US3817069A - Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts - Google Patents

Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts Download PDF

Info

Publication number
US3817069A
US3817069A US00256882A US25688272A US3817069A US 3817069 A US3817069 A US 3817069A US 00256882 A US00256882 A US 00256882A US 25688272 A US25688272 A US 25688272A US 3817069 A US3817069 A US 3817069A
Authority
US
United States
Prior art keywords
billet
die
extrusion
ram
opening
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
US00256882A
Other languages
English (en)
Inventor
G Hauser
R Melmoth
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.)
Ford Motor Co
Original Assignee
Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Priority to US00256882A priority Critical patent/US3817069A/en
Priority to CA171,152A priority patent/CA993402A/en
Priority to GB2282473A priority patent/GB1413899A/en
Priority to DE2325664A priority patent/DE2325664A1/de
Priority to JP48057923A priority patent/JPS4949858A/ja
Application granted granted Critical
Publication of US3817069A publication Critical patent/US3817069A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21C23/007—Hydrostatic 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
    • B21C23/21—Presses specially adapted for extruding metal

Definitions

  • An extrusion die assembly and method for extruding circular billets with a relatively high length-todiameter ratio comprising an extruding die located in one end of a sealed container which is adapted to receive a hydraulic ram, the ram being actuated by a hydraulic press, means for positioning and locating a billet in proper registry with respect to the die, means for introducing fluid into the chamber around the billet as the ram is withdrawn, the billet being extruded hydrostatically through the die as the ram is subsequently advanced in the fluid chamber, the billet forcing the end of the preceding billet through the die as it is advanced toward the entrance region of the die whereby a continuous extrusion of successive billets may be achieved as each billet is subjected to hydrostatic loading, the contiguous relationship of the billets preventing hydrostatic shock due to expulsion of a billet from the die and sudden decompression of the fluid.
  • a hydrostatic pressure chamber formed in a reinforced container is advanced toward the billet so that one end of the billet is received within one end of the pressure chamber.
  • the container is moved by a hydraulic press.
  • the movable piston of the press carries a ram that centers the other end of the pressure chamber.
  • the ram and the billet are separated by a movable sealing piston.
  • the ram increases the hydrostatic pressure of the fluid which is pumped into the hydrostatic pressure chamber around the billet.
  • the adjacent end of the hydrostatic chamber becomes sealed.
  • the opposite end of the hydrostatic chamber is sealed by the hydraulic ram and movable piston.
  • the high pressure fluid in the pressure chamber is allowed to surround the die portion of the assembly thereby resisting the tendency of the die to deform radially.
  • the pressure acting on the die unlike the directacting mechanical forces of conventional extrusion mechanisms, creates hydrostatic forces on the die.
  • the pressure is created by the hydraulic plunger received slidably in the working chamber of the die container. Each time the plunger is withdrawn, upon retraction of the ram, a new billet may be inserted.
  • FIG. 1 shows a series of steps for a conventional extrusion die mechanism. Each step is identified by a separate letter A through H.
  • FIG. 2 shows in cross-section an extrusion die and die container embodying the improvements of our invention.
  • FIG. 3 is an end view of the die used in the assembly of FIG. 2 as seen from the plane of section line 33 of FIG. 2.
  • FIG. 4 is an enlarged view of a corner of a billet after it is advanced into the extrusion die.
  • FIG. 5 is a view similarto FIG. 2 although it shows the billet in a position near the entrance of the extrusion die.
  • the prior art apparatus of FIG. 1 includes a hydraulic ram 10 and an extrusion die 12.
  • Ram 10 includes a ram cylinder 14 and a ram piston 16.
  • a plunger 18 is carried by piston 16 and is received within a billet container 20. This may comprise a series of cylindrical steel sleeves, the innermost of which slidably receives plunger 18.
  • a pressure cavity 22 in the innermost steel sleeve is situated between the end of the plunger 18 and a sealing piston 24.
  • the die- 12 is advanced toward the support 26 and a billet 28 is positioned by a suitable transfer mechanism and mounting fixture in alignment with the die. This is indicated in diagram B.
  • the billet container is advanced toward the die so that the billet 28 is received within the innermost sleeve of the container until it engages the end of the sealing piston 24.
  • the positioning fixtures for the die and the billet then are withdrawn as indicated in view C of FIG.'1.
  • the ram piston 14 is advanced by pumping fluid into the ram cylinder.
  • the pressure medium passes through a spring-loaded valve in the sealing piston and surrounds the billet as the right-hand end of the billet container seals against the packing seal 30 located directly against the support 26.
  • the plunger 18 is shown after it has advanced beyond the port 32 through which fluid is pumped into the container.
  • the plunger seals off the fluid supply to the container and as the piston 16 is advanced, the pressure in the chamber 22 increases thereby extruding the billet through the die.
  • the ram is stopped before the die is fully extruded, as indicated in view F.
  • the ram then is retracted and carries the billet container with it as indicated in view G.
  • the die and the butt end of the billet remain in the position shown in view G where they may be cut off by a suitable friction cutting wheel 34.
  • the butt end of the billet and the die then are removed, as shown in view H, and a new billet is simultaneously fed into the container so that the cycle can be repeated.
