US2792623A - Method and apparatus for forming metal blanks - Google Patents

Method and apparatus for forming metal blanks Download PDF

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Publication number
US2792623A
US2792623A US33306453A US2792623A US 2792623 A US2792623 A US 2792623A US 33306453 A US33306453 A US 33306453A US 2792623 A US2792623 A US 2792623A
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US
United States
Prior art keywords
rollers
strip
cavities
blanks
projections
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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English (en)
Inventor
Melidonis Giovanni
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.)
FABBRICA ITALIANA DI POSATERIA E OGGETTI DI METALLO IN GENERE G B IZAR
ITALIANA DI POSATERIA E OGGETT
Original Assignee
ITALIANA DI POSATERIA E OGGETT
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 ITALIANA DI POSATERIA E OGGETT filed Critical ITALIANA DI POSATERIA E OGGETT
Application granted granted Critical
Publication of US2792623A publication Critical patent/US2792623A/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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/01—Extruding metal; Impact extrusion starting from material of particular form or shape, e.g. mechanically pre-treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/02—Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/10—Methods
    • Y10T225/16—Transversely of continuously fed work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/336—Conveyor diverter for moving work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/4979—Breaking through weakened portion

Definitions

  • the present invention has the object of rendering possible the utilization of rolled material for the manufacture of hollow bodies by extrusion, by not only reducing the percentage of waste in stamping out as compared to that produced with sheet metal, but by eliminating such waste completely.
  • the aforementioned blanks are not obtained by stamping, but by deformation and subsequent breaking of the rolled material.
  • a rolled metallic material having rectangular section and width smaller than the external diameter of the hollow body to be obtained is subjected to deformation by compressing portions spaced from one another of its smaller faces symmetrically towards the axis of the rolled material while this is made to advance while being guided loosely on its two larger faces.
  • the rolled material shaped in this way is then broken in correspondence with its restricted sections resulting from that deformation.
  • the invention also concerns a device for carrying out this process.
  • Said device comprises two coupled rollers arranged to turn at the same peripheral speed and provided with peripheral grooves facing each other and of a width slightly larger than the thickness of the profiled material and of a depth larger than half the width of the profiled material; the bottom of each of these grooves is provided with projections over their entire length, which projections extend almost to the periphery of the roller.
  • Fig. 1 is a view, partly broken away, of the device in accordance with this invention.
  • Fig. 2 is a section along line A--A of Fig. 1;
  • FIG. 3 is a section along line B-B of Fig. 1;
  • Fig. 4 is a section along line C-C of Fig. 1.
  • the device is composed of a support 1, which supports two shafts 2 and 3 driven respectively by the gears 4 and 5.
  • the disc 6 and ring 9 and the respective discs 8 and 14 applied thereto have such diameters a to be tangential and are so arranged that the respective tips 21 and 22 pass in alignment in proximity to each other, when thediscs are rotated.
  • a curved member 15 provided with a groove 16, which lies in the plane of the projections 10 and of the slidable members 11.
  • One part of the end of member 15 lies farther from the point oftangency of the two discs, extending, on the side of the groove 16, with a portion 17 bowed towards the plate 1, as indicated at 17 in Fig 4.
  • a rolled flat piece of metal 18 is introduced into the jaws formed of disc 6 and the ring 9, viz. in correspondence with the peripheral cavities mentioned hereinbefore.
  • the section of said rolled piece is rectangular; its thickness is smaller than the thickness of the trapezoidal cavities 7 and smaller than the thickness of the projections 10 and its width is smaller than double the depth of said cavities 7.
  • the rolled piece 18 is therefore gripped by the tips 21 and 22 and is squeezed and shaped in correspondence with said tips and enters into the subsequent cavities of the discs where it remains with a little play, assuming the shape of a chain of hexagons connected with one another by thin webs of residual material.
  • the shaped rolled piece leaving the point of tangency of the two rollers is held adherent to the ring 9 and is made to pass into the groove 16 of the member 15. During this travel the prismatic pieces 11 are gradually displaced by the rib 12 towards the periphery of the disc and push the shaped profiled piece outwards in this Way as can be seen in Fig. 1.
  • the profiled piece After covering about half turn, the profiled piece lies completely outside the respective cavity of the ring 9 and is guided exclusively by the groove 16. Arriving at the end of said groove, it is bent laterally by action of the curved end 17 and this new deformation of the profiled piece causes it to break at its points of restriction so small roughly hexagonal prisms 23 are detached, which then fall for instance through a hole 20 provided in the plate 1 into a collector not represented in the drawing.
  • the mechanism, for extracting the shaped rolled piece from the ring 9 may be of diiferent shape, the separation of the various pieces 23 from one another may be efifected by members placed in the very disc, or the breaking'in correspondence with the restricted zones of the rolled piece may be effected by bending the shaped rolled piece in another manner; many other contrivances 'and variants are possible as will be evident to one skilled in the art, with the aid of the preceding description and without departing from the scope of the present invention.
  • a device for forming successive blanks to be used in the forming of hollow bodies therefrom comprising two rollers mounted for rotation about parallel axes, and in rolling contact with each other, each of said rollers having a circumferential groove of rectangu- 'lar axial cross-section and spaced apart, wedge-shaped projections reaching out to the periphery of the related roller'so that radially opening, trapezoidal cavities are defined between the successive projections in the groove, whereby a strip of rectangular cross-section fed between said rollers while the latter are rotated will have the edges thereof pressed together at spaced locations by said projections and the portions of the strip between the spaced locations are free to expand into said cavities to define blank forming portions connected by thin webs having their major axes parallel to said axis of rotation of the roller, a fixed curved guide extending along a portion of the periphery of one of said rollers and increasing in radial distance from the axis of rotation of said one roller in the direction of rotation of the latter, and
  • a process for forming successive blanks to be used in the forming of hollow bodies therefrom comprising continuously'rotating two rollers in rolling contact with each other and having radially opening cavities in the peripheries thereof which are circumferentially segregated by wedge-shaped peripheral portionshaving their thin outer edges extending axially, said cavities of the rollers registering at the point of tangency of the rollers, feeding a strip of rectangular cross-section between said rollers, said strip having relatively wide surfaces parallel to the plane of rotation of the rollersand rela tively narrow opposite edges connecting said surfaces and which are pressed together sequentially at spaccd'locations into thin webs by said peripheral portions between the cavities with the major axes of said webs extending normal to said surfaces of the strip, said rectangular crosssection of the strip being sufficiently small so that, after pressing together of said edges, blank forming portions between said spaced locations and connected together by said thin webs are entirely included in and only incompletely fill said cavities of the rollers thereby avoiding any waste of said strip, and bending

