JPS60199566A - Winding method of welding wire - Google Patents

Abstract

PURPOSE:To feed smoothly a welding wire to a part to be welded by winding straightly the wire for the beginning, setting a transition region in the middle and changing the winding shape to twill line winding when the winding arrives at the transition region in the stage of winding the welding wire on a spool. CONSTITUTION:A welding wire is straightly wound for the beginning in the stage of winding the same on a spool. The straight winding is continued and when the winding arrives at the transition region (R) satisfying the equation, the winding shape is changed from the straight winding to twill line winding and thereafter the wire is wound with twill line. In the equation, R; the transition region where the winding shape is changed from straight winding to twill line winding (kg), d; the diameter of the welding wire (1mm.phi).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for winding a welding wire, and more particularly, to a method for winding a welding wire onto a spool so that the welding wire can be smoothly fed into a welded part.

Note that this welding wire A7 is used in consumable electrode welding, in which 002 gas or Ar-Co2 gas such as C02 gas arc welding and MIG welding is passed around as a shielding gas, and the wire is attached to the welded part in this welding wire. This includes wires used in gas-shielded arc welding, in which gas is fed and melted and fused by arc heat.

BACKGROUND Welding wire, for example, wire for gas-shielded arc welding, is generally sold and used in a state wound around a spool, reel, bobbin, pail can, or the like. Among these, what is commonly used is a winding shape called spool winding or reel winding (hereinafter referred to as spool winding), and many have a unit weight of 20 kl;

Here, if we consider a wire with a diameter of 1.2 mφ, 20 kg is a wire length of over 2000 m. When such a long wire of 300 klJ or 500 kl (75 kl) used in wire manufacturing is rewound from a bobbin to a spool or the like, problems such as wire tangles, small curls, and irregular windings occur.

Therefore, the inventors of the present invention paid attention to this problem and improved the winding condition so as to be suitable for spool winding of approximately 20 kl;l, which is commonly used.

In other words, the conventionally used spool winding is
In addition to resin products such as S resin and HIPS resin, iron products,
Wire is wound around a spool made of a material such as fiber in an aligned winding (the wires are wound in an orderly manner without crossing over each other) or in a twill winding (the wires cross each other at regular intervals).

The body and flange of the spool are usually made integrally with the dimensions shown in JIS Z3312, and the flange in particular needs to have enough strength to withstand the stress or lateral pressure that occurs when rewinding the wire. Various measures are required, such as an increase in the rim shape and flange thickness, which makes the spool expensive and increases the wire cost. However, even the spool manufactured with such care has the following problems.

In other words, if it is wound in an aligned manner, the final round (top stage)
In this case, since the flange spread is about 3 to 5 IilIl, there is a large gap between the wires in the upper layer, and there is a risk that the wires will fall into the lower part. Here, if the wire falls down for some reason, the wire is buried in the lower layer, which prevents smooth feeding when the wire is used, and in severe cases, makes feeding difficult.

This tendency is especially common in the upper part.

Therefore, in order to reduce this wedge, we
As described in Japanese Patent No. 19064, a method of winding the wire in a twisted manner has been considered. However, even with this method, the wedge-in phenomenon cannot be completely eliminated, and there are still other problems.

It differs from aligned winding in that the wires are wound across each other, so a slight bend occurs when the wire passes over the front wire. This phenomenon is caused by the lower 9
As a result of research conducted by the present inventors, it was found that many children were accepted at the beginning of the 417th volume. This seems to be because in the lower layer, the wire is overlapped many times on top of it, so the resultant force in the direction of the spool body due to the wire rewinding tension gradually increases.

Furthermore, if the product is left in the warehouse for a long time after rewinding,
It was confirmed that this tendency was accelerated by -■.

If this small bend occurs, even if it is very small, it will have a large effect on the subsequent welding process. In other words, since the wire passes through a feed tip whose inner diameter is only slightly larger than the wire, any slight bend in the wire increases feed resistance and degrades the stability of the arc.

