Grinding Wheel Reinforcement via Polyurethane Pore Filling
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Solution Overview
Problem
Existing grinding wheels face limitations in achieving higher cutting speeds due to safety constraints, and current reinforcement methods, such as multi-layered nets, are costly and inefficient.
Innovation Solution
A grinding wheel with a bore reinforced using a 2-component polyurethane potting compound poured into its pores, forming a ring lining and reinforcing layer, allowing adjustable thickness and penetration depth through varying spin speed, amount, fluidity, and curing time of the compound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a multi-layered net is used to reinforce the grinding wheel, then the explosion speed and cutting speed can be increased, but the manufacturing cost increases significantly
Solution Approach 1:
The patent utilizes the porous structure of the grinding wheel to directly receive and bond the potting compound, eliminating the need for complex multi-layered net reinforcements. The potting compound penetrates into the pores of the grinding wheel material, creating a strong bond that reinforces the wheel at the bore region without requiring additional layered structures, thereby reducing manufacturing complexity and cost.
Solution Approach 2:
The patent creates a composite structure by combining the grinding wheel material with a potting compound that has different bonding properties. This composite approach allows the potting compound to penetrate and bond with the porous grinding wheel material, providing reinforcement without the complexity of multi-layered nets. The composite material strategy enables cost-effective reinforcement while achieving the desired strength improvement.
2Reliability
If the reinforcement thickness is increased to allow higher cutting speeds, then safety and explosion speed improve, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent employs a dynamic manufacturing process where the grinding wheel rotates during the application of the potting compound. This rotation enables controlled penetration of the compound into the pores at varying depths, allowing the reinforcement thickness to be adjusted dynamically based on process parameters rather than requiring complex multi-layered structures. The dynamic application process simplifies manufacturing while enabling precise control over reinforcement thickness for safety requirements.
Solution Approach 2:
The patent controls reinforcement thickness by changing process parameters such as rotation speed, amount of potting compound applied, and curing time, rather than changing the structural complexity. By adjusting these parameters, the desired reinforcement thickness can be achieved in a single layer, avoiding the need for multiple layers and simplifying the manufacturing process while meeting safety requirements.
3Productivity
If the grinding wheel is reinforced to enable higher cutting speeds, then productivity improves, but the manufacturing cost increases due to complex reinforcement structures
Solution Approach 1:
The patent extracts the essential reinforcement function from complex multi-layered net structures and implements it through a simpler potting compound application process. By removing the unnecessary complexity of multiple layers and nets, the solution maintains the reinforcement benefit while significantly reducing manufacturing cost and complexity, thereby improving productivity without the associated cost penalty.
Solution Approach 2:
The patent replaces expensive, complex multi-layered net reinforcements with a simpler, more cost-effective potting compound application. This approach uses a single application of bonding material that provides the necessary reinforcement without requiring costly multi-layered structures, making the manufacturing process more economical while achieving the same productivity improvement.
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 method securely joins the reinforcing material with the grinding wheel, enabling increased cutting speeds while reducing manufacturing costs and ensuring safety, with the option to further reinforce with metal components for even higher speeds.
Implementation Method 1
the grinding wheel is set rotating, preferably with a horizontally aligned axis of rotation and at, for example 400 rpm (revolutions per minute), and a specific amount of potting compound is poured into the bore
Data Source
AI summary
Method for reinforcing a grinding wheel, preferably for grinding gears. By means of at least one plastic that is poured in, both a ring lining a bore of the grinding wheel and a reinforcing layer are formed in the grinding wheel pores. The plastic that is poured in preferably consists of a potting compound, used in the raw state, made of a 2-component polyurethane system. In order to produce the reinforcement, the grinding wheel is set rotating, i.e., rotated, and, at the same time, a specific quantity of potting compound is poured into the bore. An increase in the explosion speed during operation of the grinding wheel is thereby made possible.