Electromagnetic Setting Tool Coil Layout for Precise Piston Drive
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Solution Overview
Problem
Existing setting tools for driving fasteners into substrates lack efficiency and quality, particularly in generating effective magnetic fields for piston movement, which affects the accuracy and speed of fastener insertion.
Innovation Solution
A hand-held setting device with a stator and working piston, featuring a drive system that includes a piston coil and stator coils oriented transversely and parallel to each other, allowing for controlled magnetic field generation through rapid capacitor discharge, and utilizing soft magnetic materials to enhance magnetic field strength and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional drive with axial coil orientation is used, then the structure is simple, but the magnetic field generation efficiency is insufficient affecting piston movement quality
Solution Approach 1:
The invention transitions from axial coil orientation (parallel to working axis) to transverse coil orientation (perpendicular to working axis). This dimensional change in coil arrangement enables more effective magnetic field generation for piston acceleration while maintaining structural feasibility
Solution Approach 2:
The invention employs soft magnetic materials with specific permeability characteristics (μr ≥ 1.05) for the piston body and/or stator. These composite material properties enhance magnetic field concentration and strength, improving piston movement precision without requiring complex mechanical structures
2Speed
If rapid capacitor discharge is used to generate magnetic field, then piston acceleration speed is improved, but energy loss increases
Solution Approach 1:
The invention optimizes the permeability parameter of soft magnetic materials (μr ≥ 1.05) to enhance magnetic field generation efficiency during capacitor discharge. This parameter optimization allows for more efficient energy conversion, reducing energy losses while maintaining high piston acceleration speeds
Solution Approach 2:
The drive system utilizes periodic capacitor discharge cycles to accelerate the piston. By controlling the discharge timing and frequency, the system achieves repeated high-speed piston movements while managing energy consumption and losses across multiple operational cycles
3Power
If transverse piston coil orientation is used, then magnetic field generation efficiency is improved, but coil winding complexity increases
Solution Approach 1:
The invention adopts transverse orientation of the piston coil axis perpendicular to the working axis, creating a dimensional reconfiguration that enables more effective magnetic field generation. This orientation provides better magnetic coupling between stator and piston coils, enhancing power output despite increased winding 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 device achieves high efficiency and quality in driving fasteners into substrates by generating aligned or opposing magnetic fields, ensuring precise and rapid piston movement, thereby improving the setting process.
Implementation Method 1
the drive has a piston coil arranged on the working piston and a first stator coil arranged on the stator, wherein the first stator coil and/or the piston coil is intended to have current flowing through it and to generate a magnetic field
Implementation Method 2
current flowing through it and to generate a magnetic field to accelerate the working piston
Implementation Method 3
the piston coil and the first stator coil can be supplied with current in the same direction to generate mutually aligned magnetic fields and accelerate the piston coil axis toward the first stator coil axis
Implementation Method 4
the piston coil and the first stator coil can be supplied with current in opposite directions to generate mutually opposing magnetic fields and accelerate the piston coil axis away from the first stator coil axis
Data Source
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AI summary
The invention relates to a working tool for working an underlying surface, in particular a hand-held working tool, in particular a setting tool for driving securing elements into the underlying surface, having a stator and a working piston, which is designed to move relative to the stator along a working axis, and additionally having a drive, which is designed to drive the working piston from a starting position onto the underlying surface along the working axis. The drive has a piston coil, which is arranged on the working piston, and a first stator coil, which is arranged on the stator, wherein the piston coil has a piston coil axis which is oriented transversely to the working axis, in particular perpendicularly thereto.