Abstract: A pair of slit type horizontal fin rolls (18) and a pair of vertical side rolls (19) having such a shape as having the conventional vertical side roll (19) formed by contracting its center portion are utilized, and due to the construction in which one set of each horizontal fin roll (18) and vertical side roll (19) adjustable horizontally, the depressing force is not applied to the material, and since the edge is restrained and shifted widthwise only with the horizontal force of the vertical side rolls (19) rotating freely, threading can be conducted very smoothly irrespective of the sectional shape of the material after break down, and even if the material size is changed, the threading can be conducted very smoothly without adjusting the roll position as strictly as in the past.

Abstract: An invention is directed to a method and an installation for producing a hot-rolled steel strip from continuously cast primary material in consecutive work steps, wherein the primary material is brought to hot rolling temperature after solidification and is inserted into a rolling mill for rolling out into a finished strip, wherein the primary material is coiled after reaching the hot rolling temperature, is stored intermediately in a rotary hearth furnace, and is recalled, as needed, uncoiled and rolled out to form a finished strip, the intermediate storage being effected immediately prior to entering the finishing train, the coils being preferably stored intermediately in a horizontal position and with a horizontal coiling axis, a subsequent heating being effectable during the intermediate storage.

Abstract: A bent pipe is made of a metal strip having one edge in a straight line and the other edge in a curved line by winding it helically. A double fold and a single fold are formed along the straight edge and the curved edge, respectively. Then the metal strip is wound helically so that the narrow portions will be in juxtaposition with one another.

Abstract: A locking nut is provided by forming a straight cylindrical bore through a body, forming a tap with uniform teeth, the tips of which taper at a shallow angle toward one end of the tap, and tapping said bore with said tap so as to produce a thread having a pitch diameter and a root diameter which taper from one of the thread to the other, and a crest which is of constant diameter and increasingly truncated from one end to the other, said thread at said one end having substantially a full profile.

Abstract: An improved jig assembly for a die in the form of a supporting body member having a cavity receiving a die and wedge secured against vertical, back-and-forth and sideways movements with respect to the body member.

Abstract: A device for making a doubled-walled pipe having a wear-resistant internal pipe and a shock-resistant external pipe. The internal pipe is prefabricated. The external pipe is made from an initial pre-curved metal sheet. The shaping of the external pipe around the internal pipe is effected by means of tools which are pressed against the metal sheet. The parts of the tools are placed directly on the metal sheet on at least three lines distributed around the circumference and extending longitudinally over the length of the sheet. Using the parts of the tools, a clamping force is applied to the metal sheet perpendicularly or parallel to the edge of the metal sheet which is placed around the internal pipe to form the doubled-walled pipe.

Abstract: A bending machine comprising a feed mechanism and a bending assembly mounted on a base block for bending an elongate workpiece such as a pipe or the like. The feed mechanism includes a member for holding a rear portion of the workpiece, and the bending assembly includes a plurality of dies for bending a forward portion of the workpiece. The disclosed bending machine further comprises a first actuator provided between the bending assembly and the base block for moving the bending assembly on a bending plane, and a second actuator between the feed mechanism and the base block for moving the feed mechanism along a rotational axis of the dies.

Abstract: In a coiler arrangement having a housing and a mandrel penetrating the housing, rolling stock to be wound on and off the mandrel is conveyable from a roller table guiding the rolling stock through an opening of the housing to the mandrel by a pivot flap extending from the roller table to the vicinity of the mandrel and movable by a pivot drive. In order to be able to close the opening of the housing almost entirely during the coiling procedure, the pivot mounting of the pivot flap is realized on the periphery of the housing at a distance from the roller table, i.e., at a distance from the roller way formed by the table rollers. The pivot flap, with its free end, is pivotable into the roller way and, vice versa, is pivotable away from the roller way by closing the housing. At least one flap part is provided to extend the pivot flap in the direction opposite to its free end. The end of the flap part facing away from the pivot axis is pivotable from the region of the mandrel to the housing and vice versa.

Abstract: H-shaped steel products having substantially a constant web height are efficiently manufactured from workpieces after breakdown rolling by using a particular universal rolling mill comprising a pair of width variable horizontal rolls and a pair of vertical rolls in rough universal rolling and/or finish universal rolling stages without arrangement of rolls in the same size series having different flange thicknesses.

Abstract: A monitor is provided for measuring and controlling the strain rate of a blank during forming. A light source directs light against the blank and a video camera is positioned and focused to view the light reflected from the blank while it is being formed. A video monitor and an image processor receive the signal from the camera. This signal is used to determine the strain rate based upon the dimensional change in reference marks on the blank. The image processor provides an output signal which can be used to control the strain rate in accordance with a predetermined strain rate profile for the particular part being formed.

Abstract: A billet is successively cold worked into a product such as a countershaft, an outer race for a constant-velocity joint, or the like by forming a chemically converted lubricating coating on a surface of the billet, forging the billet into an intermediate product at a temperature below a transformation temperature of the billet, covering a surface of said intermediate product with lubricating oil in a die cavity in a die assembly, and forging the intermdiate product at a temperature below the transformation temperature and before the intermediate product gains a predetermined hardness due to age hardening resulting from the first forging step.

