US3547345A - High speed actuator assembly - Google Patents

High speed actuator assembly Download PDF

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Publication number
US3547345A
US3547345A US787913A US3547345DA US3547345A US 3547345 A US3547345 A US 3547345A US 787913 A US787913 A US 787913A US 3547345D A US3547345D A US 3547345DA US 3547345 A US3547345 A US 3547345A
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United States
Prior art keywords
magnetic
punch
actuator
actuators
assembly
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Expired - Lifetime
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US787913A
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English (en)
Inventor
Michael S Shebanow
Cheng-Hua Wang
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Honeywell Inc
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Honeywell Inc
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/02—Methods or arrangements for marking the record carrier in digital fashion by punching

Definitions

  • Each magnetic interposer operates a single punch knife and comprises a permanent magnet, a pair of magnetic pole face elements joined together by a solid magnetic shunt and having selectively energizable windings thereon, and a magnetic flexure spring having one end fixed to translate along a prescribed axis with respect to said pole face elements.
  • the free end of the spring is held in a flexed no-punch position against the pole faces by permanent magnet force, released by a selectively applied electromagnetic force to spring into a punch position, and then returned to the no-punch position by a selectively applied electromagnetic force of reverse magnitude. 1n the punch position the spring is stiffened by a preform whereby a vertical punching force may be transmitted axially therethrough to a punch knife.
  • the magnetic elements of a plurality of identical interposers are confined in a housing of nonmagnetic material which holds the elements in spaced fixed alignment with respect to a corresponding plurality of flexures and punch knives while shielding them to minimize magnetic crosstalk or other interference between the magnetic circuits of the respective interposers.
  • a dummy interposer is mounted in each end of the housing to provide a more uniform magnetic field across the entire actuator assembly.
  • the present invention relates to an improved assembly of mechanical actuators capable of reliable operation for extended periods at high speed.
  • the actuator assembly of the present invention includes a plurality of improved actuators having magnetic interposers and being disposed in a novel housing whereby interference between the magnetic circuits of the interposers is greatly reduced.
  • a universal requirement in the operation of a multihead high-speed punch unit is the rapid and synchronous operation of all punches which are simultaneously selected. Conventionally, this is accomplished by applying reciprocating linear motion from a common motive source to a plurality of actuators each adapted to transmit the motion to a corresponding punch knife.
  • Each actuator includes'an interposer which is selectively positioned in alignment with the punch knife to transmit driving force thereto when punching is desired.
  • One key to reliable operation then resides in the ability to shift the interposers rapidly and synchronously from a power transmitting to an inactive position or vice versaiA second key to satisfactory operation resides in the ability to reliably shift the interposers which have been selected.
  • the multihead punch is comprised of two columns of l2 punches oriented adjacent to each other to span two columns of a data processing card.
  • the columns of punches and driving means therefore are arranged between two opposed actuator assemblies each comprising l2 actuators.
  • the 12 actuators of an assembly are arranged in side-by-side relationship in a unitary housing which holds the actuators in alignment with respect to the punch heads and driving means.
  • the Masterson actuator assembly is a significant improvement over the prior art in that it is extremely simple and reliable.
  • the Masterson actuator and assembly have certain inherent characteristics which limit their use in an ultra high-speed punch operation.
  • the pole face elements of the individual actuators are mounted upon a pair of plates of magnetic material which extend the full length of the assembly housing.
  • An air gap between the plates operates as a shunt in the magnetic circuit of each individual actuator.
  • Each actuator includes a permanent magnet, a pair of pole face elements joined together by a solid shunt of magnetic material and having selectively energizable windings thereon, and a magnetic flexure which is moved between a punch position and a no-punch position under the positive control of selectively applied electromagnetic forces.
  • a free end of the flexure is normally held in a flexed no-punch position adjacent the magnet pole faces by permanent magnet force, released to spring into a punch position by selectively applied electromagnetic force, and then returned to the nopunch position by a selectively applied opposing electromagnetic force.
  • the actuator assembly of the present invention comprises a plurality of identical interposers having their magnetic elements confined in a housing which holds the elements in spaced, fixed alignment with respect to a corresponding plurality of flexures and punch heads.
  • the magnetic circuit of each actuator includes a solid shunt of magnetic material joining the pole face elements upon which the windings are retained to attain more efficient operation.
  • the respective actuators are confined in a novel housing of nonmagnetic material wherein the magnetic portions of the actuators are shielded by teeth of nonmagnetic material and crosstalk between magnetic circuits of the individual actuators is minimized.
