A warm-up evaluation device includes: a temperature data acquisition unit that acquires temperature data before warm-up operation when a machine performs the warm-up operation; a parameter value acquisition unit that acquires parameter values set in a program for performing the warm-up operation; an evaluation data acquisition unit that acquires evaluation data for evaluating a result of the warm-up operation; a learning unit that learns a machine learning model which receives the temperature data and the parameter values as an input and outputs the evaluation data on the basis of a plurality of warm-up operations performed by the same or the same types of machines; and an evaluation unit that inputs candidates for the parameter values to the machine learning model together with the temperature data and outputs the evaluation data when the same or the same types of machines perform a new warm-up operation.

A horizontal lathe for manufacturing a porous optical fiber preform, the horizontal lathe being configured to hold and fix two opposite ends of a target in such a manner that a longitudinal direction of the target is a substantially horizontal direction, and cause the target to be rotated around an axis parallel to the longitudinal direction thereof as a rotation axis. The horizontal lathe includes a thermal expansion absorbing mechanism configured to absorb a change in dimension of the target, the change being due to thermal expansion of the target in a direction of the rotation axis.

A method for setting up an apparatus (100) which is formed for machining a workpiece with a tool (20) comprises: providing the tool (20) in the region of the apparatus (100), providing a line assembly (53) in the region of the apparatus (100), which is fitted with at least one outlet nozzle, transferring a first linear axis (A1) of the apparatus (100) to a changing position by moving at least one axis of the apparatus (100), receiving the tool (20) by a tool spindle (21) which is carried by the first linear axis (A1), and the line assembly (53) plus the at least one outlet nozzle by a clamping system which is carried directly or indirectly by the first linear axis (A1), or by an additional axis, wherein the receiving of the tool (20) and the receiving of the line assembly (53) occur successively or simultaneously.

A control device of the present invention estimates warm-up time that it takes for a warm-up of a machine based on the temperature of the machine to be warmed up and the saturation temperature that is unique to the machine. Warm-up start time is calculated based on the obtained warm-up time and predefined warm-up end time. In this way, the warm-up can be efficiently performed as the warm-up can be performed for an appropriate period of time in consideration of the saturation temperature unique to the machine.

A position measuring device for use on a machine tool includes a scale section that can be scanned by way of a scanner device and serves to detect a position of a first component of the machine tool in relation to a second component of the machine tool, which is movable in relation to the first component, when the scale section is arranged on the first component and the scanner device is arranged on the second component, and at least one holding element as a constituent of an indirect attachment for indirectly attaching the scale section to the first component of the machine tool. A material of the at least one holding element has a thermal expansion coefficient that is less than a thermal expansion coefficient of a material of the first component of the machine tool.

A tool has a machine body, a driving assembly, and a machining assembly. The driving assembly has a first holding base, a second holding base, a threaded rod, a moving base, and a thermal compensation gap. The threaded rod is formed as a single part and has a driving thread segment, a first assembling segment, and a second assembling segment. The driving thread segment has a first end and a second end opposite the first end. The thermal compensation gap is formed between the first end of the driving thread segment and the first holding base. The machining assembly is mounted securely on the moving base.

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 hand-held machine tool, in particular a sanding machine, including a handle element for the user to grip and a processing head which has an electric drive motor for driving a tool holder provided for holding a processing tool, the hand-held machine tool having a power supply system for supplying power to the drive motor by means of a cable arrangement, via which the drive motor and the power supply system are interconnected. A protection circuit including at least one electric disconnector is arranged on the drive motor, in order to disconnect a connection between at least one electric cable of the cable arrangement and a phase of a field coil arrangement of the drive motor, which phase can be supplied with current via the cable.

A temperature regulation system and a temperature regulation method are applicable to a machine tool. The temperature regulation system includes a cooling fluid storage tank, a heating fluid storage tank, an internal circulation subsystem, an external circulation subsystem and a computing unit. The internal circulation subsystem includes a first valve. The external circulation subsystem includes a plurality of flow channels and a second valve and a third valve disposed on the plurality of the flow channels. The computing unit controls the first valve, the second valve and the third valve to switch flow directions of the plurality of the flow channels among the cooling fluid storage tank, the heating fluid storage tank and machine tool. Therefore, a thermal balance of the machine tool can be effectively maintained.

A spindle device includes: a spindle housing; a spindle shaft configured to be rotatably supported inside the spindle housing; a spindle mount having an insertion cavity into which the spindle housing is inserted along the axial direction of the spindle shaft; a flange portion projecting outward from the outer peripheral surface of the spindle housing and configured to be removably fixed to an end of the spindle mount that is closer to one opening of the insertion cavity; and a support member configured to support the spindle housing inserted in the insertion cavity by using, as a base, the other end of the spindle mount that is closer to the other opening of the insertion cavity.