US1423617A - Press - Google Patents

Description

W. KLOCKE.

PRESS;

APPLICATION FILED MAY 15, 1920.

Patented July 25, 1922.

2 SHEETSSHEET 1.

INVENTOR W. KLOCKE.

\ PRESS: APPLICATION FILED MAY 15, 1920.

1 A2 3, 6 l a Patented July 25, 1922.

Z SHEETSSHEET 2.

Fig 2.

l J 90 INVENTOR 29 Pin 29 WILLIAM KLOCKE, 0F WOODHAVEN, NEW YORK, ASSIGNOR TO E. W. BLISS COMPANY.

. OF BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

essrs.

Application filed May 15,

T 0 all whom it may concern:

Be it known that 1, WILLIAM KLOCKE, a citizen of the United States of America, residing in Woodhaven, in the borough and county of Queens, city and State of New York, have invented certain new and useful Improvements in Press es, of which the following is a specification.

This invention relates to presses, and aims to provide improvements therein.

' The present invention provides a press wherein the punch slide is driven with a uniform motion upon its working stroke and has definite limits as to the extremes of its working stroke, whereby the press may be employed to advantagein making long draws upon a blank or shell, such as is customary in drawing deep shells. The invent-ion further enables sheets or shells to be drawn of a definite depth and with a flange at its upper end. The invention may further provide for a quick return of the punch slide on its upstroke.

The press or presses of the present invention may include the punch slide actuating combination, in combination, or not, as may be desired, with other parts or mechanism of a press, as for instance the blank-holder and its actuating mechanism, herein set forth.

An embodiment of the invention is illustrated in the accompanying drawings. In said drawings,-

Figure 1 is an end-view of a press embodying the'present invention, and

Fig. 2 is a side view of the construction shown in Fig. 1, certain parts thereof being shown in section. v

Fig. 3 is a diagrammatic view illustrating certain of the parts of the crank shaft actuatin mechanism in a plurality of positions. Fig. 4 illustrates, by means of a curve, the movement and motion of the punch, slide 10, and also shows, by means of dots, corre sponding positions of the pin 29 and crank 13.

Referring to said drawings, numeral 10 I designates a punch slide connected, in a suit able manner, to a crank shaft 12; 14 designates the bed of the press and 16 the slide which ordinarily carries a blank holder or die, in accordance with the design of the press, the slide here being shown as a blank holder slide, the die 18 being carried upon the bed 14.

Specification of Letters Patent.

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The crank connection of the punch slide 10 to the crank shaft 12 definitely limits the throw of the punch slide upon its forward and return movements, and consequently definitely limits the throw of the punch on the working stroke.

Suitable means 20 are provided for driv ing the crank shaft 12 in such manner that the punch slide 10 has a uniform movement .upon its working stroke. These means conveniently comprise a driving part, such as a gear or pulley, here shown as a gear 22 mounted to turn on a hub 23 on the frame of the press. The crank shaft 12 is so located that it passes eccentrically through the hub 23 and is hence eccentric to the center of rotation of the driving part 22. The crank shaft 12 is connected to the driving part 22 conveniently through an arm 25 fixed upon,

the crank shaft 12 and a link 27 attached at one end to the arm. 25, and at its other end to a crank pin, or equivalent, 29 upon the driving part 22. The driving part 22 hence acts to turn the crank shaft 12 through the connecting parts 25 and 27. The blank holder slide actuating mechanism, which may be of any suitable type, is-conveniently connected to a pin 31 (or the equivalent) adapted to be seated in the socket 32 formed upon the arm 25 attached to the crank shaft 1 Patent N o. 1,411,036,and said mechanism is claimed in said application. The mechanism conveniently comprises a guide link 40, a rock-shaft 42 and a pair-of toggles 44, 45, connected respectively to the slide 16, and to the guide link 40. 47 is a connecting rod or link connected at one end to the crankpin 31 and at its other end to the toggle 45. The function of this mechanism is to provide a dwell of considerable duration of the slide 16 in the blank holding position, as set forth at length in the aforesaid Klocke and Dobson application.

Operation: Referring to Fig. 3, the crank 13 on the crankshaft 12 is shown in full lines as at the top of the up stroke, and the punch slide 10 is consequently at the limit of its up stroke and about to begin its working stroke. As the point of connection 29 on the driving part 22 turns through the succeeding 225 of movement, it will be seen that during the first 45 of movement of 7 part of its movement which is ordinarily slow and hence the net result of the action of the connecting parts 25, 27 will be to move the crank relatively uniformly fast from its'90 position to about its 135 position. During the next of movement of the point 29, (from 135 to 180) there will be abending toward one another of the connecting parts 25, 27 and hence there will be a relative loss of motion between the'point 29 and the crank 13. Inasmuch, however, as the crank 13 will be moving through that part of its movement which commumcates a relatively fast motion to the punch slide 10,

the action of the connectin parts 25, 27 will be to slow the movement 0 the crank so that the movement of the punch slide from its 135 to 180 position will be at approximately the same rate as from its 90 position to its 135 position. The movement of the punch slide 10 will, therefore, be uniform, or substantially uniform from the 90 position of the crank 13 to substantially the 180 position.

