Abstract: A machine tool is equipped with a rotary table, and a clamp mechanism which clamps the rotary table in a manner so that the rotary table does not rotate. A clamping operation by the clamp mechanism is started after a standby time has elapsed from completion of indexing of the rotary table. The machine tool further includes a positional deviation calculating unit adapted to calculate a positional deviation of the rotary table when the clamping operation by the clamp mechanism is completed, and a standby time changing unit adapted to shorten the standby time in the case that an absolute value of the positional deviation is less than a threshold value, and to lengthen the standby time in the case that the absolute value of the positional deviation is greater than the threshold value.

Abstract: To provide a rotary table device that can prevent the occurrence of malfunction before it happens.

Abstract: A rotating axis supporting device of the present invention includes: a housing; a rotating axis rotatably pivoted to the housing; a case for fixing the housing; and an adjustment mechanism adjusting a position of the rotating axis by causing an attachment surface of the housing attached to the case to be perpendicular to an axial direction of the rotating axis, attaching the housing to move relative to the case in parallel to the attachment surface, and moving the housing and the case relative to each other in parallel to the attachment surface.

Abstract: A rotary table assembly is provided with a rotary table with a workpiece mounting table on one end of a rotating shaft and a cover covering the rotary table. A seal member is disposed between the cover and the workpiece mounting table, thereby preventing foreign matter, such as chips, from adhering to the rotary table.

Abstract: To provide a rotary table device that can prevent the occurrence of malfunction before it happens.

Abstract: A clamping mechanism of rotation table device includes a shaft fixing a workpiece to an end portion thereof, a brake disk fixed to the shaft, and a clamping mechanism clamping or unclamping the brake disk by driving a piston. The clamping mechanism includes a plate spring fixed to a rear plate fixed to a casing and a piston and urging the piston in a clamping direction at all times by an elastic deformation restoring force and the plate spring is fixed to the rear plate or the piston through an annular plate.

Abstract: A machine tool is equipped with a rotary table, and a clamp mechanism which clamps the rotary table in a manner so that the rotary table does not rotate. A clamping operation by the clamp mechanism is started after a standby time has elapsed from completion of indexing of the rotary table. The machine tool further includes a positional deviation calculating unit adapted to calculate a positional deviation of the rotary table when the clamping operation by the clamp mechanism is completed, and a standby time changing unit adapted to shorten the standby time in the case that an absolute value of the positional deviation is less than a threshold value, and to lengthen the standby time in the case that the absolute value of the positional deviation is greater than the threshold value.

Abstract: A rotation table that includes therein a rotation axis, a work placement table connected to one end of the rotation axis, a clamping device configured to hold the work placement table at a stop position, and a switching valve configured to switch the clamping device. The rotation table includes a member, to connect the clamping device and the switching valve to each other, having a pressure fluid supply flow passageway formed therein, so that the clamping device and a flow passageway of the switching valve communicate with each other.

Abstract: A clamping mechanism of rotation table device includes a shaft fixing a workpiece to an end portion thereof, a brake disk fixed to the shaft, and a clamping mechanism clamping or unclamping the brake disk by driving a piston. The clamping mechanism includes a plate spring fixed to a rear plate fixed to a casing and a piston and urging the piston in a clamping direction at all times by an elastic deformation restoring force and the plate spring is fixed to the rear plate or the piston through an annular plate.

Abstract: A rotating axis supporting device of the present invention includes: a housing; a rotating axis rotatably pivoted to the housing; a case for fixing the housing; and an adjustment mechanism adjusting a position of the rotating axis by causing an attachment surface of the housing attached to the case to be perpendicular to an axial direction of the rotating axis, attaching the housing to move relative to the case in parallel to the attachment surface, and moving the housing and the case relative to each other in parallel to the attachment surface.

Abstract: A machine tool includes a clamping mechanism for clamping/unclamping rotation of a rotary table. A load is measured when an unclamping command is output and then the rotary table is rotated after a set time set in the timer passes, and the set time of the timer is changed in response to a magnitude of the measured load. In this way, it is possible to prevent the clamping mechanism from being damaged due to a subsequent command given before unclamping ends, and extend a life span of a component.

