USRE9468E - Ine for cutting the-teeth of metal gears - Google Patents

Description

a snem-snez- 1.

w. GLEASONf Machine for Cutting the Tefih of Metal Gears. No. 9,468.

Reiss'ued Nov. 16, I88

v far/anion: V 7 7/ flea/: 7 XW 3 Sheets-Sheet. 2.

- W. GLEAS ON. Machine for Cutting the Teeth of Metal Gears.- No. .9,4 68.

Reissued Nbv, I6, 1880.

Invarian- W2? Weason, /ar'- iii W. GIL'EASON.

Machine fnr flutting the Teeth of Metal Gears. No. 9,468. Reissued Nov. 16,1880.

f I Q73 1 1137.31 .95- 1 3 Sheets-Sheet 3 UNITED STATES PATENT OFFIGE.

WILLIAM GLEASON, or noonnsrnu, NEW YORK.

MACHINE FOR CUTTING THE'TEETH OF METAL GEARS.

SPECIFICATION forming part otlReis sued Letters Patent No. 9,468, dated Noveniber lfi, 1880. Original No. 175,859, dated April 11, 1876. Application for reissue filed March 22, 1880.

DIVISION A.

To all whom it may concern Be it known that I, WILLIAM GLEASON, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Gear Cutting and Dressing Machine; and I do hereby declare that the following is a full,

clear, and exact description thereof, reference being had to vthe accompanying drawings,

' making part of this specification, in which Figure l is a side elevation'of myiuvention, looking in the direction of the arrow 1 in Fig. 2. Fig. 2 is a top or plan view of the same. Fig. 3 is'an invertedview of the swinging slide D, looking in the direction of the arrow 2 in Fig. 1, the section being on the dotted line 10.

in the same. Fig. 4 is a vertical sectional view of the cylindrical support E and semi-- cylindrical turret P, looking in'the direction of the arrow 3 in Fig. 1, the section'being on the dotted line in the same. Fig. 5 is a view of a portion of the copying mechanism, looking in the direction of the arrow 4 in' Fig. '2, the section being on the dotted line y in Fig.

3. Fig.6 is an elevation of the swivel tool stock 112, looking in the direction of the arrow 5 in Fig. 2. Fig. 7 is an elevation of the toolvstock m, looking in the direction of the arrow 6 in Fig. 1. Fig. Sis asectiollal elevation of a portion of the bed-plate F and stud e, the section being on the dottedline z in Fig. 2. Fig. 9 is a view showing the spherical crank-pinf, with a portion of the connecting-rod a.

It is well understood by perso'n's versed in gearing that while the teeth of' spur-gears may be correctly formed by the revolving cutters as used in the ordinary gear-cutter, those N of bevel-gears can be only indifi'erently well formed by the same means. The error in the teeth of bevel-gears eutiin this manner is serious, in causing them to rattle when run at a moderately high speed, to crowd and run hard,-and in subjecting them to an uneven wear.

I Itis also well understood thatiu a correctlyout tooth of a bevel'gear everyline truly drawn along the surface of either face, or the point of the same, or bottom of the space between 'the teeth, should tend toward a common central point lying in the plane of the axis of the gear. To. produce a machine that will thus correctly dress the teeth of bevel-gears is the angles to those of the saddle. These adjustmen ts are eifectedand governed by means of the hand-wheels and screws I k.

J is a horizontalspindle,journaled nearthe top of the posts lof the head-stock O, to which it is equally wellis fitted the gear K to'bc out, and at'theother end of said spindle some'suitable indexing-apparatus, L, is attached.

0 is an extension-piece, reaching outfrom the side of, and rigidly fastened to, the'head-stock O, forming a support for various parts of the machine; and F is a bed-plate, provided with parallel slots in its upper surface, lying upon the extension-piece O, to which it is fastened by the stud 6, Fig. 1, extending down through the slots h", Fig. 2, of the said piece 0.

The upright cylindrical support E is rigidly fixed to the stationary bed-piece'A, and has its iipper end faced 011', and itsceuter bored out c'onically. the turret P is provided with a substantia: hearing in and upon the support E, as shown in Fig. 4..

