Welding Sensor Housing With Gas-Redirecting Heat Shield
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Solution Overview
Problem
Existing sensor devices for welding can disrupt the welding process by allowing gases discharged from their outlets to mix with the welding area, potentially contaminating the weld and affecting its quality.
Innovation Solution
A sensor device with a shielding portion that redirects and cools gases discharged from its outlet, preventing them from reaching the welding area by inclining the shielding portion opposite to the flow direction of the gas, thus reducing the influence of these gases on the weld.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a gas flow channel discharges gas from the sensor device, then fume generated during welding can be prevented from entering the housing case, but the discharged gas may flow toward the welding area and mix into the resulting welded portion
Solution Approach 1:
The patent converts the potentially harmful discharged gas into a beneficial cooling medium by directing it to flow over the shielding portion. The gas that would otherwise contaminate the weld is now used to cool the shielding portion, reducing radiation heat while being diverted away from the welding area through the inclined shielding structure
Solution Approach 2:
The shielding portion is inclined at a specific angle relative to the gas flow direction, creating a three-dimensional flow path that redirects the gas away from the welding area. This angular configuration changes the flow dimension, directing gas laterally along the shielding portion rather than straight toward the work pieces
2Reliability
If shielding gas is supplied from the welding torch to cover the arc region, then reactions between molten metal and active gas can be prevented, but the flow of shielding gas may be disturbed by the discharged gas from the sensor device
Solution Approach 1:
The patent extracts the discharged gas flow away from the welding area by using the inclined shielding portion to redirect it laterally. This separation prevents the discharged gas from interfering with the shielding gas flow around the arc, maintaining the integrity of the protective atmosphere
Solution Approach 2:
The shielding portion acts as an intermediary structure that intercepts the discharged gas and redirects it away from the welding area. This intermediate element prevents direct interaction between the discharged gas and the shielding gas, eliminating flow disturbance
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 configuration minimizes the impact of discharged gases on the welding process, ensuring stable and uncontaminated welds by directing them away from the welding area and using them to cool the shielding portion.
Implementation Method 1
a shielding portion adapted to shield radiation heat directed toward the housing portion among radiation heat generated while the work pieces are welded together
Implementation Method 2
the shielding portion is inclined with respect to a flow direction of a gas passing through an outlet port of the gas flow channel such that the gas discharged from the outlet port is blown to the shielding portion
Data Source
AI summary
A gas, which flows between a welding device and work pieces while the work pieces are welded together, has large influence on the welding. A sensor device includes a sensor unit and a container that includes a housing case (i.e., housing portion) and a shielding member (i.e., shielding portion). The shielding member is attached to the housing case, and shields radiation heat directed toward the lower surface of the housing case among radiation heat generated while the work pieces W are welded together. The shielding member is inclined with respect to a flow direction of a gas passing through an outlet port for detection of a second gas flow channel so that the gas discharged from the outlet port for detection is blown to the shielding member and thus flows to a side opposite to the side where the work pieces W are to be welded together.