Abstract: Process and apparatus for making a flexible tube comprising a plurality of helicoidal metal members in side-by-side relation. In the process, metal strips, shaped to the desired configuration, are twisted around their longitudinal axes to helicoidal shape, the twisting being sufficient to cause the shape to be retained if the strip is released. Thereafter, the so-shaped strip is bent around an axis extending in the width direction of the strip by an amount sufficient to cause the strip to have a radius substantially equal to the tube radius. The strips are then laid up, side-by-side into a tube. The apparatus comprises a rotatable cage carrying bobbins having the strips thereon, two pairs of preshaping rollers to produce the twist and the bend mounted for rotation with the cage, a mold for laying up the helicoidal strips, a guide element for the strips intermediate the rollers and the mold and a take-up bobbin or drum for winding up the tube as it leaves the mold.

Abstract: The invention relates to an apparatus for bending structural metal rails, preferably rails for multi-glazed windows, and gives instructions for a bending unit (20) having two wringing heads (6) which can be displaced relative to the width of the rail, for in an open position to allow the infeed of rails (5) having various width, and in an attracted position to clamp a portion of the rail (5) for the bending thereof by turning the wringing heads (6).

Abstract: A method and apparatus for making a necked container are disclosed wherein a sheet material is formed into a generally cylindrical tubular member and the adjacent longitudinally extending edges of the sheet are butt welded. The welded tubular member is progressively necked-in over a dome-shaped surface of a single mandrel provided within the welded tubular member. The free end of the necked end portion of the tubular member is trimmed and curled to form a necked container body.

Abstract: A drive mechanism for the bend arm of bending apparatus wherein a drive motor has the drive shaft thereof generally parallel to the axis of pivoting of the bend arm assembly, and along a line at an angle to the feed direction of a tube. The drive shaft is directly coupled to a bell crank having first and second generally perpendicular arms. A like bell crank arrangement is formed in the bend arm and is driveably coupled to the bend arm pivot shaft with the bend arm bell crank in aligned relation to the drive motor bell crank. First and second generally identical rigid noncompliant link arms have the first ends thereof pivotally coupled to the free ends of the arms of the bend arm bell crank, with the other end thereof pivotally coupled to the free ends of the drive motor bell crank. The link arms are generally L-shaped, with the distal ends of the short legs thereof coupled to the bend arm bell crank, one of the ends above the crank and one below the crank.

Abstract: Elongated straight cylindrical metal rods are threaded along opposite end portions, and the cylindrical outer surface of the center portion of each rod is marked to form a visual indicator of the longitudinal center of the rod. The straight rods are successively inserted into a rod bending machine having a mandrel with a mark indicating the center plane of the bending operation. The mid-point mark on each rod is aligned with the center plane mark on the machine, and the rod is bent to form a precision U-bolt. Preferably, the mark identifying the center of each rod extends circumferentially around the metal rod and is formed by a stripe of color contrasting ink to provide a permanent mark which does not require rotating the rod to find the mark.

Abstract: A tube bender has multiple rotatable bend dies of differing radii and a pressure die engaging the outer surface of the trailing portion of the tube tangential to the bend. A drive for the pressure die is provided to move the pressure die parallel to the tangential tube portion during bending. The drive includes sensors for determining both the drive speed of the pressure die and the rotation rate of the bend die, a computer which converts the detected rotation rate into a center line speed for the tube, and a servomechanism which controls the drive structure so as to drive the pressure die at a speed which has a selected ratio to the tube center line speed.

Abstract: The present invention is directed to a method and apparatus for forming seam welded tubes in which the positions of cage rolls are adjusted in accordance with the thickness, substance and size of a material to be formed into a tube in a process for forming a tube blank for a seam-welded tube by using cage rolls.

Abstract: A roll cooling table (1) for steel pipes (3) having a group of interlocked castellated water-cooled rolls (5) which are located in a generally downwardly sloping plane at the entry side of the cooling table (1), and being situated adjacent to a sloping skid pan (11) of a kick-off table (6).

Abstract: A production method for a two-piece capped lug nut which consists of a nut and cap which is attached to the top. The top of the nut has a grooved, serrated or roughened surface and a protrusion for positioning. When the cap is positioned on the nut, the cap is correctly centered by the protrusion and at the same time, the flange portion of the cap is positioned over the grooved, serrated or roughened surface. Then the nut and the cap are welded under pressure together by running electrical current through them.

Abstract: A plurality of separate blanks or punchings can be continually processed by first cutting the strips into the dimensions needed for core punchings prior to thermal and magnetic annealing. Thereafter the cut punchings can be fed into the annealing line a conveyor in the sequence of one after another in series, alternatively side-by-side in parallel. The punchings will be flattened with rollers or a press during the stage of heating from room temperature to approximately 300.degree. C. The molten metals adhering to the laser-cut edges or burrs from the mechanical shear can be mechanically removed at this point by brushing. The strips may then be thermally and magnetically annealed in the soaking area. In one embodiment, the temperature may be 400.degree. C. .+-.20.degree. C. for 2605-S2 Metglas material and 360.degree. C. .+-.10.degree. C. for 2605S-C Metglas material with a field of 10 Oe in a non-oxidizing environment.

