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JP3379365B2 |
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JP3380423B2 |
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JP3378849B2 |
To provide a method of machining of a pipe end and a method of forming a bevel by assembly, by which method a precise bevel is formed. In a machining process of the pipe end the end face of the pipe end is cut and formed in a state that ...
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JP3374963B2 |
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JP3373766B2 |
To control vertical camber which is generated by rolling a rail with light force after roller straightening at low cost. In light-force rolling for pressurizing the rail in the vertical direction after roller straightening in manufacture...
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JP3373245B2 |
PURPOSE: To provide a bent pipe, in which the radius of curvature is the pipe diameter or smaller and the curvature is uniform and the roundness in the cross section of a passage is high, in a low cost and its manufacturing method. CONST...
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JP3370884B2 |
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JP3362021B2 |
To readily perform a repairing work for a deformed portion of a rim without any adverse effects given by a rim shape of a wheel or a kind of the wheel, and to enhance the precision of the repairing work and the simplification of the appa...
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JP3360240B2 |
To obtain a curvature deformation whose erection strength and radius of curvature are large by performing deformation working, making it correspond to the corrugated shapes of other parts, to the bending part of a side wall to a trough l...
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JP3354963B2 |
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JP2002346634A |
To provide a method, a machine and a unit for straightening shape steel, which achieves a mechanical straightening of H-steel or T-steel, providing reduction in the straightening time and an accurate and consistent straightening. A pair ...
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JP3349923B2 |
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JP3347573B2 |
A method for continuously producing pipes, each having a polygon-shaped closed cross-section taken perpendicularly to the feeding direction of a strip of metal, which are free from brittleness caused by metal fatigue, and have good preci...
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JP3342953B2 |
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JP3343835B2 |
PURPOSE: To eliminate part of work processes by simultaneously executing strain straightening and trimming after a product requiring precision is cast. CONSTITUTION: A strain straightening device 3 is provided in a trimming press die 2, ...
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JP3341610B2 |
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JP3341577B2 |
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JP3340680B2 |
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JP3342151B2 |
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JP3341654B2 |
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JP3340039B2 |
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JP2002303332A |
To improve accuracy of spline shape so that an axis part of constant velocity joint can be easily fitted even if a central hole at a hub wheel is deformed during a calking process.In a cylindrical hub wheel 1 in which a flange 11 oriente...
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JP3332447B2 |
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JP2002285283A |
To provide a superhigh strength steel pipe for a linepipe having high speed ductile fracture characteristics, which has tensile strength of ≥900 MPa, and is widely usable as a linepipe for transporting natural gas and crude oil, and a ...
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JP2002282944A |
To provide a roller leveler capable of stably flatten an H-shaped steel without causing a local high reduction to a web and a flange.The outer sides 3a of the flange 3 are repeatedly compressed vertically and alternately to be flattened ...
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JP2002282945A |
To provide a roller leveler capable of stably flatten an H-shaped steel without causing a local high reduction to a web and a flange.The outer sides 3a of the flange 3 are repeatedly compressed vertically and alternately to be flattened ...
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JP2002282943A |
To provide a compact device for rectifying a H-section steel capable of efficiently and easily rectifying a curvature in the direction of length of a H-section steel.The device comprises an inside frame 9 to which a pair of rolling rolls...
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JP3330818B2 |
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JP3328387B2 |
PURPOSE: To provide a method by which bent and roundness of a steel tube are accurately and simultaneously corrected at the time of expanding the steel tube of UO steel tube, etc. CONSTITUTION: In a method for correcting bent and roundne...
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JP3322588B2 |
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JP3321002B2 |
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JP2002526263A |
A method and apparatus for reshaping a container body (e.g., a metal, drawn and ironed container body) utilizing a floating mechanism for imparting an axial load is disclosed. In one embodiment, a container may have a substantially cylin...
