US1968128A - Kick-out for metal working machines - Google Patents

Description

July 31, 1934.

w. 1.. CLQUSE KICK-OUT FOR METAL WORKING MACHINES Filed Nov. 10, 1930 awe ump. I

ML. Clay $6 awe/MM Patented July 31, 1934 Ice I KICK-OUT FOR METAL WORKING MACHINES 'WilliamL. Clouse, Tiffin; Ohio, assignor to The National Machinery Company, Tiifin, Ohio Application November 10,- 1930, SerialNo. 494,787 I 10 Claims.

This invention relates to a kick-out for metalworking machines whereby an article shaped in a heading orzforging machine can-be forced readily from the die recess in which .it is held so as to clear the die for the reception of another blank.

The primary object is to provide a kick-out which will start the article gradually to break its intimate contact with the shaping die and thereafter eject it with a rapidly accelerated motion.

' Another object is to provide a kick-out having a powerful leverage action whereby the shaped forging can be dislodged from the die recess. 2

With the foregoing'and other objects in view which will appear as the description proceeds, the

invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be'made' within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawing the preferred form of the invention has been shown. 'Said drawing is a view partly in section and partly in elevation showing portions of a heading ma,- chine equipped with the present improvements.

Referring to the drawing by characters 'of reference, 1 designates a stationary die with which ,co-operates a movable die 2.- The die 1 has a kick-out plunger 3 slidable therein and constituting an abutment for the blank B while being shaped. This plunger bears against the rounded end a of a kick-out lever 5 and the said end also fbearsnormally against a stop 6. This stop preferably alines with rod 3 and can be adjustably mounted by screwing it into its support 7 as shown.

fever 5 is fulcrumed between its ends at 18 and'one arm thereof isengaged by an elongated rounded cam 9 fulcrumed. at, 10 and having an arm'lL' A rod 12 can connect the arm ll'to'an eccentric, or to an arm 13.carried by an operating shaft 14 whereby an eccentric movement or the, like. will be set up to actuate the rod .12 in properly timed relation with the movable die 2. Under normal conditions the kiok-out'mechanism is positioned as shown by full linesin movesthru its arc, the lever 5 starts from zero the drawing- A blank B can then be carried to the stationary die where it willuabut against plunger 3 during theshaping operation. 4

After'die 2 has moved away from the shaped article as shown in the drawing, the shaft14 can be caused to rock. This will operate the kick off mechanism. It will be noted that the portion of cam 9 nearest the fulcrum 10 is concentric therewith. The working edge of the cam then curves gradually away from the fulcrum and forms an elongated active surface. Consequently, when rock shaft 14 transmits motion through arm 13 and rod 12 to arm 11 the cam will be shifted'quickly from its full-line position to the broken-line position shown. As lever 5 constantly bears against the cam and is normally close to the fulcrum 10 the first movement of the cam will result in a very slight movement "of the lever but a powerful leverage will be exerted as will be obvious.

This slight initial movement will be sufiicient to cause lever 5 to press plunger 3 longitudinally a'sumcient distance to break theintimate contact of the shaped blank B with the, die 1. Thereafter the earn 9 will speed up the movement of the lever 5 and kick-out plunger 3 with the result that the loosened blank will be ejected and the die prepared to receive another blank.

Theinsertion of a new blank can be utilized for returning the kick-out mechanism to its original position or, if preferred, the parts can be returned by a spring or other mechanical means provided for that purpose. I

