US1265483A - Facing-tool. - Google Patents

Description

E. S. MUMMERT & J. O. DIXON.

FACING TOOL, APPLICATION FILED MAY 4. I917.

Patented May 7,1918.

3 SHEETS-SHEET 1 Swuamtozs E. S. MUMMERT & J. 0. DIXON.

FACING TOOL.

APPLICATION FILED MAY 4, 19!?- 1,265,43. Patented May 7,1918.

3 SHEETS-SHEET 2.

E. S. MUMMERT & J. 0. DIXON.

v FACING TOOL.

APPLICATION FILED MAY 4, I917.

Patented May 7,1918.

3 SHEETSSHEET 3.

iinrr as rarnnr orrron ERVIN S. MUMMERT AND JOSEPH. O. DIXON, OF HANOVER, PENNSYLVANIA.

FACING-TOOL.

Specification of Letters Patent. 7

Patented May 7, 121-8.

Application filed May 4:, 1917. Serial No. 166,374.

To all whom it may concern:

Be it known that we, ERYIN S. MUMMERT and J osnrrr O. DIXON, both citizens of the United States, and residing at Hanover, county of York, and State of Pennsylvania, have invented certain new and useful Improvements in Facing-Tools, of which the following is a specification.

Our invention relates to facing tools of the type disclosed in Letters Patent No. 1,191,813, granted to us July 18, 1916, and has for its objects to provide certain improvements in the construction of the head of the tool therein disclosed, as follows First, to provide an improved two-way feed for the tool holder, whereby it may be fed either inwardly toward the center of the head, or outwardly toward the periphery thereof, at will.

Secondly, to provide an improved holder for the tool.

Thirdly, to provide an improved construction of feed plungers therefor, and

Fourthly, to provide an improved pilot and drill holder.

These objects we accomplish in the manner and by the means hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a front View of our improved device with the front plate or disk removed.

Fig. 2 is a side elevation of the same shown partly broken away.

Fig. 8 is an enlarged detail side elevation of the bracket carrying the gearing for effooting the two-way feed of the tool.

Fig. 41- is an edge view of the same.

Fig. 5 is a detail elevation of the guard plate, which cooperates with the gear carrying bracket.

Fig. 6 is a detail view of the toothed feed wheel showing its relation to the gearing for driving it in opposite directions as described.

Fig. 7 is a detail sectional view taken through said toothed feed wheel and its bearing.

Fig. 8 is a detail sectional view of a springpressed brake shoe for the toothed feed wheel.

Fig. 9 is a detail sectional view of the stop pin for retaining the gearing intermediate the drive and feed wheels in any one of its three adjusted positions.

Fig. 10 is a detail side elevation of the tool holder.

Fig. 11 is a detail perspective view of a tool holding sleeve.

Fig. 12 is a detail perspective view of a gib interposed between the tool holder and its slide-way for taking up wear, and also for clamping the same against movement when desired.

Fig. .13 is a detail sectional view of one of the feed plungers.

' Fig. 141 is a face view of the feed plunger carrying disk.

Fig. 15 is a central vertical longitudinal sectional. view of the tool head, showing one of our improved pilots positioned therein.

Fig. 16 is an end view of the shank or spindle of the lathe.

Fig. 17 is a side elevation of one of our improved pilot holders.

Fig. 18 is an end view of the same.

Fig. 19 is a side elevation of our improved tool holder having aboring tool inserted therein.

Fig. 20 is an end view of the same.

Fig. 21 is a side elevation of our improved holder for a center point pilot, the latter being shown in position therein.

Fig. 22 is an end view of the same.

Similar numerals of reference denote corresponding parts in the several views.

