US3648501A - Swaging machine for swaging tubular workpieces - Google Patents

Swaging machine for swaging tubular workpieces Download PDF

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Publication number
US3648501A
US3648501A US48977A US3648501DA US3648501A US 3648501 A US3648501 A US 3648501A US 48977 A US48977 A US 48977A US 3648501D A US3648501D A US 3648501DA US 3648501 A US3648501 A US 3648501A
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US
United States
Prior art keywords
swaging
gripping head
spindle
gripping
mandrel
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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
US48977A
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English (en)
Inventor
Bruno Kralowetz
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Individual
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Individual
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Publication date
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Publication of US3648501A publication Critical patent/US3648501A/en
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Classifications

    • 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
    • B21J13/10—Manipulators
    • 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

Definitions

  • a swaging box has receivingand discharge ends and contains swaging tool means.
  • First and second gripping head beds are respectively disposed at said receiving and discharge ends of said swaging box outside thereof.
  • First and second gripping heads are respectively mounted on said first and second gripping head beds.
  • Each of said gripping heads is provided with a horizontal, rotatable, tubular spindle having an inner end which is nearer to the other gripping head, and with gripping jaws hinged to said spindle at said inner end thereof.
  • Said spindles are axially aligned and each of said gripping heads is movable on the respective bed in the axial direction of its spindle.
  • the machine comprises also an attachment for use in processing tubular workpieces.
  • This attachment comprises a bridge secured to said first bed adjacent to that end of said first gripping head which is remote from said second gripping head; two cylinder-piston motors, which are flanged to said bridge and extend parallel to said spindles and away from said first gripping head, each of said motors having a displaceable member; a yoke which connects said displaceable members and comprises a center rod, which is coaxial with said spindle of said first gripping head and has a free end adjacent to said bridge; a swaging mandrel having an actuating rod which extends through said spindle of said first gripping head; and a connector carried by said free end of said center rod and releasably connected to said free end of said center rod and releasably connected to said actuating rod, whereby said motors are operable to extend and retract said mandrel relative to said spindle of said first gripping head.
  • This invention relates to an attachment for use in processing tubular workpieces in swaging machines, which comprise gripping heads, which are disposed at opposite ends of the swaging box outside thereof and horizontally movable on a bed and comprise each a rotatable tubular spindle extending in the feeding direction, and gripping jaws hinged to said spindle at that end thereof which faces the swaging box.
  • a provision of two gripping heads at opposite ends of the swaging box may be particularly desirable in conjunction with heavy swaging machines and has the advantage that the workpiece can be fed by one gripping head to the hammers provided in the swaging box and can then be received by the other gripping head so that the workpiece is swaged throughout his length in one operation and there is no unswaged portion left between the jaws. Besides, the workpiece may be clamped in its axial direction between the two gripping heads.
  • the gripping head spindle carries the gripping jaws for the workpiece and during the swaging of a workpiece to a circular cross section imparts to the workpiece the required rotation about the workpiece axis.
  • Another known swaging machine comprises a gripping head which has a tubular sleeve, through which the actuating rod of a swaging mandrel extends, and said actuating rod is connected to the piston rod of a hydraulic cylinder-piston motor, which comprises a cylinder that is mounted in a bracket of the bed of the gripping head.
  • This swaging machine is relatively light and serves to swage rifle barrels.
  • the machine comprises only one gripping head, which has no gripping jaws, and the workpiece is supported in said machine by a holder-up, which is disposed at that end of the swaging box which is remote from the gripping box. Hydraulic pressure is applied to the holder-up.
  • the swaging mandrel is short and thin. Because it is moved relative to the workpiece opposite to the feeding direction during the swaging operation and at the end of the swaging operation extends only in the trailing end portion of the workpiece, the mandrel can be withdrawn from the workpiece without difficulty.
  • the machine cannot be used selectively with swaging mandrels differing in length and/or diameter.
