Sawbenching assembly and method

A sawbenching assembly for reworking a sawblade supported by an anvil to flatten the sawblade, the sawbenching assembly comprising:

• an articulated tool arm comprising:
• a tool arm support;
• a scissors linkage arm assembly comprising first and second pivot joints connected by parallel arms at first and second ends of the parallel arms;
• the first and second pivot joints defining first and second generally vertical pivot axes;
• the first pivot joint mounted to the tool arm support;
• the parallel arms rotatable about the first pivot axis;
• the second ends of the parallel arms movable in a generally vertical direction while maintaining a generally vertical orientation of the second pivot axis;
• a forearm having an outer end and an inner end mounted to the second pivot joint for generally vertical movement with the second pivot joint and rotation about the second pivot axis;
• and
• a user-operated actuation device connected to the articulated tool arm;
• and
• a hammer assembly mounted to and supported by the articulated tool arm at the outer end of the forearm, the hammer assembly having a user-actuated hammer with a convex impact surface positionable at chosen positions on the sawblade by three-dimensional user manipulation of the hammer assembly supported by the articulated tool arm,
• wherein the user-actuated hammer is actuated in response to a user engaging the user-operated actuation device.

A sawbenching method for reworking a sawblade to flatten the sawblade, the method comprising:

• placing a sawblade on a support surface of an anvil;
• checking the sawblade for any unevenness;
• noting a location of an unevenness;
• accessing a sawbenching assembly, the sawbenching assembly comprising an articulated tool arm and a hammer assembly,
• the articulated tool arm comprising a tool arm support, and a scissors linkage arm having first and second ends, the first end pivotally connected to the tool arm support for rotation about a first axis, and the second end movable generally vertically, and
• the hammer assembly pivotally connected to the second end of the scissors linkage arm for rotation about a second axis and for generally vertical movement with the second end of the scissors linkage arm, the hammer assembly having a user-actuated hammer with an impact surface positionable at chosen positions on the sawblade by three-dimensional user manipulation of the hammer assembly supported by the articulated tool arm;
• positioning the user-actuated hammer at the noted location on the sawblade by manipulation of the articulated tool arm with a weight of the hammer assembly being at least partially supported by the articulated tool arm;
• actuating the user-actuated hammer causing the user-actuated hammer to strike the sawblade at the noted location;
• rechecking the sawblade at the noted location for any improvement in the unevenness;
• and
• repeating the positioning, actuating and rechecking as needed.