CONTROLLING METHOD FOR FORGING SEMI-SOLIDIFIED METAL FORGING BODY AND FORGING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a forging formation from a semi-solidified metal forming body with which this forging formation is separated into a velocity control process for compress-forming the semi-solidified metal body and a pressurizing force control process, and a process for continuously changing over from the velocity control process to the pressurizing force control process, is provided and the quality of a product is improved so that the pressurization in the forging formation is continued.;SOLUTION: The semi-solidified metal forming body is forge-formed in a forming cavity formed in a forming cavity formed with an upper die and a lower die. This forging formation is composed of the velocity control process Av for compress-forming the semi-solidified metal forming body laid on the forming cavity of the lower die with the descent of the upper die and the pressurizing force control process Ap for applying a last forming pressure Pmax to the semi-solidified metal forming body compress-formed in the cavity by ascending the lower die when the upper die descends a first stroke distance. When this forging is shifted from the velocity control process to the pressurizing force control process, the change-over process Ac for generating larger pressure than the pressure developed at the last step in the velocity control process, is arranged.;COPYRIGHT: (C)2005,JPO&NCIPI