US2160975A - Method and apparatus for forming metallic receptacles - Google Patents

Description

June 1939- J. K. MATTER ET AL 2,160,975 I METHOD AND APPARATUS FOR FORMING METALLIC RECEPTACLES Filed Dec. 28, 1935 2 Sheets-Sheet 1 &

A TTORNEY I June 6, 1939. J. K.- MATTER ET AL 2,160,975

METHOD AND APPARATUS FOR FORMING METALLIC RECEPTACLES Filed De'c. 28, 1935 Q2 Sheets-Sheet 2 INVW V? M receptacles of adapted to'making' metallic receptacles having a- Patented June 6, 1939 METH0D. AND APPARATUS FOR FOBMIN METAILIC' RECEPTACLES James J. Horak,

Matter, La Grange, m, and Gustave Newliensington, Pa assignors to The Aluminum Cooking Utensil Company, New .Kensington, Pa., a corporation of Pennsylvania Application December 2:, 1935, Serial No". 56,464

a Claims. ('01. 113-52) This inventionrelates to an apparatus for and method of making metallicreceptacles, and while the invention can be applied to making metallic various kinds, it is particularly thick bottom and topedge and -a relativelythin, smooth side wall by drawing and spinning heavy gauge metal. v

An object of this invention is to provide an improved apparatus for forming metallic recep- .tacle having a thick bottom and top edge and a side wall of varying thickness.

A further object of the invention is to provide a method by which a metallic receptacle having a thick bottom and top edge, arelatively' thin side walland an integral supporting chime around its bottom may bedrawn and spun.

A further object of. this invention is to provide a process by which a metallic receptacle having a thick bottom and top edge and a smooth, relatively thin sidewall can be completely formed by a single spinning operation.

The invention has for iurther objects such other operative advantages and results asare found in the apparatus and method described and claimed herewith.

The present invention will be described in connection with selected illustrative embodiments thereof in apparatus shown in the accompanying 'drawings, wherein: a

Fig. 1' is a plan view oithe spinning machine proper showing thework in section;

Fig. 2 is an end elevational section;

Fig. 3 is a view similar tom. 1, but showing a modified form-oi the invention; v 1" Figs. 4, 5, 7 and 9 are views partially in section showing various receptacles formed in accordance with the invention;

Fig.6 isa view partially in section similar to -Fig. 3- but illustrating a later stage oi. the operation;

Fla. 8 is. a view'pmi uy in section showing the drawn blank from which. a receptacle'is to be 5 formed by spinning.

Referring to- Figs. will be seen that the machine is supported upon the general frame-work i oija lathe oi conventional construction, a portion of which, including 50 legs 2 and parallel side frame members I, is shown in the drawings. The side frame members 3 are providedwith guides 4 upon which aftool car.-

riage 5 is mounted :iorflongitudinal reciprocal 'movement.- Spinning rolls 6, are rotatively mounted on the rollfsupporting slides I, which view partially in 1 and 2 of a. drawin it are in turn mounted so as to be transversely movable along the guides of the carriage 5.

The carriage 5 may be reciprocated on the guides l by any suitable mechanism such as, for instance, that shown in which screw shafts 9 are employed. The screw shafts 9 are arranged to engage screw threaded apertures in the carriage i and maybe driven in any convenient manner. -'I'lre spinning-rolls 6 are preferably tapered over a greater portion of their length as shownat ii, the tapered portion being utilized in spinning the heavy gauge metaito form the side wall of the receptacle. At one end of these rolls, the

. tapered portion J5 joins a cylindrical portion 16 which in use smooths out the surface of the side wall of the receptacle. The rolls 6 are preferably so arranged that one roll will slightlylead the other during the formation of the receptacle.

