JP2650673B2 - Spool winding welding wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding wire which is coated with lubricating oil on a surface and wound on a plastic spool.

[0002]

2. Description of the Related Art Generally, a method of manufacturing a welding wire 2 'is shown in FIG.
And wound on a plastic spool 8, and formed into a spool wound welding wire 2 'having a unit weight of 20 kg or the like, which is the final product shape. That is, the wire drawing material 2 is stored in the carrier 1 and the rollers 3 ′
, And the wire is drawn to a predetermined product wire size by a wire drawing machine 4, and then the welding wire 2 ′ is wound around a plastic spool 8 using a winding machine 7. take.

[0003] In this case, the tension of the welding wire 2 'is controlled by a tension control device, and an appropriate amount of lubricating oil is applied to the surface of the welding wire 2' using an oiling device 6. I have. Such lubrication itself to the welding wire is disclosed, for example, in JP-A-1-107876, Japanese Utility Model Laid-Open No. 57-152372.
It is well known in Japanese Patent Publication No.

[0004]

In the case of a welding wire 2 'manufactured on a manufacturing line as shown in FIG. 4, a coating is applied to the surface of the wire 2' for the purpose of stabilizing the work during the welding operation, preventing rust and feeding. Due to the very small amount of the lubricating oil, the plastic reacts with the lubricating oil and deteriorates with time, especially in the lowermost layer of the winding start directly contacting the plastic spool 8.

As shown in FIG. 5, when the welding wire 2 'is wound around a plastic spool 8, the wire 2' is wound with a certain amount of tension when winding the wire 2 '. Therefore, a force that pushes the flange of the spool 8 is exerted to try to bite between them. When such a pushing force acts, the largest bending moment acts on the lowermost corner portion of the flange of the spool 8, so that the corner portion is deteriorated by the lubricating oil as shown in FIGS. There is a problem that cracks 13 are generated along the circumferential direction of the part, and in extreme cases, the flange of the spool 8 is separated.

The present invention solves the above-mentioned problems of the prior art, and prevents the lowermost layer of the spool from being deteriorated by the lubricating oil even if the product wire coated with lubricating oil is wound around a plastic spool. It is an object of the present invention to provide a spool winding welding wire that can be used.

[0007] The present invention relates to a welding wire wound on a plastic spool with lubricating oil applied to the surface thereof.
Of the welding wire wound up to the second layer of the plastic spool, at least the lowermost layer of the welding wire wound directly in contact with the plastic spool has a lubricating oil amount of 0.2. 0.5g / 10kg ・ It is a wire for spool winding welding, characterized in that it is a wire, and the lubricating oil amount of the upper layer thereafter is 0.5 g / 10kg ・ the normal lubricating oil amount exceeding the wire .

[0008]

According to the present invention, when a product wire coated with lubricating oil is wound around a plastic spool from the viewpoints of feedability and rust prevention of the welding wire, the plastic wire caused by the lubricating oil of the product wire is used. The object of the present invention is to prevent the deterioration of the material of the spool made of the material and to prevent the occurrence of the spool cracks caused by the deterioration of the material, thereby eliminating the adverse effect on the spool which is the storage member for the product wire.

That is, a small amount of oil from the welding wire coated on the surface deteriorates a plastic spool such as polypropylene or polystyrene due to a reaction with the lubricating oil, so that the corner portion extends along the circumferential direction. Although the cracks occurred, at least the second layer of the welding wire wound around the plastic spool during wire manufacturing, at least the lowermost layer of the product wire that is wound in direct contact with the plastic spool. By limiting the oil content,
The material deterioration of the plastic spool can be reduced, and the corner portion can be prevented from cracking.

[0010] Further, since the minimum oil amount necessary for ensuring the wire feedability at the time of welding is ensured, no trouble occurs in wire feeding at the time of welding.

[0011]

As shown in FIG. 4, a wire drawing material 2 is guided to a wire drawing machine 4 from a plurality of rollers 3 'installed on a supply stand 3, and drawn into a welding wire 2' having a predetermined product size. Is done. After that, it is wound on a plastic spool 8 set on a winder 7 via a tension control device 5 and an oil coating device 6 to be commercialized in the same manner as in the above-described conventional case.

In the present invention, the wire drawing machine 4 is used to solve the problem of cracking of the corner portion due to deterioration of the material of the plastic spool 8 due to the lubricating oil (also serving as rust prevention) applied to the surface of the welding wire 2 '. When the wire 2 ′ drawn by the wire is wound around the spool 8, as shown in FIG.
Of the product wire 2 ′ (shown by a black circle in the figure) of the lowermost layer, the amount of oil applied is higher than the normal amount of oil applied to the upper layer wire 2 ′ (shown by a white circle) by setting the control signal of the oiling device 6 This is to limit the number to be small. That is, at least the amount of oil applied to the lowermost product wire 2 ′ wound in direct contact with the spool 8 can be ensured at the time of welding, and the cracks due to deterioration of the material of the spool 8 caused by the oiling can be obtained. 0.2 to 0.5g / 10kg, which is the amount of oil applied to prevent wire.

