Coolant supply device and grinding tool having a coolant supply device for a machine tool

Abstract

A grinding tool with a coolant supply device for a machine tool and such a coolant supply device. The coolant supply device for the grinding tool has a main body with engagement portions or holes and a line unit for redirecting coolant to a predeterminable processing area of the grinding tool. Using a clamping device, it is possible to releasably secure the coolant supply device to the shaft of the grinding tool. As a result of the attachment of the coolant supply device on the grinding tool, it is possible to tap the coolant of the machine tool via an additional valve device on the connector ring of the machine tool from the standard cooling circuit and supply it to the grinding location in a predeterminable processing area of the grinding tool.

1 . A coolant supply device for a grinding tool for use on a machine tool with tool-carrying work spindle, comprising
 a main body, which includes at least one engagement portion,   a line unit, which is arranged on the main body and has at least one discharge opening for discharging coolant to a predeterminable processing region on the grinding tool, and   a clamping device for releasably attaching the coolant supply device onto the grinding tool,   wherein the coolant supply device can be secured to a connector ring of the work spindle of the machine tool via the engagement portion when the grinding tool is received on the work spindle of the machine tool.   
     
     
         2 . The coolant supply device according to  claim 1 , wherein
 the line unit has a coolant inlet which can dock by means of a docking device arranged on the connector ring of the work spindle of the machine tool for supplying coolant when the coolant supply device is secured to the connector ring of the work spindle of the machine tool via the engagement portion.   
     
     
         3 . The coolant supply device according to  claim 1 , wherein
 the clamping device is configured to secure the coolant supply device to the grinding tool before the coolant supply device is secured to the connector ring of the work spindle of the machine tool via the engagement portion.   
     
     
         4 . The coolant supply device according to  claim 3 , wherein
 the clamping device is configured to release the coolant supply device from being secured to the grinding tool when the coolant supply device is secured to the connector ring of the work spindle of the machine tool via the engagement portion.   
     
     
         5 . The coolant supply device according to  claim 4 , wherein
 in the state in which the coolant supply device is secured to the connector ring of the work spindle of the machine tool via the engagement portion and the line unit for supplying coolant is docked to the connector ring of the work spindle of the machine tool, a gap is adjusted between the coolant supply device and the grinding tool in such a way that the grinding tool rotationally driven by the work spindle is rotated without contact to the coolant supply device stationarily secured to the connector ring of the work spindle of the machine tool.   
     
     
         6 . The coolant supply device according to  claim 1 , wherein
 the clamping device comprises a slide and a docking element and wherein, in a first position, the slide engages in a first groove of a tool connection of the grinding tool in such a way that a rotary motion of the grinding tool about the shaft of the grinding tool is blocked and,   in order to release the coolant supply device, the slide leaves the first groove in a second position so as to render possible a movement of the grinding tool about the shaft relative to the coolant supply device.   
     
     
         7 . The coolant supply device according to  claim 6 , wherein
 the docking element is a tappet and the clamping device comprises a spring, which is in operative connection to the slide and the tappet.   
     
     
         8 . The coolant supply device according to  claim 1 , wherein
 the main body has at least two engagement portions and the engagement portions are designed in such a way that the coolant supply device is stationarily securable to the connector ring of the work spindle of the machine tool via clamping elements in the engagement portions.   
     
     
         9 . The coolant supply device according to  claim 1 , wherein
 the main body has a central through hole for receiving the grinding tool at the coolant supply device.   
     
     
         10 . The coolant supply device according to  claim 1 , wherein
 the coolant supply device has a coupling device for coupling the coolant supply device to a coolant circuit of the machine tool, the coupling device being a mechanically controllable, electrically controllable, hydraulically controllable and/or pneumatically controllable coupling device.   
     
     
         11 . The coolant supply device according to  claim 10 , wherein
 the line unit has a coolant inlet, which can dock by means of a docking device arranged on the connector ring of the work spindle of the machine tool for supplying coolant when the coolant supply device is secured to the connector ring of the work spindle of the machine tool via the engagement portion; and   the coupling device is configured to couple by means of the docking device to the connector ring of the work spindle of the machine tool, such that via the coupling of the coupling device to the docking device coolant from the coolant circuit of the connector ring of the work spindle can be supplied to the coolant inlet of the line unit.   
     
     
         12 . The coolant supply device according to  claim 10 , wherein
 the coupling device comprises a docking cylinder, which surrounds at least part of the cooling inlet.   
     
