US2518086A

US2518086A - Work holder for forging machines

Info

Publication number: US2518086A
Application number: US13155A
Authority: US
Inventors: Stanley J Snorek
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1948-03-05
Filing date: 1948-03-05
Publication date: 1950-08-08
Anticipated expiration: 1967-08-08

Description

Aug. 8, 1950 5, SNQREK v 2,518,086

WORK HOLDER FOR FORGING MACHINES Filed March 5, 1948 3 Sheets-Sheet 1 FIG.-

FIG. 2

Aug. 8, 1950 s. J. SNOREK 2,518,086

WORK HOLDER FOR FORGING MACHINES Filed March 5, 1948 3 Sheets-Sheet 2 dnimirmlh ATTORNFY .9650 CONT/Pat 3 Sheets-Sheet 5 con/m0: I400! 815 E DER IVAL W SPEED S. J. SNOREK WORK HOLDER FOR FORGING MACHINES LVE mu mu: 75

vnz v:

HIGH FIFESSl/Rt' Aug. 8; 1950 Filed March 5, 1948 avvavfan 5'. JS/VO/PEK er rron/v47 Patented Aug. 8, 1950 WORKJHOLDER. FOR FORGING MACHINES Stanley J. Snorek, Berwyn, Ill., assignor to Western Electric Company, Incorporated, a corporation of New York Application March 5, 1948, Serial No. 13,155

I 3 Claims.

This invention relates to apparatus for forming indentations in articles and more particularly to an apparatus for pressing pairs of opposed conical shaped recesses of the same size in opposite sides of relay armatures.

Anobject of the present invention'is to provide a simple and effective apparatus for forming indentations in an article.

In one embodiment of the invention, there is provided a support for supporting an article between a pairof opposed tools mounted for reciprocation on opposite sides of the support and positively actuated in opposite directions by fluid actuators operated under control of suitable control mechanism. The article is positioned on the horizontal surface of the support with one edge in engagement with a, stationary jaw on the support and is clamped against the stationary jaw by a horizontally movable clamping jaw yieldably mounted for movement on a plunger moved under the influence of a third fluid actuator. The third fluid actuator, in response to the admission of fluid pressure therein under control of a pair of manually operated valves, advances theplunger and the movablevjawto effect the clamping of the article against the stationary jaw, and the end of the plunger, as it is moved forward, actuates a bell crank clamping member to clamp the article vertically against the horizontal surface of the support. A microswitch, operated in response to the forward movement of the plunger, actuates the control mechanism to admit fluid under low pressure to the tool actuators to cause the forward movement of the tools into engagement with the opposite.

surfaces of the article, after which a foot valve may be actuated to admit fluid under high pressure to the tool actuators tocause the tools to be further advanced to press identical lndenta- I tions in opposite sides of the article.

The invention will be more fully understood by the followingdetailed description thereof and the accompanying drawings illustrating a preferred embodiment of the invention in which Fig. 1 is a plan view of a portion of. the appas ratus;

Fig. 2 is an enlarged vertical lateral sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged fragmentary plan view showing the article in posiiton in the apparatus and parts of the apparatus acting thereon; 7

Fig.4 is a central longitudinal vertical sectional view of the apparatus taken on the line 4-4 of Fig. 1 and showing the parts -of the apparatus in normal inoperative position;

plate I! of the apparatus. transversely extending shoulder or jaw I8 is Fig. 5 is a view similar to Fig. 4 showing an article. clamped in position thereon;

Fig. 6 is an enlarged face view of a portion of the .article showing the indentations formed therein by this apparatus;

Fig. '7 is an enlarged fragmentary View of a portion of the indentation forming tool; and

Fig. 8 is a diagrammatic view of the apparatus showing the control system thereof.

The apparatus disclosed herein is adapted to simultaneously press a pair of oppositely dis-- posed conical recesses or indentations into an article ID. The article it, in the embodiment shown herein, is a relay armature comprising a flat iron disc having a rectangularly shaped tab I extending therefrom into the opposite edge portions of which it is desired to form conical shaped pivot bearing recesses H. The recesses II, instead of being formed directly in the soft iron armature, are formed in hardened inserts l2 secured to the armature and forming a part thereof.