  • the improvement of our invention differs from the conventional system by its continuous extrusion characteristic. It is capable of extruding a series of billets, one following the other, without the necessity for the cutting operation and without the hydrostatic shock loads due to sudden compression of the extruding fluid.
  • the extrusion die assembly of our invention includes a billet container 40 having a center pressure chamber 42.
  • a hydraulic ram 44 is received within one end of the container and is sealed by a suitable peripheral seal 46.
  • the end of the ram 44 carries a cap 48 which is adapted to engage the adjacent end of a billet 50 when the latter is loaded into the chamber 42.
  • Fluid may be admitted to the chamber 42 through a suitable supply port 52.
  • a one-way flow valve prevents reversal of fluid flow through the port 52.
  • An extrusion die 62 is received in the outlet end of the chamber 42. It is formed with an irregular periphery as shown in FIG. 3, so that spaces are formed between the inner wall of the chamber 42 and the periphery of the die 62. Fluid pressure within the chamber 42 then surrounds the die 62 causing a radially inward force acting on the die which opposes the tendancy of the die to deform in a radially outward direction as a result of the extrusion forces.
  • the recesses are identified by reference character 64.
  • the upper end of the die has formed thereon a circular cap 66 which has a tapered central opening.
  • the degree of taper may be about 7 or less.
  • the end of the billet 50 is received within the tapered opening of cap 66 and is piloted toward the extrusion die opening as the plunger 44 is advanced by the hydraulic ram not shown.
  • the cap 48 has a peripheral taper for appropriately piloting the adjacent end of the billet 50.
  • the upper end of the die 62 is slotted as shown in FIG. 4 at 70 to permit exit of fluid that is trapped between the trailing end of one billet and the leading end of the succeeding billet as the succeeding billet is advanced into the die.
  • the slots 70 communicate with axially directed passages 72 in the die which lead to the exterior of the assembly.
  • FIG. 5 we have shown the billet just prior to the extrusion operation.
  • FIG. 2 shows the billet after it has been advanced through the extrusion die upon advancing movement of the ram.
  • the extrusion forces acting on the billet are hydrostatic forces rather than mechanical forces since the fluid displaced by the ram results in movement of the billet at a rate that is greater than the rate of advancement of the ram.
  • the lower end of the billet creates a seal between the upper and lower cavities.
  • makeup fluid is added through the port 52.
  • the cap 48 makes no contact with the billet.
  • the pressure above the billet and around the die rises until the extrusion of the billet begins.
  • the butt of the preceding billet also is extruded.
  • the butt leaves the die there is little shock because the billet being extruded behind it acts as a force stabilizer.
  • the extrusion of the billet is terminated when the upper surface of the butt portion of the billet passes beyond the die slots.
  • a hydrostatic extrusion apparatus comprising a billet container having a central opening formed therein, an extrusion die in one end of said opening, a plunger adapted to be received within the other end of said opening, a ram for actuating said plunger toward said extrusion die, said opening being adapted to receive therein a billet, a sealing cap portion at the inward end of said extrusion die, said cap portion having a central opening adapted to receive one end of said billet thereby creating a fluid seal, means for introducing working fluid around said billet within said opening whereby hydrostatic extrusion forces are created on said billet as said plunger is advanced into said opening, said die having located therein the trailing end of a billet from a preceding extrusion operation as said one end of said first named billet is received within said cap portion whereby said preceding billet is extruded through said die in advance of said first named billet as said plunger is advanced, said ram carries thereon a piloting cap adapted to engage one end of said first billet, said piloting cap
  • a hydrostatic extrusion apparatus comprising a billet container having a central opening formed therein, an extrusion die in one end of said opening, a plunger adapted to be received within the other end of said opening, a ram for actuating said plunger toward said extrusion die, said opening being adapted to receive therein a billet, a sealing cap portion at the inward end of said extrusion die, said cap portion having a central opening adapted to receive one end of said billet thereby creating a fluid seal, means for introducing working fluid around said billet within said opening whereby hydrostatic extrusion forces are created on said billet as said plunger is advanced into said opening, said die having located therein the trailing end of a billet from a preceding extrusion operation as said one end of said first named billet is received within said cap portion whereby said preceding billet is extruded through said die in advance of said first named billet as said plunger is advanced, the advancing end of said first named billet and the trailing end of said preceding billet define therebetween a pressure chamber, the sealing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Toys (AREA)
US00256882A 1972-05-25 1972-05-25 Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts Expired - Lifetime US3817069A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00256882A US3817069A (en) 1972-05-25 1972-05-25 Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts
CA171,152A CA993402A (en) 1972-05-25 1973-05-08 Hydrostatic extrusion method and die assembly
GB2282473A GB1413899A (en) 1972-05-25 1973-05-14 Hydrostatic extrusion apparatus
DE2325664A DE2325664A1 (de) 1972-05-25 1973-05-21 Einrichtung zum hydrostatischen strangpressen
JP48057923A JPS4949858A (enrdf_load_html_response) 1972-05-25 1973-05-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00256882A US3817069A (en) 1972-05-25 1972-05-25 Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts

Publications (1)

Publication Number Publication Date
US3817069A true US3817069A (en) 1974-06-18

Family

ID=22973987

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256882A Expired - Lifetime US3817069A (en) 1972-05-25 1972-05-25 Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts

Country Status (5)

Country Link
US (1) US3817069A (enrdf_load_html_response)
JP (1) JPS4949858A (enrdf_load_html_response)
CA (1) CA993402A (enrdf_load_html_response)
DE (1) DE2325664A1 (enrdf_load_html_response)
GB (1) GB1413899A (enrdf_load_html_response)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946584A (en) * 1973-04-11 1976-03-30 Kobe Steel, Ltd. Hydrostatic extrusion method and apparatus
US4036043A (en) * 1974-10-18 1977-07-19 Kobe Steel Ltd. Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys
WO1994028745A1 (en) * 1993-06-11 1994-12-22 Asea Brown Boveri Ab Device for high-pressure treatment of substances
CN100506415C (zh) * 2007-03-28 2009-07-01 中北大学 一种辊轮式凹模挤压成形方法
CN103042063A (zh) * 2012-12-21 2013-04-17 烟台首钢东星结晶器有限公司 一种热挤方管凹模和冲头及小方胚结晶器方管制造方法
CN109759467A (zh) * 2019-03-11 2019-05-17 合肥工业大学 一种用于转角式静液挤压装置的坯料水平自动导向机构
WO2024227019A1 (en) * 2023-04-28 2024-10-31 The Regents Of The University Of Michigan Profiled dummy block extrusion devices, methods, and systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52156737U (enrdf_load_html_response) * 1976-05-25 1977-11-28

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879887A (en) * 1953-05-11 1959-03-31 Ici Ltd Method of extruding successive but distinct articles
US3126096A (en) * 1964-03-24 Hydrostatic extrusion system
US3380270A (en) * 1964-07-03 1968-04-30 Commissariat Energie Atomique Plugging system for extrusion containers
US3382691A (en) * 1964-07-31 1968-05-14 Atomic Energy Authority Uk Hydrostatic extrusion processes
US3434320A (en) * 1966-02-04 1969-03-25 Atomic Energy Authority Uk Hydrostatic extrusion apparatus
US3451240A (en) * 1965-10-25 1969-06-24 Commissariat Energie Atomique Methods of shaping metals under high hydrostatic pressure
US3531965A (en) * 1967-10-06 1970-10-06 Asea Ab Press stand for hydrostatic extrusion of a billet
US3677049A (en) * 1969-10-01 1972-07-18 Western Electric Co Method of and appratus for positive fluid flow extrusion
US3677050A (en) * 1969-10-01 1972-07-18 Western Electric Co Method of postive fluid flow extrusion and optimum fluid control element therefor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49161A (enrdf_load_html_response) * 1972-04-19 1974-01-05

