US3269246A - Reciprocal cam drive for sheet metal shears - Google Patents

Reciprocal cam drive for sheet metal shears Download PDF

Info

Publication number
US3269246A
US3269246A US423984A US42398465A US3269246A US 3269246 A US3269246 A US 3269246A US 423984 A US423984 A US 423984A US 42398465 A US42398465 A US 42398465A US 3269246 A US3269246 A US 3269246A
Authority
US
United States
Prior art keywords
secured
wedges
shears
guide pins
beveled
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
US423984A
Other languages
English (en)
Inventor
Hanggi Max
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3269246A publication Critical patent/US3269246A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • Y10T83/8776—Constantly urged tool or tool support [e.g., spring biased]
    • Y10T83/8785—Through return [noncutting] stroke
    • 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
    • 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
    • Y10T83/8853—Including details of guide for tool or tool support

Definitions

  • the present invention relates to improvements in sheetmetal shears comprising two lateral columns interconnected by two superposed tubular struts, and two knives or blades adapted to coact for carrying out a horizontal cut and secured to blade-holder beams of which the lower one is rigidly connected to the respective strut, while the upper beam is vertically guided.
  • the improved shears of the above-mentioned type disclosed by my present invention are characterized in that the upper blade beam is secured to the lower ends of guide pins which are slidable in vertical guides built in the upper one of said struts and of which the upper end portions are tapered or beveled to one and the same side, and that with said beveled end portions coact sliding wedges immovably disposed on a tie rod that is in operative connection with a control assembly and during its working stroke causes said wedges to depress the upper blade beam and the blades secured thereto against the action of tension springs for the purpose of carrying out the cut.
  • the tubular struts between the side columns suitably are thick-walled steel pipes, in which case also the lateral columns are made of steel plates.
  • the shears thus may be used a welded steel frame, which affords various advantages over a cast-iron frame.
  • a further advantage resides also in the multiple guiding of the upper blade beam over its entire length.
  • FIG. 1 shows the shears partly in elevation and partly in vertical section
  • FIG. 2 is a cross-section through the shears
  • FIG. 3 is a vertical section through a control assembly belonging to these shears.
  • the shears shown in FIGS. 1 and 2 comprise two lateral columns that are interconnected by two superposed struts in the form of thick-walled steel pipes L1, 12.
  • the two columns 10 in their turn are made of steel plates to which are welded the steel tubes 11 and 12.
  • the shears thus are mounted on a steel frame of which the components are weldable to each other, which is not possible in the case of cast-iron frames.
  • the shears comprise, as is conventional, two knives or blades 13, 14 for carrying out horizontal cuts, which are called lower and upper blade and are secured to a beamlike blade holder 15 and 16 respectively.
  • the lower blade 13 is secured, in a manner known per .se, to the respective holder by means of a slot-and-bolt connection, and thus .is adjustable.
  • Holder 15 in its turn is connected to the lower steel pipe 11 on the upper side thereof in stationary relation, while the upper holder 16 to which the upper blade 14 is rigidly secured, is secured by means of screws to the lower ends of guide bolts 17 which are slidable in guides built in the upper steel pipe 12.
  • Each of said guides comprises a steel sleeve 18 mounted stationary in the wall of pipe 12, which sleeve is inserted from below into pipe 12 and is closed on top by a cover 18a.
  • the steel sleeves 18 are lined with a bronze bushing 19 in which is disposed the respective guide pin 17.
  • the steel sleeves 18 and their bushings 19 at their upper ends are slotted along their entire length in the direction of the axis of pipe 12.
  • the width of said slots is equal to the thickness of sliding wedges 20 which are disposed immovable on a tie rod 21.
  • the carrier pins 17 at their upper ends are tapered or beveled to one and the same side.
