US1518154A - Milling machine - Google Patents

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J. J. LA DUCER MILLING MACHINE Filed Nov. 28,v 1921 2 Sheets-Sheet l nee.. 9, 1924. I 1,518,154

J. J. LA DUCR MILLING MACHINE Filed Nov. 28, 15921 2 Sheets-Sheet 2 A Hartford, in the county of Patented Dec. 9, 1924.

UNITED -s'rA'ri-:s

1,518,154 PATENT GFFl-CE.

JERRY J. LA DUCER, F HARTFORD, CONNECTICUT, ASSIGNOR T0 PRATT & WHITNEY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

MILLING MACHINE.

Application med November 28, 1921. Serial No. 518,330.

To all whom z't may concern.'

Be itknewn that I, JERRY J. LA Ducnn, a citizen of the United States residing at Iartford and State of Connecticut, have invented certain new and, useful Improvements in Milling Machines, of which the following is a speci- .fication This invention relates` to metal working machines and particularly to milling inachines of the column and knee type. The

primary object of the invention is to provide an improved milling machine of'this type combining an improved column construction providing a reservoir, mechanism in combination therewith particularly adapted to supply a coolant to the tool, and improved means for returning such coolant from the table to the reservoir within the column.

Another object of the invention is to provide an im roved column construction comprising a ollow column provided with a vertical reinforcing and dividing web therein, such web dividing the column into an inner reservoir portion and an open outer portion adapted to receive a spindle driving means therein.

'Another object of the invention is toprovide an improved work support construction comprising a vertically adjustable knee, a saddle horizontally adjustable thereon and a work table movably mounted on the saddle, such three elements each bein provided with a coolant' receiving troug and improved means cooperating with the troughs for directing the coolant from the table to the reservoir in the base of the column.

With these and other objects in view, my invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawings. In such drawin s annexed hereto and forming a part of this specification, I have shown certain embodiments of my invention in a milling machine, but it will be understood that the invention can be otherwise embodied and that the drawings are not to be construed as defining or limiting-the scope of the invention, the claims appended to this specification being relied upon for that purpose.

Referring to the figures of the drawings: Figure l is a side elevation of a milling machine, partially in section, illustrating certain features of my invention.

Fig. 6 is a detail view taken on line 6-6 of Fig. 5.

Referring more specifically to the drawings by reference characters, 1 indicates the base, 2 the column, and 3 the spindle supporting over-arm of a millin machine illustrative of my invention. ork supporting means, comprising a knee 4 provided with a saddle 5 and a table 6 thereon, is vertically adjustable on the column by means of a screw 7. A hand wheel 8 is provided for operating the screw 7 and the saddle may be adjusted horizontally on the knee b means of a hand wheel 9 on a screw 9a. he table is provided with a rack 10 'adapted to be engaged by a pinion through which the table may be operated either by hand or power in the usual and well known manner. A power table feeding shaft l1 is provided in the knee and is adapted to be driven through a-telesco ic shaft connection 12 from the spindle riving mechanism now to be described.

A tool spindle 18 is rotatably mounted in the column and has concentrically mounted thereover a driving sleeve 14: supported in bearings independently of the spindle. The sleeve is adapted to drive the spindle through a gear 15 on the sleevemeshing with a gear 16 on a parallel shaft 17 having a second gear 18 thereon meshing with a gear 19 on the spindle.' The telescopic connection 12 to the tool feeding mechanism is driven from the shaft 17 through gears 20 and 21, shaft 22 and change gears 23 to a stub shaft 24 operatively connected to the telescopic shaft. The spindle driving gears 18 and 19 and the change gears 23 are interchangeable in a manner to vary either the spindle speed or the table feeding speed independently of the other. The spindle driving sleeve 14 is illustrated as being driven from a motor 25 mounted on the base of the column, a belt 26 operatively connecting a pulley 27 on the sleeve with a pulley 28 on the motor shaft. This mechanism is all more specifically shown and described in my copending application Serial No. 518,329 filed on even date herewith.