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126096A (en) * 1964-03-24 Hydrostatic extrusion system
US2879887A (en) * 1953-05-11 1959-03-31 Ici Ltd Method of extruding successive but distinct articles
US3380270A (en) * 1964-07-03 1968-04-30 Commissariat Energie Atomique Plugging system for extrusion containers
US3382691A (en) * 1964-07-31 1968-05-14 Atomic Energy Authority Uk Hydrostatic extrusion processes
US3451240A (en) * 1965-10-25 1969-06-24 Commissariat Energie Atomique Methods of shaping metals under high hydrostatic pressure
US3434320A (en) * 1966-02-04 1969-03-25 Atomic Energy Authority Uk Hydrostatic extrusion apparatus
US3531965A (en) * 1967-10-06 1970-10-06 Asea Ab Press stand for hydrostatic extrusion of a billet
US3677049A (en) * 1969-10-01 1972-07-18 Western Electric Co Method of and appratus for positive fluid flow extrusion
US3677050A (en) * 1969-10-01 1972-07-18 Western Electric Co Method of postive fluid flow extrusion and optimum fluid control element therefor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946584A (en) * 1973-04-11 1976-03-30 Kobe Steel, Ltd. Hydrostatic extrusion method and apparatus
US4036043A (en) * 1974-10-18 1977-07-19 Kobe Steel Ltd. Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys
WO1994028745A1 (en) * 1993-06-11 1994-12-22 Asea Brown Boveri Ab Device for high-pressure treatment of substances
US5579682A (en) * 1993-06-11 1996-12-03 Asea Brown Boveri Ab Device for high-pressure treatment of substances
CN100506415C (zh) * 2007-03-28 2009-07-01 中北大学 一种辊轮式凹模挤压成形方法
CN103042063A (zh) * 2012-12-21 2013-04-17 烟台首钢东星结晶器有限公司 一种热挤方管凹模和冲头及小方胚结晶器方管制造方法
CN109759467A (zh) * 2019-03-11 2019-05-17 合肥工业大学 一种用于转角式静液挤压装置的坯料水平自动导向机构
WO2024227019A1 (en) * 2023-04-28 2024-10-31 The Regents Of The University Of Michigan Profiled dummy block extrusion devices, methods, and systems

Also Published As

Publication number Publication date
DE2325664A1 (de) 1973-12-06
JPS4949858A (enrdf_load_html_response) 1974-05-15
GB1413899A (en) 1975-11-12
CA993402A (en) 1976-07-20

Similar Documents

Publication Publication Date Title
US3487668A (en) Shaping and forming articles
US3817069A (en) Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts
US3751958A (en) Press for hydrostatic extrusion of tubes
US3884062A (en) Forming of materials
US3415088A (en) Extrusion method and apparatus
US3897531A (en) Manufacture of compressed-powder bodies
US2337804A (en) Tube-extrusion apparatus
US3950979A (en) Apparatus and method for tube extrusion
US3449935A (en) Apparatus and method of metal extrusion
US3807032A (en) Method of manufacturing tubes of compound material
US3631706A (en) Methods of and apparatus for forming an article having a tubular portion
US5613393A (en) Metal extrusion process and extrusion press
US3369384A (en) Metal extrusion
GB1023122A (en) Improvements in or relating to a method of producing dimensionally stable plastic tubular members and apparatus therefor
SU455518A3 (ru) Устройство дл изготовлени полых изделий
US3777362A (en) Method of manufacturing rods or wire of compound material
US3727444A (en) Press for hydrostatic extrusion of tubing
US3243984A (en) Extrusion press for hollow extrusions
US3369385A (en) Metal extrusion apparatus
US3702555A (en) Press for hot hydrostatic extrusion
US3382691A (en) Hydrostatic extrusion processes
US3780554A (en) Method of manufacturing extruded rods of wire from compound material
US2962164A (en) Metal extrusion
US3520164A (en) High pressure extrusion apparatus
US3702556A (en) Method of hydrostatic extrusion