Our improved device comprises a head 1 provided with a central bore 2, adapted to be fitted upon a shank or spindle 8, which is to be inserted into a lathe, boring mill or like device, said head 1 being fastened to said shank or spindle 3 in any suitable manner, preferably being splined thereto as at a in Fig. 15. The head 1 is provided at its front with a diametrically extending groove or guideway 5, within which a tool holder 6 is mounted slidably, said holder being confined within the guideway 5 by means of a front plate or disk 7 secured to the head 1 by screws 8. The holder 6 is provided with a transverse circular bore 9, adapted to receive the tool holding sleeve 10, shown in detail in Fig. 11, said sleeve being provided with a squared longitudinal slot 11 into which the tool 12 fits, said tool holding sleeve also being formed on its outer face with rack teeth 13 with which engages a rack pinion 141 formed on a shaft 15, the latter projecting from the end of the tool holder 6, as best seen in Fig. 1. Also tapped into the tool holder 6 are two screws 16, adapted to engage the tool 12 clamping it firmly to the tool holder sleeve 10 in any adjusted position. Mounted ina recess 17 in one face of the tool holder 6 is a gib 18, tapered toward its inner end and provided with a slotted head 19 at its outer end, with which a screw 20 engages, whereby said gib may be adjusted in or out, it being understood that the slot receiving the same is tapered similarly to said gib, as shown in dotted lines in Fig. 1. The tool holder 6 is adapted to be moved in a radial direction by means of a feed screw 21 having a square thread and loosely seated within a trouglnshaped smooth transverse groove 22 of the head 1, said screw 21 protruding laterally into a threaded segmental recess 23 of the holder 6. The screw 21 is provided at its inner end with a gear 24, carried upon a smaller extension 25 of said screw, said extension projecting into a suitable bearing formed in a gear carrying bracket 26, which is bolted to the head 1, as best seen in Fig. 1 Also mounted in suitable hearings in the bracket 26 is a toothed feed wheel 27 on the shaft 28 of which to one side of said feed wheel is a gear 29 smaller than the gear 24, said gear 29 being intended to rotate with the feed wheel 27. Also mounted in said bracket 26 and fixed to the shaft 28 is a swinging bracket 30 carrying two similar gears 31 and 32, adapted alternately to be brought into mesh, through the movement of said bracket 30, with the gear 24, it being observed that the gear 32 remains constantly in mesh with the gears 29 and 31. The position of this bracket 30 is controlled by an arm 33, fixed to the shaft 28, said arm 33 by its movement thus shifting the position of the shaft 28 and bracket 30, and said arm being retained in any one of the three adjusted positions by the engagement of a pin 34 in its free end with any one of three apertures 35 formed in a projection 36 on the bracket 26, said pin 34 being normally pressed inward by spring 37, and being capable of being withdrawn through a finger piece 38 fixed thereto. In order that the feed wheel 27 may not move too freely, we prefer to employ a brake shoe 39 disposed in a pocket in the bracket and pressed by a spring 40 into frictional contact with one face of the feed wheel 27. The teeth of the feed wheel 27 are adapted to be engaged by a number of plungers 41 that are mounted yieldingly in hollow plugs 42, fixed in a ring 43, said plungers being normally pressed inwardly by springs 44, and being capable of retraction through finger pieces 45 fixed thereto. The ring 43 is mounted loosely on the hub 46 of the head 1 and is held in position by a collar 47 firmly driven upon the outer end of said hub. The finger piece 45 of each of the plungers 41 is provided with a pin 48. adapted normally to pass into an aperture in its plug 42 so as to permit the maximum inward movement of the plunger 41, but which, when the plunger 41 is withdrawn by pulling upon the finger piece 45, and when said finger piece is turned, will abut against the outer face of its plug 42, thereby retaining said plunger 41 in retracted or inoperative position with respect to the teeth of the feed wheel 27. Any number of these plungers 41 may be employed, and all or any number of the same may be manipulated to remain in or out of operative relation with respect to said feed wheel 27, dependent upon the rapidity with which the tool is to be fed. The ring 43 is provided at its periphery with a number of radially extending apertures 49, into which a suitable rod or other implement (not shown), may be in-- serted for maintaining said ring at a stand-- still while the head 1 rotates.

In order properly to support the feed wheel 27 and its gear wheels in the bracket 26, we provide a guard plate 50 bolted to said bracket 26, and which provides a bearing for the shaft 28 of the feed wheel 27, as best seen in Figs. 1 and 5.

As thus far described, it will be seen that upon the rotation of the head 1 in the proper direction, the teeth of the feed wheel 27 will engage intermittently with the plungers 41 in the ring 43, as said ring does not participate in the rotation of said head. In this way with the bracket 30 in the position shown in Fig. 6, so that the gear wheel 32 is in mesh with gears 24 and 29, said feed wheel 27 and screw 21 will be rotated intermittently, thereby gradually to advance the holder 6 and the tool 12 carried thereby. After the latter has performed its work, it may be returned to its original position by simply shifting the bracket 30 so that the gear wheel 32 is carried out of mesh with the gear wheel 24 and the gear wheel 31 brought into mesh therewith, the result being that the rotation of the screw 21 will be reversed, and the tool holder 6 will be re turned to its initial innermost position. It will be understood that this shift of the bracket 30 is accomplished through arm 33, and by withdrawing the pin 34 thereof from the hole 35 in which it is engaged and moving it to the hole 35 at the other side. But when it is desired to stop the feed of the screw 21 and tool holder 6, the arm 33 is shifted so that its pin 34 engages the intermediate hole 35, in which position both of the gear wheels 31 and 33 will be out of mesh with the gear wheel 24.

4 The outer end of the lathe shank or spindle 3 is apertured at 51 and is provided with an internal bayonet slot 52 adapted to receive a pin 53 near the inner end of the shank 54, which projects beyond the outer face of the plate 7 and is adapted removably to receive thereon a thimble or pilot 55, that is capable of being received snugly within a correspondingly central hole within the surface to be planed. By keeping in stock a number of thimbles of different outer diameters, the head 1 readily may be adapted to work pieces having central holes of varying diameter. In case the surface to be planed has no such hole, a shaft 56, shown in Figs. 21 and 22, is provided, the same carrying a center point pilot 57. And it will be observed that the shafts 54 and 56 are cutaway on one side at 58 to leave room for an extreme inner movement to the tool head (3. When it is desired to accomplish a center bore, a shaft 59, shown in Figs. 19 and 20, may be inserted into the spindle 3, said shaft carrying removably at its outer end a cutting tool 60, which is retained by a set screw 61.

