| Document |
Document Title |
|
JP04182010 |
PURPOSE: To prevent the inside surface of tube from generating oxidized scale by applying liquid glass lubricant on the inside surface of the tube of compound material before heating in the manufacture of a clad steel tube by skew rollin...
|
|
JP04182008 |
PURPOSE: To prevent the generation of the interior defect of tube by specifying piercing rolling conditions at the time of manufacturing a seamless tube. CONSTITUTION: At the time of manufacturing the seamless tube, when a billet (base s...
|
|
JP04178204 |
PURPOSE: To remove the carburized part due to the plug mill rolling while making the total cost minimum by specifying the thickness reducing amount of the plug mill and the rolling temperature of one pass time, and rolling by controlling...
|
|
JP04172112 |
PURPOSE: To prevent the generation f shoe mark due to the seizure of the guide shoe almost completely by rolling after coating the outer circumferential surface of the round steel bar or the tube stock of the high temperature state with ...
|
|
JP04167905 |
PURPOSE: To prevent the development of peeling caused to development of miss roll by arranging a fixed guide at between each disk roll and cross helical roll and bringing the fixed guide into sliding contact with outer peripheral face of...
|
|
JP04158908 |
PURPOSE: To obtain a seamless steel tube of duplex stainless steel excellent in the outside surface quality of tube without rolling flaw that is harmful to productivity and cost by rolling by Mannesmann process for making tube using a ro...
|
|
JP04157005 |
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 ...
|
|
JP04157006 |
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...
|
|
JP04147705 |
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...
|
|
JP04147706 |
PURPOSE: To improve the life of a plug for piercing by specifying the relation between the diameter and effective length of the plug. CONSTITUTION: The diameter of the plug for producing a seamless steel pipe, designated as Dp and the ef...
|
|
JP04147708 |
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...
|
|
JP04147704 |
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...
|
|
JP04143219 |
PURPOSE: To form a uniform and superfine austenite structure and to produce a hot rolled bar steel excellent in strength, toughness, and corrosion resistance by inversely transforming ferrite phase into austenite phase while applying pla...
|
|
JP04143006 |
PURPOSE: To prolong the life of a mechanism for removing secondary scale by making a cooling bar which is provided in the tip part of a mandrel bar of elongator for manufacturing seamless tube and which is communicated with a path for co...
|
|
JP04143004 |
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...
|
|
JP04143012 |
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...
|
|
JP04143005 |
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 ...
|
|
JP04138807 |
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 ...
|
|
JP04138808 |
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...
|
|
JP04138806 |
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...
|
|
JP04135004 |
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...
|
|
JP04135001 |
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...
|
|
JP04135002 |
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...
|
|
JP04135005 |
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...
|
|
JP04135003 |
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...
|
|
JP04127902 |
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...
|
|
JP04111906 |
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...
|
|
JP04105705 |
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 ...
|
|
JP04084610 |
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...
|
|
JP04081209 |
PURPOSE: To enable piercing and elongation continuously, at a large quantity and with poor surface flaws by using an inclined roll mill, spraying cooling water to the rolls from a mist nozzle, and/or removing excessive cooling water on t...
|
|
JP04071710 |
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...
|
|
JP04071709 |
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...
|
|
JP04066207 |
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...
|
|
JP04055005 |
PURPOSE: To satisfactorily suppress a fact that peeling is generated between a base metal pipe and a cladding pipe which are clod against each other, and also, to suppress the crack by forming successively a large diameter part in which ...
|
|
JP04052011 |
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...
|
|
JP04013401 |
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...
|
|
JP04013402 |
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...
|
|
JP03297505 |
PURPOSE: To roll the pipe with a good surface quality and without cracking by specifying the temp. condition before drawing and strain condition in drawing to a pipe stock after piercing when manufacturing the seamless steel pipe of a hi...
|
|
JP03294003 |
PURPOSE: To obtain a steel tube having a good surface quality by setting temperatures of the inner and outer surfaces of a tube stock at a specified temperature in rolling a steel tube where specified values of C, Si, Mn, Cr, Ni, Mo, A, ...
|
|
JP03281005 |
PURPOSE: To fix the inserting width of pipe and to prevent error when assembling by forming the tips of round pipes into a shape along the inner peripheral surface of socket, forming a build-up part on the outer surface of round pipes an...
|
|
JP03281004 |
PURPOSE: To prevent the stripping and falling-off lubricant in accordance with heating for rolling by removing a mill scale on the surface of a material to be rolled before the lubricant for hot rolling tube is applied on the surface of ...
|
|
JP03281026 |
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...
|
|
JP03258406 |
PURPOSE: To manufacture a seamless tube of two-phase stainless steel excellent in the quality of the outer surface of tube by using a round billet of stainless steel on which an aluminum film with a specified thickness is formed and manu...
|
|
JP03248714 |
PURPOSE: To obtain the clad pipe without stripping or other joining defects by executing diffusion joining after fitting the hollow billet, and then, skew rolling. CONSTITUTION: On the case of the diffusion joining to be executed after i...
|
|
JP03243212 |
PURPOSE: To provide the products without the structural defect and to enlarge the range of possibility of manufacture by fitting the high alloy hollow billet in the hollow billet of carbon steel, etc., and then, seal-welding the boundary...
|
|
JP03240921 |
PURPOSE: To produce a seamless steel tube having superfine structure by applying piercing rolling to a solid round billet at specific piercing ratio while elevating the temp. of this round billet to a temp. in a specific region and tempo...
|
|
JP03234306 |
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...
|
|
JP03226303 |
PURPOSE: To improve productive efficiency by rolling by preventing bulge with guide shoes which are provided among each roll when the metallic tubing with a large outside diameter into which a mandrel is inserted and which the ratio of t...
|
|
JP03216203 |
PURPOSE: To manufacture the above clad steel tube without generating peeling and crack by giving a negative convergence angle to each roll of a three roll elongator and providing guide shoes freely movably forwards and backwards between ...
|
|
JP03216205 |
PURPOSE: To ensure the stable workability of scraping and cleaning by scraping the edges only of disk guide shoes on the inlet side of rolling. CONSTITUTION: The disk guide shoes 3, 4 of a rolling mill with inclined roll are scraped and ...
|
