03.11.2010
Computer process planning of induction hardening
Phases in setting up the induction hardening procedure have been discussed. For the exact definition of working parameters, computer simulation is recommended. For the axially symmetric work-pieces a special simulation program has been developed. Performance of the simulation program has been tested for the case of induction hardening of steel cylindrical work-piece. The measured values of surface hardness and hardening depths have been compared with the specified values, indicating good corespondence between the simulated and obtained values.
Introduction
Thin surface layer (0,25 to 2,5 mm) on certain location of a workpiece made of steel or cast iron is hardened by the induction hardening process. The hardened layer is characterized by improved wear resistance and contact resistance, while in the same time, properties of core are not changed. Formation of the hardened layer must not cause significant changes in shape and dimensions of the workpiece [1, 2]. Quality conduct of the induction hardening procedure should result in required pattern of hardened layer, specified surface hardness and hardening depth. All required properties of the hardened layer will be achieved only if the specific details of the process have been taken into the consideration even in the design stage of the workpiece and correct conduct of process has been provided. Process planning includes also design and fabrication of the induction coil of the best-suited shape and dimensions, and selection of exact process parameters. This calls for the mathematical modeling and computer simulation of physical phenomena in the workpiece.
Applying commercially available software and proprietary developed program packages preparation of the induction hardening process may be set up with acceptable accuracy, requiring only a very small trial batch (usually containing only several pieces).
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