JPS57199562A - Automatic welding method - Google Patents

Automatic welding method

Info

Publication number
JPS57199562A
JPS57199562A JP8379981A JP8379981A JPS57199562A JP S57199562 A JPS57199562 A JP S57199562A JP 8379981 A JP8379981 A JP 8379981A JP 8379981 A JP8379981 A JP 8379981A JP S57199562 A JPS57199562 A JP S57199562A
Authority
JP
Japan
Prior art keywords
groove
torch
welding
preheating
plasma arc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8379981A
Other languages
Japanese (ja)
Inventor
Nobuo Mizuhashi
Sakuo Hatanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP8379981A priority Critical patent/JPS57199562A/en
Publication of JPS57199562A publication Critical patent/JPS57199562A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting

Abstract

PURPOSE:To form sound weld beads free from lack of penetration and cracks in welding a narrow groove by AC welding by providing a preheating plasma torch ahead in the welding advance direction of a welding torch and preheating the groove. CONSTITUTION:In the stage of welding the narrow groove 3 of base materials 1, 1 with an AC welding torch 4, a preheating plasma arc torch 7 is provided <=30cm ahead of the torch, and while the groove 3 is preheated with a plasma arc 8, the groove is welded with the torch 4. Alternating magnetic fields 6 which are in parallel with the surfaces of the base materials and are roughly vertical to the groove line direction are formed around the torch 4. The plasma arc 8 of the torch 7 is deflected alternately back and forth along the groove 3 by the effect of such alternating magnetic fields to provide a spreading of length l, and since the groove can be heated without melt-down of the groove, the beads 2 by the subsequent AC welding are kept free from lack of penetration and cracking.
JP8379981A 1981-06-02 1981-06-02 Automatic welding method Pending JPS57199562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8379981A JPS57199562A (en) 1981-06-02 1981-06-02 Automatic welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8379981A JPS57199562A (en) 1981-06-02 1981-06-02 Automatic welding method

Publications (1)

Publication Number Publication Date
JPS57199562A true JPS57199562A (en) 1982-12-07

Family

ID=13812695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8379981A Pending JPS57199562A (en) 1981-06-02 1981-06-02 Automatic welding method

Country Status (1)

Country Link
JP (1) JPS57199562A (en)

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