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Патент USA US2106213

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Jan. 25, 1938.'
C. „5. MÀLBÜRG
2, 106,2 1’3
BRoAcHïNG MACHINE
Fileä Ápril 19, 1935
/6
ng.4,6/4
2,5?
Patented Jan. 25, 1938
`
‘
2,106,213
_UNITED v4sra'l‘iazs FaraoniI er1-‘Ice
- 2,106,213
BnoAomNG MACHINE
can .1. nalborg, Detroit, Mich.,_assignor to oo
lonial -Broach Company, a corporation o!
Michigan
Appi'ication Api-11 1s, 193s, serial No. 11,198
9 claims.y (o1. sie-_33)
The present invention relates to machines for
economical of manufacture, and accurate and
operating metal werking tools, and particularly
positive in operation.
to machines arranged to provide an. automatic
operating cycle fer a breaching tool used to ma
present invention . will be. either speciñcally
pointed out or will become apparent when re
5 chine an aperture.
In accordance with the invention disclosed and
.
Other objects and features of novelty of my
ferring, for a. better understanding of my inven- ’
tion, to the following descriptientaken in con
claimed in the copending application of Richard
A. Thompson, Serial Number 35,693, filed August
7, 1935, and assigned te the assignee of the present
junction with the accompanying drawing, where
invention, the initiation o-f a breaching opera
tion, of an illustrative embodiment of the present
tion is controlled manually while the sequence of
various subsequent -operations is entirely auto
matic.v Upon the actuation of a manual control
means, the breaching machine engages the
breaching tool, with respect to which the Work
piece may have previously been positioned, draws
it through the opening in the werk, and there
after returns and releases the breach. The mo
tien of the breaching machine head, which en
gl) gages the breaching tool, is reciprocating in char
‘ acter.
At the conclusion of each breaching op
eration, the breaching head is automatically
stopped at a loading point intermediate the ends
of its path of motion. AtI the beginning of each
breaching operation, the head moves to one ex
treme of its path of travel, engages the breaching
in:
'
Fig. 1 is a view in side elevation, partly in sec
10
invention;
Fig. 2 is a view in side elevation, partly in sec
tion, of a breaching head which -may be used in
the practice of the present invention, and illus 15
trating the positioning of the parts when »the
machine is in readiness to begin the drawing >of
the breach through the work piece; and,
Fig. 3 i‘s a. view corresponding in general to Fig.
2, but showing the positioning of the parts during
the course of the drawing of the-breaching tool
through vthe work piece.
-
Referring generally to the several figures .of the
drawing, the illustrated embodiment ofthe pres
ent invention comprises a frame I0, formed with
two _stationary bed plates II and I2 which are
disposed to support a work piece I3 at different
tool, and is automatically reversed and restarted y stages of a breaching operation; a breaching head
in the vopposite direction.
The - release ‘of the
breaching tool occurs after Athe breaching ma
chine head has travelledto the opposite extreme
I4, which is reciprecated by suitable hydraulic
mechanism comprising a movable piston cham
ber I5, a. stationary piston I6 and associated
mechanism, later described; a' resilient base I-‘l
ef its path of travel, automatically reversed, and
returned tothe loading peint. The present in ` for supporting and-receiving a breach I8 upon
ventien is concerned primarily with the provision ` release thereof by breaching head I4; and suitable
of an improved construction of breaching head electro-mechanical control apparatus illustrated - 35
and control means therefor, and which is particuf asv comprising a manually operable switch I9 and
lary adapted for use in practicing the invention of related elements described more in'detail herein- y `
the above identiñed Thompson application.
Accordingly, the principal objects of my in-Iv
after.
.
» ’ Considering the above mentioned elements more
ventien are: te provide a, breaching machine . in detail, breaching head Il, whichis ¿secured te
4o having a head which engages and releases the tool chamberl I5 by` bolts 2li, comprises a. hollewed out
during a cy'cle of movement; to provide an im ’ cylindrical shank 2|; a'support 22 slidably ñtted
proved breach head particularly adapted for- use
in a breaching machine provided with con
4
trol mechanism which moves the head to grasp
the breach, returns to pull the breach through
the work and again returns and releases the
breach; to provide fingersen the head-*which en
gage the breach and lock the breach thereto;
,5
within member 2I;' and an _outer sleeve 23, the
lower end 2l of which is ñnished `with laterally
extending shoulders 25 which engage bed plate
II and which terminates in a. dat surface 26
against which work _piece I3 bears during the
course of a breaching operation.
