| 摘要 |
<p>The milling cutter (10) comprises: a main body (11) including a surface having a cup-shaped concavity (16) for receiving an end of an electrode; two slits (20, 21) radially opening into the concavity for receiving cutting blades (22, 23) of complementary shape whose edge extends away from a wall of the concavity; and a focus unit for grinding a side of the electrode. A radial plate is formed in a center portion of the concavity, and is partially formed close to a base of the blades. Each blade includes a depression portion (36) in its base. The milling cutter (10) comprises: a main body (11) including a surface having a cup-shaped concavity (16) for receiving an end of an electrode; two slits (20, 21) radially opening into the concavity for receiving cutting blades (22, 23) of complementary shape whose edge extends away from a wall of the concavity; and a focus unit for grinding a side of the electrode. A radial plate is formed in a center portion of the concavity, and is partially formed close to a base of the blades. Each blade includes a depression portion in its base. The concavity forms a shoulder above a slope of the blade, where the height of the shoulder is decreased with measurement where the slope rises. The height of a cutting line relative to the base of the shoulder is greater than the height of the shoulder along the slope. The slope of the blade forms an undercut that varies such that the cutting is more aggressive on the blank than to the forefront of the electrode.</p> |
