US3376728A - Percussion press - Google Patents

Percussion press Download PDF

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Publication number
US3376728A
US3376728A US539044A US53904466A US3376728A US 3376728 A US3376728 A US 3376728A US 539044 A US539044 A US 539044A US 53904466 A US53904466 A US 53904466A US 3376728 A US3376728 A US 3376728A
Authority
US
United States
Prior art keywords
flywheel
press
spindle
sleeve
frame
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
US539044A
Other languages
English (en)
Inventor
Nemessanyi Ladislav
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.)
CHEPOS ZAVODY CHEMICKCHO A POTRAVINARSKEHO STROJIRENSTVI
CHEPOS ZD Y CHEMICKCHO A POTRA
Original Assignee
CHEPOS ZD Y CHEMICKCHO A POTRA
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 CHEPOS ZD Y CHEMICKCHO A POTRA filed Critical CHEPOS ZD Y CHEMICKCHO A POTRA
Application granted granted Critical
Publication of US3376728A publication Critical patent/US3376728A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B30B1/18—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 screw means
    • 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
    • B30B1/18—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 screw means
    • B30B1/188—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 screw means driven by a continuously rotatable flywheel with a coupling arranged between the flywheel and the screw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y10T83/8847—Screw actuated tool support

Definitions

  • This invention relates to screw presses, and particularly to a screw press with a heavy flywheel at the upper end of the screw which builds up momentum as it turns and strikes a heavy flow on the work at the end of its travel. Presses of this type are commonly referred to as percussion presses, and are normally employed for cold forming of metallic work pieces.
  • An object of the invention is the provision of a percussion press in which the kinetic energy stored in the flywheel is more effectively utilized than in similar known presses.
  • Another object is the provision of a press which is simple in design and can be operated in a simple manner.
  • a further object is the provision of a percussion press which is safer than known presses even if its screw or spindle should fail in torsion during operation.
  • the press of the invention has a sleeve mounted on the press frame for rotation about its vertical axis in an axially fixed position.
  • the spindle of the press which is fastened to the press ram for joint movement toward and away from the press bed has a threaded portion threadedly received in the sleeve.
  • a flywheel is secured against rotation relative to the spindle and is superposed on a drive member secured to the sleeve for rotation therewith.
  • the flywheel is axially movable'on the spindle toward and away from a position of weight transmitting frictional engagement with an upwardly directed face of the drive member.
  • the flywheel may be lifted from this position by a pneumatic device which includes means for admitting a gas under pressure to a normally sealed chamber axially defined between the face of the drive member and the flywheel.
  • the drive member may be rotated about the aforementioned axis by a motor.
  • FIG. 1 shows a percussion press of the invention in front elevation
  • FIG. 2 is a fragmentary, front-elevational, and partly sectional view of the press of FIG. 1.
  • a heavy, generally A-shaped, rigid upright press frame 11 which includes a stationary press bed 12-.
  • a ram 13 is guided vertically toward and away from the bed 12, and secured against rotation by guide ribs 3 on the frame engaging corresponding grooves (not shown) in the ram 13.
  • the bed 12 and ram 13 respectively carry platens or dies 1, 2.
  • a vertical passage in the frame 11 above the ram 13 receives a sleeve 15 which is freely rotatable in the passage about its vertical axis.
  • a spindle is coaxially received in the sleeve 15.
  • the main portion 14 of the spindle 10 has steep-pitched threads which engage mating threads in the lower end portion of the sleeve 15.
  • the bottom end of the spindle is secured to the ram 13 by a thrust bearing 4.
  • the top end 18 of the spindle has axial grooves 19 which are uniformly distributed about the spindle axis.
  • the hub of a thin drive disc 21 is secured against rotation on the sleeve 15 by keys 9, and against axial displacement by a collar 6 on the sleeve and a thrust bearing 5 interposed between the drive disc 21 and the top of the press frame 11.
  • An integral collar at the lower end of the sleeve 15 received in a conforming enlargement of the vertical passage in the frame 11 prevents upward axial displacement of the sleeve 15.
  • a heavy flywheel 17 coaxially superimposed on the drive disc 21 is freely rotatable and axially slidable on a cylindrical face 16 of the sleeve 15 and has a hub portion equipped with keys 20 engaging the grooves 18 so that the flywheel rotates with the spindle 10, but the spindle is free to move axially relative to the flywheel.
  • the bottom of the flywheel 17 normally rests on a flat annular friction facing 23 on the peripheral portion of the drive disc 21 and is centrally recessed to define an annular chamber 24 with the sleeve 15 and the drive disc 21. The chamber is sealed outwardly by the friction facing 23 in the illustrated position of the press.
