US2077407A - Metal drawing press - Google Patents

Description

p i 1937- R. w. GLAsNER METAL DRAWING PRESS 3 Sheets-Sheet 1 Filed Aug. 4, 1934 April 20, 1937. 1 R. w. GLASNER 2,077,407

METAL DRAWING PRES S Filed Aug. 4, 1954 v 3 Sheets-Sheet 3 Patented Apr. 20, 1937 UNITED STATES 2,077,401 METAL DRAWING mass Rudolph W. Glasner, Chicago, Ill., assignor to Clearing Machine Corporation, Chicago, 111., a

corporation of Illinois Application August 4, 1934, Serial No. 738,555

4 Claims.

This invention relates to improvements in metal drawing presses wherein it is desirable to provide means for arresting the movement of the slide during a portion of each cycle of operation and the elimination of costly and cumbersome parts, such as toggles, lazy links, rocker arms, etc., all of which are subject to considerable wear and resultant lost motion, which interferes with the accuracy of the operation of the press.

A further object is to provide improved means to stop the slide in its operation, and during such period of rest have the slide stand perfectly still, which heretofore has not been obtained in presses operated by toggle motion.

A further object is to provide improved and simple means for varying at will the duration of the period of dwell of the slide, which in presses which are operated by means of cams or toggle motions, cannot be varied except by substituting the operating members with other operating members.

A further object is to provide improved means to operate more than one slide in the press and to provide individual controlling means for varying the length of dwell of each slide or to operate any or all of them continuously or to operate the slides successively, simultaneously, irregularly, or in any combination.

A further object is to provide improved means in a press of this character whereby one or more of the slides may be rendered inactive while the other slide or slides remain active, the said means for this purpose being controllable at will while the parts of the press remain intact.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the fea- V tures of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention and in which Figure 1 IS a view partly in front elevation, partly in section, partly broken away, and with parts omitted, of a press of this character constructed in accordance with the principles of this invention.

Figure 2 is a vertical sectional view taken on line 2-2, Figure 1.

Figure 3 is an enlarged detail sectional View of one of the clutch mechanisms.

Figure 4 is a wiring diagram.

Figure 5 is a view partly in elevation, partly in section and partly broken away, of one of the controls for one of the clutches,

Figure 6 is an enlarged detail sectional view taken on line 6-6, Figure 5.

Referring more particularly to the drawings, the numeral l designates generally a press frame provided with a crown I and base I2, and a base crown l3.

The crowns and I3 are of a hollow construction to form a lubricant container, for the purposes to be hereinafter set forth.

The numeral l4 designates a slide to which a die is connected, and this slide moves upon vertical guides l6 supported by the press frame.

Connected to the slide M are upright members I! secured by one extremity by means of suitable fastening devices l8 to the slide. Any number of these members may be provided and as their construction and operation is the same, the specific description of one will apply equally as well to them all. The members H are of substantial length and pass through bearings l9 which are preferably connected to or supported by the crown member ll. Connected to the members I! are the ends 20 of eccentric straps 2|, which eccentric straps are of integral construction and pass around eccentrics 22 secured to gears 23, and which gears 23 are mounted upon a shaft 24. The shaft 24 passes through the crown II and is journaled in suitable bearings 25. The bearings have communication with the interior of the crown so that the lubricating material will find its way into the bearings.

The arms 20 on the eccentric straps 2| are pivotally connected as at 26 with the members I1 and the point of pivotal connection and length of the member IT is such with respect to the length of the bearing 19 that the pivot 26 will be always maintained within the confines of the outer ends of the bearing so that any stress or strain exerted upon the members I! will be resisted and the members l'l will be held against lateral movement with respect to the slide I4.

