JPS5550968A - Plasma arc welding starting method - Google Patents

Plasma arc welding starting method

Info

Publication number
JPS5550968A
JPS5550968A JP12286378A JP12286378A JPS5550968A JP S5550968 A JPS5550968 A JP S5550968A JP 12286378 A JP12286378 A JP 12286378A JP 12286378 A JP12286378 A JP 12286378A JP S5550968 A JPS5550968 A JP S5550968A
Authority
JP
Japan
Prior art keywords
arc
pilot arc
pilot
welding
gas
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
JP12286378A
Other languages
Japanese (ja)
Inventor
Yoshiro Awano
Junji Hori
Akitsugu Sasazaki
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP12286378A priority Critical patent/JPS5550968A/en
Publication of JPS5550968A publication Critical patent/JPS5550968A/en
Pending legal-status Critical Current

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  • Arc Welding Control (AREA)

Abstract

PURPOSE: To surely transfer the pilot arc of plasma welding to the main arc and eliminate welding interruption or the like by simultaneously increasing plasma gas or pilot arc current value immediately before the shift to the main arc at the producing of the pilot arc.
CONSTITUTION: In the case of a pilot arc intermission system of plasma welding, the plasma gas flow B is flowed at V1l/mm upon welding start. The V1l/mm is made larger (V1=1.2W4V2) than the flow (broken line) of conventional methods and the gas flow V2l/mm at the execution of welding. At the same time, high frequency waves are applied between the electrode and restrained chip to apply a pilot voltage and produce pilot arc. The increased plasma gas does not stagnate between the electrode and restrained chip and the pilot arc arrives at the objects to be welded, thus surely shifting to the main arc. In the case of a continuous system of the pilot arc, the specified quantity of the pilot arc current is increased simultaneously with gas quantity and the shift to the main arc is made sure by the synergistic effect thereof, thus the starting failure occuring in the gas stagnation of conventional methods is eliminated.
COPYRIGHT: (C)1980,JPO&Japio
JP12286378A 1978-10-05 1978-10-05 Plasma arc welding starting method Pending JPS5550968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12286378A JPS5550968A (en) 1978-10-05 1978-10-05 Plasma arc welding starting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12286378A JPS5550968A (en) 1978-10-05 1978-10-05 Plasma arc welding starting method

Publications (1)

Publication Number Publication Date
JPS5550968A true JPS5550968A (en) 1980-04-14

Family

ID=14846492

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12286378A Pending JPS5550968A (en) 1978-10-05 1978-10-05 Plasma arc welding starting method

Country Status (1)

Country Link
JP (1) JPS5550968A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60111770A (en) * 1983-11-19 1985-06-18 Daido Steel Co Ltd Plasma overlay welding method
JPS6163366A (en) * 1984-09-03 1986-04-01 Hitachi Seiko Ltd Plasma cutting equipment
JPS61276768A (en) * 1985-05-31 1986-12-06 Toa Seiki Kk Ignition method for main plasma arc in non-key hole type plasma arc welding
JPS63194867A (en) * 1987-02-06 1988-08-12 Nippon Steel Weld Prod & Eng Co Ltd How to generate a pilot arc in a plasma torch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5089237A (en) * 1973-12-11 1975-07-17
JPS5244584U (en) * 1975-09-23 1977-03-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5089237A (en) * 1973-12-11 1975-07-17
JPS5244584U (en) * 1975-09-23 1977-03-29

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60111770A (en) * 1983-11-19 1985-06-18 Daido Steel Co Ltd Plasma overlay welding method
JPS6163366A (en) * 1984-09-03 1986-04-01 Hitachi Seiko Ltd Plasma cutting equipment
JPS61276768A (en) * 1985-05-31 1986-12-06 Toa Seiki Kk Ignition method for main plasma arc in non-key hole type plasma arc welding
JPS63194867A (en) * 1987-02-06 1988-08-12 Nippon Steel Weld Prod & Eng Co Ltd How to generate a pilot arc in a plasma torch

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