US1671619A - Punching apparatus for radiators - Google Patents

Description

May 29, 1928. 1,671,619

J. w. vANcE PUNCHING APPARATUS FOR RADIATORS Filed July 9, 1925 s sheets-sheet 2 Clawwup.

May 29, 1928. *n 1,671,619

J. w. vANcE PUNCHING APPARATUS FOR RADIATORS Filed July 9, 1925 3 Sheets-Sheet 3 K I @@W' Patentedv May 29, 19,28.

UNITED STATES .oHN w. vANcE, on DETROIT, Ironman.

PUNiCHIN G APPARATUS FOB BADIATOBS.

Application filed July 9,

This invention relates to a punching apparatus for radiators, and has special reference to the punching of radiator shells to provide a `multiplicity of openings aboutthe shell `with the openings arranged so that a hood or any suitable structureor device maybe attached thereto. In the production of a large uantity of radiator shells for any particu ar automobile all ol the openings punched in the shell must be properly spaced and uniform in size. It isthe present practice to `punch these shell openings one at a time or in small groups with result that considerable time and labor are required and i very often an openinor misplaced `which results inwaste and delaay.

My invention aims to provide an apparatus that may be used in various types of resses or other machines having a presser iiead or plunger for striking a blow. ,Such i a head or plunger is utilized in connection` with my apparatus for simultaneously operating a plurality of punching instrumentalities Whlch are arranged'about'a shell die so that a radiator shell ma have all of its openings punched at a single operation.

y invention further aims to provide novel punching instrumentalities that may be arranged for simultaneous operation on 3,0 a piece of work, land each `instrumentality includes a punch; wedge means for actuating the` punch; `means for1 lubricating the punch, and a strip er device.` rllhe construction of` the punc ling instrumentalities is such that they may be easily grouped about the piece of work and positively lixed to insure accuracy. Many advantages are gained from the economical and expeditiousmanner in which the radiator shells are punched. 4o Some of these advantages will hereinafter appear when describing myA invention in detail by aid of the accompanying drawings, wherein y v y Figure '1 is a plan of a portion of the apparatus with a portion of a radiator shell 1n Iposition to be punched; ig. 2 is a side elevation of the same;

Fig. 3 is a plan of a portion oli' the bed plate showing a stationary shell diethereon; `F ig. 4 is a side elevation of a unching instrumentality `with a portion o the vbed plate in section; p

Fig. 5 isalongitudinal sectional view of a portion of the punching instrumentality showing the punch as having been actuated; housings on the bedplate 1.

laas.` semi No. 42,359.

Fig. 6 is aplan of the punching instrumentality shown in Fig. 4' and Fig. 7 is a vertical sectional view of another form of punching apparatus.

To put my invention into practice, I provide a light and durable bed plate 1 and in this bed plate are a series of outer openings 2 and a series of inner openings 3. The outer openings 2 are adapted `for anchoring individual punching instrumentalities and the inner openings are used for anchoring a stationary die, consequently these open-` ings are accurately positioned inthe bed plate so that no mistake may occur in locat` ing the partsadapted to position a radiator shell While other parts operate upon the shell. y

The inner series ol? openings 3 are adapted to receive screw bolts 4 and these screw bolts anchor the lateral llanges 5 of die holders 6 on the bed plate 1. The die holders 6 have shoulders 7`- and seated on said shoulders are dies 8 retained thereon by screws 9 or other fastening means. The `dies 8 have punch openings A10 alining with slug openings 11 in the shoulders 6.

As shown in Fig. 3 some of the holders 6 may be straight and otherscurved and the configuration of the entire die depends on the piecerof `Work to be punched. In this instance it is a radiator shell 12 having an inset liange 13 which must be provided with a plurality of spaced openings 14. The top and bottom flanges 13 are to be punched and the die of the bed plate is arranged sothat the radiator shell 12 may be placed down on the die with the inset flange 13 about the dies 8 so that these `dies will back up the flange 13 during punching operations.

The outer series of-openings 2 of the bed 95 plate lare adapted to receive screwI bolts 15 which enter the base pieces 16 of punch housings 17, said base pieces fitting under under-cut ortions 18 of the die holders 6, so that said die holders may woperate with the screw boltsV 15 in preventing vertical displacement of the punch housings. To prevent lateral displacement there are side tie rods 19 screwed into the die holders 6 and supporting clamping `bars 20 against the outer ends of the housingibase pieces 16. Nuts 2l on the ends of the tie rods 19 ermit of the bars2() being clamped against the punch housings to hrmly anchor said The punching instrumentalities are identical in construction, atherefore I deem it only necessary to specifically describe one of these devices.

