The utility model relates to a die making base hydraulic
locking mechanism which comprises a first locking oil cylinder, a bottom plate, a first wedge-shaped block and a second wedge-shaped block opposite to the first wedge-shaped block, the bottom plate is detachably installed on a
machine body of a cold header, a locking groove is formed in the bottom plate, and the second wedge-shaped block is detachably installed at the bottom of a die making base; and the first wedge-shaped block and the second wedge-shaped block are accommodated in the locking groove. According to the designed hydraulic
locking mechanism for the
punching base, the first wedge-shaped block and the second wedge-shaped block installed at the bottom of the
punching base are driven by the first locking oil cylinder to achieve wedge-caulking in the bottom plate locking groove, precise control and matching are achieved in combination with the base plate installation part, the limiting protrusion, the clamping groove and other structures, and the two ends of the
punching base can be selectively locked; therefore, the locking reliability, the positioning precision and the overall rigidity of the die making base are improved, the stability of cold heading
machining is guaranteed, and rapid die replacement is facilitated.