Lightweight honing tool and hone strip

Abstract

The present invention relates to a honing tool having a tool body in lightweight construction, and at least two radially feedable hone strips, the hone strips being radially feedable via a rack-and-pinion gear, the rack-and-pinion gear comprising a central toothed shaft adapted and arranged to interact with racks associated to the respective hone strips to feed the hone strips, wherein the honing tool comprises a pneumatic measuring device for in-process diameter measurement of a diameter of an opening to be machined in a workpiece.

1 . A honing tool ( 10 ) comprising a tool body ( 11 ) in lightweight construction and at least two radially feedable hone strips ( 16 ), wherein the at least two radially feedable hone strips ( 16 ) are radially feedable by means of a rack-and-pinion gear ( 44 ), wherein the rack-and-pinion gear ( 44 ) comprises a central toothed shaft ( 40 ) which is adapted and arranged to interact with gear racks ( 42 ) associated respectively with the at least two radially feedable hone strips ( 16 ) to feed the at least two radially feedable hone strips ( 16 ), characterised in that the honing tool ( 10 ) comprises a pneumatic measuring device ( 26 ) for in-process diameter measurement of a diameter of an opening to be machined in a workpiece. 
     
     
         2 . The honing tool ( 10 ) according to  claim 1 , characterized in that the tool body ( 11 ) comprises a functional section ( 12 ) and a coupling section ( 14 ), wherein the functional section ( 12 ) comprises the at least two radially feedable hone strips ( 16 ) and the pneumatic measuring device ( 26 ), and the coupling section ( 14 ) comprises an interface for coupling the honing tool ( 10 ) to a honing spindle, and wherein the functional section ( 12 ) is gimbal-mounted in relation to the coupling section ( 14 ). 
     
     
         3 . The honing tool ( 10 ) according to  claim 2 , characterized in that the coupling section ( 14 ) comprises a coupling plate ( 30 ) on the spindle side, and two extensions ( 32 ) which form a bearing fork ( 34 ) for a gimbal bearing of the functional section ( 12 ) in relation to the coupling section ( 14 ). 
     
     
         4 . The honing tool ( 10 ) according to  claim 3 , characterized in that a first pivoting element ( 36 ) is mounted pivotably relative to the two extensions ( 32 ) about a first pivoting axis (S 1 ), wherein the first pivoting element ( 36 ) is formed by a frame element ( 36 ) which is arranged pivotably between the two extensions ( 32 ), and a second pivoting element ( 38 ) is mounted pivotably relative to the first pivoting element ( 36 ) about a second pivoting axis (S 2 ) which is arranged orthogonally to the first pivoting axis (S 1 ), wherein preferably the second pivoting element ( 38 ) is formed pin-like and in particular extends through the frame element ( 36 ). 
     
     
         5 . The honing tool ( 10 ) according to  claim 1 , characterized in that the functional section ( 12 ) comprises two plate-like elements ( 46 ,  48 ) between which the at least two radially feedable hone strips ( 16 ), the pneumatic measuring device ( 26 ) and the rack-and-pinion gear ( 44 ) are arranged. 
     
     
         6 . The honing tool ( 10 ) according to  claim 5 , characterized in that the pneumatic measuring device ( 26 ) comprises measuring strips ( 22 ) with measuring nozzles ( 24 ) arranged thereon, wherein the measuring strips ( 22 ) are held in measuring strip holders ( 20 ) which extend from the first plate-like element ( 46 ) to the second plate-like element ( 48 ), and/or in that the at least two radially feedable hone strips ( 16 ) extend from the first plate-like element ( 46 ) to the second plate-like element ( 48 ). 
     
     
         7 . The honing tool ( 10 ) according to  claim 1 , characterized in that the pneumatic measuring device ( 26 ) comprises measuring strips ( 22 ) with measuring nozzles ( 24 ) arranged thereon, wherein for each measuring strip ( 22 ) one positioning device ( 52 ) is provided which is adapted to adjust the radial position of the respective measuring strip ( 22 ). 
     
     
         8 . The honing tool ( 10 ) according to  claim 7 , characterized in that a positioning device ( 52 ) is formed by a screw-based fastening of the measuring strips ( 22 ) with respect to the functional section ( 12 ), wherein the fastening of the measuring strips ( 22 ) comprises at least a first screw ( 54 ) which is screwed into the functional section ( 12 ) and holds a measuring strip ( 22 ) or a corresponding measuring strip holder ( 20 ) from radially outwards, and a second screw ( 56 ) which is screwed into the measuring strip ( 22 ) or the corresponding measuring strip holder ( 20 ) and abuts on the functional section ( 12 ) such that the measuring strip ( 22 ) can be moved radially outwards relative to the functional section ( 12 ) by screwing the second screw ( 56 ) into the measuring strip ( 22 ) or the corresponding measuring strip holder ( 20 ). 
     
