| 摘要 |
<p>A burring apparatus is provided, including a burring die having a top surface for a workpiece to be placed on, the burring die configured to be cylindrically symmetric with a burring hole formed concentrically therein to provide an inner surface, a burring punch having a tip end portion for punching the workpiece to cut off a metal piece and a tip portion for pressing a remaining portion of the workpiece warped in the burring hole to form a boss, and a scrap removing unit attached to the inner surface of the burring die, wherein the burring punch, the burring die and the scrap removing unit are configured to trap, push out and let fall by scraping off the metal piece as the burring punch is lowered into the burring hole and lifted.</p> |
