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Patent Searching and Data


Matches 1,001 - 1,050 out of 2,092

Document Document Title
JPH0596308A
PURPOSE: To make a sizer which is used for manufacturing a seamless steel tube so that it can be used for both of 2-roll and 3-roll sizers while screw down device and driving system are used in common. CONSTITUTION: A housing 11 for 3-ro...  
JPH0523842B2  
JPH0569012A
PURPOSE: To prevent defective biting by retracting a plug to the outlet side of rolls by narrowing the roll gap after the tip of a tube stock is bitten between the rolls and advancing the plug by enlarging the roll gap after the end of t...  
JPH0570782A
PURPOSE: To prevent carburization, which tends to be a problem when graphite lubricant is used, and to prevent the dents on the inside of a pipe due to oxide scale. CONSTITUTION: A mixture of a calcium compound and graphite is used as th...  
JPH0569011A
PURPOSE: To prevent misrolling by specifying the relationship between the diameter of a base stock for material to be rolled, distance from the starting position of gripping the base stock with inclined rolls to the tip of a plug, cleara...  
JPH0520165B2  
JPH0520163B2  
JPH0520164B2  
JPH0510963Y2  
JPH0510962Y2  
JPH0557307A
PURPOSE: To prevent intern surface flaws by reducing slip between a material to be rolled and rolls without impairing the surface properties of the external surface of the material to be rolled and without changing the setting of rolling...  
JPH0550117A
PURPOSE: To suitably control the length of a steel tube through a sizing mill of the final stage of rolling by fixing stands on the final outlet sides of plural sizing mill stands to the maximum defined number of rotation and making the ...  
JPH0542308A
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...  
JPH0523711A
PURPOSE: To restrain indentation flaws by inside scales of a hot seamless tube manufactured by piercing and strech-rolling. CONSTITUTION: The inside temperature of the material which is being elongated by rolling is restrained below the ...  
JPH0523710A
PURPOSE: To provide a forge-welded steel tube manufacturing equipment which can manufacture a forge-welded tube with a high efficiency. CONSTITUTION: After a band steel is heated in a heating furnace 5 the band steel is formed into a tub...  
JPH055202U
[Objects of the Invention] Insertion of ring material and extraction provide an easy ring material rolling mill. [Elements of the Invention] While supporting two rolling mill rolls 6 and 7 in housing 1 via drive side axle boxes 2 and 3 a...  
JPH055562B2  
JPH057990A
PURPOSE: To prevent a flow generated in inside of a pipe by casting a cast slab for a continuous casting having the specific value of length ratio of a long side and a short side at a specific temp. and rolling the cast slab at the speci...  
JPH05305A
PURPOSE: To provide means for preventing rolling flaws on the outer surface of tube that bring troubles of cost and productivity in the time of manufacturing a seamless tube of high chromium steel by Mannesmann rolling process. CONSTITUT...  
JPH051085B2  
JPH04371307A
PURPOSE: To secure a prescribed target length by reducing the variation in length in the final stage of rolling. CONSTITUTION: The actual length of a base stock which is obtained in the stage just before the final stage of rolling is com...  
JPH04367307A
PURPOSE: To provide a manufacturing method for a two-phase stainless steel pipe excellent in the quality of an outside pipe surface with less rolling scratches. CONSTITUTION: By using a square bloom whose corner parts are preliminarily g...  
JPH0479725B2  
JPH04358025A
PURPOSE: To produce a seamless steel tube having fine-grained structure and excellent in toughness by controlling steel components and hot rolling conditions, respectively. CONSTITUTION: A billet of a steel which has a composition consis...  
JPH0450962Y2  
JPH0475082B2  
JPH0472601B2  
JPH04319002A
PURPOSE: To provide a small inclined planet roll device with high rigidity by restraining fixing one of two input shafts. CONSTITUTION: One or more kinds of working rolls 1, back up rolls 2 or reinforced rings 5 are driven. At the time o...  
