Woodworking spindle, moulding machine with such a spindle, and method using such a spindle

A moulding machine comprising one or more spindles with tools for machining longitudinal sides of elongate workpieces of wood and plastic material in a continuous process, wherein at least one of the spindles comprises:

• a spindle housing comprising one or more axial bores that open at an axial end face of the spindle housing;
• a spindle shaft disposed in the spindle housing;
• one or more rotary bearings supporting the spindle shaft in the spindle housing;
• one or more temperature sensors for detecting a temperature of the one or more rotary bearings, wherein the one or more temperature sensors are arranged in the one or more axial bores of the spindle housing;
• at least one evaluation unit, wherein temperature signals generated by the one or more temperature sensors are supplied to the at least one evaluation unit that generates output signals based on an evaluation of the temperature signals generated by the one or more temperature sensors.

A method for monitoring a temperature of one or more rotary bearings of a spindle of a woodworking machine, wherein the spindle comprises a spindle housing;

• a spindle shaft disposed in the spindle housing;
• one or more rotary bearings supporting the spindle shaft in the spindle housing;
• one or more temperature sensors for detecting a temperature of the one or more rotary bearings;
• at least one evaluation unit, wherein temperature signals generated by the one or more temperature sensors are supplied to the at least one evaluation unit that generates output signals based on an evaluation of the temperature signals generated by the one or more temperature sensors;
• the method comprising:
• permanently detecting the temperature of the one or more rotary bearings and generating rotary bearing temperature signals;
• supplying the rotary bearing temperature signals to the at least one evaluation unit;
• comparing in the at least one evaluation unit the rotary bearing temperature signals with a first preset temperature limit value;
• generating a first output signal when the rotary bearing temperature signals reach the first preset temperature limit value;
• detecting an ambient temperature of the spindle by at least one additional temperature sensor that generates ambient temperature signals and, based on the ambient temperature signals, adjusting the first preset temperature limit value in order to compensate for the ambient temperature of the spindle.

A method for monitoring a temperature of one or more rotary bearings of a spindle of a woodworking machine, wherein the spindle comprises a spindle housing;

• a spindle shaft disposed in the spindle housing;
• one or more rotary bearings supporting the spindle shaft in the spindle housing;
• one or more temperature sensors for detecting a temperature of the one or more rotary bearings;
• at least one evaluation unit, wherein temperature signals generated by the one or more temperature sensors are supplied to the at least one evaluation unit that generates output signals based on an evaluation of the temperature signals generated by the one or more temperature sensors;
• the method comprising:
• permanently detecting the temperature of the one or more rotary bearings and generating rotary bearing temperature signals;
• supplying the rotary bearing temperature signals to the at least one evaluation unit;
• comparing in the at least one evaluation unit the rotary bearing temperature signals with a first preset temperature limit value;
• generating a first output signal when the rotary bearing temperature signals reach the first preset temperature limit value;
• detecting an ambient temperature of the spindle by at least one additional temperature sensor that generates ambient temperature signals and, based on the ambient temperature signals, adjusting a measured temperature value of the spindle in order to compensate for the ambient temperature of the spindle.