The invention relates to a demolition robot (1), comprising a robot arm (2) with a saw tool (3) with an exchangeable saw blade (5), wherein the saw tool comprises a rotatable spindle (4) with an end portion (4.1) and a saw blade comprising a hub (6), and the saw blade hub is releasably arranged on the end portion (4.1) of the spindle with a torque-transmitting connection (7), wherein a release mechanism (30) for automatic exchange of the saw blade (5) is arranged on the robot arm.

A cutting unit includes a spindle housing, a spindle, a mounter fixed to the front end portion of the spindle for supporting a cutting blade, and a fixing flange for fixing the cutting blade to the mounter. The mounter includes a boss portion for axially slidably supporting the fixing flange, the boss portion being fitted to an engaging hole formed in a central portion of the fixing flange, a flange portion projecting radially outward from the outer circumference of the boss portion, the flange portion having a supporting surface for supporting the cutting blade on the front side opposed to the fixing flange, and a cylindrical portion formed on the rear side of the flange portion. The flange portion has a suction hole opening. The cylindrical portion has a communication passage communicating with the suction hole. The communication passage is connected through a rotary joint to a suction unit.

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.

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.

In order to mill, drill, saw or the like in the offshore sector, subsea processing machines are used which comprise a tool holder with a change hub for receiving at least one rotary tool, such as for instance a milling cutter, saw, drill or the like. The tool holder preferably has a carrier body for receiving the tool hub, wherein the latter comprises a hub flange for receiving tools. The preferably centric hub ring of the change hub can be arranged on the carrier body of the tool holder and can be connected to the tool holder in such a manner as to be able to be detached and clamped by means of at least one locking apparatus.

A cutting blade mounting mechanism for mounting a cutting blade to a tip portion of a spindle includes: a blade mount mounted to the tip portion of the spindle; and an air supply unit supplying air to the blade mount. The blade mount includes: a columnar boss section inserted into a through-hole provided in an annular base of the cutting blade; a flange section projecting in a radial direction from a side of a base end of the boss section and having a support surface supporting the cutting blade; and an ejector type blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging air, and a second air passage connecting a suction port opening to a side of the support surface of the flange section and the first air passage.

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 circular saw cutting machine (1) includes a machine main body (10), an articulated robot (60), and a cutter stocker (70). A circular saw (5) is secured and interposed by a cutter clamp cylinder (CYL21) between a front end face (32) of the main spindle (21) and a cutter presser piece (50) with pins (33, 51) inserted in pin insertion holes (5b). When removing the circular saw (5), a hydraulic is switched over to cause the cutter clamp cylinder (CYL21) to perform unclamping so that the cutter presser piece (50) can be pulled out of the main spindle (21). When the articulated robot (60) performs cutter change, a main spindle motor (M10) and a brake (25) are controlled based on the rotation angle detected by a spindle stop position sensor (SE10) to stop the main spindle (21) in a predetermined home angle condition.

A circular saw cutting machine (1) includes a machine main body (10), an articulated robot (60), and a cutter stocker (70). A circular saw (5) is secured and interposed by a cutter clamp cylinder (CYL21) between a front end face (32) of the main spindle (21) and a cutter presser piece (50) with pins (33, 51) inserted in pin insertion holes (5b). When removing the circular saw (5), a hydraulic is switched over to cause the cutter clamp cylinder (CYL21) to perform unclamping so that the cutter presser piece (50) can be pulled out of the main spindle (21). When the articulated robot (60) performs cutter change, a main spindle motor (M10) and a brake (25) are controlled based on the rotation angle detected by a spindle stop position sensor (SE10) to stop the main spindle (21) in a predetermined home angle condition.

A cutting blade mounting mechanism for mounting a cutting blade to a tip portion of a spindle includes: a blade mount mounted to the tip portion of the spindle; and an air supply unit supplying air to the blade mount. The blade mount includes: a columnar boss section inserted into a through-hole provided in an annular base of the cutting blade; a flange section projecting in a radial direction from a side of a base end of the boss section and having a support surface supporting the cutting blade; and an ejector type blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging air, and a second air passage connecting a suction port opening to a side of the support surface of the flange section and the first air passage.