A fixed temperature liquid supply apparatus for supplying liquid adjusted in temperature to a processing apparatus including a processing unit includes a tank that accommodates the liquid, a thermometer that measures the temperature of the liquid accommodated in the tank, and a compressed gas supply pipe one end of which is connected to a compressed gas source reserving a compressed gas, the other end of which reaches the tank, and which supplies the compressed gas from the compressed gas source to the tank. The liquid accommodated in the tank is cooled by bubbles of the compressed gas, and the cooled liquid is supplied to the processing apparatus.

The present disclosure relates to an apparatus for cooling a ram spindle and compensating for a load and a machine tool including the same, in which a cooling unit cools a friction part between a ram spindle and a saddle when the ram spindle, which is transferred by means of the box guideway, is thermally deformed, and a hydraulic pressure closed circuit automatically compensates for a load applied to a plurality of gibs, which is provided inside the saddle and installed between the saddle and the ram spindle, except for a reference surface with which the ram spindle is in close contact, so as to correspond to the reference surface in a horizontal direction or a vertical direction in case that a load applied to the gib is changed by thermal deformation of the ram spindle even though the cooling unit is used, such that the surface pressure applied to the gib is automatically and constantly maintained, which makes it possible to improve machining precision of the machine tool, reduce machining costs by preventing a waste of resources, improve productivity by increasing a non-machining time, and improve stability and reliability of the machine tool.

A machining system capable of preventing mist from leaking out from an enclosure to the outside. The machining system includes a first enclosure including an opening and configured to define a first space in which a workpiece is processed, a second enclosure arranged adjacent to the first enclosure and configured to define a second space communicating with the first space through the opening, wherein a robot which can advance to and retreat from the first space through the opening is installed in the second space, and a pressure adjustment device configured to increase a pressure in the second space higher than a pressure in the first space.

The present invention relates to a cooling system comprising a spray unit for spraying a coolant. The present invention further relates to a machining device which comprises a cooling system of this type. The spray unit comprises a flow guide which is coupled on one side to a chamber and is coupled on the other side to one or more channels, where the chamber, the flow guide and the plurality of channels form a closed system for spraying from the channels pressurized coolant fed to the chamber, where the flow guide, the plurality of elongated channels and the chamber are manufactured as an integral part.

The invention is directed to a friction stir welding device which can realize appropriate friction stir welding while preventing a welding tool from being worn out and damaged. Therefore, the friction stir welding device is provided with a welding tool which rotates while abutting on a member to be welded to cause a plastic flow phenomenon in the member to be welded, a tool holder which grasps the welding tool and rotates together with the welding tool, supply paths which are formed in the tool holder and supply a refrigerant to the welding tool.

The invention is directed to a friction stir welding device which can realize appropriate friction stir welding while preventing a welding tool from being worn out and damaged. Therefore, the friction stir welding device is provided with a welding tool which rotates while abutting on a member to be welded to cause a plastic flow phenomenon in the member to be welded, a tool holder which grasps the welding tool and rotates together with the welding tool, supply paths which are formed in the tool holder and supply a refrigerant to the welding tool.

A cutting fluid supplying device for a machine tool includes a machine tool having a structure body including a bed, a column disposed on the bed, and a spindle head disposed to the column and at least one of the ejection ports for ejecting a cutting fluid. The cutting fluid supplying device for a machine tool further includes a storage tank for storing the cutting fluid to be supplied to the machine tool, at least one of the cutting fluid flow passages for connecting the storage tank and the at least one of the ejection ports, and at least one of the pumps for applying pressure to the cutting fluid to supply the cutting fluid stored in the storage tank to the at least one of the cutting fluid flow passages. The at least one of the cutting fluid flow passages is disposed to penetrate through or disposed on an outer surface of the structure body so as to allow heat exchange between the cutting fluid and the structure body.

A fluid supply apparatus according to an embodiment of the invention includes a housing and an internal structure which is housed in the hosing. The internal structure includes a shaft portion and a plurality of protrusions protruding from the outer circumferential surface of the shaft portion. A plurality of flow paths are formed between the plurality of protrusions, and a groove having a predetermined depth from the outer circumferential surface of the shaft portion is formed in each of at least a part of the plurality of flow paths.

In a precision machine tool wherein a spindle head that is movable in the up and down direction is disposed on a column disposed on a bed and a water storage space for storing temperature-regulated cooling water is formed inside the column, the column has, in a lower part thereof, intake ports through which cooling water is led into the water storage space, the column has, in an upper part thereof, and an air vent hole through which air in the column is discharged is formed at a position higher than the drain opening.

A machine tool including a first cooling unit, such as a fan, that cools at least one of a drive part that drives a component of the machine tool and an amplifier of the drive part, a second cooling unit, such as a Peltier element, that cools the at least one of the drive part and the amplifier, and a cooling control unit that controls the first cooling unit and the second cooling unit, wherein vibration caused by the second cooling unit is less than vibration caused by the first cooling unit, and the cooling control unit switches cooling of the at least one of the drive part and the amplifier, from cooling by the first cooling unit to cooling by the second cooling unit.