Abstract: A pressurizable tool adapted for expanding a close-fitting sleeve into a tube in a tubesheet. The tool includes a housing containing an axially movable piston and a forward reduced diameter portion and having an elastic expander unit for inserting into the sleeve and tube in a tubesheet. The expander unit consists of at least two elastic rings composed of a polyurethane elastomer material and each having a chamfer provided at the outer edge of the unit forward and rear faces. By pressurizing a port at the housing front end, the piston is moved rearwardly to axially compress and expand the expander rings radially outwardly sufficiently to expand the sleeve firmly into the tube and provide a pressure tight seal therebetween. Following such expansion of the sleeve, the piston is pressurized and moved forward to release the compression on the expander unit rings, so that the tool can be easily withdrawn from the expanded sleeve and tube and inserted into another sleeve and tube for repeated usage.

Abstract: A fastener member and method of formation are provided wherein a bolt and nut are formed from a block of resin-impregnated fibers woven in a first, second and third plane each perpendicular to the other wherein the fibers in the first plane extend continuously and longitudinally through the fastener member and the fibers in the second and third plane extend to form the peaks and valleys of the helical thread.

Abstract: A method and a device for the spiral winding of tapes for the continuous production of tubes without a core and having an angular cross-sectional area. A tape is guided centripetally during each bending process along a convexly curved conducting surface situated in the region of the tube being formed, the intake side of which conducting surface is located at the feed level. The centripetal guiding of the tape is suspended when the conducting surface reaches the outlet side for forming the excluding level segment of the tape.

Abstract: A gas burner includes a burner tube which has on one side a row of burner nozzles aimed against a surface to be heated. In the interior of the burner tube, at least one slider is arranged which can be moved from outside the burner tube along the tube and by means of which the end burners of the row of burner nozzles can be shut off from the gas supply which is supplied the center of the burner tube, so that the row of the burner nozzles can be adapted to the width of the surface to be heated, e.g., to the width of a web when the burner tube is used to heat a hollow roll used to treat a web.

Abstract: In an arrangement for coiling metal strip on a downcoiler, the strip is directed to the downcoiler by a pair of pinch rolls and one or both of the rolls are used to steer the strip to a desired position on the mandrel so that a coil with tidy vertical sides is formed on the mandrel. One roll of the pair of pinch rolls may be skewed with respect to the other roll or both rolls may be skewed to the direction of travel of the strip material.

Abstract: A process for making self-threading screw fasteners wherein only the cutting portions of the tip of the fasteners are hardened. The unhardened portions of the fastener remain ductile and are not subject to hydrogen embrittlement during subsequent plating to improve corrosion resistance. The process preferably comprises applying a radiation curable plastic coating over the drill tip followed by plating of a thin (minimum 0.0005 inch, 0.013 mm) layer of copper. The cured coating is then removed leaving an unplated tip. The screw is then subjected to a hardening process, wherein only the portions of the screw without the copper layer are hardened. The screw may then be plated conventionally with a corrosion resistant metal. The invention is further directed to the product of the process. A second embodiment for making screws suitable for extreme corrosion resistance is also described.

Abstract: A process is disclosed for producing a tungsten heavy alloy sheet which involves rolling a starting slab consisting essentially of tungsten heavy alloy wherein the tungsten content is from greater than 75% to 93% by weight tungsten by passing the slab one or more times through a rolling mill at a temperature of from 700.degree. C. to 900.degree. C. to reduce the height of the slab by no greater than 10% per pass to a total reduction in height of from 15% to 25%, heating the resulting slab from the first series at a temperature of 1000.degree. C. to 1200.degree. C. for a sufficient time to anneal the matrix of the slab, subjecting the resulting first time annealed slab to a second series of rolling operations by passing the first time annealed slab one or more times through a rolling mill at a temperature of 700.degree. C. to 900.degree. C.

Abstract: A continuous-acting take-up, coiling, cut-off and spooling machine is adapted for use with continuously producing metal casting equipment that casts metal rod or strip stock at a constant rate, and which produces the cast rod or strip stock at a relatively constant velocity. The machine coils, cuts-off, temporarily accumulates and spools or packages determinate lengths of the rod or strip stock formed by the casting apparatus. Driven rollers receive the leading end of the rod or strip stock. The rod or strip stock is cut to predetermined, desired lengths while still in motion so as to not disturb the feed velocity. Free-wheeling rollers forcibly impart a slight curvature and simultaneous axial displacement to the rod or strip stock along its length, forming coils or convolutions of helical configuration, which are deposited by gravity, over a turnably driven reel carried on a tiltable turntable.

