US1409208A

US1409208A - Grinding machine

Info

Publication number: US1409208A
Authority: US
Publication date: 1922-03-14
Anticipated expiration: 1939-03-14

Description

E. F. WIENEKE.

GRINDING MACHINE.

APPLICATION FILED JAN-18,1918- 1,409,208. Patented Mar. 14,1922.

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E, F. WlENEKE.

GRINDING MACHINE.

APPLICATION FILED 1AN.18,1918- Patented Mar- 14, 1922.

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v INVENTQR ATTORNEY E. F. ,WIENEKE.

GRINDING MACHINE. APPLICATION FILED IAN-18, 1918- 1,409,208, Patented Mar. 14, 1922.

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ATTORNEY GRINDING MACHINE. APPLICATION FILED LAN. 1-8, mm.

1,409,208. Patented Mar. 14, 1922.

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ATTORNEYv the two arms 10 ERIC r. WIENEKE, or DETROIT, MIcHIGaiv, AssiGn R To PACKARD PATENT FF- ce.

MOTOR OAR COMPANY, OF DETROIT, MICHIGAN, a conronnTion or MICHIGAN. v

GRINDING MACHINE.

Specification of Letters Patent.

Patented Mar. 14, 1922.

' 'Application filed January 1a, 1918. Serial No. 212,484.

To all whom it may concern-i Be it known that 1, ERIC F. WinNEKn, a citizen of the United States, and residing at Detroit, Vayne County, State of Michigan have invented certain new and useful Improvements in Grinding Machines of which the following is a specification.

This invention relates to grinding inachines and more particularly to such a machine for grinding clutch spiders.

The principal objects of the invention are to provide a machine which will simultaneously grind a plurality of surfaces; to

' provide amachine' which is entirely auto matic after being started; to provide asimple and positive indexing mechanism;

toprovidea novel means for actuating the indexing mechanism; and generally to improve this type of machine. and features oi? novelty will be apparent from the description taken in connection with the drawings in which:

Figure l isa side elevation of a machine constructed in accordance with the present invention, certain parts being broken away;

Figure 2 a front elevation of the head of the machine illustrating the arrangement (it-the tools amlthe means for driving the same- 1 lfiigure fil is a longitudinal elevation certain parts being broken away'andthe work support and means for reciprocating the same being shown in section; v

Figure 4i is a perspective view looking toward therear ot the work support with the cover thereof removed and showing the cams ior actuating the indexing mechanism;

Figure dis a sectional view taken substantially on the line 13%;? of Figure a portion of the locking disk being broken away to show the parts hidden thereby;

l ligurec is a sectional. plan view taken:

substa 'itiall on the line G--G of Figure 5. Referring to the drawings and more particularly to Figures 1 and 2. it will be'seen that the machine comprises base'A at one end of whichis the vertical column B (l at. the top having a head or tool support c thereof. A bracket D is secured to the column for vertical adjustment and carries a ciprocat-ing table E which (Ether objects transversely and extend toward the work support. Each of these' arms carries a bracket 11 which is mounted for adjustment toward and from the central vertical plane of the machine. For this purpose the arms are formed with the dove-tail slots 12 which receive the correspondingly shaped bases of.

ing driven by a belt 18 properly delivered to the same by the guide rollers 19 carried on a bracket 20 adjustably mounted in the support 21 projecting upwardly from the arm 10. The adjacent ends of the shafts l6 carry the grinding wheels 17' which as shown are truncated cones. It will be Observed that the axes ot the grinding wheels are inclined and symmetrically arranged with respect'to a vertical plane passing through the axis or the work and also that they are inclined with respect to each other. This machine is shown as arranged for grinding clutch spiders of the type used in multiple disk clutches. Such .a spider S is shown in Figures 1, 2 and 3; It has the radially projecting teath T which'have parallel sides 75. As clearly shown in Figure 2. the grinding wheels are arranged so asto simultaneously grind a side of each of a plurality of teeth. In this figure the two sides being ground are in one and the same plane, and consequently the inclination of the axes of the grinding wheels is such that the lowest elements of the conical surfaces of the wheels are parallel and in this case. one is the extension of the other. it will be apparent. however, that it a spider having a different arrangement of teeth were to be ground that it would be necessary to mount the grinding wheels in a different manner. Although two wheels only have.beerishown. a greater number might be used if desired. I I

The wheels are covered by the usual safety shields '22. which are supported by means of the brackets 23 Secured to one of the bearing arms .15. The brackets 11 may be held in adjusted position by any suitable locking means, the handle 24 being provided to actuate the same.

