US426347A - Drilling-machine - Google Patents

Description

(No Model.)` 2 Sheets- Sheet 1. D. E. & L. E. WHITON.

DRILLING MACHNB.

Patented Apr. 22, 1890.

UNITED STATES PATENT OFFICE.

DAVID E.v VHITON AND LUCIUSE. WIII'ION, OF NEVV LONDON, CONNECTICUT.

DRILLING-MACHINE.

SPECIFICATION forming part Of Letters Patent NO. 426,347, dated April 22, 1890'.

Application led February 4, 1889. Serial No.298,677 (No model.)

To all wiz/om it may concern:

Be it known that we, DAVID E. WHITON and LUCIUS E. VHITON, citizens of the United States, residing at New London, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in CenterDrilling-IVIachines, of which the following is a specification.

Our invention relates to that class of machines in which rods or other work are prepared for turning, and which are commonly provided with a laterally-movablehead havlng two spindles, one of which carries a drill and the other a reamer; but many of its details may also be advantageously applied to ordinary drilling-machines having two or more spindles.

Our invention has for its object the simplification of construction and the promotion of accuracy and convenience in the performance of such work.

In the drawings accompanying and form- 1ng part of this specification, Figure I is a plan view of a machine embodying our improvements with a portion of the cap removed, and showing one of the spindles. Fig. II is a sectional elevation of the front or working side. Fig. III is a plan view of the intermediate or base piece which carries the swinging head. Fig. IV is a side elevation of a modified form of the laterally-moving head. Fig. V is a cross-section of the head on line lml n of Fig. II, it being assumed that one spindle is moved forward for the performance of its work. Fig. VI is a plan view of the under side of the laterally-swinging head, the spindles and gear-racks being removed. Fig. VII is an end elevation of the adjustable rest, work, and a portion of the bed, taken from the left of the machine. Fig. VIII is an end elevation of the vise, taken from its right, showing the oiling device and stop for the work. Fig. IX is a view of the supplemental opposing and supporting jaws of the vise. Fig. X is a detail view on line .'15 of Fig. II.

Similar characters are used to indicate like parts in all the drawings.

The working parts may be mounted upon a frame or bed of any convenient construction, supported upon legs or otherwise, such a bed being designated throughout the drawings by A. Said bed may be direct-ly provided with pivot-journals B, Figs. II and III, for pivot ally supporting a lat-eraly-swinging head, or

with guideways A A', Fig. IV, extending transversely across the bed to support and guide alaterally-sliding head, or instead of the bed having formed directly thereon supports for the head, as the pivots B3 and bearings B or guideways A it may be provided with an intermediate piece B, provided with such pivot-journals or crossways at option. We prefer to use the intermediate piece in the case of the swinging head, becausev interchangeable construction may be effected thereby with less cumbrous fixtures or jigs. A swinging head C, carrying spindles, is pivoted in these journals B and is free to swing laterally in either direction far enough to bring each of its spindles successively to an operative position on the same line, the machine being so organized that this line is a prolongation of the center line of the work, and indicated by y, Figs. I and II. Said swinging head is provided at one end with bearings C, within which spindles D are free to revolve and slide endwise, and at the other end with bearings C2, of larger diameter, in which journals E2 of pinions E may revolve. It has a single cap C3 for these bearings to permit the insertion of the spindles. Said cap has a convenient handle C4, by which the head may be moved laterally. These journals E2 of the pinions E are hollow and are prevented from endwise motion by shoulders E', Fig. II. They are mounted around the spindles D, and serve to transmit rotary motion to said spindles by means of keys Qc, Fig. X, and leyways in the ordinary manner of such constructions,leaving said spindles free to move endwise independently of their rotary motion. Between bearings C and C2 the swinging head is chambered or bored out to a diameter larger than said bearings to permit end motion of collars D with which spindles D are provided7 and to receive sliders F, which communicate end motion to said spindles. These chambers C5 of swinging head are made enough longer than that portion of the spindles between the outsides of collars D to permit the required amount of end movement in the spindles. The advance of the spindles will thus be lim- IOO ited by the abutment of the collars D' against the shoulders C6. Between these shoulders and the bearings C' a further chamber C7 is provided of smaller diameter than chamber C5, within which spiral springs D2, mounted around the spindles in a manner tending normally to hold said spindles in their withdrawn postion,may be compressed by the forced advance of the spindles. In the bottoms of the chambers C5 slots C2, Figs. II and IV, are made, through which sliders F, having sections of rack-teeth F', protrude. It will be seen that said sections of rack may consist of but one or more teeth, at option.` These slid-- ers are so mounted in said chambers as to be in contact with the collars D', Fig. II, of the spindles and are free to move endwise, but are prevented from turning with the spindles by their engagement with the slots CS, Fig. V. It will be seen that any endwise motion which they may receive will be transmitted to their respective spindles through their contact with the collars D. In order that said sliders may receive endwise motion,a pinion G is pivoted at such distance below the swinging head in the intermediate piece B or bed A, at option, that its teeth may become successively engaged with the teeth of the various sliders F, only one of which is shown in Fig. V. This pinion G is without lateral movement, being pivoted in the slot B2 of the fixed base B, but is capable of rotary movement by means of the hand-wheel H or otherwise. In case the head lis supported by the first described method-that is, the pivots Brol and journals B', whereby it has pivotal swinging movement-the teeth of the pinion G may be curved with a radius corresponding to the distance of the rack-teeth of the sliders F from the pivot-line of the swinging head, or in case i the head is arranged-to slide laterally on the ways A', Fig. IV, they may be left straight. Thus in either case their contour may be made to correspond with the lateral path j through which said rack-teeth F' move.

