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US1460528A - Apparatus for rolling gears by a new method - Google Patents

Apparatus for rolling gears by a new method Download PDF

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Publication number
US1460528A
US1460528A US410866A US41086620A US1460528A US 1460528 A US1460528 A US 1460528A US 410866 A US410866 A US 410866A US 41086620 A US41086620 A US 41086620A US 1460528 A US1460528 A US 1460528A
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Prior art keywords
shaft
blank
die
holder
gear
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US410866A
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English (en)
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Harold N Anderson
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Individual
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Individual
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Priority to US410866A priority Critical patent/US1460528A/en
Priority to GB24533/21A priority patent/GB169173A/en
Priority to DEA36272D priority patent/DE391080C/de
Priority to FR544804D priority patent/FR544804A/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/04—Making gear wheels, racks, spline shafts or worms bevel gears

Definitions

  • Another object is to combine the desirable features of both methods of rolling in a sin e machine.
  • i ig. 1 is a plan view of one of the machinos for rolling bevel gears.
  • Fig. 2 is a. rear elevation of n portion of the vmachine shown in Fig. i, it being the mechanism by which the die and blank are oscillated.
  • Fig. 3 is an elevation, rincipally in section, of the mechanism or rectfying the direction of rotation of the cani by whi the die roll is moyed toward the Blanks tiff guides 90.
  • the links 88 constitute a toggle joint of ⁇ which the fork 8T is the knuckle, and when the fork is moved to a position where the axes of the studs 89 intersect the axis of shaft 80 inx'plther Words, whenthe links 8S are moved to a position where they are in alinement with each other.
  • the cams 83 and 84 are moved on the shaft 80 into operative posi tions. They occupy thisgposition in Fi 2.
  • cams 83 and 84 are drawn toward each other by the links 88 and outof operative positions.
  • the clutches 72 and 73 are provided with theY usual shifting collars 100, each of which is'moved longitudinally on the shaft 68 by ⁇ av shifting lever 101, these levers being mounted to rock on fixed centers 102.
  • Each of the levers carries a roller 103 that coo erates with one of the cams, 83 and 84.
  • he levers 101 are connected together by a rod 104 so that they move in unison.
  • the gear. 67 will now be in driving connection with the shaft 68 and capable of rotating the gear 65. But since the gear 67 meshes with the side of gear 65 opposite io that with which gear 66 meshes. it is seen that the gear 67 rotates the gear 65 in a direction opposite to that in which 'gear 66 drives it.
  • the cam 84 again closes clutch 72, clutch 73 being simultaneously opened, an'd the direction of rotation of gear 65 is 'again reversed. In this way the gear 65 is driven automatically a predetermined distance in each direction, the reversals be in'g effected automatically as long as the cams 83 and' 84 remain in operative position.V
  • the vertical shaft 93 is mounted to rock in a. bracket carried by the base 26.
  • An arm 111 is keyed to the upper end of the shaft and it is provided with a recess 112 formed by two depending lugs 113.
  • a short distance below the hub of the arm lll n similar arm, 114. is loosely mounted on the shaft 93. the outer end of this arm having a recess 115 simler to recess 112 and also formed by lugs 113. these lugs. however, extend upward instead of depending.
  • a sleeve 116 which extends downward on the shaft 93 a suitable distance and at its lower end carries a forked arm 117.
  • Loosely mount ed on the shaft 93 between the hubs of the arms 1.11 and 114 is e; collar 118 to which is pivotally attached a lever 119, the piv4 otal axis being horizontal. that the lever may be rocked upward or downward from a central or neutral position. The lever may also be laterally rocked because of the collar being loosely mounted on the shaft.
  • Each of the arms. 111 and 114 carries a fiat spring 121. These springs bear against opposite sides of the lever 119 and hold it in a central or neutral position.
  • the forked arm 117 is connectedf to the clutch 77, so that. when the arm 114 l rocked on the shaft 93 the clutch is op ned or closed.
  • a shaft 130 rotating in bearings 131 on the base 25, has keyed to it a cam 1 32 and it is necesn sary to rotate this cam one revolution to roll each blank. moving ity continuously in one direction, notwithstanding the other parts of the machine are oscillating part of the time.
  • a worin gear 133 is keyed to the shaft 131.7 and is drirerrb)r a worm (not shown) on the shaft 134, which rotates in bearings 135.
