U.S. patent application number 09/380708 was filed with the patent office on 2002-01-03 for welding wire charge.
Invention is credited to ASHIDATE, TADAMI, HASHIDA, YASUHIKO, KAWASAI, ZENJI, RYOKE, KENJI, YOSHIDA, HIROSHI.
Application Number | 20020000391 09/380708 |
Document ID | / |
Family ID | 14207497 |
Filed Date | 2002-01-03 |
United States Patent
Application |
20020000391 |
Kind Code |
A1 |
KAWASAI, ZENJI ; et
al. |
January 3, 2002 |
WELDING WIRE CHARGE
Abstract
This invention offers welding wire packages without twining and
tangling even if welding wire is drawn out from pail containers in
high speed, and also without bending set of the wire. Namely, in a
welding wire package in which welding wire with torsion is packed
as heaped loops, a wire pressing member is disposed on top of the
heaped loops, wherein the wire pressing member comprises a loop
pressing part for pressing the heaped loops of the welding wire,
and a wire guiding part having a hole of not more than 180 mm in
diameter in a center of the wire pressing member for passage of the
welding wire.
Inventors: |
KAWASAI, ZENJI; (HIKARI,
JP) ; ASHIDATE, TADAMI; (HIKARI, JP) ;
HASHIDA, YASUHIKO; (TOKYO, JP) ; RYOKE, KENJI;
(TOKYO, JP) ; YOSHIDA, HIROSHI; (TOKYO,
JP) |
Correspondence
Address: |
WENDEROTH LIND & PONACK
2033 K STREET NW
SUITE 800
WASHINGTON
DC
20006
|
Family ID: |
14207497 |
Appl. No.: |
09/380708 |
Filed: |
September 8, 1999 |
PCT Filed: |
January 29, 1998 |
PCT NO: |
PCT/JP98/00372 |
Current U.S.
Class: |
206/408 ;
206/397; 206/398; 206/413 |
Current CPC
Class: |
B23K 9/1333 20130101;
B65D 85/04 20130101; B65H 49/08 20130101; B65H 57/18 20130101 |
Class at
Publication: |
206/408 ;
206/397; 206/398; 206/413 |
International
Class: |
B65D 085/66; B65D
085/671; B65D 085/675; B65D 085/677; B65D 085/67 |
Claims
1. A welding wire package wherein welding wire with torsion is
packed as heaped loops in a pail container while making a
cylindrical cavity therein, wherein a wire pressing member is
disposed on top of said heaped loops; the wire pressing member
comprising a loop pressing part for pressing the heaped loops of
the welding wire, and a wire guiding part having a hole of not more
than 180 mm in diameter in a center of the wire pressing member for
passage of the welding wire.
2. The welding wire package according to claim 1, wherein the wire
pressing member is a flat circular plate having a wire drawing-out
hole in a center.
3. The welding wire package according to claim 1, wherein the wire
pressing member comprises an annular plate having necessary width
for pressing the heaped loops, and a ring being connected to a
center of the annular plate for passage of the welding wire.
4. The welding wire package according to claim 1, 2 or 3, wherein
diameter of the hole of the wire guiding part is not less than
0.55T+10 (mm), where rupture strength of the welding wire is T
(kgf).
5. The welding wire package according to claim 1, 2, 3 or 4,
wherein a ratio W/T is in a range of 4 to 32, where weight of the
wire pressing member is W (g) and rupture strength of the welding
wire is T (kgf).
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a package of welding wire
such as solid wire and flux-cored wire, wherein the wire is heaped
as loops with torsion in a pail container.
BACKGROUND ART
[0002] Pail containers are commonly used for large capacity
reservoirs of welding wire as 200 to 300 kg. In the pail container
the welding wire is filled with torsion within elasticity limit
stress, for instance, 270 to 360 degrees per one loop of the wire.
Thus the welding wire in the pail container involves a force to
release the torsion. Therefore when the wire does not restricted,
the wire has a tendency to jump toward an axial direction of the
pail container. This cause twining and tangling frequently in
drawing out the wire from the pail container. For solving this
problem it is known as described in Japanese published patent No.
Sho 59-8474 that an annular pressing plate is put on the heaped
welding-wire loops to push the wire downwards.
