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Патент USA US3026608

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March 27, 1962
ca. A. LYON
3,026,598
MEANS FOR HEADING STEEL SHELLS
Original Filed April 26; 1955
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United States PatentO " ice
Patented Mar. 27, 1962
1
tween and connecting the thickened annular portions of
3,026,598
MEANS FDR HEADING STEEL SIELLS
George Albert Lyon, Detroit, Mich, assignor to Lyon
Incorporated, Detroit, Mich., a corporation of Dela
the base wall is a circular thin portion from which ma
terial has been displaced into the annular thickened por
tions by cooperative action of opposing annular coactive
forming ribs 71 and 72 on and spaced a limited distance
from the perimeters of respectively the nose end heading
Original application Apr. 26, 1955, Ser. No. 504,015.
Divided and this application July 30, 1958, Ser. No. ' face of the heading block 65 and the heading end portion
face of the heading die 69. For accommodating the tip
751,977
portion of the heading nipple 68 a clearance recess 73 is
1 Claim. (Cl. 29-131)
10 provided in the central portion of the die member 69.
As will be apparent in the drawing, the central recess 67
The present invent-ion relates to improvements in
is of limited depth and of a substantially smaller diameter
means for making steel shells, especially of the large
than the adjacent diameter of the rib 71, and the heading
bomb head or guided missile variety.
nipple 68 which is mounted in the recess 67 has a por
The present application is a division of my application
15 tion of substantial length projecting beyond the punch
Serial No. 504,015 ?led April 26, 1955.
heading face and tapering substantially smaller toward
An important object of the present invention is to pro
its tip. All of the clearance recess 73 centrally in the
vide improved apparatus for work hardening a base end
die block heading face and particularly the lower and
portion of a drawn steel shell.
smaller end thereof is of substantially smaller diameter
Another object of the invention is to provide improved
20 than the punch face recess 67 and substantially comple
means for cold work heading a drawn shell.
men-tary to the tapered portion of the heading nipple 68
A further object of the invention is to provide a novel
to abuttingly receive the tapered portion after it has
heading die and punch structure.
been forced through an originally smaller opening in a
Other objects, features and advantages of the present
shell base wall to enlarge the base wall opening by radially
invention will be readily apparent from the following
detailed description of a preferred embodiment thereof 25 outward displacement of material of the base wall lying
against the heading face of the die block 69. The bottom
taken in conjunction with the accompanying drawing in
of the clearance recess '73 opens into a clearance passage
which:
74 for evacuation of air from the clearance recess. The
The single FIGURE is a fragmentary vertical sectional
heading face of the die block 69 immediately surround
view through a cold heading apparatus, showing a drawn
ing the clearance recess 73 supports the base wall 44 of
steel shell in the apparatus at the conclusion of the head
the shell about the opening 37 in the shell base wall
ing operation.
against substantial displacement into the clearance recess
A steel shell 15 is drawn from suitable steel material
‘73 while the tapered portion of the heading nipple 68
to provide a tubular side wall 45 of predetermined inside
Ware
enlargingly displaces 'material radially in the base wall
and outside diameter with a central aperture 37 in a
substantially thicker base wall 44. At its open end the 35 44. The ribs 71 and 72 are coactive to displace material
in the base wall 44 at the radially inner sides of the ribs
shell has a thickened collar 47 provided with an external
coactively with the radially outward displacement ef
bevel 48 joining the outside diameter of the shell wall 45.
fected by the tapered portion on the heading nipple 68.
As drawn, the base wall 44 may be of ?at or concave
While heading of the base wall 44 as described hardens
convex substantially uniform thickness and the central
aperture 37 will be of a limited diameter, having served 40 the material to a certain extent, the hardness thereof will
not, of course, be as great as that of the cold worked
as a pilot hole in the base wall.
drawn side wall 45.
