US781851A - Tool holding and adjusting mechanism. - Google Patents

Description

PATENTED FEB. 7, 1905. I. W. TAYLOR & S. NEWBOLD.

TOOL HOLDING AND ADJUSTING MECHANISM.

APPLICATION FILED FEB. 23, 1901.

Patented February 7, 1905.

FREDERICK ll". TAYLOR, OF SOUTH BETHLEHEM, AND SIDNEY NEWBOLD,

OF BETHLEHEM,

PENNSYLVANIA.

TOOL HOLDING AND ADJUSTING MECHANISM.

SPECIFICATION formingpart of Letters Patent No. 781,851, dated February 7, 1905.

Application filed February 23,1901. Serial No. 48,398.

To all who/It it may (o/warn.-

Be it known that we, FREDERICK \V. TAY- Lon, residing in South Bethlehem, and SID- NEY NEwnoLD, residing in Bethlehem, in the county of Northampton and State of Pennsylvania, citizens of the United States, have invented a certain new and useful Improvement in Tool Holding and Adjusting Mechanism, of which the following is a true and exact description, reference being had to the accompanying drawings,which form apart thereof.

Our invention relates to metal-cutting machinery of the kind in which a moving part of the machine is equipped with a multiple series of cutting-tools arranged to act successively upon the work. In the operation of such metal-cutting tool it is of the utmost importance that the cutting-tools should be so placed and arranged that each tool shall have as nearly as possible exactly the same depth of cut and amount of work as all of the others, as in this way the machine can be used to its maximum efficiency, while, on the other hand, if one of the tools has a greater amount of work thrown upon it the cutting speed of the whole machine must be reduced within the limit of safe operation. for the one tool, and thus each of the other tools of the series made to operate at a speed considerably below that of which they are capable.

The object of our invention is to provide simple and efiicient means for adjusting and securely holding each individual tool in the moving part to which all the tools are secured. so that accurate spacing of the whole series can be secured and the machine thus rendered capable of working with the greatest possible efficiency.

hile our invention is adapted for use in many kinds of cutting-machines having multiple series of cutting-tools, it is especially valuable as applied to rotary planers, in connection with which class of machines we prefer to use it with a detachable head.

The nature of our improvements both as to the adjustment of the tools in the head and as to the detachability of such heads will be best understood as described in connection with the drawings, in which they are illustrated, and in which Figure l is a face view of the annular head of a rotary planing-machine provided with our improved devices for holding and adjusting the tools and for attaching it to the driving mechanism. Fig. 2 is aside elevation on thesectionline 2 2 of Fig. 1. Fig. 3 is a similar sectional elevation showing a slightly-modilied formof tool holding and adjusting mechanism. Fig. 4: is a sectional elevation of the tool-holding head and of a corresponding part of the driving-disk, the parts being separated; and Fig. 5 is a plan view showing the key for preventing slipping of the tool-holding head on the driving-disk.

A indicates the su morting-shaft, to which is attached the d riving-disk B, 1/ indicating a key securing the parts together. The disk B is provided with an annular shoulder B, projecting from its rear face, and is also formed with an annular flat face B and a 'frustoconical face B.

C is an annular rim made to lit against the outside of the annular flange .B' and formed integrally with an internally-toothed gearwheel, (indicated at C.) The annular rim O is attached to the driving-disk B, as by means of bolts, (indicated in dotted lines at L L, Fig. 1,) and the gear-wheel U, together with the disk B, is driven, as shown, by a gear-wheel K, attached to the end of the driving-spiinlle K.

D (see Figs. 4 and 5) is a feather or spline set in and projecting out from the annular face B of the disk B.

E is the tool-holding head of the planer. It is formed with a frusto-conical bearingface E, adapted to make a nice lit with the corresponding face B of the driving-disk, and with an inwardly-cxtending annular flange E corresponding to the face B of the driving-disk. The face of the flange E is slotted, as indicated 8.1313 Figs. at and to receive the spline or splines I), said spline and slot r" being preferably made with angularwalls, as indicated in Fig. 5, and the head and disk are held together by boltsJ. By very nice workmanship the frusto-conical and piano faces of the disk and head may be made to contact and form a close fit; but it is of course of main importance that the frusto-conical faces should be in contact, as this effects the centering of the cutting-head, and we have sometimes found it advisable to use adjustingscrews, as indicated at M M, Fig. 1, to help in pulling off the cutting-head.

Returning to the construction of the cuttinghead, E E &c., indicate tool-receiving slots or openings formed in the head at equal distances apart, each adapted to receive a portion of a cutting-tool and to give suflicient room for such movement of the tool in the slot or opening as may be necessary for its proper adjustment. One face, as the bottom face 9 of each opening is preferably made at an angle to the opposite face and so as to receive an adjusting-wedge, the opposite face of which will be substantially parallel to the opposing face of the opening.

E" E* indicate threaded perforations, preferably two of which extend into each tool-re ceiving operture or opening.

E Figs. 2 and L, indicates bolt-holes, one of which extends transversely through the head beneath each tool-receiving aperture.

E, Fig. 3, indicates a bolt supporting bracket extending from the outer face of the head, one below and in front of each tool-receiving aperture.

F F, &c., indicate the metal-cutting tools, the bodies F of which extend into the apertures or openings in the head, as shown.

G G are wedges lying on one face of each aperture and supporting on their free faces the tool portions F'. These wedges are adjustable, as shown in Fig. 2, each having a downwardly-extending lug G, through which extends a threaded portion of a bolt H, supported in the transverse perforation E and by turning which bolt the wedge is made to advance or recede at will. In the modification shown in Fig. 3 the threaded portion of the bolt is made to screw into a threaded perforation in the wedge. Said bolt being held from longitudinal movement in the bracket E will when turned move the wedge either forward or backward, as desired.

I I indicate clamping screws working through the threaded perforations E* and acting, in connection with the wedge Gr, to firmly secure the tools in the head. It is of course obvious that the tool has considerable freedom of adjustment in the aperture or opening in which it is placed and that it may be firmly secured in any adjustment by means of the clamping-screws.

While we believe the special device of adjustable Wedge and clamping-screws illustrated to be that best adapted for our purposes, it will be understood that in a broad sense we do not wish to limit our claims on this special mechanism to the exclusion of other known and broadly equivalent devices.

In practice we prefer to adjust and secure the tools in the head while it is separated from the driving-disk, and by means of the described devices for securing the head and disk together we can with the least possible loss of time substitute one head for another, this substitution being made With the minimum amount of labor, as the frusto-conical bearing-faces bring the parts into direct position almost automatically.

Having now described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a metal-cutting machine, a rotating cylindrical head having an annular series of transverse openings, E running parallel to the axis of rotation, to receive the ends of metal-cutting tools, said openings being of such shape and dimensions as to permit of the adjustment of the tools therein toward and away from the center of the head, in combination with a series of adjusting and clamping wedges Gr, one working in each opening E and adjustable coacting clamping mechanism also situated in each opening.

2. In a metal-cutting machine, a rotating.

cylindrical head, having an annular series of transverse openings, E running parallel to the axis of rotation, to receive the ends of metal-cutting tools, said openings being of such. shape and dimensions as to permit of the adjustment of the tools therein toward and away from the center of the head, in combination with a series of adjusting and clamping wedges G, one Working in each opening E and set-screws I, I, for securing the tool ends in contact with the wedges.

FREDERICK WV. TAYLOR. SIDNEY NEWBOLD.

Witnesses:

DAVID C. FENNER, JAMEs HENNESY.

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