EP0323113B1 - Magnetgetriebenes Nietwerkzeug - Google Patents

Magnetgetriebenes Nietwerkzeug Download PDF

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Publication number
EP0323113B1
EP0323113B1 EP19880312087 EP88312087A EP0323113B1 EP 0323113 B1 EP0323113 B1 EP 0323113B1 EP 19880312087 EP19880312087 EP 19880312087 EP 88312087 A EP88312087 A EP 88312087A EP 0323113 B1 EP0323113 B1 EP 0323113B1
Authority
EP
European Patent Office
Prior art keywords
rivet
setting tool
solenoid
tool according
engaging members
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
EP19880312087
Other languages
English (en)
French (fr)
Other versions
EP0323113A3 (en
EP0323113A2 (de
Inventor
Richard G. Weber
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.)
Emhart Industries Inc
Original Assignee
Newfrey LLC
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 Newfrey LLC filed Critical Newfrey LLC
Publication of EP0323113A2 publication Critical patent/EP0323113A2/de
Publication of EP0323113A3 publication Critical patent/EP0323113A3/en
Application granted granted Critical
Publication of EP0323113B1 publication Critical patent/EP0323113B1/de
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/24—Drives for riveting machines; Transmission means therefor operated by electro-magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel

Definitions

  • This invention relates to blind rivet tools and more particularly to blind rivet tools having an electromagnetic solenoid for actuating the rivet pulling mechanism.
  • a rivet mandrel is gripped and subjected to a progressive load until the mandrel breaks.
  • DE-U1-86 13 823.5 discloses an electromagnetically-powered blind rivet setting tool comprising rivet engaging members for engaging a rivet mandrel; a sliding element connected to said rivet engaging members for moving said rivet engaging members between advanced and retracted positions; and a solenoid device linked to said sliding element for moving said sliding element and adapted such that upon energizing said solenoid device said sliding element moves said rivet engaging members from the advanced to the retracted position.
  • an electromagnetically-powered blind rivet setting tool comprises rivet engaging members for engaging a rivet mandrel; a sliding element connected to said rivet engaging members for moving said rivet engaging members between advanced and retracted positions; a solenoid device linked to said sliding element for moving said sliding element and adapted such that upon energizing said solenoid device said sliding element moves said rivet engaging members from the advanced to the retracted position; wherein a resilient stop is provided with which said sliding element collides when said rivet engaging members reach the retracted position thereby to provide an impulse force, and wherein the mass of said sliding element and rivet engaging members and the pulling force of said solenoid means accelerate said sliding element and rivet engaging members so that upon collision with said resilient stop, the resulting impulse force created breaks the rivet mandrel.
  • the invention utilises a solenoid to operate a rivet engaging and pulling mechanism of a blind rivet tool, with an impulse intensifier creating a large impulse force to break the stem of the mandrel of a blind rivet.
  • the operation of the present invention uses an impulsive shock so as to break the mandrel whereas tools such as that disclosed in DE-U1-86 13 823.5 apply a progressively increasing force to break the mandrel. Even if the mass of the elements of the tool of DE-U1-86 13 823.5 were to be vastly increased and the solenoid pulling force increased, it would not be possible to operate the tool in the manner of the present invention to produce an impulsive shock so as to break the mandrel.
  • the invention provides a slideable interconnection between a nosepiece for housing the pulling mechanism, and a "power chamber" for housing the remaining tool components including the solenoid.
  • the force induced by the solenoid on the nose housing-pulling mechanism draws these structures toward the solenoid and causes the nose housing and power chamber to collide after the initial operation of the pulling mechanism of the tool. This impact creates an intensified impulse force to break the mandrel stem of a blind rivet.
  • the solenoid pulling force should accelerate and decelerate in a brief enough time, and the moving components should have enough mass, to create a sufficiently large impulse force to break the mandrel.
  • the power chamber includes a sleeve, the nosepiece being mounted to slide on the sleeve in a direction generally axial to the fastener.
  • the solenoid is reciprocably mounted within the tool body.
  • the solenoid when energised rearwardly, drives a ram until this abuts against a member which is linked to the rivet pulling mechanism, creating an impulse which serves to break the mandrel stem.
  • the action of the solenoid on the ram prior to such impact causes the tensioning of the mandrel stem.
  • a spring other biasing means may be interposed between the ram and the member so that the solenoid force on the ram is transmitted to the member during such period prior to impact.
  • the rivet mandrel gripping and tensioning assembly may be modified, or a different type of rivet may be employed, to reduce or eliminate the need for the rivet mandrel stem for tensioning the mandrel.
  • FIG. 1 and 2 illustrate a solenoid-powered blind rivet tool in accordance with a first embodiment of the invention.
  • the blind rivet tool 10 of this embodiment contains a nose housing 11 into which a conventional nosepiece 12 is threaded (See Figure 1). Positioned in nose housing 11 is a pair of jaws 14 which are adapted to grip mandrel stem 16 of blind rivet 18 in the conventional manner disclosed in our US-A-3254522. Jaw guide 20 surrounds the jaws 14 and is attached to draw bar 22.
