JPS5568179A - Plasma arc starting method - Google Patents

Plasma arc starting method

Info

Publication number
JPS5568179A
JPS5568179A JP13986978A JP13986978A JPS5568179A JP S5568179 A JPS5568179 A JP S5568179A JP 13986978 A JP13986978 A JP 13986978A JP 13986978 A JP13986978 A JP 13986978A JP S5568179 A JPS5568179 A JP S5568179A
Authority
JP
Japan
Prior art keywords
current
gas
arc
time
main
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
JP13986978A
Other languages
Japanese (ja)
Inventor
Minoru Shimada
Yuji Obara
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.)
Via Mechanics Ltd
Original Assignee
Hitachi Seiko Ltd
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 Hitachi Seiko Ltd filed Critical Hitachi Seiko Ltd
Priority to JP13986978A priority Critical patent/JPS5568179A/en
Publication of JPS5568179A publication Critical patent/JPS5568179A/en
Pending legal-status Critical Current

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  • Arc Welding Control (AREA)

Abstract

PURPOSE: To suppress the production of double arcs at the starting of main arc and prevent damaging of nozzle by adding dissimilar operating gas after the start of the plasma arc produced in the operating gas flow.
CONSTITUTION: Operating gas PG is beforehand supplied and a main arc 4 is produced at the welding work start point a. While the main current thereof is being detected, the current is shifted from the cutting start current Ip1 of small current to plasma cutting main current Ip. This current shifting involves increasing the current from the current Ip1 to the current Ip during the slow up time Ta and this time Ta is arbitrarily variable. For the gas PG, the operating gas of the same gas is supplied as the initial operating gas PG1 and at the time a, the second operating gases PG2 and PG3' are increased within the shift mode range of the time Ta. Namely, the gas PG is increased in the small current region and therefore rapid unstabilizing of the arc is obviated and the stable main arc shifting and the prevention of the formation of double arcs 6, 6' are accomplished. In the figure, 1 denotes a torch, 2 an electrode, 3 a base metal and 5 a nozzle, respectively.
COPYRIGHT: (C)1980,JPO&Japio
JP13986978A 1978-11-15 1978-11-15 Plasma arc starting method Pending JPS5568179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13986978A JPS5568179A (en) 1978-11-15 1978-11-15 Plasma arc starting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13986978A JPS5568179A (en) 1978-11-15 1978-11-15 Plasma arc starting method

Publications (1)

Publication Number Publication Date
JPS5568179A true JPS5568179A (en) 1980-05-22

Family

ID=15255441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13986978A Pending JPS5568179A (en) 1978-11-15 1978-11-15 Plasma arc starting method

Country Status (1)

Country Link
JP (1) JPS5568179A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009095843A (en) * 2007-10-15 2009-05-07 Daihen Corp Method of controlling arc start in plasma arc welding

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931562A (en) * 1972-07-25 1974-03-22
JPS53119252A (en) * 1977-03-29 1978-10-18 Origin Electric Plasma arc cutting start method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931562A (en) * 1972-07-25 1974-03-22
JPS53119252A (en) * 1977-03-29 1978-10-18 Origin Electric Plasma arc cutting start method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009095843A (en) * 2007-10-15 2009-05-07 Daihen Corp Method of controlling arc start in plasma arc welding

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