High-Pressure Torsion Heating Zone for Larger Workpiece Processing
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Solution Overview
Problem
High-pressure torsion techniques are limited to workpieces with specific geometric constraints, such as disks with thicknesses of 1 millimeter or less, and scaling these workpieces is difficult, restricting practical applications and preventing successful incremental processing of elongated workpieces.
Innovation Solution
A high-pressure-torsion apparatus with a working axis, first and second anvils, and an annular body containing recirculating convective chillers and a heater, allowing for selective heating and cooling of workpieces, enabling processing of larger dimensions by confining deformation to a narrow heated layer and providing precise control over processing parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high-pressure torsion is applied to workpieces with specific geometric constraints (disks with thickness of 1 millimeter or less), then the technique can be successfully implemented, but the workpieces have limited practical applications and scaling is difficult
Solution Approach 1:
The patent applies local quality by heating only a narrow portion of the workpiece at a time rather than heating the entire workpiece. This localized heating approach allows the high-pressure torsion apparatus to process elongated workpieces of various sizes by moving the heated zone along the workpiece length, thereby increasing adaptability without requiring a completely different apparatus design for each workpiece size
Solution Approach 2:
The patent segments the processing approach by dividing the elongated workpiece into multiple sections that are processed sequentially. The apparatus processes one narrow heated layer at a time and moves along the workpiece, enabling incremental processing of large workpieces without requiring the entire workpiece to fit within the apparatus at once, thus resolving the contradiction between workpiece size range and apparatus complexity
2Length of moving object
If incremental processing of elongated workpieces is attempted, then larger workpiece dimensions may be achieved, but successful implementation has not been realized
Solution Approach 1:
The patent ensures continuity of useful action by maintaining constant heating and processing conditions as the apparatus moves along the workpiece. The narrow heated layer is continuously processed with high-pressure torsion while the apparatus translates along the workpiece length, ensuring reliable incremental processing of elongated workpieces without interruption or loss of processing quality
Solution Approach 2:
The patent applies dynamics by making the heating zone and processing apparatus movable along the workpiece rather than stationary. This dynamic approach allows the apparatus to systematically process the entire length of elongated workpieces in a controlled manner, ensuring reliable implementation of incremental processing by maintaining consistent processing parameters throughout the movement
3Manufacturing precision
If high pressure and high torque are applied to process workpieces, then grain structure control is achieved, but the requirements limit the technique to workpieces with specific geometric constraints
Solution Approach 1:
The patent applies local quality by concentrating the high pressure and high torque application to a narrow heated zone rather than applying it to the entire workpiece. This localized approach maintains the necessary grain structure control in the processed region while allowing the rest of the workpiece to have different geometries, thereby expanding the range of acceptable workpiece geometries without sacrificing manufacturing 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
Enables the processing of larger workpieces with precise control over material microstructures, resulting in ultrafine grained materials with higher strength and ductility, while reducing the complexity and cost of the apparatus.
Implementation Method 1
The first recirculating convective chiller is configured to be thermally convectively coupled with a workpiece. The first recirculating convective chiller is configured to selectively cool the workpiece.
Implementation Method 2
The heater is translatable between the first anvil and the second anvil along the working axis and is configured to selectively heat the workpiece.
Data Source
AI summary
Described is a method of modifying material properties of a workpiece using a high-pressure-torsion apparatus, comprising a working axis, a first anvil, a second anvil, and an annular body, comprising a first recirculating convective chiller, a second recirculating convective chiller, and a heater, positioned between the first recirculating convective chiller and the second recirculating convective chiller along the working axis. The method comprises compressing the workpiece along a central axis of the workpiece and. simultaneously with compressing the workpiece along the central axis, twisting the workpiece about the central axis. The method further comprises. while compressing the workpiece along the central axis and twisting the workpiece about the central axis, translating the annular body along the working, axis of the high-pressure-torsion apparatus, collinear with the central axis of the workpiece, and heating the workpiece with the heater.