link unit, in which a carrier which is configured in the manner of a hollow body is connected to a node element by means of a rotary friction welding method.

Abstract: A wound dressing has a micro-architecture to produce appropriate strains in cells to promote the healing a wound. The apparatus includes a wound cover for defining a reservoir over a wound in which a negative pressure may be maintained by forming a substantially fluid-tight seal around the wound, a vacuum source in fluid communication with the reservoir and suitable for providing an appropriate negative pressure to the reservoir to stimulate healing of the wound, and a porous structure positioned in contact with the wound for delivering micro-mechanical forces to localized areas of the wound. The porous structure comprises a three-dimensional film material having directional apertures formed therein.

Abstract: A structural metal tube having a variable thickness varying between a minimum thickness and a maximum thickness providing structural rigidity and support for the tube. The structural tube may be polygonal, such as rectangular and utilized as an automotive A pillar, wherein the thicker wall provides a support for a hinge plate. The method includes rolling the desired configuration of the tube and welding the thinner edges.

Abstract: The invention relates to a sheet metal plate, especially made of steel, for producing motor vehicle body components. In order to make the body component sufficiently rigid at highly stressed points in spite of using lightweight materials, the sheet metal plate (11) is provided with local reinforcement zones (13, 14). To this avail, the sheet metal plate (11) is joined together from at least two cut metal sheets (7, 9) with a straight seam (10). At least one of the cut metal sheets (7) comprises several parallel strips (2 to 6) having different strengths while each local reinforcement zone (13, 14) lies within a reinforced strip (2, 3).

Abstract: A bent work is integrally formed at low cost by bending a belt-shaped thick steel material having an L-shaped cross-section so as to form a cylinder and by welding ends of the belt-shaped thick steel material to each other, the bent work being used as a bearing-receiving unit or the like.

Abstract: Method for the fabrication of cones of sheet material where the blank includes two curved edges that are circular and have the radius R and r respectively and a common center C. The blank further has two straight lateral edges which are angled in relation to the circular edges. An angle .alpha. between the radius, through a corner and a first straight edge is as great as an angle .beta. between the radius through a second straight edge. A frustum of a cone is obtained from the blank after rolling the cone such that the lateral edges have been united to make a joint that runs helically around the cone.

Abstract: A method for roll embossing an enhancement pattern into a surface of a metal strip. The method is intended for use in manufacturing roll formed seam welded metal tubing having interior or exterior surface enhancements to improve the heat transfer characteristics of the tube. Metal strip produced by use of the method has a weld zone adjacent each edge of the strip that does not have the surface pattern embossed upon it but has been rolled to a thickness less than the initial thickness of the strip feedstock. The amount by which the rolled thickness of the strip in the weld zones is reduced from the initial thickness is such that the portions of the strip in the weld zones undergo the same elongation as the central portion of the strip which receives the roll embossed surface enhancement. In this way no tensile stresses are introduced into the weld zone and it has a uniform and predictable thickness that will ensure a good welded seam during later welding into finished tubing.

Abstract: A method is disclosed for easy and inexpensive fabrication of fold-up frames having diverse geometric configurations for flat packs (metal packages) for housing discrete and integrated circuit chips. The method includes a first step of cutting a piece of flat metallic stock to predetermined length and width consistent with the number of fold-up frames and the perimeter required for the specific fold-up frame configuration to be fabricated, respectively. The flat stock is then milled to form a plurality of grooves of predetermined angle lengthwise in at least one major surface thereof to define the number of sidewall members in the final configuration of the fold-up frame. The milled flat stock may then be sliced to form a plurality of individual milled frames each having the predetermined height required by the specific configuration fold-up frame. Apertures are formed in the milled frame by punching or piercing all sidewall members simultaneously in a single operation.

Abstract: An anchor bolt comprising a bolt having an upper cylindrical part with an outer thread adjacent its top and a lower conical head, and a sleeve surrounding the bolt, the sleeve comprising an upper cylindrical portion and an annular expander, the expander having multiple slits therein which open to the bottom end and extend axially. The slits form expansion pieces therebetween having curvatures which, before expansion of the pieces, are substantially the same as the curvatures at the corresponding positions of the outer peripheral wall of the conical head, which the pieces contact after expansion.

Abstract: A method of producing a reinforced duct structure for use with turbo-fan aircraft engines and the like. The duct is first cut from a flat metal sheet in a predetermined pattern. The sheet is rolled to form a tubular or conic structure of the approximate desired configuration and welded along the open seam. The welded tubular structure is then expanded to the exact required shape. The expanded tubular structure is cut out in selected areas to form a tubular grid structure. A tubular liner conforming to the inner surface of the tubular grid structure is installed and bonded to the grid structure forming an integral tubular structure of the desired configuration and strength and; attachment of any required mating flanges and structure bosses to the integral tubular structure.

Abstract: First, a rectangular metal plate having thinner and thicker portions corresponding to a lighter-wall portion and heavier-wall portion of a pipe to be manufactured is prepared. Before bending the plate until both edges thereof meet to form a tubular piece, the plate width is adjusted by cutting off part of the thinner portion so that the desired peripheral lengths are attained in both lighter- and heavier-wall portions of the pipe. The width-adjusted plate is then bent until both edges are butted together to form a tubular piece. By butt-welding the adjoining edges, a metal pipe with longitudinally differentiated wall thickness is obtained.