The table E is automatically reciprocated on the bracket D. The mechanism for accomplishin'g this includes a set of change speed gears 25 mounted a box; 26, secured to the side of the column B. These gears are driven by a pulley 27 which in turn is driven from a shaft 28, the latter being actuated a driving belt 29: which passes around tl iepulley 30 on the same. This belt 29 is properly guided to the pulley 30 by the guide pulleys 31, carried by the bracket 32 secured to the column of the machine. A box issecured to the side of the bracket D and has mounted therein the mechanism for reversing. the motion of the table. This mechanism includes a shaft 34 which is driven f om the gearing 25 by means of a telescopic shaft having universal joints 3,6 and 37 at its ends. The shaft 34 has a double clutch member 38 splinedto the same,

, and abevel gear 39 having a clutch member adapted to: cooperate with one end of the clutch member 38 is loosely mounted upon the shaft 34 and; in mesh with a bevel gear 40 mounted. on a shaft 41, extending transversely of; the bracket A. A similar bevel gear and clutch member 42 is arranged at the opposite end of the clutch member 38, is loosely mounted on the shaft 34 and meshes with the bevel gear 40. The clutch member 38 is of such length that when it is in engagement with the clutch of gear 39 it is out of engagement with the clutch of gear 42. Thus the gears 39 and 42 may be alternately connected to rotate with the shaft 34,

, and for: the purpose of actuating the clutch member 38 the table E is provided with the

adjustable tappets

43 and 43, which are at one end of its stroke, a tappet such as 43,

shown in Figure 1, will strike the projection 44,to.thereby carry the sleeve 45 to the right as. viewed in said figure pressing the spring 46 and moving the U-shaped bracket 47 to the right. As this latter-bracket has a fork 48 engaging the clutch member 38, the

clutch. member moves with the said bracket. Thus the gear 39 will be connected with the shaft 34 for rotation therewith and the bevel gear 40 and shaft 4]. will therefore be driven a, handle mounted on theprojecting end thereof. The upper end of the shaft 51 carries a pinion 56 which meshes with a rack 57 on, the bottom of the table. Consequently when. the pinion 56 is rotated the table E will be movedyin one direction or the other depending upon the direction of rotation of the pinion.

Mechanism is also provided for sliding the,

table E manually. This mechanism includes a sprocket wheel- 58 secured to the shaft 51 and adapted to be rotated by a chain 59 driven by a sprocket 60-mounted on thevertical shaft 61. This vertical shaft is rotated from a handle 62 by means of bevel gears-v 63'and'64. When it is desired toiadajust-the table E manually, the clutch 52 is thrown outof engagement with the worm wheel 50 so that the automatic or power actuation of the table is thus disconnected therefrom.

The work support includes a casing 65 and is mounted on the table E for longitudinal adjustment. For this purpose the table is formed with the longitudinal T slots .66

which receive the locking bolts 67 carried by the base of the work support F. The

casing 65 at the side facing the grinding wheels is formed with a hub or projected sleeve (38 and. the rear is closed by means of a cover plate 69 which has a central hub 70, the axisof which is aligned with the axis of the hub 68. An arbor 71 is rotatively mounted in the

hubs

68 and 70, and projects toward the grinding wheels, this end of the arbor being tapered as at 72 and formed,

with the key way 73 so that the clutch spider S may be mounted on the. said end and' securely held against rotation. In order to force the hub of the clutch spider on to the end 72 of the arbor, the arbor is made hollowand a rod 74 projects through the same, having a flange or washer 75 which engages the front end of the clutch spider. This flange is drawn toward the right as viewed in Fig ure 3 to force the spider onto the arbor-by means of a hand wheel 76 abutting the 0ppositeend of the arbor and threaded on the end of the rod 74. In setting up the work on the arbor of course it is necessary that the teeth of the spider be properly positioned with respect to the grinding wheels.

