A repositionable abrasive disc mounting assembly comprises a backup pad and a clamp assembly. The backup pad has a rotational axis of use and a major surface with projections extending outwardly therefrom. The backup pad further comprises an inwardly facing centrally disposed first fastening member, and also an outwardly facing centrally disposed second fastening member. The clamp assembly comprises inner and outer clamp members for securing an abrasive disc. The inner clamp member comprises an inwardly facing centrally disposed third fastening member adapted to repositionably engage the second fastening member in a discrete number of rotational orientations. The inner clamp member further comprises an outwardly facing centrally disposed fourth fastening member. The outer clamp member comprises an inwardly facing centrally disposed fifth fastening member adapted to securely engage the fourth fastening member. A method of abrading a workpiece using the repositionable abrasive disc is also disclosed.

The present disclosure relates to abrasive articles including an abrasive member having opposing major surfaces, a working surface and an exterior attachment surface, wherein the abrasive member comprises an inorganic material having a Mohs hardness greater than about 7.0; and a magnetic member, having opposing first and second major surfaces and a corresponding magnetic force, wherein the first major surface of the magnetic member faces the exterior attachment surface. The abrasive articles of the present disclosure may include a third member. The third member is attached to the magnetic member by a magnetic force. The abrasive member with attached magnetic member is designed to be easily removed from the third member. Methods of separating an abrasive member from an abrasive article and replacing the abrasive member of an abrasive article are also provided.

A disc changing system for a robotic defect repair system is presented. The system has a first abrasive disc and a second abrasive disc. The first and second abrasive discs are coupled to a liner. The system includes an abrasive disc placement device configured to automatically: remove the first abrasive disc from the liner, transport the first abrasive disc to a robotic tool of the robotic defect repair system, and place the first abrasive disc on a backup pad coupled to the robotic tool. The system also includes an abrasive disc remover configured to automatically remove the first abrasive disc after receiving a removal signal. The system also includes a controller configured to send an instruction to the disc placement device to remove, transport and place the first abrasive disc, instruct the robotic tool to conduct an abrasive operation. The controller is also configured to send the removal signal. The controller is a processor and the instructions are stored on a non-transitory com-puter-readable medium and executed by the processor.

An apparatus (1) for carrying out the replacement of an abrasive element (20) in a machine (100) for finishing surfaces, comprises a support body (10) configured to reversibly engage the abrasive element (20). The support body (10) and the abrasive element (20) provide, at respective engagement surfaces (15,25), mutual engagement members of removable type (16,26) configured to move from an engagement position to a disengagement position by rotating about a rotational axis (110) in a first sense of rotation e, from the disengagement position to the engagement position, by rotating about the rotational axis (110) in a second sense of rotation opposite to the first one. The apparatus furthermore, comprises a displacement device (40) for moving the support body (10) in the space according to at least 1 degree of freedom. The apparatus (1), furthermore, provides at least a removal station (101) for removing an abrasive element (20) from the support body (10), or at least an application station (102) for engaging an abrasive element (20) to the support body (10).

In an automatic wet sanding apparatus including a disc and a cushion pad, a disc center hole is formed at a central portion of the disc and a pad center hole is formed at a central portion of the cushion pad. Water having been supplied to an introduction space inside a skirt is stirred as an eccentric head rotates eccentrically and thereby pushed out toward a painted surface via the disc center hole and the pad center hole with enhanced pressure. Thus, sanding dust resulting from automatic wet sanding can be washed away toward an outer circumferential side by the water that is pushed out toward the outer circumferential side, so that the likelihood of clogging due to sanding dust can be reduced and high sanding efficiency can be maintained.

A grinding tool (1) has a replaceable abrasive (4). A grinding layer (9) of the abrasive (4) faces a drive shaft (2) of the grinding tool (1). This enables a grinding of a workpiece (W) while exerting a tensile force (F). Surface areas (O) of the workpiece (W) facing away from a processor may thus be processed easily and flexibly.

Processe and system for preparing a vehicle surface (e.g., an aircraft fuselage) for painting include a preparation booth (100) which is sized and configured to house the vehicle (F). At least one robotic assembly (200a, 200b) is reciprocally movable within the preparation booth (100) relative to a longitudinal axis of the vehicle (F), and is provided with a robotic hand (230) having at least one abrasive disc (242a) attached to an attachment pad (242) of the robotic hand (230), and at least one nozzle (252a, 252b, 252c) for discharging a stream of rinse fluid. Operation of the at least one robotic assembly (230) will cause the at least one abrasive disc (242a) of the robot hand (230) to abrade the surface of the vehicle (F). The robotic hand (230) may thereafter be maneuvered so that the at least one nozzle (252a, 252b, 252c) is directed toward the abraded vehicle surface (F). A stream of rinse fluid may then be discharged through the at least one nozzle (252a, 252b, 252c) and towards the abraded surface of the vehicle (F) so as to rinse the abraded surface of particulate matter.

The present invention discloses a detachable grinding disk for an electric grinder with high adhesion efficiency, the detachable grinding disk comprising: a plate part made of a circular metal plate; a sanding part on which a grinding member is formed so that one side of the plate part has a grinding surface; and a fastening part provided in a form of a through hole at a position of a central axis of the plate part to be easily fastened to the electric grinder, wherein the plate part is formed to have a gradual curvature in such a way that a convex surface of the gradual curvature is formed toward the sanding part, thereby enabling the detachable grinding disk to be attached to the electric grinder closely, elastically, and preventing overturning during high-speed rotation.

An apparatus for verifying the presence, or the absence, of an abrasive element in a machine for finishing surfaces comprising a support body configured to removably engage the abrasive element. The support body and the abrasive element are, respectively, provided, at respective engagement surfaces with first and second engagement elements configured to move from an engagement configuration to a disengagement configuration, and vice versa. Furthermore, a displacement device is provided to move the support body in the space according to at least 1 degree of freedom. The apparatus, furthermore, provides at least a control station equipped with a control device comprising a control element having a control surface provided with third engagement elements configured to engage with the first engagement elements of the support body, and a detection device configured to detect if an engagement between the control element and the support body has taken place.

A disc tool for a processing machine for grinding and/or polishing a workpiece (W); wherein the disc tool (10A, 10B, 10B) has a carrier (20) for attachment to an output (85) of the processing machine (80); wherein a cushion element (40A, 40B, 40C) made of elastic material and a retaining wall element (41A, 41B, 41C, 41D) for retaining the cushion element (40A, 40B, 40C, 61) are arranged on the carrier (20); wherein the retaining wall element (41A, 41B, 41C, 41D) is held on the carrier (20) by means of retaining bolts (35); wherein retaining bolt passage openings (48) of the retaining wall element (41A, 41B, 41C, 41D) extending through retaining mounts (28), of the carrier (20) are accommodated along bolt sections (36) of the retaining bolts (35) extending along the bolt longitudinal axes (BL), and the retaining wall element (41A, 41B, 41C, 41D) is held between bolt heads (37) of the retaining bolts (35) and the carrier (20); and wherein an adhesive layer (50) is arranged on a side of the retaining wall element (41A, 41B, 41C, 41D) opposite the carrier (20), on which adhesive layer a processing means (70) for grinding and/or polishing the workpiece (W) can be releasably attached to the disc tool (10A, 10B, 10B). The adhesive layer (50) has recesses (52) assigned to the bolt heads (37).