US1714570A - Slotting tool - Google Patents

Description

May 28, 1929. F, W, QQEBBEL 1,714,570

SLOTW ING TOOT.

Filed JanA 16, 1926 Patented May 28, 1929.

UNITED STATES PATENT OFFICE.

FREDERICK W. ROEBBEL, OF ST. LOUIS, MISSOURI, ASSIGNOR TO COMMONWEALTH STEEL COMPANY, OF ST. LOUIS, MISSOURIy A CORPORATION OF NEW JERSEY.

SLOTTING TOOL.

Application filed January 16, 1926.

My invention relates to machine tools and consists in an improved construction and arrangement of a reciprocating Atool adapted to be used on plane-rs, shaj'iers an.. slotters, or other tools using a recijin'oeating motion.

The main object ot my invention is to provide a tool which may operate simultaneously on spaced surfaces and particularly surfaces which face in different directions. This makes possible the more rapid and elfective operation of the machine to which my tool is applied.

An additional object of? my invention is to provideiior shifting of the tool te ditferent angles about the axis oi its movement so as to permit the tool to successively cut surfaces at angles to cach other without other adjustment oilE the machine.

In the accompanying drawings, I illustrate my invention as applied to a slotting machine and operating upon the pedestals of a car truck frame, and in these drawings- Figure l is a front elevation oi a shitting machine showing the truck frame mounted thereon and my cutting tool in operative position.

Iiigure 2 is a side elevation of the structure shown in Figure l.

Figure 3 is an enlarged detail ot the tool as seen in Figure 2 and also showing a portion ot the pedestal being operated upon.

Figure 4i is a side view of the parts shown in. Figure Figure 5 is a bottom view of the parts Ishown in Figure 3.

Figure 6 is a detail of the cutters and their mountings similar to that shown in Figure 3 but drawn on a still largerscale.

iigure 7 is a vertical transverse section through a cutting tool and illustrates a modification of my invention.

Figure 8 is a side view of the tool shown in Figure Figure 9 is a bottom view of the body ot the tool shown in Figures 7 and 8 and taken substantially on the line 5)-9 of Figure 8.

Figure 10 illustrates the use of the tool as an ordinary cutting tool adapted to make a single cut with each stroke.

Figure 11 illustrates another moditication oi my invention showing the tool cutters shaped to operate on two parallel surfaces Atar-in in the same direction.

semi No. 81.800.

The machine 1 may be of any ordinary slotter construction and iorms no part oi my present invention. It will be und nstood that the machine is adapted to provide vertical reciprocal movement of a rack 2 terminating in a portion 3 adapted to receive the tapered shank 4 of a cutting tool. the body of which is indicated at 5.

I show a ear truck frame G mounted on the base of the machine l in inverted position. This frame is a one-piece casting with integral pedestals 7 and is of familiar form. It is necessary that the opposing facci-1 of the pedestal jaws be machined parallel with each other and my improved tool enables this to be done quickly and accurately.

A cutter' holding member S is detachably secured to the lower end of the tool body 5 by means of a stud 9 and nut l0. The lower face of body has two grooves li extending at right angles to each other and the upper face of member 2 has two corresponding ribs l2 whereby when the niember is assembled with the body and nut l() is tightened, the two parts are held againsty relative rotation about their axis. but by loosening` nut 10 the cutter holding portion of the tool may be easily shifted. ninety degrees in a horizontal plane and thereby adapted to plane surfaces at ninety ifiegrees to the original surfaces. Obviouslyv the angle of change may be varied by suite-ble variations in the slots and ribs or the la may be .increased in number so as to care oi. more than two positions ot the ioni.

The lower tace of member 8 has a deep recess extending' transversely of the member and in this recess I insert cutter holding elements l?) which are pivoteii aiY lt near their upper inner corners to the sides of the recess and may swing downwardljT about their pivots from the position shown in full lines in Figure 3 to the position shown by doteand-dash lin-'fs in Figure F3, the, lower inner corners ot' the elements ,heing` beveled to accommodate such movement. It will be understood that this position of elements taken when the tool is withdrawn after the end of a cutting stroke. On the downward stroke, the upper face of the cutter is positively eng 'ed by 'the bottom of the recess. Cutter bits l5 are inserted in the lower portions ot' elements and may be individually adjusted, resharpened and removed as necessary, each being lit) retained by its individual set screw 3l. Cutters l5 are shown in the preferred einbodiment ot my invention as having their cutting trices or edgesI extizinding in opposite directions to engage oppositely facing suaces on the truck pciflestal jaws.