Arranged within the slide I4 is another slide 21 which has connected to it members 28, similar to the members l1, and these members 28, any number of which may be provided, pass through bearings 29, similar to the bearings l9, and which are supported preferably by the crown Mounted upon the shaft 24 and within the container or crown l l, are gears 30 between which arearranged eccentrics, around which are arranged eccentric straps SL The arms 32 of the straps are pivotally connected to the members 28, similar to the pivotal connection between the arms 20 of the eccentric 2| and the members II. The bearings 29 are of a length that the pivotal connection will be always maintained within the confines of the outer end of the bearings.

The outer slide M is reciprocated by means of a shaft 33 arranged within the crown or container and which is journaled in suitable bearings and also passes through a partition 34, which forms a bearing. Secured to the shaft 33 are gears 35 which respectively mesh with the gears 23, and secured also to the shaft 33 is a drivin gear 36.

Another shaft 37? is journaled in suitable bearings 33 and also passes through the partition 33, and has secured to it gears 39 which respectively mesh with the gears 33 for rotating them, and

, connected also to the shaft Sill is a driving gear All Thus, it will be seen that when the respective shafts 33 and 3? are rotated, the inner and outer slides l6 and 217 will be correspondingly rotated.

The driving gears 43 and 35 are rotated from any suitable source of power, such as by means of a belt H which passes over a pulley 32 connected to one of the shafts 37d, and which pulley constitutes a portion of a clutch device.

The gears 53 mesh with each other so as to transmit motion from the drive shaft to the other side of the slide where there is a similar drive connection.

Mounted upon one or the shafts 3l-33 are clutch devices and as the construction and operation of all of the clutch devices is the same, the description of one will apply equally as Well to the other, with the exception that one of the clutch elements constitutes a pulley or drive connection, whereas the other clutch devices are not driven in the same manner.

The clutch element 33 (see particularly Figure 3) is secured to the shaft 33 for rotation therewith and is preferably connected to the shaft by means of a key connection id adapting the element to be moved lengthwise of the axis of the shaft. A spring 35 operates upon the clutch element and tends normally to move it in one di rection with respect to the co-operating clutch element 46.

A magnet or electro-responsive device ll is provided for operating the clutch element 43, and cooperating with the magnet is an armature or solenoid 48 having connection by means of a suitable yoke 49 with the clutch element. When the magnet 41 is energized, the clutch element 43 will be moved against the stress of the spring 45 to effect an operative connection between the clutch element 43 and the shaft 33 so as to cause the clutch element 46 to be rotated with the shaft. When the magnet 41 is de-energized, the spring 45 will move the clutch element43 into an inactive position with respect to the element 46, and the shaft 33 will then be adapted to rotate independently with respect to the clutch element 46.

Connected with the clutch element 46 for rotation therewith, are gears 49, 50, 5|, and over the gear 49 a sprocket chain 52 passes, and this sprocket chain also passes over a sprocket wheel 53, which is connected with the clutch element 54 mounted upon the shaft 31, so that when the gear 40 is rotated, the clutch element 54 which is connected with the gear 40 for rotation therewith, will transmit its motion through the sprocket chain 52 to the clutch element 46 which rotates freely upon the shaft 33. The gears 40 and 36 are mounted loosely upon the shafts 31 and 33, and continuously rotate the clutch elements 54 and 46, but when these elements 54 and 46 are locked with the respective shafts 31 and 33 by the operation of the control device 41, the shafts 31 and 33 will be rotated to reciprocate the respective slides. It will therefore be manifest that by controlling the control devices 31, either one or both of the clutch devices may be rendered active to rotate the respective shafts 3'4 and 33 or one or both of them may be rendered inactive.

