Combination top and side grinding machine for circular saw blades

DETAILED DESCRIPTION The present invention does away with need of having separate machinery for grinding the top and side portions of the teeth of a circular saw blade.
According to the invention, a combination saw regrinder is provided which includes a side grinder and a top grinder.
The side grinder includes a pair of rotary side grinding wheels for sharpening a first tooth of a circular saw blade and a top grinding wheel for sharpening a second tooth of the circular saw blade.
The combination saw regrinder includes a synchronized actuator for causing the rotary side grinding wheels and the top grinding wheel to engage the first and second teeth, respectively, substantially simultaneously.
Two separate assemblies, a side grinding assembly and a top grinding assembly are located at opposite radial ends of the saw blade.
A motorized cam actuates a reciprocating drive means for moving the side grinding wheels into and out of engagement with the first saw blade tooth.
At the same time, the cam actuates a piston which moves the top grinding wheel into and out of engagement with the second saw blade tooth.
Valves for air cylinders are also driven by the motorized cam for clamping the saw blade in place to prevent side-to-side movement during the sharpening operation.
A mechanical linkage connected to the side clamping air cylinder is coupled to a rotary shaft for mounting the saw blade.
When the side clamp releases, the mechanical linkage advances the saw blade rotationally to position the next tooth, one at each radial end of the saw, for sharpening.
All air cylinders and mechanical linkages for performing these operations are driven by a single motor driven cam actuator.
This eliminates timing problems and enables all of the sequencing for the various positioning and sharpening operations to be controlled by a single motorized actuator.
It is a principal object of this invention to provide a combination dual side grinder and top grinder for the teeth of a circular saw blade in order to provide two distinct sharpening operations for the same blade