Magnet Projection Welding Electrode With Turbulent Cooling Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Water-cooled electrodes experience insufficient cooling and temperature demagnetization of permanent magnets due to low water pressure and flow rate, leading to overheating and reduced attractive force.
Innovation Solution
A magnet-equipped projection welding electrode design with a heat insulating guide sleeve having a minor and major diameter hole, where the cooling water passage is annular and positioned in the outer peripheral portion, and a depth dimension smaller than the heat insulating portion's thickness, promoting turbulent water flow and effective heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling water passage has a large sectional area, then the cooling capacity is improved, but the water pressure and flow rate become insufficient
Solution Approach 1:
The invention changes the geometric parameters of the cooling water passage, specifically setting the depth dimension to be smaller than the thickness dimension of the heat insulating portion. This parameter optimization enables turbulent flow to occur at lower water flow rates, achieving effective cooling without requiring high water pressure or flow rate from the water supply system.
2Device complexity
If the heat insulating guide sleeve has a thin wall, then the structural compactness is improved, but the permanent magnet experiences temperature demagnetization
Solution Approach 1:
The invention optimizes the thickness parameter of the heat insulating guide sleeve wall, setting it to be greater than the depth of the cooling water passage. This parameter configuration creates sufficient thermal insulation barrier to protect the permanent magnet from demagnetization while maintaining relatively compact structural dimensions.
Solution Approach 2:
The heat insulating guide sleeve acts as an intermediary thermal barrier between the cooling water passage and the permanent magnet. By positioning the cooling water passage deeper and making the sleeve wall sufficiently thick, the sleeve mediates heat transfer to prevent excessive heating of the permanent magnet while still allowing compact overall design.
3Temperature
If the cooling water passage depth is large, then the cooling coverage is improved, but the water flow becomes laminar and ineffective
Solution Approach 1:
The invention optimizes the depth dimension of the cooling water passage by setting it smaller than the thickness of the heat insulating portion. This parameter change ensures that the cooling water flow velocity remains sufficient to maintain turbulent flow regime, achieving effective cooling coverage without requiring excessively high flow velocities.
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 design enhances cooling efficiency by ensuring turbulent water flow over the electrode's surface, preventing overheating and demagnetization of the permanent magnet, maintaining a stable attractive force even under conditions of low water pressure or flow rate.
Implementation Method 1
promoting turbulent water flow and effective heat dissipation
Implementation Method 2
heat insulating guide sleeve made of an insulation material
Data Source
AI summary
A main body and an end cover are made of metal. A major diameter hole and a minor diameter hole that communicates with a through hole of the end cover are provided in a heat insulating guide sleeve inserted into the main body. A cooling water passage is formed in the heat insulating guide sleeve. A portion of the heat insulating guide sleeve located at an inner side of the cooling water passage serves as a heat insulating portion. A container of a permanent magnet is slidably inserted into the heat insulating portion. A magnetic force transmission member is slidably inserted into the minor diameter hole. The permanent magnet, the heat insulating portion, and the cooling water passage are arranged in a diameter direction of the main body. A depth dimension of the cooling water passage is smaller than a thickness dimension of the heat insulating portion.