Extrusion Press Container Sealing Force Control
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Solution Overview
Problem
Conventional extrusion presses face issues with non-uniform product thickness and shape due to varying extrusion forces, leading to increased energy consumption and the risk of 'bursting' phenomena, as the container sealing force is not consistently maintained throughout the process.
Innovation Solution
An extrusion press with a control system that detects hydraulic pressure deviations and adjusts the container sealing force by reducing or increasing it to maintain a constant reference pressure, using a combination of hydraulic and electric servomotor-driven mechanisms to ensure consistent product displacement and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container sealing force is increased to prevent bursting, then the reliability of the sealing is improved, but the energy consumption increases due to higher load pressure on the main cylinder device
Solution Approach 1:
The container sealing force is made dynamic rather than static. The pressing means adjusts the sealing force in real-time based on the extrusion force variations, applying higher force when needed (at the start of extrusion) and reducing it when extrusion progresses, thereby maintaining reliability while minimizing energy consumption throughout the process
Solution Approach 2:
The control system uses feedback from the extrusion process to automatically adjust the container sealing force. By detecting the extrusion force and comparing it with reference values, the system dynamically modifies the sealing force to maintain optimal sealing without excessive energy consumption
2Manufacturing precision
If the container sealing force is kept constant throughout extrusion, then the manufacturing precision of the product is improved, but the energy consumption increases due to maintaining high load pressure during the entire process
Solution Approach 1:
The system dynamically adjusts the container sealing force during extrusion based on real-time feedback, rather than maintaining a constant high force. This allows the sealing force to be optimized at each stage of extrusion, maintaining product uniformity while reducing overall energy consumption
Solution Approach 2:
The pressing force parameter is changed dynamically during the extrusion process. The control means adjusts this parameter based on the current extrusion stage and detected forces, allowing optimal sealing at each moment without sustaining maximum pressure throughout, thereby reducing energy consumption while maintaining precision
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 results in uniform product thickness and shape, improved energy efficiency, and reduced risk of bursting by maintaining a constant container sealing force without increasing the main cylinder's load pressure, thereby enhancing overall process efficiency and product quality.
Implementation Method 1
a hydraulic pressure of the main cylinder device is detected
Implementation Method 2
the extrusion press comprises a control means, which is capable of sending an output to the container moving means to reduce a container sealing force when the deviation is plus with respect to the reference pressure, or to increase the container sealing force when the deviation is minus with respect to the reference pressure
Data Source
AI summary
An extrusion press includes a container mover that moves a container at an end platen and molding a product by extruding a billet loaded in the container from a die by a stem driven by a main cylinder device, wherein the extrusion press includes a deflection amount detector that detects a deflection amount of the die; a deflection amount of the die during extrusion is detected; a deviation between the detected deflection amount and a reference deflection amount of the die set in advance is mathematically processed; and the extrusion press includes a controller that sends an output to the container mover to reduce a container sealing force when the deviation is minus, or increase the container sealing force when the deviation is plus so that a container sealing force corresponding to the reference deflection amount acts on an end surface of the die.