US1791491A

US1791491A - Cylindrical honing tool

Info

Publication number: US1791491A
Application number: US352157A
Authority: US
Inventors: William F Emerson
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-04-03
Filing date: 1929-04-03
Publication date: 1931-02-10
Anticipated expiration: 1948-02-10

Description

Feb. 10, 1931. w. F. EMERSON 1,791,491

CYLINDRICL KONING' TOOL Filed April 3, 1929 y 2f i; 2y u enema ret. 1e, 1931 "unirse srarss P Willman r. EMERsoN, oFwILIQIAMsvILLn, NEW'YORK CYLINDBICL HON IN G TOOL Application filed April 3, 1929. Serial No. 352,157.

This invention relates to the art of grinding or resizing vof the cylinder walls or bores of automobile and like internal combustion motors and consists of an improved honing or grinding tool particularly adapted for performing the operation of grinding with an improved degree of accuracy and in any manner to obtain important advantages over the honing structures as heretofore employed for the purpose.

The important features of the improved device'of the present invention include the provision of means for adjusting the edective operatingdiameter of the honing elements or stones to establish the operating diameter of the tool with reference to varied sizes of cylinder bores. to be operated upon; structural provision whereby upon a simpleinterchange of parts the tool may be adapted successfully to operate upon substantially enlarged cylinder bores thereby to allow of greater utility; and improved arrangement for supporting and adjusting the stones whereby in the honing or grinding operation the stones will be positively adjusted to a given operating diameter and including the provision of a supplemental spring adjustment arranged to import expanding movement to the stones under a relatively light pressure so as to be operative to retai the grinder or tool within the bore against dropping when the bore is finished and further adapted to impart a light outward pressure on the stones for finish'ng of the bore with a light honing action so as to give a polished finished surface.

The foregoing and other features and advantages of the present invention will be understood by reference to the accompanying drawings, wherein like reference numerals are applied to the corresponding parts in the several views.

ln the drawings:

Fig. 1 is a view in side elevation of ahoning tool embodying the features of the present invention;

Fig. 2 is a central vertical sectional view thereof;

Fig. 3 is a plan view thereof; and

Fig. 4 is a view in side elevation of a modified or elongated bearing sleeve element. j

ln the approved embodiment of the features kof the invention as illustrated in the drawings, 1 indicates a vertically elongated cylindrical body or supporting member having a cylindrical bore or opening 2 extending therethrough of uniform diameter as shown. The body portion. is providedv with a series of radially extending upper'y and lower bearing apertures or openings 3 and l in vertical f alignment and equi-distantly spaced about the circumference thereof. These radially disposed bearingv apertures are outwardly elongatedbythe provision of integral shoulders or bosses 5, arranged to give increased bearing area and to provide inner stopsf'for the honing elements 'associated therewith.

The honing elements consist of the carborundum composition or like abrasive elements 6 fitted within metallic supportingtrays 7 of channel form and within which the abrasive is secured by suitable cement. For the supporting of the abrasive elements orstones,v bearing sleeves 8 are fitted within the respective bearing apertures 3 and 4, the sleeves 8 being provided with inwardly lextending bores or openings 9, to receive pins or studs 10 rigidly secured by welding to the inner sides of the channels 7. The pins 10, as indicated best in Fig. 2, areslitted inwardly from their free end portions to give an expansible gripping pressure forvresiliently holding the stone elements in assembled position. AThe sleeve members 8 'at their inner end portions are formed with enlarged conical bearing surfaces 12, for engagement with complemental conical surfaces of an adjusting member now to be described.

For expanding or outwardly moving of the abrasive elements, there is provided a centrally positioned'k adjuster or actuator member 14 formed with upper and lower cy lindrical portions 15 and 16 having a bearing fit within the bore 2 of the body member 1 and formed at 17 and 18 with downwardly and inwardly tapered or conical bearing portions positioned to engage the conical surfaces 12 o-f the stone bearing sleeves 8, The

adjuster member 14 is accordingly itted to be slidable vertical within the body member and by reason of the engagement of the conical surfaces, movement thereof will determine the outward position of the abrasive elements or stones and accordingly establish the effective operating diameter. To control the adjusting movement ci the adjuster member 14 and to accurately establish the operating diameter of the stones, means are provided for controlling the movement of the actuator with a micrometer adjustment and indication. For this purpose the upper end portion of the body member 1, is externally threaded at to receive thereon an adjusting sleeve 21 internally threaded and provided at its upper portion with a knurled manipulating portion 22. The adjusting sleeve 21 is formed at its lower end portion with an eX- ternal annular groove 23 to receive the inwardly projecting ends of screw studs 24 carried by an annular collar 25 closely fitting the sleeve 21 which is rotatable with relation thereto. The collar member .25 is provided with opposite radial bores 26--26 to receive the extremities of a connecting or coupling pin 27 passed centrally through apertures 28--28 formed in the upper portion of the adjustor member 14. The construction accordingly provides, that upon rotation of the adjusting collar 21 the resulting vertical movement thereof will be imparted through the pin Q7 to the adjustor member 14 and accordingly effect the adjustment ormovement of the abrasive elements through the conical surface engagement 'hereinbefore referred to. For accurately determining the movement of the stones in response thereto, the adjusting collar 21 is provided with an indicatin mark or indentation upon the outer sur ace of itsside wall andthe upper surface of the collar member 25 is provided with a series of graduation marks to coact therewith for visibly determining the adjustment of the collar and thereby facilitate the adjustment of the stones to the effective operating diameter desired.

