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Patent Searching and Data


Matches 551 - 600 out of 8,925

Document Document Title
WO/1999/039851A1
A method of obtaining a circular cylinder member having excellent dimensional accuracy without requiring many machining hours and a high cost of production, comprising forming uniformly a large number of longitudinal grooves around the o...  
WO/1999/036206A1
The invention relates to a method for producing hollow bodies by means of cross-rolling. According to said method, a workpiece (4) rotating around a machine axis (3) of a forming machine is transformed into a hollow body by at least one ...  
WO/1999/034023A1
A continuous annealing furnace wherein high carbon bearing steel is subjected to spheroidizing annealing continuously, characterized in that the furnace comprises not less than two processing chambers having mutually different carburizin...  
WO/1999/032804A1
The invention reduces expenditure required to produce hollow cylindrical parts (5,20) with a toothed profile by means of the following process: at least one of the surfaces of a longitudinally extended semi-finished product (1) is provid...  
WO/1999/031557A1
A method for impressing holographic images (16) or holograms in the surface of metal objects such as aluminum cans. The surfaces of metal shims (12) and print rolls (10) bearing holograms are hardened as by coating them with thin amorpho...  
WO/1999/028070A1
A method of densifying a sintered powder metal article (2) by point contact (12).  
WO/1999/026785A1
Surface relief holograms (20) can be prepared directly in materials, such as aluminum or other hard metal substrates (30) without the need for preheating or other softening techniques. A hard holographic embossing shim (10) is prepared f...  
WO/1999/025500A1
Method for producing a metal strip which reduces the risk of the strip breaking over the course of a path, the strip being conveyed under stress in the strip direction and in which, in an upstream feed path of the metal strip, defects in...  
WO/1999/024191A1
A screw thread having a threadform comprising a ridge (21) rising from root (23) to crest (26) with the crest having two peaks (27, 28) separated by a through (29) the depth of which is less than the height of the ridge from root to cres...  
WO/1999/022890A1
The invention relates to a method and a device for producing a toothed wheel from a powder metal blank (1) which has been sintered and pressed with an overmeasure in the toothing area. Said blank is compacted in the area of the overmeasu...  
WO/1999/020416A1
A method of manufacturing a metal shaft having a fluid passage formed immediately under the surface of a metal shaft, comprising a preliminary step of forming thread grooves U-shaped in cross section in the surface of a circular column s...  
WO/1999/020415A1
The invention concerns a roll bending machine which, for rolling a ring-shaped part (10), comprises a forming mandrel (16), a forming wheel (16), a roll bending shell (19) corresponding to the final form required for the ring-shaped part...  
WO/1999/008009A1
A self-locking screw in which a deep slit is formed without requiring sophisticated machining techniques or skills, and of which the locking effect is enhanced because the flanks of the screw thread are easily deformed. A slit is cut int...  
WO/1999/007496A1
A pair of thread rolling dies (10, 12) for manufacturing self-piercing, self-tapping or gimlet-type screws (21) employ an off center rise and asymmetrical tip formation surfaces (54, 64) to enhance the slug removal at the tip (28) of the...  
WO/1999/003618A1
According to the invention, a press roller device (1) for moulding a grooved structure inside a tubular workpiece (7) has several press rollers (4, 5, 6), said press rollers rotating around a form tool (2) and being staggered axially in ...  
WO/1999/003617A1
A mill for producing axially symmetric parts which has a means (35, 36) for fixing the billet under process with a possibility of its rotating about its own axis, rolling rolls (1, 2, 3, 4), a working furnace (44) provided with openings ...  
WO/1998/058754A1
The invention relates to a method for producing a rack (5) for a rack-and-pinion steering in motor vehicles, which method consists of the following steps: a slug (18) for the rack (5) has a shape which differs from that of a regular cyli...  
WO/1998/055248A1
A double cup (2) for a tapered roller being has a concave intervening surface (28) between the small diameter ends of its tapered raceways (22). The cup (2) is produced by roll forming a tubular blank (40) at ambient temperature into a r...  
WO/1998/053937A1
The invention relates to a device and method for producing a one-piece vehicle wheel in which a substantially discoid, undercut-free blank is cast. Immediately after casting, the blank is transported to a pressure cylinder machine while ...  
WO/1998/053934A1
The invention relates to a flowturning device (1; 101) for producing an internal geared wheel (17) with inner toothing, one set of which is slanted. The workpiece (9) is held by a retaining member (16; 116) during shaping of the first in...  
WO/1998/051933A1
A fastener (20) is described having a body comprising a substantially parallel portion (12) with a head (13) at one end and a tapered portion (14) leading to a point (15) at the other end, and a helical formation (21) providing an edge (...  
WO/1998/051432A1
Deep rolling equipment for cold working fillet radii of annular undercuts (F, F') on opposite sides of crankshaft journals has pairs of jaws (42, 43) movable between an open position for receiving the crankshaft journals and a closed pos...  
WO/1998/048201A1
A sprocket permitting the use of existing chains and having a reduced weight. Specifically, a sprocket (2) comprising a sprocket body (4) and teeth (6) provided around the periphery of the sprocket body (4), wherein the teeth (6) are mad...  
WO/1998/032556A1
The invention relates to a method and a machine for producing, by combined chip-removal and forming, rings with an inner and outer profile, preferably made from tubing material, for producing ball and roll bearings or similar. This metho...  
WO/1998/020990A1
A blank (12') of high-ductility material is formed with closely spaced thin fins (14) using a forming tool (18) which is rotatable about a tool axis (L) and comprises a set of flat circular space-apart forming discs (19) centered on the ...  
