US2857768A - Driving and control device - Google Patents

Driving and control device Download PDF

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Publication number
US2857768A
US2857768A US504921A US50492155A US2857768A US 2857768 A US2857768 A US 2857768A US 504921 A US504921 A US 504921A US 50492155 A US50492155 A US 50492155A US 2857768 A US2857768 A US 2857768A
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US
United States
Prior art keywords
driving
ram
control device
eccentric
shaft
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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
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US504921A
Inventor
Rall Felix
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.)
Giesserei & Maschinenfabrik Os
Giesserei & Maschinenfabrik Osterwalder AG
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Giesserei & Maschinenfabrik Os
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H21/00—Gearings comprising primarily only links or levers, with or without slides
    • F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
    • F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
    • F16H21/18—Crank gearings; Eccentric gearings
    • F16H21/22—Crank gearings; Eccentric gearings with one connecting-rod and one guided slide to each crank or eccentric
    • F16H21/32—Crank gearings; Eccentric gearings with one connecting-rod and one guided slide to each crank or eccentric with additional members comprising only pivoted links or arms
    • 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
    • B30B1/10—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 toggle mechanism
    • B30B1/106—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 toggle mechanism operated by another toggle mechanism
    • 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
    • B30B1/10—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 toggle mechanism
    • B30B1/14—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 toggle mechanism operated by cams, eccentrics, or cranks
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18176—Crank, pitman, lever, and slide

Definitions

  • the present invention relates to a driving and control device in machines for the chipless deformation of workpieces, and more particularly for toggle presses.
  • a further object of the present invention is the provision of such a driving and control device which is particularly adapted for use in combination with the reciprocating ram of a toggle press or the like.
  • a still further object of the invention is the provision of a driving and control device in connection with the reciprocating ram of a toggle press, which permits variation of the time slope of motion and the time slope of the pressure applied to said ram.
  • the driving and control device comprises a ram which is supported for longitudinal movement and is hingedly in operative connection with a member movable under the influence of two superposed reciprocating components of motion one of which in its time slope is variable with respect to the other component.
  • Fig. l is a longitudinal section through a driving and control device for a toggle press
  • Figs. 2 to 4 are diagrammatic views of the device in various positions of the ram.
  • Fig. 5 is a view showing the slidably mounted gear and its position with the other gears.
  • FIG. 1 shows the construction of the driving and control device.
  • a ram 1 supported for longitudinal movement is hingedly linked by means of a ram rod 2 with a toggle joint plate 3 which is pivotally mounted on a stationary abutment 4.
  • a link 5 is in hinged connection with the plate 3 at one end, while at the other end it is rotatably mounted on the pivot 6 of a connecting rod 7.
  • the rod 7 is connected with a crank pin 8 of a rotatably supported crankshaft 9 on which a gear 10 is firmly mounted.
  • An additional connecting rod 11, which is rotatably supported on an eccentric 12, is linked to the pivot 6 of the connecting rod 7.
  • the eccentric 12 is positively interconnected for rotation with a shaft 13, a gear 14 meshing with the gear 10 and provided with the same number of teeth being slidably mounted on the shaft 13.
  • the gear 14, moreover, meshes with a gear 15 which is splined to the rotor shaft 16 of an electromotor 17.
  • the ram 1 carries out its forward movement or its operative stroke according to the direction of rotation of the motor 17 indicated by the arrow 18.
  • the motion of the ram consists of two components, one of which is determined by the eccentricity of the crank pin 8 while the other component is determined by the eccentricity of the eccentric 12. These two motions may be added or subtracted depending on the mutual angular position of the two eccentric members, which position may be varied by rotating the one eccentric with respect to the other while the gears 14 and 10 are out of engagement. the stroke of the ram may be varied within certain limits.
  • Fig. 2 the position of the individual members of the device is shown at the rear reversing point of the ram position, while Fig. 3 shows the position of the members at the forward reversing point.
  • Fig. 4 the ram is shown in a position midway of its stroke length.
  • the parts shown in full line indicate the position of the latter when the center of the stroke length is passed during the return travel of the ram 1, while the parts shown by dash-and-dot lines show the position of the latter in the same point of the stroke length but during the forward travel of the ram.
  • the rotary angle 01. provides a measure of the period of time for the forwardand return travel of the ram through the front half of the stroke half at a constant speed of the gear 10.
  • a driving and control device comprising a ram arranged for longitudinal reciprocatory movement, a toggle joint plate pivotally mounted on a support and pivotally linked to said ram, a pivot pivotally linked with said toggle joint plate, two connecting rods hingedly 002;-
  • a driving and control device comprising a ram supported for longitudinal reciprocal movement, a toggle plate pivotally mounted on a supportand pivotally linked to said ram, two connecting rods pivotally connected to each other and an eccentric means driving each connecting rod, 2. link pivotally linking said toggle plate and said two connecting rods where they are pivoted to each other, and driving means for driving said eccentric means.
  • a driving and control device as claimed in claim 2 in which said driving means comprise a shaft on which one of said eccentric means is mounted, a crankshaft operatively connected to said shaft for rotation therewith, the eccentric on said crankshaft being a crank thereon, and a motor driving said shaft.
  • said driving means comprise a shaft on which one of said eccentric means is mounted, a crankshaft, a gear on said shaft, a gear on said crankshaft having the same number of teeth as the gear on said shaft and being meshed therewith, the gear on said shaft being slidable on said shaft, the eccentric on said crankshaft being a crank thereon, and a motor driving said shaft, whereby said gear on said shaft may be disengaged from said gear on said crankshaft and said crankshaft rotated with respect to said shaft for varying the position of one of two said connecting rods with respect to the other.