Abstract: A rotary table assembly is provided with a rotary table with a workpiece mounting table on one end of a rotating shaft and a cover covering the rotary table. A seal member is disposed between the cover and the workpiece mounting table, thereby preventing foreign matter, such as chips, from adhering to the rotary table.

Abstract: A machine tool includes a clamping mechanism for clamping/unclamping rotation of a rotary table. A load is measured when an unclamping command is output and then the rotary table is rotated after a set time set in the timer passes, and the set time of the timer is changed in response to a magnitude of the measured load. In this way, it is possible to prevent the clamping mechanism from being damaged due to a subsequent command given before unclamping ends, and extend a life span of a component.

Abstract: A rotation instruction is transmitted to a motor in a state where a workpiece placement table connected to a rotation shaft of the motor is clamped by a clamp mechanism provided in a rotation table, and a clamp torque is measured based on motor torque information in accordance with the rotation instruction and a change in rotation shaft state (a rotation position, a rotation speed, and the like).

Abstract: A rotation table that includes therein a rotation axis, a work placement table connected to one end of the rotation axis, a clamping device configured to hold the work placement table at a stop position, and a switching valve configured to switch the clamping device. The rotation table includes a member, to connect the clamping device and the switching valve to each other, having a pressure fluid supply flow passageway formed therein, so that the clamping device and a flow passageway of the switching valve communicate with each other.

Abstract: A rotation instruction is transmitted to a motor in a state where a workpiece placement table connected to a rotation shaft of the motor is clamped by a clamp mechanism provided in a rotation table, and a clamp torque is measured based on motor torque information in accordance with the rotation instruction and a change in rotation shaft state (a rotation position, a rotation speed, and the like).

Abstract: A calibration method for calibrating a color image forming apparatus includes detecting the color of a patch formed on a recording medium by the color image forming apparatus using a color sensor, converting a detected color signal in a first color specification system into a color signal in a second color specification system, and adjusting at least one of the image forming conditions for the color image forming apparatus, based on the color signal converted in the conversion step, where the conversion conditions in the color signal conversion are different depending on the attributes of the patch.

Abstract: A main body of a machine tool is covered with a cover. A ceiling portion of the cover that is situated over a spindle motor is provided with an opening portion. The cover is provided with hanging portions that hang down from the opening portion with a predetermined clearance from side surfaces of the spindle motor other than the rear surface. Air that is mixed with a misty cutting fluid in a space inside the cover is sucked in through a suction pipe by a mist collector. The outside air flows into the space inside the cover through the clearance. The outside air that passes through the clearance is driven to flow through vents by a built-in cooling fan of the spindle motor, thereby cooling the motor, and is then discharged to the outside. In consequence, the temperature in the space inside the cover can never be increased by heating of the spindle motor.

Abstract: A calibration method for calibrating a color image forming apparatus includes detecting the color of a patch formed on a recording medium by the color image forming apparatus using a color sensor, converting a detected color signal in a first color specification system into a color signal in a second color specification system, and adjusting at least one of the image forming conditions for the color image forming apparatus, based on the color signal converted in the conversion step, where the conversion conditions in the color signal conversion are different depending on the attributes of the patch.

Abstract: Patches of black and a mixture of color coloring materials are formed on a recording medium, and the chromaticities of the patches are detected (S11). Black tonality data serving as reference lightnesses corresponding to respective tonality data are acquired from pieces of lightness information contained in the detected chromaticities corresponding to the respective tonalities of the black patches. Pieces of black lightness information are corrected on the basis of the acquired black tonality data and the detection results of the black patches. Chromaticities corresponding to the black tonality data are defined as target chromaticities, and the mixture rates of the color coloring materials are corrected on the basis of the target chromaticities and the chromaticities obtained by detecting the patches using the color coloring materials.