In this electron beam welding video what you are seeing is a weld segment of an alloy-steel cooling channel application split into two separate video feeds as displayed to the weld operator.
1. The first feed (left) shows a dry weld run without the cooling channel cover affixed on the part to display the complicated weld path.
2. The other feed (right) is the same time period within the CNC program, this time with the cooling channel cover on and fully assembled, showing the actual blind EB weld pass.
You will notice occasional features adjacent to the weld such as the hold down bolts that come into very close proximity to the weld pass but remain unaffected due to EBW’s low heat input.
https://www.theresaohm.de/-/connex/
Connex is a relaxing chair made from one continous steel tube with two connectors on both ends. The aesthetic of Connex was inspired by circuit boards, which follow specific rules in the way they are designed such as certain agles (0°,45° and 90°) and parallelity.
The structure of the chair is open at the back and only once someone sits in it the two open ends (hemispheres) connect and close the shape. The user becomes part of the structure of the chair.