US3354693A - High energy rate forming machine - Google Patents

High energy rate forming machine Download PDF

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Publication number
US3354693A
US3354693A US384103A US38410364A US3354693A US 3354693 A US3354693 A US 3354693A US 384103 A US384103 A US 384103A US 38410364 A US38410364 A US 38410364A US 3354693 A US3354693 A US 3354693A
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US
United States
Prior art keywords
ram
piston
plunger
cylinder
chamber
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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
Application number
US384103A
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English (en)
Inventor
Asari Akira
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Application granted granted Critical
Publication of US3354693A publication Critical patent/US3354693A/en
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    • 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
    • B21J7/24—Drives for hammers; Transmission means therefor for power hammers operated by steam, air, or other gaseous pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • B30B1/38—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure wherein the plungers are operated by pressure of a gas, e.g. steam, air

Definitions

  • ABSTRACT OF THE DISLOSURE A high energy rate forming machine having a ram actuated by a piston which has one of its ends in a gas pressure chamber, the inner end of the piston being equipped with a plunger tightly receivable in a cylinder which is connected via a check valve to the interior of the chamber, the vacuum formed in said cylinder when said plunger is thrust thereinto holding the piston until a switching valve connects said chamber to said cylinder.
  • Hydraulic jack means entirely outside the chamber is used to raise the descended piston so that the plunger re enters the cylinder to lock the piston in its upward position.
  • the hydraulic jack may also be used to trigger the release of the piston by forcibly withdrawing the plunger from the cylinder.
  • the present invention relates to a high energy rate forming machine in which a ram is actuated at a high rate by the action of a gaseous pressure and thus actuated ram acts on various materials, especially metals, with a high energy rate forming force.
  • one metal mould is supported by a stationary platform and the other metal mould is secured to a ram which is a material or work is imparted a desired plastic deforma tion thereto by a cooperative action between the two moulds.
  • Patented Nov. 28, 196i Summary 0 the invention Therefore, the main object of the present invention to provide a high energy rate forming machine in whic the ram is actuated by means of gas pressure and th initial position of the ram is maintained by the same g2 pressure.
  • Another object of the present invention is to provide high energy rate forming machine in which when the rat is actuated by gas pressure, initially the ram slowly move along a preliminary stroke passage and thereafter initiate its proper impact stroke.
  • the ram is provide with a piston and the piston is adapted to be moved int a gas pressure chamber which has a substantially large diameter than that of the piston and seals gas under high pressure therein.
  • the ram piston is actuated at high rate by the gas pressure of the gas pressure chambe which acts on one end surface of the piston whereby high rate energy is generated by the actuation of the pie ton and such energy is utilized for plastic formation of work.
  • a mechanism Whic comprises a combination of a plunger and a cylinder i provided between the adjacent end of the piston and th above gas pressure chamber, the cylinder has a size jus sufiicient to receive the plunger.
  • the movement of the plunger from within tht cylinder to the point at which the plunger clears the cylin der is designed as the preliminary stroke and the follow ing high rate actuation of the ram piston is designed a: the proper impact stroke.
  • the ram piston is provided with an abut surface which is subjected to the pressure within the pressure chamber for prevention of actuation of the ram pistor thereby to maintain the piston in the initial position.
  • the ram is positively held in the initial position and when the rarr. is actuated,'since the ram firstly moves along the preliminary stroke passage and thereafter initiates the proper impact stroke, there is no danger in the time of actuation, and since the ram is actuated by the gas pressure in the proper impact stroke, a substantially high energy rate can be obtained, and since the gas pressure is sealed within the gas pressure chamber, there will be loss of gas pressure whereby a quite practical high energy rate forming machine can be provided.
  • FIG. 1 is a longitudinally cross-sectional view of a preferred embodiment according to the present invention.
  • FIG. 2 is a longitudinal cross-sectional view of a modified embodiment according to the present invention.
  • the ram 2 to which an upper metal mould 1 is secured faces the top end surface of a bolster 4 to which a lower metal mould 3 is secured.
  • the ram 2 is provided with a piston 5 which has a diameter of d and is vertically movable along a pair of guides 7 and 7 sup- )rted by'the-machine frame 6.
  • a gas pressure chamber is provided v on the frame 6 and the pressure chamber 8 1s a diameter substantiallylarger than that of the piston
