US1203708A - Milling and routing machine. - Google Patents

Description

F. DAVIES.

MILLING AND ROUTING MACHINE. APPLICATION mm MAY 15, 1916.

Patented Nov. 7, 1916. 3 SHEETS-SHEET I- FlG 1:-.

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5 4\ z m & mm? 3. 4 m 3 Q "1 5- F. DAVIES. MILLING AND ROUTING MACHINE. APPLICATION FILED MAY I5. ISIS.

I Patented Now 7 1916.

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' WITNESSES;

F. DAVIES.

MILLING AND ROUTING MACHINE.

APPLICATION FILED MAY 15. I9I6.

1,203,708. Patented Nov. 7, 1916.

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MIME/vial? UNITE FRANCIS DAVIE S, OF PHILADELPHIA, PENNSYLVANIA.

MILLING AND ROUTING MACHINE.

Specification of Letters Patent.

Patented Nov. 7, 19136.

Application filed May 15, 1916. Serial No. 97,542.

To all whom it may concern Be it known that I, FRANCIS DAVIES, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful'Improvement in Milling and Routing Machines, of which improvement the following is a specification. My invention more particularly relates to means for milling powder train grooves in timing rings for explosive projectile fuses,- and its object is to provide mechanism for that purpose which shall be of simple and inexpensive construction and have the capacity of more rapid and accurate work in cutting grooves of precisely determined length, diameter, and width, than has heretofore been found practicable, and by which the rotative feed shall be automatically stopped at the instant the groove is cut to the exact desired'length. y

The improvement claimed is hereinafter fully set forth. I

In the accompanying drawings: Figure 1 is an end view, partly inelevationand partly in transverse section on the line 00 w of Fig.

2, of a milling and routing machine illustrating an embodiment of my invention; ig. 2, a vertical longitudinal and substantially central section through the same; Fig. 3, a

verticaltransverse section, on the line y 3 of F Fi 4,1 Pl n or top V w, P y in section onthe line a 2 of Fig. 1; Fig. 5, a front view, in elevation, of the means for actuating the milling cutter slide supporting member; Fig. 6, a vertical longitudinal section, on an enlarged scale, through the fuse ringchuck and its bearing Fig. 7, a front view of the same; Fig. 8, a plan view of the same; Fig. 9, a partial horizontal section through the same; Fig. 10, a front view of the ring chuck cam; Fig. 11,- a view, partly in elevation and partly insection, of a chuck cam support; Fig. 12, a front view of a graduated fuse timing ring, and, Fig. 13, a transverse section through the same.

In the practice of my invention, referring to the specific embodiment thereof which is herein exemplified, I provide abed or supporting frame,- 1, having a horizontally disposed cylindrical slide bearing, 1, formed on its top, at and adjacent to one of its ends, and located at predetermined distance above transversely extending bearings, 1 1, on which ahead stock, 2, is

supported at and adjacent to its opposite I by a clamp lever,

.of the spindle, said wheel engaging a end, with the capacity of lateral adjustment, relatively to the axis of the slide bearing, 1 The head stock, 2, is securely fastened to the bed, in any desired position into .which'it may be moved, by vertical clamp bolts, 2, the lateral movement of the head stock being effected by horizontal adjusting screws, 10, of which, is parallel with the bearin a of the bed.

A rotatory cutter, 4, is supported axially 1n,and fastened by a cutter chuck, 5, to, a cutter splndle, 6, in the usualmanner. The cut- 3, the chuck spindle bearing,

ter spindle, 6, carries, .onfits outer end, a

driving pulley, 6 which is rotated by any suitable prime mover, and is j ournaled in a cylindrical bearing, 7, which is fitted movable longitudinally in the slide bearing, 1*, and is adjustable therein by a crank, 8 formed on a shaft,'8, which is journaled,

and

transversely to the cutter spindle, in a bearing, 8*, secured to the slide bearing, 1 The crank, 8 engages a recess, 7, in the cylindrical bearing and the crank shaft is swung in its bearing by a lever, 8. This construction provides for longitudinally moving the cutter, 4, into its cutting position, when forming a groove, 9*, in a graduated fuse timing ring, 9, when .held in the chuck ring, 10, as hereinafter. described. Stop sleeve nuts, 11, engaging external threads on the bearing, 7, enable the latter and the cutter, 4, carried therein, cutter to form a groove of desired depth, when turned to abut on the outer end of the slide bearing, 1*. The slidingbearing, 7 is clamped in the adjusted position corresponding with the cutting position-of the cutter,