It is sufficient that only the lowermost layer is sufficient to reduce the amount of oil adhering to the surface of the product wire 2 ′. More secure. The reason for this is that the oil moves slightly during long-term storage of the product wire 2 ′ by the spool 8, in order to prevent the effect.

In order to achieve the present invention, a control method interlocked with the oiling device 6 and the winder 7 is used.
By setting the oiling condition signal of the oiling device 6 to the low oil amount side when the length of one or two layers of the spool wound wire and a certain time or a certain winding speed corresponding thereto are achieved. It is wound on a spool 8. Alternatively, a wire chucking device 14 (see FIG. 2) that operates in conjunction with the wire drawing machine 4 or the winding machine 7 may be provided between the oiling device 6 and the winding machine 7.

That is, the wire chucking device 14 has a structure in which the felt 9 is mounted inside a pair of upper and lower holding members 10, and the hydraulic cylinder 11 is connected to a support arm 12 that supports the holding members 10. The product wire 2 ′ is once lubricated by the lubricating device 6 with the usual amount of lubrication. The length of one or two layers of the product wire 2 ′ wound around the spool 8 is determined by the operation of the hydraulic cylinder 11. Upper and lower pair of holding brackets
The product wire 2 ′ is sandwiched by the felt 9 and the lubricating oil on the surface is wiped off so that the amount of applied oil falls within the range between the lower limit and the upper limit.

In this manner, the lowermost layer of the spool 8 is wound up as a product wire 2 'having a small amount of oiling on the surface, and the subsequent upper layer is wound up as a product wire 2' having a normal oiling amount. The product is molded into the required height for product packaging. The purpose of applying oil to the wire surface is to improve the wire feedability during welding, so in this example, experiments were performed with various changes in the amount of oil applied to the wire surface. As a result, as shown in FIG. 3, the area satisfying both the wire feedability and the spool cracking is the wire surface oiling amount of 0.2 to 0.5 g / 10 k.
g ・ It was found to be in the range of the wire. For this reason, in the present invention, the second welding wire wound around the spool 8 is used.
As for the amount of oil applied to the product wire 2 'of the lowermost layer, which is wound in direct contact with the spool 8 at least among the layers, the lower limit is 0.2 g / 10 kg and the upper limit is 0.5 g / 10 kg.
・ Apply oil within the range of wire.

[0017]

According to the present invention, when the welding wire is wound on the plastic spool, the wire feeding property can be ensured for the product wire wound from the lowermost layer or the lowermost layer of the spool to the second layer. In addition, the amount of oil that can be prevented from cracking due to deterioration of the plastic spool material caused by oil coating is limited to a smaller amount than the other wire layers. For this reason, not only can the material deterioration and breakage of the plastic spool due to the attachment of excess oil be prevented,
Wire feedability, which is the original purpose of oiling, can also be ensured.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a plastic spool wound with a welding wire according to the present invention.

FIG. 2 is a side view showing a wire chucking device according to the present invention.

FIG. 3 is a graph showing an appropriate range of the amount of oil applied to the first layer (the lowest layer) based on the relationship between the amount of oil applied to the wire surface and the wire feedability.

FIG. 4 is a schematic side view showing a welding wire manufacturing facility.

FIG. 5 is an explanatory diagram showing a situation where a force acts on a flange of a spool when a welding wire is wound around a plastic spool.

FIG. 6 is a partially enlarged view showing a portion A in FIG. 5;

FIG. 7 is a perspective view showing the state of occurrence of cracks in a plastic spool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carrier 2 Wire drawing material 2 'Welding wire 3 Supply stand 3' Roller 4 Wire drawing machine 5 Tension control device 6 Oiling device 7 Winding machine 8 Plastic spool 9 Felt 10 Presser fitting 11 Hydraulic cylinder 12 Support arm 13 Cracking 14 wire chucking device

Claims (1)

(57) [Claims] 1. A welding wire wound on a plastic spool with lubricating oil applied to the surface thereof, wherein the welding wire wound on the plastic spool is a second layer of the welding wire. At least the lowermost layer of the welding wire wound directly in contact with the plastic spool should have a lubricating oil amount of 0.2 to 0.5 g / 10 kg. A spool winding welding wire characterized by a normal lubricating oil application amount exceeding 0.5 g / 10 kg / wire.