As will be noted, the column 2 is hollow and is provided with a vertically extending web 29 therein, such web dividing the column into an inner reservoir portion 30 and a rear open outer portion 31. The reservoir portion is preferably extended outwardly at the front ofthe machine at 32 to a position beneath the knee, the purpose of which will be hereinafterv described. The rear outer portion 31, as illustrated in Fig. 1, provides a space within the outlines of the column for housing the belt 26, or other spindle driving means. It should furthermore be noted that the web 29 operates as a reinforcement tFig. 4) to the column and provides a bearing support for the shaft 22.

The table 6 of the work-support is provided with a surrounding trough 33 preferably integral therewith. The saddle 5 is provided with a trough 34, extending along the front edge thereofI and the knee 4 is likewise provided with a similar trough 35 extending along one side thereof. The table trough 33 is provided with an opening 36 therein which opening in all positions of the table is over some portion of the trough 34 in the saddle. A screen 36a is mounted in the opening 36 to prevent chips from passing through the opening The saddle trough 34 is provided with an opening 37 therein which opening in all positions of the saddle is over some portion of the knee trough 35. The knee 4 is provided in its rear lportion with a cored opening 38 in communication with the trough 35 therein and extending downwardly within the knee to a position directly over the before-mentioned forwardly extended portion 32 of the reservoir 30. Means, preferably comprising telescopic pipes or casings 39 and 40 provides a communication between the cored opening 38 and the reservoir. As illustrated in Fig. l, the pipe 39 is screwed into the knee at the lower end of the opening 38. Such pipe is telescoped within the casing 40 which extends freely into the reservoir. These two elements are secured together by a cap 4()a surrounding the pipe and threadedly engaging the casing over a bushing 39a threaded to the lower end of the pipe. The casing 40 is cut away at 40b to permit free flow of liquid therefrom when the casing rests on the bottom of the reservoir as illustrated in Fig. l. The arrangement of the mechanism is such that a coolant iiowing onto the work table will in all positions of the work supporting mechanism be conducted through the several troughs and openings to the reservoir. With the knee in its lowered position, the pipe 39 'telescopes Within lthe casing 40 and the freedom of the casin 40 within the reservoir opening permits t ecasing to be lifted upwardly by the pipe 39` when the knee is elevated to a position higher than that shown in Fig. 1.

A pump 41 is provided for supplying the tool with a coolant liquid from the reservoir 30. I preferably mount this pump on a bracket 42 at the top of the column, bolts '43 securing the pump to the bracket and bolts 44 securing bracket to the column. The pump is driven from a. sprocket 45 on the shaft 17 through a flexible chain belt 46. Screws 47 are provided in the bracket in connection with the bolts 44 for vertically adjusting the bracket and pump to place the proper driving tension on the chain 46.

An intake pipe 48l extends from the reservoir upwardly into one side of the pum a priming pipe 49 branching therefrom ad)- jacent the pump and extending upwardly through the over-arm 3; An outlet or discharge pipe 50 extends outwardly and downwardly from the other side of the pump. This pipe branches to rovide a discharging pipe 51 to the tool an an over-flow pipe 52 provided with a relief valve 53 thereon at its lower end. By removing the over-arm 3, the pump and pipe connections 48, 49, 50, 52 and 53 may be assembled in or removed from the column as a unit. In operation, the pump may first be primed by pouring a coolant liquid into the priming pipe 49. The coolant is drawn upwardly into the pump from the reservoir through the pipe 48 and is normally discharged from the pum through the pipes 50 and 51 to the tool. hould the pipe 51 become closed or the pressure therein exceed a certain limit, the valve 53 will be opened and the liquid permitted to flow through the branch pipe 52 back into the reservoir.

The invention illustrated and described herein provides a milling machine combining various improvements, particularly in the tool lubricating and cooling system thereof. The column is rigidly constructed and so arranged as to provide both a reservoir most conveniently located therein and a space adjacent` thereto for housing the spindle driving means, as the belt 26 illus- Y trates. A pump and mechanism cooperating therewith, including driving means therefor, are conveniently arranged within the column for supplying the proper amount of coolant from the reservoir to the tool over the table. The work supportin mechanism comprising the knee, saddle and table is so arranged that such coolant flowing onto the work table will, in all positions of the work supporting mechanism, be conducted through the several troughs and openings to the-reservoir. It shouldbe understood that the accompanying drawings are illustrative only of these and other advantages and im-` provements comprising the invention and that modifications thereof within the scope `the saddle trough having al1-opening therefrom positioned over the first trough in all positions of saddle adjustment, a work table lineally movable on the saddle and provided with a trough therein, the table trough having an opening therefrom positioned over the saddle trough in all positions of tab-le movement, and a reservoir into which the first named trough empties, the arrangement being such that al coolant flowing on the work table will in all positions of the work supporting mechanism be conducted through the several troughs and openings to the reservoir. v