-
Support 22 is hollewed out, and is provided with
to provide control means which operates‘the head
two diametrically opposed longitudinal openings.
to seize the breach, te reverse the movement of
the head, to again reverse such movement and
pins 28, ,Pins 28 are connected together by a ,
to receive-two clamps 21, journaled therein en
stop and release the breach at the initial'point
toggle connection comprising arm 3I‘and a com
of movement; to` provide such a breaching ma
connection biases arm I_I to occupy either the 55
55 chine which is of relatively simple construction.
pression spring 32. As will be understood, `this
2
2,108,218
position illustrated in Fig. 1, or the position' shown '
Push button I9 is preferably located for con
in Figs. 2 and 3. Clamps 21 are formed with inner venient operation by the operator of the machine,
shoulders 33, disposed to engage a cooperating and switch 93 is arranged for actuation by an arm
shoulder 34 formed at the upper end of broach 94, and a cam 95 formed on chamber I5. Switch
I8, and with sloping outer shoulders 35, disposed
to enter cooperating recesses 36 formed in shank
I.
The outwardly turned ends 40 of clamps 21 ex
tend through longitudinal openings 4I formed in
shank 2|, and enter longitudinal _ recesses 42
formed in sleeve 23.
Cams 43, disposed to actuate clamps 21 under
certain hereinafter described conditions, are piv
93 normally occupies the closed position, but may
be actuated to the illustrated open position du1‘«
ing downward movement of chamber I5, by the
engagement between cam 95 and the roller 96 as
sociated with arm 34. In response to this engage
ment, arm 94 is rotated about pin 91, and moves
switch 93 upwardly.- The engagement of cam 95
with roller 96 has no effect on switch 93 during
upward movement _of chamber I5 since, under
these conditions, the consequent rotation of arm
otally mounted by pins 44 in longitudinal open
ings 45 formed in sleeve 23. The mounting of . 94 is in a direction away from switch 93. Spring
cams 43 is such that limited rotation thereof in 98 biases arm 94 to a horizontal‘position.
one direction is possible, but rotation thereof in
Member I1, which as mentioned supports
the opposite direction is prevented by shoulders broach I8 when in the released position, comprises
46.
a cylindrical member |00, hollowed out to receive
20 . Spring 5I, which surrounds sleeve 23, is seated
a compression spring IIlI , and slidably ñtted in a il()
between recess 55 formed in bed plate II, and a cooperative cylinder |02.
member 56 threaded to member 23, and resiliently
With reference to the operation of the machine
_supports sleeve 23 on bed plate II. Support 22 as a whole, the parts are illustrated in Fig. l in
_is slidably supported in shank 2| by a pin. 52, the positions occupied thereby when a broaching
suitably journaled in shank 2l, and which passes operation is to be begun, work piece I3 being
througha slot 53 formed in support 22. A shown as ñtted over the end of broach I8 and
compression spring 54, stronger than spring 5I, supported upon bed plate I2. It will be under
is freely seated between members 2| and 22 stood that while the positioning of piece I3 with
andV influences 'the relative positions thereof respect to broach I8 is illustrated as accomplished
30 under certain conditions as hereinafter de
simply by fitting it over broach I8, other position
scribed.
‘
Sleeve 23, provided with an opening 60,
through which broach I8 passes, is also provided
with an annular recess 6I which receives the
lower ends of shank 2|, and with an annular
ing means may be employed. .,
Y Closure of push button liîlcompletes a circuit'
for solenoid 92‘which extends from the positive
terminal of a suitable source of power through
conductor IIO and solenoid 92 to ground. Upon
shoulder 62, which- provides a bearing surface completion of this circuit, solenoid 92 moves valve
for ‘the lower end of member 22, under certain 99 to the open position and closes contacts 94.
hereinafter described conditions of operation.>
The latter contact prepares a self-holding circuit
A pump 10, which may be of any suitable' for solenoid 92 which extends from the positive
40 type, is rigidly fixed to frame I0, and supplies
terminal through conductor I I I,`switch 93, con
iluid pressure to chamber I5 from any suitable ductor II2, contacts 9_4 and conductor II3 to
source 1I through intake pipes 12, 13 and 14. solenoid 92. Upon closure of switch 93, which oc
An exhaust line 15 also communicates with source curs as mentioned below.' the circuit for solenoid v
1 I. A suitable reversing valve 89, which may be of 92 remains complete until the termination of the
.n Si any conventional type, is arranged, when in the
breaching operation being described.
