US2453573A - Grinder machine - Google Patents

Description

Nov. 9, w48. E. F. HAGER GRINDER MACHINE Filed Feb. 2, 1945 2 Sheets-Sheet l www T4 N MH R wf. m 1M A m E. F. HAGER GRINDER MACHINE 2 Sheets-Sheet 2 Filed Feb. 2, 1945 Patented Nov. 9, 1948 yfUlNfr'reD STATES PATENT l GRINDER MACHINE Em'il F. Hager, Queens Village, N. Y. ppli'cauon February 2, 1945, serial No. `575,749

This invention rela-tes to work grinding and dressing machines and lmore particularly to a machine having afspin'dle Afor driving a pair of grinding `'and dressing elements, and a support for holding "a tool :brother work at desired angles fformovem'ent relative to said elements.

IIt has `been the practice heretofore `to lprovide a work support adjustable along a guide bar Another object ofthe invention istorfprovide an l improved grinding and dressing machine having a work support guidi-ng bar disposed outside the `zone of flying particles producedby the vgrinding and dressing operations, l

rStill another object of vthe 'invention is to provide an improved work support for grindingand dressing machines capable `of Various angular adjustments -and/ or movements.

A 4further object `of the invention includes the provision of -a special mountfor the vgrinding and dressing elements Aso that the hubv of the spindle does rnot `protrude `out [beyond the radial working face of the wheels; an easily removable guard for the grinding and lapping wheels; Aand-a bearing arrangement 4for the spindle which is easily adjusted to `remove end play.

-Ihe above and other objects `of the invention vwill #become more clearly understood from the `following detailed descriptiontfo be read .in connection with the accompanying drawings` -ln which:

16 Claims. (C1. 51-125) f Fig. l1 'is 4a `plan -viewof a work grindingand dressing machine accor-ding to A this invention;

Fig.. 2 is a fragmentary View in front elevation with parts in section of fthe grinder machine showing the Work support adjacent one of the grinder elements; l

` Fig. .3 `is a sectional View taken substantially along linei3-3fofFig.-1; v Fig. i .is a cross sectional view taken substantial-ly alongline-ll of Fig. 3; Y l

Fig. 5 is `a cross sectional view of a modiiied track structure for the work support; and

.-Fig. 6 is a view-in side -ele'vation of ajwork sup- ,porting table. y

Referring to Figs. l, 2` and 3 of the drawings la] i ba'se il is shown with an opening 2 defined `by ya iiange 3 upon which is mounted a grinderY head I4. The head 1i includes a hollow stand .5 having bearings 'such as indicated at 6 to support ya spindle 1. Each bearing is held in position by a clamp 8; Fig. 3, which when loosened permits the taking up of slack i-n the bearingst, the clamp thereafter being tightened. The spindle 1 supe ports'fr rotation,` grinding and dressing `wheel elements `9 `and 9a `preferably of the character having working surfaces on the` `sides thereof. Each Wheel Yelement is partially covered with a :guard lll. A liquid lvcirculatingsystem Il directs cooling and cleaning liquid onto the Working surfaces l2 `ofeaolri of the elements Band 9u.

The `base Il includes an upturned `marginal riiange i3 to lprovide a catch basin for the liquid and cuttings during grinding and dressing operations, the liquid and cuttings being removed by drain 'HL Mounted outsidethe Vbasin on arms l5 `is a guiding bar :I6 for a carriage i7 which supportsfa work 'holding post I8. The carriage is adjustable along the bar I6 and may be locked thereto in any ydesirable position by means of lockingscrew I9. l

The bar t6 isdisposed parallelto the spindle "l. The frame of the 4carriage Il is triangular` as viewed in plan, Fig. .1, and two cornersthereof -a'reA provided with bearing `elements 20 and `2| which receive the bar i6 vto guide the carriage 'alonga true line parallel to the spindle L To- Ward the apex of the carriage is a dependingleg 22 provided with a roller 23 which tracks upon amachine'd surface 2d` on the base l; i

lfrdesired, the track surface 24 may be raised `as indicated at `25, Fig. 5. The roller 23 may also be `replaced by sliding surfaces such as provided by `the `rod 26 and the curved foot member `2'l. -AStill yother movable supporting and track rar'- -rangernentsmam of course, be employed.

