US736433A - Drawing-press. - Google Patents

Description

No. 736,433. PATENTED AUG.18, 1903.

I. 0. B. PAGE.

- DRAWING PRESS.

APPLICATION FILED JULY 3, 1902.

H0 MODEL. 2 SHEETS-$111131 1.

FIG. 2.

INVENTOR:

WITNESSES; 21 l-$43.

By At/ameys,

No. 736,433. PATENTED AUG. 18, 1903.

F.C.B.PAGE.

DRAWING PRESS.

APPLIOATION FILED JULY 3,1902.

N0 MODEL. 2 SHEETS-SHEET Z.

A I j INVENTOR; WITNESSES: Z fiwam v By At/omeys,

maw nsc Nita STATES Patented August 18, 1903.

FRANK C. .3. ZFAGE, OF BROOKLYN, NEW YORK, ASSIGNOR TO E. W. BLISS COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF VEST VIRGINIA.

DRAWING-PRESS.

SPECIFICATION forming part of Letters Patent No. 736,433, dated August 18, 1903. Application filed July 3, 1902. Serial No. 114,304. (No model.)

To all whom it may concern:

Be it known that I, FRANK 0. B. PAGE, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Drawing-Presses, of which the following is aspecification.

This invention relates to drawing-presses for drawing sheet metal or metal plates into cup-shaped articles. Such presses require an annular blank-holder for pinching the rim portion of the'blank with a suitable graduated pressure and a. punch or male die movable through the blank-holder for forcing the central portion of the blank into cup shape and drawing the metal between the blank-holding surfaces. In the American type of such presses the bed or lower die is stationary and the upper blank holding member descends from above it, the punch also descending from above through the blank-holder and the female die. In the German type of such presses the upper blankholding member is stationary and the lower blank-holding member or die is mounted upon a bed which moves up from beneath to clamp the blank, the punch. moving down from above through the blank-holder and into the die to draw the blank. Ordinarily toggles are used for operating the movable blank-holding member, and the punch is driven from a crank so as to perform one drawing operation at each revolution, the blank being clamped in the blank-holder at about the beginning of the downstroke of the punch and being released immediately after the crank passes its lower dead-center, whereupon the movable blank-holding member separates from the stationary member to enable a new blank to be placed in position to be drawn. In the American typeof press the die being stationary it is easy to place a blank thereon. In the German type of press the die being the movable member it is requisite that it be held stationary,or substantiallyso, for a sufficient time to enablethe blank to be properly placed in position. In the German type of-"press, therefore, it is usual to move the die intermittently, holding in its extreme positions.

it stationary in its extreme upper and lower positions during about one hundred and twenty degrees of the crank movement-and moving it up or down during about sixty de grees of such movement.

. This invention provides an improved mech anism for obtaining such an intermittent movement of the die or other movable blankholding member from the continuously-rotating crank-shaft, which mechanism is sim* ple and compact and secures the necessary long stroke by means of devices which are not seriously affected by the ordinary wear which they sustain. Theimovable bed may receive its up-and-down movements immediately from the usual compound toggle-joint mechanism or from any other suitable mechanism. For driving such mechanism from the continuously-rotating main shaft I interpose .a rotatable member operatively connected to the bedas, for example, through the intermediation of such compound togglejoint mechanism-and I employ means for transmitting the movement of the shaft intermittently to such rotatable member whereby the bed is moved and is caused to dwell The means for transmitting the movement of the shaft intermittently to the rotatable member may, for example, be almost any one of the many pin-and-slot transmitting devices known or any variation of the known forms.

Referring to the accompanying drawings, illustrating embodiments'of the invention, Figure 1 is a side elevation of a complete press. Fig. 2 is a front elevation thereof, the blank-holding dies being shown in section. Fig. 3 is a'section on the line 3 3, Fig. 4, of another press embodying the invention. Fig. 4 is a front elevation thereof similar to Fig. 2. The frame A of my improved press may consist, as shown, of two upright side frames connected together at top and bottom and.

having" a stationary cross-head B fixed in place between them. 7 A verticallym0'vable slide or plunger 0 is mounted to move through the open orhollow central portion of the cross-head B. A lower cross-pieceD, constituting a movable bed or platen, is mounted to move vertically between the side frames,

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being guided by any suitable siid'ewsys. lhe crosspieces E and D carry, respectiveiy, the clamping members E cod E, which together consritute she hisoicholder. A QJfliill G is fastened beneath the plunger G and works through the hleok-hoidiog members '53 end F, the letter of which cousLii-otes, usual, the female die. The plunger W its punch. G, may be moved any mechanism known in the art or appliceole to this purpose, being shown so operated. by e crank on rosin shaft H, the plunger being connected to the crack by s suitable cono'ectiog-rofi or pibmou jointed at their upper ends to the and as their lower ends to ioggle 'ms K K, projeoir iog from sheiis L L, which eiisffis have hearings in the side frames, end. at one side of the machine these sheiifls extend through the side frames and have ioggleerms L, which. arms are joiuted to toggle-hose M M, which is turn are jointed to verticallymoving slide P, which is guided or: slideweys P. In the positions shown ill the drawings the bed is in its lowest posi'iiiou, is iiolis M being approximately verriceisod she iiogg'ic jioiois .5 lil folded iogeiher or co .d. As the slide P is pushed upvverdig l. or doivifo wardly in Fig. 3 is commumcsies e ve'riicel thrust, iih rougrh the links li to the arms L L" and through the shafts L to she arms KK to swing the letter upward until reach an approximately verticsi position, on upward thrust being communicated from-them through the toggle-links J J to the bed For imparting motion to the slide P or Oiihfil' bed-operating mechanism 1 provide s, suitable device between the crank H and she slide I, which shall be intermittently operated by the rotation of the crank-s eff endshail iotermittently raise and lower the slide P. The construction shown in Fig, l for this purpose comprises a slotted disk Q, operated by means of pins R, carried on 2*. double oreoiiS the shaft. H, which disk Q in turn opera-mes oi crank T, which is connected by a. pitmen U to the slide P. The disk Q; is provided with concave locking-faces V, which. engage with convex locking-faces W 011 s, suil'eoie disk X, carried. on the shaft H, the disk being re cessed at suim'ole poiuii's to perooiithe rose-- iiou of the dis Q, when the pin R is-iu erigagement with 2i slot of the letter disk. PM lasting with the disi:- Q on the some stud is s. toothed gear Y, which engages s pinion vessels complete movement of the punch.