It is an upright shaft passing centrally :through the cylindrical support E and turret 1?, having, its foot resting in a step at n. t

is ahorizontal shaft passing centrally through the boss S, in which it has its bearing, and is driven, in the working machines, by a belt running upon a cone-pulley keyed to the outer end of the'shat't t, in place of the crank U, Figs. 1 and 2. g and q, Fig. miter gears engaging each other, keyedrespectively to the shafts t and R.

block or crank-arm sliding therein, which, together wit-h the spherical crank-pinfiinserted in'the same, forms acrank having an adjusta- 4, are bevel or v s is a hubfastened to the shaft'R, and u is a dovetailed The lower or disk portion of H ble' throw. The block it is held at any desired hinge-joint, 0, by rn'eans of whichit may swing in a. vertical plane, or laterally in a horizontal plane, by means of the bearing the turret?"' has upon the support E. V

Tis a sliding saddle, carrying the tool-stocks m and m, sliding updn the ways r. a, is a rod connecting the'crank-pin f'with'the saddle T,

by means of the stud e, reaching down from the same through the slot h in the swinging slide D, as shown in Figs. 3 and 5.. By means of this connection the saddle T is made to reciprocate upon its ways as the crank s revolves, and the length of its reciprocal motion is regulated by changing the throw of the crank, which is effected by means of the above-mentioned sliding block a. The head 0 ot the stud e is fitted to a corresponding longitudinal slot cut in the under side of the saddle T, al 1* g which it may be moved and fastened at pietsurc by loosening the nutj. As the stud e is'made to occupy dititerent positions along said slot, the saddle T is caused to make its reciprocations nearer to or farther from the common center 0, Fig. 2, this being rendered neccssaryin cutting bevel-gears of different diameters. The connecting-rod a has its bearing at one end upon the spherical portionj or the nut, as shown in Fig. 5, and at the other end upon the spherical erankpin f, Fig. 9, which allows it to take the dilferent positions rendered necessary by the upward and down ward movements of the slide I), while' l'oliowing the curve of the tooth being out, without. undue friction or cramping.

The tool-stock m, carrying the cutting-tool 'n, Fig. 2, is mounted upon the upright cylindrical post 6', Figs. 1 and 6, rising from and forming part of the dovetailed slide-block m by which it has a swivel movement. The small stud 0 inserted in the said slide-block, and standing upright and within the vertical slot a cut in thetool-stock m, Figs. 2 and 6, forms a stop by which this motion is arrested when the said tool-stock'is at either of the two positions indicated by the full dud dotted'lines shown in Fig. 6. The slide-block m with the tool-stock m, is moved horizontally across the saddle T by the hand-wheel b, and the said tool-stock is capable ofbein graised and 1owcred upon the post 0 by means of the handwheel is. r

h, Figs. 1 and 2, is a spring-barrel supported from the slidel), to which itis'detachably connected by the bracket 1. The horizontal tripping-rod a is supported in said springbarrel, and provided near one end with the adjustable dogs 0 and 0. These dogs are to be so adjusted upon the rod that as the saddle T is carried baclt by the-connecting-rod to the position shown in fult lines in Fig. 2, the pin QAGQ 8?, projecting from the tool-stock m, is brought in.contact'with the dog 0 causing the said tool-stock to swing on its abo\ 'edescribed" bearing until one wall of the slot afiisb'rought against the stud c. This brings the cuttin tool it into position for the succeedingcut; and when the saddle has advanced to the position shown by the dotted lines in Fig. 2, the said pin .9 as shown in dotted lines at s, is brought in contact with the dog 0 turning the tool-stock the other way, which trips the cutting-tool, as shown at n or throws it movement. The shock of the successive cont acts between the pin s and the dogs a 0 is cushioned by the spiral springs contained within the spring-barrel h pressing against the sides of the collar "6 This collar'is adjustably attached to the rod of by. means of the set-screw c.

i, Figs. 1, 2, and 5, is a copying-form, held in the rest c,which is detachably connected to the bed-plate F.

c is a V-shaped hardened steel rider, firmly held in the bracket a which is bolted to the under side of the slide 1), and said rider presses upon the hardened curved face of the form t' by the weight of the swinging slide 1). As the latter is moved in the direction of the arrow 7 by the feed works, hereinafter described, the rider 0 follows the curve of the form, causing the cutting-tool to faithfully copy. the same, at a reduced scale, upon-the face of the tooth being planed.

To lessen friction,and for other purposes, it may be desirable to substitute a small hardened roll, to follow the form 1', instead ot the fixed rider, as shown.

I design to provide several forms similar to iof various curvatures and sizes, either of which may be fastened in the rest 0 and copied, as gears of difierent shaped and sized teeth may be required.

9, Figs. 1, 3, and 4, is a combinedspur and bevel gear revolving upon the fixed stud 0 The spnr-teeth of this gear engage with the teeth of the gear 9, keyed to the shaft it, while the bevel-teeth engage with the teeth of the bevel-gear g keyedv to the horizontal shaft t. This drives the feed-crank s and feed-rod a.

