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Patent Searching and Data


Matches 851 - 900 out of 2,101

Document Document Title
JPH0732013A
PURPOSE: To effectively operate roll rearrangement and to reduce the entire height of a piercing mill. CONSTITUTION: The device has upper and lower rolls 2, 3 freely ascending and descending by upper and lower rolling-down devices 6, 7 b...  
JPH078365B2  
JPH0726323A
PURPOSE: To produce a seamless steel tube excellent in SSC resistance by specifying chemical components and also limiting hot rolling conditions and cooling conditions, respectively. CONSTITUTION: A steel having specific chemical compone...  
JPH0724508A
PURPOSE: To minimize a gap between a guide disk and a conical roll, to prevent exterior flaw of a material and to improve the accuracy of external size by making a disk shaft case swingable in the pass-line direction, moving the case and...  
JPH0716617A
PURPOSE: To make a roll rearrangement work efficient and to miniaturize a stand. CONSTITUTION: In the stand 1 provided with front and rear housings 1A, 1B, upper and lower rolls 2, 3 which are lifted and lowered with upper and lower scre...  
JPH0718328A
PURPOSE: To provide a manufacturing method of a seamless steel tube having grain fining organization. CONSTITUTION: After a square steel billet is heated to a high temperature of 900 to 1050°C, the billet is rolled with a press rolling ...  
JPH0716618A
PURPOSE: To make a roll rearrangement work efficient and to lower the overall height of a mill. CONSTITUTION: Upper and lower rolls 2, 3 wich are lifted and lowered with upper and lower screw down devices 6, 7 and right and left disks 8 ...  
JPH0718327A
PURPOSE: To provide a manufacture method of a seamless steel tube having grain refining organization. CONSTITUTION: This seamless steel tube having grain refining organization is manufactured as below. After a steel heated to a high temp...  
JPH072257B2  
JPH079013A
PURPOSE: To bore billets having different kinds of major diameters without injuring the outer surfaces by providing at least a pair of guide rolls having a concaved surface each which can adjust interval, crossing angle and revolving spe...  
JPH071010A
PURPOSE: To eliminate a hot saw and to improve the yield of tube manufacturing by pressing down fins, over fillings which are generated by elongating with a mandrel mill and crushing allowance at the time of bar stripping by providing a ...  
JPH06104243B2  
JPH06344009A
PURPOSE: To prevent the generation of inner surface flaw of a seamless steel tube and miss roll by providing spraying nozzles for jetting/supplying an abrasion increasing agent to the tip of the inlet guide for a billet. CONSTITUTION: Sp...  
JPH0646564Y2  
JPH0692630B2  
JPH0692629B2  
JPH0692006B2  
JPH06315703A
PURPOSE: To provide a rolling mill for piercing and elongating of a solid billet with which roll adjustment and exchange are easy. CONSTITUTION: This rolling mill has an open top and an open interior formed by a plurality of vertically e...  
JPH0688050B2  
JPH0685922B2  
JPH06297009A
PURPOSE: To reduce slippage between a material to be rolled and rolls and to prevent the generation of an internal flaw without damaging the surface property of the external surface of the material to be rolled by arranging spray nozzles...  
JPH06297008A
PURPOSE: To facilitate the adjustment and replacement of a two-high cross rolling mill. CONSTITUTION: Each of both bearing modules 9 of each guide disk 4 is arranged in a vertically adjustable fitted module 13 so as to be swivelable arou...  
JPH06277732A
PURPOSE: To enable a reeling so that the length of the tube on the outlet side of a reeler is coincident with the target length on the outlet side of the reeler or the target length on the outlet side of a sizer. CONSTITUTION: An operati...  
JPH06269817A
PURPOSE: To stabilize the rotation of an inclined rolling roll by transmitting driving force through a gear from, a rotary housing to a rolling roll. CONSTITUTION: A rolling device for a metallic long columnar body such as a tube or bar ...  
JPH06262219A
PURPOSE: To provide a disk guide roll excellent in seizure resistance to prevent generation of seizure and an outside flaw and reduction of productivity in the disk guide roll when an alloy steel is rolled for piercing and elongating a s...  
JPH06246329A