The spinning rolls are fed into and away from the work by any suitable mechanism such as the 'one shown in Fig.2 of the'drawings, for example. Here nuts I! are secured to the roll supporting slides 'I by screws IS. The feed screw l9, extending across the machine and provided at one end with a right-hand screw thread, and at the other with a left-hand screw thread, ,is arranged in similar screw-threaded apertures in the members l1.. A hand wheel 20 upon one end of the feed screw I! serves as ameans for turning the screw and causing, the roll supporting slides 'I' and the rolls 6 to move toward, and recede from each other as desired.

The drawn blank 2| from whichthe finished receptacle is made is shown in Fig. 8 o! the drawings. "During the spinning operation this blank issupported upon a mandrel "22. The mandrel 221s mounted at one end upon .a chuck it and p is secured thereto by bolts 24,- arranged in- T- shaped slots formed in the face of the chuck. At the opposite end the blank is held on the mandrel by a tailstock 26.

The operation of the mechanism shown in Figs.

11 and2 will now be described. The blank II which has been formed from a sheet of rather heavy gauge inetal by'a drawing operation or in other suitable manner is placed upon the mandrel 22. The mandrel 22 is Irotatedand the rolls .6

' vare fed into the blank II by rotating the handwheel 2.. The carriage 5, upon which are mounted the roll-supporting slides, 'I,'is fed along the lathe bed 3 and thespinning rolls 8 act to spin out the central portion of the side wall oi the receptacle, leaving-the bottom of the receptacle and its upper edge the original thicknessoi the blank 2|. at the beginning' of the movement of backed away from the receptacle at a point some distance from the top edge of the receptacle.

Obviously, by the method just described, it is possible to form a finished metallic-receptacle having a thick bottom and top edge and a smooth relatively thin side wall bya single spinning operation.

It will be evident that the apparatus described need be altered only slightly to produce various shapes of metallic receptaclea- If a receptacle similar to the one 29 shown in Fig. 5 is desired which has, in addition to a thick bottom and top edge and a relatively thin side wall, an integral supporting head or chime 30 around its bottom, rolls 3i similar to those shown in Fig. 3 of the drawings should be employed. The rolls 3| are formed with a cylindrical portion 32 at one end, an adjoining tapered central portion 33 and an adjoining cylindrical portion 34 at the other end. If preferred, the rolls 3i may be rounded slightly at either or both ends.

To aid in forming, around the receptacle bottom, the integral supporting chime '30, it is preferable that a tailstock 35 of the type shown in Figs. 3 and 6 of the drawings be provided. This tailstock is preferably formed with a tapered portion 36.

In theoperation of this embodiment of the in vention, the thin side wall of the receptacles are formed in much the same manner as that described hereinabove except that the spinning operation is begun at apoint slightly higher along the side of the blank 2 I. After the side wall and the top rim of the receptacle have been formed, the rolls=3i are fed along the screw shafts 9 in a reverse direction until the lower' portions 32 of thefspinning rolls come into contact with the excess of metal 28' remaining at the bottom of the unfinished receptacle. This causes the excess metal to flow in the opposite direction from the flow of metal during the formation of the side 'wall, thereby producing the integral supporting chime 30 shownon the receptacle 29.

Receptacles made by the process and apparatus embodied in the present invention may, of course, be formed inany suitable size or shape. A few such receptacles are shown in the drawings. In each instance the manufacture of these receptacles is essentially the same,'that is, a cup-shaped blank of heavy gauge metal is spun out so that a metallic receptacle having a thin side wall and a relatively thick bottom and top edge is formed. The design of the top edge may be varied, of course, by changing the'design of the rolls used to perform the spinning operation.

As pointed out hereinabove, the receptacle 21 may be readily formed by utilizing the apparatus shown in Figs. 1 and 2, while the receptacle 2! with its chime 30 may be manufacturedby the embodiment of the invention shown in Figs; 3

and 6 of the drawings. The receptacle fl'shown in Fig. 918 formed in much the same manner. as the receptacle 2 9, with the exception that its integral chime 38 is exteriorly tapered by utilizing during the reverse spinning operation the taperedportion 83 of the'rolls 3|. The chime 39 shown onthe. receptacle 48' in Fig. 4 may be formed by .usingthe rollsli so, that the portion 32 of-the' upper boss and then pergle spinning operation. Furthermore, it will be seen that a practical means has been provided for forming anrintegral supporting chime about the base of a metallic receptacle.