WO/1998/018583A1
When a gear blank (2A) of sheet metal having preliminary root portions (23) and preliminary top portions (24) formed on the periphery thereof is clamped between a pair of rotating dies (401, 402), a shaping roller (301) is pressed agains...  
WO/1998/008646A1
A method for forming a toothed wheel which comprises the steps of providing a circular sheet metal blank of uniform thickness, cold forming an outer peripheral portion thereof into a thickened rim of uniform generally rectangular cross-s...  
WO/1998/006521A1
A process is disclosed for manufacturing a gear part with outer teeth from a metallic workpiece shaped as a circular blank or predrawing. The gear part has a hub surface with outward projecting teeth. The workpiece is flattened in its ci...  
WO/1998/006532A1
A method of forming vehicle wheel rims includes utilizing linear friction welding. A generally planar piece of metal material (20) is placed into a coil position with two ends (22, 24) in abutment. The abutting ends are oscillated or mov...  
WO1997048831A3  
WO/1998/005446A1
A method of molding a cylindrical portion of a central bore-carrying sheet metal according to the present invention is used when a cylindrical portion at an outer circumferential region of a base part of a boss-carrying sheet metal is mo...  
WO/1998/005447A1
The method of molding a cylindrical portion of a cylindrical material of a sheet metal according to the present invention comprises a method of pressing a cylindrical portion of a cylindrical material, which is fitted around a rotary mol...  
WO/1998/005448A1
This invention relates to a method of manufacturing a pulley of a sheet metal for V-belts without carrying out a cutting process which deteriorates the environment of a factory. A pulley (4) of a sheet metal for V-belts obtained by the m...  
WO/1998/003281A1
A process for forming a vehicle wheel wherein a wheel blank (53) having a wheel disc (11) and a cylindrical skirt (56) extending axially from an inboard surface of the wheel disc (11) is mounted upon a spinning machine (60) and the skirt...  
WO/1998/001246A1
A shaped article sheet metal suitable for piston parts, whose peripheral wall formed integral with a base plate is four or more times thicker in axial directions and two or more times thicker in radial directions than the base plate. A w...  
WO/1997/048831A2
The invention relates to plastic working of metals and alloys, predominantly low-plastic and hard-to-work ones, e.g., nickel-, titanium-, and iron-base high-temperature alloys, and producing billets for parts made by plastic working of s...  
WO/1997/048509A1
The invention relates to plastic metal working, more specifically to methods for producing parts of the disk- or shell-type having conical, hemispherical, and also combined parts, such as disk-and-shaft ones. The invention is instrumenta...  
WO/1997/047482A1
A vehicle wheel has a rim (10) and a disc (22) joined thereto. The rim has a groove (25) consisting of a frusto-conical surface (27) and a cylindrical surface (26) to receive mating portions (29, 28) formed on the outer periphery of the ...  
WO/1997/045213A1
The invention features a method for priming a hard metal surface (12), in particular bare or coated steel, characterised in that it consists of applying, continuously and with a determined pressure on the hard metal surface (12), a woven...  
WO/1997/045219A1
A powder metal gear wheel having a core density of at least 7.3 g/cc, and in one embodiment 7.4 to 7.6 g/cc and a hardened carburized surface. A method of manufacturing transmission gears comprises, sintering a powder metal blank to prod...  
WO/1997/041982A1
The invention relates to a process for ring rolling the teeth of bevel gears, preferably hypoid-toothed bevel gears, in a closed die, in which use is made of a pretreated blank of which the outline outside the shaping region of the profi...  
WO/1997/038821A1
A working machine such as a machine tool, a spinning machine, a press machine, etc., for executing cutting, plastic machining, etc. The machining efficiency and machining accuracy are improved by inclining a driving portion or shaft memb...  
WO/1997/036702A1
The present invention relates to a method for forming weakenings in a metal plate (8), comprising of: deforming the metal plate to a predetermined depth to form a weakening thinned portion along at least one line; and bending the metal p...  
WO/1997/027962A1
A thread rolling attachment includes a pair of opposed pivoting arms (4) each having a threading roll (2) attached to one end thereof. A wedge (12) is located between the other ends of the arms (4), and is linearly movable for controllin...  
WO/1997/023313A1
The invention relates to the machining of metals under pressure. The proposed mill comprises a base mount (1), a rolling stand (2) mounted on the base mount and provided with means (22) for the resilient unidirectional transformation of ...  
WO/1997/023314A1
A transfer device (54) for transferring fasteners (92) from a supply track to a deforming die at evenly spaced intervals. The transfer device includes an index wheel (58) mounted for rotation about a wheel axis (70) in a direction opposi...  
WO/1997/012710A1
The object of the invention is to improve a method of producing large annular workpieces, in particular annular bands for wear-resistant pressure rollers, by means of a hot-isostatic pressing process such that even larger annular workpie...  
WO/1997/012727A1
A method and apparatus for knurling a workpiece in which the knurl pattern has an oblique helix angle relative to the longitudinal axis of the cylindrical workpiece. Also disclosed is a method of molding a molded article with the knurled...  
WO/1997/011796A1
A deformed bar having knots and four ribs on its surface is produced by performing the final finish rolling by means of a two-roll rolling mill. Rolls R1, R2 of the two-roll rolling mill have a peripheral groove (3), knot grooves (2) and...  
WO/1997/009136A1
The present invention relates to a method for manufacturing a formed piece of aluminium or some other relatively soft metal. In accordance with the invention, a slice is cut from a rod of aluminium or some other raw-cast metal; the slice...  

Matches 551 - 600 out of 8,925