Abstract: Discussed is a display apparatus which facilitates to minimize a thickness by innovatively removing a case and some portions of a set cover, which have been regarded as indispensible structures for the display apparatus, and simultaneously facilitates to realize a good sense of beauty in the display apparatus by a novel design, wherein the display apparatus comprises a set cover which has a space prepared by a sidewall; a display panel which includes lower and upper substrates bonded to each other; and a guide frame which supports the display panel, and seals a gap between a sidewall of the set cover and a lateral side of the display panel, wherein the guide frame is provided in the set cover.

Abstract: A cutting tool includes one or more cutting portions. Each of the cutting portions has a cutting insert and an insert pocket for mounting the cutting insert. The insert pocket has a top surface with one or more projecting portions with a shape of serration, and a bottom supporting surface. The cutting insert has a top surface mating with said projecting portions of the insert pocket, and a bottom surface mating with the bottom supporting surface of the insert pocket. The top surface of the cutting insert has one or more outwardly sloped surfaces mating with the projecting portions of the insert pocket, and one or more inwardly sloped surfaces positioned off the projecting portions.

Abstract: A cutting insert mountable in an insert pocket of a milling cutter and capable of effectively absorbing a radially outward force during high speed machining and high ramp machining. The cutting insert has a top surface, a bottom surface, peripheral surfaces extending between the top and bottom surfaces, a mounting hole extending through the top surface and the bottom surface, a protrusion portion protruding from the bottom surface, and a pair of lower inclined abutment surfaces formed at opposite edges of the bottom surface. The lower inclined abutment surfaces are inclined in opposite directions toward a pair of opposing peripheral surfaces, outwardly and upwardly relative to the protrusion portion. The protrusion portion extends across the mounting hole and has a lateral surface facing radially outwardly of the milling cutter. The lateral surface selectively contacts or does not contact the insert pocket depending on a revolution speed of the milling cutter.

Abstract: A cutting tool assembly has a cutter body, a clamp pin, a cutting insert and a set screw. The clamp pin is inserted to the cutter body to secure the cutting insert to an insert pocket. The set screw is fastened to a threaded hole of the cutter body to press the clamp pin toward the insert pocket. A side surface of the cutting insert contacts a side wall of the insert pocket at a first contact portion. A head of the clamp pin contact an inner peripheral surface of a bore of the cutting insert at a second contact portion. The first and second contact portions are located such that a moment acts on the cutting insert toward the base wall of the insert pocket around the first contact portion.

Abstract: A hexahedral insert has top and bottom faces and two pairs of opposing side faces with main cutting edges formed on the borders of the top and bottom faces to the side faces and a screw hole passing through each central portion of the top and bottom faces. The top and bottom faces are flat planes parallel to each other; each of the side faces consecutively from top to bottom includes an upper land portion, an upper inwardly-inclined portion, a flat support surface, a lower inwardly-inclined portion, and a lower land portion. Each of two adjacent side faces has a corner surface therebetween which forms corner edges on the borders to the top and bottom faces. The cutting insert enhances the cutting power by reducing cutting resistance and prevents scratches on a machined surface.

Abstract: A cutting tool includes a cutting insert and a tool holder. The tool holder includes: a base for supporting a bottom surface of the cutting insert; a clamping arm for pressing a top surface of the cutting insert; an insert receiving space formed between the bottom surface of the clamping arm and the base; and a supporting surface which defines an end of the insert receiving space and supports an end of the cutting insert. The cutting insert includes: a first pressing region on the front portion of the top surface which is oriented in a vertically upward direction; and a second pressing region on the rear portion of the top surface which is oriented at an angle in the front direction.

Abstract: The present invention is directed to a cutting tool, comprising: at least one cutting insert; a tool body including a pocket portion to which the cutting insert is mounted; a means for fixing the cutting insert to the pocket portion of the tool body; and a screw for finely adjusting the position of the cutting insert fixed to the pocket portion of the tool body. The screw has a head portion, a threaded portion and a portion for connecting the head portion to the threaded portion. The pocket portion has a bottom surface with a screw hole formed thereon into which the threaded portion is fastened. It also has a side wall comprising a surface for closely contacting the head portion of the screw. The head portion of the screw closely contacts and resiliently pressurizes the close contact surface of the pocket portion when the threaded portion is fastened into the screw hole.

Abstract: A cutting insert having a plurality of corner cutting edges has an upper face, a lower face, two longitudinal side faces and two transversal side faces connecting the upper face and the lower face. A through hole passes through central parts of the upper face and the lower face. The longitudinal side faces are opposite to each other and normal to both upper and lower faces, as are the transversal side faces. The upper face and the lower face are each provided with two chip discharge grooves, each chip discharge groove extending along a corresponding one of the transversal side faces, the two chip discharge grooves being inclined oppositely in the transverse direction so that the upper face and the lower face are each provided with two corner cutting edges at diagonally opposite corners. The longitudinal length of the insert is longer than the transversal length of the insert. The cutting insert can be mounted stably to a small-diametered cutter with a sufficient mounting surface.

