Patent ID: 8259004
Filing Date: 2012-09-04
Classification: B23Q,Y10T

Abstract:
1. Device for monitoring the position of a tool ( 4 ) or machine element ( 30 ) on or in a work spindle ( 1 ) or a tool chuck ( 27 ), in particular in a machining apparatus, wherein the work spindle ( 1 ) or tool chuck ( 27 ) has at least one channel ( 5 , 6 , 7 ′ 35 , 36 ) that defines a waveguide for propagating electromagnetic waves that leads from an outer surface of work spindle ( 1 ) or tool chuck ( 27 ) to tool ( 4 ) or machine element ( 30 ), and in that at least one radar system ( 11 ; 37 ) is provided and arranged outside work spindle ( 1 ) or tool chuck ( 27 ) in such a manner that it is capable of irradiating a radar signal from the outer surface into channel ( 5 , 6 , 7 ; 35 , 36 ) and of receiving a radar signal reflected back out of channel ( 5 , 6 , 7 ; 35 , 36 ), and in that radar system ( 11 ; 37 ) is connected to a signal-processing device ( 18 , 19 , 20 ; 26 ) that determines a measure of the position of tool ( 4 ) or machine element ( 30 ) in relation to work spindle ( 1 ) or tool chuck ( 27 ) based on at least one radar signal irradiated into channel ( 5 , 6 , 7 ; 35 , 36 ) and reflected out of channel ( 5 , 6 , 7 ; 35 , 36 ).