As shown in Fige 2 the upper end portion of the adjustor member 14 is formed with a centrally positioned recess or socket 3() within which is positioned a coil spring 31 interposed under compression between the coupler pin 27 and the bottom wall of the recess 30. operatively related thereto and as shown, the annular groove of the adjusting collar 21 and the apertures Q8 in the upper portion of the adjustor member for the reception of the coupling pin 27 are vertically elongated to allow of a limited vertical movement or play of the pin 27.

The body member 1 at its upper end portion is suitably formed to have flexible couling connection with a driving spindle 35 adapted for connection with a portable driving motor. For this purpose the upper portion of the body member is formed with a bayonet slot 36 to be engaged by driving pin 37 carried by a spherical lower end portion 38 of the spindle 35. rlhe driving connection thus provided rotatably connects the body portion 1 to the motor driving spindle with a desired degree of play or flexibility allowing the motor and grinding tool to be manually supported and manipulated in the honing operation.

in accordance with the present invention, the strength oi the coil spring 31 is proporticned to impart a relatively light outward pressure-upon the stones which may be said to be a supplemental and reduced pressure and is to a degree particularly adapted as a iinishing and polishing operation. Accordingly it will be understood that in the primary grinding or honii 1^ operation, after inserting ot the tool within the bore, the adjusting collar 21 will be screwed downwardly to expand the stones into tirm engagement with the cylinder walls, in which operation the spring 31 will be compressed to the limit allowed by the vertical play ot the pin 27, the pin at this time having engagement with the lower wall of the recess QS. The primary grinding operation is then carried out by the rotation of the tool and the progressive advancing oi. the adjusting collar to the degree desired, under which conditions the primary grinding operation is etlccted with a positive advance of the adjuster member distinct. from the resilient advance of said member elllectcd by the spring 31. Subsequently, with the desired amount of metal having been moved from the bore, a continued. rotation of the tool by reason of the supplcmentalexpansion ot the stones under the influence oi the s ring will effect a desirable polishing and finishing operation under a relatively light pressure.

As will be further understood, the spring 31 further operates in a desirable manner to retain tlic honing tool trom falling within the bore and further operates to talte up the slack of the parts.

The improved structure as described is further desirable in that it provides a rclatively wide operating range considered with relation to the varied sizes of cylinder bores and vfurther in the instance ot bores ot cessive diameter allows ot conveniently accon'nnodating the tool thereto by sub `tuting additional sleeve members 8 of increased length, though. utilizing the same and sto-nes, as illustrated in Figure 4.

liiihile I have here shown and described an improved embodiment of the features of the present invention, it will be understood 'that various modiiications may be made tnerein without departing' from the scope ot the appended claims. 1t is therefore intended that such disclosure shall be interpreted illustrat-ive and not in a` limiting sense,

Having described my invention, I claim:

l. A honing tool of the character described Icomprising a supporting member having a longitudinal bore and radially disposed beartherein, bearing sleeves fitted tothe bearines and having inner conical surfaces, said sleeves having bores opening outwardly, abrasive elements having inwardly extended pins fitted to the sleeve bores, an adjuster member slidably iitted within the. bore of the supporting member and provided with similarly disposed conical or inclined portions positioned to enga-ge the conical surfaces or" the sleeves, means for adjustably movin g the adj ustor member to determine the position of the abrasive elements comprising an adjusting sleeve threaded externally upon the supporting member and formed with an annular slot, a collar fitted to the lower end of the sleeve and having studs entering the groove, a coupling pin iitted to vertical slots in the supporting member and to openings in the adjustor member and with its extremities litted to apertures in the collar, thereby to 'transmit axial movement of the adjusting sleeve to the adjustor member, the openings in the adjuster member for said pin being vertically elongated and said adjuster being formed with a socket positioned beneath the pin and a compression spring itted within the socket to engage the pin to be operative to exert an advancing pressure to the adjuster member substantially as describe-d.

2. A honing tool oi' the character described comprising a supporting member having' a longitudinal bore therethrough and radially disposed bearing kapertures therein, bearing sleeve members slidably fitted to the apertures, said sleeve members having conical inner end portions and bores inwardly eX- tending from their outerV end portions, trays provided with slotted pins i'itted to the sleeve bores, abrasive elements carried by the trays and means for radially adjusting the abrasive elements consisting oil an adj ustor member axially movable within the supporting member and provided with conical portions positioned to engage the sleeve conical end portions and means tor adjusting the position of the adjustor member.

3. A honing tool of the character described comprising a supporting member having a longitudinal bore therethrough and radially disposed bearing apertures therein, bearing sleeve members slidably fitted to the apertures, said sleeve mem ers having conical inner end portions and bores inwardly eX- tending from their outer ends, trays provided with slotted pins fitted to the sleeve bores, abrasive elements carried by the tra-ys and means tor radially adjusting the abrasive elements comprising an 'adjustor niember axially movable within the supporting member and provided with inclined portions engaging the inner ends of the sleeves, positively acting means operative to move the adj ustor for advancing the abrasive elements outwardly and supplemental resilient means associated with the positive adjusting means to be operative to impart advance movement to the abrasive elements with a relatively light-pressure for a linishing and polishing operation.

Signed at Butlalo in the county of Erie and State of New York this 11th day of March, A. B. 1929.

l/VlLLIAM F. EMERSON.