US2834232A - Tool mounting - Google Patents

Description

May "13,1958

T. E. BROOKS TooL MOUNTING n Filed oct. 27. 195s' TOOL MOUNTING Thomas E. Brooks, Clarinda, Iowa, assignor to Lisle Corporation, Clarinda, Iowa, a corporation of Iowa Application October 27, 1953, Serial No. 388,653l Claims. (Cl. 772) This invention relates to a tool mounting for a work contacting tool carrier such as shown in my co-pending application, Serial No. 310,680, tiled September 20, 1952, which has issued as Patent No. 2,780,115, dated February 5, 1957, the present tool mounting being adapted for such tools as cylinder ridge reamers of the type shown in Olson Patent No. 1,927,594.

One object of the present invention is to provide a tool mounting for a tool carrier wherein the tool is a combined cutting and guide blade and the carrier has a socket to receive it, the socket being enlarged at two points for the reception of a spring at each point, which springs form the sole backing support for the tool.

Another object is to provide one of the springs located behind the cutting edge of the tool and the other behind the guide edge thereof for eiiicient cutting action of the tool in relation to the work.

Still another object is to provide a simple means for holding the springs in their enlargements when the tool is removed from the tool carrier, this means consisting of projections past which the springs can be threaded to enter them into their sockets.

Still a further object is to provide a stabilizer blade connected with the tool carrier and cooperating with the tool in its tool mounting to minimize vibrations in the operation thereof during the reaming of the cylinder, the stabilized blade being in the form of a resilient sheet metal blade attached to the tool carrier and having a part inclined relative to the adjacent cylinder wall, this part terminating just ahead of the cutting portion of the tool blade.

More particularly, the stabilizer is formed of at spring steel and its function is to contact the wall of the cylinder bore before the cutter makes contact and thus servesA to stabilize the reamer in the bore so that if desired a light scraping cut can be made with the cutter or by heavier pressure on the cutter, by means of the reamer expansion screw, the resilient stabilizer will give vWay and permit a heavy cut to` be made.

With these and other objects in view, my invention consists in the construction, arrangement `and combination 1 oi the various parts of my tool mounting whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawing wherein;

Figure 1 is a plan view with parts broken away showing a ridge reamer in which my tool mounting is used, the tool being adjusted for minimum operating size or diameter.

Figure 2 is a similar view showing the tool adjusted for maximum possible diameter and showing one of the two carriers in section with my tool mounting illustrated in section.

Figure 3 is a side elevation of Figure 2 with a portion thereof `in section on the indicated line 3-3 of Figure 2.

Figure 4 is a three-quarter view of a tool carrier with my tool mounting and stabilizer blade applied thereto nite States Patent f looking Vin the direction of the arrow 4 on Figure 2;

and

Figures 5 and 6 are detail horizontal sectional views on the lines 5--5 and 6-6 respectively of Figure 3.

On the accompanying drawing I have used the reference numeral -10 to indicate in general an upper body member and 12 a lower body member. The upper body member as shown in Figure 2 is in the shape of a 3-arm spider having an upstanding boss 22 at its center; whereas the outline of the lower member 12 is circular. The body member 10 has a bore 14 therein and the body member 12 is provided with a corresponding bore threaded as indicated at 16. An adjusting screw having a shank 18 and threads 20 passes through the boss 22 and the bore 14, and is threaded into the bore 16.

A head 24 on the adjusting screw 18-26 may be engaged by a wrench for rotating the adjusting screw as from the position in Figure 3 to one wherein the lower end of the threaded portion 20 is' about even with the bottom of the member 12 whereupon the tool is adjusted for minimum size as in Figure 1 as distinguished from maximum size as in Figure 3.

