US1806217A - Rivet setting and punching press - Google Patents

Description

y 1931. w. E. REES 1,806,217

RIVET SETTING AND PUNCHING PRESS Filed Oct. 16, 1928 INVEN TOR. M/a 1 #7 5 R555 BY W W5.

Patented May 19, 1931 PATENT OFFICE AWILLIAMEDWARD guns, or GAnANoQUE, ONTARIO, CANADA "nrvn'risn'rrme AND .runc rrnernnss.

' Application filed October 16, 1923; (Serial No. 312,792.

This'invention is an improvement in rivet setting and punching presses, and more parti'c'ularly in mechanism for connecting the operating means, as for instance, a pedal, to the punch, and in the construction whereby different sizes of frame arms can be used in connectionwith the press. A r

In the'usual construction of press of this type, the'connection between the pedal and theplunger issubstantially direct, the ratiobeing approximately one at the pedal to five 'at the work. The operation is tiring, and considerable noise and jar results. Be-

cause ofthe 'nature of the connection, a 1 movement of the pedal 1 is required very much greater than the movement of the punch.

'One'of the primary objects of the present invention is the provision of a construction wherein the movement of the pedal to operate the punch is greatly lessened in extent, and wherein the power available at the punch from the movement of the pedal is greatly increased.

Another object is the-provision of a construction wherein the poweris graduallyiir creased from the beginning of the stroke to the end, and wherein the maximum power of the stroke is obtained near the end thereof. Another object is to provide a construction of light weight, requiring a minimum of room, and operating with little noise and jar.

With these and other objects in view the invention consists in the construction and novel combination of parts fully described hereinafter, illustrated in the accompanying drawings, and pointed out in the claim appended hereto, it being understood that various changes in the form, proportion, size (and minor details of construction within the scope of the claim, may be resorted to without departing from the spirit of the invention.

In the drawings forming a part hereof Fig. 1 is a side elevation of the improved press.

Fig. 2 is a detail with parts in section of the connection between the punch and the 501pedal.

In the prejsent embodiment of the invention, at'runk 1 is proyidechusually of cast iron,'andhaving a threadedconnection with abase 2, which forms the' foundation of the machine." The trunk has one face formed to i provide a plane slide-way 1a, extending from the top to the base, or sufficiently far for the required adjustments of the arms to be described. A lower arm 3 is secured to the trunk at a suitable height, by means of machine screws 4, and this arm [carries the anvil 5, with its adjusting screw 6, a vertical bearing sleeve 7 being provided at the free'end of the arm for supporting the an vil and the screw.

-The upper arm 8 is secured to the trunk by means of machine screws 9, and it carries the punch 10 and the housing jllfor supporting the punch, the housing being integral with thearm. The arm also carries the driving plunger 12, the rivet pocket plunger,and theautomaticrivet feeding apparatus, as are usual in such machines, but which are omi ted 'from the drawings for the sake" of clearness. Each of the arms 8 and 8 is made indifferent lengths, and the lengths 'of each arm are interchangeable, so that any desired lengthor sizeof arm may be used. i j

The'lower arm-is adjustable on the trunk, that the improved press is adapted for:

every character'of worln It'will be under stood that the different lengthsof the arm 3 correspond to the diiierent lengths er sizes of' the arms8, so'thattheymafy be paired therewith. Both the lower and the upper arms are usuallyof cast iron, and a double toggle mechanism is provided for operating the punch or plunger.

One of the/toggles is arranged between the housing 11 and the plunger, and the other iskarranged between the'said toggle and the trunk, being' connected to the pedal to' be later described. The first toggle includes a link '14: connected at one end to the plunger, and at the other to a link 15 forming the other member of the toggle, and interme diate the ends of the said link. The link l5 is'pivoted to thehousing 11 at 16, and the pi-votal connection of-the links is shown at 13. The second toggle is constituted by members 18 and 20. The member 18 which is a link, ispivoted at 17 to that end of the v 1 link remote from the connection 16. The

7 tion 17: I v 1 The pedal22 is pivoted at one end at 23, l

.ly required to proper setting of'the rivet. In

1 to a bracket24 extending upwardly from the base: 2, and the other end ofthepedal is provided with a foot plate25. Arod or link26 connects the pedal intermediate its ends, with the arm intermediate itsends,

-Vbut nearer to the pivotal" connection 19 than 'the'connection -20.l The connection of the link-with the arm 20 isindic'ated at 26, and

' with the pedal 22 at 27. A spring 28 is ar--- ranged betweenfithe rod and the trunk,- and zq acts normally'to move-the pedal upward;

As; shown, the spring is connected with Q a sleeve 29 fixed on the link, and it normally holds the, parts inthe ,position'of- Fig. 1.

i It will be apparent from [the description 'Q that the connection between the pedal and is connected, a second link connecting the constituted by the-elements 1 1' and 15, and I,

the' plunger includes a; double toggle, one

the other; by'theeleinents '18 and 20, and that the second toggle is so. connected with the fiq first toggle, asto act to straighten the first toggle .when'the' second toggle is straightened by the :pedal; Thus amaximum of power is attained near the end of the stroke, where poweris needed. The first part of the ;wmovement of the pedal movesthe plunger 7 relatively quick, and with relatively small power. .Thelast part ofthe-pedalmovement moves'the plunger relatively;-slow,-but with a relatively 'largeincrease' in power,

I In operation, when the pedal isldepressed by theafoot of the-- operator upon thefoot plate, the arm 26. swings downward :as

. shown (in Fig. ;2, moving-the 'meinbers'of the second toggle toward straight position.

At the same-time the {first {toggle is moved toward straight position, and as the respective toggles approach straight position, that 1s, with-the members {of-the respective togthe link 18 remote from the pivotal conneccose veins, and because of this operators usually work only half time. With the present construction, fulltime can be made by the operator. 7

In the usual construction of press, a pressure of from 100 to2 lbs. is required upon the pedal,pin order to operate ther punch properly, and in presses of the hammer type, pressure as high as 800 lbs. is frequentthe present construction equal results are obtained with a pressure of from 30 to 40 and'pedal, anarm extending laterally from the top of the'trunk, a housing extending above ,'thearm in which the plunger is mounted, a curvedlever pivoted at one end to the-top of the housing and arranged with its convexity downward, a link connecting the leverto the plunger, an operating lever pivoted-tothe trunk and towhich thepedal outer end of the; operatinglever with the outer end ofthe curved lever, thepivotal connections of said second link; and the curved lever, andthe first link connecting Signed at Kingston in the county of Frontenac and State of Onatrio this 8th day of April an. 1929.

, WILLIAM REESQ glesmore nearlyinalinement, thepower'is 5q greatly increased,; and the f maximum, of 5 I power is neartheend of the stroke. "The more nearly the toggle is straightened, the

.less -jmovement of the'pedalqisrequiredto impart a maximum powerrton-the plunger.

The; pressure-V exerted.- on the: pedal has a ratioto-thepressure on the work, between the'plungerand. theanvil, of approximately one? to thirty, this pressure-being available onlyfonthe'last one-eighthj'inch of the 9 'downwards'troke. -;The movement of the pedal is}alsocushioned near-the end of the stroke, and-"jar and inoise are substantially I eliminated. i In the usual construction there is--a terrificzjar' on. the leg of the operator v(35.from therfimp w ,a f quent-cause of vari= H "nection of said curved lever and the first link connecting itwith the plunger,-

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