US873787A - Boring and turning mill. - Google Patents

Description

No.873,787. PATBNTED DEG.17,190'7.

- J. RIDDELL.

BORING AND TURNING MILL. APPLIOAI 3ION FILED JUNE 27, 1203.

6 SHEETS-SHEET 1.

ginessesz Inventor:

No. 873,787.. PATENTED DEC. 17, 1907.

J.-RI DDBLL.

BORING AND TURNING MILL.

APPLICATION FILED JUNE 27, 1903- 6 SHEETS-SHEET 2.

tr essesz a Inventor: fi? John RiddeH,

PATENTED DEC. 17, 1907. J. RIDDELL. BORING AND TURNING MILL.

APPLICATION IILED JUNE 27, 1903.

6 SHEETS-SHEET 3.

Inventor by M Jo n Rlddel I 'fltty PATENTED DEC. 17, 1907.

J. RIDDELL.

BORING AND TURNING MILL.

APPLICATION FILED JUNE 27, 1903.

6 SHEETS-SHEET 4.

Inventor. John RiddeH. y

6 SHEETS-SHEET 5.

- PATENTED DEC. 17, 1907.

J. RIDDBLL. BORING AND TURNING MILL.

APPLICATION FILED JUNE 27, 1903.

V/lu 1 I I 1 I 1 I I 1 I 1 1 l -1 inventor .JohnRiddelh v, PATENTEDDEG.17,1907. 'JLRIDDELL. IBORINGANDTURNINGMAILL,

APPLICATION FILED JUNE 27, 1903.

6 SHEETS-SHBET 6 %7W.i triesse Inventor a, John'R iddellQ M%;

- ing and turning mills.

' expenditure of effort on the part of the oper- UNITED STATES JOHN RIDDELL, or

PATENT carton.

SGHENEOTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

BORING. AND TURNING MIL L;

Patented Dec. 17, 1907.

To all whom it may concern:

Be it known that 1, JOHN RIDnELL, a citizen of the 'United States, residing at Schenectadv, in the county of Schenectady, State -Mills, of which thefollowing is a specification.

The present invention relates to powerdriven machine tools, and more particularly to that class of machine tools known as bor- The object of my invention is to provide a machine-of this class which shall be adapted to receive and operate upon muchlarger pieces of metal than the machines heretofore in use, and which will not require a greater ator to manipulate.

A further object of my invention is to provide a boring mill on which a greater number-and'variety of operations may be performed either separately or simultaneously,

' so that the number of changes of the part operated upon from one kind of machine .to another is greatly reduced, and in a large number of cases the entire work may be performed without removal therefrom.

The device comprises a table having a revoluble peripherally-driven center section, and 'a stationary outer section upon which stand massive upright housings-that are designed to be moved radially thereover to? provide clearance between them, according to the diameter of the part operated upon,

and these housings are each provided with an inwardly projecting cross arm, upon which tool-supporting and feeding means are carried, and the inner end of which is rigidly held by an inwardly-projecting bracket secured to the stationary part of the table.

The central spindle of the table is provided with an independentlyactuated tool bar. which is adapted to be rotated to bore outand face off the central part of the piece operated upon, such as the hub of a fly-wheel, and also adapted to be reciprocated-vertically to cut key-slots and the like. The device also comprises numerous structural details whereby the tendency of the parts to vibrate is overcome, and the adjustment of the various tool-holding means to different positions is accomplished by owermeans.