1), Figs. 1 and 2, is a pawl operated by the feed-rod a, which engages with the teeth of the gear 9 Figs. 1, 2, and 3. This, in turn, drives the gear 9 the motion of which may beregulatedat pleasure by moving the stud 6 along the slot k gear 9 is keyed, extending through the boss t Figs. 2 and 3, is threaded internally to fit the screw r, and in the slotted head r of the latter the strap r is pivoted. The other end of said strap is looped upon the stud c, Figs. 2 and. 8, which extends upward from a slot in the bed-plate F, and which may be moved to any part of the said slot by loosening the thumb-nut i to turn in either direction, either automatic As the gear or nut g is caused out; so-as not to, rub the tooth in its backward The sleeve to which the" I allyvby the pawl'in feeding or by the hand .the' teeth of the gear 9 Greatcare is used in the construction of the working machines to have the horizontal and vcrtical'axes of the swinging slide D meet in a common point, (represented at c, Fig. 2,) and to t'orm a right angle; to-hare the horizontal axis of the same and the axis of the spindle 'J in the same horizontal plane; and, in setting the cutting-tool n, to have the point of the same so adjusted as to be on a line with the ,center 0, and in the same horizontal plane as the horizontal axis 0 of the slide I). Then, in whatever position the swinging slide D may .bC- =-the direction of motion .of the cuttingpont of the tool it, when moving forward, will at all times be toward the point cl The slide D is capable of swingingthrongh a horizontal arc of ninety degrees by means of the turret P turning upon its bearing on the cylindrical support E-t-ha-t is, it occupies a position (represented by the dotted outline D in Fig. 2) parallel to the spindle J when cutting the teeth of a spurgear, or out ataright angle from said spindle when cutting the teeth of a crown-gear, or at an intermediate position when cutting the teeth of miter or bevel gears. At the. joint between the support E and turret P, commencing at a point directly under the 'axis 0, the convex surface of the turretP is-graduated at'ourth ofthe way around in degrees of the circle, a corresponding zeropoint being marked on the contiguous surface of the support E. The slide D stands in a position parallel to the spindle J when the two zero-points coincide. The axis of motion of the crank 8 being identical with the vertical axis of the slide D, and the axis of the feedcrank 8 being parallel with the horizontal axis oof the same, the connecting'rod a and feed-rod a will work equally well in whatever position the said slide D may be. When cutting the teeth of crown or very flat bevel-gears with the slide D swung out at, or nearly to, a right-angle with the spindle sion-piece (not shown) is employed, reaching I out from the bed-plate F, to hold the form z'in a' proper position.

I In operating my invention when planing the teeth of a bevel or crown gear, the gear, K, to be planed is fitted on a taper mandrel inserted in the end of the spindle J in the ori diuary manner, andbronght by the handwheels 1 and la into a position so that the aris of the spindle and the line passing through the-outer'and inner pitch circles of the teeth J, a second exten- (represented by dotted line from a too, Fig. 2) shallboth tend toward the center 0. The

slide D is swung out to correspond with the angle of the bevel, the crank s adjusted to the required throw, and the saddle'.[ broughtinto place by adjusting'the stud 0 so that the cutting-tool will move each way slightly beyond the ends of the teeth to be planed. ting-point of the tool a, which inclines down ward, is brought on an exact level with the horizontal axis 0 of the slide D by the handwhecl 7c, and extended beyond the edge of the said slide to the same distance the center 0 is therefrom by the hand-wheel b. The dogs 0 and o are adjusted to trip the tool properly at each end ot'the stroke. The stud c is fast- The cutened at the proper place in a slot in plate 1 the strap looped thereon, and the copying form 2' carefully" set. A tooth to be planed being indexed into position, the machine is ready to operate. The tool commences its out at the point of the tooth, and the feed, intermittingly.

at each successive str ol;e,enrries it thence toward the root of the same, planing off the face of the tooth, the form 2' being copied on the same as the tool advances. When the tool has reached the rootof the tooth the pawl 12 is thrown back by the attendant, and the slide I) brought back to the starting-point by the hand-wheel 6 The next tooth being indexed into position, theopera-tion is repeated, and so on till the corresponding face of every tooth of the gear is planed. If, as is often the case, both faces of the teeth are to be planed. a tool with its pointturned upward instead of downward, as shown at 22 Fig. 7, is used to plane the other face, using a copying-form of reverse curvature from the one shown at t. It the teeth are to be out upon a blank, they are first roughed ont' by cutting slots in the face of the blank in the place of the spaces between the teeth, and to the required depth for the same, after which the faces of the teeth are shaped, as above described. I

