A green smart factory energy management system for carbon reduction, includes: an eco-friendly power generator installed on one side of a building to generate first electrical energy through wind power or sunlight; a water electrolysis device for receiving surplus power of the first electrical energy remaining after operating a building, and electrolyzing water to generate hydrogen; a hydrogen storage device for storing some of the hydrogen generated by the water electrolysis device; a hydrogen fuel cell for generating second electrical energy by using some of the hydrogen generated by the water electrolysis device; a machine tool provided with an electrically driven spindle system to grip or rotate a workpiece when the second electrical energy is applied; and a distributed power management device for controlling an amount of power consumed.
machine tool holders; holding devices for machine tools, namely, workpiece holding chucks for machine tools; metalworking machines; toolholders for metalworking machines; indexing tables for metal processing machines; automatic indexing table machine for metal processing machines; metalworking machine tools; lathes for metalworking; tables for machines, namely, tables specially adapted to hold machine tools; power operated manual crimpers; collets for power tools; drill chucks for power drills; chucks for machines; reduction gears being parts of machines; gears for machines; gears for robot; gear boxes for ships or aircrafts; elevator gears; electricity generators; wind-powered installations for generating electricity, namely, wind turbines; wind-powered electricity generators
Disclosed is a machine tool ELECTRICAL DRIVING SYSTEM capable of selectively transmitting power of a motor for driving a spindle in a lathe which machines a workpiece to a rotation system including a drawbar and a spindle for driving a chuck, using a clutch mechanism. The machine tool ELECTRICAL DRIVING SYSTEM includes a housing, a hollow tubular spindle rotatably installed inside the housing, a drive pulley rotatably installed with respect to the spindle outside the spindle, a spindle motor, a drawbar installed to be linearly movable with respect to the spindle but non-rotatable relative to the spindle, a motion conversion unit configured to convert a rotary motion of the drive pulley into a forward-rearward linear motion of the drawbar, a clutch unit, a position detection unit configured to the drive pulley to detect an amount of rotation and a rotation position of the drive pulley, and a controller.
DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION (Republic of Korea)
Inventor
Chang, Junghwan
Yun, Yongseon
Ku, Bonsaeng
Abstract
Disclosed is a built-in type electric driving system of a machine tool. The system is capable of directly connecting a motor, which drives a spindle in a lathe which processes a workpiece, to an outer surface of the spindle without using a belt to rotate the spindle, and is capable of selectively transferring the power of the motor to a rotation system including a drawbar and a spindle for driving a chuck using a clutch device.
The present invention relates to an electrical driving system for a machine tool allowing, from a shelf on which an object is machined, the power of a spindle-driving motor to be selectively transmitted, by means of a clutch mechanism, to a rotating system comprising a spindle and a draw bar for driving a chuck, the electrical driving system according to the present invention comprising: a housing; a hollow pipe-shaped spindle disposed inside the housing so as to allow rotating with respect thereto; a driving pulley disposed outside the spindle so as to allow rotating with respect thereto; a spindle motor for rotating the driving pulley; a draw bar moving linearly with respect to or rotating along with the spindle, being disposed inside the spindle to allow linear axial movement but to disallow relative rotational movement with respect thereto; a movement conversion unit for converting the rotational movement of the driving pulley to the forward and backward linear movement of the draw bar; a clutch unit, disposed outside the spindle, for selectively connecting the spindle to the driving pulley or the housing; a location detection unit comprising an encoder connected to the driving pulley to detect the amount and location of the rotation thereof; and a controller for carrying out a location controlling process immediately before the switch from the spindle to clamping operating mode and from the clamping to spindle operating mode, the location controlling process rotating the driving pulley to align the location of the clutch unit on the basis of location data from the clutch unit detected by the location detection unit.
