Coolant Supply Device Pump Pressure Control
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Solution Overview
Problem
Existing coolant supply systems for machine tools, particularly center-through coolant types, face complexity in controlling coolant spraying due to the need to manage both pressure and flow rate, making it difficult to achieve accurate machining without cumbersome control systems.
Innovation Solution
A coolant supply device with a pump, a measurement device to monitor discharge pressure, and a control unit that adjusts the pump's rotation rate based on target pressure settings, allowing for independent determination of coolant flow path diameter and optimal discharge pressure without requiring feedback control of the pump's rotation rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If constant-horsepower operation control is implemented to maintain the product of pressure and flow rate as nearly constant, then machining accuracy is improved, but the control system becomes complicated due to needing to control both pressure and flow rate parameters
Solution Approach 1:
The patent extracts flow rate control from the control system, keeping only pressure control. The flow rate is determined passively by the coolant flow path diameter in the tool rather than being actively controlled, thus simplifying the control system while maintaining machining accuracy through proper pressure management
Solution Approach 2:
The tool's coolant flow path diameter automatically determines the flow rate based on the applied pressure, eliminating the need for external flow rate control mechanisms. The system self-regulates flow rate through its physical design rather than requiring active control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies coolant control by using only discharge pressure as a control parameter, enabling accurate coolant supply and determining optimal flow path diameters and pressures without needing information from the tool, thus improving machining accuracy and reducing system complexity.
Implementation Method 1
a pump (for example, a gear pump 101) that supplies a coolant to a tool
Implementation Method 2
a measurement device (a pump discharge pressure measurement device 22) that measures a discharge pressure of the pump (101)
Data Source
AI summary
A coolant supply device and supply method that can appropriately control the spraying of coolant using a single parameter. A pump (101) supplies coolant to a tool (D), and a measurement device (22) measures the discharge pressure of the pump (101). A control device (50) has a function for determining, from the rotation rate of the pump (101), the coolant flow path diameter for the tool (D) and the target value for the pump discharge pressure (target pressure) when the tool (D) is drilling.