The invention relates to a machine tool (1), in particular a dental milling machine or mill-turning machine, comprising a spindle (10) for receiving a tool and a working arm (12) for receiving a workpiece and comprising at least one nozzle (14a) attached to the spindle (10), in particular with its outlet direction (R) substantially parallel to the axis of rotation (A) of the spindle (10), characterized in that a deflecting body (16) is attached to the spindle (10) or clamped therein, said deflecting body extending in particular at least partially in front of the nozzle (14a). Further, the invention relates to a method of operating the machine tool (1).

The invention relates to a device for cooling workpieces. The device has at least one nozzle which is configured to blow a fluid onto a workpiece. At least one surface temperature sensor is able to be arranged on the workpiece. In order to cool the workpiece, it is blown with a fluid by means of the at least one nozzle, the temperature of said fluid being lower than the surface temperature of the workpiece. In the process, the surface temperature is monitored by means of the at least one surface temperature sensor.

The present invention relates to a transport device (100) for receiving one or more module units having machine tool accessory devices and for transporting the one or more received module units to a machine tool (1000) set up on a base surface for use of the machine tool accessory devices of the one or more received module units on the machine tool (1000), wherein the transport device (100) is freely movable on the base surface for positioning the one or more received module units relative to the machine tool (1000), in particular within a region in front and/or next to the machine tool (1000) and/or in front and/or next to a working space of the machine tool (1000).

A coolant processing apparatus removes sludge from a coolant discharged from a machine tool. The coolant processing apparatus includes a first reservoir and a second reservoir provided in a tank for retaining the coolant. The first reservoir includes a flow path in which the discharged coolant flows, and a portion downstream of the flow path to retain the coolant such that the sludge remains in the first reservoir. The flow path has at least one bend to bend a flow of the coolant at least once in a horizontal direction. The second reservoir retains the coolant flowing out from the first reservoir. A boundary wall is provided between the first and second reservoirs, at a location downstream of the at least one bend of the flow path, and has such a height that allows a supernatant of the coolant in the first reservoir to flow into the second reservoir.

The invention relates to a device for cooling workpieces. The device has at least one nozzle which is configured to blow a fluid onto a workpiece. At least one surface temperature sensor is able to be arranged on the workpiece. In order to cool the workpiece, it is blown with a fluid by means of the at least one nozzle, the temperature of said fluid being lower than the surface temperature of the workpiece. In the process, the surface temperature is monitored by means of the at least one surface temperature sensor.

A coolant nozzle carrier for use with a grinding machine that has a grinding spindle for supporting and driving a grinding disc with a rotational axis. The coolant nozzle carrier comprises at least two coolant nozzles and at least a center leg and two side legs that are attached to the center leg. Each of the side legs supports at least one nozzle and extends in a plane that is perpendicular to the rotational axis. The side legs are configured to accommodate the grinding disc in between the side legs with a moving gap defined between the grinding disc and the side legs.

A device for cooling and lubricating a tool during a chip removal machining process, which includes: a first subsystem for cryogenic cooling that includes: a first entry configured to introduce CO.sub.2 in liquid state in a first conduit of the device; a first exit configured to supply CO.sub.2 in liquid state from a second conduit of the device; a third conduit located between the first and second conduit; and means for preventing the formation of dry ice in the first, second and third conduits; and a second subsystem for lubrication that includes means for supplying micro-particles of a cutting oil in liquid state; wherein the first subsystem and second subsystem are independent from each other, and wherein the first subsystem and second subsystem are configured to act either simultaneously or either one alone. Method of operation of the device.

A coolant processing apparatus removes sludge from a coolant discharged from a machine tool. The coolant processing apparatus includes a first reservoir and a second reservoir provided in a tank for retaining the coolant. The first reservoir includes a flow path in which the discharged coolant flows, and a portion downstream of the flow path to retain the coolant such that the sludge remains in the first reservoir. The flow path has at least one bend to bend a flow of the coolant at least once in a horizontal direction. The second reservoir retains the coolant flowing out from the first reservoir. A boundary wall is provided between the first and second reservoirs, at a location downstream of the at least one bend of the flow path, and has such a height that allows a supernatant of the coolant in the first reservoir to flow into the second reservoir.

The invention primarily relates to a system (10) for detecting a total or partial obstruction of at least one internal fluid pipe (11) of a tool (12), characterized in that said system (10) comprises: a pneumatic system (13) that is intended to be connected upstream of said internal pipe (11) of said tool (12), a pressure source (16) that is connected to said pneumatic system (13) by means of a solenoid valve (17), and a control unit (22) that is configured to open said solenoid valve (17) so as to pressurize said pneumatic system (13), and then to close said solenoid valve (17) so as to let said pneumatic system (13) be emptied freely by means of said internal pipe (11), and to detect an obstruction state of said internal pipe (11) depending on an analysis over time of a change in the pressure in said pneumatic system (13).

A method for supplying cutting oil in a machine tool for cutting work pieces, including the steps of retaining cutting oil in a minimum reference quantity or an initial reference quantity in the cutting-oil tank, measuring a supply quantity per unit time q of the cutting oil flowing out from the cutting-oil tank and supplied to a cutting area of work pieces, either supplying the cutting oil to the cutting-oil tank by a quantity per unit time q larger than q and the supply is stopped in the case where the cutting-oil tank is filled, and the supplying and stopping are repeated as necessary, or supplying the cutting oil to the cutting-oil tank by a quantity per unit time equal to the supply quantity per unit time q.