Description

Oct. 28, 1958 v F. RALL 2,857,768 v DRIVING Am CONTROL DEIICE INVENTOR:
. FELIX RALL 3 Sheets-Sheet l F 1 dAp i1 29 1955 AT TORNEYS Oct. 28, 1958 F. RALL muvma AND CONTROL DEVICE 3 Sheets-Sheet 2 Filed April 29, 1955 INVENTOR: FELIX RALL ATTORNEYS Oct. 28,1958 RALL 2,857,768
DRIVING AND CONTROL DEVICE Filed April 29, 1955 a Sheets-Shet s FELIX RALL INVEN TOR BY M/ wM/ ATTORNEYS United States Patent DRIVING AND CONTROL DEVICE Felix Rall, Biel, Switzerland, assignor to Giesserei & ivlaschinenfabrik Osterwalder A. G., Biel, Switzer- Application April 29, 1955, Serial No. 504,921
Claims priority, application Switzerland April 30, 1954 4 Claims. (Cl. 74-40) The present invention relates to a driving and control device in machines for the chipless deformation of workpieces, and more particularly for toggle presses.
It is an object of the present invention to provide a driving and control device in such machines, which permits an increase in the efiiciency of such machines in that either the working rate i. e. the number of pieces produced per time unit, or the effective operating time as compared with the total operating time may be increased, i. e the loss operating time of the machine reduced.
A further object of the present invention is the provision of such a driving and control device which is particularly adapted for use in combination with the reciprocating ram of a toggle press or the like.
A still further object of the invention is the provision of a driving and control device in connection with the reciprocating ram of a toggle press, which permits variation of the time slope of motion and the time slope of the pressure applied to said ram.
According to the invention the driving and control device comprises a ram which is supported for longitudinal movement and is hingedly in operative connection with a member movable under the influence of two superposed reciprocating components of motion one of which in its time slope is variable with respect to the other component.
The invention will now be more particularly described by way of example with reference to the accompanying drawings, in which:
Fig. l is a longitudinal section through a driving and control device for a toggle press,
Figs. 2 to 4 are diagrammatic views of the device in various positions of the ram, and
Fig. 5 is a view showing the slidably mounted gear and its position with the other gears.
Fig. 1 shows the construction of the driving and control device. A ram 1 supported for longitudinal movement is hingedly linked by means of a ram rod 2 with a toggle joint plate 3 which is pivotally mounted on a stationary abutment 4. A link 5 is in hinged connection with the plate 3 at one end, while at the other end it is rotatably mounted on the pivot 6 of a connecting rod 7. The rod 7 is connected with a crank pin 8 of a rotatably supported crankshaft 9 on which a gear 10 is firmly mounted. An additional connecting rod 11, which is rotatably supported on an eccentric 12, is linked to the pivot 6 of the connecting rod 7. The eccentric 12 is positively interconnected for rotation with a shaft 13, a gear 14 meshing with the gear 10 and provided with the same number of teeth being slidably mounted on the shaft 13. The gear 14, moreover, meshes with a gear 15 which is splined to the rotor shaft 16 of an electromotor 17.
At the position of the members shown in Fig. 1, the ram 1 carries out its forward movement or its operative stroke according to the direction of rotation of the motor 17 indicated by the arrow 18. The motion of the ram consists of two components, one of which is determined by the eccentricity of the crank pin 8 while the other component is determined by the eccentricity of the eccentric 12. These two motions may be added or subtracted depending on the mutual angular position of the two eccentric members, which position may be varied by rotating the one eccentric with respect to the other while the gears 14 and 10 are out of engagement. the stroke of the ram may be varied within certain limits.
From the position indicated in Fig. 1, the crank pin 8 thus travels downwardly upon continued rotation of the gears 15, 14 and 10, so that the connecting rod 11 and link 5 approach more and more their aligned position, that is the position in which their longitudinal axes will coincide. From this straightening action there results an upward rotation of the toggle joint plate 3 and thus a movement of the ram in the forward direction. At the same time, however, the eccentric 12 or the connecting rod 11, respectively, has passed through its rear dead center position and is now moved towards the left side by the movement of the eccentric, whereby an additional and simultaneous movement of the ram in the same direction is effected by means of link 5, toggle joint plate 3, and ram rod 2.