The article lllis adapted to be placed on a horizontal surface or seat !5 of a work support A or block 16 (Figs. 2 and 5) mounted on a base An upwardly and formed on the forward end of the support It and is adapted to be engaged by the tab portion of the article. The article It! may be clamped against the jaw [8 by a movable jaw l9, which has a reduced forward end slidably engaging the surface l5 and a vertical V-shaped surface 2!] engageable with the edge of the article ID, The

" jaw, 19 is yieldably mounted on an actuating rod or plunger 22 for movement therewith and is provided with a longitudinal aperture 23 for receiving the rod 22. nected at one end to a piston of a fluid actuator 24 and is guidedat its forward end in a bore 25 in the support I6. A collar or shoulder '26 is provided on the rod and serves as a stop engageable with the shoulder formed by the reduced end of the aperture 23. A spring 21 encircling the. rod .22 is interposed between the shoulder 26 anda bushing 28slidably engaging the rod and threaded into the forward end of the aperture 23 and acts to urge the jaw 19 forwardly ,against the stop shoulder 26 and maintain the jaw in its forward. position on the rod 22..

A clamping member 30 operable in response to theforward movement of the actuating rod 22 is provided to clamp the article ID vertically against the surface [5 of the support It. The

member 30, comprising a bell crank having a de- The plunger 22 is coni pending arm 3 I and a laterally extending arm 32, is fulcrumed on a pin 33 mounted in a block 34. The block 34, which is mounted on the base I l of the apparatus, is recessed to receive a portion of the clamping member 30 and has a recess 35 for receiving one end of a compression spring 36, the other end of which fits into a recess in the arm 32 and urges the bell crank clamping member 31} in a clockwise direction. The arm- 32 of the clamping member 30is recessed at 38' to receive a block 39, which is pivotally mounted on a pin it carried by the clamping member 302 The clamping member 39 is urged by thespring; 36 to its inoperative position, as shown in Fig. 4, and is adapted to be rotated a counter-clockewise direction by the forwardmovementof the actuating rod 22 to clamp the article It between the lower surface of the block 39 and-the surface l5 of the support l6, as shown in Fig. 5.

Disposed on opposite sides of the work support- It and slidable in suitable guide blocks 15-46 (Figs. and 2:) are. a: pair of oppositely disposed tool actuating: rods or carriers 71-418;. The rods 471 andi 4% are connected to.- pistons. of fluid actuators. 5H: and. 5 4:, respectively, which. are mounted on the base ll f the apparatus. Each. of. the

toot carriers. idi and: 48:, at its forward end, is recessed: to receive a tool. holder &2 in. which the tool fifiiis mounted. The tool. Ehhas a conical'end 56 and a flat annular shoulder 57 around the pointed end 56.. The. shoulder 51 is engageable with thesidei of the article:- lll: to press. or flatten: the; annular ridge. formed by the end 56- during thaindentatinnforming operation. The shoulder 51: BIISQ- serves to stop:- the forward movement of the: tocl: and gage the size of the indentation, which otherwise would'bezdetermined-by the pres suraapplieditc the tools.

Thefluid actuators 50 21111151 (Fig. 8) comprise air cylinders of the same size: having reciprocable pistons. therein which are positivel driven in oppositedirections by air underpressriroadmitted through pairs of conduits or pipe lines 653, B1 and 62-; 6.8: connected to ports at the inner and? outer ends; respectively, of the air cylinders 59- and 5-1. The linesaoii and 61." are connected' at a point equidistantirom the cylinders toan airsuppi y line55' which has connected therein a: speed-control valve 66 a. SOiIenOidi operated cutoff and bleeder valve 67; check'va lve E8, anda prossureregulatihg valve- 68: set. to. provide a low" pressure in: theline The valve 69 is-connected through a line Tl to the main high pressure air supply line 12'. The

lines

62 and 63 are connected at a: point equi-distant from the cylinder to a branch: supply line. 73; which. has in it a speed control valve 16, a, so1e-- noid operated cutoff and bleeder valve IT, and. a pressure regulating valve- TBset to: provide a high: pressure in line It; By-havingthe fluid actuators 517 and 5-1 of the same size and applyingfluid thereto through the arrangement of piping disclosed, equal pressures are applied tothe pistons thereof and to the tools actuated thereby.

A branch conduit ll'c con-nects the high pressure regulating valve 18 to the main supply: Iine= 12 Another branch line 8 connected to the main supply line 72 supplies air to the air cylinder- 24 and has in it a pair of manually operated

control valves

83 and 84 and a speed control valve 85= A foot operated control valve- 87 is connected by a: line 88 between the high pressureline H and thelow pressure line 65-and serves, when operated; to pass the high pressure air from the line 1-5 through the lines 88', 65; 60 and 6! to theair cylinders 50 and 5 I".

