US3531965A - Press stand for hydrostatic extrusion of a billet - Google Patents

Press stand for hydrostatic extrusion of a billet Download PDF

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Publication number
US3531965A
US3531965A US763793A US3531965DA US3531965A US 3531965 A US3531965 A US 3531965A US 763793 A US763793 A US 763793A US 3531965D A US3531965D A US 3531965DA US 3531965 A US3531965 A US 3531965A
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US
United States
Prior art keywords
billet
die
pressure
piston
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
Application number
US763793A
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English (en)
Inventor
Jan Nilsson
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3531965A publication Critical patent/US3531965A/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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/007—Hydrostatic extrusion

Definitions

  • a press for hydrostatic extrusion has a stand on which a die is mounted.
  • a pressure chamber containing pressure fluid is mounted on the stand for movement towards and away from the die.
  • a billet holder composed of a piston having a spring-pressed one-way valve therein is mounted for movement in the pressure chamber, the side facing the die being shaped to center the end of a billet held between it and the die.
  • the pressure chamber is withdrawn from the die and a billet is positioned between it and the die by inserting mechanism.
  • the pressure chamber is then advanced to engage over the rear end of the billet and the billet holder is moved forwards until it holds the billet between itself and the die.
  • a piston is then forced into the rear end of the pressure cylinder to extrude the billet, the pressure fluid passing through the valve in the billet holder after its pressure becomes great enough to overcome the resistance of the spring so that the fluid can press directly on the billet.
  • the present invention relates to a press, preferably horizontal, for hydrostatic extrusion of a billet enclosed in a high pressure chamber.
  • these presses have two high pressure chambers movable against each other and a common piston means movable in both the chambers and a pressure medium connection between the two chambers arranged inside the movable piston member.
  • the press stand is then long and thus has poor stability.
  • the channel in the piston means is an undesirable weakening of this.
  • the press comprises a liquid-filled high pressure chamber, a die having at least one extrusion opening, a piston which, when pushed into the pressure chamber, generates the necessary hydrostatic ice pressure to extrude a bilet inserted in the chamber, and a billet holder to hold the billet against the die before the start of the extrusion process.
  • the billet holder consists of a movable piston dividing the pressure chamber into two spaces, which piston on the side facing the billet is shaped to centre and clamp the billet and which has at least one overflow valve which, at a certain pressure difference between the sides of the piston, permits liquid to flow from the space between the pressure-generating piston and the billet holder to the space between the billet holder and the die.
  • the side of the billet holder facing the billet is suitably shaped as a cone.
  • the high pressure chamber of the press is arranged for axial displacement away from a press table acting as support for the die.
  • the press may also include an inserting mechanism for the billet which inserts a billet between the pressure chamber and the die and keeps the billet in position while the pressure chamber is moved over the billet until the billet holder arranged in the pressure chamber, by exerting a pressure on the billet, fixes this against the die.
  • an inserting mechanism for the billet which inserts a billet between the pressure chamber and the die and keeps the billet in position while the pressure chamber is moved over the billet until the billet holder arranged in the pressure chamber, by exerting a pressure on the billet, fixes this against the die.
  • a space is arranged through which pressure medium can be introduced in the pressure chamber so that the billet holder is displaced towards the billet and holds it by pressing it against the die.
  • a press is obtained for hydrostatic extrusion which can be used for large scale production. It is short in construction and can with advantage be provided with automatically operating insert ing mechanisms of simple types for inserting the billets.
  • FIG. 1 shows a section through a billet holder and the adjacent part of the high pressure chamber.
  • FIGS. 2-8 show longitudinal sections through a press showing the positions of the parts in relation to each other at different moments during a working cycle.
  • FIG. 9 shows a section taken along the line A-A in FIG. 2.
  • FIG. 1 designates a billet holder freely movable in axial direction in the pressure cylinder 2 of a high pressure chamber and dividing the pressure chamber into two spaces 3 and 4.
