JPH0137829Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spool-wound welding wire that does not cause the wire to come loose or go through, and which allows the end of the winding to be easily pulled out at the beginning of use. be.

A long welding wire used for automatic or semi-automatic welding is provided by being wound around a winding structure (representatively referred to as a spool in this specification) in units of 10 to 20 kg or more, and the final end of the winding is Generally, it is inserted into a hole or slit in the flange of the spool,
It is bent and fixed so that it does not fall out. To take out the wire from such a spool-wound wire, hold the base side of the bent part with pliers, etc., cut off the tip, pull it out through the hole or slit, and guide the gripped part to the wire feeding device. However, if the end of the wire is cut without being sufficiently gripped by the pliers, the elastic force of the wire will cause the end of the winding to break.
There is a danger that nearly 10 wheels will spring back and come apart, causing injury to the worker's body, especially the face. This may cause a cross-over situation, and when the wire is being pulled out, the rear ring may bind the front ring, making it impossible to pull out the wire. That is, according to the above-mentioned conventional method, in the manufacturing stage of the spool-wound wire, end-stopping work is performed on the wire at the end of the winding, which not only causes a decrease in productivity, but also requires the use of tools such as pliers to take out the wire end. Moreover, if a mistake is made in taking out the wire end, the spring back may cause injury to the worker, or the loose winding rings may pass through each other, resulting in poor feeding.

The present invention was developed with attention to these circumstances, and it does not cause any unraveling or gouging phenomenon without special end-stopping work, and allows the ends to be easily taken out with bare hands. As a result of our research into providing a spool-wound welding wire that would allow us to do this, we finally arrived at the perfect solution.

Therefore, the spool-wound welding wire of the present invention is such that at least one of the wires forming the outermost winding layer has a cast diameter smaller than the wire winding diameter of the outermost winding layer, and the terminal end thereof has a cast diameter smaller than the wire winding diameter of the outermost winding layer. The gist lies in that the cast diameter is made substantially infinite.

The present inventors first conducted research on the wire unraveling phenomenon, and determined that the cast diameter of one or more wheels at the end of the wire winding (hereinafter simply referred to as the final wheel) was smaller than the wire winding diameter of the outermost winding layer. They discovered that certain results could be obtained by doing so, and based on this, they filed a patent application. In other words, the unraveling phenomenon is caused by the cast diameter of the wire at the end of winding (the natural bending diameter of the wire in an unforced state).
This occurs when the wire tries to spread because it is larger than the wire winding diameter of the outermost wrapped layer. Therefore, in order to suppress the unraveling phenomenon, it is necessary to set the cast diameter at the end of the winding to the diameter of the outermost wrapped layer. The idea was that it would be better to make the winding diameter smaller than the winding diameter, and the above patent application is a development of this idea.

FIG. 1 is a perspective view of the spool-wound wire wound in the manner described above, and FIG. 2 is an explanatory view of the section taken along the line - in FIG. 1. The wire W is wound in multiple layers around a spool 2 with a collar 1, and since the final ring has a smaller cast diameter than the normal ring, the elastic force of the wire acts in the diameter-reducing direction, causing the layers wound inside the final ring to At the same time, since the tip of the terminal end W ₁ is open, it is also lifted up in an arched shape by the elastic force of the wire, and the front of the tip is raised by h ₁ from the outermost circumferential wrapping layer. As a result, when the wire starts to be used, the terminal end _W1 can be easily found, the raised portion can be accurately grasped, and the terminal end of the wire can be fed to the feed roller of the welding machine.

By the way, the ease of finding the termination part is determined by the degree of separation of the termination part from the layer immediately before the outermost circumferential wrapping layer, so to that extent, the cast diameter of the termination part wire should be made as small as possible. It is desirable to do so. However, if the diameter of the cast is made too small, it will not only become more difficult to bite the feed roller of the welding machine (clipping work), but also increase the feeding resistance within the conduit tube, which is undesirable and causes the dispersion. In order to satisfy all of the requirements such as prevention of the phenomenon of scratching, ease of attaching to the feed roller, and reduction of feeding resistance within the conduit tube, the cast diameter of the final wheel should be adjusted to the wire of the outermost layer. It was found that approximately 70% of the winding diameter is optimal. However, with a cast diameter of this size, the height (h ₁ ) of the arched raised part is 10 to 15 mm.
If the end portion W ₁ were to get stuck in the gap between the wound wires of the previous layer, h ₁ ≈0 and it would be difficult to find the end portion W ₁ . On the other hand, the terminal end _W1 is strongly curved with a small cast diameter as described above, so
It is still difficult to kiss the tip as it is, and you have to straighten the tip with your fingertips or pliers.Furthermore, the tip cannot be fully stretched with your fingertips or pliers, so you have to cut it off with pliers.
Problems remained in terms of workability.

