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Document Title |
JPH07185610A |
PURPOSE: To reform an existing mandrel mill line at low cost and to produce product pipes of larger outside diameters by composing rolling equipment for seamless pipes of a Mannesmann inclined piercer, a mandrel mill, a incline type expa...
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JPH07171606A |
PURPOSE: To evade the defective biting, defective running-out of a material to be rolled and the breakage of a hollow by flaring, to increase the degree of freedom in rolling setting and to enable highly expanding/rolling a tube without ...
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JPH07164022A |
PURPOSE: To prevent an increase in a gap caused by the deformation and the shifting of a disk roll during rolling. CONSTITUTION: Disk rolls 2U and 2D are arranged opposite to each other in the vertical direction on both sides of a pass c...
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JPH07155806A |
PURPOSE: To prevent generation of the torsion in a material to be rolled and additive shearing strain in a section even at the time of rolling high-alloy steel such as stainless steel and to prevent generation of failure of biting, defec...
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JPH07155805A |
PURPOSE: To apply a lubricant without being affected by ejector effect caused by jetting high pressure water by mounting a lubricant jetting nozzle provided with guide nozzles which are isolated from a high pressure water jetting nozzle ...
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JPH07155808A |
PURPOSE: To prevent generation of torsion in a material to be rolled and additive shearing strain in a section even at the time of rolling high alloy steel such as stainless steel and to prevent generation of failure of biting, defective...
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JPH07155807A |
PURPOSE: To prevent the generation of failure of biting, to increase the degree of freedom in the setting of rolling and to improve yield and productivity in piercing. CONSTITUTION: In a skew rolling method of a seamless tube, face angle...
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JPH07148507A |
PURPOSE: To improve the service life of a plug to be used in the piercing process when the seamless alloy steel tube is manufactured, and to improve the basic unit of the tool, the productivity and the quality of the inner surface. CONST...
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JPH07505092A |
A tube making mill setup includes an induction heater for a billet, with means to transfer the heated billet directly to a piercing machine. The piercing machine includes main driving and gripping rolls on skewed axes and which drive the...
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JPH07136703A |
PURPOSE: To reduce the generation of a flaw generated on an inner surface in the process of seamless rolling, to improve a quality, to improve a yield, and to enable to reduce the need of a flaw repair. CONSTITUTION: This method is a rol...
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JPH07136702A |
PURPOSE: To suppress the occurrence of a defect generated on the inner surface of a tube by setting the absolute value of a strain defined by a specific formula within a specific range at the time of piercing a round billet by inclined r...
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JPH07132313A |
PURPOSE: To efficiently perform descaling and coating of a lubricant on the inside surface of a tube immediately before an elongating process or reeling process for manufacturing a stainless tube. CONSTITUTION: The inside surface of a tu...
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JPH0745056B2 |
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JPH0745048B2 |
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JPH0741292B2 |
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JPH0741291B2 |
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JPH0718410Y2 |
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JPH0718408Y2 |
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JPH0718404Y2 |
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JPH0718405Y2 |
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JPH0718403Y2 |
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JPH0739016B2 |
A method for the automatic control of the setting of spinning rolls in relation to a cylindrical, tubular workpiece in an opposed roll spinning lathe with four pairs of rolls. Each of the four pairs of rolls consists of one inner roll an...
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JPH0734927B2 |
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JPH0734960B2 |
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JPH0734959B2 |
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JPH07100509A |
PURPOSE: To uniformize rolling distribution and to decrease ununiform thickness by piercing and rolling a seamless steel tube with piercing rolls where the majority of the roll is parallel with a pass center when a seamless steel tube is...
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JPH0732921B2 |
The mill includes a mill housing having a base, an open top and an open interior defined by vertically extending mill posts and interconnecting side portions. A cylindrically shaped bottom cradle supports a rotatable bottom roll and is f...
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JPH0729126B2 |
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JPH0729129B2 |
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JPH0729127B2 |
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JPH0729131B2 |
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JPH0729128B2 |
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JPH0775806A |
PURPOSE: To provide a method for rolling a seamless steel tube under graphite lubrication by which surface roughening is extremely reduced by uniformly feeding the specified amount of graphite in the length direction in the hollow shell ...
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JPH0722765B2 |
PCT No. PCT/DE87/00606 Sec. 371 Date Jun. 23, 1989 Sec. 102(e) Date Jun. 23, 1989 PCT Filed Dec. 21, 1987 PCT Pub. No. WO88/04583 PCT Pub. Date Jun. 30, 1988.A two-high inclined-roll mill for the piercing and stretching of a solid and ho...
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JPH0715108U |
[Purpose] Immediately after the rolling process, the deposits pushed into the outer peripheral surface of the raw pipe are removed, and the flaws on the outer peripheral surface of the raw pipe are repaired. [Constitution] A device that ...
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JPH0747409A |
PURPOSE: To roll a seamless steel tube in which an uneven metal scarcely exists in the peripheral direction with mandrel bars of the number being as small as possible by executing the rolling by inclining and arranging roll shafts of a p...
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JPH0712482B2 |
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JPH0712481B2 |
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JPH0739909A |
PURPOSE: To manufacture a seamless steel tube wherein seizure is prevented and the quality of the outer surface of a product has been improved. CONSTITUTION: The seizure of a stock 1 to be rolled to the surface of a guide shoe is caused ...
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JPH0739908A |
PURPOSE: To reduce the surface scratches of a product and stably manufacture a seamless steel tube excellent in surface quality by rolling a rolled stock continuously as it is supplied to the following stage after the outer surface of th...
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JPH0710401B2 |
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JPH0732013A |
PURPOSE: To effectively operate roll rearrangement and to reduce the entire height of a piercing mill. CONSTITUTION: The device has upper and lower rolls 2, 3 freely ascending and descending by upper and lower rolling-down devices 6, 7 b...
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JPH078365B2 |
A seamless tube mill comprises two disk rolls mounted to be driven in rotation on substantially parallel axes which axes are perpendicular to guide the workpiece along the pass line which rolls may be rotated away from the pass line to e...
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JPH0724508A |
PURPOSE: To minimize a gap between a guide disk and a conical roll, to prevent exterior flaw of a material and to improve the accuracy of external size by making a disk shaft case swingable in the pass-line direction, moving the case and...
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JPH0716617A |
PURPOSE: To make a roll rearrangement work efficient and to miniaturize a stand. CONSTITUTION: In the stand 1 provided with front and rear housings 1A, 1B, upper and lower rolls 2, 3 which are lifted and lowered with upper and lower scre...
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JPH0718328A |
PURPOSE: To provide a manufacturing method of a seamless steel tube having grain fining organization. CONSTITUTION: After a square steel billet is heated to a high temperature of 900 to 1050°C, the billet is rolled with a press rolling ...
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JPH0716618A |
PURPOSE: To make a roll rearrangement work efficient and to lower the overall height of a mill. CONSTITUTION: Upper and lower rolls 2, 3 wich are lifted and lowered with upper and lower screw down devices 6, 7 and right and left disks 8 ...
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JPH072257B2 |
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JPH079013A |
PURPOSE: To bore billets having different kinds of major diameters without injuring the outer surfaces by providing at least a pair of guide rolls having a concaved surface each which can adjust interval, crossing angle and revolving spe...
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JPH06104243B2 |
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