| 摘要 |
<p>A reinforced upper frame (100) for supporting a cabin of heavy construction equipment using a welding deformation preventing structure (130) and a method of manufacturing the same are disclosed, in which even if a side frame (160) is welded to a machined center frame (140), there is no thermal deformation around the machined portion. The reinforced upper frame (100) includes a center frame (140) having a lower plate (110) machined to accommodate a swing ring gear, a lateral plate (120) machined to accommodate an operation device, and a welding deformation preventing structure (130) fixed to one side of the lower plate and lateral plate prior to welding, in which a part of the cabin is mounted on the welding deformation preventing structure, and left and right frames (170;180) each having a side channel disposed in a longitudinal direction of the center frame (140) and a side frame (160) welded to the structure for connecting the side channel and the center frame.
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