US3394578A - Method and press for manufacturing tubular blanks for making containers therefrom - Google Patents

Method and press for manufacturing tubular blanks for making containers therefrom Download PDF

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Publication number
US3394578A
US3394578A US497932A US49793265A US3394578A US 3394578 A US3394578 A US 3394578A US 497932 A US497932 A US 497932A US 49793265 A US49793265 A US 49793265A US 3394578 A US3394578 A US 3394578A
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United States
Prior art keywords
cavity
piston
tubular
billet
press
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
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US497932A
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English (en)
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Biginelli Oreste
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/03—Making uncoated products by both direct and backward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/14—Making other products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/20—Making uncoated products by backward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding

Definitions

  • a first object of the invention is to produce metal tubular blanks or elements, obtained by squeezing a metal billet and, having great regularity of wall thickness and a homogeneous structure for standing up to high pressures.
  • Another object of the invention is to produce flasks or cases with a bottom whose bottom is made so as to eliminate metal impurities accumulated in the bottom mass during forming thereof.
  • Another object of the invention is to produce a press enabling the drawing of the bottom mass of a tubular element such as aflask or case.
  • FIGURE 1 is a partial sectional view showing a matrix fixed to a hydraulic press head and the press piston provided with a billet fitted on the needle of the latter.
  • FIGURE 2 shows the first stage of the process in which the piston partially penetrates into the matrix, the needle or pilot of the piston being guided,
  • FIGURE 3 shows the piston at the end of travel
  • FIGURE '4 is a sectional view of the product extracted from the press for cutting oif the end part in which metal impurities are accumulated after forming thereof,
  • FIGURE 5 is a sectional view of a tubular element having a semi-spherical bottom machined or shaped in a sound part of the tubular element
  • FIGURE 6 is a sectional view showing the terminal stages of machining or shaping of part of the bottom of a tubular element such as a flask.
  • the manufacturing process for making of tubular elements consists of squeezing of a metallic billet comprising drawing the bottom mass of the tubular element formed from the billet so as to form an external extension to the squeezed or extruded walls and bottom of the tubular element in which metal impurities will accumulate at the end of the forming operation.
  • a device for operating this process comprises, as shown in FIGURE 1, a needle piston 1 cooperating with a matrix 2 fixed on a hydraulic press head.
  • the piston has an appreciably semispherical frontal "ice surface 1 whereas the bottom of the matrix cavity has a profile appreciably identical to that of the piston.
  • a drawing chamber or tubular extension 4 is provided at the bottom of the matrix cavity and coaxially to a channel or pilot hole 3 for guiding the needle or pilot 1 of the piston.
  • annular billet 5 is placed at a suitable temperature on the pilot 1 of the press piston 1 and rests on the frontal surface 1 of the latter.
  • the piston which has a principal cross section of lesser diameter than the cavity, is thrust into the matrix cavity the pilot 1 of the piston is guided or piloted by the channel or pilot hole 3, the squeezing of the billet itself can commence.
  • the piston 1 In the manufacturing stage shown in FIGURE 3, the piston 1 is in the end of its travel, it has penetrated into the billet 5 squeezing out the walls of the tubular element 5 and the mass 5 of the bottom part of the tubular element.
  • the bottom of the cylindrical element has an appreciably semispherical profile, impurities are gathered or accumulated in the semispheric portion adjacent to the bottom of the matrix and more particularly in the extension 5 filling the tubular extension 4 of the matrix.
  • the tubular element once extracted from the press after the squeezing operation has the extension 5 cut-01f, in which the impurities are accumulated.
  • the bottom mass 5 has a perfect homogeneity and can undergo machining or shaping operations for imparting the bottom of the tubular element that has been formed, with the required profile.
  • the bottom part of the tubular element 5 has undergone a supplementary operation for forming an annular seating 6 for the terminated tubular element.
  • the bottom part 5 has a strength identical with that of the walls of the tubular element or blank and can, without inconvenience, undergo high internal pressures.
  • This process is particularly well adapted to producing drawn extruded cups of light alloy.
  • the process of the invention also enables calibrated tubular elements to be made of any length.
  • the cup is extruded out at the end of the squeezing until the required thickness of the walls desired is obtained, then, after squeezing the bottom part is cut, thus enabling a perfectly calibrated tube to be obtained.
  • a side-block 7 is placed at the bottom of the matrix cavity cooperating with a profiled piston so as to terminate the forming of the bottom part of the tubular element, 5
  • FIGURE 6 shows the piston bearing on the mass 5 of the bottom part
  • the right half of FIG- URE 6 shows the bottom profile obtained after squeezing the bottom mass of the tubular element.
  • the present process in the first elaboration stage, enables a cup of metal or other material having a semispherical profiled bottom and a homogeneous bottom mass substantially free from impurities, the cup also having an insignificant eccentricity of the walls.
  • the cup or tubular blank thus obtained can be used for two purposes:
  • a method of manufacturing a tubular blank for making a container therefrom and having one end open and an opposite end partially closed comprising, providing a metallic, annular billet, disposing the billet in a matrix cavity having a cylindrical portion having an open end and a converging portion converging toward an opposite end of the cavity, said cavity comprising a tubular extension as a continuation of said converging portion co axial with said cylindrical portion and of considerably lesser diameter and axial length than said cylindrical portion, said matrix having a pilot hole in communication with said tubular extension, squeezing the billet by applying pressure thereto while in said matrix cavity by inserting a piston in said cavity having a pilot received in said pilot hole and a major cross section of lesser diameter than said cavity cylindrical portion and developing relative movement between said matrix and said piston such that said piston applies pressure to said billet in a direction toward said converging portion, whereby said billet is squeezed in a space in said cavity between the piston and said converging portion and said tubular extension and squeezed outwardly of said cavity circumferentially of said piston,
  • a press for manufacturing tubular blanks for mak- 4O ing containers therefrom and having one end open and an opposite end partially closed comprising, a matrix having a cavity having a cylindrical portion open at one end for receiving therein a heated annular billet and a converging portion converging toward an opposite end of the cavity, said cavity comprising a tubular extension as a continuation of said converging portion coaxial with said cylindrical portion and of considerably lesser diameter and axial length than said cylindrical portion, said matrix having a pilot hole in communication with said tubular extension, a piston insertable into said cavity for squeezing a heated billet in said cavity for making a tubular blank therefrom having an open end and an opposite end partially closed, said piston having a major cross section of lesser diameter than said cylindrical portion and a pilot insertable into said pilot hole, said pilot having an axial length greater than the axial length of an annular billet received in said matrix cavity, whereby when said piston is inserted into said cavity and advanced toward said converging portion of said cavity a metallic billet in said cavity is squeezed
  • a press according to claim 3 in which said piston comprises a converging leading end insertable into said matrix cavity, and said pilot extending axially from said leading end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Metal Extraction Processes (AREA)
  • Forging (AREA)
US497932A 1965-01-30 1965-10-19 Method and press for manufacturing tubular blanks for making containers therefrom Expired - Lifetime US3394578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR3860A FR1423292A (fr) 1965-01-30 1965-01-30 Procédé de fabrication d'éléments tubulaires métalliques ou autres matières, dispositif pour la mise en oeuvre de ce procédé ou procédé similaire, et les éléments tubulaires conformes à ceux obtenus