[0003] FIG. 5 shows a cross-sectional view of welding wire filled
in a pail container as shown in above mentioned Japanese published
patent No. Sho 59-8474, wherein the wire is heaped in layers with
torsion and being drawn out from the pail container 1. The welding
wire 5 forms cylindrical cavity 4 inside the heaped loops 2. On the
top of the heaped loops 2 an annular pressing plate 8 is placed for
preventing the welding wire from jumping. In this case an inner
diameter of the annular pressing plate is slightly smaller than an
inner diameter of the heaped loops as necessary and enough
dimension for pushing the heaped loops. For instance, as inner
diameters of ordinary pail containers are 500 mm or 650 mm, the
inner diameters of the heaped loops become 340 to 460 mm, then the
annular pressing plates of 230 to 350 mm in inner diameters are
adopted.
[0004] In the process of drawing out welding wire from a pail
container in FIG. 5 the welding wire 5 is drawn out upwards,
wherein a separation point of the wire from the heaped loops 2
travels along the inner edge 9 of the annular pressing plate 8 at
the top of the heaped loops 2. FIG. 6 is a plan view of a part of
the pail container shown in FIG. 5, wherein a few turns of wire at
the top of the heaped loops 2 are especially shown. Because the
separation point of the welding wire 5 rotates along the inner edge
9 of the annular pressing plate, the welding wire is drawn out
while being in contact with a next loop 10 in nearly parallel and
while traveling along the inner edge 9 of the annular pressing
plate 8. Consequently, the annular pressing plate is slightly lift
when welding wire is drawn out in high speed or rigidity of the
welding wire is high. This may cause twining and tangling wherein
the next loop 10 and moreover the succeeding loops 11 are drawn out
into the cylindrical cavity 4 and the wire springs up in the
cylindrical cavity owing to release torsion.
DISCLOSURE OF THE INVENTION
[0005] In consideration of the above mentioned current status, the
present invention is intended to offer a welding wire package which
has not problem of twining and tangling even if welding wire is
drawn out in high speed or rigidity of the welding wire is high,
and also which attains smooth feeding of welding wire to welding
location without bending set of the wire.
[0006] Namely, the present invention is a welding wire package
wherein welding wire with torsion is packed as heaped loops in a
pail container while making a cylindrical cavity therein, wherein a
wire pressing member is disposed on top of the heaped loops. And
then, the wire pressing member comprises a loop pressing part for
pressing the heaped loops of the welding wire, and a wire guiding
part having a hole of not more than 180 mm in diameter in a center
of the wire pressing member for passage of the welding wire.
[0007] As most preferable embodiment, the diameter of the hole of
the wire guiding part is not less than 0.55T+10 (mm), where rupture
strength of the welding wire is T (kgf), and also a ratio W/T is in
a range of 4 to 32, where weight of the wire pressing member is W
(g) and rupture strength of the welding wire is T (kgf).
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a cross-sectional view of a welding wire package
of the present invention while wire is being drawn out from a pail
container, FIG. 2 is a plan view of a part of FIG. 1, and FIG. 3 is
an enlargement of a part of FIG. 1. FIG. 4 is a plan view of an
another example of the wire pressing member in this invention.
[0009] FIG. 5 is a cross-sectional view of a welding wire package
of prior art while wire is being drawn out from a pail container
and FIG. 6 is a plan view of a part of FIG. 5.
BEST MODE FOR CARRYING OUT THE INVENTION
[0010] The present invention will be explained by referring the
attached drawings. An example of a welding wire package of the
present invention is shown in FIG. 1. FIG. 1 is a cross-sectional
view of a welding wire package while wire is being drawn out from a
pail container 1, in which the wire is heaped as loops with
torsion. A circular pressing plate 3 is put on the heaped loops 2
to prevent the wire from jumping up. The circular pressing plate 3
of this invention has a wire drawing-out hole 6 in its center.
Namely, in this invention the circular pressing plate 3 has a
function not only for pressing heaped loops 2, but also for
regulating wire drawing-out pass in its center. Besides, 12 is
string members which prevent the welding wire from jumping out
through a gap between inner wall of the pail container 1 and the
pressing plate 3. Same effect is attained by a pressing plate 3
equipped with spring members in contact with inner wall of the pail
container 1 instead of the string members.
[0011] FIG. 2 is a plan view of a part of the pail container shown
in FIG. 1, wherein a few turns of wire at the top of the heaped
loops 2 are especially shown. Besides, FIG. 3 is enlargement of a
part of FIG. 1. In the present invention, because a wire
drawing-out hole 6 is located at the central part of the pressing
plate 3, the loop of just being drawn out is expanded until being
in contact with the inner wall of the pail container, forced by
rigidity of the welding wire with torsion. Accordingly, the welding
wire is drawn out from the contact point at the inner wall of the
pail container toward the wire drawing-out hole 6, then the wire
always traverse across the next loop 10 and the succeeding loops
11. Therefore the loop of just being drawn out does not made
parallel to the next loop 10 and the succeeding loops 11, then
loops are drawn out not in plural into the cylindrical cavity
4.
