Patent ID: 8656590

Claim:
A method for manufacturing a heat dissipation apparatus, the method comprising: providing a fin assembly comprising a plurality of fins stacked together and spaced from each other, each of the fins defining a through hole therein, a collar extending outwardly from each fin at an edge of the through hole; providing a heat pipe with an outer diameter less than that of the through hole, and inserting the heat pipe in the through hole of each fin; providing a first punching tool and a second punching tool, the first punching tool being identical to the second punching tool, each of the first punching tool and the second punching tool comprising a handle portion and a plurality of punching units, the punching units of the first punching tool and the second punching tool respectively extending from the handle portions of the first punching tool and the second punching tool, each of the punching units defining a recess in a free end thereof, each recess having an arc-shaped edge, the first punching tool and the second punching tool spaced from each other, and the recess of each punching unit of the first punching tool facing the recess of a corresponding punching unit of the second punching tool; placing the fin assembly between the first punching tool and the second punching tool, the collar of each fin located between the recess of a corresponding punching unit of the first punching tool and the recess of a corresponding punching unit of the second punching tool; and the punching units of the first punching tool and the corresponding punching units of the second punching tool punching corresponding collars of the fin assembly from two opposite sides, the collars shrinking inwardly and pressing the heat pipe to deform until the heat pipe is fittedly mounted in the collars of the fin assembly.