     
         9 . A hone strip ( 16 ) for use in the honing tool ( 10 ) according to  claim 1 , the hone strip ( 16 ) comprises a support ( 76 ) and at least one honing stone ( 18 ), characterized in that the support ( 76 ) has a clamping device ( 100 ) by means of which the at least one honing stone ( 18 ) can be releasably clamped and fixed to the support ( 76 ) in a clamping position of the clamping device ( 100 ). 
     
     
         10 . The hone strip ( 16 ) according to  claim 9 , characterized in that the clamping device ( 100 ) has at least one joining section ( 80 ), in particular fixedly arranged on the support ( 76 ), and a clamping element ( 102 ), wherein the at least one joining section ( 80 ) is adapted and arranged such that in the clamping position the at least one honing stone ( 18 ) abuts on the at least one joining section ( 80 ) in a circumferential direction (U), and wherein the clamping element ( 102 ) in the clamping position is arranged in the circumferential direction (U) on the opposite side of the at least one honing stone ( 18 ), abuts on and urges the at least one honing stone ( 18 ) in the circumferential direction (U) against the at least one joining section ( 80 ), so that the at least one honing stone ( 18 ) is clamped and held between the at least one joining section ( 80 ) and the clamping element ( 102 ). 
     
     
         11 . The hone strip ( 16 ) according to  claim 10 , characterized in that the clamping device ( 100 ) comprises a fixing element ( 112 ) which is adapted and arranged such that, in the clamping position, the fixing element ( 112 ) abuts on and urges the clamping element ( 102 ) towards the at least one joining section ( 80 ). 
     
     
         12 . The hone strip ( 16 ) according to  claim 10 , characterized in that a contact surface ( 124 ) between the at least one joining section ( 80 ) and the at least one honing stone ( 18 ) lies in a plane which extends substantially in the axial and radial directions, and/or in that a contact surface ( 128 ) between the clamping element ( 102 ) and the at least one honing stone ( 18 ) lies in a corresponding plane which extends substantially in the axial and radial directions. 
     
     
         13 . The hone strip ( 16 ) according to  claim 11 , characterized in that a contact surface ( 130 ) between the fixing element ( 112 ) and the clamping element ( 102 ) lies in a plane which extends in the axial direction and extends in a further direction ( 132 ) which is at an angle (a) relative to the radial direction (R), when looking at a corresponding plane extending orthogonally to the axial direction, wherein this angle (α) is either between 15° and 45°, or between 20° and 40°, or between 25° and 35°. 
     
     
         14 . The hone strip ( 16 ) according to  claim 11 , characterized in that the clamping element ( 102 ) and the fixing element ( 112 ) are adapted and arranged such that the fixing element ( 112 ) urges the clamping element ( 102 ) in a circumferential direction (U) towards the at least one honing stone ( 18 ) when the fixing element ( 112 ) moves in the radial direction (R), in particular radially inwards. 
     
     
         15 . The hone strip ( 16 ) according to  claim 11 , characterized in that the clamping device ( 100 ) comprises a tensioning mechanism ( 136 ) which is adapted to move the fixing element ( 112 ) during the transfer into the clamping position in the radial direction (R), in particular radially inwards. 
     
     
         16 . The hone strip ( 16 ) according to  claim 9 , characterized in that the hone strip ( 16 ) has two honing stones ( 18 ), the clamping device ( 100 ) has two joining sections ( 80 ) arranged outside in a circumferential direction (U), two clamping elements ( 102 ) arranged between the two honing stones ( 18 ) when viewed in the circumferential direction (U), and at least one fixing element ( 112 ) arranged between the clamping elements ( 102 ) when viewed in the circumferential direction (U). 
     
     
         17 . The honing tool ( 10 ) according to  claim 1 , characterized in that the honing tool ( 10 ) comprises at least one hone strip ( 16 ) having a support ( 76 ) and at least one honing stone ( 18 ), the support ( 76 ) having a clamping device ( 100 ) by means of which the at least one honing stone ( 18 ) can be releasably clamped and fixed to the support ( 76 ) in a clamping position of the clamping device ( 100 ). 
     
     
         18 . The honing tool ( 10 ) according to  claim 2 , characterized in that the functional section ( 12 ) comprises two plate-like elements ( 46 ,  48 ) between which the at least two radially feedable hone strips ( 16 ), the pneumatic measuring device ( 26 ) and the rack-and-pinion gear ( 44 ) are arranged. 
     
     
         19 . The honing tool ( 10 ) according to  claim 2 , characterized in that the pneumatic measuring device ( 26 ) comprises measuring strips ( 22 ) with measuring nozzles ( 24 ) arranged thereon, wherein for each measuring strip ( 22 ) one positioning device ( 52 ) is provided which is adapted to adjust the radial position of the respective measuring strip ( 22 ). 
     
     
         20 . A hone strip ( 16 ) for use in the honing tool ( 10 ) according to  claim 2 , the hone strip ( 16 ) comprises a support ( 76 ) and at least one honing stone ( 18 ), characterized in that the support ( 76 ) has a clamping device ( 100 ) by means of which the at least one honing stone ( 18 ) can be releasably clamped and fixed to the support ( 76 ) in a clamping position of the clamping device ( 100 )