It will be understood, of course, that while this invention has been described with reference to .certain preferred embodiments thereof, various modifications and changes may be made therein within the spirit of the invention, as set forth in the appended claims.

We claim:

1. A method of forming ametallic receptacle,

which method comprises providing a cup-shaped blank having a bottom and side wall of relatively heavy gauge, spinning the central portion of said side wall to cause the metal therein to flow in the direction oi. the open end of said blank, and subsequently forming a chime around said bottom by spinning the lower edge of said side wall past said bottom in a reverse direction.

2. A method of forming a metallic receptacle, whichlmethod comprises providing a cup-shaped blank having a bottom and side wall of relatively heavy gauge, spinning the central portion of said side wall to cause the metal therein to flow in the direction of the open end of said blank, and subsequently spinning the lower portion of said side wall past said bottom to form a support for said receptacle. i

3. The method of forming a metallic receptacle which comprises providing a cup-shaped blank having a bottom and side wall of relatively heavy gauge, spinning said side wall from a point above said bottom by spinning means to cause a metal flow in the direction of the open end 01' said blank and simultaneously smoothing the surface thereof, and subsequently forming a bead around said bottom by spinning the lower edge of said side wall from a point direction.

4. The method of forming a metallic receptacle which comprises providing a cup-shaped blank having a bottom and side wall of relatively heavy gauge, spinning the central portion of said side above said bottom in a reverse wall by spinning means to cause a metal flow in the direction of the open end of said blank, simultaneously smoothing the surface thereof, and subblank. and forming a chime around said bottom by spinning-the lower edge of said side wall in.

a reverse direction.

6. The method 01' forming a metallic receptacle which comprises providing a cup-shaped blank having a bottom and side wall of relatively heavy gauge, spinning saidside wall from apoint above the bottom of the receptacle to cause a metal flow in the direction of the open end of said blank,

simultaneously smoothing out said side wall, and forming achime around said bottom by spinning 2,100,976 v 3 the lower edge oi said side wall in a reverse ingin combinationarotary mandrel iorinteriordirection. ly supporting said blank, a tail stock adapted 4 'l. Apparatusior forming a metallic receptacle to engage the bottom of said blank, a plurality from a cup-shaped metal blank having a bottom 01 reducing rolls movable along said mandrel and side wall of relativelyheavy gauge, comprisin contact with said hi said reducing rolls 5 ing in combination a rotary mandrel for supporthaving their axes parallel with the axis 01' rotaving said blank, a plurality of reducing rolls movtion of said mandrel and having a cylindrical able along said mandrel in contact with said portion at each end joined by a tapered Dorblank, said reducing rolls having their axes partion, adjusting means to move said rolls to radially allel with the axis 01 rotation of said mandrel fixed positions with respect to said mandrel'and' and be n tapered over a greater port on o means to move said rolls'along ,saidmandrel in their length and cylindrical for the remainder both directions, whereby the side wall oi said thereof, common adjusting means to move said blank is elongated and reduced in thicknessby rolls, to radially ilxedpositions with respect to the tapered portions oi said rolls and simultasaid mandrel and means to move said rolls-along nequsly smoothed by the cylindrical portions, and 15 said mandrel, whereby the side wall of said blank adapted by moving in a reverse direction to form iselongated and reduced in thickness by the g chime around said bottom otsaidblank, the tap d po s 0 Said r s an S mul y interior configuration 01' said chime being oonsmoothed by the cylindrical portions-oi said rolls. t l by th shape of the tail stock engaging 8. Apparatus for forming .a metallic receptacle said tm t o 20 from a cup-shaped metal blank-having a bottom JAMES x. MATTER;

,and side wall of relatively heavy'gauge, comp ris- GUSTAVE. J. HORAK.

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