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Patent Searching and Data


Matches 1,001 - 1,050 out of 1,205

Document Document Title
JP60024203
PURPOSE: To obtain a titled disk capable of preventing the flaw generating in the outer surface of a product pipe and improving operating efficiency by forming a nonmetallic film on the surface of a disk used for manufacturing a pipe for...  
JP60021111
PURPOSE: To produce a seamless steel pipe having high quality with high efficiency by performing piercing while supplying a liquid paint mixture composed of metallic oxide powder and granules and a binder to the circumferential surface o...  
JP60009504
PURPOSE: To prevent the generation of seizing defect, etc. in the pipe surface by providing balls to the space between the slidingly contacting surfaces of disks and an opposing material, in disher disks used for pipe manufacturing toget...  
JP60006208
PURPOSE: To prevent generation of the flaw caused by the scale on the inside surface of a steel pipe in a rolling method of a hollow blank pipe by a roll piercing method by feeding fluid through the inside of a mandrel supporting a plug ...  
JP60006216
PURPOSE: To improve the resistance of a guide shoe to seizure and to improve the durability and productivity thereof by providing a recess of a specific depth on the guiding surface of the guide shoe and spraying thermally and depositing...  
JP59212106
PURPOSE: To prevent the generation of outer surface flaws of a finished pipe by gradually reducing the outer diameter, at the outlet side of the end part to be rolled of a blank pipe, in a circular arcuate shape along the axial direction...  
JP59206105
PURPOSE: To prevent the generation of an eccentric wall-thickness deviation and to obtain a high-quality seamless pipe by connecting swingably a plug to a mandrel bar and aligning the axial center line of the plug with that of a material...  
JP59197305
PURPOSE: To manufacture easily a hollow bar material excellent in dimensional accuracy without using a mandrel by elongation-rolling a hollow blank material by a skew rolling mill equipped with plural cone-type rolls forming specific int...  
JP59174203
PURPOSE: To reduce remarkably the generation of specks such as pits or eruption by forming a center hole which satisfies a prescribed condition at the center of the rear-end surface of a billet before piercing, in a Mannesmann pipe manuf...  
JP59169607
PURPOSE: To provide a titled piercer capable of efficiently mending and exchanging disks without moving work rolls vertically by horizontally turning the guide disks used for supporting a material between upper and lower rolls around the...  
JP59159218
PURPOSE: To grasp accurately a condition of the wall thickness deviation of a pipe and the causes of its generation by continuously measuring a vibrating condition in the longitudinal direction of a blank pipe in rolling and monitoring t...  
JP59153506
PURPOSE: To improve the seizure-and-peel-resistant properties of a guide shoe and to extend its service life by using a guide shoe, for manufacturing a seamless pipe, having the surface provided with an undercut part on which ceramics ar...  
JP59150613
PURPOSE: To improve the quality of a round billet to be rolled by providing a tension detector to a holding device of a mandrel bar and making the gap between barrl-type rolls changeable in accordnace with the vairation of the tension of...  
JP59141307
PURPOSE: To remove easily the seizure of caliber end and to prevent edge mark by pressing a grinding wheel,having circular-arcuate surface corresponding to a groove of semicircular caliber-end of a finishing mill, against said caliber en...  
JP59133930
PURPOSE: To reduce considerably the sectional area of a pipe by pressure with a relatively small-sized installation by making small the contact area of ring roll calibers and the pipe to deform locally the pipe and making the pipe deform...  
JP59133929
PURPOSE: To decrease uniformly the sectional area of a long columnar body by supporting said body with supporting devices adjacent to an eccentric ring roll, pressing the caliber surface of the eccentric ring roll to the surface of the l...  
JP59118206
PURPOSE: To detect easily the generation of thickness deviation due to the off- center of a plug by detecting a thrust load acting on the rolling plug of mill during rolling, and judging the generating condition of the thickness deviatio...  
JP59110414
PURPOSE: To make the wall thickness of a final product uniform in its longitudinal direction, by controlling the position of a rolling plug while a rolling is operated in an elongator so that a rolling load is kept constant at the time o...  
JP59094515
PURPOSE: To improve the outer diam. controlling accuracy of a product steel pipe, by setting respectively the extents of control with respect to the reference set values of respective distances between the bottoms of roll grooves of at l...  
JP59094514
PURPOSE: To improve the outer diameter controlling accuracy of a product steel pipe, by including the apparent increasing portion of a shrinkage coefficient of outer diam. due to a wear of roll into a shrinkage corfficient of outer diam....  
JP59092108
PURPOSE: To make the wall thickness of a finish pipe obtd. in reduction uniform by providing the clearance as much as the predicted amt. of the expansion in the outside diameter at the end of a hollow blank pipe with reduced thickness ro...  
JP59092109
PURPOSE: To provide a titled reduced thickness rolling device which suppresses flaring with the thickness reduction in the outside peripheral part at the end of a hollow blank pipe by disposing guide shoes which restrain the outside peri...  
JP59092107
PURPOSE: To obtain a seamless steel pipe which is smoothly reduced in thickness at the end of a hollow blank pipe by adjusting relatively the revolving speed and rotating speed of rolling rolls to prevent the roling rolls from exterting ...  
JP59092106
PURPOSE: To provide a rolling mill with three rolls which permits quick working of a desired bar material by changing the angle of rolling rolls at which the rolls contact with the working material on the right and left and moving horizo...  
JP59080716
PURPOSE: To manufacture efficiently a long-sized two-phase alloy pipe having a large diameter at a low cost by properly setting the heating temp. of a two- phase alloy contg. Cr in relation to the amount of austenite, and manufacturing a...  
