US3791183A - Heat-extrusion method - Google Patents

Heat-extrusion method Download PDF

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Publication number
US3791183A
US3791183A US00113820A US3791183DA US3791183A US 3791183 A US3791183 A US 3791183A US 00113820 A US00113820 A US 00113820A US 3791183D A US3791183D A US 3791183DA US 3791183 A US3791183 A US 3791183A
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United States
Prior art keywords
billet
extrusion
bore
metal
chisel
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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
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US00113820A
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English (en)
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R Creuzet
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Individual
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Individual
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    • 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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • 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
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied

Definitions

  • the front surface of which is smaller than that of the billet Prior to being pressed, by means of a chisel the front surface of which is smaller than that of the billet, the latter is coated on its lateral surface, as well as on its front face, with a powdered retaining product, so that after extrusion there remains on the inner wall of the bore of the container housing the billet a skirt of metal wherebyis produced a metallic part the outer surface of which is devoid of any defects.
  • the object of the invention is a method for heatextrusion of a metal, as well as a machine to carry out this method.
  • a retaining product is present between the billet and the inner surface of the bore housing the billet, and the diameter of the ramming side of the chisel is slightly smaller than that of the bore.
  • This skirt may afterwards be easily removed.
  • the invention also provides to interpose the retaining product between the front side of the billet and the plate through which the metal is to be extruded, the
  • the piece obtained by extrusion is devoid of surface defects. It may be thin or present, in the case of a shaped piece, parts thinner than those which could be obtained with the known methods.
  • FIG. 1 is a very diagrammatic sectionnal view of a part of a machine according to the invention
  • FIG. 2 is similar to FIG. 1, for another condition
  • FIG. 3 relates to another condition.
  • the apparatus includes a holder 10, which may be mounted so that it may be displaced to allow the insertion of a billet ll of themetal to be extruded.
  • the piston 12 provided for the extrusion is removed at a distance sufficiently large from the holder so that the billet may be inserted.
  • the Schoop process referred to herein is a technique in which a spraying is performed by means of a device known as a Schoop gun.
  • the material to be sprayed is brought to a high temperature by means of an internal arc and then is sprayed under pressure.
  • the spray material thus sticks onto the sprayed surface, which in the present case, is the surface of the billet.
  • the process results in a coating of microdrops on the sprayed surface.
  • the type of blow pipe employed is a plasma blow pipe.
  • the piston proper 12 is followed by a pressing chisel 13, which may easily be replaced when necessary, and the diameter of the front side 14 of the chisel 13 is very slightly smaller than the diameter of the facing end side 15 of the billet 11' which is appreciably equal to that of the cylindrical chamber 16 of the holder 10.
  • the difference between the diameters of the chisel and of the billet is somewhat exaggerated, and the clearance between the cylindrical chamber and the billet, which in practice is of about 2 to 3 mm., is likewise exaggerated.
  • Alumina or the like covers not only the lateral side 17 of the billet, but also the hind side 15 and also the is extruded through the draw-plate 19, goes through the drawing aperture 20, and the shaped piece 22 projects at a high speed beyond the bed 21, going through its aperture 23.
  • the piston 12 goes on until its front side 14 is at a comparatively small distance, ranging about one or several centimetres, from the forward end side 24 of the draw-plate 19.
  • a heel 25 (FIG. 2), which includes a bottom 26, the thickness of which is equal to the distance between the forward end side 14 of the chisel 13, in its foremost position, and the side 24 of the drawing-plate, and a lateral wall 27 making up a cylindrical sleeve or skirt, the thickness of which isequal to half the difference between the diameter of the front side 14 of the chisel and the diameter of the outer surface of the billet 11, that is about 10/10 to 15/10 mm.
  • the holder 10 is moved away from the draw-plate 31 (FIG. 3) which abutts against the counter draw-plate 32 and this latter against the bed 33, and the shaped piece is cut off at a short distance from the front side 34 of the holder.
  • This latter together with the chisel 35 and the piston 36, being moved away from the draw-plate, a forward movement of the piston 36 and of the chisel35 expels the heel 25.
  • a new billet, covered with the retaining product, is set into place in the housing 37 of the holder, and the holder together with the piston and it's chisel is brought back to the condition shown in FIG. 1 from this condition, the forward motion of the chisel extrudes the new billet, which yields again a drawn piece the section of which corresponds to that of the draw-plate.
  • the alumina or the like interposed between the lateral surface 17 of the billet and the inner wall of the chamber 16 of the holder 10 has the effect of retaining the skin of the billet on said inner surface, the internal plasticity of the metal of the heated billet being sufficient for this metal to flow through the draw-plate and for the extruded metal to slide with respect to the outer part, which adheres, through the interposition of the powdered alumina, to the inner surface of the chamber 16, thus leaving the annular sleeve 27 of the heel.
  • the shaped piece 22 which is obtained is purely metallic, that is its surface does not include a non-metallic coating. It may be used as it is, after being cooled down as usual.
  • the method allows one to obtain shaped pieces with very thin parts, for instance with edges of about 2/10 mm., directly after being drawn.
  • the invention applies to the extrusion of steel, titanium, and other metals.
  • a process for manufacturing a metallic member from a hard class of metal such as steel, titanium and the like by means of high temperature extrusion of a hard metallic billet located in the bore of a container through a die under the effect of a dummy block whose front surface is smaller than tat of the facing billet, wherein a powder of a refractory oxide selected from the group consisting of alumina and airconia i s Schoop coated onto the peripheral lateral surface and the front and rear faces of the billet before it is placed into the bore of the container at a temperature in the range of l,300.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Powder Metallurgy (AREA)
US00113820A 1970-02-19 1971-02-09 Heat-extrusion method Expired - Lifetime US3791183A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7005988A FR2079994A5 (enrdf_load_stackoverflow) 1970-02-19 1970-02-19

