METHOD FOR MAKING A TOOL AND TOOLS MADE THEREFOR

摘要

A method (2) of manufacturing a tool comprising the steps of preparing a cylindrical blank (5), the blank (5) being divided into sections (51, 52); changing an outer diameter (d1) of one of the sections (51) and shaping the sections (51, 52) to complete a tool (4); during the shaping (c) the portion (51) whose outer diameter (d1) is changed is shaped into a symmetrical polygon (p1) to be used as a head portion (41) of the tool (4) and for shaping another Section (52) to obtain a polygon (p2) with alternating concavities and convexities thereon, which can be used as an engagement piece (43) of the tool (4). Accordingly, the progressive implementation of the method (2) prevents the blank (5), which consists of a hard steel material, from deteriorating, in order to maintain the good mechanical properties of the tool (4), to increase the efficiency in production and to increase the production costs reduce.