US3762260A - Zigzag blanking device in a press - Google Patents

Zigzag blanking device in a press Download PDF

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Publication number
US3762260A
US3762260A US3762260DA US3762260A US 3762260 A US3762260 A US 3762260A US 3762260D A US3762260D A US 3762260DA US 3762260 A US3762260 A US 3762260A
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US
United States
Prior art keywords
press
eccentric pin
die holder
blanking device
planet gear
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
N Taniguchi
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.)
Aida Engineering Ltd
Original Assignee
Aida Engineering 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 Aida Engineering Ltd filed Critical Aida Engineering Ltd
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Publication of US3762260A publication Critical patent/US3762260A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • B21D28/08—Zig-zag sequence working
    • 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
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4475—Tool has motion additional to cutting stroke during tool cycle
    • 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
    • Y10T83/8737—With tool positioning means synchronized with cutting stroke
    • Y10T83/874—Straight line positioning
    • 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
    • Y10T83/8742—Tool pair positionable as a unit
    • Y10T83/8743—Straight line positioning

Definitions

  • This invention relates to a blanking press and more particularly, to a zigzag blanking device in the press in which an intermittently advancing strip material is blanked or punched out in a two-row stagger or zigzag pattern to produce blanks which will be delivered to a subsequent processing press to be processed to desired products.
  • one object of the present invention is to provide a novel and improved zigzag blanking device in a blanking press which can effectively eliminate the difficulty inherent in the prior art blanking devices referred to above.
  • Another object of the present invention is to provide a zigzag blanking device in a blanking press in which co-operating blanking punch and die holders are in unison reciprocally displaced by a predetermined distance in an intermittent movement in a direction at right angles to the longitudinal axis of a strip material which is being advanced by a predetermined feed pitch in a path parallel to the longitudinal axis of the strip thereby to blank out of the strip in a predetermined stagger or zigzag pattern.
  • the unison reciprocal movement of the punch and die holders is effected by imparting movement from a drive shaft through a planet gear mechanism and an eccentric pin to the holders in such a manner that the movement of the holders from one extreme position to the other extreme position in the reciprocal movement stroke can be smoothly and gradually effected and the holders are substantially free of the effect to be produced in their movement whereby the blanking rate of the press can be increased so as to produce 50 blanks per minute with the traverse displacement distance of the punch and die holders of 250 mm, for example.
  • a zigzag blanking device in a blanking press of the type in which a punch holder and a die holder are arranged to reciprocally move in unison in traverse directions with respect to an intermittently advancing strip material to be blanked or punched out characterized in that said reciprocal traverse movement of said die holder and punch holder is effected by intermittently rotating a rotary disc provided with an eccentric pin by one-half angular distance of one complete rotation of said disc in a predetermined direction.
  • FIG.1 is a fragmentary plan view of a section of strip material to be blanked out showing the zigzag blanking operation mode to be performed by the zigzag blanking device of the present invention
  • FIG.2 is a fragmentary front elevational view in section of one preferred form of the zigzag blanking device constructed in accordance with the present invention
  • FIG.3 is an enlarged fragmentary side elevational view in section of said blanking device of FIG.2 taken substantially along the line llllIl therein;
  • FlG.4 is an enlarged fragmentary plan view of the extension of the die holder shown in FlG.2
  • FIG. 6 is a side elevational view of said sun and planet gear mechanism and its associated parts shown in F162.
  • FIG.2 of the accompanying drawings which shows one of the zigzag blanking-out station of the blanking device of a press and in this figure, reference numeral 1 denotes a punch mounted on a punch holder 3 and reference numeral 2 denotes a die mounted on a die holder 4 in opposition to the cooperating punch l.
  • the punch holder 3 is slidably fitted on a plurality of spaced vertical guide posts 5 projecting from the die holder 4, the punch holder 3 and die holder 4 are slidably movable in the horizontal direction.
  • the die holder 4 is adapted to be guided in a gib 7 which is in turn mounted on a machine frame 6 and slidably movable in both a first path along the center line X-X (FIG.2) along with the punch holder 3 and along a second path extending at right angles to the center line along with the punch holder 3 and guide posts 5.
  • the die holder 4, guide posts 5 and punch holder 3 are slidably movable left and right in the second path as seen in FIG.2.
  • the punch holder 3 is in close contact with a pressure plate 9 mounted at the lower end of a link bar 8 conventionally connected at the upper end to the crank shaft (not shown of the press.
  • the die holder 4 has on one side an extension having a substantially U-shaped (F164) and the transverse intermediate portion connecting the opposite legs of the U-shaped extension is provided on the underside with an elongated groove 11.
  • a slidable member which is fitted loosely on eccentric pin 14 mounted on a horizontal rotary disc 13 which is in turn fixedly secured to the upper end of a vertical rotary shaft 12.
  • the pin 14 is in threaded engagement with a threaded bar 17 which is mounted on the rotary disc 13 by means of a securing member 16 at right angles to the axis of the pin.