The check valve 68 is set to pass the air therethrough in the direction of the arrow and prevent the flow of air therethrough in a reverse direction. The

speed control valves

66 and 16 are set to pass therethrough, at a predetermined rate, air exhausted from the cylinders 50 and 5| and thus regulate the rate of movement of the tool carriers 41 and 48. Air passing through the valves 66 and T6 inxa forwarddirectiontothe cylindersafll and 5+ is not affected by the valves 6% and 76. The solenoid operated cut-off and bleeder valves 6'! and H are spring-returned to normal operative position. and solenoid actuated to their other operative position. Each of the valves 6'! and 11, in: itsnormal operative position, cuts on the bleeder port'stherein and establishes communication between the lines connected to it and, in its other: operativeposition, cuts off communication between the lines connected to it and establishes connection between the bleeder ports in the valve and the line connected to the fluid actuator.

The solenoid operated valves-:65! andi lfiiarercnnnested? in electrical circuits. to. microswitches am and. are; respectively; (Fig: 8). and when either switch; is actuated, the circuit. associated; there-- with is closed. to; energize" the solenoid: connected;

therein; and shift thevalveto its .other' operative posit-1011.. The:- microswitch 82-: (Figs. 4; and: 5);,

mounted on the block 116;. is. adaptedto. beactw ated; by. a cam. 9c carried by thezmd; 221m.- response to the reciprocation: of: the rod. indicated.

Figs. hand 5',.the1switch 9.2;is actuated: or'closed when the actuatingrodli isimits retracted; POSi'r tion: and is; open; when rod; 722i is: in its ad vanced position Theaswitchsfl. (-Eigs; 4; 5;): is mountedi on the. block 3.4; and is adapted; to: be actuated; by a plunger 96: mountert'for horizontal. reciprocation in the block; 35 anzh normally: urged; to. the left, asv viewed in. Figs. 4 .amh5. by: a. spring 91-.. The plunger 9.8 i'samove'dztcz theright-to'actuate and. close the: switch .911 by-the movement of the: bell cram: clamping: member 35: in response tothe; fina'k portion: of; the. forward. movement of the actuating-rod; 2-2..

In. the: norm-at or inoperative condition of the: apparatus, as 'indi'cated in: Fig; 8', themicrnswitch 92: actuated the: circuit associated: therewith is: closed, and theso-lenoid valve 11 isactuatedt to its secondposition, cutting: oi? the bleede'r ports ot'the valve and establishing communication between the. high pressure air supply and the inner ends of the. air cylinders 51? and it. The microswi'tch in: the normal inoperative position of the a pparatus, is in it open position; and thesolenoid operated valve 6'!- is in its normal or deenergized position, cutting off the low pressure air supply to the outer ends of the air cylinders 50 and H,

hausted through the bleeder port's'of the valve 61 Operation In the operation of the mechani m. an article It is pla e on s rfa e it of he Work. support Ht with the rectangular tab portion of the article in engagement with the jaw l8'of the work support; after which the operator engages the

control valves

83 and 84 with his hands and actuates them toadmit'fiuid pressure into the end of ais 'ispse the air 'cylir'ider :4 a advancethrod 12211; is; the

rod 22 advances, it jr'n'ov'es the'jaw l9 int'oiengage disengage itself from and open the microswitch- 92 and thereby open the circuitto and deenerglize the solenoid valve 11 and veffect itsgnovement to its normal operating position tov cut off the highv pressure air supply to the lines 52 and 63 andthe inner ends of the pistons 50 and iii and, simultaneously therewith, establishcommunication between the inner 'ends of the cylinders 50 and 5| and the bleeder-"ports in the valve H.

As the actuating rod 22 continues its forward movement, the microswitch 90 will be actuated thereby through the agency of the arm 32 and plunger 96. With the actuation of the microswitch 90, the circuit is closed to energize the valve 61 and move .it to its other operative position, connecting the low pressure air supply to the lines 60 and 6| and the outer ends of the air cylinders 56 and 5| and cutting off the communication between the outer ends of the cylinders and the bleeder ports in the valve 61. Thus, with the valve 6'! moved to its other position under the influence of the energization of the solenoid, low pressure air flows into the outer end of the air cylinders 50 and 5| and moves the pistons and tools forward at a predetermined rate of movement, controlled by the valve 66, into engagement with the article ID. The movement of the tools is arrested when the ends thereof engage the article l because of the low pressure of the fluid urging the tools 55 forward and this insures that both of the tools will be in proper starting position and in engagement with the article even though the location of the articles In in the work holder may vary slightly in succeeding operations.

The operator may now step on the foot control valve 8'! to connect the high pressure air to the

lines

65, 60 and BI and to the outer end of the cylinders 55 and The high pressure air, which is the same in the air cylinders 59 and 5|, causes the tools to be advanced simultaneously and at the same rate of travel to press the conical ends 56 thereof into the sides of the article to form identical conical shaped indentations i2 therein. As the conical ends 56 of the tools are pressed into the sides of the article, the metal in the article will be displaced and tend to form an outwardly extending annular bead which will be engaged by the shoulder 51' on the tool and substantially flattened or pressed back into the article, after which further movement of the tools is arrested by the engagement of the shoulders 51 with the sides of the article.

