US1253594A - Drilling-machine. - Google Patents

Description

1i i E E l; 1 e4 J. B. NASTY.

DRILLING MACHINE.

APPLICATION FILED JULY 30.1915.

Patented Jan. l5 1918.,

3 SHEETS-SHEET I- c I /1 q 50 4s I. B. HASTY.

DRILLING MACHINE.

APPLICATION FILED JULY 30. I9I5- l gmfiwo Patented Jan, 1918,

3 SHEETS-SHEET 2n I II II J. B. HASTY.

DRlLLING MACHINE.

APPLICATION FILED JULY 30.1915.

1 253 5@% D Patented Jan. 15:, 1918.

3 SHEETS-SHEET 3.

Jfiwemfarl JOHN B. HASH, OF SAN BERNARJDINO, CALIFORNIA.

DRILLING-MACHINE.

specification of Letters Patent.

Patented Jan. 115, 19318.

Application filed July 30, 1915. Serial No. %2,884.

To all whom it may concern:

Be it known that 1, JOHN B. HASTY, a citizen of the United States, and resident of San Bernardino, in the county of San Bernardino and State of California, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a description, reference being had to the accompanying drawings, which form a part of my specification.

My invention relates to a drilling machine more especially intended for drilling staybolts; having for its object the provision of a machine wherein the chucks for clamping the stay-bolts will be self-centering and adapted to receive any size stay-bolt.

Another object of my invention is to provide a drill press or machine of the class referred to adapted to provide a constant feed and quick release of the drill-controlling mechanism, whereby a considerable number of bolts may be operated upon during each operation of the machine.

A further object of my invention is to provide a construction provided with a number of drills adapted to be pneumatically operated, while one of the drills is arranged to be manually operated or controlled; the construction being such that the chips or removed portions of metal may be allowed to drop out of the machine and away from the bolts and drills.

The invention contemplates means for supporting the drills during their operation; and provide a construction which will be highly eiiicient and capable to withstand the strains to which a machine of this class is subjected; the invention possessing other advantages inherent in the construction and which will be readily apparent from the following detailed description thereof.

In the drawings Figure 1 is a side elevation of my improved machine.

Fig. 2 is a top plan view thereof.

Fig. 3 is a cross sectional view, taken on the line 33 of Fig. 2, looking in the direction of the arrows.

Fig. 4 is a detail sectional view, taken on the line 44 of Fig. 2, looking in the direction of the arrows.

Fig. 5 is a cross sectional view, taken on the line 5-5 of Fig. 4, looking downwardly.

Fig. 6 is a sectional View, taken on the line 66 of Fig. 2.

Fig. 7 is a detail plan view illustrating the arrangement of the driving mechanism or I gears for rotating the drill spindles of the machine. v

In the particular exemplification of my invention, as illustrated in the drawings, the machine is provided with a top plate or frame member 10 and a bottom plate or frame member 11, secured together and held in proper spaced relation by any suitable means as, for example, by the stud-bolts 12, see Fig. 1. The frame- members 10 and 11 are formed and spaced apart as described, so as to form a housing for the gearing whereby the drills are operated.

The bottom frame member 11 is provided with a suitable number of standards or legs 13 which are. shown provided with flanges at their lower ends whereby the machine may be bolted into place; the standards or legs 13 being secured to the bottom frame member 11 in any suitable manner.

Supported on the top frame member 10, by means of the posts or supporting members 14, is a chuck supporting plate the supports or posts 14 preferably having their ends threaded so as to screw into the top frame 10, while the chuck supporting plate 15 may be clamped onto the posts 14: by the nuts 16, which screw onto the upper ends of the posts 14 passing through suitable openings in the supporting plate 15.

Secured to the under surface of the bottom frame member 11 are a pair of suitable brackets 17 which are shown secured by means of bolts 18, see Fig. 3. The brackets 17 support and provide suitable bearings for the horizontally disposed drive-shaft 19, one end whereof is provided with the belt-receiving pulley 20 whereby power from any suitable source is delivered to the shaft 19, while the other end of shaft 19 is provided with a bevel gear 21 which meshes with a bevel gear 22 secured to the lower end of the vertically disposed stub-shaft 23; the stub-shaft 23 extending through and having bearing in the enlarged or boss-portions of the top and bottom frame members 10 and 11, as shown in Fig. 3.

