Adjustable Induction Coil Assembly for Uniform Tool Holder Heating
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Solution Overview
Problem
Conventional induction coil units are unable to heat tool holders homogeneously due to fixed axial lengths and diameters, leading to inefficient heating of unused portions of the sleeve section.
Innovation Solution
An induction coil unit with two concentric coil units and magnetic flux concentrator assemblies that can be adjusted axially, allowing for selective positioning and locking to accommodate varying sleeve section lengths and diameters, ensuring even heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional induction coil unit with fixed axial length is used, then the coil assembly can be manufactured with simple structure, but the heating uniformity of the sleeve section deteriorates because unused portions are also heated
Solution Approach 1:
The coil assembly is divided into multiple independent coil sections (first coil section and second coil section) with different axial lengths. Each coil section can be independently adjusted along the axial direction, allowing selective heating of different portions of the sleeve section. This segmentation enables precise control over which areas are heated while avoiding unnecessary heating of unused portions.
Solution Approach 2:
The coil sections are made adjustable rather than fixed, allowing dynamic repositioning along the axial direction. The first and second coil sections can be moved to different axial positions to adapt to various sleeve lengths and heating requirements, transforming a static structure into a dynamic, adaptable system.
2Adaptability or versatility
If the coil assembly has predetermined constant axial length, then the device structure is simplified, but the adaptability to different tool holder sizes deteriorates
Solution Approach 1:
The coil assembly incorporates adjustable coil sections that can be repositioned axially to match different sleeve lengths. This dynamic adjustment capability allows the same device to adapt to various tool holder sizes without requiring multiple specialized coil assemblies.
Solution Approach 2:
The induction heating device is designed with adjustable coil sections that enable a single device to handle multiple different sleeve lengths and configurations. This multi-functionality eliminates the need for separate specialized equipment for each sleeve size, improving versatility while maintaining reasonable structural complexity.
3Productivity
If magnetic flux concentrator assembly is added to improve heating focus, then the heating efficiency is improved, but the device complexity increases
Solution Approach 1:
Magnetic flux concentrator assemblies are introduced as intermediary components between the coil sections and the sleeve section. These concentrators focus and direct the magnetic flux generated by the coil sections onto the specific heating zones, improving heating efficiency and energy utilization while maintaining a modular structure that doesn't excessively increase overall device complexity.
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 adjustable design allows for uniform heating of the sleeve section, improving heating efficiency and simplifying the handling and operation of the induction coil unit by enabling precise alignment and focusing of the magnetic flux.
Implementation Method 1
The coil assembly is connected to a high frequency AC generator and induces Eddy currents in the metal sleeve section, heating said sleeve section
Implementation Method 2
induces Eddy currents in the metal sleeve section, heating said sleeve section
Implementation Method 3
induces Eddy currents in the metal sleeve section, heating said sleeve section
Implementation Method 4
con concentrator elements, made from magnetically soft, substantially electrically non conductive material like ferrite or similar are disposed, which direct the magnetic flux generated by the coil assembly onto the sleeve section
Data Source
AI summary
The induction coil unit for heating a sleeve section of a tool holder holding the shaft of a rotation tool in a receiver opening in press fit comprises two coil units, whose distance can be changed selectively through at least one slanted surface cam assembly. A magnetic flux concentrator assembly with several concentrator elements distributed in circumferential direction is associated with the coil unit adjacent to the free end of the sleeve section. The width of a pass through opening defined by the concentrator elements for the tool shaft is also changeable through a control cam, to which the concentrator elements are coupled through a slanted surface cam assembly. The two slanted surface cam assemblies are coupled amongst each other in a useful manner in order to simplify the operation of the unit.