Abstract: A cutting insert has top and bottom surfaces in the thicknesswise direction, and front and rear surfaces in the widthwise direction. First and second cutting edges are formed in the lengthwise direction at intersection portions where the top surface intersects with the front and rear surfaces. Third and fourth cutting edges are formed in the lengthwise direction at intersection portions where the bottom surface intersects with the front and rear surfaces. The first to fourth cutting edges are divided by a plurality of recesses. The plurality of recesses are symmetric with respect to the lengthwise centerline (A), which runs between the first and third cutting edges on the front surface and are asymmetric with respect to the thicknesswise centerline (B) perpendicular to the lengthwise centerline (A).

Abstract: The threaded engagement device includes a female thread portion and a male thread portion, which are engaged to each other through a plurality of threads formed along the axis direction. Each thread of the female thread portion and the male thread portion of the threaded engagement device includes a crest, a root, a stab flank and a load flank. The root of the female thread portion has a straight portion extending along the axis direction and a concave rounded portion. The root of the male thread portion has a concave rounded portion, wherein the radius of curvature of the rounded portion formed in the root of the male thread portion is larger than the radius of curvature of the rounded portion formed in the root of the female thread portion.

Abstract: A cutting insert has a top surface and a bottom surface having a parallelogram shape, and four side surfaces connecting the top and bottom surfaces. One or more primary cutting edges are formed at intersections between the top and bottom surfaces and two opposing side surfaces. Secondary cutting edges are formed at intersections between the top and bottom surfaces and two other opposing side surfaces. The primary cutting edge forms a first angle with respect to a median plane parallel to the top and bottom surfaces. The secondary cutting edge forms a second angle with respect to the median plane. The top and bottom surfaces have a mounting surface and a rack surface, wherein the rack surface extends inwardly from the cutting edge toward the median plane. The top and bottom surfaces of the cutting insert have mirror symmetry with respect to the median plane.

Abstract: A cutting insert has a top surface, a bottom surface, a plurality of side surfaces that connect the top and bottom surfaces. The side surfaces form an obtuse angle with the bottom surface as well as an acute angle with the top surface. The side surfaces include a first side surface and a second side surface, which form an obtuse angle with each other when seen from the above. A main cutting edge is formed at an intersection between the first side surface and the top surface. An inclined cutting edge, which is only for ramp milling, and a minor cutting edge are formed at an intersection between the second side surface and the top surface. An obtuse angle, which the second side surface forms with the bottom surface, is greater than that which the first side surface forms with the bottom surface.

Abstract: A roll coupled to a separately manufactured axle rotates together with the axle in order to perform a rolling process. The roll includes an inner cylindrical surface, an outer cylindrical surface and both side faces, and at least one key way provided on at least one of the side faces is arranged adjacent to the inner cylindrical surface rather than said outer cylindrical surface, The key way is in a concave curved shape and is a portion of a spherical surface or of an ellipsoidal surface.

Abstract: An internal groove insert includes a rectangular main body having a top surface, a lower surface, and first to fourth lateral surfaces; and first and second projections each projecting from the adjacent first and second lateral surfaces. The first projection has a first cutting edge at the side of the top surface of the main body, while the second projection has a second cutting edge at the side of the lower surface. The first and fourth lateral surfaces are inclined by an obtuse angle with respect to the top surface, while the second and third lateral surfaces are inclined by an acute angle with respect to the top surface. The central axis of the clamping hole is inclined to be parallel to the insert corner edge where the first and fourth lateral surfaces meet.

Abstract: A cutting tool for machining metallic materials has at least one cutting portion having a cartridge and a cartridge pocket for mounting cutting inserts to the cutting tool. The cartridge pocket has a top surface, a rear supporting surface and a bottom supporting surface. The top surface of the cartridge pocket has one or more serrated projecting portions. The cartridge has an insert pocket, a top surface, a first side surface and a bottom surface. The insert pocket of the cartridge receives a cutting insert. The top surface of the cartridge has one or more outwardly sloped surfaces and one or more inwardly sloped surfaces. The outwardly sloped surfaces mate with the serrated projecting portions. The inwardly sloped surfaces have a gap with respect to the projecting portions of the cartridge pocket.

Abstract: A cutting tool for machining large workpieces having relatively a large cutting amount and a cutting insert configured to be used with the cutting tool. The cutting tool includes a cutting insert and a wedge for clamping the cutting insert. The cutting insert has a polygonal top surface, which comprises a recessed portion having a plurality of inclined abutment surfaces which are inclined toward the center of the top surface. The outline of said recessed portion is twisted at a predetermined angle with respect to the outline of the top surface. The wedge includes a projecting portion that contacts the inclined abutment surface and pushes the cutting insert so that two side surfaces of the cutting insert can be supported by a radial inner side surface and a lateral supporting surface of an insert seat.