US3769825A - Swaging die - Google Patents

Swaging die Download PDF

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Publication number
US3769825A
US3769825A US00270105A US3769825DA US3769825A US 3769825 A US3769825 A US 3769825A US 00270105 A US00270105 A US 00270105A US 3769825D A US3769825D A US 3769825DA US 3769825 A US3769825 A US 3769825A
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US
United States
Prior art keywords
workpiece
groove
working surface
hammers
die
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
US00270105A
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English (en)
Inventor
J Reznar
B Kralowetz
J 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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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 US3769825A publication Critical patent/US3769825A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
    • 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
    • B21J13/02—Dies or mountings therefor
    • 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

  • the cavity be substantially filled with liq uid lubricant in order to insure that the forced lubrication takes place as early in the draw as possible.
  • a method of deep drawing metallic articles from sheet material including the steps of providing a die having a top surface and a female cavity terminating at said top surface in a die radius, placing a sheet of material over said cavity, holding said sheet of material against said die top surface whereby to restrict wrinkling of said sheet during drawing, and drawing said sheet of material into said cavity with a male die punch: the improvement comprising the steps of substantially filling said cavity with a liquid lubricant prior to drawing and continuously forcing liquid lubricant out of said cavity during drawing, all liquid lubricant forced out of said cavity being forced between said material being drawn and said die radius and die top surface in a direction opposite to the flow of said material being drawn.
  • SWAGING DIE This invention relates to a swaging die for producing cylindrical stock in swaging machines which comprise only two hammers blowing one against the other, in which die the working surfaces are formed by the side faces of a groove which has the configuration of an obtuse-angled V and extends in the direction of travel of the workpiece, which is rotated about its axis, said groove having an entrance portion which tapers in the shape of a wedge to a prismatic finishing portion.
  • swaging machines which comprise four hammers which extend radially to the workpiece and are angularly spaced 90 apart and carry dies which surround the workpiece.
  • the use of this machine results in a rapid and comparatively exact operation, which involves only a low labor cost. If the workpieces are large in diameter, however, swaging machines comprising four hammers would necessarily have large dimensions and would involve a high capital expenditure. For this reason swaging machines comprising only two hammers which blow one against the other are often preferred for shaping workpieces which are large in cross-section. Whereas the output of such machine is lower, they cost much less than swaging machines which comprise four hammers.
  • the V-shaped groove which is formed in the die and has side faces serving as working faces is shaped in its entrance portion and in its finishing portion to be symmetrical to the plane which extends through the vertex of the groove and the axis of the workpiece so that the angles between that plane and the working surfaces formed by the side faces are equal.
  • the main deformation is effected only at that working surface which is the leading surface relative to the rotating workpiece, i.e., at that working surface which is engaged first by the rotating workpiece, whereas almost no deformation can be observed at the other working surface.
  • the deformation is entirely unsymmetrical with respect to the plane which extends through the vertex of the groove and the axis of the workpiece so that the core of the workpiece is weakened and the workpiece is not uniformly worked throughout its cross-section and assumes a curved shape unless it is adequately guided.
  • This object is accomplished according to the invention in that in the entrance portion the angle included by the working surface which is the leading surface rel ative to the rotating workpiece and the plane extending through the vertex of the groove and the axis of the workpiece is larger than the angle between the latter plane and the trailing working surface whereas the two angles are equal in the finishing portion, in known manner.
  • the leading working surface which is first engaged by the rotating workpiece, is somewhat set back in the direction of rotation whereas the trailing surface disposed on the outlet side is correspondingly advanced so that the deformation, specifically the critical deformation in the entrance portion, where the main reduction in diameter is effected, is shared by both working surfaces.
  • the resultant of the shaping forces at the two working surfaces thus extends approximately through the axis of the workpiece and the workpiece is well and uniformly worked through and remains straight during the swaging operation even without special guide means.
  • the working surfaces include equal angles with the plane which extends through the vertex of the groove and the axis of the workpiece.
  • the difference between the two angles will depend on the feeding speed of the workpiece, the speed of the workpiece and the included angle of the V-shaped die groove and may amount, e.g., to 3-4.
  • FIG. 1 is a sectional view taken through the axis of the workpiece and shows the dies secured to the two hammers blowing one against the other and
  • FIGS. 2 and 3 are transverse sectional views taken on lines II-II and III-III, respectively, in FIG. 1 and showing also the workpiece to be shaped.
  • the swaging machine comprises two hammers, which blow one against the other and to which the workpiece is axially fed while being rotated about its axis.
  • Identical swaging dies 1 are secured to the two hammers at their end faces.
  • the working surfaces of the dies 1 consistof the side faces of a groove which extends in the direction of travel of the workpiece and has the configuration of an obtuse-angled V. That groove comprises an entrance portion 4, which tapers in the shape of a wedge to a prismatic finishing portion 3, and an exit portion 5, which is symmetrical to the entrance portion.
  • the exit portion 5 serves as an inlet portion when the feeding direction is reversed for a so-called back-swaging operation.
  • the angle a included by the working surface 7, which is the leading working surface relative to the rotating workpiece,and the plane E extending through the vertex of the groove and the axis of the workpiece 6 is in the entrance portion larger by about 3-4 than the angle B between the plane E and the trailing working surface 8.
  • the total angle a [3 is approximately
  • the two angles a, B in the finishing portion are approximately equal.
  • a swaging die for producing cylindrical stock in a swaging machine which comprises only two hammers adapted to blow one against the other and in which a workpiece is rotated about its axis and axially fed between said hammers at the same time, each of said hammers carrying one of said dies for engaging said workpiece,
  • said die being formed with a groove having the configuration of an obtuse-angled V
  • said groove having first and second side faces, which respectively form first and second working surfaces engageable with said workpiece,
  • said groove having a prismatic finishing portion and an entrance portion which axially precedes and tapers in the shape of a wedge to said finishing portion,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US00270105A 1971-08-04 1972-07-10 Swaging die Expired - Lifetime US3769825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT680571A AT307203B (de) 1971-08-04 1971-08-04 Werkzeug zum Rundschmieden für Schmiedemaschinen mit zwei gegeneinander schlagenden Hämmern

