Precision Blanking Press Piston Segmentation for Independent Force Control
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Solution Overview
Problem
Existing precision blanking press technologies face challenges in independently adjusting stripping/pushing and ejection forces, leading to high mass pistons causing undesirable impacts and high oil consumption, with complex and expensive hydraulic circuits.
Innovation Solution
The solution involves separating the knife-edged ring piston and counterstay piston into independent constructive units with separate pressure chambers, connected through controllable hydraulic circuits, allowing for independent operation and adjustment of stripping/pushing and ejecting forces, reducing piston mass and simplifying the hydraulic system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the knife-edged ring piston and counterstay piston are combined into a single constructive unit, then the device complexity is reduced, but the piston mass increases causing undesirable impacts and the hydraulic circuit becomes more complex
Solution Approach 1:
The patent divides the originally combined piston unit into two separate constructive units: a knife-edged ring piston unit and a counterstay piston unit. Each unit has its own pressure chambers and hydraulic control circuitry, allowing independent adjustment of stripping/pushing forces and ejection forces. This segmentation reduces the mass of each individual piston, eliminating undesirable impacts, while also simplifying the hydraulic circuit by allowing independent control of each function.
2Adaptability or versatility
If the stripping/pushing force and ejection force are controlled through a single hydraulic circuit, then the device complexity is reduced, but the adaptability of force adjustment is limited
Solution Approach 1:
The hydraulic control system is segmented into two independent controllable hydraulic circuits: one circuit controls the pressure chambers of the knife-edged ring piston for stripping/pushing operations, while the other circuit controls the pressure chambers of the counterstay piston for ejection operations. This allows independent adjustment of stripping/pushing forces and ejection forces according to different material and product requirements, significantly improving adaptability while maintaining manageable system complexity through modular design.
3Force
If high mass pistons are used to generate sufficient stripping and ejection forces, then the required force is achieved, but undesirable impacts and oil consumption increase
Solution Approach 1:
By segmenting the piston system into two separate units with independent hydraulic control, each piston can be optimized for its specific function. The knife-edged ring piston generates stripping/pushing forces while the counterstay piston generates ejection forces. This allows each piston to have reduced mass compared to a single combined piston, as each only needs to generate its specific required force. Independent hydraulic control further reduces oil consumption by precisely controlling when and how much fluid is supplied to each pressure chamber, eliminating the need for high mass to generate sufficient force.
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 enables independent adjustment of stripping/pushing and ejection forces, increasing speed and reducing oil consumption, while simplifying the hydraulic circuit and reducing costs.
Implementation Method 1
a hydraulic system for supplying the pressure chambers disposed in the top and base with the hydraulic fluid, the fluid being adjusted to a predetermined working pressure by way of a central control system
Data Source
AI summary
In an apparatus and a method for stripping/pushing out a punched grid and for ejecting a blanked part from a die in a precision blanking press, the force of stripping/pushing out and ejection can be adjusted independent of the knife-edged ring force and the counterstay counteracting force while reducing the mass of the knife-edged ring and counterstay pistons, increasing the stripping/pushing and ejection speeds, and at the same time simplifying the hydraulic circuit.