Saw Blade Back Edge Geometry for Stress Reduction

The patent changes the geometric parameters of the back edge from conventional straight or simple curved profiles to a complex multi-segment profile with varying angles (first angle α1, second angle α2, third angle α3). This parameter change allows the back edge to better conform to the workpiece surface, distributing contact pressure more evenly and reducing stress concentrations that lead to fatigue failure, thereby extending service life while maintaining manufacturing precision through controlled forming processes

The back edge is segmented into multiple distinct sections, each with a specific angle (α1, α2, α3) and length (L1, L2, L3). This segmentation allows each section to perform a specific function in distributing contact pressure, with the first section handling initial contact, the second section managing intermediate pressure distribution, and the third section providing final support. This modular geometric structure reduces overall contact pressure and endurance stresses while making the complex geometry manageable through standardized forming techniques

The back edge geometry is pre-formed during the blade manufacturing process using controlled forming techniques that establish the multi-angle profile (α1, α2, α3) before the blade enters service. This preliminary action ensures that the stress-reducing geometric features are already in place, allowing the blade to operate with reduced stress concentrations from the first use. The forming process incorporates built-in precision controls that maintain angle tolerances without requiring additional post-manufacturing adjustments