  • the pressure chamber has gas under a high pressure aled therein.
  • the rampiston 5 upwardlyextends through e bottom wall .9 of the gas pressure chamber 8 into .e jinterior vof .the chamber 8 and .is provided at the per end with a plunger 10 whose diameter is larger an the diametend of the piston Sand is substantially naller than the diameter of the chamber 8.
  • the diamer of the piston 10. is indicated by d in FIGS. 1 and 2.
  • the plunger 10. is so constructed that the plunger just sin a cylinder .11 provided inthe upper portion of the iamberfiand having a diameter substantiallythe same a that of the plunger 10.
  • the bottom wall ,9 of the ressure ,chamberS with .which the ram piston 5 con- .cts and .the plunger 10 'with which the cylinder 11 )ntacts are respectively provided with-packiugs 12.and iforprevention of the high pressure gas from leaking it. of. the, gas pressure chamber 8.
  • the above gaspressure iamber 8 andcylinder 11 are connected to each other v means of. a.
  • the gposite ends of the jack cylinders 17 are communicated ithzfi-uidpressureconduits 20 and 21 respectively and t6 conduits .Ztland .21are controlled by a change-over 1lve,19. .
  • The'upper ends of the'jackpistons .18 upwardly (tend through the bolster 4 andface the .ram.2.
  • valve 16 opened to allowthe gas pressure withinthe pressure 1arnber-8to1fiow throughthe conduit 15' to act on the linder i11-th6f6by to push the plunger 19 down. Since 1e upper surface 'of plunger 10' is subjected to downard force at the areacorresponding to the diameter d E the piston .5, the plunger 10* descends down together 'ith .thepiston. 5- and ram 2 along the preliminary stroke assa ge L which corresponds to the length of the plunger andimme'diately after the upper surface of the plunger 0 has :cleared the lower end B of the cylinder 11, the as pressure of the pressure chamber 8 acts on the upper irface of.
  • the jack pistons 33 may be employed instead of the pressure of the gas pressure chamber -8 being introduced into the cylinder llras in the embodiment of FIG. 1.
  • the actuating mechanism is designed so as to the fulfill purpose, thatris, the, jack piston 38 ofithe jack cylinders 37 are provided with smaller diameter'rods 36 and the rods 36 extend through the ram 32;andhave heads 35 at their respective en'dsJWhen'the jackpistons 3.8 are caused to descend,.-the heads 35Lcome to contact withthe Upper surface :of therram 32 -andtheram 32 is pushed .down by'thexdownward movement of the'jack pistons 38 and initiates .the properimpact forming stroke.
  • the switching valve 16 and conduits v15' which are.necessary in-the embodiment of .FIG. lxcan be eliminated.
  • the gas pressure within the gas pressure chamber can be adjusted.
  • the gas pressure chamber 28 is filled with a certain amount of .liq-uid and the liquidamount is adjusted by the manipulation of the valves 24, 26, and accordingly, the gas pressure within the ,gas pressure chamber canbe varied. Any variation in the gaspressure may. vary. the downward movementrateof the rampiston, and accordingly, any desired high energyrate-forming efficiency can 7 be obtained.
  • a high energy rate forming-machine which comprises: ararn adapted to be actuated at a high rate by gas pressure; apiston provided on said ram;-a pressure chambenadapted'to .containgas underhigh pressure and having .a.diameter'substantiallyjlarger than the diameter of said;piston, said piston passing throughazsliding seal in one'endof said chambena plunger-cylinder assembly disposed between one end of said piston and the other end of-saidpressure chamber, said plunger beingformed integral .with said pistonand said cylinder being formed integral with said pressure chamber; and a jack device locatedentirely outside said chamber for returning said ram to its initial position after it has descended; said cylinder and saidpressure chamber communicating with each other by means of a check valve which opens only to said 'gaspressure chamber, and said cylinder and said pressure-chamber also-communicating with each other by means of a switching valve.
  • a high energy rate forming machine which comprises: a ram adapted to be actuated at a high rate by gas pressure; a-pistonprovided on said ram; a pressure chamber adapted to contain gas under high pressure and having a diametersubstantiallylargerthanthediameter of said piston, said piston passing through a sliding seal in one end of said chamber; a plunger-cylinder assembly disposed between one end of said piston and the other end of said pressure chamber, said plunger being formed integral with said piston and said cylinder formed integral with said pressure chamber; a jack device located entirely outside said chamber for returning said ram to its initial position after it has descended; said jack means actuating said piston by forcibly separating said plunger from said cylinder.
  • a high energy rate forming machine as claimed in claim 3 in which a liquid supply device is further provided, said liquid supply device being adapted to supply any desired amount of liquid into said pressure chamber so as to vary the gas pressure within said chamber, the surface of said liquid within said chamber being in direct contact with said gas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Forging (AREA)
  • Actuator (AREA)
US384103A 1963-07-24 1964-07-21 High energy rate forming machine Expired - Lifetime US3354693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3925763 1963-07-24