Publications (1)

Publication Number Publication Date
US3394578A true US3394578A (en) 1968-07-30

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Application Number Title Priority Date Filing Date
US497932A Expired - Lifetime US3394578A (en) 1965-01-30 1965-10-19 Method and press for manufacturing tubular blanks for making containers therefrom

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US (1) US3394578A (US07714131-20100511-C00038.png)
BE (1) BE667491A (US07714131-20100511-C00038.png)
FR (1) FR1423292A (US07714131-20100511-C00038.png)
GB (1) GB1097154A (US07714131-20100511-C00038.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525245A (en) * 1966-04-19 1970-08-25 Chesterfield Tube Co Ltd Formation of hollow metal billets
DE2826639A1 (de) * 1978-06-19 1979-12-20 Hoesch Werke Ag Rueckwaertsfliesspressverfahren und werkzeug zur herstellung von ein- oder mehrfach stufenfoermig abgesetzten werkstuecken
WO1996016754A1 (en) * 1994-12-01 1996-06-06 Advanced Monobloc Corporation Method of necking an impact extruded metal container
US20050005665A1 (en) * 2002-02-15 2005-01-13 Furukawa-Sky Aluminum Corp. Impact extrusion molded article, an impact extrusion molding method, and an impact extrusion molding apparatus
US20120125070A1 (en) * 2009-05-19 2012-05-24 Lkr Leichtmetallkompetenzzentrum Ranshofen Gmbh Method for producing a small thin-walled tube from a magnesium alloy

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI9300258A (en) * 1993-05-17 1995-02-28 Janez Pipan Process for radial extrusion with tube wall reduction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US847635A (en) * 1906-10-01 1907-03-19 Wiland Astfalck Press for forming tubes, &c.
GB432703A (en) * 1934-04-13 1935-07-31 Schloemann Ag Improvements in the manufacture of metal tubes
US3080650A (en) * 1959-07-30 1963-03-12 Metal Res And Dev Ltd Manufacture of tubular articles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US847635A (en) * 1906-10-01 1907-03-19 Wiland Astfalck Press for forming tubes, &c.
GB432703A (en) * 1934-04-13 1935-07-31 Schloemann Ag Improvements in the manufacture of metal tubes
US3080650A (en) * 1959-07-30 1963-03-12 Metal Res And Dev Ltd Manufacture of tubular articles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525245A (en) * 1966-04-19 1970-08-25 Chesterfield Tube Co Ltd Formation of hollow metal billets
DE2826639A1 (de) * 1978-06-19 1979-12-20 Hoesch Werke Ag Rueckwaertsfliesspressverfahren und werkzeug zur herstellung von ein- oder mehrfach stufenfoermig abgesetzten werkstuecken
WO1996016754A1 (en) * 1994-12-01 1996-06-06 Advanced Monobloc Corporation Method of necking an impact extruded metal container
US5572893A (en) * 1994-12-01 1996-11-12 Goda; Mark E. Method of necking and impact extruded metal container
US20050005665A1 (en) * 2002-02-15 2005-01-13 Furukawa-Sky Aluminum Corp. Impact extrusion molded article, an impact extrusion molding method, and an impact extrusion molding apparatus
US7117704B2 (en) * 2002-02-15 2006-10-10 Furukawa-Sky Aluminum Corp. Impact extrusion molded article, and impact extrusion molding method, and an impact extrusion molding apparatus
US20120125070A1 (en) * 2009-05-19 2012-05-24 Lkr Leichtmetallkompetenzzentrum Ranshofen Gmbh Method for producing a small thin-walled tube from a magnesium alloy
US9227235B2 (en) * 2009-05-19 2016-01-05 Lkr Leichtmetallkompetenzzentrum Ranshofen Gmbh Method for producing a small thin-walled tube from a magnesium alloy

Also Published As

Publication number Publication date
GB1097154A (en) 1967-12-29
FR1423292A (fr) 1966-01-03
BE667491A (US07714131-20100511-C00038.png) 1965-11-16

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