JPS6142706B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for drawing out welding wire stored in a cylindrical pack (hereinafter referred to as a level container), and in particular, to reduce the amount of plastic deformation of the wire that occurs during drawing, and to realize smooth wire feeding. The purpose is to In automatic and semi-automatic welding equipment that uses welding wire, large packages are being developed to increase the amount of supply wire that can be held and shorten changeover time. Those that are stored in large quantities and supplied to welding equipment from the container are often used. Among the items stored in the bail container, a pail-encased wire is used, which allows the wire coming out of the torch to have very little twist or bending, and to ensure accurate aiming. The wire housed in such a pail container is given an appropriate amount of twist, and elastic twisting generates a springing force on the wire and a restoring force that tends to expand the loop. Conversely, such a wire in a pail container uses this springing force and restoring force to restore the properties of the wire stored in the pail container to the straight wire properties before storage. It is. As a method of drawing out a wire having such properties, there are methods shown in FIGS. 1 and 2, etc. That is, FIG. 1 shows a jump prevention ring 1 attached to the upper part of the inner cylinder by placing a presser plate 101 on the upper surface of the wire and pulling out the wire from between the inner cylinder and the inner cylinder of the pail container.
02 and is pulled out through a pull-out correction roller (not shown). Also, Fig. 2 shows the one shown in Fig. 1 without the presser plate, in which a double-structured jump-prevention ring 201 is provided at the top of the inner cylinder, and the pull-out straightening roller (not shown) located on the center line of the pack is inserted. It is something that is drawn out. In both the methods shown in Figures 1 and 2, a ring-shaped jig is placed at the top of the inner cylinder to prevent direct contact between the tip of the inner cylinder and the wire. Irregularities (as is well known, such pail containers are almost always made of fiberboard, and their edges, especially the edges of the inner cylinder, are often burred and uneven) prevent circumferential movement. A phenomenon occurs in which the wire remains in one place and the wire loop is constricted. When such wire constriction occurs, the wire loop gradually becomes smaller and eventually becomes tightly wrapped around the inner cylinder surface, and the wire feeding is completely stopped. Furthermore, the presence of the inner cylinder makes the interior formed by the outer cylinder extremely narrow, and strongly restricts the path through which the wire is fed, causing deformations such as bending as described below. That is, in the drawing method as shown in FIG. 1, the wire 103 passes through a process in which plastic deformation may occur as described below before entering the drawing roller (not shown). The wire moves horizontally on the stored wire surface, bends upward from the holding plate, bends from the holding plate towards the outer diameter of the jump prevention ring located at the upper end of the inner cylinder, and then bends from the holding plate to the outer diameter of the jump prevention ring located at the upper end of the inner cylinder. It bends before it reaches the pull-out straightening roller. In addition, in the method shown in Figure 1, in order to eliminate wire jumping, it is required to make the weight of the holding plate heavier and to increase the outer diameter of the jumping prevention ring. Pale container inner diameter
For those that store 200 to 250 kg in 500 mm, the distance from the top of the inner cylinder to the top of the wire is approximately 350 to 100 mm.
Therefore, in order to eliminate the jump of the wire, the deformation of the wire becomes larger (plastic deformation becomes larger). In addition, in the method shown in Figure 2, since there is no presser plate on the storage surface, the wire does not immediately move from the wire storage surface to the pull-out roller as shown by the broken line 202, but instead jumps up from the wire storage surface as shown in the line 208. The wire that has jumped up is prevented from jumping out of the pail container by the lower ring or the upper ring (upper ring in the figure), and then returns to the wire storage surface and is guided from there to the pull-out roller. If the wire is pulled out in this way, a cross section between the wires will occur on the side of the inner cylinder, and the inner wire (one coil at the rear) will
However, it was confirmed that the outer wire (one ring on the straightening roller side) was strongly held between the inner cylinder surface and feeding became impossible. Furthermore, since the top surface of the wire stack becomes the beginning of the wire jumping up, depending on the state of the jumping up, the wire may fly out of the pail container. As described above, in the conventional method, the amount of plastic deformation becomes large when the wire passes through it, and the phenomenon that feeding becomes impossible occurs, resulting in a lack of stability for setting on a fully automatic line, etc. I have to say it.
