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Patent Searching and Data


Matches 651 - 700 out of 1,202

Document Document Title
JP04319002
PURPOSE: To provide a small inclined planet roll device with high rigidity by restraining fixing one of two input shafts. CONSTITUTION: One or more kinds of working rolls 1, back up rolls 2 or reinforced rings 5 are driven. At the time o...  
JP04319006
PURPOSE: To prevent the generation of the outside surface flaw and inside surface flaw of rolled stock by reducing slip between rolls and a material to be rolled in a Mannesmann type inclined piercer. CONSTITUTION: Rolling is executed by...  
JP04316750
PURPOSE: To simplify the structure of a machining device and to reduce the size thereof by locating the drum part of a plurality of sets of rollers so that the rollers are brought into contact with the inner surface of a friction ring mo...  
JP04316831
PURPOSE: To efficiently subject a shaft material such as a pipe material or a rod material to twist elongation processing at a high speed by selecting a path so as to specify the surface twist angle of the shaft material on an outlet sid...  
JP04309402
PURPOSE: To obtain the seamless steel pipe having the performance equal to the performance of a SUS 304 stainless steel by using a SUS 304L stainless steel without executing a soln. heat treatment. CONSTITUTION: This invention relates to...  
JP04294804
PURPOSE: To offer a means for restraining the generation of wrinkle-like defects on the outer surface when a solid billet is pierced by hot piercing rolling. CONSTITUTION: The solid billet 4 which is heated in a rotary hearth furnace 1 i...  
JP04288995
PURPOSE: To reduce the shearing strain of a shaft material by constituting a pass so that the work partial charge is migrated continuously from one pair to the other pair in connection with an advance, with respect to two pairs of roller...  
JP04284904
PURPOSE: To prevent a cutting surface from being oxidized continuously by atmosphere and to thin the material through hot rolling by carrying out piercing rolling, removal of an oxidized layer, sealing the inside and outside surfaces of ...  
JP04274807
PURPOSE: To prevent the generation of seizure on guide shoe surfaces. CONSTITUTION: The piercing machine 10 constituted by disposing a pair of inclined rolls 11 so as to face each other, disposing a plug 12 at the center of the rolling r...  
JP04274806
PURPOSE: To prevent the tube end crack and the rolling trouble, and to improve the rolling work efficiency and the yield of a product, at the time of manufactur ing a seamless alloy steel tube. CONSTITUTION: Common steel square pieces 3,...  
JP04266411
PURPOSE: To provide a shaft material working device easy to change a pair of rollers by making up a pair of inclined rollers to clamp and advance the shaft material into such a state that they are twisted in a cage as skelton round a pas...  
JP04266405
PURPOSE: To enable manufacture of an inside grooved steel tube provided with a reasonable shape though the thickness is large. CONSTITUTION: The manufacturing device of an inside grooved seamless steel tube having a pair of rolling rolls...  
JP04254520
PURPOSE: To offer a method for manufacturing a resistance welded oil well pipe high in the Young's modulus in the circumferential direction of the steel pipe and excellent in crushing properties. CONSTITUTION: This is a method for manufa...  
JP04254521
PURPOSE: To manufacture a resistance welded oil well pipe high in the Young's modulus in the circumferential direction and excellent in crushing properties by subjecting the cast slab of a steel having a specified compsn. contg. C, Si an...  
JP04251604
PURPOSE: To beforehand prevent the generation of abnormality of peeling, buckling, etc., by restraining bottom flare in the terminal part of tube at the time of skew rolling using a piercer, elongater, etc. CONSTITUTION: The terminal of ...  
JP04231105
PURPOSE: To embody elongating and rolling with the highest possible efficiency without the deterioration of quality with a smaller number of roll stands by minimizing the number of the roll stands as far as possible. CONSTITUTION: The ro...  
JP04224008
PURPOSE: To provide a method and device for manufacturing a seamless pipe having medium-thick and thin walls which is in a region of diameter/thickness ratio of 15:1 to 50:1, has a least possible cost of device and an excellent surface q...  
JP04224009
PURPOSE: To manufacture a seamless stainless steel tube excellent in the outside quality of the tube by minimizing surface defects by an elongator and forming titanium film on the surface, whereon flaws do not grow in spite of reduction ...  
JP04224004
PURPOSE: To obtain a rotary ring mill easy to bite material. CONSTITUTION: In the rotary ring mill wherein the barrel parts of rolls are brought into contact with the inside surface of a driving ring and a tube or a bar is worked between...  
JP04187310
PURPOSE: To restrain the generation of inside surface flaw and to obtain a stainless steel tube excellent in the quality of inside surface by rationalizing the inclination angle of the main rolls of an elongator, elongation ratio and int...  
JP04182010
PURPOSE: To prevent the inside surface of tube from generating oxidized scale by applying liquid glass lubricant on the inside surface of the tube of compound material before heating in the manufacture of a clad steel tube by skew rollin...  
JP04182008
PURPOSE: To prevent the generation of the interior defect of tube by specifying piercing rolling conditions at the time of manufacturing a seamless tube. CONSTITUTION: At the time of manufacturing the seamless tube, when a billet (base s...  
JP04178204
PURPOSE: To remove the carburized part due to the plug mill rolling while making the total cost minimum by specifying the thickness reducing amount of the plug mill and the rolling temperature of one pass time, and rolling by controlling...  
JP04172112
PURPOSE: To prevent the generation f shoe mark due to the seizure of the guide shoe almost completely by rolling after coating the outer circumferential surface of the round steel bar or the tube stock of the high temperature state with ...  
JP04167905
PURPOSE: To prevent the development of peeling caused to development of miss roll by arranging a fixed guide at between each disk roll and cross helical roll and bringing the fixed guide into sliding contact with outer peripheral face of...  
