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The article determinates the operating temperature of forging tools intended for the hot precision forging process of a selected series of die forgings, with respect to the operational durability of the forging equipment. The durability of forging tools is one of the important aspects affecting the price of the final product in the form of a forging, especially in the case of a small forging, up to 45 %. The optimal operating temperature of forging tools is usually selected for a given technology, but also based on the heat balance resulting from the heat generated because of plastic deformation and friction of the forging as well as the heat released by the tools during their cooling and lubrication. Only a proper selection and maintenance of temperature ensures high durability. As part of the research work, a permanent system for measuring and recording the temperature of forging tools in a die forging process on a hammer, with ongoing temperature registration for the whole set of tools, was presented. Various methods of heating and reheating forging tools dedicated to hot drop forging processes were presented and analyzed, including heating using natural gas as a medium and induction heating using a developed system based on two 2 x 10kW inductors. The obtained results indicate that the appropriate control of the tools temperature and their induction heating/reheating gives the best results in terms of minimizing the energy consumption necessary to ensure the stability of the tool operating temperature conditions.
Keywords: Precision forging on hammer, forging dies, heating of tools, induction heating system© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.