Cutting method of flat wire, and cutting tool

1. A cutting method for cutting a flat wire covered with a film, using a pair of first blades, and a second blade that is arranged between the pair of first blades, comprising:

a step of forming tapered cuts in an upper surface of the flat wire, by the pair of first blades cutting part way into the flat wire in a thickness direction, from the upper surface of the flat wire; and

a step of cutting the flat wire by the second blade, between the two cuts, so as to form a chamfer on both side surfaces next to the upper surface of the flat wire.

2. The cutting method according to claim 1 , further comprising:

a step of precutting the film along the outer periphery of the flat wire, after cutting the flat wire; and

a step of pulling the precut film off of the flat wire.

3. The cutting method according to claim 2 , wherein

the film is precut by moving a round blade along the outer periphery of the flat wire in the step of precutting the film.

4. A cutting tool that cuts a flat wire, comprising:

a pair of first blades; and

a second blade arranged between the pair of first blades,

wherein a tapered surface that becomes thinner toward a tip end side is formed on a tip end portion of each of the two first blades;

the tapered surfaces of the pair of first blades are arranged so as to come closer to each other farther toward the tip end side; and

an inclined surface to provide a chamfer on both side surfaces of the flat wire is formed on the second blade.