Eleii'ients I3 are provided with laterally extern-ling studs lo on which are provided spring seating blocks I7 and a coil spring i8 is coii'ipressed between the pair ot blocks on the saine side of the tool. These cuttiiig tools are yieldingiy mounted to prevent the tools troni undue draggiiigpri fire on the return stroke which would dull tire cutting edge. rl[he springs rei; .rn the cutting tools to cutting position at the end of the return stroke. ln the moditicatioi shown in Figures 7, 8, and t) I provide a sleeve I9 which surrounds the tool body 2O and its lower end has a flange 2l which provides a wider sup* porting surface toi: the upper tace ot the cutter holding element 22 which shown as intending laterally for a subslai'itial distance beyond the side otl the tool body. Studs 223 hold sleeve il) against dropping o the body ot the tool when member 22 is removed. The upper portion oit body 2t) is provided with an annular ilange 2liwhich engages the upper end oilV sleeve 19 and the lower tace of the machine element 3, thus providing a rigid brace lior the ci'ltter holdiiig element 22. One side olf the sleeve 19 will have a suitable opening 25 provided therein to per` mit access to nut 26.

Il. it is desircifl to use the tool in the ordinary iiianner, element tl or 22 may be removed and an ordinary cutting tool 27 may be inserted in the body 28 as indicated in Figure l0.

In Figure ll I .illustrate a inodilication of my inii'ention in which the cutters 29 are pivotally mounted in a cutter holding elcnient 3l) similarly to the arrangement shown in Iiigures 3 to S but the cutters are bent at right angles Vin such manner that their cutting edges or laces are parallel although widely spaced :troni each other. In this ligure the tool is shown as ope 'ating on the side t'aces ot the spaced pedestal jaws 7 of the truck frame.

bviously numerous inodilications in the details oi my ini'ention may be made withn out departing :trom the spirit thereof and I conteinjilate the exclusive use or" such changes as are included iii the scope ot' the Yfollowing claims.

I claim:

l. In a tool olf the class described, a body, cutters mounted on and extendiiig laterally from said body, and a sleeve surrounding said body and affording an axially :tacing bearing tor the portions o1 said cutters projecting beyond the sides oit said body.

2. In a tool of the class described, a body having a downwardly facing shoulder near .its upper end, cutters extending laterally trom the lower portion ot' said body, and a removable sleeve surrounding said body and seated against said shoulder and iiiroviding a bearing :tor the projecting portions ot said critters.

3. In a reciprocal cutting tool, a body, a ijilurality or" cutter holders mounted on said body so as to pivot in the direction or" reciprocal movement, cutters in said holders, mea-ns limiting pivoting oic said holders in one direction about said pivots, the cutting edges or' said cutters facing in saine direction, and yielding means mounted on the sides oli said holders for simultaneously thrust-ing said cutters into operating position.

Al. In a tool ot the class described, a body having` a vertical recess extending transversely thereof and a plurality of alined cutter members pivoted in said recess so as to swine' downwardly from a. normal position but positively held against upward movement 'troni said position, their cutting portions extending outwardly of opposite ends ot' said recess and facing in the saine direction, and a spring mounted on and conipressed between said cutter members below their pivots and outside ot said body and yiehlingly thrusting` said cutters into normal position.

In a tool ot the class described, a body having a vertical recess in its bottoni and extending from side to side of the body, a plurality of cutter holders located in said recess with aligned cutter receiving portions opening outwardly of the recess, elements pivoting the upper inner corners of said holders to the sides of lsaid recess, the upper outer corners ot said holders being adapted to bear against the top of said recess, and a spring mounted on and compressed between said holders below said pivots tor thrusting cutters mounted in said holders into cutting position.

G. In a tool of the class described, a body having a vertical recess in its bottom and extending iti-om side to side of the body, a plurality of cutter holders located in said recess with aligned cutter receiving portions opening outwardly ot the recess, elements pivoting the upper inner corners of said holders to the sides of said recess, the upper outer corners of said holders being adapted to bear against the top ot said recess and the lower inner corners of said holders being bevelled to permit pivotal movement downwardly of said cutters trom such connecting position, and a spring mounted on and compressed between said holders below said body ;t'or thrusting cutters mounted in said holders into cutting position.

In testimony whereof I hereunto affix my signature this 12th day of January, 1926.

F. W. ROEBBEL.

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