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JP2002227959A |
To provide a method for accuracy correction of a feeding screw shaft which can correct the lead error of a screw shaft by a simple technique.A nut member 20 is rotatably and threadably engaged with a screw shaft 4 of which one end and th...
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JP2002224751A |
To increase productivity with better work efficiency by achieving oval forming and square forming in one process in square forming of a circular tube without turning a work upside down.A pressing force is applied to a circular tube 40 fr...
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JP2002224750A |
To provide a correction method capable of easily adjusting a spiral grooved lead formed at an outer peripheral surface of a rodlike body within tolerance.Both ends of a ball screw (work) 1, which is a rodlike body, are held by a fixed ch...
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JP3311211B2 |
To provide the straightening equipment for a square steel tube which straightens easily and simply the deformation at the top and part or the rear end part. Both end parts of a square steel tube 3 which is hot-formed in a hot forming mil...
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JP3311009B2 |
PURPOSE: To improve the repeated usability of a cylindrical member by uniformly expanding the deformed part of the cylindrical body towards the outer circumference while controlling a corrective piece to expand the diameter. CONSTITUTION...
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JP3311714B2 |
To provide a disk wheel correcting device low in cost and small in size by simplifying its configuration. The disk wheel correcting device comprises a table 2 with an aluminum wheel A placed thereon, a fixing means 3 to bolt-tighten the ...
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JP2002212640A |
To provide a method for producing an angular steel tube by which the improvement of the quality of an angular steel tube by heating can be maintained, further, its loss caused by high temperature heating is reduced, dents are hard to be ...
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JP2002210516A |
To provide a roll forming device for correcting the shape of a cylindrical body which is formed of a long metallic plate with rollers from the outer peripheral surface.A shape correcting apparatus M2 for correcting the shape of the outer...
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JP3309807B2 |
To provide a size-free rolling method of metallic materials in which the finished cross-sectional shape in the outer peripheral part is approximately complete roundness, the uneven diameter difference is extremely small and the cross-sec...
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JP3307294B2 |
To provide the method and device for manufacturing a seamless steel tube made of an Fe-base alloy whose Cr content is <15 wt.%, which are immediately applicable to existing manufacturing equipment by which a product steel tube reduced in...
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JP3305657B2 |
To obtain the sheath with both of strength and flexibility, and which is easy to house a PC steel with plural cross-sections of a tube. This sheath 4 is manufactured as follows, that is, the spiral steel tube with ribs swelled on its out...
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JP2002205118A |
To provide a straightening press method capable of safely straightening a large welded steel shape without requesting any supports for preventing overturning, and an apparatus thereof.A straightening press apparatus comprises a receiving...
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JP3302393B2 |
PURPOSE: To produce a high strength hardened steel tube for automobile door reinforcement improved in initial deformation resistance by subjecting a resistance welded tube having specific composition to induction hardening and then to a ...
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JP3299944B2 |
To efficiently conduct straightening by smoothly conducting a feed to straighten a bent panel. In the panel continuous straightening apparatus to straighten a bent panel P in which a reinforcing rib i is mounted along the longitudinal di...
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JP3297727B2 |
To provide a hose joining metal tool composed of a belt, a lever and a fastener which is inserted easily in the hose by making the shape of a ring into nearly complete roundness. In a 1st process (#1), on a band like steel 2a fed by a fe...
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JP3295127B2 |
PURPOSE: To smoothly and efficiently work without generating seizure, etc., even on the ring like product that the width of axial direction is long. CONSTITUTION: A ring like product W is pressed to the axial direction to a sizing die 2 ...
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JP2002172424A |
To provide a unit for straightening an assembled crankshaft capable of simply and correctly straightening fluctuations of the assembled crankshaft using a universal shaft fluctuations straightening unit.Based on measuring results of a se...
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JP2002172425A |
To provide an apparatus and method for straightening a cross section shape of a steel pipe capable of inexpensively and easily straightening circularity in the location separated from the tip end portion of the steel pipe.The apparatus f...
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