  • the attachment comprises a bridge, which is adapted to be secured to one of the gripping head beds adjacent to that end of the gripping head which is remote from the swaging box, two cylinder-piston motors, which are flanged to said bridge and extend parallel to the gripping head spindle and away from the gripping head, and a yoke, which connects the displaceable members of these cylinder-piston motors and comprises a center rod, which is directed toward the bridge and coaxial with the gripping head spindle and at its free end is provided with a releasable connector adapted to be selectively connected to an actuating rod of any of several swaging mandrels which differ in length and/or diameter, said actuating rod extending in known manner through the gripping head spindle, which serves in known manner to indirectly or directly support the workpiece in the axial direction of the latter.
  • the attachment constitutes a unit which is independent of the remainder of the swaging machine and can be applied to or removed from the machine as may be required.
  • the mandrel is connected to the displaceable members of the cylinder-piston motors by the center rod and the yoke and can be displaced by means of the cylinder-piston motors, and the respective gripping head is also separately displaceable, the gripping head and mandrel have the required freedom of relative movement.
  • the releasable connector between the mandrel rod and the center rod permits of a disconnection of the mandrel from the center rod and a movement of the mandrel alone by means of the gripping head; said disconnection is possible even during the operation of the machine.
  • it is sufficient to move the gripping head toward the bridge so that the spindle of the gripping head bears directly on the bridge.
  • the mandrel When the mandrel is short and has an outside diameter that is larger than the inside diameter of the gripping head spindle, the workpiece is gripped and the mandrel is then advanced until it is adjacent to that end of the workpiece which is remote from the gripping head, whereafter the gripping head and mandrel are advanced to move the workpiece and mandrel between the hammers. Thereafter, the advance :is continued only by the gripping head whereas the mandrel is held in position. The swaged workpiece is then received by the second gripping head at the other end of the swaging box and the workpiece may be clamped between the two gripping heads if this is desired.
  • the workpiece When the mandrel is long and has an outside diameter which is smaller than the inside diameter of the gripping head spindle, the workpiece is fitted directly on the advanced mandrel, which is then disconnected from the center rod and together with the workpiece is moved between the hammers only by means with the gripping head, which together with the mandrel is then retracted as far as to the bridge, whereafter the actuating rod is reconnected to the center rod and the retraction of the mandrel is continued to remove the workpiece from the mandrel.
  • a backing sleeve which is adapted to be slidably fitted on a long swaging mandrel, which has an outside diameter that is smaller than the inside diameter of the gripping head spindle, and said backing sleeve is formed in its periphery with apertures through which the gripping jaws can extend to enter an annular groove or the like formed in the mandrel, said groove or the like being adapted to receive said gripping jaws when the mandrel is advanced as far as possible.
  • the backing sleeve is disposed between the workpiece, which has been fitted on the mandrel, and the gripping head spindle, so that the workpiece can be swaged throughout its length because that end portion of the workpiece which is disposed near the gripping head is not gripped by the gripping jaws.
  • the backing sleeve serves to transmit an axially directed force from the gripping head spindle to the workpiece and in the opposite direction.
  • the swaging mandrel can be disconnected from the center rod because the gripping jaws extend through the backing sleeve into the annular groove in the swaging mandrel and hold the latter in position.
  • FIGS. 1 and 2 are diagrammatic views showing in a side elevation and a top plan view, respectively, a portion of a swaging machine provided with the attachment.
  • FIGS. 3 to 6 illustrate the operation of the machine pro vided with a short mandrel in four different operating positions.
  • FIGS. 7 to 10 are diagrammatic views showing the machine provided with a long mandrel in four swaging positions.
  • Each gripping head comprises a tubular spindle 5, which is rotatably mounted and extends in the feeding direction. Gripping jaws 6 are hinged to that end of the spindle which is adjacent to the swaging box 1.
  • the attachment comprises a bridge 7, which is adapted to be secured to the gripping head bed 3 at that end of the gripping head which is remote from the swaging box, and two hydraulic cylinder-piston motors 8, which extend parallel to and away from the gripping head spindle 5.
  • Displaceable piston rods 9 of the motors 8 are connected by a yoke 10.
  • the yoke 10 carries a center rod 11, which is coaxial with the gripping head spindle and at its free end is provided with a releasable connector 12.