  • a shaft 136 in longitudinal alinement with shaft 134 rotates in bearings 137 and is driven by spiral gears 138 and 135). lVhen the jack shaft is being driven by the clutch 7T the shaft 13G drives shaft. 134 through an automatic friction 'lutch (sec Figs. 3 and 4). This will now be desrribcd.
  • Fig. 3 is will be seen that the ends of the shafts 134 and 136 almost abut. listed to he extreme end of the shaft 136 is a gear 14() having a hub 141 to which is keyed the member 142 of the automatic friction clutch ⁇ this bein f seen to the best advantage in Fig. 4. 'eyed to the extreme end of the shaft 134 a gear 143 having a hab H4. Severed to this hub is a ring. 145 whirh extends beyond the heb into the zone ot the member 14'2. The member 142 is cnt aurai' at three points to forni recesses 146 inmwhirh rolls 14T are confined.
  • the rolls are oper-andy pressed toward the. higher points ot the reielreiitricy faces by spring ⁇ pressed plnngcrs 149 ⁇ so that when the mein ber 142 starts to rotate in the direction dicated by the arrow the rolls grip the ring 145 al ost instantly, so that there is substantial no lost. motion in that direction by the mem ⁇ r 142.
  • the shaft 136 is oscillated along with the other parts of the machine. Half of the time, therefore, it is rotating in a. direction opposite to that in which the clutch 7T drives it and at these times the member 142 rotates in the direction opposite to that indicated by the arrow in Fig. 4.
  • I provide a rectifyin device, oomprising a second automatic c utch mounted on a shaft 150.
  • a ⁇ gear 151 keyed to this shaft is driven by the gear 1.40 through an intermediate gear 152, shown aiso in dotted lines in Fig. 4. Keyed to a.
  • a clutch member 153 just like member 142 except that the eeeentrie faces face the opposite way.
  • Loosely mounted on the shaft 150 is a gear 154 carrying e ring 155 similar to ring 145.
  • Rolls 156 confined in the recesses erform the same function as rolls 147.
  • i ien the shaft 136 rotatesbackward, that is,y contrary to the direction in which clutch 7T drives it, the gear 154 is frictionally driven by this second clutch and it drives the gear 143 in the same direction. that the member 142 drives it. It is thusfseen that whether the machine is oscillatingr or rotating,1 continuously in one direction the shaft 134 is rotated forward, drivingr the cani 132 in the right direction always.
  • Fig. T is an enlarged View of the cam 132 and in dotted lines a portion of the roller 52 is shown in the position it occupies with. reference to the cam when a gear blank is being placed in the holder 40.
  • the follower 46 is constantly urged by the springf to more toward the earn. so that the roller 52 bears on the periphery of the cam at all times. Then the blank has been secured in the holder the operator raises the lever 11.9 and throws it to the left, thus potting into operation the oscillating' mechanism. which valises rotation of the cani in the direction indicated bv arrows in Fiffs.
  • the earn is assumed to be divided into several sectors; the action of the sertor .i' ⁇ - to .more the roller 52 a considerable distnnre toward the blank, which brings the die roll practically into engagement with the blank.
  • the sector B-C continues the movement ot the die and causes the teeth to sink into the blank, the die and blank continuinor to oscillate during this time. I prefer to time the os' filiation so that the blank will rotate ap? proxiniatcly from one to three revolutions each way. rThis however is not essential and in some cases different timing may be found preferable.
  • the timing may be varied by changing the speed ratio of shafts medusa B 68 Iand 80.
  • the velocity of the cam varies just as the velocity of the die and blank holder varies. It is seen, therefore, that while the characteristics of the movement of approach between the diel and holder are determined by the contour of the cam, the movement of approach is modified in accordance with the velocity of the die and holder.
  • the advance may be completed during the oscillatory operation.
  • the continuous rotation may be omitted and the blank ⁇ completed by oscillation alone.
  • these steps are within the scope of my invention. but I preferthe procedure first described: by sinking the die to nearly the required depth by oscillatory rotation a symmetrical tooth structure -is built up which will be practically unaii'ected by the slight additional advance which the die makes during ⁇ the one direction rotation.
  • the one direction rotation may be regarded as merely a prolongation of the last step in ddie gently against the blank and the b the oscillation, and if desired the advance of the die into the blank during this last step need be no greater than its a vance during any single step of the oscillation.
  • the lever rests on a stop pin 169 and when it is necessary to use the lever this lin is removed, so that the lever may be roc ed downward, bringing the member 167 into engagement with the lug 168.
