Honing machine comprising a force sensor and telemetry signal and energy transmission

A honing machine for honing rotationally symmetrical bore holes in workpieces comprising:

• a honing spindle, which is movably mounted in a spindle housing, is rotatable about a spindle axis by means of a rotary drive, can be driven in an oscillating manner parallel to the spindle axis by means of a lifting drive and has at a tool-side end means for securing a honing tool arrangement,
• which has a tool body carrying at least one honing element, which by axial displacement of a tool-side expanding element that is axially displaceable inside the tool body can be infed radially in relation to a tool axis and can be pressed by a pressing force against an inner side of a bore hole to be machined;
• an expanding system with a machine-side expanding rod which is guided inside the honing spindle, is axially displaceable by means of an expanding drive in relation to the honing spindle and has a tool-side end portion, for coupling onto the tool-side expanding element;
• a control device for controlling operating movements of the honing spindle and the expanding system;
• and
• a force measuring system with a force sensor for generating a sensor signal proportional to the pressing force and a transmission path for transmitting the sensor signal or a signal derived therefrom to the control device,
• wherein the force sensor is arranged in the region of the tool-side end portion of the machine-side expanding rod and is connected to the control device by way of a telemetric transmission path;
• and
• wherein the transmission path has a second transformer unit, which has a first transformer element on the honing spindle or a component that is connected or can be connected to the honing spindle for rotation therewith and a second transformer element on the spindle housing or a component that is connected or can be connected to the spindle housing for rotation therewith, the first and second transformer elements being in transmission contact in every rotational position of the honing spindle that occurs during operation.