PURPOSE: To decrease temp. difference between the surface and the center of a rolled stock by making at least the inner peripheral surface of a cylindrical guide with which the rolled stock is guided of a thermal insulating material. CON...  
JPH06248360A
PURPOSE: To prevent the lowering of calculating precision to temp. of a billet temp. caused by temp. of a furnace hearth at the time of inserting the billet in a rotary furnace hearth type heating furnace. CONSTITUTION: In a control meth...  
JPH06246341A
PURPOSE: To automatically measure and also to correct the shape, that is, the bend, outside diameter and outer peripheral length of an electric resistance welded steel tube without arranging a bend straightening machine. CONSTITUTION: In...  
JPH06238383A
PURPOSE: To efficiently and inexpensively produce a hyperbolic body with smooth curve surface by rotating each form rolling roll and cylindrical base stock around their axial center lines while each form rolling roll is pressed to a cyli...  
JPH0661301U
[Objects of the Invention] By equipping a position just before rolled material is bit by the disk roll with the ON side guide, a good-shaped joint non-metal tube is manufactured, and the inclination rolling mill which raises the yield is...  
JPH06238309A
PURPOSE: To suppress the generation of inside surface flaw without applying graphite lubrication to the inside surface where is the possibility of carburizing by specifying a biting angle that is an angle of contact of the inside surface...  
JPH06218406A
PURPOSE: To provide a piercing/rolling method by which miss roll is not generated during piercing/rolling a material to be rolled and further internal surface flaw of a tubing by forging crack due to rotating/forging effect is not genera...  
JPH06218407A
PURPOSE: To surely roll a sort tube stock with a simple means by introducing the tube stock into a rolling mill with rolls and a pre-reduction equipment and guiding rotation as a fixing clamper. CONSTITUTION: This pre-reduction equipment...  
JPH06210320A
PURPOSE: To make a slip between a rolling roll and a rotary housing small, and to stably perform a friction drive of the rolling roll. CONSTITUTION: A metallic long column body is rolled by using three rolling rolls 1 or more arranged wi...  
JPH06210319A
PURPOSE: To manufacture a seamless steel tube reduced in surface flaws by giving a guide shoe provided on the side surface of a running hot steel tube the vibration of a specific condition. CONSTITUTION: A tube stock HS engaged among the...  
JPH0627201Y2  
JPH0654403U
[Objects of the Invention] Obtain a uniform thick product to a longitudinal direction, without control of real time being possible and moreover producing a crack inside a steel pipe to the material under rolling. [Elements of the Inventi...  
JPH0654402U
[Objects of the Invention] Obtain a uniform thick product to a longitudinal direction, without control of real time being possible and moreover producing a crack inside a steel pipe to the material under rolling. [Elements of the Inventi...  
JPH06198311A
PURPOSE: To prevent the generation of surface flaws due to scale stuck to the outer surface of a billet in spite of the metal of base material and to improve the surface quality of a product tube which is obtained after succeeding rollin...  
JPH06198375A
PURPOSE: To reduce the thermal load of a rolling roll by effectively heating the ring material which is rolled between upper and lower rolling rolls. CONSTITUTION: A guide roll 9 which is brought into contact with a ring material 3 to be...  
JPH06198310A
PURPOSE: To stably manufacture a seamless stainless steel tube having excellent surface quality by a rolling method with which high production efficiency is attained. CONSTITUTION: An oxidation inhibitor 21 which is jetted with jetting n...  
JPH06190408A
PURPOSE: To prevent a perforation defect or the seizure of a rolled stock on a perforator guide shoe from occurring in a mandrel mill by arranging three roll minimizing type cross/oblique mill on the rear surface of the perforator as a m...  
JPH06182426A
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...  
JPH06182428A
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...  
JPH0649202B2  
JPH06180290A
PURPOSE: To provide an apparatus for automatically, effectively and early detecting a surface flaw of a plug for perforating a seamless steel tube such as a heat fused damage, etc. CONSTITUTION: 'A system for scanning a surface of a plug...  
JPH0647126B2  
JPH0647123B2  
JPH0647124B2  
JPH0647125B2  

Matches 851 - 900 out of 2,101