US3893321A - Swaging machine - Google Patents

Swaging machine Download PDF

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Publication number
US3893321A
US3893321A US516009A US51600974A US3893321A US 3893321 A US3893321 A US 3893321A US 516009 A US516009 A US 516009A US 51600974 A US51600974 A US 51600974A US 3893321 A US3893321 A US 3893321A
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US
United States
Prior art keywords
workpiece
mandrel
swaging
feeding head
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US516009A
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English (en)
Inventor
Johann Braunwieser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
Original Assignee
GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
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Application filed by GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG filed Critical GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
Application granted granted Critical
Publication of US3893321A publication Critical patent/US3893321A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools

Definitions

  • ABSTRACT serves to manufacture a tubular workpiece having an elongated, internally cylindrical, intermediate workpiece portion and two opposite workpiece end portions differing in inside diameter from said intermediate workpiece portion.
  • the machine comprises die means defining a swaging zone and op- 1 July 8,1975
  • a mandrel rod extends through said feeding head and carries a mandrel, which is adapted to extend in said workpiece in the longitudinal direction thereof and has opposite mandrel end portions which have outside surfaces conforming to the inside surfaces of respective ones of said workpiece end portions.
  • the mandrel has also a cylindrical intermediate mandrel portion, which has an outside diameter that is equal to the inside diameter of said intermediate workpiece portion and has a length which is larger than the corresponding dimension of said swaging zone and substantially smaller than the length of said intermediate workpiece portion.
  • Control means are provided which when said mandrel extends in said workpiece serve to couple said mandrel rod to said feeding head, so that said mandrel advances in unison with said workpiece, when a workpiece portion intended to form one of said workpiece end portions extends in said swaging zone, to hold said mandrel rod and mandrel in a fixed position when a workpiece portion intended to form said intermediate workpiece portion extends in said swaging zone, and in response to the displacement of said holder-up as it yields to the advancing workpiece to couple said mandrel rod to said feeding head, so that said mandrel advances in unison with said workpiece, when a workpiece portion intended to form the other of said workpiece end portions extends in said swaging zone.
  • a mandrel rod which extends through the feeding head and carries the mandrel and is adapted to be loaded by a piston.
  • a piston which is hydraulically operable to hold the mandrel in a fixed position between the tools whereas the mandrel is adapted to overcome the loading of said piston and to be moved through between the tools as the workpiece is advanced.
  • Shotgun barrels have a chamber portion at the rear end of the barrel. like other firearm barrels. and also have a so-called choke, which is a constricted portion near the muzzle and serves to prevent an excessive scattering of the shot as it leaves the barrel. It will be understood that these difficulties do not arise only in the manufacture of shotgun barrels but also in the manufacture of other tubular workpieces having a similar inside surface. So far.
  • shotgun barrels or similar workpieces are swaged on a mandrel, which exactly conforms to the inside surface of the workpiece.
  • the mandrel is moved through together with the workpiece between the dies so that the tubular workpiece which is initially smooth is shaped to have an inside surface conforming to the mandrel.
  • the swaging operation proceeds from the chamber portion to the choke.
  • This swaging process has the disadvantage that the mandrel has a large length. which is equal to the overall length of the barrel inclusive of the chamber portion and choke. The costs of manufacturing such mandrel are very high because a high precision is required.
  • Eccentricities of the mandrel are permissible only within very small tolerance ranges because otherwise the resulting shotgun barrel does not have the desired quality. This results in a high rate of rejects. Besides, the mandrels have only a short life, particularly when the shotgun barrels are cold-swaged. For this reason, swaging with the aid of a long mandrel is not economical.
  • swaging machines have been provided in which a short mandrel can be used. That mandrel conforms only to the chamber portion and a portion of the barrel proper.
  • the barrel proper is swaged first while that portion of the mandrel which corresponds to the barrel proper remains in a fixed position between the dies.
  • the chamber portion is swaged while the mandrel is moved in unison with the workpiece.
  • the mandrel rod is hydraulically loaded in such a manner that it is not advanced initially in spite of the feeding of the workpiece.
  • a stop is fixed to the feeding head and after a predetermined advance of the feeding head engages a mating surface of the mandrel rod.
  • This stop assists in overcoming the hydraulic loading so that the mandrel is now forced through between the dies at the feeding speed of the workpiece. Owing to its short length. this mandrel can be manufactured at much lower cost and because it can be made from cermets it has a long life. On the other hand. that swaging process has the disadvantage that only the barrel proper and the chamber portion can be swaged in one operation. which must be succeeded by a second operation for shaping the choke.
