Roll-hardening machine for crankshafts

Details Roll-hardening machine for crankshafts Roll-hardening machine for crankshafts

1998-05-20

1999-08-31

Hail, III, Joseph J.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72107, 29 601, B21D 302

Patent

active

059438932

ABSTRACT:
A machine for hard-rolling a workpiece such as a crankshaft includes a drive apparatus (7) for rotating the crankshaft (8, 113), suspension apparatuses (9 to 17), hard-rolling devices (18 to 26, 111) movably supported by the suspension apparatuses, and a crankshaft transport apparatus (100). Each hard rolling device is a scissors jaw including two scissors arms (46, 47, 114, 115), with respective hardening roller heads (66 to 69, 118) and respective opposite counter-support heads (74, 119) mounted on the upper ends of the scissors arms facing the crankshaft. Each suspension apparatus (9 to 17) is slidably adjustable along the rotation axis (27) of the drive apparatus (7). A drive arrangement (49, 122) is connected to the lower ends of the scissors arms directed away from the crankshaft, for closing and opening the scissors arms to a maximum opening width (59, 130) that is larger than twice the maximum structural radius (60, 131) of the crankshaft. A respective angled bellcrank lever (78) is pivotally supported on each suspension apparatus, with one shank thereof pivotally connected to one scissors arm and the other shank thereof connected to a piston cylinder unit (84), which in turn is connected to the suspension apparatus (9 to 17). Guide members (88, 89) are provided for guiding the upper ends of the scissors arms.

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