Induction hardening apparatus for a crankshaft
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United States of America Patent
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Dec 12, 2000
Issued Date -
N/A
app pub date -
Jan 24, 2000
filing date -
Oct 29, 1997
priority date (Note) -
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Abstract
An induction hardening apparatus for inductively heating and quench hardening a crankshaft includes an arrangement of two workstations similarly configured and a robotic device indexing the crankshaft from a first workstation to a second workstation. The induction hardening apparatus is designed with a single induction coil located at the first workstation for the sequential induction heating and quench hardening of the pins of the crankshaft. At the second workstation, a single induction coil is used for the bearing surfaces of the crankshaft. An important feature of the present invention is that the induction coils do not contact the surfaces of the crankshaft which are being inductively heated and quench hardened. Crankshaft dimensions and geometry are programmed into servodrive systems which move the corresponding coil in X and Y directions accurately tracing the orbit or path of each pin and each bearing surface. Each induction coil is configured with openings on an inside surface in order to deliver a quench fluid directly to the inductively heated portion of the crankshaft.
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