Apparatus, assemblies, and/or systems related to material removal are disclosed, such as saws, grinders, polishers, and/or more general material preparation and/or testing machines, for example. A material removal system may include a material removal machine that is configured to move via a material removal assembly. The material removal machine also includes a material removal tool configured to spin on a spindle at the urging of a tool actuator. The tool actuator is integrated into the material removal machine, such that the tool actuator moves along with the material removal machine.

An up-and-down motion mechanism for a belt sander including a continuous loop of sandpaper mounted on two end drums, includes a worktable including an opening with the belt sander moveably disposed therethrough, two bifurcations on an underside, and a housing mounted to the underside; a base releasably secured to the worktable; an electric motor in the housing and configured to repetitively move up-and-down relative to the worktable, the motor including an upper motor shaft rotatably connected to one drum, a lower worm screw, and two legs; and a transmitting assembly disposed in the housing and including a rotational shaft rotatably disposed through the legs, a worm wheel with the rotational shaft disposed through and meshing with the worm screw, two cams secured to two ends of the rotational shaft respectively, and two links each having one end connected to one arm and the other end connected to one bifurcation.

An up-and-down motion mechanism for a belt sander including a continuous loop of sandpaper mounted on two end drums, includes a worktable including an opening with the belt sander moveably disposed therethrough, two bifurcations on an underside, and a housing mounted to the underside; a base releasably secured to the worktable; an electric motor in the housing and configured to repetitively move up-and-down relative to the worktable, the motor including an upper motor shaft rotatably connected to one drum, a lower worm screw, and two legs; and a transmitting assembly disposed in the housing and including a rotational shaft rotatably disposed through the legs, a worm wheel with the rotational shaft disposed through and meshing with the worm screw, two cams secured to two ends of the rotational shaft respectively, and two links each having one end connected to one arm and the other end connected to one bifurcation.

A corrective grinding device for machining a surface to be ground (2A) of a part of revolution (2) with a main central axis (X2), comprises a base (5) to be fixed on the frame (3), a machining head (10) comprising an abrasive belt (11) which is guided along a belt path (12) so as to be pressed against the surface to be ground (2A) in a first penetration direction (Y10), a belt-driving motor (16) arranged to drive the abrasive belt (11) in motion along the belt path (12), a head movement system (23) for moving the machining head (10) on the base (5) in a second feed direction (X10) along the main central axis (X2). In orthogonal projection in a base plane (P10) defined by the feed direction (X10) and the penetration direction (Y10), the projected surface of the abrasive belt (11) overlaps the projected surface of the stator (17) of the belt-driving motor (16).

A corrective grinding device for machining a surface to be ground (2A) of a part of revolution (2) with a main central axis (X2), comprises a base (5) to be fixed on the frame (3), a machining head (10) comprising an abrasive belt (11) which is guided along a belt path (12) so as to be pressed against the surface to be ground (2A) in a first penetration direction (Y10), a belt-driving motor (16) arranged to drive the abrasive belt (11) in motion along the belt path (12), a head movement system (23) for moving the machining head (10) on the base (5) in a second feed direction (X10) along the main central axis (X2). In orthogonal projection in a base plane (P10) defined by the feed direction (X10) and the penetration direction (Y10), the projected surface of the abrasive belt (11) overlaps the projected surface of the stator (17) of the belt-driving motor (16).

A portable system for imparting a reciprocating motion between a driving member and a driven member. The driving member has an upper and lower surfaces joined by one or more edges and includes a battery-powered drive mechanism. The driven member includes a treatment surface. First and second spaced apart studs extend from one of the members, and first and second spaced apart slots are formed in the other member. A locating recess is formed in each of the slots into which the studs are received. The drive mechanism is connected to one of the studs to impart a linear reciprocating motion thereto when the driven member is attached to the driving member. The connection between the driving member and the driven member is effected by each stud being entered into the respective slot and then moved into the respective locating recess by a twist-fit action.

A portable system for imparting a reciprocating motion between a driving member and a driven member. The driving member has an upper and lower surfaces joined by one or more edges and includes a battery-powered drive mechanism. The driven member includes a treatment surface. First and second spaced apart studs extend from one of the members, and first and second spaced apart slots are formed in the other member. A locating recess is formed in each of the slots into which the studs are received. The drive mechanism is connected to one of the studs to impart a linear reciprocating motion thereto when the driven member is attached to the driving member. The connection between the driving member and the driven member is effected by each stud being entered into the respective slot and then moved into the respective locating recess by a twist-fit action.

The invention relates to a sample carrier for a sample (70). Said sample carrier comprises a supporting base (10), a carriage (20) having a receiving region (30) for the sample (70), the carriage (20) being supported on the supporting base (10), a guide (40), the carriage (20) being movably arranged along the guide (40), and a disc (60) that is rotationally movable about an axis of rotation (50), said disc being operatively connected to the carriage (20), wherein a center (65) of the disc (60) is located outside of the axis of rotation (50).

The invention relates to a sample carrier for a sample (70). Said sample carrier comprises a supporting base (10), a carriage (20) having a receiving region (30) for the sample (70), the carriage (20) being supported on the supporting base (10), a guide (40), the carriage (20) being movably arranged along the guide (40), and a disc (60) that is rotationally movable about an axis of rotation (50), said disc being operatively connected to the carriage (20), wherein a center (65) of the disc (60) is located outside of the axis of rotation (50).

A double-face polishing device and a method capable of controlling rigidity of a polishing pad through a cluster dynamic magnetic field are provided. A whole process from double-face rough polishing to precision polishing of a workpiece is implemented by adjusting a rigidity of a flexible polishing pad. The double-face polishing device capable of controlling rigidity of a polishing pad through a cluster dynamic magnetic field includes a variable-rigidity cluster magnetically-controlled polishing pad generating mechanism, a workpiece fast clamping mechanism and a workpiece movement driving mechanism. The variable-rigidity cluster magnetically-controlled polishing pad generating mechanism includes a first magnetic field generating block and a second magnetic field generating block that are symmetrically arranged, wherein the first magnetic field generating block and the second magnetic field generating block each include a shell, a deflection spindle, an eccentric camshaft, a magnet mounting base, a permanent magnet and a motor, the workpiece fast clamping mechanism includes a working tank, a clamping plate, a connection rod, a hinge plate, a fixing hinge, a square magnet, an electrical soft iron block, an annular cast iron and a strip-shaped permanent magnet, and the workpiece movement driving mechanism includes a support block, a cross beam, a horizontal linear motor, a vertical beam and a vertical linear motor.