A ball end milling cutter

Abstract

The invention discloses a ball end milling cutter, which comprises a cutting part and a shank; the cutting part includes a ball end cutting part and a helical cutting part, and the ball end cutting part contains a bottom cutting edge and a tooth space surface; the helical The cutting part contains a peripheral cutting edge, a rake face, a flank face and a chip removal groove; the bottom cutting edge of the ball head cutting part is composed of at least one straight cutting edge and at least one S-shaped cutting edge arranged alternately; and the The edge shape of the straight cutting edge near the center is linear, and as it extends to the outer peripheral side, the straight line gradually transitions to a circular arc, and the radius of curvature of the circular arc gradually decreases until it connects with the helical cutting part. The invention can not only slow down the vibration of the cutting tool during the cutting process, prevent the cutting edge from chipping, but also solve the problem that the cutting edge of the traditional ball head is easy to block chips, avoid the secondary cutting of the cutting edge, and alleviate the wear of the cutting edge of the bottom edge, thereby Improve tool performance.

Description

Technical field [0001] The present invention relates to the field of tool technology, and more particularly to a ball milling cutter. Background technique [0002] The ball milling cutter is a tool for milling of various curved surfaces, arc trenches. [0003] figure 1 It is a schematic structural diagram of a prior art ball milling cutter. figure 2 Yes figure 1 A direction map of the ball head milling cutter, image 3 Yes figure 2 Schematic diagram of the cutting edge of the ball head milling cutter, Figure 4 Be along figure 1 Cross-sectional view of the B-B line; see Figure 1 to 4 As shown, the prior art of such a ball head milling cutter comprises a cutting portion 100 and a handle portion 101, a cutting portion 100 comprising a ball head cutting portion 102 and a helical cutting portion 103, a ball head cutting portion 102 has a S-shaped bottom cutting edge. The 104 and the gamfors surface 109, along the radius of the ball, 45 ° in the axis, and the insertion surface of the c...

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