  • the mandrel has in known manner a shape conforming to the inside surface of the shotgun barrel but that mandrel portion which corresponds to the barrel proper has only a length which is approximately as large as the length of the swaging zone. and that the mandrel rod is adapted to be coupled to the feeding head to move with it in the feeding direction in dependence on the displacement of the holder-up during the swaging operation. Because the intermediate mandrel portion has not the same length as the barrel proper but has only the length which is required for the swaging operation, it must be held in a fixed position between the dies during the shaping of the intermediate portion of the barrel.
  • the mandrel movement iscontrolled in dependence on the displacement of the holder-up.
  • the length of the barrel and of each portion thereof can be determined with the desired accuracy because the length of the previously swaged barrel portion will determine the time at which a new phase of the swaging operation begins.
  • This -is of special significance for the barrel proper which should have exactly a predetermined length with very small tolerances. As soon as the barrel proper has been swaged in the prescribed length.
  • the mandrel rod is automatically coupled to the feeding head so that the .mandrel which was in position of rest is advanced at the feeding speed and the swaging of the chamber portion begins.
  • the mandrel movement and the beginning of a step of the swaging sequence depend on the previously swaged portion of the workpiece because in dependence on the position of the holder-up the mandrel rod is coupled to the feeding head and the mandrel is moved in the feeding direction at the same speed as the feeding head, or the mandrel rod is not connected to the feeding head and the mandrel is held in a fixed position by the hydraulic pressure which acts on the mandrel rod via a piston.
  • the mandrel according to the invention may be of cermets so that it has a long life.
  • a stop is provided which is engageable by the mandrel rod and is displaceable relative to the feeding head'and can be coupled to the latter by a limit switch or the like which is actuable by the holder-up.
  • the limit switch is operated so that the stop is coupled to the feeding head and then acts immediately on the engaging surface of the mandrel rod because said engaging face has engaged the stop some time before the critical instance.
  • the stop now forces the mandrel rod forwardly at the speed of the feeding head so that the workpiece and mandrel move through per fectly in unison between the dies and the desired step of the swaging sequence begins exactly at thedesired point.
  • the stop consists of a hydraulically loaded piston, which is slidable in a cylinder that is fixed to the feeding head and is connected to an inlet and outlet conduit, which is adapted to be shut off by a solenoid valve or the like, which is operable by the limit switch or the like.
  • the solenoid valve shuts off the discharge of the hydraulic fluid so that the fluid forms immediately a hard pad, which cannot be displaced or compressed by the piston.
  • the advance of the feeding head is now transmitted by this fluid pad and the piston to the mandrel rod, which is now moved through together with the workpiece between the swaging dies at the feeding speed and in doing so overcomes the hydraulic pressure which tends to hold the mandrel rod in its position of rest.
  • the mandrel advances and the next step of the swaging sequence begins. For this reason it is possible, e.g., to swage the chamber portion when the barrel proper has been swaged exactly in a predetermined length.
  • FIG. 1 is a partly sectional view showing a swaging machine according to the invention and FIGS. 2 to 5 illustrate the swaging ofa shotgun barrel comprising a choke and a chamber portion in four steps.
  • the swaging machine comprises essentially a swaging box I, dies 2, which are mounted in the swaging box. a feeding head 4, which is slidably guided on a suitable bed 3, and a holder-up 5, for gripping the workpiece, and a stepped mandrel 6 for shaping the inside surface of the shotgun barrel.
  • the mandrel 6 is carried by a mandrel rod 7, which extends through the feeding head and at its free end forms a piston 8, which is slidable in a cylinder 9.
  • the cylinder 9 is slidable in a stationary cylinder 10, which is connected to a constantly pressurized hydraulic conduit 1!. The displacement ofthe cylinder 9 in the cylinder [0 is limited by stops.
  • Hydraulic pressure can be selectively applied through conduit 12 to the piston 8, which is formed by the mandrel rod. Because the piston 8 has end faces of different sizes, the piston 8 and the mandrel rod 7 can be reciprocated in spite of the continuous application of pressure through conduit 11.
  • a cylinder 13 is mounted on the feeding head 4, and a piston 14 is slidable in the cylinder 13 and serves as a stop for an engaging surface 15 provided on the mandrel rod 7.
  • a solenoid valve 17 is incorporated in the conduit 16 connected to the cylinder 13 and either shuts off the conduit [6 or connects it to the supply conduit 16 or the discharge conduit 16". The solenoid valve 17 is controlled by a limit switch 18, which is actuable by the holder-up 5.
  • the feeding head 4 is displaceable by the tie rods 19 in the feeding direction and opposite thereto and as means for engaging the workpiece comprises a piston 20, which is non-rotatably mounted in a sleeve 22.
  • the latter is rotatably and non-displaceably mounted in the feeding head and adapted to be driven by a worm gearing 21.
