A STUDY ON HEATING PROCESS FOR DEEP DRAWING

Luyen The Thanh; Mac Thi Bich; Than Van The; Banh Tien Long; Nguyen Duc Toan

Luyen The Thanh Hung Yen University of Technology and Education
Mac Thi Bich Hung Yen University of Technology and Education
Than Van The Hung Yen University of Technology and Education
Banh Tien Long Hung Yen University of Technology and Education; Hanoi University of Science and Technology
Nguyen Duc Toan Hung Yen University of Technology and Education; Hanoi University of Science and Technology

Keywords: One – end resistance heating rods, deep drawing mold, high strength and difficult – to – cut materials;, heating time., heating system

Abstract

Thermal – assisted machining is an effective solution to improve productivity and product quality which are made from high strength and difficult – to – cut materials. This method is widely used in non-chip machining (forging, stamping, drawing, etc.) that overcomes disadvantages of traditional machining methods. Some studies of hot stamping are conducted by direct heating on the blank or on the mold. The suitable heating method is chosen based on material properties and requirements of the products. However, the heating on the mold method is possible to control local heat or uniform heat on the work-piece while the calculation of heat capacity, heat transfer as well as the heating time to achieve the temperature on the work-piece are necessary to design a suitable mold and heating system. This study describes, generalizes some heating methods and builds a heating system that uses one – end resistance heating rods to heat the deep drawing mold. Besides, effect of heating time on the temperature on the work-pieces and changing the temperature on the work-piece according to various heat levels through the heating control system are researched. Thereby, forming ability is improved and mistakes in machining process are reduced.

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