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Patent Searching and Data


Matches 451 - 500 out of 1,204

Document Document Title
JP08215715
PURPOSE: To execute skew rolling of a metallic tube stably and at high efficiency. CONSTITUTION: A skew rolling device 13 has an inclined-angle imparting motor 26 for imparting an inclined angle β to forming rolls 20, roll-driving torqu...  
JP08215716
PURPOSE: To provide a plug material excellent in erosion resistance and crack resistance for obtaining stably and efficiently the excellent quality of a product pipe in the manufacture of a high alloy seamless steel pipe, and to provide ...  
JP08215714
PURPOSE: To prevent the generation of flaws on the outside of a shell due to miss roll and burning, to improve production efficiency and to extend performable range even when the thin-walled hollow shell is rolled at high expansion ratio...  
JP08206707
PURPOSE: To secure the internal quality of products with a mandrel mill by executing one pass of elongating/rolling in a one stand mill consisting of four rolls. CONSTITUTION: This mill consists of a pair of upper and lower rolls 1 and a...  
JP08209245
PURPOSE: To obtain a seamless steel pipe excellent in cold workability at a low cost by reheating a pipe stock constituted of an austenitic stainless steel in which the content of C is regulated, subjecting the same to hot rolling at a s...  
JP08206711
PURPOSE: To change a plug at the stage when the life of the plug is expired without monitoring the damaged state by measuring the surface temp. at the tip of the plug after rolling and before cooling and changing the plug at the point of...  
JP08206710
PURPOSE: To more effectively prolong the life of a plug by optimizing the coating quantity of a lubricant on the surface of the plug in accordance with rolling conditions. CONSTITUTION: As for the coating quantity of the lubricant on the...  
JP08197114
PURPOSE: To secure a state lubricated with fluid so that the scale on the surface of a plug can be protected on the surface of the plug and to prolong the life of the plug by applying a lubricant consisting of a water-glass base water so...  
JP08197113
PURPOSE: To prolong the life of a plug by applying a water-glass base lubricant whose viscosity is specified at a specified temp. on the surface of the plug. CONSTITUTION: When the plug 12 is situated in front of lubricant applying heade...  
JP2543283
PURPOSE: To provide the process for production of the thin electric resistance welded steel pipe having the excellent roundness at the end of a small steel pipe. CONSTITUTION: Rolls are divided by ≥4 and the roll diameters are equaled ...  
JP08174013
PURPOSE: To obtain a hollow tube stock minimized in eccentric spiral thickness deviation by specifying the relationship between the diameter of a hollow billet and the interval between inclined rolls at the time of obtaining the hollow t...  
JP08174051
PURPOSE: To greatly decrease the voids from a joint boundary by cold drawing a blank in the state of coupling the mouth drawing part of an outside pipe and the mouth drawing part of an inside pipe, then sufficiently soaking and heating t...  
JP08155505
PURPOSE: To avoid the increase in the working degree in the two roll stand rows, and to reduce the bar changing work and the cost by changing the wall thickness as large as the wall thickness change of a finished tube on the stock tube s...  
JP2526447
PURPOSE: To offer a planetary reeler for improving the shape of inside surface and accuracy of thickness of tube which is rolled with a rolling mill of mandrel mill. CONSTITUTION: The planetary reeler A is arranged on the downstream side...  
JP08117819
PURPOSE: To enable the secure improvement of the life of a plug by applying lubricant made from water glass solution after a water film on the surface of the plug vaporized. CONSTITUTION: In an inclined rolling mill, rolling rolls are ar...  
JP08117817
PURPOSE: To easily prolong the life of a tool for a hot working, such as a plug for rolling a seamless steel pipe to be used under a severe condition like the rolling of a high alloy steel. CONSTITUTION: In the inclined rolling method fo...  
JP08117818
PURPOSE: To improve the life of a plug by applying lubricant on the whole surface of a plug before a rolling stock is rolled. CONSTITUTION: In an inclined rolling mill 10, piercing is performed with upper and lower rolling rolls 11 arran...  
JP08117814
PURPOSE: To provide a manufacturing method of a seamless steel pipe of excellent performance at high productivity with inexpensive equipment and manufacturing equipment train therefor. CONSTITUTION: A round billet is directly manufacture...  
JP08117815
PURPOSE: To improve the durability of a piercing plug in manufacture of a seamless steel pipe and to prolong its life. CONSTITUTION: A hollow base stock is made by hot piercing a billet consisting of alloy steel with the piercing plug an...  
JP08103808
PURPOSE: To provide the easy, safe and precise aligning method. CONSTITUTION: In the aligning method of rolling mill which executes measurement from the reference face of a housing 1 by use of a jig 14, while the jig 14 is placed between...  
JP08090258
PURPOSE: To prevent the cracking of the outer shell and the generation of the defective joining by heating an outer tube immediately before achieving the incline rolling so as to be higher in temperature compared with an inner tube by an...  
JP08090013
PURPOSE: To simplify a roll elevating/lowering mechanism and to contrive the space-saving and improved rigidity of the main body of a forming-roll supporting machine by rotating forming rolls having high cross angles in the converging di...  
JP08066703
To reduce an outer diameter or a wall thickness by rolling a cylindrical hollow body, which is fed into an Assel mill from a front part, by approaching a prereducer roll to the hollow body at a specified adjusting speed to be slowly and ...  
JP08066704
To provide a method for diagonal piercing rolling which is capable of averting the incorrect rolling and working hindrance of thick or thin tube stocks of an about middle extent and a diagonal piecing roll stand for this purpose. This ma...  
JP08057533
PURPOSE: To provide a clad bar, which has a proper thin diffusion layer in its joined part, and a manufacture thereof. CONSTITUTION: First, descaling is performed on the inner surface of a titan pipe and the outer surface of a copper rou...  
