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Patent Searching and Data


Matches 351 - 400 out of 1,204

Document Document Title
JP11244913
To provide a piercer capable of improving the service life of a plug and the quality of the inside surface of a material to be pierced in the piercing stage of a metallic long colume body. In this device, the plug 1 is made into the shap...  
JP2973885
To obtain a method for drawing, reducing and sizing a seamless metallic tube by which defective bar stripping is not generated even when drawing, reducing and sizing are executed, by using a size capable of interstand tension imparting r...  
JP11197715
To enlarge the possible manufactural length of a seamless steel tube. In the boring method of the seamless steel tube by an inclined roll, a boring plug 2 is arranged so that the maximum diameter part 2a is positioned in a gorge part 1b ...  
JP11188408
To stably manufacture electric-resistance-welded steel pipes with superior roundness without reducing the manufacturing efficiency with necessary minimum rolls by reducing the weld zone with horizontal rolls immediately after heating/sof...  
JP11169914
To prevent the generation of internal carbunization and also to improve the quality of the inside surface by regulating the temp. of the inside of a material to be pierced just before rolling with the 2nd piercer (elongator) within a ran...  
JP11123420
To absorb the fluctuation of a rolling load at the time of an abnormal rolling in manufacturing a seamless steel tube, and to simply repair the equipment of the rolling mill. On the rolling down device of this rolling mill, hydraulic cyl...  
JP11114609
To obtain a rolling mill to cope with the production of small quantities in many kinds of seamless steel tubes sized from a small diameter to a large diameter by providing a means of turning a cannon holder and making it travel along a p...  
JP11090511
To provide the method and device for manufacturing a seamless steel tube made of an Fe-base alloy whose Cr content is <15 wt.%, which are immediately applicable to existing manufacturing equipment by which a product steel tube reduced in...  
JP11077117
To increase the relative thermal capacity ratio of a piercing plug, to suppress the loss of the plug including the loss of the tip and surface roughening of the trunk part and to prolong the life by taking the crossing angle of inclined ...  
JP11057842
To obtain a method of manufacturing a steel pipe; wherein a special adjustment of measurements of the pipe is substantially not required for a final cold finishing working, and compressive strength in the direction of the pipe's length i...  
JP11050148
To obtain a steel pipe with high strength and high corrosion resistance by subjecting a steel having a specified componental compsn. to steel pipe forming and direct quenching under specified conditions and refining it to required streng...  
JP10314812
To provide a manufacturing method of a seamless tube that is excellent in the durability of piercing plug. In this manufacturing method, a billet is arranged on the pass line of roll which are arranged obliquely to the advancing directio...  
JP10286620
To provide a manufacturing method for a welded steel pipe by which yield ratio in the axial direction of the tube that is only raised in the manufacturing process in a conventional method is lowered. In the manufacturing method of the we...  
JP10249412
To obtain a piercing plug for a seamless metallic tube which restricts an adopted fault generating on the inside surface of a product tube and which does not reduce the life of the plug by making the thickness of scale skin film of a ree...  
JP10249409
To manufacture plural kinds of metallic tube with spiral projections having different wall-thickness without changing rolling rolls. In this manufacturing method, a solid metallic bar or metallic tube of hot pierced or stretched with a s...  
JP10237604
To prevent cracking at the time of blooming and to provide excellent sulfide stress cracking resistance by specifying respective contents of C, Si, Mn, P, S, Cr, Ni, Al, N, Mo, and Cu and also specifying cast bloom temp. in the course of...  
JP10235422
To effectively improve the bar-stripping property even when the coefficient of friction between a mandrel bar and a shell is varied by changing the properties of the surface of the mandrel bar. Tension which acts on the shell A between m...  
JP10235413
To provide a method and device for manufacturing a seamless steel tube by which the life of a plug used for piercing is drastically prolonged. In the manufacturing method of the seamless steel tube including hot piercing stage, at the ti...  
JP10224090
To suppress incorrect follow-up of a cam follower with respect to a tubular cam while enhancing durability through a simple structure by constructing means for urging one cam follower toward the tubular cam side of a leaf spring. Under a...  
JP10180313
To roll a hard-to-work tube stock such as Ni-base alloy without generating plastic deformation on a mandrel. This rolling method is composed so that the tube stock H is drawn while imparting tensile force to the tube stock H from the fro...  
JP10180311
To provide a method for preventing the slip of piercer rolls by jetting a slip preventing agent to a round bar and the piercer rolls in piercing with a piercer. In the method for preventing the slip of the piercer rolls 1, the current va...  
JP10180310
To prevent generation of inside surface scratch of steel tube and to manufacture seamless tube with excellent inside surface skin by manufacturing a rolling stock for seamless tube of specified shape and then piercing rolling the rolling...  
JP10180312
To prevent generation of defects such as crack in the end part of a tube stock and the like due to δ ferrite at the time of piercing rolling of cast billet for seamless tube with a piercer by rolling billet under satisfying specified co...  
JP10180314
To roll a hard-to-work tube stock such as a Ni-base alloy tube without generating cracks on the inside surface. This rolling method is composed so that the tube stock is drawn while imparting tensile force to the tube stock H from the fr...  
JP10180315
To obtain a plug with much more improved life time than in the conventional are under a severe condition of being constantly exposed to high temperature and high load by changing a part of plug located at the outermost surface of plug wi...  
JP10175049
To eliminate the defect of internal quality of a cast billet, to improve the production efficiency of a seamless steel pipe and to reduce the production cost by continuously casting a steel containing a prescribed wt.% or higher of Cr wi...  
JP10166124
To provide a producing method for a round cast billet which eliminates porosity and solidified structure, improves the internal quality of the cast billet and fully prevents the inner flaw at the time of pipe-making. The producing method...  
JP10140238
To produce a seamless steel tube for an accumulator for air bag system, excellent in workability and weldability and having high strength and high toughness. A steel, having a composition consisting of 0.01-<0.20% C, ≤0.50% Si, 0.30-2....  
JP10130687
To obtain a lubricant compsn. for hot working which can reduce the coefficient of friction between a working tool and a workpiece and prolong the service life of a working tool in hot working, such as tilting rolling of a seamless steel ...  
JP10128427
To minimize the roughness of the outer surface of a seamless steel tube, to minimize the polishing work or the like in off-line and to save labor by jetting a high pressured water on the outer surface of a hot tube under carrying before ...  
JP10128412
To provide a manufacturing method of 13 Cr base stainless steel tube covered with mill scale excellent in surface property and corrosion resis tance by controlling scale in descaling and rolling. About a hollow tube stock of stainless st...  
JP2775029
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...  
JP2770870
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...  
JP10094808
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...  
JP10094807
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...  
JP10085804
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...  
JP10080715
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...  
JP2754999
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...  
JP10058014
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...  
JP10058013
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...  
JP10043803
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...  
JP10034304
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...  
JP10015604
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 ...  
JP10005820
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...  
JP2730460
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...  
JP2729209
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...  
JP09314206
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...  
JP09310121
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...  
JP09300006
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...  
JP09300007
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...  

Matches 351 - 400 out of 1,204