Publications (1)

Publication Number Publication Date
US3791183A true US3791183A (en) 1974-02-12

Family

ID=9050946

Family Applications (1)

Application Number Title Priority Date Filing Date
US00113820A Expired - Lifetime US3791183A (en) 1970-02-19 1971-02-09 Heat-extrusion method

Country Status (8)

Country Link
US (1) US3791183A (enrdf_load_stackoverflow)
JP (1) JPS5114111B1 (enrdf_load_stackoverflow)
CA (1) CA963428A (enrdf_load_stackoverflow)
DE (1) DE2106527A1 (enrdf_load_stackoverflow)
FR (1) FR2079994A5 (enrdf_load_stackoverflow)
GB (1) GB1336633A (enrdf_load_stackoverflow)
SE (1) SE382307B (enrdf_load_stackoverflow)
SU (1) SU419011A3 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030066328A1 (en) * 2001-10-01 2003-04-10 Hideyuki Kondo Indirect extrusion method of clad material
RU2220016C1 (ru) * 2002-07-01 2003-12-27 Закрытое акционерное общество "Промышленный центр "МАТЭКС" Способ производства прессованных изделий из магниевых сплавов
US20070261458A1 (en) * 2005-11-22 2007-11-15 General Electric Company Method of forming a structural component having a nano sized/sub-micron homogeneous grain structure
CN102430694A (zh) * 2011-11-15 2012-05-02 洛阳秦汉冷锻有限公司 一种铝合金压气缸毛坯的挤压工艺
CN102909230A (zh) * 2012-10-26 2013-02-06 昆山集智成模具有限公司 一种实心型材正向挤压装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454407U (enrdf_load_stackoverflow) * 1977-09-17 1979-04-14
RU2478013C1 (ru) * 2011-11-07 2013-03-27 Открытое акционерное общество "Всероссийский институт легких сплавов" (ОАО "ВИЛС") Способ изготовления прутковой заготовки

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1128059A (en) * 1911-08-07 1915-02-09 Metals Coating Company Of America Method of plating or coating with metallic coatings.
US1128058A (en) * 1910-04-01 1915-02-09 Metals Coating Company Of America Metallic coating and process of making same.
US1133507A (en) * 1914-02-19 1915-03-30 Metals Coating Company Of America Apparatus for spraying molten metal and other fusible substances.
US2773593A (en) * 1953-02-27 1956-12-11 Chase Brass & Copper Co Methods of extruding high copper alloys
US3184945A (en) * 1962-03-29 1965-05-25 Brush Beryllium Co Method and apparatus for hot pressure forming and back extruding
US3434323A (en) * 1964-05-25 1969-03-25 Atomic Energy Authority Uk Extrusion of composite bodies

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1128058A (en) * 1910-04-01 1915-02-09 Metals Coating Company Of America Metallic coating and process of making same.
US1128059A (en) * 1911-08-07 1915-02-09 Metals Coating Company Of America Method of plating or coating with metallic coatings.
US1133507A (en) * 1914-02-19 1915-03-30 Metals Coating Company Of America Apparatus for spraying molten metal and other fusible substances.
US2773593A (en) * 1953-02-27 1956-12-11 Chase Brass & Copper Co Methods of extruding high copper alloys
US3184945A (en) * 1962-03-29 1965-05-25 Brush Beryllium Co Method and apparatus for hot pressure forming and back extruding
US3434323A (en) * 1964-05-25 1969-03-25 Atomic Energy Authority Uk Extrusion of composite bodies

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030066328A1 (en) * 2001-10-01 2003-04-10 Hideyuki Kondo Indirect extrusion method of clad material
US6865920B2 (en) * 2001-10-01 2005-03-15 Sumitomo Light Metal Industries, Ltd Indirect extrusion method of clad material
RU2220016C1 (ru) * 2002-07-01 2003-12-27 Закрытое акционерное общество "Промышленный центр "МАТЭКС" Способ производства прессованных изделий из магниевых сплавов
US20070261458A1 (en) * 2005-11-22 2007-11-15 General Electric Company Method of forming a structural component having a nano sized/sub-micron homogeneous grain structure
US7296453B1 (en) * 2005-11-22 2007-11-20 General Electric Company Method of forming a structural component having a nano sized/sub-micron homogeneous grain structure
CN102430694A (zh) * 2011-11-15 2012-05-02 洛阳秦汉冷锻有限公司 一种铝合金压气缸毛坯的挤压工艺
CN102909230A (zh) * 2012-10-26 2013-02-06 昆山集智成模具有限公司 一种实心型材正向挤压装置

Also Published As

Publication number Publication date
JPS5114111B1 (enrdf_load_stackoverflow) 1976-05-07
FR2079994A5 (enrdf_load_stackoverflow) 1971-11-12
SU419011A3 (enrdf_load_stackoverflow) 1974-03-05
GB1336633A (en) 1973-11-07
CA963428A (en) 1975-02-25
SE382307B (sv) 1976-01-26
DE2106527A1 (de) 1971-09-02

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