=As shown inFig. 4 the apex `of the carriage `I'l is provided with tWo spaced support elements "-28 and 29 onto 4which a rock member 30 is mounted for-rocking `and sliding `movements as more particularly `described hereinafter. The rock member in `turn .-pivotally supports a Ipost 3l. The post 3| is preferably supported with its long-is tudinal axis fdisposed transverse to the axis of the rockmember 3Q. The member 3D is provided with atubular socket ,32 for reception ofthe lower end -of the :post 3l, the .post being locked in position by lock screw 33. .f On the socket 32 is keyed Aa calibrated dial 34- over whichis -disposed a pointer 35 keyed tothe post 3l. Thisprovides l oFFIcE `an angular indication of the adjusted position of vided with two legs 4| and 42 which straddle the end of the post 3|, the leg 42 being provided with a lock screw 43 for securing the clamp inthe desired angular position.

From the foregoing description it is clear that the post 3| may be adjusted to any desired angular position about its longitudinal axis and the clamp 38 may be adjustable about an axis transverse to the longitudinal axis of the post 3|. It will now be described how the post is made adjustable along an axis transverse to the longitudinal axis, or in other words, parallel to the axis of the spindle 1. It will also be described how this mounting provides for rocking movementof the post 3| toward and away from the spindle 1 so as to provide movement ofthe Work being shaped relative to the surface I2 of the grinding element 9.

As vshown in Fig. 4 a trunnion .sleeve 45 is held by screw 49h in support element 28 with a pusher pin 45 extending therethrough. The member 30 is locked to the trunnion 45 by a lock screw 41. A second trunnion48 is held in position in the element 29 by a set screw 49a, Fig. 3. Disposed in the trunnion 4B is a retraction spring 49 the outer end of which carries a thrust pin 5D. Mounted in opposite ends of the member 30 are two thrust caps 5| and 52 having thrust points engaging pusher rod 46 and thrust pin 59 respectively. The inner end of the pusher rod 43 is engaged by a pin 53 held by crank 54 (see Fig. 3) carried by shaft 55. A second crank arm 56 is secured to the shaft 55 which is engaged by a connecting pin 51 controlled by adjustment screw 58. This screw is preferably provided with calibrations by which the extent of adjustments can be readily determined with respect to a stationary pin disposed closely adjacent thereto.

By adjusting the screw '58 the crank arm 55 is forced to the right as viewed in Figs. 2 and 4 thereby causing the pin 53 to actuate pusher rod 46 to the right. The pusher rod carries with it the member 35 thereby moving the post in a direction parallel to the axis of the spindle 1; This movement of the member 3B compresses spring 49. Retraction of the adjustment screw 58 permits the spring 49 to return the member 30 to the left maintaining the pusher rod 4B against the pin 53. It will thus be apparent that by adjusting the screw 58 forward and backward the member 30 is moved lengthwise of trunnions 45 and 48, relative to the carriage I1.

The rock member 30 when unlocked by releasing lock screw 41 is rotatable about the trunnions 45 and 48. This provides spaced bearing surfaces at 60, 60a for the member 30 thereby enabling the operator to rock the member 30 and the work supporting post 3| carried thereby about the axis of the trunnions 45, 48. In order to limit the rocking movement of the member 3D the member is provided with a stop lug 3| secured thereto by lock screw 62, the lug 6| being engageable with a stop pin 53 adjustabiy supported by set screw 64 on a projection 65 of the carriage |1.

The adjustment provisions for post 3| and clamp 38 permit the positioning of the work such as tools at various predeterminable angles relative to the surfaces i2 of the work shaping elements 9 and 9a. By manipulating adjustment screw 58, the work may be moved into the cutting surface l2 while rocking the work to and fro across the face of the surface I2.

In Fig. 6 Tshcw a worksupporting table 38a which may be substituted for the work supporting clamp 38, the table beingwadjustable to desired angles for free hand grinding and lapping operations. The base portions of the clamp and the `table are identical as indicated by the like reference characters applied thereto in Figs. 3 and 6 respectively.

