Designing and building Fine blanking tooling presents unique challenges. To maintain tolerances of .0004 inches in size and .0002 inches in position requires the utmost in planning and execution. As a result, most components are produced using wire EDM machines. In many cases conventional (sinker) EDM is used to produce punch elements.
Unlike conventional metal stamping dies, Fine blank tooling must withstand heavy tensile stress as well as the normal compressive stress. This forces the die builder to use the best tool steel material available. Depending on the die element CPM 10V, M4, M2, or D2 tool steels are utilized.
Tool manufacturing
As shown above, a completed fineblanking tool is very robust. Note the four-bushing die set needed to maintain tool alignment.
Also note the air blast lines shown on the lower left. These lines eject the parts and slugs from the tool, where they are then separated by a vibrating screen. |
Tool Manufacturing
