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Patent Searching and Data


Matches 701 - 750 out of 2,059

Document Document Title
JPH0866703A
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 ...  
JPH0866704A
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...  
JPH0857533A
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...  
JPH0852555A
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...  
JPH0847738A
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...  
JPH0839119A
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 ...  
JPH0839106A
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 ...  
JPH0824929A
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...  
JPH0825063A
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...  
JPH0824911A
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 ...  
JPH0824910A
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...  
JPH0824912A
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...  
JPH084811B2  
JPH081211A
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...  
JPH081210A
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...  
JPH07328707A
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:...  
JPH07115050B2  
JPH07314014A
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...  
JPH07314015A
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...  
JPH07308703A
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) ...  
JPH07109008B2  
JPH07303906A
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...  
JPH07303907A
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...  
JPH07303905A
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...  
JPH07106368B2  
JPH07102372B2  
JPH07100162B2  
JPH07284817A
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...  
JPH07284818A
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...  
JPH0798216B2  
JPH07275912A
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...  
JPH07275908A
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...  
JPH07275913A
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...  
JPH07275954A
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...  
JPH07265910A
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...  
JPH07256328A
PURPOSE: To suppress generation of the shoe marks occurring caused by seizure of guide shoes in piercing in seamless pipe production. CONSTITUTION: This method for lubricating outside surfaces in seamless pipe production comprises pierci...  
JPH0787961B2  
JPH0787929B2  
JPH0787930B2  
JPH07246403A
PURPOSE: To change the outside diameter of tube into an arbitrary size in a manufacturing line without generating the torsion and bend on the metallic tube. CONSTITUTION: Planetary type stretch reducers 3a, 3b, 3c in which plural rolling...  
JPH0785804B2  
JPH07241609A
PURPOSE: To suppress the variation in the longitudinal direction of the outside diameter of a tube after rolling by making the rotational speed of disk guide shoes during rolling the tip of a material to be rolled faster than the rotatio...  
JPH07241606A
PURPOSE: To suppress the variation of the outside diameter of tube in the longitu dinal direction after rolling by making the lead angles of rolling rolls during rolling the tip part of a material to be rolled smaller than the lead angle...  
JPH07241608A
PURPOSE: To suppress the variation in the longitudinal direction of the outside diameter of tube after rolling by making the rotational speed of rolling rolls during rolling the tip of a material to be rolled faster than the rotational s...  
JPH07241607A
PURPOSE: To improve the accuracy of external size of tube by setting the temp. of a tube stock on the inlet side of an expansion mill, also determining the actual temp. of the tube stock on the inlet side of this expansion mill, changing...  
JPH07227604A
PURPOSE: To manufacture a high Cr seamless steel pipe of high quality by supplying a ferrous oxide setting an iron oxide as a main component on a plug surface for punch from a billet side. CONSTITUTION: A hollow base stock is adjusted by...  
JPH0735604Y2  
JPH0775726B2  
JPH0735603Y2  
JPH0775727B2  

Matches 701 - 750 out of 2,059