Disposed beneath the bed l2 of the press so as to operate on the other side of the work is another slide 55 which carries a'die 58 that co-operates with the dies carried by the slide 21. This slide 55 is reciprocated in a manner similar to the upper slides, and to that end there is provided within the container I3 at the bottom of the press, spaced gears 51 which are secured to a shaft 53 for rotation therewith, and which shaft is mounted in bearings 59. Secured to the shaft 53 are eccentrics 6i] encompassed by eccentric straps 6 l, the arms 62 of which are pivotally connected to members 83 arranged perpendicular to and secured to the slide 55. These members 63 move'in bearings 34 preferably supported by the lower crown, and the bearings 66 are of such a length with respect to the pointof pivotal connection between the arms 52 and the members 63 and the movement of the pivotal connection that such connection will be always maintained within the confines of the outer end of the bearing 6 so that all lateral stress or strains exerted upon the members 63 will not only maintain them against lateral movement but the slide 55 will be maintained against edgewise and tilting movement.

Meshing with the gears 51 are pinion gears 65 which are secured to a shaft 66 mounted in bear- I ings 6? and also a bearing 68 in a partition 69.

All of these parts are located within the lower crown l3. Secured to each of the shafts 66 are gears 10 which mesh with each other so as to operate both sides of the slide in unison. Connected also to the shafts 66 are pinion gears 1| which mesh with the gears 51 for rotating the latter. A clutch device 12, similar in construction to the clutch device illustrated in Figure 3, is mounted upon one of the shafts 66 for rendering the clutch active and inactive.

Secured to the freely rotatable element of the clutch device 12 is a sprocket wheel, over which a sprocket chain 13 passes, and this sprocket chain also passes over the sprocket wheel 50 which is secured to the clutch element 46 that is loosely mounted upon one of the shafts 33, so that motion from the drive pulley 42 will rotate the freely rotatable clutch element on one of the shafts 31, and this in turn will rotate the freely rotatable clutch element on one of the shafts 33, such motion being transmitted through the sprocket chain 13 to the freely rotatable clutch element of the clutch 12 on one of the shafts 66. I A similar control, here shown as an electroresponsive device 41, is provided for rendering the clutch device 12 active and inactive.

It will therefore be manifest that in order to selectively control the operation of the slides 21, I4 and 55, it is only necessary to selectively control the clutch devices on the respective operating shafts for the slides.

Any suitable means may be provided for that purpose, but in the present exemplification of the invention there is provided a circuit control box indicated diagrammatically at 14, to which current is supplied by the feed lines 15-16. This box may be of any desired construction and is provided with circuit control devices 11, 18 and 19, one to control the clutch for the outer slide, designated 0 in Figure 4, one to control the clutch for the inner slide, designated by the letter I in Figure 4, and one to control the clutch for the lower slide, designated by the letter L in Figure 4.

The numeral 80 in Figure 4, indicates diagrammatically a motor for controlling the operation of the press and which is connected to the feed lines by means of the conductors 8I and 82, a switch or cut out device 83 being provided in one of the connections for the purpose of rendering the'motor active or inactive at will.

Secured to a shaft 84, which is mounted preferably in hearings in. a bracket 85, are discs or rotatable elements 86, 81 and 88, one for each of the control devices, and as the. construction and operation of each of these devices 86, 81 and ,channels and are provided with extensions 92 which are preferably threaded. These extensions each pass through a finger 93 preferably provided with a pointed end 94, and a fastening nut or collar 95 is threaded upon the portion 92 so as to clamp the finger 93 as well as the slide 92 in position. The finger 93 is adapted to be moved-from the position shown in full lines to the position shown in dotted lines in Figure 5, by loosening the nut or collar 95.

With this arrangement it will be manifest that when the fingers are moved to the position shown in full lines .in Figure 5, and secured in that position, they will be in an active position to project beyond the periphery of the element 86, but when it is desired to render the fingers inactive, the fastening nut 95 is loosened and the finger 93 turned to the dotted line position and then secured in this position.