The invention will be rea ily'understood upon reference to the following description and the accompanying drawings forming a part of this specification, in wlnch Figure 1 is a top plan of a boring and turning mill, with a part of the table shown broken away, embodying one form of my invention; Fig. 2 is a front elevation of the right-hand housing and arts carried thereby, and a part elevation a'n part section of the table and bed plate; Fig. 3 is a vertical section of the tablespindle and central tool-supporting bar; Fig. 4 is a plan of the driving motor and power connections with theztable and boring-bar sleeve; Figs. 5 and 6 are elevations of the table and sleeve-actuating gears; Fig.7 is a verticalsection of a boring-bar carried by a tool-head Fig. 8 is a cross-section of a crossarm, the saddle'andswivel-plate; Fig. 9 is a horizontal section of the tool-post and swiveL connection; Figs. 10 and 11 are a part plan and a part elevation of the mill, showing the method by which the part operated upon, or long overhanging tool supports,-may be rotated and artially supported by the station ary part oi the table. i The table of the boring and turning mill shown in the drawings'consists of a central revoluble section 1, an intermediate stationary continuous section 2, and an outer stationary non-continuous section 3. The outer section?) consists of polygonal plates radially arranged, and connected at intervals to the "outer periphery of the intermediate continuoussection 2. The intermediate section 2 is provided in its upper surfacewith two con centric guide-channels 4' and ,5 for a purpose to be described later, and both of the stationary sections 2 and 3 are directly supported on masonry. or other suitable foundations. The central r'evoluble section 1' is provided on its lowersidelwith a ta ered central spindle 6 by which it is held in' ed central position, and inner ando'uterbearing surfaces or ways 7 and 8 which rest-upon corresponding flanged ways 9 and 1O in'the upper surface of a bedplate 11, and by which the entire weight 'of jtherevoluble-section and parts carried theretapered spindle 6, and an inwardly-projecting ring 13 through which extend adjustable set-screws 14.

The central spindle 6 is made hollow and 2c the revoluble section of theftable. 1

provided with cylindricalbearing surfaces. 15

and 16 near its respective ends for the 'recep .tion of sets of adjustable wedge 'shape'dbear ing-blocks 17 and 18 for a rotary s eeve 19. The blocks 17 are actuated by adjustable set-screws 20 securedto the lower end of the cylinder 6', and" blocks 18 are actuated by long rods 21 connected therewith and provided at their lower ends 'withnuts 22 ar ranged on op osite sides of stationary parts 23 of the spin le 6.

The rotary sleeve 19 is outwardly flanged at its upper end and provided with a bearing surface 24 which engages a corres ondin surface at the upper end of the spind e 6, an

is extendedat its lower end below the end of the s indle 6 and provided with a spur-gear 25 w ereby. it. is adapted to be actuated in either direction independent'of-the motion of In the bore of the sleeve 19 is feathered a reciprocating tool-supportin bar 26, and at the upper end of the bore a eveled packingring 27 is provided. The tool-supportin 25 bar 26 is designedfor use in boring out an.

facin *ofl central parts such as the hubs of fiy-w eels and for cutting key-slots therein, and consistspf two hydraulic cylinders '28 and 29 connected by screw-threads. The

30 lower cylinder incloses astati'onary piston 30 and the upper cylinder a telescoping auxiliary tool-supportingbarBl which is adapted for use in boring opt holes of less diameter than the bar 26, and also constituting an extension of the bar 26 whereby holes of greater length'than the travel of the bar 26 may be .made. 1

The stationary'piston 3O comprisesa piston-head 32 and a hollow rod 33 supported in a block 34 connected'by pipes to any suitable pressure device and secured to a headplate 35 of a supporting-shell 36 bolted to the underside-of the bed-plate 11. Extending concentrically through the piston-head 32 and rod 33 is a tube 37 whicheXtends into block 34 and constitutes a conductor of the ressure-fluid to'th'e. top side of'the piston:

ead 32, while the space between the tube 37 and the hollow rod 33 constitutes a conductor of the'pressure-fluid to the under side *of the head 32, the rod 33 being provided with a port 38 near the head'for the passage of fluid into the c linder 28.

The lower by raulic'cylinder 28 is closed at its upper end by a disk 39, and at its lower end by a cylinder head 40 provided with a stuffing-box 41 for the piston-rod 33. A

passage-way 42 for conducting the pressure fluid from the lower cylinder into the upper .beneath the auxiliary bar 31 leads from the upper surface of the head 40, up lengthwise o the cylinder and through the disk 39, and at some point in the passage a plug-valve 43 is provided which is kept closed when the auxiliary bar 31 is not in use.

