Punched Steel Plate Edge Heating With a Non-Contact Coil
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Solution Overview
Problem
Existing methods for reducing residual strain in press-formed High Tensile Strength Steel, such as direct contact heating electrodes, lead to electrode wear and unstable current values, or non-contact methods that extend the heating range beyond the punched end.
Innovation Solution
A forming and processing method involving a non-contact heating coil positioned along the end face of the punched end to generate an induced electromotive force, allowing localized heating of the steel plate without electrode wear, with the coil's diameter larger than the steel plate thickness and adjustable angle for optimal heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating electrode is brought into direct contact with the punched end for heating, then heating effectiveness is improved, but the heating electrode is worn and current value becomes unstable
Solution Approach 1:
The patent introduces an intermediary medium (heating fluid such as hot air or liquid) to transfer heat to the punched end without direct contact between the heating source and the workpiece. This mediator allows effective heating while avoiding electrode wear and current instability issues
Solution Approach 2:
The patent replaces the mechanical contact-based heating electrode system with a fluid-based heating system. Instead of using solid electrodes that physically touch the punched end, the system uses circulating heated fluid to transfer thermal energy, eliminating mechanical wear and contact-related instability
2Duration of action of stationary object
If a non-contact heating method is used to avoid electrode wear, then electrode durability is improved, but heating range extends beyond the punched end
Solution Approach 1:
The patent applies heating locally to the punched end by directing heated fluid specifically to the residual strain area. The heating fluid is circulated through channels or nozzles positioned to target only the punched end region, ensuring localized heating without affecting surrounding areas
Solution Approach 2:
The heating system is segmented into separate heating zones with independent fluid circulation paths. This allows precise control of heating range by adjusting individual zone parameters, preventing heat spread to areas beyond the punched end while maintaining durability through non-contact heating
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 method stabilizes the current value of the heating coil and ensures localized heating, maintaining the strength of the steel plate while improving heating efficiency and preventing unnecessary softening.
Implementation Method 1
applying a current to the heating coil to generate an induced electromotive force in the steel plate, thereby heating the end face
Data Source
AI summary
Only a punched end is locally heated while a current value of a heating electrode is stabilized during heating. A forming and processing method includes punching a steel plate, and disposing a heating coil so as to face an end face of a punched end punched in the punching in a non-contact manner along the end face of the punched end and applying a current to the heating coil to generate an induced electromotive force in the steel plate, thereby heating the end face.