In order that the laterally-moving head may be held in the required position during the successive operation of its various spindles, and in order to prevent all lateral movement of the head except at times when the operating-spindle is wholly withdrawn from its work, the feeding-pinion G is made in a mutilated or segmental form, as shown, and is so placed with reference to the rack-teeth of the sliders F that its front radial surface G' may stand in an approximately vertical position when the spindles are so withdrawn. The under side of the laterally-moving head is provided with projecting lugs C9, of such length as to permit the lateral movement of the head in front of the segmental pinion G when its forward radial surface is in a vertical position, but to preclude such lateral movement at times when said pinion and connecting-spindle are advanced. Between said lugsC9 are slots C10, which are eXtensions of slots C8 carrying the sliders F, into which slots the pinion G may advance in certain positions, 'such positions'being so located as to bring the corresponding spindles to their operative position. Assuming that the width of these slots C10 corresponds to the thickness of the pinion G, it will be'seen that said pinion and its connecting-spindle can only be advanced when in an operative position; also, assuming. that said pinion and spindle are advanced, it will be seen that no lateral movement of the head can occur. In order that the spindles D may receive rotary motion through their pinions E, one of the pivots B2. upon which the head swings is eX- tended and forms'a journal. A pulley I, carrying pinions I' of proper size to mesh with the pinions E, is caused to revolve upon this journal by means of a belt. Power is thus transmitted to the spindles in any position which they may occupy. It is obvious that friction-disks or any analogous device may be employed in place of the pinions E and I' within the scope of oury invention. For

the convenient indication to the workman' that the head has received sufficient lateral movement stops J are provided, `against which the head may be moved by, means of handle C4, said stops being adjusted tol correspond with the proper position of the slots C10 underneath the head.

For the purpose of gripping the work a vise is mounted upon-the bed, -and for convenience is capable of longitudinal movement thereon and may be clamped at any desired point. This vise has opposing. gripping-jaws K. K', slidingon ways L L', which approach or recede from each other, by the action of a right-and-left screw in the, ordinary manner. Said vise has also supplemental opposing jaws K2 K2, moving simultaneously with said gripping-jaws, which serve as a V-shaped rest or support for the work, and which in closing automatically lift the work to a central position, corresponding to the position inwhich the work will be held by the gripping-jaws; A supporting-rest is provided at the left of the vise, which is also capable of longitudinal movement and clamping at any convenient point upon the bed of the machine. Said rest is provided with opposing supporting-jaws M M', moved by a right-and-left screw in the same manner asthe jaws of the vise, and mechanically resembles the vise in all respects, except that it is without gripping-jaws, having only supporting-jaws tending to lift the work in the same manner as the supplemental jaws K2 K3 of the vise. The actuating-screws of the vise and rest being connected by gears N and shaft v`N', as shown, it is clear that automatically-adjustingV-shaped slupportsfor each end of the work are provided bythe opposing jaws M M' of the rest andthe supplementall jaws K2 K3 of the vise. rlphe shaft to be centered is therefore simply laid in the two` V-shaped supports, and there remains no necessity for the IOO IIO

while adjusting it in the grippingjaws,which in work of the heavier class is a matter of much inconvenience. The work being thus supported in the rests, it is moved forward through the gripping-jaws of the vise, which are' then clamped upon it and the drilling may be performed.

In the'performance of work of this class it isof frequent importance' that the reaming be not carried to too great a depth, as this unnecessarily enlarges the diameter of the recess in the end of the finished piece and in jures the neatness of its appearance. It is also of frequent importance that many piecesv be reamed to the same depth, and in all cases the cutting-tools require to be supplied with oil or other lubrication in order to the best performace of their work. These results are achieved in our machine as follows: It being previously7 understood that the advance of the drilling-spindles D is limited by the abutment of collars D against shoulders C6, it is clear that the advance of the cutting-tools carried by said spindles is also thus limit-ed. A cross-bar or stop-plate O, provided with an oil-receptacle O and channel O2, by which the oil is carried directly to the end of the work being drilled, is pivoted upon the frame of the vise at L2,andis so located that itmaybeswung into or away from the path of the Work in its advance through the gripping-jaws toward the spindle and latched in place at L3. An adjustable stop P is provided, by means of which the approach of the vise carrying the stop-plate O toward the drilling-head may also be limited.' It is clear that stop P may be so set as to permit such approach of the vise that the work abutting against its stop-plate O will come sufficiently far into the path of the cutting-tool to be reamed to the desired depth without danger of being drilled 0r reamedv beyond such desired depth; also, in special cases, if the stop-plate O be swung out of the path of the work, the work itself may be advanced through the vise far enough to receive any desired depth of reaming without interference with the adjustment of the stop P, which may remain properly set for the Inajority of the work required. It is obvious that many constructions by means of which this stop-plate O may be adjustably interposed between the work and spindle are possible within the scope of our invention thus outlined, the method shown being simply a convenient mode of its application.