Co-operating with the respective elements 86, 81 and 88 are tappet wheels 91 rotatably supported by shafts 98 iournaled in suitable bearings 99. One of these tappet wheels 91 is provided for each of the elements 86, 81 and 88, and

also with fingers 93 arranged on opposite faces of the respective elements 86, 81 and 88. When these tappet wheels 91 are rotated by engagement of the tappets or fingers 93 a step by step motion will be imparted to the elements 91, and the rotation of these elements will cause the switches (not shown) to be actuated to establish or interrupt the circuit or current through the switch box to the respective electro-responsive devices 12. This operation will be caused by the fingers on one face of the elements 86, 81 and} 88, and the elements 91 will be operated by the fingers on the other face of such elements to reestablish or interrupt the circuit through the electro-responsive devices, so that during the operation of, the elements 86, 81 and 88, one set of fingers will open the circuit and one set of fingers will close it.

Obviously, therefore, by arranging the tappets or fingers 93 with respect to each other, the cir- .cuits through the various electro-responsive devices may be readily controlled.

It will also be manifest that by setting these fingers 93, the slides 21, I4 and 55 may be controlled in their operation so as to render any one or more of the slides inactive, to cause them to operate upon the work simultaneously, to cause them to operate upon the work successively, or some of the slides may be rendered active while others remain inactive, all according to a predetermined selection by the operator.

Any suitable means may be provided for rotatefficient means embodies a sprocket chain I09 I (see Figure 1) which passes over a sprocket wheel IOI on the shaft 84 and also over a sprocket I02 connected to the shaft I83 of a speed reducing mechanism indicated diagrammatically by the reference numeral I04. Another sprocket I constitutes a portion of a speed reducing mechanism (not shown but which may be of the ordinary and well known. construction), and over this sprocket I95 a sprocket chain I96 passes. This sprocket chain I96 also passes over a sprocket wheel I01 that is secured to one of the shafts 33, so that when the shaft 33 is rotated, motion will be imparted to the sprocket chain II to rotate the shaft 84 and with it the elements 86, 81 and 88.

It is thought that the operation of this device will be clearly understood from the foregoing,

but briefly stated, it is as follows. The respective slides I4, 21 and 55 are actuated by means of their respective operating mechanisms and the operation of the actuating mechanisms is controlled by the respective clutch devices so that by controlling the clutch devices it will be possible to control or selectively render active or inactive predetermined ones of the slides, thereby placing in the control of the operator 9. means whereby any one or more of the slides may be rendered inactive, and as before stated, the slides may be caused to operate either simultaneously upon the work, on opposite. sides thereof, successively, or some of the slides may be rendered active and inactive, and the relative operation of the slides upon the work with respect to each other may also-be controlled or varied. At the same time the period of dwell of the dies upon the work may be controlled or varied, and the length or period of dwell of the dies carried by the respective slides upon the work and with relation to each other may also be varied. This is accomplished by setting the fingers or tappets 93 upon the respective elements 86, 81, 88, according to the desire of the operatorand of the work to be performed.

The mechanism, after the fingers or tappets 'have been set, is automatic in operation and the and the switch 83 closed, the current will flow through the respective electro-responsive devices 0, I and L in Figure 4. For controlling the outer slide, the current will flow from the conductor 15, through the conductor device 0, conductor I09, switch device 11, conductor III, back to the conductor 16. Similarly, when the inner slide is to be rendered active, current will fiow from the conductor 15, through the conductor II2, electro-responsive device I, conductor II3, through the switch box 18, out of the switch through the conductor II5, back to the conductor 16, and likewise, when the lower slide is to be rendered active, the current will flow from the conductor 15, through the conductor II 6, electro-responsive device L, conductor I I1, switch box 19, out through the conductor II9, back to the conductor 16. l Thus, it will be manifest that the current ma be caused to flow through either one or more of the electro-responsive devices 0, I and L, and

I88, electro-responsive' by the control or fiow of the current through these devices the operation of the respective slides i l, 27 and 55 may be correspondingly controlled. Inasmuch as the operating mechanisms for the upper slides are disposed within the upper crown and the operating mechanism for the lower slide is disposed within the lower crown, and as these crowns constitute lubricant receptacles, the operating mechanisms will be immersed and/or submerged in the lubricant, thereby obviating the necessity of providing separate lubricating ducts or channels leading to the respective parts of the operating mechanisms.

