US2671913A

US2671913A - Machine for removing insulation from the ends of wound armature wires

Info

Publication number: US2671913A
Application number: US25461A
Authority: US
Inventors: Carl W Kirsch
Original assignee: Hoover Co
Current assignee: Hoover Co
Priority date: 1948-05-06
Filing date: 1948-05-06
Publication date: 1954-03-16
Anticipated expiration: 1971-03-16

Description

KIRSCH MACHINE FOR REMOVING INSULATION FROM THE ENDS 0F WOUND ARMATURE WIRES March 16, 1954 3 Sheets-Sheet 1 Filed May 6, 1948 IN V EN TOR.

ATTORNEY.

March 16, 1954 Q w sc 2,671,913

MACHINE FOR REMOVING INSULATION FROM THE ENDS OF WOUND ARMATURE WIRES Filed May 6, 1948 3 Sheets-Sheet 2 INVENTOR. Carl W Kirsch BY 52M ATTORNEY.

March 16, 1954 2,671,913

C. W. KIRSCH MA NE FOR REMOVING INSULATION FROM ENDS OF WOUND ARMATURE WIRES 3 Sheets-Sheet 3 Filed May 6, 1948 INVEN TOR. Carl Wlfirrch ATTORNEY.

Patented Mar. 16, 1954 MACHINE FOR REMOVING INSULATION FROM ENDS OF WOUND ARMA- TURE WIRES Ga K ch, Canton, ilhic as igns to The Hoover Company, North Qanton, Ohio a gorporat ch of Ohio Application May 6, 1948, Serial No. 25,461

13 Qlaiins. (01. 1521) "this in ention relat s o the manuie ur o mo or a; d mo e art u arly t ap ar u for and me hod r m vin t e insulation f om t e n s o a em ed armat e ire p e a tory to con e tin such ends to h co m e men s.

in t e ast it has bee the r i to individuai y str p h ins la ion m e nds of as emhlesi armature w es by hand and to d clean the stripped ends, which procedure is slow, tedious, and costly. With some of the more reoentiy used insulating materials it is practically impossible to remove the ns l ti n t r imm by hand,

According to thi nvention he Wound armature is placed in a f xture and the machine automatically separates the wire ends, removes the insulation therefromand clean the wire.

More specifically according to this invention a plurality of armature holding fixtures are r0- tatably mounted on an indexing carriage having a plurality of work stations spaced thereahout. The arrangement is such that the carriage is periodically indexed so as to move the fixtures sequentially from one station to the At the first station the wound arinatures are laced in the lower section of the fixture, at he se ond t e en e se r ted nd end d ad al y o a l e t u per e of the lower fixture section, at the third section the upper fixture section is placed on the lower so as to clamp the Wires between the mating edges of the sections, at the {fourth station the nsula n o th te din e ds i eherred hr the applisa-t ion of an acetylene flame thereto,

At the f fth statio the charred insulation on ne Side 0. he e t din ends s em and the wire cleaned by the application of the abrading aetion of a wire or'similar brush, at the sixth station the radially extending ends of the wires are pushed upwardly to expose the other side of the wires and at the seventh station the charred nsulation is removed from the other side of the extending ends and the wire cleaned by the abratli ng action of a wire brush.

At the burning and abrading station the fig:- tures are rotated through at least one revolution so that all of the wires are treated. The indexing mechanism is so controlled that the rotation of the fixtures through one revolution will se t e a er o be indexe and h fi tu t he mo ed h m ne a io to he At the l a i wir c amp-i s and wi e turnin h tio th fi u e e st t o r A he wi e separating stat on the fixtu es re era ly 2 rotatetl high s ee so that he i e are to their redia i n by centri ugal aceprdine to the roadest aspec o .6 sub: method acc to thi n on he e es 9f the wires of a wound a mat a e nded into a rad l pos t on the in ulation he eof the red by the application of heat and the, eher esi nsulation. r moved to an ah as v ec 1 1 Accord n to h b oadest s ts of anoth r subcombination according to this invention the tree of a wound armatur a e se arat nd. ex en ed to a po tion exte din adia ly of t e arma u e by en rifu al action While a ng th mature a hi h spee nd h ldin the wi e soils in posit eh on the here of the e maturethe ob e t and ad a t es o t i n ntime will heceme aoe ht as th d s ri ion re= needs when tak n in imeeti h wi the eee m panyihed a n s wh ch:

