US1319708A - Nut-machine - Google Patents

Description

E. HOLLINGS.`

NU MACHINE.

APPLICATION FILED Ame, 1911.

l 3 l 9X9@ Patented Get. 28, 1919.

3 SHEETS-SHEET l.

Tm; CDLUMBIA PLANOURAPII co, WASHINGTON, D4 cy www@ ` E. HOLLINGS.

"NUT MACHINE.

APPLICATION FILED APR. 6, i911.

Patented Oct. 28, 1919.

3 SHEETS-SHEET 2- -rnn rm mnu N mounwu' cn., wAsNumTow, nu;

E. HOLLINGS.

NUT MACHNE.

APPLICATION msn APR.6,1917.

Patented 001;. 2&5, i919.

3 SHES-SHEET 3.

UNlTE ERNEST HOLLINGS, lClIE CLEVELAND, OHIO.

NUT-MACHINE.

Specification of Letters Patent.

Patented Oct. 28, 1919.

Application filed April 6, 1917. Serial No. 160,206.

To all whom it may concer/a:

Be it known that'I, ERNEST HOLLINGS, a subject of the ling of England, residing at Cleveland, in the co-unty of Cuyahoga and State of Ohio, have invented certain new and useful lmprovements in Nut-Machines, of which the following is a specification.

lThis invention relates to nut forging 1na chines of the type which utilizes a hollow die block and two or more plungers and punches for working a nut blank therein. ln such machines the central punching or slug is usually forced into the hollow plunger' against the retreating punch therein, which later advances and ejects the punching fromv the plunger. Frequently the punching adheres to the punch when it emerges from the plunger, due to fins or uneven places on the punching or because of magnetic or other attraction of the punching to the punch, so 'that it does not drop off, thereby interfering with the next operation and possibly causing` injury to the tools.

The object of this invention is to provide means for kicking olf the slug from the punch or plunder thereby protecting the machine and avoiding the possibility of in jury thereto.

The invention comprises the construction and arrangement of parts hereinafter described and clain'led.

ln the drawings, liigure 1 represents a longitudinal sectional elevation through a. nut machine embodying the invention; 2 is a similar detail view, on a larger scale, showing the kick off device; Fig. 3 is a plan view thereof; Fig. f1 is a detail end view from the left in Fig'. 3; Fig. 5 is a detail sectional elevation showing another embodiment of the invention; Fig. 6 is a plan view thereof; and Fig. 7 is a detail end view from the left in Fig. 5.

The nut machine shown in the drawings is an improvement upon the. machine shown in my Patent No. 1,255,166 for nut machine granted February 5, 1918, to which reference may be had for a more complete description of the main features of the inachine. Briefly described7 it comprises the usual die block 1, upper and lower indenter carrying slides 2, reciprocating hollow plungers 8, 3a, and reciprocating punches 4,-, 4a. Slides 2 are actuated by cams 5 on a shaft 6.

Plunger 3 is on a slide 7, while punch La is carried by a block 8 slidably mounted in said slide '7. Slide '7 and block 8 are actuated to produce the necessary independent recprocating movements of said plunger andV punch by cams on a shaft 9. Plunger 3 is carried by a slide 10 actuated by a connecting rod or rods 11, connected to an eccentric 12 on shaft 13, while punch t is carried by a Iblock lt sliding in slide 10 and actuated by a spring 15 and a cam 16 on said eccentric. Shafts 6, l) and 13 are intergeared and driven in unison by power applied to the pulley 17 on the driving shaft H.

So far as described the machine is identr cal with that of my prior patent referred to.` In operation the bar is indented and the nut blank sheared therefrom and carried into the die by the plunger where it is compressed between the two plungers 3. 3 and expanded by the punches t, 4 which also enter the blank and reduce the thickness of the punching and then move endwise to shear it out from the blank. Plunger 3 and punch l then retreat, carrying with them the punching, until the parts reach the position shown in Fig. 2, in which the plunger has retreated beyond the punch, causing the latter to protrude from the plunger and eject the punching. During the retreating movement of the plunger the kick ott' device now to be described is actuated to kick ofi' the punching from the end of the punch and insure its removal therefrom.

In the forms shown in Figs. 1 to -t the kick off device comprises an arm 19 pivoted upon a transverse axis 2O on the stationary frame and carrying` intermediate its ends a roller or projection 21, and having its advance end extending laterally to form a linger 22 adapted by oscillation oi' said arm to move across vthe end face of the punch when the latter is retracted, as in Fig. 2. Said arm is held downwardly by a tension spring 23. Its roller 21 lies over a cam plate 24- attached to the plunger slide 10 and having an inclined upper operating edge 25 and a horizontal elevated portion 26.

lVith this arrangement when the plunger and slide are advanced the roller 21 rides up the incline 25 to the horizontal portion 2G and lifts the finger 22 out of the way of the punch and plunger, but when the slide lO retreats the roller rides down over the incline and the finger 22 moves across the end face of t e punch and kicks off the slug should it stick to the punch.

Various other arrangements are also suitable for the purpose. For example, in Figs. 5, 6 and 7 the kick orf device comprises an arm 27 pivoted upon a shaft 28 carried by the plunger slide 10, and which arm has a finger 29 adapted to move across the face of the punch. Arm 27 also carries a gear segment 30 whose teeth engage a rack 3l Carried by the stationary frame of the machine.

With this arrangement retreating or backward movement or the slide moves the nger 29 down across the punch, while advancing movement swings it up out of the way of the punch and plunger. y

The construction described is simple and protects the machine against injury by slugs, which might cause damage if not removed. The invention can obviously be applied to nut machines with various arrangements of punches and plungers and is not restricted to the particular machine shown.

That I claim isl. A nut machine, comprising a frame, a stationary die block thereon, a reciprocating slide on said frame carrying a plunger working in said die block, a. sliding punch Within said plunger, a swinging arm carried by said slide having a portion movable across the end oi the punch and plunger when retracted i'or removing aslug from the punch, and means controlled by the reciprocating movement of said slide for operating said arm.

2. A nut machine, comprising a frame, a stationary die block thereon, a. reciprocating slide on said frame carrying a plunger working in said die block, a sliding punch within said plunger, a swinging arm carried by said slide having a portion movable across the end of the punch and plunger when retracted for removing a slug from the punch, a gear segment connected to said arm, and a stationary rack on the Jframe cooperating with said segment for operating said arm.

In testimony whereof I ailix my signature.

ERNEST HOLLINGS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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