Dummy Heat Source Technique for Estimating the Machining Error Caused by Thermal Behavior in Fine Boring
Abstract
During the process of fine boring of engine cylinder blocks in the automotive industry, a machining error occurs mainly due to mechanical issues and the cylinder’s thermal behaviour. This paper introduces a new experimental method to investigate the influence of thermal behavior on machining errors independent of mechanical factors. The temperature distribution in a cylinder during the actual boring process was successfully simulated by heating the cylinder using a YAG Laser. Then, based on the temperature distributions, an FEM model was developed to predict the thermal deformation of the cylinder’s diameter during machining. The results showed that the effect of the thermal behavior on machining errors can be investigated. As well, in order to establish parameters of the method, the YAG Laser absorption rate for cast iron (FC250) and the quantity of heat flow into a cylinder during the actual fine boring process were investigated.
Keywords
Fine boring Machining error FEM YAG LaserPreview
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References
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