  • the sleeve 22 defines with the piston 20 a cylinder chamber 23, which is filled with liquid under pressure. This liquid under pressure forms a pad, which applies to the piston 20 a pressure which can be adjusted by a valve, not shown, and is selected so that material can flow toward the feeding head during the swaging ofa shoulder.
  • a neat, continuous internal shoulder can be swaged only when the pressure applied to the workpiece at its feeding head end is reduced during the swaging of the shoulder so that material can flow opposite to the feeding direction and a disengagement of the workpiece is thus prevented.
  • the mandrel 6 used in the swaging of a shotgun barrel has a shape which substantially conforms to the inside surface of the shotgun barrel.
  • the mandrel has a portion 6 conforming to the choke, a portion 6" conforming to the barrel proper, and a portion 6" conforming to the chamber portion.
  • the intermediate portion 6" is not as long as the barrel proper but is only approximately as long as the actual swaging zone.
  • the workpiece is first gripped between the feeding head 4 and the holder-up 5.
  • the holder-up is moved to a position between the dies 2. Hydraulic pressure is then applied through conduit 12 to the piston 8 of the mandrel rod 7, and the mandrel 6 is introduced into the workpiece until the mandrel engages the holder-up 5 (FIG. 2). Then the swaging operation begins.
  • the feeding head 4 performs its feeding movement to move the workpiece together with the mandrel through between the dies and to force back the holder-up 5.
  • the limit switch is actuated by the holder-up so that'the solenoid valve 17 shuts off the conduit 16 connected to the cylinder 13.
  • the feeding head 4 has been displaced relative to the stationary mandrel rod 7 to such an extent that the engaging surface of the mandrel rod 7 has engaged the piston l4 and has forced back the latter as long as the conduit 16 is open. Because the conduit 16 is connected by the valve 17 to the discharge conduit 16'', the liquid can be displaced out of the cylinder 13 and does not impede the movement of the piston.
  • the mandrel rod 7 is thus moved again at the feeding speed and forces the mandrel 6 through between the dies 2 so that the third position 6" of the mandrel now enters the swaging zone and the chamber portion of the shotgun barrel is swaged (FIG. 5).
  • the shotgun barrel has now been completely swaged and by means of the holder-up and the feeding head is returned to its initial position.
  • the piston 8 is then hydraulically operated to withdraw the mandrel from the barrel.
  • the workpiece consisting of the complete barrel is withdrawn from the machine and the machine is prepared for a new swaging sequence.
  • the swaging machine permits of manufacturing a shotgun barrel in one operation and with the aid of a short mandrel.
  • the portions of the shotgun barrel i.e., the choke, the barrel proper and the chamber portion, can be swaged in the required lengths to the desired accuracy.
  • a swaging machine for manufacturing a tubular workpiece having an elongated, internally cylindrical, intermediate workpiece portion and opposite workpiece end portions differing in inside diameter from said intermediate workpiece portion, said machine comprising die means defining a swaging zone and operable to swage a tubular workpiece in said swaging zone,
  • a feeding head and a holder-up which are spaced apart and adapted to engage opposite ends of said 6 tubular workpiece and to grip the same, said feeding head being operable to advance a workpiece thus gripped in its longitudinal direction through said swaging zone, said holder-up being adapted to I ,yield to the workpiece as it is thus advanced, 'giilaaqrwod extending through said feeding head, a rha iidrel carried by said mandrel rod and adapted to extend in saidworkpiece in the longitudinal direction thereofand having opposite mandrel end pol'tiorisjwhich have outside surfaces conforming to the 'inside surfaces of respective ones of said workpiece end portions, said mandrel also having l a cylindrical intermediate mandrel portion, which has an outside diameter that is equal to the inside diameter of said intermediate workpiece portion and which has a length that is larger than the corresponding dimension of said swaging zone and substantially smaller than the length of said intermediate workpiece portion, and
  • control means which when said mandrel extends in said workpiece serve to couple said mandrel rod to said feeding head, so that said mandrel advances in unison with said workpiece, when a workpiece portion intended to form one of said workpiece end portions extends in said swaging zone, to hold said mandrel rod and mandrel in a fixed position when a workpiece portion intended to form said intermediate workpiece portion extends in said swaging zone, and in response to the displacement of said holder-up as it yields to the advancing workpiece to couple said mandrel rod to said feeding head, so that said mandrel advances in unison with said workpiece, when a workpiece portion intended to form the other of said workpiece end portions extends in said swaging zone.
  • control means comprise position-responsive means which are responsive to the displacement of said holder-up in predetermined positions thereof and coupling means for coupling said stop to said feeding head under the control of said position-responsive means.
  • control means comprise a piston which is operatively connected to said mandrel rod
  • a swaging machine as set forth in claim 1. in which m said swaging zone.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Metal Extraction Processes (AREA)
US516009A 1973-12-04 1974-10-18 Swaging machine Expired - Lifetime US3893321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1014773A AT322329B (de) 1973-12-04 1973-12-04 Schmiedemaschinen zum herstellen insbesondere von schrotläufen

