Ronald G Cowart

US Patent:

44185898, Dec 6, 1983

Filed:

Feb 26, 1981

Appl. No.:

6/238366

Inventors:

Ronald G. Cowart - Hahira GA

International Classification:

B23D 6312

US Classification:

76112

Abstract:

A method and apparatus for automatically facing saws is described in which a saw blade is held over a spindle by a pair of electromagnets. A pawl engages successive gullets between saw blade teeth in order to index the saw blade. A grinding head mounted on a carrier then moves into engagement with the indexed saw blade until the carrier reaches a limit. Separate hydraulic actuators are used for the pawl and the grinding head carrier so that a sequence of operation can be maintained. The apparatus is adjustable and a counter is provided to automate the sequencing operation. By indexing the saw blade with the pawl, using the electromagnets to hold the saw blade and automatically sequencing the operation, saw blades with irregular tooth patterns and strobe saws having deep-cut rakers extending toward the center of the blade can be automatically faced. A sequence programmer, responsive to a plurality of sensors, controls sequencing of operations of the pawl and grinding head. The sensors provide indications to the programmer of positions or hydraulic pressures associated with the pawl and grinding head.