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Patent Searching and Data


Matches 851 - 900 out of 2,078

Document Document Title
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  
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  
JPH0654402U  
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  
JPH06172858A
PURPOSE: To obtain a seamless steel tube excellent in SCC resistance and having high strength and high toughness by specially controlling steel components and hot rolling conditions, respectively. CONSTITUTION: A billet of a steel which ...  
JPH06170415A
PURPOSE: To improve the roundness without changing rolls at an arbitrary external diameter by rotating and revolving plural recessed rolls having a radius larger than a pipe radius each. CONSTITUTION: Plural inclinable recessed rolls hav...  
JPH06172854A
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...  
JPH06154816A
PURPOSE: To provide a method for manufacturing a seamless steel tube by which the drastic modification of equipment is not required and the inside flaw due to forging crack is not generated by re-suppressing the generation of forging cra...  
JPH06153200A
PURPOSE: To measure at which position a drilling roll tip is set with with a mill center as a reference. CONSTITUTION: The measuring equipment is made up of a sensor head 4 of a semiconductor position detector set to an exit of a berth t...  
JPH06142719A
PURPOSE: To make it possible to measure at which position a roll shaft center is to a mill center as reference. CONSTITUTION: In a centering measuring instrument of a piercing mill to measure the position to the mill center of the roll 1...  
JPH06142722A
PURPOSE: To measure the pass center of bar steadyer with high accuracy and in a short time. CONSTITUTION: This device consists of a laser beam emitting device 2 to irradiate laser beam which is provided on the inlet side of the bar stead...  
JPH06142749A
PURPOSE: To restrain the generation of shoe mark caused by seizure of a guide shoe. CONSTITUTION: A method for lubricating the outer surface of a seamless tube is one, which a lubricator composed of water solution containing 10-60wt.% me...  
JPH06142721A
PURPOSE: To measure the pass center of bar steadyer with high accuracy and in a short time. CONSTITUTION: This device consists of a laser beam emitting device 2 irradiating with laser beam in the opposite direction which is provided on o...  
JPH06142720A
PURPOSE: To simultaneously measure not only the roll center of bar steadyer but the parallelism to the mill center. CONSTITUTION: This device consists of a laser beam emitting device irradiating in the opposite direction with laser beam ...  
JPH06126323A
PURPOSE: To descale the inside surface of a pipe while preventing the generation of specks and pits on the inside surface of the pipe by injecting an inert gas in the direction opposite from the injection of high-pressure water. CONSTITU...  
JPH06114410A
PURPOSE: To reduce the generation of rolling defect and to obtain a high chromium steel seamless tube excellent in the quality of the inside surface of tube by applying water glass or executing aluminum coating on the inside surface of a...  
JPH06106209A
PURPOSE: To provide a piercing rolling method for a seamless steel tube by which even hard-to-work material can be efficiently piercing rolled at a low cost. CONSTITUTION: In a method by which the seamless steel tube is piercing rolled u...  
JPH0699204A
PURPOSE: To drastically improve the yield of product in the manufacture of a seamless steel tube by an inclining rolling method. CONSTITUTION: In the stage of design of a billet which is fed to a inclined rolling mill, the equivalents 7 ...  
JPH0699206A
PURPOSE: To efficiently display the burning prevention effect of lubricant, to reduce the cost and time required to repair flaw on the surface of product and decrease the wear of guide shoes at the time of executing piercing rolling of a...  
JPH0623611U  
JPH0688128A
PURPOSE: To obtain an austenitic fine-grained structure only by seamless rolling. CONSTITUTION: High temp. hollow steel pipe stock produced by subjecting a slab heated to a high temp. to piercing and rough rolling is cooled to the Ar3 po...  
JPH0679310A
PURPOSE: To prevent flaw on the inside surface of tube that is disadvantageous in respect of cost and productivity by rolling after spraying a lubricant solution of a specified concentration of water glass which is diluted with water in ...  
JPH0663614A
PURPOSE: To decrease scratch on the inner surface and to reduce the variation of wall thickness by making the region equivalent to the reeling part of a plug an inverse hyperboloid of revolution shape and using this plug in combination w...  
JPH0655204A
PURPOSE: To improve both a biting property and the quality of internal surface in a rolling by using an inclining roll. CONSTITUTION: In a method manufacturing a seamless tube for which a material to be worked 4 is bitten between plural ...  
JPH0612931U  
JPH069693B2  
JPH069707U  
JPH0623408A
PURPOSE: To enable high degree lubrication by rolling after the uniformizing treatment of a lubricant which is applied to a material to be rolled and leaving it for a specified time. CONSTITUTION: The material 1 to be rolled is piercing ...  
JPH0615311A
PURPOSE: To prevent the seizure of a lubricant, to eliminate the repair of flaws on the surface of a product and to save the used quantity of the lubricant, as well in the case of rolling a steel tube while feeding the lubricant to disk ...  

Matches 851 - 900 out of 2,078