JPS5861978A - Copper wire for welding electrode wire for can making - Google Patents

Abstract

PURPOSE:To eliminate a welding defect and breaking an electrode wire and to improve the performance of a can making machine by specifying the 0.2% yield strength of copper wires for welding electrode wires which are wound on both upper and lower electrodes in the joining parts of a can formed by rolling to a square shape in section by the can making machine. CONSTITUTION:A can of a relatively small size is made as the joining parts of a metallic sheet 1 formed to a can shape are welded between the electrode wires 3 which are wound in the hollow grooves of upper, lower electrode wheels 2, 2' in said joining parts by guiding rolls 6, 6'. The wires 3 consist of round copper wires 4 formed to a square shape in section by upper 1, lower rolls 5, 5'. Back tension is applied upon the wires by said forming, and the wires are wound in arrow directions are taken off by rolls 7, 7'. Here the conductivity of the wires 4 is set at >=100%, the tensile strength at 25-27kg/mm.<2>, the elongation at >=25%, and the 0.2% yield strength at 3.5-16.5kg/mm.<2>. If the 0.2% yield strength is below the lower limit, the deformation during welding of the wires 3 is large and there is an easy tendency toward generation of welding defects and wire disconnections. If said strength is in excess of the upper limit, the formability to a ssquare shape in section is degraded and good welding is degraded and good welding is no larger accomplished.

Description

Detailed Description of the Invention The present invention is a can manufacturing welding electrode wire for forming metal sheets into food cans, beverage cans, oil cans, and other miscellaneous cans with a relatively small diameter, and joining the joints by electric resistance welding. This relates to copper wire for use.

In general, small diameter cans of 1.81 mm or less are made by forming a metal sheet (1) into a can shape as shown in Figure jS1, and forming an electrode ring (2) with a curved groove on the top and bottom of the joint (wrap part).
(τ), an electrode wire (3) having a rectangular cross section is wound around the groove, and a lap portion is welded between the electrode wires (3). The electrode wire (3) differs slightly depending on the can making machine, but generally a round copper wire (4) with a diameter of 1.5 m is rolled in a pair of upper and lower rolls (5).
(5') to form an electrode wire (3) into a rectangular cross section with a width of 2.0 and a thickness of 0.85 cm.
), add pack tension to the guide roll (6),
(6') is used to hook the grooves of the electrode wheels (2), (2') in the direction of the arrow, and by pulling them off with the take-up rolls (7), (7'), both sides of the electrode II (31) are removed. The lap part is welded in between.

Conventionally, round copper wire (4) supplied to rolls (5), (5)
Annealed copper wire was used for the electrode rings (2) and (2'
) When passing through the electrode wire (3), the instantaneous temperature rises to 700℃ (welding conditions: 5V
) was not cured, such as amputation. In particular, cutting the electrode wire (3) significantly reduces the efficiency of the can making machine. Furthermore, in recent years, efforts have been made to improve welding speeds in order to improve the efficiency of can making machines, and there is a strong desire to develop copper wires for electrode wires that can withstand this.

In view of this, the present invention has discovered, as a result of divine research, that deformation and disconnection of electrode wires are influenced by 0.2% yield strength,
As a result of further research, we developed a copper wire for can manufacturing welding electrode wire.The copper wire is roll-formed into a rectangular cross section using a can making machine, and the upper and lower electrodes I at the can manufacturing joint part are turned. The copper wire used as the welding electrode wire in the section has a conductivity of 100% or more and a tensile strength of 25 to 27 KI as the copper wire supplied to the can making machine.
P/-1 elongation 25% or more, 2% yield strength 13.5 to 16.5
It is characterized by its sharpness.

That is, the present invention has electrical conductivity, tensile strength, elongation, etc. equivalent to conventional soft wires, and in particular, the 2% yield strength is 13.5-16.5!
/- makes it easier to form an electrode wire with a square cross section, prevents deformation during can manufacturing and welding as an electrode wire, and allows good welding to be obtained. The reason for limiting the range is as follows.

If the 0.2% proof stress is less than 13.5~/-, the deformation of the electrode wire as a roll-formed electrode wire with a rectangular cross section will be large;
Not only is it easier to cause welding defects, but the force is 16.514/
This is because if it exceeds -, the formability of forming into a rectangular cross section by roll forming will be reduced, making it impossible to obtain good welding.

The copper wire for can-made welding electrode wire of the present invention having such characteristics is manufactured as follows.

That is, as shown in FIG. 2, as in the conventional case, a rough drawn wire (8) is supplied from a supply m (91) and processed into a predetermined size through a continuous wire drawing machine 01.After passing this through an annealer aD and annealing it, When winding the coiler (13),
The annealed copper wire α is passed through the pre-roll α4 arranged in a staggered manner, or bent.
! As shown in Figure 4, g Nikola-a? J's capstan a
It is obtained by applying a bending process to the annealed copper wire Q3 using a rubber roll ae when winding the annealed copper wire Q3 around s. Note that it is desirable to use current annealing as the annealer Qll.

Hereinafter, the present invention will be described with reference to examples.