Abstract: A roll cooling device for a rolling mill having rolls comprises cooling water guide plates each having a curved surface along a circumferential direction of rolls, the cooling water guide plates being provided close to the rolls, cooling water supply headers for supplying cooling water to cooling water passages defined by the cooling water guide plate and the rolls, water discharge headers for discharging the cooling water, supplied by the water supply headers, from the cooling water passages, support members supporting the cooling water guide plates, and curvature adjusting members for changing curvature of the guide plates in accordance with a diameter of the rolls. A thickness of the guide plate is increased from each edge portion to a central portion of the guide plate in the circumferential direction of the roll. In the case where the roll diameter is largely changed, the clearance between the guide plate and the roll is kept suitably, thereby sufficiently cool the rolls.

Abstract: Apparatus for use in cooling and/or drying or cleaning elongate material, such as drawn wire, tube or strip material, the apparatus comprising a chamber, which may be formed at least in part by a flexible tube, having an inlet and an outlet through which the material enters and leaves the chamber, and the chamber is connected via an outlet passage to a device which creates a sub-atmospheric pressure within the chamber. The sub-atmospheric pressure lowers the evaporation temperature of the cooling liquid which is on the surface of the material which evaporates and cools the material and the sub-atmospheric pressure causes air to flow into the chamber around the material in the region of the outlet and this airflow is at high velocity and wipes the material. The apparatus is preferably located on the end of a structure in which a drawing die is housed.

Abstract: The device serves to control the desired lifting and pressure-containing movements of strip pressure rolls for the reels which serve to store hot rolled strip. These reels have a rotating mandrel. The pressure rolls are actuated by piston and cylinder units for positioning the rolls electro-hydraulically in conformity with signals which indicate the relative position of the leading strip edge which rotates with the mandrel. The positioning of the roll, by the lifting and pressure-contacting movements, is effectd by position control with subordinated pressure control in a closed-circuit position control loop and a closed-circuit pressure control loop, by input of a setpoint position value which corresponds to the respectively prevailing pressure-contacting and lifting position of the pressure rolls, and by establishment of limited setpoint pressure values for both functions or directions of movement.

Abstract: A device for making springs from wire comprises two driven mandrels located arallel to each other and adapted for winding springs from wire and a carriage feeding wire onto each of these mandrels alternatively while reciprocating along the ways from one extreme position to the other, and backwards.

Abstract: A bi-metallic screw fastener blank for a self drilling and tapping screw and a process for making it are disclosed. The screw blank comprises a member made of a first material and has a head member and a shank member adjacent to the head to which is affixed by welding means a slug member made of a second hardenable material. After welding to the head member, the hardenable member leaves an annular groove at the weld interface having a diameter equal to the defined root diameter of the screw.

Abstract: A roll machine for straightening a brake shoe comprising a main roller and a dependent roll. The main roll has a groove into which the web of the brake shoe is fit and flanges slightly shorter than the thickness of the brake shoe film. The freely rotating dependent roll is hydraulically pressed against the turning main roll and brake shoe. A replaceable block is disposed between the hydraulic piston rod and the support of the dependent roll and a roller pin perpendicular to axis of the two rolls is placed in corresponding grooves of the block and dependent roll support.

Abstract: A modular system for producing triple-necked open ended containers includes three substantially identical necking modules each having the same frame and identical rotatable turrets which have a plurality of identical necking stations around the periphery. Each necking station includes an annular necking die and a platform and punch which are cam-operated to move towards and away from each other and are maintained in engagement with the cams by pressurized fluid. Each necking station also has a container pressurizing means in the form of an annular chamber which acts as a holding chamber prior to transmitting the pressurized fluid into the container.

Abstract: A precision bending apparatus is provided for precisely bending tubes. The precision bending apparatus includes a preprogrammed bender for placing a selected sequence of bends in the tube. The apparatus further includes a position sensing means for sensing the precise position of locations on the bent portion of the tube. A control means is in communication with both the position sensing means and the bender, and is operative to alter the program of the bender based on data sensed by the position sensing means.

Abstract: A process and an installation for protecting a solid metal against oxidation during a rolling operation. This installation comprises inert atmosphere enclosures supplied with an inert gas and enclosing the waiting table, in the case where the rolling is carried out by means of a strip train, or located on each side of pressure rolls around blanks to be rolled, when the rolling is carried out by means of a planetary rolling mill.

Abstract: A method and apparatus for bending a heat exchanger coil, and particularly a fin-on-tube coil, is provided which reduce pressure on the coil at a bending location to prevent damage to the fins and coil by effecting relative movement between a support bed for the coil, defining a coil plane, and a rotating mandrel, in a direction perpendicular to the coil plane during approximately the first 10.degree. of rotation of the mandrel. Such relative movement can be accomplished by either moving the support bed or by moving the rotational axis of the mandrel.