Automatic feeding and blanking device

The utility model discloses an automatic feeding and blanking device which comprises a blanking mechanism, a conveying mechanism and a feeding and taking mechanism, the conveying mechanism comprises a conveying rack and a conveying belt, and a plurality of sets of scraping positioning assemblies are distributed on the conveying belt at intervals; the blanking mechanism comprises a blanking bin, a blanking channel is arranged in the blanking bin, a bottom supporting plate used for supporting workpieces is arranged at the bottom end of the blanking channel, and a notch allowing the scraping positioning assembly to pass through is formed in the middle section of the bottom of the blanking channel. The feeding and taking mechanism comprises a base, a supporting plate is arranged on the base in a sliding mode, a lifting driving mechanism drives the supporting plate to vertically ascend and descend, a translation driving mechanism is arranged on the supporting plate, and the translation driving mechanism drives a s