Even if the traverse pitch and rewinding tension are controlled during the wire rewinding operation, the wires are piled up many times, so this tendency is noticeable in the lower layer.

Therefore, the present inventors studied the advantages and disadvantages of aligned winding and forced winding, and took full advantage of the characteristics of these rewinding methods to solve the above problems.As a result, the wire was less bent and wedged. The method for rewinding welding wire onto a spool was previously described.

The method of the present invention will be explained in detail below.

Generally, as mentioned above, as a method for winding welding wire around a spool, aligned winding and cross winding are used, and each has the following advantages and disadvantages.

In the case of aligned winding, the advantages are: (1) There is less occurrence of small curls (a state in which the wire is slightly twisted), (2) the wire rewinding bulk density is high, and the length of the spool flange can be short. (3) The appearance of the product must be clean.

Disadvantages include: (1) The stress applied to the wire flange is large and the flange widens; (2) the wire is easily wedged; (3)
) The winding disorder is likely to occur during rewinding, and the rewinding walk is reduced.

In the case of twill winding, the advantages are: (1) less force is applied to the spool flange and the amount of flange spreading is small, so the wire is less likely to become wedged, and (2) it is easier to automatically rewind the wire. Can be mentioned.

Disadvantages: (1) A small curl occurs in the upper layer (the beginning of winding the wire); (2) Since the bulk density of the wire is small, the flange height is higher than that of a normal spool, so the force applied to the flange is (3) The regular traverse interval of the wire becomes more disordered in the upper layer, resulting in violent winding.

Therefore, the inventors conducted a vibration test to investigate these phenomena in detail, and the results shown in FIGS. 1, 2, and 3 were obtained.

That is, this vibration test applies an amplitude of 10 cm to each spool.
Each of the tested wires 11 had 30 aligned and dovetail spools, and the vibration test was conducted 3000 times in consideration of truck transportation of the product. In addition, in this result, Fig. 1 shows the investigation of the occurrence of wire bite in aligned winding by wire diameter.
b) has a diameter of 0. haφ, (b) indicates a diameter of 1.2sφ, (c) indicates a diameter of 1.6mmφ, and (d) indicates a diameter of 2.4sφ. It can be seen from FIG. 1 that the range in which the wedge-in phenomenon occurs expands toward the lower Elaffl side as the diameter becomes smaller, and that it becomes more pronounced as the rewinding mWi increases. Figure 2 is 15
The figure shows the occurrence of bite in the winding, and it can be seen that the bite phenomenon is considerably less than in the case of aligned winding. Furthermore, Figure 3 shows the occurrence of small curls in cross-rolling, and many small curls occur in the early stages of rewinding.
It can be seen that as the diameter becomes smaller, the weight increases toward the higher weight side.

Note that no small curls were observed in the aligned winding.

In short, if we summarize the results of the study shown in Figures 1 to 3, we will generally get the results shown in Figure 4.In the aligned winding indicated by the dotted line with the symbol (8), the wire wedge phenomenon occurs on the higher weight side. On the lower weight side of the transition point (a), the wire wedge phenomenon does not occur, and no small curls are observed. On the other hand, in the case of cross-wrap shown by the solid line in symbol (B), no small bending or wire-biting phenomena are observed on the high-weight side, but as the weight shifts to the low-weight side, the transition point (b) becomes the boundary. Occurrence of small curls occurs.

Based on the above, in the present invention, the wire is re-wound using both aligned winding and criss-cross winding within the same spool, taking advantage of their respective advantages.

In other words, the area sandwiched between transition points (a) and (b) is defined as the transition area where aligned winding is changed to twill winding, and when this transition area is reached after starting rewinding as aligned winding, the area is aligned within this area. The winding is changed to twill winding, and the higher weight side is twilled to prevent the wedge-in phenomenon seen in aligned winding on the higher mm side.

