A blade sharpening system for log saw machines is provided. An example multiphase grinding wheel has a grinding face with one or more abrasive concentric rings for sharpening the cutting blade of the log saw machine, and one or more padded concentric rings consisting of fiber padding. Sharpening with the multiphase grinding wheel improves cut quality, increases blade life, removes glues and varnishes from the cutting blade, reduces blade deformation, and hones the edge of the cutting blade. A pneumatic tensioning system uses air bladders to apply a dynamically cushioned pressure between the grinding wheels and the cutting blade. The fiber-padded grinding wheels and the air bladder tensioner provide improved sharpness of the cutting blade and longer life for the mechanical components. The padded grinding wheels decrease fire risk, and the tensioner can be operated remotely, decreasing human injuries common with conventional setup actions near the sharp cutting blade.

A blade sharpening system for log saw machines is provided. An example multiphase grinding wheel has a grinding face with one or more abrasive concentric rings for sharpening the cutting blade of the log saw machine, and one or more padded concentric rings consisting of fiber padding. Sharpening with the multiphase grinding wheel improves cut quality, increases blade life, removes glues and varnishes from the cutting blade, reduces blade deformation, and hones the edge of the cutting blade. A pneumatic tensioning system uses air bladders to apply a dynamically cushioned pressure between the grinding wheels and the cutting blade. The fiber-padded grinding wheels and the air bladder tensioner provide improved sharpness of the cutting blade and longer life for the mechanical components. The padded grinding wheels decrease fire risk, and the tensioner can be operated remotely, decreasing human injuries common with conventional setup actions near the sharp cutting blade.

The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided to move the grinding wheel towards the disc-shaped cutting blade.

The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided to move the grinding wheel towards the disc-shaped cutting blade.

The grinding unit includes at least one grinding wheel adapted to rotate around a respective rotation axis, and a thrust actuator adapted to push the grinding wheel against a cutting edge of a disc-shaped cutting blade. A load cell is also provided for detecting an axial thrust exerted on the grinding wheel.

A method of manufacturing an agricultural tillage disk blade includes providing a substantially circular-shaped disk body with an outer peripheral edge and a central opening that defines a rotation axis, the outer body being disposed within a first plane. A plurality of waves is formed in a predetermined pattern in the outer peripheral edge of the disk body, and the outer peripheral edge is sharpened to form a plurality of teeth such that at least a portion of the sharpened outer peripheral edge is disposed within a second plane that is parallel to the first plane and substantially perpendicular to the rotation axis. The method also includes machining a plurality of relief portions in each of the plurality of waves at a location radially inward of the plurality of teeth, and heat treating the disk body after the sharpening and machining steps.

A dressing method of a cutting blade includes a first cutting step of causing the cutting blade to cut into a dressing board held by a holding surface of a chuck table with a cutting depth that does not surpass the length of the region of roundness in the radial direction of the cutting blade to form a cut groove in the dressing board, and a second cutting step of causing the cutting blade to further cut into the groove bottom of the cut groove formed in the first cutting step with a cutting depth that does not surpass the length of the region of roundness in the radial direction of the cutting blade to carry out cutting on the groove bottom with tracing of the cut groove.

A dressing method of a cutting blade includes a first cutting step of causing the cutting blade to cut into a dressing board held by a holding surface of a chuck table with a cutting depth that does not surpass the length of the region of roundness in the radial direction of the cutting blade to form a cut groove in the dressing board, and a second cutting step of causing the cutting blade to further cut into the groove bottom of the cut groove formed in the first cutting step with a cutting depth that does not surpass the length of the region of roundness in the radial direction of the cutting blade to carry out cutting on the groove bottom with tracing of the cut groove.

An apparatus for positioning a feed finger of a saw sharpening machine with a saw blade mounted in the saw sharpening machine includes a tooth detection unit which is used to detect the position of a tooth of the saw blade relative to the feed finger. The tooth detection unit comprises an object detection sensor that is mounted to the feed finger facing the tooth and is used to determine the position of the tooth and an adjacent gullet. Once the position of the tooth and gullet is determined, the feed finger is moved into the gullet and the feed finger is actuated to advance the saw blade into a position for a tooth grinding operation.

An apparatus for positioning a feed finger of a saw sharpening machine with a saw blade mounted in the saw sharpening machine includes a tooth detection unit which is used to detect the position of a tooth of the saw blade relative to the feed finger. The tooth detection unit comprises an object detection sensor that is mounted to the feed finger facing the tooth and is used to determine the position of the tooth and an adjacent gullet. Once the position of the tooth and gullet is determined, the feed finger is moved into the gullet and the feed finger is actuated to advance the saw blade into a position for a tooth grinding operation.