High-Frequency Vibration Machine Tool Inductive Coil Extraction
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Solution Overview
Problem
Conventional high-frequency vibration machining technologies face issues with electrode wear in contact-type systems and increased manufacturing costs and reduced convenience in tool holder changes due to the internal installation of inductive coils in non-contact systems.
Innovation Solution
A machine tool design with an inductive coil installed in the main shaft, using contact-type electrodes to transmit power and signals to the high-frequency vibration tool holder, reducing electrode wear and externalizing the inductive coil to lower tool holder manufacturing costs and enhance replaceability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inductive coils are installed inside the tool holder for non-contact electricity supply, then electrode wear is avoided, but the manufacturing cost of the tool holder is increased and the convenience of changing the tool holder is decreased
Solution Approach 1:
The patent extracts the inductive coil from the tool holder and relocates it to the main shaft structure. Specifically, the stationary coil portion is fixed on the main body of the main shaft structure, while the rotating coil portion is fixed on the rotating shaft. This extraction eliminates the need to install complex inductive coils inside the tool holder, thereby reducing manufacturing costs and improving tool holder replaceability while maintaining non-contact electricity supply functionality.
2Reliability
If inductive coils are installed inside the tool holder for non-contact electricity supply, then electrode wear is avoided, but the convenience of changing the tool holder is decreased
Solution Approach 1:
By extracting the inductive coil system from the tool holder and installing it in the main shaft structure, the patent simplifies the tool holder design to a basic clamping structure. This makes tool holder changes faster and more convenient while the main shaft structure remains fixed and equipped with the complete inductive coil system, ensuring continuous non-contact electricity supply capability.
3Device complexity
If contact type electrodes are used to transmit electric power, then the structure is simpler, but the electrodes are more easily worn out
Solution Approach 1:
The patent replaces the mechanical contact-type electricity supply system with a non-contact electromagnetic induction system. The stationary coil portion and rotating coil portion generate electromagnetic fields to transmit electric power wirelessly to the tool holder, eliminating physical contact and thus preventing electrode wear while maintaining relatively simple structure.
4Ease of manufacture
If the inductive coil is arranged outside the tool holder in the main shaft, then the manufacturing cost of the tool holder is reduced and the convenience of changing the tool holder is increased, but the transmission rate from the stationary coil portion to the rotating coil portion must be optimized
Solution Approach 1:
The patent optimizes the electromagnetic transmission efficiency by carefully designing the spatial relationship between the stationary coil portion and rotating coil portion. The coils are positioned with specific spacing and alignment to maximize magnetic coupling, ensuring high transmission efficiency despite the external arrangement. This local optimization of the electromagnetic field interaction compensates for the increased distance compared to internal coil installation.
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 prevents electrode wear, reduces tool holder manufacturing costs, and improves machining stability and efficiency by allowing easier tool holder changes and effective high-frequency vibration transmission.
Implementation Method 1
a stationary coil portion including a stationary ring and at least one primary coil, which are both hollow shaped and are coaxially stacked and fixed on an upper portion of the rotating shaft... a rotating coil portion including a rotating ring and at least one secondary coil... the at least one secondary coil of the rotating coil portion is induced to generate an electric power/signal
Data Source
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AI summary
A machine tool (1) of high-frequency vibration is provided. A main shaft structure (100) of the machine tool (1) comprises a rotating shaft (120), the end of which is provided with a tool holder chuck (130) for fixing a tool holder (200); the upper portion of which is provided with a rotating coil portion (150); the main shaft structure (100) is correspondingly provided with a stationary coil portion (140); and the tool holder (200) is provided with a high-frequency vibration module (240). By non-contact coils (140, 150), an external electric power/signal can be transmitted into the high-frequency vibration module (240) to avoid a wear phenomenon in a contact-rotating electrode. Because the inductive coil (140, 150) is arranged outside of the tool holder (200), the manufacturing cost of the tool holder (200) is reduced, and the convenience of changing the tool holder (200) is increased. Moreover, the machining stability and efficiency of the tool holder (200) are improved by a control method of sensing/feedback signals with wireless transmission.