US3415106A - Continuous band forging machine - Google Patents

Continuous band forging machine Download PDF

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Publication number
US3415106A
US3415106A US532474A US53247466A US3415106A US 3415106 A US3415106 A US 3415106A US 532474 A US532474 A US 532474A US 53247466 A US53247466 A US 53247466A US 3415106 A US3415106 A US 3415106A
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United States
Prior art keywords
machine
plunger
forging
piston
plungers
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
US532474A
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English (en)
Inventor
Lauener Wilhelm Friedrich
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.)
Alcan Holdings Switzerland AG
Original Assignee
Prolizenz AG
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Publication date
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Publication of US3415106A publication Critical patent/US3415106A/en
Assigned to SWISS ALUMINIUM LTD. reassignment SWISS ALUMINIUM LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PROLIZENZ AG, A CORP. OF SWITZERLAND
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/22—Drives for hammers; Transmission means therefor for power hammers
    • B21J7/34—Drives for hammers; Transmission means therefor for power hammers operating both the hammer and the anvil, so-called counter-tup

Definitions

  • the invention relates to the continuous forging of metal bands, for instance of metal bands emerging from continuous casting machines, and relates more particularly to continuous band forging machines that have synchronously oppositely oscillating forging dies.
  • Continuous band forging machines of the aforesaid type have heretofore become known which can reduce the thickness of a band in a single run that would require several passes during rolling.
  • Machines of this type permit a reduction in thickness of up to 80 percent, thus reducing a metal band to one-fifth of its original thickness in a single run through the machine.
  • two sides of the machine which carry each two eccentric drives, two plungers, and two oscillating bearings, with the necessary gaskets, roller bearings or ball bearings, and so forth, are sometimes designated in the following as pulsators.
  • FIG. 1 is a vertical sectional view of a machine in accordance with the invention; the fluid conduits, valves and pumps have been illustrated only schematically;
  • FIG. 2 is a vertical sectional view, taken on the line AA of FIG. 1;
  • FIG. 3 is a fragmentary sectional view, taken on the line BB of FIG. 1, and showing the band in the process of being forged (which band, however, had been omitted from FIG. 1).
  • FIG. 1 there is provided a machine for the continuous forging of a metal band.
  • the machine comprises two opposite synchronously oscillatable pistons 11.
  • Each piston carries near its inner end, that faces the opposite piston, a forging die 10 that is secured to the piston 11.
  • the pistons 11 are aligned symmetrically opposite each other in the interior of a cylinder 24.
  • the cylinder 24 defines a pressure chamber 14 in which there is received a pressure fluid.
  • the pressure fluid preferably at the same time acts as a lubricant.
  • Two channels 16 communicate interiorly on one side with the pressure chamber 14 and on the other side each with one plunger chamber 17 of the respective pulsator.
  • Each plunger 18 is driven from an eccentric driving mechanism 21, and with its outer end projects through an oscillating bearing member 20 into the respective plunger chamber 17
  • each plunger 18 performs a longitudi ml and a tilting oscillating motion, and the free end or head of the plunger 18 during its oscillation movement alternatively reduces and, respectively, enlarges its plunger chamber 17.
  • Each of the four plungers 18 projects diametrically through a bore 19 in the respective oscillating bearing member 26, and is driven by the aforesaid eccentric driving mechanism 21.
  • Each eccentric driving mechanism 21 is energized by a driving shaft 22 that has a fly-wheel 23.
  • the bearing members 20 are journalled for rotation, preferably in the wall of the cylinder 24.
  • Resilient means are provided for aiding in the retracting of the pistons 11 to the position of maximum spacing apart of the pistons 11.
  • This means comprises a rod 12 that is connected to the outer end of each piston 11 and projects through the cover 13 of the cylinder 24, and is slidably sealed therein.
  • Resilient means are provided, such as a disc type compression spring 15 that engages the cover 13 and a projection formed on the rod. The springs 15 urge the pistons 11 apart.
  • the retracting suction action of the pressure fluid may not suflice to pull apart the forging dies 10 with sufiicient speed.
  • the action of the springs 15 aid in this retraction movement.
  • the resilient means may be helical compression springs or pneumatic or hydraulic means, or the like.
  • Conventional means are provided (not shown), for instance grooves and keys, for guiding the pistons 11 during their oscillating strokes axially non-rotatably.
  • each plunger chamber 17 has a cylindrical portion 25 in which there is disposed a sealing ring 26.
  • the pressure of the pressurized fluid will cause the sealing ring 26 to be pressed towards the bearing member 20 and towards the inner wall of the cylindrical portion 25 of the plunger chamber 17.
  • the upper die may have abutment plates 28 and the lower die 10 may have corresponding abutment plates 29.
  • These abutment plates 28, 29 serve to limit the movement towards each other of the dies 10, and thus assure a uniform thickness of the forged metal band.
  • these abutment plates 28, 29 are adjustable on the dies 10.
  • a conduit that includes a reservoir 48, a pump 36 and in series therewith an overflow valve 40.
  • an overflow valve 37 (on the right hand side of FIG. 1).
  • the pump 36 is connected to ducts 30, 31 and 32, and the connection to the valve 37 is through ducts 33, 34, 35.
  • the ducts 31, 32, 34 and 35 are, preferably by means of bores 41 and 42, connected to the plunger chambers 17.
  • Check valves 38 and 39 are provided to relieve any over-pressure occurring in the ducts 31 and 32 that are pressurized by the pump 36.
  • a single check valve 54 may be provided in the duct 30 (as indicated in broken lines in FIG. 1).
  • the operation of the oil conduit is as follows:
  • the pump 36 will supply oil from the reservoir 48 through a filter 49, into the ducts 30, 31 and 32 delivering the oil to the plunger chambers 17 and thence to the pressure chambers 14.
