Abstract: A method for machining curved surface includes the flowing steps. A lathe is provided. The lathe includes a work table and a feeding device. The feeding device has a cutter. A workpiece is held on the work table. The work table rotates the workpiece. The feeding device controls the cutter to move backwards and forwards at a high speed to machine the workpiece circumferentially. The feeding device moves in a plane relative to the work table to machine the curved surface.

Abstract: A lathe control system used for three dimensional curved surface machining includes an input module, a control module, a work table, a feeding module, a first sliding module, a second sliding module, and a cutter. The control module is electrically connected with the input module, the feeding module, the first sliding module, and the second sliding module. The first sliding module drives the feeding module to move along a first direction. The second sliding module drives the feeding module to move along a second direction perpendicular to the first direction. The cutter is positioned on the feeding module. The feeding module is capable of driving the cutter to move back and forth along a third direction under the control of the control module. The third direction is perpendicular to first and second direction.

Abstract: A lathe includes a machine support, a work table, two cross beams and a feeding device. The work table is positioned on the machine support. The two cross beams are mounted on the machine support above the work table. The feeding device includes a cutter. The feeding device is slidably assembled between the two cross beams to obtain support from opposite sides of the two cross beams.

Abstract: A feeding device includes a tool holder, a cutter, a feeding mechanism and a mounting seat. The cutter is positioned on the tool holder. The mounting seat has at least one guiding portion. The tool holder is slidably engaged with the at least one guiding portion. The feeding mechanism includes at least two drivers. Each driver includes a forcer and a stator. The forcers are mounted in the mounting seat, the stators are fixedly positioned on the tool holder. Interactions between alternating magnetic fields produced by the forcers and magnetic fields produced by the stators drive the tool holder and the cutter to backwards and forwards under precise control along the guiding portion.

Abstract: A lathe includes a machine support, a work table, a moving device and a feeding device. The work table is rotatably positioned on the machine support for driving a workpiece placed on the work table to rotate. The moving device is movably mounted, slidably on the machine support along a first direction above the work table. The feeding device is slidably positioned on the moving device along a second direction vertical to the first direction, the feeding device includes a cutter. The feeding device drives the cutter backwards and forwards under precise control at high speed along a third orthogonal direction for machining the workpiece.

Abstract: A workpiece has non-rotary curved surface and edges. The workpiece is machined by a lathe. The lathe includes a cutter and a work table under the cutter. The worktable is configured for driving the workpiece to rotate. The non-rotary curved surface of the workpiece has a good finish because the cutter moves along a spiral cutting path on the workpiece at high speed continuously during the machining.

Abstract: A waxing device is used for applying a waxing treatment to a polishing wheel, and includes a supporting assembly, an adjusting assembly, a driving mechanism, a mounting assembly, a motor, a wax block and a resisting mechanism. The supporting assembly includes a sliding rail, and the adjusting assembly is slidably positioned on the sliding rail; the driving mechanism is mounted on the adjusting assembly; the mounting assembly includes a mounting member positioned on the driving mechanism; the motor is mounted on mounting member; the wax block is positioned on the motor and rotated by the motor; the resisting mechanism is positioned on the supporting assembly and resists the adjusting assembly for adjusting a pressure applied to the polishing wheel during the waxing process.

Abstract: A drainage device includes a closed chamber, a liquid pumping mechanism, and a liquid discharge mechanism. The drainage device can also include a controller. The closed chamber may be filled with liquid and gas for discharge. The liquid pumping mechanism pumps the liquid in the closed chamber, and prevents the liquid in the liquid pumping mechanism from flowing back to the closed chamber. The liquid discharge mechanism discharges the liquid in the liquid pumping mechanism to the outside, and prevents outside air from flowing into the closed chamber.

Abstract: A drainage device for draining liquid out of a closed chamber includes an air cylinder, a driving assembly, a first channel, a second channel, a first sealing assembly, a second sealing assembly, and a controller. The air cylinder includes a main body defining a receiving chamber, an action piston positioned in the receiving chamber of the main body, and a connecting rod connected to the action piston. The main body defines a liquid inlet and a liquid outlet, both of which communicate with the receiving chamber, and the presence of a fixed piston with a seal in each of the inlet and outlet creates a double-acting one-way valve when the action piston is moved up and down.