Polishing tool holder, polishing tool, and polishing system

A polishing system comprising:

• a polishing device comprising a polishing tool including a grinding member holder and a grinding member held in the grinding member holder, and a polishing tool holder including a shank connectable to a spindle of a machine tool, a support mechanism configured to support the polishing tool such that the polishing tool is movable in an axial direction of the shank, a drive source, and a moving mechanism configured to move the polishing tool in the axial direction;
• and a cloud computer communicatively connected to the polishing tool holder via a network, wherein
• the polishing tool holder includes a control unit configured to drive and control the drive source based on a drive command, a rotation detector configured to detect a rotation state of being rotated by the machine tool, a power supply configured to supply power to the drive source and the control unit, and a communication unit configured to perform communication with the cloud computer,
• the communication unit transmits an output from the rotation detector to the cloud computer, receives the drive command from the cloud computer, and inputs the drive command to the control unit,
• the cloud computer includes a storage unit and a polishing device control unit, the storage unit being configured to store and retain a reference dimension, a polishing operation count, and a wear pattern, the reference dimension being a dimension of the grinding member at a point in time when the polishing tool is supported on the support mechanism, the polishing operation count being a number of times the rotation detector detects the rotation state, the wear pattern associating a wear amount by which the grinding member with the reference dimension is worn by a single polishing operation of polishing a workpiece with the polishing operation count, and
• the polishing device control unit includes:
• a polishing operation count updating unit configured to, when the rotation detector detects the rotation state, calculate a new polishing operation count by adding 1 to the polishing operation count and update the polishing operation count in the storage unit;
• a wear amount acquiring unit configured to, when the polishing operation count is calculated, acquire the wear amount by referring to the wear pattern based on the polishing operation count;
• a drive command issuing unit configured to, when termination of the rotation state is detected based on an output from the rotation detector, issue the drive command to perform a grinding member protruding operation that drives the drive source and operates the moving mechanism to move the polishing tool to an opposite side of the shank by a distance corresponding to the wear amount;
• and a command transmitting unit configured to, when the drive command is issued, transmit the drive command to the polishing tool holder.