[0012] Besides, the welding wire 5 is drawn out from the wire
drawing-out hole 6 right upwards, because a wire drawing-out device
or a wire drawing-out guide which is not shown in FIG. 1 or FIG. 3
is installed over the wire drawing-out hole. Therefore as shown in
FIG. 3, the welding wire is exerted a force of arrow B direction by
a tension of drawing out, wherein a corner 7 of the wire
drawing-out hole in the center of the pressing plate 3 functions as
a fulcrum. Then the welding wire 5 in the cylindrical cavity 4
becomes arched between the contact point at the inner wall of the
pail container and the corner 7 of the wire drawing-out hole. This
arched welding wire exerts a force of C direction, so the wire is
drawn out while pressing the next loop and the succeeding loops.
Consequently the succeeding loops are not drawn into the
cylindrical cavity, even if the wire is drawn out in high speed or
the pressing plate 3 is slightly lift. So the welding wire 5 drawn
out from under the circular pressing plate 3 does not twine itself
nor tangle.
[0013] In order to obtain the above explained effect, a diameter of
the wire drawing-out hole of the circular pressing plate should be
not more than 180 mm, preferably not more than 150 mm. If the
diameter of the wire drawing-out hole exceeds 180 mm, the force
which makes the corner 7 of the wire drawing-out hole as a fulcrum
is small. Therefore, the next loop 10 and the succeeding loops 11
cannot be suppressed. Also the loop of just being drawn out may
touch in parallel with the succeeding loops 11, causing twining and
tangling by the succeeding loops 11 being drawn out into the
cylindrical cavity 4.
[0014] On the other hand, a too small wire drawing-out hole of the
pressing plate is unfavorable. Namely, it is favorable that the
diameter of the wire drawing-out hole is not less than 0.55T+10
(mm), where rupture strength of the welding wire is T (kgf).
According to an experiment, if a diameter of the wire drawing-out
hole is less than 0.55T+10 (mm) in relation to rupture strength T
of the welding wire, a tendency toward bending set in the drawn-out
welding wire becomes notable. This is caused by the welding wire
being given bending set by the corner 7 of the wire drawing-out
hole, when the diameter of the wire drawing-out hole is small as
compared with rupture strength of the wire, namely rigidity which
is proportional to the rupture strength. As a result, meanders of
welding bead may occur caused by swing of an end of the welding
wire being stuck out from a torch in welding operation.
[0015] Moreover, there is a favorable range also in weight of the
pressing plate in this invention. Namely, a ratio W/T is favorable
to be in a range of 4 to 32, where weight of the wire pressing
plate is W (g) and rupture strength of the welding wire is T (kgf).
If W/T is less than 4, rupture strength namely rigidity of the
welding wire is too high in comparison with the weight of the
pressing plate. Therefore being exerted a large force of direction
A in FIG. 3, the pressing plate 3 is lifted up. Accordingly upper
layers of the heaped loops 2 spring up and twining and tangling may
occur. Contrarily if W/T exceeds 32, rupture strength namely
rigidity of the welding wire is too low or the weight of the
pressing plate is too large. Therefore being not able to expand
until inner wall of the pail container, a loop of just being drawn
out may contact with lower layer loops in parallel. Consequently
lower layer loops may be drawn out into the cylindrical cavity 4
and twining and tangling may occur. Moreover meanders of welding
bead may occur in some cases caused by the welding wire 5 being
suffered bending set by the corner 7 of the wire drawing-out
hole.
[0016] The above explained is an example of the wire pressing
member which adopts a circular plate with a wire drawing-out hole
in the center. However, the wire pressing member in this invention
is not restricted to that shape as far as it has functionally a
part for pressing heaped loops and a part for guiding welding wire
in the central part. FIG. 4 shows a plan view of an another example
of the wire pressing member in this invention, wherein a ring 14
for passing through welding wire is connected by three supporting
rods 15 to the central part of an annular plate 13. This annular
plate 13 has a width necessary for pressing heaped loops and has a
function of solely pressing heaped loops, as the annular pressing
plate 8 in the prior art shown in FIG. 5. The ring 14 is for
passing through welding wire, then it is a matter of course that
its inner diameter should satisfy the dimensional condition of a
hole of the wire guiding part in this invention. The wire pressing
member in FIG. 4 has the advantage that wire condition in the pail
container can be easily inspected as compared with the pressing
plate shown in FIG. 1.