It will therefore be manifest that with the present invention each of the work forming or shaping slides is adapted to be controlled in its operation independently with respect to the operation of the others. It will also be manifest that there is provided controlling means with mechanismadapted to be set so as to cause the operation of the slides to be varied with respect to each other at will. This will render it possible for the operator to-cause any two or more of the slides to operate simultaneously or independently with respect to each other, and it is also possible to selectively control the operation of each slide so that the period of dwell or the time of operation with respect to the other slides may be altered or varied so that the operator may have absolute control of the operation of these slides.

It is even possible in the present invention to keep one or more of the slides inactive while the other slides remain active, without the necessity of changing any of the mechanisms of the press or dismantling any of the parts. The structure as disclosed in this application permits adjustments by the operator for the action or inaction of any of the slides, at will, selectively, individually or simultaneously.

While the preferred form of the invention has been herein shown and described, it is to 'be understood that various changes may be made in the details of construction and in the com bination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as'new is:

1. In a metal drawing press, a plurality of slides operating separately upon the work, actuating means individual to the slides, a source of power, operative connections between the said source of power and each of said actuating means, said connections embodying clutch devices individual to the slides, means individual to the clutch devices for controlling them, the last said means including electro-responsive devices individual to each of the clutches, switch devices individual to the said electro-responsive devices for causing the latter to become energized and de-energized, rotatable elements individual to the switch devices, power means common to said elements for rotating them, and means adjustably connected to each of the said elements and coacting with the respective said switch devices for selectively rendering the clutch devices active and inactive at predetermined times in the cycle of operation of the press to cause the slides to operate in any order or sequence.

2. In a metal drawing press, a plurality of slides operating separately upon the work, actuating means individual to the slides, a source of power, operative connections between the said source of power and each of said actuating means, said connections embodying clutch devices individual to the slides, means individual to the clutch devices for controlling them, the last said means including electro-responsive devices individual to each of the clutches, switch devices individual to the said electro-responsive devices for causing the latter to become energized and de-energized, rotatable elements individual to the switch devices, fingers adjus'tably connected to each of the said elements and coacting with the respective said switch devices for selectively rendering the clutch devices active and inactive at predetermined times in the cycle of operation of the press to cause the slides to operate in any order or sequence, and an operative connection between said rotatable elements and said source of power.

3. In a metal drawing press, a plurality of slides bodying clutch devices, means individual to the clutch devices for controlling them, the last said means including electro-responsive devices individual to each of the clutches, switch devices individual to the said electro-responsive devices for controlling the latter, rotatable elements individual to the switch devices, an operative connection between said source of power and said elements for rotating them, and a finger connected to each of said elements and coacting with the respective said switch devices for selectively opcrating the switch devices for rendering the clutch devices active and inactive at predetermined times in the cycle of operation of the press to cause the slides to operate in any order or sequence, said fingers being adjustable in one direction with respect to the respective elements to vary in the cycle of operation of the press the time of operation of the fingers on the switches, said fingers being adjustable in another direction with respect to the elements to render said fingers active and inactive with respect to the switch devices.

4. In a metal drawing press, a plurality of slides operating separately upon the work, actuating means individual to the slides, a source of power, clutch devices individual to and disposed between the source. of power and the respective slide actuating means, electro-responsive devices individual to and disposed in close proximity to the clutch devices for actuating them, switch devices individual to and remote from, but connected to the electro-responsive devices for controlling the latter, said switch devices disposed in close proximity to each other, a rotatable element adjacent each switch device, means operatively connecting said elements for rotation together,

means for driving said elements from said source of power, members carried by the respective rotatable elements for engaging and operating the respective switch devices, and means adjustably connecting said members to said rotatable elements, whereby said members may be positioned to be active or inactive with relation to the respective switch devices during the rotation of said elements.

RUDOLPH W. GLASN'ER.

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