A dicing machine including a flange cover which covers the blade and is
divided into two such that a first cover is openable. An interlock device
is provided so that a blade attaching and detaching device cannot be
attached when the first cover is at the closing position, the first cover
cannot turn to the closing position when the blade attaching and detaching
device is attached, and the processing of the work is not started when
detected radiation of a blade breakage detector, attached to the first
cover, is not reduced by a predetermined amount. Consequently, the blade
and the work are prevented from being damaged by processing the work
without applying coolant, the mechanism of the dicing machine and the
blade attaching and detaching device are prevented from being damaged
without detaching the blade attaching and detaching device, and the work
is prevented from being being unprocessed.
