US 1291467 A
Description (OCR text may contain errors)
6. G. FORESTER.
APPLICATION FILED APR.6. 1918.
Patented J an. 1 1 1919.
' the metal.
IJ'NIT SATES PATEN T OFFICE.
GUSTAV G. FORESTER, 0F MOLINE, ILLINOIS.
Application filed April c, 1918.
To all whom it may concern Be it known that I, GUSTAV G. FORESTER, a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Reamers, of which the following is a specification.
My invention has reference to reamers, and is more specially designed for use in finishing the tapered openings in the center of metal hubs. As heretofore used, reamers for this purpose have been formed of a series of sections of gradually varying diameters. In using a reamer of that character for trimming out the inner wall of the hub, and preparing it for the operation of a smoothing or finishing tool, irregular cuts, or steps would be formed in These irregularities would be later removed by the finishing tool, and frequently two of such tools would be required, one to do the rough finishing work, and the (fither to provide the smooth, or finished sur- 'ace.
By the use of my invention, it is possible to produce a uniform and continuous cut on the inner wall of the hub, without leaving ridges or irregularities such as are caused by the reamers above mentioned. This makes it possible to remove a very small portion of the metal, instead of having to trim out a considerable amount, as at present. It is now usual to bore the opening in the hub of considerably less diameter than is required when the same is finished, so as to allow for the material which is wasted in the cutting. By the use of my invention this is not necessary, as all of the metal that is required to be removed is the bare thickness of the scale that is formed thereon when the hub is cast. There is thereby a considerable saving of material through the use of my tool. The wall of the opening in the hub is also left in such condition as to make only one smoothing operation necessary, thereby reducing the time and cost of production.
In my device, I use a plurality of knives, or cutters, arranged in alternating series, and disposed in tapering relation, so as to produce the desired cut in the hub. These cutters can be sharpened, or replaced, when worn, and can be separately tempered, thus doing away with the necessity of tempering the entire tool, as is done in those now in use. When the entire reamer is hardened,
Specification of Letters Patent.
Patented Jan. 14, 1919.
Serial No. 226,989.
the temper thereof is frequently not uniform, soft spots occurring therein, which interfere with the efiicient operation of the tool. The cutters above referred to, which are embodied in my invention, are secured in place in a novel and substantial manner.
The foregoing and other features and advantages of my invention will more fully appear in the following specification, reference being had to the drawings accompanying the same, in which:
Figure 1 shows my invention in elevation, detached. Fig. 2 is a horizontal section therethrough.
In machines in which inventions of this class are in use, it is customary to support the reamer in inverted position, so as to be vertically movable, but so as not to rotate, and the hub to be operated on by said reamer is secured to a rotatable table or lathe, so as to revolve therewith. The reamer is thereupon moved gradually downward into the opening in the hub, until the desired amount of cutting of the metal is accomplished. No part of the machine for operating the reamer or hub is shown in the drawings herein.
1 represents a shaft, adapted to be vertically supported from a machine in any usual manner for operation as above mentioned, upon the upper end of which shaft is a collar 2. A plurality of metal disks 3 are adapted to be located on said shaft by means of openings 4 in the center thereof, of suflicient diameter to permit the disks to move freely on the shaft 1. The upper disk 5 is rigidly connected with said shaft.
The disks 3 and 5 are provided in their adjacent faces with recesses 6, adapted to receive cutters 7, preferably square in crosssection, as shown in the drawings. The recesses 6 are provided alternately in opposite faces of the disks, so as to permit of the arrangement of the cutters 7 in alternating rows, as shown in the drawings herein. For the special use of the tool, such as is hereinbefore mentioned, the disks 3 are provided with a gradually decreasing diameter downwardly, and the cutters 7 are also formed of varying lengths, so as to provide a tapering conformation therefor. Said disks are held in place by means of an internally threaded collar 8 on the lower threaded end of the shaft 1. The width of said disks, as compared with the thickness of the cutters 7, is such that said disks are slightly spaced apart. By this means the tightening of the collar 8 operates to clamp the cutters tightly between the disks. also acts as a key, to prevent any of said disks from rotating on the shaft.
The cutters 7 are shown herein as arranged in two pairs of alternating rows, but such arrangement can be varied to some 6X- tent, it being necessary to have a sufficient number of "such rows against the wall of the hub on at least three sides, of the tool. Said cutters are also preferably arranged so that the lower edges of one pair thereof will be in substantially the same horizontal plane with the upper edges of the next alternating pair below the same.
Thelength of the reamer is greater than that of the opening to be finished, so that as the lower cutters 7 become worn, the tool: can be moved a greater distance downwardly, bringing fresh cutters into operation. When all of such cutters become worn, so as-to be no'longer effective, the upper cutters can be moved downwardly in the tool to a point where a less diameter of cut is required. All of the cutters can thus be used until reduced to the length of those in the lower end of the tool.
The cutters 7 are provided with a sufficient degree of hardness for the work for which they are required, but the other parts of the tool need not be tempered, but can be formed of' cast or similar metal. In case one of the cutters is discovered to be insufficiently tempered, it can be removed and replaced by another one. Gutters of the preferred form, as shown and described herein,.can be readily produced from bars of tempered metal now 'procurable for machine purposes.
What-I claim as my invention, and desire to secure, is:
1. A. device of the class described, comprising ashaft; a plurality of. disks of tap'ering' formation supported on said shaft; and a plurality of cutters adapted to be Copies of thiBv patent may be. obtained for Each of said cutters to give a bearing tame? clamped between said disks in alternating rows, the conformation of the cutting edges of said cutters coinciding with that of said disks.
2. A device of the class described, comprising a shaft; a plurality of disks provided in adjacent faces with coinciding recesses,-disp0sed in alternating rows; a plurality of cutters held in said recesses, the cutting edges of said cutters having a tapering conformation; and means for clamping said disks and cutters tightly together.
3. A device of the class described, comprising a shaft; a plurality of spaced-apart disks provided in their adjacent faces with coinciding recesses, disposed in alternating rows; a plurality of cutters held in said recesses, the cutting edges of said cutters havinga tapering conformation; and means for clamping said disks and cutters tightly together.
4. A device of the class described, comprising a shaft; a plurality of disks supported on said shaft in. tapering sequence, and provided in their inner faces with co inciding recesses, arranged inv alternating rows; a plurality of cutters adapted to be held in said recesses, the adjacent edges of said cutters being. in approximately the same plane transversely for clamping Sflddg together.
5. A device of the class described, comprising a shaft; a plurality of clamping members, arranged on said shaft in tapering sequence, and adapted toreceive. a plu rality of cutting members, arranged inalternatingseries; a plurality of cuttinginembers, removably held in said clamping members, and assisting in locking'the samefrom rotation on said shaft; and means carried by said shaft for holding said clamping members and cutting members tightly to: gether.
Intestimony whereof I affix my, signature.
GUSTAV G. FORESTER.
disks. and cutters tightly five cents each, by. addressing the .Gommi-Sfiiqner. of Patents,
Washingtqn, D. 0.!
of said shaft; and means