After the indentations l2 have been completely formed, the operator may release the

control valves

83, 84 and 81. With the air pressure cut off from the air cylinder 24, the piston and the rod 22 are returned to their normal retracted position by the spring I00 in the air cylinder. As the rod 22 moves to its retracted position, it effects the opening of the microswitch 92 and the deenergization of the valve 61, which is then moved to its normal operating position to cut ofi the low pressure air supply to the outer ends of the cylinders and establish communication between the outer ends of thecylinder'fand the bleeder ports of the valve. Asthe actuator rod, 22 continues its return"movement, the micro switch 92 is actuated to effect the'movement or the solenoidoperated valve 11" to itsv energized position to reestablish communication between the high pressure air supplyand the inner ends of the air cylinders 50 and 5!. The pistons in the cylinders 50 and 5! and the tools actuated thereby will thus be moved to their retracted positionsat a rate of travel governed" by the speed control valve 66 and thereby complete the cycle of. operation.

It is to be understood that theabove-described;

arrangements are simply illustrative of the ap? plication of the-principles of the invention. Nu merous other arrangements may bereadily devisedby those skilled: in the art which will embodytheprinciples :of the invention and fall within the spirit and scope thereof.

What is claimed is:

1. A device for holding an article in a predetermined position in an article processing apparatus comprising a support having a flat surface engageable with one face of said article for supporting the article thereon, a stationary jaw on said support engageable with one side of said article for positioning said article in one direction on said support, an actuating member mounted for reciprocation on said support, a movable jaw, means yieldably mounting said movable jaw on said actuating member for movement therewith in a predetermined path toward said stationary jaw to yieldably clamp said article on said support against the stationary jaw, a bell crank, means supporting said bell crank for rocking movement with one arm thereof in the path of movement of said actuating member for actuation thereby and the other arm of the bell crank above said flat surface, said bell crank being rocked in one direction in response to movement of said actuating member in one direction to cause said other arm of said bell crank to engage an article on said support and. clamp it against said support, and means for reciprocating said actuating member.

2. A centering and holding device comprising a support having a seat engageable with one face of an article to be processed for supporting the article thereon, a stationary jaw on said support engageable with one side of said article and adapted to limit the movement of the article in one direction to a predetermined position, an

actuating member mounted for reciprocable movement on said support, a movable jaw having a recess therein for receiving a portion of said article to position said article along a predetermined center line, means yieldably mounting said movable jaw on said actuating member for movement therewith toward said stationary jaw to yieldably clamp said article against the stationary jaw and on said predetermined center line, a bell crank, means mounting said bell crank for pivotal movement with one arm thereof in the path of movement of said actuating member for actuation thereby and the other arm thereof guided for movement toward and away from said seat to clamp an article against said support in response to movement of the actuating member in one direction, and means for actuating said actuating member.

3. A device for holding an article in a predetermined position in a machine for processing said article comprising a support having a seat engageable with said article for supporting said article thereon, a stationary jaw on said support engagea'ble'with one side of said article; asjaw. movable toward said stationary jaw and having; article engaging surfaces forming a V-shaped recess for positioning said article on a predetermined center line and clamping said article against said stationary jaw,ga bel1'crank, meansmounting said bell crank for pivotalmovement and for guiding one arm thereof toward and away from said seat, a clamping element pivotally mounted'on said one armof said bellcrank engageable with an article on said seat,,a rod; mounted for reciprocable movement along a. predetermined path and engageable with, the other arm of said bell crank for rockingsaid bell crank, means yieldably mounting said movable.

jaw on said rod for movement therewith toward and away from said stationary jaw, and actue ating means for. reciprocating said rod to cause.- the actuation of saidmovable jaw and said. hell crank for effecting the centering and clamping of" said article: by'the. movablejaw against the stationary jaw and the clamping; of said article against: the seat by the clamping: element.

STANLEY J SNOREK;

REFERENCE S CITED UNITED; STATES" PATENTS Number Name Date 524,092 Marcad'er Aug; 7;,1894 1,257,391- Potuzak Feb. 16', 1918? 1,431,868 Bedell Oct. 10, 1922? 1',6'I2,082 Oakley June 5, 1928' 1,696,850 Killingsworth Dec. 25', 1928 2,004;540 Smith June: 11', 1935' 2,058,808 7 Long Oct: 27, I936?