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Patent Searching and Data


Matches 851 - 900 out of 1,202

Document Document Title
JP63220907
PURPOSE: To prevent the generation of a hole and to improve quality by increasing the advancing amt. of a plug by moving it the reverse direction to the progressing direction of a rolling blank stock at the initial piercing time of the r...  
JP63220909
PURPOSE: To prevent thickness deviation and streak and to improve quality by elongating a rolled hollow stock with the roll roll-fitted to the outer periphery of a rolled stock with supporting a plug by its tip side and base end side. CO...  
JP63212006
PURPOSE: To arrange short fibers in the peripheral direction of a tube and to reduce thermal expansion in the radial direction by performing ring rolling work after forming an FRM billet of a thick wall tubular shape by pressure casting....  
JP63203205
PURPOSE: To improve a plug life and to efficiently obtain a stock pipe having good inside surface quality and dimensional accuracy by joining a tip part consisting of an Mo-base alloy to a plug body part consisting of an alloy having spe...  
JP63188411
PURPOSE: To perform quick opening of a gap between main rolls without increasing the capacity of a driving system by making a drafting nut movable in only the axial direction of a screw shaft and making the nut movable in the reverse dir...  
JP63183707
PURPOSE: To form high quality tubes having no thickness deviation by maintaining respective specific relations of a skew roll outlet face angle, an angle of a plug reeling part, and a guide shoe outlet face angle to the path center of a ...  
JP63177906
PURPOSE: To permit diametral reduction of a pipe with high accuracy by arranging plural pieces of tapered rollers to the tapered inner peripheral face of a rotary die and rotating the die so that the rollers make planatary motion around ...  
JP63157705
PURPOSE: To prevent generation of defects on the inside surface of a stock pipe after piercing by inserting a plug into the solid billet in the direction not against the V-segregation zone therein and piercing and rolling the solid bille...  
JP63154206
PURPOSE: To make the operation effective by rotating a couple of skew rolls in the normal and the reverse directions and putting pluge supporting by respective plug supporting means installed at both sides of the roll into a rolling regi...  
JP63149004
PURPOSE: To expand the possible manufacturing range by piercing a billet by a mannesman piercer and performing plural tube stock drawing for a tube stock by a prescribed outer dia. draft and by changing a drafting direction by use of a c...  
JP63134630
PURPOSE: To manufacture a high quality seamless steel tube at a low cost by heating a martensitic high Cr steel billet under specified conditions, regulating the temp. of the billet to a prescribed piercing temp. and piercing the billet ...  
JP63130207
PURPOSE: To maximize the rolling efficiency and to improve the productivity and service life of a plug by controlling a driving force given to a drive roller shoe of an inclined rolling mill so as to maximize a reaction of a rolling roll...  
JP63115606
PURPOSE: To prevent the generation of the inner part defect of a high alloy steel product and to extend the service life of a plug by filling up a lubricant in a hollow part and piercing after heating the closed hollow billet for Mannesm...  
JP63112009
PURPOSE: To improve the product quality and yield by turnably holding a mandrel roll against a lower platen and making the mandrel roll vertically mountable and demountable against an upper platen. CONSTITUTION: A lower bearing part 21 t...  
JP63112007
PURPOSE: To improve the shape and size accuracy of a rolled stock pipe by forming a roller shoe to a larger diameter from the terminal of the roller shoe where there is no more contact of the rolled stock pipe and plug toward an outlet s...  
JP63112008
PURPOSE: To improve the productivity and to prevent damage to members by forming an open notch into which a king roll is accessible at the upper end of a frame and inserting a rotating shaft into the king roll through the notch. CONSTITU...  
JP63090306
PURPOSE: To stably guide a tube stock being in rolling by installing a disk guide shoe in roughly parallel to the outlet side face angle of a main roll and setting a gap between the disk guide shoe and the main roll to about zero. CONSTI...  
JP63084721
PURPOSE: To detect the displacement of a plug with the revolving movement of a detection bar and to roll the hollow shell having no thickness deviation by inserting one end of the detection bar into the recessed part at the tip of the pl...  
JP63084703
PURPOSE: To prevent the generation of a bend and to produce a steel pipe having excellent quality and shape by supporting a roll housing elastically in such a manner that the position of rolls change according to the peripheral surface s...  
JP63076708
PURPOSE: To increase the efficiency of usability of a tube polishing plug and to improve the economic efficiency fo a reeling stage and the productivity by adjusting an insertion depth of the plug in accordance with a wear condition of t...  
JP63063505
PURPOSE: To reduce the diameter of main rolls and to increase the intersecting angle thereof by supporting the main rolls pivotally on yokes and supporting the main rolls by means of plural divided rolls disposed to back-up roll units. C...  
JP63049308
PURPOSE: To prevent problems of biting and passing-through of a rolled stock to suppress the flaws on a inner surface and to improve the rolling efficiency by measuring the biting time and the passing-through of the rolled stock time to ...  
JP63033106
PURPOSE: To reduce thickness deviation and to improve the inner surface finishing by rolling a hollow tube stock containing a mandrel in the peripheral direction of the tube stock by use of a rolling mill whose roll axis is in the mandre...  
JP63020104
PURPOSE: To attain the smaller diameter and higher crossing angle of cross helical rolls and to compactify a device by cantilvering the rolls on a material outlet side and supporting the rolls on a material inlet side as well by supporti...  
JP63002508
PURPOSE: To restraint vibration of a rolling plug and to reduce wall deviations of a pipe stock by obtaining a reeling part length of the rolling plug rear end by an equation and rolling a pipe by adjusting an outlet side face angle of r...  
