JPS62158571A - Welding wire contained in pail pack - Google Patents

Abstract

PURPOSE:To feed smoothly a wire to a weld zone by setting an open angle of a bent part of a taking-out terminal wire of a welding wire, to above a prescribed angle which is determined by a yield stress of the wire, and a diameter of the wire. CONSTITUTION:A wire W which has been held upward from the lower face of a wire laminated body 2 in a pail pack 1, and has been stretched out of an inner hole 4 of a holding member 3 is fed to a weld zone through a feed chip 5, etc. In this case, bent parts A (B) are spread out to the right and left, and moved. In said part, the feed chip part is the narrowest, therefore, in this part, a deformation resistance against an expansion of the bent parts A (B) becomes maximum. In order to reduce a feed resistance of the wire by this resistance, open angles theta (thetaa, thetab) of the bent parts A (B) are enlarged as shown by an equation. In this regard, (y) and (d) denote a yield stress (kgf), and a wire diameter (mm), respectively. In this way, an adverse influence exerted on a feeding property of the bent part, of a taking-out terminal wire E can be solved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to welding wires stacked and stored in a pail pack.

[Conventional technology and problems]

In order to improve the efficiency of welding work, the welding wire is taken out and the terminal wire is guided upward along the outer circumferential surface of the wire stack and extends above the restraining member. There is known a welding wire in a pail pack that allows welding to be continued by taking out the wire from the pail pack.

As a conventional treatment for the take-out termination wire in this type of technology, (1) the termination wire is arranged in a spiral on the outer peripheral surface of the wire stack (Japanese Patent Laid-Open No. 59-220287).

■ Lead the termination wire straight upward from the bottom of the pail pack (Publication No. 60-1583). etc.

In case ①, the wire does not bend or deform plastically at the upper and lower ends of the wire stack, but as a result of the terminal wire between the upper and lower ends of the wire stack being too long, the wire removal state changes between the pail packs. There is a disadvantage that the terminal wires become loose and tend to get tangled and tangled when doing so.

In the case of (), contrary to the case (■), the amount of terminal wire between the upper and lower ends of the wire stack is minimal, and the transition to the takeout state is smooth, but the degree of bending of the wire at the upper or lower end of the wire stack is It is large, and the wire has an almost right-angled bend.
As a result, the bent portion of the wire gets stuck during the wire feeding route, especially at the power feeding tip, which deteriorates the feeding condition and, in the worst case, causes the feeding to stop.

[Means and effects for solving the problems] The present invention has been made in order to solve the problems of the above-mentioned prior art.
The gist of this is a welding wire packed in a pail pack in which the terminal wire of the welding wire is guided upward along the outer peripheral surface of the wire stack and extends above the restraining member. A welding wire in a pail pack is characterized in that the opening angle θ of the wire at the bent portion is within the range expressed by the following formula.

θ≧0.33 y + 26 d + 72 The present invention will be explained below with reference to the drawings. Figure 1 is an overall perspective view (partially broken) of welding wire in a pail pack.
The wires are twisted into the inside (for example, stacked and housed in a 300°/1 loop configuration), and an annular restraining member 3 is placed on the top surface of this wire stack 2 to prevent the wires from jumping up. 2 shows the starting end wire of the welding wire pulled out from the top surface of the wire mFA body 2 and fixed to the side wall of the pail pack, and E shows a restraining member that guides the welding wire upward from the bottom surface of the wire laminate 2 along the outer peripheral surface of the laminate 2. 3 shows the welding wire output terminal wire extending from the wire output inner hole 4 and fixed to the side wall of the pail pack.The terminal wire E is arranged at an angle on the outer circumferential surface of the laminate 2 as shown in the figure. , A and B indicate the bent portions of the terminal wire E at the upper and lower end positions of the laminate 2, respectively, and θa and θb indicate the opening angles of the wire at the bent portions A and B. Wire Et - The welding wire packed in a pail pack is plastically deformed at the bent portions A and B of the terminal wire E, which improves the wire feedability when the welding wire is taken out of the pail pack and used for welding. No significant impact on quality.

This will be explained with reference to FIG.

FIG. 2 is an explanatory diagram showing a state in which the bent portion of the terminal wire passes through the power supply chip, and for convenience of explanation, the hole diameter of the power supply chip is made larger than the diameter of the wire. The wire W taken out from the pail pack is a conduit tube, a torch,
and is sent to the welding part via the power supply tip 5. At this time, the bent part A (B) moves while being pushed outward to the left and right as shown in the figure, but since the part of the feeding tip 5 in the feeding path is the narrowest, the bent part A (B) expands at this part. The deformation resistance against is maximized. That is, in order to obtain good wire feeding performance, it is necessary that the wire feeding force overcomes the deformation resistance of the bent portion A (B) in the power feeding tip 5.

