US2494413A - Machine for cutting sheet metal - Google Patents

Machine for cutting sheet metal Download PDF

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Publication number
US2494413A
US2494413A US72449747A US2494413A US 2494413 A US2494413 A US 2494413A US 72449747 A US72449747 A US 72449747A US 2494413 A US2494413 A US 2494413A
Authority
US
United States
Prior art keywords
link
pin
tool
positions
link pin
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
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English (en)
Inventor
Slettengren Anders In Knutsson
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.)
Verkst S A B Haldex
VERKSTADS-A B HALDEX
Original Assignee
Verkst S A B Haldex
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 Verkst S A B Haldex filed Critical Verkst S A B Haldex
Application granted granted Critical
Publication of US2494413A publication Critical patent/US2494413A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • 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
    • Y10T74/1816—Crank, lever, toggle, and slide
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/20588—Levers toggle
    • 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
    • Y10T83/8845—Toggle links, one link pivoted to tool support

Definitions

  • The: invention refers to such machines for the cutting. of sheet-metal or similar materials, wherein the cutting toolis actuated by a togglejoint provided with twolinks, which are pivoted,
  • the fixed point of the-toggle-J'oint is adaptedv to be shifted in two extreme positions, i. e. one. working position, whereinlth'e. tool holder moves. sov that the edges of. the cutting tools are operating relatively near to one; another, and an idle position, wherein. the edges of: the cutting toolsare operating at. a greater distance from each other, so that the work piece can be freely introduced between the edges: of the. tools.
  • Said shifting. is preferably efl'ected. by an adjustment ofthe fixed pin ofthe link system, which pin..
  • control may be provided by varying the magnitudezof-z the oscillatorytransverse movements of the links toward both sides from the plane extending. through the two outer link pins.
  • the movement is then adjusted so that the links are caused to swing symmetrically on both sides. of said plane, in the one case, and substantially on one side of said plane in the other case.
  • the transverse movement attacking the intermediate pin of the links is assumed; to proceed with a constant amplitude and frequency.
  • a resulting movement of the tool is obtained, which is distihguished by a small stroke at a. certain oscillatory frequency, whereas in theother case a greater stroke of the tool is obtained at a frequency half as great as that in the former case.
  • the present invention relates. to. a. simplified:
  • the fixed link pin is fixedly adjustable: into. vari- 'ous positions. displaced transversally ofthe. di rection of movement. of the tool holder, in a manner such that the.- plane; extending; through the twozouter link pins may beradiusted to dinerent distances. from the: extreme positions of the intermediate link pin..
  • Figs. 1 and 2 illustrate diagrammatically twodifierent working positions. of the adjustable link point.
  • Fig. 3. shows a toggle-joint in; longitudinal section.
  • Fig. i is a sectional. sideelevation on line :l--4 of- Fig. 3.
  • transversely l of the driving motor. is. an eccentric with the centre point 2 and theradiusR. From here the motion is transmitted over the connecting rod L to the intermediate link point: of the togglejoint, saidlink. point having its extreme posii-t tions- 3, 4- at the distance of. 2R from each other.
  • the upper fixed. link. point. is designated by 5;
  • 6 denotes the lower, vertically guided link point in its lowermost position, whereas I designates this latter link point in its uppermost, position.
  • the points, 6 and constitute the end points of. the movement of the cutting tool in. its. working position.
  • the: intermediate point of the toggle-joint moves to: varying. distances from the plane extending As a result, a relativel'y long working. stroke 6--'
  • The. fixed link point 5 is eccentrically mounted, and may thus be moved to the point 8 by a turning movement of the corresponding journal, so as to cause the whole toggle-joint to be raised, so that the tool holder will move at a greater distance from the corresponding stationary cutting tool (not shown).
  • the tool then operates in an idle position, and work pieces may be introduced between the cutting tools.
  • Fig. 2 shows the fixed link point as shifted into a position 5', which has been attained by a continued turning movement of the eccentrically positioned journal.
  • the position is preferably adapted so that the distancebetween the extreme position 6 of the movable outer link point and the alternative positions 5 and 5 of the stationary link point is the same in both cases.
