Preloading the Pressure-Bar Assembly for Improved Veneer-Lathe Setting Accuracy

Wear in the pressure-bar assembly of a veneer lathe will frequently cause the horizontal opening, under operating conditions, to deviate from even the most accurate adjustment made under static conditions. Simulating the forces of lathe operation by a preloading device, while making static horizontal opening adjustments, can minimize or eliminate this problem. A simple hydraulic-jacking unit consisting of two miniature jacks connected by flexible hose to a portable hand pump is described. The jacks, mounted on brackets, are attached to each end of the pressure-bar assembly and preload it by exerting pressure against the lathe chucks.

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