Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 851 - 900 out of 2,145

Document Document Title
JPH07164023A
PURPOSE: To attain a forming condition free from the generation of a roll mark by finding the generation limit line of the roll mark according to the ovalities of three roll stands, and limiting the ovalities of two roll stands and a dra...  
JPH07164020A
PURPOSE: To manufacture a seamless steel pipe by preventing the generation of a flaw on the inner surface of the pipe when piercing and rolling a cast billet cast continuously, using as a billet, and when piercing and rolling a cast bill...  
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...  
JPH07164021A
PURPOSE: To improve a peeling limit, and to reduce the generation factor of a guide shoe mark by that the projection of a piercing shell between a main roll and a guide shoe, becomes less. CONSTITUTION: When piercing a seamless steel pip...  
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  
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  
JPH07124612A
PURPOSE: To provide a piercing method of a seamless metallic tube which can carry out piercing of a high tube expanding ratio stably without generating troubles such as choking, outside flaws of a tube, poor engagement and so forth. CONS...  
JPH0741292B2  
JPH0741291B2  
JPH07116709A
PURPOSE: To prevent seizure and to eliminate plunging flaws or the like by rolling a material to be rolled while supplying lubricant which adds solid lubricant into swollen mica base aq. solution between rolling rolls, guide shoes and th...  
JPH0718410Y2  
JPH0718408Y2  
JPH0718404Y2  
JPH0718405Y2  
JPH0718403Y2  
JPH0739016B2  
JPH0734927B2  
JPH0734960B2  
JPH0734959B2  
JPH07100560A
PURPOSE: To provide a manufacturing method for a zirconium alloy seamless pressure pipe by which the aggregate structure thereof is changed so as to improve safety during the operation of a nuclear reactor, thereby improving the reactor ...  
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  
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  
JPH0715108U
[Objects of the Invention] The adhesion thing stuffed into the element tube peripheral face immediately after is removed as a roll turner, and it repairs the crack of an element tube peripheral face. [Elements of the Invention] It is a d...  
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...  
JPH079501U
[Objects of the Invention] Various kinds of regulating functions are given to Thijs Cros * ル for ピアサ *. [Elements of the Invention] A tip of ロ * ル driving shaft 3 of Thijs Cros * ル 2 is joined to slide チョック 4, and ...  
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  
JPH0726323A
PURPOSE: To produce a seamless steel tube excellent in SSC resistance by specifying chemical components and also limiting hot rolling conditions and cooling conditions, respectively. CONSTITUTION: A steel having specific chemical compone...  
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...  

Matches 851 - 900 out of 2,145