Ogawa's movies on welding and underwater cutting

You can watch movies on welding in this site. Please click on pictures or underlined sentence.

Recent ultra high speed movies and oldies

Detail explanation for my presentation "Consideration of Gas Tungsten Arc Behavior during Ignition Stage" at TWR2006 opens.

1) High speed movies(525kfps) at arc ignition stage. Video viewrate is 30fps, so time span enlarges about 14,000times.
2,3) Helium and Argon arc at 100kfps cleaning action of cathode surface at arc igniton stage.
4) Arc in air at 54kfps. Hot metal is very active for oxygen. Oxcidation reaction plays agressive.
5) Laser and hot wire hybrid welding at 200fps.
Typical high-speed movies
1)525kfps 2)He 100kfps 3)Ar 100kfps 4)Air 54kfps 5)200fps
(1)525kfps (2)100kfps (3)100kfps (4)54kfps (5)200fps
Typical unusual old high-speed movies
1)rotation 2)short 3)spray 4)spray 5)spray
(1)rotation (2)short (3)spray (4)spray (5)short
Some movies are now open. Please click this sentence or click "5. movie list" in left column of Page lists.

2012.02.12open,@2026.01.12revised

Page list
1. Top (in Japanese)
2. Outline of Labo (in Japanese)
3. How to use High Speed Camera (in Japanese)
4. Visual aids training machine
5. movie list(in Japanese)
6. GTA welding in N2 7. SEM pictures
Ogawa Giken

President: Yoji Ogawa
He worked in AIST since 1974 to 2012.
Main research fields are underwater welding and cutting. These techniques requires autonomous mechanization.
So, research works on image processing and high-speed imageing technology are another major targets.