Abstract: The invention relates to a tube bending device, especially for thin walled tubes made from austenitic materials, e.g., for power engineering. The device consists of a pressure truck, adjustable gear, inductor heating coil, cooling section and a bending arm. The tube to be bent is positioned with one end on the pressure truck, and the second end fixed to the bending arm, and is freely placed in the inductor gear and axially moved in the inductor gear on guide rollers of an adjustable gear.

Abstract: The disclosure relates to a method of bending elongated materials such as pipe by applying a compressive primary bending force to the material at locations on either end of the portion of the material to be bent and locally stimulating bending of that portion of the material by the application of heat or a secondary bending force. The end portions of the materials are engaged by clamps, each clamp having an arm extending normal to the principle axis of the material. The compressive primary bend force is applied by exerting a force on locations on the arms displaced from the principal axis of the material, which force tends to draw the ends of the arms together.

Abstract: A process for bending large pipes comprises the steps of progressively and inductively heating the wall of a pipe within the region to be bent. The penetration depth of the heat energy is varied over the circumference of the pipe through shielding. The inner radius of the pipe to be heated may initially be heated before the entire wall is differentially heated. Apparatus for carrying out the process is also disclosed.

Abstract: A process and a machine for bending elongated articles wherein the article is led progressively past a heating device heating a small band of the article, the bending taking place in said band, wherein for controlling the thickness of a wall portion lying in the bend one measures the longitudinal speed of said still unbent wall portion before this reaches the heating device and likewise the speed after this wall portion has passed the heating device, and adjusts the distribution of the temperature in the heating zone of the band by changing the heating pattern in dependence on the relation between said two speeds.

Abstract: A means and method is provided for reducing radius expansion of bent, elongated materials due to "spring-back" occurring after the material is released from the bender clamps of a hot bending apparatus, wherein the longitudinal axis of the unbent portion of the material is displaced by a small angle from a perpendicular to a line running through the center of the bend and the bender heating means.

Abstract: A method of hot-stretching a cable and an apparatus for practicing the same in which first, second and third capstans of different diameters, having a common rotating shaft, and having grooves on the circumferential surfaces thereof for winding the cable a plurality of turns are provided in parallel between a stranding machine and a winding machine but on the side of the stranding machine. First and second guide pulleys are provided in parallel on the side of the winding machine, and the cable is wound around said winding machine through the first capstan, the first guide pulley, the second capstan, the second guide pulley and the third capstan. A front heat treatment equipment for heating the cable is provided between the first and second capstans, and a rear heat treatment equipment for heating the cable is provided between the second and third capstans.

Abstract: The invention provides an improved method and apparatus for pipe bending. In the method a leading portion of a length of pipe is heated and bent around a mandrel into a pipe bend, whereafter it is hot calibrated or sized to finished dimensions and at the same time cut off and trimmed to size at both ends. In a machine for carrying out the method, there are a heating chamber and an interchangeable bending mandrel. At the end of the bending mandrel there is a horizontally functioning calibrating or sizing device. A severing device is both in front of and behind the calibrating device for cutting off and trimming the pipe bend, and the pipe bend is movable both longitudinally and/or transversely in the horizontal plane.

Abstract: A pipe bending apparatus includes a pivotable bending arm carrying a means for engaging the pipe including an outer clamp attached to the arm and an inner clamp contacting the pipe and slidable within the outer clamp.

Abstract: A sheet-metal strip coming hot from a rolling mill is subjected to alternate bending in opposite directions before being wound on a mandrel, preferably while still in a temperature range of about 600.degree. C to 800.degree. C in the case of steel. The bending is carried out by deflecting rollers which may be mounted upstream of a pair of reverse-feed rollers, acting as a strip brake, preceding the driven mandrel.

Abstract: This invention relates to methods and apparatus for accomplishing bending work on long metal materials such as pipe, bar and rod.

Abstract: A method of continuously bending elongated materials may comprise engaging one portion of the elongated material with a guiding means and clamping a second portion of the elongated material in a clamping device driven to rotate with a movable axis of rotation perpendicular to a horizontal plane. A heated zone bounded by a cooled zone moving relative to the elongated material may be established in the material by suitable heating and cooling means disposed adjacent to the material. The elongated member may be driven to pass through the guiding means. Where a hollow elongated material is to be bent, a compressing means may be placed within the elongated material to inhibit deformation of the cross-section of the material. An apparatus for continuously bending elongated members may be comprised of plural means for performing the aforestated functions.

Abstract: A method for levelling a metal strip or sheet in which the metal strip or sheet is subjected to repeated bending by means of a roll arrangement of two or more rolls having a diameter of at least 600 times the thickness of the metal while cooling the metal strip or sheet from at least about 210.degree. C to about 50.degree. C at a cooling rate not lower than a critical cooling rate C as defined by the following formula but not higher than 200.degree. C/sec.

Abstract: Reducing or overcoming frictional drag on a rod moving through an enclosing tube by utilizing viscous drag of a liquid medium flowing through the tube in the direction of rod movement. Heated metallic rod moves through a hollow support tube leading from the output of a rolling mill to a mechanism for coiling the rod. The rod leaving the rolling mill is at an elevated temperature which places the rod in an extremely flexible state, so that the rod tends to become twisted within the tube to create "cobbles" or entanglements preventing further movement of the rod through the tube. The present apparatus and method, as applied to the disclosed embodiments of the invention, provide a flow of liquid medium through the tube in the direction of rod movement at a velocity sufficient to impart substantial force to the rod through the effect of viscous drag between the moving liquid medium and the rod.

Abstract: A means and method for bending elongated materials having a device for locally heating a portion of the material and a freely pivotable bending arm, is provided with a second arm for advancing the elongated material past the heating device and, in cooperation with the pivotable arm, exerting a bending moment on the locally heated portion of the material.

Abstract: A tube bending apparatus has a bed, a reciprocal feed carriage, power means to reciprocate the carriage, a first guide means at one end of the bed to receive the outer end of a first tube to be bent, mounted on said bed. Said apparatus includes a heating element on said bed outwardly of said first guide means adapted to surround the tube. The carriage is adapted to operatively engage the inner end of the tube for moving it outwardly of the bed. A bending arm at one end is pivotally mounted adjacent said one end of said bed and has gripping elements thereon to operably engage the outer end of the tube. The present improvement comprises a second guide means at the other end of said bed adapted to alternately receive the outer end of a second tube. A second heating element is mounted on said bed outwardly of said second guide means.

Abstract: A steel sheet, especially a thin one, can be manufactured from a hot rolled coil through heat treating steps by means of positively applying stress to the material. The product has excellent shape and mechanical properties such as drawability and toughness.

Abstract: The present invention relates to a method and apparatus of recovering ductility of a cold rolled metal strip. The metal strip is greatly bent a few times under tension along work rolls of small diameter rotating freely with extremely low friction or on fluid film of pressurized liquid in the space formed between the metal strip and a supporting guide. Thereby the stress-strain curve of the metal strip is altered, and the change results in recovering ductility of the metal strip.

Abstract: Apparatus for bending pipes is disclosed including a bed supporting the pipe to be bent; a clamping bending head rotatably mounted on the bed in the bending plane; longitudinal guides on the bed and a heater mounted on those longitudinal guides. A first hydraulic cylinder mounted on the bed to move the heater over the guides and a further hydraulic cylinder to longitudinally feed the pipe during the process of bending.

Abstract: A method for producing a cutting face from a hard cutting material for engineer's tools comprising, essentially, presenting the metal stock to a feed slot within a forming core, heating the same to its deformation temperature and then forcing now deformed stock through said forming core into the desired shape. A helical cutting face produced by such method having a length greater than one-third its total lead; a helix angle in the range of 10.degree.-45.degree.; being of a length of one and one-half inches upward depending upon the particular tool requirement; and being of any desired cross-section.

Abstract: A mandrel mounted on a support and corresponding to the configuration of the tube to be formed is surrounded by an inductor placed at a distance which permits displacement and expansion of the tube on the mandrel under the action of pressure application means. The inductor carries a medium-frequency current which is maintained at a constant value during the forming operation in order to permit controlled annealing and plastic deformation of the tube.