US2147392A - Sheet metalware production - Google Patents

Description

Feb. '14, 1939.

G. M. AMBRQSIUS SHEET METALWARE PRODUCTION Filed April 29, 1936 2 Sheet-Sheet 1 IN VENTOR.

w Wm wnwm a a o r n M A a. M m a Z PW Feb. 14, 1939. G. M AMBROSIUS SHEET METALWARE PRODUCTION 2 Sheets-Sheet 2 Filed April 29, 1936 ZNVENTOR ATTORNEY);

Patented Feb. 14, 1939 UNITED STATES PATENT OFFICE.

SHEET METALWARE PRODUCTION Application April 29,

11 Claims.

This invention relates to sheet metal ware production, and it is among the objects of the invention to provide for special indenting of the edge of headed sheet metal containers, such as grease cartridges, etc. Other objects and advantages will appear as the description proceeds.

To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described, and particularly pointed out in the claims, the following description and the annexed drawings setting forth in detail certain illustrative embodiments of the invention, these being indicative however,

of but a few of the various ways in which the principle of the invention may be employed.

In said annexed drawings:-

Fig. 1 is a plan view of die mechanism embodying the invention; Fig. 2 is a vertical section thereof taken on a'plane substantially indicated by line II, Fig. 1; Figs. 3 and 4 are front and rear elevational views respectively; Fig. 5 is a vertical sectional view taken on a plane substantially indicated by line VV, Fig. 1, that is the work support is removed; Fig. 6 is a similar view showing the die in closed position; Fig; '7 is an enlarged sectional view similar to Fig. 2, showing the work piece in position and in process of die action; and Fig. 8 is an end view of the work piece or product as completed.

Referring more particularly to the drawings, there is shown a die comprising a die head or block 2 held by suitable means, as screws 3 to the support 4. Mounted in. the die head or block is a: set of die elements 5 which are radially movable and may be in the form of slide-elements riding in corresponding guide-ways in the die head and arranged to expand to engage the inner periphery of the end of a depressed headed container. 0, Fig. 7. Coacting with the die elements 5' is another set of outer the elements 8 mounted in reciprocable condition whereby to move radially, as for instance in guideways in the die elements 5 and die head. The outer: perip-hery of the internal die elements 5 have one or more die-recesses 9, and the inner periphery of the outer die elements 8 have a corresponding set of die-projections It, whereby to indent or upset inwardly a narrow portion of the headed end of the sheet metal container C, the number of such indentations produced depending upon the particular number or configuration desired, the illustration showing three equi-spaced indentations d, Fig. 8. A retaining ring l2 held to the die block by suitable means, as screws l3, serves to retain the movable sets of die. elements 1936, Serial No. 76,912

while allowing their radial reciprocative movements. Convenient means for automatically separating the inner and outer sets of die elements 5 and 8' is provided, and this may be for instance in the form of a spring M interposed in a suitable recess and more or less housed between the elements 5 and 8. With such arrangement, the inner and outer dies are normally separated, as shown in Figs. 2 and 5. For actuating or movingthe inner die elements 5 radially outwardly, a suitable spreading or thrusting means is provi-ded, and this may take the form for instance of a tapered plunger 1 5' which is reciprocable centrally" of the die elements 5 to expand them to their outward position, and such plunger may be reciprocated by suitable means, as for instance the wedge element H5 carried by die plate ill, and being reciproeably movable therewith by suitable reci'procative press means the details of which are immaterial, it being understood that the die plate i l may be secured by its stud it to a suitable reciprocating member of a press, mechanical? or hydraulic or the like, and the other die member 4 is secured to the other jaw of such press.- For returning the spreading plunger it, suitable means are provided, preferably an automatic means, as for instance a spring 253 on a stemextension 21,. the spring being arranged between the shoulder" 22 of the die member and a collar 23 on. the stem 2|. To limit the back movement of the stem 21 and the plunger it, a stop 24 may be secured to the die member by suitable means, for instance screw 25. With such arrangement, the inner die members 5 are spread or moved radially outwardly when the plunger is thrust. against them by the Wedge it, on the downward movement of the die plate ll, while ontheupward movement of the-latter the spring 20 draws the plunger l'5 back and allows the die members 15 to contract.

