US1584339A - Adjustable feed wheel for grinding machines - Google Patents

Description

May 11 1926. 1,584,339

H. WERNECKE ADJUSTABLE FEED WHEEL FOR GRINDING MACHINES Filed July 9, 1924 .30 3/ Ms ATTORNEY;

Patented May 11, 1926.

HENRY WERNECKE, OF CANTON,

OFFICE,

OHIO, ASSIGNOR TO THE TIIVIKEN ROLLER BEARING- GOMPANY, OF CANTON, OHIO, A CORPORATION OF OHIO.

ADJUSTABLE FEED WHEEL FOR GRINDING MACHINES.

Application filed July 9, 1924. Serial No. 725,014.

This invention relates to devices for ad justing the angular position of oscillatory shafts, such for instance as the feed-screw shaft of a grinding machine, wherein a cam actuated oscillatory feed-screw shaft is operatively connected with a rotary grinding wheel to move the same into and out of e11- gagement with the work. In such machines it is necessary to adjust the angular position of the oscillatory feed-screw shaft independently of its actuating cam so that the grinding wheel may be broughtint-o position to engage the work regardless of the diameter of the work or grinding wheeL.

The principal object of the present invention is to provide independent adjustments for securing either a coarse or fine adjustment of the angular position of the oscillatory feed-screw shaft relative to its actuating mechanism. Another object is to enable the angular position of the oscillatory feed-screw shaft to be adjusted a predetermined amount. Other objects are to provide for simplicity and cheapness of construction and compactness of design.

The invention consists in the improved adjusting device hereinafter shown and described; and it also consists in the parts and combinations of parts hereinafter described and claimed' In the. accompanying drawing, which forms part of this specification and wherein like symbols refer to like parts wherever they occur, 1

Fig. 1 is aside elevation of a grinding machine having a feed wheel provided with an adjusting device embodying my invention,

Fig. 2; is an enlarged'front elevation of the feed wheel and adjustingdevice therefor, p V Fig. 3- is a vertical section on the line 3-3 in Fig. 2, and j Fig.v 4 is a fragmentary vertical section on the line t4 in Fig.2,

Referring to the accompanying drawing, my invention is shown in connection with the feed-wheel; mechanism of aroll grind ing machine A. The roll grinding machine is of a well known. construction and it is considered unnecessary to illustrate it in detail. The feed member or wheel 10 is journaledon the outer end of the oscillatory feed-screw shaft 11 of the machine. The inner end of the feed-screw shaft 11 is op eratively connected, in any desired manner (not shown), with the rotary reciprocating grinding wheel carriage 12 of said grind- 111g machine in such manner as to cause its rectilinear reciprocation when said shaft is rotatably reciprocated. The carriage 12 rotatably supports a grinding wheel 12 and is reciprocated transversely of the work axis, to move said grinding wheel into and out of engagement with the work that is to be ground. The grinding machine is also provided with a continuously rotating cam 13 which is operatively connected with the feed-wheel 10 by means of a lever cam follower 14. One end of the lever 1 1 is pivotally secured to the feed-wheel 10, as at 15, and the other or free end of said lever is pivotally supported on the upper end of a link 16 whose lower end is pivotally connected to the frame of the machine The free end of the lever is provided with a cam roller which fits in the heart-shaped cam groove 17 in the cam, whereby rotation of the cam imparts an oscillatory or rocking movement to the feed-wheel 10. The feedwheel 10 is provided with an outwardly projecting annular flange 18, forming. a circular recess in which located a worm wheel 19, which is keyed or otherwise rigid ly secured to the end of the feed screw shaft 11. The worm wheel is provided with a handle 19 for manually rotating said wheel and the feed screw shaft 11. The front face of the worm wheel is graduated to give readings to .002 of aninch, the graduations being adapted to be brought into register with an index mark 18 on the front face of the feed wheel.

The upper portion of These lugs are-in alinement transversely of the axis of the feed-wheel 10 and are provided with alined grooves adapted to receive bearing blocks 22and 23. Thegrooves in the lugs 20 and 21 are closed by a cover plate 23 which bridges the space between said lugs and is removably secured in place by screws.

Journaled in. the bearing blocks 22, and 23 is a worm shaft 24 having a worm 25 thereon adapted to iutermesh with the worm wheel 19. The left-hand bearing block 22 that supports one end of the worm shaft 2 1 is pivotally secured in position within the groove or channel in the lefthand lug 20 of the feedthe feed-wheel or housing 10 is provided with a pair of outwheel 10 by means of oppositely disposed trunnion screws 26, which are threaded into the opposite sides of said lug and have end portions 27 of reduced diameter that fit within circular recesses provided therefor in the opposite sides of said bearing block and thus serve to pivotally support the same. By this arrangement, the worm 25 on the worm shaft 24 can be swung in directions transverse to the worm wheel axis to cause the worm to engage with or disengage from the worm wheel. The free end portion of the worm shaft extends beyond the right hand bearing block 23 and is provided with a knurled knob 28, whereby said worm shaft may be rotated and thus impart a rotary motion to the worm in the wheel and feed-screw when the worm and worm wheel are intermeshed. Endwise movement of the worm shaft in the bearing blocks 22 and is prevented by a collar 29 secured. to the pivoted end of said shaft and by the hub portion of the knurled knob fixed to the free end of the shaft.

