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1. 发明专利

JPS579526A MANUFACTURE OF SQUARE SHAPED METALLIC TUBE THROUGH CONVEX ROLL 失效
公开(公告)号：JPS579526A
公开(公告)日：1982-01-19
申请号：JP8445180
申请日：1980-06-21
申请人： NIPPON STEEL CORP , NIPPON STEEL METAL PROD
发明人： WATANABE SHIYOUZOU , OGAWA SEIICHIROU , SOGAWA HISASHI , KAJI EIKICHI , AKAHORI AKIO , ONDA HIROTAKU , HAGA HIROTSUGU , AOKI KAZUO
IPC分类号： B21C37/15 , B21D5/12
摘要： PURPOSE:To produce a square shaped metallic tube efficiently and with a slight inflicted change in the mechanical property of material by guiding a corner-bended blank material of a square shaped tube to welding rolls, performing butt welding its edges and leveling four side faces. CONSTITUTION:A beltlike material 1 is bent at positions 4, 4 so as to leave widths in both end parts by an upward cornerbending roll 3, the middle part of 4, 4 is then bent so as to make right and left sides and a downward side. Then, forcing a fin roll 9a into a gap between edges of upward opening, and pushing a blank material in a caliber consisting of a frange roll 9b, right and left side rolls 9c and a lower roll 9d from 4 sides, thereby its cross section gets near a square shape. A welding roll 10 is then screwed-down and is fitted to the upper and lower rolls and right and left side rolls, then performing an electric butt welding the edge of the downward opening, thereby, a square shaped metallic tube 12 having a welding juncture 11 on its upward side face is made. This tube 12 is adjusted its sectional shape and its longitudinal shape through a Turk's head roll 13 for leveling, and is cut by a desired length to make a product.

2. 发明专利

JPH04161655A FLOOR PANEL SUPPORTING STRUCTURE OF FREE ACCESS FLOOR 失效
公开(公告)号：JPH04161655A
公开(公告)日：1992-06-05
申请号：JP28877490
申请日：1990-10-26
申请人： NIPPON STEEL METAL PROD
发明人： KAJI EIKICHI , AKAHORI AKIO , ETO FUMIO , TOMITA MASANORI
IPC分类号： E04F15/00 , E04F15/024
摘要： PURPOSE:To easily and efficiently carry out floor-panel laying operation by pressedly fitting end-swelled members provided to a panel support of a supporting leg into the engaging holes provided on the floor panels. CONSTITUTION:A floor panel 10 is of a hollow structure in which a bottom plate 14 is welded to the undersurface of a sequare upper steel plate 13. And, a supporting leg 12 is made up of a plastic layer 15 provided at its bottom, and a supporting bolt 16 having a groove 16a at its top. Further, a panel support 17 screwed onto the supporting bolt 16 for adjusting the height of the floor panel, and steel balls 18 of a diameter D fixed to the panel support are provided. And the engaging hole 19a (not shown) of a grommet 19 of an elastic material provided to the corner part of each of the four floor panels 10 which are to be supported by the supporting leg 12 is pressedly fitted from above onto the steel ball 18 on the panel support 17 of the supporting leg 12, so that the floor panel 10 is fixed to the supporting leg 12. Thus, the floor panel and the supporting leg can be fixed without requiring bolts and nuts, so that workability can be enhanced.

3. 发明专利

JPH0261337B2 失效
公开(公告)号：JPH0261337B2
公开(公告)日：1990-12-19
申请号：JP19301983
申请日：1983-10-15
申请人： NIPPON STEEL METAL PROD
发明人： KAJI EIKICHI , SAIGO SHIRO , TSUNODA HIROSHI
IPC分类号： B21D53/00 , B21D13/00 , B21D13/04 , B23D15/06

4. 发明专利

JPH05161919A ROLL FORMING APPARATUS 失效
公开(公告)号：JPH05161919A
公开(公告)日：1993-06-29
申请号：JP35107291
申请日：1991-12-11
申请人： NIPPON STEEL METAL PROD
发明人： AKAHORI AKIO , TAKANO NORIKAZU , TOMITA MASANORI , MOTOKI KENICHI , KAJI EIKICHI
IPC分类号： B21D5/08
摘要： PURPOSE:To efficiently recombine rolls when the size of a formed product is changed and to eliminate the need for a crane. CONSTITUTION:The feed drive for a metal plate is carried out by exclusive pinch rolls 23, 25, 27, 28 for feed drive. A lip part is formed at a lip forming zone 24, a flange part is formed at a flange forming zone 26 after the lip part is formed, The lip forming zone 24 is made up of one kind of roller die face plate unit 70 and used in common for different sizes of products. The flange forming zone 26 is provided with three exclusive roller die face plate units 31, 32, 33 corresponding to three product sizes in parallel so that they form three lines of a central line, and right and left lines. Further, all groups of these roller die face plate units are made so that they can move right and left in one body. When the size of the product is changed, all the groups of roller die face plate units are moved right or left and a desired roller die face plate unit is used.