2. In a milling machine, the combination of a column, a knee vertically adjustable thereon and provided with a trough therein, a saddle adjustable on the knee and provided with a trough therein, the saddle trough having an opening therefrom positioned over the first trough in all positions of saddle adjustment, a work table lineally movable on the saddle and provided with a trough therein, the table trough having an opening therefrom positioned over the saddle trough in all positions of table movement, and a reservoir into which the first named trough empties, the arrangement being such that a coolant flowing on the work table will in all positions of the work supporting mechanism be conducted through the several troughs and openings to the reservoir.

3. In a milling machine, the combination of a column, a knee vertically adjustable thereon and provided with a trough therein, a saddle adjustable on the knee and provided With a trough therein, the saddle trough having an opening therefrom positioned over the first trough in all positions of saddle adjustment, a work table lineally.

movable on the saddle and provided with a trough therein, the table trough having an opening therefrom positioned over the saddle trough in all positions of table movement, a reservoir formed in the base of the column, and means providing a duct between the knee trough and reservoir, the arrangement being such that a coolant flowing on the Work table will in all positions of the work supporting mechanism be conducted through the several troughs and openings to the reservoir.

4. In a milling machine, the combination of a column, a knee vertically adjustable thereon and rovided with a trough therein,

a saddle adjustable on the knee and provided with a trough therein, the saddleI -trough having an opening therefrom positioned over the first trough in all positions of saddle adjustment, a work table lineally movable on the saddle an'd provided with a trough therein, the table trough having an opening therefrom positioned over the saddle trough in all positions of table movement, a reservoir, and telescopic means between the knee and reservoir providing a duct therebetween in all positions of ad- 'ustment of the knee, the arrangement being such that a coolant iiowingon the work I table will in all positions of the work supporting mechanism be conducted through the several troughs and openings to the reservoir. i

5. In a milling machine, the combination of a column, a knee vertically adjustable thereon and provided with a trough and a cored opening therein extending downwardly from Ithe trough, a saddle adjustable on the knee and provided with a trough therein, the saddle trough having an opening therefrom positioned over the first trough in all positions of saddle adjustmentfa work table lineally movable on the saddle and provided with a trough therein, the table having an opening therefrom positioned over the saddle trough in all positions of table movement, a reservoir, and telescopic means between the lower end oi the cored opening and the reservoir and providing a duct therebetween in all positions of adjustment of the knee, the. arrangement being such that a coolant flowing on the work table will in all positions of the work sup orting mechanism be conducted through t e several troughs and openings to the reservoir.

6. In a milling machine, the combination of a column, a knee vertically adjustable thereon and provided with a trough and a cored opening therein extending downwardly from the trough, a saddle adjustable on the knee and provided with a trough therein, the saddle trough having an opening therefrom positioned over the first trough in all positions of saddle adjustment, a work table lineally movable on the saddle and provided with a trough therein, the table trough having an opening therefrom positioned over the saddle trough in all positions of table movement, a reservoir. and means secured to the knee at the lower end of the opening and extending downwardly into the reservoir to provide a duct therebetween in all positions of'adjustment of the knee, the arrangement being such that a coolant flowing on the work table will in all positions of. the work supporting mechanism be conducted through the several troughs and o enings to the reservoir.

7 In a milling machine` the combination of a colum, a knee vertically adjustable thereon, a reservoir in the column, and telescopie means secured to the knee and extending loosely into the reservoir, the said means providing a' duct for conducting a coolant from the knee to thereservoir.

8. In a milling machine, the combination of a column, a knee vertically adjustable thereon, a reservoir in the column extending outwardly to a position beneath the knee,.and means secured to the knee and extending downwardly into the extended portion of the reservoir beneath the knee, the said means providing a duct for conducting a coolant from the knee to the reservoir.

