US1619495A - Upsetting mechanism - Google Patents

Description

R. L. WlLCCDXl UPSETTXNG MECHANI SM Filed Feb. 6, 1922 5 Sheets-Sheetl March l 1927.

R. L. WILCOX UPSETTING MECHANISM Filed F'eb. 6. 1922 3 Sheets-Sheet 2 Patented Mar. 1, 1927.

UNITED STATES 1,619,495 PATENT OFFICE..

RICHARD LESTER WIICOX, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATER- IBUBY FABREL FOUNDRY AND MACHINE COMPANY, OF WATERBURY, CONNECTI- CUT, A CORPORATION OF CONNECTICUT.

UPSETTING MECHANISM.

Application led February 6, 1922. Serial No. 534,539.

My invention relates to new and useful improvements in upsetting or heading mechanisms referring more particularly to mechanism for cutting off and transferring a." blank from the cut o'if or feed 4line to the upsetting line of a heading machine and insuring certainity of loperation thereat.

A'mong the several objects of the invention may be recited the provision of a device` of this character wherein the cnt off mechanism will be positive in its operatlon, will transfer .the blank tothe upsetting line and there hold it until moved by one of the punches andvreturned only after the withdrawal of said punch, to provlde means whereby the alignment of the punch and die will be absolutely relative to each other, to prevent the end of the blank outside of the die from becoming enlarged, 1f so desired, and in these and other ways to so improve the mechanism of upsettingand heading machines that the product thereof is of an exact predetermined size and shape.

To these and other ends, my invention consists in the upsetting mechanism having certain details of construction` and combinations of parts as will be hereinafter described and more particularly pointed out in the claims.

Referring to the drawings in which like numerals of reference designate like parts in the several figures;

Figure 1 is a fragmentary plan view o my improved mechanism shown in connection with a portion of an upsetting or heading? machine; D

igure 2 is a frontview of a portion thereof;

Figure 3 is a transverse sectional view taken generally' upon line 3-3 of Figure 1;

Figure 4 is a view similar to Figure 3,

i but illustrating a modified form of my invention;

Figure 5 is a perspective view of the knife or cutter;

Figure 6 is a front view of one of the bushings;

Figure 7 is an enlarged view ofthe punch and die and adjacent mechanism, with a blank in position to receive its first shaping pressure from the punch; Figure 8 is a similar view showing the relative position tion of such pressure; and Figure '9 is a View of the punch and die after the second shapingpressure and blank in its'iinished form.

In the drawings, 10 designates the frame of an upsetting or heading machine and in one end of which is secured a die block formed in two parts 11 and 42 against a backing plate 12 by means of the wedge plate 13 in a well known manner.

Inl one of the parts of the die block is mounted a bushing 14 having an opening 15' therethrough, and heldin its operative position by a screw 16 or other suitable means.

Movable transversely to the die block is a cut off bar 17 having a' recess 18 at its inner end and adjacent thereto is a sto pin 19 fixed in an arm 20 connected w1th a rod 21.

The numeral 23 designates the punch block which is connected with the punch slide, operatively mounted` upon the gate, as is usual in machines of this character.

Fixed on the. inner yend of the cut off bar 17 is a knife 24 having an opening 25therethrough adjacent to its forward end of subst-antially the same size as the wire from which the blank is cut.

The die 26 is held in the die block by friction between the two partstherein and by the screw 27 or other suitable means, with its front face as in Figures l, 2 and 3 slightly in advance of the face of the die block, or in the modificationshown in Figure 4 slightly in rear thereof and surrounded by a bushing 28* which may or may not project beyond the desirable.

The recess 29 in the die is substantially the same shape as the body and one end of the finished article, which for the purpose of illustration, is shown herein as being the frustum of a cone. I f this form of article is to be produced, it is desirable that the diameter ofthe wire and the blank be substantially the same as that of the finished article, at a point substantially midway between the ends thereof.

In Figures 3, 4 and 8 I have designated by the numeral 3() one -of such blanks after the first upsetting blow thereon. A knockout pin 3l operated in the usual manner is face thereof as may seem.

ros

projected into the die 26, in this case being pointed at its inner end 32 so as to form a depression in one end of the blank.

he punches as usual are held in the vpunch block 23, the first or upper punch 33 having a portion 34-thereon of substantially the same diameter as the wire from which the blank is formed, and a projection 35 on the front end thereof corresponding in shape with that of the pointed end 32 n is surrounded by a bushing 39 which is se-A cured thereto in anyr preferred manner and projects beyond the face thereof.

In operation, the Wire rod is projected by the feed mechanism through the bushing 14 into the openingA 25 in the knife 24, 'until the end thereof abutsagainst the stop pin 19 which is shown in Figure 1 in an out position. The feed mechanism now stops its movement and the c'ut off bar 17 travels toward the center of the die 26, carrying with it the knife 24. During this travel, that portion of the wire rod projecting beyond the face of the bushing 14 is cut off and retained in the opening 25. The blank 40, now in the form shown in Figures 1 and 7, is thus presented in register with the opening or recess 29 ofthe die 26. Thereafter the punch block 23 through the movement of the gate travels toward the die and the portion 34 of the upper punch engages the outer end of the blank 40 pushing it into the die recess 29, which is then shaped substantially as shown in Figures 3 and 4.'