Arranged to cooperate with the movement of the inner die members 5, is a suitable means for moving theouterdie elements 8, and conveniently thissmay take the form of cam operating means, such as an annular member 28 having cam races 2.!- bearing on the outer die elements 8, the latter having suitably-- contoured coacting faces. The cam annulus 28 is conveniently also mounted in position by, the retaining ring it, the cam annulus being suitably shouldered as at 38 therebehind, suchas to prevent disassembly but allow of rotary or oscillating movement of the cam annulus as. mounted: by the retaining ring. For oscillative. movement of the cam annulus 'a laterally projecting arm 3l is arranged to receive rocking movement by suitable means, for instance a link 32 mounted on the die plate I1 and being reciprocable therewith. Desirably, a small amount of lost motion is permitted, for instance by a connection through slot 33 in the link and pin 34 on the arm 3|. With this, the operation of the respective portions of the die mechanism can be suitably timed, the wedge element l6 beginning its operation of expanding the inner die elements suitably in advance of the closing of the outer die elements.

The general operation will be understood from the foregoing. With the die open or in the position shown in Fig. 2, the operator sets a blank on the work support 36, this being of suitable holding form, for instance trough-like, as shown more fully in the end view Fig. 3. The blank comprises a sheet metal tubular body 31 and a depressed head 38 flanged together. With the edge thereof in position against the die block 2 and the die plate [1 coming into reciprocativemovement, the wedge member I6 is thrust against the spreading plunger l5 which thereupon spreads the radially-movable inner die elements 5 to their outer position against the inner periphery of the depressed container-head 38, as seen in Fig. '7. With the internal die elements 5 thus in position against the work-piece, the further descent of the die plate I! causes the link 32 to rock the arm 3| and thereby oscillate the cam annulus 28, whereupon the cam races 29 force the outer die elements 8 to their inner or closed position, and the die projections Hi thereof thrust inwardly against the periphery of the end of the work piece and force the metal thereof into the die recesses 9 of the internal dies, thereby forming the indents d as shown in Fig. 8. With the raising of the die plate ll, the cam annulus 28 is turned and the cam races thereof moved away from the external die elements 8, and the wedge member l6 withdraws from the spreading plunger [5, allowing the spring 20 to pull the latter back, and spring means l4 spreads and opens the die couple, whereupon the completed work C is withdrawn by the operator and a new blank substituted, and the operation repeated, etc.

Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be employed.

I therefore particularly point out and distinctly claim as my invention:-

1. In mechanism of the character described, a die block, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, three equi-spaced outwardly directed narrow dierecesses in said die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a wedge member reciprocable transversely to operate said tapered plunger, spring means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, spring means for separating the outer and inner die elements, an annular member with internal cam races bearing on said outer die elements, an arm projecting laterally from said member, a link and a lost motion pin and slot connection between said link and said arm, actuating means in common connected to said link and the aforementioned wedge member, a retaining ring forwardly of said movable die elements, and a work support forwardly thereof.

2. In mechanism of the character described, a die block, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, outwardly directed narrow die-recess means in said die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a Wedge member reciprocable transversely to operate said tapered plunger, spring means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, spring means for separating the outer and inner die elements, an annular member with internal cam races bearing on said outer die elements, an arm projecting laterally from said member, a link and a. lost motion pin and slot connection between said link and said arm, actuating means in common connected to said link and the aforementioned wedge member, a retaining ring forwardly of said movable die elements, and a work support forwardly thereof.

3. In mechanism of the character described, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, outwardly directed narrow die-recess means in said die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a wedge member reciprocable transversely to operate said tapered plunger, spring means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, spring means for separating the outer and inner die elements, an annular member with internal cam races bearing on said outer die elements, an arm projecting laterally from said member, a link and a lost motion pin and slot connection between said link and said arm, actuating means in common connected to said link and the aforementioned wedge member, and a work support forwardly thereof.