'
illustrated position, to -connect supply line 14 with
With> valve 90 in the open position, and with
a pipe 8I, which is ñxed to piston' I6 and com
valve 8Ilin the illustrated position, as previously
municates with the lower portion of chamber I5 described, the lower portion of chamber I5 is
through ports 82; and to connect exhaust line 15. connected to the supply source 13 and the up
50 to pipe 82. Pipe 82, concentric with pipe 8|, is
per portion thereof is connected to the exhaust
ilxed to piston I6 and communicates with the line 15. Accordingly,- chamber I5 moves down
upper portion of chamber I 5. . In the opposite wardly, carrying broaching head I4 with it. This
position of valve 8l, line 14 is connected to pipe 82,
and exhaust line 15 is connected to pipe 8I.
Valve 8'0 is arranged for actuation by a crank 84,
which is connected to a push rod 85. Push-rod 85
' is provided with collars 86 and 81. Collar- 86 is
disposed for actuation by the upper end of chain
` ber I5 when the latter reaches the upper extreme
60 -of itsmovement, to thereby move crank 84 to the
motion moves cam 95 out of engagement with
roller 96, closing switch 93 and completing the
above described self-holding circuit for solenoid
C:
92. .
Because _of the'engagement of shoulder 62 and.
the lower end of support 22, and because of the
influence of compression spring 54, members 22
and 23 move downwardly with member 2I, com (il)
pressing spring 5I. As shank 2I approaches the
position with respect to bed-plate I2, illustrated
the latter reaches the lower limit of its path of - in Fig. 2, work piece I3 and bed plate I2 prevent
_ movement, to thereby rotate crank 8_4'and actuate , further downward movement of sleeve 23 and
valve 88 to the previously mentioned opposite support 22. - Shank 2|,-however, continues down
illustrated position. Collar 81 is arranged for
actuation by the lower end of chamber I5 when
position.
^
_
i
Supply lines _13 and 14 are connected -together
through an electro-mechanically operated >valve
38, which is biased to the illustrated closed posi
tion by spring 9|, and may be actuated -to theopen
position by- solenoid 92. The circuit for solenoid
921s arranged tor control by push button I9, a
.mcamanersted switch u and by self-holding con
I5
wardly, compressing spring 54.
l
Compression of-spring 54 causes support 22 to
move inwardly with respect to shank 2|. In' the
course of ythis movement, the sloping» shoulders'
35 associated with clamps 21 ride along thein 70
clined- surfaces 36 i'ormed in shank 2|, forcingÍ
clamps 2_1 inwardly. This action movesslioul
ders 33 of clamps 2_1 under shoulder 34 of broach
ma; «,thërstterfeontabts being ’closed dumm;y I8, and throws toggle members 3I and 32 to the
the energized condition of solenoid“,
position illustrated in Fig." 2, in which position
_
_
.
,
_
75
3
2,106,213
clamps 21 are biased to the broach engaging po
sition.
i
At an appropriate stage of the above described
broach engaging motion of shank 2I, the‘ lower
end of chamber I5 engages collar 81. VThe re
Ci
maining downward movement of chamber I5, ac,
cordingly, moves valve 80 to the opposite posi
to the ~position illustrated in Fig.'1, in which it
is resiliently supported on the previously de
scribed assembly associated with member I1.
They rotation of clamps 21, above mentioned,
also throws the toggle members 3| and 32 to the
position shown in Fig. l, in which these mem
bers are effective to bias clamps 21 to the broach
tion,4 reversing the connections between chamber
I5. supply line 14 and exhaust line 15. In re-`
sponse to this action, the downward movement
of chamber I5 is interrupted, and an upward
movement thereof is initiated.
releasing position.
At an appropriate state of the above mentioned
broach releasing movement of shank 2I, cam 95 il)
formed at the lower end of chamber I5, engages
The consequent upward movement of shank 2i
the roller 96.
