US991440A - Fluid-pressure riveting-machine. - Google Patents

Description

E. E. HANNA, P. W. GATES, CONSERVATOR.

FLUID PRESSURE RIVETING MACHINE.

APPLICATION FILED JUNE 15, 1909.

Patented May 2, 1911.

a sums-sum 1.

m M M m I E. E. HANNA, P. W. GATES, GONSERVATOR.

FLUID PRESSURE RIVETING MACHINE.

APPLICATION FILED JUNE15, 1909.

Patented May 2, 1911.

3 SHEETS SHEET 2.-

E. E. HANNA, P. W. GATES, CONSBRVATOR.

' FLUID PRESSURE RIVETING MACHINE.

APPLICATION IILED' JUNE 15, 11909.

991,440. Patented May 2, 1911.

3 SHEETS-SHEET 3.

Harare/0422i:

UNITED sT 'rEs .FfF O IcE. 1

ELMER ELSWORTH HANNA, OFTEVANSTON, ILLINOIS; rinnri'rus w. earns,

- GONSERVATOR. I, j

'rLum-mssunn swarms-Macrame.

' siding at Evanston, in the county of Cook and ate of Illinois, has invented certain new and useful Improvements in Fluid-Pressure Riveting-Machines, of which the fol lowing isa specification.

The invention relates in general to riveting machines, and more particularly to fluid pressure riveting machines of the type covered by United States Letters Patent Nos. 823,273 and 823,274 granted -on June In riveting machines of the type referred to, the dies are permitted to separate a sufficient distance to admit of the insertion of the material to be riveted, and during the riveting action the dies move toward each other with gradually increasing pressure until the desired -maximum pressure has been reached, after which the dies continue to move toward each other with substantially the attained maximum degree of pres sure. Thev distance through which the dies move toward each other at uniform maximum pressure is such that the machine when once adjusted for a given length of rivet and thickness of late will require no further adjustment or ordinary variations-in the lengths of the rivets, sizes of the holes, or thicknesses of the plates.

The object of the present invention is togrovide a riveting machine of the type above I escribed, which will be simple in jconstruc tion, efiicient in operation and durable-in use. The invention will be more fully described hereinafter with reference to the accompanying drawings, in which the same is illustrated as embodied in a convenient and practical form, and in which- Fi ure 1 is an elevational View showing the d es separated; Fig, 2, aview similar to Fig. 1, showin i the es moved together; Fig. 3, an end e evational view' looking from the right in Fig. 2; Fig. 4, anenlarged sectional detail; and Fig. 5, a detail view of the lever F.

Specification 01' Letters Patent. Application filed June 15, 1909. Serial Ho. 502,402.

Patented M a, 1911.

designate the same parts 'in the several figures of the drawings;

' The same reference characters are used to Reference letter A indicates the supporting frame, to which is connected in any suitable manner a die a of any desiredsize and shape. A die 6 which cooperates with the die a is carried inany suitable manner by means of a frame B relatively movable with respect to the su porting frame A. The frame B is preferab y made in the form of a bell crank lever and is provided with arms B, B spaced apart to straddle the frame A. The supporting frame -A and movable frame Bare pivotally connected as indicated at C. The frame B is provided with ears I), 6 between which is pivotally secured the lower end of alink D, which forms one member of a pair of toggle links. The uppermember of the' pair of toggle links is pivot-ally sup orted at its upper end between arms A, X wardly from and are preferably formed integrally with the supporting frame A. The

, upper member of the pair of toggle links consists of a pair of links E, Espaced apart at their upper ends by a collar 6; 'A pivot rod E extends through bearings a, .a' in the upper ends of the arms A, A of the frame A, and through the interposed u per ends of the links E, E and the mterme 'ate collar e.

F indicatesthe main operating lever, one' which project upend of which projects between the lower.-

ends of. the pairof links E, E. Alined circular trunnions F on the 'opposite'sides of the main lever F extend. within circular openings inthe lower ends of the links E, E.

The upper end of the lower link D of the pair of toggle links" is provided with a reduced. ontion d which extends into an opening 7 ormed in theflmainvoperating lever F, as clearly, shown in Fig.4. The reduced upper end d of the lower link'D is pivotal y connected within the socket f in the operating lever eccentrically to the axis of rotation of the trunnions F of the lever F relatively to the upper links E, E. The' socket f is located within the recess in the main operating lever against which the upguide links G being 'the supportin frame cate in a cylinder K. I

per .end d of the lower toggle link D engages.

