Extrusion Press Container Mantle Thermal Profile Control
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Solution Overview
Problem
Achieving thermal alignment in metal extrusion presses is challenging due to temperature variations within the container, which affect the uniformity of the billet temperature and subsequently the extruded product's shape, as heat is lost differently at various sections, leading to inefficiencies and waste.
Innovation Solution
A container with a mantle and liner equipped with individually controllable heating elements and temperature sensors, allowing for precise thermal profile control within the extrusion press, with sensors measuring vertical and horizontal temperature profiles to adjust heating accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heating methods are used in extrusion presses, then the container can be heated, but temperature uniformity across the container cannot be maintained due to heat loss variations at different sections
Solution Approach 1:
The heating system is divided into multiple independently controllable heating zones (first heating zone, second heating zone, third heating zone) along the container length. Each zone has its own heating elements and can be controlled separately to compensate for differential heat losses at different locations, achieving uniform temperature distribution despite varying thermal losses.
Solution Approach 2:
Different sections of the container are equipped with heating elements tailored to their specific thermal characteristics. The end sections with higher heat loss have dedicated heating zones, while the middle section has its own heating zone. This localized heating approach addresses the specific thermal needs of each region to maintain overall temperature uniformity.
2Manufacturing precision
If the container temperature is not uniformly controlled, then heating can be simplified, but the billet temperature uniformity deteriorates leading to product shape defects
Solution Approach 1:
Temperature sensors are installed in each heating zone to continuously monitor the temperature. The sensor signals are fed back to a control system that adjusts the heating power in each zone accordingly. This closed-loop feedback control ensures that the billet maintains uniform temperature throughout the extrusion process, preventing shape defects in the final product.
3Temperature
If multiple heating zones with individual control are implemented, then temperature uniformity can be improved, but the device complexity increases
Solution Approach 1:
The control system serves multiple heating zones simultaneously with a single integrated controller. The controller can manage all heating zones according to their respective temperature requirements, making the system multi-functional. This approach improves temperature control precision across different zones while avoiding the need for separate control devices for each zone, thereby limiting the increase in overall system complexity.
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 solution ensures uniform thermal alignment, maintaining optimal billet temperature and improving extrusion efficiency by minimizing temperature differences across the container, thus enhancing the quality and consistency of the extruded product.
Implementation Method 1
a plurality of longitudinally extending heating elements accommodated by the mantle adjacent the bore, the heating elements being individually controllable for controlling a thermal profile within the container
Implementation Method 2
a plurality of temperature sensors configured to measure the thermal profile within the container
Implementation Method 3
radiant heat lost from the bottom surface of the container rises inside the container housing, leading to an increase in temperature at the top
Implementation Method 4
conduction is the principal method of heat transfer within the container
Data Source
AI summary
A container for use in a metal extrusion press includes a mantle having an elongate axial bore therein, the bore having a first transverse axis orthogonal to a second transverse axis, and a plurality of longitudinally extending heating elements accommodated by the mantle adjacent the bore. The heating elements are individually controllable for controlling a thermal profile within the container. The container also includes a plurality of temperature sensors configured to measure the thermal profile within the container. The temperature sensors include a first temperature sensor and a second temperature sensor positioned on opposite sides of the first transverse axis, and a third temperature sensor and a fourth temperature sensor positioned on opposite sides of the second transverse axis.