  • Fig. 10 s ows a modification of the machine which has just been described, adapted to roll spur lgears, and as the mechanism for oscillating t e die and roll and subsequently rotating them in one direction only is identically the same as that just described, it is not Y necessary to again describe it.
  • the same reference numerals are aflixed to the several parts as were used in describing the corresponding parts in the previously de scribed machine. I will therefore confine the description of the spur machine to the parts that are diii'erent.
  • the jack shaft 60 carries a spur gear 1 5 in place of the bevel gear 63 carried by this shaft in Fig. 1.
  • This gear meshes with a gear 176 on a .shaft 177 that is journaled in bearings 17 8.
  • the shaft 177 carries one member v179 of the blank holder.
  • the opposite member, 186, of the blank holder is carried by one end of a shaft 181 which is adapted to slide longi tudinally and rotate in a bearing 182.
  • the shaft 181 is moved toward the shaft 177 by a spring (not shown) and itmay be moved in the op )osite direction by means of the lever 183 ilulcrumed at 184.
  • the blank 165 is inserted between the members 179V and 1S() of the holder it is clamped temporarily by the spring before referred to, which moves the shaft lill toward the shaft 177.
  • Die roll 1.5'6 is mounted ou a shaft 187 ljournalefl in bearings 18H that are carried by sliding carriage 169. this carriage being sup ported by guides 190 carried by the hase 25.
  • the shaft 187 is driven by the jack shaft 6o through universal joints 191. which allows the die roll 186 to be moved to and fro with reference to the blank While the proper speed ratio of the die and blank is main tained by the gears 175 and 1.76.
  • a thrust bearing 192 which carries a ramp 193.
  • Projecting laterallyI from the carriage 182) is en erm 194 carrying a block 19.5 whose position may be adjusted with reference to the arm '1.94 by a screw 196. Then the carriage 159 is moved to bring the die roll into engagement with the blank the block 195 ridesY across the ramp 193 and presses the blank holder niember 18() firmly against the blank. The blank is thus held tightly in the holder while the;
  • the present machine has a shaft 45 which is moved endwise in one direction by a spring 51 and in the other direction by the cam 132 just as is the euse in the machine shown in Fig. 1.
  • the shaft 45 is attached to the carriage 189 and moves the carriage to and fro just asL in the other miichine 'it moves the die roll.
  • shaft 134 carries s, gear 200 which meshes with gear 201 secured to a shaft 202 mounted in a boerin ⁇ 203, which shaft carries the Worm (not s own) that drives the gear
  • the die is advanced by rnotion of tile jack shaft 60 with either oscillatory or direct rotation. inst as in the machine shown in Fig. 1.
  • Fig.' 9 I show a machine for rolling bevel gears which operates on e diferent principle' from either of the machines already described.
  • the blank 210 is carried on the end of a iack shaft 211 mounted in bearings 212.
  • a bevel gear 213, loosely mounted on the jack shaft, is enmeshed with a bevel .ar 214 carried on a worm shaft 215 (see ig. 9A), which is connected to the shaft of the motor 216.
  • a clutch 217 the ear 213 is put into driving connection witg the shaft 211 and the shaft is thus driven in one direction by the motor.
  • the shaft 211 I For the purpose of oscillating the shaft 211 I provide a.
  • the Worm gear is mounted on a shaft 221 which carries a crank 222 that is connected by a pitman 223 to a toothed segment 224, arranged to rock on an axis 225.
  • the segment meshes with a pinion 226 that is loosely mounted on the shaft 211 but which, when desired, is p'ut into driving connection with the shaft by a clutch 227.
  • the clutches 217 and 227 are operated selectively, oiie being,r opened and the other ⁇ dosed, and vice versa, by a lever 228 fulcrumed at 229.
  • This lever operates the clutch 217 directly and the Clutch 227 by means 0f a link 229 and a lever 230 'fulcrumed at 231.
  • the segment 224 rocks constantly whenever the motor is run ning and by shifting the lever 228 in one direction the clutch 227 is closed and the jack shaft oscillated while shifting it in the opposite direction closes the clutch 217 Sind causes the jack shaft to be driven constantly in one direction.
  • a timing gear 235 is keyed to the jack shalt 211 and meshes with a timing gear 236.
  • the shaft 237 is tubular and contains a shaft 239 which is connected to shaft 237 by a. spline that makes the shafts rotate as a unit-'but allows the inner one to move longitudinally.
  • a die roll .240, carried by the end of shaft 239, may pressed against the blank bv moving,r tht shaft 239endwise.
  • the shaft 239 is conn yted to a follower 241 by a thrust bearing 242 and the follower carries a roller 243 that is acted upon by a cam 244 similar to the cam 132 previously described.
  • the cam is carried on'a shaft 245 that is driven b v a shaft 246 through a spiral gear 247.
  • the shaft 246 carries a gear 248 which meshes with a gear 249 carried by a shaft 250, mounted in a bearing' 251.
