Cutting method and cutting device of manufacturing magnet piece forming magnet body for field pole to be arranged in rotating electric machine

A cutting device for manufacturing a magnet piece forming a magnet body for field pole to be arranged in a rotating electric machine by cutting a permanent magnet body having a plate shape with an upper surface and a lower surface, comprising:

• a support section adapted to support the magnet body in which a brittle section is formed on the lower surface along a cutting planned position at two support points from a lower side;
• a feeding device adapted to feed the magnet body to a position where the brittle section is arranged between both the support points;
• and
• a cutting device adapted to cut the magnet body into a cut magnet body and a magnet piece smaller than the cut magnet body including a coating film of the magnet body by pressing the upper side of the magnet body with a blade at a position offset rearward in a feeding direction from the brittle section between both the support points by a predetermined offset amount, wherein
• the offset amount is such a size that the magnet piece and the blade are not brought into contact with each other at the time of cutting the magnet body into the cut magnet body and the magnet piece, and movement of the magnet piece is not restricted by the blade.

A cutting device for manufacturing a magnet piece forming a magnet body for field pole to be arranged in a rotating electric machine by cutting a permanent magnet body having a plate shape with an upper surface and a lower surface, comprising:

• a support section adapted to support the magnet body in which a brittle section is formed on the lower surface along a cutting planned position at two support points from a lower side;
• feeding means for feeding the magnet body to a position where the brittle section is arranged between both the support points;
• and
• a cutting device having a blade for cutting the magnet body into a cut magnet body and a magnet piece smaller than the cut magnet body including a coating film of the magnet body by pressing the upper side of the magnet body with the blade at a position offset rearward in a feeding direction from the brittle section between both the support points by a predetermined offset amount, wherein
• the offset amount is such a size that the magnet piece and the blade are not brought into contact with each other at the time of cutting the magnet body into the cut magnet body and the magnet piece, and movement of the magnet piece is not restricted by the blade.