  • the eccentricity of the pin 14 can be varied or adjusted.
  • the eccentric pin 14 and its associated parts As the rotary disc 13 is rotated, the eccentric pin 14 and slidable member 15 are slidingly guided in the groove 11 in the die holder extension 10, whereby the die holder 4 and the punch holder 3 connected to the die holder 4 by means of the guide posts 5 can be reciprocally traversed in unison over the intermittently advancing strip A at right angles to the longitudinal axis of the strip.
  • the shaft For rotating the vertical rotary shaft 12, the shaft has at a point adjacent to the lower end a pinion 18 which meshes with a rack 19 which is slidably mounted in a supporting member 20 which is in turn supported in the machine frame.
  • the rack 19 is connected at one end through a pair of pins 23 and a link 24 to a reciprocal member 22 which is in turn slidably supported on a pair of stationary guide bars 21.
  • the reciprocal member 22 has on the underside an elongated groove 25 for slidably receiving a square slidable member 26. Loosely fitted in the slidable member 26 is an eccentric pin 30 which is integrally formed with a planet gear 28 which is in turn in engagement with a stationary sun gear 27.
  • the shaft 31 of the planetgear 28 is journalled in a larger gear 33 which is in turn rotatably supported on a stationary shaft 32 mounted in the machine frame 6.
  • the diameter ratio of the sun gear 27 to the planet gear 28 is 2 to l.
  • the larger gear 33 is in engagement with a smaller gear fixedly mounted on a rotary shaft 34 which is in turn imparted rotational movement thereto from the drive shaft not shown of the press through a suitable transmission mechanism not shown and the larger gear 33 is adapted to be imparted thereto the rotational movement of 180 per cycle operation of the press.
  • the material strip A to be punched out is intermittently fed in the press in increments by a predetermined pitch in a direction at right angles to the plane of FlG.2 by the conventional feed mechanism (not shown) adapted to be actuated in a predetermined timed relationship to the rotational movement of the press drive shaft.
  • the larger gear 33 in engagement with the smaller gear 35 on the drive shaft 34 which is imparted thereto rotational movement from the crank shaft of the press is adapted to rotate 180 per cycle operation of the press.
  • the planet gear 28 mounted on the larger gear 33 and engaging the stationary sun gear 27 revolves about the sun gear 27 while rotating about its own axis.
  • the eccentric pin 30 integrally formed with the planet gear 28 causes the slidable member 26 to move along the elongated groove 25 in the reciprocal member 22 in one direction and then in the other direction.
  • Such movement of the slidable member 26 along the groove in turn causes the reciprocal member 22 to move left and right along the stationary guide bar 27 as seen in FlG.6.
  • the rack 19 connected to the reciprocal member 22 through the link 24 and pins 23 also follows the movement of the reciprocal member 22 thereby to cause the pinion l8 engaging the rack 19 and the pinion shaft 12 to rotate reciprocally.
  • the reciprocal rotation of the shaft 12 in turn reciprocally rotates the rotary disc 13 fixedly secured to the shaft 12 in the same manner as the shaft 12 and as a result, the eccentric pin 14 fixedly mounted on the rotary disc 13 and received in the elongated groove 11 in the underside of the die holder extension 10 causes the die holder 4 and punch holder 3 to move together left and right as seen in FlG.2.
  • the traverse displacement distance S of both the die holder 4 and punch holder 3 can be adjustably set through adjustment of the eccentricity of the eccentric pin 14 on the rotary disc 13 by turning the adjusting screw 17.
  • the holders are substantially free of the effect due to their inertia force produced in their movement and as a result, the speed of the overall traverse movement of the holders per unit time can be increased and the processing rate of the press per cycle operation can be increased to S0 blanks, for example.
  • a zigzag blanking device in a press having a crank shaft and of the type in which a punch holder and a die holder are arranged to reciprocally move in unison in traverse directions with respect to an intermittently advancing strip of material to be punched out, characterized in that a planet gear is mounted on a first rotary shaft means which has imparted thereto rotational movement at a predetermined ratio to the rotation of the crank shaft of said press; a stationary sun gear disposed to be in engagement with said planet gear; a first eccentric pin integrally formed with said planet gear; a reciprocally movable member having an elongated groove for slidably receiving said first eccentric pin; a rack operatively connected to said reciprocally movable member and a pinion mounted on one end of a second rotary shaft means for meshing with said rack, said second rotary shaft means having a rotary disc secured to its other end, the rotary disc being provided with a second eccentric pin, and said die holder having an extension provided with a
  • a zigzag blanking device in a press comprising a horizontally reciprocal die holder, a vertically and horizontally reciprocal punch holder operatively connected to said die holder and having an extension provided on the underside with an elongated groove, said punch holder being movable independent of said die holder in its vertical movement and movable along with the die holder in its horizontal movement, guide means along which said die and punch holders reciprocally move in their horizontal movement, a vertical rotary shaft having at the upper end a rotary disc provided with a threaded eccentric pin which is slidably received in said elongated groove in the die holder extension, an adjusting screw mounted on said rotary disc in threaded engagement with said eccentric pin so as to adjust the eccentricity of the pin, a pinion mounted on said rotary shaft, a rack slidably mounted in the frame of said press for engagement with said pinion, a reciprocal member operatively connected to said rack and having an elongated groove on the underside, a pair of stationary guide members mounted in

