Many consider press brake tooling a minor accessory in metal forming when in fact the opposite is true. In the first part of this two-part series, we discussed the minimum requirements for tooling and clamping, as well as some details of punch selection. This month we continue that discussion For L shapes the rules are … there are no rules. Almost any punch shape will work. So when selecting punches for a group of parts, you always should consider these L-shaped parts last, considering just about any punch shape can handle them. When forming these L shapes, use a punch that also can form other parts, rather than adding unnecessary tools to the library. Remember, when specifying tooling, less is always best—not just to minimize tooling cost, but also to reduce setup time by reducing the number of tool shapes needed on the shop floor (see Figure 1). Other shapes do require specific rules for punch selection. For instance, when forming J shapes, the rules are (see Figure 2): As you can see, the punch selection rules deal mostly with workpiece interference, and this is where bending simulation software can play an important role. If you don’t have access to bend simulation software...