  • a conventional hydraulic accumulator (shown in broken lines in FIG. 1) may be provided in advance of the check valves 38 and 39, and 54; in that event the overflow valve 40 may be dispensed with, as well as the return duct 51; yet, the overflow valve 40 and the return duct 51 may be retained for additional safety.
  • the effect of the accumulator 55 is that under normal operating conditions all the pressure liquid, such as pressure oil that is delivered from the pump 36, will be delivered into the machine; the accumulator renders it possible to use a small pump 36.
  • Ducts 52 are provided which return to the reservoir 48 oil that has leaked and been accumulated in spaces 53. During operation, such leaking oil must always be present, as the pressure oil also has a lubricating function.
  • the shaft 27 is rotated, and causes the rotation of the two shafts 22 that carry the eccentric driving mechanism 21. These, in turn, cause the opposite oscillating movements of the plungers which are oppositely arranged in each of the pulsators to the right and to the left of the 0s cillating pistons 11.
  • the oscillating plungers alternately increase and decrease the pressure of the pressure liquid, such as the pressure oil in the intercommunicating plunger chambers 17, channels 16 and pressure chambers 14 for each piston 11, causing the opposite oscillations of the two pistons 11. Due to the opposite arrangements of the plungers 18 and the single driving source provided by the shaft 27, the opposite oscillations of the pistons 11 in the cylinder 24 will be synchronous.
  • the example shown in FIG. 1 relates to a machine for the forging of a metal band that has a width of 300 mm., and an initial thickness of 20 mm., which thick ness will be reduced down to 4 mm.
  • a machine of this type is used on occasion for the forging reduction of a pre-rolled aluminum band from a thickness of 8 mm. to a thickness of 1.7 mm., which is a reduction of about five to one.
  • the stroke in this example of FIG. 1 of the plungers 18 is 130 mm.
  • the pistons 11 have a diameter of 400 mm. and are hollow and have a wall thickness of 70 mm., and are made of high quality cast iron.
  • the stroke of the pistons 11 is about 6 mm.
  • the cylinder 24 is made of a steel casting, and the oscillating bearing members 20 form a case hardened steel with brass bushings.
  • the plungers 18 and the eccentric discs are forged in one piece of steel.
  • the ducts 33 through 35 are seamless steel pipes.
  • the dies 10 are mounted on die holding jaws 43 which are mounted in the bottom sections of the pistons 11.
  • Channels 44 are provided for a cooling fluid, and holding means 45 are arranged for mounting the dies 10.
  • the metal band 46 to be forged moves from right to left in FIG. 3, as indicated by an arrow.
  • the reducing forging is carried out in steps.
  • the finished forged band is designated 47.
  • the instant invention permits the building of a compact machine that requires little space, and has excellent performance characteristics, free from involuntary stoppages over long periods of operating time.
  • the frequency of stroke oscillations of the dies 10, owing to the robust construction of the pulsators in accordance with the invention, may be chosen at a high rate, for instance 12 to 25 cycles per second, or more. Consequently, a forging machine of this type may be mounted adjacent a continuous casting machine, for instance a rotary continuous casting machine, or a belt type mold continuous casting machine.
  • the highest casting speed appears to be attainable by that of Hazelett, of about 9 meters per minute at a band thickness of from 9 mm. to 10 mm.; in this case, an oscillating stroke frequency of from 20 to 30 cycles per second would seem to be appropriate, which can easily be obtained with the instant band forging machine.
  • a piston of oval cross section may be chosen that has a large diameter of 1000 mm. and a small diameter of 500 mm., and the piston may be reinforced with radial inner ribs.
  • a machine for the forging of a continuous metal band the combination of two forging dies oscillatable oppositely towards and from each other in synchronism, operating means operable for holding, guiding and driving said dies comprising a hydraulic cylinder, two oppositely positioned pistons movably disposed in said cylinder each carrying near the inner end facing the other a forging die, motor means comprising oppositely oscillatable plungers, at least one plunger chamber defined adjacent each piston and receiving one of said plungers and communicating interiorly with a portion of said cylinder adjacent the outer end of the respective piston therein, whereby oscillating movement of each plunger is transmitted to the respective piston for oscillating the piston, and eccentric driving means in driving connection with said plungers.
  • retracting means for each piston comprising a rod mounted near said outer end to said piston and extending to the interior of said cylinder, and resilient means engaging said rod outside the piston interior and urging said piston into a position of maximum spacing from the opposite piston.
  • said resilient means comprising a spring mounted between said rod and the exterior of the cylinder wall.
  • a bearing for each plunger comprising a bearing member journalled for oscillation on the wall of said cylinder adjacent the plunger chamber about an axis disposed in a plane at right angles to the axis of said cylinder, the plunger extending diametrically through said bearing member and being slidable therein longitudinally of the plunger whereby the plunger will perform relative to the plunger chamber a longitudinal stroke and simultaneously a tilting movement, thereby oscillating said bearing member about its axis, the free forward end of the plunger projecting into the plunger chamber.
  • a sealing ring disposed in each plunger chamber surrounding the forward end of the plunger therein, the pressurized fluid pressing said sealing ring towards the .walls of the plunger chamber and towards said bearing member, for sealing them.
  • each of said dies comprising abutment means at both the entrance and the exit ends for the band to be forged, operable to limit the approach of said dies towards each other.
  • said conduit comprising ducts connecting said pump and overflow valve with said plunger chambers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
US532474A 1965-03-09 1966-03-07 Continuous band forging machine Expired - Lifetime US3415106A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH321665A CH436932A (de) 1965-03-09 1965-03-09 Maschine zum Schmieden von durchlaufendem Metallband

