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Patent Searching and Data


Matches 851 - 900 out of 2,058

Document Document Title
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...  
JPH0647123B2  
JPH0647124B2  
JPH0647125B2  
JPH0647126B2  
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...  
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 ...  
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...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
JPH0623611U  
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 ...  
JPH064165B2  
JPH06513A
PURPOSE: To prevent inside surface flaw by rolling after increasing the facial angle at the inlet of roll within the range of biting limit that is determined from a draft at the tip of plug at the same time of biting. CONSTITUTION: A hol...  
JPH06243B2  
JPH06164Y2  
JPH06162Y2  
JPH06163Y2  
JPH0587323B2  
JPH0587324B2  
JPH05329514A
PURPOSE: To reduce a manhour to remove lubricant left on the periphery of a mill after rolling when rolling is performed as lubricant is supplied to disk roll type guide shoes in a skew piecer. CONSTITUTION: Aqueous solution 7a of 0.8l/m...  
JPH0586286B2  
JPH0586284B2  
JPH0586285B2  
JPH0586287B2  
JPH0585242B2  
JPH05317921A
PURPOSE: To lessen the generation of inside surface flaws by suppression of the formation of the secondary scale on the inside surface of a steel pipe and the lubricating effect of the oxide of additive metallic powder. CONSTITUTION: The...  
JPH05309401A
PURPOSE: To rapidly execute changing work by providing a rotary housing to which a backup ring is fitted and supported, providing an attaching/detaching rod, revolving device and fastening nut and cutting a groove which is fitted to the ...  
JPH05309407A
PURPOSE: To eliminate torsion and buckling in a shaft material and to eliminate the problems of whirling, defective biting and breakage of pusher head by biting the shaft material into a rotary elongator after beforehand revolving it bef...  
JPH05305311A
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...  
JPH05305310A
PURPOSE: To reduce the uneven wall thickness and produce less inner surface flaws during the inclined drawing and rolling operation. CONSTITUTION: The length Lt of the part where a plug is brought into contact with the material is set 6...  

Matches 851 - 900 out of 2,058