Abstract: A method for preventing the camber of a two-layered clad metal sheet having a base layer and a covering layer of different metals which exhibit different amounts of thermal contraction. The method comprises developing a temperature difference .DELTA. T expressed by the following formula between the base layer and the covering layer during a hot levelling, by providing a greater cooling effect before or during levelling to the layer which exhibits the greater thermal contraction than to the layer which exhibits the smaller thermal contraction:.DELTA.T=f (.DELTA..alpha., .alpha., a, To)where,.DELTA..alpha.: the difference in thermal expansion coefficient between both metalsa: the clad ratio (ratio of covering layer thickness to total sheet thickness)To: hot leveller inlet temperature (.degree.C.).alpha.: mean thermal expansion coefficient of both metals.

Abstract: A rolling mill laying head has a first tubular shaft mounted on first bearings for rotation relative to a stationary housing structure. A second hollow shaft carrying a three dimensionally curved laying pipe is mounted on second bearings for rotation relative to the first hollow shaft. Both hollow shafts are rotatably driven in the same direction at different speeds.

Abstract: A self-plugging blind fastener of the break-stem type, is suitable for fastening apertured sheets together, and comprises a headed tubular body and an elongate stem disposed in the bore of the body. The stem comprises a plug, and a stem-tail connected to the plug by a breakneck which is concealed by overlapping lips. The plug has a stop face, and an annular locking groove between the breakneck and the stop face. The body has a deformable locking collar upstanding above an adjacent region of the upper surface of the head. The diameter of the bore reduces, to provide a stop face and a locking region of smaller diameter, within the head. The fastener is set by pulling the plug into the bore until the stop faces meet, to form a blind head, and then deforming the collar to force the body to bulge into the locking groove of the plug.

Abstract: Tube bending apparatus in which a tube is clamped between a U-shaped bend die and a cooperating pressure die, the pressure die being advanced in a linear direction as the bend die is rotated, a tube groove in each of the dies embracing diametrically opposite sides of the tube. The tube groove on the bend die is of generally U-shaped configuration having a semi-circular bend section and opposite sides extending in tangential directions to define tangential grooves along opposite sides of the bend die, the cross-sectional radii of curvature of the tube groove along the bend section and tangential sections are closely controlled to impart some temporary distortion to the tube which will resist wrinkling or collapse. Similarly, the tube groove on the pressure die has cross-sectional radii of curvature corresponding to those of the bend section of the bend die in order to cooperate with the bend die.

Abstract: The invention relates to the pretreatment of ductile non-ferrous metal to be deformed in a continuous plastic deforming device (20) in which the surface parts of the metal to be deformed do not substantially form surface parts of the metal after said deformation. Known methods of pretreatment include scaling off of thin surface layers and pickling e.g. in baths and coiling or storing the metal thereafter before feeding to the deforming device. Such methods have disadvantages in view of energy, waste of material and, in many cases, in still having some surface contamination on the metal entering the deforming device. To avoid such disadvantages, the invention proposes to spray the metal with a deoxidation and cleaning agent in one throughgoing operation directly while it is moving to the deforming device and continuously and sychronously therewith. Spraying is done by directing forceful jets of the liquid onto the moving metal surface.

Abstract: An arrangement for winding material onto a coiler drum along a passline of a hot reversing mill comprising an apparatus having two pivotal arms mounted on a common shaft and movable in a different arcuate path toward and away from the coiler drum. Rollers at the end of the arms tightly enwrap the material around the drum when the arms are positioned against the drum as the material is being underwound onto the drum. The roller of one of the arms may act as a deflector roller when positioned away from the drum as the material is being overwound onto the drum. The other arm consists of two wrapper rollers on a pivotal mounting for their proper orientation around the drum and for flat passes of the material through the mill. This other arm is positioned away from the drum below the passline to allow a retractable table roll assembly consisting of a plurality of table rolls to be positioned in the passline for supporting the material.

