Work Roll Plating System with Nested Tanks
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Solution Overview
Problem
The use of hexavalent chromium in chrome plating processes poses health risks to workers and is subject to regulatory limitations, and existing methods for plating work rolls require large amounts of chromic acid and manual handling, leading to safety hazards and environmental concerns.
Innovation Solution
A system comprising coaxially aligned inner and outer tanks with a reduced volume of chromic acid, temperature regulation, and automated positioning of work rolls and busbars, along with an exhaust hood and real-time amperage measurement, to minimize chromic acid usage and enhance safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional chrome plating methods are used with large tanks, then adequate plating coverage is achieved, but chromic acid consumption increases and worker safety risks increase
Solution Approach 1:
The patent implements a nested tank configuration where an inner tank is positioned inside an outer tank. The inner tank contains the chromic acid solution and work roll, while the outer tank provides structural support and contains spill risks. This nesting arrangement reduces the overall volume of chromic acid required while maintaining adequate plating coverage, directly addressing both reduced chemical consumption and improved worker safety.
Solution Approach 2:
The plating system is segmented into distinct functional zones: the inner tank for active plating, the annular space between tanks for temperature regulation, and the outer tank for containment. This segmentation allows optimized chromic acid usage in the inner tank while using the annular space for thermal management, reducing overall chemical requirements and improving operational safety.
2Ease of operation
If manual handling of work rolls and busbars is used, then equipment complexity is reduced, but worker injury risk increases
Solution Approach 1:
The patent replaces manual mechanical handling with automated positioning systems. Motors and actuators are integrated to automatically position work rolls and busbars within the plating tank, eliminating the need for workers to manually maneuver heavy equipment in hazardous environments. This substitution directly improves worker safety while accepting increased system complexity.
3Manufacturing precision
If chromic acid is used for electroplating, then surface finish quality is improved, but environmental harm increases
Solution Approach 1:
The patent implements a chromic acid recovery system where spent plating solution is collected and processed to recover usable chromic acid for reuse. This recovery process reduces the need for continuous fresh chromic acid supply, minimizing environmental discharge while maintaining consistent plating quality. The system balances manufacturing precision requirements with environmental protection through material recovery.
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
Significantly reduces chromic acid usage, enhances worker safety by automating manual handling, and allows for real-time quality control, resulting in a more environmentally friendly and efficient plating process.
Implementation Method 1
Chrome plating has been employed as a technique for plating work rolls used for forming materials such as steel or aluminum. In chrome plating, a thin layer of chromium is electroplated onto the work rolls.
Implementation Method 2
an annular space is formed between the inner tank and the outer tank, and temperature regulating fluid is disposed within the annular space
Implementation Method 3
The exhaust hood may comprise a generally ring-shaped profile having a plurality of slots formed therein to suction fumes from the inner tank.
Implementation Method 4
At least one actuator may be operatively disposed for incremental vertical positioning of a work roll within the inner tank. Further, at least one actuator may be operatively disposed for incremental horizontal positioning of a busbar adjacent to a work roll.
Data Source
AI summary
The present embodiments are directed to systems and methods for plating of work rolls. In one embodiment, a system includes an inner tank having an inner diameter dimensioned to receive a work roll, and an outer tank, wherein the inner tank is disposed coaxially within the outer tank. The inner tank and the outer tank may each include cylindrical shapes. A temperature regulating tank, positioned outside of the outer tank, may be in fluid communication with an annular space between the inner and outer tanks. An exhaust hood having a generally ring-shaped profile including a plurality of slots formed therein may suction fumes from the inner tank. An anode configuration also is disclosed, having a shunt incorporated into the anode, wherein current going to the anode passes through the shunt.