CUTTING METHOD OF WORKPIECE

PROBLEM TO BE SOLVED: To provide a cutting method of a workpiece which can reduce occurrence of cracks and chipping of a cutting end part.SOLUTION: A cutting method of a workpiece 1 includes a processing step of putting a cutting blade travelling to the workpiece 1 in an upper surface of the workpiece 1 at a start of cutting, and letting the cutting blade 2 out from a lower surface 1d of the workpiece 1 at an end of cutting. The processing step includes a step of placing a part except for a cut part 5 of the lower surface 1d of the workpiece 1 on a plurality of pedestals 6 arranged separately from each other, and positioning the cut part 5 between the two adjacent pedestals 6, and cutting a contact member 4 by the cutting blade 2 in a state that the contact member 4 is arranged in a region including the cut part 5 of the lower surface 1d of the workpiece 1. 【課題】 切り終わり箇所のクラック，欠けの発生を低減できる被加工物の切断方法を提供すること。【解決手段】 被加工物１に対して走行する切断刃を切り始め時に被加工物１の上面に入れて、切り終り時に被加工物１の下面１ｄから切断刃２を出す加工工程を有する被加工物１の切断方法とし、前記加工工程は、被加工物１の下面１ｄにおける切断部位５を除く一部を、互いに離れて配設された複数の台座６の上に置き、切断部位５を隣接する２つの台座６の間に位置させるとともに、当て部材４を被加工物１の下面１ｄの切断部位５を含む領域に配設した状態で、切断刃２によって当て部材４を切る工程を含む。【選択図】 図１