Toaccomplish this result a fin er 77 is pivoted on a rod 78 carried by t e casing 65.

enough so that it normallyswings the same into the position shown in said Figure 3. The rod-78 prO ects within the casing and at this latter end carries a guide roller 79 for a purpose which will be explained later. The arbor 71 has the collars 80 and 81 which engage opposite ends of the hub 68 to hold the arbor-against longitudinal movement.

The mechanism for indexing the work, that is rotating the clutch spider after each stroke of the table will now be described. The casing 65 is formed with an inwardly projecting flange 83 which is spaced from the cover 69. A wheel or disk 84 is secured to. the arbor for rotation therewith and its outer periphery fits the inside of the casing. A ring 85 is secured to the face of this wheel near the periphery thereof and in sliding engagement with the flange 83. This ring is formed with uniformly spaced notches 86 there being as many notches as there are teeth on the clutch spider. A plunger or latch 87 is normally spring pressed into one of the notches 86 so that the disk 84L and con sequently the arbor and spider are locked against rotation. The latch ,;87 therefore constitutes releasable means for holding the work against rotation. hen the work is indexed of course it is necessary to withdraw the latch 87 from engagement with the disk 84. The mechanism for doing this is best illustrated in Figures 3, 4L, 5 and 6. The bracket-D has anarni 88 arranged as shown in the drawings. Near its upper end this arm carries a stationary cam 89. A cam follower 90 is slidably mounted in the casing 65 and is normally spring pressed into engagement with the cam by means of a spring 91 This follower within the casing is formed with a wedge or inclined surface 92, which when the follower 90 is pushed inward acts on a pin 93 to swing the lever 94- toward the left as viewed in Figure 3. As the. lower end of'this lever 94: is connected with the latch .87 this motion will withdraw the latch from engagement with the disk .84. It will be observed as the cam 89 is stationary and the cam followeris carried by the casing; the movement of the work support actuates the means for holding the work against rotation to release the same.

For the purpose of rotating the work to index it. the arbor 71 within the casing carries a pinion 95 which is loosely mounted thereon and at one side thereof has the clutch pins 96 which are spring'pressed toward the right as viewed in FigureB and formed with beveled ends. These pins are adapted to engage with ratchet teeth on the side of a collar 97 secured tothe arbor for rotation therewith. It will thus be apparent that the pins and ratchet teeth constitute a clutch for, transmitting rotation to the arbor for one direction of rotation only of the pinion 95. In other words, this connection is what might be termed a one way clutch. Arranged above the cam 89 is another stationary cam 98 which actuates a follower 99 slidably carried in the bearingslOO andlOl of the casing. This follower 99 has an opposite end 102- within the casing, which is formed with the rack teeth 103 in mesh with the pinion 95. The upper side of the portion 102 is guided and the rack held in mesh with the pinion by means of the guide wheel 79 previously mentioned. As the cam 98 is stationary and the cam follower 99 is carried by the reciprocating work support, it will be seen that relative motion between these parts operates the pinion 95to index the work. Of course the cam 98 is shaped so that the pinion and workare rotated to be indexed only when the work has been withdrawn from engagement with the grinding-wheels. Furthermore, the cam 89 for releasing the locking device is shaped so that it operates the locking device to release the same before the indexing operation takes place.

In the operation of the machine the work having been set up on the arbor, the clutch 52 is thrown into engagement with the clutch member on the worm wheel 50 so that the table E is automatically reciprocated. As the table and the work are carried toward the grinding wheels the sides of a pair of teeth are simultaneously ground, this grinding operation continuing until the work on its return stroke has been withdrawn from the wheels. Just after the work leaves the grinding wheels on the return stroke the cam 89 causes the follower 90 to release the lock ing means which holds the work against rotation. Just after the locking means has been released the cam follower 99 is actuated by the portion 98 of the cam 98 so that the pinion 95 and the work are rotated through a predetermined angle to thereby index the same. On the return or feed stroke of the 116 table the latch 87 is permitted to engage one of the notches 86 when the cam follower 90 leaves the portion 89 of the stationary cam. Just after the work is thus locked against rotation the follower 99 is moved towards 120 the left as viewed in Figure 6 by the incline 98 on the cam to thus return the index operating parts to their original positions. The continued movement of the table E again carries the work to the grinding wheels and as the work has been indexed the sides of another pair of teeth will be ground.

Although a specific embodiment of the invention has been described it is apparent that the details thereof may be varied within the scope of the appended claims without departing from the spirit of the invention.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

the other wheel.