It seems that many improvements have been made in the direction of reducing the amount of plastic deformation, but basically the wire passes through the process described above, and to some extent the twisting of the wire has been improved, but It is extremely difficult to obtain higher performance under the current conditions. The present invention has been made based on the above, and aims to improve the pail container itself and the wire regulation guide plate device to provide a method for smoothly drawing out the wire without causing plastic deformation as much as possible. However, with this invention, per revolution
In a method for pulling out welding wire in which loops twisted at 360° are stacked and stored in a cylindrical pack while being eccentrically arranged one after another, the inner cylinder of the cylindrical pack is omitted and the pack consists of a bottom plate, an outer cylinder, and a tube. It is constructed as an inner cylinder or container, and a wire guide jig is arranged above the laminated wire so as to form a gap between the inner wall surface of the outer cylinder of the cylindrical pack, and the wire is guided through the gap. The guide jig is pulled out in the direction of the central axis of the pack, and furthermore, an elastic member is provided on at least a portion of the periphery of the guide jig so as to come into contact with the inner wall surface of the outer cylinder. The present invention will be described below based on the drawings, but the drawings show specific examples, and the present invention is not limited to these examples, and the shape may be slightly changed or Even if a part of the design is changed, the same implementation is possible. FIG. 3 is a partially cutaway overall view illustrating the method of the present invention. The wire is directly connected to the straightener 4 from the vicinity of the outer cylinder 1.
is fed to the pail container 1 and the removal lid 3.
It passes through a space without any obstructions that would cause plastic deformation inside it. FIG. 4 is an enlarged view of the rising part of the wire according to the present invention, showing the basics of the present invention, in which a gap 9 is created between the presser guide plate 8 placed on the top surface of the storage wire w and the inner wall of the pail container 1. The outer diameter is such that the wire _w1 is drawn out from the gap 9. Furthermore, since such a wire is drawn out while being advanced along the gap 9, the edges of the presser guide plate 8 must be smooth. That is, when the wire w ₁ to be drawn out is released from the contact pressure of the guide plate 8, it tries to expand its loop diameter, but the expanding direction is in the direction of contacting the inner wall of the pail container 1, and the wire w 1 is expanded so as to be in contact with this inner wall surface. The rattled wire reaches its maximum allowable expansion within the container and is pulled out along (contacting) the edge. In other words, such a drawer is in a state where there is little risk of plastic deformation, and since there is no drawer with a small radius of curvature when drawing out, smooth drawing operation can be performed. It is preferable that the guide plate 8 has a rising curved surface 8b around it as shown in FIG. If this is done, the gap side 8b will inevitably become smooth, which is convenient. Furthermore, such a presser foot guide plate 8
As shown in FIG. 6 (plan view), when the pull-out wire is pulled out from the left side as shown by the broken line _w1b , it slides on the top surface of the laminated wire w and the container 1 is pulled out.
When pulled out from the opposite side (dotted chain line), the jump force can be effectively restrained. The guide plate 10 shown in FIG. 7 is made of lightweight material and easily exhibits the above-mentioned behavior. The material used is, for example, a thin metal plate, cardboard, or fiberboard. It is recommended to provide an operation hole 10a in the center of the wire, which also serves as a check for residual wire, so as to facilitate insertion into the pail container. By the way, when using such guide plates 8, 10, it is recommended that the width of the gap 9 be within about 30 mm in the radial direction. That is, if the diameter is 30 mm or more, there is a possibility that the springing force of the wire cannot be restrained depending on the diameter of the coil. Further, it is clear that the width is 1/2 or more of the wires to be laminated. The value within 30 mm is appropriately selected depending on the wire diameter and the diameter of the pail container. For example, with a wire diameter of 1.2 mmφ, the diameter of the pail container is 500 mm.
In the case of mmφ, if the coil diameter is 440mmφ, approximately 10mm is appropriate. In such a case, since the lightweight guide plate 10, which is not very heavy, may jump up due to the jumping force of the wire, an elastic piece 8 is attached to an appropriate position around it as shown in Fig. 8. A device that stably holds is recommended. A soft elastic rubber or sponge material is particularly suitable for the elastic piece 7, but other flexible materials may also be used. With this kind of holding jig, if the wire guide jig body alone cannot cover the jumping force of the wire, for example when the tensile strength of the wire is small, the loop can be expanded even if restoring force is present. However, there are cases where the loop is pulled out eccentrically. In this case, the guiding jig body may float up, causing the lower wire to jump up and follow, and this can be prevented. The fact that the guide jig is "stably held" by an elastic body means that the contact between the wire and the guide jig body becomes elastic due to the jumping force generated by twisting, which contributes to the stability of the wire behavior. do. Further, such an elastic piece 7 deforms on its own to allow the passage of the drawing wire without providing almost any resistance. Furthermore, if the tensile strength of the stored wire is small, even if there is a restoring force, the loop may not expand and it may be pulled out eccentrically, and when it is pulled out, the guide jig body may rise and fall. The wire jumps up. This can be prevented. Also, when installing the elastic piece 7, be careful not to hook the pull-out wire on the guide plate 10.
