| 摘要 |
<p>The invention relates to hacksaw blades formed from unitary strip material or from bimetallic strip with each tooth formed wholly from the hard metal part of the strip. With conventional blades produced by conventional machining techniques such as milling, chip removal during sawing is not effected efficiently, consequent on the relatively rough nature of the e.g. milled faces of the teeth. The object of the invention is to improve hacksaw blades and is achieved by a method comprising forming along one edge of appropriate strip material, teeth at an appropriate pitch and depth, and where each tooth has first, or primary (3), and secondary (4) flank faces rearwardly a tooth tip (2) and a rake face (5) extending from the tip at a required rake angle, each tooth being formed by grinding at least the length of the first, or primary flank face (3), and to a commensurate length over the rake face extending from the tip. Preferably, the full tooth including the root between adjacent teeth is formed by grinding.</p> |