Another feature of the invention is the unique mounting arrangement` for the grinding and lapping wheels. As shown in Fig. 2 the wheel 9a is supported on a anged collar 55 the inner edge of which is urged against the bearing assembly 6. The collar has a radially extended flange 81 having threaded openings 58 for reception of the threaded portions of bolts 69. The collar is held upon the spindle`1 by a circular nutlike element 1D threadably received on the threaded end 1| of the spindle, The wheel 9 or 9a, asthe case may be, is received on the collar against the iiange 61. The wheel is provided with openings aligned with openings 58 for reception of bolts 69. A ring 12 is provided with openings also aligned with openings 68 for reception of bolt 69 whereby the wheel istightly secured in position. By this arrangement the wheel is supported at the very end of the spindle Without appreciable extension beyond the plane of the radial working face l2 of the wheel. This arrangement also providesfor quick removal and replacement of wheels without changing the position of the collar 6B and nut 10 or altering the end play adjustment of bearing arrangement 6.

As previously stated the outer housing 13 of the bearing 6 is engagedand held in position within the grinder head by clamp 8. The spindle 1 Vis provided with ashoulder 14 against which the inner ball bearing race 15 is heldby sleeve 16, collarY 66 and nut 10. The outer race 11 is held by the housing 13 to which packing ring 19 is threaded. It will be clear that any end play in the ball bearing arrangement may be removed by loosening the clamp 8 at 18, Fig. 3, and urging the ring 19 and housing 13 to the right as viewed in Fig. 2. This forces the outer race 11 to the right relative to inner race 15 which abuts against shoulder 14. Since the bearings at the opposite ends of spindle 1 are identical, objectionable end play in both bearings Ais removed by this one operation, the clamp on the opposite bearing being maintained in tight position so that the force acting through spindle 1 also tightens the opposite bearing at the same time. 4The loosened clamp 8, of' course, is tightened While the bearings are thus urged into the desired relation. Once this adjustment is made, removal and replacement of the wheels 9 and 9a will not alter the adjustment, since as is easily seen, the wheel mounts are independent of the bearing assemblies.

rihe guard I8, according to this invention, may be provided with straight sidewalls `which cover substantially al1 of the wheel except fora small portion at the front side of the grinder. The guard is secured on the grinder head by two bolts 8f3, Fig. 2, and 8|, Fig. 3. When these bolts are removed the guard may be removed or lifted from the wheel. This enables the guard to be easily replaced by other guardssiich as .those more fully open in front foru'se in conjunction with radius .lapping attachments, for example.

Attention is called to the fact ,that the grinder head comprises a minimum ,of partseasily assembled and adjusted. ATheistandarcl `"is cast in one piece and the bore for the bearings 6 and spindle 1 is machined in `one operatin."-The "system,

-While `I have shown and described the princi- .ples off my invention in connection with spe lic "apparatus will be understood that such showing is intended to be illustrative ofthe'inven-tion only and not as limiting fthe scope "of the invention as set forth inthe .objects and appended claims. TI claim:

1. In a work shaping apparatus having a spindle and work shaping means carried by said` spindle, a bar disposed parallel to said spindle, a carriage mounted at least in part` on said bar for movement in directions parallel to said spindle, a member carried by said carriage with a given axis thereof disposed at an angle to the axis of said spindle, means on said carriage for moving said member relative to said carriage in directions parallel to said spindle, means for pivotally adjusting said member about said given axis, a work supporting means carried by said member, and means for pivotally adjusting said work supporting means about an axis transverse to said given axis.

2. In a work shaping -apparatus having a spindle and work shaping `means carried by the spindle, a carriage, means for moving said carriage for coarse adjustment parallel to said spindle, a work supporting member on said carriage, i

a lever pivoted on said carriage and a threaded element to actuate said lever to move said member for nne adjustment relative to said carriage and `in a direction also parallel to said spindle,

and a pivoted support for rockably supporting said member on said carriage about an axis parallel to said spindle.

3. In a work shaping apparatus having a grinder head provided with a spindle and at least one grinder wheel, and means to apply liquid to said wheel, abase disposed below said grinder head and having an upturned marginal flange to catch liquid and cuttings during grinder operations, a carriage a bar horizontally disposed outside the confines of said ange, means providing a track Within said marginal flange, and said carriage having means for engaging said bar and said track to guide and support said carriage for movement in direction parallel to said spindle.

