jamil

Why is friction a factor in determining the ram force in direct extrusion but not a factor in indirect extrusion?

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amidii

Friction is a factor in direct extrusion because the work billet is squeezed against the walls of the container so that friction resists the movement of the billet toward the die opening. In indirect extrusion, the billet does not move relative to the container walls, and thus there is no friction.

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ananya

Throughout strong expulsion rubbing resists the movement with the office while inwards roundabout expulsion there is no clash

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