Publications (1)

Publication Number Publication Date
US3893321A true US3893321A (en) 1975-07-08

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US516009A Expired - Lifetime US3893321A (en) 1973-12-04 1974-10-18 Swaging machine

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US (1) US3893321A (https=)
JP (1) JPS5086468A (https=)
AT (1) AT322329B (https=)
DD (1) DD117193A5 (https=)
DE (1) DE2448283A1 (https=)
FR (1) FR2252885B3 (https=)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4562719A (en) * 1983-09-23 1986-01-07 Verson Allsteel Press Company Method for drawing heavy wall shells with a multi-step inside edge
US4578983A (en) * 1982-12-01 1986-04-01 Hitachi, Ltd. Press type method of and apparatus for reducing slab width
US4899570A (en) * 1988-04-05 1990-02-13 Teledyne Industries, Inc. Apparatus and method of rotary forging with induction heating
US5046344A (en) * 1990-01-19 1991-09-10 United Engineering, Inc. Apparatus for sizing a workpiece
US5826361A (en) * 1997-03-17 1998-10-27 Jamison; John R. Short-action chamber and bolt assembly for high power firearm cartridge
US5970879A (en) * 1997-03-17 1999-10-26 Jamison; John R. High-power firearm cartridge for short-action chamber and bolt assembly
WO2004016369A1 (en) * 2002-08-16 2004-02-26 Machine Solutions, Inc. Swaging technology
US20070186604A1 (en) * 2003-12-30 2007-08-16 Robert Koppensteiner Method and apparatus for producing a cylindriacal hollow body from a blank
US20070271986A1 (en) * 2003-09-05 2007-11-29 Peter Geser Method and device for making at least partly profiled tubes
GB2424848B (en) * 2003-12-22 2007-12-12 Honda Motor Co Ltd Method of forming member, valve guide and method of forming the valve guide, and method of forming tubular member
WO2009003498A1 (de) 2007-06-29 2009-01-08 Gkn Driveline International Gmbh Vorrichtung und verfahren zum axialumformen von langgestreckten hohlkörpern
US20090044883A1 (en) * 2004-10-25 2009-02-19 V & M Deutschland Gmbh Method of making a seamless hot-finished steel pipe, and device for carrying out the method
US20100199740A1 (en) * 2009-02-11 2010-08-12 Uwe Muschalik Method of and apparatus for making pipe from a tubular workpiece
US20100307045A1 (en) * 2007-11-02 2010-12-09 Transmission Systems Limited Projectile Weapons
RU2446907C2 (ru) * 2010-06-10 2012-04-10 Открытое акционерное общество "Завод им. В.А. Дегтярева" Центр поводковый
CN102470418A (zh) * 2009-07-09 2012-05-23 莱菲尔德金属旋压机有限公司 旋压辊压方法及装置
RU2514246C2 (ru) * 2012-08-16 2014-04-27 Открытое акционерное общество "Завод им. В.А. Дегтярева" Поводковый центр радиально-обжимной машины
CN104028622A (zh) * 2013-03-05 2014-09-10 陈木荣 同径管件加工成形机及其加工方法
RU2532797C1 (ru) * 2013-05-06 2014-11-10 Кожокин Тимофей Иванович Способ изготовления ствола
RU2542223C1 (ru) * 2013-07-30 2015-02-20 Открытое акционерное общество "Завод им. В.А. Дегтярева" Поводковый центр радиально-обжимной машины
US20150082846A1 (en) * 2013-09-25 2015-03-26 GFM - GmbH Apparatus for forging a hollow body from a pre-perforated hollow block
RU2586726C2 (ru) * 2014-05-26 2016-06-10 Кожокин Тимофей Иванович Способ изготовления ствола и устройство для его реализации
RU2591824C1 (ru) * 2015-03-23 2016-07-20 Кожокин Тимофей Иванович Способ изготовления ствола
US20190015885A1 (en) * 2016-03-17 2019-01-17 Repkon Machine and Tool Industry and Trade Inc. Method for producing gun barrels and apparatus for performing such method
CN115870442A (zh) * 2022-12-30 2023-03-31 山东宏桥新型材料有限公司 一种铝合金花键轴叉锻造成型工艺及花键轴叉