As a result of considering the above-mentioned problems, the inventors of the present invention have found that the problems of the present invention can be solved by curving the final wheel with the above-mentioned cast diameter and making the cast diameter of the terminal end, especially its tip, substantially infinite. We found that all of these problems can be solved and arrived at the configuration of the present invention.

The present invention will be explained below with reference to the drawings of the embodiments.
These embodiments are not intended to limit the scope of the present invention, and all modifications to the design as appropriate in accordance with the spirit of the above and later descriptions are included within the technical scope of the present invention.

Figures 3 and 4 are explanatory cross-sectional views showing the spool-wound wire according to the embodiment of the present invention. , wire termination
In other words, if the tip of W ₁ is made to be approximately straight in the wire bending direction over a certain appropriate length l ₁ (for example, about 5 to 10 cm for a 1.2 mm wire), the cast diameter is virtually infinite. It is growing to become larger. As a result, the straight part of the terminal end W ₁ acts like a support rod, so the small cast diameter part rises over a height h ₂ from the outermost surface of the wire due to the elastic force of the wire (h ₂ > h ₁ ). Therefore, even if the leading edge gets stuck in the wire gap (groove) of the previous layer, the lifting distance is large, so the terminal end can be easily found, and since the leading edge is straight, it can be easily moved to the feed roller. You can easily perform kissing tasks without any problems.

In FIG. 4, the final wire ring is curved in the same manner as described above, and the tip of the terminal end _W1 is extended straight toward the distal side, contrary to the example shown in FIG. As a result, the leading edge rises by a height h ₃ above the outermost wrapped layer, producing a similar effect. The difference between the example shown in FIG. 3 and the example shown in FIG. 4 is that when forming a straight portion at the leading edge of the wire, the orientation direction of the straight portion is different. That is, if the orientation direction is more than a predetermined angle inward from the tangential direction with respect to the cast circle of the termination wire, the example shown in FIG. If the point is in contact with the outermost wrapped layer at a point (not shown) and is more than a predetermined angle on the circumcenter side from the tangential direction, the example shown in FIG. This is an example of the effect. The predetermined angle is determined individually depending on the diameter and mechanical properties of the wire, but in any case, it is recommended that the length _l1 be set appropriately. FIG. 5 is a front view showing another embodiment, in which the final wheel is curved in the same manner as above, and the tip of the straight wire is bent in a direction perpendicular to the wire winding direction. Similar effects can be obtained in this example as well. FIG. 6 is a front view showing still another embodiment, in which the final wheel is curved in the same manner as described above, and for extra precaution, the final wheel is extended straight in a direction slightly opposite to the wire winding direction. Since the end identification label 3 is attached, the end of the wire can be found even more easily, and the wire can be fed to the welding machine without any trouble. Furthermore, as shown in the embodiment of FIG. 7, the tip of the wire terminal end _W1 is extended straight to make the cast diameter substantially infinite, and the straight part is A similar effect can be obtained even if the wire is oriented in a direction slightly deviating from the wire winding direction (a direction intersecting the winding direction at a slight angle).

The present invention is roughly constructed as described above, and it is possible to hold the spool-wound welding wire so that it does not come loose even without end-stopping. Furthermore, when starting to use the welding wire, the terminal end of the wire can be easily found, and since the terminal end of the wire is stretched straight, it is extremely easy to attach the wire to the feed roller. Needless to say, productivity has improved since no end stopping is required.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a comparative example of a spool-wound welding wire, Fig. 2 is a cross-sectional view taken along the line - in Fig. 1, and Figs. be. 1...Brim part, 2...Spool, 3...Identification label, W...Wire, _W1 ...Wire end part.

Claims (1)

[Scope of utility model registration request] In spool-wound welding wire, the welding wire is layered around the winding body so that elastic deformation remains.
At least one of the wires forming the outermost winding layer is given a cast diameter smaller than the wire winding diameter of the outermost winding layer, and the cast diameter at the terminal end thereof is made substantially infinite. A spool-wound welding wire featuring: