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Patent Searching and Data


Matches 651 - 700 out of 2,175

Document Document Title
JP2900795B2  
JP2898775B2  
JP2900804B2  
JPH11123420A
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...  
JPH11114609A
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...  
JP2884321B2  
JP2880991B1
[Summary] Subject The punch unit which makes possible improvement in plug life and punching material inside quality improvement in the punching process of a metal long column object is offered. Solution means While considering it as the ...  
JP2880385B2  
JPH1181903A
To prevent the generation of secondary flow between cascade while reducing thickness of a boundary layer by providing a center part in a blade body, providing a suction hole in the back surface of the blade body so as to suck the steam o...  
JPH1177117A
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 ...  
JP2864397B2  
JPH1157705A
To conduct volume filtration by making it difficult for a clad to intrude into a filter, to efficiently filter off the iron clad without precoating it and to remove the iron clad with a large throughput for a long time. A cylindrical fil...  
JPH1159321A
To reduce the electric capacity of a boosting circuit, and to reduce the scale of the circuit, by reducing the number of pieces by supplying the output of a constant-voltage circuit supplied by a battery, to plural sub-control circuits a...  
JP11057842A
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...  
JP2857312B2  
JPH1143707A
To produce a quenched and solidified powder having uniform quality by blowing gas jet against the molten metal stream flowed down from a raw material vessel, dividing the molten metal into molten drips and pouring the divided molten drip...  
JP2844924B2  
JP2831865B2  
JPH10314812A
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...  
JP2827129B2  
JPH10286620A
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...  
JP2815749B2  
JPH10249409A
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...  
JPH10249412A
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...  
JP2580519Y2  
JPH10235413A
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...  
JPH10237604A
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...  
JPH10235422A
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...  
JPH10224090A
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...  
JPH10180310A
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...  
JPH10180315A
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...  
JPH10180312A
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...  
JPH10180314A
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...  
JPH10180313A
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...  
JPH10180311A
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...  
JPH10175049A
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...  
JPH10166124A
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...  
JP2767326B2  
JPH10505789A
(57) the 脱 gas of the summary book invention is pretreated and carried out, and the molten steel of the deoxidized necessary chemical constitution, It is related with the production method of a hot-working joint non-pipe which cast rar...  
JPH10140238A
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....  
JPH10130687A
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 ...  
JPH10128412A
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...  
JPH10128427A
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 ...  
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  

Matches 651 - 700 out of 2,175