Abstract: A tubing mill for roll forming a strip of metal into a fluted tube having alternating longitudinally extending high and low portions on its outside surface. The mill includes feed means for supplying a generally planar strip of metal and embossing means for forming the high and low portions on the surface of the strip to be formed into the outside surface of the tube. The mill also includes breakdown means for sequentially transversely bending the strip from its planar condition. The breakdown means includes roller means having a gripping surface for engaging the strip and having alternating high and low portions shaped to mate with those of the strip. Additionally, the mill includes closure means for bringing into abutment the lateral ends of the bent portions of the strip, and welding means for seam welding the ends together.

Abstract: A method of production of a part formed with an opening wherein a metal strip material is subjected to rolling at its outer peripheral portion to have its thickness slightly reduced and shape the metal strip material into a ring-shaped blank, and at least one of inner and outer peripheral portions of the ring-shaped blank is drawn by a press to form at least one flange. The metal strip is supported in coil form on an uncoiler and payed out therefrom and subjected to a straightening before being subjected to rolling. When the metal strip material is rolled, its inner side is wrinkled. The ring-shaped blank is cut and a projection is formed at one end portion and superposed on the other end portion to be joined by electric spot welding to provide a completed ring-shaped blank. When the blank is drawn to form the flanges, by virtue of the wrinkles and thinned outer peripheral portion, the thickness of the part becomes substantially uniform.

Abstract: The invention relates to a method for the manufacture of a pipe bend, whereby to obtain a uniform wall thickness one starts from a strip or sheet in the butted tube manufacture, the thickness of which constantly changes such that on the butted tube there is in each case respectively a longitudinal line with the greatest and smallest pipe wall thickness, lying opposite each other on the pipe cross section.

Abstract: A resilient plastic web exhibiting a fiber-like appearance and tactile impression and method and apparatus for its manufacture. In a preferred embodiment, the web exhibits a three-dimensional microstructure comprising a regulated continuum of debossed areas of non-uniform cross-section along their length. In a particularly preferred embodiment, the debossed areas comprise capillary networks interconnecting the first and second surfaces of the web, said networks being of decreasing size in the direction of said second surface to promote fluid transport from the first surface of the web to the second surface and inhibit the flow of fluid in the reverse direction. Forming surfaces utilized to produce said webs are constructed by laminating a multiplicity of thin plates having patterns of apertures therein to form an integral structure exhibiting properties and characteristics unachievable by prior art machining and weaving techniques.

Abstract: A device is provided for connecting together the ends of pipes or tubing or for repairing a fault in a pipe or tubing. The device is comprised of a resilient sheet member in the form of a coil having a layer of heat sensitive bonding material applied to the inner surface of the resilient sheet member. The resilient sheet member coil is formed to an inner diameter slightly less than the outer diameter of the pipe or tubing. In the case where the resilient sheet member is used as a connector, the resilient sheet member is sprung to a diameter larger than the outer diameter of the pipe or tubing and retained in this expanded form by a heat sensitive material which melts upon being heated to allow contraction of the connector. At the same time, the heat sensitive bonding material forms a tight bond to the two ends of the pipes or tubing to be connected.

Abstract: A method of forming an exhaust gas conduit tube wherein a plurality of captured take-up slots in the tubular wall define a deformable region near a free end of the tube, which region will cooperate with clamping means encircling the region to clamp the tube to a second tube inserted telescopically therein. The captured nature of the slots enhances the structural integrity of the tube end. The method includes forming the apertures along an edge of flat steel stock, rolling the steel stock into a tube wherein the apertures are adjacent a free end and welding the longitudinal seam. The free end portion is further flared for strength and to facilitate entry of a second tube.

Abstract: The present invention relates to a suspension member and the process for constructing the suspension member. The suspension member comprises a folded single sheet of metal which is enlarged at one end to couple to a wheel assembly and U-shaped at the other end to pivotally connect with a vehicle frame. The process of constructing the suspension member comprises the steps of stamping a single sheet from a piece of stock, deforming the sheet to form a pocket defining the enlarged end, folding the sheet to form a substantially rectangular cross section and welding the seam between adjoining edges of the folded sheet. In order to support a spring assembly a tube extends through the folded sheet and cooperates with the spring assembly to attach the latter to the folded sheet.

Abstract: A method for making a rotor for a caliper brake with a disc mounted on a cylindrical adaptor. The disc includes a coiled metal strip having a rectangular cross section with edge surfaces aligned to provide friction faces for engagement by friction lining carriers of the brake while decreasing the vibration and noise during braking. The ends of the coiled strip are welded to the disc and the overlapping surfaces of the coils are brazed together.

Abstract: Where the burner liner for gas turbine engines is made up of overlapping rings secured together, the ring is formed by rolling a strip to a selected shape and dimension crosswise of the strip so as to have appropriate thickness in the heavily stressed area, and less thickness where the stresses are lower, and then forming a selected length of the strip into a ring by bonding or welding together the ends of the selected length to make the desired ring dimension. This may be followed by shaping the ring into the desired conical shape to fit with adjacent rings to form the burner liner.

Abstract: A track shoe adapted for use in an endless track assembly for a track-type vehicle comprises a base having a pair of sidewalls formed integrally thereon. The sidewalls extend away from the base in converging relationship with respect to each other and terminate at edges which may be welded together. The method for making the track shoe comprises the steps of forming a blank to include the base and sidewalls of the track shoe, bending the sidewalls towards each other and then welding them together, if so desired.