  • the shaft 250 is driven throu h a telescopic shaft 252 and two universe joints 253 by a shaft 254 mounted to rotate in hearings 255.
  • Loosely mounted on shaft 254 are two bevel gears, 256 and 257, both of which are enmeshed with a beve-l gear 258 fixed to the worm gear shaft 221.
  • Each of the gears, 256 and 257 carries a clutch member which is adapted to ,cooperate with a clutch member 259 splined on the shaft 254.
  • the member 259 may be tion with reference to the cam 244 the same as roller 52 occupies with reference to the' cam 232 in Fig. 7. Wheuthe blank is in place the operator closes the Y clutch 22? which starts the machine to oscillating; and he also shifts the lever 260 to start the die advancing mechanism.
  • the numeral 210 is again used to indicate a pinion on which teeth are being rolled.
  • This pinion is seated in a rece formed in a stout conical block 2'2'5 that is bolted to a flange formed on the end of a shaft 276.
  • the recess is formed to receive the portion of the blank pinion adjacent to the base of its pitch cone, and it extends outward from the axis of the blank far enough to afford su port for all of the metal in the blank whicli is sub ⁇ ected to direct pressure from the die.
  • the purpose of clamping the blank in the recess or4 holder I provide a pull-rod 277 which asses longitudinally through the shaft an be forced cndwise in either direction by a hand wheel 278.
  • the end of the rod is arranged to act as an arbor for the blank and for this )urpose is preferablyY somewhat tapered. eyond the arbor the rod is threaded to receive a nut 279.
  • the rod is projected from the block 275 sufficiently to allow the blank to be pushed firmly on the arbor by the nut 279.
  • the hand wheel 278 is then rotated to draw the blank into the recess in the holder.
  • the bore ofthe blank is thus uite filled by the arbor and the body of the bizik is clamped between the nut and .the walls of the recess.
  • the nut and the threaded part of the arbor may be mutilated; that is, the threaded part oi the arbor may have two or three longitudinal channels cut in it which in the aggregate amount to about one half of the circumference of the rod, and similar channels cut. in the nut.
  • the nut can then be slipped on the rod until it is in Contact with the blank and the blank then clamped by turning the nut only a fraction of a revolution. This expedient being well known', it is deemed unnecessary to illustrate it.
  • the teeth on the blank are formed with a die roll 280 mounted on the end of a longitudinally movable shaft 281.
  • This shaft is carried by a tubular shaft 282 arranged to lilly rotate in bearings 283 carried by a member 284 corresponding to the superbase in Fig.
  • the shafts 281 snd282 are connected by.
  • a spline 285 'whereby they are made to rotate as a unit.
  • the timn gear 286 is secured to thet shaft 282 and mes es with a timing gear 287 secured to the shaft 276; these gears maintain a lined speed ratio between the blank and die while teeth are being rolled on the blank and it is evidently immaterial which shaft, 276 0r 2857., is the driver and which the driven. While the shafts are rotated the shaft.
  • Q81 is moved longitudinally toward the blank by the mechanism which has been previously described or any other suitable means.
  • shaft 276 is peculiarly appropriate in a ma.- chine designed for rolling Small pinions, where the pressure may be nearly perpendicular to the axis of the shaft.
  • the bearingr 29? is assumed to be bolted to the base of the machine: and in order that the blank holder 2) and timing gear Q8? may be readily changed to prepare the machine for rolling gears of various sizes the bearing 295 is split vertically. so that it can be removed Without disturbinf.,1r the shaft 276.
  • gears alone have been hereinbefore referred to, it is not to be understood that the field for my machines and the method they carry out is limited to gears.
  • Other rotary articles may be rolled by these machines by simply substituting a die of appropriate design; and there are other articles than gears which it would be advantageous to roll by the method I have described.
  • I may mention sprocket wheels. It is not necessary, even, that the die have teeth or other projections.
  • a. toothed die means for rolling a heated blank against said die, irst alternately in opposite directions and then continuously in one direction, and means for producing relative movement of approach between the die and blank.
  • a toothed die means for rolling a heated blank against said die, first alternately in opposite drec tions and then continuously in one direction, means for rodinzintq, relative movoment of approach etween the die and blank, and means for varying said movement of approach according to any predetermined scher ule relative to the velocity of rotation.
