| 摘要 |
PROBLEM TO BE SOLVED: To prevent the generation of burrs and waviness on cut surfaces by holding cutting tools having the face angle of the cutting edge at a specified value on both sides of a steel plate such that the cutting edge is cut into the side face of the steel plate and moving the steel plate relative to the cutting tool to cut simultaneously both side faces. SOLUTION: Four sets of cutting tools 1a, 1b, 1c, 1d different from each other in the face angleαare disposed in the horizontal tandem manner on both sides of positions through which the steel plate passes. After the cutting tools are secured fixedly to tool rests 3 respectively, the steel plate 2 is horizontally delivered from an uncoiler 5 and wound up around a reel 6 while both side faces are cut. The cutting tools 1a, 1b, 1c and 1d have respectively 20 deg., 30 deg., 40 deg. and 60 deg. of face angleα. The side faces of the steel plate 2 are cut first by the cutting tool having the smallest face angle and the cutting tools are disposed in the order of the face angle such that the side faces are subsequently successively cut by the cutting tools having larger face angle. Also, each inclined angle of the edge face of the cutting tools 1a-1d is set to 0 deg..
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