The present invention relates to an electrical driving system for a machine tool and a method for operating same, the electrical driving system transmitting the power of a spindle motor directly to a spindle by means of a driving pulley, thus allowing the power transmission efficiency to be improved. The electrical driving system for a machine tool according to the present invention comprises: a housing; a hollow pipe-shaped spindle extending in the front to back direction in the housing and disposed so as to rotate with respect thereto; a driving pulley disposed outside the spindle in the rear so as to be fixed thereto; a spindle motor for rotating the driving pulley; a chuck disposed at the front end of the spindle and provided with a jaw for clamping an object to be machined; a draw bar disposed inside the spindle to allow linear movement in the front to back direction, the front end thereof being connected so that linear movement in the front to back direction is allowed with respect to the chuck but rotational movement relative thereto is disallowed; a movement conversion means for converting the rotational power received from the driving pulley to the forward and backward movement of the draw bar; a chuck locking unit for restraining or stopping the rotational movement of the chuck with respect to the housing; a clutch unit, disposed to allow forward and backward movement between front of the spindle and rear of the chuck, for connecting the spindle to the chuck or separating the spindle therefrom to allow relative rotation; and an encoder unit for detecting the location of the rotation of the driving pulley.
DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION (Republic of Korea)
Inventor
Chang, Junghwan
Yun, Yongseon
Ku, Bonsaeng
Abstract
The present invention relates to a built-in type electric driving system of a machine tool. The system may comprise: a housing; a hollow tube-shaped spindle extending in the forward/backward direction with respect to the housing and installed to be able to rotate with regard to the housing; a built-in motor comprising a stator fixed inside the housing and a rotor fixed to the outer surface of the spindle and generating a torque between the stator and the rotor by externally applied power to rotate the rotator; a chuck installed at the front end of the spindle and including a jaw for gripping an object to be processed; a drawbar installed inside the spindle to linearly move the forward/backward and having a front end connected to the jaw; a drawbar key and a drawbar key groove, which connect the drawbar to the chuck such that the drawbar can linearly move, but cannot rotationally move; a chuck locking unit for restricting or releasing a rotational movement of the chuck with regard to the housing; a clutch unit installed to move forward/backward between the front portion of the spindle and the rear portion of the chuck so as to restrict the spindle to the chuck or separate the spindle in a rotatable manner relative to the chuck; a leadscrew formed to be fixed to the drawbar and having a thread helically formed on the outer surface thereof; a driving unit fixed to the outer surface of the spindle so as to rotate together with the spindle; and a female screw cover coupled to the driving unit so as to rotate together with driving unit, and having a thread formed on the inner peripheral surface thereof so as to be screw-coupled to the thread of the leadscrew.
DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION (Republic of Korea)
Inventor
Chang, Junghwan
Yun, Yongseon
Ku, Bonsaeng
Abstract
The present invention relates to an electrically driven high efficiency chucking system for a machine tool and a method for operating same, the system allowing the power of a motor driving a spindle in a lathe to be selectively delivered, by using a clutch tool, to a spinning system comprising a spindle and a drawbar for driving a chuck. The electrically driven chucking system according to the present invention comprises: a principal shaft (10) fixedly provided to the main body of a machine tool; a hollow tube-shaped spindle (20) provided in the interior of the principal shaft (10) to be rotatable with respect to the principal shaft (10); a spindle driving unit for delivering torque to the spindle (20); a drawbar (30), in the interior of the spindle (20), for moving rectilinearly in the axial direction in the spindle (20) or rotating with the spindle (20); a ball screw (40) provided at the rear end of the drawbar (30); a clutch unit provided on the outer surface of the spindle (20), for either joining or separating the spindle (20) and the spindle driving unit; a locking piston (81) for locking the spindle (20) to the principal shaft (10), the locking piston being provided in the principal shaft (10) so as to be movable towards the spindle (20); and a piston actuator for making the locking piston (81) reciprocally move a certain distance with respect to the principal shaft (10).
B23B 31/26 - Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle
B23Q 5/10 - Driving main working members rotary shafts, e.g. working-spindles driven essentially by electrical means
9.