EXAMPLE
[0017] Examples of welding wire packages of the present invention
will be explained in the following. Solid wire and flux-cored wire
of 1.2 mm and 1.6 mm in diameter which had respectively various
rupture strength were heaped in loops with torsion of 360 degrees
per one turn in pail containers of 500 mm and 650 mm in their inner
diameters. Circular plates which had respectively a wire
drawing-out hole of various diameters and various weight were put
upon the heaped loops. These conditions are shown in table 1.
Besides, rupture strength of welding wire is respectively a mean of
measurements of 5 times.
[0018] Frequency of twining and tangling during drawing out welding
wire was inspected in the each example of No. 1 to No. 8 in table
1. Testing method was that welding wire was drawn out continuously
during 4 hours in a speed of 15 m per minute from two or three pail
containers per each condition. Results are shown together also in
table 1.
1 TABLE 1 Inner diameter Pressing plate Welding wire Test results
of pail Diameter H Weight Rupture Twining and Test container of
drawing- W Diameter strength tangling Wire No. (mm) out hole (mm)
(g) Kind* (mm) T (kgf) 0.55T + 10 W/T (times) condition 1 500 100
1650 F 1.2 57 41 28.9 0 Good 2 500 150 1550 S 1.6 208 124 7.5 0
Good 3 650 80 1000 F 1.6 93 61 10.8 0 Good 4 650 120 1500 S 1.2 85
57 17.6 0 Good 5 500 150 700 S 1.6 213 127 3.3 1 Good 6 650 70 1900
F 1.2 56 41 33.9 1 Bending set 7 650 50 1200 S 1.6 156 96 7.7 0
Bending set 8 500 200 1650 F 1.2 74 51 22.3 3 Good *F: Flux-cored
wire S: Solid wire
[0019] As apparent from table 1, a wire drawing-out hole of not
more than 180 mm in diameter was provided in a central part of the
circular pressing plate in each of No. 1 to No. 7. Especially No. 1
to No. 4 satisfy preferable conditions that the diameter of the
hole of the wire guiding part is not less than 0.55T+10 (mm) in
relation to welding wire, and also a ratio W/T is in a range of 4
to 32 between weight of the wire pressing plate W and rupture
strength of the welding wire T. Therefore the loop of just being
drawn out was expanded as being in contact with the inner wall of
the pail container, and then the wire traversed across the next
loop and the succeeding loops. Then neither the next loop nor of
course the succeeding loops were drawn out into the cylindrical
cavity, because the welding wire being drawn out became arched in
the cylindrical cavity by making the corner of the wire drawing-out
hole as a fulcrum and the wire was drawn out while pressing the
next loop and the succeeding loops. Consequently, results were very
satisfactory that neither twining and tangling nor bending set in
welding wire by the corner of the wire drawing-out hole
occurred.
[0020] On the other hand, in test No. 5 rigidity of the welding
wire was too high in comparison with the weight of the pressing
plate, resulting in a ratio W/T between weight W of the wire
pressing plate and rupture strength T of the welding wire being too
small. Therefore the pressing plate was lifted up, upper layers of
the heaped loops sprang up, and then twining and tangling occurred
once.
[0021] In test No. 6 rigidity of the welding wire was too low in
comparison with the weight of the pressing plate, resulting in a
ratio W/T between weight W of the wire pressing plate and rupture
strength T of the welding wire being too high. So because a loop of
just being drawn out was not able to expand until inner wall of the
pail container and was drawn out while in contact with lower layer
loops in parallel, the lower layer loops were drawn out into the
cylindrical cavity and twining and tangling occurred once. Moreover
the welding wire was suffered bending set by the corner of the wire
drawing-out hole.
[0022] In test No. 7 the diameter H of the wire drawing-out hole
was less than 0.55T+10 (mm) in relation to rupture strength T of
welding wire. Consequently because the diameter H of the wire
drawing-out hole was small as compared with rupture strength
(rigidity) of the wire, the welding wire was suffered bending set
by the corner of the wire drawing-out hole.
[0023] In test No. 8, as the diameter of the wire drawing-out hole
exceeded 180 mm, the force which made the corner of the wire
drawing-out hole as a fulcrum was small. Therefore the next loop
and the succeeding loops could not be suppressed, and the loop of
just being drawn out touched in parallel with the succeeding loops.
So twining and tangling occurred three times by the succeeding
loops being drawn out into the cylindrical cavity.
APPLICATION TO INDUSTRIES
[0024] Packages of welding wire in the present invention do not
arise twining and tangling even if welding wire is drawn out in
high speed or rigidity of the welding wire is high, and also attain
smooth feeding of welding wire to welding location without bending
set of the wire.
* * * * *