Explosive Forming Ignition Mechanism Wave Breaker
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Solution Overview
Problem
Existing explosive forming devices suffer from damage to the ignition mechanism due to high mechanical stress from detonation waves, leading to a short service life.
Innovation Solution
Incorporating a wave breaker in the propagation path of the detonation wave to reduce its energy, which can be arranged between the ignition location and the ignition chamber outlet, or on the forming tool, to protect the ignition mechanism and extend its service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the detonation wave is allowed to propagate freely through the ignition chamber, then the explosion can develop sufficiently to form the work piece, but the ignition mechanism gets damaged by the high mechanical stress from the reflected detonation wave
Solution Approach 1:
A wave breaker is introduced as an intermediary component in the propagation path of the detonation wave. This wave breaker absorbs and dissipates the reflected detonation wave energy, protecting the ignition mechanism from mechanical damage while allowing the primary detonation wave to pass through and form the work piece. The wave breaker acts as a mediator that selectively attenuates harmful reflected waves without significantly impeding the useful forming energy.
Solution Approach 2:
The wave breaker converts the harmful reflected detonation wave into beneficial effects by dissipating its energy through controlled mechanisms such as porous structures, baffles, or absorptive materials. The reflected wave that would otherwise damage the ignition mechanism is transformed into a energy dissipation process that protects the system, turning a harmful mechanical stress into a protective function.
2Reliability
If the wave breaker is placed closer to the ignition location, then the ignition mechanism is better protected, but the detonation wave has less space to develop before reaching the forming tool
Solution Approach 1:
The wave breaker is designed with spatially varying properties, such as gradient porous structures or progressively denser baffles, that allow it to be positioned closer to the ignition location while still providing adequate protection. The local quality of the wave breaker material or structure changes along its length to optimize both protection and detonation wave development, with more absorptive regions near the ignition mechanism and more permeable regions toward the forming tool.
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 wave breaker effectively reduces the energy of reflected shock waves, thereby extending the service life of the ignition mechanism while allowing the detonation wave to still form the work piece effectively.
Implementation Method 1
The wave breaker provided in the propagation path of the detonation wave reduces the energy of the detonation wave, which allows the device to be protected from high mechanical stress
Implementation Method 2
The explosion of the gas develops a detonation wave, which forms the work piece and then wanes
Data Source
AI summary
The invention relates to a device for explosive forming of workpieces, comprising an ignition chamber and an ignition mechanism, wherein an explosive agent can be ignited at an ignition location in the ignition chamber using the ignition mechanism, and an ignition chamber outlet is provided, to be improved such that the ignition mechanism has a longer service life. The aim is achieved by a device wherein an impact breaker is provided in the propagation path (37) of the detonation wave.