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The cold drawing process takes places very quickly and during the conversion of mechanical energy into the heat energy the work peace and the tool heat up considerably. In order to achieve a stabile drawing process, it is necessary to keep tracks of the temperature growth of the work piece and the tool. The tool temperature has to be below the established limits, and it is regulated by the amount of the coolant, which is at the same time also a lubricant. The expressions for the temperature growth calculation in the conditions of adiabatic processes that can also be applied to the deep drawing process with the reduction of the wall thickness, due to the high deformation rate, have been presented in the work. The heat balance equation enables the determination of the coolant mass which will maintain the stabile tool temperature, what is confirmed by the experimental researches.

Explosive forming is an unconventional metal forming technology first discovered in the late 19 th century and had large development in the mid-20 th century. Explosives can be used as an energy source with technologies such as deep drawing, welding, expansion, blanking, and piercing, etc. In order to perform the forming process correctly, it is necessary to precisely determine the proper amount of explosives. The paper presents a review of the analytical methods used to calculate the amount of explosives required for forming a hemisphere. Three cases were taken for research with different thicknesses (3,4 and 5 mm) and with a radius of 95 mm. A comparison of the results obtained by these methods was also done.

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