The invention discloses a one-time
extrusion forming method of a horizontal double-acting combined mold of a double-
flange middle body. Meanwhile, the method discloses a horizontal double-acting
extrusion combined mold for vertical parting, the vertical upper female die and the vertical lower female die form a circumferential die cavity during die closing, the left horizontal
extrusion die and theright horizontal extrusion die form an axial die cavity of the
flange together with the vertical upper female die and the vertical lower female die after the die closing, the left horizontal punchingneedle and the right horizontal
punching needle are arranged in the left horizontal extruding die and the right horizontal extruding die respectively, a
water cooling device is arranged in each penetrating pin, the top head is arranged in the vertical downward concave die, wherein the vertical mold, the horizontal extrusion mold and the perforation tool can move independently. By utilizing the
stroke of the extrusion head and the
punching needle, the
metal can be flexibly controlled to flow reasonably, and the folding defect is avoided, the
metal filling of the
flange part is full, the product can be formed only by one-time heating and one-time extrusion, the process flow is short, the
energy consumption is low, the efficiency is high, and the product size is accurate.