A number of my projects have featured sheet metal casings, with a number of louvres (photo 1) to allow air movement. Our editor had noticed these and suggested that I write a short note on this item of tooling, namely the:- the louvre cutting and pressing punch. The action is a combination of shearing and forming, between top and bottom tools, as illustrated in Fig 1. Hence a press is required capable of delivering a fair amount of force as well as accurately holding the tools in correct relative positions.
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