US2470340A - Deburring and polishing apparatus - Google Patents

Description

May 17, 1949.

E. E. cooK ET AL 2,470,340

DEBURRING AND POLISHING APPARATUS Filed July 15, 1946 a M @El 3 Sheets-Sheet l May 17, 1949. E. E. COOK ET AL DEBURRING AND POLISHING APPARATUS 5 Sheets-Sheet 2 Filed July l5, 1946 uw, MM, uw, w ki May 17, 1949. E. E. cooK ET AL 2,470,340

DEBURRING AND POLISHING APPARATUS Filed July l5, 1946 5 Sheets-Sheet 3 Patented May 17, 1949 DEBURRIN G AND POLISHING APPARATUS Ernest E. Cook and Harry J. Sadler, Minneapolis,

Minn., assignors to Almco, Incorporated, Minneapolis, Minn., a corporation of Minnesotal Application July 15, 1946, Serial No. 683,596

3 Claims.

Our invention relates to cooperating apparatus for deburring and polishing metallic pieces and the like and, generally stated, comprises a novel tumbler, a novel hoisting structure for elevating material to be tumbled and abrasive material to the tumbler, and a novel screening and transporting structure.

The primary object of our invention is to produce novel apparatus of the type generally above described, which is rugged in construction, relatively inexpensive to manufacture, which will occupy a relatively small space and which will greatly facilitate the plurality of operations required in the deburring of metallic pieces and the like.

The above and numerous other objects and advantages of our invention will become apparent from the following detailed specification, appended claims and attached drawings.

Referring to the drawings in which like characters indicate like parts throughout the several views:

Fig. 1 is a perspective view illustrating one of the phases of operation of our combined appare.- tus;

Fig. 2 is a perspective view of my improved apparatus illustrating a different phase of operation;

Fig. 3 is a front elevation of a hoisting mechanisrn, some parts being broken away;

Fig. 4 is a perspective view of the mechanism shown in Fig. 3, illustrating a different position of some of the parts, some parts being removed;

Fig. 5 is a horizontal section taken on the line 5 5 of Fig. 3; and

Fig. 6 is a side elevation of the screen of our.

apparatus.

Referring with greater particularity to the drawings, the numeral I indicates a horizontallydisposed tumbler frame, which, preferably, and as shown, is generally rectangular in form. Journallcd for rotation on a horizontal axis by means of bearings 2, (only one of which is shown) is a tumbler drum 3 having a peripheral opening 4 which is normally covered by a hatch, (not shown) fastened by means of a locking mechanism identified in its entirety by the numeral 5.'

The bearings 2 are fastened to the sides of the frame I. Depending from the corners of rectangular frame I are supporting legs 6, opposite Vpairs of which are tied together intermediate their ends by vertically-spaced tie-bars 1. Tumbler frame I, supporting legs 6 and tie-bars I cooperate to form a forwardly-opening tunnel beneath the drum 3 and transversely of the axis thereof.

The tumbler drum 3 is connected to a shaft 8 which is adapted to be driven from a motor 9 through connections including a motor driven belt I 0, a pulley I I and gears within a gear housing I2. The driving mechanism as shown is secured to and supported by one of the tie-bars 1.

A hood identified in its entirety by the numeral I3 is made up of a stationary cover element I4 and a hinged cover element I5, which, as shown in Figs. 1 and 2, is in its open position. The electric motor 9 is controlled by a conventional off- Manipulation of the switch I6 permits the drum to be stopped with the and-on switch I 6.

we use a hoise and a hoist pan indicated in theirv entireties by the numerals I'I and I8, respectively, see particularly Figs. 1, 3 and 4. The hoist pan I8 is in the nature of a rectangular open-topped box having vertical sidewalls I9, sloping end portions 20 and a flat bottom 2l. hoist pan I8 is open and hooded to form a delivery spout 22 for the discharge of materials therefrom. At its delivery end, the hoist pan I8 is equipped with a wheel 23 journalled in a swivelled bearing 24, and at its other end the hoist pan I8 is provided with a pair of Wheels 25 journalled in bearings 26, fast on the hoist pan I8. A centrally-located transverse hoisting bar 27 is secured at its ends to the sidewalls I9 of the hoist pan I8, preferably forward of the center of gravity of the hoist pan I8.

