US1863042A - Grinding device - Google Patents

Description

.June 14, 1932. W, FLOSS 1,863,042

. GRINDING DEVICE Filed Jan. 25, 1928 fjZ attenua? 5 Patented June 14, 1932 'HPATENr OFFICE CARL W. FLOSS, OF DETROIT, MICHGAN Gamme DEVICE Application filed January 23, 1928. 'Serial No. 248,782.

This invention relates to lapping or grinding devices more particularly' adapted. for finishing or grinding cylindrical or substantially cylindrical apertures and has as its objects to simplify, render more eicient and improve generally devices of this character.

Another object of this invention is to provide a device of the character described in which the control means for the abrasive members has no positive or fixed connection with the abrasive members but is free to move axially of the device within certain l limits whereby Athe stones may float and adjust themselves to lit a tapered wall or to compensate for -uneven wear upon the stones while maintaining a uniform pressure throughout the length of the abrading members.

Still'anotherrobject of this invention is to provide a grinding or lapping device in which the driving means therefor is connected thereto at substantially the longitudinal center of the device and in such a manner as to permit of a universal movement between the parts. Many advantages are obtained from a construction of this character, not the least of which is the advantage that such a construction eliminates the possibility of any irregular side thrusts being imparted tothe device thus tending to produce a straight hole 'with parallel sides.

Many other objects, advantages and novel details of construction of this invention will be made more apparent as this description proceeds, especially when considered in conf' Referring now particularly to the drawing wherein like reference characters indicate like parts it will be noted that the ldeviceconslsts essentially of a body or head indicated generally by the reference character 10, this body being formed with a plu- 56 rality of longitudinally extending circumferentially spaced slots or recesses 11 extending radially of the body '10 and opening into the outer surface thereof.

Located in each recess 11 is a stone holder 60 12 carrying a grinding stone or abrasive-ele' ment 13. The depth of each recess 11 is so selected with reference to the corresponding stone holder 12 that the abrasive elements are lcapable of radial movement when adjusted 03 by mechanism yet to be referred to. A shouldered portion 14 of each stone holder engages a correspondingly shaped portion 15 of the body v10 so as to provide a positive driving connection between the body and 7 each stone holder. The thrust on the abrasive elements in a axial direction of the device is taken up by means ofpins 16 passed transversely through the stone holders and engaging the end faces of the body 10.

The back of each stone holder at the longitudinal center thereof is formed with a surface 17 substantially parallel with Ithe axis of the device while the back or rear surface of each stone holder adjacent the ends there- 5 of is provided with a vtapered or inclined surface 18. Engaging these inclined or tapered surfaces 18l are upper and lower adjusting members 19 and 20 provided with semi-spherical or curved surfaces 21. The upper adjusting member 19r is slidably mounted upon an arbo;l or sleeve 22 and the lower adjusting member 20 is rigidly secured to the lower ends of rods or struts 23 which pass freely through passages 24. The upper ends of the rods 23 are rigidly secured to the lower end of sleeve 22 as for instance by being threadedl into a flange 25 Icarried by the saidf sleeve. The sleeve 22is exteriorly threaded for'engagement by an adjusting nut, 26 which actuates the upper ad justing member 19 through the intermediary. of a spacer sleeve 27. By reason of this construction it will be apparent that the adjusting members 19 and 20 may be moved relative to one another and by reason of their engagement with the inclined or tapering surfaces 18 of the stone holders the stone holders will have imparted thereto a radial adjustment corresponding to the extent of relative movement of the ' members 19 and 20.

In this connection it should be noted that the adjusting members 19 and 2O provide a positive backing or support for the stone holders to limit the inwardradial movement thereof so that these stone 'holders may be accurately adjusted to the desired diameter. Furthermore the adjusting members 19 and 20 and the supporting means therefor are all free to move axially of the device relative to the stone holders l2 or the body l() of the device whereby the abrasive elements can readily adjust themselves to fit a tapered wall and may also adjust themselves to compensate for uneven stone wear The drive shaft 28 which may be connected in any desired manner toany suitable source of power extends loosely through an enlarged bore 29 in sleeve 22 and into an enlarged bore 30 f formed centrally ofthe body 10 The drive shaft 28 is -provided at its lower end with a semi-spherical portion 31 formed with a transversely extending hole or aperture 32.