JP08052555
PURPOSE: To provide a continuously cast billet for seamless stainless steel pipe base stock, by which an inner surface flaw of the pipe does not develop at the time of pierce-rolling, by shifting the internal gap developed at the last so...  
JP08047738
PURPOSE: To make it possible to apply a rolling process to semiprocessed products having a shoulder part or a stepped part which is annularly protruding as well by performing each rolling process in a transversing direction to the semipr...  
JP08039119
PURPOSE: To enable control so as to obtain a target pipe outside diameter by determining the set change rate of a pipe surface temp. in accordance with specific equation from the error in the outside diameter of the pipe calculated from ...  
JP08039106
PURPOSE: To suppress the variation of the outside diameter of tube in the logitudinal direction after rolling in high-expansion rolling with an skew rolling mill by rolling a tube lowering the rolling temp. in the tip part of a material ...  
JP08024929
PURPOSE: To provide a rolling control method of a reeler capable of providing a tube of uniform length after passing a sizer. CONSTITUTION: A control device 7 obtains the mean wall thickness of a hollow shell H on the outlet side of a pl...  
JP08025063
PURPOSE: To provide a process for producing a different material pipe joint of a large diameter having excellent joinability and joint strength. CONSTITUTION: A cylindrical intermediate layer material 12 consisting of a zirconium materia...  
JP08024911
PURPOSE: To improve condition of the inner surface of a tube in an expansion rolling device, by providing the tip end of a pusher with a port for jetting water for the purpose of descaling the inner surface of a hollow tube stock and/or ...  
JP08024910
PURPOSE: To enable miniaturization of installation area, to reduce heating tem perature for compensating temperature drop of a rolling stock and to supress generation of flaws inside and outside a tube, in an inclined rolling device in w...  
JP08024912
PURPOSE: To enable a high expansion rolling with a high roundness by making the radius of curvature a single value around the pass line on the shoe face of a guide shoe at each position in the direction along the pass line of the guide s...  
JP08001211
PURPOSE: To continuously execute uniform lubrication by gradually feeding a grease-like lubricant between the inside surface of tube stock and a plug during reeling and rolling a tube, to drastically increase the number of tubes rolled u...  
JP08001210
PURPOSE: To manufacture a seamless tube without the occurrence of a defect even in the case of a high expansion ratio. CONSTITUTION: A billet B is fed in the axial length direction, is rotated helically and is moved by the rotations of b...  
JP07328707
PURPOSE: To support the outside diameter of a hollow shell by fastening support rolls to an interval where the hollow shell is not pressed and not held after the end part of hollow shell is passed through the support rolls. CONSTITUTION:...  
JP07314014
PURPOSE: To provide equipment and a method for rolling a seamless tube and for drastically improving the precision of the inside surface. CONSTITUTION: In the equipment for rolling a seamless tube for obtaining a prescribed outside diame...  
JP07314015
PURPOSE: To drastically improve the precision of the inside surface and also to unnecessitate a plug mill and reeler or a mandrel mill to be arranged in front of a forming mill. CONSTITUTION: The forming mill 1 with which the various siz...  
JP07308703
PURPOSE: To reduce internal scab generated at the time of rolling martensitic stainless steel or duplex stainless steel with an elongator. CONSTITUTION: When a tube stock 4 made of martensitic stainless steel (or duplex stainless steel) ...  
JP07303906
PURPOSE: To enable rolling at different tube expanding rate with out changing a guide shoe and with a same-shaped shoe by inclining the shoe to the rolling direction of the tube in accordance with the target tube expanding rate. CONSTITU...  
JP07303907
PURPOSE: To manufacture a steel tube having high roundness over the entire length by dividing sizer rolls of the final stand into four in the circumferential direction of pipe and executing drawing by changing the ratio of the base diame...  
JP07303905
PURPOSE: To execute highly expanding/rolling without hindering yield and productivity by satisfying an equation which shows that there is the optimum range in the relationship between the ratio of a roll diameter and the outside diameter...  
JP07284817
PURPOSE: To prevent seizure flaws or the like caused by the burning on the surface of a guide shoe and to improve the quality by rolling a material to be rolled while supplying the aq. solution of swelling mica at least one place between...  
JP07284818
PURPOSE: To prevent the generation of internal surface flaws by measuring the advancing speed of a material to be rolled or the axial load of plug and adjusting the supply of an antislipping agent based on the increase and decrease of th...  
JP07275912
PURPOSE: To prevent the generation of bad biting, bad running-out and the rupture of hollow by satisfying a specified relation by the wall thickness on the inlet side of a hollow tube stock of a material to be rolled, wall thickness of t...  
JP07275908
PURPOSE: To correct the thickness deviation of a tube stock after rolling by making the outside surface on the backside of a plug into a reeling part which is composed of a concave hyperboloid of revolution and making the distribution in...  
JP07275913
PURPOSE: To prevent the generation of bad biting, bad running-out and the rupture of hollow by satisfying a specified relation by the wall thickness on the inlet side of hollow tube stock of a material to be rolled, wall thickness on the...  
JP07275954
PURPOSE: To prevent the development of a linear flaw on the surface of a steel tube by making a hoop steel after bending almost the triangular steel tube constituted with three large arcs and three small arcs, in the mechanism for formin...  
JP07265910
PURPOSE: To suppress generation of spiral uneven thickness as well as shear deformation by reversing a rotating direction of the stock to be rolled of one or more skew rolling processes against a rotating direction of the stock to be rol...  

Matches 451 - 500 out of 1,204