Patent ID: 8051562

Claim:
A method for manufacturing a fuel pump, which includes a tubular, metal housing that has an opening; an impeller that is received in the housing; and a cover that covers the opening of the housing and is placed on one axial side of the impeller where the opening of the tubular housing is located, the method comprising: inserting the cover, which is made of aluminum, into the housing, which is made of iron-based metal, to place the cover radially inward of the housing; after the inserting of the cover into the housing, heating a housing-side engaging portion of the housing, which is located at a peripheral edge of the opening of the housing, with at least one electromagnetic induction heater, each of which is placed radially outward of the housing and has an electromagnetic coil; and swaging the heated housing-side engaging portion toward the cover by applying a mechanical force against the housing-side engaging portion to fix the cover to the housing, wherein the heating of the housing-side engaging portion includes heating both (a) a bending portion of the housing, which is bent in the swaging of the housing-side engaging portion, and (b) a radially opposing portion of the housing, which is located adjacent to the bending portion and is radially opposed to the cover, as the housing-side engaging portion, and the swaging of the housing-side engaging portion includes: axially moving a punch to press the punch against the heated housing-side engaging portion to thereby bend a portion of the housing-side engaging portion; stopping the pressing of the punch against the heated housing-side engaging portion; and cooling the heated housing-side engaging portion to induce heat shrink of the housing-side engaging portion, said heat shrink axially urging and securely engaging the housing-side engaging portion against the cover.