It will be seen that our improved facing tool affords an effective means for facing the bosses of stationary work pieces and of performing similar work. In operation, the facing tool of the rotating head 1 is fed by gripping the ring 4:3 with the hand, or by inserting a pin into one of its radial peripheral sockets l9 in such manner that the latter will bear against a part of the machine frame. In this way the screw 21 is operated gradually to feed the tool radially across the face to be planed.

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

1. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said tool holder either outwardly or inwardly, means carried by said head and movable in one direction for operating said feeding means, a pivoted bracket intermediate said operating and feeding means, gears carried by said bracket and meshing with gears on said operating and feeding means and shiftable by the movement of said bracket on its pivot to transmit motion from said operating means to said feeding means in either direction, and automatically locking means for retaining said bracket in either transmitting position or in an intermediate position with said gears inactive.

2. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said tool holder either outwardly or inwardly, means carried said head and movable in one direction for operating said feeding means, a pivoted bracket intermediate said operating and feeding means, gears carried by said bracket and meshing with gears on said operating and feeding means and shiftable by the movement of said bracket on its pivot to transmit motion from said operating means to said feeding means in either direction, an arm controlling the position of said bracket, and a spring-pressed pin carried by said arm and adapted to engage one of a series of apertures in the head forretaining said gears in either transmitting position or in an intermediate inactive position.

3. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said tool holder either outwardly or inwardly, a feed wheel in said head adapted to be actuated step by step in one direction, a bracket pivoted upon the axis of said feed wheel, a gear fixed to and movable with said feed wheel, two gears carried by said bracket constantly in mesh with each other, and one constantly in mesh with said feed wheel gear, and a gear connected with said feeding means with which either of said bracket gears is adapted to be brought into mesh by the movement of said bracket, whereby the motion of said feed wheel may be transmitted to said feeding means gear in either direction as desired.

4. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, a feed screw in said head engaging said tool holder for moving the same either outwardly or inwardly, a feed wheel in said head adapted to be actuated step by step in one direction, a bracket pivoted upon the axis of said feed wheel, a gear fixed to and movable with said .gear wheel,-two gears carried by said bracket constantly in mesh with each other and one constantly in mesh with said feed wheel gear, a gear connected with said feed screw with which either of said bracket gears is adapted to be brought into mesh by the movement of said bracket, whereby the inotion of said feed wheel may be transmitted to said feed screw gear in either direction as desired, an arm controlling the position of said bracket, and a spring-pressed pin carried by said arm and adapted to engage one of a series of apertures in the head for retaining said gears in either transmitting position or in an intermediate inactive position.

5. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, a feed wheel in said head adapted to be actuated by the movement of the head, means between said feed wheel and said tool holder for transmitting the motion of the former to the latter, and a spring-pressed brake shoe adapted to contact with one face of said feed wheel to check its movement.

6. A facing tool, comprising a rotary head, a tool holder mounted therein, a too] holding sleeve adapted to receive a tool, and means for adjusting said sleeve and its tool longitudinally with respect to said holder.

7 A facing tool, comprising a rotary head, a tool holder mounted therein, a tool holding sleeve adapted to receive a tool,

means for adjusting said sleeve and its too] longitudinally with respect to said holder, and means for clamping said sleeve when so adjusted.

8. A facing tool, comprising a rotary head, a tool holder mounted therein, a tool holding sleeve in said holder slotted in one side to receive a tool and having rack teeth on its outer face, and a worm in said holder engaging said rack teeth to adjust said sleeve and its tool in said holder.

9. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said tool holder, a tool holding sleeve in said holder slotted in one side to receive a tool, and means for adjusting said sleeve and its tool with respect to said holder.

10. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said tool holder, a tool holding sleeve in said holder slotted in one side to receive a tool and having rack teeth in its outer face, and a pinion in said holder engaging said rack teeth to adjust said sleeve and its tool in said holder.

11. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said tool holder, a tool holding sleeve in said holder slotted in one side to receive a tool and having rack teeth in its outer face, a pinion in said holder engaging said rack teeth to adjust said sleeve and its tool in said holder, and means for clamping said sleeve when so adjusted.

12. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said too] holder, a toothed feed wheel in said head for operating said tool holder feeding means step by step, spring-pressed plungers for operating said feed wheel step by step, and means associated with each of said plungers for maintaining it out of operative position when desired.

13. A facing tool, comprising a rotary head, a tool holder mounted and movable radially therein, means for feeding said too] holder, a toothed feed wheel in said head for'operating said tool holder feeding means step by step, and a plurality of means for operating said toothed feed wheel step by step each comprising a plug mounted in a portion of the device adapted to be maintained against rotation, a spring-pressed plunger in said plug, a finger piece for Withdrawing said plunger against said spring tension, and a pin on said finger piece adapted to enter an aperture in said plug to permit said plunger to project into operative position, or when withdrawn and turned to contact with the outer face of said plug to maintain said plunger with drawn in inoperative position.

14. A facing tool, comprising a rotary head, a spindle carrying said head. an aperture in its forward end to receive a pilot or center bore shank, said spindle being provided with a bayonet joint adapted to Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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