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Document Title |
JPH04157006A |
PURPOSE: To reduce thickness deviation by affixing a strain gage on the inside surface of the bar cap of a mandrel bar, receiving electric signals in accordance with the strain from the strain gage on a radio and diagnosing inconsistency...
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JPH04157005A |
PURPOSE: To reduce defective products by measuring the amplitude of vibration of a shell on the outlet side of an elongator with the measuring sensor of a single axis CCD camera, sending these signals to a means for judging amplitude of ...
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JPH04147705A |
PURPOSE: To produce the corrosion resistant metallic pipe which allows the remaining of uniform residual stresses and the reproduction thereof by fitting roller supporting metals which support elongating rollers freely movably forward an...
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JPH04147708A |
PURPOSE: To improve the dimensional accuracy of a steel pipe by attaining the target rolling torque meeting the rolling speed of a reeling mill in order to attain the coincidence of a thickness rolling reduction and a target thickness ro...
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JPH04147704A |
PURPOSE: To prevent the generation of inside surface flaws by specifying the relations among the heating temp. of a blank material, the upper and lower limits thereof, the straining rate of piercing, the sulfur concn. of the blank materi...
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JPH0429444B2 |
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JPH04143012A |
PURPOSE: To prevent the generation of uneven wall thickness due to the inclined roll on the drilling process by storing the inclining deviated speed wave shape caused by the universal joint and controlling the rotation speed of the drivi...
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JPH04143005A |
PURPOSE: To improve the unit requirement of fuel by specifying a heating temp. and gorge in the manufacture of seamless tube with a Mannesmman type skew rolling mill. CONSTITUTION: In the manufacture of seamless tube with the Mannesmann ...
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JPH04143004A |
PURPOSE: To prevent rear end contraction by retreating a plug at the point of time of rolling the predetermined part on the rear end side in the rolling direction of a base stock in the skew rolling of seamless tube. CONSTITUTION: At the...
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JPH04138808A |
PURPOSE: To prevent the generation of the surface flaw of tube due to grain boundary oxidation when heating a billet by preheating the billet on the preceding stage of heating the billet and making the billet into a tube and applying ant...
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JPH04138806A |
PURPOSE: To prevent selective oxidation when heating a billet and in its turn to prevent the generation of the pressed flaw of oxidized scale on the surface of tube by rolling the billet as it is without repairing when the number of surf...
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JPH04138807A |
PURPOSE: To prevent the generation of the pressed flaw of ceramic oxidized scale on the surface of tube and to reduce the repair rate of the surface of tube of the final product by heating a billet after ceramic antioxidants are applied ...
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JPH04135005A |
PURPOSE: To roll a tube without generating excess shearing strain in a shell by inclining the roll axis of a conical roll of a two roll type skew rolling mill at a prescribed angle to the pass center, crossing and approximately fixing th...
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JPH04135002A |
PURPOSE: To completely pierce without causing end clogging and defective piercing by piercing while pushing the rear end of base stock again with a pusher just before the end of piercing. CONSTITUTION: Just before the end of piercing, th...
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JPH04135004A |
PURPOSE: To prevent flaw on the inside and outside faces, angularity and end clogging and to execute high-accuracy rolling by confining the wall thickness/outside diameter ratio of tube stock and the shapes of inclined rolls and plug and...
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JPH04135003A |
PURPOSE: To freely set a tube length and to execute high-efficiency and high-quality rolling by specifying the diameter reduction rate of tube when rolling and the shapes of an inclined roll, guide member for bar for tube, plug, etc. CON...
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JPH04135001A |
PURPOSE: To manufacture a base stock for high alloy seamless steel tube with high yield by specifying the cross section of the base stock and its rolling quantity when a round billet for seamless steel tube is manufactured from a cast bl...
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JPH04127902A |
PURPOSE: To improve quality, yield, productivity, safety in the manufacture of a thin-wall small diameter tube of silver alloy by adopting stages of hot piercing rolling, hot diameter reducing rolling and cold working from a billet. CONS...
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JPH04111906A |
PURPOSE: To produce the high-Ni alloy seamless pipe having the good outside surface quantity of the pipe without generating rolling flaws by using a round billet or square bloom of the high-Ni alloy formed with an aluminum film on the su...
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JPH0443403U |
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JPH04105705A |
PURPOSE: To prevent seizure, surface flaw of a tube stock and to prevent a roll from wear and the life from lowering by removing the flow of cooling water with a dewatering plate provided on the inlet side of a rolled stock of a caliber ...
