The blank sheet preparation phase which prepares the blank sheet making use of the heat treatment hardening steel sheet which possesses the various

摘要

The present invention relates to a kind of auto parts machinery manufacture method for manufacturing with varying strength, relate more specifically in a kind of manufacture automobile using heat treatment hardened steel with different local thickness. The present invention provides a kind of for auto parts machinery manufacture method, comprising: prepares plain pape a blank sheet preparation process, has different-thickness using heat treatment hardened steel plate, heat treatment hardened steel plate has different materials, according to needed for intensity; It is conjugated forming step for one blank of forming blank combination, laser welding is used by connection plain pape; A kind of conjugate being cold-pressed molding process cold moudling blank; After operating heating cold mould part to the temperature of AC3 or more with heat-treatment quenching,It parses mold and keeps stress, worked as by quenching part and constrain in metal die, the method for improving intensity.