Korea Institute of Machinery & Materials

Gottfried Wilhelm Leibniz Universitat Hannover

Jong-Kweon Park

Seung Kook Ro

Byung-Sub Kim

Sung Cheul Lee

Kornel F Ehmann

James Zhu

Shiv G Kapoor

Seung-Kook Ro

Gyung Ho Khim

Sung-Kwon Jang

Jaegu Kim

Berend Denkena

Byung-in Kim

Hyeon-Hwa Lee

Kyung Han Kim

Soo Chang Choi

Sung Kwon Jang

Peidong Han

Oliver Bertram

Gyung-Ho Khim

Dominik Dahlmann

Sung-Cheul Lee

Lee Sung-Cheul

A cutting head operated by a centrifugal force according to an embodiment of the present invention includes: an external housing that is rotatable; an internal housing installed within the external housing so as to be able to advance and retreat in a diameter direction, advanced toward a cut surface of a workpiece positioned outside the external housing by a centrifugal force according to rotation of the external housing, and retreated in a direction that becomes distant from the cut surface by an elastic member while the centrifugal force disappears; and a cutting tool unit provided in the internal housing and processing a groove in the cut surface while being advanced and retreated by a micro advance and retreat member.

Cutting head operated by centrifugal force and cutting apparatus including the same

A hybrid cutting apparatus and a method of cutting a groove are provided. The hybrid cutting apparatus includes: a main body that is connected with a rotation shaft of a machine tool; a grooving tool that is coupled to one side of the main body and for forming a groove at an interior circumference of a workpiece; and a tool position control means that controls a position of the grooving tool to correspond to a cutting surface position of the workpiece.

Hybrid cutting apparatus and method of cutting groove using the same

An apparatus for manufacturing a blade is provided. The apparatus for manufacturing a blade includes: an arm module including a pressing unit pivoting around a first shaft; a molding module including a molding die pressed by the pressing unit and molding bulk metallic glass (BMG) to a blade; and a drawing module pulling an end portion of the BMG exposed to the outside of the molding die to form an edge of the blade, wherein the drawing module includes a pair of drawing tools pulling one end portion of the BMG in two directions.

Apparatus and method for manufacturing blade

According to an exemplary embodiment of the present invention, a trocar is provided. The trocar includes: a sharp end; at least three concave cutting edges extended from the sharp end; and at least three concave cutting surfaces forming the sharp end and the at least three cutting edges.

Trocar, method for manufacturing the same, and method for continuously manufacturing the same

An apparatus for processing the surface of a workpiece includes: a first rotating body connected to a first rotating shaft and including a first protruding portion connected to a part of the outer circumference thereof; a second rotating body connected to a second rotating shaft and including a second protruding portion connected to a part of the outer circumference thereof; and a third rotating body connected to a third rotating shaft and including a third protruding portion connected to a part of the outer circumference thereof, wherein the first to third rotating shafts are in the same plane, a first angle between the first and second rotating shafts, a second angle between the first and third rotating shafts, and a third angle between the second and third rotating shafts are identical, outer circumferences of the first to third rotating shafts adjacent to one another form a pathway through which a workpiece can pass, and the size of the pathway is adjusted by moving the first rotating body.

Apparatus for processing surface of workpiece

Disclosed is a convergence machining apparatus based on turning in which a rotational axis of a work piece fixed by a headstock and a tailstock and a center of a width of a slide surface of a bed on which a reciprocal carriage installed with a tool is transferred while being supported are positioned at the same virtual plane, thereby preventing an offset error according to a relative displacement between the work piece and the tool during processing.

Convergence machining apparatus based on turning

Disclosed is a convergence machining apparatus based on turning in which a rotation center of a work piece to a headstock and a footstock and a slide surface of first and second beds mounted with a reciprocal carriage, the headstock, and the footstock are positioned on the same virtual line when viewed from a direction parallel with a rotation axis of the work piece, thereby preventing an offset error in processing due to a relative displacement between the work piece and a tool installed at the reciprocal carriage.

According to an exemplary embodiment of the present invention, a variable machine tool capable of multi-axis machining includes: a base frame; a first rotating frame rotating on the base frame and comprising a first sliding member sliding along a circumference while being contact-supported through an interior diameter; a second rotating frame cross-disposed inside the first rotating frame to rotate in a direction crossing the first rotating frame, and comprising a second sliding member sliding along a circumference while being contact-supported through an interior diameter; and a spindle of which position and posture displacement is adjusted when the first sliding member and the second sliding member slide by interworking with rotation of the first rotating frame and the second rotating frame, the spindle being installed while passing through the first sliding member and the second sliding member.

Variable machine tool capable of multi-axis machining

Disclosed is an aerostatic air bearing. The disclosed aerostatic air bearing includes: an aerostatic nut, said aerostatic nut including a housing having an air inlet disposed therein, a helical plenum chamber disposed in said housing, said helical plenum chamber being fluidly connected to the air inlet and fluidly interconnecting a plurality of openings, said openings being disposed in a helical pattern, and a plurality of porous media, each of said porous media being disposed in one of the plurality of openings respectively; and a lead screw coupled to said aerostatic nut, said lead screw including a threaded surface separated from each of the plurality of porous media.

Aerostatic air bearing, assembling method thereof, and aerostatic lead screw actuator using the same

Disclosed are an actively compensated stage including: a guide support having first and second guide surfaces perpendicular to each other; a table having first and second sides opposite the first and second guide surfaces and having air bearings on the first and second sides; a driving linear motor moving the table straight in an x-axial direction; and a plurality of magnetic actuators applying a magnetic preload between the guide support and the table and changing a magnetic force between the guide support and the table to compensate for 5-DOF motion errors generated in the table.

Actively compensated stage having 5-DOF motion error compensation and motion error compensating method thereof

A capsule type reconfigurable multifunctional machining apparatus is disclosed. A capsule type reconfigurable multifunctional machining apparatus includes a rotating frame in which a plurality of processing modules may be installed to face an object to be machined disposed in a capsule type body and whose machining position and pose are controlled by rotation, a top frame for rotatably supporting the rotating frame, a bottom frame that is combined with the top frame under the top frame to support the top frame and in which vibration proof members are installed in positions where the bottom frame contacts the top frame, and a stage unit fixedly inserted into the internal center of the top frame to settle the object to be machined so that the height of the settled object to be machined may be controlled and in which an X-Y stage or a rotary stage may be selectively mounted.

Capsule type reconfigurable multifunctional machining apparatus

Disclosed is a 3D reconfigurable machining system including a support frame spaced apart from the ground, a circular pivoting frame pivotably installed at the support frame, a slide member slidably installed on the circumferential portion of the pivoting frame, and a main spindle installed vertically at the slide member and being rotatable along the pivoting frame, so that a workpiece can be three-dimensionally machined with a considerably simple structure.

Three-dimensional reconfigurable machining system

A planar stage moving apparatus for a machine includes: first to fourth linear motors for applying, between a base, i.e. a fixed body and a table, i.e. a movable body, a movement force to the table, each linear motor including a stator core on which a coil is wound and which is fixed to the base and a mover core to which a permanent magnet is attached and which is fixed to the table; an air bearing unit provided between the base and the table to move the table under the influence of magnet fields when currents are applied to the coils of the linear motors; and a linear encoder installed on one side of the table to measure movement of the table.

Growing community of inventors

Daejeon, South Korea

Jong-Kweon Park