  • the sliding wedges 20 coact with these beveled faces, it being understood that the slide faces of the one parts and the others are inclined at angles that correspond to each other.
  • two vertical pins 22 are secured to the end portions of the upper blade holder 16 and extend through apertures in the wall of steel pipe 12 into the latter.
  • a compression spring 23 of which the upper end is engaged in a cap 22a through which extends the respective pin 22; and on the projecting threaded end portion of pin 22 is screwed a nut 22b.
  • the two compression springs 23 maintain the upper blade holder 16 in its raised position of rest that permits insertion of a metal sheet between the two blades 13 and 14.
  • Tie rod 2 1 is actuated from a control assembly shown in FIG. 3 and extends through one of the two side cheeks '10 of the machine frame.
  • Rod 21 further carries on its projecting end portion a rack member 24 rigidly secured thereto that is meshing with a gear 25 loosely mounted on an auxiliary shaft 26 that extends at right angles to tie rod 21.
  • Shaft 26 is mounted in a gear box 27 that is secured to the respective side check 10 of the machine frame.
  • box 27 also is mounted an intermediate shaft 28 that carries a flywheel 2? which is rotated from a motor 30 through a belt drive. Such rotation via a reduction gear 31 is transmitted to shaft 26 which thus is continuously rotated when motor 30 is turned on.
  • a claw clutch On shaft 26 is disposed a claw clutch of which one portion 32 is secured to the respective end side of the loosely mounted gear 25, while the other portion 33 with an extended hub member 33a thereof is mounted rotatable with shaft 26 but longitudinally movable thereon.
  • Hub portion 33a on its end portion remote from clutch member 33 carries a magnet disc 34 to which is associated a stationary annular relay magnet 35.
  • Tie rod 21 thereby is moved longitudinally towards gear box 27 to let the sliding wedges 20 act on the guide pins 17 and to depress same, together with the blade holders 16 secured thereto, against the action of the compression springs 23 for carrying out a cut.
  • current supply to the relay-magnet winding is interrupted again so that the two springs 23 return blade holder 16 to its upper starting position, whereby at the same time also tie rod 21 through the action of the guide pins 17 on to the sliding wedges 20 is restored to its original position.
  • the relay-magnet winding is again turned on, and the working cycle described above will be repeated.
  • metal-sheet shears comprising two side columns interconnected by tubular struts, two blades coacting for carrying out a horizontal cut, and two bearnli-ke blade holders to which said blades are secured, the lower holder being rigidly secured to the corresponding strut and the upper one being vertically guided, the improvement comprising guide pins to the lower ends of which is secured the upper blade holder, said guide pins being disposed in vertical guides built in the upper strut and being beveled at their upper ends to one and the same side, sliding wedges adapted to coact with the beveled faces, a tie rod on which said wedges are immovably mounted, and control means in operative connection with said tie red, the latter in the course of its working stroke causing said wedges through pressure on the beveled surfaces of said guide pins to depress the upper blade holder and the blade secured thereto against the action of tension springs for the purpose of carrying out the cutting operation.
  • each of the pin guides comprises a steel sleeve provided with a bush- 10 ing, said sleeve at the top and bottom being mounted in the wall of the upper tubular strut and on its upper end being provided with a slot for the passage of the respective sliding Wedge.
  • shears as set forth in claim 3 in which the upper 15 5. Shears as set forth in claim 4, in which the tie 20 rod on which are arranged the sliding wedges extends through one of the machine side-walls and comprises a rack portion on its projecting end, said rack'por-tion meshing with a gear mounted on an intermediate shaft of the control means, said gear on one of its two side faces being provided with the one half portion of an electromagnetically engageable claw clutch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
US423984A 1964-01-09 1965-01-07 Reciprocal cam drive for sheet metal shears Expired - Lifetime US3269246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH20864A CH405881A (de) 1964-01-09 1964-01-09 Blechtafelschere