Eligure 1 is a plan yievvoj aportionof the maohineof this invention showing the indexing carriaee a d h dr v ng and i e i m ns o the carriage and armature holding fixtures;

Figure 2 is a vertical sectional v ievvof the ma Qhine of this invention including a section throughpne of the fixtures as it appears at the hur ihe s ion;

Figu e 3 i a e s e t e i w o h m h n th in en on o n t tures a t ey appea at th va ou st ti ns Figure 4 is a vertical plan View of a fixture s it a e s a t e Wire tu n s i nd Fi ure 5 is a vertical plan view of the drive i-ng mechanism for the fixtures when positioned at the w e po tionin tat on- Referring to the drawings and particularly to Fig. 1 thereof, the working stations are indicated by the letters A to G, inclusive the station A being the loading and unloading station, B the wire separating and positioning station, C the wireclamping station, D the burning station, it the first ahrading station, F the wire turning station and G the second abrading station.

The-machine comprises a suitable supporting tra ne- IJ} rotatahl-y carrying a main spindle H which in turn carries the indexing carriage 12. The indexing carriage i2 rotatably carries a plurality of fixtures (at least one for each active station) generally indicated at l3 equally spaced a ou :iBBPQ i hQ Y-Q the car a e 1'12 fi ture it comprise a ve t cal in I4 rotatably supported in bearings |5 near the edge of the carriage l2. Integral with the spindle I4 is a lower fixture section l6 adapted to snugly receive a wound armature with the upper edge of the core adjacent to the upper edge of the lower fixture section |6 so that the free ends I 8 of the armature wires can be extended outwardly over the free edges thereof, An upper fixture section I9 is adapted to receive the commutator end of the armature I1 and has an opening 29 to receive the end of the armature shaft so as to rigidly hold the armature H within the fixtures l3. The mating edges of the lower section l6 and the upper section 9 have provisions for leading the wire ends I8 radially outwardly between the mating edges of lower section l6 and upper section I9. A pulley 2| is rigidly attached to the lower end of each spindle |4.

Rigidly attached to the main spindle II is an indexing ratchet wheel 22 which cooperates with an indexing arm 23 pivoted to the spindle and having a pawl 24 held in engagement with the teeth of the ratchet wheel 22 by a spring 25. The spindle H and correspondingly the carriage I2 is normally held against rotation by a pin 26 (Fig. 2) engaging in one of the plurality of openings 21 in the indexing wheel 22 and is held against reverse rotation when the pin 26 is released by a pawl 28 carried by the frame l and engaging the ratchet teeth of the indexing wheel 22.

Connected to the indexing arm 23 by means of a link 29 is the end of a piston rod 39, the piston 3| of which is adapted to reciprocate in a cylinder 32 suitably supported by the frame Ill. The end 33 of the cylinder is connected by a conduit 34 to a suitable control valve 35. The end 36 of the cylinder 32 is connected to the control valve 35 by a conduit 31. The control valve 35 is connected to a source of air under pressure by a conduit 38 and to a bleeder valve 39 by

conduits

40 and 4|. The arrangement is such that when the bleeder valve 39 is in the position shown in Fig. 1 there is a reduced pressure in the end 36 of the cylinder 32 and the p st n 3| is held in the position shown in Fig. 1. When the valve actuator 42 is pushed to the right the pressure is raised in the end 36 of the cylinder 32 and reduced in the end 33 so that the piston 3| will be forced to the opposite end of the cylinder 32 to that shown in Fig. 1. Any type of

valves

35 and 39 may be used which will produce the above result.

The fixture 3 are adapted to be rotated at stations D, E, and G by a motor 43 driving an endless belt 44 by means of a belt gearing 45, reduction gearing 46 and pulley 41. The belt 44 is threaded over the pulleys 2| at the stations D, E, and G, over the pulley 41 and over the idler pulleys 48, 49, and 50 suitably supported by the frame In. The pulley 41 is preferably of the same diameter or slightly larger than the pulleys 2| so that the fixtures l3 at the stations D, E, and G will be rotated at least once for each revolution of the pulley 41.

