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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 ...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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 ...
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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...
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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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JP62016809 |
PURPOSE: To improve the quality and the yield by controlling a rolling condition of a sizing machine based on the pipe outside diameter at the same position in the axial length direction, before and after straightening a metallic pipe, a...
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JP62006706 |
PURPOSE: To exert tensile stress to a rolling material and to control the bulging in the direction perpendicular to the axis thereof by exerting spiral movement and tensile force to a chuck part for chucking the front end of the rolling ...
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JP61293602 |
PURPOSE: To increase the number of pipes to be rolled by a guide shoe tool for rolling by partly decreasing the thickness in the sliding part of the guide shoe tool and oscillating said part thereby decreasing the friction of the sliding...
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JP61253102 |
PURPOSE: To improve the accuracy of a diametral size by setting the length in the reeling part of each cone type roll of a cross helical rolling mill by a mathematical expression thereby executing rolling while bringing each part of the ...
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JP61245906 |
PURPOSE: To improve the quality of a seamless steel pipe by setting small the inclination angle of cross helical rolls in the stage of rolling at the prescribed time at the top and bottom of a material to be rolled thereby improving roll...
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JP61209706 |
PURPOSE: To improve the quality of a product and the durability of a shoe by slantly arranging a drive roll shoe at a fixed advancing angle and controlling its rotational speed synchronously with that of a stock to be rolled. CONSTITUTIO...
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JP61209707 |
PURPOSE: To improve the productivity of a titled mill by controlling operation by increasing a piercing speed through the increase of the work of a drive roll shoe when the actual piercing speed of a stock to be rolled remains less than ...
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JP61202706 |
PURPOSE: To exchange rapidly and easily roll shoes and to stabilize the supporting state of the roll shoe by connecting a shoe base, used for rotatably supporting the roll shoe, to a slide block capably of engaging and disengaging them w...
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JP61202721 |
PURPOSE: To manufacture a clad pipe having a well adhered mating surface of inner and outer pipes by extracting air in the clearance between inner and outer piper stocks through a groove formed in the peripheral direction between both pi...
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JP61202720 |
PURPOSE: To secure sealing ability in hot working, by shrinkage fitting together outer and inner pipe stocks, having different linear thermal coefficients of expansion respectively, to seal their top parts by welding, and projecting the ...
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JP61199504 |
PURPOSE: To prevent an invasion of air to a fitting part by a simple technique and to improve the productivity of the titled pipe, by providing a glass material to a groove formed at the lapping part of both ends of inner and outer pipe-...
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JP61182810 |
PURPOSE: To improve the quality of products and to stabilize its manufacture by arranging rolling rolls slantly with respect to a pass line and providing a speed difference between the rotational speeds of respective rolls. CONSTITUTION:...
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JP61180603 |
PURPOSE: To obtain a pipe stock, thick-walled and excellent in inner-surface properties, by limiting the amount of roll opening and piercing a billet by a Mannesmann piercer, in piercing stage. CONSTITUTION: The effect of roll forging is...
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JP61176414 |
PURPOSE: To decrease the deviation amount of a rolling plug from a mill center and its speed ratio to a rolling roll, by controlling the rotational speed of plug so as to relate it specifically to that of a rolling roll during the rollin...
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JP61169103 |
PURPOSE: To obtain a seamless steel pipe excellent in surface properties by manufacturing the pipe under the optimum conditions by using the relations between the previously obtained reeler rolling conditions and the dimensions and surfa...
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JP61162217 |
PURPOSE: To enable the rolling of a larger sized material and high alloy material with increasing the rolling capacity by eliminating the peak electric power to generate at the piercing completing time of a squeeze rolling by subjecting ...
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JP61144218 |
PURPOSE: To manufacture easily and inexpensively an intermediate corrosion- resistant and triple-ply clad steel pipe, by wrapping a stainless steel of specific components or a nickel-base alloy around a easy-to-work carbon steel by casti...
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JP61144207 |
PURPOSE: To roll smoothly a pipe stock while preventing its squeezing-out phenomenon by setting the starting position of the thickness-reduction of pipe stock, performed by rolling rolls and a plug, from the gorge part of rolling roll to...
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JP61144206 |
PURPOSE: To support a pipe stock stably, and to roll it smoothly into an excellent shape, by setting the taper angles at the inlet and outlet sides of a roll shoe, the lengths of the inlet and outlet sides of roll shoe and the distance b...
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JP61144204 |
PURPOSE: To restrain the bulging of a stock by providing a forward tension thereto, by providing a roll parts to a rolling roll from its inlet side to outlet side and making the maximum diam. of the 3rd roll-part larger than the roll dia...
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JP61144205 |
PURPOSE: To promote the elongation of a pipe stock by restraining the increase of its expanding rate, and to improve the operability of rolling and the quality of product, by using the small-diam. front end of a plug as a guiding part ha...
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