US1313628A - Millilfg-machine cutter - Google Patents

Description

B. D. FORD.

MILLING MACHINE CUTTER.

APPLICATION FILED NOV.27. 1916.

l 3 l 3, 6 2 8. Patented Aug. 19, 1919.

Jnuen/ar BION D. FORD, O F CLEVELAND, OHIO.

MILLING-MACHINE CUTTER.

Specification of Letters Patent.

. Patented Aug. 19, 1919.

Application filed November 27, 1916. Serial No. 133,526.

To all whom it may concern: Be it known that I, BION D. Font), a minzen of the United States,.residing at Cleve land, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Milling-Machine Cutters, of which the following is a full, clear,

and exact description, reference being had to the accompanying drawings.

This invention relates generally to milling machine cutters, and more particularly to one having detachable blades, the object of the invention being to provide a highly efficient milling machine cutter at a reasonable cost; and another object is to lprovide one in which the blades can'be quic ly and easily removed for replacing; and a still further object is to provide a millin machine cutter having detachable bla es in which the blades will be held securely against radial, lateral or wabbling move ment after they have once been fastened in the body of the cutter.

With these objects in view, and certain others which will appear hereinafter, the invention consists in the novel construction of the blade and also in the novel manner of constructing the blade receiving socket in the body portion of the cutter, and in the manner of securing said blade in the socket.

The invention consists also in certain de I tails of construction and novelties of combination both which will more fully appear as the description proceeds, and will be pointed out in the appended claims.

In the drawings forming a part of this specification- Figure 1 is a detail perspective view illustratin a portion of a cutter, one of the cutter b ades and fastening pins being removed;

Fig. 2 is a side elevation of a cutter constructed in accordance with my invention, three of the blades being removed from the body portion thereof;

Fig. 3 is a sectional view of the b0dy.portion taken on the line 3-3 of Fig. 2;

4 is a detail view of the locking pin, and

Fig. 5 is a detail perspective view of the blade showing the cutting edge.

In the practical embodiment of my invention, I employ a substantially circular bodfy portion A preferably of nickel steel or so t steel, heat treated and case hardened; thls body being of suitable axial thickness and having the central portion thereof shaped for attachment to a shaft or arbor.

In the periphery of this body is cut a series of equi istant blade receiving sockets B, each cut extendin entirely through the body, in line with t e axis thereof. One wall 0 of the socket is cut on a radial line as shown, while the opposite wall D is parallel with the Wall C. The bottom of the socket is concaved, being out on an arc of a circle, the center of which is in a central axial plane of the body, the radius being in excess of the depth of the socket.

The blade FlS made of high speed tool steel and is of a thickness to fit snugly between the walls C and D and has the bottom G curved upon the arc of a circle corresponding with the curved bottom E of the socket, so that, when the blade is inserted radially into the socket it will seat perfectly in the body and will occupy a perfectly true position axially therein.

In order to securely fasten each blade in its socket I employ a pin H having a flat face H, and this flat face is out upon a very slight taper, that is about 2. Pm receiving holes I are bored through the body, these holes belng of the same diameter as the pins H and they are so positioned as to intersect with the wall C of each socket, the part of the wall intersected being substantially coextensive with the flat face H of the pin, leaving wall portions upon the inner and the outer edges of the recess.- These holes I are also bored on an angle of 2, and the socket may therefore be described as having fiat walls and a curved bottom, one of its walls having a longitudinal recess slightly obliqued.

The blade F has one continuous flat face K which contactswith the flat wall D of the socket, and the cutting edge face of the blade is flat for a portion of its length as shown at L, this flat portion being of such length that the inner portion contacts with the wall 0 outside the recess I. The extreme inner portion of this face is also fiat as shown at M and contacts with the wall of the socket inside of the recess, but between the flat portions L and M this face of the blade is beveled or cut away as at N, the beveled or cut away portion extending from the part M and terminating in the shoulder O at the inner end of the portion L. This bevel M is substantially coextensive with the flat face H of the pin and is out upon an angle of from to 8.

The fiat face K of the blade is the same Width as the body portion A but the cutting edge portion is slightly wider as shown clearly in Figs. 1 and 5.

Each blade is inserted radially in its particular socket until its convexed end seats firmly in 'the concaved bottom of the socket, the beveled or cut-away portion of the cutting edge face being arranged opposite the recessed wall of the socket. The pin is then inserted in this recessed portion of the socket, and driven home, securely locking the blade in the body and holding the same against radial axial and wabbling movement.

It will be understood that when the blade needs replacing it can be removed by simply driving the pin out and lifting the blade from the socket. A milling machine cutter constructed as-herein shown and described has been found to fully carry out and accomplish all of the objects hereinbefore referred to;

Having thus described my invention, what I claim is v '1. A milling machine cutter comprising a body portion having peripheral blade sockets, the bottom of each socket being concaved, a to fit the concaved bottom of said socket and a wedge positioned in the socket parallel to the axis of the cutter and engage said socket and blade and hold said blade in said cutter.

2. A'milling machine cutter comprising a body portion having peripheral blade receiving sockets, the bottom of each socket being concaved on the arc of a circle, one wall of said socket being recessed, said recess being parallel to the axis of the body of the cutter, blades fitting into,said sockets, the bottom of each blade being convexed and curved on the same are as the concaved bottom of socket, and a Wedge adapted to be inserted in the longitudinal recess of' each socket, said Wedge having a flat face adapted blade having its bottom cOnVeXed having a flat face adapted to engage the recessed face of the blade, said wedge being inserted in the longitudinal recess in the socket wall.

4. A milling machine cutter comprising a, body portion having peripheral blade receiving sockets, the bottom of each socket being centrally depressed, one wall of each socket being recessed, said recess being oblique, blades adapted to be inserted in said sockets, each blade having its bottom shaped to correspond to the centrally depressed bottom of the socket and each blade haying its face opposite the socket recess cut away upon a fiat incline, and a pin having a tapered flat face .adapted to engage the flat inclined face of the blade, said pin being inserted in'the socket recess.

5. A milling machine cutter comprising a bodyv having peripheral sockets and blades seated therein, each socket having a cen trally depressed bottom and each blade a bottom corresponding in shape to the centrally depressed bottom of the socket, each socket having also a tapered recess in one wall thereof parallel with the axis of the cutter and .each blade having one face thereof cut away upon an incline, said cut away face being flat, and locking pins for locking said blades in the sockets each pin being adapted to fit in the socket recess and also having a tapered flat face adapted to engage the flat inclined face of the blade.

In testimony whereof, I hereunto afliX my signature.

BION D. FORD.

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