  • a discharge orifice 25 in the drive disc 21 which communicates with an inlet opening 26 in the press frame 11 through bores in the frame 11, the sleeve 5, the disc 21 and annular grooves 7, 8 permits air to be fed to the chamber 24 from a non-illustrated compressor or other source of compressed air.
  • a dependent cylindrical flange 22 on the peripheral portion of the disc 21 is grooved to receive multiple V- belts 27 which are also trained over the drive pulley 28 of an electric motor 29 attached to the frame 11.
  • Brakes 30, 31 mounted on the frame 11 and shown in a conventional manner may be swung into frictional engagement with the inner cylindrical face of the flange 22 and with an outer cylindrical face of the flywheel 31 respectively.
  • the friction facing in effect, is the basic element of an air-operated friction clutch which is disengaged by the pressure of the air in the chamber 24. Air is released from the chamber 24 through a peripheral gap opening between the flywheel 17 and the facing 23 and having a width determined by the relationship between the weight of the flywheel and the amount and pressure of the supplied air. Frictional contact between the flywheel 17 and the drive disc 21 is sharply reduced.
  • the ram returns to its starting position when the motor 29 is started again and the brake 30 is released while the air supply into the chamber 24 is continued.
  • the disc 21 is rotated faster than flywheel 17, and the spindle therefore threadedly moves upward in the sleeve 15.
  • the friction clutch between the flywheel 17 and the drive disc 21 is engaged, and the press is ready for the next cycle of operations.
  • the downward axial velocity of the ram 13 at a predetermined rotary operating speed of the motor 29 is determined by the deceleration rate and ultimate speed of the drive disc 21 when engaged by the brake 30.
  • the velocity of the return stroke of the ram 13 is similarly determined by the difference in angular velocity between the flywheel 17 and the sleeve 15. If the ram 13 is lifted from its lowermost position before the flywheel 17 is completely stopped -by impact of the die 2 on the die 1, the flywheel may be further slowed or braked to a standstill by the brake 31 if a fast return stroke is desired.
  • the brake 31 may also be employed to prevent acceleration of the flywheel 17 by the drag of the air layer in the chamber 24.
  • the press can be operated substantially as described above entirely without the use of brakes in an obvious manner.
  • the press may be operated in such a manner that the energy stored in the flywheel is used exclusively for shaping a work piece, and none of this energy is converted to heat by brakes. Even if the brake 31 is employed for slowing the rotation of the flywheel 17, the energy spent by braking need only be very small since the ram 13 is retracted upward whenever there is even a small difference in the rotary speeds of the sleeve 15 and the spindle 10. It is preferred to operate the press in such a manner that the flywheel 17 rotates continuously, though at varying speeds, in the same direction.
  • the weight of the flywheel 17 is transmitted to the press frame 11 mainly by the hub of the disc 21 and by the thrust bearing 5.
  • the spindle 10 is practically free of axial stresses due to the flywheel, and is relieved of radial stresses caused by centrifugal forces acting on the flywheel by the journal face 16 of the sleeve 15. Torsion failure of a spindle in a percussion press of conventional design often causes the flywheel to be thrown from the machine, and resulting serious injury to personnel and damage to buildings and machinery have been reported. If the spindle 10 of the illustrated press should break, the flywheel is safely retained in its normal position. It is therefore unnecessary to equip the press of the invention with safety guards or covers for the flywheel.
  • the motor, brakes, and non-illustrated air valves which control the operation of the press can readily be actuated by push-button switches in a conventional manner.
  • controls may be operated automatically by a timing switch, or they may be electrically interlocked in a manner well known in itself for improved speed or safety of operation. The need for an operators effort and attention may thus be reduced to any desired extent.
  • sleeve means having an axis extending in said direction and mounted on said frame for rotation about said axis in an axially fixed position;
  • said sleeve means and said flywheel having respective slidably engaged axially extending faces of circular cross section about said axis.
  • brake means for reducing the rotary speed at least of one of said sleeve means and of said flywheel.
  • said motor means including a multiple speed electric motor and motion transmitting means interposed between said motor and said drive member.
US539044A 1965-04-05 1966-03-31 Percussion press Expired - Lifetime US3376728A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS222365 1965-04-05

Publications (1)

Publication Number Publication Date
US3376728A true US3376728A (en) 1968-04-09

Family

ID=5358726

Family Applications (1)

Application Number Title Priority Date Filing Date
US539044A Expired - Lifetime US3376728A (en) 1965-04-05 1966-03-31 Percussion press

Country Status (4)