  • Spring 24 is positioned in the draw bar 22 and biases jaw pusher 26 to maintain the jaws 14 open to accept insertion of the mandrel stem 16.
  • a rearward force on the draw bar 22 will pull the mandrel stem and set the blind rivet.
  • the tool housing (or power chamber) 36 comprises a rear portion 40 and a forward portion 38 which is secured to rear portion 40 by any convenient means.
  • a conical spring 50 is biased between wall 51 of the forward portion 38 of the housing 36 and a washer 52 positioned on the rear of the draw bar 22. The spring 50 biases the draw bar 22 toward the front of the tool.
  • a sleeve 54 has a flange 55 positioned in end cap 46 and surrounds the draw bar 22.
  • the nose housing 11 has an enlarged rear portion 56 slideably disposed about the sleeve 54.
  • a guide pin 58 in sleeve 54 rides in slot 60 of the nosepiece 11 to maintain the nose housing 11 and sleeve 54 axially aligned.
  • the solenoid core 32 will be drawn rearwardly (See Figure 2). This will cause the enlarged rear portion 56 of nose housing 11 to move rearwardly until shoulder 66 abuts flange 55 on sleeve 54. At this instant, the pulling force of the solenoid 34 will be intensified to break the mandrel stem.
  • the magnitude of the impulse force resulting from this abutment increases in proportion to the mass which accelerates and decelerates in conjunction with the rivet gripping and tensioning mechanism, and increases inversely with the square of the time interval over which acceleration and deceleration occurs.
  • a spring biased pin 68 which is positioned in detent 70 in the sleeve 54. After the rivet is set and the solenoid released, the spring 50 will return the nosepiece 11 to the forward position and the pin 68 will re-engage the detent 70 to eliminate any bounce of the nosepiece on its return to the forward position.
  • FIG. 3-5 A second embodiment of the invention is illustrated in the sectional views of Figures 3-5, in which like numerals refer to structures corresponding to those shown in Figures 1 and 2.
  • This second tool incorporates a fixed nosepiece and conventional mandrel pulling mechanism in accordance with US-A-3254522, and utilises a movable solenoid-ram structure to provide an impulse force within the tool in lieu of that provided by the movable nosepiece in the embodiment of Figure 1.
  • This arrangement avoids the disadvantage that movement of the nosepiece away from the workpiece complicates the setting of a rivet therein.
  • Solenoid 71 is slideably mounted with housing 45 the inner wall of which is suitably machined for this purpose.
  • Solenoid 71 is slideably mounted around alloy steel tube 74.
  • Steel tube 74 in turn is slideably mounted around hollow steel rod, which comprises a forward portion 86 threaded into draw bar 22 and a rear portion 87 slideably mounted in rear cap 93 of power chamber 45.
  • a ring 73 of dampening material (such as a foam polymer) and an alloy steel tube 75 (or, in functional terms, "ram") are secured around steel tube 74 at the rear of solenoid 71.
  • Steel tubes 74 and 75 provide high mass and magnetic characteristics suited to the operation of the tool.
  • Solenoid 71 is forwardly biased by outer compression spring 80, while steel tube 74 (with affixed structures 73 and 75) is forwardly biased relative to an elongated member in the form of steel rod by inner compression spring 81 placed between rod 74 and flange portion 89 of rod 85.
  • solenoid 71 and tube 74 are in their forward locations due to the action of springs 80 and 81.
  • solenoid 71 Upon energising solenoid 71, it presses against pliant ring 73 and steel tube 75, overcoming the respective spring forces to drive tubes 74 and 75 rearwardly until ram 75 impacts against flange 89.
  • the compression of spring 81 exerts a rearward force on flange 89 which produces rearward motion of rod, draw bar 22, and jaw guide 20 while causing jaws 14 to bite into and tension the mandrel stem 16.
  • Figures 3-5 shows a colinear, fixed connection between the rod 86, 87 and the pulling mechanisms in nose housing 11, wherein rods 86, 87 act as energy transfer members to transmit the impulse force.
  • Other mechanical linkages may be employed for this purpose.
  • the solenoid and related structures for generating the impulse force could be located in a tool handle at an angle to the nosepiece, and would be coupled to the draw bar by a translation-to-translation linkage.
  • Figures 1-5 have been illustrated using the mandrel pulling mechanism of US-A-3254522 to engage and tension a conventional single-headed rivet 18 (i.e. one having only a rivet-setting head 19).
  • a double-headed rivet such as that disclosed in our GB-A-2149709.
  • Figures 6 and 7 show in section an alternative nosepiece arrangement for engaging and tensioning a rivet 100 which has a pulling head 105 in addition to the rivet setting head 107.
  • jaw pusher 110 includes a clearance region 111 to accommodate pulling head 105.
  • Rearward motion of the rivet tensioning mechanisms causes jaws 114 to engage and pull back pulling head 105, for setting of the rivet and breaking of the mandrel stem, in accordance with UK patent 2149709.
  • this embodiment reduces or eliminates the need for tensioning the mandrel stem for gripping purposes in the embodiment of Figures 3-5, and facilitates the breaking of the mandrel stem which would depend essentially on the sudden pulling back on pulling head 105 at the time of generating the impulse force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Claims (12)