JPH04319006A
PURPOSE: To prevent the generation of the outside surface flaw and inside surface flaw of rolled stock by reducing slip between rolls and a material to be rolled in a Mannesmann type inclined piercer. CONSTITUTION: Rolling is executed by...  
JPH04316831A
PURPOSE: To efficiently subject a shaft material such as a pipe material or a rod material to twist elongation processing at a high speed by selecting a path so as to specify the surface twist angle of the shaft material on an outlet sid...  
JPH04316750A
PURPOSE: To simplify the structure of a machining device and to reduce the size thereof by locating the drum part of a plurality of sets of rollers so that the rollers are brought into contact with the inner surface of a friction ring mo...  
JPH04309402A
PURPOSE: To obtain the seamless steel pipe having the performance equal to the performance of a SUS 304 stainless steel by using a SUS 304L stainless steel without executing a soln. heat treatment. CONSTITUTION: This invention relates to...  
JPH04294804A
PURPOSE: To offer a means for restraining the generation of wrinkle-like defects on the outer surface when a solid billet is pierced by hot piercing rolling. CONSTITUTION: The solid billet 4 which is heated in a rotary hearth furnace 1 i...  
JPH0464761B2  
JPH04288995A
PURPOSE: To reduce the shearing strain of a shaft material by constituting a pass so that the work partial charge is migrated continuously from one pair to the other pair in connection with an advance, with respect to two pairs of roller...  
JPH04284904A
PURPOSE: To prevent a cutting surface from being oxidized continuously by atmosphere and to thin the material through hot rolling by carrying out piercing rolling, removal of an oxidized layer, sealing the inside and outside surfaces of ...  
JPH04113101U  
JPH0461722B2  
JPH04274807A
PURPOSE: To prevent the generation of seizure on guide shoe surfaces. CONSTITUTION: The piercing machine 10 constituted by disposing a pair of inclined rolls 11 so as to face each other, disposing a plug 12 at the center of the rolling r...  
JPH04274806A
PURPOSE: To prevent the tube end crack and the rolling trouble, and to improve the rolling work efficiency and the yield of a product, at the time of manufactur ing a seamless alloy steel tube. CONSTITUTION: Common steel square pieces 3,...  
JPH0459982B2  
JPH0459963B2  
JPH04266411A
PURPOSE: To provide a shaft material working device easy to change a pair of rollers by making up a pair of inclined rollers to clamp and advance the shaft material into such a state that they are twisted in a cage as skelton round a pas...  
JPH04266405A
PURPOSE: To enable manufacture of an inside grooved steel tube provided with a reasonable shape though the thickness is large. CONSTITUTION: The manufacturing device of an inside grooved seamless steel tube having a pair of rolling rolls...  
JPH0457401B2  
JPH04254520A
PURPOSE: To offer a method for manufacturing a resistance welded oil well pipe high in the Young's modulus in the circumferential direction of the steel pipe and excellent in crushing properties. CONSTITUTION: This is a method for manufa...  
JPH04254521A
PURPOSE: To manufacture a resistance welded oil well pipe high in the Young's modulus in the circumferential direction and excellent in crushing properties by subjecting the cast slab of a steel having a specified compsn. contg. C, Si an...  
JPH04251604A
PURPOSE: To beforehand prevent the generation of abnormality of peeling, buckling, etc., by restraining bottom flare in the terminal part of tube at the time of skew rolling using a piercer, elongater, etc. CONSTITUTION: The terminal of ...  
JPH04231105A
PURPOSE: To embody elongating and rolling with the highest possible efficiency without the deterioration of quality with a smaller number of roll stands by minimizing the number of the roll stands as far as possible. CONSTITUTION: The ro...  
JPH04224009A
PURPOSE: To manufacture a seamless stainless steel tube excellent in the outside quality of the tube by minimizing surface defects by an elongator and forming titanium film on the surface, whereon flaws do not grow in spite of reduction ...  

Matches 1,001 - 1,050 out of 2,092