Machine tool, machine tool control method, and non-transitory computer-readable medium comprising machine tool control program
There is provided a technique for more reliably detecting clogging of a filter with chips over conventional techniques. A machine tool that can machine a workpiece includes a storage tank; a discharge unit that discharges coolant stored in the storage tank toward chips resulting from the machining of the workpiece; a filter that removes the chips from the coolant; a collecting pump that brings the coolant back to the storage tank; a first obtaining unit that obtains a first index value indicating an amount of coolant discharged per predetermined time; a second obtaining unit that obtains a second index value indicating an amount of coolant that is brought back to the storage tank per predetermined time; and a notifying unit that notifies of an abnormality in the filter when a result of comparison of the first index value with the second index value satisfies a predetermined abnormality condition.
1 . A machine tool that can machine a workpiece, the machine tool comprising:
a storage tank that stores coolant;
a discharge unit that discharges the coolant stored in the storage tank toward chips resulting from the machining of the workpiece;
a filter that removes the chips from the coolant having been discharged toward the chips;
a collecting pump that brings the coolant having passed through the filter back to the storage tank;
a first obtaining unit that obtains a first index value indicating an amount of the coolant discharged from the discharge unit per predetermined time;
a second obtaining unit that obtains a second index value indicating an amount of the coolant that passes through the filter and is brought back to the storage tank per the predetermined time; and
a notifying unit that notifies of an abnormality in the filter when a result of comparison of the first index value with the second index value satisfies a predetermined abnormality condition.
2 . The machine tool according to claim 1 , further comprising a display unit, wherein the notifying unit displays, on the display unit, an alert indicating occurrence of clogging of the filter with the chips.
3 . The machine tool according to claim 1 ,
wherein the predetermined abnormality condition is satisfied when a difference value of the first index value from the second index value exceeds a predetermined value.
4 . The machine tool according to claim 1 , further comprising a collecting tank that receives the coolant having passed through the filter.
5 . The machine tool according to claim 4 , wherein
the discharge unit includes:
a coolant nozzle; and
a discharge pump that sends the coolant to the coolant nozzle from the storage tank, and
the collecting pump sends the coolant from the collecting tank to the storage tank.
6 . The machine tool according to claim 5 , wherein
the first index value includes a drive frequency of a motor for driving the discharge pump, and
the second index value includes a drive frequency of a motor for driving the collecting pump.
7 . A control method for a machine tool that can machine a workpiece, wherein
the machine tool includes:
a storage tank that stores coolant;
a discharge unit that discharges the coolant stored in the storage tank toward chips resulting from the machining of the workpiece;
a filter that removes the chips from the coolant having been discharged toward the chips; and
a collecting pump that brings the coolant having passed through the filter back to the storage tank, and
the control method comprises:
obtaining a first index value indicating an amount of the coolant discharged from the discharge unit per predetermined time;
obtaining a second index value indicating an amount of the coolant that passes through the filter and is brought back to the storage tank per the predetermined time; and
notifying of an abnormality in the filter when a result of comparison of the first index value with the second index value satisfies a predetermined abnormality condition.