US940914A - Apparatus for forming hollow sheet-metal bodies. - Google Patents

Description

. ADRIANGE & A. C'ALLESON.

B APPARATUS FOR FORMING HOLLOW SHEET METAL BODIES.

APPLICATION FILED JUNE 25, 1908.

Patented Nov. 23, 1909 2HBETS-SHEET 1.

WITNESSES To all whom it may concem;

iinirnii riar atria ZFEGE.

BENJAMIN anmancn AND AMOS oALLEsoN, or 'BeooKLYn, New soak; earn CALLESON ASSIGNOR TO SAID ADRIANGE.

.AEPA'US FOR FORMING 'HOLLOW SHEET-METAL BODIES.

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Specification of Letters Patent. Patented lQQV, 23, 1%fiiidi Application filed June 25 1908. Serial No. ts-0,313.

Be it known that we, BENJAMIN ADRTANCE and AMOS CALLESON, citizens of the United States, residing in Brooklyn, county. of Kings, State of New York, have invented certain new and useful Improvements in Apparatus ,for- Forming Hollow Sheet- Metal Bodies; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will en able others skilled in the art to which it appertains to make and use the same, reference being had to the accon'ipanying drawings,

and to letters of reference marked thereon, which form a part of this specification.

The purpose of this invention is to provide a practical means for imparting to sheet metal vessels having plain or straight sides a bulging form without the use of female dies or supporting means of any kind cooperating with the male die in giving the required shap'e to the side wall of the article.

In carrying out our invention, we provide a continuous series of radially movable expanding members and an actuating member therefor disposed centrally and movable axially thereof, said expanding members and the actuating member having a wedgedilze engagenuzntthe one with the other so that upon the dmvnward thrust of the latter the expanding members will be moved radially outwardly to expand the vessel being CF91 ated upon; in addition, means is provided whereby, upon the return movement of the actuating member, the expanding members will retract to their original position, 2'. 6., to an extent sullicient to permit them to clear the now relatively contracted mouth of'the vessel and, wl'iereby, thereupon, the actuating member will efi'ect the elevation, bodily, of the series oi expanding members so as to withdr; the whole from the vessel ready f r its; next operation on another vessel.

The invention trated in the wherein,

Figure 1 is a plan view of the device, herein termed a chuck forming the subject hereof; Fig. 2 is a view showing the actuating member partly in side elevation and partly in vertical section and the series of expanding members in vertical: section, the plane of section being substantially coin;

will be found fullyl illus eeei'anpanying drawing,

cident with the axis of the chuck; Fig. 3 is i a horizontal sectional view on the line w-a3 of. Fig. 2; Fig. i is an isometric viewof one of the parts of the series of expanding members; and, Figs. 5 and 6 show the vessel bean fore and after being-subjected to the action of the chuck. It will be understood that the chuck herein described is carried by the vertiealigy mciprocating plunger of a suitable press, 55

which plunger operates toward and from the bed plate ofsueh a machine. V

Referring to Figs. 1, 2 and 3, a is the part hereinbefore referred to as the actuating P 70 member This consists of the truncate cone 6 having the upwardly projecting stem 0, whereby to attach it'into the plunger (if the press, and a downwardly projecting stem d the lower end of the cone has the lesser d1ameter,.but that diameter is somewhat re greater than that of the stem d, so that a V .1! ,L T shoulder e is iornied. Onto-the stem at is fitted another truncated cone 7 whose lower end is substantially flush with the end of stem (Z when said 'coneabuts, in the proper so arrangement or" the parts, against the shoulder in which position it may be held by the count rsunk head g of ascrew it. While m in the foregoing and. in the drawings the two cones are represented as non-integrai as parts and the cone is described as having a substantial support against the shoulder 6, so that to all eii'eets and purposes the two cones are as rigidly disposed relatively to each other as though they were integral, it so limited to bodies, of

will be understood that we are not. forming said cones separate metal.

The upper of cone has a 'reater diameter than the loser end of cone forming the shoulder i. v

' y designates one of the parts forming the series or" tf iltli'ltliilg members. Each of these is shaped bstantialiy shown. in Fiat, 4., to wiein i a, ing the upper tion in of its inside 3193 inclined at pitch corresponding to that of he lower portion of i the cone a 3 thus sub parallel with each other, and they joined by a surface at, substantiaily paraiiel; with the end faces of the part i, and item an abutment to take the rims pact of the shoulder i of cone f.

o. corresponding to tha time as a sectonshape-d body I; ar too The surfaces in and Z are too.

' tuating member a, the surfaces 70 and Z of,

v The several parts Z are arranged in circuby. As a result of this, the vessel is allowed lar disposition, as best seen in Flg. 1, relal to assume a concave form in its base or bottively tomember a. They are furthermore formed with a continuous external groove 71, which receives an endless spiral spring 0 tending to contract the series and thus cause them to move bodily downward on the acsaid members bearing on the faces of the cones.

The acting portion of the expanding memhers is approximate to the lower half, more or less, ther'eof; accordingly each part j has its outer surface in the lower part thereof convex, as at p.

In th epperation of the chuck, which is assumedgto be opcratively attached to the plunger'ofthe press, the vessel to be shaped is placed over the chuck which, at that time, is elevated from the bed plate and has assumed its contracted form since, being clear of the bed plate beneath it, the spring 0 is free to draw the members i together to an extent limited by the contact of their abutments on with the shoulder i. \Vhen the plunger of the press descends, the vessel is brought against its bed plate, directly taking the thrust of the members i whose downward movement is thus checked. I It will be understood thatthe vessel substantially fits the chuck in its contracted condition. Although the members 7' are prevented from further downward movement by the opposition of the bed plate, the actuating member a is still free for further downward movement, and as this now follows, the cones Z2 and 7 cause the series of members 7' to be exanded, they acting to expand or bulge the essel. On the return or upward movementof the plunger of the press, the spring 0 V operates to contract the members j as above described, this action continuing until the shoulder 2' takes against abutments'm, whereupon the vessel may be removed from the chuck as soon as the chucl: has assumed the proper elevation relatively to the bedplate.

It will be observed that the bottom of the chuck is slightly concave, which effect is produced by imparting a slightly inclined disposition to the lower face of each member tom wall.

It will be observed that the means acting to contract the series of expanding members is disposed between the lowermost and uppermost points of contact between said members and the actuating member, that is, in a plane cutting the Zone of wedge-engagement between the members; thus any tendency toward the producing of an oscillating or rocking movement on the part of the ex panding members under the action of the actuating inember, as might be possible were said means located outside of (insteadof between) these points, is prevented and each expanding member moves inwardly under a condition of perfect face-to-face contact with the actuating member.

Having thus-fully described our invention,

what we claim as new and desire to secure by Letters Patent is:

The combination, in a bulging chuck, of a continuous series of radially movable expanding members, said series of members having downwardlytapermg upper and lower inside face-portions and a shoulder between said upper and lower face-portions, an actuating member surrounded by said expanding members and comprising a downwardly tapering truncated cone forming a shoulder at 1ts lower end, a relatively reduced stem pro1ect1ng from the lower end of said cone and another downwardly tapering truncated cone arranged on said stem and abutting against the second named shoulder, said last-named cone having its upper end larger than the lower end of the first-named cone and adapted to engage the first-named shoulder, and a contracting means surrounding said series-of expanding members, substantially as described.

In testimony, that we claim the foregoing, we have hereunto set our hands this 22" day of June, 1908. l

BENJAMIN ADRIAN-CE. AMOS CALLESON. Witnesses:

W. F. HORN, JAMES VAN WICKLEN.

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