Abstract: A method of forming coil springs by means of a single forming tool comprising the steps of bending a wire feed from a quill by applying a forming surface of the tip of a forming tool to the wire fed, forming a straight portion be separating the forming surface from the wire, changing the direction of the forming surface by rotating the forming tool about the axis of the quill, and again applying the forming surface to the wire to bend it in a different direction. Subsequently, these steps are repeated to form a coil spring having hook portions and a coiled portion of predetermined configuration and size. In accordance with the present invention, since a single tool is used for a variety of tools, a simplified apparatus can be provided.

Abstract: A method of making locking threaded fasteners having on the threaded surfaces thereof locking patch material formed by the accumulation of fused thermoplastic resin particles. The fasteners are advanced through a heating zone followed by an application zone. The fasteners are heated while in the heating zone to a temperature sufficient to fuse thermoplastic resin particles received on the threaded surfaces in the application zone. Thermoplastic resin particles are applied to the fasteners in the application zone by a mechanical propelling device which comprises a rotatable slinger that propels the particles by centrifugal force against the heated threaded surfaces. The thermoplastic resin particles build up on the threaded surfaces and fuse into locking patches. Apparatus for carrying out the method is also disclosed.

Abstract: A pipe bending machine having a support, a bending template, a clamping jaw displaceable relative to the bending template, a clamping member for a pipe, and clamping bodies each provided in a respective one of the bending templates and the clamping jaw and movable relative to one another to an operative position, one of the clamping bodies havign a clamping surface which is provided with different contours for portions of a pipe to be clamped, while the other of the clamping bodies being provided with a clamping surface having only one contour corresponding to the portion of the pipe to be clamped so that the portion of the pipe to be clamped is engaged over its whole surface at the respective side over an angular distance of 180.degree..

Abstract: A tapped hole produced in a metallic material by threading a preselected standard threaded fastener into an untapped hole formed in the material. The diameter of the hole to be formed is determined by using a formula that takes into account the hardness and thickness of the material to be tapped and the basic major diameter and pitch of the preselected threaded fastener to be used to tap the hole. This formula can only be used with threaded fasteners having threads of the Unified Thread Standard type. This formula is particularly useful in tapping a hole formed in a mounting strap of an electrical wiring device.

Abstract: An apparatus 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 along a convexly curved conducting surface situated in 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 process and die unit for fabricating stepped nails wherein a top portion of a blank is pressed into a rough slender tip portion at the first step of the process, and a shank portion of the blank is pressed in the second step of process so as to have threads on the peripheral surface thereof, and the rough slender tip portion is simultaneously pressed for correction so as to refine into a finished slender tip portion.

Abstract: In the wall ironing of a deep-drawn cylindrical body, two ironing ring die regions provide respectively immediately successive first and second thickness reduction phases which take place simultaneously with a relatively small reduction occurring in the first phase and a relatively large reduction occurring in the second phase. Lubricant is applied to the outer surface of the body via inlet between the two die regions. To achieve a high mount of reduction with low applied force, the annular space bounded by the contact regions of the body with said two die regions and the portion of the body located between said two contact regions is fluid-tightly sealed, apart from inlet or inlets for said lubricant, and said space is so shaped and the lubricant is applied through said inlet or inlets at such a pressure that at the second die region hydrodynamic lubrication of the body and die region is achieved.

Abstract: Direct softening heat treatment of rolled wire rods comprises the steps of:providing wire rods by hot- or warm-rolling, and immediately following rolling, coiling the rolled wire rods in an annealing furnace. Apparatus therefor comprises an annealing furnace provided with an externally or internally built coiler for rolled wire rods disposed adjacent to a rolling line of said wire rods, the coiler being disposed so as to directly receive the rolled wire rods.

Abstract: A wire coiling apparatus having a plurality of wire feeding spools, belts driving a wire coiling arbor, variable speed motors driving the belts and arbor, a lead screw moving the spools across the arbor feeding wire to be coiled on said arbor and a programmed computer coordinating the motors to determine the character of the coil produced.

Abstract: A screw cutter die head comprising an annular body portion, a ring member formed with several cam ridges and angularly movable relative thereto and several chasers held by said body member to be radially movable by engagement of a cam recess formed in each chaser with each of said cam ridges is in public knowledge. When it is necessary to process the work of far larger or smaller diameter in the known die head, the chasers must be exchanged with the others formed with the cam recess nearer to the cutting edges or more apart therefrom. The invention provides the chasers formed with a plurality of recesses and the ring member formed with the corresponding number of notches to be engaged with the latch for fixing it.