Rigidly secured to the shaft of the pulley 41 is cam wheel having cams 52 and 53 thereon. Cam 52 actuates the operator 42 of the bleeder valve 39 and the cam 53 actuates an on-ofi switch 54 adapted to energize and deenergize a solenoid 55 connected to the pin 26.

At the station B the pulley 2| is adapted to engage a friction wheel 58 (Fig. 5) driven by a high speed electric motor 59, pivotally secured to the frame l0 by an arm and spring-biased against a stop 6| by a spring 62. The arrangement is such that as the fixtures l3 are indexed to the station B the friction wheel 58 will engage the pulley 2| under the pressure of spring 62.

Preferably the motor 59 rotates continuously when the machine is in operation but a separate control switch may be provided. The motor 59 may also if desired be automatically energized upon the engagement of the friction wheel 58 with the pulley 2|. For example, an on-ofl switch could be actuated by the movement of the arm 60 as the wheel 58 engages the pulley 2|.

At the station D are a plurality of

acetylene burners

63 and 64 positioned above and below the wire ends I8 as shown in Fig. 2. At station E is a rotating Wire brush 65 which is continuously rotated downwardly in the direction of the arrow as indicated in Fig. 3. At station F a cam 66 (Fig. 4) suitably supported on the frame |0 engages a pin 61 carried by the plate 68 connected by rods 69 to a sleeve 70 slidably mounted about the lower fixture section |6 for a purpose which will be described presently. At station G is a brush H which is continuously rotated upwardly as shown by the arrow of Fig. 3. The station H is idle but the fixture I3 is being rotated. If desired the fixture could be made stationary at this station and it could then be made the unloading station.

Positioned to engage the top of the upper fixture section I9 at the stations E, F, and G are

cam plates

12 and 13 which automatically engage the top section l9 as the carriage I2 is indexed to tightly hold the sections l9 and I6 together so that the wire ends |8 will be tightly clamped. The

plates

12 and 13 may be fixed to the frame I!) in any suitable manner.

Operation A wound armature I1 is placed in the lower fixture section l6 at station A and the motor 43 started which will cause the pulley 41 to rotate in unison with the fixtures |3 at the stations D, E, and G. The cam 52 will eventually engage the operator 42 for the bleeder valve 39 so as to increase the pressure in the end 36 and decrease it in the end 33 of the cylinder 32 causing the piston 31 to move to the left and move the indexing arm 23 counter-clockwise as viewed in Fig. 1. Shortly after the engagement of the cam 52 with the actuator 42 the cam 53 will engage the actuator for the switch 54 to energize the solenoid 55 and withdraw the pin 26 from the opening 21 in which it is then positioned to free the carriage l2 for indexing movement. During the counterclockwise movement of the indexing arm 23 the pawl 24 will ride freely over the teeth of the indexing wheel 22 since the wheel is held against counter-clockwise movement by the pawl 28.

As the cam 52 rides free of the control arm 42 of the bleeder valve 39, high pressure will be reestablished in the end 33 of the cylinder 32 and the end 36 will be vented to low pressure. This will cause the piston 32 to move to the right and move the indexing arm 23 clockwise as viewed in Fig. 1. The pawl 24 will engage the teeth of the indexing wheel 22 and index the carriage l2 so that the fixture containing the wound armature will be moved to station B. By this time the cam 53 will have disengaged the control of the switch 54 to deenergize the solenoid 55 whereby the pin 26 which is spring-biased upwardly will snap into the next aperture 21 as the fixture reaches the station B so as to rigidly lock the carriage l2 against movement.

As the fixture l3 approaches station B the pulley 2! will engage the friction wheel 58 and pivot the motor 59 counterclockwise as viewed in Fig. 1 against the bias of spring 62 until the wheel 58 and pulley 2| are in good driving relationship with each other. This will cause the armature I! to be rotated rapidly so that the wire ends it will be separated and moved to a radial position overlying the upper edge of the lower fixture section It by centrifugal action. This result is shown at station E in Fig. 3.

It is to be understood that it is within the concept of this invention to move the wire ends l8 into their radial position by hand at station B but it is preferable that this be done by centrifugal action as above described.