9. In a milling machine, the combination of a base, a work support thereon, a saddle slidable on the work support, the work support being provided with a trough therein 1 adapted to receive a coolant from the saddle, a reservoir in the base, and means in# cluding a cored opening extending downv wardly from the trough and through the work support for conducting a coolant to the reservoir.

10. In a milling machine, the combination of a column, a reservoir` a knee vertically adjustable on the column, and a work support mounted on the knee, the knee being provided with a cored opening extending downwardly therethrough and providing in part a duct for directing a coolant from the work support to the reservoir.

11. In a milling machine., the combination of a column, a reservoir in the base thereof, a knee vertically adjustable thereon and provided with a coolant receiving trough therein and a cored opening extending downward therein from the trough, and means providing a duct between the opening and reservoir.

12. In a milling machine, the combination of a column, a knee vertically adjustable thereon, a reservoir in the base of the column, the knee being provided with a cored opening extending downward therethrough,

l and telescopic means secured to the knee at the lower end of the opening and extending into the reservoir, the said 4opening and means providing a duct for conducting a coolant from the knee to the reservoir.

13. In a milling machine, the combination of a hollow column, a tool spindle rotatable therein, a work support vertically adjustable thereon beneath the spindle, and an integral web extending vertically therein and dividing the column into an inner reservoir portion and an open outer portion, the said outer portion providing a space for a spin dle driving means extending from the base of the column to the spindle.

14. In a. milling machine, the combination A of a hollow column, a tool spindle rotatable therein, a work support vertically adjustable thereon beneath the spindle, an integral web extending vertically therein and dividing the column into an inner reservoir portion and an open outer portion, a motor mounted on the base of the column and having a belt pulley extending into the said outer portion, and a belt from the said pulley extending upwardly in the said outer portion and operatively connected to the spindle to drive the same.

15. In a millng machine, the combination of a hollow column, a tool spindle rotatable therein, a work su port vertically adjustable thereon beneath t e spindle, a web extending vertically therein and dividing the column into an inner reservoir ortion and an open outer portion, the sai reservoir extending outwardly of the column to a position beneath the work support, the base of the column at the rear thereof being adapted to have a motor mounted thereon, and thesaid outer portion providin a s )ace for a belt adapted to extend upwar ly rom a pulley on the motor shaft to a pulley connected to the s indle.

16. In a mil ing machine, the combination ot' a column, a work support, a hollow overarm mounted on the column, a pump mounted on the colmnn within the arm, a reservoir, piping leading from the pump to the reservoir and work support, and means t'or driving the pump.

17. In a milling machine, the combination ot a column, a work support, a hollow over.- arm mounted on the column, a pump mounted on a bracket on the column within the arm, a priming pipe leading from the pum through the arm, a reservoir, piping lea ing from the pump to the reservoir and work support, and means for driving the pump.

18. In a milling machine, the combination of a column, a work support, a hollow overarm mounted on the column, a pump mounted on a bracket on the column within the arm, a reservoir, piping leading from the pump to the reservoir and work support, belt means for driving the pump, and means for adjusting the bracket to tension the belt.

19. In a millin machine, the combination of a column, a nee vertically adjustable thereon, a work table movably mounted on the knee, a hollow over-arm mounted on the column, a pump mounted on the column within the arm,l a reservoir in the base of the column, piping leading from the pump to the reservoir and work support, means for directing a coolant from the table to the reservoir, and means for driving the pump.

20. In a milling machine, the comb'nation of a column, a pump mounted thereon, a reservoir within the base of the column, an intake pipe leading from the pum i into the reservolr, and a discharge pipe lea ing from the pump downwardly toward the reservoir, the pump and the said pipes being removable from the column as a unit.

21. In a milling machine, the combination of a column, a work support, a hollow overarm mounted on the column, a pump mounted on the column within the arm, a'reservoir within the base of the column, an intake pipe leading from the pump into the reservoir, a discharge pipe leading from the pump downwardly toward the reservoir,

and at` pipe branching from the discharge pipe and extending over the work support, 10 the pump and the first two named pipes being removable fromr the column as a unit.

In testimony whereof, I hereto aix my signature.

JERRY J. LA DUCER.

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