Apparatus for heat-treating a V-type cylinder block by induction heating

A heat-treatment apparatus for quenching a V-type cylinder block (W) by induction heating, comprising:

• a work table (11) on which said cylinder block (W) is fixedly mounted in a reference position thereon, wherein said work table (11) is fixedly mounted on a base frame (10);
• a plurality of induction heating coils (23) each for heating an inner surface of each of a plurality of cylinder bores (wn) of said cylinder block (W);
• and
• a transfer table assembly (13, 18, 21) for supporting said heating coils (23) in a manner such that each of said heating coils (23) is movable in a reciprocating manner in parallel with a longitudinal axis of each of said cylinder bores (Wn) to enter and exit from each of said cylinder bores (Wn) and also movable in a direction in parallel with each of rows of said cylinder bores (Wn) in a reciprocating manner;
• wherein said transfer table assembly (13, 18, 21) is movably mounted on each of opposite sides of said base frame (10) to sandwich said work table (11) therebetween.