  • a gear rolling machine a toothed die, means for rolling a heated blank against said die, first alternately in opposite directions and then continuously in one direc ⁇ tion, and means for producing relative movement of approach between the die and blank during the alternating operating and discontinuing the mdvement of approach during at least part of the continuous roll- 4.
  • a gear rolling machine a toothed die, means 'for rolling a heated blank against said die, first 'alternately in opposite directions and then continuously in one direction at a different velocity than during the alternating operation, and means for producing relative movement of approach between the die and blank.
  • a toothed die means Ffor rolling a. heated blank against the die, first alternately in opposite directions at a speed be'st adapted to displace the metal and form teeth on the blank, and then continuously in one direi-tion at a Aspeed best adapted to tinish the surfaces of 'the teeth, and means for producing relative movement of approach between the die and blank during the tooth forming operation and such part of the finishingr operation as is desired.
  • a rotary toothed die means for rolling a heated gear blank against said die, first alternately in opposite directions at a relatively low veloclty and then continuously in one direc tion at increased velocity.
  • a gear rolling machine a rotary toothed die, means for rolling' said die and a heated blank together alternately in both directicms, ⁇ means for concurrently producing relative movement of approach between the die and blank, whereby to sink the die teeth into the blank and form teeth on the latter, and means for maintaining fixed velocity ratio between the die and blank durinlg the tooth forming operation;
  • a gear rolling machine a rotary toothed die, means for rolling said die and a heated blank together alternatelyy in both direct-ions and concurrently producing relative movement of ap roach whereby the die teeth are sunk into t e blank to form teeth thereon, and means for coordinating the rotary .motion with said movement of approach, so that one is proportional to the other.
  • a toothed die means for rolling a heated gear blank against the die alternately in both directions, rotating the blank approximately from one to three revolutions in each di rection, at the same time pressing the teeth of the die into the blank while maintaining fixed velocity ratio between the. die and blank, and means for following said alternate rolling by continuous rolling in one directionhrotating the blank thus a comparatively large number of revolutions.
  • a gear blank holder a shaft arranged to rotate in one direction, means driven by said shaft ⁇ for rotating the holder alternately in both directions, means also driven by said shaft for rotating the holder continuously in one direction, and means whereby one or the other of said means is put into operation.
  • a gear blank holder a shaft arranged torotate in one direction, means driven by said shaft for rotating the holder alternately in both directions, means also driven by said shaft for rotating the holder continuously in one direction, a manually operable lever whereby one or the other of said means is put into o eration.
  • a machine for rolling gears a gear blank holder, a shaft arranged to rotate in one direction, means driven by said Shaft. for rotating the holder alternately in both directions, means also driven, by said shaft for rotating the holder continuously in one direction, a manually operable lever whereby one or the other of said means is put into operation and means whereby putting either into operation before operation of the other is sus ended is prevented.
  • a machine for rolling gears a gear blank holder, a shaft arranged to rotate in one direction at uniform velocity, means operated by said shaft for rotating the holder alternately' in both directions. means also operated by said shaft for rotating the holder continuously in one direction at a different velocity than that at which it rotates when oscillating, and means where by one or the other of said means is put into operation.
  • a shaft arranged to rotate in one direction means driven by said shaft for rotating the die and holder alternately in both directions, means also driven by said shaft for rotating them continuously in one direction, and mechanism for producing relative movement of approach between the die and holder, said mechanism operat ing in time with the movement of the ditl and holder, so that the movement of ap proach is in accordance with the velocity of the die and holder.
  • a shaft arranged to rotate in one direction, means, driven by said shaft for rotating the die and holder alternately in both directions, means also driven by said shaft for rotating them continuousl in one direction, and mechanism for prof ucing relative movement of approach between the die and holder, comprising a cam which may be formed so that the movement of approach willy-have any desired characteristics, the rotation of said cam being timed to that of the die and holder so ⁇ that the movement of approach is modified in accordance 4with the velocity of the die and holder.
