Non-cutting hex head bolt cold heading process appreciation
Non-cutting hex head bolt cold heading process appreciation - specification example M8*30
Applicable equipment: four station cold heading machine
Blank: blank diameter d0≈1.18d (d=rod diameter)
Process: First station: full-length reduction of the rod;
Second station: hex head preview;
Third station: the second pre-twisting of the hexagonal head and the formation of the rod end chamfer
Fourth station: Finish the final rivet with the washer face hex head and carry out the second reduction of the shank to the diameter of the slab required for the filature.Features: The process is a two-reduction process without trimming, and the hex head has no pockets.
Related information recommended:
Appreciation of the cold heading process of hexagonal bolts
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