In operation, the work having been gripped in the vise, as above described, and the spindles being in rotation, the swinging head is brought into the proper position by means of handle C4, when the first cutting-tool is caused to advance by the movement of pinion G, as described. This cutting-tool having advanced to its limit, it is permitted to withdraw bythe action of the spring upon its spindle, when the head is moved laterally, as required, and the second spindle is caused to act in a similar manner, and so successively through the series if Vmore than two spindles are employed. The work may then be removed and other work inserted, when the operations are repeated.

We are aware that special combinations in machines embodying the general principles of a gripping-vise, a laterally-movable head with advancing spindles, a feeding-lever pivoted in various ways upon said laterally-moving head and which serves at the same time to move said head, and a separate lock or de` tent operated by said lever have been patented; but we are not aware that machines of this class have been devised embodying automatically-adjusted supporting-rests for each end of the work before gripping in the vise or embodying devices by means of which many pieces may be drilled and reamed to the same depth, or devices 'by means of which the laterally-movable head is firmly locked without additional pieces.

Having thus described our invention and shown wherein its features differ from those of machines most nearly approaching it in design and arrangement, we claiml. The combination, in a drilling-machina of a laterally-movable head carrying two or more revolving and sliding spindles and two or more sliders having sections of gear-rack in contact with shoulders upon said spindles, and a pinion without lateral movement, but capable of rotary movement and engagement with said sections of gear-rack, the whole being so organized and arranged that the various spindlesl may successively receive endwise movement by the rotation of the single pinion, all substantially as described.

2. The combination, in a drilling-machine, of a laterally-movable head carrying two or more revolving and sliding spindles and pro vided with a series of slots arranged to tem porarily hold the head in a fixed position, in combination with a segmental or mutilated pinion without lateral movement, but capable of rotary movement and engagement with said slots, all substantially as described.

3. The combination, in a drilling-machine head, of two or more spindles D,two or more sliders F, independent of said spindles, but in contact with shoulders upon said spindles, two or more spiral springs D2, tending non mally to prevent end motion of said spindles, and two or more pinions E, mounted within said head and around said spindles in such a manner that said spindles may receive rotary motion therefrom and at the same time be capable of endwise motion, all substantially as described.

4. The combination, in a drilling-machine, of a plate or bedpiece provided with pivotjournals B', a laterally-swinging head pivoted in said journals carrying two or more revolving and sliding spindles provided with pinions to receive rotary motion, and a pulley provided with driving-pinions or frictiondisks so journaled upon one of the pivots of said swinging head as to transmit rotary mo- ICO IIO

tion'to the spind1es,'all arranged and operating substantially as described.-

5. The combination, in a drilling-machine, of two or more revolving and sliding spindles having collars D with a laterally-movable head carrying said spindles and proj vided with two or more shoulders C, to limit the advance of the sliding spindles, and two or more slots C8, to receive and hold sliders having sections of gear-rack, substantially as described.

6. The combination, in avise for a drillingmachine, of two opposing jaws K K', for gripping the work, and two supplemental opposing jaws K2 K3, acting simultaneously with said gripping-jaws as supports for the work, substantially as described.

7. The combination, in a drilling-machine, of a vise for holding the work, movable longitudinally upon the bed of the drilling-machine and provided with a cross-bar or stopplate O for the work, and anadjustable stop P, whereby Jthe approach of the vise with its stop-plate O toward the head of the drillingmachine may be limited, arranged and operating substantially as described.

8. The combination, in a drilling-machine of the class described, with the gripping-jaws of the vise and traversing spindle of the drilling-head, of a cross-bar, plate, or projection so located. and attached tothe adjacent parts -astofcome inthe path. of 'work held in the cated and pivotally attached to the adjacent partsasto be swung into thepath of work held inthe vise tolimit its approach toward the drilling-head and at the same time supply oil to the cutting-tool, substantially as described.

lO. The combination, in a center drilling-machine, of a longitudinally-movable vise conlsisting of opposing jaws K K, movable toward and from each other, a rest consisting of opposing jawsM M movable toward and from .each other,and means for moving all the jaws simultaneously, substantially as described.

DAVID E. WHITON. LUCIUS E. WHITON.

Witnesses ERNEST L.-WH1roN, MERRILL WHITON.

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