• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A pierced metal blank having an annular cross-section with one end closed and the other end open for use in the manufacture of seamless tubes has a bore with portions of different diameters, the portion of larger diameter, which is adjacent the open end of the blank has a wall thickness which is less than that of the portion of smaller diameter which is adjacent the closed end of the blank. Preferably there is a conical transition between the two portions of different diameters. The blank is preferably made from a metal billet of square cross-section in a substantially cylindrical piercing mould by piercing the billet within the mould by means of a stepped mandrel which presses the material of the square billet outwards into contact with the cylindrical wall of the mould.
    公开号:SU724078A3
    申请号:SU772453851
    申请日:1977-02-11
    公开日:1980-03-25
    发明作者:Вебер Франк；Ерихо Эрвин；Фридрихс Вернер
    申请人:Айзенверк Гезельшафт Максимилиансхютте Мбх (Фирма)；
    IPC主号:
    专利说明:

    meter D to a step of smaller diameter d. The liner wall is made with a smooth outer surface that can be either cylindrical or tapered with the top of the cone pointing to the bottom 5. Such a liner design makes it possible to manufacture pipes with different inner diameters without replacing the square dies the same sizes.
    The optimum ratio of the internal diameters of the steps of the sleeve D: d 1.02 - 2: 1.
    At the same time, the optimum mercury length iJ of the step of smaller diameter d to the length of the transition section is from 1-5: 1, the ratio L: d is 0.2-5: 1.
    If these conditions are met, the sleeves can be pre-rolled with great force, for example, at a rolling mill or on a stretch press.
    The sleeve can be made in a piercing press with a matrix b, ejector 7, punch 8 from square billet 9 using stepped mandrel 10-. ,: .....
    When flashing a conventional square billet 9, the longitudinal edges of which are adjacent to the inner walls. The PD matrix 6, and the front side rests on the ejector 7, the mandrel 10, the predol initial resistance of the material, insert ei-c into the workpiece and at the same time displace the material of the workpiece in the radial direction.
    The finished sleeve can be rolled on a rolling mill 11 using a staged mandrel bar 12, pre-rolling can be carried out in a stretch press. When complying with the scientific research institute of these relations D: d HL: d, it is possible to roll with great effort.
     "
    权利要求:
    Claims (3)
    [1]
    1. A liner for the manufacture of seamless pipes, having a bottom and a wall, the inner surface of which is stepped with a step
    5 of a smaller diameter adjoining the bottom and a step of a larger diameter by means of a transition section, characterized in that, in order to improve the efficiency of its manufacturing process, the wall is made with a cylindrical outer surface or with a conical outer surface with a cone apex directed to the bottom .
    [2]
    2. A liner according to claim 1, characterized in that the ratio of the diameters of the steps of the inner surface is 1.02-2: 1.
    [3]
    3. The liner according to PP.1 and 2, about tl and tacho, with the fact that the ratio of the length of the steps is smaller than the diameter
    to the length of the transition section is from 1 - 5: 1.
    Sources of information taken into account in the examination
    1. The patent of Germany No. 1298494, cl. 7 g 5/10, 1970 (prototype).
    IS uh
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU724078A3|1980-03-25|Sleeve for making seamless tubes
    US4301672A|1981-11-24|Process for forming semi-float axle tubes and the like
    US3176494A|1965-04-06|Extrusion press
    US3744290A|1973-07-10|Production of intermittently fluted tubes
    US3391561A|1968-07-09|Process and apparatus for producing cylindrical tubular bodies from blooms
    US4487049A|1984-12-11|Working mandrel and method of rolling elongate hollow pieces in a multi-stand continuous mill on same working mandrel
    US2819790A|1958-01-14|Process for the manufacture of seamless tubes by the thrust bench method from open and perforated blanks
    JP2006231354A|2006-09-07|Method of manufacturing ultra thin-walled seamless metallic tube
    JPS5630015A|1981-03-26|Continuous rolling method for pipe
    GB1426274A|1976-02-25|Method of and apparatus for making ball studs
    JPS55103208A|1980-08-07|Manufacture of seamless metallic pipe with small diameter
    JPS5466365A|1979-05-28|Piercing method for pipe material
    JPS57187114A|1982-11-17|Manufacture of square steel pipe
    JPS60154810A|1985-08-14|Controlling method for rolling of pipe
    US1999324A|1935-04-30|Method of producing an end thickening in tubular bodies made by rolling with skew rolls
    SU707651A1|1980-01-05|Method of producing chamfers and beads in sheet articles
    SU378267A1|1973-04-18|TRIM MILL EDGE
    SU588029A1|1978-01-15|Cross-helical rolling mill roll
    JPS5823512A|1983-02-12|Manufacturing equipment for seamless metal pipe
    SU1172622A1|1985-08-15|Method of producing conical cold-rolled tubes
    JPH01202311A|1989-08-15|Method for expanding steel pipe in punched pipe
    RU2572682C2|2016-01-20|Fabrication of sandwiched hollow billet
    JPH03243209A|1991-10-30|Grooving method on inner surface of metallic tube
    SU631238A1|1978-11-05|Method of making hollow body parts
    SU1355339A1|1987-11-30|Method of moulding flanges on hollow cylindrical part
    同族专利:
    公开号 | 公开日
    DE2605236A1|1977-08-25|
    DE2605236C2|1982-12-30|
    AT368727B|1982-11-10|
    ATA73377A|1982-03-15|
    JPS5621482B2|1981-05-20|
    ES455809A1|1978-01-01|
    CS191187B2|1979-06-29|
    FR2340786A1|1977-09-09|
    JPS52119460A|1977-10-06|
    FR2340786B1|1982-12-03|
    HU173989B|1979-10-28|
    BE851284A|1977-05-31|
    IT1081935B|1985-05-21|
    US4262516A|1981-04-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1314366A|1919-08-26|Apparatus for forming hollow articles |
    DE150722C|1902-02-14|
    US520296A|1894-05-22|caylet |
    DE105758C|
    DE67921C|H. EHRHARDT in Düsseldorf|Process for punching and simultaneously shaping iron and steel blocks in a heated state|
    DE121373C|
    US495245A|1893-04-11|exxrhardt |
    DE72573C|H. EHRHARDT in Düsseldorf.|Process for punching and simultaneously shaping iron and steel blocks in a heated state.|
    US796223A|1903-07-09|1905-08-01|Krupp Gmbh|Process for the manufacture of seamless metallic hollow bodies by means of matrix and die.|
    FR491251A|1915-10-14|1919-05-28|Louis Renault|Hot-drilling process for slips|
    US1171344A|1915-10-29|1916-02-08|Grover Butz|Apparatus for concentric punching.|
    GB102898A|1916-08-04|1917-01-04|John Harper Bean|An Improved Method of and Means for the Manufacture of Projectiles.|
    US1347415A|1918-08-02|1920-07-20|Frank A Sherman|Method and apparatus for making shell-forgings|
    GB431835A|1934-01-03|1935-07-16|Alfina Immobilien Finanzierung|Improved manufacture of thick-walled, cylindrical hollow iron bodies open at one end|
    US2278325A|1938-10-12|1942-03-31|Lansdowne Steel & Iron Company|Process for finishing forgings|
    US2248002A|1938-10-12|1941-07-01|Lansdowne Steel & Iron Company|Apparatus for finishing forgings|
    GB569126A|1939-07-20|1945-05-07|George Baker|Swaging of hollow bodies|
    US2299105A|1940-03-18|1942-10-20|Dominion Eng Works Ltd|Method and apparatus for forging billets|
    US2339019A|1942-01-31|1944-01-11|Letourneau Inc|Blank forging machine|
    US2642647A|1951-03-02|1953-06-23|Jr Patrick J Culhane|Method of making shell forgings|
    US2739372A|1951-03-30|1956-03-27|United States Steel Corp|Method of making propeller-blade blanks|
    FR1084730A|1953-06-12|1955-01-24|Aspen Trust|Improvements to processes for forging or stamping hollow parts|
    DE1099317B|1953-07-03|1961-02-09|Max Liebergeld|Vorwerkstueck for the production of hollow bodies from steel by cold pressing in the die|
    CH334020A|1954-02-03|1958-11-15|Liebergeld Max|Process for the cold forming of cavities in bodies made of metal|
    FR1169519A|1955-04-23|1958-12-29|Armements Et De Moteurs Soc De|Improvements in processes for shaping hollow parts|
    DE1081853B|1956-06-06|1960-05-19|Pompey Acieries|Method for producing hollow bodies open on one side by punching a block and then stretching out the hole in a push bench|
    US2917823A|1957-12-09|1959-12-22|Gen Motors Corp|Method of cold forming tubular bodies having internal undercut grooves|
    DE1139356B|1958-11-17|1962-11-08|Svenska Metallverken Ab|Process for the production of a tubular hollow body made of metal|
    FR1385389A|1963-07-31|1965-01-15|Piston manufacturing process|
    DE1298494B|1966-01-28|1969-07-03|Maximilianshuette Eisenwerk|Perforated square block as an intermediate product for the production of seamless tubes and processes for further processing of the square block|
    JPS5749866B2|1972-08-09|1982-10-25|JPS57201858U|1981-06-18|1982-12-22|
    DE3140015A1|1981-10-08|1983-04-21|Kocks Technik Gmbh & Co, 4010 Hilden|PLANT FOR PRODUCING SEAMLESS TUBES|
    ES8300523A1|1982-01-14|1982-11-01|Martinez Garin De Lazcano J Ig|A compound metallic body.|
    JPS58159920A|1982-03-18|1983-09-22|Sumitomo Metal Ind Ltd|Method and apparatus for making pipe by ironing|
    US4512069A|1983-02-04|1985-04-23|Motoren-Und Turbinen-Union Munchen Gmbh|Method of manufacturing hollow flow profiles|
    JPH0217513Y2|1987-07-20|1990-05-16|
    EP1193720B1|2000-04-25|2017-01-11|Japan Casting & Forging Corporation|Billet for a radioactive substance containment vessel producing method|
    EP2209128B1|2009-01-20|2015-03-04|ABB Research Ltd.|Gapped magnet core|
    CN102527758B|2012-01-20|2014-12-03|东莞汉旭五金塑胶科技有限公司|Extrusion moulding die for aluminum base of radiator and manufacture method thereof|
    CN109859862A|2019-01-31|2019-06-07|西部新锆核材料科技有限公司|A kind of zircaloy fuel assembly guide pipe and preparation method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2605236A|DE2605236C2|1976-02-11|1976-02-11|Use of a piercer and a die to produce a perforated piece|
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