US 4,819,515 A · Method and apparatus for grinding saw teeth

Abstract

An apparatus for grinding saw teeth of a saw blade measures and grinds the tip of each tooth independently before advancing successively each tooth on the saw blade for grinding. The apparatus includes a pair of grinding wheels movable toward and away from a sawtooth secured in the grinding position. The grinding wheels are under the control of programmable controller which moves the grinding wheels in response to measurements of the side clearances on the tooth made by a tip measurement probe. The method includes measuring the side clearance of a sawtooth in the grinding position with the probe, comparing the measured dimension to a preselected dimension, and moving the grinding wheels to grind the tooth if the measured dimensions exceeds the preselected dimension. Another measurement is taken and the steps are repeated for each tooth until the sawtooth is ground within the preselected dimension. The next tooth is then advanced to the grinding position.

Claims20

Dependent claims

Apparatus for grinding the working portion of a tool to a preselected dimension comprising:

securing means for positioning said working portion in a grinding position;
grinding means for grinding said working portion, said grinding means being mounted for movement toward and away from said grinding position;
measuring means for measuring a dimension of said working portion to be ground by said grinding means, said measuring means being mounted for movement toward and away from said grinding position;
first feed means for feeding said grinding means toward and away from said grinding position;
second feed means for feeding said measuring means toward and away from said grinding position;
and
control means operable to sequentially:
(a) operate said first feed means to feed said grinding means into said grinding position to grind said working portion to a first dimension and then feed said grinding means away from said grinding position;
(b) operate said second feed means to feed said measuring means into said grinding position to measure the first dimension of the working portion and then feed said measuring means away from said grinding position;
(c) compare said first dimension to said preselected dimension;
and
(d) repeat functions (a), (b), and (c) in sequence to grind, measure and compare subsequent ground dimensions of said working portion until the ground dimension substantially equals the preselected dimension.

9 more elements

Dependencies are inferred from the claim text.

Method and apparatus for grinding saw teeth

Life of this patent

Method and apparatus for grinding saw teeth

Life of this patent

Abstract

Claims20