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Punching Or Piercing (AREA)
US3762260D 1971-12-30 1971-12-30 Zigzag blanking device in a press Expired - Lifetime US3762260A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21418571A 1971-12-30 1971-12-30
FR7147776A FR2177453B1 (enrdf_load_stackoverflow) 1971-12-30 1971-12-31

Publications (1)

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US3762260A true US3762260A (en) 1973-10-02

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US3762260D Expired - Lifetime US3762260A (en) 1971-12-30 1971-12-30 Zigzag blanking device in a press

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US (1) US3762260A (enrdf_load_stackoverflow)
FR (1) FR2177453B1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927372A1 (de) * 1978-07-10 1980-01-31 Komatsu Mfg Co Ltd Stanzmaschine zum stanzen von loechern in metallbleche
FR2495973A1 (fr) * 1980-12-15 1982-06-18 Amada Co Ltd Appareil a decouper les flans, notamment metalliques
US4506574A (en) * 1983-01-26 1985-03-26 Kabushiki Kaisha Komatsu Seisakusho Zigzag feeder for blanking machine
US20050241360A1 (en) * 2004-04-30 2005-11-03 Miller Timothy B Apparatus and method for forming shaped articles
CN106862370A (zh) * 2015-12-11 2017-06-20 宁格朗电气股份有限公司 金属板材旋转冲模
CN108246832A (zh) * 2018-01-11 2018-07-06 无锡商业职业技术学院 一种汽车钣金压力平整装置及平整方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213730A (en) * 1963-10-17 1965-10-26 Textron Inc Stagger blanking mechanism
US3264915A (en) * 1964-07-17 1966-08-09 Compo Shoe Machinery Corp Automatic cutting machine
US3483784A (en) * 1966-05-20 1969-12-16 Avon Rubber Co Ltd Skive cutting machine
US3684164A (en) * 1970-08-05 1972-08-15 Bridge Data Products Inc Apparatus for punching, printing and verifying data cards

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213730A (en) * 1963-10-17 1965-10-26 Textron Inc Stagger blanking mechanism
US3264915A (en) * 1964-07-17 1966-08-09 Compo Shoe Machinery Corp Automatic cutting machine
US3483784A (en) * 1966-05-20 1969-12-16 Avon Rubber Co Ltd Skive cutting machine
US3684164A (en) * 1970-08-05 1972-08-15 Bridge Data Products Inc Apparatus for punching, printing and verifying data cards

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927372A1 (de) * 1978-07-10 1980-01-31 Komatsu Mfg Co Ltd Stanzmaschine zum stanzen von loechern in metallbleche
US4241632A (en) * 1978-07-10 1980-12-30 Kabushiki Kaisha Komatsu Seisakusho Blanking machine for blanking holes in sheet of metal
FR2495973A1 (fr) * 1980-12-15 1982-06-18 Amada Co Ltd Appareil a decouper les flans, notamment metalliques
US4475424A (en) * 1980-12-15 1984-10-09 Amada Company, Limited Blanking apparatus
US4506574A (en) * 1983-01-26 1985-03-26 Kabushiki Kaisha Komatsu Seisakusho Zigzag feeder for blanking machine
US20050241360A1 (en) * 2004-04-30 2005-11-03 Miller Timothy B Apparatus and method for forming shaped articles
CN106862370A (zh) * 2015-12-11 2017-06-20 宁格朗电气股份有限公司 金属板材旋转冲模
CN108246832A (zh) * 2018-01-11 2018-07-06 无锡商业职业技术学院 一种汽车钣金压力平整装置及平整方法
CN108246832B (zh) * 2018-01-11 2024-05-24 无锡商业职业技术学院 一种汽车钣金压力平整装置及平整方法

Also Published As

Publication number Publication date
FR2177453B1 (enrdf_load_stackoverflow) 1974-08-30
FR2177453A1 (enrdf_load_stackoverflow) 1973-11-09

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