`A drive pin 33 extends through aperture 32 and fits tightly in recesses or apertures 34 formed in the body 10. AThe aperture 32 tapers from a point coincident with the center of drive shaft 28A outwardly towaid the ends thereof thus providing clearance between the drive shaft and pin 33 to permit of a relative rocking movement between the drive shaft 28 and body 10. It will also be apparent that the drive shaft 28 may rock about pin 33 at right angles to its other movement just described so that in effect drive shaft 28 is universally connected to body 10 so ythat the advantages of such a connection as hereinbefore pointed out may be realized.

While any desired meansof normally urging and holding the stone holders in engagein many of the essential and all of the non essential details of construction may be resorted to without departing from the spirit and sco e of this invention and to this end reservation is made to make such changes as rality of'abrasive members, a Abody upon asesoria which said members are mounted for radial movement located substantially centrally of f said members, adjustin'gfelements for said abrasive members spaced respectively from the ends of said body and supported independently thereof and a driving shaft extending through one of said elements and driving shaft extending freely through said j bores and drivingly connected to said body within the bore thereof. v

3. In a device of the character described, a body provided with a plurality ofradially extending recesses,abrasive members mount? ed in said recesses and movable radially relative to said body and lateral projections carried by said abrasive members and abutting the ends of said body for takingup axial thrusts imparted to said abrasive members. 4. In a lapping device, a body, a plurality of abrasive elements carried by said body and capable of radial movement relative thereto, adjusting members engaging said abrasive elements and spaced respectively from the ends of said body, means extending freely through said body connecting said adjust; ing members for movement axially as a unit relative to said abrasive members and means for relatively moving said adjusting members for radially adjusting said abrasive elements.` l

5. In a device of the class described, a body, a plurality of stone holders carried by saidfbody and movable radially relative thereto, Ysaid stone holders being provided with inclined surfaces, adjusting members engaging said inclined surfaces, a sleeve upon which one of said adjusting members is slidablyI mounted, means extending through said body connecting the other adjusting mem'- ber to said sleeve, a member adjustably threaded upon said sleeve for relatively moving said adjusting members and a drive shaft extending freely through said sleeve and into )said body and universally connected thereto. 6. In a device of the class described, a body, a plurality of stone holders carried by the body and movable radially relative thereto, said stone holders provided with inclined faces extending beyond opposite ends of the body, adjustable members spaced from the ends of said body and engageable with the inclined faces, and means for actuating said adjusting members.' i

7. A device of the class described having in combination, a body, a plurality of stone holders carried by the body and movable i radially relative thereto, adjusting members for the stone holders, a sleeve upon which one of the adjusting members is slidablemounted, means for connecting the other adjusting member to the sleeve, and al member adjustably mounted upon the sleeve and engageable with the adjustablemember thereon for ac-4 tuating the same.

8. A device of the class described having in combination, a body, a plurality of stone holders carried b the body and movable radially relative tereto, adjusting members for the stone holders, a sleeve upon which vone of the adjusting members is slidably mounted, said sleeve arranged Within the stone holders and spaced from one end of the body, means for supporting the other adjustable member in spaced relation to the opposite end of the body including members extending through the body and connected to the sleeve,

and means for relatively moving the adjusting members for radially adjusting' the stone holders.

9. In a device of 'the class described, a

body, a plurality of stone holders carried by said body and movable radially relative thereto, said stone holders being provided with inclined surfaces, adjusting members engaging said inclined surfaces, a sleeve upon which one of said adjusting members is slidably mounted, means extending through said body connecting the other adjusting member to said sleeve, and a member adj ust'ably threaded upon said sleeve for relatively moving said adjusting members.

' 10. In a lapping device, a body, a plurality of abrasive vmembers carried by the body and movable radially relative thereto,

adjusting elements for the abrasive members spaced axially beyond op osite ends of the body, a-A driving shaft, an a universal connection between said shaft and body substantially centrally longitudinally of the evlce.

V In testimony whereof I affix my signature.

CARL W. FLOSS.

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