Tool holder having a collet holder and a tool insert for use in a tool holder

Abstract

A system is proposed that is made up of a tool holder 1 , a collet 15 with a clamping nut 19 , and a tool insert 27 , in which the collet 15 and the tool insert are fixed and positioned on various function surfaces within the tool holder 1 . Nevertheless, the clamping means are the same, namely a thread on the tool holder 1.

1 . A tool holder having a collet holder, whereby the collet holder includes a conical borehole ( 9 ) and a thread ( 3 ,  53 ) that is arranged so as to be coaxial with respect to the conical borehole ( 9 ), and whereby the thread ( 3 ,  53 ) cooperates with a clamping nut ( 19 ) when a collet ( 15 ) is clamped, wherein means to center a tool insert ( 27 ) are configured in the axial direction between a first end of the conical borehole ( 9 ) and the thread ( 3 ,  53 ). 
     
     
         2 . A tool holder as recited in  claim 1 , wherein means for centering a tool insert ( 27 ) are configured as a short taper ( 5 ), a cylinder, and/or a polygon ( 73 ). 
     
     
         3 . The tool holder as recited in  claim 1 , wherein an axial contact ( 75 ) is configured in the axial direction between the first end of the conical borehole ( 9 ) and the thread ( 3 ,  53 ). 
     
     
         4 . The tool holder as recited in  claim 1 , wherein the conical borehole ( 9 ) is bordered in the axial direction at a second end by a cylindrical segment ( 11 ) and/or a carrier segment ( 13 ). 
     
     
         5 . The tool holder as recited in  claim 1 , wherein means for centering a tool insert ( 27 ), in particular the short taper ( 5 ) and the polygon ( 73 ), have an angle of taper (α) between 0° and 140°, preferably between 30° and 120°. 
     
     
         6 . The tool holder as recited in  claim 1 , wherein the thread is configured as an external thread ( 53 ). 
     
     
         7 . The tool holder as recited in  claim 1 , wherein the thread is configured as an internal thread ( 3 ). 
     
     
         8 . The tool holder as recited in  claim 1 , wherein a length (L) of the conical borehole ( 9 ) is dimensioned so that it permits the use of metal-seal collets ( 15 ). 
     
     
         9 . The tool holder as recited in  claim 4 , wherein a cylindrical segment ( 11 ) and, connected thereto, the carrier segment ( 13 ) are arranged on the second end of the conical borehole ( 9 ). 
     
     
         10 . The tool holder as recited in  claim 4 , wherein the carrier segment ( 13 ) and, connected thereto, the cylindrical segment ( 11 ) are arranged on the second end of the conical borehole ( 9 ). 
     
     
         11 . The tool holder as recited in  claim 4 , wherein the carrier segment ( 13 ) has at least one contact surface ( 67 ). 
     
     
         12 . The tool holder as recited in  claim 4 , wherein the carrier segment ( 13 ) includes a neck ( 65 ), a diameter enlargement ( 69 ), and a contact surface that is configured as a chamfer ( 67 ), whereby the chamfer ( 67 ) is arranged in the axial direction between the neck ( 65 ) and the diameter enlargement ( 69 ). 
     
     
         13 . The tool holder as recited in  claim 4 , wherein the carrier segment ( 13 ) has at least two axial grooves ( 71 ). 
     
     
         14 . The tool holder as recited in  claim 4 , wherein the cross section of the carrier segment ( 13 ) corresponds to a polygon profile. 
     
     
         15 . The tool holder as recited in  claim 14 , wherein the contact surfaces ( 73 ) of the carrier segment ( 13 ) having a polygonal cross section are configured so as to be spiral- or screw-shaped. 
     
     
         16 . A tool insert ( 45 ) to be received in a tool holder ( 1 ) as recited in  claim 1 , wherein the tool insert ( 25 ) has a counterpart surface that cooperates with the means for centering a tool insert ( 27 ). 
     
     
         17 . The tool insert as recited in  claim 16 , wherein the counterpart surface of the tool insert ( 27 ) is configured as an external cone ( 53 ), a cylinder, and/or as a polygon ( 79 ). 
     
     
         18 . The tool insert as recited in  claim 16 , wherein the tool insert ( 27 ) includes a pin ( 39 ) that cooperates with the cylindrical segment ( 11 ) of the tool holder ( 1 ) and/or a carrier ( 41 ) that cooperates with the carrier segment ( 13 ) of the tool holder ( 1 ). 
     
     
         19 . The tool insert as recited in  claim 16 , wherein the tool insert ( 27 ) in the installed state does not make contact with the conical borehole ( 9 ) of the tool holder ( 1 ). 
     
     
         20 . The tool insert as recited in  claim 16 , wherein the tool insert ( 27 ) includes a means for attaching the tool insert ( 27 ) within a tool holder ( 1 ). 
     
     
         21 . The tool insert as recited in  claim 20 , wherein means are configured as a clamping nut ( 19 ) having an external thread ( 21 ) or an internal thread ( 55 ), the clamping nut ( 43 ) is rotatably supported on the tool insert ( 27 ), and the axial forces that are required to attach the tool insert ( 27 ) within the tool holder ( 1 ) are transmitted by the mounting ( 33 ,  47 ). 
     
     
         22 . The tool insert as recited in  claim 16 , wherein the carrier ( 41 ) has at least two lugs ( 61 ), and the lugs ( 61 ) form a form-locking and rotationally fixed connection with the carrier segment ( 13 ) of the tool holder ( 1 ) in accordance with  claims 12  or  13 . 
     
     
         23 . The tool insert as recited in  claim 22 , wherein the lugs ( 61 ) of the carrier ( 43 ) have at least one contact surface ( 63 ). 
     
     
         24 . The tool insert as recited in  claim 16 , wherein the carrier ( 43 ) has a polygonal cross section, and the carrier ( 43 ) forms a form-locking and rotationally fixed connection with the carrier segment ( 13 ) of the tool holder ( 1 ). 
     
     
         25 . The tool insert as recited in  claim 24 , wherein the contact surface of the carrier ( 43 ) is configured in a spiral or screw shape and is designed to complement the at least one contact surface of the tool holder. 
     
     
         26 . The tool insert as recited in  claim 18 , wherein the at least one contact surface ( 63 ) of the carrier ( 43 ) forms a contact angle (γ) with the longitudinal axis of the tool insert ( 27 ), and the contact angle (γ) lies in a range between 0° and 60°, preferably in a range between 0° and 30°. 
     
     
         27 . The tool insert as recited in  claim 16 , wherein the tool insert ( 27 ) is hollow.