KOBO Type Forming: forging of metals under complex conditions of the process

Copper workpieces were subjected to forging in open and closed dies by the conventional method and by a complex one utilizing additional reversible rotary motion of the punch. The experimental data obtained in this way became a basis for comparative analysis. It has been found that the complex process of forging enables plastic forming of metal applying small forging force, and the forgings are characterized by homogeneous structure and good geometry while retaining low strength properties. The most effective application of the new method of plastic forming of metals (KOBO Type Forming) presented in this study, has been combined with the production in a single operation of forging preforms with the geometry close to that of a final product.