Multilayer Gear Grindstone With Elastic Abrasive Cloth Layer
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Solution Overview
Problem
Conventional multilayer grindstones experience instability and accuracy issues at high rotational speeds due to centrifugal force, requiring complex control to maintain desired grinding depth and leading to suboptimal gear tooth surface finishing.
Innovation Solution
A multilayer grindstone design featuring a first thread-shaped vitrified grindstone and a second thread-shaped fibrous-substrate laminated grindstone with abrasive cloths, where the second grindstone has higher elasticity and finer abrasive grains, allowing it to absorb displacement influences without affecting gear tooth surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second thread-shaped grindstone is constituted by a resinoid grindstone with relatively high elasticity to absorb displacement during high-speed rotation, then the grindstone can maintain contact with the gear tooth surface, but the grinding force becomes excessively high causing instability and accuracy degradation
Solution Approach 1:
The invention changes the material parameters of the second grindstone by using a fibrous substrate (organic or inorganic fibers) instead of conventional resinoid material. This fiber-reinforced composite structure modifies the elastic modulus and grinding force characteristics, allowing the grindstone to absorb displacement while maintaining stable grinding accuracy at high rotational speeds.
Solution Approach 2:
The invention employs a composite material structure where fibers (organic such as glass fiber, or inorganic such as metal fiber) are embedded in a binder matrix. This composite construction provides both the elasticity needed to absorb centrifugal displacement and the controlled grinding force necessary for precision machining, resolving the contradiction between reliability and manufacturing precision.
2Reliability
If the second thread-shaped grindstone has high elasticity to absorb displacement during high-speed rotation, then contact with gear tooth surface is maintained, but complex control is required to compensate for displacement and maintain desired grinding depth
Solution Approach 1:
The fibrous-substrate grindstone structure inherently absorbs displacement during high-speed rotation through its material properties, eliminating the need for external control systems to compensate for centrifugal force effects. The grindstone self-regulates its position through the elastic deformation of the fiber-reinforced structure.
3Reliability
If the second thread-shaped grindstone uses resinoid material with high elasticity, then it can absorb displacement during rotation, but grinding swarf length increases and grinding burn may occur
Solution Approach 1:
The invention changes the thermal and mechanical parameters of the grindstone material by using fiber-reinforced composites instead of conventional resinoid materials. This modification improves heat dissipation characteristics and reduces grinding force, thereby preventing grinding burn and reducing swarf accumulation while maintaining operational stability.
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 stabilizes grinding accuracy and roughness at high rotational speeds, reducing grinding swarf length and preventing grinding burn, while eliminating the need for additional machining operations and complex control systems.
Implementation Method 1
the second thread-shaped grindstone is constituted by abrasive cloths that are laminated on each other, and has a higher elasticity than the first thread-shaped grindstone
Implementation Method 2
each of the abrasive cloths includes adhesive in which synthetic resin and abrasive grains are mixed
Data Source
AI summary
A gear-grinding multilayer grindstone includes: a first thread-shaped grindstone and a second thread-shaped grindstone that are fixed to each other, such that the first and second thread-shaped grindstones have a rotational axis that is common to the first and second thread-shaped grindstones; and a thread-shaped groove that is provided in a first outer circumferential surface of the first thread-shaped grindstone and a second outer circumferential surface of the second thread-shaped grindstone. The thread-shaped groove extends continuously over the first outer circumferential surface and the second outer circumferential surface. The second thread-shaped grindstone is constituted by abrasive cloths that are laminated on each other, and has a higher elasticity than the first thread-shaped grindstone.