| 摘要 |
A main beam fabrication procedure and system for making main beams for warehouse framework through feeding, auto-forwarding and flattening, punching, roller shape-forming, cutting-off and finished product collection steps, in which the punching machine comprises an upper mold holder, four upper punching dies arranged in two longitudinal rows on the bottom side of the upper mold holder and adjustable to change the transverse pitch between the two longitudinal rows of upper punching dies, a bottom mold holder, and four bottom punching dies arranged in two longitudinal rows on the top side of the bottom mold holder and adjustable to change the transverse pitch between the two longitudinal rows of bottom punching dies.
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