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Document Title |
JPH03165903A |
PURPOSE: To manufacture a tubing with the wall thickness and outside diameter of high accuracy in high yield by accelerating controlling the moving speed of mandrel bar in the rolling direction when the rear end part of tubing is rolled....
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JPH0346204B2 |
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JPH0346205B2 |
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JPH0368902U |
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JPH03155401A |
PURPOSE: To shorten the length of a flare generated at the rear end part of a tube material and to improve the yield by adjusting the opening of rolling rolls so that the reduction of thickness of the rear end part of the tube material i...
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JPH03151103A |
PURPOSE: To prevent a large crack and a small rash flaw from generation by heating and piercing a billet of deeplex stainless steel material at a specified temperature. CONSTITUTION: The relation between the heating temperature of duplex...
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JPH03151104A |
PURPOSE: To improve the productivity and to reduce the product cost without making a defect such as a crack on a product tube by determining a proper range of a quantity of state regarding the rolled state of a metallic tube and changing...
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JPH0342123B2 |
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JPH0328961Y2 |
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JPH0340642B2 |
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JPH0340644B2 |
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JPH0340643B2 |
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JPH03142010A |
PURPOSE: To agree a predicted value with a target value though a varying factor of rolling time is generated by predicting a rolling work done when a tube stock has been rolled and controlling a target electric power of rolling so that a...
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JPH0327682Y2 |
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JPH0338001B2 |
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JPH03128106A |
PURPOSE: To obtain a good internal face quality by deciding the moving speed of a mandrel bar and the initial position of the rolling start time under the conditions of reaching the start point of a roll bite part simultaneously with the...
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JPH03124305A |
PURPOSE: To improve the life of a plug and the steel pipe quality by fitting a common steel made protection cap to the tip of a plug for piercing in case of manufacturing a seamless steel pipe with its piercing for an alloy steel. CONSTI...
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JPH0333407B2 |
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JPH0333406B2 |
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JPH03110007A |
PURPOSE: To facilitate a recombination and an adjustment work with the structure being simple, by abutting to the internal face tapered part of the friction ring whose inner diameter becomes larger toward the inlet side and driving a rol...
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JPH03100139A |
PURPOSE: To prevent the generation of cracks in the metallic tube caused by the difference in thermal expansion, in a one-end sealed metallic tube in which one end part is made of a tube the other end part is sealed, by integrally formin...
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JPH03100096A |
PURPOSE: To obtain the title lubricant which can make a mixing operation simple and safe, facilitate sticking at ordinary temperature, shorten the drying time, and improve both the adhesiveness at ordinary temperature and the stability w...
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JPH0399708A |
PURPOSE: To manufacture a high alloy steel seamless steel pipe of high quality by cooling the shell internal face by a cooling water during the piercing of a shell and controlling the temp. of the shell inner and outer faces at the temp....
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JPH0342302U |
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JPH0386304A |
PURPOSE: To obtain a material center rest feeding device which keeps a material on the center axis of a rotation working device by holding freely rotatably plural rings with containing the center axis of the rotation working device insid...
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JPH0325241B2 |
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JPH0377708A |
PURPOSE: To properly hold a roll gripping force by executing a knurling so as to make the roll surface in the depth shown by an expression while under the size changing of a rolled stock in the state of roll being assembled to a housing....
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JPH0324284B2 |
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JPH0366403A |
PURPOSE: To prevent the abrupt stress variation of a pipe rolling part and to improve the dimensional accuracy and quality by gradually increasing a tensile force to a specific value, gradually increasing the tensile speed of a pipe to t...
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JPH0366401A |
PURPOSE: To prevent the temperature lowering of a heating material and to work the material repeatedly, by arranging in series in order the heating device of the material, a cylindrical heat insulation guide device, working device repeat...
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JPH0320283B2 |
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JPH0320284B2 |
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JPH0318526B2 |
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JPH039841Y2 |
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JPH0342103A |
PURPOSE: To prevent excessive rolling reduction of a tube as an objective to be rolled by controlling a crossed axes angle so that ratio of a repulsive force of roll on the inlet side of reeler rolls to a repulsive force of roll on the o...
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JPH0312962B2 |
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JPH0327805A |
PURPOSE: To allow an immediate constant-diameter rolling without subjecting a stock to a reduction drawing after piercing by setting the max. roll diameter in the outside diameter reduction part of the rolling rolls of a piercer larger t...
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JPH033522B2 |
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JPH034303U |
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JPH038506A |
PURPOSE: To improve bite and also to enable the high work efficiency of the control of rolling by reeler rolls by performing reeling by making the inclined angle of reeler rolls smaller when a tube is bitten and making the above inclined...
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JPH0262081B2 |
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JPH0254165B2 |
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JPH0254164B2 |
A method of reducing the thickness of the wall of a tube wherein in the zone of the reduction of the wall thickness, on the internal surface of the tube the plug of a mandrel exerts a pressure causing an increase of the inner diameter, a...
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JPH0254167B2 |
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JPH0254166B2 |
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JPH0253133B2 |
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JPH02251305A |
PURPOSE: To reduce the shoe reaction of a roller shoe and to improve its quality and yield by equipping linear grooves nearly in parallel and at an equal interval to the advancing direction of rolling of a material to be rolled and on th...
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JPH0242003B2 |
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JPH02224808A |
PURPOSE: To prevent the seizure of disk roll-shaped guide shoes and a rolled stock and to effectively prevent the slip between both as well by executing the supply of a seizure preventive agent while specifically maintaining the surface ...
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JPH0238281B2 |
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