5. 发明专利

JPH08276224A DIE FOR FORMING TAPERED SQUARE TUBE 失效
公开(公告)号：JPH08276224A
公开(公告)日：1996-10-22
申请号：JP10063295
申请日：1995-03-31
申请人： NIPPON STEEL METAL PROD
发明人： AKAHORI AKIO , MIYATA TSUTOMU , KAJI EIKICHI
IPC分类号： B21C37/18 , B21D22/26 , B21D24/00 , B21D41/04
摘要： PURPOSE: To obtain a die for forming a tapered square tube whose life is satisfactorily long and economicity is higher. CONSTITUTION: The die 2 for forming the tapered square tube consists of a truncated pyramid-shaped male die 3 and a female die 4 corresponding to the male die. The female die 4 is taken as an insert structure consisting of a core die 10 which is brought into contact with the outside of a square tube 1a of a base stock and a hollow reinforcing ring die 11 which is fit on the outer periphery of that core die 10. At the time of drawing, large surface pressure acts on the inside 10a of the core die 10 of the female die 4, but a portion of the horizontal component of the surface pressure is effectively borne with the reinforcing ring die 11. That is, the core die 10 is reinforced with the ring die. By using kinds of steel having high wear resistance for the core die 10 and kinds of steel having high tensile strength and toughness for the reinforcing ring, the forming die whose life is satisfactorily long and economicity is higher is obtained.

6. 发明专利

JPH0380568B2 失效
公开(公告)号：JPH0380568B2
公开(公告)日：1991-12-25
申请号：JP7146985
申请日：1985-04-04
申请人： NIPPON STEEL METAL PROD
发明人： KIUCHI MANABU , KAJI EIKICHI , AKAHORI AKIO , ETO FUMIO
IPC分类号： B21D5/01 , B21D5/02

7. 发明专利

JPS633691B2 失效
公开(公告)号：JPS633691B2
公开(公告)日：1988-01-25
申请号：JP15316381
申请日：1981-09-28
申请人： NIPPON STEEL METAL PROD
发明人： KAJI EIKICHI , ONO EIJI , OKAMOTO TOSHIO
IPC分类号： B21D3/05 , B21D3/08 , B21D5/08

8. 发明专利

JPS6115769B2 JPS6115769B2 - 失效
公开(公告)号：JPS6115769B2
公开(公告)日：1986-04-25
申请号：JP7857780
申请日：1980-06-11
申请人： Nippon Steel Metal Prod
发明人： WATANABE SHOZO , OGAWA SEIICHIRO , SOGAWA HISASHI , KAJI EIKICHI , AKAHORI AKIO , ONDA HIROTAKU , HATAIWA KENICHI
IPC分类号： B21C37/15 , B21D5/12

9. 发明专利

JPS574320A MANUFACTURE OF SQUARE STEEL PIPE 失效
公开(公告)号：JPS574320A
公开(公告)日：1982-01-09
申请号：JP7857780
申请日：1980-06-11
申请人： NIPPON STEEL METAL PROD
发明人： WATANABE SHIYOUZOU , OGAWA SEIICHIROU , SOGAWA HISASHI , KAJI EIKICHI , AKAHORI AKIO , ONDA HIROTAKU , HASHIIWA KENICHI
IPC分类号： B21C37/15 , B21D5/12
摘要： PURPOSE:To manufacture a square steel pipe while preventing the reduction of wall thickness at the corners, by applying a butt welding to side edges for forming a square blank pipe wherein the outside radius of curvature of corners and the outside circumferential length are respectively made pescribedly larger than those of a purposed product, and by passing this square blank pipe through a sizing mill. CONSTITUTION:A flat steel sheet material is bent at each of four corners, and the longitudinal side edges are butt welded to form a square blank pipe. Hereupon, the outside radius of curvature of each corner is limited in a range from 1.2 times the outside radius of curvature of the corner of a purposed product to less than the radius of a parent pipe which is defined as follows. That is, the parent pipe is a round pipe having a diameter obtained by dividing the outer circumferential length of the said square blank pipe by the circular constant pi. Moreover, the outer circumferential length of the square blank pipe is made 1.002-1.02 times the outer circumferential length of the product. The square blank pipe with thus regulated dimensions is passed through a sizing mill in order to finish it into a square steel pipe with the prescribed shape and dimensions of the product. According to the present method, the reduction of wall thickness to be caused by the corner bending work is restored so that a wall thickness larger than the initial sheet thickness can be obtained.

10. 发明专利

JPH01205821A COLD ROLL FORMING EQUIPMENT 失效
公开(公告)号：JPH01205821A
公开(公告)日：1989-08-18
申请号：JP3061588
申请日：1988-02-12
申请人： NIPPON STEEL METAL PROD
发明人： AKAHORI AKIO , MOTOKI KENICHI , TAKANO NORIMORO , TOMITA MASANORI , KAJI EIKICHI
IPC分类号： B21D5/08
摘要： PURPOSE:To surely adjust plate thickness with a simple operation and to reduce the adjusting time by setting a roller holder to support a pressure roller for a forming unit so that the roller holder can rotate in the direction of plate thickness centering a supporting pin. CONSTITUTION:The adjustment of plate thickness is carried out by changing a plate thickness adjusting liner 24 of the roller holder 17 supporting the pressure roller 14 with a prescribed liner corresponding to the plate thickness of material. This change is performed by loosing a screw 25, removing the plate thickness liner 24, inserting a new plate thickness adjusting liner 24, tightening and fixing the screw 25. The angle of rotation centering the supporting pin 23 of the roller holder 17 is regulated by this change of the plate thickness adjusting liner 24 and the pressure roller 14 is displaced in the direction of a bisector of a corner part to make a clearance corresponding to a prescribed plate thickness. As a result, the plate thickness adjusting operation is simplified and the adjusting time is reduced.

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