The consequent movement of arm
l
`
94 is adjusted to open contacts 93 Ajust after
broach I8 is released. Upon the opening of con
22 to no upward force, except tacts 95. the previously mentioned self-holding
the biasing force of spring 5I, until after pin 52 lcircuit for solenoid 92 is interrupted, and valve
l subjects support
engages the upper end of slot 53 in support 22. 90 accordingly resumes the illustrated closed po
Thereafter, support 22 and broach I8 are pos .sition under the inñuence of biasing spring 9i.y
itively moved by the latter engagement. As a result, chamber I5 is disconnected from the
'Throughout such movement, shank 2I, support
supply and exhaust lines 14 -and 15, respectively,
and is stopped in the position illustrated in Fig.
positions illustrated in Fig. 3.
l; in which it is resiliently supported on spring
As the initial upward movement of shank 2l v5I and bed plate II. As will be evident from
continues, following the engagement 'of pin- 52 previous description, the machine remains in
and the lower end of slot 53, sleeve 23 resumes this position until a duplicate operation is in-V
the extended position illustrated in Fig. 3,4 in itiated by again closing button I9. 'As will be
which shoulders 25 bear against cooperating sur
understood also, the release of broach I8 upon
faces formed in bed plate II. This movement of the approach of head 2I tothe loading position,
sleeve 23, as previously explained, is innuenced affords an opportunity to place a new work piece
22, clamps 21 and broach I3 occupy the relative
25
by spring 5I.
80
l
over the end of broach I8 in readiness for-the '
In the course of the above described initial next broaching operation.
I
upward movement of the parts associated with »
>From the above description, it will be seen that
broaching head I5, during which support 22
moves upwardly within sleeve 23, the ends ¿il of
clamps 21 engage and rotate cams 43 about their
associated pivots 44. This motion, however, _has
no eiîect upon theposition of clamps 21 with re
spect to supports 22 and broach I8. ’
As the upward motion of~ chamber I5 contin
ues, after the above described initial adjustments
of the relative positions of shank 2i. support 22
and sleeve 23, shank 2| and support 22 are moved
out of engagement with sleeve 23, and sleeve 23
remains resiliently fixed in position with respect
to bed plate I I by spring 5I.
.
.
After broach` I8 has lbeen completely drawn
through work piece I3, and depending upon the
adjustment of collar 86 on push rod 85, the
upper end of chamber I5 engages collar 85, and
upon further movement, reverses the position of
valve 86. again establishing conditions to cause
chamber I5 to move downwardly. Accordingly,
the upward movement of chamber I5 is inter
' rupted and downward movementv thereof is be
gun.
.
.
As shank 2| and support 22, moving down
wardly, approach the loading position shown in
Fig. l, shank 2| again enters sleeve 23. In the
I0 of clamps>21
' course of this movement, arms
engage cams 43.. At this time, spring 54 is
spaced somewhat from shank 2I, as shown‘in
Fig. 3, and therefore exerts no biasing force `on
support 22. Sleeve v23, on the other hand, is
biased to the position shown in Fig. l by spring
5I.> Accordingly,4 cams d3 interrupt further
downward movement ,of support 22, causing
shank `2l to move downwardly with respect to
support 22. When shoulders 35, associated with
clamps 2.1, reach positions opposite to recesses.
35, the upper end of -spring. 54 engages'v shank 2I,`
tending' to prevent further upward movementl of
the present invention provides an automatic
broaching machine. arranged to provide a com
plete automatic work cycle including a loading
or broach engaging movement, a breaching move
ment, and a return movement to a loading po
sition, in the course of which the broach is auto
matically released to enable the application of 40
a new work piece.
Although a specific construction has been de
scribed,v it will be evident that various modifica
tions may be made in the form and arrangement
of parts without departing from the spirit and
scope of the present invention, the'described em
bodiment of which is to be considered in an i1
lustrative, and not in a limiting sense.
What isv claimed is:
1. In a machine ior operating a tool to be
drawn through a work piece, a head constructed 50
to engage and disengage said tool. means for
moving said head in a reciprocating path, trip
ping means for cooperating with said head to
cause said head to disengage said tool, and sta
tionary means for supporting said tripping 55
means' adjacent the path rof movement of >said
head for limited movement parallel to the path
of travel of said head.