Through the next 45 of movement of the A point 29 on the driving part 22, the connecting parts 25, 27 Wlll bend further toward one another, and as the crank 13 is moving from approximately its 180 position to its 225 position, the movement of the punch slide will be slowed. The movement of the punch slide will, therefore, be

substantially at the same rate as from the 90 position of the crank to the 180 position thereof. Consequently, the movement of the punch slide will be substantially uni form from its 90 position to approximately its 125 position.

Through the next 45 of movement of the point 29, which brings the parts to the position shown in dotted lines, Fig. 3,- corresponding to the limit of the working stroke of the punch slide 10 the connecting parts 25,.27 bend toward one another, so that the action of the said connecting parts upon the crank 13 is to continue the movement of the punch slide 10 at the same rate as from its movement from its 90'position to its 225 position, and to show the movement of said punch as the crank 13 reaches its 270 position and the slide 10 reaches the end of its working stroke. Therefore, the punch slide moves very slowly atthe end of the stroke,

of the parts shown in ful lines, there will be a bending away from one another of the connecting parts 25, 27, which will produce a comparatively rapid upstroke of the unch slide. The movement of the punch slide 10 on its upstroke (corresponding to 180 of movement of the crank 13) will, therefore, all take place while the point 29 is moving through a total of 135. It will be seen from the fore oing (and from Fig. 4:) that the punch sli e is moved at a substantially uniform speed throughout its working stroke, the motion being slowed or eased at the ends of thestroke. The various positions of the crank 13 and punch slide 10,

corresponding to movement of the pin 29 through one cycle, and plottedat positions 45 apart, is shown by the dots in Figs. 3 and 4. a Y I As the blank-holder (carried by theslide 16) will hold the blank during the time that the punch (carried by the slide 16) is upon a greater or less part of its working stroke (according to deslgn) the rate of the drawing action of the unch u on the 'work held by the blank-hol er, wil be substantially uniform. With the resent ress, it will be possible to draw s 811501 lanks which are ordinarily drawn upon hydraulic or gear actuated punches, which work cannot ordinarily be performed upon presses with the ordinary crank-driven unch'es.

While the unch-sli e actuating mechanism of the invention has been shown as embodied in a press with a blank-holder, it may, nevertheless be used in presses without blank-holders.

The invention may receive other embodiments than that herein specifically illustrated and described. 7

'What is claimed is 1. A press comprising a punch, a die, means for driving said. punch with. a uniform motion on its working stroke, said means comprising a part to which said punch is connected, having a crank motion, whereby said punch has definite limits to the ex.- tremes of its movement.

2. A press comprising a punch, and a die,

ing part, and connections between said crank-shaft and driving part, adapted to impart a uniform movement to said punch on its working stroke.

3. A press comprising a punch and a die, a crank-shaft .for drivin said punch, and means for driving said crankshaft, said punch is an easy movement. Moreover, it i means comprising a uniformly moving driving part and connections between said crankshaft and driving part, adapted to impart a uniform movement to said punch on its working stroke, said working stroke being of longer duration than the'return stroke.

4. A press comprising a punchand a die,

,and a link connecting said arm and driving part.

5. A press comprising a punch and a die, a crankshaftfor driving said punch, and means for driving said crankshaft, said means comprising a uniformly moving driving part and connections between said crankshaft and driving part, adapted to impart a uniform movement to said punch on its working stroke, said crank-shaft being eccen- 1 ing part and connections between said crankshaft and driving part, adapted to impart a uniform movement to said punch on its working stroke, said crankshaft-being eccentric of said driving part, and said connections comprising an arm on said crank shaft and a'link connecting said arm and driving part, said arm being substantially at right angles to said crank on said crankshaft.

7. A press comprising a punch and a. die, a crank-shaft for driving said punch, and means for driving said crank-shaft, said means comprising a uniformly moving driving partand connections between said crankshaft and driving part, adapted to impart a uniform movement to said punch on its working stroke, said crank-shaft being eccentric ofsaid driving part, and said con- 'IIBCtlOIlS comprising an arm on said-crankshaft and a link connecting said arm and driving part, said arm being substantially at right angles to said crank on said crankshaft, and said link having its point of attachment to said driving part substantially in line with said crank when said crank is at a position at one extreme of its throw.

8. A press comprising a punch and a die, a crank-shaft for driving said punch, and means for driving said crank-shaft, said means comprising a uniformly moving driving part and connections between said crankshaft and driving part, adapted to impart a uniform movement to said punch on its working stroke, said crank-shaft being eccentric of said driving part, and said connections comprising an arm on said crankshaft and a link connecting said arm and driving part, said arm having thereon means forconnecting a blank-holder or die carryin slide connecting rod thereto n "witness whereof, I have hereunto signed my name.

-WILLIAM KLOGKE.

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