  • the fixed link point will be displaced laterally with respect to the other unchanged parts of the system, whereby the plane between the outer points 5' and 5 of the toggle-joint may be set into a symmetrical position relatively to the extreme positions 3' and 4 of the oscillating link point, which latter positions are fixed relatively to the plane extending through 5 and 6.
  • a shorter working stroke of the tool holder is obtained, which is how caused to move between the points 6 and 1' at a stroke frequency which is doubled as compared with the conditions in Fig. l.
  • the toggle-joint consists in one upper link 20 journaled on an upper link pin It over a bushing 21 and one lower link 22 pivotally connected to a tool-holder 23 by means of a link pin 24.
  • the links 28 and 22 are connected to each other by an intermediate link pin 25, the lower link 22 being journaled on the pins 24 and 25 by bearings 26 and 27, respectively.
  • Oscillating movement is imparted to the intermediate link pin 25 by an eccentric mounted on a stationary driving shaft 3
  • the eccentric has its center of rotation in point i eccentrically positioned relative to the center 2 of an eccentric disc 32 in an eccentric strap 33 and provided with a ball-bearing 34.
  • the eccentric strap 33 is connected to the intermediate link pin 25 by an eccentric rod 36 which is forked at the link end to form lugs 31 engaging the pin 25 over bushings 38.
  • the upper link pin I is rotatably mounted in the opposite walls 4
  • a handle I! pivoted about a pin I8 against the compression force of a spring l9 anchored in the head l2.
  • the link pin H] can be: rotated and fixed in any one of three positions 5 and 8 by snappingin the handle I! into one of the recesses l4, I5 and i6, in the casing wall 42.
  • the position occupied by the handle IT corresponds to the position 5' indicated in Fig. 2, providing for the tool-holder 23 two equally large strokes per revolution of the driving shaft 3
  • the handle 11 By simply shifting the handle 11 to recess l5, the single stroke operation of Fig. 1 will be obtained. If, however, the handle I! be swung to recess l6 corresponding to position 8 of Figs. 1 and 2, the tool-holder 23 will be lifted out of operating position and the tool will not cut but permit a work-piece to be inserted or removed, as the case may be.
  • the advantage of the invention primarily resides in that the raising of the cutting tool and the shifting of the stroke thereof may be effected by means of the same operating lever. Moreover, the invention highly simplifies the shifting of the length of stroke as such shifting may be eifected by a single manipulation even during the operation of the machine. The invention also provides for a simple and condensed assembly of the shifting mechanism within a closed housing.
  • a toggle-joint arrangement comprising in operation two links, one stationary link pin, one intermediate link pin and one movable link pin, said movable link pin being connected to a tool holder arranged to reciprocate rectilinearly, driving means connected to said intermediate link pin to oscillate the same between extreme positions transversely of the direction oi movement of said tool holder, one of the links being pivoted about said stationary and said intermediate link pins and the other link being pivoted about said intermediate and said movable link pins, said stationary link pin being movable into at least two positions transversely displaced relative to the direction of movement of the tool holder, and both of said positions being at a distance from a given common remote extreme position of said movable link pin equal to the maximum distance between the stationary and movable link pins, the plane extending through the axes of said stationary link pin when located in at least one of said positions and of said movable link pin passing between said extreme positions of the intermediate link pin, and locking means
  • said shifting device being capable of moving said stationary link pin into said at least two positions and into a position longitudinally further apart from said common extreme position of" said movable link pin than said two positions,
  • the said locking means fixing said stationary link pin in either of all said positions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Press Drives And Press Lines (AREA)
US72449747 1946-02-06 1947-01-27 Machine for cutting sheet metal Expired - Lifetime US2494413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE109346 1946-02-06

Publications (1)

Publication Number Publication Date
US2494413A true US2494413A (en) 1950-01-10

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ID=20313439

Family Applications (1)

Application Number Title Priority Date Filing Date
US72449747 Expired - Lifetime US2494413A (en) 1946-02-06 1947-01-27 Machine for cutting sheet metal

Country Status (5)