In Fig. 2 the position of the individual members of the device is shown at the rear reversing point of the ram position, while Fig. 3 shows the position of the members at the forward reversing point. In Fig. 4 the ram is shown in a position midway of its stroke length. The parts shown in full line indicate the position of the latter when the center of the stroke length is passed during the return travel of the ram 1, while the parts shown by dash-and-dot lines show the position of the latter in the same point of the stroke length but during the forward travel of the ram. The rotary angle 01., in this case, provides a measure of the period of time for the forwardand return travel of the ram through the front half of the stroke half at a constant speed of the gear 10.
From the magnitude of the angle designated by ,8, on the other hand, it may be seen that the period of time required for the rear half of the stroke is considerably shorter, i. e. the so-called dead periods of time will be very short for the forward travel as well as for the return travel so that a correspondingly longer period of time is available for the operative stroke of the ram.
However, not only the time slope of the motion but also the time slope of the pressure provided on the ram will be influenced by the described device since the pressure components of eccentric 12 and crank pin 8 are added together in the same manner as the motional components thereof by a suitable angular adjustment of the eccentric 12 in respect to the crank pin 8. Thereby it is possible to arrive earlier at the minimum working pressure relative to the length of the stroke. The operative stroke thus is lengthened, which fact in turn means a prolongation of the operating time. Therefore it is possible, 'even with large operating strokes or in case of deformation work, to allow the material sufficient time to flow so that it is nevertheless possible to operate with a very great number of strokes per time unit.
In addition it is possible to change the slope of motion and pressure not only in respect to time but also in its magnitude by varying the eccentricities.
I claim:
1. A driving and control device comprising a ram arranged for longitudinal reciprocatory movement, a toggle joint plate pivotally mounted on a support and pivotally linked to said ram, a pivot pivotally linked with said toggle joint plate, two connecting rods hingedly 002;-
By this means nected to said pivot, two eccentrics and driving means for said eccentrics disengageable from said eccentrics for permitting adjustment of the eccentrics relative to each other, each of said eccentrics being engaged by one of said connecting rods and adapted to move said pivot and impart a reciprocatory movement to said ram, as the sum of the superposed movements imparted to said pivot by both of said eccentrics.
2. A driving and control device comprising a ram supported for longitudinal reciprocal movement, a toggle plate pivotally mounted on a supportand pivotally linked to said ram, two connecting rods pivotally connected to each other and an eccentric means driving each connecting rod, 2. link pivotally linking said toggle plate and said two connecting rods where they are pivoted to each other, and driving means for driving said eccentric means.
i 3. A driving and control device as claimed in claim 2 in which said driving means comprise a shaft on which one of said eccentric means is mounted, a crankshaft operatively connected to said shaft for rotation therewith, the eccentric on said crankshaft being a crank thereon, and a motor driving said shaft.
4. A driving and control device as claimed in claim 2 in which said driving means comprise a shaft on which one of said eccentric means is mounted, a crankshaft, a gear on said shaft, a gear on said crankshaft having the same number of teeth as the gear on said shaft and being meshed therewith, the gear on said shaft being slidable on said shaft, the eccentric on said crankshaft being a crank thereon, and a motor driving said shaft, whereby said gear on said shaft may be disengaged from said gear on said crankshaft and said crankshaft rotated with respect to said shaft for varying the position of one of two said connecting rods with respect to the other.
References Cited in the file of this patent UNITED STATES PATENTS 480,737 Niemczyk Aug. 16, 1892 1,174,801 Babcock Mar. 7, 1916 2,035,222 Curtis Mar. 24, 1936 FOREIGN PATENTS 522,792 Great Britain June 27, 1940
US504921A 1954-04-30 1955-04-29 Driving and control device Expired - Lifetime US2857768A (en)