JP04158908
PURPOSE: To obtain a seamless steel tube of duplex stainless steel excellent in the outside surface quality of tube without rolling flaw that is harmful to productivity and cost by rolling by Mannesmann process for making tube using a ro...  
JP04157005
PURPOSE: To reduce defective products by measuring the amplitude of vibration of a shell on the outlet side of an elongator with the measuring sensor of a single axis CCD camera, sending these signals to a means for judging amplitude of ...  
JP04157006
PURPOSE: To reduce thickness deviation by affixing a strain gage on the inside surface of the bar cap of a mandrel bar, receiving electric signals in accordance with the strain from the strain gage on a radio and diagnosing inconsistency...  
JP04147705
PURPOSE: To produce the corrosion resistant metallic pipe which allows the remaining of uniform residual stresses and the reproduction thereof by fitting roller supporting metals which support elongating rollers freely movably forward an...  
JP04147706
PURPOSE: To improve the life of a plug for piercing by specifying the relation between the diameter and effective length of the plug. CONSTITUTION: The diameter of the plug for producing a seamless steel pipe, designated as Dp and the ef...  
JP04147708
PURPOSE: To improve the dimensional accuracy of a steel pipe by attaining the target rolling torque meeting the rolling speed of a reeling mill in order to attain the coincidence of a thickness rolling reduction and a target thickness ro...  
JP04147704
PURPOSE: To prevent the generation of inside surface flaws by specifying the relations among the heating temp. of a blank material, the upper and lower limits thereof, the straining rate of piercing, the sulfur concn. of the blank materi...  
JP04143219
PURPOSE: To form a uniform and superfine austenite structure and to produce a hot rolled bar steel excellent in strength, toughness, and corrosion resistance by inversely transforming ferrite phase into austenite phase while applying pla...  
JP04143006
PURPOSE: To prolong the life of a mechanism for removing secondary scale by making a cooling bar which is provided in the tip part of a mandrel bar of elongator for manufacturing seamless tube and which is communicated with a path for co...  
JP04143004
PURPOSE: To prevent rear end contraction by retreating a plug at the point of time of rolling the predetermined part on the rear end side in the rolling direction of a base stock in the skew rolling of seamless tube. CONSTITUTION: At the...  
JP04143012
PURPOSE: To prevent the generation of uneven wall thickness due to the inclined roll on the drilling process by storing the inclining deviated speed wave shape caused by the universal joint and controlling the rotation speed of the drivi...  
JP04143005
PURPOSE: To improve the unit requirement of fuel by specifying a heating temp. and gorge in the manufacture of seamless tube with a Mannesmman type skew rolling mill. CONSTITUTION: In the manufacture of seamless tube with the Mannesmann ...  
JP04138807
PURPOSE: To prevent the generation of the pressed flaw of ceramic oxidized scale on the surface of tube and to reduce the repair rate of the surface of tube of the final product by heating a billet after ceramic antioxidants are applied ...  
JP04138808
PURPOSE: To prevent the generation of the surface flaw of tube due to grain boundary oxidation when heating a billet by preheating the billet on the preceding stage of heating the billet and making the billet into a tube and applying ant...  
JP04138806
PURPOSE: To prevent selective oxidation when heating a billet and in its turn to prevent the generation of the pressed flaw of oxidized scale on the surface of tube by rolling the billet as it is without repairing when the number of surf...  
JP04135004
PURPOSE: To prevent flaw on the inside and outside faces, angularity and end clogging and to execute high-accuracy rolling by confining the wall thickness/outside diameter ratio of tube stock and the shapes of inclined rolls and plug and...  
JP04135001
PURPOSE: To manufacture a base stock for high alloy seamless steel tube with high yield by specifying the cross section of the base stock and its rolling quantity when a round billet for seamless steel tube is manufactured from a cast bl...  
JP04135002
PURPOSE: To completely pierce without causing end clogging and defective piercing by piercing while pushing the rear end of base stock again with a pusher just before the end of piercing. CONSTITUTION: Just before the end of piercing, th...  
JP04135005
PURPOSE: To roll a tube without generating excess shearing strain in a shell by inclining the roll axis of a conical roll of a two roll type skew rolling mill at a prescribed angle to the pass center, crossing and approximately fixing th...  
JP04135003
PURPOSE: To freely set a tube length and to execute high-efficiency and high-quality rolling by specifying the diameter reduction rate of tube when rolling and the shapes of an inclined roll, guide member for bar for tube, plug, etc. CON...  
JP04127902
PURPOSE: To improve quality, yield, productivity, safety in the manufacture of a thin-wall small diameter tube of silver alloy by adopting stages of hot piercing rolling, hot diameter reducing rolling and cold working from a billet. CONS...  
JP04111906
PURPOSE: To produce the high-Ni alloy seamless pipe having the good outside surface quantity of the pipe without generating rolling flaws by using a round billet or square bloom of the high-Ni alloy formed with an aluminum film on the su...  
JP04105705
PURPOSE: To prevent seizure, surface flaw of a tube stock and to prevent a roll from wear and the life from lowering by removing the flow of cooling water with a dewatering plate provided on the inlet side of a rolled stock of a caliber ...  
JP04084610
PURPOSE: To obtain a thin steel tube of high out-of-roundness without correcting means by keeping that posture to a required temp. after rolling by arranging an elliptic caliber which is elliptic in the vertical direction in at least the...  
JP04081209
PURPOSE: To enable piercing and elongation continuously, at a large quantity and with poor surface flaws by using an inclined roll mill, spraying cooling water to the rolls from a mist nozzle, and/or removing excessive cooling water on t...  

Matches 651 - 700 out of 1,202