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JPH0484610A |
PURPOSE: To obtain a thin steel tube of high out-of-roundness without correcting means by keeping that posture to a required temp. after rolling by arranging an elliptic caliber which is elliptic in the vertical direction in at least the...
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JPH0471709A |
PURPOSE: To prevent the generation of end clogging without the lowering of efficiency and generation of inside flaw by providing a hole of a specified condition on the side of rear end of a material to be rolled which is fed to a Mannesm...
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JPH0471710A |
PURPOSE: To squeeze shrinkage-cavity-like vacancy which is generated on inside surface of solidified layer and to press stick solidified metal without making boundary by pouring molten metal into the metal frame for centrifugal casting a...
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JPH0466207A |
PURPOSE: To prevent degradation and variance of the inner skin by keeping the velocity ratio of mandrel bar in a specified velocity ratio by an equation at the time of skew/elongating rolling using a mandrel bar. CONSTITUTION: A tube sto...
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JPH0452011A |
PURPOSE: To surely remove scale by injecting a fluid on the inner peripheral surface of a pipe stock which is reduced on the inlet side of a skew rolling roll while a plug is inserted into the pipe stock, the above-mentioned fluid is inj...
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JPH042321B2 |
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JPH0413401A |
PURPOSE: To drastically improve the nose bend of the tip of a seamless tube by inserting a mandrel into the inner part to perform sizing in passing a sizer, in the sizing executed after passing a reeler in the manufacture of the seamless...
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JPH0413402A |
PURPOSE: To drastically improve the nose bend at the tip of a seamless tube by opening the roll gap more largely than a set value in advance when the tip of a tube stock passes and closing the roll gap down to the set value for sizing di...
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JPH04725B2 |
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JPH04723B2 |
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JPH0357281Y2 |
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JPH0357282Y2 |
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JPH03126201U |
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JPH0378162B2 |
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JPH0378164B2 |
The invention relates to a process for controlling a rolling mill having oblique rolls which is used for rolling metal rods or tubes, and to the rolling mill for carrying out the process. The rolling mill according to the invention compr...
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JPH0378163B2 |
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JPH0378165B2 |
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JPH03281026A |
PURPOSE: To temporarily retain the position of a main roll and to surely reduce the thickness deviation of a work by advancing the main roll from a waiting position at a fast feed speed, reducing a feed speed in sequence as far as the si...
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JPH0377004B2 |
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JPH0377005B2 |
The invention relates to the production of thin-walled seamless pipes from solid billets wherein, a billet is heated (1); pierced (2); longitudinally roughed (3,24); expanded (4); sized (5); and cooled (6). The longitudinal roughing devi...
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JPH03234306A |
PURPOSE: To eliminate the limitation of length in tube manufacturing by holding a plug in a tubing due to the balance of the rolling load of inclined roll and the coefficient of friction between the tubing and the plug in the cross helic...
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JPH03211261A |
PURPOSE: To obtain a tube excellent in both strength and ductility only by annealing treatment, at the time of manufacturing a tube by an inclined rolling method, immediately after the end of hot rolling, rapidly cooling the rolled stock...
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JPH03204106A |
PURPOSE: To improve the durability of plug by providing the covering layer of a specified composition on the surface of plug for manufacturing hot seamless tube and further forming an iron oxide layer with a specified thickness on that s...
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JPH03198902A |
PURPOSE: To obtain a thin small diameter tube without squarishness, wrinkly flaws on the inner surface of tube and flaws on the outer surface of tube by forming elongating rolling under specific conditions using a plug with a rolling par...
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JPH0337770Y2 |
An apparatus for working a surface of a metal pipe is provided. The apparatus comprises a drawing unit for drawing a metal pipe to reduce a diameter thereof, and a working assembly for working the diameter-reduced metal pipe to form an i...
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JPH03169410A |
PURPOSE: To roll a fine seamless steel tube without flaw on the inner surface by measuring piercing efficiency under rolling and knurling roll surfaces so as to make that measured value not less than a preliminarily determined value. CON...
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JPH03169445A |
PURPOSE: To mass-produce a titanium ring for electrodeposition drum having good surface characteristic and high circularity under good workability by executing specific ring rolling to reduction ratio and outer diameter expanding velocit...
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JPH03169413A |
PURPOSE: To improve the productivity by knurling the surface roughness of a roll in a specified range during rolling a seamless steel tube by a skew rolling mill. CONSTITUTION: When the seamless steel tube is pierced or rolled by the ske...
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JPH03169411A |
PURPOSE: To prevent seizure by providing nozzles with which lubricant is jetted toward rotary disks on the outside part of cannon with which a billet is introduced to a piercing roll in the piercing device of the manufacturing line for s...
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