Up to the present timemanufacturers of rivet and bolt heading machines have overlooked the 5 fact, that rapidity of a kicking blow has caused the kicking tool 3 to'upset the back end of the rivet shank B so that added wear was thrown upon the die lin pushing out the swelled or upset rear end of shank B; Heretofore no cam- .operated construction hasoperated at aspeed sufliciently slow to kick outthe shank without 7 .upsetting, or swelling, it. As: quite a travel has been necessary in order to handle long lengths of work and as there isa limit tothe number of degrees of the revolution of the shaft during which the work must be ejected, a cam with a high hill has been necessary. As a result of previOflSefforts at a kicker device/it has been necessary to use an excessive speed-instarting and this has tended to upset the end of the work on account of the blow imparted. In the present deviceithe lower endof the lever .5'remains in contactwith the concentric portion of the cam portion'9 of the lever 11', and as. the leverll ':c0nta ct;point. to-the fulcrum 8*on' the lever .5. "110 However, after this first slow motion, which pushes the blank B out of the die without upsetting the back end, has been accomplished, then the contact point of the cam 9 raises to a point higher up on' the lever 5, with the result that the distance from the fulcrum 10 to the point of contact on the earn 9 rapidly increases, giving a longerlever arm, and at the same time, as the point of contact of the cam 9 approaches the fulcrum 8 of the lever 5, the movement of this lever arm decreases, with the result that there is a high rate of acceleration between the operating lever 11 and the ejecting lever 5. The two cam surfaces cooperating as they do on the levers 11 and 5 make possible an extremely slow movement of the lever 5 during the first part of its stroke, and still enable the blank B to be kicked or ejected from the dies in the necessary length of time on account of the acceleration of the lever 5 at the finishing end of its stroke.

What is claimed is: r

1. In a metal-working machine a shaping die,

.a blank ejecting plunger therein constituting an abutment for a blank in the die, a stop, a kickoutleverihavingjone end normally between and in contact with the plunger and stop for transmitting thrust from one to the other, and means engaging the lever for moving it and the plunger gradually. from a standing position to gently dislodge a blank in the die and with rapid acceleration to blank ejecting position, said means including an oscillating cam mounted to work'in the same plane with the kick-out lever and having a lever engaging face one end portion of which is concentric with the axis of rotation of thecam and merges into a portion which diverges abruptly from said axis, and means for rocking the. cam to advance its point of contact with the lever from said concentric portion along the lever toward the axis of the lever, thereby to shorten the distance between said axis and said point of contact and correspondingly accelerate the movement of the lever.

2. In a metal-working machine a shaping die, a plunger therein for ejecting a blank and constituting an abutment for the blank in the die, a stop, means for transmitting thrust from the plunger to the stop,'and mechanism-proportioned and positioned to actuate said means to move the plunger gradually from a standing position to .gently loosen'a blank'in the die and with rapid acceleration to blank ejecting position, said mechanism includinga lever having-one end between the plunger and stop, an elongated cam engaging the other end'of thelever and having a working face diverging abruptly 'from a portion'concentric with the axis of rotation of the cam, and means for swinging the cam in the plane of movement of the lever to 'advance'the point of contact between the cam andlev'er toward the axis'of the lever, thereby to accelerate the movement of the'lever.

3; In a metal-working machine a shaping die, a .blank ejecting plunger therein constituting an abutment for a'blank in the die, a stop, a kick- "out lever having one "end interposed between and transmitting thrustfrom the plunger-to the stop, and mechanism'fo'r'actuating said lever to 'move the plunger gradually from a' standing position and with rapid acceleration to blank ejecting position, said mechanism including a ,leverrnounted for oscillation having an elongatted cam initially engaging oneend of the kickout lever, and said camhavmg 'a'working face .iiiverging i'abruptly from a portion concentric a kick-out plunger therein constituting an abutment for a blank being shaped, a kick-out lever having one arm in contact with one end of the plunger, an oscillating lever having a portion concentric with its axis'of movement from which is extended an arm having an elongated convex cam-edge merging gradually into said concentric portion, said concentric portion being in contact with the other arm of the kick-out lever, and means for swinging the cam lever toward and in the plane of movement of the kick-out lever, said levers being shaped and relatively mounted to gradually transfer contact with the kick-out lever from the concentric portion to the cam portion of the cam lever during the swinging of the cam lever in one direction, thereby to start the kick-out lever at zero and thereafter transfer thrust thereagainst from the cam portion at points advancing toward the axis of the kick-out lever, thereby to actuate the kick-out lever minutely at first to thrust slowly through the plunger against the blank to loosen the blank without upsetting it, and then rapidly to accel- Jerate the kick-out lever to expel the blank, the

levers being proportioned and timed to produce a relatively long stroke of the plunger during a said means including a kick-out plunger'consti- 'tuting an'abutment for the blank, a leverengaging the plunger, and a cam for thrusting against the lever progressively toward the axis of the lever thereby to impart an initial minute movement to the plunger while in contact with the blank to loosen the blank from the die and for subsequently accelerating the movement of the plunger to eject the blank.