8 Figs. 1 and 2, is an upright rectangular post, forming a part of the dovetailed slideblock m from which it rises, and upon said post the toolstoclg m slides "ertically, both of which are moped horizontallyacross the saddle T by the Hand-wheel b 71, Figs. 1, 2, and 7, is'a second copying-form fastened to the upper surface of the saddle T; and c? is a hardened steel rider projecting from the side of the tool-stock m, and pressed upon the hardened curved surface of the same by the weight of the said tool-stock m, together with the tool-stock is moved by the hand-wheel b, or some suitablymrranged feed, from a posi- .tion represented at m, Fig. 7 in dotted outline, to the position m, (shown in full-lines',) the rider 0 carries the tool-stock and tool it gradually upward, the latter tracing the outline of the face of a spur-tooth, as shown in dotted lines. The tool-stock m, form i, &c.,

--the exertion of the serpentine spring 8 As The head-stock O is moved by the hand-wheel in the other case.

ture and size.

with the gear-spindle J and its supportingthat their axial lines shall intersect,'whereby as above described, together form an attachment designed to be used when cutting the teeth of spur-gears.

To operate my invention for this purpose the rest 0', Figs. 1, 2, and 5, with the form t, the stud e, and the tool-stock m, are removed.

is more nearly over the middleot' the bed-piece A,.as shown in dotted lines in Fig. 2. The slide 1) is swung, around parallel to the spin' dle J, as shown in dotted lines at D. The bed-plate F. is moved to a position under the same, as shown by the dotted lines F, and a post (represented in dotted lines at N in Fig. 1) is interposed between the bed-plate F andslide D, to which both are securely bolted, which forms-a support for the'latterand holds it immovably in a position exactly parallel to the spindle J. The spur-gear K, to he cut is fitted to the spindle, and indexed and brought to its place by the hand-wheels I and k, all as The cutting-tool, held in this case in the tool-stockm, the crank s, and other parts, are also adjusted as before described. The feed in this case I etl'ect by attaching a ratchet-wheel to the hub of the hand-wheel b and move it by a pawl worked in any ordinary manner; and as the cuttingtool, which commences its out at the point of the tooth, as before, is carried by the feed forward to the root of the same, it copies onto the face of thetooth the form t in exact curva- To plane the other face of the. tooth a form of reverse curvature from that of t" is employed; or the gear may be put upon the spindle the other side foremost.

What I claim as my invention isl. The turret P and slide'D, in combination carriage, when the parts are constructedand arranged substantially as shown, whereby their relative position is rendered adjustable to any desired extent, to adapt the machine to out or dress spur gears or bevels of any angles'in the same machine.

2. The combinationof the tool-saddle T with the spindle J, turret P, and slide D, when the last three elements are so arranged relatively any vertical or horizontal movement of the cutting-tool shall. not affect its radial reciprocation with relation to the axisof the gearwheel being operated hpon, asset forth.

In co'mbination with the pivoted turret I, hinged slide 1), and reciprocating tool carriage or saddle T, the connecting or g'overning strap 1 and adjustable pin 0, whereby, in addition to its reciprocations, the cutting-tool may be made to rise or fall or move toward or from the spindle J, for the purposes set forth.

4. In combination with the fslidel) and feedscrew r, the adjustable pine and link or strap 0, when the latter is suitably hinged to the feedscrew, substantially as set forth.

5. In combination with the pin 6, strap r hinged to the feed-screw 'r', the slide'D, ad-

justablefform' i, and rider 0, arraiiged to op-' erate conjointly for the purposes set forth.

6. The adjustable automatic feeding mechanism e a, reversible pawl p, screw 1", and hinged link ri, in combination with the slide D and pin c,'-for the purposesset-forth.

7. The slide-block m pivoted'to'ol-clamp m, stop 0 and pin 8 arranged upon the reciprocating saddle T, in combination with the adjust able stops 0 and 0 all operating conjointly, as and for the purposes set forth.

. 8. The clamping-collar 'i, in combination with the springs in the barrel h and rod a,

whereby thelatter is adjustable longitudinally,

wise-and spherical wrist-pin f, the pitman a and rising and falling slide D, for the purposes .set forth.

11. The combination of the tool stock or holder m, pattern-plate i, and saddle T with the swinging slideD, when arranged as speci- Y fied, for cutting spur gears or wheels.

' WILLIAM GLEASON.

, Witnesses I F. H. CLEMENT.

HAMLET S. BRIGes.

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