Machine Tool Coolant Pump Switching for Chip and Oil Discharge
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Solution Overview
Problem
Existing machine tools face challenges in reliably discharging foreign matter such as oil and chips from the coolant collection tank, leading to accumulation and inefficient coolant circulation.
Innovation Solution
A machine tool with a control unit that manages two control modes for the coolant pump: an ON/OFF mode to fluctuate coolant levels and discharge foreign matter, and an analog mode to maintain constant coolant levels, along with a light source for mode indication and abnormality handling, ensuring efficient coolant circulation and prevention of coolant depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pump is controlled to maintain constant coolant amount in the collection tank, then coolant circulation is stable, but foreign matter accumulates in the collection tank
Solution Approach 1:
The pump control mode is switched from static (constant coolant amount) to dynamic (alternating between first and second control modes). The control unit alternates between maintaining constant coolant amount and discharging foreign matter by creating液位 fluctuation, thereby preventing foreign matter accumulation while maintaining stable coolant circulation.
Solution Approach 2:
The control unit implements periodic switching between the first control mode (constant coolant amount) and the second control mode (foreign matter discharge). This periodic action creates cyclical液位 fluctuation that effectively discharges foreign matter while maintaining overall coolant circulation stability.
2Object-generated harmful factors
If the pump is frequently switched between ON and OFF to discharge foreign matter, then foreign matter is discharged effectively, but coolant level stability deteriorates
Solution Approach 1:
The system dynamically switches between two control modes: the first mode maintains constant coolant amount for stability, while the second mode creates液位 fluctuation for foreign matter discharge. This dynamic control resolves the contradiction between stability and foreign matter discharge effectiveness.
Solution Approach 2:
The control unit periodically alternates between the first control mode (stability-focused) and the second control mode (discharge-focused). This periodic switching achieves effective foreign matter discharge while maintaining overall coolant level stability through controlled alternation.
3Stability of the object's composition
If the pump runs continuously to maintain constant coolant amount, then coolant level is stable, but energy consumption increases
Solution Approach 1:
The control unit periodically switches between the first control mode (pump runs to maintain constant level) and the second control mode (pump creates液位 fluctuation). This periodic operation reduces continuous pump running time while maintaining coolant level stability and achieving foreign matter discharge.
Solution Approach 2:
The system dynamically adjusts pump operation between two control modes, avoiding continuous operation. The control unit intelligently switches modes based on the need for stability versus foreign matter discharge, thereby reducing overall energy consumption while maintaining system functionality.
Data Source
AI summary
Machine tool includes an ejection part, a first tank, a second tank, a pump, and a control unit. Control modes of the pump include: a first control mode in which the pump is driven when a first coolant amount in the first tank is more than a first predetermined amount and the pump is stopped when the first coolant amount is less than a second predetermined amount; and a second control mode in which the pump is driven so that the first coolant amount is a constant amount. The control unit controls the pump in first control mode when a second coolant amount in the second tank is more than or equal to a third predetermined amount, and switches the control mode of the pump from the first control mode to the second control mode when the second coolant amount is less than the third predetermined amount.