Abstract: A method of producing an electric-welded pipe by continuously shaping a steel sheet into a tubular form in a hot condition is disclosed, which is characterized by employing a forming roll arrangement of the constant pass-line type in combination with the downward bending system.

Abstract: A method of pre-processing a stainless steel strip to be cold-processed comprising the steps of: annealing and pickling the stainless steel strip after completing hot rolling; applying liquid lubricant with a thickness of 1 .mu.m or less to the surfaces of rolls before the rolls come into contact with the stainless steel strip; and rolling the stainless steel strip at a reduction ratio exceeding 5%. An apparatus for pre-processing a stainless steel to be cold-rolled comprising: annealing and picking means having a mechanical descaling device and a pickling device; rolling means consisting of rolls arranged in two or more stages; and means capable of applying liquid lubricant in a thin layer to a work roll of the rolling means.

Abstract: A system for processing steel strips in a hot strip mill includes an apparatus and method for removing the oxide layer in the finishing mill process such that the final thickness of the oxide layer is much less than previously possible. In order to reduce the thickness of the oxide layer, the invention provides for the removal of oxide scales from the surface of the steel strips at a distance in front of the working rolls of the finishing mill that minimizes the time the strip is exposed to ambient conditions after it is descaled and before it is received between the pair of working rolls. By minimizing this exposure time, the thickness of the oxide layers in the finished strips is substantially reduced.

Abstract: A method and an arrangement for controlling the thicknesses of webs and flanges of beam sections in universal rolling mill stands. A gage-meter circuit is provided for each roll of the universal rolling mill stand. In order to maintain a certain ratio of web elongation to flange elongation, the gage-meter circuits are coupled to each other for a mutual influencing. The adjustment can be effected in dependence on a rolling schedule.

Abstract: A method for cleaning waste particles from the die surfaces of a die press includes providing a blank of material with adhesive layers on both surfaces of the blank; conforming the blank to have a shape corresponding to at least one of the die surface of the die press for contacting at least one of the adhesive layers with waste particles on the die surfaces and thereafter removing the blank from the die surface to separate waste particles therefrom. Apparatus for practicing the method includes a die press with opposed die and tooling components and a press ram for positioning the die and tooling components in a cleaning gap relationship; the press is periodically positioned to receive the blank with cleaning medium thereon in the press throat where the blank covers the press dies to trap waste particles on the surface of the dies during normal press operations and for removing such waste particles when the blank is removed from the press.

Abstract: The apparatus of the present invention includes an externally threaded spindle to which one end of a thin walled metal tube is detachably secured. The spindle is rotated to wind the tube into the external thread, thereby producing a helix. As the tube is wound onto the spindle, it is pressed into the thread grooves by an auxiliary roller.

Abstract: A tool is described for assembling a length of sealing strip onto a mounting flange around a door opening in a motor vehicle. The strip has a channel-shaped gripping part whose walls are initially splayed apart so that it is an easy fit onto the flange. It carries a tubular sealing part. The tool comprises a roller which engages the outside of the base of the channel of the gripping part and a perpendicularly mounted roller which engages the outside of the tubular sealing part of the strip and, via this sealing part which it compresses, exerts a side force on the corresponding wide wall of the channel of the gripping part. A flange rigid with the roller engaging the gripping part itself engages the opposite side wall of the gripping part. The two rollers may or may not be geared together and are driven via a flexible drive shaft by a motor. The tool thus travels along the length of the sealing strip which is drawn off a coil or other supply.

Abstract: A method and apparatus for manufacturing anchor bolts to be fixed on concrete structures, with the method comprising preliminarily heading a steel rod to form at an upper end thereof, a head having a tapered surface gradually tapering downwardly from the upper end and decreasing in diameter; forming the mail screw at the other end of rod by thread-rolling and simultaneously rolling a part adjacent to the head to form a rod-portion of a reduced diameter by gradually displacing a surface layer of the rod-portion inwardly and outwardly to give rise to an inner and outer transient swells respectively forming a stopper a tapered portion merging into the tapered surface of head; and loosely fitting and expansible sleeve on the rod-portion of reduced diameter, with the sleeve being made by die-cutting and bending a metal plate into a cylindrical shape of an outer diameter substantially equal to outer diameter of the screw.

Abstract: The instant invention is an improvement on a method of making wire coils comprising the steps of rolling a length of wire having a leading end and a trailing end and displacing the wire in a longitudinal travel direction and coiling the wire into succeeding overlapping loops and depositing same onto an upstream conveyor. The loops are transferred from the upstream conveyor to a downstream conveyor and are deposited from the downstream conveyor onto a centering device to form a coil thereon. The downstream conveyor is driven to move the loops at a generally constant slow transport speed but the upstream conveyor is driven to move the loops at a substantially faster transport speed when loops of a portion of the wire having one of the ends are being deposited on the upstream conveyor. Otherwise the upstream conveyor is driven at the same slow speed as the downstream conveyor so that the loops of the end portion will be spaced more in the travel direction than the other loops of the wire.