The upper body member 10 is provided with three guide grooves 26 and the lower body member l2 is provided with three companion guide grooves 2S which are channel shaped. They are also inclined as evident from an inspection of Figure 3. A carrier member 30 is provided for each set of grooves 26 and 28 and has upper and lower edges slidable in the respective grooves,

Two of the members 30 carry work contacting ribs 36 to engage the internal surface of a cylinder or the like and the third member 30 is provided with a vertical slot 39 in which is received a tool 38. Also, each of the carrier members 30 is provided with a spring receiving notch 42 which receives a coil spring 46 that surrounds the tool and is also received in a notch 44 of the tool blade 38.

The tool blade 38 has a cutting portion 40 and a work 'contacting portion 41. The cutting blade portion 40 may be an insert of tungsten carbide to resist wear of the cutting tool. The spring 46 tends to keep the car# rier members 30 biased toward the center lof the tool and to retain them in theV guide slots or grooves 26 and 28 of the body members 12 and 10. It also moves the carrier members 36 inwardly when the adjusting screw 18-20 is rotated counterclockwise in order to permit adjustment to a smaller diameter of cylinder py permitting the body member 12 to recede from the body member 10. f

Each of the carrier members 30 is provided with a supporting lug 48 adapted to contact the upper surface of an engine cylinder block 50 as shown in Figure .3 when the tool is used as a ridge reamer for removing a ridge 52 from the inner surface of the cylinder. When used in this manner suitable power means or a wrench is applied to the hub 22 for rotating the reamer clockwise in Figure 2 so that the cutting blade 40 may cut ot the ridge 52 of the cylinder wall until this portion of the cylinder is coincident with the rest of the cylnder wall against which the tool 3S is held by a pair of springs 54. These springs also permit the tool to follow an out` of-round cylinder.

With further reference to the springs 54, theyare mounted in enlarged sockets 56 of the slot 39, one of themY being located approximately centrally behind the cutter `bladev 4i) and the other approximately in alignment with the work contacting portion 41 of the blade' 38.l TheA two springs 54 constitute the sole backing means for the cutter blade and are relatively stiff so as to exert con-l siderable cutting pressure of the blade against theridge 52 when desired, the tension of the springs of course being adjusted by the screw 13-23 which sets the position of thearrier` members 30. .or causes,t11,em.. to. positively.

assume a predetermined cylinder size. The resiliency of the springs 54 permits the blade 38 to move back in the slott39 and feedAthe cutting edge.All-against:the Vridge 52 with just the desired pressure depending on the setting The preferable adjustment forthis screwH is :one in,l

whichthetool is expanded .with Vthe workcontacting ridges.- 36er two of the `carriers V1min kcontactwith.

thecyIinder wall 50 (indicatedtby dash-lines inFigure 2) and. the 1 corresponding .face i of .the tool i carrying member 30=slightly spaced from the cylinder wall;y The two I nembers fhavingrthe ribs 36 are undercut-at- 37'to..clear v they cylinder ridge S2. The initialpositionoftheblade or. tool 38 is as shown b`y dotted lines in Figure 2 and therefore in the solid line position shown, the springs To retain the springsl 54:intheir socketsk 55V when-the` blade 38 is removed; one side ,of thesocket `is peened to form -a projection 62 fafter the springs are inserted.:

A broken spring'can -bercmoved forreplacement-how ever byfthreading the spring past the projection.l

Duringthereaming operation thetool sstabilizedy bya blade 56-58 secured to thetool carrier blade 30 by a pair of screws 60.A Thisstabilizer bladeis formed of ilat spring steel bent to shapewith two'anges -56 and S8; 56-beingan anchoring flange and -58 -a cylinder contactingllange -initially in the positionrshown by solid linesiii-Figure 2, but bent bachi to'thefpositionshownby dotted ylines during-operation.y The function of the stabi-I lizer blade 56-58 is to contact the wall of thecyiinde'rf bore 50 before the cutter 40 makes contaettherewith and thus lserve to stabilize the reamerin the bore-sothat ifdesired Ia light scraping cut can ybe made without chattering action of the cutter 40. At the same time, if heavier pressure for a heavier cut -is desired,- the reamer'can be so adjusted and 'the flange 58-wil1 give and permit such heavy 'cutwithout interfering Ywith the action -of'the cutting blade 40;` The stabilizerblade makes possible,

is often'found quite desirable.

