Hydraulic Pressing Device Return Valve Electronic Control
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Solution Overview
Problem
Existing hydraulic pressing devices rely on structurally determined return valve responses, limiting flexibility in achieving a predetermined pressing force, as the response pressure is fixed by the valve's design parameters.
Innovation Solution
The return valve is coupled to a shaft that rotates counter to its drive direction to actuate the delivery unit for the pressure medium, with an electronic control and monitoring unit generating control signals based on motor drive power or pressure values to trigger the return valve, allowing independent response to a predetermined pressing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the return valve is designed with fixed structural parameters, then the response pressure is determined, but the flexibility to achieve predetermined pressing force is limited
Solution Approach 1:
The patent replaces the traditional mechanically-determined return valve response with an electronically-controlled system. The electronic control unit monitors pressing force via measuring devices and triggers the return valve through electrical control signals, eliminating the need for complex structural adjustments in the return valve itself to achieve different pressing forces.
Solution Approach 2:
The system allows changing the predetermined pressing force by modifying electrical parameters (control signal thresholds, measuring device sensitivity) rather than changing the physical structure of the return valve. This enables flexible adjustment of pressing force while keeping the return valve structure simple and standardized.
2Ease of operation
If manual return to starting position is required, then simplicity is maintained, but ease of operation and functional reliability deteriorate
Solution Approach 1:
The system provides automatic return to the starting position through the electronic control unit that autonomously detects when the predetermined pressing force is achieved and automatically triggers the return valve. This eliminates the need for manual intervention while keeping the mechanical return mechanism simple, as the automation is handled through existing electrical control systems.
3Reliability
If pressure relief valve is used to limit maximum pressure, then safety is improved, but productivity decreases due to manual return requirement
Solution Approach 1:
The system uses measuring devices to continuously monitor the pressing force and provides feedback to the electronic control unit. When the predetermined pressing force is reached, the control unit automatically triggers the return valve, creating a closed-loop control system that ensures both safety (correct pressing force) and productivity (automatic cycle completion without manual intervention).
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 design enhances flexibility by enabling the return valve to be triggered in various ways, ensuring consistent and effective application of the predetermined pressing force, such as 32 kN, across different operational conditions.
Implementation Method 1
a pressing tool which is activated by pressure in a piston-cylinder unit containing a hydraulic medium
Implementation Method 2
the moving part being able to be moved back into an initial position by means of a return spring
Data Source
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AI summary
The device has a pressing tool moved from a rest position against force of a return spring into an operating position by pressure in a piston cylinder unit containing a hydraulic medium. The pressing tool is moved back into the rest position under the effect of the spring based on activation of a return valve (9) for the hydraulic medium. The return valve is coupled with a shaft in such a manner that the activation of the return valve takes place by a rotation of the shaft against its drive direction for operating a conveying unit for the pressure medium.