Document |
Document Title |
JPH0128641B2 |
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JPH01127108A |
PURPOSE:To improve the biting capability and to restrain generation of internal flaws by shortening a plug lead until a position of the side end part in the transfer direction of a seamless tube in piercing stage reaches the side end par...
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JPH01118303A |
PURPOSE: To manufacture a seamless low alloy free-cutting steel tube without generation of defects by limiting a max. heating temp., a piercing ratio, and an outside surface temp. after piercing of a leaded free-cutting steel billet. CON...
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JPH0123202B2 |
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JPH0114325Y2 |
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JPH0114324Y2 |
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JPH01107909A |
PURPOSE: To hold a rolled stock at rolling center and to prevent the generation of a thickness deviation by arranging a liftable turning roller at the outlet side of a rolling mill and adjusting the center position of the rolled stock. C...
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JPS6454902U |
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JPS6454901U |
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JPS6478616A |
PURPOSE: To easily and simply manufacture metallic pipe having a spiral groove on the inner surface by arranging and fixing a plug or a mandrel having the spiral groove on a pathline surrounded by a plurality of rolling rolls and hot- ro...
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JPS6475107A |
PURPOSE: To prevent the flaw generation and to improve a yield by taking the S contents of a steel in the specified amt., deciding the billet heating temp. at the piercer piercing time according to the S contents of the steel and taking ...
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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...
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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 ...
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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...
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JPS6415601U |
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JPS6410302U |
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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...
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JPS63202403U |
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JPS6365405B2 |
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JPS6364246B2 |
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JPS6364250B2 |
In a three-roll Assel mill capable of automatically and rapidly changing the rolls, rails are arranged on an inner housing mounted within each of a fixed housing and a rotary housing to be rotatable along the inner wall thereof, and crad...
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JPS6364248B2 |
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JPS63286208A |
In a device for radially guiding rotating mandrel rods 4 and tubular blooms in the region of skew-rolling stands, all the guide rollers 6 have supporting collars 10 of larger outer diameter which engage between one another in a comb-like...
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JPS63174903U |
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JPS63174902U |
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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...
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JPS6353884B2 |
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JPS6353885B2 |
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JPS63163202U |
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JPS63256205A |
Seamless tubing and pipes are made from solid rounds with a diameter not exceeding 0.8 of the diameter of the tubing or pipe to be made; the method includes the steps of piercing the solid with a mandrel such that a conical widening angl...
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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...
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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 ...
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JPS6338006Y2 |
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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...
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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...
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JPS63145502U |
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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...
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JPS63220909A |
PURPOSE: To prevent thickness deviation and streak and to improve quality by elongating a rolled hollow stock with the roll roll-fitted to the outer periphery of a rolled stock with supporting a plug by its tip side and base end side. CO...
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JPS63220908A |
PURPOSE: To prevent the biting of a scale between a plug and blank pipe and to improve the quality by rolling with extension the roll and plug having the outer peripheral face part in parallel to a pass line with moving in the same direc...
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JPS63212006A |
PURPOSE: To arrange short fibers in the peripheral direction of a tube and to reduce thermal expansion in the radial direction by performing ring rolling work after forming an FRM billet of a thick wall tubular shape by pressure casting....
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JPS63133802U |
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JPS6343162B2 |
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JPS6343161B2 |
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JPS63203205A |
PURPOSE: To improve a plug life and to efficiently obtain a stock pipe having good inside surface quality and dimensional accuracy by joining a tip part consisting of an Mo-base alloy to a plug body part consisting of an alloy having spe...
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JPS6341649B2 |
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JPS63188406A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS63188405A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS63188411A |
PURPOSE: To perform quick opening of a gap between main rolls without increasing the capacity of a driving system by making a drafting nut movable in only the axial direction of a screw shaft and making the nut movable in the reverse dir...
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JPS6327845Y2 |
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JPS63177906A |
PURPOSE: To permit diametral reduction of a pipe with high accuracy by arranging plural pieces of tapered rollers to the tapered inner peripheral face of a rotary die and rotating the die so that the rollers make planatary motion around ...
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