Some changes may be made in the construction and arrangement-'of the parts of my tool mounting without departing from the real spirit and purpose of my vinvention, and i t 'is my intention to cover by my `claims any modiled forms ofstructure Yor use of mechaniealjirnprjovementswhich may be reasonably included 'within their scop-e.

I claim as my invention:

l. Tool mounting means fora carrier `member comf prisinge .Slot in the carrier membernan elencate@ blade looselyI received in said slot and having a c'uttin' g edge adjacent one end thereof and a work contntingportion adiacent the other end thereonsaid. ends bei'gindepsndentlylidable into Aandout Aof Said .slot a pair' 0f enlarged 'springrsocketsin said slot, aspring in each'socket back'fof'said blade and constituting the sole supporting means-therefor in opposition to the work,l one of'said springsbeinglocated back of said cutting edge-and the othen-baok-of said-work contacting portion of said blade with saidesprings exertingsubstantiaHy equal pressures on?. said'. cutting edge ,andi said workY contacting portion `oft Saidblade: and means-projecting vinto said springsockets received.. invsaidnspecessfor :backing y11pV the bladesand.

resiliently. urging,.-V .withsubstantially vequal pressure, said ends ,off said blade outwardly TWith respect to said tool carrier, and means at the outer ends of said `spaces to retain said springsntirely with ir i said ispaces.

3. Tool mounting means for an adjustable carrier member used in adjustable tools comprising a slot in the carrier member, an elongated blade slidably received in saidgslnti andihaying. cutting means adjacent one Aend thereofqand iwork' contactingguidemeans adjacent the. other: end thereofeafpairlof springs in back of saidblade and constituting supporting means therefor in oppositionl to the work, and Aa leaf spring stabilizer blade secured to.

said toolcarriermemberand having an angularlydifV rected flange located aheadof and extending toward said. cutting means and contactable under pressurewith the cylinderwall Aon which the bladeoperates, said elongated. bladepand..cuttingxmeans being movable -in said slot in dependent :of 1 said \;stabilizer blade.

4.;Tool \mounting means for an adjustable carrier member iusedlintadjustable toolscornprising a slot in the. carrier:member, anelongated. .blade slidably .lreecived inn'sa'id slotsand4 having cuttingmeans adjacentoney end4 thereof fand. .work. contacting guide. means adjacentthe other end thereof, resilient means in saidsloty backing said lblade andxbiasingit outwardlyl in opposition to thewwork, and a1leaffspring stabilizer blade securedA to saiditool"carriermember: ahead of said cutting -means and having-- av rearwardly and. :angularly directedv .flange extending toward said elongated/blade, said flange-being under pressure produced bythe resiliency of saidleaf spring stabilizer.y

5. A= toolmountingfcomprisingl a tool carrier having a slot therein -andlanv elongated blade inrsaid slot having longitudinallyspaced-from eachother, said tool-carrier having a'slot to receive-said'tool blade and said slotbeingV enlarged at -tw.o.- points, springs received insaid enlargements for backing up the blade and resilientlyurging it outwardly withf'respect tosaidY tool carrier, and. a `stabilizer-blade-formedl of-`spring-metal insheet formwith' one llange -located-ahead-of said cutting edge and Vsecured tothe 'tool carrier, another llange extending at an-angle across the outer end of the ytoolcarrier towardthe cutting edge of sailfbladeand contactable-under resilient pressure withthe kcylinder wallinadvance of contactby' said cutting Aedge therewith vand closely thereadjacent.

References Cited finthe file of` this patent UNITEDSTATES PATENTS

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