Electroplating Anode Assembly With Positioning Slots And Tabs
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Solution Overview
Problem
Existing electroplating methods for turbine airfoils face challenges such as undesirable coating thickness variations, blistered platinum deposits, and damage due to positioning errors and short circuits in the assembly of electroplating anode assemblies, leading to inefficiencies and equipment damage.
Innovation Solution
The use of weldable structural anode members with positioning slots and tabs allows for precise positioning and faster assembly of electroplating anode assemblies, ensuring accurate alignment and reducing fabrication time, thereby improving the electroplating process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional electroplating anode assemblies are used without positioning slots and tabs, then assembly flexibility is maintained, but positioning precision deteriorates leading to coating thickness variations and defective deposits
Solution Approach 1:
The anode assembly is segmented into multiple structural anode members (first, second, third plate members) that can be separately positioned and assembled. Each member has specific positioning features (slots and tabs) that enable precise relative positioning when joined together, resolving the contradiction between positioning precision and structural complexity.
Solution Approach 2:
Positioning slots and tabs serve as intermediary features between anode members. These features act as mechanical mediators that ensure precise alignment and positioning during assembly, eliminating positioning errors while adding minimal structural complexity through standardized positioning elements.
2Productivity
If manual assembly methods are used for electroplating anode assemblies, then flexibility is maintained, but assembly time increases significantly
Solution Approach 1:
Positioning slots and tabs are pre-formed on the anode members before final assembly. This preliminary preparation of positioning features enables rapid alignment and joining operations, reducing overall assembly time from 40 hours to 12 hours by eliminating time-consuming alignment procedures during the assembly process.
3Manufacturing precision
If imprecise positioning of anode members is used, then assembly simplicity is maintained, but coating quality deteriorates with thickness variations and blisters
Solution Approach 1:
The anode assembly is divided into multiple plate members with dedicated positioning slots and tabs. This segmentation allows each member to be precisely positioned relative to others through the positioning features, ensuring uniform coating thickness while maintaining reasonable assembly simplicity through modular construction.
4Reliability
If traditional welding procedures without positioning features are used, then process simplicity is maintained, but assembly reliability deteriorates with misalignment and short circuits
Solution Approach 1:
Positioning slots and tabs serve as intermediary alignment features that ensure precise positioning of anode members before welding. These features act as mechanical guides that prevent misalignment and short circuits during the welding process, improving reliability without requiring complex welding fixtures or procedures.
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 approach enables precise positioning and faster assembly of electroplating anode assemblies, resulting in consistent coating thickness and reduced risk of damage, significantly reducing fabrication time from 40 hours to 12 hours and improving the overall efficiency of the electroplating process.
Implementation Method 1
The first structural anode member includes a positioning slot. The second structural anode member includes a positioning tab disposable in the positioning slot.
Implementation Method 2
TIG (Tungsten-Inert-Gas) butt welded together first, second and third structural anode titanium (or titanium alloy) sheet-metal plate members
Implementation Method 3
the parts are first platinum electroplated. It is known to use the electrolyte Pt(NH3)4HPO4 for platinum electroplating turbine airfoils
Data Source
AI summary
Apparatus for electroplating a workpiece includes an unassembled electroplating anode assembly having weldable first and second structural anode members. The first structural anode member includes a positioning slot. The second structural anode member includes a positioning tab disposable in the positioning slot. A method for making an electroplating anode assembly includes obtaining an electroplating-anode-assembly first structural anode member having a positioning slot and obtaining an electroplating-anode-assembly second structural anode member having a positioning tab. The method also includes locating the positioning tab in the positioning slot and welding together the first and second structural anode members.