ELECTRIC DRIVEN CHUCKING SYSTEM COMPRISING AUTOMATIC CLUTCH SYSTEM
The present invention relates to an electric driven chucking system comprising an automatic clutch system which enables the power of a motor driving a spindle to be selectively transmitted to a drawbar for driving a chuck and a spindle by means of a clutch mechanism in a lathe for machining a workpiece. An electric driven chucking system, according to an aspect of the present invention, comprises: a housing fixedly installed on a main body of a machine tool; a spindle in the form of a hollow tube provided inside the housing so as to be rotatable with respect to the housing; a driving member disposed outside the rear portion of the spindle so as to be rotatable relative to the spindle; a motor for rotating the driving member; a female screw cover having one side fixed to the driving member and a female screw thread formed in the central portion thereof; a drawbar which is formed inside the spindle so as to permit linear movement in an axial direction with respect to the spindle but preclude relative rotational movement and is provided with a male screw thread formed on the outer circumferential surface of the spindle; a clutch member which is installed on an outer surface of the spindle so as to be linearly movable in an axial direction with respect to the spindle and which is coupled to the driving member or the housing along the moving direction or selectively couples the spindle to either the driving member or the housing; and a clutch drive unit reciprocating the clutch member in the axial direction of the spindle.
DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION (Republic of Korea)
Inventor
Chang, Junghwan
Yun, Yongseon
Park, Dongsang
Abstract
The present invention relates to a driving device that rotates and linearly moves a shaft. An electric shaft driving device of the present invention is characterized by comprising: a housing; a linearly moving shaft installed to pass through the housing and be capable of linear reciprocal movement in an axial direction, and having screw threads formed on the outer periphery thereof; a clamping block installed inside the housing, and generating a magnetic field through an externally-applied power source; a first clamping plate and a second clamping plate installed to be capable of rotating and moving in an axial direction with respect to the linearly moving shaft (20) on the respective sides of the clamping block within the housing, and formed as magnetic bodies that are moved toward the clamping block and attached by means of the magnetic field generated in the clamping block; a cylindrical connecting member that connects the first clamping plate and the second clamping plate to each other and is inserted in the linearly moving shaft, and has female screw threads formed in the inner periphery thereof that screw couple to the screw threads of the linearly moving shaft; a linear driving unit that generates linear movement of the linearly moving shaft (20) in an axial direction by rotating the first clamping plate; a rotating shaft coaxially connected by a weight supporting member to one end of the linearly moving shaft, and installed to rotate with respect to the linearly moving shaft; and a rotation driving unit for rotating the rotating shaft with respect to the linearly moving shaft.
B23Q 5/04 - Driving main working members rotary shafts, e.g. working-spindles
B23Q 5/08 - Driving main working members rotary shafts, e.g. working-spindles driven essentially by fluid pressure or pneumatic power electrically controlled
The present invention relates to a chuck for mounting a workpiece, the chuck comprising: a chuck body; a base jaw installed on the chuck body; and a first reinforcing part positioned along the outer circumferential surface of the chuck body, wherein the chuck body is made of at least any one of materials selected from the group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy and a carbon composite fiber, and wherein the first reinforcing portion, which is positioned along a predetermined region of the outer circumferential surface of the side of the chuck body, supports the outer shape of the chuck body, thereby preventing the outer shape of the chuck body from being deformed.
The present invention relates to a chuck for mounting a workpiece comprising: a chuck body; a base jaw installed on the chuck body; and a reinforcing part positioned in a certain area on the outer surface of the base jaw, wherein the base jaw is formed of at least one material selected from a group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, reinforced plastic and a carbon composite fiber. It is possible to form a chuck having light weight by forming a base jaw of at least one material selected from a group consisting of an aluminum alloy, a titanium alloy, a magnesium alloy, reinforced plastic and a carbon composite fiber, which have a specific gravity smaller than that of alloy steel and carbon steel for machine structural use.
A chuck for mounting workpiece is disclosed. A chuck for mounting workpiece includes a chuck body; and a base jaw mounted on the chuck body. The chuck body includes an aluminum alloy. The chuck body includes an aluminum alloy having specific gravity smaller than that of alloy steel for machining structural use or carbon steel for machine structure use. Thus, the chuck can be light weight.
The present invention relates to a chuck for mounting a workpiece, comprising: a chuck body; and a base jaw provided on the chuck body, wherein the chuck body relates to the chuck for mounting the workpiece composed of an aluminum alloy material, and the lightweight chuck can be formed by composing the chuck body out of the aluminum alloy material having a lower specific gravity than alloy steel and carbon steel for a mechanical structure.
B23B 31/16 - Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
B23B 25/06 - Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work
