US1075450A - Cutting-tool. - Google Patents

Description

W. J. VAN OSDEL.

CUTTING TOOL.

APPLIGATION FILED JULY 1, 1911.

1,?A50. Patented 0015.14, 1913.

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WILLIAM J. VAN OSDEL, OF CHICAGO, ILLINOIS.

ASSIGNQE Q35 ONE-HALF TO BAY It.

EDDY, OF CHICAGO, ILLINQIS.

CUTTING-TGOL.

To aZZ whom it may concern:

Be it known that I, WILLIAM J. VAN OsnnL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Cutting-Tools, of which the following is a specification.

The present invention relates to a. cutting tool more especially adapted and intended. for use in conjunction with the cutting of screw-threads.

The principal objects of the present invention are to provide a means of mounting the tool, whereby the tool will be held in engagement with the work so as to permit a certain vibration thereof during the cutting operation, which vibration will tend to dislodge the chips which accumulate within the groove that is being cut; to provide means for enabling the tool to be retracted from cutting position and returned to cutting position in a quick and accurate manner; to provide a stop member for limiting the movement of the tool in one direction, and to form this stop member so that it also will constitute a micrometer adjusting mechanism for positioning the tool to perform the cutting operation; to arrange the holder for the tool so that when pressure is brought to bear thereon incident to the clamping of the holder into the tool, there will be no binding of the tool within the holder so as to impede its sliding movement therein; and to provide a simple form of tool which by a reversing operation will be adapted to perform either the preliminary or final cutting operation on the work.

The invention further consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawing, Figure 1 is a diagrammatic view showing the cutting tool in operative relation to a piece of work; Fig. 2 a plan view of the tool and mounting showing the tool in position for use in per forming the initiatory cutting operation; Fig. 3 a view similar to Fig. 2 showing the tool in reverse position to perform the finishing operation; Fig. e is a longitudinal section of the device of the present invention; and Fig. 5 is a section on line 55 of Fig. t looking in the direction of the arrow.

In the art to which the present invention relates, namely, that of cutting screw- Specification of Letters Patent.

Application filed July 1, 1911.

Patented Get. Mt, 1913.

Serial No. 636,444.

threads, it has been customary so far as I am aware to mount the tool in a rigid stationary manner, and it has been frequently found that during the cutting operation an accumulation of chips or other debris will occur in the groove which is being out which accumulation will impede the progress of the tool, and in fact will jam the tool so as to force it deeper into the cut, and naturally spoil the thread.

One of the primary objects of the present invention is to overcome this difliculty, and the method employed is to hold the tool int-o engagement with the work in a manner whereby a certain vibratory motion will be allowed which will tend to throw the chips or other accumulation out of the groove being out whereby the tool will. not be impeded in its cutting operation, and a smooth even cut will result.

In the form of my invention which I have used for the purpose of illustrating the same, I have shown the tool in conjunction with a lathe mechanism 6 which is of any ordinary and well known type of construction, and is provided with a clamp 7 adapted to retain a piece of work 8. Although the invention is illustrated as being used in conjunction with a lathe, I do not want this to be considered as a limitation of the scope thereof, but desire it to be understood that the tool can be used in conjunction with any other form of mechanism or device which would be practical.

As shown, the tool of the present invention is mounted within a clamp 9 of any ordinary suitable construction, and the tool itself consists of a holder 10 preferably rectangular in cross section, and is in the nature of a hollow elongated casing comprising a chambered body portion 11 and a series of upper cap plates 12. If it is found advisable, however, this holder may be made of a single piece of metal in place of the chambered body portion and cap plates.

Slidably mounted within the holder 10 is a tool mounting which consists ofan elongated rectangular member 14: which terminates at one end in a screw-threaded stem 15 and at its other end in an Lip-turned head-like member 16. The mounting is recessed, as indicated at 17 in Fig. at, for the purpose of receivin the cutting tool 18, and the tool is locked in position within nating any binding upon the tool mounting which might resultfrom the clamping of the holder in position. When pressure of the clamp is brought to bear upon the body of the holder, the compression of the metal which would naturally result therefrom will be accommodated for by the slots 20, and.

this pressure will not be transmitted to the mounting 14 which would be objectionable in that it would impede the sliding movement of the mounting within the holder and to a certain extent impair the efficiency of the tool.

It will be noted that the outer end of the holder is beveled as at 21. This is to enable the use of a relatively large head 16 and at the same time not projecting the tool too far out from the holder. This is a detail of construction, which, however, may or may not be followed, according to the idea of the mechanic constructing the device.

Mounted upon the screw threaded stem 15 is a nut 22 formed with a knurled surface 23 and a collar 24, the latter member being provided with marks 24:, spaced apart and numbered in accordance with a micrometer scale. This nut performs two functions: First, it limits the movement of the tool outwardly from the holder; and second, it provides for a micrometer adjustment of the tool in regulating the depth of the cut. An indicating mark 24* is placed on the holder 10. By turning the nut 22 until a selected mark on the collar is in alinement with the indicating mark 24 on the holder, the collar will be spaced away from the holder a distance equal. to the selected number on the collar, and hence when the member 14: is forced inward, the tool may be advanced toward the work a distance equal to the selected number on the collar. The stem 15 terminates in a knob 25 adapted to be pressed against by the hand of the operator.

The tool 18 is formed of an elongated rectangular bar-like member 26 which has one end formed to provide a cutting end 27 of any suitable character and the other end beveled to provide a cutting end 28 of any suit-ablecharacter. The end 27 is of a nature suitable for use in the initial cutting operation for the purpose of marking or tracing the line of cut and is in the nature of a roughing tool; the beveled end 28 is utilized in the final operation for the purpose of completing the screw-thread cutting operation, and is in the nature of a finishing tool.