12, in the usualmanner. A. ring chuck, 10, having a threaded shank, .10", is secured, by said shank, to a chuck spindle, 10*, which is journaled longitudinally in thetop of the head stock, 2,

the ring chuck being fixedon the end of the spindle. which faces the cutter, 4. A feed worm wheel, 13, is keyed to the oppositefend eed worm, 213?, which carries a miter gear, 14, engaging a similar gear, -14. The gear, 14, is fixed to a driving pulley, 15, and, with said pulley, is mounted to rotate on a fixed journal bearing, 16, which is rigidly sup ported in a lateral bracket, 2*, formed on the headstock, 2 The pulley, 15, is rotated by any suitable prime mover, at a speed to bo adjusted to cause the which will impart the proper rotative feed speed to the ring chuck, 10. The journal bearing, 16, also forms a-pivotal support for the worm, 13, and the bearing bracket, 13, in which it is mounted, in such manner as to provide an effective feed releasing gear, which is actuated at the instant the ring chuck has rotated sufficiently far to give the proper length to the groove, 9, of the fuse timing ring, 9, which is being operated on. A tripping dog, 19, which is se cured to the worm wheel, 13, rotates with the ring chuck, and is positioned, relatively thereto, so as to come in contact with a trip 1 pin, 17, at the instant that the cutter, 4;. has

given proper and precise length to the groove of the fuse timing ring. The trip 3111 17 is connected to the shorter arm of a bell crank trip lever, 18, journaled on a pin, 18*, fixed in the worm casing, 2 the longer arm of which trip lever normally abuts against a bracket arm, 13 projecting upwardly from the worm casing, 13".

The movement of the pin, 17, which is multiplied by the longer arm of the trip lever, 18, releases the upper hardened end of the bracket arm, 13 from engagement with the trip lever, and the weight of the bracket arm instantly disengages the worm from the worm wheel, by swinging. downwardly about the fixed journal bearing, 16, to which it is coupled by the gear casing cap, 20, and cap bolts, 20 A lifting handle, 21, which is screwed into the worm casing, and abuts against the end of the worm, provides for longitudinal adjustment of the latter, and also for raising the worm into engagement with the worm wheel, after the ring chuck, 10, and the tripping dog, 19, have been returned to: starting position, which position is accurately determined by a stop, 22, formed on the worm wheel, which abuts against an adjusting screw, 22 The adjusting screw is supported in the hori Zontal position shown in F ig. 1, by the worm casing, 2 through which it projects, adjacent to the worm wheel, 13. The worm casing, 2, in which the trip lever is journaled, is preferably formed integral with the head stock, 2, for the purpose of insuring rigidity and accuracy in the measured length of the groove of the fuse timing ring. A stop, 13, prevents excessive downward movement of the worm and bracket, when the bracket arm, 13 is released at its upper end.

A radially disposed puppet, 23, is fitted in the ring chuck, 10, the lower end of said puppet being adapted to enter a radially extending locating hole, formed in the fuse timing ring, so as to prevent the rotation of the latter upon the chuck centering pin, 24, when the cutter, 4, is removing material to form the groove in the ring. A coiled spring, 25, mounted upon a pin, 25*, secured to the knurled head of the puppet, forces the lower end of the puppet-securely into the locating hole. The puppet bracket, 26, is recessed into the chuck, and secured thereto by a screw, 26. The fuse timing ring, 9, is clamped tightly against the face of the chuck by a shell cam, 27, which is provided with a handle, 27 for the purpose of manually imparting to it a rotative movement on the chuck, which it embraces peripherally, as shown. This movement causes the cam slots 27", to engage the oppositely projecting ends of the transversely disposed pin, 28, and force the cam tightly against a fuse timing ring previously positioned in the chuck. A peripheral gap, 2",, is cut in the shell cam, in order to clear the puppet bracket, 2 1V hen releasing the fuse timing ring, the cam is turned to clear the pin,

v28, and is placed, for convenient support, on

a stand, 29, to permit ready removal and insertion of fuse timing rings.

