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Патент USA US2126526

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Aug. 9, 1938.
c. A. ARNHOLM'
2,126,526
BODY AND FENDER STRAIGHTENER
Filed Aug. 29. 19.55
N 93
2 Sheets-Sheet 1
“ -l
g7(21mg! !
3mm
Aug. 9, 1938. -
c. A. ARNHOLM
2,126,526
BODY AND FENDER STRAIGHTENER
Filed Aug.‘ 29. 1935
\IZTEE"
2 Sheets-Shéet 2
. 2,126,526
‘Patented AugIQ, 1938 ' \
UNITED, STATES PATENT OFFICE
2,126,528
_
pom! am) FENDER 'STBAIGHTENER
Charles Arthur-‘Arnhem Barre, Vt.
'
‘Application August 29, 1935, Serial No. 38,480
a Claims. (Ci. lac-s2)
This invention relates to sheet metal shaping by means of clamping devices l5 and IS, the
latter being fixed to the forward end of .the
arm II, while the outer portion I5 is bolted or
otherwise secured to the fixed portion it of the
clamping device. The power member H has a
valve l'i secured to a pipe i8 which is connected
to the power member‘ i4 and a valve operating
‘member i9 is carried by the valve I1 and in
cludes a dial having a pointer 20 associated
therewith so that the speed of the plunger in 10
the pneumatic power member it may be readily
controlled. The valve H has a supply pipe 2i
connected thereto and this supply pipe is con
devices and more particularly to a device for
straightening sheet metal bodies and fenders of
motor vehicles.
1
An object of this invention is to provide a
pneumaticv shaping device for use in removing
‘dents or like distortions from fenders, bodies, or
other similar sheet metal objects vwherein the
operating means for the shaping means is a
10 conventional pneumatic machine.
Another object of this invention is to provide
a shaping device of this type with means where
by the pneumatically operated hammer‘is lim
nected to a suitable source of air pressure supply.
ited in its operation and is so held with respect
A hammer 22 is detachably secured toethe 15
15 to the work that it can be easily moved along
power member ‘ it, being held in position by
thus prevent dents or ridges being formed by' means of a resilient clamp 23 secured to the
- housing of the pneumatic power member ll.
the pneumatically operated hammer.
A further object-of this invention is to ‘provide Preferably, the hammer 22 has a channel 24 20
within which an arm of the spring 23 engages
the work so as to smoothly shape the work and
20 a shaping means for sheet metal including hold
ing means for the shaping parts so that dents
or like distortions remote from the free ‘edges of
the part may be readily removed.
‘
p
‘The above and various other ‘objects and ad
25 vantages of this invention will in part be de
scribed in, and in part be understood from the
following detail description of the present pre
ferred embodiment, thesame being illustrated
in the accompanying drawings wherein
30
Figure 1 is a detail side elevation of a device
constructed according to an embodiment of this
invention.
_
" Figure 2 is a detail front elevation partly in
section of the device. showing the device in ap
plied position.
_
.
Figure 3 is a sectional view taken on the line
3-—3 of Figure 2.
Figure 4 is a sectional view taken on the line
4-4 of Figure 2.
40
.
Figure 5 is a detail side elevation oil a plurality
of anvils or hammers used with the device.
Figure. 8 is a fragmentary side elevation of
the pneumatic operator-with the movable ham
mer detachably secured thereto.
45
,
Referring to the drawings wherein like nu
merals of reference designate corresponding
parts throughout the several views, the numeral
Ill designates generally a frame structure which
in the present instance is substantially U-shaped
50 in configuration including an upper arm ii and
a lower arm l2 which is offset upwardly from
the lower portion ll of the frame It.
A pneumatic power member I 4 of. well known
construction is secured to the forward end of
55 the upper arm ll, being secured to the arm H
and this channel is of a width substantially equal
to the stroke of the power member 14.
A fixed anvil 25 is secured to the upper end of
a threaded anvil supportingmember 26 which is
threaded through the forward end of the lower
arm I2 and provided with a handle 21 by means ‘
of which the fixed head or anvil 25 may be' ad
justed relative to the movable head or anvil 22.
