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| Number | Title | Issue Date |
| 8014903 | Method for suppressing vibration and device therefor The vibration suppressing device includes vibration sensors, a FFT calculating unit, a store device, a calculating unit, and a NC device. The vibration sensors detect a time-domain vibrational acceleration of a rotary shaft during rotating. The FFT calculating unit ... | 09/06/2011 |
| 8005574 | Vibration suppressing method and device A stable rotation speed is acquired by finely changing a rotation speed of a rotary shaft 3 based on an expected stable rotation speed, and calculating an amount of change of a k′ number, and the like. Therefore, a more accurate rotation speed can be acquir... | 08/23/2011 |
| 7997385 | Machine tool The present invention is to provide a machine tool in which appropriate warm-up operation can be performed. Unnecessary warm-up operation before machining is not carried out and damage of bearings caused by the warm-up operation is prevented. A controlling unit stor... | 08/16/2011 |
| 7913596 | Turret tool rest and machine tool A turret tool rest is provided with a tool rest body, which is rotatable around the vertical axis, on a lower saddle. A turret is provided on a side surface of the tool rest body, and an anti-vibration mechanism is provided on a side surface that is adjacent to the ... | 03/29/2011 |
| 7909154 | Pallet exchanger A pallet exchanger capable of providing a sufficient operation space on an operator's access side, for example, in front of a machining space, without increasing the size of the exchanger is provided. An arm is formed in a chevron shape in a plane view including two... | 03/22/2011 |
| 7862284 | Pallet transfer system A pallet transfer system capable of smoothly transferring a pallet between a machine tool and a pallet conveying device is provided. The pallet transfer system includes an intermediated station to temporally place a pallet between a front ward position of a pallet s... | 01/04/2011 |
| 7824105 | Bearing and bearing apparatus In an outer ring, a plurality of lubrication oil flow paths which penetrates from an outer circumference surface of the outer ring to an inner circumference surface (in particular, raceway groove) are provided. Opening positions of the each lubrication oil flow path... | 11/02/2010 |
| 7798293 | Table clamp device A clamp device is provided that can prevent a table from being tilted at the time of clamping, can suppress a displacement in an axial direction at the time of clamping to a minimum, and also can be suitably used for a table unit with its table swiveling at a high s... | 09/21/2010 |
| 7795834 | Servo motor controller A controller includes a rotating direction detecting unit 34 to detect the rotating direction of a servo motor 6, a reversing distance computing unit 31 to compute a rotating angle of the servo motor 6, a rotation resistance computing uni... | 09/14/2010 |
| 7778725 | Method for estimating thermal displacement in machine tool After a thermal displacement correcting program has started, a temperature is measured with a temperature sensor in S1, then when a rotational speed of a spindle is changed during the measurement (S2), a counter starts (S3). Then in S4, f... | 08/17/2010 |
| 7766541 | Method for detecting abnormality of temperature sensor in machine tool The invention relates to a method for detecting an abnormality of a temperature sensor. A plurality of temperature sensors are preliminarily grouped for each of predetermined attachment areas of a machine tool, and after a temperature of each part is measured in S | 08/03/2010 |
| 7706922 | Method for controlling parallel kinematic mechanism machine and control apparatus therefor First of all, in a first step S1, each actuator command value for position command value and posture command value of an end-effector is determined. Next, in a second step S2, rotational resistance values of a first and a second universal joints are ob... | 04/27/2010 |
| 7676338 | Method for detecting abnormality of temperature sensor in machine tool The invention enables an abnormality of a temperature sensor to be simply detected. In S1, a temperature measurement is performed with each temperature sensor, and measured signals are digitalized to obtain a temperature value. Then, in S2, a detection... | 03/09/2010 |
| 7647855 | Electrically-operated chuck opening-closing device An electrically-operated chuck opening-closing device includes a chuck that grasps workpiece, a conversion device with a control gear provided to the outer circumference, a drawbar that couples the conversion device and the chuck, a transmission gear provided to a m... | 01/19/2010 |
