A process for producing an extrusion of small cross section from a workpiece in which the workpiece is subjected to a bulk compressive stress in a container so that the end of the workpiece is forced into a reducing die at the end of the container. The material of the workpiece in the reducing die is subjected to an additional localised compressive stress by a tool member having a working face which is applied to the material of the workpiece in the reducing die. Under the combined compressive s...

Apparatus including a die, for forming shapes from blanks. The blanks are drawn over a support surface upstream of the die with respect to the direction of travel of the particles which form the blank before they reach the die cavity and this surface is vibrated so that each point on it vibrates in a direction that passes through the drawing axis. The blank may be held against this surface by being sandwiched between it and a blank holder, the surface of which may vibrate in a similar direction....

Method and apparatus for producing from a workpiece, such as a billet, product of reduced cross section, such as wire. A load pattern is applied to the workpiece which induces compressive stresses at a localised region of the workpiece at an orifice defining the product cross section. Heat is applied to the workpiece at a localised region adjacent the orifice. The compressive stresses and heat applied are such that the material of the workpiece is caused to flow through the orifice.

A method of forming a stiffened panel in which an interior sheet of a superplastic material is placed between two face sheets and attached one to the other in alternate sequence so that, as the face sheets are moved apart, the attached regions of the interior sheet are drawn with them.

A method of producing a metal article, for example a pressure vessel, including the steps of forming an inflatable envelope of a super-plastic metallic alloy, heating the envelope to within the temperature range for super-plasticity, and applying a differential pressure between the interior and the exterior of the envelope such that the envelope expands as a balloon.

A forming tool for generating a predetermined configuration in a rotating metal workpiece includes a tool body having a shelf formed thereon, a shim on the shelf, a cutting insert having a cutting edge on the shim and a clamp assembly for clamping the insert and the shim on the tool body. The clamp assembly includes a clamp member having top and bottom sides, and a pair of screws for securing the clamp member on the tool body. The clamp member has a pair of substantially parallel elongated front...

This invention relates to a method of forming a sheet metal article such as an electrical contact wherein the direction of bending of the article is the same as the direction of shear, whereby the stress areas of said article are maintained at the inner portion of the bends in the article, thereby minimizing the chance of subsequent fracture.

A device for fabricating laminated plastic surface objects which includes a support frame; a bed attached to the frame; a platen mounted above the bed for holding a sheet of laminated plastic material in a fixed position on the bed; an elongated die connected to the frame proximate to and along one side edge of the bed; and pressure means for bending the plastic material over the one side edge of the bed and urging said material into the die. Second pressure means can be connected to the frame f...

A method of sealing a metallic tubular workpiece by rotating the workpiece relatively to a welding torch arranged transversely with respect to the axis of the workpiece, the speed of rotation of the workpiece relative to the torch being increased while the current fed to the torch is reduced so that the workpiece is cut into two portions, at least one having a sealed end closure formed by recasting of the metal of the workpiece melted by the torch.

Forming press for making perimetral bends on metal sheets or plates comprising a support structure having a C-shaped cross section with horizontal arms, a fixed lower counterblade, and an upper blank counterblade, movable in a vertical direction, a cutter block carriage, movably guided in the vertical direction between the arms of said support structure, an upper bending blade and a lower bending blade mounted on said cutter block carriage and having respective active parts cooperating with said...