2. A grinding machine including in combination, a work support, a pair of frustoconical grinding wheels symmetrically disposed on opposite sides of: a plane passing through the axis of said support, the axis of each wheel being inclined relative to said plane, and an element in the grinding'sur face of one wheel being substantially in alignment with a corresponding element in the other wheel. V

A grinding machine including in combination, a work support, a pair of grinding wheels symmetrically disposed on opposite sides of a plane passing through the axis of said support, the axis of each: wheel being inclined relative to said plane, the wheels being shaped and arranged to grind surfaces on the work which lie in the same plane, and means for rotating said Wheels.

45. Ar grinding machine including in combination, a support for a ylindrical piece of work having parallel sided radial teeth, a plurality of grinding wheels mounted in position to simutaneously grind a side of each of the teeth located substantially at the opposite ends of a diameter of the work, means for rotating the wheels'and means for feeding the work to and from the wheels.

5-. A grinding machine including in combination, a support for a cylindrical piece of work having radial teeth, a plurality of grinding wheels, mounted in position to simultaneously grind a side of each of the teeth located substantially at the opposite ends of a diameter of the work, means for rotating the wheels, means for feeding the work to and from the wheels in a path substantially parallel to the axis of the work,-and means for indexing the work when it is retracted from the wheels 6. A grinding machine including in combination, a support for a cylindrical piece of work having radial. teeth. a plurality of grinding wheels mounted in position to S1 multaneously, grind a side of each of a plurality of teeth, means for rotating the wheels, means for feeding the work to and from the wheels in a path substantially parallel to the axis of the work, and means actuated by said feeding movement for rotating, the work through a. predetermined angle when, it is retracted from' the wheels.

wheels, means for feedingthe work to and" from the wheels, and means actuated by saidfeeding movement for indexing the" work: when it is retracted from the wheels including a stat onary cam.

S. A grinding machine including in combination, a work support, a support having a plurality of grinding wheels, means for. moving one of said supports to and from the other whereby the wheels simultanee ously grind a plurality of surfaces on the work, means actuated by the movement of said movable support to turn the work and wheels one relative to the other to" bring. the parts into position to grind other sur faces, and means locking the work against rotation while the wheelsare operative thereon. Y i

9. A metal working machine including in combination, a support for the work, means for reciprocating said support. in a path parallel to its axis, means actuated by the movement of said support for indexing the work at one end of its stroke, and means locking the work against rotation except when being indexed.

10. A metal working machine including in combination, asupport for the work,

means for reciprocating said support in a path parallel to its axis, and means actua'md by the movement of sald support for index ing the work atone end of its stroke, in

eluding a stationary cam.

11. A metal working machine including ice in combination, a support for the ork,

means for reciprocating said support,meansfor indexing the work at one end' of its stroke, and means for locking the work against rotation'during the remainder of its reciprocation.

12. A metal working machine including in combination, a support for the work, means for reciprocating said support, means for indexing the work atone end of its stroke actuated by the reciprocating movement, and means for locking the work against rotatlon durlng the remainder-of lts I reciprocation.

13. A metalworking machine including,

in combination, a support for the work,

7 means for reciprocating said support, means for indexing the work at one end of its stroke, releasable. locking means normally ,for indexing the work at one end of its stroke, releasable locking means normally holding the work against rotation and means actuated by the reciprocating movement for releasing the said locking means while the indexing means is operative.

15. A metal working machine including in combination, a support for the work, means for reciprocating said support, means for indexing the work at one end of its stroke actuated by the reciprocating movement, leasable locking means normally holding the work against rotation and means for releasing the said locking means while the indexing means is operative.

16. A metal working machine including in combination, a support for the work, means for reciprocating said support, means for indexing the work at one end of its stroke actuated by the reciprocating movement, releasable locking means normally holding the work against rotation and means also actuated by the reciprocating movement for releasing the said locking means while the indexing means is operative.

17. A metal working-machine including in combination a tool support including an arbor, a work support, means for reciprocating one of said supports relative to the other in a path substantially parallel to the axis of said arbor and means for indexing the work actuated by the movement of said reciprocating support.

18. A metal working machine including in combination, a tool support, a work support, means for reciprocating one of said supports relative to the other, and means for indexing the work actuated by movement of said reciprocating support including a stationary cam.

