The image shows a cylindrical workpiece with forces being applied symmetrically from all directions. Based on the visual representation, we analyze the given options:
\subsection*{Option Analysis}
- (A) Rolling:
Rolling involves passing the workpiece between rolls to reduce thickness or change shape. It is typically directional and not symmetrical from all sides. This does not match the image.
- (B) Forging:
Forging applies compressive force using dies, usually from top and bottom. While forging may involve high pressure, it typically doesn't show forces acting from multiple sides simultaneously as seen in the image.
- (C) Extrusion:
In extrusion, the material is forced through a die opening. The direction of force is unidirectional (from one end), which contradicts the symmetrical force application shown.
- (D) Swaging:
Swaging is a process where the cross-sectional area of a workpiece (typically a rod or tube) is reduced by applying compressive forces radially from multiple sides. This matches the image perfectly, as forces are shown acting symmetrically around the central cylinder.
\subsection*{Conclusion}
The process depicted in the image is best identified as: (D)
This corresponds to Swaging, due to the characteristic symmetrical compression from all sides.