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JPS60108444U (ja) * 1983-12-27 1985-07-23 日本ビクター株式会社 成形位置検出装置
US5119662A (en) * 1984-04-16 1992-06-09 Sanwa Kokan Co., Ltd. Methods for cold drawing seamless metal tubes each having an upset portion on each end
US4606212A (en) * 1984-04-16 1986-08-19 Sanwa Kokan Co., Ltd. Device for cold drawing seamless metal tubes having upset portions on both ends
US4726211A (en) * 1984-04-16 1988-02-23 Sanwa Kokan Kabushiki Kaishas Method of cold drawing seamless metal tubes each having an upset portion on each end
JPS6390324A (ja) * 1986-10-01 1988-04-21 Tomishiyou:Kk 金属製配管部品
DE8809031U1 (de) * 1988-07-14 1988-09-22 Schäfer, August Wilhelm, 5962 Drolshagen Vorrichtung zum Kaltverformen eines Metallrohrstückes
DE4307775A1 (de) * 1993-03-12 1994-09-15 Dynamit Nobel Ag Verfahren und Vorrichtung zur Herstellung von hochfesten Rohren
DE19508798C2 (de) * 1994-03-24 2000-11-16 Hmp Engineering Gmbh Verfahren zur Herstellung von Zahnkolbenstangen für Fahrzeug-Hydrolenkungen
JP4748582B2 (ja) * 2005-12-26 2011-08-17 株式会社ジャロック マンドレル可動式スウェージングマシン
DE102010014583A1 (de) * 2010-04-09 2011-10-13 Felss Gmbh Einrichtung einer Rundknetmaschine mit einer Werkstück-Halterung und einer Dornstangen-Halterung
RU2493932C2 (ru) * 2011-10-07 2013-09-27 Открытое акционерное общество "Завод им. В.А. Дегтярева" Способ изготовления ствола и устройство для его реализации
RU2657952C1 (ru) * 2016-12-06 2018-06-18 Кожокин Тимофей Иванович Поводковый центр радиально-обжимной машины (РОМ)
RU2652924C1 (ru) * 2017-05-12 2018-05-03 Тимофей Иванович Кожокин Способ изготовления ствола
DE102021203376B4 (de) 2021-04-06 2025-01-09 Magna powertrain gmbh & co kg Vorrichtung und Verfahren zur kontinuierlichen Herstellung einer zumindest teilweise hohl ausgebildeten Welle mit variierendem Innen- und/oder Außendurchmesser
JP7558394B2 (ja) * 2021-12-06 2024-09-30 株式会社三五 テーパ部を有する円筒体の成形方法

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US1819376A (en) * 1924-08-25 1931-08-18 Muller Friederich Tube swaging machine and method
US2058556A (en) * 1932-01-23 1936-10-27 Otto J Heinzmann Apparatus for making tubular metal articles
US3120137A (en) * 1961-01-03 1964-02-04 Ingersoll Rand Canada Apparatus for forming varying shaped bores in hollow members
US3177688A (en) * 1961-06-06 1965-04-13 Kralowetz Bruno Forging machine for the internal profiling of tubular workpieces, particularly of barrels for firearms
US3753365A (en) * 1971-05-06 1973-08-21 B Kralowetz Swaging machine for the internal profiling of tubular workpieces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819376A (en) * 1924-08-25 1931-08-18 Muller Friederich Tube swaging machine and method
US2058556A (en) * 1932-01-23 1936-10-27 Otto J Heinzmann Apparatus for making tubular metal articles
US3120137A (en) * 1961-01-03 1964-02-04 Ingersoll Rand Canada Apparatus for forming varying shaped bores in hollow members
US3177688A (en) * 1961-06-06 1965-04-13 Kralowetz Bruno Forging machine for the internal profiling of tubular workpieces, particularly of barrels for firearms
US3753365A (en) * 1971-05-06 1973-08-21 B Kralowetz Swaging machine for the internal profiling of tubular workpieces