19. A metal working machine including in combination, a tool support, a work support, means for reciprocating one of said supports relative to the other, means for indexing the work actuated by movement of said reciprocating support, releasable locking means normally holding the work against rotation and means for releasing the said-locking means while the indexing mechanism is operative.

20. A metal working machine including in combination, a slidably mounted carriage, a work arbor rotatably mounted on the carriage, means for reciprocating the carriage, releasable locking means normally holding the arbor against rotation, means operated by the movement of the carriage to rotate the arbor through a predetermined angle at the end of each reciprocation, and means for releasing the locking means while the arbor is rotated.

21. A metal Working machine including in combination, a slidably mounted carriage, a work arbor rotatably mounted on the carriage, means for reciprocating the carriage, a latch to lock the arbor against rotation, means for rotating the arbor through a predetermined angle once for each reciprocation, and means for retracting the latch when the arbor is rotated.

22. A metal working machine including in combination, a slidably mounted carriage, a work arbor rotatably mounted on the carriage, means for reciprocating the carriage, a latch to lock the arbor against rotation, means for rotating the arbor through a predetermined angle once for each reciproca tion, and means for retracting the latch when the arbor is rotated including stationary cam.

23. A metal working machine including in combination, a rotatably mounted work-support, and means for intermittently rotating said support including a cam, a follower for the cam, and a connection between the follower and support adapted to transmit movement to the support in one direction only.

24:. A metal working machine including in combination, a rotatably mounted work support, releasable locking means to hold the support against rotation, a cam, a follower for the cam, a connection between the follower and support adapted to transmit m0vement to the support in one direction only, and means to release thesaid locking means when the support is rotated.

25. A metal working machine including in combination, a slidable carriage, a work support rotatably mounted in said carriage, means for reciprocating said carriage, a stationary cam, a cam follower carried by the carriage, and means for rotating said support actuated by movement of the follower in one direction only.

26. A metal working machine including in combination, a slidable carriage, a work support rotatably mounted in said carriage, means for reciprocating said carriage, a stationary cam, a cam follower carried by the carriage having rack teeth, a pinion meshing with said teeth loosely mounted on the work support, and a one way clutch operatively interposed between the pinion and support.

27. A metal working machine including in combination, a slidable carriage, a work support rotatably mounted in said carriage, means for intermittingly rotating said support, releasable locking means normally holding the support against rotation, and means for releasing said locking means when the support is rotated including a cam, a cam follower, and connections between the follower and locking means.

28. A metal working machine including in combination, a slidable carriage, a work support rotat-abl y mounted in said carriage,

- means for intermittingly rotating said sup- 29. A metal working machine including" in combination, a rotatable arbor, means for intermittently rotating said arbor, releasable locking means for normally holding said arbor against rotation including a ring rotatable with said arbor and a latch engaging said ring; and means for retracting said latch when the arbor is rotated.

30. A metal working machine including in combination, a rotatable work arbor, means for intermittently rotating said arbor, releasable locking means for normally holding said arbor against rotation including a ring rotatable with said arbor, and a latch engaging said ring; and means for retracting said latch when the arbor is rotated including a cam.

'31. A metal working machine including in combination, a slidable carriage, means for reciprocating said carriage, a rotatable work arbor mounted on said carriage, means for intermittently rotating said arbor, releasable locking means for normally holding said arbor against rotation including a ring rotatable with said arbor and a latch engaging said ring; means for retracting said latch when the arbor is rotated including a stationary cam and a cam follower carried by the carriage.

32. In a metal workingmachine, in combination, a reciprocating work support, means to index the work at one end of its stroke including acam disposed at the side or the path of said support, releasable locking means normall holding the work against rotation, and means to relase said locking means while the work is being indexed including a second cam disposed at the side of the path of said support.

38. In a metal working machine, in combination, a table, a work support reciprocable on said table, and meansto index the work at one end of its stroke including a cam carried by said table.

34:. In a metal working machine, in co'mbination, a table, a work support reeiprocable on said table, means ,to' index the work at one end of its stroke, releasable looking means normally holding the work against rotation, and means torelease said locking means at the indexing end of the stroke otthe work including a cam car ried by said table.

In testimony whereof: I ailix my signature.

ERIC F. WIENEKE.