Composite Contact Wheel for Cylindrical Grinding
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Solution Overview
Problem
Existing contact wheels for cylindrical grinding, whether elastomeric or metal, face challenges in maintaining precise control and consistency during grinding processes, leading to compromised dimensioning tolerances and unwanted vibrations.
Innovation Solution
A composite contact wheel with a polymer and reinforcing fiber composition, providing a substantially uniform hardness and homogeneous structure, which supports abrasive belts and allows for precise control and vibration damping, while being easy to true and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If elastomeric coated contact wheels are used, then friction is increased, but control precision and dimensioning tolerances are compromised
Solution Approach 1:
The contact wheel uses a composite structure combining a metallic hub with an elastomeric coating layer. The metallic hub provides structural rigidity and control precision, while the elastomeric coating provides increased friction. This composite approach resolves the contradiction by combining materials with complementary properties.
2Measurement precision
If metal contact wheels are used, then control precision is improved, but vibration and harmonics are generated
Solution Approach 1:
The composite structure with elastomeric coating on metallic hub dampens vibrations and harmonics generated during grinding operations, while the metallic hub maintains control precision. The elastomeric layer acts as a vibration isolator.
3Measurement precision
If metal contact wheels are used, then control precision is improved, but dressing difficulty increases
Solution Approach 1:
The elastomeric coating on the metallic hub provides a surface that is easier to dress and true compared to solid metal contact wheels, while maintaining the control precision benefits of the metallic core structure.
4Reliability
If bonded grinding wheels are used, then grinding performance is maintained, but constant maintenance and wheel trueing are required
Solution Approach 1:
The elastomeric coated contact wheel with abrasive belt provides self-maintaining properties where the abrasive belt can be easily replaced and the elastomeric surface naturally conforms to the workpiece, reducing the need for frequent wheel trueing and maintenance operations.
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 composite contact wheel ensures precise control and reduced vibrations during grinding, maintaining consistent performance and improving dimensioning tolerances, comparable to bonded wheels but with the ease of use and cost-effectiveness of coated belts.
Implementation Method 1
Metal contact wheels are also known to create unwanted vibration and harmonics during the grinding process
Implementation Method 2
When bonded wheel grinding systems are retrofitted to accept abrasive belts, the contact wheel is frequently used to both drive the abrasive belt and to urge the coated abrasive belt surface against the workpiece. While the elastomeric coating provides increased friction (compared to metal)
Data Source
AI summary
A composite contact wheel, grinding assemblies comprising the same, and methods of abrading cylindrical workpieces using coated abrasive belts.