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Patent Searching and Data


Matches 901 - 950 out of 1,579

Document 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...  
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 ...  
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...  
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...  
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...  
JPH0429444B2  
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...  
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 ...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
JPH0443403U  
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 ...  
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...  
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...  
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...  
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...  
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...  
JPH042321B2  
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...  
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...  
JPH04725B2  
JPH04723B2  
JPH0357281Y2  
JPH0357282Y2  
JPH03126201U  
JPH0378162B2  
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...  
JPH0378163B2  
JPH0378165B2  
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...  
JPH0377004B2  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  

Matches 901 - 950 out of 1,579