JPS59101278A - How to lock the beginning and end of welding wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding wire filled with 7 sixes and a method of locking a starting end and a terminal end of a solid welding wire to a wrapping body.

Generally, various welding wires for welding (hereinafter abbreviated as wires)
is used in winding bodies such as spool winding, bobbin winding, and bank winding (pail pack loading). When these wires are fed during welding, this is due to the contact resistance within the conduit cable and the feed roller.

To avoid plastic deformation due to pressure resistance, etc., the degree of work hardening during wire drawing was controlled to 70 kg/rn.
Tensile strength of m2 or more usually 90-120 kg/mm2
) has been adjusted. Therefore, the wire in the above-mentioned winding body is bent and locked at the starting end, and since the wire is elastically deformed at the end of the winding, the wire will not come apart due to its elastic restoring force. It is necessary to fix the material by anchoring it because it may become twisted or tangled, causing problems in welding.

Techniques for locking the starting and ending ends of the wire (for example, see FIG. 2 0), as shown in (b), the end of the wire W is fixed in the hole 4 formed in the body 2 of the spool 1 or the flanone 3. ，
5 and is bent and locked.

All conventional wire locking methods involve bending and deforming a straight wire as described above, so 7Q
For wires with high tensile strength of kg/mm' or more,
It was difficult to bend, and the bent part could become brittle, making it difficult to lock. In particular, Figure 1 fal, (b
As shown by 1 and fclc, the bent portion frequently broke in small-diameter solid wires with small cross-sectional areas and wires made of flux.

The present invention was made in view of the above points, and the tensile strength of the entire welding wire remains high at about 7Qkg/mrn2 or more, and only the locking part is relatively soft, and the bending is caused by deformation. No embrittlement or breakage - As a result of various studies on locking methods, we found that by annealing only the predetermined length necessary for locking the starting and terminal ends of the welding wire, welding wire can be easily locked without breaking. I have discovered what is possible.

Next, examples of the present invention will be described in detail.

Figure 1 (al, (bL) (C1 shows a cross-sectional example of the wire used in the method of the present invention, (al is a solid wire with a relatively small diameter, (b) is a vibro formed by forming a steel strip into a circle, and A flux-cored wire made by filling the inside with flux 7 and welding the butt parts 8, (C1 is a steel strip 9
This is an example of a flux-cored wire made by folding and forming a wire into a complicated cross-sectional shape and filling the inside with franks.

In the present invention, in the above wire, a predetermined length of the starting end and the ending end, which will become the locking part, is annealed in advance, and the starting end and the ending end are bent and locked to a winding body such as a spool. It is. The annealing process softens a predetermined length of the starting and ending parts, making it easier to lock and less likely to break. The locking method is the same as before, and an example is shown in Figure 2 (
An appropriate bending locking method as shown in (a) and (b) may be adopted.

That is, in FIG. 2(a), the wire starting end W1 is inserted into the hole 4 provided in the spool body 2 and bent in two stages in opposite directions, and the terminal end W2 is inserted into the hole 5 provided in the spool flange 3.
They are bent and locked in place. In FIG. 2 (b), the starting end Wl of the wire passed through the hole 4 of the body 2 is inserted in the same direction.
It is bent into steps to form a P-shaped locking part for locking. In either case, the bent portions at the beginning and end of the wire are rolled and annealed.

FIG. 3 does not show an example of an annealing device for annealing a predetermined length of the starting and ending portions of the wire. In this example, the wire is heated by direct current heating, and the annealing power is input from the input terminal 17, transformed by the transformer 18, and output terminal 12.
13. The output terminal is composed of a fixed terminal 12 and a movable terminal 3, and the annealing section of the wire can be adjusted. The current flowing through the wire IIK is adjusted by the current adjustment dial 16, and the energization time is controlled by the timer switch 15, so that the optimum temperature of 2 hours is selected depending on the material and size of the wire. For example, the cut portion of the swaged wire 11 (this portion will become the terminal end and the starting end of the wire) is held against the upper surface of the annealing device by a presser plate 19 as shown in FIG. 3, and then the output terminals 12 and 13 are simultaneously Lifting lever 1
Step 4 is lowered, and the wire is energized for a predetermined period of time to perform processing. Note that 20 is an insulator provided below the wire 11.

The present inventors used the above-mentioned annealing equipment to produce a commercially available tar
welding wire (12mmφ, tensile strength 92kg/mm
2+ elongation rate 16%) and a seamed wire (1.2 mmφ・0.
3 mm thick, tensile strength 73 kg/mm2+, elongation rate 8%) was annealed under the conditions shown in Table 1. In addition, the tensile strength is the result determined using an Amsler type tensile tester, and the elongation rate is the result of determining the wire (with a mark for each ICIn).
This figure was obtained by measuring the length of a 1 cnL portion of the fractured portion after the fracture. The tensile strength of flux-filled wire is based on the total cross-sectional area.

Table 1 Method of measuring the tensile strength and elongation of the wiping wire When the tensile properties of the wire after annealing the heated part were measured using a press, the tensile strength of the solid wire was 55 kq/m.
m2. The elongation rate was 24%, and the flux-filled wire had a tensile strength of 43 kg 7 mm2 (relative to the total cross-sectional area) and an elongation rate of 18%, both of which were softened.

Next, in order to compare the bending deformation and breakage resistance of the wires before and after annealing obtained under the above conditions, a 10cIrL unit wire was bent at approximately 90°, this was repeated to determine the number of times it broke, and the results were It is shown in Table 2.

Table 2 These experimental results show that the annealed part has softened and its bending deformation and breakage resistance has increased significantly compared to before annealing, making it easy to bend and difficult to break even when bent. I understand.

In addition to the direct energization method described in the examples, there are various annealing methods, such as a heating furnace insertion method and an induction heating method. The annealing device described above can be a stand-alone device, but it can also be built into a wire winding device.Furthermore, the annealing atmosphere is atmospheric air in the example. Although some oxidation occurred, this is not a problem because in practice this part is often removed before use.However, for the sake of appearance quality or if you wish to use the annealed part as well, it is necessary to remove the reducing property. It goes without saying that annealing in an atmosphere is sufficient.

Furthermore, since the terminal end of a packaging unit of a wire in the continuous state [6] is the starting end of the next packaging unit, it goes without saying that the predetermined annealing length is the sum of both.

As described above, according to the method of the present invention, the starting end and the terminal end of the wire can be easily locked to the winding body, and there is almost no breakage of the wire at this locking part, so that the wire can be wired with high efficiency and with no waste. Can perform winding and locking work.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a welding wire to which the present invention is applied, where (al is a solid wire, tb+ and (C1 are examples of Franks filled wire). Fig. 3 is an explanatory diagram showing an example of the wire annealing device used in the present invention. ■... Spool, 2... Body, 3... Furanone, 4.5...hole, 6...nokuib,
7...Flux, 8...Welded part, 9...Strip steel, W, 11...Wire, 12.13...Output terminal,
14... Elevating/lowering reno (-115, 16... Dial, 17... Input terminal, 18... Transformation sound μ, 19...
...Wire presser, 20...Tomoyuki Yafuki, patent attorney representing the insulator patent applicant (and one other person) -:

Claims (1)

[Claims] In a method for locking the ends of a flux-filled welding wire and a solid welding wire, a predetermined length of the starting end and the terminal end of the wire is annealed in advance, and this treated portion is bent to engage the wrapping body. A method for locking the starting and ending parts of a welding wire.