Magneto-Pneumatic Striker for Chiseling Energy Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional machine tools for chiseling lack efficient mechanisms to precisely control the striking process, leading to inefficiencies in energy transfer and accuracy due to variations in the position of the die during impact.
Innovation Solution
A magneto-pneumatic striking mechanism with a primary actuator driven by magnetic coils and an air spring, where the air spring's ventilation opening is strategically positioned to minimize air exchange until impact, and a radially magnetized ring magnet creates a controlled magnetic field to phase-oppositionally adjust magnetic field strength within the coils, ensuring consistent energy transfer and high field strength near the impact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ventilation opening of the air spring is kept open to allow air exchange, then the air spring can maintain pressure equilibrium with the environment, but air leaks continuously during the striker's movement reducing energy efficiency
Solution Approach 1:
The ventilation opening is pre-positioned at a specific height that corresponds to the striker's impact position. Before impact occurs, the opening remains closed to maintain pressure. Only when the striker reaches the predetermined impact position does the opening become accessible, allowing air exchange at the precise moment needed for pressure equilibrium without continuous leakage.
Solution Approach 2:
The striker itself acts as an intermediary element that controls the ventilation opening. As the striker moves upward, its lateral surface automatically blocks the opening during the compression phase. At impact position, the striker's movement allows the opening to be exposed, enabling air exchange without requiring an additional valve mechanism.
2Quantity of substance
If the ventilation opening is positioned low in the air spring, then air exchange with the environment is maximized, but the air spring cannot maintain pressure during striker compression
Solution Approach 1:
The ventilation opening is pre-positioned at a specific height that corresponds to the striker's impact position. Before impact occurs, the opening remains closed to maintain pressure. Only when the striker reaches the predetermined impact position does the opening become accessible, allowing air exchange at the precise moment needed for pressure equilibrium without continuous leakage.
3Adaptability or versatility
If the die position varies during impact, then adaptability to different working conditions is improved, but energy transfer efficiency and striking accuracy deteriorate
Solution Approach 1:
The air spring provides continuous pressure feedback to the striker throughout its movement. The pressure builds progressively as the striker compresses the air spring, ensuring that the striker maintains consistent velocity and impact force regardless of variations in die position. This pressure regulation mechanism compensates for position variations and maintains striking accuracy.
Solution Approach 2:
The air spring changes its pressure parameter dynamically during the striker's compression. As the striker moves upward and compresses the air spring, the pressure increases progressively. This dynamic pressure adjustment ensures that the striker delivers consistent impact energy even when die position varies, maintaining energy transfer efficiency across different working conditions.
4Force
If magnetic field strength is increased within the coils, then striking force is improved, but energy consumption and heat generation worsen
Solution Approach 1:
The magnetic coils are activated in periodic pulses rather than continuously. The control unit switches the coils on and off in synchronization with the striker's movement cycle, generating magnetic field impulses that propel the striker forward. This periodic activation reduces overall energy consumption while maintaining sufficient striking force through timed magnetic impulses.
Solution Approach 2:
The patent replaces traditional mechanical spring-based striking mechanisms with a magneto-pneumatic system. Instead of using mechanical energy storage and release, the system uses magnetic field generation and air spring compression to accelerate the striker. This substitution improves energy efficiency by allowing precise control of energy input through electrical switching rather than continuous mechanical tension.
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 enhances the robustness and precision of the striking mechanism by maintaining high energy transfer efficiency and tolerance to die position variations, resulting in consistent and effective chiseling performance.
Implementation Method 1
the striking mechanism has an air spring which acts on the striker in the direction of the impact
Implementation Method 2
A magneto-pneumatic striking mechanism has a primary actuator, which is arranged around the axis of movement, and sequentially includes a first magnetic coil and a second magnetic coil in the direction of impact
Implementation Method 3
The ring magnet essentially generates a magnetic field which is permanently oriented to the axis movement and runs along the radial direction, and which runs in the opposite direction within the first magnetic coil and the second magnetic coil. This asymmetry can be used to set the magnetic field strength within the two coils in phase opposition to a high and a low value. The gradient of the magnetic field strength moves the striker based on the magnetic reluctance.
Data Source
AI summary
A machine tool is disclosed. A magneto-pneumatic striking mechanism has a primary actuator arranged around an axis of movement and includes a first magnetic coil and a second magnetic coil. The striking mechanism has, on the axis of movement within the magnetic coils, a striker and a die. Furthermore, the striking mechanism has an air spring acting on the striker in a direction of impact. The air spring may be entirely or partially within the first magnetic coil. The air spring has a ventilation opening that is open to the environment if the striker is less than 10% of its stroke away from the die, and otherwise the ventilation opening is closed. An exchange of air with the environment is therefore only possible when the striker is near the die or is near the impact position.