  • a dummy actuator is mounted in each end of the housing to provide a more uniform magnetic field across the entire assembly.
  • FIG. 1 is a perspective view of a single actuator, having a magnetic interposer of the type used in the novel assembly of the present invention
  • FIG. 2 is a partial sectional view showing details of the interposer andthemagnetic circuits of an actuator utilized in a high-speed punch;
  • FIG. 3 is a perspective view of a housing adapted to confine a plurality of magnetic elements to fon'n an actuator assembly in accordance with the present invention.
  • FIG. 4 is a fragmentary front elevation view of an actuator assembly of the type shown in FIG. 3.
  • An actuator 1 of the type used in the present invention is shown as generally comprising a magnetic unit 3 and an interposer 5 arranged to operate a punch knife 7 to permit the selective application of punching force to the knife from a reciprocating column 9.
  • the magnetic unit 3 includes a permanent magnet 11 of a suitable high retentivity material such as Alnico V and a pole face unit 12 including a shunt 14, upper pole face bar 15, and lower pole face bar 16.
  • the upper bar, lower bar and shunt are all formed of a suitable low retentivity magnetic material such as Cast Armaco.
  • the pole face unit may be cast as a single structure or the upper and lower bars may be bonded to the shunt 14 in any suitable fashion to provide a unitary structure.
  • the shunt 14 is provided with openings 18, 19 therethrough by which the magnetic unit is supported in the assembly in a manner described hereinafter.
  • the permanent magnet is fixed against the shunt, in alignment with the upper and lower bars and may be held in that position by its own force.
  • an adhesive binding tape now shown, is preferably used to retain the permanent magnet against slippage.
  • An upper winding 21 is located on bar and a lower winding 22 is provided on bar 16. As shown, these windings are electrically connected in series to terminals 24, 25 on the upper side of bar 15 and are wound in a direction to create, respectively, aiding magnetic flux in the shunt and pole face elements.
  • the windings may be prewound and slipped over the insulated ends of bars I5, 16 thereafter being covered by a protective coating of a suitable insulator,
  • windings 21, 22 are adapted to be energized by a driving L circuit which includes power switch 26, a switching amplifier T 27 and a peaking circuit 28, in response to punch logic control signals applied to terminal 30 by a conventional punch control selection unit, not shown.
  • the interposer 5 is shown fixed to and carried with column :9 which reciprocates vertically as indicated by the arrow D under the influence of a conventional eccentric drive shaft and cam arrangement, not shown.
  • the interposer includes an elongate flexure 32 of magnetic spring material mounted -J between a no-punch preform 33 and a punch preform 34.
  • ,Flexure 32 and preform 34 are fixed adjacent each other and separated from column 9 by a spacer 36.
  • Spacer 38 separates flexure 32 from no-punch preform 33 by a predetermined air gap.
  • Suitable fastening means 40 are provided to hold the magnetic spring, preforms and spacers in fixed alignment against the punch column.
  • Preform 33 rests-adjacent the faces of bars 15,16 and serves as a guidefor flexure 32 in the nopunch position; while flexure 32-rests adjacent preform 34 in the punch position.
  • Preform 34 -ser've's to stiffen the flexure whereby it serves as a column to transmit punching forces axially applied thereto.
  • the preforrns are-fabricated of any suitable nonmagnetic material and are of'predetermined thickness sufficient to provide the desired stiffness.
  • the shunt l4 acts as a low reluctance path whereby the permanent magnet is not subject to the electromagnetic flux.
  • the shunt 14 acts as a low reluctance path for the electromagnetic flux as well as for any permanent magnet flux which does not pass across the air gaps between poles 1 5, 16 and the fiexures.
  • the bottom .51 is provided on eitherend with flanges 58 having openings therethrough by which the housing may be mounted to a frame of a multihead punch unit, not shown.
  • the front edges of the bottom 51 and top 55 are provided with slots 59 therein to accommodate the shunts"l4 of magnetic actuators of the type shown in FIG. 1.
  • Actuator 61 is shown confined in its home position in the housing 50 by screws or pins 62, 63 while actuator 65 is shown in exploded relationship to the housing. ln the complete assembly shown in FIG. 3 a total of 14 actuators would be mounted in the housing.
  • the l2 center actuators are designed to operate punch knives corresponding thereto.
  • the actuators of either end of the assembly are dummy units'used to provide a uniform magnetic field across'the assembly.
  • an actuator mounted in the center of the assembly would be exposed to stray magnetic fields from the several actuators mounted on either side.
  • the dummy actuators are mounted at either end of the assembly and are designed to have a higher level of magnetic strengththan theworking actuatorsnConsequently, each working actuator is exposed to a uniform level of stray magnetic field.
  • an assembly designed in-accordance'with the present invention could include any suitable plurality of actuators necessary for a particular application.
  • the housing 50 may be manufactured. by a casting operation with the slots 59 and other reference surfaces being machine finished by conventional methods.” Surface 70 of the bottom 51 is manufactured to a finished tolerance as is the inner lip 71.
  • the bottom of the shunt l4 of'each actuator is also finished to a close tolerance whereby the actuators are aligned in spaced fixed relationship to each other and to their corresponding flexures and punch knives when mounted in the housing 50.