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Application Number Priority Date Filing Date Title
CH2857768X 1954-04-30

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BE (1) BE537110A (en)
CH (1) CH325535A (en)
DE (1) DE1153251B (en)
FR (1) FR1121370A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174347A (en) * 1961-04-20 1965-03-23 May Pressenbau Ltd Toggle lever system
EP0008906A1 (en) * 1978-08-26 1980-03-19 McGlennon, Gordon Lawrence Load multiplying mechanisms
EP0531804A2 (en) * 1991-09-10 1993-03-17 Umformtechnik ERFURT GmbH Drive for the ram of a mechanical press
EP1038658A2 (en) * 1999-03-24 2000-09-27 Kabushiki Kaisha Yamada Dobby Press machine
EP1043148A2 (en) * 1999-04-08 2000-10-11 Kabushiki Kaisha Yamada Dobby Press machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3029999A1 (en) * 1980-08-08 1982-03-18 L. Schuler GmbH, 7320 Göppingen KNEEL DRIVE FOR A PRESS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US480737A (en) * 1892-08-16 Anton niemczyk
US1174801A (en) * 1915-01-07 1916-03-07 George E Babcock Variable-stroke internal-combustion engine.
US2035222A (en) * 1936-01-09 1936-03-24 Charles G Curtis Poppet valve gear for internal combustion or other engines
GB522792A (en) * 1937-12-17 1940-06-27 Albert Ris Improvements in and relating to driving gear in four-stroke cycle internal combustion engines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB424315A (en) * 1933-05-13 1935-02-19 Alexandre Felicien Hubert Arrangement of connecting rods for eccentric presses particularly adapted for drawing and stamping
GB573132A (en) * 1943-12-07 1945-11-07 Bliss E W Co Improvements in and relating to mechanical presses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US480737A (en) * 1892-08-16 Anton niemczyk
US1174801A (en) * 1915-01-07 1916-03-07 George E Babcock Variable-stroke internal-combustion engine.
US2035222A (en) * 1936-01-09 1936-03-24 Charles G Curtis Poppet valve gear for internal combustion or other engines
GB522792A (en) * 1937-12-17 1940-06-27 Albert Ris Improvements in and relating to driving gear in four-stroke cycle internal combustion engines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174347A (en) * 1961-04-20 1965-03-23 May Pressenbau Ltd Toggle lever system
EP0008906A1 (en) * 1978-08-26 1980-03-19 McGlennon, Gordon Lawrence Load multiplying mechanisms
EP0531804A2 (en) * 1991-09-10 1993-03-17 Umformtechnik ERFURT GmbH Drive for the ram of a mechanical press
EP0531804A3 (en) * 1991-09-10 1993-05-26 Umformtechnik Erfurt Gmbh Drive for the ram of a mechanical press
EP1038658A2 (en) * 1999-03-24 2000-09-27 Kabushiki Kaisha Yamada Dobby Press machine
EP1038658A3 (en) * 1999-03-24 2002-04-17 Kabushiki Kaisha Yamada Dobby Press machine
EP1043148A2 (en) * 1999-04-08 2000-10-11 Kabushiki Kaisha Yamada Dobby Press machine
EP1043148A3 (en) * 1999-04-08 2002-04-17 Kabushiki Kaisha Yamada Dobby Press machine

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FR1121370A (en) 1956-08-13
DE1153251B (en) 1963-08-22
BE537110A (en)
CH325535A (en) 1957-11-15

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