Hydraulic Punch Press Layout for Small Workpiece Forming
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Solution Overview
Problem
Existing workpiece processing apparatuses using hydraulic pressure are complex and unsuitable for processing small objects, such as connectors in electronic devices, due to their large size and intricate power devices.
Innovation Solution
A workpiece processing apparatus with a simplified mechanism that utilizes hydraulic pressure, featuring a base member with a hydraulic chamber, a movable slider, and a punch, where the hydraulic chamber extends in parallel and is controlled by a relief valve to manage pressure, allowing for efficient processing of small objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a complex power device and hydraulic-pressure generation mechanism are used, then large objects can be processed, but the apparatus becomes unsuitable for small objects due to size and complexity
Solution Approach 1:
The hydraulic chamber is divided into two separate chambers: a workpiece processing chamber and a hydraulic-pressure generation chamber. This segmentation allows the apparatus to be more compact while maintaining the necessary functions for both small and large object processing.
Solution Approach 2:
The piston is partially received in the hydraulic-pressure generation chamber, creating a nested configuration where the piston moves within the chamber. This nesting reduces the overall apparatus size while preserving the hydraulic pressure generation capability needed for versatile object processing.
2Device complexity
If a simplified mechanism is used, then the apparatus size is reduced and it becomes suitable for small objects, but generating high hydraulic pressure becomes more difficult
Solution Approach 1:
The invention uses hydraulic pressure generated by the piston moving within the hydraulic-pressure generation chamber to achieve high pressure with a simple mechanism. The liquid in the closed hydraulic chamber transmits the force from the piston to generate the necessary hydraulic pressure for workpiece processing.
Solution Approach 2:
The relief valve controls the hydraulic pressure by adjusting the opening pressure parameter. This allows the system to generate high hydraulic pressure when needed while maintaining a simple mechanism structure, as the pressure level is controlled by a adjustable parameter rather than complex control systems.
3Productivity
If high hydraulic pressure is generated, then small objects can be processed efficiently, but pressure control becomes more challenging
Solution Approach 1:
The relief valve provides pressure feedback control by automatically opening when the hydraulic pressure exceeds a predetermined level. This feedback mechanism ensures reliable pressure control during efficient processing of small objects, preventing over-pressurization while maintaining high productivity.
Solution Approach 2:
The relief valve is automatically operated by the hydraulic pressure itself without requiring external control. When pressure reaches the predetermined level, the valve self-activates to release pressure, providing automatic pressure control that maintains both efficiency and reliability.
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
The apparatus achieves efficient processing of small objects by generating high hydraulic pressure with a simple mechanism, suitable for shaping small components like connector shells, while maintaining control over pressure levels.
Implementation Method 1
The piston receives a downward pressing force from the slider in a course of movement of the slider from the upper position to the lower position. When the slider is moved from the upper position toward the lower position under a state where the hydraulic chamber is filled with the liquid and the workpiece is placed on the workpiece processing chamber, the punch is moved downward and presses the workpiece into the workpiece processing chamber, and the piston is moved downward in accordance with the pressing force and increases hydraulic pressure of the liquid.
Implementation Method 2
The hydraulic chamber is provided with a relief valve. The relief valve controls the hydraulic pressure so that the hydraulic pressure does not exceed a predetermined value.
Data Source
AI summary
A workpiece processing apparatus comprises a base member, a slider located above the base member and a punch projecting downward from the slider. The base member is formed with a hydraulic chamber fillable with liquid. The hydraulic chamber has a workpiece processing chamber and a hydraulic-pressure generation chamber which are coupled together. Each of the workpiece processing chamber and the hydraulic-pressure generation chamber extends in the upper-lower direction and opens upward. The base member comprises a piston which is partially received in the hydraulic-pressure generation chamber. When the slider is moved downward, the punch is moved downward and presses the workpiece into the workpiece processing chamber, and the piston receives a downward force and is moved downward. The thus-moved piston increases hydraulic pressure of the liquid.