Method and apparatus for shrink fitting metal liner sleeves into

Details Method and apparatus for shrink fitting metal liner sleeves into Method and apparatus for shrink fitting metal liner sleeves into

1988-09-16

1989-07-18

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1057, 219 95, 266129, H05B 500

Patent

active

048495948

ABSTRACT:
A method and apparatus for installing steel liner sleeves in the cylinder bores of an aluminum engine block comprises axially sliding the liner sleeves onto slide portions of respective mandrels, over an inductor coil on the free outer end of each mandrel. After axially moving the mandrels to insert their inductor coils into the cylinder bores and then energizing the coils to inductively heat the walls of the cylinder bores to a predetermined elevated temperature to expand the bores to a diameter sufficient to axially receive the liner sleeves therein with a snug sliding fit, the coils are de-energized and the liner sleeves then immediately axially slid along the mandrels to a position over the de-energized coils and within the annular coupling gap space between the coils and the bore walls, and into their axially inserted position within the heated cylinder bores, in which position they are maintained until the cylinder bore walls cool and contract to form a tight shrink fit around the liner sleeves.

REFERENCES:
patent: 2975259 (1961-03-01), Osborn, Jr.
patent: 3699297 (1972-10-01), Grin et al.
patent: 4336432 (1982-06-01), Bajorek
patent: 4574172 (1986-03-01), Burack et al.
patent: 4584453 (1986-04-01), Fu
patent: 4659892 (1987-04-01), Hammond et al.
patent: 4745251 (1988-05-01), Vickers

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