A cutting apparatus includes a blade changing apparatus for changing a cutting blade mounted on a spindle of a first cutting unit and changing a cutting blade mounted on a spindle of a second cutting unit. The blade changing apparatus includes a nut mounting and demounting unit for mounting and demounting a nut in each of the first and second cutting units and a blade mounting and demounting unit for mounting and demounting the cutting blade in each of the first and second cutting units. The nut mounting and demounting unit includes a rotating shaft, a first nut rotating portion fixed to one end of the rotating shaft, a second nut rotating portion fixed to the other end of the rotating shaft, a motor, and a power transmitting unit connected to the motor and the rotating shaft.

There is provided a cutting apparatus that cuts a workpiece by a cutting blade. The cutting apparatus includes a chuck table that holds a board in which a groove is formed through cutting of the board by the cutting blade, a cutting unit having a spindle and a mount flange that is fixed to a tip part of the spindle and on which the cutting blade is mounted, and a replacement apparatus that replaces the cutting blade mounted on the mount flange with the cutting blade stored in a blade storing part and replaces the board placed on the chuck table with the board stored in a board storing part. The replacement apparatus includes a holding part that holds the cutting blade and the board under suction.

A cutting apparatus cuts a workpiece by a cutting blade. The cutting apparatus includes a mount flange on which the cutting blade is mounted and a replacement apparatus that replaces the cutting blade mounted on the mount flange with the cutting blade for replacement. The replacement apparatus includes a rotating part, a first holding part that holds the cutting blade mounted on the mount flange on a front surface side, a second holding part that holds the cutting blade for replacement on a front surface side, and a nut rotation part that has a nut holding part that holds a nut for fixing the cutting blade to the mount flange and rotates the nut held by the nut holding part. The rotating part is coupled to the first holding part, the second holding part, and the nut rotation part.

A device (1) for automatically changing sanding discs (12) includes a stacking device (10) for a plurality of grinding discs (12) and a guide element (16) for orienting the suction openings (32) in the grinding discs (12) along a common central axis (18), wherein the guide element (16) is arranged eccentrically with regard to the central axis (18). A positioning element (17) is provided for positioning a tool head of a grinding device, wherein the positioning element (17) and the guide element (16) are mounted in a floating manner. A device (1) for automatically changing grinding discs (12) includes a detachment device (50), wherein the detachment device (50) has a bearing surface (51) for a grinding-disc receptacle. The bearing surface (51) has an opening (52), the diameter of which is greater than the diameter of the grinding disc (12). A separating element (53) is arranged above the opening (52). A system includes a device (1) for automatically changing grinding discs (12) containing a stacking device (10) and a detachment device (50).

A device (1) for automatically changing sanding discs (12) includes a stacking device (10) for a plurality of grinding discs (12) and a guide element (16) for orienting the suction openings (32) in the grinding discs (12) along a common central axis (18), wherein the guide element (16) is arranged eccentrically with regard to the central axis (18). A positioning element (17) is provided for positioning a tool head of a grinding device, wherein the positioning element (17) and the guide element (16) are mounted in a floating manner. A device (1) for automatically changing grinding discs (12) includes a detachment device (50), wherein the detachment device (50) has a bearing surface (51) for a grinding-disc receptacle. The bearing surface (51) has an opening (52), the diameter of which is greater than the diameter of the grinding disc (12). A separating element (53) is arranged above the opening (52). A system includes a device (1) for automatically changing grinding discs (12) containing a stacking device (10) and a detachment device (50).

A cutting apparatus includes a blade changing unit demounting an old cutting blade from a blade mount and mounting a new cutting blade to the blade mount. The blade changing unit includes a blade holder for holding a support base of each cutting blade and a moving portion for moving the blade holder in the axial direction of a boss portion of the blade mount in the condition where each cutting blade is held by the blade holder, thereby mounting the new cutting blade to the boss portion or demounting the old cutting blade from the boss portion. The cutting apparatus further includes a control unit controlling the blade changing unit. The control unit measures a signal indicating a force applied to the moving portion in mounting or demounting, and determines the condition of the blade changing unit and blade mount according to the signal measured by the measuring portion.

A blade mounting and dismounting jig is provided for mounting a blade on and dismounting a blade from a flange of a cutting apparatus which includes a boss, a blade mount for mounting the blade fitted thereover, the flange having an annular end face for supporting the blade thereon and being fixed to a distal end of a spindle, and a holder that cooperates with the flange in gripping and securing the blade in position. The blade mounting and dismounting jig includes a cylindrical jig body, a grip coupled to the jig body and having a diameter larger than the jig body, a plurality of first air ejection ports defined in a distal end portion of the jig body, a plurality of second air ejection ports defined in the jig body at a juncture between the jig body and the grip.

A cutting apparatus includes a mount flange having a mount land that has a surface for holding a cutting blade as a consumable part, a changing apparatus for changing cutting blades, and a moving unit for moving the changing apparatus between a changing position for changing cutting blades and a retracted position. The changing apparatus includes a rotational shaft, a first holder for holding a used cutting blade, the first holder having a first holding surface facing in an outward direction from the rotational shaft perpendicularly to the rotational shaft, and a second holder for holding a replacement cutting blade, the second holder being disposed in a position angularly spaced a predetermined angle from the first holder around the rotational shaft, the second holder having a second holding surface facing in an outward direction from the rotational shaft perpendicularly to the rotational shaft.

A cutting blade supplying apparatus includes a cutting blade stocker that stocks a plurality of cutting blades, a carrying unit that carries out the cutting blade from the cutting blade stocker and carries the cutting blade to a cutting apparatus, a transferring unit that transfers the cutting blade carried by the carrying unit to a blade replacing unit of the cutting apparatus, and a control unit. The control unit selects the cutting blade needed by the cutting apparatus and causes the cutting blade to be carried by the carrying unit to the cutting apparatus.

A cutting apparatus includes a blade changing apparatus for changing a cutting blade mounted on a spindle of a first cutting unit and changing a cutting blade mounted on a spindle of a second cutting unit. The blade changing apparatus includes a nut mounting and demounting unit for mounting and demounting a nut in each of the first and second cutting units and a blade mounting and demounting unit for mounting and demounting the cutting blade in each of the first and second cutting units. The nut mounting and demounting unit includes a rotating shaft, a first nut rotating portion fixed to one end of the rotating shaft, a second nut rotating portion fixed to the other end of the rotating shaft, a motor, and a power transmitting unit connected to the motor and the rotating shaft.