close

Вход

Забыли?

вход по аккаунту

?

код для вставки
Jan.~7, 1947.
A, BQLDUC
_
`
DIE REMOVING DEVICE
FíledJuly l13, 1944
Í
2,413,943
Patented Jan. 7, 1947
42,413,943
UNITEDSTATES PATENT orlucr.N
2,413,943
DIE REMOVING DEVICE
Albert Bolduc, Detroit, Mich.
Application July 13, 1944, Serial No. `544,792
.
1
(ci. 164-418)
8 Claims.
`
2
.
The invention relates generally to dies adapted
to cooperate with punches for perforating sheet
u tion, illustrating apparatus constructed accord
ing to one form of the invention.
Fig. 2 is a partial view of the apparatus shown
by Fig. l, illustrating the parts at a different stage
ñtted in place.
Cl in the die-withdrawing operation.
Fig. 3 is a cross-sectional View taken substan
In connection with apparatus for perforating
metal or the like, and it has particular relation
to a device for removing dies that are press
sheet metal or the like, it is conventional to use
a female die element and a punch, and these are
tially along the line 3-3 of Fig. l. ‘
Fig. 4 is a cross-sectional view taken substan
tially along the line 4-4 of Fig. 1.
respectively anchored on relatively movable parts
Referring to Fig. 1, the mechanism illustrated
of the machine or apparatus. With respect to 10
comprises an upper `platen l0 having a punch
the punch in particular, it is usual to have the
holder or block ll which is secured by machine
punch releasably mounted so that one punch may
be substituted for another, and one form of re
leasable connecting means comprises a spring
pressed ball which is adapted to seat in a groove
or recess in the punch. When it is desired to re
move the punch, it is only necessary to move the
ball out of the recess and then the punch may be
screws i2 to the platen.
The block or holder H
has an opening I4 which is adapted to receive'a
punch, not shown, and for releasa‘cly holding the
punch in position a spring-pressed ball device is
employed, This device comprises a ball I5 mov
able in an opening or bore IS in the block and
which is normally urged towards the opening M
The same type of releasable connection may be 20 by a spring Il. The ball engages a groove or re
cess in the punch, and upon upward movement
employed for holding the female die in place, but
of the punch the ball through a wedging action
in many instances such connections are Ilot used.
withdrawn.
Instead of using this type of connection, the
prevents the punch from being pulled out. For
female die is press-fitted in an opening in a
die-holding element, and then when it becomes ._
the purpose of pushing the hall upwardly when
the punch is to he removed, a pin may be moved
upwardly through a small opening I8 in the bot
tom of bore it. This type of punch holding de
vice is disclosed in Richard Patent No. 1,621,811.
necessary to remove the die, the holding element
must be removed and then the die is pushed out
of its opening by any kind of suitable pushing
instrument powerful enough for this purpose.
This necessarily requires `time and effort.
One object of the present invention is to pro
vide a device for removing the female die from
its holding element without requiring removal of
the latter, so as thereby to save considerable
time and effort formerly required in removing
the die.
Another object of the invention is to provide
an improved device for removing the female die
which can be substituted for the punch element
and then used as part of the machine for re
moving the female die during the withdrawing
movement of the punch support. `
f
.
And, in general, it is an object of the invention
to provide a device which maybe quickly and
easily used for removing the female die without
requiring removal of the holding element there
for.
. The lower part of the mechanism comp-rises a
base 26 having a ‘clock 2l releasably fastened by '
devices 22 and a die block 24 fastened by machine
screws 25 to the block 2l. The female die is indi
cated at .25, and is sumciently press-iitted in an
opening 27 inthe block 25 that normally it will
be removed by any forces occurring during
withdrawal of the punch. It is to be noted that
the die, as shown, has an opening lißthrough
which the punch operates, and that below this
opening a larger diameter 29 is provided and that
at the junction of the` two diameters a slightly
rounded annular shoulder 3G is present.
The device constructed according to the present
invention comprises a sleeve 35 having a recess
3S for engagement with the ball l5, so that the
sleeve may be inserted in place of the punch. A
_second part of the device comprises a pin ¿il
which has an axial groove or slot 39 at its upper
Vend and a circumferen-tially extending groove t!)
Other objects oi‘ the invention will become ap
intersecting the‘axial groove. The pin S8 is re«
parent from the following specification, from the 50 leasably held in the sleeveläo by means of a pin
drawing relating thereto, and from the claims
