Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 1,401 - 1,450 out of 2,201

Document Document Title
JPS6466007A
PURPOSE: To prevent the generation of rear end fins by notching the rear end part of a pipe stock to be inserted to a mandrel mill. CONSTITUTION: V-notches 11 corresponding to the circumferential elongation at the rear end in the mandrel...  
JPS6466006A
PURPOSE: To expand the adequate set ranges of a roll gap and plug position to obviate the generation of defects by determining one rolling roll as a reference roll and correcting the spacing of the other rolling roll from a rolling pass ...  
JPS6444204A
PURPOSE: To improve productivity and to manufacture a long-sized pipe by executing a hot rolling under the conditions that the heating temp. of the billet of titanium, the piercing ratio of an inclined piercing machine and the reeling ti...  
JPS6440104A
PURPOSE: To improve the product quality and productivity by rolling a stock with an antiseize agent prepared by mixing boron nitride powders and a binder between guide shows and the rolled stock. CONSTITUTION: Rolling is performed by a d...  
JPS6420901U  
JPS6431504A
PURPOSE: To constrain the generation of a plugging by varying the crossed angle of an inclined roll or the roll opening in the closing direction of the roll outlet side in the case of the bottom part of the material to be worked drawing ...  
JPS6431505A
PURPOSE: To simplify a process and to save a space by specifying the relation of an inclined angle and crossed angle, the diameter of a solid billet and the outer diameter, thickness of a hollow piece and specifying a piercing ratio, pip...  
JPS6431503A
PURPOSE: To execute rolling with low thickness deviation rate by moving in the rolling direction the vibration restraining means holding the outer periphery of the mandrel bar of the vicinity of the tip part and the outer periphery of th...  
JPS6415601U  
JPS6418510A
PURPOSE: To prevent abnormal vibrations during rolling by shifting the central point between both guide shoes by a some distance in one side direction against the roll central line linking both rolling roll axes and giving a peripheral s...  
JPS6418509A
PURPOSE: To bring a device to be a small size by installing a shift cap at the top of a screw down screw and a piston abutting on the cap and retracting the piston in the direction to opposite to the screw down direction through a hydrau...  
JPS6418508A
PURPOSE: To improve the quality and yield of tubes by using a mandrel as a core material and adjusting cross angles of tilting rolls by measuring a height of spiral traces. CONSTITUTION: A mandrel bar 20 is installed as a core material a...  
JPS6410302U  
JPS6411006A
PURPOSE: To prevent defects of an outer surface and miss roll and to improve the quality and yield by limiting heating temp. of a solid billet and the surface temp. of the solid billet at an inlet side of a roll and by setting a tilt ang...  
JPS6411007A
PURPOSE: To stably roll a thin thickness sized-pipe or a large thickness reducing pipe by adding the force to a plug inversely to the rotating direction of each rolling roll of a skew rolling mill to perform the rolling. CONSTITUTION: As...  
JPS645607A
PURPOSE: To improve efficiency, yield and quality by specifying a surface temp. of a blank pipe, rolling ratio, roll tilt angle and roll cross angle in the stage of forming a seamless pipe of a titanium material by two rolls skew rolling...  
JPS63202402U  
JPS63202403U  
JPS63202401U  
JPS63317204A
PURPOSE: To remarkably improve the stress and corrosion cracking resistance of a two-phase stainless steel tube by performing hot rolling of a seamless tube stock at a temp. between two phases temp. of austenite and ferrite. CONSTITUTION...  
JPS6365405B2  
JPS6364246B2  
JPS6364250B2  
JPS63303640A
PURPOSE: To execute the forming of a spiral fin simultaneously with pipe making by using the inclined rolling mill having plural grooves on the outer peripheral face of a rolling roll, executing the punch rolling of a solid metal bar by ...  
JPS6364248B2  
JPS63299805A
PURPOSE: To work a seamless pipe at a high reduction ratio to a small thickness by holding the inclination angle β and intersection angle γ of cone type rolls which are supported at both ends and are provided to face each other on both...  
JPS63293111A
PURPOSE: To manufacture the titled seamless pipe excellent in toughness and sulfide stress cracking resistance without causing deterioration in strength, by subjecting a martensitic stainless steel billet to hot piercing rolling and by s...  
JPS63286208A  
JPS63281705A
PURPOSE: To prevent generation of defects such as cracks and spills and to manufacture seamless steel tubes with high productivity by heating a billet at a temp. lower than a boundary temp. of a dual phase region and pierce- rolling the ...  
JPS63174903U  
JPS63174902U  
JPS63268526A
PURPOSE: To improve the forming accuracy of a work by fitting a roller die to a supporting shaft freely rotatably and arranging the supporting shaft for the rotary center shaft of a core metal with its angle variable. CONSTITUTION: A cor...  
JPS63268504A
PURPOSE: To improve the dimensional accuracy and productivity of products by installing tilt rolling mills into tandem and rolling a stock by setting a roll tilt angle of the downstream side mill to be larger than that of the upstream si...  
JPS63262447A  
JPS63260612A
PURPOSE: To improve the quality by integrally installing a supporting shaft which is inserted into the inside of a roll and supports the roll with an inside bearing of the roll on the stock inlet side part of a yoke and supporting the ou...  
JPS63260611A
PURPOSE: To make a roll compact with a large crossing angle and to improve the quality by installing respective inside bearings in the stock inlet and outlet side parts of a roll and supporting the roll by a supporting shaft and also sup...  
JPS6353884B2  
JPS6353885B2  
JPS63163202U  
JPS63256205A  
JPS63248502A
PURPOSE: To improve the product quality by setting both face angles of the expansion part and the sizing part of a roll within respective specific angle ranges and installing the reeling part of a plug to face to the roll sizing part. CO...  
JPS63248503A
PURPOSE: To prevent generation of product flaws by setting the outlet side roll face angle of main rolls to be larger than a specific angle, forming a small projection on the top of a plug, and setting a side peripheral face taper angle ...  
JPS63242405A
PURPOSE: To improve the correction effect for wall thickness deviation of a metal tube by installing a plug positioner at a prescribed position in the rolling direction and rolling a stock for a prescribed period after a rolling start wi...  
JPS6338006Y2  
JPS63238907A
PURPOSE: To obtain seamless tubes without inner surface flaws by rolling the rear end part of a rolled stock so that a thickness of the rear end part is thicker than that of other parts and adjusting an opening between slant rolls and an...  
JPS63238909A
PURPOSE: To prevent generation of inner surface flaws in thin wall piercing rolling by maintaining a slant and a crossing angles of double-support cone-type rolls oppositely installed each other in respective sides of the pass line in sp...  
JPS63238908A
PURPOSE: To prevent generation of flares and to obtain good quality hollow tube stocks by setting all of an opening between slant rolls, a gap between both guide shoes, and an advancing amount of a plug to meet related requirements under...  
JPS63230205A
PURPOSE: To prevent the development of crack at end part of starting side of piercing and to produce a free-cutting steel-made steel pipe at good yield by specifying the outer diameter at the end part of starting side for piercing to the...  
JPS63145502U  
JPS63220907A
PURPOSE: To prevent the generation of a hole and to improve quality by increasing the advancing amt. of a plug by moving it the reverse direction to the progressing direction of a rolling blank stock at the initial piercing time of the r...  

Matches 1,401 - 1,450 out of 2,201