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
US33306453 1952-01-30 1953-01-26 Method and apparatus for forming metal blanks Expired - Lifetime US2792623A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2792623X 1952-01-30
DEF12763A DE934214C (de) 1952-01-30 1953-09-04 Walzvorrichtung zum Einkneifen von Einschnitten in Vierkantmetallstaebe

Publications (1)

Publication Number Publication Date
US2792623A true US2792623A (en) 1957-05-21

Family

ID=25973867

Family Applications (1)

Application Number Title Priority Date Filing Date
US33306453 Expired - Lifetime US2792623A (en) 1952-01-30 1953-01-26 Method and apparatus for forming metal blanks

Country Status (3)

Country Link
US (1) US2792623A (de)
CH (1) CH308948A (de)
DE (1) DE934214C (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984138A (en) * 1957-08-05 1961-05-16 American Can Co Cutoff mechanism for partially slit tubular can bodies
US3054172A (en) * 1960-11-25 1962-09-18 Jr Eugene T Turney Method of making serialized nameplates
US3066401A (en) * 1959-02-10 1962-12-04 Pechiney Prod Chimiques Sa Manufacture of splined ingots
US3396452A (en) * 1965-06-02 1968-08-13 Nippon Electric Co Method and apparatus for breaking a semiconductor wafer into elementary pieces

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US658598A (en) * 1899-11-22 1900-09-25 Frederick A Stevens Blank for hinge-joints of spectacles.
US1170676A (en) * 1911-10-30 1916-02-08 Clarence E Safford Machine for making wire staples.
US1436931A (en) * 1921-05-09 1922-11-28 Herman S Albrecht Metallic billet or bar
US1707778A (en) * 1926-01-05 1929-04-02 Colonial Trust Co Method of making metal articles
US1719446A (en) * 1927-02-25 1929-07-02 Pittsburgh Screw & Bolt Compan Metal-working machinery
US2248720A (en) * 1938-08-15 1941-07-08 Superior Tube Co Method of and apparatus for forming beaded tubular elements
US2327894A (en) * 1940-08-31 1943-08-24 Remington Arms Co Inc Ammunition
US2537464A (en) * 1948-08-31 1951-01-09 Crown Zellerbach Corp Paper roll breaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR353716A (fr) * 1904-08-25 1905-09-19 Thomas Mills Anderson Laminoir à ébaucher les écrous
GB411948A (en) * 1932-12-31 1934-06-21 David Etchells And Son Ltd Improvements in, or relating to, nut forging machines
GB633060A (en) * 1945-10-26 1949-12-12 Harry Walter Delaney Method and apparatus for manufacturing twist drills

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US658598A (en) * 1899-11-22 1900-09-25 Frederick A Stevens Blank for hinge-joints of spectacles.
US1170676A (en) * 1911-10-30 1916-02-08 Clarence E Safford Machine for making wire staples.
US1436931A (en) * 1921-05-09 1922-11-28 Herman S Albrecht Metallic billet or bar
US1707778A (en) * 1926-01-05 1929-04-02 Colonial Trust Co Method of making metal articles
US1719446A (en) * 1927-02-25 1929-07-02 Pittsburgh Screw & Bolt Compan Metal-working machinery
US2248720A (en) * 1938-08-15 1941-07-08 Superior Tube Co Method of and apparatus for forming beaded tubular elements
US2327894A (en) * 1940-08-31 1943-08-24 Remington Arms Co Inc Ammunition
US2537464A (en) * 1948-08-31 1951-01-09 Crown Zellerbach Corp Paper roll breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984138A (en) * 1957-08-05 1961-05-16 American Can Co Cutoff mechanism for partially slit tubular can bodies
US3066401A (en) * 1959-02-10 1962-12-04 Pechiney Prod Chimiques Sa Manufacture of splined ingots
US3054172A (en) * 1960-11-25 1962-09-18 Jr Eugene T Turney Method of making serialized nameplates
US3396452A (en) * 1965-06-02 1968-08-13 Nippon Electric Co Method and apparatus for breaking a semiconductor wafer into elementary pieces

Also Published As

Publication number Publication date
DE934214C (de) 1955-10-13
CH308948A (de) 1955-08-15

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