  • a shaft arranged to rotate in one direction, means driven by said shaft the die and holder alternately in both directions, means also driven by said shaft for rotating them continuously in one direction, and mechanism for producing relative movement of approach between the die and holder; said mechanism comprising a shaft which is oscillatcd or rotated contininusly in unison with the die and holder and at proportional velocity, a member that is required to 'rotate when said shaft rotates, but always forward, and means for so driving said member from said shaft.
  • a machine for rolling gears comprising a rotary toothed die, a blank holder. and timing mechanism whereby the die and holder are compelled to rotate at a fixed velocity ratio; a shaft arran ed to rotate in one direction. means driven y said shaft for rotating the die and holder alternately in both directions, means also driven by said shaft for rotating them continuously in one direction, audmechanism for producing,r relative movement: Vof approach between the die and holder; ⁇ said mechanism comprising a shaft which is oscillated or rot-ated continuously in unison with the die and holder,
  • a gear rolling machine comprising a rotary toothed die, a blank holder and timing mech". iism whereby the die ⁇ and holder are compelled to rotate at a fixed velocity ratio; a jack ,shaft arranged to rotate the die and holder, a main shaft which rota( es only in one direction, means for driving said jack shaft thereby through a clutch; means, also clutch controlled, whereby the main shaft oscillates the jack shaft, and a manually operable lever whereby to actuate the rluches selectively. so that the die and holder ma)- be oscillated, driven continu ously in one direction or stopped, at will.
  • a gear rollingI machine comprising a rotary toothed die, a blank bolder and timingr mechanism whereby the die and hold er are compelled to rotate at a fixed velocity ratio', a jack shaft arranged to rotate the die and holder, a main shaft adapted to rotate in one direction, a driving connection, including a clutch, for drivin the jack shaft from said main shaft in one direction, mechanism, also clutch controlled, for oscillating the jack shaft, rotating it approximately from one to three revolutions alternately in both directions at substantially lower speed than when it is rotated in one irection only; two separate clutch shifting devices, one to control the oscillatory and the other the continuous drive, a manually operable lever whereby either shifting device may be open ated and means for compelling either clutch to be thrown out before another can be thrown in.
  • a gear rolling machine comprising a rotary toothed die. a gear blank holder and mechanism whereby the die and holder are made to rotate at invariable velocity ratio; mechanism for producingr relative movement of approach between the die and holder, com arising a cam whereby said movement o approach is given the desired characteristics, said cam requiring rotation in one direction only.
  • a member whereby to rotate the die and holder, said membet being revoluble either alternately in both: direc tions or continuously in one direction, driving the die and blank accordingly; an anto- Inatic clutch whereby said member drives the cum when ii ⁇ rotates in the direction rotated by the cam, and a second automatic ntch and a reversing mechanism whereby huid member drives the cam when it rotates in the direction opposite to that rotated by the cam.
  • a lf jear rolling machine comprising a rotary toothed die ⁇ a gear blank holder and mechanism whereby the die and holder are made to rotate at invariable velocity ratio; mechanism for producing relative movement of approach between the die and holder, comprising a cam whereby said movement of approach is given the desired, characteristics, said cam requiring rotation in one direction onl a member whereby to rotate the die and holder, said member being revoluble either alternately in both di rections or continuously in one direction, driving the die and blank accordingly; an automatic friction clutch whereby said member drives the cam when it rotates in the direction required by the cam, and a second automatic friction clutch and a reversing mechanism whereby said member drives the cam when it rotates in the direction opposite to that required by the cam.
  • a gear rolling machine comprising a rotary toothed die, a gear blank holder and mechanism vwhereby the die and holder are made to rotate at invariable velocity ratio; a jack shaft connected to drive the die and holder, a main shaft, and mechanism whereby said main shaft rotating in one direction rotates the jack shaft alternately in both directions, rotating it approximately from one to three revolutions in each direction repeatedly and concurrently with said relative movement of approach.