4i extending crosswise of the sleeve and engaging
hereinafter set forth.
the opening in the pin. The axial slot 39 has. a
For a better understanding of the invention,
flat bottom, as indicated atAZ of Fig. 3, and it
reference may be had `to the drawing, wherein:
should be evident thatV when the pin 33 is turned
Figure l is a vertical view, partly in cross sec- '
to one position, it maybe either inserted or with
2,413,943
3
4
drawn past the pin 4I . However, when the pin 38
has been inserted, as seen in Fig, 2, and then is
tainer and releasably locked thereto in place of
the punch, whereby a withdrawing movement of
fthe retainer through operation of the machine
turned, the pin 4| becomes interlocked with the
groove 40, as shown in Fig, 3, and then the pin
may be used to remove the die.
38 is held in the sleeve.
2. In a machine having an apertured die held
u
'I'he lower end of the -pin 38 has a frusto
in the opening in a holder and a reciprocatory
conical head 45 terminating in a cylindrical wall
member adapted to carry a punch co-operable
46 which is slightly smaller than the opening 28
with the die, a device for removing the die from
in the female die, so that it may readily be moved
through it. Between the end of the sleeve 35 and
the frusto-conical surface on head 45, a split ring
41 is provided, and this ring is so arranged and is
of such resilient character that it normally is
slightly larger in outer diameter than the die
opening 28. Also, in its normal condition, its
inner diameter is slightly smaller than the outer
diameter of the sleeve 35 and smaller than the
cylindrical surface 46, so that it cannot slide up~
the holder and comprising shank means adapted
to be connected at one end to the member in place
of the punch, and means on the other end of the
shank means adapted to enter the die aperture
and automatically to expand after insertion so
as to engage the die and withdraw the latter when
the member is moved away from the die holder.
3. In a machine having an apertured die held
in the opening in a holder and a reciprocatory
member adapted to carry a punch co-operable
wardly over the sleeve or downwardly over the
with the die, a device for removing the die from
.head 45.
the holder and comprising shank means adapted
With the sleeve 35 and pin 38 attached to the
to be connected at one end to the member in
upper block Il, the upper platen l0 is allowed lto
place of the punch, and means on the other end
move downwardly, and during this operation the
of the shank means adapted to ñrst radially con
head 45 on pin 38 moves downwardly through
tract and enter the die aperture as the member
the opening 28 in the die 26, and the split ring 25 moves toward the holder and then to expand ra
41 contracts as it moves into the o-pening 28. As
dìally to engage the die and Iinally to withdraw
soon, however, as the ring passes completely
the die from the holder upon a reverse movement
through the opening 28, its inherent spring action
of the member.
causes it to expand again, and then it assumes a
4. In a machine having a die holder and an
position in contact with the shoulder 38, as 30 apertured die held in an opening in the holder,
seen in Fig. 1. Now as the platen I0 is moved upshank means insertable endwise into the die aper~
wardly, the split ring 41 becomes wedged between
ture, means on the insertable end of the shank
means adapted to enter the die aperture and
the shoulder 30 and the frusto-conical surface of
then automatically expand radially to engage the
head 45, and as a result the female die 26 be
comes positively vinterlocked with the pin 38.
die, and a member connected to the other end of
Further upward movement of the platen l0 now
the shank means and which is reciprocatory to
causes the pin 38 to pull the female die 26 out of
wards and from the die in order ñrst to move
its opening, and this will occur even though the
the shank means into the die aperture and then
die is strongly press-fitted in the opening.
,
upon reverse movement to withdraw the die from
As soon as the die is withdrawn, the sleeve 35 40 the holder.
5. A device for pulling a die element out of a
and pin 38 may be removed from the block I I and
holder wherein the element has a die opening
then the pin may be removed from the sleeve
which terminates inwardly in a, surface of larger
35, and this allows the die 26 to be separated from
diameter, which comprises a shank adapted to be
the pin. It is evident that by turning the pin
38 relative tothe sleeve 35, the pin may be pulled tp. inserted into the opening, an enlarged head on
the insertable end of the shank and which has a
out of the sleeve and hence pulled out of the die
conical surface merging into the shank body, a
that has been removed, and then the split ring
fixed collar on the shank adjacent the smaller
will fall out of the die opening.
end of the conical surface, and a resilient radially
