Honing machine

Abstract

A honing machine for honing a bore in a workpiece comprises a support structure fixed to the machine and at least one honing unit which is mounted on the support structure and which has a spindle unit (150) in which a spindle shaft (152) is rotatably mounted, wherein the spindle shaft (152) is rotatable about a spindle axis (155) by means of a rotary drive (450) and, at a tool-side end (153), has a device for the fastening of an expandable honing tool. The honing machine furthermore comprises a stroke drive for generating a stroke movement of the spindle unit (150) and an expansion drive (550) for expanding the honing tool, wherein the expansion drive is coupled to an advancing rod (460) which runs in the interior of the spindle shaft. The spindle unit (150) has a spindle unit housing (310) which has a first housing portion (310-1) for accommodating the rotary drive (450) and a second housing portion (310-2) for accommodating the expansion drive (550). The rotary drive (450) is accommodated in an exchangeable first cartridge (400) and the expansion drive (550) is accommodated in a second cartridge (500) which is exchangeable independently of the first cartridge (400), wherein the first cartridge (400) is introducible into the first housing portion (310-1) and the second cartridge (500) is introducible into the second housing portion (310-2).

1 . A honing machine for honing a bore in a workpiece, comprising:
 a support structure fixed to the machine;   at least one honing unit mounted on the support structure and which has a spindle unit in which a spindle shaft is rotatably mounted, wherein the spindle shaft is rotatable about a spindle axis by means of a rotary drive and, at a tool-side end, has a device for the fastening of an expandable honing tool,   a stroke drive for generating a stroke movement of the spindle unit;   an expansion drive for expanding the honing tool, wherein the expansion drive is coupled to an advancing rod which runs in the interior of the spindle shaft;   the spindle unit comprising a spindle unit housing comprises a first housing portion for accommodating the rotary drive and a second housing portion for accommodating the expansion drive,   wherein the rotary drive is accommodated in an exchangeable first cartridge and the expansion drive is accommodated in a second cartridge which is exchangeable independently of the first cartridge, wherein the first cartridge is introducible into the first housing portion and the second cartridge is introducible into the second housing portion.   
     
     
         2 . The honing machine according to  claim 1 , wherein the spindle unit housing is formed as a monocoque housing in which the first housing portion is formed as a single piece with the second housing portion. 
     
     
         3 . The honing machine according to  claim 1 , wherein the first cartridge and the second cartridge are introducible into the spindle unit housing from opposite sides thereof. 
     
     
         4 . The honing machine according to  claim 1 , wherein, on an inner side of the first housing portion, there is formed at least one first fitting surface which, in contact with at least one corresponding first fitting surface on the first cartridge, effects an alignment of the first cartridge in the first housing portion, and/or wherein, on an inner side of the second housing portion, there is formed at least one second fitting surface which, in contact with at least one corresponding second fitting surface on the second cartridge, effects an alignment of the second cartridge in the second housing portion. 
     
     
         5 . The honing machine according to  claim 1 , wherein, on the spindle unit housing, there are formed axial stop surfaces for predefining an axial position of the first cartridge in the first housing portion and of the second cartridge in the second housing portion. 
     
     
         6 . The honing machine according to  claim 1 , wherein, on a side, which is to face towards the second cartridge, of the first cartridge, and on a side, which is to face towards the first cartridge, of a housing portion of the spindle unit housing, there are arranged corresponding connecting elements of at least one plug-type connection for the transfer of at least one of fluid, electrical power and electrical signals. 
     
     
         7 . The honing machine according to  claim 1 , wherein the expansion drive comprises has a torque motor. 
     
     
         8 . The honing machine according to  claim 1 , wherein, in a cartridge housing of the first cartridge, there are formed fluid channels for conducting fluid. 
     
     
         9 . The honing machine according to  claim 8 , wherein the fluid is cooling fluid for the rotary drive.