  1. Elektromagnetisch angetriebenes Blindrietsetzwerkzeug, das aufweist:
    nietergreifende Teile (14, 20, 22) zum Ergreifen eines Nietdornes (16);
    ein Gleitelement (11, 86, 75), das mit den nietergreifenden Teilen zum Bewegen der nietergreifenden Teile zwischen einer vorgezogenen und einer zurückgezogenen Position verbunden ist; und
    eine Magnetvorrichtung (34, 71), die mit dem Gleitelement (11, 86, 75) zum Bewegen des Gleitelementes verbunden ist und so angepaßt ist, daß bei einem Energetisieren der Magnetvorrichtung (34, 71) das Gleitelement (11, 86, 75) die nietergreifenden Teile (14, 20, 22) aus der vorgezogenen in die zurückgezogene Position bewegt;
    dadurch gekennzeichnet, daß
    ein elastischer Anschlag (54, 55, 89) vorgesehen ist, mit dem das Gleitelement kollidiert, wenn die nietergreifenden Teile die zurückgezogene Position erreichen, wodurch eine Impulskraft geschaffen wird, und dadurch, daß
    die Masse des Gleitelementes (11, 86, 75) und der nietergreifenden Teile (14, 20, 22) und die Zugkraft der Magneteinrichtung (34, 71) das Gleitelement und die nietergreifenden Teile derart beschleunigen, daß bei einer Kollision mit dem elastischen Anschlag die erzeugte resultierende Impulskraft den Nietdorn bricht.
  2. Blindnietsetzwerkzeug nach Anspruch 1, wobei das Gleitelement (11) ein Nasengehäuse (11) aufweist, in dem die nietergreifenden Teile (14, 20, 22) angeordnet sind; und der elastische Anschlag (54, 55) eine Muffe (54) aufweist, auf der das Nasengehäuse (11) gleitbar montiert ist.
  3. Nietsetzwerkzeug nach Anspruch 2, das desweiteren eine Einrichtung zum Halten der Muffe (54) und des Nasengehäuses (11) in axialer Ausrichtung aufweist.
  4. Nietsetzwerkzeug nach Anspruch 2 oder 3, das desweiteren einen federgespannten Stift (68) auf dem Nasengehäuse (11) aufweist, der in Eingriff bringbar mit einer Vertiefung (70) auf der Muffe (54) ist.
  5. Nietsetzwerkzeug nach einem der vorhergehenden Ansprüche, wobei die nietergreifenden Teile ein Paar Klemmen (14), eine Klemmbackenführung (20) zum Bewirken, daß die Klemmbacken den Dorn ergreifen, wenn die Klemmbackenführung gezogen wird, und einen Zugstab (22) zum Ziehen der Klemmbackenführung aufweist, wobei der Zugstab mit einem Magnetkern (32) verbunden ist.
  6. Nietsetzwerkzeug nach einem der vorhergehenden Ansprüche, wobei das Nasengehäuse (11) an der Muffe (54) so montiert ist, daß es parallel zu der Hauptachse des Nietes gleitet.
  7. Nietsetzwerkzeug nach einem der vorhergehenden Ansprüche, wobei die Magneteinrichtung (34) in einer Energiekammer (36) in einem Gehäuse untergebracht ist, die benachbart zu der Muffe (54) angeordnet ist.
  8. Blindnietsetzwerkzeug nach Anspruch 1, wobei die Gleitelementeinrichtung ein Teil (85), das an den nietergreifenden Teilen angebracht ist, und einen Kolben (75) in gleitendem Eingriff mit dem Teil (85) aufweist.
  9. Nietsetzwerkzeug nach Anspruch 8, wobei die Magneteinrichtung gleitbar auf dem Teil (85) montiert ist.
  10. Nietsetzwerkzeug gemaß Anspruch 8 oder 9, wobei der elastische Anschlag (89) einen Flansch (89) aufweist, der auf dem Teil (85) an dessen Ende angeordnet ist, und zwar gegenüber dem Ende, das an der nietergreifenden Einrichtung angebracht ist.
  11. Nietsetzwerkzeug nach einem der Ansprüche 8 - 10, das desweiteren eine Feder (81) aufweist, die zwischen dem Kolben (75) und dem elastischen Anschlag (89) angeordnet ist, wobei das Treiben des Kolbens in Richtung auf das Teil bewirkt, daß die nietergreifende Einrichtung den Nietdorn vor der Kollision des Kolbens und des Anschlags in Spannung versetzt.
  12. Nietsetzwerkzeug gemäß einem der Ansprüche 8 - 11, das desweiteren ein Gehäuse (45) aufweist, wobei der Magnet (71) gleitbar innerhalb des Gehäuses montiert ist, um sich im allgemeinen axial zu dem Niet zu bewegen.
EP19880312087 1987-12-30 1988-12-21 Magnetgetriebenes Nietwerkzeug Expired - Lifetime EP0323113B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13935687A 1987-12-30 1987-12-30
US139356 1987-12-30