It might be noted that the ring 41, as well as
other parts of the device, may be constructed of 50 expansible and contractible ring element slidable
i
metal suitable for the purpose, and that in par
on the shank between the conical surface and the
ticular the head 45 will be sufficiently hard alone`
with the ring that the female die will be posi
fixed collar and which is capable of sliding be
tween such surface and collar when the shank is
tively removed. Any suitable spring wire or ma
inserted into the die opening so as to permit the
element to be moved by the collar and to radially
chined spring steel ring may be used, as will be
contract about the shank as the element is moved
evident to those skilled in the art.
through the opening by the collar and to expand
Although only one form of the invention has
and be anchored against the conical surface when
been illustrated and described in detail, it will be
the shank is moved in the reverse direction.
apparent to those skilled in the art that various
6. A device for pulling a die element out of a
modifications may be made without departing 60
holder wherein the element has a die opening
from the scope of the appended claims.
which terminates inwardly in a surface of larger
What is claimed is:
diameter, which comprises a shank adapted to be
1. A device for use in removing a die element
inserted into the opening, an enlarged head on
having a die aperture from the opening in a
holder in a metal punching machine having a 65 the insertable end of the shank and which has a
surface of reduced diameter next to the shank
reciprocable punch retainer, a punch, and re
body, a fixed annular collar on the shank adja
leasable means to lock the punch in the retainer,
cent the surface of reduced diameter, and a re
wherein the device comprises shank means
silient radially expansible and contractible ring
adapted to be inserted into the die aperture,
means on the insertable end of the shank means
element slidable on the shank between the collar
and said surface of reduced diameter and which
which is radially expansible to engage the die
element in order to remove the latter from the
holder when the shank means is withdrawn, and
is capable of sliding between such surface and
collar when the shank is inserted into the die
means on the other end of the shank means
opening so as to permit the element to move to
75 wards the collar and to radially contract about
adapting the latter to be connected to the re
2,413,943
5
the shank as the element is moved through the
6
`
~
opening by the collar and to be expanded and
which terminates inwardly in a surface of larger
diameter, which comprises a shank adapted to be
anchored against the head when the shank is
inserted into the opening, an enlarged head on
moved in the reverse direction.
7. A device for pulling a die element out of a
the insertable end of the shank, ñxed shoulder
holder wherein the element has a die opening
which terminates inwardy in a surface of larger
diameter, which comprises a shank adapted to be
inserted into the opening, an enlarged head on
the insertable end of theV shank, ñxed shoulder
abutment means on the shank adjacent the head
but spaced therefrom, and a resilient radially ex
pansible and contractible ring element on the
shank between the head and abutment means and
having an axial length substantially less than the
distance between the head and abutment means
so that the element can move along the shank,
the abutment means being adapted to force and
simultaneously cause contraction of the element
through the die opening when the shank is in- „
serted into the opening and the head being
adapted to anchor against the element when the
shank is reversely moved and the element has eX
abutment means on the shank adjacent the head
but spaced therefrom, and a resilient radially ex
pansible and contractible ring element on the
shank between the head and abutment means and
having an axial length substantially less than
the distance between the head and abutment
means so that the element can move along the
shank, the abutment means being adapted to
force and simultaneously cause contraction of the
element through the die opening when the shank
is inserted into the opening and the head being
adapted to anchor against the element when the
shank is reversely moved and the element has ex
`banded against the die surface of larger diame
ter, said ring element having its outer peripheral
surface next to the head sloping to smaller di
ametrical dimensions so as to cause the element to
contract into the die opening when the sloping
surface is pressed axially against the edge of the
opening.
panded against the die surface of larger diameter.
8. A device for pulling a die element out of a 25
holder wherein the element has a die opening
ALBERT BOLDUC.
Документ
Категория
Без категории
Просмотров
0
Размер файла
504 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа