JPS5731490A - Tube end welding device - Google Patents

Tube end welding device

Info

Publication number
JPS5731490A
JPS5731490A JP10500880A JP10500880A JPS5731490A JP S5731490 A JPS5731490 A JP S5731490A JP 10500880 A JP10500880 A JP 10500880A JP 10500880 A JP10500880 A JP 10500880A JP S5731490 A JPS5731490 A JP S5731490A
Authority
JP
Japan
Prior art keywords
tube
rod
electrode
welding
shielding 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
JP10500880A
Other languages
Japanese (ja)
Inventor
Koichi Akutsu
Masahito Saiki
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.)
Hitachi Ltd
Hitachi Machinery and Engineering Ltd
Original Assignee
Hitachi Ltd
Hitachi Machinery and Engineering 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 Ltd, Hitachi Machinery and Engineering Ltd filed Critical Hitachi Ltd
Priority to JP10500880A priority Critical patent/JPS5731490A/en
Publication of JPS5731490A publication Critical patent/JPS5731490A/en
Pending legal-status Critical Current

Links

Landscapes

  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

PURPOSE: To prevent generation of nitrides and oxides inside of a tube in welding a tube plate and a tube end jetting shielding gas by inserting a center rod provided with a groove on outer circumference into the tube.
CONSTITUTION: When welding, centering of an electrode 4 is made in the first place to maintain the distance between the electrode 4 and a tube plate 1 and that between the electrode 4 and a tube 2. After completion of centering, a center rod is rotated and at the same time, an arc is generated from the electrode 4. Tube end welding of the tube plate 1 and tube 2 is conducted while jetting shielding gas 5 such as Ar etc. from the torch 7. During the while, the shielding gas 5 from the torch 7 is let flow into a groove 3c on the rod 3 as inflow gas 5a to form a nonoxidizing atmosphere on the inside of the tube 2 to prevent nitriding and oxidation of inside of the tube 2. Other grooves 3a, 3b, 3d increase heat radiation area of the surface of the rod 3 and prevent thermal expansion of the rod 3. Thus, rotation of the rod 3 is made smooth and prevent generation of welding defects.
COPYRIGHT: (C)1982,JPO&Japio
JP10500880A 1980-08-01 1980-08-01 Tube end welding device Pending JPS5731490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10500880A JPS5731490A (en) 1980-08-01 1980-08-01 Tube end welding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10500880A JPS5731490A (en) 1980-08-01 1980-08-01 Tube end welding device

Publications (1)

Publication Number Publication Date
JPS5731490A true JPS5731490A (en) 1982-02-19

Family

ID=14396039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10500880A Pending JPS5731490A (en) 1980-08-01 1980-08-01 Tube end welding device

Country Status (1)

Country Link
JP (1) JPS5731490A (en)

Similar Documents

Publication Publication Date Title
JPS5731490A (en) Tube end welding device
JPS5527417A (en) Vertical downward build-up welding method
JPS5223102A (en) Process for manufacturing formed coke
JPS5340187A (en) Fuel assembly of reactor
JPS56114596A (en) Welding method of tube and tube plate in heat exchanger
JPS5425265A (en) Denitration reactor allowing working within during operation
JPS5647291A (en) Welding method of pipe and pipe plate
JPS55112536A (en) Mounting method of thermocouple onto tube wall
JPS55117563A (en) Build-up welding method
JPS5363972A (en) Manufacture of plasma discharge display tube
JPS5573474A (en) Butt welding method of thin-wall tubular bodiy
JPS5566611A (en) Exhaust system for motor cycle
JPS53103953A (en) Inert-gas shielded arc welding method
JPS5384227A (en) Radiant tube combustion burner
JPS5236337A (en) Burner
JPS53103959A (en) Sealing welding method
JPS5616009A (en) Boiler equipment
JPS55109577A (en) Welding method using sealing gas
JPS52143309A (en) Manufacturing method of turbine diaphragm
JPS5691194A (en) Plugging of pipe hole of heat exchanger
JPS5367004A (en) Fixing method for nozzle blade
JPS53142948A (en) Tig welding torch
JPS5372990A (en) In-core monitor with multi-step sealing portion
JPS5510375A (en) Welding method
JPS531793A (en) Nuclear reactor