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.

The controller for a machine tool according to the present invention makes it possible to discharge both a coolant and an oil mist from a through hole provided in the tool equipped to a main axis of a machine tool, allows a processing program to instruct the discharge of either the coolant or the oil mist, and carries out such a control that a state where the above-described tool is detached from the main axis is maintained during a predetermined period of time at the time of replacing the tool, and at the same time, the oil mist is discharged from the above-described oil mist unit so as to remove the coolant from the above-described piping during the predetermined period of time.

A coolant distributor comprising a head having a plurality of ports, each of the ports being fluidly coupled to a flow control valve. A cap is demountably coupled to the head. The cap comprises at least one fixed nozzle fluidly coupled to at least one port. A controller is coupled to the flow control valve, wherein the controller is configured to actuate the flow control valve to pass a cooling fluid through the at least one fixed nozzle to direct the cooling fluid to at least one predetermined cutting region of a machine tool and work piece proximate the coolant distributor.

A numerical-control machine tool is provided and includes a load-bearing beam which extends horizontally, has two axial ends resting in sliding manner on two lateral shoulders that rise from a basement and extend horizontally side by side so as to define a longitudinal corridor orthogonal to the longitudinal axis of the beam; a spindle-holding carriage which is movable on the load-bearing beam parallel to the longitudinal axis of the beam; a spindle-holding shaft which is fixed to the spindle-holding carriage in a vertical position, and is movable on the spindle-holding carriage parallel to its longitudinal axis; a front wall and a rear wall that close the two ends of the longitudinal corridor; an upper cover which closes the longitudinal corridor at the top; and an ambient conditioning unit which is adapted to bring and maintain the temperature of the air present inside the machining chamber around a given target value.

A quill style drilling/milling end effector with high tool positioning accuracy, a pressure foot with fast response in force and displacement feedback, and with automatic mounting and dismounting, normality sensing, and through the tool coolant delivery.

A foreign-substance discharge mechanism includes: a lubricating-liquid groove provided on a sliding surface of a wedge member and configured to receive a lubricating liquid; and a foreign-substance collector provided to the lubricating-liquid groove and configured to collect foreign substances existing in the lubricating-liquid groove. A first end and a second end of the lubricating-liquid groove are spaced apart from each other in a relative movement direction of the wedge member and the table bed. Disadvantages caused by the presence of the foreign substances between the sliding surfaces can be easily avoided by reliably collecting the foreign substances existing between the sliding surfaces using the lubricating-liquid groove and the foreign-substance collector.

The present disclosure relates to a structure for reducing thermal displacement of a machine tool structure, and more particularly, to a structure for reducing thermal displacement of a machine tool structure capable of reducing thermal displacement of a structure in order to prevent processing precision from deteriorating due to deformation of a fixed structure by heat generated at a part where the fixed structure and a movable structure perform frictional motion together with each other. Accordingly, in order to resolve a technical problem, an object of the present invention is to provide a structure for reducing thermal displacement of a machine tool structure capable of preventing a structure from being deformed and distorted by reducing a temperature deviation over the entire structure by rapidly transferring heat to other parts when a temperature of a specific part of the structure is raised.

The invention relates to a tool holding device comprising a tool holding body for securing, in a fixed manner, a rotary tool comprising a shaft, provided with a clamping section and a receiving opening for the shall of the tool, a coolant feeding device for pressurized fluid, at least one coolant guiding device for guiding the coolant into a clamped tool shaft. The coolant guiding device is designed as at least one flat groove on an inner side of the receiving opening, joining to the front side on a free end of the tool holding body and directly adjacent to the tool shaft in the surroundings of the tool holding device or a coolant storing chamber and or collecting chamber is provided in the region of the free end of the tool holding body, to which the at least one coolant guiding device joins. The coolant storing chamber and or collecting chamber is connected by means of an annular gap to the surroundings of the tool holder device. The coolant storing chamber and/or collecting chamber and the annular gap are defined at least partially by the work shaft.

The invention relates, on the one hand, to a machine element (6), for example a motor spindle or an electromechanical drive unit, with integrated, internal cooling system (8) and, on the other hand, to a closed cooling circuit (24) with corresponding machine element (6). According to the invention, the cooling takes place with a special coolant (4). The coolant (4) is a dispersion containing at least one Phase Change Material (PCM).

Provided is a machining tool having a telescopic cover, with a plurality of covers sequentially overlapped and telescopic in the moving direction of the movable portion of the machine tool. The machining includes a lubricant supply unit to supply a lubricant to a slide portion of the telescopic cover.