Abstract: A bend arm assembly pivotable about a given axis of a bending machine and including a clamp die mechanism with a clamp die for coaction with a rotary bend die for clamping a workpiece for bending, the bend arm assembly including the clamp die mechanism then pivoting through the desired bend angle, as a unit, about the axis of the bend die. The bend arm assembly includes a back plate, with first and second guide slots, with the clamp die assembly mounted on the end of a clamp die block, which has laterally protruding guide bolts extending into the guide slots. A cam plate is secured to the clamp die block in depending relation, and is provided with a cam slot. A hydraulic cylinder driven cam actuator arm assembly includes interconnected parallel arms, which pivot about an axis, which is pivotally coupled to the structure about which the bend die pivots, with a cam follower rod extending through the cam slot.

Abstract: An electric bend head for bending tubes includes a frame mounting a gear box housing with a rotatable main shaft extending through the housing. A secondary shaft coaxial of the main shaft is journaled within the housing and projects therefrom. A rotatable worm gear within the housing is coaxially mounted upon the secondary shaft and a worm drive gear is journaled upon the housing and in mesh with the worm gear. A variable speed reversible electric motor upon the frame has a main drive shaft, and a transmission interconnects the drive shaft and the worm drive gear. A secondary drive plate is mounted the secondary shaft and a main drive plate is spaced from the secondary plate and mounted upon the main shaft. A bend die of semicircular shape, having an outwardly opening channel, is axially mounted upon the main plate.

Abstract: A curved pipe manufacturing method comprising steps of inserting a mandrel attached to one side of a movable block so as to be inserted into and to be pulled out from a curved cavity of a circular arc formed in a fixed die and having an entrance and an exit into the curved cavity through the exit thereof, forming a curved pipe by pressing a work, namely, a straight pipe, with a pressing rod through the entrance of the curved cavity into a curved space defined by the surface of the curved cavity and the mandrel in the shape of a curved pipe to be manufactured, turning the movable block to retract the mandrel slightly relative to a curved portion of the work after pressing the work into the curved space by a predetermined length to mitigate the pressure of contact of the curved portion of the work with the mandrel, restarting pressing the work into the curved space to complete a curved pipe, turning the movable block to pull out the mandrel from the curved pipe formed in the curved space, and further turning th

Abstract: A bead former (14) has a gripping mechanism (90,92) for gripping a leading end (106) of a bead ribbon (12) at a position recessed in the surface (18) of the former (14) during the initial rotation of the former (14). The gripping mechanism (90,92) has a seat member (92) movable radially outward of the former (14) into a supporting position at the surface (18) of the former (14) after releasing the leading end (106) for supporting the leading end (106) during the latter rotation of the former (14). A pressure roller (20) is rotatably supported in a guide cage (54) mounted on a dual arm (22,48) having a dual actuation system (34,60) for moving the guide cage (54) and pressure roller (20) into position for guiding and compacting the convolutions of bead ribbon (12) wrapped around the former (14) and for providing a high pressure force to crimp the splice area (124 ) of the bead (16).

Abstract: An apparatus and method for continuously manufacturing optical fiber cable in which optical fiber is encased by an hermetically sealed homogeneous metal tube formed from flat metal strip. A first assembly of mating rollers having successively different shapes forms the flat metal strip into a partially formed tube having a longitudinal gap. Optical fiber is guided through the gap to lie within the partially formed tube. The tube is then closed by a second assembly of mating rollers having successively different shapes. A laser beam is used to weld the seam closed without filler metal and without heat shielding between the seam and the optical fiber. The finished tubing with optical fiber therein is sunk by being drawn through wire dies to reduce the diameter. A wheel draws the tubing through the apparatus at constant speed to effect a uniform weld line.

Abstract: A transmission is disclosed for rotating the work supporting chuck assembly of a power driven threading machine at low and high speeds. The transmission includes a sun gear, a ring gear coaxial with the sun gear and axially shiftable between first and second positions relative to the sun gear and to a fixed clutch component, and a plurality of planet gears between the sun gear and ring gear. The sun gear is motor driven to provide the transmission input, and the planet gears are connected to and drive an output sprocket wheel drivingly connected to the chuck assembly. The first position of the ring gear provides clutched interengagement thereof with the sun gear for rotation therewith, whereby the planet gears rotate therewith to rotate the output sprocket wheel at a first speed equal to the speed of rotation of the sun gear.