Automatic greasing device for chuck in crankshaft miller

An automatic greasing device for a chuck in a crankshaft miller which includes the chuck that comprises a plurality of chuck jaws radially and slidably inserted into a chuck body and which cuts a workpiece clamped by the chuck jaws by means of a rotary cutter, the automatic greasing device comprising:

• a rotary cutter life determination unit which determines whether or not the rotary cutter has reached an end of its life based on at least one of:
• (i) a counted number of machined workpieces, (ii) a time required for machining the workpieces, and (iii) measured electric current values required for machining the workpieces;
• a rotary cutter replacement command signal output unit which, when it is determined that the rotary cutter has reached the end of its life, outputs a rotary cutter replacement command signal based on a rotary cutter life determination datum output from the rotary cutter life determination unit;
• a greasing command signal output unit which outputs a greasing command signal in response to the rotary cutter replacement command signal acting as a trigger signal output from the rotary cutter replacement command signal output unit;
• a grease supply device which supplies grease to a sliding part inside the chuck in response to the greasing command signal output from the greasing command signal output unit, wherein the sliding part includes a part between the chuck body and each of the chuck jaws;
• a notification command signal output unit which outputs a notification command signal in response to the rotary cutter replacement command signal acting as the trigger signal output from the rotary cutter replacement command signal output unit;
• a notification unit which notifies that the rotary cutter needs replacement in response to the notification command signal output from the notification command signal output unit;
• a chuck cleaning command signal output unit which outputs a chuck cleaning command signal in response to the greasing command signal acting as a trigger signal output from the greasing command signal output unit;
• and
• a display unit which displays a description urging cleaning of the chuck in response to the chuck cleaning command signal output from the chuck cleaning command signal output unit.