Located in a circular recess or pocket in the bottom of the channel in the right-hand lug 21 of the feed-wheel 10 is a coilspring 30. This spring bears against the underside of the bearing block 23 that rotatably supports the free end portion of the worm shaft in the lug 21 and operates to swing the worm shaft outwardly away from the worm wheel and thus cause the worm to be disengaged from the worm wheel. The spring is held in proper position during the swinging movement of the worm shaft by means of a pin 31 which depends from the underside of the bearing block 23 and projects into said spring.

The worm and worm wheel are normally held in interineshed relation by means of a trigger 32 that is pivotally supported in a notch 33 at the top of one side wall of the lug 21, which supports the bearing block 23. The locking finger or detent 32 is normally held in engagement with the adjacent corner of the bearing block 23 by means of a coil spring 3a disposed crosswise of the channel in which said block is arranged. One end of the spring 3a is supported on the reduced inner end portion of a screw 35, which is threaded through one side of the lug 21 and the other end of said spring is supported on a lug or projection on the finger 32. By this arrangement, the worm on the worm shaft is normally held in engagement with the worm wheel fixed to the feed-screw shaft, and serves to secure together the feed-wheel and worm wheel, thereby forcing the feedwheel, the worm wheel and the feed-screw shaft to rock or oscillate together.

The hereinbefore described adjusting device serves to accurately regulate and limit the depth of the cut of the grinding wheel and compensate for the wear of said wheel by controlling the feed of the grinding wheel towards the work. hen a coarse adj ustment is desired, the trigger is released, thereby permitting the worm to be swung out of engagement with the worm wheel. The worm wheel feed-screw shaft may then be rotated independently of the feed-wheel and its actuating mechanism by means of the handle lflfiithereby causing the grinding wheel to move towards or away from the work. After this adjustment, the worm shaft is swung towards the feed-wheel until the bearing block at the free end thereof is locked beneath the trigger. After the initial adjustment of the feed-wheel by means of the handle 19 a fine or more accurate adjustment may be obtained by manipulating the knurled knob 28 on the worm shaft.

The principal advantages of the above described adjusting' device is that it permits an initial coarse adjustment to be readily made by disengaging the worm from the worm wheel and rotating the worm wheel by means of the handle thereon. A fine or more accurate adjustment can then be'obtained by retating the worm shaft while the worm thereon is engaged with the worm wheel. Another advantage is that the graduations on the outer face of the worm wheel permit the amount of adjustment to be noted by the operator. This feature is specially advantageous in the event that the work being delivered by the machine is of a size that is greater or less than the desiredsizeor in the event that a certain known thickness of material'is removed from the grinding wheel. In such event, the operator, by observing the graduations while manipulating the wormshaft, can shift the grinding wheel the distance necessary to obtain the desired cut.

Obviously, the hereinbefore described ad justing device admits of considerable modification without departing from the invention; therefore, I do not wish to be limited to the precise construction shown and described.

What I claim is:

1. The combination with the feed shaft of a grinding machine or the like, of a feed member journaled on said shaft, meansfor actuating said member, a gear fixed to said shaft, a manually rotatable shaft journaled on said feed member and having a gear thereon intermeshing with the gear on said feed shaft, said manually rotatable shaft being arranged for swinging movement about a point adjacent to one end thereof, whereby the gear thereon is adapted to he swung into and out of engagement with the gear on said shaft.

2. The combination with the feed-screw shaft of a grinding machine or the like of a feed wheel journaled on said shaft, said feedwheel being provided with an index mark,

means connected with said feed-wheel for imparting an oscillatory movement to said feed-wheel and said feed-screw shaft, a gear fixed to said shaft, and a manually rotatable shaft journaled in said feed-wheel and having a gear thereon interineshing with said gear on said feed screw shaft, said last-mentioned gear having graduations thereon adapted to register with the index mark on said feed wheel.

3. The combination with the feed-screw shaft of a grinding machine or the like of a feed-wheel journaled on said shaft, means connected with said feed-wheel for imparting an oscillatory movement to said feedwheel, a gear fixed to said shaft, a manually rotatable shaft mounted on said feed-wheel and having a gear thereon intermeshing with the gear on said feed-screw shaft, and means permitting said gear on said manually rotatable shaft to be disengaged from the gear on said feed-screw shaft without disturbing the mounting of said manually rotatable shaft. 7

4. The combination with the feed-screw shaft of a grinding machine or the like of a feed-wheel journaled on said shaft, means connected with said feed-wheel for imparting an oscillatory movement to said feedwheel, a worm wheel fixed to said shaft, a Worm shaft rotatably supported on said feedwheel and having a worm thereon adapted to mesh with said worm wheel, means permitting the worm on said worm shaft to be engaged with and disengaged from said worm wheel, and means for automatically locking said worm shaft in position with the worm thereon in engagement with said worm wheel.

5. A grinding machine comprising a feedscrew shaft, a feed-wheel journaled on said shaft, means connected with said feed-wheel for imparting an oscillatory movement to said feed-wheel, a worm wheel fixed to said shaft, a shaft having a worm thereon adapted to mesh with said worm wheel, bearing blocks for rotatably supporting portions of said worm shaft at opposite sides of said worm, one of said bearing blocks being pivotally supported on said feed-wheel to permit said worm shaft to be swung towards and away from said worm wheel and the other of said bearing blocks being slidably supported on said feed-wheel, and a springpressed locking finger pivoted on said feedwheel and adapted to engage said slidable bearing block and thereby hold said worm shaft in position with the worm thereon in engagement with said worm wheel.

Signed at Canton, Ohio, this 2nd day of July, 1924.

HENRY WERNECKE.

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