PURPOSE: To obtain accuracy of inner face of a hole as accurate as machining simultaneously with deburring by making press work using a specified punch having a burnished part.

CONSTITUTION: Rake angle α in minus direction is provided in the blanking part at the tip of a punch 1. A burnishing part 3 larger in diameter than the blanking part 2 by allowance for burnishing is provided at the base end side of the blanking part 2. The blanking part 2 and burnishing part 3 are connected through a slanted tapered face. When a burred hole of a hot forged product is blanked using the punch 1, the burr and draft angle part are blanked by the blanking part 2, and at the same time, the inner face of the blanked hole is burnished by the burnishing part of the punch 1.