Each punch housing 17 has n vertically disposed bore 22 and communicating with the lower end of said bore is a lateral bore 23. Slidable in the lateral bore is a liori zontal wedge 24 having its 'inner end beveled, as at 25 'for engigement with the lower beveled end 26 of a vertical wedge 27.` 'The wedges 24 and 27 are 'preferably cylindrical and the walls of said wedges and bores are adapted to receive lubricant `from suitable cups 28 carried by the housing 17 `and coininunicating with the bores 22 and 23 by ports 29 vin said housing.

lThe vertical wedge 27 is provided with al longitudinal groove fl() into which extends the iniier end of a stop screw l3l, said screw cooperating with ends of ,the groove iii 'limiting the rsliding movement of the vertical Wedge 27 Ain the bore '22. ,'Tlie vertical Wedge has its upper end projecting above the housing 17 and ,provided with a screw 32 adapted to be adjusted and set relative .to the upper end of the vertical wedge by a lock nut Onthe outer end 4of the iliorizontal wedge 24 (is ahead 34 =provided with a transverse dove-tailed groove 35 `for adove-tail `punch holder 36 which fmust-be lplaced endwise in the head 34. Screws `or other fastening means `may 'be employed lfor anchoring the punch holder.

In .the `,punch holder are openings 38 for punches 39, said Apunches having heads 4() seated in the punch holder 36 and `outer reduced Vends 4l that actually .do .thepunching A vWhat maybe considered vthe outerei'id of the punch housing `17 has a stationary support 442 for a retractile device 43, preferably in the forni of a heavy rubber `sleeve about the support 42. The iouterendlol' the rubber sleeve 43 isengaged by a Aplate 44having side ears 45 ltor connecting rods 46, said rods extendinginwardly at the sides of the'liousing 1T with `the innerends thereof kmounted in `the head 34 so thatthis head will Abe held normally againstthe innerfend ofthe housing 17.

W'henthe vertical .wedge Y27 `is struck a blow toiactuatethe `horiaontal wedge 24 the rubber sleeve 43 is placed under compression .or stressed .to the extent `o' providing a force lwhich will retract the head 34 and the wedges and 27 after each Apunching operation. The retractile device 43 also serves as a. cushioning element and in this connection may be considered the mechanical equivalent .of .aretractile spring.

Betweenthe `punch .holder 36 and the die 8 ris a .stripper bar 47 having itsendsprovided with dowel pins 48 sldable through the punch holder 36 and in the head 34.

The stripper bar 47 has openings 49 corresanding in number to the punches 39. 'l is stripper bar is reciproca'ble relative to the reduced punching end 41 of the punchers 39 amd smid .stripper bar is adapted to press the shell flange 14 against the die 8 during the punching operation, so that the flange cannot be distorted by the punches 39 said punches drive the slugs into the openin s 10 of the dies and the openings 11 of the ho' ders (i. Y

With. the punching instifunientalities grou d about the vlarge shell die, as shown in Fig. 1, a'll of the wedges27 are vertically disposed with the screws 32 thereof in substantially the saine"`horizonta;l plane, conseiuently a large presser head or plunger 5t), orming art of an ordinar press o r panelliiiie may be ein 'eyed for sixnifl taneously operatin all `o' 'the ,punchin .in-p strumentalities to simultaneously provi' e the flange open-ings '14. It is onl necessary for' a workman lto place the -ra ator .shells 12 in position, cause the presser head or punch 50 to strike a blow, and then remove 'the punch shell and place another in position.

In Fig. 7 I show another 'form of appa.- ratus wherein the expansive force of a spring 51 holds the vertical wed e ,27 against'the plunger 50. The inner en' s of . theedges 27 and 24 are squared 0E and abody of' oil or other liquid '52 is placed in the bore22, between the` wedges. The bore -22 haslan annularchamber 53 supplied with .oil or liquid from areservoir 54 andwlienthe vertical wedge 27 is depressed a quantity of .oil is trapped in the bore and constitutes a medium of coin ression against thehorizon'- ing mac tal wedge 24. f course, the oil serves asa lubricant andthe reservoir, supply 'takes care of any oil leakage.

'It is thought that the operation and utility of my punc ing a paratus-willibela parent without further *escriptiom -and .w ile'in the drawings, there is illustrated a lpreferred embodiment of my invention, it `1S to be understood that the structural elementi are susceptible to such variations and lmodi- Iicationsas fall within the scope'of theagpended claims. A

What `I .claim isz- 1. A punching instrumentality comprising a housing, punches, Wedgesadapted .toactuate said punches, retmctile ,means v.at one end of said housingfor said l.punches,.and stripper bar at the opposite end oflsaidlhnsing.

2. A unching .instrumentality 4vcalld for in. im Al, wherein saidwedgesaredisposed in housing bores `one ata right angle to the other.

3. A punching instpumentality as called for in ,claim l, and a `blow receivingscrew carried byoneiof said wedges 4. A punching instrumentality as called msy for in claim 1, wherein said retractile means 6. A punchin instrumentality as called includes a support, a rubber sleeve on said for in claim 5, Werein said retractile means support, and a plate bearing against and conincludes a rubber sleeve, and a plate bearing nected to one of said wedges. against said rubber sleeve and connected to 15 5 5. A punching instrumentality comprising said horizontal wedge.

a housing, a vertical Wedge in said housing 7. A unching instrumentality as called adapted to Mbe struck a blow, a horizontal for in c aim 5, and a stripper bar slidably wedge in said housing actuated by said Vversupported relative to said punches.

tical wedge, a punch holder supported from In testimony whereof I alix my signature. 10 said horizontal Wedge, punches in said n holder and retractile means for said punches. JOHN W. VANCE.

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