Abstract: A heat exchanger tube has a tube end having two extended portions substantially opposite the other around the periphery of the tube end, and two shortened portions, each positioned between the two extended portions and substantially opposite the other around the periphery of the tube end. The tube end may be formed by removing opposite portions of the tube by cutting a disc-shaped portion with a generally smoothly curving periphery along a major portion of the width of the tube. Each tube is oriented within an opening in the header wall of a heat exchanger assembly having a header portion integral with a tank portion, such that the tube end two extended portions are oriented substantially perpendicular to the direction of fluid flow within the header and the tube end two shorter portions are oriented substantially in the direction of fluid flow in order to reduce interference with fluid flow.

Abstract: Through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.

Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.

Abstract: The invention relates to a method for producing a small thin-walled tube for a medical application or for a medical product, in particular for a stent, wherein a blank of an in particular bioresorbable magnesium alloy is deformed to produce a small tube, after which the small tube is used for medical purposes or from which the medical product, such as a stent, can be made.

Abstract: A shaft manufacturing apparatus includes a first drawing die having a cylindrical first cavity defined therein which is open at both ends thereof and a second drawing die having a cylindrical second cavity defined therein which is open at one end thereof. The angle formed between a first tapered part of the first drawing die and the axis of the first cavity is greater than the angle formed between a second tapered part of the second drawing die and the axis of the second cavity.

Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.

Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.

Abstract: A production apparatus for bending a multi-channel tube having an outer tube and a partition partitioning an interior of the outer tube into two or more channel holes is provided with a bending mold configured to bend the multi-channel tube in a bend radius; a pressure mold configured to press the multi-channel tube toward the bending mold; a chuck portion configured to hold and draw the multi-channel tube along the bending mold; and mandrels respectively inserted into the channel holes, each of the mandrels including; a mandrel body configured to support inner surfaces of each channel hole; a support device rotatably and movably supporting the mandrel body.

Abstract: Apparatus for manufacturing a tubular product comprising a tube forming means, a tube maintaining means, a drawing means and energy application means, in which the tube forming means comprises a formation aperture or series of apertures adapted to form a subject material drawn therethrough into a tubular shape, in which the tube maintaining means comprises a circular aperture or series of apertures adapted to maintain the subject material drawn therethrough in the tubular shape, in which the drawing means is adapted to draw the subject material through the tube forming means and the tube maintaining means, in which the energy application means is adapted to direct an energy to the subject material, or an energy absorbent component disposed thereon, such that the subject material is set in the tubular shape, and in which the tube maintaining means is adapted to maintain the subject material in the tubular shape during absorption of the energy.

Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.

Abstract: A method of elongating a tube (10) by way of a drawing ring (13), wherein, when elongating the tube (10), tensile forces are applied to an elongated tube portion (22) which has already passed through the effective drawing ring cross-section and that pressure forces are applied to a tube blank portion (11) which has not yet passed through the effective drawing ring cross-section, wherein the tensile forces are applied by a mandrel (16) which is positioned in the tube and which is connected to a front tube end in a form-fitting or force-locking way.

Abstract: A method and apparatus for draw forming, from a tubular workpiece, a tube or hollow shaft having a variable wall thickness, using a reducing die without an internal mandrel. A tension force is applied to the workpiece at one axial side of the die and a compression force is applied at the opposite axial side of the die. Changing the relative magnitudes of the tensile and compressive forces produces corresponding changes in the wall thickness as the workpiece passes through the die.

Abstract: A method of elongating a tube (10) by way of a drawing ring (13), wherein, when elongating the tube (10), tensile forces are applied to an elongated tube portion (22) which has already passed through the effective drawing ring cross-section and that pressure forces are applied to a tube blank portion (11) which has not yet passed through the effective drawing ring cross-section, wherein the tensile forces are applied by a mandrel (16) which is positioned in the tube and which is connected to a front tube end in a form-fitting or force-locking way.

Abstract: The invention is directed to a method and apparatus for advancing tubing into a draw die in reducing the diameter of the tubing. The tubing is advanced forward through opposed rotating tolls which apply compressive stress to the tubing and through a close fitting bushing. High pressure lubricant is pumped through a die socket which creates radial compressive stress on the tubing passing through the die socket into the draw die.

Abstract: A longitudinal seam welding apparatus for welding a longitudinal joint of a cylindrical main body of an electric motor frame comprises, on a base, a rigid tubular welding jig including a guide for engaging the joint of the frame main body to be welded for longitudinally guiding the frame main body, a hydraulic pusher for passing the main frame body through the welding jig, and a welding torch for seam welding the longitudinal joint of the frame main body.

Abstract: An apparatus and method of cold finishing of metals wherein a metal workpiece having a repeating cross section is advanced between a plurality of pairs of rollers and is driven through a die or cutting tool. The apparatus includes entry vee guides, a gimbaled die or cutting toolholder, special dies, and a special exit guide. The method results in bars having the usual cold finished qualities of accurate size, smooth surface finish, and uniform shape with the added quality of uniform residual stresses.

Abstract: An improvement in a process and apparatus for internal finishing and calibrating tubes is provided in which the internal surface of the tube is sprayed during the work on the tube with at least one lubricating jet directed to the work zone ahead of the passage of the tool.

Abstract: A device for the continuous extrusion of an object of indefinite length into another object of indefinite length by means of movable elements which move inside a resistant body forming a continuous pressure cylinder inside which the object to be extruded is driven towards a die by means of a viscous fluid surrounding it.

Abstract: Four trains of gripping element quadrants are continuously propelled around four endless paths, meeting along one length of travel common to the four paths and cooperating along said common length of travel to form a continuously moving train of centrally apertured gripping elements moving toward an extrusion die adjacent the end of said common length of travel. Rod of indefinite length, coated with shear transmitting medium and extending into the central apertures of the gripping elements, is drawn along the common length of travel by means of shear forces generated in said coating by said gripping elements and transmitted to said rod as viscous drag force along the surface of the rod. Axial and normal stresses are built up in the rod to stress the rod far above its yield strength and increase its ductility, or capacity for deformation without fracture. In this state, the rod is moved through and deformed by the die.