Document |
Document Title |
JPH0536121B2 |
In a rolling mill plant for the manufacture of seamless tubes, a piercing mill (2), a planetary skew rolling mill (15) and a sizing or stretch-reducing rolling mill (18) are arranged one after the other. In order to improve the output an...
|
JPH05123742A |
PURPOSE: To efficiently manufacture the thin wall long size tube inexpensively by reducing the wall thickness with the skew roll and easily drawing out the core metal rod too, at the manufacturing time of the tube. CONSTITUTION: In the t...
|
JPH05123714A |
PURPOSE: To easily adjust a mutual position between disk rolls and fixed guide shoes used as guide members for a material to be rolled. CONSTITUTION: Round a pass center line X-X of a solid billet, guide holders 5 are positioned on one s...
|
JPH0532121B2 |
|
JPH0527483B2 |
|
JPH0523842B2 |
In a method of manufacturing seamless tubes according to the present invention, piercing from a solid billet can be accomplished through one pass by means of a piercing mill ao the present invention, piercing from a solid billet can be a...
|
JPH0569012A |
PURPOSE: To prevent defective biting by retracting a plug to the outlet side of rolls by narrowing the roll gap after the tip of a tube stock is bitten between the rolls and advancing the plug by enlarging the roll gap after the end of t...
|
JPH0520165B2 |
|
JPH0520163B2 |
|
JPH0520164B2 |
|
JPH0510963Y2 |
|
JPH0510962Y2 |
|
JPH0550117A |
PURPOSE: To suitably control the length of a steel tube through a sizing mill of the final stage of rolling by fixing stands on the final outlet sides of plural sizing mill stands to the maximum defined number of rotation and making the ...
|
JPH055202U |
[Purpose] Provided is a ring material rolling apparatus in which ring material can be easily inserted and removed. [Constitution] Two rolling rolls 6 and 7 are supported on the housing 1 via the driving side axle boxes 2 and 3 and the wo...
|
JPH055562B2 |
|
JPH057990A |
PURPOSE: To prevent a flow generated in inside of a pipe by casting a cast slab for a continuous casting having the specific value of length ratio of a long side and a short side at a specific temp. and rolling the cast slab at the speci...
|
JPH05305A |
PURPOSE: To provide means for preventing rolling flaws on the outer surface of tube that bring troubles of cost and productivity in the time of manufacturing a seamless tube of high chromium steel by Mannesmann rolling process. CONSTITUT...
|
JPH051085B2 |
|
JPH04371307A |
PURPOSE: To secure a prescribed target length by reducing the variation in length in the final stage of rolling. CONSTITUTION: The actual length of a base stock which is obtained in the stage just before the final stage of rolling is com...
|
JPH0479725B2 |
|
JPH0450962Y2 |
|
JPH0475082B2 |
|
JPH0472601B2 |
|
JPH04319002A |
PURPOSE: To provide a small inclined planet roll device with high rigidity by restraining fixing one of two input shafts. CONSTITUTION: One or more kinds of working rolls 1, back up rolls 2 or reinforced rings 5 are driven. At the time o...
|
JPH04316831A |
PURPOSE: To efficiently subject a shaft material such as a pipe material or a rod material to twist elongation processing at a high speed by selecting a path so as to specify the surface twist angle of the shaft material on an outlet sid...
|
JPH04309402A |
PURPOSE: To obtain the seamless steel pipe having the performance equal to the performance of a SUS 304 stainless steel by using a SUS 304L stainless steel without executing a soln. heat treatment. CONSTITUTION: This invention relates to...
|
JPH04294804A |
PURPOSE: To offer a means for restraining the generation of wrinkle-like defects on the outer surface when a solid billet is pierced by hot piercing rolling. CONSTITUTION: The solid billet 4 which is heated in a rotary hearth furnace 1 i...
|
JPH0464761B2 |
|
JPH04284904A |
PURPOSE: To prevent a cutting surface from being oxidized continuously by atmosphere and to thin the material through hot rolling by carrying out piercing rolling, removal of an oxidized layer, sealing the inside and outside surfaces of ...
|
JPH04113101U |
|
JPH0461722B2 |
|
JPH04274807A |
PURPOSE: To prevent the generation of seizure on guide shoe surfaces. CONSTITUTION: The piercing machine 10 constituted by disposing a pair of inclined rolls 11 so as to face each other, disposing a plug 12 at the center of the rolling r...
|
JPH04274806A |
PURPOSE: To prevent the tube end crack and the rolling trouble, and to improve the rolling work efficiency and the yield of a product, at the time of manufactur ing a seamless alloy steel tube. CONSTITUTION: Common steel square pieces 3,...
|
JPH0459982B2 |
A method of fabricating a tube (10') having enlarged ends (14',16') and made of material which can be strengthened by cold working comprises fabricating a pre-form having the overall configuration of the tube but with increased outside d...
|
JPH0459963B2 |
|
JPH04266411A |
PURPOSE: To provide a shaft material working device easy to change a pair of rollers by making up a pair of inclined rollers to clamp and advance the shaft material into such a state that they are twisted in a cage as skelton round a pas...
|
JPH04266405A |
PURPOSE: To enable manufacture of an inside grooved steel tube provided with a reasonable shape though the thickness is large. CONSTITUTION: The manufacturing device of an inside grooved seamless steel tube having a pair of rolling rolls...
|
JPH0457401B2 |
|
JPH04251604A |
PURPOSE: To beforehand prevent the generation of abnormality of peeling, buckling, etc., by restraining bottom flare in the terminal part of tube at the time of skew rolling using a piercer, elongater, etc. CONSTITUTION: The terminal of ...
|
JPH04231105A |
PURPOSE: To embody elongating and rolling with the highest possible efficiency without the deterioration of quality with a smaller number of roll stands by minimizing the number of the roll stands as far as possible. CONSTITUTION: The ro...
|
JPH04224009A |
PURPOSE: To manufacture a seamless stainless steel tube excellent in the outside quality of the tube by minimizing surface defects by an elongator and forming titanium film on the surface, whereon flaws do not grow in spite of reduction ...
|
JPH04224004A |
PURPOSE: To obtain a rotary ring mill easy to bite material. CONSTITUTION: In the rotary ring mill wherein the barrel parts of rolls are brought into contact with the inside surface of a driving ring and a tube or a bar is worked between...
|
JPH0446647B2 |
|
JPH0446646B2 |
The invention concerns a tube release roll mill with four or more driven rolls, which in pairs form a pass opening. The diagonally positioned identically constructed rolls have an enlarged working surface width. A certain roll pair spaci...
|
JPH0446645B2 |
A process and apparatus for the production of seamless tubing incorporating a push bench is provided in which ingots are pierced in the longitudinal direction by diagonal rolls over the stopper rods of a piercing mill to provide pierced ...
|
JPH04182008A |
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...
|
JPH04178204A |
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...
|
JPH04172112A |
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 ...
|
JPH04167905A |
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...
|
JPH04158908A |
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...
|