| 摘要 |
<p>A structural band saw blade is provided having a cutting edge defined by a plurality of teeth spaced relative to each other, and a back edge located on an opposite side of the blade relative to the cutting edge. Each tooth of the band saw blade defines a tip, a rake face formed on one side of the tip, a primary clearance surface formed on the opposite side of the tip relative to the rake face, a secondary clearance surface formed on the opposite side of the primary clearance surface relative to the tip, and a tertiary clearance surface formed on the opposite side of the secondary clearance surface relative to the first clearance surface. The primary clearance surface defines a first acute relief angle, the secondary clearance surface defines a second acute relief angle less than the first acute relief angle, and the tertiary clearance surface defines a tertiary acute relief angle greater than the first and second relief angles. A rake face protrusion is formed on the opposite side of the rake face relative to the tip, and extends over one end of a weld zone. The rake face protrusion projects outwardly relative to a plane defined by the rake face, and the secondary and tertiary clearance surfaces project outwardly on the opposite side of the tooth relative to the rake face protrusion. One or both of the secondary and tertiary clearance surfaces extends over the weld zone on the opposite side of the tooth relative to the rake face protrusion to thereby form an increased tooth thickness at the weld zone and prevent tooth strippage. The teeth of the saw blade define a variable level height and set.</p> |