Country Link
US (1) US2494413A (de)
DE (1) DE848141C (de)
ES (1) ES176900A1 (de)
FR (1) FR940190A (de)
GB (1) GB628148A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2784598A (en) * 1952-03-07 1957-03-12 Western Electric Co Vibrating apparatus
US2829713A (en) * 1953-11-05 1958-04-08 Einar W Nilsson Flying shear and drive mechanism therefor
US2986947A (en) * 1955-04-18 1961-06-06 Svelsmekano Ab Control movement for cutting tool in metal plate cutting machine
US3107549A (en) * 1958-12-17 1963-10-22 Lyle E Matthews Continuously adjustable eccentric crank
US3229009A (en) * 1962-09-14 1966-01-11 Board Machinery Company Inc T Method and apparatus for forming composition board
US3426635A (en) * 1965-08-27 1969-02-11 Pullmax Ab Arrangement in sheet metal working machines,particularly nibbling machines
US4085779A (en) * 1977-04-06 1978-04-25 The Kartridg Pak Company Packaging machine
US5123889A (en) * 1990-10-05 1992-06-23 Ranpak Corporation Downsized cushioning dunnage conversion machine and cutting assemblies for use on such a machine
US5448933A (en) * 1994-03-01 1995-09-12 The Whitaker Corporation Stamping machine stripper and die set
US6080097A (en) * 1995-06-07 2000-06-27 Ranpak Corp. Cushioning conversion machine with single feed/cut motor
US6176818B1 (en) 1995-06-07 2001-01-23 Ranpak Corp. Cushioning conversion machine cushioning conversion method and method of assembling a cushioning conversion machine
US6311596B1 (en) 1990-10-05 2001-11-06 Ranpak Corp. Cutting assembly for a cushioning conversion machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912927A1 (de) * 1979-03-31 1980-10-16 Schuler Gmbh L Antrieb fuer eine presse
DE3029999A1 (de) * 1980-08-08 1982-03-18 L. Schuler GmbH, 7320 Göppingen Kniegelenkantrieb fuer eine presse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1434060A (en) * 1921-11-03 1922-10-31 Peerless Machinery Co Perforating machine
US1841884A (en) * 1931-02-14 1932-01-19 Nancy Kathryn Wallace Power jack
US2271771A (en) * 1941-05-21 1942-02-03 Bliss E W Co Adjustable stroke press
US2280587A (en) * 1941-03-20 1942-04-21 Bliss E W Co Press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1434060A (en) * 1921-11-03 1922-10-31 Peerless Machinery Co Perforating machine
US1841884A (en) * 1931-02-14 1932-01-19 Nancy Kathryn Wallace Power jack
US2280587A (en) * 1941-03-20 1942-04-21 Bliss E W Co Press
US2271771A (en) * 1941-05-21 1942-02-03 Bliss E W Co Adjustable stroke press

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2784598A (en) * 1952-03-07 1957-03-12 Western Electric Co Vibrating apparatus
US2829713A (en) * 1953-11-05 1958-04-08 Einar W Nilsson Flying shear and drive mechanism therefor
US2986947A (en) * 1955-04-18 1961-06-06 Svelsmekano Ab Control movement for cutting tool in metal plate cutting machine
US3107549A (en) * 1958-12-17 1963-10-22 Lyle E Matthews Continuously adjustable eccentric crank
US3229009A (en) * 1962-09-14 1966-01-11 Board Machinery Company Inc T Method and apparatus for forming composition board
US3426635A (en) * 1965-08-27 1969-02-11 Pullmax Ab Arrangement in sheet metal working machines,particularly nibbling machines
US4085779A (en) * 1977-04-06 1978-04-25 The Kartridg Pak Company Packaging machine
US5123889A (en) * 1990-10-05 1992-06-23 Ranpak Corporation Downsized cushioning dunnage conversion machine and cutting assemblies for use on such a machine
US6311596B1 (en) 1990-10-05 2001-11-06 Ranpak Corp. Cutting assembly for a cushioning conversion machine
US5448933A (en) * 1994-03-01 1995-09-12 The Whitaker Corporation Stamping machine stripper and die set
US6080097A (en) * 1995-06-07 2000-06-27 Ranpak Corp. Cushioning conversion machine with single feed/cut motor
US6176818B1 (en) 1995-06-07 2001-01-23 Ranpak Corp. Cushioning conversion machine cushioning conversion method and method of assembling a cushioning conversion machine

Also Published As

Publication number Publication date
ES176900A1 (es) 1947-03-16
DE848141C (de) 1952-09-01
FR940190A (fr) 1948-12-06
GB628148A (en) 1949-08-23

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