| Bending & Straightening Press | |
| What Is Friction Welding? | |
| This is a special purpose hydraulically operated press for carrying out one of the most important operations of Valve manufacturing i. e. Valve straightening. Apart from valve straightening, it is an important non-destructive testing for validation of friction welding process. The press has a number of rollers placed at pre-determined positions. The valve is rotated between these rollers & all its lateral movements are restricted. |  |
| It is then deliberately
& forcibly bent to a certain angle while in rotating motion. The
above process is designed to confirm the adequacy of friction welding
strength alongwith straightening of the Valve forging which is further
to be machined. If the straightening operation is not correct, then
the rest of the machining operations are difficult to carry out within
specified tolerances. |
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