The hoist I'I comprises a hoist mechanism 28, a hoist mechanism supporting element 29 laterally projecting from the closed end portion of a vertically-disposed inverted U-shaped hoist frame member 3D, a horizontally-disposed U- shaped hoist frame member 3| and a brace member 32. The hoist mechanism 28 may be of any of the commercial type of self-contained motor- One end of thedriven units and is suspended from the supporting element 29 by a ring bolt or the like 33. A hook 34, carried by a sheave 35, is raised and lowered by means of a cable 36 that is wound on a drum, not shown, but which is contained in the hoist mechanism 28. The brace member 32 is actually an extension of the support element 29 and is welded or otherwise secured to the intermediate portion of the closed end of the horizontally-disposed U-shaped hoist frame member 3|.

Referring to Fig. 1, it will be seen that the hoist I1 carries anfoperating switch 31 mounted on a. bracket 38 which, in turn, is secured to the brace member 32. The switch 31 is connected to the motor of the hoist mechanism 28 by means off' wires within cables 39 and electricaltcurrent is supplied to the motor through a cable 4D. The legs (indicated by the numeral 413' offthe' vertically-disposed hoist frame member 3U at theirv extreme lower ends are welded' or'otherwisesecured to the intermediate portion' of legs-42- of the horizontally-disposed U-shaped hoist frame member 3|. As shown, the hoist frame elements- 29, 30, 3l and 32 are constructed of steel tubing or the like 'an'dthe composite :structure isof' a very rigidandrsturdynature. Aftrits open end;

the horizontal frame'member 31| fis 'sufficiently` wi'defito 'receiveT the .hoist pan' 1:8'. which' is conn-'ected to the: :hooks .34.or raising' 'and lowering 'by means of a bail 43, the central portionwof.

tenedto the -ends :of frame member 3.1, .and a pair of wheels 46 .'journalle'd' in 'bearings 41 ,pir-- otally mountedon'zthe f closed fen ds of'frame. member 3|. As shown :in Fig. 1, a .handle 48 is pivote'dv at 49- to -the-brace vmember 32 for moving the hoist H to l diierentfstations rsuch xas tumbler mechanism yor .a storage bin' -for the abrasive material.

It Awill be noted byreierence Vto Fig.. 1-, that when loading material :into-1 the tumbler drum 3 a portion of the rhoist'frame member f31l, inamely the open end' thereof, :extends tinto the. tunnel formed .by the :frame -I',..legs 'E Aand tief-bars Tof the tumbler trame mechanism below the drum 3.. Itbecomes' obviousfrom the foregoing that with `such a. tunnel-like arrangement rof the tumbler `framefstructure it is .not'necessary :to use a conventional hoist -frame with .an overhanging 'boom tand the necessarily attendant counter-weighted. base.

fFor automatically tilting "the :hoist 'pan.. ;I.8 'to pour 'material vinto. :the rdrum, we provide ya cable yI! .of 'predetermined length which is secured at one -end-.to thehoistframemember 3i', asiat 5I,'and hooked at its-other end, adjacent the spout end of the hoist, asfatf 52. When,vun der lifting 'operation of theihoist mechanism l23, the hoist .pan IH3 is araised to 'a-predetermined level, th'e-cableprevents.the spoutend. from ascending further,` and icontinued .raising of '-the, holst` pan I8 Aby vthe-hoist mechanism -28 causes the :hoist -pan d8 to tilt forward suiciently --to discharge itsy f contents :intothewdrlnn` i3 through the-peripheral `opening 4.

During the tumbling operation, the opening 4 is necessarily closed by a cover, not shown, and the hinged cover element I5 of the hood I3 is moved to a position wherein at least the entire upper half of the drum 3 is concealed. 0f course, prior to the closing of the tumbler drum 3, closing of the hood I3, and starting the motor 9, the hoist I1 and hoist pan I8 are removed from their positions at Fig. 1.

When the tumbling operation has been completed, it becomes necessary to discharge the contents from the tumbler drum 3 and separate the work-piecesfrom the' abras/ive material. This important function is accomplished rin a manner and by apparatus now to be described.

A screen 53 is mounted for oscillatory movements on a Asubstantially-rectangular screen frame 54 comprising side-bars 55, a rear end -bar :56, and an inverted U-shaped handle bar 51, which at its free ends is extended to form a pair ofv legs 58. A second pair of legs 59 depend from` the rear corners of the screen frame 54. The 'legs '5'9" terminate in bearings 60 with wheels 6I jonrnalled therein. A pair of longitudinal tie-bars 62 (only one of which is shown) conneet one reachl of legs A5,9,-adjacentythe bottom ends thereof. To. further strengthen the screen frame .54, .we provide va transverse tie-bar 6.3

based intermediate .the closedend of the handlei bar 51 .and the screen 53. IIhe screen .53 is suspended, adjacent its frontend, from `the frame 54, by a pair of hanger bars 64 pvoted `to the.

screen at 65.- and. to the Atrame .54 at 6,6. Adjacentits rear end, .thescreen53 is ,pivoted to .one

6,8; and at its lower .end-.is Apivotally secured to the end of pitman arrn 1U which is driven from au` electric motor 1I mounted on the rear end of the screenfframe54. .A.beltv1.42 runsoyer apulley 1-3 .on the shaftof fthe motor 1I and a .pulley A1.4

journalled on .the rear end of the screen frame- 54. A crank. .15 .under the pulley L4 is pivotally connected to and drives the pitman arm 1U to thereby oscillate the screen v53. (see particularly Fig. 6).

Electrical .current vis supplied to the motor 1I through wires in a cable 16 at the end of which a plug 11 engages a socket 'I8 mounted between spaced tie-bars `1 on the tumblerapparatus. vA control' switch v19 for the .motor ,1.I. is .also mount,- ed between said tie-bars 1 adjacent the tumbler motor control switch .I 6.

It will be noted that thescreenframe 54, legs 58 and 5.9, tie-bars .6,2 and screen 53.c0mbine to form.a.forward1yopening vtunnel into which they hoistpan L8 .is,adapted` to be .received (see Fig. 2).. Itxwillbe furtherseenby reference to Figs. 2 and 6 that the screen 53 slantsin a downward direction from the rear end ofthescreen unit to the front end thereof.

During. thetumbling operation and subsequent toremovalofthe hoist I1 from its positionin front of the tumbler drum.3, the screening unit. isy Wheeled .into vplace in the tunnel .formed by tumbler frame 4l, legs I5` and tie-bars 1, directly below. the opening 4f of -the tumbler drum 3. The hoist pan I8.is then placedin the tunnel formed by the screen frame l 54 and its associated parts. A-similar hoistpan I8 orany other container such as shown .by dotted linesand indicated by the numeral may.l then beplaced on the oor below the front endof the; screen 53v (see Fig. 6). Thev plugfll is then insertedinto thesocket 1,8. .When

the tumbling operation is completed, the screen 53 is put into operation by manipulation of the control switch 19 and the cover removed from the opening 4 in the tumbler drum 3. The drum 3 is rotated until the opening 4 is at the bottom thereof, and the contents discharged into the screen `53 through which the pieces of abrasive material fall into the hoist pan I8 under the screen 53. The finished work pieces tail over the forward end of the screen 53 into the container 80 which may then be removed. The hoist I 1 may then be used for recharging the tumbler drum 3 with the abrasive material from the hoist pan I8 or the material may be dumped into a storage bin, not shown.

While we have shown a preferred embodiment of our invention herein, it will be understood that this apparatus may be modied Without departing from the scope of the appended claims.

What we claim is:

l. A hoisting mechanism comprising, a horizontally-disposed forwardly-opening U-shaped hoist frame member, a vertically-disposed inverted U-shaped hoist frame member connected at its base to the opposite sides of the horizontal hoist frame member intermediate the ends thereof, a hoist-supporting element secured to the upper portion of said vertical hoist frame member and projecting forwardly intermediate the sides thereof, a hoist detachably secured to and depending from said hoist-supporting element, hook means carried by said hoist, a portable hoist pan adapted to pass between the side members of said horizontally-disposed U-shaped hoist frame member, a centrally-located transverse 3.

hoisting bar on said hoisting pan, a bail on said hoisting bar adapted to be engaged by the hook means carried by the hoist, and a cable secured at one end to the front end of the hoist pan and at its other end to the closed end of the horizontally-disposed hoist frame member, said cable being of a length to tilt the hoist pan forwardly to dump its contents when said hoist pan has been elevated to a predetermined position.

2. The structure dened in claim 1 in further combination with a brace member secured to the closed end of said U-shaped horizontally-disposed hoist frame member and projecting upwardly and forwardly to the closed end of the vertically-disposed hoist frame member and terminating in said hoist-supporting element.

3. The structure dened in claim 1 in which the forward end of said hoist pan is provided at one end with a delivery spout.

ERNEST E. COOK. HARRY J. SADLER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,266,569 Eggleston May 21, 1918 1,450,950 Jenkins Apr. 10, 1923 2,101,196 Ransoho" Dec. 7, 1937 2,131,771 Turnbull Oct. 4, 1938 2,387,693 Trevino Oct. 23, 1945 2,419,813 Berchtold Apr. 29, 1947 FOREIGN PATENTS Number Country Date 519,836- Germany Mar. 5, 1931v

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