  • a pressure-generating piston 5 is inserted into the space 3 and the billet 6 is in the space 4.
  • the billet holder 1 is shaped as a piston with a seal 7 and a conical end surface 8 on its side facing the space 4. It is provided with overflow channels 9 and 10, a valve 11 with a valve cone 12 influenced by a spring 13 and an overflow channel 14 which prevents the pressure between the cone 8 and a billet 6 from exceeding the pressure in the space 4.
  • the high pressure cylinder 2 is horizontally arranged in a press stand having a vertical press table 15 and an end piece 16 which is held together by four set bolts 17.
  • the press table 15 has a support 18 for a press die 19.
  • An operating cylinder 20 is arranged in the end piece 16 with a diflerential piston 21 to operate the pressuregenerating piston 5.
  • 50 designates a lid for the cylinder 20.
  • the spaces 23 and 24 on either side of the piston 21 are in communication with a pressurized oil source, not shown, by means of conduits 25 and 26.
  • An operating cylinder 22 is also arranged in the end piece 16 to operate the high pressure cylinder 2.
  • the operating cylinders comprise a piston 27 which, with the rod 28, is joined to the high-pressure chamber 2.
  • the spaces 29 and 30 on either side of the piston 27 are in connection with a pressurized oil source, not shown, by means of conduits 31 and 32.
  • the high pressure cylinder 2 is suspended in two brackets 33 supported by two axially slidable sleeves 34 arranged on the upper bolts 17.
  • a seal 35 which seals between the cylinder 2 and the die 19.
  • two seals 36 and 37 which seal against the pressure-generating piston 5.
  • an annular space 38 which is in communication with a pressure medium source through the conduit 39.
  • the seal 37 is with advantage arranged in a separate sleeve which at its connection to the high pressure cylinder 2 forms the annular space 38.
  • This consists of a gripping means 40 which, through the piston rod 41, is connected to the piston 42 in the operating cylinder 43.
  • the spaces 44 and 45 on either side of the piston 42 are in communication with operating valves and a pressurized oil source, not shown, by means of the conduits 46 and 47.
  • 48 is an extruded product, 49 the remnants of a billet; and 51 a cross-cutting saw.
  • FIG. 2 the piston and cylinder 2 are in their left-hand end positions and a billet 6 and die 19 held, in the holder 40 in the insertion mechanism 59, have been moved by theoperating piston 42 to a position opposite the space 4 in the cylinder 2.
  • the cylinder 2 is displaced by the operating cylinders 22 to the right to the position shown in FIG. 3.
  • the billet 6 is partly inside the space 4 in the cylinder 2 and the piston 5 is in such a position in relation to the cylinder that sealing is obtained between the piston 5 and the cylinder 2 by the Sealing ring 37 and there is a free passage for the introduction of pressure medium into the space 3 through the conduit 39 and the annular space 38.
  • the cylinder 2 is held in this position and pressure medium is supplied to the space 3.
  • the billet holder 1 is displaced to the right and its conical surface 8 gradually comes into contact with the billet 6 and presses this against the die 19 and the die against the support 18 on the press table with a force which is limited by the opening pressure of the valve 11.
  • FIG. 5 shows the position at the end of the extrusion.
  • the piston 5 and cylinder 2 are now moved simultaneously back to their left-hand end positions and the die 19 with the remnants of a billet is displaced somewhat to the left by means not shown.
  • the position according to FIG. 8 has now been obtained.
  • a cross-cutting saw 51 is now moved forward and cuts the rod 48 close to the die 19.
  • the remnants of the billet 49 are removed from the die 19 after which the die and a new billet are inserted into the inserting mechanism 59 and a new operating cycle can be started.
  • Press for hydrostatic extrusion comprising a press stand, a cylindrical high pressure chamber mounted on said stand and filled with liquid, a die mounted on said stand and having at least one extrusion opening, a piston which, when pushed into the pressure chamber, generates the necessary hydrostatic pressure to extrude a billet inserted in the chamber, and a billet holder, in which the billet holder comprises a second movable piston dividing the pressure chamber into two spaces, which second piston on the side facing the billet is shaped to center and clamp the billet and which has at least one overflow valve which, at a certain pressure difference between the sides of the second piston, permits liquid to flow from the space between the pressure-generating piston and the billet holder to the space between the billet holder and the die.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Extrusion Of Metal (AREA)
US763793A 1967-10-06 1968-09-30 Press stand for hydrostatic extrusion of a billet Expired - Lifetime US3531965A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13689/67A SE320948B (de) 1967-10-06 1967-10-06

