Claims
- 1. A method of splicing metal webs, wherein ends of a leading metal web and a following metal web are weldedly spliced together at a splicing portion comprising the steps of:
- arc-weldedly splicing said metal webs by use of a nonconsumable welding electrode, a discharge forming portion of said electrode being of a conical tapered shape and having a flat portion formed at a forward and thereof, with said electrode and said metal webs being in a non-contact condition with respect to each other during arc initiation;
- raising the arc current of said electrode soon after the arc initiation to a value higher than a welding current value which is set in accordance with the thickness of said metal webs, and thereafter lowering the arc current to the welding current value; and thereafter
- rolling the spliced portion.
- 2. The method of splicing metal webs as set forth in claim 1, wherein the diameter of said flat portion of said welding electrode is 0.6 mm or greater.
- 3. The method of splicing metal webs as set forth in claim 1, wherein said metal webs are aluminum plates.
- 4. A metal web splicing apparatus wherein ends of a leading metal web and a following metal web are weldedly spliced together at a splicing portion comprising:
- a nonconsumable welding electrode having a discharge forming portion which is of a conical tapered shape and a flat portion formed at the forward end thereof, said electrode and said metal webs being in a non-contact condition with respect to each other during arc initiation;
- an arc current controller that raises the arc current of said electrode soon after the arc initiation to a value higher than a welding current value which is set in accordance with the thickness of said metal webs, and thereafter lowers the arc current to the welding current value; and
- a rolling device for rolling said splicing portion.
- 5. The metal webs splicing apparatus as set forth in claim 1, wherein the diameter of said fiat portion of said welding electrode is 0.6 mm or greater.
Priority Claims (3)
Number |
Date |
Country |
Kind |
1-20534 |
Jan 1989 |
JPX |
|
1-32292 |
Feb 1989 |
JPX |
|
1-33313 |
Feb 1989 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 08/132,215 filed Oct. 6, 1993, now abandoned which is a continuation of application Ser. No. 007/892,737 filed Jun. 1, 1992, now abandoned which is in turn a continuation of application Ser. No. 07/771,854 filed Oct. 7, 1991, now abandoned, which is in turn a continuation of application Ser. No. 07/470,657 filed Jan. 26, 1990, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (5)
Number |
Date |
Country |
203328 |
May 1959 |
DEX |
1196807 |
Jul 1965 |
DEX |
1465030 |
Jan 1969 |
DEX |
3824698 |
Feb 1989 |
DEX |
1141112 |
Jan 1969 |
GBX |
Non-Patent Literature Citations (1)
Entry |
T. Lyman, ed., Metals Handbook, 8th edition, vol. 6, Welding and Brazing, 1971, pp. 113 and 118-120. |
Continuations (4)
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Number |
Date |
Country |
Parent |
132215 |
Oct 1993 |
|
Parent |
892737 |
Jun 1992 |
|
Parent |
771854 |
Oct 1991 |
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Parent |
470657 |
Jan 1990 |
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