Anti-collision protective sleeve for pipe target pipe orifice and forming die of anti-collision protective sleeve

A forming convex column and an annular groove are manufactured in the middle of the upper end face of a bottom die base, an annular boss matched with the annular groove is manufactured on the bottom face of a middle die base, and a middle boss, a forming convex ring and a positioning guide ring are sequentially manufactured on the bottom face of an upper die base from middle to outside. The positioning guide ring is matched in a positioning guide groove in the upper end face of the middle die base, the middle boss and the forming convex ring are located in an inner hole of the middle die base, and the upper end face of the forming convex ring makes contact with the bottom face of the middle boss. The outer ring wall of the middle boss and the inner ring wall of the forming convex ring, the outer ring wall of the forming convex ring and the inner hole wall of the middle die base, and the corresponding positions of the middle boss, the lower end face of the forming convex ring and the upper end face of the bott