4. In mechanism of the character described, a die block, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, outwardly directed narrow die-recess means in said die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a wedge member reciprocable transversely to operate said tapered plunger, spring means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said firstnamed die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, spring means for separating the outer and inner die elements, an annular member with internal cam races bearing on said outer die elements, an arm projecting laterally from said member, a link connected to said arm, actuating means in common connected to said link and the aforementioned wedge member, and a work support forwardly of the die block.

5. In mechanism of the character described, a die block, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, outwardly directed narrow die recesses in said internal die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a wedge member reciprocable transversely to operate said tapered plunger, spring means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said firstnamed die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, spring means for separating the outer and inner die elements, an annular member with internal cam races bearing on said outer die elements, an arm projecting laterally from said member, a link connected to said arm, and actuating means in common connected to said link and the aforementioned wedge member.

6. In mechanism of the character described, a die block, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, and means for inwardly offsetting spaced portions of the extending free end edge of the depressed headed sheet metal container, including outwardly directed narrow die-recesses in said internal die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a Wedge member reciprocable to operate said ta.- pered plunger, spring means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements mov able radially to close in on the outside of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, an annular member with internal cam races bearing on said outer die elements, an arm projecting laterally from said member, a link connected to said arm, and actuating means in common connected to said link and the afore-mentioned wedge membar.

7. In mechanism of the character described, a die block, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, and means for inwardly offsetting spaced portions of the extending free end edge of the depressed headed sheet metal container, including outwardly directed narrow die-recesses in said internal die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a Wedge member reciprocable to operate said tapered plunger, means for withdrawing said tapered plunger when said Wedge member is in its remote position, outer die elements movable radially to close in on the outside. of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, an annular member with internal cam races bearing on said outer die elemerits, an arm projecting laterallyfrom said member, and means iii-common for operating said arm and the afore-mentioned wedge memher.v

8. In mechanism of the character described, a die block, internal die elements radially expandible to engagetheinner periphery of the end of a depressed headed sheet metal container, and means for inwardly offsetting spaced portions of the extending free end edge of the depressed headed sheet metal container, including outwardly directed narrow die-recesses in said internal die elements, means to operate said die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a wedge member reciprocable to operate said tapered plunger, means for withdrawing said tapered plunger when said wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, an annular member with internal cam races bearing on said outer die elements, and means for actuating said annular member and the afore-nentioned wedge member. 9. In die mechanism of the character described, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, and means for inwardly offsetting spaced portions of the extending free end edge of the depressed headed sheet metal container, including outwardly directed narrow die-recesses in said internal die elements, means to operate said die elements, a tapered plunger reciprccable centrally of said die elements to expand the same, a wedge member reciprocable to operate said tapered plunger, means for withdrawing said tapered plunger when said Wedge member is in its remote pcsition, outer die elements movable radially to close in on. the outside of the headed container opposite said first-named die elements, die projections on said outer die elements to mate with the outwardly directed die recesses on said inner die elements, an annular member with internal cam races bearing on said outer die elements, and means for actuating said annular member and the aforementioned wedge member.

10. In die mechanism of the character described, internal die elements radially expandible to engage the inner periphery of the end of a depressed headed sheet metal container, and means for inwardly oifsetting spaced portions of the extending free end edge of the depressed headed sheet metal container, including outwardly directed narrow die-recesses in said in ternal die elements, means to operate said die elements, a tapered plunger reciprocable centrally of said die elements to expand the same, a wedge member reciprocable to operate said tapered plunger, means for withdrawing said tapered plunger when said Wedge member is in its remote position, outer die elements movable radially to close in on the outside of the headed container opposite said first-named die elements, die profor inwardly offsetting spaced portions of the extending free end edge of the depressed headed sheet metal container, including outwardly directed narrow die-recess means in said internal die elements, outer die elements movable radially to close in on the outside end of the headed container opposite said first-named die elements,

die projection means on said outer die elements to mate with the outwardly directed die recess means on said inner die elements, and means for operating the die elements against the edge of the head of a sheet metal container.

GEORGE M. AMBROSIUS.

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