US893239A - Machine for turning eccentric rings. - Google Patents

Description

PATENTED JULY 14, 1908:

G, p. GRIDLEY. MACHINE FOR TURNING EGGE'NTRIG'BINGS.

APPLICATION FILED NOV. 24, 1905.

3 SHEETS-SHEET 1v fio. 893,239. PATENTED JULY 14, 19-018."

' G. 0. GRID'LEY.

MACHINE FOR TURNING EGGENTRIG RINGS.

APPLICATION FILED NOV. 24, 1905. v

' 3 SHEETS-SHEET 2.

PATENTED JULY 14, 1908.

'Gj'o. GRIDLBY. MACHINE FOR TURNING EGOENTRIG RINGS.

3 SHEETS-SHEET 3.

APPLICATION FILED NOV. 2.4, 1905.

' To all wit-may concern:

Be it known that 'L'Gnonen O. GRI'DLEY, OfWlIidSOI-,il1th6 county. of Windsor and sEoRoE'o. G-RIDLEY, or'wrunson, VERMONT.

- MACHINE m 'runivme EcoEN'rmc nines State of Vermont, have invented certain new and useful Improvements in Machines for Turning Eccentric Rings, of which the following 1s a specification.

This invention relates to. metal working machines, and-{more particularly to those applicable -to the production of eccentric rings, such as used for packing pistons, and thelike 3 i It has for its principal object the pro vision of an eflicient machine whereby the rings. maybeautomatically bored, turned eccentrically, and cut ofl from a suitable blank.

In the accompanying drawings, in which designate like parts front elevation of one embodiment of my invention.- Fig. 2 is an enlarged broken end elevation thereof looking from the right in 3' is an enlarged broken top 1 plan view. g. 4 represents a section on .the line 4.4 of. Fig. 2.

' tion 18 The numeral 10 designates a supporting frame, in-Which is journaled a work-spindle 11 rotatable at the desired speed by fast and loose pulleys 12 mounted upon a drivingshaft which is connected to the work-spindle by gearing inclosed in a case 1'3.v Fixed to the spindle is a face-plate 14, upon-which may be bolted a blankor hollow cylinder B from which the rings are to be formed. Mounted to slide in ways 15 atone end of the frame is a tool support 16 which may be reciprocated longitudinally of the work-s indle by a feed bar 17 extendin through t e frame to the opposite end. flere it has a contact projecpreferably providedwith a roll 19 cooperating with a cam-face 20 upon the ei'lphery of a cylinder 21. The cylinder 1s astup-on an actuating shaft 22 mounted to rotate in the lower portion 'of the frame, and geared to the driving shaft or being operated a in any other convenient manner.

Fixed to the support 16 is a post or toolholder 23 adapted to receive a boring bar 24, the axis of which is situated 1n almement with that of the work-spindle and which carries at its inner extremity a tool 25, the cutting edge of' which operates over a surface concentric with the spindle axis. Projecting from'the rear of thesu port is a block 26 having ways 27 forme in'itsupper face,

Specification of Letters Patent.

' Patented Jul 14, loos.

Application filed November 24,1905. seen No. 28 8,845.

I these ways guiding a tool-holder 28 having a recess to recelve a turning tool 29 which may be secured in position by set screws 29. Depending from the holder through anopenmg in the block 26' are separated lugs or projections 30, having adjacent parallel faces between which'is guided a slide 31. In the shde 1s a bore to receivean eccentric 32 'splined upon an actuating shaft 33 journaled in'the block 26 and in the frame. This actuating shaft isrotated at the same speed as the spindle by a spur-gear 34 meshing with a similar gear 35 of the same pitch diameter and having the same number ofteeth, this latter gear being secured upon the-spindle adjacent tothe face-plate. From the front of the frame near the faceplate projects' an arm'36 upon which is mounted to slide a block 37 carrying a tool support 38. The tool support may be adjustably mounted upon the block by means of bolts 39extencling into the undercut slots 40 in said block. This arrangement permits a variation in the position .of the support 38 longitudinally of the spindle axis. A portion 40 of the support 38 which serves as a holder is shown as inclined at an angle to the spindle axis, it diverging therefrom as it approaches the spindle, are slots 41 in which are located cut-off tools 42, there being such a number of these as will divide the block into the desired number of rings. The tools are shown as clamped in the slots by plates 43 bearing upon their upper edges and retained in place by screws 44 threaded into the holder. The

cutting edges of the tools are preferably situated atsuccessively greater distances from the spindle or lie in a line inclined similarly to the adjacent edge of the holder. They may be adjusted with respect to their pro j ection beyond the holder. by screws 45 threaded through avertical wall 46 at the outer side of the holder and contacting at their inner ends with the extremities of the tools. As illustrated, the support 37 is reciprocated laterally of the spindle by a lever 47 fulcrumed upon the end of the frame at 48. From the lower end of the lever is a projection 49 co-acting with a cam-face upon a disk 50 fast upon the end of the actuating shaft work-s indle tion, t e boring bar and the turning tool,

since they are mounted upon a common sup-- port,'-advance simultaneously to bore out the interior of theblank; concentrically with the spindle axis and to turn off its exterior eccentrically,*this latter operation being effected by the reciprocation ofthe holder 28 which is moved by- Its eccentric sufficiently to give a turni minimum chip at one side of the blank and a maximum at the opposite side, the difference between the two being in roportion to the e boring'bar and tool move alongthe work the cuteccentricity desired. As t 4? completesa cut over the entire inner surface of the cylinder at substantially the same instant, so that the ring. is left wholly free to fall from the blank and is supported by the bar. If the eccentricity were attained by boring out the blank of! center, the ring would be severed first at one side and by its retention by the thinned portion would tend to swing to one side, causing the remainder of the cut to be made out of trueand possibly causing breakage of the tool. The cutting of! thus continues until the last of the series of tools has passedthrough the turned blank,

when the operation upon thatparticular blank; is com leted and the ri' I o'ved fro'mt chat and a new' lank applied maybe reto' the iace-Dlate.

The machine being in m0' coin? rear. of the turningtool as the turni "moves-along the work, and means for simul- It will'be seen that this machine acts automatically throughout the operation upon each blank, and that the rings are roduced rapidl and accurately without un' ue. strain upon he tools or their sup orts.

Having thus explained t e nature of the invention, and described a wayof constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the modes of itsuse, I declare that what I claim'is:

1. A machine of the character described comprising a work spindle, a boring tool'arranged concentrical turningtool, means for reciprocating the tool to produce an eccentric surface on thework, a plurality of cutting-off tools arranged to successively engage the work in thel too y with the spindle, a

taneously-feedin said turning tool, said bor- .ing tool, and sai cutting off tools.

' 2. A machine of the character described, comprising a work spindle, a tool slide, a boring tool on'said slide arranged concentrically with the spindle, a turning tool on said slide, means for reciprocating said turning tool to produce-an eccentric surface on the work, a plurality of spaced cutting-off tools arran ed with their cutting edges in a line incline to the axis of the spindle, a second slide for supporting the cutting-01f tools, and means for simultaneously actuating said slides substantially as set forth.

' .In testimony whereof I have aflixed my signature, in presence of two witnesses.

- GEORGE O. GRIDLEY.

M. BJMAY, CLO. STECHER.-

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