During the movement of the wire ends 58 to the radial position the cam wheel 5! has been contlnuously rotating and eventually will render the indexing mechanism operable to index the carriage l2 another step to bring the fixture I3 with the armature I'E therein to the station C. At the station C the upper fixture section is is merely placed over the commutator end of the armature l1 so as to position the wire ends 48 between the mating edges of the fixture sections it and Hi.

Th cam wheel 5| will again render the indexing mechanism operative and the carriage [2 will again be indexed to bring the fixture with the wires extending through the walls to station I). As the pulley 2! approaches station D it will engage the endless belt 4 3 so that the fixture i 3 will be rotated in unison with the cam wheel 5 i. will bring the wire ends it with the insulation thereon into the flames from the burners E3 and 8:3. As the fixture i3 is rotated the insulation on both sides of one after the other of the wire ends it will be charred. During this action the fixture i3 will protect the insulation of the main part of the windings of the armature H from the heat of the flame so that only the insulation on the extending ends 18 will be charred. By the time the fixture l3 at the station D has made one complete revoture is also rotating in unison with the cam wheel 5|. The continuously rotating brush 65 will brush the wire ends it downwardly against the lower section it of the fixture I3, one after the other as the fixture i3 is rotated. The abrasive action of the wire brush 65 will remove the charred insulation from the top side of the wire ends 18 and will clean and polish the metal of the wires. By the tim the fixture It has made a complete revolution at station E the cam wheel 55- will.

again cause the indexing mechanism to operate and move the fixture to station F where the wire ends l8 are still tightly clamped between the fixture sections by reason of the engagement of the top section L! with the plate 72.

As the fixture leaves the station E the pulley 2i will disengage from the belt 44 so that the fixture will be stationary as it approaches and leaves the station F. Also as the fixture it approaches the station F the pin 5? will engage the cam 5t and raise the sleeve Til upwardly about the lower section [6 of the fixture l3 so as to bend the wire ends I 8 upwardly against the top section it. The cam wheel 5| will again cause the indexing mechanism to operate and move the fixture to station G. As the fixture leaves the station F the pin. 61 will ride over the cam 66 and the sleeve 70 will return to its downward position.

As the fixture l3 approaches station G the pulley 2| will again come into contact with the belt 44 and the fixture will be rotated at station G. The wire brush II will sweep upwardly over the lower sides of the wire ends l8 and brush them against the upper fixture section I9. The abrasive action of the brush II will remove the charred insulation from the lower sides of the wire ends 18 and clean the metal of the wire, one after the other as the fixture I3 is rotated as shown at station G of Fig. 3. At station G the wire ends are tightly clamped by the engagement of the upper section IS with the plate 13.

The indexing mechanism will continue to operate periodically until the fixture 3 with the stripped armature thereon again reaches the station A. The attendant then removes the stripped armature and replaces it with an unstripped one.

While in the above description, for reasons of clarity, the operation has been described in con nection with a singl fixture advancing step-bystep from station to station, the actual operation of the machine is continuous. As soon as one fixture It leaves station A another is moved into position and an unstripped armature is placed therein. When all of the fixtures are loaded the machine will be operating simultaneously at each station above described and the attendant will have to continuously remove a stripped armature at station A and replace it with an unstripped one.

From the foregoing it can be seen that this invention provides an apparatus and method whereby the insulation may be continuously stripped from the free ends of the wires of an as sembled armature and the wires cleaned and polished automatically without manual operation except the loading and unloading at station A and the placing of the upper fixtur section I9 over the armature at station C.

While I have shown but a single modification of my invention it is to be understood that this modification is to be taken as illustrative only and not in a limiting sense. I do not wish to be limited to the particular structure and method shown and described but to include all equivalent variations thereof except as limited by the scope of the claims.

I claim:

1. A machine for removing the insulation from and cleaning the ends of assembled armature wires preparatory to securing the ends to the commutator segments comprising; a table rotatably mounted about a vertical axis; said table carrying a plurality of rotatable spindles arranged annularly near'its periphery; a fixture for receiving a wound armature carried by each of said spindles; said fixtures including a housing to house the entire wound armature with the ends of the wires projecting through the walls of said housing; a plurality of operating stations spaced about the periphery of said table including a loading station, a burning station where the insulation on the ends of the wire is charred both above and below, a first brushing station where the charred insulation is removed from thetopof the ends of the wires, a wire bending station where the wires are bent upwardly to expose the lower sides of the ends of the wire and'a second brushing station where the charred insulation is removed from the under side of the ends of the wire; said stations being arranged in the order named; means for rotating the spindles positioned at the burning station and. at both brushing stations, and means rendered operable upon rotation of said spindles through at least one revolution of said spindles for indexing said table about its axis to move said spindles from one station to the next.