Country Link
US (1) US3376728A (de)
AT (1) AT258121B (de)
DE (1) DE1577219A1 (de)
GB (1) GB1086379A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426574A (en) * 1965-11-16 1969-02-11 Chepos Z Chemickeho A Potravin Percussion press
US3507143A (en) * 1967-08-01 1970-04-21 Otto Georg Forming machine
US3654799A (en) * 1969-03-01 1972-04-11 Becorit Grubenausbau Gmbh Press assembly
US4207763A (en) * 1978-01-12 1980-06-17 G. Siempelkamp Gmbh & Co. Screw press
US4782749A (en) * 1985-08-05 1988-11-08 Kabushiki Kaisha Mitsuishi Fukai Tekkosho Screw press with an actuator
US5373765A (en) * 1992-08-07 1994-12-20 Tsukishima Kikai Co., Ltd. Apparatus for driving two tool parts for punching, cutting and stamping
US5634387A (en) * 1994-08-18 1997-06-03 Squires; Richard D. Precision cutting assembly
US6679164B2 (en) * 2000-11-07 2004-01-20 Institute Of Technology Precision Electrical Discharge Work's Press machine
WO2004052634A1 (ja) 2002-12-11 2004-06-24 Toyokoki Co.,Ltd 往復駆動機構およびその機構を用いたプレス機械
US20070107574A1 (en) * 2004-05-27 2007-05-17 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Spindle drive support
CN115090810A (zh) * 2022-07-18 2022-09-23 西安交通大学 摩擦盘驱动滑块回程的钢丝缠绕机身离合器式螺旋压力机
US11731300B2 (en) * 2016-11-15 2023-08-22 Safeworks, Llc Belt cutter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2150726C3 (de) * 1971-10-12 1979-10-11 Novopress Gmbh Pressen Und Presswerkzeuge & Co Kg, 4000 Duesseldorf Spindelpresse
GB2314800A (en) * 1996-12-05 1998-01-14 Henry Berry & Co Ltd Component assembly machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1781038A (en) * 1927-12-21 1930-11-11 Thomson Robert Power press
US1913663A (en) * 1930-12-15 1933-06-13 Oilgear Co Percussion press
CH307425A (de) * 1951-12-12 1955-05-31 Ag L Schuler Presse.
US3044138A (en) * 1960-01-29 1962-07-17 Florida Tile Ind Inc Automatic tile press
DE1168253B (de) * 1958-10-22 1964-04-16 Pressen Und Scherenbau Erfurt Antrieb fuer Reibradspindelpressen
GB987663A (en) * 1963-02-18 1965-03-31 Hasenclever Ag Maschf Fly press

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1781038A (en) * 1927-12-21 1930-11-11 Thomson Robert Power press
US1913663A (en) * 1930-12-15 1933-06-13 Oilgear Co Percussion press
CH307425A (de) * 1951-12-12 1955-05-31 Ag L Schuler Presse.
DE1168253B (de) * 1958-10-22 1964-04-16 Pressen Und Scherenbau Erfurt Antrieb fuer Reibradspindelpressen
US3044138A (en) * 1960-01-29 1962-07-17 Florida Tile Ind Inc Automatic tile press
GB987663A (en) * 1963-02-18 1965-03-31 Hasenclever Ag Maschf Fly press

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426574A (en) * 1965-11-16 1969-02-11 Chepos Z Chemickeho A Potravin Percussion press
US3507143A (en) * 1967-08-01 1970-04-21 Otto Georg Forming machine
US3654799A (en) * 1969-03-01 1972-04-11 Becorit Grubenausbau Gmbh Press assembly
US4207763A (en) * 1978-01-12 1980-06-17 G. Siempelkamp Gmbh & Co. Screw press
US4782749A (en) * 1985-08-05 1988-11-08 Kabushiki Kaisha Mitsuishi Fukai Tekkosho Screw press with an actuator
US5373765A (en) * 1992-08-07 1994-12-20 Tsukishima Kikai Co., Ltd. Apparatus for driving two tool parts for punching, cutting and stamping
US5634387A (en) * 1994-08-18 1997-06-03 Squires; Richard D. Precision cutting assembly
US6679164B2 (en) * 2000-11-07 2004-01-20 Institute Of Technology Precision Electrical Discharge Work's Press machine
WO2004052634A1 (ja) 2002-12-11 2004-06-24 Toyokoki Co.,Ltd 往復駆動機構およびその機構を用いたプレス機械
EP1570979A1 (de) * 2002-12-11 2005-09-07 Toyokoki Co., Ltd. Hubantriebsmechanismus und diesen verwendende presse
EP1570979A4 (de) * 2002-12-11 2010-05-19 Toyokoki Co Hubantriebsmechanismus und diesen verwendende presse
US20070107574A1 (en) * 2004-05-27 2007-05-17 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Spindle drive support
US7694616B2 (en) * 2004-05-27 2010-04-13 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Spindle drive support
US11731300B2 (en) * 2016-11-15 2023-08-22 Safeworks, Llc Belt cutter
CN115090810A (zh) * 2022-07-18 2022-09-23 西安交通大学 摩擦盘驱动滑块回程的钢丝缠绕机身离合器式螺旋压力机

Also Published As

Publication number Publication date
AT258121B (de) 1967-11-10
GB1086379A (en) 1967-10-11
DE1577219A1 (de) 1970-04-09

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