Publications (1)

Publication Number Publication Date
US3531965A true US3531965A (en) 1970-10-06

Family

ID=20297826

Family Applications (1)

Application Number Title Priority Date Filing Date
US763793A Expired - Lifetime US3531965A (en) 1967-10-06 1968-09-30 Press stand for hydrostatic extrusion of a billet

Country Status (12)

Country Link
US (1) US3531965A (de)
AT (1) AT285292B (de)
BE (1) BE721642A (de)
CH (1) CH471676A (de)
DK (1) DK131135B (de)
FI (1) FI52529C (de)
FR (1) FR1603623A (de)
GB (1) GB1234286A (de)
IE (1) IE32409B1 (de)
NL (1) NL156070B (de)
NO (1) NO130147B (de)
SE (1) SE320948B (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698220A (en) * 1970-05-26 1972-10-17 Asea Ab Press for hot hydrostatic extrusion
US3702555A (en) * 1971-02-25 1972-11-14 Asea Ab Press for hot hydrostatic extrusion
US3702556A (en) * 1970-04-30 1972-11-14 Asea Ab Method of hydrostatic extrusion
US3709014A (en) * 1970-04-30 1973-01-09 Asea Ab Press for hydrostatic extrusion
US3722245A (en) * 1971-05-18 1973-03-27 Kobe Steel Ltd Hydrostatically operated extruding machine
US3727444A (en) * 1971-03-15 1973-04-17 Asea Ab Press for hydrostatic extrusion of tubing
US3747383A (en) * 1971-03-12 1973-07-24 Asea Ab Press for hydrostatic extrusion of long billets
US3817069A (en) * 1972-05-25 1974-06-18 Ford Motor Co Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts
US3893320A (en) * 1973-10-12 1975-07-08 Asea Ab Extrusion press for hydrostatic extrusion with a billet-holding piston in the pressure chamber
US3969916A (en) * 1974-06-10 1976-07-20 Ab Carbox Isostatic press
US4023390A (en) * 1973-09-19 1977-05-17 Kobe Steel Ltd. Machine for use in hydrostatic extrusion
US4078408A (en) * 1975-10-23 1978-03-14 Asea Aktiebolag Method of hydrostatic extrusion for holding a billet during insertion into a pressure chamber
US4083214A (en) * 1974-11-07 1978-04-11 Kobe Steel, Ltd. Hydrostatic extrusion method
US4112723A (en) * 1974-11-07 1978-09-12 Kobe Steel, Ltd. Hydrostatic extrusion apparatus
US4305270A (en) * 1979-11-13 1981-12-15 Kokovikhin Evgeny A Hydrostatic pressing apparatus
AT403531B (de) * 1994-08-10 1998-03-25 Chemiefaser Lenzing Ag Vorrichtung zum regeln des druckes in einer strömenden, viskosen masse
US20150068266A1 (en) * 2013-09-10 2015-03-12 Manchester Copper Products, Llc Positive stop systems and methods for extrusion press
CN105268754A (zh) * 2015-11-17 2016-01-27 无锡市威特机械有限公司 一种挤压机上用限位杆装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104289544B (zh) * 2014-10-11 2016-04-27 昆山名威精密工业有限公司 一种超长型推杆挂台加热挤压装置
CN108787774A (zh) * 2018-03-23 2018-11-13 中国重型机械研究院股份公司 一种钢丝缠绕式的静液挤压机及挤压方法
CN109332412A (zh) * 2018-11-21 2019-02-15 中国重型机械研究院股份公司 一种金属静液挤压机超超高压的充液结构
CN109304381B (zh) * 2018-11-21 2021-03-16 中国重型机械研究院股份公司 一种金属静液挤压机挤出制品缓冲装置
CN109304378A (zh) * 2018-11-21 2019-02-05 中国重型机械研究院股份公司 一种1800MPa静液压力的装置
CN112548047A (zh) * 2020-11-04 2021-03-26 青岛新东机械有限公司 一种全自动单工位造型机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558035A (en) * 1947-07-05 1951-06-26 Percy W Bridgman Method and apparatus for cold drawing
US3364716A (en) * 1965-07-07 1968-01-23 Fielding & Platt Ltd Extrusion apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558035A (en) * 1947-07-05 1951-06-26 Percy W Bridgman Method and apparatus for cold drawing
US3364716A (en) * 1965-07-07 1968-01-23 Fielding & Platt Ltd Extrusion apparatus

