Abstract: A method for determining a consistency coefficient of a power-law cement grout includes: determining a water-cement ratio of the power-law cement grout; according to engineering practice requirements, determining a time required to determine the consistency coefficient of the power-law cement grout; and obtaining the consistency coefficient of the power-law cement grout. The method is accurate and reliable, requires less calculation, etc.; and has very high practical value and popularization value in environmental protection and ecological restoration.

Abstract: A clamping device configured to automatically pull and clamp workpieces includes a clamping module and a driving module. The clamping module includes a sliding block, two clamping members positioned at two sides of the sliding block, and a connecting plate connected to one end of the sliding block. The driving module includes a driving member. The sliding block defines at least one pair of guiding grooves, and a distance between the paired guiding grooves is increased in a direction toward the connecting plate. The two clamping members are mounted on the guiding grooves of the sliding block in a sliding way. The connecting plate is fixedly connected to the driving member. When the connecting plate and the sliding plate are driven by the driving member, the two clamping members move toward or away from each other to clamp or release the workpiece.

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 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 engaged with the at least one guiding portion. The feeding mechanism drives the tool holder and the cutter to controllably reciprocate along the at least one gliding 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 clamping device configured to automatically pull and clamp workpieces includes a clamping module and a driving module. The clamping module includes a sliding block, two clamping members positioned at two sides of the sliding block, and a connecting plate connected to one end of the sliding block. The driving module includes a driving member. The sliding block defines at least one pair of guiding grooves, and a distance between the paired guiding grooves is increased in a direction toward the connecting plate. The two clamping members are mounted on the guiding grooves of the sliding block in a sliding way. The connecting plate is fixedly connected to the driving member. When the connecting plate and the sliding plate are driven by the driving member, the two clamping members move toward or away from each other to clamp or release the workpiece.

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 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 machine tool includes a machine support, a work table positioned on the machine support, a moving device and a feeding device. The moving device is movably mounted 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 at ninety degrees from the first direction. The feeding device includes a feeding mechanism and a cutter. The feeding mechanism drives the tool holder and the cutter to move back and forth along a third orthogonal direction.

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 working table positioned on the machine support, a rotating driver, a moving device, and a feeding device. The rotating driver rotates the work table. The moving device includes at least one cross beam, at least one first driving mechanism, and at least one second driving mechanism. The cross beam is movably positioned on the machine support above the working table. The feeding device is movably positioned on the at least one cross beam, and includes a feeding driving mechanism and a cutter. The first driving mechanism drives the cross beam to move along a first direction, and the second driving mechanism drives the feeding device to move along a second direction at about ninety degrees from the first direction. The feeding mechanism drives the cutter to move backwards and forwards along a third direction perpendicular to the first and second direction.

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 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 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 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 engaged with the at least one guiding portion. The feeding mechanism drives the tool holder and the cutter to controllably reciprocate along the at least one gliding portion.

Abstract: A lathe includes a machine support, a working table positioned on the machine support, a rotating driver, a moving device, and a feeding device. The rotating driver rotates the work table. The moving device includes at least one cross beam, at least one first driving mechanism, and at least one second driving mechanism. The cross beam is movably positioned on the machine support above the working table. The feeding device is movably positioned on the at least one cross beam, and includes a feeding driving mechanism and a cutter. The first driving mechanism drives the cross beam to move along a first direction, and the second driving mechanism drives the feeding device to move along a second direction at about ninety degrees from the first direction. The feeding mechanism drives the cutter to move backwards and forwards along a third direction perpendicular to the first and second direction.

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 machine tool includes a machine support, a work table positioned on the machine support, a moving device and a feeding device. The moving device is movably mounted 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 at ninety degrees from the first direction. The feeding device includes a feeding mechanism and a cutter. The feeding mechanism drives the tool holder and the cutter to move back and forth along a third orthogonal 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.