TY - JOUR AU - AB - https://doi.org/10.26552/com.C.2016.3.71-77 Jan Moravec* CUTTING METAL SHEET WITH A PUNCH CUTTING METAL SHEET WITH A PUNCH WITH INTERNAL HEATING WITH INTERNAL HEATING This paper describes issues related to the process of cutting with a punch with internal heating. The theoretical part explains the effects related to thermal expansion, conduction and transfer of heat in the body of punches. The experimental part refers to the design of a tool with an internally heated punch. Experimental results are summarised and the process is analysed in the discussion. Keywords: Metal sheet, internal heating, cutting, cutting tool, forming. 1. Introduction performing calculations, we can understand surface expansion as linear expansion in two directions/dimensions (Fig. 1) [7]. Forming technologies have long used various ways and methods based primarily on physical knowledge. For a longer time, the method has been used of deep drawing using heating the active parts of drawing tools. The first person to describe this method was Romanovskij in 1968 (p. 191, and he published the process picture No. 114 B) [1]. In 1965, Srp, et al. published this solution (p. 132, Figure 199) [2]. This method is also presented by Cabelka, et al. in 1967 (pp. 261-262, Figure 3.509) [3], Blascik, et TI - Cutting Metal Sheet with a Punch with Internal Heating JF - Communications - Scientific letters of the University of Zilina DO - 10.26552/com.c.2016.3.71-77 DA - 2016-09-30 UR - https://www.deepdyve.com/lp/unpaywall/cutting-metal-sheet-with-a-punch-with-internal-heating-ykFdQFBcNr DP - DeepDyve ER -