After the hemisphere was tested ultrasonically to ensure that there are no buried cracks, the hemisphere was sent for machining. Machining was done to removes the gas saturated layer and to maintain the desired wall thickness. Normally machining of hemisphere is done on a CNC lathe. We did not posses a CNC machine. But we had a brilliant engineer. He came forward and took the challenge of machining using the copying attachment to the ordinary lathe we had in the work shop.As the machining parameters such as speed,feed etc.are similar for machining stainless steel and Ti-6Al-4V he first experimented with a stainless steel hemisphere of the same diameter as the titaniun alloy hemisphere. In two or three trials he achieved the dimensions and shape. Then he took up the task of machining titanium sphere with the knowledge he had gained from copy turning stainless steel hemisphere.He could achieve the required shape as well as the required uniformity in thickness.We crossed one more hurdle. We were now ready for welding.
After the production process of machining was stabilized we invested in a custom built CNC machining center.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment