KOMATSU NTC LTD.
|KOMATSU NTC LTD. Patent applications|
|Patent application number||Title||Published|
|20140100094||TOOL MAGAZINE AND MACHINING CENTER - A tool magazine that can make a long tool reasonably coexist with other tools and a machining center with the tool magazine are provided. The tool magazine has a rotatable magazine main body and plural of tool holders installed on the magazine main body. Each of the tool holders moves to a tool exchange position sequentially. A part or all of the tool holders has a capability of changing between an exchange posture that holds the tool in parallel to a rotation shaft of the magazine main body and a transport posture that holds the tool along with a plane perpendicular to the rotation shaft of the magazine main body. The tool holder capable of changing postures takes the exchange posture when it locates in the tool exchange position and takes the transport posture when it leave the exchange position. The machining center has the above tool magazine.||04-10-2014|
|20130287511||CENTERING METHOD AND APPARATUS - A workpiece centering apparatus has a first work clamp, a second work clamp, and centering drills. The first work clamp is moved in an X-axis direction to make an actual workpiece central axis parallel to a preliminarily given target workpiece central axis, and the centering drills are moved in the X-axis direction to make the actual workpiece central axis with respect to the X-axis direction coincident with the target workpiece central axis with respect to the X-axis direction. The second work clamp is moved in the Y-axis direction to make the actual workpiece central axis parallel to the target workpiece central axis, and the centering drills are moved in the Y-axis direction to make the position of the actual workpiece central axis with respect to the Y-axis direction coincident with the target workpiece central axis with respect to the Y-axis direction.||10-31-2013|
|20130280993||SCATTERING PREVENTION STRUCTURE OF GRINDING MACHINE - This scattering prevention structure of a grinding machine has: a pair of supporting tables; an X axis saddle, which supports a grinding head such that the grinding head can freely move in the advancing/retracing direction with respect to a workpiece; a Z axis saddle, which supports the X axis saddle such that the X axis saddle can freely move in the rotating axis direction of the workpiece; and a grinding stone cover. The grinding stone cover is fixed to the Z axis saddle such that the grinding stone cover opens in a machining region, and the grinding stone head can freely move, with respect to the grinding stone cover, in the advancing/retracting direction with respect to the workpiece, by having the accordion cover therebetween. With this configuration, the size of the machining chamber is reduced, and shielding performance is improved.||10-24-2013|
|20130260655||GRINDING WHEEL - A grinding wheel includes: a disc member; and an annular grindstone member fitted on an outer peripheral surface of the disc member, wherein the disc member has a fluid-supply hole formed therethrough from a first side surface to a second side surface thereof, wherein the fluid-supply hole has an outlet opening through an outer peripheral portion of the first side surface; and an inlet opening which is open through the second side surface and which is disposed at an inner position of the outlet opening in a radial direction of the disc member, and wherein the second side surface is formed with an outer peripheral wall which is disposed at an outer position of the inlet opening in a radial direction of the disc member and projects along an outer peripheral portion of the disc member.||10-03-2013|
|20130129439||HORIZONTAL MACHINE TOOL - Provided is a horizontal machine tool with a base frame including a base part and a saddle supporting part vertically standing on the base part; an X-axis saddle mounted on the back face of the saddle supporting part and capable of sliding in the left-right direction via an X-axis translation mechanism; a Y-axis saddle mounted on the X-axis saddle and capable of sliding in the up-down direction via a Y-axis translation mechanism; and a spindle device mounted on the Y-axis saddle and capable of sliding in the front-rear direction via a Z-axis translation mechanism. The horizontal machine tool is adapted such that a workpiece supporting member is installed on the base part in front of the saddle supporting part. This configuration can reduce the size and weight of the entire construction.||05-23-2013|
|20130045666||Grinding Machine - A grinding machine includes a pair of workpiece support devices (||02-21-2013|
|20120259452||CENTER HOLE MACHINING METHOD FOR SHAFT BLANK AND CENTER HOLE MACHINING APPARATUS - A center hole machining method includes first to fifth steps. The first step includes obtaining outer peripheral shape data of a plurality of portions of the shaft blank in an axial direction. The second step includes obtaining a center axis by comparing measured data of the portions of the shaft blank with design data. The third step includes calculating a minimum distance from the center axis to the outer periphery in each of the portions of the shaft blank. The fourth step includes shifting the center axis in a direction of making the minimum distance greater than the machining dimension and repeatedly executing the third step when the minimum distance is less than or equal to the machining dimension. The fifth step includes boring the center hole in an end surface of the shaft blank at a position arranged on a line extended from the center axis.||10-11-2012|
|20120020755||HORIZONTAL MACHINE TOOL - A horizontal machine tool (||01-26-2012|
|20110237159||Grinding Machine and Measuring Apparatus - A first grinding head is provided on a base frame via a first movable body and a first grinding base. The proximal portion of the tilt arm is tiltably fitted in the housing of the grinding head. A measuring device is rotatably coupled to a distal portion of the tilt arm. A gauge and a measuring pin are coupled to the lower end of the measuring device, and the gauge is engaged with a crankpin of a crankshaft. A tilt center of the tilt arm is arranged on the same axis as the rotation center of the first grindstone ISA. When the tilt arm is tilted, the position of the measuring device is changed, accordingly. However, since the relational relationship between the first grindstone ISA and the gauge is not changed, the position of the gauge is easily adjusted in accordance with the diameter of the crankpin. Accordingly, a grinding machine is provided that simplifies the movement path of the gauge of the measuring device, thereby allowing the outer diameter of the workpiece to be quickly measured.||09-29-2011|
|20100202848||MACHINE TOOL - A machine tool including a base frame, a workpiece table, a machining unit, and a connection portion is disclosed. The base frame has a machining area. The base frame includes two left and right side frames and a connection frame connecting the two side frames. The workpiece table is arranged on the base frame in the machining area. The machining unit is arranged on an upper portion of the base frame and includes a spindle device. A connection portion connects the machining unit and the base frame in a detachable manner.||08-12-2010|
Patent applications by KOMATSU NTC LTD.