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4578983A (en) * 1982-12-01 1986-04-01 Hitachi, Ltd. Press type method of and apparatus for reducing slab width
US4562719A (en) * 1983-09-23 1986-01-07 Verson Allsteel Press Company Method for drawing heavy wall shells with a multi-step inside edge
US4899570A (en) * 1988-04-05 1990-02-13 Teledyne Industries, Inc. Apparatus and method of rotary forging with induction heating
US5046344A (en) * 1990-01-19 1991-09-10 United Engineering, Inc. Apparatus for sizing a workpiece
US20040255502A1 (en) * 1997-03-17 2004-12-23 Jamison John R. Ultra-short-action firearm for high-power firearm cartridge
US6354221B1 (en) 1997-03-17 2002-03-12 John R. Jamison High-power firearm cartridge
US6550174B2 (en) 1997-03-17 2003-04-22 John R. Jamison Short-action firearm for high-power firearm cartridge
US6595138B2 (en) 1997-03-17 2003-07-22 John R. Jamison High-power firearm cartridge
US6675717B2 (en) 1997-03-17 2004-01-13 John R. Jamison Ultra-short high-power firearm cartridge
US6678983B2 (en) 1997-03-17 2004-01-20 John R. Jamison Ultra-short-action firearm for high-power firearm cartridge
US5826361A (en) * 1997-03-17 1998-10-27 Jamison; John R. Short-action chamber and bolt assembly for high power firearm cartridge
US5970879A (en) * 1997-03-17 1999-10-26 Jamison; John R. High-power firearm cartridge for short-action chamber and bolt assembly
WO2004016369A1 (en) * 2002-08-16 2004-02-26 Machine Solutions, Inc. Swaging technology
CN100457319C (zh) * 2003-09-05 2009-02-04 恩斯特格罗布股份公司 用于制造至少局部成型的管的方法和设备
US7861572B2 (en) 2003-09-05 2011-01-04 Ernst Grob Ag Method and device for making at least partly profiled tubes
US20070271986A1 (en) * 2003-09-05 2007-11-29 Peter Geser Method and device for making at least partly profiled tubes
GB2424848B (en) * 2003-12-22 2007-12-12 Honda Motor Co Ltd Method of forming member, valve guide and method of forming the valve guide, and method of forming tubular member
US7434434B2 (en) * 2003-12-30 2008-10-14 Gfm Beteiligungs- Und Management Gmbh & Co Kg Method and apparatus for producing a cylindrical hollow body from a blank
US20070186604A1 (en) * 2003-12-30 2007-08-16 Robert Koppensteiner Method and apparatus for producing a cylindriacal hollow body from a blank
US20090044883A1 (en) * 2004-10-25 2009-02-19 V & M Deutschland Gmbh Method of making a seamless hot-finished steel pipe, and device for carrying out the method
US8166792B2 (en) * 2004-10-25 2012-05-01 V & M Deutschland Gmbh Method of making a seamless hot-finished steel pipe, and device for carrying out the method
AU2005299151B2 (en) * 2004-10-25 2011-08-25 V & M Deutschland Gmbh Method for production of a seamless hot-finished steel tube and device for carrying out said method
WO2009003498A1 (de) 2007-06-29 2009-01-08 Gkn Driveline International Gmbh Vorrichtung und verfahren zum axialumformen von langgestreckten hohlkörpern
US20100139356A1 (en) * 2007-06-29 2010-06-10 Ulrich Brochheuser Device and method for the axial forming of elongated hollow bodies
CN101754820B (zh) * 2007-06-29 2012-12-12 Gkn动力传动系统国际有限责任公司 用于细长的空心件的轴向成形的装置和方法
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TWI409113B (zh) * 2009-02-11 2013-09-21 Sms Meer Gmbh 由預穿孔的空心塊製造管形工作物的方法
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CN115870442A (zh) * 2022-12-30 2023-03-31 山东宏桥新型材料有限公司 一种铝合金花键轴叉锻造成型工艺及花键轴叉

Also Published As

Publication number Publication date
DD117193A5 (https=) 1976-01-05
FR2252885A1 (https=) 1975-06-27
FR2252885B3 (https=) 1977-08-12
DE2448283A1 (de) 1975-06-05
JPS5086468A (https=) 1975-07-11
AT322329B (de) 1975-05-12

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