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Patent Searching and Data


Matches 701 - 750 out of 1,204

Document Document Title
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...  
JP04071710
PURPOSE: To squeeze shrinkage-cavity-like vacancy which is generated on inside surface of solidified layer and to press stick solidified metal without making boundary by pouring molten metal into the metal frame for centrifugal casting a...  
JP04071709
PURPOSE: To prevent the generation of end clogging without the lowering of efficiency and generation of inside flaw by providing a hole of a specified condition on the side of rear end of a material to be rolled which is fed to a Mannesm...  
JP04066207
PURPOSE: To prevent degradation and variance of the inner skin by keeping the velocity ratio of mandrel bar in a specified velocity ratio by an equation at the time of skew/elongating rolling using a mandrel bar. CONSTITUTION: A tube sto...  
JP04055005
PURPOSE: To satisfactorily suppress a fact that peeling is generated between a base metal pipe and a cladding pipe which are clod against each other, and also, to suppress the crack by forming successively a large diameter part in which ...  
JP04052011
PURPOSE: To surely remove scale by injecting a fluid on the inner peripheral surface of a pipe stock which is reduced on the inlet side of a skew rolling roll while a plug is inserted into the pipe stock, the above-mentioned fluid is inj...  
JP04013401
PURPOSE: To drastically improve the nose bend of the tip of a seamless tube by inserting a mandrel into the inner part to perform sizing in passing a sizer, in the sizing executed after passing a reeler in the manufacture of the seamless...  
JP04013402
PURPOSE: To drastically improve the nose bend at the tip of a seamless tube by opening the roll gap more largely than a set value in advance when the tip of a tube stock passes and closing the roll gap down to the set value for sizing di...  
JP03297505
PURPOSE: To roll the pipe with a good surface quality and without cracking by specifying the temp. condition before drawing and strain condition in drawing to a pipe stock after piercing when manufacturing the seamless steel pipe of a hi...  
JP03294003
PURPOSE: To obtain a steel tube having a good surface quality by setting temperatures of the inner and outer surfaces of a tube stock at a specified temperature in rolling a steel tube where specified values of C, Si, Mn, Cr, Ni, Mo, A, ...  
JP03281005
PURPOSE: To fix the inserting width of pipe and to prevent error when assembling by forming the tips of round pipes into a shape along the inner peripheral surface of socket, forming a build-up part on the outer surface of round pipes an...  
JP03281004
PURPOSE: To prevent the stripping and falling-off lubricant in accordance with heating for rolling by removing a mill scale on the surface of a material to be rolled before the lubricant for hot rolling tube is applied on the surface of ...  
JP03281026
PURPOSE: To temporarily retain the position of a main roll and to surely reduce the thickness deviation of a work by advancing the main roll from a waiting position at a fast feed speed, reducing a feed speed in sequence as far as the si...  
JP03258406
PURPOSE: To manufacture a seamless tube of two-phase stainless steel excellent in the quality of the outer surface of tube by using a round billet of stainless steel on which an aluminum film with a specified thickness is formed and manu...  
JP03248714
PURPOSE: To obtain the clad pipe without stripping or other joining defects by executing diffusion joining after fitting the hollow billet, and then, skew rolling. CONSTITUTION: On the case of the diffusion joining to be executed after i...  
JP03243212
PURPOSE: To provide the products without the structural defect and to enlarge the range of possibility of manufacture by fitting the high alloy hollow billet in the hollow billet of carbon steel, etc., and then, seal-welding the boundary...  
JP03240921
PURPOSE: To produce a seamless steel tube having superfine structure by applying piercing rolling to a solid round billet at specific piercing ratio while elevating the temp. of this round billet to a temp. in a specific region and tempo...  
JP03234306
PURPOSE: To eliminate the limitation of length in tube manufacturing by holding a plug in a tubing due to the balance of the rolling load of inclined roll and the coefficient of friction between the tubing and the plug in the cross helic...  
JP03226303
PURPOSE: To improve productive efficiency by rolling by preventing bulge with guide shoes which are provided among each roll when the metallic tubing with a large outside diameter into which a mandrel is inserted and which the ratio of t...  
JP03216203
PURPOSE: To manufacture the above clad steel tube without generating peeling and crack by giving a negative convergence angle to each roll of a three roll elongator and providing guide shoes freely movably forwards and backwards between ...  
JP03216205
PURPOSE: To ensure the stable workability of scraping and cleaning by scraping the edges only of disk guide shoes on the inlet side of rolling. CONSTITUTION: The disk guide shoes 3, 4 of a rolling mill with inclined roll are scraped and ...  
JP03211261
PURPOSE: To obtain a tube excellent in both strength and ductility only by annealing treatment, at the time of manufacturing a tube by an inclined rolling method, immediately after the end of hot rolling, rapidly cooling the rolled stock...  
JP03204106
PURPOSE: To improve the durability of plug by providing the covering layer of a specified composition on the surface of plug for manufacturing hot seamless tube and further forming an iron oxide layer with a specified thickness on that s...  
JP03198902
PURPOSE: To obtain a thin small diameter tube without squarishness, wrinkly flaws on the inner surface of tube and flaws on the outer surface of tube by forming elongating rolling under specific conditions using a plug with a rolling par...  
JP03193204
PURPOSE: To prevent the erosion and deformation of plug even when a seamless tube of high-alloy steel or nickel base alloy, etc., is manufactured by forming a covering layer of specified composition on the surface of base material for pl...  