Theupper hydraulic cylinder 29 is pro vided at its up er end with a frusto-conical socket 44 in w rich a tool-holder 45mayIbe keyed, and at the lower end of the socket 44 a packed aperture is provided for the pas" sage ofv the auxiliary bar 31. 'A passage-way 46 for conducting the pressure-fluid from the space above the upper end of the stationary piston 30 to the upper side. of the auxiliary piston 47 leads through the disk 39 and up engthwise of the cylinder 29, and is provided with a lug-valve 48 which also remains closed w en the auxiliary bar31 is not in use. x

- The auxiliary bar 31 is provided at its upper end with a socket 49 for the reception 0 a tool-holder, and normally rests at its lower end upon the disk 39 with its upper end standing in the plane of the bottom of 'thesocket'44 in theltoohsupporting bar 26. vThis arrangement. of the central 'tool-supporting bar rovides' a readily-controlled means for fee ing it While it is being driven by the gear 25, or for reci rocating it up and down without turning'w en cutting a keyway. The means for driving the rotary table 1 .and the central tool support'ing bar 26 consists of a motor 50 located in a pit below the level of the table and connected through suitable reducing-gearingto .two shafts 51 and 52. Shaft 51 is provided with a bevelgear 53 which meshes with two larger .bevels gears 54 on the'ends of diagonal shafts 55 4 which carry at their other ends small miter gears 56 rneshiru with large gears 57 on short vertical shafts 57' located at diametric ally o osite oints with res ect to the IQ.-

Pg P

tary ta le 1, and carrying at t eir upper ends pinions 58 which mesh with agear-ring 59 secured to the rotary table 1 near its periphery. The other shaft 52 is rovided with two loose bevel-gears 60 an a feathered clutch sleeve 61 adapted to connect either gear 60 to the shaft, and these gears mesh with a larger bevel-gear 62 carried by a short vertical shaft 63 having a pinion 64 at its lower end which engages the la'rge'gear 25 on the central tool supporting-bar sleeve 19. The bearings 65 for the vertical shafts 57 are rigidly securedto an outer ledge 66 of the bed-plate 11, and step-bearings 67 for the lower ends of the shafts are secured to the masonry foundations. The bearings 68 Q arm is provided with a diagonal brace 78 at.

its back, which extends to and en ages a way :79 on its respective housing. T e'extreme 1nner end of the. cross-arm 73, as shown 1n Figs. 1 and 2, is stayed by a bracket 80' whichextends over the revoluble table 1 and bears at its inner end against the-back side of the cross-arm. The cross arms 73 and 74, as indicated in Fig. 8, each has a relatively narrow guide-way 81 at its lower side anda bearing surface 82 at its up eredge, whereby a double bearing is pro'vld ed for the saddle 83, and by means of which the latter is held,

from oscillating. The saddles 83 are each rovided with a vertical bearing-surface 84 in which is cut a circular bolt-groove 85 for the reception of a swiveled tool-head 86 for a boring-bar 87. The tool-heads 86 are each provided with two bearings 88 and 89 having cover- plates 90 and 91 adapted to clamp the boring-bar and hold it in adjusted'position. The means for moving each of the saddles 83 upon its respective cross-armcomprises hydraulic GYTIHClGI closed at its lower end and provided with a stufiin -box 98 at its upper end for the passage of aiollow piston-rod99, similar to rod 33 of theJcentral boring-bar, and adapted to conduct pressure-fluid therethrough to oppositesides-bf'its head 100: The bars 87 are each provided'on opposite.

sides with slots 101, and Ysurrounded-'byja sleeve 102 which isheld from turningthereonn I by feathers 103 en aging the slots; Each;.

I thereon a wormwheefl; 104, and journaled thereon an adjustable shell 105 provlded with a plane side having a' sleeve 102 has fixe circular bolt-groove l0yfor a swivel-plate;

107, which carries a tool-slide 108, and o'ppo-l site the plane side it is provided with an ex tension 109 in which is journaled a worm 110 which enga es theworm-wheel 104, and by. means of wiich the shell 105 and the toolholder mounted thereon may be swiveled about the ;axis"of the boring-bar "and held in adjusted position. The sleeve 102 extends somewhat-above the shell 105 and is provided with slots at diametrically opposite; sides for the reception of the lower'ends ofvertical rods 11]. and-.112 of rectangular seccross-piece 114 to which the piston-rod 99 is' tion, and loosely fitting the slots 101. The rods 111 and 112 are det achably secured at their lower ends to the 'sleeve 102 by setscrews 113, .and at their upper ends to a also secured. One of these rods, 112, is provided with rack-teeth 115 which engage a to suitable fluid-pressure pinion 116 mounted on the tool-head86 and connected by'reduci'nggears 117 and 118 to a hand-wheel 119 provided with a clutch-wheel 1202' The hand wheel 119 is provided as an auxiliary means for use in setting up and adjusting' the tool to the work, the -tool being fedand raised ,and lowered to posltion through the hydraulic means above described. Y