Keyed to the vertically disposed shaft 23 and intermediate of top and bottom frame members 10- and 11 is a drive gear 24, which meshes with and drives a small gear or pinion 25 which is feathered on the mandrel or spindle 26 by means of the key 27. The key 27 extends into the longitudinal slot or keyway 26" of the spindle 26, as more clearly shown in Fig. 3. The spindle 26 extends upwardly through suitable openings rovided in the top and bottom frame mem ers 10 and 11 which openings I prefer to provide with bronze bushings 28 and 29, respectively.

The bottom frame member 11 has secured to it a spindle casing 30 which is held in place by means of the washer or flange member 31 which is screwed onto the end of the casing 30 and bolted to the bottom frame member 11 by a suitable number of bolts, as shown at 32 in Fig. 3. The lower end of the casing 30 is provided with a coupling or union nut 33, whereby the air-cylinder 34 is connected or secured to the casing 30. The lower end of the union or coupling nut 33 is preferably provided with the inwardly extending wall or diaphragm 33 a short distance from the lower orifice of the nut; the wall or diaphragm 33 being provided with a central opening for the passage of the piston-rod 35.

The piston-rod 35 is provided with a keyway, as shown at 35 in dotted lines in Fig. 3, extending substantially throughout the length of the rod; the key-way receives the end of a dowel pin 36 arranged in the union or coupling nut 33 and extending through the diaphragm 33*, as shown in Fig. 3. The dowel pin 36 will allow the piston-rod 35 to travel longitudinally of the cylinder 34, and, at the same time, prevents t e piston-rod 35 rotating about its own axis.

The upper end of the piston-rod 35 is preferably made spherical, as shown at 35*, and extends into a socket formed in the lower end of the spindle 26 so as to provide a ball and socket connection between the spindle 26 and the piston-rod 35. The connection between the spindle and the pistonrod is maintained by means of the connecting nut 37, which is preferably locked in place by means of the lock-nut 38.

The lower end of the piston-rod is shown provided with washers 39 and 40 between which is clamped a suitable packing or leather washer 41, all of which is secured to the lower end of the piston-rod by means of the cap-screw or bolt 42, see Fig. 3, so as to effect suitable air-tight connection with the inner walls of the cylinder 34. The lower end of the cylinder 34 is provided with a cap 43, shown screwed onto the end of the cylinder; the cap 43 being provided with a central threaded opening to receive the threaded end of an air-line or pipe 44.

The upper end of the spindle 26 is provided with a suitable drill-chuck 45, preferably removably secured to the spindle by being screwed onto the extended threaded end, as shown in Fig. 3. In order to provide a suitable cushion for the drill-chuck, I provide a fiber washer 46 ,above the flange of the bronze bushing 28, so that when the operating medium or air is shut off from cylinder 34 and the spindle 26 with the drill-chuck 45 allowed to descend, the impact of the descending chuck 45 will be received by the fiber washer 46 and taken off the bushing 28.

Mounted in suitable openings inthe chuck-supporting plate 15 are a suitable number of stay-bolt holding chucks, all of which are preferably of the same construction, so that description of one of the chucks will suffice for all. The stay-bolt receiving chucks consists of a main or body portion 47, the lower end whereof is slightly reduced so as to provide the shoulder 47 a which rests on the supporting plate 15, while the reduced portion extends through the opening in the plate and has its lower end threaded to receive the cap-plate or nut 48 which is provided with a flange-portion internally threaded to screw onto the end of the body-portion 47, as shown in Fig. 4. The cap-plate or nut 48 will abut against the lower surface of the supporting plate 15, and thus maintain the stay-bolt chucks in proper position on the supporting plates. The upper end of the body-portion 47 is externally threaded to receive the rotatable portion 49, which is provided with the operating handles 50, whereby the portion 49- may be rotated for the purpose of controlling the clamping portion or jaws of the chuck.

The interior of the body portion 47 adjacent the upper end thereof, is preferably tapered or beveled downwardly toward the center to receive the tapering jaws 51, which are made segmental. It is-evident from the construction shown that the beveled surfaces will cause the jaws to become centered the moment a bolt has been inserted and member 49 screwed downwardly into proper place.

I prefer to provide four jaws 51 within the body portion of each chuck, as can be seen in Fig. 2. The adjacent sides of the difi'erent jaw members 51 are provided with sockets to receive the ends of the springs 52 which are adapted to maintain the jaws in open position or spaced relation to each other when the rotatable portion 49 is screwed upwardly into releasing position; 1d

the upward movement of portion 49 tending to lift the jaws 51, freeing them of the wedging or centering action caused by the beveled internal sides of the body portion 47. The longitudinal inwardly presented surfaces of the jaws 51 are threaded, as shown at 5P, to receive the threaded bolts and thus prevent the threads on the bolts becoming injured while clamped by the jaws. The upper ends of the jaw members 51 are provided with the flanged portion 51 which may be engaged by the portion o member 49 so as to cause the jaws 51 to move with said member and also assist in maintaining them in place by means of the cap member 53, which latter is externally threaded to screw into the upper threaded end of the chuck-member 49; the member or cap 53 being provided with a large central opening, as very clearly shown in Fig. 4, to allow the bolts to be readily inserted and also receive the head of an ordinary bolt if desired.

