Cutting tool

A cutting tool for cutting a workpiece by contacting the workpiece that is rotating, the cutting tool comprising:

• a body portion having a bar shape extending from a first end, which is an end on a side where a cutting tip for cutting the workpiece is placed, to a second end, which is an end opposite to the first end;
• and
• a sensor unit arranged on a surface of the body portion,
• the sensor unit including
• a first sensor arranged on the surface of the body portion to detect strain of the body portion,
• a board arranged on the surface of the body portion and electrically connected to the first sensor,
• a wireless communication unit mounted on the board and transmitting a signal containing information on the strain detected by the first sensor to an outside,
• a battery arranged in the body portion and electrically connected to the board, and
• a second sensor arranged on the surface of the body portion to detect at least one of acceleration and temperature of the body portion,
• wherein the first sensor is arranged closer to the first end than the battery, and
• wherein the second sensor is arranged closer to the first end than the first sensor.

A cutting tool for cutting a workpiece by contacting the workpiece that is rotating, the cutting tool comprising:

• a body portion having a bar shape extending from a first end, which is an end on a side where a cutting tip for cutting the workpiece is placed, to a second end, which is an end opposite to the first end;
• and
• a sensor unit arranged on a surface of the body portion,
• the sensor unit including
• a first sensor arranged on the surface of the body portion to detect a first physical quantity of the body portion,
• a board arranged on the surface of the body portion and electrically connected to the first sensor,
• a wireless communication unit mounted on the board and transmitting a signal containing information on the first physical quantity detected by the first sensor to an outside, and
• a battery arranged in the body portion and electrically connected to the board,
• the first sensor being arranged closer to the first end than the battery,
• wherein the body portion has a quadrangular shape in a cross section perpendicular to a longitudinal direction,
• wherein a first recess is formed in a first surface, which is an outer peripheral surface of the body portion corresponding to one of four sides of the quadrangle,
• wherein the board and the wireless communication unit are arranged in the first recess,
• wherein the first surface is a surface, among the outer peripheral surfaces of the body portion corresponding to the respective sides of the quadrangle, that corresponds to a lateral flank of the cutting tip, and
• wherein a space in the body portion housing the battery is open at the first surface.