To reduce the wire feeding resistance due to the deformation resistance of the bent portion, ① Increase the wire feeding force. ■Increase the hole diameter of the power supply chip. ■Opening angle θa of bent part A (B). θ
Measures such as increasing b can be considered, but in the case of ■, the wire will be easily deformed by the pressing force of the feeding roller, and
In this case, it is difficult to supply power to the wire.In the end, the present inventors adopted the method (2).

The explanation will be given again with reference to FIG. As the amount of welding wire is gradually reduced and the holding member 3 is lowered, the bent portion A holds down the taken-out terminal wire E, which is inclined on the outer peripheral surface of the wire stack 2. As it engages with the member 3 and moves to the left in the figure, the overall degree of inclination becomes smaller (the state indicated by the dotted line in the figure). In the process of taking out the wire, some bending will occur in the wire between the bends A and B, but even if it is a bend within the elastic range or a plastic surface, it will not be a problem because it is slight. Bending part A. B opening angle θa. By setting θb to hll, it is possible to reduce the wire feeding resistance described above.

The present inventors experimentally determined the allowable range of the opening angle θ (θa, θb) of the bent portion of the terminal wire in order to obtain good wire feeding performance. The opening angle θ is the yield stress (descending stress) of the wire as y(Kgf
), and it was confirmed that good wire feedability could be achieved if the wire diameter was within the angle range expressed by the equation θ≧0.33y+26d+72, where d(+u). FIG. 3 is a diagram showing the relationship between the opening angle of the bent portion of the terminal wire, the yield stress of the wire, and the wire diameter. Line I in the figure.

II, I[[, IV are each wire diameter 0.9.
1.2. The case of 1.6° 2.0 dragon is shown, and the area above the line indicates a good feedability area, and the area below the line indicates a poor feedability area. As can be seen from the figure, the larger the wire diameter (indeed, the larger the yield stress of the wire), the narrower the range of good feeding performance.

For example, when the yield stress of the wire is y=tooKgr, the opening angle θ of the wire is 128° for each of the wires with the wide diameter d=0.9, 1.2, 1.6, and 2.0.

If the angle is within the range of 136°, 147°, 157° or more, the bent portions A and B of the terminal wire will smoothly pass through the power feeding chip, resulting in good wire feeding performance. Also, the wire diameter is 1.2 and the yield stress y=60.80.100,120K for the crane wire.
The wire opening angle θ is 123° and 130″ for each case of gf, respectively.

If the angle is within the range of 136°, 143° or more, the wire feedability will be good. The welding wire used in the experiment was a mild steel wire, and the wire feeding conditions were a wire take-out speed of 10 m/min, and the wire was placed 3 Qcm above the outside of the pail pack.
The welding tip was passed through a 3 m long conduit tube with an introduction hole installed in the welding torch by a wire feeding mechanism installed on the welding torch side.

In the present invention, the degree of plastic bending that inevitably occurs in the terminal wire taken out of the welding wire in the pale pack is regulated, that is, the opening angle of the bending portion is set to be equal to or greater than a predetermined angle determined by the yield stress of the wire and the wire diameter. By storing the wires in layers in the pail pack, the bent portion of the wire does not get caught in the power supply chip when the wire is taken out, and the wire can be smoothly fed to the fH section.

This plastic bending part of the terminal wire may not necessarily be in two places as in the example shown in Fig. 1 depending on the loading form of the welding wire in the pail pack. If it is not passed through, it will be at one location at the bottom end of the laminate.

Note that it is also possible to take measures such as locally annealing the terminal wire portion, or preparing a separate wire for the terminal wire and connecting it to the main wire. By lowering the yield stress of
The allowable lower limit value of the opening angle θ of the wire at the bending portion can be lowered.

〔Effect of the invention〕

Since the welding wire in a pail pack of the present invention is constructed as described above, the bending part of the terminal wire taken out of the welding wire stacked and stored in the pail pack has a negative effect on wire feeding performance. and there are not too many trays of termination wires between the top and bottom ends of the wire stack.
Trouble when taking out the part is also eliminated.

[Brief explanation of drawings]

Figure 1 is an overall perspective view of welding wire in a pale pack (
Fig. 2 is an explanatory diagram showing the state in which the bent part of the terminal wire passes through the power supply chip, Fig. 3 shows the opening angle of the bent part of the terminal wire and the yield stress of the wire, It is a figure showing the relationship with wire diameter. l... Pail pack, 2... Wire laminate, 3
... Suppressing member, 5... Power supply chip, A, B.
...Bending part, E...Take-out terminal wire, W...
Welding wire.

Claims (1)

[Scope of Claims] A welding wire contained in a pail pack, in which a terminal wire taken out of a welding wire is guided upward along the outer circumferential surface of a wire laminate and extended above a restraining member, the terminal wire being A welding wire in a pail pack, characterized in that the opening angle θ of the wire at the bent portion is within the range expressed by the following formula. θ≧0.33y+26d+72 [However, θ: Wire opening angle (°) y: Descending stress (Kgf) d: Wire diameter (mm)]