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Patent Searching and Data


Matches 651 - 700 out of 2,130

Document Document Title
JP2752042B2  
JP2750322B2  
JP2775029B2
To provide a device for executing skew rolling of tube-shaped or bar-shaped rolling stock. In order to feed a rolling stock, a roll 2, whose roll axis 4 is, seen in the direction of longitudinal axis 3 of the rolling stock, inclined to t...  
JP2770870B2
PURPOSE: To manufacture an aluminum tube high in out-of-roundness and adequate in surface roughness by working the tube under rolling pressure after the outer peripheral surface of the tube is cut. CONSTITUTION: After the outer periphera...  
JPH1094808A
To provide a roller shoe for inclined rolling mills by which so-called flare (enlargement of the diameter in end parts) in the end parts of a pierced or stretched tube stock in the inclined rolling mill for manufacturing the seamless ste...  
JPH1094807A
To provide the method and device capable of controlling a roll forming based on the weight of a workpiece in a forming device having two oppositely arranged forming rolls constituted so that at least its one roll is moved neare to away f...  
JP2737310B2  
JPH1085804A
To provide a method for manufacturing a seamless tube which consists of an α-type or α+β type titanium alloy containing an inhibstor of the coarsening of structure, whose strength and ductility are higher in the same order in both dir...  
JPH1080715A
To use a steel tube cold worked as it is by controlling a final finish working rate as taking a ratio of a working rate between tube thickness and outer diameter for a parameter when producing a two phase or austenitic stainless steel tu...  
JP2726588B2  
JP2754999B2
PURPOSE: To provide a method and a device for carrying out inclined rolling for nearly eliminating a gap between the inclined roll and a disk roll and preventing down buckling. CONSTITUTION: A billet 6 is rolled for perforation by an inc...  
JPH1058014A
To contrive reduction of flaws on the outside surface to which a guide is related and prolongation of the life of the guide in rolling with an elongator. In the case that a hollow tube stock after piercing with a piercer is elongation ro...  
JPH1058013A
To make hot rolling into one process and to enable cost reduction by making a solid round billet having a diameter not more than a prescribed outside diameter into a hollow tube stock and executing cold diameter reducing/ elongating work...  
JPH1043803A
To extend plug life by using a temp. control means, arithmetic means, controller, etc., in the piercing rolling method of hot seamless metal tube so as to suppress erosion of the tip part and side face part of a plug. An arithmetic means...  
JPH1034304A
To reduce the producing cost of a seamless steel tube containing Cr by using saddle type roll having a prescribed angle range of an opening angle at the caliber bottom in one pair of rolls. Rolling reduction is applied to a cast billet 1...  
JP2703814B2  
JPH1015604A
To remove scale, scraps of tube end or the like which are presented in the interior of a pierced material almost completely and to drastically restrain the generation of pock marks and pits. Between a 1st piercer 1 and the 2nd piercer 2 ...  
JP2696718B2  
JP2697144B2  
JPH105820A
To provide a piercing rolling method of a metallic tube. When the opening degree of main rolls is expressed by Rg, the opening degree of guide members by Gg, the outside diameter of a solid round billet by Bd, the effective length of a p...  
JP2558263Y2  
JP2729209B2
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...  
JP2730460B2
PURPOSE: To improve a peeling limit, and to reduce the generation factor of a guide shoe mark by that the projection of a piercing shell between a main roll and a guide shoe, becomes less. CONSTITUTION: When piercing a seamless steel pip...  
JP2692524B2  
JP2692474B2  
JPH09314206A
To inexpensively obtain the long size hollow bar steel with high dimen sional precision, small diameter and thick wall by making the bar steel a hollow base stock satisfying a specific formula after piercing the bar steel by a pierce, an...  
JPH09310121A
To produce a steel tube excellent in high temp. creep fracture characteristics and toughness by subjecting a steel stock having a specified compsn. to blooming, executing cooling, holding the same under soaking to an austenite single pha...  
JPH09300007A
To prevent defective bite, the contraction of a tube end, and the occurrence of an uneven thickness, and to improve quality and productivity even when piercing rolling a thick tube with high expansion ratio and low ratio of piercing by s...  
JPH09300006A
To manufacture a round cast billet having good endoplasm using existing continuous casting equipment and, next, to manufacture a seamless steel tube difficult to be worked without causing miss roll in piercing and, without generating the...  
JP2718865B2
PURPOSE: To obtain a steel tube as rolled having a fine grain structure of over an austenitic grain size No 8 by cooling after a hollow steel tube stock containing the prescribed quantity of Nb is worked under the prescribed condition wi...  
JP2715396B2
PURPOSE: To improve safety of descaling the inside surface of a seamless steel tube. CONSTITUTION: By this device, a mandrel bar 2 fitted with an injecting nozzle 1 at a tip end is supported by a bar block 3 and fixed on a truck 4 and th...  
JP2671960B2  
JP2672441B2  
JPH09287028A
To provide a method for efficiently producing on-line a seamless steel pipe excellent in the performance, and also provide an on-line equipment therefor having apparatuses from casting to heat treatment. This production method comprises ...  
JPH09276907A
To manufacture an austenitic stainless steel seamless tube by on-line solution heat treatment. After heating a billet of austenitic stainless steel, hot piercing and successively executing finish rolling (elongating work + finishing work...  
JPH09271811A
To provide a method for manufacturing the seamless steel pipe made of a high W duplex stainless steel. After heating a billet made of a duplex stainless steel, containing W of 1.5wt.% or higher and 5wt.% or lower in a temperature range i...  
JPH09271810A
To prevent generation of flaw on an external surface by specifying so that a radius of a corner part of slab has a specified ratio to a side length when a martensitic stainless steel slab is pierced by a press roll piercer. A martensitic...  
JP2550896Y2  
JP2550897Y2  
JP2705499B2
PURPOSE: To improve the quality of an inside surface and to reduce the maintenance cost as to the inside surface. CONSTITUTION: In a method in which a hot drawn seamless carbon steel tube is manufactured by drawing it to reduce the thick...  
JP2661490B2  
JP2662122B2  
JPH09248605A
To reduce the defective ratio of a hollow stock tube and to improve the yield by predicting the fusing damage of the tip part of a plug based on the measured result of a measuring means of a billet progressing velocity and a measuring me...  
JPH09239416A
To surely prevent the generation of inadequate pullingout of a mandrel without frequent control action during operating a retract mandrel mill and to stably execute the pulling-out of the mandrel over a long period. During operating roll...  
JPH09220603A
To highly efficiently manufacture a thick-wall seamless steel tube having the highly precise dimension of an outside diameter by restricting the variation of outside diameter by a plug mill, controlling the temp. of a stock tube to a pre...  
JP2643369B2  
JP2641834B2  
JPH09201604A
To provide a method by which a seamless tube without a carburized layer on its inside surface is highly efficiently manufactured. Rough rolling with a mandrel mill using a graphitic lubricant, reheating and finish rolling with a stretch ...  
JPH09108712A
To prolong the life of a guide shoe, in rolling a seamless steel tube by a inclined rolling mill, by providing a water passage inside the guide shoe of the rolling mill and rolling with this passage cooled by water. A crank-shaped water ...  
JPH09108711A
To eliminate uneven thickness produced in base stock, forming and bead grinding, to allow on-line tube making of a steel tube having a satisfactory dimensional precision comparable to a conventional drawn tube, and to obtain a technology...  

Matches 651 - 700 out of 2,130