Through theoretical research,design calculation,comparison analysis and test analysis,a set of forming mold for the production of multi-curved sheet metal parts with large depth is designed and manufactured.A double-layer lifting mechanism driven by nitrogen spring is designed to solve the problems of difficult arrangement of the pressing mechanism,serious plate deviation and unreliable pressing during the forming process.Through the design calculation and test verification,the springback is precisely controlled,so that the size and contour accuracy of the formed parts can meet the requirements of the drawings.At present,the mold has been successfully applied to the mass production of the excavator oil tank,and has achieved good application results,greatly improving the dimensional accuracy and forming quality of the excavator oil tank.
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