The apparatus of the present invention, comprising a
Following the heading operation, the heading punch
heading die assembly 58 acts to cold work shape and
form the base wall 44. To this end, a heading plunger
assembly 59 is backed off from the die assembly 58 and
or punch 59 carried by a reciprocable ram 60 is engage 45 the die member 69 is movable upwardly through the die
bore 62 for stripping the headed shell from the die.
able within the shell 15, while a die structure including
It will be understood that modi?cations and variations
a die block 61 provided with a bore 62 receives the base
may be effected without departing from the scope of the
end portion of the shell closely. By preference, the punch
59 includes a plurality of separable, stacked cylindrical
shank blocks 63 of smaller outside diameter than the in 50
novel concepts of the present invention.
I claim as my invention:
In a heading die assembly for shells, a die block pro
side diameter of the shell wall 45 and held in assembly
vided with a bore closely receptive of the base end por‘
with the ram 60 by means of a centrally extending bolt
tion of a shell to hold the same against spreading, a re
64 which at its threaded extremity is secured into a head
ciprocable die block slidably operable in said bore and
ing terminal block 65 of a diameter to ?t closely within
55 having a heading face disposed to oppose the outer side
the shell wall 45 adjacent the base wall 44.
of the base wall of the shell, a reciprocable punch of a
Mounted within a central downwardly opening recess
diameter to ?t closely in the base end portion of the shell
67 in the tip end of the hardened heading block 65 is a
and having a heading face to engage the inner side of the
hardened taper nosed heading nipple 68 adapted when
base wall of the shell, the respective die and punch head
the heading punch is driven into the shell and toward a
reciprocable heading die block 69 in the lower end of the 60 ing faces having opposing respective annular coactive
forming ribs projecting therefrom and spaced a limited
die bore 62 to project into and enlarge the base wall per
distance from the perimeters of the faces, said punch face
foration or opening 37 of the shell by radially outwardly
having a central recess of limited depth and a substan
displacing the material of the base wall.
t-ially smaller diameter than the adjacent diameter of the
Cold working of the shell base Wall 44 by the heading
effected between the heading face of the heading punch 65 rib on the punch face, a hardened heading nipple mounted
in said punch face recess and having a portion of substan
block 65 and the heading face of the die block 69, with
the heading nipple 68 cooperating therewith, redistributes
the material of the base wall 44 into an annular mass of
tial length projecting beyond the punch face and tapering
substantially small toward its tip, said reciprocable die
block face having a clearance recess centrally therein,
substantial cross-section in line with the side wall 45 of
the shell and a central annular thickened portion 70 that 70 all of said clearance recess and particularly the lower and
has the central opening 37 thereof substantially enlarged
and tapered conform-able to the heading nipple 68. Be
smaller end thereof being of substantially smaller diam
eter than said punch face recess and substantially com
3,026,698
3
plementary to said tapered portion of the heading nipple
to abuttingly receive the tapered portion after it has been
forced through an originally smaller opening in a shell
base Wall to_ enlarge the base wall opening by radially
outward displacement of material of the base wall lying
against said reciprocable die block face, the bottom of
4
References Cited in the ?le of this patent
UNITED STATES PATENTS
346,759
1,006,263
1,063,574
1,139,666
1,386,726
for evacuation of air from said clearance recess, said
1,560,135
face of the reciprocable die block immediately surround
ing the clearance recess supporting the base wall about 10 2,014,605
2,183,637
the base wall opening against substantial displacement
2,349,970
into the clearance recess while said tapered portion of the
2,748,465
heading nipple enlargingly displaces material radially in
said clearance recess opening into a clearance passage
the base wall, said ribs being coactive to displace ma
terial in the ‘base wall at the radially inner sides of the 15
ribs coactively with the radially outward displacement
etfected by said tapered portion on the heading nipple.
Lorenz _______________ __ Aug. 3,
O’Leary ______________ __ Oct. 17,
Monnot ______________ __ June 3,
George ______________ .._ May 18,
1886
1911
1913
1915
Paque ________________ .._ Aug. 9, 1921
Bell _________________ .._ Nov. 3, 1925
Zimmerman __________ _._ Sept. 17, 1935
Biginelli _____________ __ Dec. 19, 1939
Lambeek ____________ __ May 30, 1944
Bodinaux _____________ .._ June 5, 1956
FOREIGN PATENTS
507,564
117,514
Belgium _____________ .._ Dec. 31, 1951
Great Britain __________ __ July 25, 1918
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