JP59078705
PURPOSE: To prevent surely the generation of a sticker phenomenon in the stage of pushing a blank material into a piercing mill for producing a seamless steel pipe by applying beforehand rotation to the blank material. CONSTITUTION: A bl...  
JP59076602
PURPOSE: To improve dimensional accuracy in the stage of piercing a blank material with a skew roll piercer and producing a hollow blank pipe by measuring the size and shape prior to piercing of a plug to be used for piercing at every pi...  
JP59076608
PURPOSE: To control highly accurately a shape of pipe rolled by a reeler, by adjusting a torque difference between motors for driving both rolls by field adjusting relatively roll driving motors for driving rolls respectively to adjust t...  
JP59076609
PURPOSE: To make the wall thickness and roundness of a product highly accurate, by providing a tension detector to a mandrel bar, and keeping a tension of mandrel bar constant by changing the rotating speed of barrel-shaped rolls in acco...  
JP59070424
PURPOSE: To obtain a sure biting detection signal of a tube material in piercing a tube material by a barrel-shaped roll and a plug at the tip of a mandrel bar by detecting compressive force acting on the mandrel bar. CONSTITUTION: A man...  
JP59056907
PURPOSE: To enable production of a titled pipe with good productivity by forming ruggedness on the surface of a rolling roll during rolling or no-load operation by means of a blade provided in a roll housing of a skew rolling mill and a ...  
JP59054404
PURPOSE: To prevent the defective biting of a blank material and the formation of the defective inside surface of a blank pipe by specifying the ratio of the distance from the position where the blank material is bit between rolls up to ...  
JP59054410
PURPOSE: To roll a blank pipe in a steady state, and to equalize the torques of respective motors, by controlling a field system so that the magnetic flux density of a roll driving motor at the pipe feeding side is larger than that of a ...  
JP59050906
PURPOSE: To prevent he generation sticker phenomenon by calculating beforehand the axial speed of a blank material when the fiting to main rolls is completed and determining the axial speed of the blank material as the upper limit of the...  
JP59039407
PURPOSE: To pierce the central part of a billet with the guide of a cooled outside peripheral part and to improve yield by jetting a cooling fluid to the outside circumference on the rear end of the billet which is held heated to cool th...  
JP59035813
PURPOSE: To perform smoothly a rolling of a material of thin wall thickness, by forming the shape of a skew roll so that the gap between a disk guide roll and the skew roll becomes zero at the over filling side. CONSTITUTION: In a skew r...  
JP59033011
PURPOSE: To prevent the formation of oxide scale on the inside surface of a hollow blank material in the stage of piercing a blank billet by means of inclined rolls and a plug by supplying an inert gas to the pierced hollow part. CONSTIT...  
JP59033010
PURPOSE: To provide a titled device which avoids the formation of surface roughening on the inside surface of a seamless steel pipe product by the constitution wherein an inert gas introduced into a plug bar from the root end part thereo...  
JP59007407
PURPOSE: To improve hot online the dimensional accuracy of a seamless steel pipe by determining the helix angle in the axial direction of a thickness deviation from the fluctuation in the wall thickness of a blank pipe detected during ho...  
JP59007425
PURPOSE: To detect an influence degree on a torsion angle and deflected thickness at a practical accuracy level when searching a factor of generation of deflected thickness, by evaluating in advance a torsion angle being a factor of gene...  
JP59004909
PURPOSE: To push a billet into main rolls for biting it in good conditions, by controlling the driving current of a DC motor of a pusher used for billet in accordance with the changes of length, temperature, and material of the billet, i...  
JP59004905
PURPOSE: To enable the production of a thick walled hollow bar material having excellent out of roundness without using any tool such as plug or mandrel by drilling the round bar steel material along the central axis thereof, and drawing...  
JP59001007
PURPOSE: To provide a titled conical roll made capable of preventing the generation of spiral mark of a material to be rolled, by forming the connecting part of a rolling zone and a correcting zone of a conical roll into a smoothly curve...  
JP59001008
PURPOSE: To provide a titled device made capable of exchanging a disk guide safely and quickly, by constructing the device to put a disk guide pulled out to the outside together with a journal box on a disk-guide bearer, and to lower it ...  
JP58221605
PURPOSE: To provide a titled rolling mill which decreases the rolling force on a mandrel by making the angle of inclination, diameter and offset angle of circular conical rolls respectively small, and containing the ultimate range of the...  
JP58215209
PURPOSE: To extend considerably the life of a mandrel by moving the mandrel inserted into a rough pipe together with the rough pipe until the rolling work is finished thereby preventing the mandrel from receiving local overheating by rol...  
JP58204163
PURPOSE: To obtain the titled cast alloy with superior resistance to heat, wear and thermal shock, by restricting a composition consisting of elements such as C, Cr, Ni, Co, Ti, Al, W, Mo and Fe. CONSTITUTION: This cast alloy with superi...  
JP58184004
PURPOSE: To enable desired adjustment of a feed angle by fitting a rotary housing and an inner housing freely rotatably into a stationary housing and rotating these housings in one body. CONSTITUTION: A cylindrical stationary housing 1 i...  
JP58181411
PURPOSE: To detect accurately the melting-down of a plug, by measuring a motor current at the time when a shell is separated by retreating a thrust block, and comparing the current with a motor current in a normal state. CONSTITUTION: Wh...  
JP58168414
PURPOSE: To reduce the thickening of wall thickness at the top part of a pipe, and to improve product yield, by feeding back the data of wall thickness at the top part of a pipe stayed in a cold state, and using the data as the roll gap ...  

Matches 1,001 - 1,050 out of 1,205