Publications (1)

Publication Number Publication Date
US3269246A true US3269246A (en) 1966-08-30

Family

ID=4181714

Family Applications (1)

Application Number Title Priority Date Filing Date
US423984A Expired - Lifetime US3269246A (en) 1964-01-09 1965-01-07 Reciprocal cam drive for sheet metal shears

Country Status (4)

Country Link
US (1) US3269246A (de)
CH (1) CH405881A (de)
FR (1) FR1420185A (de)
NL (1) NL6500225A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732770A (en) * 1968-06-13 1973-05-15 Allamatic Corp Cutting means
US3775225A (en) * 1971-07-06 1973-11-27 Gloucester Eng Co Inc Machine for perforating and heat sealing a web including an elongated element with a multiplicity of drivers
US3874262A (en) * 1972-04-18 1975-04-01 Promecan Sisson Lehmann Punching machine or the like
US3913438A (en) * 1973-02-09 1975-10-21 Fabco Inc Wedge actuated cutting and/or forming tools
US3933070A (en) * 1973-02-09 1976-01-20 Fabco, Incorporated Wedge actuated cutting and/or forming tools
US3939686A (en) * 1973-02-09 1976-02-24 Fabco, Incorporated Wedge actuated cutting and/or forming tools
US6076447A (en) * 1996-12-24 2000-06-20 Damask; Douglas M. Hand operated punching device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US552710A (en) * 1896-01-07 Feries
DE524628C (de) * 1929-09-22 1931-05-11 Schloemann Akt Ges Block- und Barrenschere mit zwei beweglichen Messern
FR1088911A (fr) * 1952-01-19 1955-03-11 Dispositif de commande hydraulique pour le presse-tôle des cisailles
GB780165A (en) * 1954-04-09 1957-07-31 John Newsome Improvements in or relating to sheet metal working machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US552710A (en) * 1896-01-07 Feries
DE524628C (de) * 1929-09-22 1931-05-11 Schloemann Akt Ges Block- und Barrenschere mit zwei beweglichen Messern
FR1088911A (fr) * 1952-01-19 1955-03-11 Dispositif de commande hydraulique pour le presse-tôle des cisailles
GB780165A (en) * 1954-04-09 1957-07-31 John Newsome Improvements in or relating to sheet metal working machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732770A (en) * 1968-06-13 1973-05-15 Allamatic Corp Cutting means
US3775225A (en) * 1971-07-06 1973-11-27 Gloucester Eng Co Inc Machine for perforating and heat sealing a web including an elongated element with a multiplicity of drivers
US3874262A (en) * 1972-04-18 1975-04-01 Promecan Sisson Lehmann Punching machine or the like
US3913438A (en) * 1973-02-09 1975-10-21 Fabco Inc Wedge actuated cutting and/or forming tools
US3933070A (en) * 1973-02-09 1976-01-20 Fabco, Incorporated Wedge actuated cutting and/or forming tools
US3939686A (en) * 1973-02-09 1976-02-24 Fabco, Incorporated Wedge actuated cutting and/or forming tools
US6076447A (en) * 1996-12-24 2000-06-20 Damask; Douglas M. Hand operated punching device

Also Published As

Publication number Publication date
FR1420185A (fr) 1965-12-03
NL6500225A (de) 1965-07-12
CH405881A (de) 1966-01-15

Similar Documents

Publication Publication Date Title
US3269246A (en) Reciprocal cam drive for sheet metal shears
US3057239A (en) Single-cut drum-type shear with projectable cutter
DE1219859B (de) Anordnung zum Anhalten eines sich bewegenden langgestreckten Gutes
US2711792A (en) Veneer clippers
US3237829A (en) Roll-fed rod severing machine
US2110777A (en) Up-cut open-throat shear
DE580954C (de) Bleistiftspitzmaschine mit elektrischem Antrieb
US1945045A (en) Honing machine
DE2222376A1 (de) Verfahren und Vorrichtung zum Erzeugen von Rippen auf der Aussenflaeche von Rohrmaterial
DE923494C (de) Einrichtung zur Beeinflussung des Vorschubes von Heisseisensaegen
GB952434A (en) Knife bar actuating mechanism for paper cutting machines
DE942404C (de) Elektromotor mit durch das Staenderfeld gesteuerter mechanischer Zusatzeinrichtung
DE419111C (de) Vorrichtung an Pinnscheren u. dgl. zur Erzielung eines geraden, rechtwinkligen Schnittes
US3225637A (en) Reciprocable cutting mechanism for automatic cutting machines
DE654720C (de) Elektrisch angetriebene fliegende Schere
US1976155A (en) Core capping machine
CH202967A (de) Stromrichter für Starkstrom mit mechanisch bewegten Kontakten.
DE551143C (de) Drahthaspel
DE730048C (de) Einrichtung zur Ermittlung des Treibdruckes verkokender Kohle
DE550582C (de) Elektromagnetischer Selbstunterbrecher mit in einer Erregerspule beweglichem Anker, insbesondere fuer Wechselstrom
DE456592C (de) Elektrische Steuerung fuer Aufzuege
AT228624B (de) Photographischer Zentralverschluß mit von einem Galvanometer automatisch gesteuerter Belichtungsregelung
DE399162C (de) Mit einem Druckmittel arbeitender Regler
DE2743738A1 (de) Elektrischer stellantrieb fuer ventile o.dgl.
DE392616C (de) Einrichtung zur Herabsetzung der Reibung, insbesondere bei Regel- und Messvorrichtungen