2. A machine for removing the insulation from and cleaning the ends of assembled armature wires preparatory to securing the ends to the commutator segments comprising: an indexing carriage; a plurality of rotatable spindles carried by said carriage; a fixture for receiving a wound armature carried by each of said spindles; each of said fixtures including a housing including a cover to enclose an entire wound armature with the ends of the wires projecting through the walls of said housing; a plurality of operating stations spaced about the periphery of said carriage including a loading station, a wire separating station at which the ends of the wires are moved to a position extending radially of the armature, a station at which the cover for said fixture is placed over the armature, a burning station where the insulation on the ends of the wires is charred, a first abrading station where the charred insulation is removed from one side of the wire ends and the ends cleaned, a wire bending station where the wires are bent to expose the other side of the wire ends and a second abrading station where the charred insulation is removed from the other side of the wire ends and the ends cleaned; said stations being arranged in the order named; means for rotating said spindles at the burning station and at both abrading stations, and means rendered operable upon the rotation of said spindles through at least one revolution of said spindles for indexing said carriage to move said spindles from one station to the next.

3. A machine according to claim 2 including means for rapidly rotating said spindles when positioned at said wire separating station to move the wire ends to their radial position by centrifugal action.

4. A machine for removing the insulation from and cleaning the ends of assembled armature wires preparatory to securing the ends to the commutator segments comprising; an indexing carriage; a plurality of armature receiving fix tures carried by said carriage; a plurality of operating stations spaced about the periphery of said carriage including a wire separating station where the wires are moved to a, position extending radially of the armature, a burning station where the insulation of the wire ends is charred and a plurality of abrading stations where the charred insulation is removed from the wire ends and the wire ends cleaned, means for rotating said fixtures at said burning and abrading stations, and means rendered operable upon the rotation of said fixtures through at least one revolution thereof for indexing said carriage to successively move said fixtures from one operating station to the next.

5. A machine according to claim 4 including means for rapidly rotating said fixtures at said wire separating station to separate the wire ends by centrifugal action.

6. An apparatus for removing the insulation from and cleaning the projecting ends of assembled armature wires preparatory to securing the ends to the commutator segments comprising; a rotatable carriage; an armature receiving fixture rotatably carried by said carriage; a wire separating station, a wire clamping station, a burning station, a first abrading station, a wire bending station and a second abrading station positioned about said carriage in the order named; means for rotating said carriage to bring said fixtures successively to each of said stations; means at said wire separating station for rapidly rotating said fixture to separate said ends by centrifugal action so that they project outwardly from said fixture; said fixture including a pro tecting and wire clamping cap to be applied at said wire clamping station; means at said burning station for charring the insulation on said projecting ends and for rotating said fixture to bring said projecting ends progressively past said charring means; means at said first abrading station for applying a clamping pressiu'e to said cap, applying a downward abrading action to the top side of said projecting ends and for rotating said fixture to successively bring said projecting ends beneath said abrading means; means at said wire bending station for maintaining said clamping pressure to said cap and for bending said projecting ends upwardly against said cap; and means at said second abrading station for maintaining said clamping pressure to said cap, for applying an upward abrading action against the lower sides of said projecting ends and for rotating said fixture to successively bring said projecting ends beneath said abrading means.

7. A machine for removing the insulation from and cleaning the ends of assembled armature Wires comprising, an indexing carriage, a plurality of rotatable armature holding fixtures arranged in a circle adjacent the periphery of said carriage, said fixtures including a bottom portion formed to support a wound armature with.

its axis positioned vertically and with the loose wire ends positioned above the top thereof. a.

said spindles at certain other stations includ-- ing said wire separating ttation, means for indexing said carriage so as to move said fixtures sequentially from one station to another, and means for rapidly rotating said fixtures at said wire separating stations at a speed sufficient to separate the loose ends of the wires by centrifugal action.

