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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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....
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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...
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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....
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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...
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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...
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JP03066403 |
PURPOSE: To prevent the abrupt stress variation of a pipe rolling part and to improve the dimensional accuracy and quality by gradually increasing a tensile force to a specific value, gradually increasing the tensile speed of a pipe to t...
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JP03042103 |
PURPOSE: To prevent excessive rolling reduction of a tube as an objective to be rolled by controlling a crossed axes angle so that ratio of a repulsive force of roll on the inlet side of reeler rolls to a repulsive force of roll on the o...
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JP03027806 |
PURPOSE: To prevent the generation of runout, while securing the outside diameter accuracy of a follow bloom by moving a position of a disk shoe based on a gorge part as a reference in the tube axis direction in accordance with an inequa...
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JP03027805 |
PURPOSE: To allow an immediate constant-diameter rolling without subjecting a stock to a reduction drawing after piercing by setting the max. roll diameter in the outside diameter reduction part of the rolling rolls of a piercer larger t...
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JP03013223 |
PURPOSE: To execute the manufacture with high efficiency by specifying the drawing quantity of a tube and a plug mill entry side surface temperature, at the time of manufacturing a Ti or Ti alloy seamless tube. CONSTITUTION: At the time ...
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JP03013222 |
PURPOSE: To make the wall thickness size of a seamless tube constant by changing simultaneously the inclined roll opening and the plug advanced quantity and executing the rolling, in a pierce rolling process by a piercing mill. CONSTITUT...
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JP03008506 |
PURPOSE: To improve bite and also to enable the high work efficiency of the control of rolling by reeler rolls by performing reeling by making the inclined angle of reeler rolls smaller when a tube is bitten and making the above inclined...
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JP02295603 |
PURPOSE: To effectively prevent the formation of the shoe mark flaws generated by seizure by rolling a material to be rolled while supplying a seizure preventive agent on the outside surface of the material to be rolled over the entire c...
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JP02263506 |
PURPOSE: To improve thickness and dimensional accuracy by using skew rolls each formed with the inlet side surface of the inlet side part to a curved surface changing in diameter smoothly toward a reeling side. CONSTITUTION: A hollow she...
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JP02251304 |
PURPOSE: To prevent erosion and cracking from arising by fitting a plug body and a tip part made up of heat resisting metal in which resistance to compressive deformation at a specified temperature exceeds a specified value through a cle...
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JP02251305 |
PURPOSE: To reduce the shoe reaction of a roller shoe and to improve its quality and yield by equipping linear grooves nearly in parallel and at an equal interval to the advancing direction of rolling of a material to be rolled and on th...
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JP02241603 |
PURPOSE: To decrease the wear of a plug by executing piercing by using the plug previously used for piercing-rolling a carbon steel or a low alloy steel contg. specific % of Cr for piercing. CONSTITUTION: A solid billet B is pierced by u...
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JP02224805 |
PURPOSE: To decrease the damage and deformation of a plug without using a costly high-temp. and high-strength material by disposing the plug and main rolls so as to satisfy a specific relation and executing piercing and rolling while inj...
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JP02224808 |
PURPOSE: To prevent the seizure of disk roll-shaped guide shoes and a rolled stock and to effectively prevent the slip between both as well by executing the supply of a seizure preventive agent while specifically maintaining the surface ...
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JP02175012 |
PURPOSE: To manufacture product tubes having optional outside diameters by sizing a billet without using plug by an elongator and/or a reeler after the billet is pierced by a piercer. CONSTITUTION: A billet 1 is heated by a heating furna...
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JP02169128 |
PURPOSE: To average rolling action at each part as possible and to work a cold rolled product good in quality by giving a small difference to surface to be roll-formed by a right and a left unit roll not to leave a non-forming part when ...
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JP02165890 |
PURPOSE: To efficiently obtain the stainless steel for far IR radiators by forming a stainless steel strip subjected to a dull skin pass treatment into a welded stainless steel pipe and forming this steel pipe as the steel pipe having sp...
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JP02160103 |
PURPOSE: To manufacture titanium seamless tubes in a seamless tube continuous manufacturing line by bringing a temp. of a titanium hollow shell in the inlet side of a sizer to be a specific temp. and sizing rolling the shell by a specifi...