By utilizing a tool having a different form of cutting edge at each end, I am enabled to perform the initiatory cutting operation, and then by a simple reversal of the tool complete the cutting operation, thus saving time and trouble which is ordinarily necessary in taking out one tool and substituting another.

The operation is as follows: The tool is first placed in the position shown in Fig. 2 with the initiatory cutting or roughing tool edge outward. The micrometer adjustment is then manipulated to bring the tool into proper engagement with the work, and the operator by pressing with his hand upon the knob 25 maintains the tool in position with the work. By maintaining the tool in engagement with the work by this form of pressure, which is of a resilient nature, the tool is allowed a certain amount of vibratory movement during the cutting operation. Of course, the vibration which will be set up in the tool is scarcely appreciable amounting to a very small fraction of an inch, and the vibration will not be great enough to in any way affect the efficiency of the cutting operation, but it will be sufficient to dislodge the chips or other accumulations from within the groove which is being out; and hence, the tool will have an unimpeded progress during the cutting c eration and no binding or other undesirable action will occur which, as heretofore stated, frequently results in the spoiling of the work. After the initial cutting operation has been performed, the tool is reversed so as to bring the tapered cutting edge 28 outward and the final cutting operation is performed. During this final cutting operation, the tool is held in engagement with the work by manual pressure, so that the same vibratory movement is permitted which was discussed in conjunction with the first cutting operation. When it is desired to withdraw the tool from one end ofthe cut and return it to the other, this can be quickly and easily accomplished by first pulling the tool mounting b ack and re tracting it from engagement with the work then sliding the tool mounting to the other end of the cut and then pushing the tool again into engagement with the work. By adjusting the nut 22, any selected micrometer adjustment can be made after the tool has been returned to starting position and the cutter moved deeper into the work. By this method of operation, the return of the tool is quickly and easily accomplished and the adjustment of the tool to perform the different depths of cut is accurately made. The tool is limited in its movement within the holder in one direction by the nut 22 and in the opposite direction by the head 16, so that an accurate and positive stop for the tool in either direction is provided.

It is understood that the knob 25 is preferably removably secured to the stem 15 so that by removing this knob and the nut 22 the entire tool mounting may be withdrawn from the holder. It is also understood that the vibratory movement referred to in the specification and claims means a rectilinear movement to and from the work, and not a sidewise or circular movement.

I claim:

1. In a tool for cutting screw-threads, the combination of a tool mounting, a holder having transverse slots therein, said mounting having a free sliding movement in said holder, whereby said mounting may be yieldingly held projected from the rear of the holder to permit a yielding movement of the tool during the cutting operation, substantially as described.

2. In a tool for cutting screw-threads, the combination of a tool mounting, a holder having transverse slots therein, said mounting having a free sliding movement in said holder, and said mounting terminating in a hand piece against which the operator presses during the cutting operation, whereby the mounting is projected from the rear of the holder and the tool held in yielding engagement with the work by manual pressure, substantially as described.

3. In a tool for cutting screw-threads, the combination of. a tool mounting, a holder having transverse slots therein, said mounting having a free sliding movement in said holder, and means for enabling the mount ing to be held in projected position from the rear of the holder, whereby a yielding of the tool is permitted during the cutting operation, substantially as described.

4. In a tool for cutting screw-threads, the combination of a tool mounting, a holder in which said mounting has a free sliding movement, means permitting said mounting to be held projected from the rear of the holder by a resilient pressure, whereby said tool is held in yielding engagement with the work, an adjustable member for limiting the projection of the tool mounting, and a scale to indicate the amount of projection of said mounting, substantially as described.

5. In a tool for cutting screw-threads, the combination of a tool mounting, a holder in which said mounting has a free sliding movement, a threaded stem on the front end of the mounting, a rotatable member on said stem for limiting the sliding movements of the mounting, said member being provided with a collar marked to provide a micrometer scale, and said holder having an index member for said scale, substantially as described.

6. In a tool for cutting screw-threads, the combination of a holder having a polygonalshaped opening extending longitudinally therethrough, a tool mounting .having a free sliding movement in said opening and of a configuration corresponding to the configuration of said opening, said mounting being of a unitary formation and of a length to project beyond the ends of the holder, an operating handle on the end of the mounting, a threaded nut on the mounting interosed between the rear end of the holder and the handle, said nut being of less width than the distance between the rear end of the holder and the handle, whereby said mounting is projected rearwardly from the holder and held in yielding engagement with the work solely by manual pressure, substantially as described.

7 In a tool for cutting screw-threads, the combination of a holder having a polygonalshaped opening extending longitudinally therethrough, a tool mounting having a free sliding movement in said opening and of a configuration corresponding to the configuration of said opening, said mounting being of a unitary formation and of a length to project beyond the ends of the holder, an operating handle on the end of the mounting, a threaded nut on the mounting interposed between the rear end of the holder and the handle, said nut being of less width than the distance between the rear end of the holder and the handle, whereby said mounting is projected rearwardly from the holder and held in yielding engagement with the work solely by manual pressure, and means for adjusting the tool with respect to the mounting, substantially as described.

8. In a tool for cutting screw-threads, the combination of a tool holder in which the tool has a normal free sliding movement, said holder being configured on its forward end to slope back from the lower to the upper side thereof, means for preventing rotative movement of the tool with respect to the holder during said sliding move ments, and means for enabling the tool to be yieldingly held in projected position from the rear of the holder, whereby a yielding movement of the tool in a straight line radially of the work is permitted during the cut-ting operation, said holder being fixed with respect to the movements of the tool, substantially as described.

WILLIAM J. VAN OSDEL.

WVitnesses:

WM. P. Bonn, It. L. EDDY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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