Abstract: The present invention is directed to a curved pipe manufacturing method comprising the steps of: inserting a curved mandrel into a curved cavity of a fixed die having an entrance opening and an exit opening, the curved mandrel being attached to the distal end of an ejecting rod; forming a curved pipe by pressing a work, with a present rod through the entrance opening of the curved cavity into a curved annular chamber defined by the surfaces of the curved cavity and the mandrel; turning the movable block in one direction so that an ejecting rod attached at its base end with the movable block and concentrically integrated with the mandrel, ejects the mandrel together with the curved pipe from the entrance opening of the fixed die; advancing a movable chuck provided outside the entrance opening for chucking only the curved pipe; turning the movable block to another direction opposite to the one direction so as to return only the mandrel into the curved cavity of the fixed die; and retracting the movable chuck fo

Abstract: A method for forming in a single step metal slugs of tantalum, niobium or a base alloy of one of these metals, by cold pressing. A lubricant film is either an oxide coating on the metal, into which a polytetrafluorethylene of low molecular weight is embedded, or it is a film of chlorotrifluorethylene. A metal slug is shaped by means of a hard-metal punch with a crowned bottom surface on its punch head and a rounded undercut in the area of the transition from the punch head to the punch shank.

Abstract: A method of stably effecting a rolling of a steel strip with deformed section by use of a continuous hot strip mill, said method comprising the steps of:providing an excess metal portion along each of opposite sides of a meterial to be rolled for simultaneously obtaining one or a plurality of deformed section portions; andproviding, on a roll for effecting said rolling and at a position corresponding to each of the excess metal portions, a hold portion constituted by a tilted surface placed in a contact-and-rolling relation to each of said excess metal portions so that a self-aligning function occurs in a rolled material itself.

Abstract: A curved pipe manufacturing method comprises the steps of: inserting a curved mandrel into a curved cavity of a fixed die having an entrance opening and an exit opening through the exit opening thereof, said cavity being formed in a circular arc and extending from the entrance opening to the exit opening thereof, said curved mandrel being attached to one side of a movable block; forming a curved pipe by pressing a work, with a presser rod through the entrance opening of the curved cavity into a curved space defined by the surface of the curved cavity and the mandrel; turning the movable block for extracting completely the curved pipe together with the mandrel from the exit opening of the curved cavity; inserting a retaining pin into a groove provided in the movable block for retaining a tip end of the curved pipe; and further turning the movable block so as to turn the mandrel while the curved pipe is restrained by the retaining pin so that the curved pipe is separated from the mandrel.

Abstract: A computer controlled wire coiling machine having three separately controllable motors for controlling wire feed, pitch tool operation and diameter tool operation. The machine includes a computer having a keyboard for setting predetermined parameters thereat regarding wire feed, spring pitch and spring diameter in constructing a predetermined spring. Three separate control signals are taken from the computer corresponding respectively to and for operating the three motors to thereby carry out the desired steps in forming the predetermined parameters that have been established.

Abstract: Plant for cutting to size rolled sections such as angle irons, channel sections, T-bars, window profiles, trackways for lifts or elevators and the like, and also rolled bars such as round and flat bars and the like, comprising a cooling plate (19), a feed line (10) on which the rolled sections or bars are loaded, a straightening machine (11) for straightening said rolled sections or bars and a shears (13) for cutting to size said rolled bars while they are moving, it further comprising a disk saw (16) for cutting to size said rolling sections.

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 witha 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: A coil box apparatus provided between a roughing roll and a finishing mill at a hot rolling mill so as to coil a rolled material transported from the roughing mill in order to make the temperature distribution of the rolled material more uniform, which is provided with a controller for computing a stand-by time of the coiled rolled material in a coil box on the basis of a condition of proceeding a rolling operation of an advanced rolled material at the finishing mill of the downstream side process, and predicting a temperature difference between the outermost first coiled layer and the inside coiled layers from the second coiled layer of the coiled rolled material after the lapse of the computed stand-by time with reference to information of the previously stored temperature drop at each part of the coiled rolled material, so that when the predicted value is larger than the reference value, the coiled rolled material is covered on the surface of the outermost first coiled layer thereof by coil covers formed o

Abstract: To obtain flat component strips from a cold-rolled metal strip inexpensively and with the minimum use of technical apparatus, slitting shears 5 are disposed between sets of tensioning drums 3, 4; 11, 12, more particularly between the inlet side set of tensioning drums 3, 4 and a straightening unit 6 of a stretch flattening apparatus for a metal strip 1. This arrangement of the slitting shears eliminates the additional stretch flattening of the component strips otherwise required after the metal strip itself has already been stretch flattened. The component strips between the two sets of tensioning drums 3, 4; 11, 12 also acquire the same length.

Abstract: This invention relates to plastic metal working. The apparatus embodying the invention, includes two parallel oppositely directed mandrels secured each by one end in a collet clamp and by the other end in a rotating sleeve, and two assemblies for winding springs from a respective wire onto the corresponding mandrel, these two assemblies being mounted on a common carriage to move lengthwise of the mandrels. Each spring winding assembly has a mechanism for setting the helic angle of the spring being wound.