  • the permanent magnets are held to the shunt 14 by their own force and rest against'thelip 71' whereby the ends of the magnet are locatedin alignment with the'ends of bars 15, 16 to provide uniform magnetic circuits for all the actuators.
  • FIG. 4 a fragmentary front elevational view of an actuator assembly is shown. Five actuators are shown spaced apart in the housing 50, with their respective magnetic circuits beingseparated by air gaps and shielded by teeth 80 of nonmagnetic material. It should be apparent that near the end of the assembly would be exposed to a lesser then deenergizing it to an accurately established, desired flux level.
  • An actuator-assembly including, I
  • each said interposer having a separate array of magnetic circuit elements including means for selectively generating magnetic flux in said magnetic circuit and a solid shunt of magnetic material connected between a pair. of spaced pole face elements;
  • I v I I said housing being formed of nonmagnetic material and including a reference surface thereon;
  • each said shunt means for receiving and confining the ends of each said shunt on said housing to locate the magnetic circuit elements of said respective interposers inspacedfixed relationship to said reference surface and said corresponding plurality of working elements; and 1' shielding means for isolating the magnetic-elements of each interposer from the magnetic. circuit elements of the other interposers in said assembly to prevent magnetic interfer'encetherebetween.
  • An actuator assembly including: I I
  • I a housing and a plurality of magnetic interposers confined therein, adapted to operate a corresponding plurality of I working elements;
  • each said interposer having a separate array of magnetic elements including means for selectively generatinginiagnetic flux .in said magnetic circuit and a solid shunt of magnetic material connected betweena pair of spaced pole face elements; a
  • said housing being formed of nonmagnetic material and including a reference surface thereon; i a
  • said housing further including, a pair'ofgparallel opposed sides,each of said sides 'having a plurality of slots formed in an edgethereof adapted to receive the ends of the magnetic shunts of said respective interposers;
  • shielding means for isolating the magnetic elements of each interposer from the magnetic circuit elements of the other interposers in said assembly to preventmagnetic ,in-
  • the actuator assembly of the present invention comprises a rigid composite group of actuators having the operative portions thereof presented to the interposers in perfect alignment. Furthermore, magnetic interference or crosstalk between the magnetic circuits of the adjacent actuators is minimized, if not eliminated.
  • This feature of the invention 'along with the provisions of solid shunts 14 joining the pole face bars, results in highly accuratev and selective magnetic circuits which are critically responsive to switching signals applied thereto and highly stable over long periods of operation. I
  • magnetic circuits for each actuatoncompi'ising a permanent magnet, solid shunt 14 and pole face elements 15, 16, results in highly accurate, selective, and easilyserviced magnetic circuits which are precisely responsive to switching signals applied thereto and highly stable over long periods of operation.
  • Anactuator assembly for a high-speed punch having a plurality of working heads comprising:
  • each said interposer having a separate array of magnetic circuit elements including a permanent magnet section
  • I magnetic shunt means connected across the poles of said permanent magnet, apair of .pole face elements connected, respectively, at the ends of said shunt means to define a working air gap therebetween and electrical winding means-mountedon said pole face elements;
  • said housing being formed in the shape of an open sided rectangular box defined by opposed top and bottom sides each having a front edge adjacent said open side, and up posed ends, said sides and ends being joined to a backwall;
  • said bottom having a reference surface formed thereon, the front edges of said top and bottom sides being formed with a plurality of pairs of spaced slots therein, adapted to receive, respectively, the magnetic shunt means of a corresponding plurality of interposers, and means for fastening said shunt means in said slots whereby the interposers are aligned in spaced fixed relationship to said reference surface and said working heads.
  • each of said shunt means comprises a solid bar of magnetic 5 material.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnets (AREA)
  • Moving Of Heads (AREA)
  • Linear Motors (AREA)
US787913A 1968-12-30 1968-12-30 High speed actuator assembly Expired - Lifetime US3547345A (en)

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US78791368A 1968-12-30 1968-12-30

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US (1) US3547345A (enExample)
JP (1) JPS5117855B1 (enExample)
CA (1) CA918214A (enExample)
DE (1) DE1965577C3 (enExample)
FR (1) FR2027370A1 (enExample)
GB (1) GB1273452A (enExample)

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JPS52147544U (enExample) * 1976-04-30 1977-11-09

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* Cited by examiner, † Cited by third party
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US3279690A (en) * 1964-10-08 1966-10-18 Honeywell Inc Mechanical apparatus

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Publication number Publication date
CA918214A (en) 1973-01-02
JPS5117855B1 (enExample) 1976-06-05
GB1273452A (en) 1972-05-10
FR2027370A1 (enExample) 1970-09-25
DE1965577B2 (de) 1980-03-13
DE1965577C3 (de) 1980-11-13
DE1965577A1 (de) 1970-08-27

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