When the tool is employed in turning up the outer periphery of a part, the boring-bar- 87f may be lowered to rest at its lower. end upon the stationary table and bolted thereto, as shown in .Fig. 7, to prevent vibration. The raising and lowering oi the boring b ar is accomplished by first raising or lowering the piston 99 and parts carried thereby, securing it-in adjusted position through the clutch V mechanism of the hand-wheel 11.9, releasing the covet- plates 90 and 91, and forcing the bar 87 up. or down by regulating the flow of the ressurefluid.

1 W 'hen work of extra'large diameter isto be from and held from vibrating by shoes 122 bolted to the under side thereof and resting upon therguidechannels 4 and5 formed in the stationary table concentric with its axisn I operated upon, as indicated in Figs. 10 and 4 11, the part of the work, or the tool-supporting arms 121, as the case may be, which over' hangs the stationary table is supported there- The arrangement of the electric conriections for the motor, the piping for conveying the pressure-fluid to the various hydraulic actuated parts and, the oil-conductors for lubricating the 'various bearings have not been shown 01- described herein, for the "reason that they maybe of any approved of my invention.

construction, and in no wayconstitute a part It apparent that the form, construction and arrangement of parts ofthe device herein' "described-may be changed-and modified inrespects, withoutdeparting from my nvention;

many

. What I claim as new and desire to secure by Letters Patent of the United States, is- '1. A boringand turning mill provided with a cross-rail having a rack secured therei to, a saddle carried by said rail and provided :with a rack, gears of diiierent sizes rigidly connected together and respectively engag- .mg

said racks, and means to move said gears lengthwise ofsaid rail.

- 2. A boring and turning mill provided a cross-rail having a rack secured thereto, a saddle carried by said railand provided with a rack, gears of differentsizes rigidly connected together and respectively engaging said racks, and hydraulic means for movingsaid gears lengthwise of said rail, g

3.7 In' a-boring and turning mill, the combination of a bed plate, a revoluble table mounted thereon, .a tool-supporting bar carried by said bed plate and journaled in said table, and means'for rotating said bar independently of said table.

4; In a boring and turning mill, the combination. of a bed plate, a revoluble table mounted thereon, a tool-supporting bar mounted upon said bed plate concentric with said table,- and means for independently rotating and reciprocating said bar.

5. In a boring and turning mill, the com bination of a revoluble table, a tool-supporting bar located concentrically therewith and normall below the surface thereof, and means for independently rotating and recip- '15 rocating said bar. a

6. In a boring and turning mill, the combination of a revoluble table, a telescopic tool-supporting bar supported concentrically therein, and means for independently rotating and reciprocating said bar.

7. v In a boring and turning mill, the, combination of a revoluble table, an independently revoluble sleeve journaled' tl'ierein, a tool-supporting bar feathered in said sleeve,

and means for reciprocating said bar.

' 8. In a boring and turning mill, the combination of a revoluble table provided with a central bearing surface, a revoluble sleeve supported upon said bearing surface, a toolsupporting bar located vvithin said sleeveand feathered thereto, means for rotating said sleeve, and means for reciprocating said bar.

9. In a boring and turning mill, the combination of a tool-supporting bar comprising two hydraulic cylinders, an auxiliary toolsupporting bar located in the upper cylinder, a stationary piston located in the lower cylinder, and means for conducting fluid lander pressure to one or both of said cyliners.

10. In a boring and turning mill, the combination of a centrally-journaled table ,provided with peripheral gear-teeth, a lurality .of drive-gears located on opposite si es 0f.the

table axis-and meshin Wlth said teeth, and means for rotating sai I gears simultaneously.

11. In a boring and turning mill, the combination of a bed plate provided with a central vertical bearing, a concentric horizontal bearing-way adjacent said bearing and a second concentric horizontal bearing-way remote from said. vertical bearing, and a revoluble table having a central journal and 'horizontalbearing surfaces corresponding to JOHN RInnELLf Witnesses:

EDWARD WILLIAMS, Jr., BENJAMIN B. HULL.

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