US2533922A

US2533922A - Die

Info

Publication number: US2533922A
Application number: US34003A
Authority: US
Inventors: Deichmiller Alwin; Edmund F Shalla
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1948-06-19
Filing date: 1948-06-19
Publication date: 1950-12-12
Anticipated expiration: 1967-12-12

Description

1950 A. DEICHMILLER ETAL 2,

DIE

Filed June 19, 1948 INVENTORS I A. DE/CHM/LLER EFSHALLA BY j A 7' TORNEY Patented Dec. 12, 1950 DIE Alwin lieichmiller and Edmund F. Shalla, Pasadena, Md, assigncrs to Western Electric Company, incorporated, New York, N. Y., a corporation of New York application June 19, 1948, Serial No. 34,003

3 Claims. 1

This invention relates to dies, and more particularly to sectional dies for material punching operations.

An object of the invention is the provision of new and improved dies.

A further object of the invention is to provide new and improved sectional dies for material punching operations.

Another object of the invention is to provide new and improved sectional dies which are held tightly together on platens.

A die illustrating certain features of the invention may include a sectional die element having a portion tapering from one face thereof to the opposite face thereof, and a clamp being provided with arms complementary to said portion of the die element, whereby the sections of the die ele ment may be wedged together by the clamp.

A complete understanding of the invention may be obtained from the following detailed description of a die forming a specific embodiment thereof, when read in conjunction with the appended drawing, in which:

Fig. 1 is a plan View or" a die forming one embodiment of the invention, and

Fig. 2 is a fragmentary, vertical section taken along line 22 of 1.

Referring now in detail to the drawing, a die H] is provided with a pair of die apertures l2 and it formed in sections it, ii and it, which are held against longitudinal movement relative to one another by keys and 22. Cap screws 2 t2 l threaded into tapped bores 26 25 formed in a platen 23 secure the die it to the platen 28 after the sections it, it and it of the die iii are wedged tightly together by the action of dovetailed clamps 3 33&, which are provided with wedge surfaces 32-32 acting against wedge surfaces 3--3l formed on the sections it and it of the die Hi. That is, there is a compound taper on the clamps and the die so that the clamps cannot work free of the die accidentally. The die holds the clamps against the platen, and the dovetailing prevents the clamps from sliding off the ends of the die.

The die It} and the clamps fit-38, which are movable with the die iii as a unit, may be released from the platen it merely by unscrewing the cap screws 2 i-2l The die Hi may be disassembled from the clamps til-39 merely by tapping the clamps 3.isli or the die sections It and IS in directions such as to lessen the wedging action between the clamps 3ii-3 il and the die It. Hence, the die it may be easily disassembled for maintenance operations thereon that may be r needed.

The die sections it, i? and it are easily assembled in close relationship merely by tapping the die sections into the clamps til-3t. The die and the clamps then are mounted on the platen,

and the die sections l6 and it are bolted to the platen 28. The clamps lid-3t force the die sections I6 and I8 tightly against the die section ll so that the sections IE, it and is lit tightly together and are always spaced the same after each maintenance operation in which they are removed from the clamps Ee -3s and replaced therein.

A clamp, such as the clamps (iii-38, may be used to repair a cracked die merely by forming portions complementary to the compoundly tapered clamp at the edge of the die and bracketing the crack in the die so that the clamp is locked to the die and presses together the portions of the die on opposite sides of the crack.

What is claimed is:

1. A die, which comprises a platen, a sectional die having male dovetailed end portions bracketing the juncture between the elements of the sectional die, said die having a noncircular die opening intersecting the juncture of the elements thereof, a pair of clamps having female dovetailed portions complementary to the dovetailed portions of the die for clamping together the sectional elements of the die, and means for securing the die to the platen, the dovetailed portions of the clamps and the die being wedgeshaped in planes substantially transverse to the plane of the die and in such directions that the die locks the clamps to the platen.

2. A die, which comprises a platen, a die element having a split therein extending from one end to the other end, said die element having male dovetailed portions bracketing the ends of the split and also being provided with a noncircular die opening intersecting the split therein, a pair of clamps having female dovetailed portions complementary to the male dovetailed portions of the die element for clamping toge trier the portions of the die element on opposite sides of the split, a key for keying the portions of the die element against movement relative to one another along the split, and means for securing one of the die element and the pair of clamps to the platen, the dovetailed portions of the die element and the clamps being wedge-shaped in a plane substantially transverse to the plane of the die and the direction of wedging being such that the one of the die element and the pair of clamps that is secured to the platen locks the other to the platen, the clamps and the die element being so constructed and arranged that there is clearance between the ends of the arms of the clamps and the die element and the ends of the die element abut the portions of the clamps between the arms thereof when the clamps are in locking positions on the die element.

3. A die, which comprises a platen, a die element having a split therein extending from one end to the other end, said die element having male dovetailed portions bracketing the ends of the. split and also being provided with a noncircular,

.die element for clamping together the portions of the die element on opposite sides of the split, a key for keying the portions of the die element against movement relative to one another along the split, and means for securing the die element to the platen, the dovetailed portions of the die element and the clamps being wedge-shaped in a plane substantially transverse to the plane of. the die and the direction of wedging being such that the die element locks the clamps to the platen, the clamps and the die element being so constructed and arranged that there is clearance between the ends of the arms of the clamps and the die element and the endsof the die element abut the portions of the clamps between the arms thereof when the clamps are in looking positions on the die element. 7

ALWIN DEICHMILLER. EDMUND F. SHALLA.

REFERENCES CITED The following references are of record in the file of this patent:

Number 00 Number 223,201

UNITED STATES PATENTS Name Date Coleman et a1 Oct. 24, 1893 Knudson Mar. 1'7, 1903 Lewis Apr. 4, 1905 Schwartz Apr. 26, 1910 Noteboom Apr. 7, 1925 Lahr June 19, 1945 FOREIGN PATENTS Country Date Great Britain Jan. 15, 1895