„
2. In a machine for operating a toolto be 60
drawn through a work piece, a tool head con
structed to engage and disengage said tool, com
prising an outer sleevelike member, a core slid- .
ably supported within said sleevelike member,
means rendered effective during movement of 65
said head for interrupting the motion of said
core member, and meansrendered effective by
said interruption for actuating said head to re
lease said tool.
3. In a machine for operating a tool to be
drawn past a work piece, a head constructed to
engage and disengage said tool comprising la
support 22 in shank 2l. Further downward , pair of relatively movable members, means ren
movement of shank 2I, '_accordingly,._ causes dered effective by movement of said head for im
clamps 21 4to rotate about their pivot points, parting a first relative movement to said mov
swinging shoulders 35 into recesses 36, and re ‘ able members when said head reaches a first po
ccordingly, drops
leasing broach I8. Broach I8,
4
'2,106,213
sition and for imparting a’ second- relative move
ment to said members when said head reaches a
-further position; and a tool engaging element
positioned Within said head and operably respon
means positioned within said head and respon
sive to the driving of said core member by said
-sleeve for disengaging said tool.
'7. In a machine for operating a tool to be
sive to said ñrst relative movement to disengage drawn through a work piece, a head constructed
said tool and operably responsive to said sec , to engage and disengage said tool, said head hav
ond relative movement to engage said tool.
ing an inner core member and a sleeve surround
4. In a machine for operating a tool to be ing said core member and having a lost motion
drawn through a work piece, a head for sup
driving connection therewith; a tripping member
porting said tool‘ and for moving said tool positioned adjacent the path of travel of said
10
through a working range including an interme
head and effective to interrupt the motion of
diate loading position and a tool engaging posi
said core member so that continued motion of
tion spaced from said loading position; said head said head takes up said lost motion and renders
comprising ñrst and second relatively movable
15 elements, means responsive to the approach of said sleeve effective to drive said core member;
and means including a toggle clamp positioned
said head to said loading position for effecting a within said head and responsive to the driving
first relative movement between said members, of said core member by said sleeve to disengage
means responsive to the approach -of said head said tool.
'
to said tool engaging position for effecting a sec
8. In a machine for operating a tool to be
ond relative movement between said members, drawn througha work piece, a head constructed
and a tool engaging element carried by said to engage and disengage said tool, said head 20
head and operably responsive to said ñrst rela
having an inner core member and a sleeve sur
tive movement for disengaging said tool and rounding said core member and having a lost
operably responsive to said second relative move
motionr driving connection therewith; avtripping
ment for engaging said tool.
5. In a machine for operating a tool to be
drawn past a work piece, a tool supportingl head
constructed to engage and disengage said tool,
means for operating said head over a predeter
30 mined path, a tripping member responsive to the
movement of said head, stationary means for
supporting said tripping member adjacent the
path of movement of said head for limited move
l: Li
ment, said tripping member being effective to
cooperate with said head when at one limit of
movement to cause said head to disengage said
tool, and effective when at its other limit of
travel to cooperate with said head to cause said
head to engage said tool.
” '
6. In a machine for operating a tool to be
drawn through a work piece, a head constructed
to engage and disengage said tool, said head hav
ing an inner core member and al sleeve surround
\. ing said core member and having a lost motion
-a LI
driving connection therewith; a' tripping mem
ber positioned adjacent the path of, travel of said
head and-effective to interrupt the motion of said
core member so that continued motion of said
head takes up said lost motion and renders said
sleeve effective to drive said core member; and
memberl positioned adjacent the path of travel
of said head and effective to interrupt the motion
of said core member so that continued motion
of saidhead takes up said lost motion and ren
ders said sleeve eiïective to drive said core
member; said tripping member being rendered
effective by the driving of said core member
by said sleeve to actuate said head to disengage
said tool.
'
9. In a machine for operating a tool to be
drawn through a work piece, a head constructed '
vto engage and disengage said tool, said head
having an inner core member and a sleeve vsur
rounding said coremember and having a lost
motion driving connection therewith; a tripping
member positioned adjacent the path of travel
of said head and eñective to interrupt the mo
tion of said core member so that continued mo
tion of said head takes up said lost motion and
renders said sleeve e?fectlveto drive said core
member; a tool engaging element movably
mounted within said head; said tripping member
being îffective upon the driving of said core
membe by said sleeve to‘actuate said tool en
gazing element to release said tool.
CARL J. HAISBORG. ~
L
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