Publications (1)

Publication Number Publication Date
US3769825A true US3769825A (en) 1973-11-06

Family

ID=3589923

Family Applications (1)

Application Number Title Priority Date Filing Date
US00270105A Expired - Lifetime US3769825A (en) 1971-08-04 1972-07-10 Swaging die

Country Status (7)

Country Link
US (1) US3769825A (enrdf_load_stackoverflow)
JP (1) JPS529420B2 (enrdf_load_stackoverflow)
AT (1) AT307203B (enrdf_load_stackoverflow)
DD (1) DD97564A5 (enrdf_load_stackoverflow)
DE (1) DE2231765C3 (enrdf_load_stackoverflow)
FR (1) FR2147980B1 (enrdf_load_stackoverflow)
GB (1) GB1349613A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10525523B2 (en) 2014-12-16 2020-01-07 GFM—GmbH Method and device for forging a workpiece in bar form

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513210A (ja) * 1974-06-27 1976-01-12 Matsushita Electric Ind Co Ltd Jikikirokusaiseisochi
JPS5619240Y2 (enrdf_load_stackoverflow) * 1975-02-21 1981-05-07
JPS547623U (enrdf_load_stackoverflow) * 1977-06-17 1979-01-18
JPS5847542Y2 (ja) * 1982-03-08 1983-10-29 シャープ株式会社 磁気記録再生装置
JP4349964B2 (ja) 2003-09-10 2009-10-21 株式会社日立ハイテクノロジーズ 小型電子銃
AT513701B1 (de) 2012-12-13 2015-06-15 Gfm Gmbh Verfahren zum Schmieden eines Werkstücks
JP6252371B2 (ja) * 2014-06-19 2017-12-27 日立金属株式会社 鍛造金型および鍛造方法
CN109663877A (zh) * 2018-12-14 2019-04-23 郑州煤机格林材料科技有限公司 一种立柱缸底锻打工艺
CN114210901A (zh) * 2021-10-26 2022-03-22 陕西钛博飞特航空制造股份有限公司 一种航空发动机用钛合金连杆体积成型专用模具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1430974A (en) * 1920-07-19 1922-10-03 Frick William Swaging machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1430974A (en) * 1920-07-19 1922-10-03 Frick William Swaging machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10525523B2 (en) 2014-12-16 2020-01-07 GFM—GmbH Method and device for forging a workpiece in bar form

Also Published As

Publication number Publication date
FR2147980B1 (enrdf_load_stackoverflow) 1975-03-07
DE2231765B2 (de) 1973-10-18
FR2147980A1 (enrdf_load_stackoverflow) 1973-03-11
AT307203B (de) 1973-05-10
DE2231765C3 (de) 1974-05-22
GB1349613A (en) 1974-04-10
JPS529420B2 (enrdf_load_stackoverflow) 1977-03-16
DE2231765A1 (de) 1973-02-15
DD97564A5 (enrdf_load_stackoverflow) 1973-05-12
JPS4825650A (enrdf_load_stackoverflow) 1973-04-03

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