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Matches 701 - 750 out of 1,579

Document 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...  
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 ...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
JPH0745056B2  
JPH0745048B2  
JPH0741292B2  
JPH0741291B2  
JPH0718410Y2  
JPH0718408Y2  
JPH0718404Y2  
JPH0718405Y2  
JPH0718403Y2  
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...  
JPH0734927B2  
JPH0734960B2  
JPH0734959B2  
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...  
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...  
JPH0729126B2  
JPH0729129B2  
JPH0729127B2  
JPH0729131B2  
JPH0729128B2  
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 ...  
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...  
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 ...  
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...  
JPH0712482B2  
JPH0712481B2  
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 ...  
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...  
JPH0710401B2  
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...  
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...  
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...  
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...  
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 ...  
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 ...  
JPH072257B2  
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...  
JPH06104243B2  

Matches 701 - 750 out of 1,579