  • a gear rolling machine comprising a rotary toothed die, a gear blank holder and mechanism whereby the die and holder are made to rotate at invariable velocity ratio; a shaft arranged to rotate in ore direction, two gears loose] mounted on said shaft, one of which is a apted to drive the die (gid holder in one direction and the other to ive them in the op site direction, a clutch whereby' to est ablis a driving connectio between each of the gears and said sha shifting mechanism for throwing the clutches in and out, a cam shaft driven by the aforesaid shaft, and cams thereon to operate the shifting mechanism and automatically throw the clutches in and out alternately.
  • aigear rolling machine comprising a rotary toothed die, agear blank holder and mechanism whereby the die and holder are made to rotate at invariable velocity ratio; two clutches, means for driving the die and blank in one direction when one of these clutches is closed and for driving them in the opposite direction when the other clutch is closed; automatic shifting mecha- ⁇ nism for closing said clutches alternately. said mechanism reopening each clutch be fore closing the other, and means for throw ing the shifting mechanism into and out of operation, with provision for opening either be closed when said clutch that happens to thrown ont of operation.
  • mechanism 1s 25 ln a machine for rolling gears, a holder for blanks, a die roll, a movable support for the die with power actuated means for moving said support to press the die teeth into a blank in the holder, and a, manloo ually actuated member to move the die support into engagement with the blank, enabling the operator to use the die for locating a partly finished blank in the holder. ⁇ 26.
  • a machine for rolling gears a rotatable blank holder, a die for rolling teeth on bevel gear blanks, said die being carried on the end of a revoluble shaft which 1s moved longitudinally to press the rotating die into aI blank carried by the rotating holder to form teeth thereon, and a manually operable lever whereby the shaft may be moved longitudinally though it is not rotating and the die used for locating a partly finished blank in the holder.
  • a holder for supporting a blank a toothed die adapted to roll teeth on a. bevel gear blank carried by the holder, and means for oscillating the die and holder and concurrently producing relative movement of a plroh therebetween to form teeth on t e 28.V
  • a holder for supporting a blank a toothe die adapted to roll teeth on a bevel gear blank carried by the holder, means for oscillating the die and holder and concurrently producing relative movement of approach therebetween, and means for maintaining fixed speed ratio between the die and holder.
  • a shaft In a machine for rolling bevel gears, a shaft, a blank holder carried by the end of said shaft, a timing gear secured to the shaft at a oint removable from the holder, and a bearing between the blank holder and timing gear for supporting the shaft; said blan holder having a recess adapted to receive and a'ord support for the portion of a bevel gear blank adjacent to the base of its itch cone.
  • rolling bevel gears carried by the end nut to screw on the arbor, whereby to force.
  • a gear rolling machine a die roll, a blank holder, a timing gear connected to said holder, a journal bearing between the timing gear and holder, and means for producing relative movement of ap roach between the die roll and blank hol er whereby to sink the die teeth into a blank in the holder and form teeth thereon, said movement of approach being rectilineal and at an angle to the axis of the blank less than 0e 33.
  • a die roll adapted to roll teeth on bevel gears
  • a blank holder adapted to support bevel gear blanks
  • a timing gear connected to the holder
  • a journal bearing between the blank holder and said gear
  • means for rolling a heated blank against the die first alternately in opposite directions and then continuously in one direction, and means for producing relative movement of approach between the die and blank.
  • a die means for rolling a heated rotary blank against the die, first alternately in opposite directions and then continuously in one direction, and means for producing relative movement of approach between the die and blank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Processing (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Tyre Moulding (AREA)
  • Press Drives And Press Lines (AREA)
US410866A 1920-09-17 1920-09-17 Apparatus for rolling gears by a new method Expired - Lifetime US1460528A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US410866A US1460528A (en) 1920-09-17 1920-09-17 Apparatus for rolling gears by a new method
GB24533/21A GB169173A (en) 1920-09-17 1921-09-15 Improvements in apparatus for rolling teeth on gears or the rim or periphery of metal wheels or discs
DEA36272D DE391080C (de) 1920-09-17 1921-09-16 Herstellung von ringfoermigen Koerpern, insbesondere von Zahnraedern, durch Walzen
FR544804D FR544804A (fr) 1920-09-17 1921-09-17 Machine pour le laminage des engrenages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US410866A US1460528A (en) 1920-09-17 1920-09-17 Apparatus for rolling gears by a new method