| 7621031 | Pallet exchanging device A pallet exchanging device is provided which can secure a sufficient working space and can cope with a multi-phase pallet exchanging system without increasing the size of the device. In a pallet exchanging device, a pallet stocker is constituted so that any pallet p... | 11/24/2009 |
| 7574324 | Abnormality diagnostic method and device thereof An abnormality diagnostic device selects a previously stored diagnostic measuring orbit (S110), and makes a machine to perform a specified operation for diagnosis so as to measure a driving power value of an actuator (S120). In S140, the abnorma... | 08/11/2009 |
| 7543307 | Interface method and device having interface for circuit comprising logical operation element An interface is defined using an interface definition language, some portion of which is common to an interface definition language directed to a software object and a means for defining a function name, an argument, and a return value for each function. A server in... | 06/02/2009 |
| 7520156 | Calibration method for a parallel kinematic mechanism machine Kinematic parameters of a parallel kinematic machine can be estimated with high precision considering thermal displacement and error of a measuring device, in addition to deformation error caused by self-weight of each component. A DBB device is used when end effect... | 04/21/2009 |
| 7506424 | Rotary tool-equipped tool rest A rotary tool-equipped tool rest is provided, including a movable member made to move frontwardly when a turret is clamped with respect to a non-swiveling housing after swiveling and indexing. Then, a phase determining pin provided in the turret is made to project a... | 03/24/2009 |
| 7503735 | Spindle structure A spindle structure in which a noise occurrence due to a tap hole and a screw is effectively prevented. A nut for adjusting a preload of a bearing is threadedly engaged with an outer circumference of a spindle. On an edge of the nut, a plurality of tap holes for bal... | 03/17/2009 |
| 7374378 | Dust prevention mechanism of spindle device A dust prevention mechanism of a spindle device that ensures prevention of cutting liquid etc. from entering an inner portion of the spindle device, which saves energy and reduces noise upon stop of rotation of a spindle is provided. In a dust prevention mechanism | 05/20/2008 |
| 7266903 | Method for correcting thermal displacement in a machine tool A thermal displacement correction method is provided, including the steps of presetting coordinate data for a fixed position of a workpiece on a table, finding an amount of displacement of the fixed position of the workpiece at a current cutting edge position based ... | 09/11/2007 |
| 7229395 | Cover structure of a machine tool A cover structure of a machine tool with a simple structure which improves work efficiency by minimizing an opening portion. An opening portion is defined in a reverse concave shape at one lateral side of a cover. The opening portion includes two tool passing portio... | 06/12/2007 |
| 6973856 | Screw tightening apparatus In order to provide a space-saving inexpensive screw tightening apparatus by forming the same apparatus as a whole to a rational simple construction, a screw tightening apparatus M is provided with a robot 5 for retaining a nut runner 1, which is adapt... | 12/13/2005 |
| 6960858 | Motor using permanent magnet A motor which uses a permanent magnet is provided in which output thrust is improved by increasing a magnetic saturation limit and preventing reduction in magnetic flux and generation of heat is reduced by inhibiting generation of an eddy current in a magnetic pole.... | 11/01/2005 |
| 6861816 | Positional control of a controlled object during movement initiation In a positional control device for controlling a position of a controlled object using a motor, when generating a torque command value τc which serves as the command value for the servo motor of the controlled object system (112), a friction compensation val... | 03/01/2005 |
| 6777843 | Resolver integrated type motor A resolver-integrated motor has a radial irregular shape which is formed at an end on a non-load side of its motor shaft. This radial irregular shape is used as a resolver rotor. The radial irregular shape is formed by grinding or turning the motor shaft made of a c... | 08/17/2004 |
| 5392217 | Apparatus and method for controlling acceleration and deceleration for numerically controlled machine An acceleration and deceleration controlling apparatus in which a positional moving amount supplied from a host is converted into an accumulated value of absolute positions by two serially connected accumulators to be output to a first stage of a buffer r... | 02/21/1995 |