In adjusting the machine for operation on a fuse timing ring, the adjusting screws, 3, are set against the downwardly projecting lug, 2, so as to cause the lateral distance between the axes of the cutter and the ring chuck spindle to be precisely equal to the mean radius of the groove, 9*, to be formed in the ring, after which the head stock is securely clamped to the bed by the bolts, 2. The sleeve nuts, 11, are so set on the sliding member, 7, that when they abut against the end of the bearing, 1*, the cutter, 4, will be at a distance from the chuck, 10, to give precisely the proper depth to the powder groove, 9 The fuse timing ring is placed on the centering chuck pin, 24;, and the puppet, 23, is inserted in the locating hole. After clamping the ring by the shell cam, 27, the ring chuck and worm wheel are turned to bring the groove starting hole into axial alinement with the cutter. The cutter is then moved toward the chuck, by the handle, 8, and crank, 8 until the cutter enters the groove starting hole to its proper depth, as determined by the setting of the sleeve nuts, 11, for which position the end of the screw, 22*, is set snugly against the worm wheel stop, 22. The cut ter and feediworm, 13 are started, after which the worm is lifted by the handle, 21, into engagement with the worm wheel, 13. The worm wheel and the ring chuck will rotate slowly while the cutter is forming the groove, until the predetermined setting of the dog, 19, releases the worm and stops the feed, by the engagement of the dog, 19, with the pin, 17. The dog, 19, is set and fastened to the -worm wheel by the sleeve nut, 19 After the groove has been cut, the cutter, is moved toward the right, the shell. cam is released, and the grooved fuse timing ring is removed, the parts being then in position for the insertion of the next ring to be operated on.

Worm Wheel; means I claim as my invention and desire to secure by Letters Patent:

1. In a milling and routing machine, the combination of a frame or bed; a milling cutter rotatable in a bearing thereon; a headstock fitted to traverse on the bed, transversely to the axis of the cutter; a chuck spindle journaled in said headstock; a Worm Wheel fixed on the chuck spindle;

a bearing bracket pivotally supported on the headstock: a feed Worm journaled in said bearing bracket and adapted to engage the Worm Wheel; means for rotating said feed worm; manually operable means for moving the bearing bracket about its pivotal axis to engage the feed Worm With the for retaining said bearing bracket in position to maintain operative engagement of the feed Worm and Worm Wheel; and means automatically operable by the rotation of the chuck spindle, for releasing said retaining means at a predetermined point in the rotation of the chuck spindle.

2. In a milling and routing machine, the combination of a frame or bed; a milling Copies of this patent may be obtained for five cents each, by addressing the cutter rotatable in a bearing thereon; a headstock fitted to traverse on transversely to the axis of the cutter; a chuck spindle journaled in said headstock; a Worm Wheel fixed on the chuck spindle; a bearing bracket pivotally supported on the headstock; a feed Worm journaled in said bearing bracket and adapted to engage the Worm Wheel; means for rotating said feed Worm; manually operable means for moving the bearing bracket about its pivotal axis to engagethe feed Worm With the WOIIII Wheel; a bracket arm fixed to the bearing bracket; a trip lever pivoted to the the bed.,'

casing of the Worm Wheel and maintaining operative engagement of the feed Worm and Wheel by bearing on the bracket arm; and a tripping dog fixed to the Worm Wheel and adapted to disengage the trip lever and bracket arm at a predetermined point in the rotation of the chuck spindle.

FRANCIS DAVIES.

Witnesses:

FREDERICK RAWLINGs, HENDREH G. NELsoN.

Commissioner of Patents,

Washington, .D. C

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