摘要:
The invention relates to a method of cooling and lubricating a metal-cutting rotating tool with a geometrically defined cutting element and/or the workpiece in the cutting zone. A coolant-lubricant and a carrier gas are fed separately into a tool shaft, brought together inside the rotating working spindle as close as possible to the cutting zone and directed via integral feed ducts onto the cutting element and/or cutting zone. Also disclosed is a device for applying this method. The coolant-lubricant and carrier gas are each introduced into a coolant reservoir completely or partially filled with a porous filler where they are mixed; the mixture is then fed directly into the cutting zone. Immediately behind the working spindle is a reservoir chamber filled completely or partially with a porous filler and comprising a substantially cylindrical closed casing with a coaxial feed aperture for the coolant-lubricant on one end face, radial feed apertures in the casing for the carrier gas and with an outlet aperture smaller than the casing diameter for the coolant-lubricant-carrier gas mixture in the end face of the casing opposite the feed aperture for the coolant-lubricant.
摘要:
A motor-driven working spindle for a machine tool has a casing in which a shaft is mounted for rotation. The shaft has a receptacle for a tool arranged at its front end. A spindle rotary drive is provided in the casing. Furthermore, a spindle advancing drive coupled with the shaft is provided in the casing.
摘要:
A motor-driven working spindle for a machine tool has a casing in which a shaft is mounted for rotation. The shaft has a receptacle for a tool arranged at its front end. A spindle rotary drive is provided in the casing. Furthermore, a spindle advancing drive coupled with the shaft is provided in the casing.
摘要:
Apparatuses which are, for example, used in telephone central exchanges or transmission arrangements have become increasingly more complicated. Interruptions in the transmission path within the apparatus can be detected with the aid of a test arrangement which comprises at least one transmitter, at least one receiver, and a control device. To that end, the transmitted test signal is compared with the received test signal. To reduce the cost and design efforts of the test arrangement and to avoid the use of switches which are susceptible to trouble, transmitters or receivers are arranged in the modules at the inputs or outputs of the modules. Signals from the control device can also be used for producing the test signal and to control the evaluation. The control device ends the test cycle when the transmitted test signal is received in the receiver. The transmission of useful signals and the test signal can be effected simultaneously.