A pair of guide links G arepivotally connected .to the main operating lever F inter mediate of its ends, the other ends of the pivotally connected to The end 0 the main operating lever F oppositeto its pivotal connections with the toggle links is pivotally connected to the outer end of a pistonrod it through the medium of the piston rod head 71. The piston rod extends into and is pivotally connected with a piston H mounted to recipro- K indicates the cylinder head and M a valve casing in which is incloseda suitable valve L for controlling the supply and exhaust of fluid pressure to the opposite sides of the piston H.

N, N indicate bail rods for supporting the riveting machine, the lower ends of such the piston H to .fluid pressure which moves other with a gradually increasing pressure,

the piston within the cylinder K. The movement ofthe piston through approximately;

the; first .half of its stroke serves, through the medium of the piston rod h, main operating lever F, and guide links G, to straighten the toggle links D and E until their center lines are substantially parallel, thereby oscil-.

lating the frame B relatively to the frame A and causing the dies to move toward each and at a gradually decreasing speed.. The

movement of the dies toward each other then continues at substantially uniform maximum v pressure and with substantially uniform speed duringthe movement of the piston /through approximately'the last half of its stroke. 'The toggling action practically ceases after the .movement of the piston through the: first half of its stroke, at which time the movement of the-diestoward each other has attained amaximum pressure, and

. the continued movement of the dies toward each otherat such maximum pressure during the'movement of the piston through the I last half of its stroke is due to the separation of the upper and lower members of the toggle links, by reason of their eccentric connection with the operating lever, that is, by reason of the axis of the pivotal connection between the end .d' of the. link D and the lever F being located eccentrically of the axis of the trunnions F of the lever F.

' toggle linksa It will be observed that by my improved rlvctmg machine the maximum workmg'or riveting pressure 15 continuous for a considerable 'distance,"so that when the parts words, thedistance of travel of the dies at a maximum pressure is sufficient to compensate for inequalities in the material being riveted thereby rendering the machine useful without subsequent ad ustment for rivet= ing different thicknesses of material. The gradual increasing pressure and decreasing speed during thefirst half of the movement of the piston serves to upset the end of the rivet, while the continued maximum pressure completely closes'the heads upon the plates or material, forcing the same together and completing the final union thereof.

' I claim:

1. In a riveting machine, the combination with a pair of dles, of means for relatively moving said dies toward and away from 'each other, comprising toggle links, an operating lever to which areeccentrically pivotally connected the adjacent ends of the a guide link pivotally connected to sai lever, and means for applying power to said lever;

2. .In a riveting machine, the combination with a pair of dies, ofmeans for relatively moving. said'dies toward and away from each other, comprising toggle links, an operating lever to one end of which are eccentrically pivotally connected the adjacent ends of said toggle lings, means for apply: ing power to the other end of said lever, and

means for guiding said lever during its .movement by said power means.

3. In a riveting machine, thecombination' with a main frame, of a supplemental frame pivotally connected to the main frame, opposing dies on said frames, tog le links interposed between said main an su' plemental frames, a fluid pressure cylindgr rigidly mounted upon said main frame, a reclprocarting piston in said cylinder, a lever to one end oftwhich are eccentrically ivotallyconnected the adjacent ends of said toggle links and to the other end of which said piston is operatively connected, and a uide link pivotally connected to said lever mtermedn ate its ends and to said main frame. 7

v 4. In a machine of the character described,

the combination with a main member, 'of a supplemental member pivotally connected to themain member, a pair of linkspivotally supported by brackets on the main member,

' Y axis of the trunnions thereon, a guide link I ivotally connected to said lever, andmeans a lever extending between and haying trunnions engaging bearings in said links a link, pivotally connected at one endto said supplementalmember and pivotally connected 5 at its other end vto said lever eccentric of the or applying power tosaid lever.

In testimony whereof, I have subscribed v I my name.

' PHILETUS W. GATES, Conservator for Elmer Elswo'rth Witnesses:-

Gno. L. WILKINSON,

ANNIE C. GoUR'rnNAY;

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