The cap-plate or nut 48 is provided with a drill-receiving opening 48 adapted to be located centrally beneath the bolt-receiving space of the jaws, and is also provided with a series of suitable openings 48 preferably circumferentially arranged about the drill-' receiving opening 48*, see Figs. 4 and 5, to allow the drill chips or portions of metal to drop out of the chuck and away from the drill. The drill-receiving opening 48 of the cap-member 48 is preferably provided with a steel hardened bushing 48, see Fig. 4, adapted to permit the passage of the drill in its travel to the bolt; the bushing acting as a jig and support for the drill.

The body or chuck-portion 4:9 is preferably shown provided with a number of handles 50, whereby the portion 49 of the chuck may be rotated so as to open and close the chuck jaws.

In the particular arrangement of my invention, the machine is shown provided with a series of drill-chucks and stay-bolt chucks, for example five in number, the major portion or four whereof are intended to be pneumatically operated while the one is intended to be manually operated, as will be hereinafter described.

The pneumatically operated chucks receive the air, or other operating medium, by means of the pipe 54 which connects with any suitable source of supply and is provided with a suitable shut-off or valve 55, see Fig.

1. The pipe 54 communicates with the pipe 5.6 which is preferably circumferentially arranged about the frame- members 10 and 11, as shown in Figs. 1 and 2, and is provided with suitable branch lines 56 to the bottom of the different air-cylinders 34 as shown in Fig. 1. Each branch line 56 is provided with a three-way valve 57 for controlling the air supply to the cylinders; movement of valve 57 to one position allows the air to flow into the bottom of the cylinder, while movement to a second position allows the air to exhaust from the cylinder and escape through the usual exhaust port in the valve.

With power imparted to shaft 19, it is evident that driving gear 24 will constantly rotate and, in turn, impart rotation to the small gears'or pinions 25 of the different drill-chuck spindles 26, so that the operation upper bushing which lead of the valve 57 (assuming that valve 55 has previously been opened) will admit air to the bottom of the cylinder 34 and cause the piston-rod 35 to travel upwardly, thereby forcm splndle 26 with it. Spindle 26 will cause the drill, shown at 58 in Fig. l, to enter the stay-bolt chuck and come into operative contact with the end of the stay-bolt as long as the air is being admitted to the bottom of cylinder 34. By reason of the ball and socket connection between the spindle and the piston-rod, it is evident that the spindle w1ll rotate through the action of its gear 25 without imparting rotation to the piston-rod.

It will be understood, of course, that the splndles of all of the drlll-chucks will be rotated as soon as the drive-gear 24 is set in motion; and each drill will be brought into operative position or contact with the staybolt through the operation of the valve 57 which controls the respective branch line 56 of the drill intended to be placed in operatlon.

In certain operations, as, for example, where long bolts are to be drilled entirely through, it is preferable to employ the manually operated drill for completing the bore, at least for the purpose of drilling beyond a central point in the bolt, so as to obviate the possibility of the drills becoming broken.

For this reason I prefer to provide the manually operated drill, shown in Fig. 6, which comprises a spindle 59, which is similar to spindle 26 previously described and provided with the small gear or pinion 25 feathered on the spindle so as to permit vertical travel of the spindle and, at the same time, cause it to rotate with the gear, it being understood that gear 25 also meshes with the drive gear 24, as previously described. The spindle 59 extends through suitable openings in the "top and bottom frame-members l0 and 11 and is surrounded by bronze bushings 28 and 29, as previously described in connection with spindle 26; the 28 also preferably having the fiber cushion 46 to receive the impact of the drill-chuck 4.5, as previously described. The lower end of the spindle 59, like spindle 26, is provided with a socket and externally threaded to receive the cap-nut 37 which is properly locked in place by means of locknut 38, see Fig. 6. The socket, at the lower end of the spindle 59, receives the spherical head of the rod 60, the lower end whereof is pivotally secured at 61 to the hand-lever 62, which latter is fulcrumed at 63 to the brace rod or support Get which is shown screwed into the bottom frame-member 11 and provided with a jam-nut 65.