Example +11 The wire was drawn to a diameter of 1.5 m using a rough and drawn continuous wire drawing machine with a rough diameter of 81 wI by the method shown in Fig. 2, then current annealed, and then bent as shown in Fig. 3. In addition, a copper wire for can manufacturing welding electrode wire having the characteristics shown in Table s1 was manufactured. Note that conventional copper wires do not require bending.

Using these copper wires, as shown in FIG. 1, the thickness is 0.
A plate whose surface was coated with 90% 5N-10% 9 alloy was formed into a can shape with a diameter of 1001111 and a height of 150 mm, and the joints (width of joint 0.3) were welded. The welding conditions are also listed in Table 131. The welding was carried out under the welding conditions of 5V40GOA, with the electrode wire running speed, restraint, and welding speed set to 55 minutes.

As is clear from Table 1, the 0.2% yield strength is 13.5 to 1
6.5) The copper wire of the present invention with If/S could be easily formed into a rectangular cross section as an electrode wire, had little deformation during welding, and the welded portion was extremely good. On the other hand, comparative copper wire with a 0.2% proof stress of less than 13.5 KP/- can be easily formed into a square cross section as an electrode wire, but deformation during welding increases, the weld area deteriorates, and the electrode surface is 90%5n-10
% Pb alloy was observed to adhere.

In addition, it is difficult to make a comparison copper wire with a square cross section as an electrode wire with a 0.2% proof stress of more than 16.5KF/-.
Although the deformation during welding was small, the welded area had deteriorated.

Example (2) A can was welded in the same manner as in Example (1) using the inventive copper wire/I64 and the conventional copper wire/I67 shown in the m1 table, and the characteristics of the copper wire and electrode wire were evaluated. investigated. The results are shown in FIG. In the figure, T and 8 indicate tensile strength KP/-"
bO,2 is 0.2% yield strength (Kf/sm), HjLJ expansion (%), EC conductivity 111E rate (%lAC3), HVi'
! Hard Jt”e/i64 is the invention copper @4 in Table 181
64, A7 is the case of conventional copper wire/I67, and after the copper wire is made into an electrode wire with a square cross section, the fluctuations in various properties are very small in the copper wire of the present invention, which is the reason why good welding can be obtained. It becomes.

As described above, the copper wire of the present invention exhibits the remarkable effect that after it is made into an electrode wire with a rectangular cross section in a can making machine, the fluctuation in the wire properties of the electrode wire is small and extremely good welding can be performed. It is.

[Brief explanation of the drawing]

The $1 diagram is f! of the can making machine! gM An explanatory diagram showing the running process of the electrode wire, Figure 2 is an explanatory diagram showing the manufacturing process of the conventional copper wire for welding electrode wire, and Figure IJ3 is an example of the main part in the manufacturing process of the copper wire for welding electrode wire of the present invention. Figure 184 is an enlarged explanatory diagram of another example of the manufacturing process of the copper wire for welding electrode wire of the present invention.The fifth factor is the difference between the copper wire of the present invention and the conventional copper wire. This is an explanation of the change in characteristics. 1. Metal sheet, turtle τ electrode ring 3. Electrode wire 4, - wire \da roll 6, 6' guide roll 7, τ take-up roll 8. Arahiki line 9. Supply Ki 10, continuous wire drawing @ 11. Annealer-121
Winder 13, copper wire 14. Pridele a-
Le 15 Capstan 17, Rubber roll Figure 1 Figure 2 (6) 4/A) () 1 Horse (, u#lAl/6) 4) ``OJ'S'1 procedural amendment!) (Voluntary) 1981 December 22nd, Haruki Shimada, Commissioner of the Japan Patent Office, 1, Indication of the case, 1981 Patent No. 11a'1A161572, 2, Name of the patent for canned welding electrode wire, Wire 3, Person making the amendment, Relationship with the case, Patent application Address: 2-6-1 Marunouchi, Chiyoda-ku, Tokyo.
Name (529) KofiiJ'IIK Industrial Co., Ltd. 4, Agent 1'%J;-. i:, M';>' Contents of amendment 1: In the first line of the first page of the specification, the word "details" is corrected to "specification." 2. Claim V Attachment 1) Correction. 3. In the detailed description of the invention, page 3, t11%, lines 9 and 12, the words "2% yield strength" are replaced by 10.2%.
"Yield strength" is corrected. Claims: ``A copper wire roll-formed into a rectangular cross-section by a can-making machine and passed around both upper and lower electrode rings of a can-making joint, and used as a welding electrode wire at a can-making joint; Copper wire supplied to the machine with #electricity of 100% or more and tensile strength of 25 to 27 kg/
A copper wire for can manufacturing welding electrode wire, characterized by having an elongation of 25% or more and a 0.2% proof stress of 13.5 to 165/-. ”

Claims (1)

[Claims] Copper wire is roll-formed into a rectangular cross-section using a can-making machine, and then passed through the upper and lower electrode wheels of the can-making joint. As a wire, electrical conductivity is 100% or more, tensile strength is 25 to 27 KP/-
1 elongation 25% or more, 2% proof stress 13.5-16.5Kp/
- Copper wire for can manufacturing welding electrode wire characterized by -9