Preferably, the forward end of the arm I2 is
split and a bolt 28 passed through the split por
tions thereof so that the threaded supporting
member 26 may be locked in adjusted position
with ‘respect to the movable member 22.
The stroke of the hammer 22 is controlled by
means of a dolly structure. generally designated 35
as 29, which is adiustably secured to the power
member It below the upper arm II. This dolly
structure comprises a pair of downwardly di
vergent arms 30 which are ?xed to a split clamp
ing memben 3| adiustably fastened to the pe
riphery of the housing of the power member ll
by means of bolts 32.
The lower or divergent ends of the arms 32 are
provided with feet 33 having a fibre contacting
face 24. The feet 33 are pivotally secured, as at
25, to the lower ends of the arms 30. By means
of. the pivotal connection of the feet 32 with the
arms 20, the dolly structure 29 will automatically
adjust itself to the different con?gurations of the
sheet metal which it is desired to shape.
The two shaping members 22 and 25 are adapted
to have the desired metal contacting face and
may be shaped in any suitable manner, that is,
one of these members may be provided with a con
cave operating face and the other with a convex
2,120,520
operating face or the operating faces of these
members may be of any other selected configura
tion depending upon the manner in which it is
desired to shape the article. Preferably, the two
, members 22 and 25 are removable from their as
sociated parts so that these two members may be
used in pairs or the members of selected pairs
interchanged to secure the desired result with
respect to the sheet metal.
10
-
In theuse and operation of this device, the
frame II is adapted to engage about the opposite
sides of the article which is to be shaped with the
opposed relation to the anvil, a pair of down
wardly divergent arms, means for securing said
arms to the operating‘ means on opposite sides
of the movable hammer and a work engaging
member carried by the divergent ends of the
arms.
'
.
2. A shaping device as set forth comprising a
frame having va pair of spaced apart arms, an
anvil, threaded means engaging one of the arms
of the anvil to adjustably?supportvthe anvil in
the frame, locking'means for the threaded means, 10'
movable hammer“ on one side of the metal and 'a'movable'hamme'r, operating means for said mov
the fixed and adjustable member 25 on the oppo
‘is lite side thereof. The dolly structure 2'9 is then
adjusted so as to control the stroke and also con
trol the shaping of the article, this being accom
plished by adjusting the clamping member 3!
on the housing of the power member H. The
valve H is then opened to the desired degree so
as to effect the desired speed of movement of the
hammer 22 which is detachably held in operative
position by the spring 23 engaging in the channel
24 of the member 25.
It will, of course, be understood that the frame
ll may be of any suitable con?guration depend
ent only upon the character of the article which
is to be worked upon.
'
I claim:
1. A shaping device as set forth comprising a
frame, a pair of spaced apart arms, an anvil,
threaded supporting means engaging one of the
arms and the anvil to adjustably support the
anvil in the frame, locking means for said
threaded means, a movable hammer, operating
means for said movable hammer, clamping means
carried by the other arm 'and engaging the op
erating means to support the operating means in
, able hammer, means for securing the operating
means to the other arm, a pair of downwardly
divergent arms, means for securing said divergent
arms to the operating means for adjustment along
is,
the length of the operating means, a pair of
work engaging shoes and means for pivotally
securing the shoes to the divergent ends of the
latter arms.
'
3. A shaping device as set forth comprising a'
frame having a pair of‘ spaced apart arms. an
anvil, threaded supporting means engaging one
of the arms and the anvil to support the anvil
between the arms, a movable hammer opposed to
the anvil, operating means for the movable ham 25
mer, means for releasably securing the hammer to
the operating means, means for securing the ops
erating means to the other arm, means for con
trolling the speed of the operating means, a pair
of work engaging members disposed one on each 30
side of the movable hammer and in spaced rela
tion thereto and means for adjustably securing
said work engaging members to the operating
means whereby to limit the impact of the hammer
35
on the work.'
CHARLES ARTHUR ARNHOLM.
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