8. A machine according to claim '7 in which the station following said wire turning station is a clamping station and said fixture includes a top portion shaped to engage the top edge of said bottom portion and clamp the separated ends of the wires between the top and bottom portions, and said top portion being applied at said clamping station.

9. A machine according to claim 8 in which said fixtures include a lower rotatably mounted cup-shaped member, and an upper inverted cupshap ed member having its open edge mating with the open edge of said lower cup-shaped member, said upper cup-shaped member being shaped to receive the commutator end of a wound armature and said lower cup-shaped member being shaped to snugly receive the opposite end of the wound armature with the mating edges of said members positioned adjacent the commutator of the armature.

10. A machine for removing insulation from the ends of assembled armature wires comprising, an indexing carriage, a plurality of rotatable armature holding fixtures arranged in a circle adjacent the periphery of said carriage, said fixtures including a bottom portion formed to support a wound armature with its axis positioned vertically and with the loose Wire ends positioned above the top edge thereof, a plurality of work stations including a wire separating station positioned about the periphery of said carriage, gearing means arranged to rotate said fixtures at a. comparatively slow rate at certain only of said stations and to cease rotating them at certain others of said stations including said wire separating station, means for indexing said carriage so as to move said fixtures sequentially from one station to another, means for locking said carriage against indexing movement, means for simultaneously releasing said locking means and initiating the action 01 said indexing means, and means for rapidly rotating said fixtures at said wires separating station at a speed sufiicient to separate the loose ends of the wires by centrifugal action.

11. A machine according to claim 19 in which said fixtures include a lower rotatably mounted cup-shaped member, and an upper inverted cupshaped member having its open edge mating with the open edge of said lower cup-shaped memoer, said upper cup shaped member being shaped to receive the commutator end of a wound armature and said lower cup-shaped member being shaped to snugly receive the opposite end of the armature with the mating edges of said members positioned adjacent the commutator of the armature.

12. A machine for removing the insulation from and cleaning the ends of assembled armature wires preparatory to securing the ends to the commutator segments comprising; an indexing carriage; a plurality of armature receiving fixtures rotatably mounted in a circle adjacent the periphery of said carriage; said fixtures including a bottom portion formed to support a wound armature with its axis positioned vertically and with the loose wire ends positioned above the top edge thereof; a plurality of operating stations spaced about the periphery of said carriage including a wire separating station where the wires are moved to a position extending radially of the armature, a burning station where the insulation or the wire ends is charred and a plurality of abrading stations where the charred insulation is removed from the wire ends and the wire ends cleaned; means for rotating said fixtures at a, comparatively slow rate at said burning and a'brading stations and at a rapid rate at said wire separating stations sufficient to move the loose wire ends outwardly by centrifugal action; and means rendered operable upon the rotation of said fixtures through at least one revolution thereof for indexing said carriage to successively move said fixtures from one operating station to the next.

13. A machine according to claim 12 in which said fixtures include a rotatably mounted lower cup-shaped member, an upper inverted cupshaped member having its open edge mating with the open edge of said lower cup-shaped member, said upper cup-shaped member being shaped to receive the commutator end of a wound armature and said lower cup-shaped member being shaped to snugly receive the opposite end of the armature with the mating edges of said members positioned adjacent the commutator of the armature.

CARL W. KIRSCH.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 192,390 Joyce Apr. 20, 1875 248,120 Thompson Oct. 11, 1881 1,045,943 Burrows Dec. 3, 1912 1,136,119 Eberhart Apr. 20, 1915 1,424,482 Jannell Aug. 1, 1922 1,532,717 Schiller Apr. 7, 1925 Lakeman Mar. 11, 1930 1,776,394 Powell Sept. 23, 1930 1,332,127 Kennedy Nov. 17, 1931 1,898,809 Berg Feb, 21, 1933 2,177,898 Leguillon et a1 Oct. 31, 1939 2,210,216 Putnoky 1 Aug. 6, 1940 2,272,055 Carlson Feb. 3, 1942 2,294,789 Matteson et al Sept. 1, 1942 2 348,288 Fontaine May 9, 1944 2,432,868 Earl et al Dec. 16, 1947 2,435,239 Schu'o Feb. 3, 1948 FOREIGN PATENTS Number Country Date 15,977 Great Britain of 1898