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JP02160111 |
PURPOSE: To manufacture a tube having an inside spiral groove high in dimensional accuracy by using a skew rolling mill having a plug provided with a spiral groove, carrying out skew hot rolling of a metallic tube stock, removing the oxi...
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JP02160112 |
PURPOSE: To greatly reduce the manufacturing manhour for a metallic tube having an inside spiral groove by piercing and rolling a metallic tube of a solid circular section in a hot state through a skew rolling mill in which a plug provid...
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JP02142604 |
PURPOSE: To perform high efficient and accurate rolling by composing a mechanism so that an optimum operation terminal can be selected in on-line in accordance with situations by using a prescribed shape evaluation function by an optimum...
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JP02137604 |
PURPOSE: To prevent generation of surface defects such as eruption, flaws, and cracks on both the outside and inside surfaces of a tube by forming a solid billet of an α+β type titanium alloy at a specified working finish temp. and a s...
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JP02121706 |
PURPOSE: To manufacture high quality seamless metal tubes having no shoe mark flaw by changing a working position in the direction orthogonal to a rolling direction of disk shoes per rolling and mechanically removing adhered metal on dis...
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JP02121707 |
PURPOSE: To work a long-sized, highly tough, and viscous stock having good working accuracy by separately installing an independently and respectively driven rotating roller head and a rotating casing and bringing the roller head provide...
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JP02117706 |
PURPOSE: To concurrently attain improvement of both biting property of rolls and reeling effect and tube quality by bringing a toe-in angle of the roller axis of reel rollers to be large in biting a tube and to be small after biting. CON...
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JP02112804 |
PURPOSE: To efficiently improve quality by cooling an elongated pipe material to a specific temp. or below from the specific temp. region, then reheating the material to the temp. region below ≤β transus and above a specific temp. and...
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JP02108402 |
PURPOSE: To obtain a tube stock with no surface flaw and to improve the tube manufacturing efficiency and yield by working the stock by specifying a working ratio of an ingot and a surface temp. at finish of the working. CONSTITUTION: A ...
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JP02104404 |
PURPOSE: To efficiently manufacture a titanium seamless tube in a continuous line by piercing and rolling a conjugate billet for which the peripheral surface of a titanium core stock is covered with an iron base metal at a temp. lower th...
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JP02104405 |
PURPOSE: To prevent generation of improper wall thickness and to obtain a metal tube with good accuracy by drawing the tube by setting a face angle of a reeling part and a face angle of an outlet side part to a pass line of plural cross ...
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JP02070339 |
PURPOSE: To form the diameter of a rolling roll to several times of a metallic bar and to raise the production efficiency by using the rolling roll having plural pieces of annular grooves in the peripheral direction of the outside periph...
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JP02070338 |
PURPOSE: To manufacture a spiral fin by one process by using a rolling roll in which a depth direction angle of an annular groove in the rolling roll against a pass line of a solid metallic bar is roughly vertical toward the entry and in...
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JP02041706 |
PURPOSE: To reduce the outside diameter of a metal tube to a prescribed size in highly accurate roundness by pressing plural rolling rollers onto the outside surface of the tube and rotating the rollers at a high speed around the tube. C...
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JP02041707 |
PURPOSE: To eliminate a tube rotating device and to reduce a rolling cycle time by concurrently performing reverse transfer and turning by a prescribed angle by reversal rolls given an adjusted skew angle after a 1st rolling for a tube s...
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JP02034752 |
PURPOSE: To manufacture a seamless pipe stock by a simplified process, by subjecting a billet of pure Ti or alpha or alpha plus beta Ti alloy to heating, piercing, incline drawing rolling, plug mill rolling, and finish working at the tam...
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JP02034240 |
PURPOSE: To prevent the generation of excessive force by comparing the radial forces generated on the rolls of a roll pair with each other and, in the case the forces are over the allowable deviation force, adjusting the force along the ...
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JP02025204 |
PURPOSE: To improve the yield and the quality of a product of a seamless steel tube by varying a roller interval of the inlet side and the outlet side of a rolling roll when the rolling material is being rolled. CONSTITUTION: By a pair o...
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JP01321002 |
PURPOSE: To prevent a slanting phenomenon of the rear end caused by eccentric heating by forming the rear end of a round billet into a slant shape in accordance with eccentric heating in the circumferential direction. CONSTITUTION: A rou...
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