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JP3293246B2 |
PURPOSE: To manufacture a highly strong seamless steel tube having little surface flaws by straightening in a specified range of temperature after a hot rolled seamless steel tube is sized, cooled to specified temperature range in a low ...
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JP3292823B2 |
To provide a production method for a round steel tube having the reduced whole equipment cost and a good working efficiency. By pressing from the outside after plural places in a width direction of a strip steel are bent and by welding a...
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JP3289669B2 |
To prevent the defective correction of round part in a wide flange shape steel by calculating a correcting load and varied quantities of one pair of roll widths from the necessary intermesh quantity to the correction, adjusting the roll ...
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JP3288215B2 |
To simply change the roll width of a roll straightener for straightening the camber of a wide flange shape on line. A moving roll 5b is fixed to a mounting seat 6 and the female screw of a screw ring 9 is engaged with the male screw 6a o...
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JP2002143929A |
To provide a portable channel steel straightening machine in which any large facility is not required, even an inexperienced operator can easily perform the work, and the productivity is high.This straightening machine has side plate par...
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JP3280746B2 |
PURPOSE: To cope with change in size in a short time by arranging an outer frame having elevating means and a pair of inner frame movable reciprocally in the outer frame and having a transfer mechanism movable along the longitudinal dire...
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JP3279385B2 |
PURPOSE: To provide a rail production method to improve the rolling traverse defect property generated from inside of a rail so as to settle the problem in heavy load railway abroad. CONSTITUTION: Rrolls 4 of 100-600mm diameter are place...
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JP3279384B2 |
PURPOSE: To provide a method for straightening a rail with which the frequent occurence of damage due to rolling fatigue of rail that is anxious in accordance with speed-up of a train and lifting and slipping of wheels due to the ruggedn...
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JP3275387B2 |
PURPOSE: To provide a jig by which a metal strip can be machined into a circular column near to a complete round through heat treatment. CONSTITUTION: The jig is composed of an outer structure body 2 having a cylindrical inner circumfere...
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JP3274803B2 |
To repeatedly bend a bar stock even in a horizontal plane with a simple structure, to cope with various dimensional change of the bar stock, and to provide excellent correction accuracy and quality. Correction rollers 2, 3 are fitted to ...
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JP2002102966A |
To manufacture and repair even a large diameter pressure vessel with less man-hours and high quality and prolong the lifetime.A steel plate 5 is cut in a prescribed length, bent parallel in the main rolling direction to fabricate a longi...
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JP3271469B2 |
PURPOSE: To obtain high straightening precision. CONSTITUTION: By inputting a signal to identify an individual body of material to be straightened, a straightening position, a pressing direction, a plastic deformation required for straig...
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JP3268378B2 |
PURPOSE: To provide a manufacturing method for forming the angle in the stepped part of a special shaped bar material having recessed lines or projecting lines up to right angles without wasting materials at a relatively higher speed by ...
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JP3267185B2 |
To reduce defects by burning flaw and to enable cold-drawing even it is a steel tube having several tens μm thick scale. After generating cracks 3 on the scale 2a of a steel tube 2 with the scale 2a stuck, cold-drawing is executed by oi...
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JP3264140B2 |
PURPOSE: To provide a gear device small in the manufacturing cost and long in the service life by projecting a center part in the tooth trace direction from each end part so that the tooth flank and the tooth crest of an internal gear de...
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JP2002066665A |
To provide a working method of a cylinder body capable of satisfactorily forming an end portion of an approximate true circle by directly processing an elliptical cylinder body and also capable of particularly improving working capabilit...
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JP3262712B2 |
To quickly correct defective shape and to improve the dimension precision by continuously measuring the deviation of the center of a welded wide flange shape steel at the downstream side of a welding device and controlling the passing po...
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JP2002059216A |
To efficiently manufacture a plane body of a high precision by efficiently straightening the plane body.By comparing a plane suitable for straightening (hereunder, expressed as straitening objective plane) a plane section 1a or an outer ...
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JP2002047537A |
To provide a material for a round bar which does not eventually bend, reliably suppresses the bend to be negligibly small so as not to raise any problems in the industrial use even when a bend occurs, and has no degradation in surface qu...
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JP2002035869A |
To provide a die for a mechanical pipe expanding machine capable of reforming a pipe by pressing the portion which is formed on both sides of a bead of steel pipes or the like and which is untouched with the expanding machine in reformin...
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JP3250466B2 |
To provide an expansion die effective for correcting a large longitudinal ellipse before expansion and capable of securing the true circularity after expansion even for the intermediate size by providing each die segment with different t...
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JP2002018524A |
To provide a deformation straightening apparatus capable of precisely straightening a deformation in a short time while suppressing a hardness variance due to a heating fluctuation in straightening a deformation.In the state an outer dia...
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JP2002001428A |
To provide a method for manufacturing a quadrangular steel pipe which can make each flat plate section planar and each size and configuration of the right- angled bending section uniform.When a group of rolls 42-44 of a rolling means 40 ...
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JP2002001433A |
To shorten time involved for a deformation correcting work by reducing an excessive or insufficient bending of a workpiece and decrease fatigue of the workpiece accompanying the correcting work.The deformation correcting apparatus 1 is p...
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JP2002001442A |
To provide a manufacturing method for a square shape steel pipe in which the intermediate flat plate portion is made flat, and the size and shape of each right angle bent portion are made even.Two portions near equivalent to groove porti...