It is recommended that the elastic piece 7 be provided on the top side (Fig. 8), but if it is provided on the bottom side as shown in Fig. 9, the elastic piece 7 should have a length that exceeds the width of the stack of housing wires w.
It should be a. Furthermore, as shown in FIG. 10, it is extremely preferable to make the lightweight guide plate 10 double and insert the elastic piece 7 between them, since there is no need to select the direction of accommodation in the container. In these embodiments, a guide device is disposed above the laminated wire so as to be lowered sequentially as the weight of the accommodated wire w decreases, but such a device may be disposed in other ways. For example, as shown below, a support can be installed in the space 2 created by wire. In other words, the guide plate jig 11 shown in FIG. The guide ring 12 formed along the inner wall surface of the container 1 is held at a constant height by the support 18, and the support 13 is connected to the base plate 14.
can be attached to. Although such a guide plate jig 11 does not directly pressurize the top surface of the housing wire,
The wire to be pulled out is pulled out from the gap 9 while expanding in the direction of contacting the inner wall of the container in the same way as described above. After being guided to hang down into part 2, gap 9
is drawn out through. i.e. pull out wire w ₁
Even if the next wheel floats up as a result of this, it hangs down in the space around the guide ring 12, the lifting force is reduced accordingly, and it stops at the bottom of the ring 12. Further, since the pull-out wires _w1 are always moving along the periphery of the guide ring portion 12, they are never entangled with each other. FIG. 12 is a sketch of the guide plate jig 11, in which the guide ring portion 12, support portion 13, and base plate portion 14 are all made of wire rods, but these may also be made of a suitable plate material. In particular, it is recommended that the outer periphery of the guide ring portion 12 be made of a wear-resistant material. Further, as shown in FIG. 13, the guide ring section can be implemented in the same manner as in a plurality of stages. When the guide ring section is configured in a plurality of stages, the lowest stage side is formed in the same manner as the guide ring section 12,
The upper stage side is used as an auxiliary guide ring 12a. 1st
Figure 3 shows another example of the configuration shown in Figure 12, with the guide ring section being replaced by a disk 1.
5, which is further combined with a cylindrical column 16 and a base plate 17 is illustrated. FIG. 14 is a sectional view showing an example of the use of a top surface pressurizing type guide plate device for housing wires in which double guide rings are used.
The guide ring portions 18 and 19 are connected to each other.
indicates the same outer diameter. Furthermore, the guide ring part 18,
It is also possible to make one of the rings 19 a small diameter and use the other as an auxiliary guide ring as explained in FIG. 13, or it can be implemented by appropriately combining wire rods or plate materials. FIG. 15 shows another example of a wire guide jig placed on the wire lamination surface, in which the rings 21 and 22 are placed on the member 24.
, and an elastic body 23 is attached.
If the outer ring 21 is a ring with a circular cross section,
When the wire is drawn out, there is extremely little resistance when making contact, and unlike other examples, special processing of the edge portion is not required, which is very advantageous. Elastic body 23
Although the ring 21 is fixed with an adhesive, any other method may be used, but the key to making this method effective is to ensure that there are no irregularities on the outside of the ring 21. As described above, the present invention is a simple device in which the inner cylinder of the storage container is removed when pulling out the wire stored in the pail container with approximately 360 degrees of twist applied to the wire per loop. This eliminates the influence of the inner cylinder and allows the loop to be pulled out in a direction that expands the diameter, resulting in the following effects. The amount of plastic deformation of the drawer wire is reduced,
The deflection of the tip of the wire sent out from the torch is reduced to about 1/3 of the conventional range, making it possible to ensure stability in the aiming position. Therefore, fully automatic welding, robot welding, etc. can be applied and used. The resistance of the wire to be pulled out is reduced, the wire being pulled out moves other wires, and there is no squeezing of the wire, so there is no fraying or jumping up, and there is no stoppage of feeding. Since the obstacle inside the pail container, that is, the inner tube, is gone, the wire cannot be wrapped around the inner tube as described above, and even if the loop is squeezed for some reason, the wire will be ejected from the outside of the pull-out jig, and the wire can be pulled out. The constraint conditions are extremely wide, and troubles such as feeding stops and kinks (wire bending phenomenon) do not occur. The results of using this elicitation method are shown below. (1) About the deflection of the wire from the tip of the torch Figure 16 shows the situation when the wire is fed in a direction perpendicular to the paper, with the contact tip 15 cm away from the paper and the torch aimed at the ● and in the figure. It shows the passing position of the wire at regular time intervals. A is the conventional feeding method as shown in FIG.
