Methods and machine tools for grinding discs. The machine tool comprises two grinding units with respective grinding spindles on which grinding wheels are arranged and a disc unit that comprises a disc spindle on which the disc to be grinded is arranged. The rotation axes of the grinding spindles are perpendicular to the disc spindle rotation axis. The grinding wheels comprise respective grinding surfaces which are perpendicular to the rotation axis of the disc spindle. The grinding surfaces have a width that is equal or greater than the width of the main surfaces of the disc. The two grinding units are configured to simultaneously move relative to the disc unit in an axis that is parallel to the rotation axis of the disc spindle and in opposite directions such that, in use, the grinding surfaces simultaneously contact opposite surfaces of the disc to grind them down.

A wheel deburring device. A motor II drives an upper brush to rotate, cylinders II enable the upper brush to fall through posts III, and burrs of a front surface can be removed when the upper brush is in contact with the front surface of a wheel; a motor I enables an outer ring and a geared ring I to rotate through a belt I; a motor III enables an inner ring and a geared ring II to rotate through a belt II, directions of rotation of the inner ring and the geared ring II are opposite to that of the outer ring, and brushes are driven to rotate through a gear; and cylinders IV enable a lower brush to rise through guide posts I, and burrs of a back cavity of the wheel can be removed when the lower brush is in contact with that back cavity.

An automatic machine and an automatic method for grinding the edges of glass sheets are disclosed. The machine is provided with a machine body with motorized support and conveyance rollers or belts, an input conveyor with motorized support and conveyance rollers or belts, an output conveyor with motorized support and conveyance rollers and belts. There are at least two elements for conveying the glass sheets, a lower one and an upper one, which actuate respectively the synchronous motions about a lower axis and an upper axis, which engage and convey the glass sheets, which are interfaced alternately, for example the odd sheets with the lower conveyance elements and the even sheets with the upper conveyance.

A grinding machine includes a main part and an end case. A driving unit is connected to the end case and includes a first motor which has an output shaft with a groove. A grinding unit is connected to the end case, and cantilevered above the main part. The grinding unit includes a grinding wheel set which has a central axle with a slide. The slide is located in the groove of the output shaft of the first motor. A driving wheel is connected to the central axle. An adjustment device includes a second motor which drives an eccentric unit that has an eccentric axle, and the eccentric axle extends through a bearing which is located in a recess formed to the driving wheel. The driving wheel is driven by the eccentric unit to move the grinding wheel set of the grinding unit left and right.

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.

A wheel conformal burr brushing device includes a lower lifting driving system, a central burr brushing system, a lower gear lifting unit, first burr brushing systems, second burr brushing systems, a synchronous clamping driving system and an upper burr brushing system.

The invention relates to a honing machine and to a method for carrying out honing operations on orthogonally aligned bores in a workpiece, in particular for honing cylinder bores and a bearing race bore in a cylinder crankcase.

A method for treating an interior weld joint located along an inner surface of a pipe includes the steps of: (a) advancing an internal grinder device within the pipe to the interior weld joint, wherein the internal grinder device includes a hollow housing that has a first open end and a first grinding implement that is disposed within the hollow housing and coupled thereto with a first biasing member; and (b) controllably rotating the hollow housing to at least a threshold speed at which time and under centrifugal force, the first grinding implement moves from an at rest retracted position to a deployed position in which the first grinding implement extends radially beyond the first open end for contacting and grinding the interior weld joint as the hollow housing and the first grinding implement are rotated.

A workpiece grinding method includes a groove formation step, a groove removal step, and a full surface grinding step. In the groove formation step, the workpiece is ground by performing grinding feed of a grinding unit while rotating a spindle without rotation of a chuck table, so that an arcuate groove is formed with a depth not reaching a finish thickness on a side of a back surface of the workpiece. In the groove removal step, rotation of the chuck table is started with the spindle kept rotating, so that the groove is ground at side walls thereof and is removed from the workpiece. In the full surface grinding step, grinding feed of the grinding unit is performed while the spindle and chuck table are rotated, so that the workpiece is ground in an entirety thereof on the side of the back surface until the workpiece has the finish thickness.

An apparatus for machining flat workpieces has a machine frame including a workpiece support and at least one carrier unit positionable relative to the workpiece support The apparatus has a first and at least a second machining head, each machining head being connected to the carrier unit and each machining head comprising a tool carrier that is mounted rotatably about a first axis perpendicular to the workpiece support and that carries at least one tool that is mounted on the tool carrier eccentrically to the first axis rotatably about a second axis perpendicular to the workpiece support and is connected to a planet wheel that is gear-engaged with a sun wheel that is coaxial to the first axis. The tool carriers of the machining heads are drivable by at least a first drive unit The tool carrier of the first machining head is arranged such that it is movable in a shifting range (V1) along the first axis relative to the carrier unit Further, the tool carrier of the second machining head is arranged such that it is movable in a shifting area (V2) along the first axis relative to the carrier unit