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JP2002001431A |
To provide a surface reforming correction machine that can perform a process to correct straightness of a round bar steel stock and a process to grind the surface of the round bar steel stock at the same time.The surface reforming correc...
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JP2001353524A |
To quickly cope with a dimensional change in a tube and to improve a precision in a tube cutting length.A tube drive mechanism 10 inclusive of a pair of conveyer belts 43, 62 opposing each other is used for the purpose of transporting co...
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JP2001353542A |
To provide a method and a device for drawing a galvanized steel tube in which a surface of the galvanized steel tube is prevented from being blackened in drawing the tube.In the galvanized steel tube drawing method in which the galvanize...
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JP2001329316A |
To provide a hot finished seamless steel tube which is less in the dimensional changes caused by the residual strain in the case of grinding inner and outer surfaces of a cut ring used for a bearing race, etc.In this manufacturing method...
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JP3216932B2 |
PURPOSE: To carry out reconditioning and bending with high accuracy by providing a first bending punch that bends outer leads of a semiconductor device held between a fixed plate side receiving table and a movable plate side holding memb...
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JP2001276928A |
To provide an interlocking member which helps to form a convergent portion easily in a short period of time. Fine diameter convergent portions 31a, 31b are formed respectively through cold forging on both ends of a member body 21 of a su...
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JP2001269713A |
To provide a high-strength stainless steel welded tube for suppressing integranular corrosion cracking in a weld heat-affected part by welding heat and a method of manufacturing it. The tensile residual stress in the circumferential dire...
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JP2001259727A |
To provide a cooling bed device which the bends in both end parts of a long size material is straightened on the way of conveyance after water- cooling of the rolled long size material.A chain conveyer type conveying device 4 for conveyi...
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JP3211709B2 |
To provide the manufacture of the shape steel even more excellent in the dimensional precision of a product and with few defects on its surface. By providing a dimension gage SO on the inlet side of a breakdown mill BD, by feeding forwar...
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JP2001259741A |
To provide a circularity correcting apparatus capable of easily correcting an end part of a steel tube even when a deformed steel side is of relatively a large size and is fixed.The apparatus is provided with a fixed circularity correcti...
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JP3211710B2 |
To provide a method for manufacturing shaped steel much more excellent in dimensional accuracy of products and with less surface defects. A press machine, two-high mill or universal mill 10 is arranged on the upper stream side of a break...
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JP2001259763A |
To provide a mechanism tube expanding machine capable of reducing wear of relatively moving faces against each other and eliminating a lubricant oil use in these regions.The mechanical tube expanding machine has a pyramidal polygonal bod...
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JP2001252720A |
To provide a roller straightening method for stably straightening a warp and a wavy shape of a material to be straightened, and its equipment.In order to secure biting property of a material to be straightened and to exhibit a sufficient...
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JP2001232416A |
To provide a forming device for shapes with which the accuracy of a cross-sectional shape is efficiently improved by hot correcting the offset of the center that is generated at rolling.The forming device in which web rolls 2 for restrai...
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JP2001513030A |
(57) [Summary] The present invention relates to a device that introduces pipes, bars, rods and similar raw materials into a machine that is machined as a result of rotational / locomotion around these axes. The device has a feed device f...
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JP2001513028A |
(57) [Summary] Hydraulic cylinder-piston units (7, 8) for adjusting the position of at least one working roller (7, 8) with respect to the linear axis (L) in machines generally described for straightening pipes and rods. 25). Convenientl...
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JP2001212618A |
To provide a core rod capable of finishing an internal diameter face of an oil impregnated sintered bearing with an appropriate amount of pore with easy, inexpensive and good measurement accuracy to obtain the oil impregnated sintered be...
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JP2001212617A |
To provide a method of easily manufacturing an aluminium product having a uniform section whose measurement accuracy is generated.The method of manufacturing the aluminium product having a uniform section is characterized to have a die-c...
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JP2001205335A |
To provide a portable bending correction machine capable of easily correcting bending of a copper tube in a piping laying site. Plural correcting rollers 62 are journaled by a frame on one straight line respectively apart each other and ...
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JP3191005B2 |
To correct a distorted lead rapidly and with high precision into a natural and correct state, by specifying a circle locus for correcting a lead as a correction circle locus, and rotating the lead plural times without twisting while the ...
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JP3183083B2 |
PURPOSE: To provide a cut tee manufacturing equipment with which the straightness of the cut tee is ensured, the man-hour and manufacturing term at the time of manufacture are shortened and the cut tee is manufactured by cutting the web ...
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JP2001179340A |
To provide a method for correcting tubes accurately and efficiently without considering any influences caused by rolling wear of a corrector. A tube corrector with roller system is provided with rollers which have an opening mold formed ...
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JP3183077B2 |
PURPOSE: To provide a method and device for manufacturing a cut T shape steel formed by cutting the web of a H shape steel with high efficiency, by securing the straightness of the cut T shape steel after cutting, and reducing the man-ho...
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JP3179348B2 |
To provide a strain correcting device with which the strain in a rear fork of a motor-cycle, for example, is accurately corrected and surely corrected by everybody without requiring skillfulness. The amount of strain of the inside width ...
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JP3175918B2 |
To stably provide high collapse strength by computing initial cooling temp. so that the inside circumferential residual compressive stress of a steel pipe, resultant from warm straightening, becomes equal to residual tensile stress at wa...
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