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Punching involves shearing out a shaped piece from a thin material (such as sheet metal) by means of a press with a special tool. The tool consists of a top part (punch) and a bottom part (die). The process is monitored by incorporating force or strain sensors in the tool, as close possible to the shearing operation. Force sensors can be positioned as follows:
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 Overview:
Diagram of a punching press with multistage tool
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 A: Mounting of cartridges containing SlimLine or structure-borne noise sensors in the top part of the press. |
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 D: Incorporation of Type 9243B longitudinal measuring pins in the die or punch.
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