Abstract: A machine tool cooling system and cooling method which allow cost reduction by reducing the number of control valves, and in which opening/closing control is simple are disclosed. The machine tool cooling system and cooling method include a hot oil tank storing hot oil, a cold oil tank storing cold oil, a first to third hot oil passages and a first to third cold oil passages, which supply the hot oil and the cold oil to a first to third heat generating portions, a hot oil return passage returning the hot oil to the hot oil tank, a first to third supply control valves interposed in the first to third cold oil passages, and a valve controller controlling opening/closing of the first to third supply control valves so that the cold oil is supplied to the first to third heat generating portions intermittently at different timings.

Abstract: There are provided a machine tool cooling system and cooling method which allow cost reduction by reducing the number of control valves, and in which opening/closing control is simple. The machine tool cooling system and cooling method include a hot oil tank 4 storing hot oil, a cold oil tank 5 storing cold oil, a first to third hot oil passages 9a to 9c and a first to third cold oil passages 10a to 10c, which supply the hot oil and the cold oil to a first to third heat generating portions 1 to 3, a hot oil return passage 11 returning the hot oil to the hot oil tank 4, a first to third supply control valves 16a to 16c interposed in the first to third cold oil passages 10a to 10c, and a valve controller 8 controlling opening/closing of the first to third supply control valves 16a to 16c so that the cold oil is supplied to the first to third heat generating portions 1 to 3 intermittently at different timings.

Abstract: An exterior cover for a machine tool is provided which permits a machine tool body to maintain its machining accuracy. The exterior cover comprises a cover frame placed on a floor where the machine tool is installed, an inner cover plate partly attached to an inner side of the cover frame, and an outer cover plate attached to an outer side of the cover frame. A thermal insulating material is provided between the inner cover plate and the outer cover plate, and bonded to the inner cover plate. When the exterior cover is assembled, the cover frame is brought into abutment against the machine tool body with the intervention of a positioning member. Thus, the exterior cover can easily be positioned with respect to the machine tool body.

Abstract: The present invention provides a machine tool which is adapted to discharge chips brought into the work area from the machining area outside the machine tool by a simpler operation. The machine tool (1) comprises a bed (51), a column (52), a spindle head (53), a table (54), a pallet base (63) and a pallet changer (11), wherein the spindle head (53) and the table (54) are movable relative to each other along three orthogonal axes. In the machine tool (1), a chip conveyor (10) having a transport path located below a machining area (A) and a work area (B) is provided for conveying chips. Thus, chips generated in the machining area (A) and chips brought into the work area (B) from the machining area (A) are collected on the chip conveyor (10), and conveyed and discharged outside the machine tool (1) by the chip conveyor (10).

Abstract: The present invention provides a machine tool which is adapted to discharge chips brought into the work area from the machining area outside the machine tool by a simpler operation. The machine tool (1) comprises a bed (51) , a column (52) , a spindle head (53) , a table (54), a pallet base (63) and a pallet changer (11), wherein the spindle head (53) and the table (54) are movable relative to each other along three orthogonal axes. In the machine tool (1), a chip conveyor (10) having a transport path located below a machining area (A) and a work area (B) is provided for conveying chips. Thus, chips generated in the machining area (A) and chips brought into the work area (B) from the machining area (A) are collected on the chip conveyor (10), and conveyed and discharged outside the machine tool (1) by the chip conveyor (10).