US2454143A - Die set with feeding means - Google Patents

Description

Nov.` 16, 1948. A. J. ENGLAND l 2,454,143

` DIE SET` wml FEEDING MEANS y FiledNov. 19, 194s 3 sheets-sheet 1 ff 26 n minimum A V JNI/ENTo/e.

zzguSz/J/fg/a/fa/ Nov. 16, 1948. i A. J. ENGLAND 2,454,143

DIE SET WITH FEEDING MEANS 3 Sheets-Sheet 2- Filed Nov. 19, 1946 INVENTOR.

AT TOPNE YS Nov. 1'6, 19048.i A J. ENGLAND 2,454,143

` I DIE SET WITH FEEDING MEANS 'Filed Nov. 19, i946 3 Sheets-Sheet 3 I HHH N INVENTOR.

ATTORNEYS.

Patented Nov. 16, 1948 DIE SET WITH FEEDING MEANS August J. England, Providence, R. I.

Application November 19, 1946, Serial N0. 710,755

6 Claims.

This invention relates to a die set with feeding V means assembled therewith. w

In the operation of dies the means cooperating with the dieing thrust for feeding the stock is usually fully automatic.` However, the arrangement is such that some manipulation is often required to cooperate the feeding means with the dieing thrust. In instances where a feeding means has been combined with the dies usually no Sufficiently positive feed is provided for.

One of the objects of this invention is to provide a feeding means which will be assembled on and operate in response to the relative movement of a pair of dies and which will be positive in its action.

Another object of this invention is to provide a positive feed which will engage a part of the work for moving the same forward while a stop is provided to limit the amount that the work is fed forward.

Another object of this invention is to provide for the release of the stop means when the feeding device operates.

Another object of this invention is to provide all of these parts in a rather simple construction.

Another object of this invention is to provide all of these parts in a single unit which may be assembled on the machine at one time.

With these and other objects in View,` the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a side elevation of a die set with my feeding means in combination therewith;

Fig. 2 is a sectional View on line 2--2 of Fig. 1 looking downwardly on the lower die;

Fig. 3 is a sectional view on line 3-3 of Fig. 2;

Fig. 4 is a sectional view on the staggeredline 4 4 of Fig. 2;

Fig. 5 is a sectional View on line 5-5 of Fig. 2;

Fig. 6 is a sectional view similar to Fig. 4 but taken parallel thereto in a position to show the relative positions of the feed ngers and stop finger;

Fig. '7 is a sectional view on line 1 1 of Fig, 2;

Fig. 8 is a perspective view illustrating diagrammatically the engagement of the two fingers with the work;

Fig. 9 is an elevation similar to Fig. 1 showing the modified form of device;

Fig. l0 is an end View of the structure shown in Fig. 9;

Fig. 11 is a perspective View of the carriage which mounts the feed dog in the modification of Figs. 9 and 10;

Fig. 12 is a fragmental elevation showing a still further modification of carriage for the feed. dog and modified actuating abutment.

In proceeding with this invention, I mount such as a feeding finger and a stop finger, the` feeding finger being arranged for reciprocating movement which will be actuated by some abutment or means which is carried by the upper die and be engaged as the dies relatively move.

With reference to the drawings: 9 designates generally a ,die of the follow type wherein the upper die block carries a piercing tool P, a forcer or shaping plunger or tool F and a blanking plunger B. The lower die block carries the dies associated therewith which have the cavities or openings CP, CF, and CB. The tools and dies are arranged in tandem fashion so that after the first operation the stock is fed to the next point and a second operation performed and the workpiece cut from the stock by the blanking plunger B, all in a manner well known to workers familiar with die sets of this general character. It is here pointed out that the above is merely an exemplary procedure and is significant only as to the last step wherein an area of the stock is removed, leaving an opening by the operation of the blanking plunger CB. The machine on which the die set is attached is designated I0 and the lower` die block II has mounted thereon a cutter plate I2 upon which there are stock guides I3, I3', and a stripper plate I4. The `stock is i'ecl between the guides I3, I3 as at I5 (see Fig. '7) and is held in position between these guides by a shoe I8 pivotally mounted as at I1 in a lever `I8 which is pivoted as at I9 and drawn downwardly by spring 20 engaging the reduced end portion thereof. The pivot I9 of this lever is supported on the post 22 which extends from thedie block I I and which is held in position by the screw 23.

Spaced from the cutter plate I2 (see Figs. 5 and 7) are members 21 which are spaced from each other and provide guides for guiding the movement of `a carriage 26 in a linear path at the edge of the cutter plate I2. Each guide 21 is in the form of an L-shaped block which proe vides a portion 28 to extend over the upper edge of the carriage 2E. Screws 3l, 32 serve to hold these parts 21 vin position. The carriage is provided with arollr 33 at one end and a spring 34 engages` a pin 35 `on the carriage and a pin 36 on a member 21 to draw the carriage in one direction to the left as shown in Figs. 1 and 2.

The upper die block 40 `(see Fig. 1) is guided by means of posts 42 extending upwardly from the lower die and sockets `43 in the upper die as the same is reciprocated from some plunger which is not shown. This upper die block carries an abutment or cam 44 to engage the roll 33 and move the carriage 26 against the action `of the spring 34. H

The carriage 26 has an L-shaped block 45 mounted upon it (see Fig. 3)` by means of a slot 46 through the block and a screw 41 passing 3 through this slot and into the carriage 6. A tongue 48 and groove 4t in cooperation with the slot and screw serve for adjustment of this block 45 relative Ito the carriage. This block carries a yoke 5d by reason of the slot 5i for the reception of the overhanging portion 52 of the block that the yoke may be adjustably held on the block by set screw 53 (see Fig. 2) extendingV through the yoke and engaging the block. A groove or recess 56 (see Fig. 3) receives the feed nger 5I which is pivotally mounted therein on a pin 54' secured by set screw 55 in the yoke. In order to urge this feed linger downwardly spring 58 .(see Fig. 2) is mounted by means of screw 59 on the yoke to engage .the edge of this. feed finger andurge itdownwardly. Thefeed finger .has at one Yend thereof a hook Ewhich is so shaped .as to engager a cut out portion or .opening left in the stock when the Work-piece has been blanked therefrom so that movement of the slide when this hook is engaged with vthe opening O will move the stock forward..

On a, portion which is fixed relative to the die block Il such for instance as the block iii, I l,

pivotally mount a stop finger 62 which .is off set as shown in Fig.2,so asto'beproperly positioned. with .reference to the work. Thisiinger is pivotedas at 63 (Fig. 4). and is urged downwardly by a leaf spring 64 .mounted at 65 .on the block 6|.. This stop finger has a downwardly Projecting portion 66 vwhich will also engage in the opening O rin the work and positively limit the forward movement of the Work as shown in Fig. 8, in which the openings are illustrative of the opening left in the stock after blanking out the workpiece. Thisstop finger 521s shaped on its under surface 61 so as to ride `along the pivot pin 54 and be lifted from the .work as vthe .carriage moves rearwardly .to take/another bite `for feeding. the work-forward. rIhus Ythestopfinger is lifted from position for a portionof the stroke of the .carriage depending on the under .shape of .the stop finger and whereby when the carriage infeeding returns to a certain Vposition the stop linger will drop .into vposition Aand limit `the movement of the work forward. YBlock 6| 4is held in position bybolt 1U passing through `itinto the die block I i. vIn some cases it is desirable to providea carriage ,for the feed .finger 51 which will .rock instead of .slide relative to the lower-die block and l I have shown in Figs. 9, 1.0 and 11 a .feed finger 5.1 which is mounted .in Va carriage 15 (see Fig. 11) whichis pivotally mounted by meansof ears 16.y This carriage also hasa roll 'H which will be engaged by the cam surface oraabutment lili to rockit .about its ,pivotal openings 'i8 vin the ears 'I6 which .are .mounted on the `pivot pin T19. They mounting block .for .the feeding finger .5.'1 is .shown .at .8.9 on -the carriage whichl pivotally mounts the finger 51 `on pin 81,.-the finger being swung downwardly by means of spring 82 snpported on rod.83 and engaging the Yfingeras at 84. In this Imanner a reciprocating motion is given to the feed'iinger 51. by .means .of..the rocking carriage while .the pivot pin 8| .serves ina similar manner to raiseandlower the stop ,finger which will be the .same .as heretofore indicated. A spring 85 will serve to return .the carriage .and cause it to follow the camas it is raised andlowered.

In some cases instead of having a cam surf-ace suchas 44 I may providea carriageof the shape shown in Fig. 12 .at .86. In thisv case wthere is a 4 downwardly extending portion or arm 8T providing a pivot 88 for the feed finger 51, the feed :linger being swung about the pivot 88 by means of spring 89 engaging the feed finger as at 90 and engaging an arm 9| of the carriage. This carriage has an arm 92 which extends outwardly in a position to be engaged by an abutment @3 carried by the upper die in an adjustable manner as at 84 so as to engage this arm and rock the carriage to reciprocate the feed finger 57".

'It will thus appear that various means may be provided for reciprocating the feed finger but that a pivot for the feed finger may in all cases serve to actuate the stop finger that the proper actuation thereof may be had.

I claim:

1. The combination with a die set having one die movable toward the other, a work feed comprising means responsive to the movement of said dies toward each other to engage the work and feed the same forwardly, stop means to engage the work and limit the forward movement of the work, said feeding means carrying a portion to engage and render inactive the stop means during a portion of the movement of said feeding means.

2. The combination with a die set having one d iemovable toward the other, a work feed comprising means on one die to engage the work and feed the same forwardly, a cam on the other die to actuate said means upon movement of said dies toward each other, stop means to engage the work and limit the forward movement of the work, said feeding means carrying a portion to engage and render inactive the stop means during a portion of the .movement of said feeding means.

3. In combination with a die set having one die movable toward the other, a work feed comprising a feed finger to engage van opening in the work, .a carriage pivotally mounting said fin ger, means responsive to the movement of the die set for moving said carriage to reciprocate said finger -to feed the work, a stop finger movably mounted on said die to engage an opening in the work and limit the forward movement thereof and means on said carriage to lift said stop finger during a portion of the movement of the carriage.

4. The combination set forth in claim 3 wherein vsaid -means for lifting the stop finger comprises a pin pivotally mounting the feed finger.

5. The combination set forth in claim 3 where in said means responsive to the movement of said dies comprises an abutment on one die to engage and move said carriage.

l6. The combination set forth in lclaim 3 wherein said means responsive to the movement of said dies comprises a cam on one die to engage and move `said carriage.

AUGUST J. ENGLAND.

REFERENCES CTIE!) The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,454,841 Allen May 15, 1923 1,968,479 Dickerman July 31, 1934 2,067,943 Nordqust Jan. 19, 1937 A2,321,788 Anderson June 15, 1943 2,369,551 Feiler Feb. 13, 1945

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