JP62282713
PURPOSE: To control the causing of a flaw on an inner surface and to easily perform a piercing roll by piercing rolling a top end part of a columnar metallic material under high friction force, and after the time of completing biting, pi...  
JP62275510
PURPOSE: To automatically command plug changes in piercer mills piercing tube stocks by calculating a plug diameter of a piercer mill by measuring the weight of the tube stock being to be pierced and the outer diameter and length of the ...  
JP62267003
PURPOSE: To improve penetratability and to prevent the generation of inside surface flaws by subjecting a circular cylindrical metallic material having the diameter larger at one end than the other part to piercing from the large- diamet...  
JP62267006
PURPOSE: To permit the adjustment of the angle of inclination of rolls during rolling by rotatably supporting cradles housed therein with the rolling rolls by receiving rollers, clamping the same by means of jacks and cylinders and adjus...  
JP62259602
PURPOSE: To decrease the shearing deformation in a circumferential direction and a wall thickness direction and to prevent the generation of an intra-surface defect by piercing a titled pipe by a pair of rolls which have barrel parts dia...  
JP62230406
PURPOSE: To produce a seamless metallic pipe having a good surface and tough structure by forming a difficult workable metal to a hollow stock by centrifugal casting and hot working the stock to a prescribed size. CONSTITUTION: The comps...  
JP62230419
PURPOSE: To effectively restrain bulging of a tube stock throughout the entire length of the stock using a small capacity driving motor by making a drive roller shoe rotating force in rolling on end parts of the stock larger than that fo...  
JP62227509
PURPOSE: To equalize mechanical properties of products and to improve the production efficiency by inserting the low temp. zone part, containing a mandrel, of the rolling tail end side of a pipe stock into the high temp. heating zone of ...  
JP62220204
PURPOSE: To uniformly penetrate a lubricating agent to guide shoes and to prevent the seizure of the shoes by providing lubricating agent supplying nozzles to the inlet side of the guide shoes and injecting the lubricating agent between ...  
JP62212004
PURPOSE: To prevent the generation of spiral marks and the wear of a plug and to obtain a product having excellent inside surface quality by using a roll having a circular conical shape on one side, the roll inlet side of which is formed...  
JP62207506
PURPOSE: To reduce a roll diameter so that the larger roll crossing angle can be taken by mounting roll bearings to a yoke by trunnion support and sliding shaft parts and yoke on cylindrical faces around the shaft parts of the trunnions....  
JP62199212
PURPOSE: To realize a stable operation by reducing the deflection of a roll by connecting the roll to the driving shaft by a claw clutch by pinching a disher roll between the press piece of a movable roll shaft and the driving shaft. CON...  
JP62148003
PURPOSE: To suppress the temp. increase of guide shoes and the generation of wear and damage by disposing a pair of guide shoes to both sides of a rolling region of rolling rolls which are disposed with inclination and exciting the guide...  
JP62142008
PURPOSE: To obtain a roll for an elongator which excels in all of wear resistance, surface roughening resistance and strength by adding V to a spherical graphite steel to improve the strength and wear resistance thereof and spheroidizing...  
JP62127107
PURPOSE: To prevent the wear, damage, etc., of a guide shoe by moving the guide shoe in the progressing direction of a rolling stock and by returning it to the original position from the moving end at the rolling completion time while un...  
JP62124003
PURPOSE: To improve mechanical efficiency and to permit easy carrying in and out of a material by disposing one of the driving systems for rolling rolls of a crossing type cross helical rolling mill on the inlet side of a pass line and d...  
JP62107807
PURPOSE: To change rolls at optional cross angle by mainly constructing a means for supporting a connecting part with a cross assembly of a means for moving the supporting point of a carrier of a spindle and of a means for stretching and...  
JP62104607
PURPOSE: To execute smoothly rolling by supporting stably a blank pipe which is being rolled by a drive roller shoe, by also drawing the blank pipe from one rolling roller to the other rolling roller by a tangential force of the drive ro...  
JP62104611
PURPOSE: To control an extrusion of a blank pipe, and to roll smoothly a rolling blank pipe having a high quality by detecting a drive roller shoe reaction force, and bringing a shoe to a driving control so that a ratio made by a tangent...  
JP62097709
PURPOSE: To easily determine adequate and correct rolling conditions by selecting the equation of the conditions for preventing the generation of a defective bite and tail clogging as well as the equation of the conditions for preventing...  
JP62093011
PURPOSE: To manufacture the seamless circular pipe of excellent quality without causing the inner face angular expansion of hexagonal shape by arranging the drawing roll which is composed of three pieces to be used for the finishing draw...  
JP62081205
PURPOSE: To adjust a cross angle and a tilting angle of upper and lower rolls to an optimum value and to prevent deformation and/or fissures of a pipe end by detecting a position of the pipe end using a couple of stock detectors, detecti...  
JP62077102
PURPOSE: To make a device smaller in size and simpler by providing a container having an inside bore, disposing a roll casing into the container and rotationally driving at least either of the container and roll casing. CONSTITUTION: The...  
JP62034609
PURPOSE: To suppress the wear of guide shoes and to prevent the formation of flaws on the surface of a pipe stock for a seamless steel pipe to be formed by supplying a liquid lubricating agent to the specific part between a round billet ...  
JP62024805
PURPOSE: To prevent the increase of electric power for driving rolling rolls during piercing of the rear end of a round billet by heating the rolling rear end of the round billet and piercing the same in the stage of piercing the round b...  

Matches 851 - 900 out of 1,202