  • the center rod 11 may be connected to an actuating rod 13 of a short swaging mandrel 14 or an actuating rod 13a of a long swaging mandrel 14a.
  • the actuating rod 13 extends through the gripping head spindle 5.
  • the outside diameter of the short mandrel 14 is larger and that of the long mandrel 14a is smaller than the inside diameter of the gripping head spindle 5.
  • FIG. 5 shows the position of the machine before the introduction of a workpiece 15 for work with the short mandrel 14.
  • the gripping head 4 is retracted and the gripping jaws 6 are open.
  • the gripping head 4 and the mandrel 14 are then advanced so that the mandrel enters the workpiece and the latter moves to a position between the gripping jaws.
  • the latter are now closed so that the workpiece 15 is held in position and is supported by the gripping head spindle 5 (FIG. 4).
  • the cylinder-piston motors 8 are subsequently operated to advance the mandrel 14 to a position adjacent to that end of the workpiece which is remote from the gripping head (FIG. 5).
  • the gripping head and mandrel are then advanced until the mandrel 14 is disposed between the hammers. Now the gripping head alone advances the workpiece between the hammers over the mandrel and the swaging operation is performed (FIG. 6). The swaged workpiece is received on the other side of the swaging box by the second gripping head (not shown). The gripping jaws are then opened and the gripping head and the mandrel retracted to their initial position.
  • the long mandrel 14a is entirely retracted and the spindle 5 of the gripping head 4 engages the bridge 7.
  • a backing sleeve 16 is fitted on the mandrel 14a and provided in its periphery with apertures 17, through which the gripping jaws 6 can extend.
  • the cylinder-piston motors are now operated to advance the mandrel 14a as far as possible so that the workpiece 15a is threaded onto the mandrel.
  • the gripping jaws 6 extend through the apertures in the backing sleeve 16 into an annular groove 18 formed between the mandrel proper and its actuating rod and thus hold the mandrel in position so that the connector 12 can be released.
  • the gripping head When the mandrel has thus been disconnected from the center rod of the attachment, the gripping head now moves together with the mandrel and the workpiece 15a fitted thereon between the hammers and swaging is performed at the same time (FIG. 9). In this operation, the gripping head on the other side of the swaging box may be used as a holder-up to clamp the workpiece in an axial direction.
  • the gripping head 4 and the mandrel 14a are retracted until the gripping head spindle 5 has reengaged the bridge 7.
  • the actuating rod 13a is then connected to the center rod 11 and the cylinder-piston motors 8 are operated to retract the mandrel 140.
  • the workpiece a bears by means of the backing sleeve 16 and the gripping head spindle 5 on the bridge 7, which backs also the cylinderpiston motors 8 so that force is transmitted directly and the entire force of the cylinder-piston motors can be utilized to pull the swaged workpiece 15a from the mandrel.
  • the gripping jaws 6 must be opened to such an extent that they no longer extend into the annular groove 18 before the mandrel can be retracted.
  • a swaging machine which comprises a swaging box having receiving and discharge ends,
  • first and second gripping head beds respectively disposed at said receiving and discharge ends of said swaging box outside thereof
  • first and second gripping heads respectively mounted on said first and second gripping head beds
  • each of said gripping heads being provided with a horizontal, rotatable, tubular spindle having an inner end which is nearer to the other gripping head, and with gripping jaws hinged to said spindle at said inner end thereof,
  • said machine also comprising an attachment for use in processing tubular workpieces, which attachment comprises a bridge secured to said first bed adjacent to that end of said first gripping head which is remote from said second gripping head,
  • a yoke which connects said displaceable members and comprises a center rod, which is coaxial with said spindle of said first gripping head and has a free end adjacent to said bridge,
  • a swaging mandrel having an actuating rod which extends through said spindle of said first gripping head
  • a backing sleeve is slidably fitted on said mandrel and engages said inner end of said spindle of said first gripping head and in its periphery is formed with apertures,
  • said mandrel is formed with an annular groove arranged to be in register with said apertures when said mandrel has been extended out of said spindle of said first gripping head as far as possible, and
  • said gripping jaws are adapted to extend through said apertures into said recess when the latter is in register with said apertures.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US48977A 1969-07-02 1970-06-24 Swaging machine for swaging tubular workpieces Expired - Lifetime US3648501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT631269A AT289514B (de) 1969-07-02 1969-07-02 Zusatzvorrichtung zum Bearbeiten rohrförmiger Werkstücke in Schmiedemaschinen

Publications (1)

Publication Number Publication Date
US3648501A true US3648501A (en) 1972-03-14

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ID=3585035

Family Applications (1)

Application Number Title Priority Date Filing Date
US48977A Expired - Lifetime US3648501A (en) 1969-07-02 1970-06-24 Swaging machine for swaging tubular workpieces

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US (1) US3648501A (enrdf_load_stackoverflow)
JP (1) JPS4817705B1 (enrdf_load_stackoverflow)
AT (1) AT289514B (enrdf_load_stackoverflow)
DE (1) DE2030472A1 (enrdf_load_stackoverflow)
FR (1) FR2050439B1 (enrdf_load_stackoverflow)
GB (1) GB1259590A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385466A1 (fr) * 1977-04-01 1978-10-27 Gfm Fertigungstechnik Machine a forger de gros tubes sur un mandrin long
US20040149000A1 (en) * 2003-02-04 2004-08-05 Stupecky Josef J. Swaging machine and method of use
US20040154210A1 (en) * 2003-02-10 2004-08-12 Bennett Ronald B. Gun chambering device
US20070186604A1 (en) * 2003-12-30 2007-08-16 Robert Koppensteiner Method and apparatus for producing a cylindriacal hollow body from a blank
CN101797624A (zh) * 2009-02-11 2010-08-11 Sms米尔股份有限公司 用于由预先穿孔的空心坯料制造管形工件的方法和装置
US9833600B2 (en) 2005-12-16 2017-12-05 Interface Associates, Inc. Methods for manufacturing multi-layer balloons for medical applications

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2248182C2 (de) * 1972-09-30 1984-04-05 Mannesmann AG, 4000 Düsseldorf Freiform-Schmiedepressenanlage
JPS63215889A (ja) * 1987-03-03 1988-09-08 Kayaba Ind Co Ltd ギヤポンプ
US4860568A (en) * 1987-07-27 1989-08-29 Furukawa Aluminum Co., Ltd. Tubular material drawing apparatus for manufacturing precision tube

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1928741A (en) * 1930-05-20 1933-10-03 Tschulenk Leopold Rolling mill of the pilgrim-step type for the manufacture of metallic tubes
US2024514A (en) * 1933-03-25 1935-12-17 Diescher Tube Mills Inc Method and apparatus for making tubes
US2247863A (en) * 1939-05-27 1941-07-01 Smith Corp A O Pipe swaging machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1928741A (en) * 1930-05-20 1933-10-03 Tschulenk Leopold Rolling mill of the pilgrim-step type for the manufacture of metallic tubes
US2024514A (en) * 1933-03-25 1935-12-17 Diescher Tube Mills Inc Method and apparatus for making tubes
US2247863A (en) * 1939-05-27 1941-07-01 Smith Corp A O Pipe swaging machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385466A1 (fr) * 1977-04-01 1978-10-27 Gfm Fertigungstechnik Machine a forger de gros tubes sur un mandrin long
US20040149000A1 (en) * 2003-02-04 2004-08-05 Stupecky Josef J. Swaging machine and method of use
US7010953B2 (en) * 2003-02-04 2006-03-14 Interface Associates, Inc. Swaging machine and method of use
US20040154210A1 (en) * 2003-02-10 2004-08-12 Bennett Ronald B. Gun chambering device
US6826865B2 (en) * 2003-02-10 2004-12-07 Clymer Manufacturing Co. Gun chambering device
US20070186604A1 (en) * 2003-12-30 2007-08-16 Robert Koppensteiner Method and apparatus for producing a cylindriacal hollow body from a blank
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
US9833600B2 (en) 2005-12-16 2017-12-05 Interface Associates, Inc. Methods for manufacturing multi-layer balloons for medical applications
US10835720B2 (en) 2005-12-16 2020-11-17 Confluent Medical Technologies, Inc. Methods for manufacturing multi-layer balloons for medical applications
US11311702B2 (en) 2005-12-16 2022-04-26 Confluent Medical Technologies, Inc. Methods for manufacturing multi-layer balloons for medical applications
CN101797624A (zh) * 2009-02-11 2010-08-11 Sms米尔股份有限公司 用于由预先穿孔的空心坯料制造管形工件的方法和装置
CN101797624B (zh) * 2009-02-11 2012-10-10 Sms米尔股份有限公司 用于由预先穿孔的空心坯料制造管形工件的方法和装置

Also Published As

Publication number Publication date
JPS4817705B1 (enrdf_load_stackoverflow) 1973-05-31
FR2050439B1 (enrdf_load_stackoverflow) 1973-08-10
FR2050439A1 (enrdf_load_stackoverflow) 1971-04-02
DE2030472A1 (de) 1971-01-14
GB1259590A (enrdf_load_stackoverflow) 1972-01-05
AT289514B (de) 1971-04-26

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