JP03174908
PURPOSE: To easily and quickly perform on-line roll change by providing inner housings inside frames and providing guides with which roll chocks which are separated from draft adjusting devices are supported within those housing. CONSTIT...  
JP03169411
PURPOSE: To prevent seizure by providing nozzles with which lubricant is jetted toward rotary disks on the outside part of cannon with which a billet is introduced to a piercing roll in the piercing device of the manufacturing line for s...  
JP03169413
PURPOSE: To improve the productivity by knurling the surface roughness of a roll in a specified range during rolling a seamless steel tube by a skew rolling mill. CONSTITUTION: When the seamless steel tube is pierced or rolled by the ske...  
JP03169445
PURPOSE: To mass-produce a titanium ring for electrodeposition drum having good surface characteristic and high circularity under good workability by executing specific ring rolling to reduction ratio and outer diameter expanding velocit...  
JP03169410
PURPOSE: To roll a fine seamless steel tube without flaw on the inner surface by measuring piercing efficiency under rolling and knurling roll surfaces so as to make that measured value not less than a preliminarily determined value. CON...  
JP03165903
PURPOSE: To manufacture a tubing with the wall thickness and outside diameter of high accuracy in high yield by accelerating controlling the moving speed of mandrel bar in the rolling direction when the rear end part of tubing is rolled....  
JP03155401
PURPOSE: To shorten the length of a flare generated at the rear end part of a tube material and to improve the yield by adjusting the opening of rolling rolls so that the reduction of thickness of the rear end part of the tube material i...  
JP03151104
PURPOSE: To improve the productivity and to reduce the product cost without making a defect such as a crack on a product tube by determining a proper range of a quantity of state regarding the rolled state of a metallic tube and changing...  
JP03151103
PURPOSE: To prevent a large crack and a small rash flaw from generation by heating and piercing a billet of deeplex stainless steel material at a specified temperature. CONSTITUTION: The relation between the heating temperature of duplex...  
JP03151105
PURPOSE: To prevent titanium oxide from sticking to inclined rolls by piercing or drawing a billet or a hollow piece as water of high pressure exceeding a specified pressure is ejected on the surfaces of inclined rolls for descaling. CON...  
JP03149180
PURPOSE: To satisfy RMAX2μm or less surface roughness, required for a copying machine drum, with no necessity for accurate cutting work of high manufacture cost by applying roller burnishing work to an aluminum or aluminum alloy drawn p...  
JP03146206
PURPOSE: To prevent the seizure of rolls or tripping of driving and to prevent the generation of a defect in thickness and diameter by actually measuring the shell speed just before a shell is bitten in a sizer and controlling the roll s...  
JP03142010
PURPOSE: To agree a predicted value with a target value though a varying factor of rolling time is generated by predicting a rolling work done when a tube stock has been rolled and controlling a target electric power of rolling so that a...  
JP03128106
PURPOSE: To obtain a good internal face quality by deciding the moving speed of a mandrel bar and the initial position of the rolling start time under the conditions of reaching the start point of a roll bite part simultaneously with the...  
JP03128107
PURPOSE: To obtain a high internal face quality as far as possible by using a mandrel bar equipped with a tapered part connected to a regular part and the rear side thereof, bringing the whole length of the effective part of the mandrel ...  
JP03124305
PURPOSE: To improve the life of a plug and the steel pipe quality by fitting a common steel made protection cap to the tip of a plug for piercing in case of manufacturing a seamless steel pipe with its piercing for an alloy steel. CONSTI...  
JP03110007
PURPOSE: To facilitate a recombination and an adjustment work with the structure being simple, by abutting to the internal face tapered part of the friction ring whose inner diameter becomes larger toward the inlet side and driving a rol...  
JP03100096
PURPOSE: To obtain the title lubricant which can make a mixing operation simple and safe, facilitate sticking at ordinary temperature, shorten the drying time, and improve both the adhesiveness at ordinary temperature and the stability w...  
JP03100139
PURPOSE: To prevent the generation of cracks in the metallic tube caused by the difference in thermal expansion, in a one-end sealed metallic tube in which one end part is made of a tube the other end part is sealed, by integrally formin...  
JP03099708
PURPOSE: To manufacture a high alloy steel seamless steel pipe of high quality by cooling the shell internal face by a cooling water during the piercing of a shell and controlling the temp. of the shell inner and outer faces at the temp....  
JP03086304
PURPOSE: To obtain a material center rest feeding device which keeps a material on the center axis of a rotation working device by holding freely rotatably plural rings with containing the center axis of the rotation working device insid...  
JP03077708
PURPOSE: To properly hold a roll gripping force by executing a knurling so as to make the roll surface in the depth shown by an expression while under the size changing of a rolled stock in the state of roll being assembled to a housing....  
JP03071904
PURPOSE: To constrain the generation of an angular shape with the eccentricity of the shaft center of a metal pipe to a mill center being restrained, by inserting an inner face regulating tool to the inside of a metal pipe and performing...  
JP03066401
PURPOSE: To prevent the temperature lowering of a heating material and to work the material repeatedly, by arranging in series in order the heating device of the material, a cylindrical heat insulation guide device, working device repeat...  

Matches 701 - 750 out of 1,204