Publications (1)

Publication Number Publication Date
US3415106A true US3415106A (en) 1968-12-10

Family

ID=4251152

Family Applications (1)

Application Number Title Priority Date Filing Date
US532474A Expired - Lifetime US3415106A (en) 1965-03-09 1966-03-07 Continuous band forging machine

Country Status (11)

Country Link
US (1) US3415106A (fr)
AT (1) AT258676B (fr)
BR (1) BR6677409D0 (fr)
CH (1) CH436932A (fr)
DE (1) DE1552949C3 (fr)
ES (1) ES323909A1 (fr)
FR (1) FR1470931A (fr)
GB (1) GB1123454A (fr)
NL (1) NL146411B (fr)
NO (1) NO123426B (fr)
SE (1) SE332611B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921429A (en) * 1974-04-11 1975-11-25 Tadeusz Sendzimir Process and apparatus for modifying the cross section of a slab
US20080112818A1 (en) * 2005-02-06 2008-05-15 Yangdong He Auxiliary Energy-Accumulation And Flow-Enhancement Device For Hydraulic System Of Concrete Pump
US20100129250A1 (en) * 2005-02-06 2010-05-27 Yangdong He Auxiliary energy-accumulation and flow-enhancement device for hydraulic system of concrete pump
CN107661957A (zh) * 2017-09-28 2018-02-06 江苏宏程锻压机床有限公司 水库式无源一次锻打型设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1206193A (en) * 1915-11-03 1916-11-28 Ralph E Bates Pneumatic power-hammer.
US2232889A (en) * 1938-12-23 1941-02-25 Spencer Frank William High-speed forging press

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1206193A (en) * 1915-11-03 1916-11-28 Ralph E Bates Pneumatic power-hammer.
US2232889A (en) * 1938-12-23 1941-02-25 Spencer Frank William High-speed forging press

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921429A (en) * 1974-04-11 1975-11-25 Tadeusz Sendzimir Process and apparatus for modifying the cross section of a slab
US20080112818A1 (en) * 2005-02-06 2008-05-15 Yangdong He Auxiliary Energy-Accumulation And Flow-Enhancement Device For Hydraulic System Of Concrete Pump
US20100129250A1 (en) * 2005-02-06 2010-05-27 Yangdong He Auxiliary energy-accumulation and flow-enhancement device for hydraulic system of concrete pump
CN107661957A (zh) * 2017-09-28 2018-02-06 江苏宏程锻压机床有限公司 水库式无源一次锻打型设备

Also Published As

Publication number Publication date
ES323909A1 (es) 1966-12-01
NO123426B (fr) 1971-11-15
DE1552949B2 (de) 1974-05-22
SE332611B (fr) 1971-02-15
AT258676B (de) 1967-12-11
DE1552949C3 (de) 1974-12-12
BR6677409D0 (pt) 1973-05-29
NL6601913A (fr) 1966-09-12
GB1123454A (en) 1968-08-14
NL146411B (nl) 1975-07-15
FR1470931A (fr) 1967-02-24
CH436932A (de) 1967-05-31
DE1552949A1 (de) 1970-02-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SWISS ALUMINIUM LTD., CH-3965 CHIPPIS, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PROLIZENZ AG, A CORP. OF SWITZERLAND;REEL/FRAME:004137/0878

Effective date: 19810921