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702556A (en) * 1970-04-30 1972-11-14 Asea Ab Method of hydrostatic extrusion
US3709014A (en) * 1970-04-30 1973-01-09 Asea Ab Press for hydrostatic extrusion
US3698220A (en) * 1970-05-26 1972-10-17 Asea Ab Press for hot hydrostatic extrusion
US3702555A (en) * 1971-02-25 1972-11-14 Asea Ab Press for hot hydrostatic extrusion
US3747383A (en) * 1971-03-12 1973-07-24 Asea Ab Press for hydrostatic extrusion of long billets
US3727444A (en) * 1971-03-15 1973-04-17 Asea Ab Press for hydrostatic extrusion of tubing
US3722245A (en) * 1971-05-18 1973-03-27 Kobe Steel Ltd Hydrostatically operated extruding machine
US3817069A (en) * 1972-05-25 1974-06-18 Ford Motor Co Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts
US4023390A (en) * 1973-09-19 1977-05-17 Kobe Steel Ltd. Machine for use in hydrostatic extrusion
US3893320A (en) * 1973-10-12 1975-07-08 Asea Ab Extrusion press for hydrostatic extrusion with a billet-holding piston in the pressure chamber
US3969916A (en) * 1974-06-10 1976-07-20 Ab Carbox Isostatic press
US4083214A (en) * 1974-11-07 1978-04-11 Kobe Steel, Ltd. Hydrostatic extrusion method
US4112723A (en) * 1974-11-07 1978-09-12 Kobe Steel, Ltd. Hydrostatic extrusion apparatus
US4078408A (en) * 1975-10-23 1978-03-14 Asea Aktiebolag Method of hydrostatic extrusion for holding a billet during insertion into a pressure chamber
US4305270A (en) * 1979-11-13 1981-12-15 Kokovikhin Evgeny A Hydrostatic pressing apparatus
AT403531B (de) * 1994-08-10 1998-03-25 Chemiefaser Lenzing Ag Vorrichtung zum regeln des druckes in einer strömenden, viskosen masse
US20150068266A1 (en) * 2013-09-10 2015-03-12 Manchester Copper Products, Llc Positive stop systems and methods for extrusion press
CN105268754A (zh) * 2015-11-17 2016-01-27 无锡市威特机械有限公司 一种挤压机上用限位杆装置

Also Published As

Publication number Publication date
BE721642A (de) 1969-03-03
CH471676A (de) 1969-04-30
DE1800514A1 (de) 1969-06-26
IE32409B1 (en) 1973-07-25
FR1603623A (de) 1971-05-10
GB1234286A (de) 1971-06-03
IE32409L (en) 1969-04-06
DE1800514B2 (de) 1976-01-22
AT285292B (de) 1970-10-27
DK131135C (de) 1975-11-03
SE320948B (de) 1970-02-23
NL156070B (nl) 1978-03-15
NL6814271A (de) 1969-04-09
FI52529C (fi) 1977-10-10
NO130147B (de) 1974-07-15
FI52529B (de) 1977-06-30
DK131135B (da) 1975-06-02

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