Battery-Powered Brazing Device With Thermal Management
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Solution Overview
Problem
Conventional brazing methods on railway tracks face issues with heat-induced martensite formation causing cracks, inconsistent current supply due to battery power variations, and reduced battery capacity at low temperatures, leading to irregular electrical connections.
Innovation Solution
A battery-powered brazing system with insulated DC source batteries maintained at optimal temperature, using digital components to control current intensity and duration, ensuring consistent amperage and energy supply through a heat-emitting sheet and temperature monitoring system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high power battery cells are used to provide sufficient amperages at normal temperatures, then brazing power is improved, but battery capacity decreases at very low temperatures
Solution Approach 1:
The patent applies parameter changes by heating the battery cells to maintain them at an optimal temperature range. The system includes a temperature sensor that monitors cell temperature and a control unit that activates heating when temperature drops below a threshold, ensuring batteries maintain sufficient capacity and power output even in cold environmental conditions.
2Ease of operation
If battery temperature varies with environmental conditions, then portability is improved, but current intensity consistency deteriorates
Solution Approach 1:
The patent implements feedback control through a temperature sensor that continuously monitors battery cell temperature and a control unit that adjusts heating activation based on this feedback. This closed-loop system ensures current intensity consistency by maintaining optimal battery temperature despite environmental variations, while preserving the portability of the handheld brazing device.
3Productivity
If strong heat is released under the brazing site to melt solder, then brazing speed is improved, but martensite formation and crack formation increase
Solution Approach 1:
The patent applies local quality by concentrating heat precisely at the brazing site through focused electrical current delivery, while the battery system maintains optimal temperature to control the thermal profile. This localized heating approach enables rapid brazing speed while minimizing excessive heat diffusion that would cause martensite formation and cracking in the surrounding material.
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 system provides predictable and consistent brazing results across varying conditions, maintaining constant current and energy levels, reducing crack formation and improving electrical connection reliability.
Implementation Method 1
A special brazing pin with a metal solder (melting temperature is less than 700° C.) is melt down in a hole of a cable lug and creates a brazed connection
Implementation Method 2
applying a welding current through an electrode pressed to a metal surface of a work piece and separating the electrode from the metal surface to form a welding arc
Implementation Method 3
The cells are arranged on a heat emitting sheet in a cabinet. Preferably the cabinet is heat insulated.
Data Source
AI summary
A method for controlling a brazing process, including the steps of applying a welding current through an electrode (52) pressed to a metal surface (83) of a workpiece to form a welding arc. Further steps are continuously measuring the welding current and the welding time, continuously determining supplied energy on the basis of the welding current and the welding time, digitally switching current supplied from batteries of a DC source (10) and to maintain a substantially constant welding current, interrupting the supply of welding current when a predetermined amount of energy has been supplied and supplying heat to batteries when a temperature of the batteries is below a predetermined value. The apparatus comprises a control module (31) with a central unit (26)and a power control unit (28) wherein the central unit (26) and the control unit (28) are operatively connected for continuously measuring the welding current, a switched circuit module (12) producing a substantially constant welding current of a predetermined value and a first temperature transducer (36) provided in the vicinity of batteries included in the DC source (10). A heat transfer means (34; 70) is activated when the temperature of the batteries is below a predetermined value.