Publications (3)

Publication Number Publication Date
EP0323113A2 EP0323113A2 (de) 1989-07-05
EP0323113A3 EP0323113A3 (en) 1989-12-06
EP0323113B1 true EP0323113B1 (de) 1994-09-14

Family

ID=22486227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880312087 Expired - Lifetime EP0323113B1 (de) 1987-12-30 1988-12-21 Magnetgetriebenes Nietwerkzeug

Country Status (4)

Country Link
EP (1) EP0323113B1 (de)
JP (1) JPH01197037A (de)
DE (1) DE3851521T2 (de)
ES (1) ES2059544T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4371681A1 (de) * 2022-11-17 2024-05-22 Bollhoff Otalu S.A.S. Setzvorrichtung für eine blindnietmutter

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003275842A (ja) * 2002-03-20 2003-09-30 Lobtex Co Ltd 電動リベッター
DE102010039670A1 (de) * 2010-08-24 2012-05-16 Adolf Würth GmbH & Co. KG Nietsetzgerät
CN108436016B (zh) * 2018-06-15 2024-04-30 湖北博士隆科技股份有限公司 一种手持式可自动退钉电磁拉铆枪
CN108746456B (zh) * 2018-08-29 2024-06-21 姚永法 一种快捷式拉铆枪
DE102020110969A1 (de) 2020-04-22 2021-10-28 Bayerische Motoren Werke Aktiengesellschaft Nietsetzvorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095106A (en) * 1961-12-28 1963-06-25 United Shoe Machinery Corp Automatic rivet setting tools
US3254522A (en) * 1964-01-29 1966-06-07 United Shoe Machinery Corp Hydraulic pop riveters
US3646791A (en) * 1970-11-06 1972-03-07 Grumman Aerospace Corp Method and apparatus for deforming a metal workpiece, for upsetting rivets, and for blind riveting
US4517820A (en) * 1983-06-22 1985-05-21 Usm Corporation Blind rivet tool
DE8613823U1 (de) * 1986-05-22 1986-07-31 Erwin Müller GmbH & Co, 4450 Lingen Blindnietzange, vorzugsweise Blindniet-Handzange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4371681A1 (de) * 2022-11-17 2024-05-22 Bollhoff Otalu S.A.S. Setzvorrichtung für eine blindnietmutter
WO2024104644A1 (en) * 2022-11-17 2024-05-23 Bollhoff Otalu Sas Setting device for a blind rivet nut

Also Published As

Publication number Publication date
DE3851521T2 (de) 1995-02-02
JPH01197037A (ja) 1989-08-08
ES2059544T3 (es) 1994-11-16
EP0323113A3 (en) 1989-12-06
EP0323113A2 (de) 1989-07-05
DE3851521D1 (de) 1994-10-20

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