Publications (1)

Publication Number Publication Date
US1460528A true US1460528A (en) 1923-07-03

Family

ID=23626557

Family Applications (1)

Application Number Title Priority Date Filing Date
US410866A Expired - Lifetime US1460528A (en) 1920-09-17 1920-09-17 Apparatus for rolling gears by a new method

Country Status (4)

Country Link
US (1) US1460528A (fr)
DE (1) DE391080C (fr)
FR (1) FR544804A (fr)
GB (1) GB169173A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423932A (en) * 1944-12-15 1947-07-15 N H Weil Gear rolling machine
US3159062A (en) * 1962-06-04 1964-12-01 Lees Bradner Co Apparatus and method for forming helical gears or splines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245301B (de) * 1964-07-24 1967-07-27 Nii Technologii Awtomobilnoj P Einrichtung zum Erwaermen vor dem Walzen eines mit Verzahnung zu verschenden Kegelradrohlings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423932A (en) * 1944-12-15 1947-07-15 N H Weil Gear rolling machine
US3159062A (en) * 1962-06-04 1964-12-01 Lees Bradner Co Apparatus and method for forming helical gears or splines

Also Published As

Publication number Publication date
GB169173A (en) 1922-12-15
FR544804A (fr) 1922-09-30
DE391080C (de) 1924-02-27

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