4. In a work shaping apparatus having a grinder head provided with a spindle and at least one grinder wheel, a base disposed below said grinder head, said base having an upturned marginal flange to form a basin, a carriage, a bar horizontally disposed outside the connes of said flange for guiding said carriage for movement in directions parallel to said spindle, and means providing a track on said base Within the connes of said ange, and means on said carriage for engaging said bar and said track.

5. An apparatus according to claim 4 further including a work supporting post, means on said carriage pivotally supporting said post for move- :ment shone exis ef spi-nele In Weissweine snneseinshevine .s grinder need .presided i .n @spindle end ai leest ene erineerrrheelfehsse `slsresed nelsw sei-e1 grinder need, said has@ having .en nninrned nenes; is `ferin s besinefber distese@ alone one side ef seid basin, `ineens .prei/.inline e sneek inseid'besn parallel te .seid red, e @err es fel" movement .a ber horizontaliydisnesed ediecens s neit sf .seid

upturned apgameans providing a track in said basin parallel to said bar, a carriage, and means to support and guide said carriage on said bar and said track.

8. Apparatus according to claim '7, wherein said bar is located on said base beyond said upturned flange so that the carriage overlies said flange between said bar and said track.

9. Apparatus according to claim '7, wherein said track comprises a bar mounted within said basin and said carriage includes a bearing element adapted to engage the bar of said track.

10. A work support comprising a base having a pair of spaced support elements, a hollow trunnion carried by each of said elements, a rod extending-through one of said trunnions, a spring disposed in the other of said trunnions, a rock member carried by said trunnions for rocking movement thereon, thrust elements carried by said rock member, one to engage said rod and the other to engage said spring in opposed directions,` and means for moving said rod to adjust said rock member lengthwise of said trunnions, said spring operating to hold said member against said rod.

11. A work support comprising a base having a pair of hollow trunnions, a. rock memberI carried by said trunnions for rocking movement `thereon,` a rod extending through one of said trunnions for engagement with said rock member, a spring` disposed in the other of said trunnions to urge said member against said rod, and means for moving said rod to adjust said rock member lengthwise of said trunnions.

l2. A Work `support according to claim l1 and means adjustable to limit the rocking movement of said rock member.

13. A Work support according to claim 1l wherein said means for moving said rod includes a leverage arrangement and an adjustment screw by which fine adjustment isobtainable.

14. A work support according to claim l1 wherein said adjustment screw is provided with calibrations and said base is provided with a pin disposed closely adjacent to said screw to provide a reference point for determination of the extent of the adjustment.

15. In a work shaping apparatus having a spindle and a work shaping means carried by said spindle, a carriage movable in a direction parallel to the axis of said spindle, a rock member,

bearing means on said carriage to support said member for rocking movement, means to effect adjustment of said rook member lengthwise of its bearing support, a post, said rook member having a socket for pivotally supporting said post, means on said rocking member and said post to indicate the angular relation thereof, the upper end of said post having a pin disposed transversely thereof, a Work support havingv a pair of apertured legs to receive said pin, means to lock said Work support to said pin, and means on said pin and said Work support to indicate -the'angular relation thereof.

16. In a Work shaping apparatus having a spindle and a work shaping means carried by said spindle, a carriage movable in a direction parallel to the'aXis of said spindle, a rook member, bearing means on said carriage to support said member for rocking movement, a post, said rock member having a socket for pivotally supporting said post, the upper end of said postl having a pin disposed transversely thereof, a Work support having a pair of apertured legs to receive said pin, and means to lock said Work support to said pin.

\ I EMIL F. HAGER.

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

' `UNITED STATES PATENTS Number Name Date Kampfe June A'7, 1887 Hartley Oct. 15, 1895 Boys June 18, 190.1 Lomasney May 12,I 1903 Martin Oct, 15, 1912 Heryngfel May 10, 1921 Muehlhauser Mar. 13, 1923 Delaval-Crow Aug. 22, 1933 Kasch Mar. 8, 1938 Zwiok Jan, 17, 1939 Wagner et a1 Sept. 19, 1939 Kuzmick Jan. 16, 1940 Blood Feb. 18, 1941 Thomason Mar. 28, 1944 Green June 13, 1944

Images