A system provides in-situ surface processing of an engine blade within an aircraft engine. The system includes an endoscopic processing instrument with a variable-angle tubular shaft. The processing instrument is inserted radially through a lateral access opening into the aircraft engine in a non-angled initial configuration. The lateral access opening is downstream of the engine blade. The processing instrument has a rotatably driven tool holder at a distal end of the shaft for a surface processing tool head. In an angled working configuration, a tool head inserted into the tool holder is applied to a flow edge of the engine blade. Furthermore, a process uses the corresponding system.

An instrumented tool for surface finishing of a work-piece, the instrumented tool comprising: a tool configured to be spun and brought into contact with the work-piece while spinning; a spindle configured to provide a spinning torque to spin the tool; a flexible coupler provided between the spindle and the tool to transmit only spinning torque of the spindle to the tool; a rigid connection provided between the spindle and the tool in parallel to the flexible coupler; and a multi-axis force/torque/strain/pressure sensor attached to at least the rigid connection; wherein the rigid connection and the multi-axis force/torque sensor are decoupled from spinning of the spindle and the tool, and wherein the multi-axis force/torque sensor is configured to measure at least one of: contact force and torque between the tool and the work-piece.

An instrumented tool for surface finishing of a work-piece, the instrumented tool comprising: a tool configured to be spun and brought into contact with the work-piece while spinning; a spindle configured to provide a spinning torque to spin the tool; a flexible coupler provided between the spindle and the tool to transmit only spinning torque of the spindle to the tool; a rigid connection provided between the spindle and the tool in parallel to the flexible coupler; and a multi-axis force/torque/strain/pressure sensor attached to at least the rigid connection; wherein the rigid connection and the multi-axis force/torque sensor are decoupled from spinning of the spindle and the tool, and wherein the multi-axis force/torque sensor is configured to measure at least one of: contact force and torque between the tool and the work-piece.

An instrumented tool for surface finishing of a work-piece, the instrumented tool comprising: a tool configured to be spun and brought into contact with the work-piece while spinning; a spindle configured to provide a spinning torque to spin the tool; a flexible coupler provided between the spindle and the tool to transmit only spinning torque of the spindle to the tool; a rigid connection provided between the spindle and the tool in parallel to the flexible coupler; and a multi-axis force/torque/strain/pressure sensor attached to at least the rigid connection; wherein the rigid connection and the multi-axis force/torque sensor are decoupled from spinning of the spindle and the tool, and wherein the multi-axis force/torque sensor is configured to measure at least one of: contact force and torque between the tool and the work-piece.

In order to provide a handheld abrading machine which is of robust construction and is easy and comfortable to handle, it is proposed that the handheld abrading machine comprise a holding device for holding the abrading machine, a drive motor and a tool head, wherein the tool head is arranged on the holding device such as to be moveable by means of a moving device, wherein the tool head is pivotal relative to the holding device about one or more pivotal axes by means of the moving device and wherein a distance of the tool head from the holding device is variable by means of the moving device.

In order to provide a handheld abrading machine which is of robust construction and is easy and comfortable to handle, it is proposed that the handheld abrading machine comprise a holding device for holding the abrading machine, a drive motor and a tool head, wherein the tool head is arranged on the holding device such as to be moveable by means of a moving device, wherein the tool head is pivotal relative to the holding device about one or more pivotal axes by means of the moving device and wherein a distance of the tool head from the holding device is variable by means of the moving device.

An embodiment of a tool assembly includes a hub connected to a distal end of a spring-loaded shaft assembly disposed along a first axis. An upper hub portion is adjacent to the distal end of the spring-loaded shaft assembly aligned with the first axis, and a lower hub portion extends along a second axis, forming a nonzero angle relative to the first axis. A roller disk is joined to the lower portion of the hub, and is rotatable about the second axis parallel to the second portion of the hub. A load cell is disposed along the first axis between a proximal end of the shaft and the roller disk, and is adapted to measure a downward force applied along the shaft assembly.

Reciprocating tool accessories are presented including: a damping handle assembly; and a surface contact assembly coupled with the damping handle assembly along a distal end and the reciprocating tool along a proximal end. In some embodiments, the damping handle assembly includes: a grip portion, the grip portion defining a housing, where the grip portion includes, a reciprocal connector subassembly at least partially contained within the housing; and a contact roller portion releasably coupled with the grip portion, where the contact roller portion includes, at least one horizontal contact roller coupled with and aligned along the grip portion, and at least one vertical contact roller coupled with and extending from the grip portion along a grip portion end. In some embodiments, the grip portion further includes a contoured surface.

In order to provide a handheld abrading machine which is of robust construction and is easy and comfortable to handle, it is proposed that the handheld abrading machine comprise a holding device for holding the abrading machine, a drive motor and a tool head, wherein the tool head is arranged on the holding device such as to be moveable by means of a moving device, wherein the tool head is pivotal relative to the holding device about one or more pivotal axes by means of the moving device and wherein a distance of the tool head from the holding device is variable by means of the moving device.

In order to provide a handheld abrading machine which is of robust construction and is easy and comfortable to handle, it is proposed that the handheld abrading machine comprise a holding device for holding the abrading machine, a drive motor and a tool head, wherein the tool head is arranged on the holding device such as to be moveable by means of a moving device, wherein the tool head is pivotal relative to the holding device about one or more pivotal axes by means of the moving device and wherein a distance of the tool head from the holding device is variable by means of the moving device.