Patent application number | Description | Published |
20080247835 | MACHINE TOOL WITH MAIN BODY COVERED WITH COVER - 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. | 10-09-2008 |
20150014936 | MACHINE TOOL INCLUDING SEALING STRUCTURE IN ROTATION UNIT - A machine tool including a sealing structure in a rotation unit includes a gas supply amount control unit configured to control so that an air sealing gas supply amount in the case of a deceleration state of the rotation unit determined by a rotation state determination unit becomes larger than an air sealing gas supply amount in the case of a non-deceleration state determined by the rotation state determination unit. | 01-15-2015 |
20150072844 | TOOL EXCHANGER APPARATUS OF MACHINE TOOL - In a tool exchanger apparatus of a machine tool including a turret which turns around an axis inclining with respect to a vertical direction and which conveys tools, forces applied to tool gripping portions are calculated from a resultant force of a centrifugal force, gravity and an inertial force applied to each of the tools, using a weight and a position of each of the tools and a turning speed and a turning acceleration of the turret for each of turning phases when the turret turns, and the turning speed and the turning acceleration of the turret are determined for each of the turning phases. | 03-12-2015 |
20150072845 | TOOL CHANGER FOR MACHINE TOOL - In a tool changer, a turret can move toward and away from a spindle through a swinging movement about a swing shaft. Force applied to a turret mechanism unit at each phase in the swinging movement of the turret is calculated, and a swinging pattern of the turret is determined in accordance with the result of the calculation. | 03-12-2015 |
20150087487 | TOOL CHANGER EQUIPPED WITH COVERS - A tool changer is equipped with a turret having plural grips for use to grip tools as well as with a front cover and rear cover adapted to cover a front face and rear face of the turret. Furthermore, a protrusion is installed on the rear cover in a neighborhood of a gap between the front cover and the rear cover, being configured to block intrusion of chips or cutting fluid into the gap between the front cover and the rear cover from a top face of the rear cover. | 03-26-2015 |
20150093209 | ATTACHMENT STRUCTURE FOR MAIN SPINDLE AND TOOL HOLDER OF MACHINE TOOL - There is provided an attachment structure for a main spindle and a tool holder of a machine tool. The tool holder is attached to the main spindle by a tapered shank portion of the tool holder being inserted into a tapered hole formed in the main spindle of the machine tool. At least one circumferential groove is formed in at least one of the tapered hole and an inner wall of the main spindle. | 04-02-2015 |
20150111710 | TOOL CHANGER PROVIDED WITH COVERS - In a tool changer configured so that a turret is turned to index a desired tool to be changed, the front and rear surfaces of the turret are covered individually by covers. These covers are each formed in the shape of a truncated cone. Chips and a cutting fluid dropped onto an upper part of the cover that covers the rear surface of the turret flow away from a gap between the covers along a slope of the cover concerned, so that they can be prevented from getting into the turret through the gap. | 04-23-2015 |
20150186556 | TOOL GRAVITY CENTER POSITION ESTIMATION DEVICE AND MACHINE TOOL - A value of shape data is calculated from moment of inertia and weight data of a tool, a relational expression between shape data and tool moment of inertia in a predetermined tool shape model, and a relational expression between the shape data and tool weight in the tool shape model to estimate a shape of the tool, and a gravity center position of the tool is calculated based on the estimated tool shape. | 07-02-2015 |