Abstract:
A method and apparatus in the hot extrusion of metal billets into solid or tubelike sections in which after extruding the billet into the desired extrudate and an integral discard and prior to removing the extruding ram, the billet container is withdrawn a short distance, but is kept in contact with a portion of the discard.
Abstract:
Device for setting fire rings in gaskets which comprises means for supporting a metallic sheet provided with holes having upstanding cylindrical rims dimensioned and positioned to register with holes in the gasket, means for cutting rings encircling these rims, means for locating the gasket on the rings so that the rims project through the gasket holes, and means for pressing the rims are down against the gasket. The invention includes a machine which carries out all but the first of these steps successively and automatically.
Abstract:
Improvement in the process of hot extruding metal tubes in a hydraulic press, in which the metal billet inserted into the press has been pierced to a bore diameter largly exceeding that of the extrusion mandrel and the force of the press is applied in a progressive manner.
Abstract:
A process for the manufacture of seamless steel tubing comprising continuous casting rectangular cross-section bars, cutting the bars into billets, heating the billets, upsetting and piercing the billets into hollow circular cross-sectioned blanks, hot extruding the blanks into seamless tubes and stretch reducing the seamless tubes where necessary.
Abstract:
A method of providing an apertured gasket support with a ring of sealing material encircling said aperture, using a pair of mold parts, each of which has an annular recess in one face thereof connected to a sealing material reservoir, the inner diameter of the recess being greater than that of the aperture, according to which one mold part is positioned on each side of said gasket support with the recesses and aperture aligned and the inner edge of each recess spaced from the edge of the aperture and injecting liquid sealing material into both recesses, while simultaneously clamping the gasket support between the mold parts.
Abstract:
The process of hot extruding metals and alloys which are subject to surface contamination at their deformation temperature is improved by coating the billet surface, while cold, with a thin layer of a powdered metal such as copper, and thereafter placing a second coating of a powdered amorphous material on top of the metal powder layer. The amorphous material is capable of forming a continuous protective layer when heated to the temperature at which surface contamination takes place during the extrusion operation.