     
         13 . The grinding tool for use on a machine tool with tool-carrying work spindle, comprising a shaft, a grinding body provided on the shaft and a coolant supply device arranged on the shaft according to  claim 1 . 
     
     
         14 . The grinding tool according to  claim 13 , wherein
 the shaft has a tool connection for connecting the grinding tool to the work spindle of the machine tool and wherein the coolant supply device can be secured to the tool connection of the grinding tool.   
     
     
         15 . The grinding tool according to  claim 12 , wherein
 the coolant supply device is floatingly mounted on the grinding tool.   
     
     
         16 . The grinding tool according to  claim 15 , wherein
 a contour part is provided on the coolant supply device for the floating support of the coolant supply device, said contour part engaging in a second groove of the shaft of the grinding tool for supporting the grinding tool in an axial direction, and engaging in the first groove for supporting the slides in a radial direction.   
     
     
         17 . The grinding tool according to  claim 12 , wherein
 the clamping device secures in a securing position the coolant supply device to the shaft of the grinding tool in a radial direction and allows a rotation of the shaft about a longitudinal axis relative to the coolant supply device in a release position.   
     
     
         18 . The grinding tool according to  claim 17 , wherein the docking element is actuated for switching between the release position and the securing position. 
     
     
         19 . The grinding tool according to  claim 12 , wherein
 the slide of the coolant supply device is guided in the first groove, and wherein in the securing position the slide engages in the first groove of the grinding tool and in the release position the slide leaves the first groove so as to render possible a radial relative movement of the grinding tool to the coolant supply device.   
     
     
         20 . The grinding tool according to  claim 12 , wherein
 the discharge opening of the line unit is arranged in the region of the grinding body in such a way that a cooling lubricant can be supplied from the discharge opening into a work area of the grinding tool for the purpose of lubrication and/or cooling, wherein the alignment and/or orientation of the discharge opening of the line unit is mechanically, electrically, pneumatically and/or hydraulically adjustable and/or the line unit is releasably mounted.   
     
     
         21 . The grinding tool according to  claim 12 , wherein
 the docking element is movable along the movement axis which is parallel to the longitudinal axis of the shaft.   
     
     
         22 . The machine tool having a tool-carrying work spindle,
 which has a tool support and a connector ring, which is arranged in the region of the tool support,   wherein the connector ring has at least one inner line system for coolant and a clamping device for clamping at least one engagement portion of a coolant supply device according to  claim 1 ,   and   wherein a switching member is provided on the connector ring for switching the coolant flow from the inner line system of the connector ring to a docking device for coupling to the coolant supply device.   
     
     
         23 . The machine tool according to  claim 22 , wherein
 the machine tool comprises a tool changer and a tool magazine, and the tool changer is configured to exchange a tool which is clamped on the work spindle with a tool from the tool magazine,   wherein a grinding tool for use on a machine tool with tool-carrying work spindle, comprising a shaft, a grinding body provided on the shaft and a coolant supply device arranged on the shaft, can be received together with the coolant supply device in the tool magazine and can be inserted at the work spindle by the tool changer.   
     
     
         24 . The machine tool according to  claim 22 , wherein
 while clamping the grinding tool on the work spindle the coolant flow is switched from the inner line system of the connector ring to the coolant supply device by contacting the coupling device of the coolant supply device with the switching member of the docking device of the connector ring.   
     
     
         25 . The machine tool according to  claim 22 , wherein
 the coolant supply device with the grinding tool is switched to the securing position when arranged in the tool magazine and is switched to the release position when arranged at the work spindle.   
     
     
         26 . The machine tool according to  claim 22 , wherein
 for docking the coolant supply device to the machine tool, the clamping device of the connector ring engages in the at least one engagement portion and the coolant supply device is pulled axially towards the connector ring and the grinding tool is received on the support of the work spindle of the machine tool, wherein a gap is adjusted between the coolant supply device and the grinding tool by the docking of the coolant supply device and the receiving of the grinding tool.   
     
     
         27 . The machine tool according to  claim 22 , wherein during docking the docking element is actuated. 
     
     
         28 . The machine tool according to  claim 22 , wherein
 the switching member has an inner cylinder and a switching sleeve guided on the inner cylinder, wherein for switching the coolant flow from the inner line system to the coolant supply device, the switching sleeve is moved relative to the switching cylinder by a docking cylinder of the coupling device to release switching holes of the inner cylinder and to redirect the coolant flow.