The operation is as follows: Starting from the position showusnd in which the punchSo is at its highest point, the movement of the main shaft; first; transmits to the disk Q a scarier of a, revolution, which brings the .olr T and. the slide P sod bed D to their highest posit-ion. At about the end of this movement the punch has moved down sufiicieuviy to engage the some and commence the drawing operation. The couvex'edge W of the disk X then enters the coocsve edge V f the disk Q and holds the iatter and the bed D sisetiouery in its extreme ugsper position to cause a. long dweli in this giosirioh. The opposite pin R then engages the next sioi, in she disk Q and produces suoiher quenter'-evolutiou, which depresses'iuhe crank T to its lGWGS B'pQSliLiOH and also the slide P and lied D. Then follows a dwell, while the opposits convex edge W of the disk X locks the disk Q. At about the momens of beginning the downward movement of the bed D the punch G commences to rise, and when the bed D is in its lowest; position it is clear ofthe punch, so as to permit of the feeding of s new blank.

Instead of using as completely rotstive disk Q, es in Fig. l, i may use a. partially robstive oroscillstiug dish Q5, Fig. 3, sud I may attach e crank-pin Ci" directly to this disk, which connects, by mes-no of a pibmsu U, with the slide P. The disk Q,- in this case is shown as provided with a, pair of slots q q, adopted for engagement with pins R R, carried, respectively, upon gears a a in mesh with each other and. driven from the main shaft H, as by mounting the gear a directly upon the shaft H. Nibhihis mechanism, starting from the position shown, the pin R engages the slot q and turns the disk a quarter of a. revolution, throwing the slide P downward and the bed D upward. The punch simultaneously commences its downward movement and engages the blanket; about the completion of the upward. movementof the bed, caused by the disengagement of the pin R from the slot; g, which permits the'disk Q"to remaiuat rest. There is iihen a dwell of the bed, while the punch continues ins downward movement to draw the blank. At the end of the dwell the pin.

B engages the'sloi; g (which was turned to proper position for such engagement by the previous movement) and turns the disk back to its original position, lifting the slide Pand lowering the bed D to its extreme lower-posi- IGQ tion. Upon disengagement of the pin R from the slot q the disk Q again has a period of rest, and another dwell follows, during which the punch completes its upward movement, and the cycle of operations commences again.

For holding the disk Q in the positions to which it is moved any suitable locking means may be used-such, for example,as the springbolt 1), suitably mounted on the frame of the machine and entering notches c in the disk. The disk is released at the moment when one of the pins R R enters its slot by the engagement of the other of said pins with an arm of the double cam d, so as to withdraw the bolt from the notch of the disk.

Though I have described with great particularity of detail apparatus embodying my invention, yet it is to be understood that the invention is not limited to the particular apparatus disclosed. Various modifications thereof in detail and in the combination and arrangement of the parts are possible to those skilled in the art without departure from the invention.

What I claim, therefore, is-

1. In adrawing-press, the combination with a fixed upper and a moving lower blank-holding member, and a bed carrying the latter, of a continuously-rotating shaft, a rotatable member, means for transmitting the move ments of said shaft intermittently to said rotatable member, a toggle mechanism for raising and lowering said bed, and an operative connection between said mechanism and said intermittently-moving member, whereby the intermittent movements thereof cause the bed to dwell in its lower or inactive position after each stroke.

2. In a drawing-press, the combination with a fixed upper and a moving lower blank-holding member, and a bed carrying the latter, of a continuously-rotating shaft, a rotatable member, means for transmitting the movements of said shaft intermittently to said rotatable member, a reciprocating slide connected to said rotatable member, and a toggle mechanism connected to said slide and adapted to raise and lower said bed, whereby the intermittent movements of said rotatable member cause the bed to dwell in its lower or inactive position after each stroke.

In a drawing-press, the combination with a fixed upper and a moving lower blank-holding member, and a bed carrying the latter,

of a continuously-rotating shaft, a rotatable member, a pin-and-slot mechanism for transmitting the movements of said shaft intermittently to said rotatable member, a reciprocating slide connected to said rotatable member, and a toggle mechanism connected to said slide and adapted to raise and lower said bed, whereby the intermittent movements of said rotatable member cause the bed to dwell in its lower or inactive position after each stroke.

4-. In a drawing-press, the combination with a fixed upper and a moving lower blank-holding membeigand a bed carrying the latter', of a continuously-rotating shaft,a rotatable member, means for transmitting the movements of said shaft intermittently to said rotatable member, a crank driven by said member, a reciprocating slide operated by said crank, and a toggle connected between said slide and bed whereby the intermittent movements of said rotatable member cause the bed to dwell in its lower or inactive position after each stroke.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

FRANK o. PAGE.

\Vitnesses:

()TTO S. BEYER, FRED. ll. MCGABIE.

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