The knife 24 being rigidly held and the portion 34 of the first punch being supported therein during this portion of its movement, the blank is thus registered and maintained in a central position in relation tothe die recess 29 and the axis of the portion 34 is always coincident with the axis of the recess 29. A correct alignment of the first punch as well as the blank is therefore! assured.

The punch block 23 is now withdrawn in a well known manner and the second punch 36 moved so that the axis thereof is now coincidentl with that of the die recess 29.

While the punch block 23 is being withdrawn, the knife 24 is also withdrawn and the opening 25 therein again registers with the opening 15.

While the knife is being withdrawn and is in its retracted position, the die block 23 again moves forwardly and the outer end of the die 26 enters the overhanging or projecting portion of the bushing 39, thus centering the second punch with said die, which further upsets the blank and produces the completed and finished article 45. Upon the next withdrawal of the punch block 23 the blank is ejected by the knockout pin 31 in a well known manner.

By the mechanism above described the blank is forme-d with depressions in the opposite ends thereof, which are concentric with the axis of the blank, owing to thel Aa bushing 41 is fixed in the die block below the die 26, thus in operation additional means are provided for insuring the positive valignment ofthe first punch with the die 2.6V other than the knife 24, this being accomplished by the entran-ce of the second punch 36 into the bushing 41. The bushing 28 is held rigid by being clamped between the parts 11 and 42 of the die blockV and the screw 27 projects through a slot 43 in one side thereof.

When the first punch is in engagement with the blank the second punch is in engagement with the bushing 41 and when the second punch is in engagement with the blank, it is held in positive alignment, by the bushing 28.

'A solid instead of a twol part die block may be used with my invention, if desired. If the outer end of the bushing 28 projects into the path of the knife 24, a slot 44 is formed in one wall thereof and through j which the knife passes during its travel, in a well known manner.

As the blank is forced out of the knife'by the upper punch 33 it brings up on the taper of the recess 29 inthe die before it is pushed entirely out of the knife, so that the pressure of the upper punch 33 forces the Inaterial of the blank into the recess and the opening inthe knife prevents the blank from enlarging. This is illustrated in Figure 7 wherein the inner end of the blank has just engaged the walls of the recess 29 in the die and the diameter of the outer end of the blank is still substantially the same' as that o'f said opening.

While I have shown my device as ap lied to a two blow upsetting or heading mac ine,

it is obvious that it will operate equally .as

tion herein shown and1 described, but claim therein, a punch, holding means interpose between the die and.punch and havin an punch so as to initiall openin of a diameter substantially equa lin that o the blank to receivethe blank `an the punch therein, and means to operate the cause the blank to enter the die opening w ile supported by the holding means so that the latter prevents enlargement of that part of the blank held therewithin' durin partial shaping of the blank in the die, t ereby to prevent the formation of an air pocket between the die and blank, and to finally move the blank out -of the holding means and substantially completely into the die 'o ening.

2. In a machine or co d shaping blanks into substantially fusto-conical form, a die having a conical blank receiving opening therein, a punch, -a combined lblank cutter and support interposed between the die and punch andhaving an opening of a diameter substantiall e ualling that of the blank to receive the blaiik and the punch therein, and means to o erate the punc so as to initially cause the bank after cuttin thereof to enter the die opening while the lank is held by the support so that the latter prevents enlargement of that part of the blank h eld within the support durinlg partial shaping of the blank in the die t ereby to prevent the formation of an air pocket between the die and blank, and to finally move the blank out of the support and substantially completely into the die opening.

3. In a machine for cold shaping blanks into substantially frusto-conical form, a diehaving a concial blank receiving openingf therein, a punch, holding means interposed between the die and punch and having an opening of a diameter substantially equalling that of the blank to receive the blank and the punch therein, and means to operate the punch so as to initially cause the blank to enter the die opening while supported by the holding means so that the latter prevents enlargement of that part of the blank held therewithin durin partial shaping of the blank in the die, t ereby to prevent the formation of an air pocket between the die and blank, and to finallyinove the blankI out of the holding means and substantially coinpletely into the die opening, said holding means being formed so as to support the blank until ythe latter has been suiicientlyl shaped in the die to' support itself in the latter. l

4. In a machine for cold shaping blanks into substantially frusto-conical form, a die having aconical blank receiving opening therein, a punch, a combinedblank cutter and support interposed between the die and punch and having an opening of a` diameter substantially equalling that of the blank to receive the blank and the punch therein, and

means to operate the punch so as to initially y cause the b ank after cutting thereof to enter 4the die opening while the blank is held by the Support so that the latter revents enlargement of that art of the b ank held within the support uring. partial shaping of the blank in the die thereby to prevent the fori mation of an air pocket between the die and blank, and to inally move the blank out of the support and substantially completely into the die opening, said combined cutter and support being formed so as yto support the blank until the latter has been sufficiently shaped in the die to support itself in the latter.

5. In'a machine for cold shaping blanks, a die havin a blank receiving opening therein, a punc a combined blanky cutter and support interposed between the die and punch and having an opening defined by a continuous wall and of a diameter substantially equalling that of the blank to receive the blank and-the punch therein, and means to operate the punch so as to initially cause the blank after cutting thereof to enter the die opening while the blank is held by the support `so that the latter prevents enlargemerit of that part of the blank held Within the support in all directions radially of the blank during partial shaping of the blank in' the die thereby to prevent the formation of an air pocket 'between'the die and blank, and to finally move the blank out of the support and substantially completely into the die opening.

In testimony whereof, I have hereunto affixed my signature.

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