The target position is marked with a ●. As shown in Fig. 16, the wire's aim moves within an area of 5 mm x 13 mm even though it is aiming at the ● mark. On the other hand, in the method using FIG. 8 of the present invention, the passing position is shown as B in FIG. The target position is. In this example, it can be seen that the method of the present invention shows an improvement in aiming accuracy of about 4 times. (2) Concerning wire feeding troubles Test results for wire feeding troubles using this method and conventional methods (Figures 1 and 2) show that the wire kinks (the wire jumps up from the laminated surface and is pulled out). If the wire is not fed one after another, the wire will bend at the edge of the wire outlet), and the number of times the wire could not be fed was compared by drawing out approximately 100 kg each. The results were as shown in Table 1 below.

[Table] In the method of the present invention, there were no instances of failure to feed. In a fully automatic line, feeding failure cannot be tolerated even once, and conventional methods cannot be used. If the method of the present invention is used, especially the use of a wire guide jig as shown in FIG. 8, it can be useful for line rationalization and labor saving.

[Brief explanation of the drawing]

FIGS. 1 and 2 show a method for drawing out wires housed in a conventional pail container. Fig. 3 is an embodiment of the present invention, Fig. 4 is a partially enlarged view of Fig. 3, and Fig. 5 is a partially enlarged view of Fig. 3.
The drawings are explanatory diagrams of the present invention, and are a sectional view equivalent to Fig. 4, Fig. 6 is a plan view of an embodiment of the invention, Fig. 7 is a sketch showing another embodiment of the invention, Figs. 10
The figures are a sketch showing another embodiment of the guide plate shown in Fig. 7, Fig. 11 is a longitudinal sectional view showing another embodiment of the present invention, Fig. 12 is a sketch of a guide plate jig,
14 and 17 are side views and sketches showing other examples of the structure of the guide plate jig, and FIG. 15 is an explanatory sectional view showing another example of the structure of the mounting type guide plate jig. 1st
FIG. 6 is a chart showing the deviation in the target position of the wire. DESCRIPTION OF SYMBOLS 1...Pail container, 2...Cavity part, 3...Takeout lid, 4...Correction device, 5...Conduit tube, 6...Press plate, 7...Elastic body, 8...
Information board, 9... Gap, 10... Information board, 11...
Guide plate jig, 12... Guide ring part, 13... Support column part, 14... Base plate part, 15... Guide plate, 16...
Pillar, 17... Bottom plate, 18, 19... Guide ring, 2
0...Middle pillar.

Claims (1)

[Claims] 1. A method for drawing out welding wire in which loops twisted by 360° per turn are stacked and stored in a cylindrical pack while being eccentrically stacked in order, in which the cylindrical pack is connected to the bottom plate and the outside. A wire guide jig is arranged above the laminated wire so as to form a gap between the inner wall surface of the outer cylinder of the cylindrical pack, and A method for drawing out a welding wire in a pack, characterized in that the wire is pulled out in the direction of the center axis of a cylindrical pack. 2. A method for drawing out welding wire in which loops twisted by 360° per revolution are stacked and stored in a cylindrical pack while being eccentrically stacked one after another in a cylindrical pack, and the cylindrical pack is turned into an inner cylinder consisting of a bottom plate and an outer cylinder. A wire guide jig is disposed above the laminated wire so as to form a gap with the inner wall surface of the outer cylinder of the cylindrical pack, and at least a part of the periphery of the guide jig is configured. 1. A method for drawing out a welding wire in a pack, characterized in that an elastic body is provided in contact with the inner wall surface, and the wire is drawn out in the direction of the central axis of the cylindrical pack through the gap.