It is evident from the construction shown and described that downward pressure on the free end of lever 62 will cause it to rock on its fulcrum point 63 and induce the spindle 59 to be moved upwardly so as to bring I the drill, mounted in the chuck 45, into operative relation with the stay-bolt to be operated on'.

The drill- chucks 45, 45 may be of any standard construction, and the number of chucks will permit of a large number of bolts being drilled with each operation of the machine; the drills, with their correlated parts dropping back to inoperative position as soon as the air, or other operating medium, is shut ofi through operation of the valves 57 to release position; the construction permitting of a constant feed and quick release as is readily apparent and, at the same time, enabling any size stay-bolt to be easily placed in the chucks which will readily center themselves by reason of the construction shown and described.

I have shown and described what I believe to be the simplest and best form of my invention, but the construction may be modified in certain respects without, however, departing from the spirit of my invention, and I do not wish to be understood, therefore, as limiting myself to the exact construction shown and described, except as required by the scope of the claims.

What I claim is 1. A machine of the class described, comprising a pair of frame-members or plates disposed one above the other in spaced relation to constitute a gear-casing, said members being provided with alined openings arranged circumferentially, a series of vertically disposed drill-chucks, mounted on the upper plate in a circumferential manner with the spindles of the chucks extending through said alined openings, the spindle of each chuck being provided with gearing arranged between said members or plates, a common drive gear mounted centrally between the members on a vertically disposed stub-shaft, power-imparting means in operative relation with one end of said stub-shaft, means having ball and socket connection with the ends of the spindles whereby the latter may be moved in a vertical direction while rotating without imparting rotation to said means, a supporting member or plate mounted above said frame-members in fixed spaced relation thereto, and a series of bolt-holding chucks mounted circumferentially in said supporting member in vertical alinement with the drill-chucks.

2. A machine of the class described, comprising frame-members or plates provided with spindle-receiving openings, a series of drill-chucks rotatively mounted in said openings, a spindle-casing secured to the under surface of the bottom frame-member for incasing the spindle of each drill-chuck, an air-cylinder provided with a piston, means for connecting the air-cylinder to said spindle-casing and to prevent rotation of said both plates and rotatable therein, means mounted between the top and bottom plates in operative relation with the spindle whereby the drill-chuck is rotated, means mounted beneath the bottom plate and adapted to move the drill-chuck spindle longitudinally, and a ball and socket connection between said means and the lower end of the spindle whereby rotative movement of the spindle is permitted without imparting such movement to said means.

4. A machine of the class described, comprising a pair of horizontally disposed parallelly arranged frame -members spaced apart to constitute a gear-casing, both members being provided with alined spindle-receivin openings, a plurality of drill-chucks rotata ly mounted in said frame-members and disposed circumferentially, the drillchucks having spindles extending through the openings in said members, said spindles being provided with gears and arranged to travel vertically through the gears, a single drive member rotatably mounted between the frame-members and common to the gears of all the spindles of the drill-chucks, casings for some of the drill-chuck spindles secured beneath the bottom frame-member, air-cylinders secured to the ends of said casings and provided with pistons having ball and socket connections with their respective chuck spindles, and means whereby said chucks may be independently actuated.

5. In a machine of the class described, a frame or bed-portion composed of a top and a bottom member held in spaced relation to each other, a vertically disposed shaft mounted in said top and bottom members and provided with a drive-gear arranged intermediate of said top and bottom members, a series of rotatively mounted and vertically movable drillchucks concentrically arranged in said top and bottom frame-members about said vertically disposed shaft, said drill-chucks being arranged to be rotated by said drive-member, a horizontally disposed power-shaft mounted on the under surface of the bottom frame-member and adapted to impart power to said vertically disposed shaft, and means mounted on the under side of the bottom frame-member whereby the drill-chucks are made to travel vertically.

6. A machine of the class described, comprising, a top and a bottom frame-member maaoaa spaced apart to constitute a gear-casing, a drive-gear rotatively mounted between said frame members, a series of drill-chucks mounted in said frame-members concentri- 5 cally about said drive-gear, said drill-chucks being adapted to be rotated by said drivegear, all of said drill-chucks being provided with spindles extending through sald framemembers and arranged to travel vertically,

spindle-casings secured to the bottom framemember, cushioning means for said drillchucks, and a series of bolt-receiving chucks held in spaced position above the drillchucks.

JOHN B. HASTY. Witnesses:

F. A. LEONARD, CECIL H. PHILLIPS.

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