Publications (1)

Publication Number Publication Date
US3354693A true US3354693A (en) 1967-11-28

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ID=12548071

Family Applications (1)

Application Number Title Priority Date Filing Date
US384103A Expired - Lifetime US3354693A (en) 1963-07-24 1964-07-21 High energy rate forming machine

Country Status (5)

Country Link
US (1) US3354693A (de)
AT (1) AT250132B (de)
CH (1) CH427507A (de)
DE (1) DE1294329B (de)
GB (1) GB1078913A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425261A (en) * 1967-03-09 1969-02-04 Kobe Steel Ltd High speed returning impact forming machine
US3427856A (en) * 1966-03-14 1969-02-18 Kobe Steel Ltd High speed returning impact forming machine
US3776020A (en) * 1972-06-27 1973-12-04 I Fedosenko High-speed pressing machine
US5686652A (en) * 1996-09-09 1997-11-11 Pfund; Bruce Portable test hammer apparatus
US8904927B1 (en) * 2009-06-18 2014-12-09 Lillian C. Pendleton Pneumatic container compacting apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949096A (en) * 1957-09-13 1960-08-16 Gen Dynamics Corp Pneumatic actuator
US2997025A (en) * 1957-10-17 1961-08-22 Gen Dynamics Corp Externally triggered actuator
US3105414A (en) * 1961-12-26 1963-10-01 Gen Dynamics Corp High energy impactor apparatus
US3108503A (en) * 1960-10-31 1963-10-29 Gen Dynamics Corp High energy rate forming machine
US3135140A (en) * 1962-04-19 1964-06-02 Us Industries Inc High-energy impact machine
US3138976A (en) * 1958-12-27 1964-06-30 Schloemann Ag Hydraulic forging presses
US3158048A (en) * 1960-10-25 1964-11-24 Warner Swasey Co Impact machine
US3158046A (en) * 1959-05-20 1964-11-24 Hydraulik Gmbh Hydraulic forging press
US3194049A (en) * 1961-10-19 1965-07-13 Eumuco Ag Fur Maschb Top-pressure forging hammer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE281678C (de) *
GB875572A (en) * 1958-09-24 1961-08-23 Gen Dynamics Corp Dynamic impacting machine
US2959049A (en) * 1959-04-22 1960-11-08 John L Luttrell Shock tester
GB921910A (en) * 1960-05-02 1963-03-27 Us Industries Inc High energy, high velocity, impact machine
US3039439A (en) * 1960-06-10 1962-06-19 Gen Dynamics Corp Actuator with set force plunger
US2994302A (en) * 1960-08-04 1961-08-01 Gen Dynamics Corp Pressure release system with valve piston head
FR1296483A (fr) * 1961-08-01 1962-06-15 Gen Dynamics Corp Machine exerçant des cadences de chocs

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949096A (en) * 1957-09-13 1960-08-16 Gen Dynamics Corp Pneumatic actuator
US2997025A (en) * 1957-10-17 1961-08-22 Gen Dynamics Corp Externally triggered actuator
US3138976A (en) * 1958-12-27 1964-06-30 Schloemann Ag Hydraulic forging presses
US3158046A (en) * 1959-05-20 1964-11-24 Hydraulik Gmbh Hydraulic forging press
US3158048A (en) * 1960-10-25 1964-11-24 Warner Swasey Co Impact machine
US3108503A (en) * 1960-10-31 1963-10-29 Gen Dynamics Corp High energy rate forming machine
US3194049A (en) * 1961-10-19 1965-07-13 Eumuco Ag Fur Maschb Top-pressure forging hammer
US3105414A (en) * 1961-12-26 1963-10-01 Gen Dynamics Corp High energy impactor apparatus
US3135140A (en) * 1962-04-19 1964-06-02 Us Industries Inc High-energy impact machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3427856A (en) * 1966-03-14 1969-02-18 Kobe Steel Ltd High speed returning impact forming machine
US3425261A (en) * 1967-03-09 1969-02-04 Kobe Steel Ltd High speed returning impact forming machine
US3776020A (en) * 1972-06-27 1973-12-04 I Fedosenko High-speed pressing machine
US5686652A (en) * 1996-09-09 1997-11-11 Pfund; Bruce Portable test hammer apparatus
US8904927B1 (en) * 2009-06-18 2014-12-09 Lillian C. Pendleton Pneumatic container compacting apparatus

Also Published As

Publication number Publication date
CH427507A (de) 1966-12-31
GB1078913A (en) 1967-08-09
DE1294329B (de) 1969-05-08
AT250132B (de) 1966-10-25

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