6. In a machine for upsetting metal blanks,

a shaping die, and means for ejecting the upset I blank from the die without expanding the blank, said means including a kick-out plunger constituting an abutment for the blank, and contacting levers one of which engages the plunger,

said levers cooperating to advance their point of, contact toward the axis of one ofthe levers thereby to exert maximum leverage at'minimurh "speedto impartan initial minute movement to the-plunger while in contact with the blank there'- by to loosen the blank in the die without ex-x 'panding it, and to simultaneously acceleratethe Fstroke'of the plunger and proportionately'reduce the leverage 'to' eject the loosened blank.

'7. In a machine for upsetting metal blank-ac. shaping diefand means for ejecting theupset "blank from the die without expanding theblank, said means including a kick-out plunger constituting an abutmentfor the blank, an o'perat- 7 ing shaft, and avariable driving connectionbetween the "shaft and the plunger including a 1, kickout lever bearing against .the plunger, an oscillating lever bearing against and working in the plane of movement of the kick outleverand -having'a portion concentric with its-axis 'and Tanelongated campo'rtion, and means for-'actu ating the oscillating lever, said variable drive connection and lever being proportioned and arranged to transfer thrust gradually against the kick-out lever from the concentric portion to the cam portion and along the kick-out lever toward the axis thereof thereby to exert maximum leverage at minimum speed and minutely actuate the plunger to loosen the blank without expanding it, and thereafter exert diminishing leverage at increasing speed to accelerate the stroke of the plunger and eject the blank.

8. In a machine for upsetting metal blanks, a shaping die, and means for ejecting the upset blank from the die without expanding the blank, said means including a kick-out plunger constituting an abutment for the blank, and variable driving means for the plunger including a kick-out lever, one arm of which constitutes an abutment for the plunger, an oscillating lever having a portion concentric with its axis and an elongated arm, and means for actuating the oscillating lever to transfer thrust therefrom progressively along one arm of the kickout lever toward the fulcrum thereof thereby to actuate the kick-out lever initially at minute speed with maximum leverage and subsequently at accelerated speed and proportionately reduced leverage, thereby to initially loosen the blank gently in the die and subsequently eject the blank at high speed.

9. In a machine for upsetting metal blanks, a shaping die, and means for ejecting the upset blank from the die without expanding the blank,

said means including a kick-out plunger constituting an abutment for the blank, a kick-out lever in contact with one end of the plunger and having an elongated arm, an oscillating lever having a portion concentric with its axis and an arm with an elongated convex surface merging into said concentric portion, said elongated arm being initially in contact adjacent to its free end with the concentric portion and said convex surface constituting means for thrusting against the elongated arm progressively toward the fulcrum of the kick-out lever, thereby to actuate said lever initially at a minimum speed with a maximum leverage to gently shift the plunger and loosen the blank, and thereafter propel the plunger at a rapidly accelerating speed with a leverage reduced in proportion to the increase of speed, to expel the loosened blank.

10. In a metal working machine a plunger for ejecting formed blanks, a lever for thrusting against the plunger, an elongated cam having a concentric portion and an eccentric portion, said cam normally contacting with the lever, and means for actuating the cam to transfer thrust to the lever from the concentric portion and then from the eccentric portion, progressively toward the axis of movement of the lever, thereby to convert the movement of the plunger from standing position into rapidly accelerated sliding movement to gently dislodge a formed blank and quickly eject it.

WILLIAM L. CLOUSE.

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