The utility model provides an automatic feeding device of a bar digging
machine, which comprises a hanger plate and a bar digging
machine body arranged below the hanger plate, and further comprises a flexible feeding component arranged between the hanger plate and the bar digging
machine body, the flexible feeding
assembly comprises a mounting plate mounted above the bar digging machine body, a set of sliding columns arranged above the mounting plate,
piston cylinders slidably connected to the outer portions of the sliding columns, and a pushing structure arranged below the hanging plate and used for enabling the sliding columns to push the bar digging machine body to conduct flexible feeding. The guide assemblies are arranged on the left side and the right side of the bar digging machine body. By arranging the flexible feeding
assembly, the bar digging machine body can be pushed to feed through the pressure of gas, when the bar digging machine body makes contact with a
sapphire material, due to the fact that the gas has
compressibility, flexible buffering can be formed in the
piston barrel, the bar digging machine body is not subjected to rigid
impact during feeding, and it is avoided that
impact force is generated to damage the
sapphire material; the appearance quality of the
sapphire product is further improved.