Chip removal machining
Machining polymer matrix composites
Article REF: BM7425 V1
Chip removal machining
Machining polymer matrix composites

Author : Alain DESSARTHE

Publication date: April 10, 1999 | Lire en français

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2. Chip removal machining

The term "chip removal" is inappropriate in the case of composites, where machining produces powder rather than chips.

2.1 Shearing and punching

Shearing and punching, or die-cutting, are applicable to thin-gauge composite materials (up to 2.5 mm). The cutting tool must be particularly sharp. Use a vertically-descending guillotine-type shear with a hardened steel upper blade having a cutting gradient of around 0.7% in relation to the lower blade, with clearance set to a minimum. Erta (Tufnol brand) recommends a tool slope of 2% for shearing plate up to 2.5 mm.

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