Electromagnetic Working Piston Drive With Segmented Coil Acceleration
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Solution Overview
Problem
Existing setting tools for driving fastening elements into substrates lack efficiency and consistency in their operation, particularly in ensuring high-quality fastening processes.
Innovation Solution
A hand-held setting tool with a drive system comprising a stator and working piston, featuring multiple coils and a capacitor for generating magnetic fields to accelerate the piston, where the coils are oriented and connected to generate alternating and opposing magnetic forces, enhancing the piston's movement and energy transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single coil system is used to drive the working piston, then the device complexity is low, but the acceleration efficiency and setting quality are insufficient
Solution Approach 1:
The single coil system is segmented into multiple coils (first piston coil, second piston coil, first stator coil, second stator coil) arranged at different positions along the working axis. Each coil segment contributes to accelerating the working piston at different stages of its movement, thereby improving overall acceleration efficiency while maintaining a manageable system structure.
Solution Approach 2:
The coil system is designed to be dynamically activated based on the position of the working piston. By selectively energizing different coil combinations depending on piston position, the system optimizes acceleration at each stage of the piston's travel, improving setting quality without requiring all coils to be active simultaneously.
2Use of energy by moving object
If multiple coils are used to improve acceleration efficiency, then the energy transfer is optimized, but the device complexity increases
Solution Approach 1:
The multiple coils are activated in a periodic sequence corresponding to the position of the working piston. As the piston moves along the working axis, different coils are energized in succession to provide continuous and optimized energy transfer throughout the piston's travel distance, maximizing energy efficiency while avoiding the need for all coils to operate simultaneously.
Solution Approach 2:
The coil system is designed to provide continuous useful action throughout the entire stroke of the working piston. By arranging coils at different positions and activating them in sequence, the system ensures that energy transfer is maintained continuously from the starting position through to the substrate, eliminating idle periods and optimizing overall energy utilization.
3Reliability
If opposing magnetic fields are generated by supplying current in opposite directions, then the piston acceleration control is improved, but the control system complexity increases
Solution Approach 1:
Instead of using complex mechanical or electronic control mechanisms to regulate piston acceleration, the system inverts the approach by using opposing magnetic fields generated through opposite current directions in the coils. This allows precise control of piston acceleration and deceleration by simply reversing current flow, achieving reliable control with relatively simple control logic.
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 tool achieves improved efficiency and setting quality by optimizing the magnetic field generation and energy transfer, allowing for effective acceleration of the working piston and reduced mechanical loads, while ensuring precise control and efficient energy distribution.
Implementation Method 1
the first piston coil and the first stator coil can be supplied with current in the same direction in order to generate magnetic fields in the same direction and to accelerate the first piston coil into the first stator coil
Implementation Method 2
the first piston coil and the first stator coil can be supplied with current in opposite directions in order to generate opposing magnetic fields and to accelerate the first piston coil out of the first stator coil
Implementation Method 3
the drive has an electrical capacitor, the first stator coil and/or the first piston coil being electrically connectable to the electrical capacitor in order during rapid discharge of the electrical capacitor to be flowed through by current and generate the magnetic field
Data Source
AI summary
A tool for working a substrate, the tool having a stator and a working piston, which is intended to move relative to the stator along a working axis, also having a drive, which is intended to drive the working piston from a starting position along the working axis to the substrate, the drive comprising a first piston coil arranged on the working piston and a first stator coil arranged on the stator, and the first piston coil being intended to enter the first stator coil during a movement of the working piston relative to the stator along the working axis.