Therefore, when we looked at the transition range of the timing of changing from aligned winding to cross winding in relation to the wire diameter of the welding wire, we found that the transition point (a
) is (8, Od'+ ) kg, and the transition point (b) is (2,5
d-A) kg, and its transition region (R) is as follows (1)
This was an area that satisfied the formula.

2.5d'≦R≦a, od'1 (1) However, R is the transition region where the winding shape changes from aligned winding to cross winding (
ku), d is the diameter of the wire A7 (approximately φ).

To explain in more detail, we will make effective use of the area shown in Fig. 4, and use the transition point (I]) (8, Od).At 41 kg or more, the wire wedge phenomenon occurs in the aligned winding, so it is possible to find a method that does not have this problem. Cover with twill.Furthermore, transition point (b)
If the winding is below (2,5d')kq, there will inevitably be a lot of small curls, so we use aligned winding, and (2,5d-'')kg ~ (8'
, Od" 1kQ transition region (Ill, there are few problems with either aligned winding or dovetail winding, and any winding shape is acceptable. Within this transition region (R), from aligned winding to necessary winding Change to volume.

In addition, as mentioned above, when rewinding, the weight of the wire can be measured by continuously measuring the mm of the wire itself at the time of rewinding, but it can also be measured by converting it from the length of the wire.

Next, examples will be described.

First, under the conditions shown in Table 1, wire was wound on the same spool according to the method of the present invention, starting with line winding, rewinding in the transition region in the middle, and then winding on the high weight side.

In addition, for comparison, the wire was wound in line and twisted as in the conventional example.

Next, a vibration test was conducted on 30 pieces of each of these three types of wound wires at a vibration frequency of 3000 times and an amplitude of 10 cm, and the results shown in Table 2 were obtained.

From Table 2, it can be seen that when the conventional wound wire is subjected to vibration, the wire becomes wedged in the wire and small curls occur. It was found that the wire feeding condition was stable without any problems such as these occurring.

As explained in detail above, the method of the present invention investigates and examines the problems of aligned winding and mandatory winding as wire winding shapes, eliminates areas that impede wire feeding, and transitions to an intermediate winding. The wire is re-wound by setting a range and effectively combining both winding shapes. Therefore, the characteristics of both winding shapes can be fully utilized, and the wire does not get wedged in the upper part as in the case of only aligned winding, and the wire does not curl in the lower part as in case of only cross winding.

[Brief explanation of the drawing]

Figure 1 is a graph showing the relationship between wire rewinding weight and wire retraction occurrence rate in aligned winding for each wire diameter, and Figure 2 is a graph showing the relationship between wire rewinding weight and wire retraction occurrence rate for each wire diameter. A graph showing the relationship between the occurrence rate. Figure 3 is a graph showing the relationship between the wire rewinding rim and the wire small twist occurrence rate in cross winding for each wire diameter. Figure 4 is a graph showing the relationship between the wire rewinding weight and the wire small twist occurrence rate. It is a graph showing the relationship between the symbol (A)...0.8uφ wire (B)...
...1.2uφ wire (c) ...1.6
uφ wire (d)...264 cabinetφ wire R
・・・・・・Transition area patent applicant Kawasaki Steel Co., Ltd. Agent Patent attorney Yoshikatsu Matsushita Lawyer Fumi Shima Vice Amount of wire winding in the anus or fur (9) Unit of wire Y in the sufur Color support amount (K9) Figure 4

Claims (1)

[Claims] When welding wire is wound onto a spool, it is first wound in an aligned manner, and when a transition ¥R (R) that satisfies the following formula is reached,
A method for winding welding wire characterized by changing the winding shape from aligned winding to must winding, and then twill winding. 2, sd-'4≦R≦s, od'4, where R: Transition Ift (kg) for changing the winding shape from aligned winding to twill winding d: Welding wire wire diameter (aφ)