Grinding External Rings of Roller Bearings Using Asymmetric Radial Forces
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Solution Overview
Problem
Existing grinding equipment for external rings of roller bearings in rolling mills introduces systematic oscillation errors due to axial-symmetric radial forces, leading to variations in the distance between the contact point and the pin's center, which affects the quality and productivity of the lamination process.
Innovation Solution
The equipment applies radial forces through two contrast rolls that simulate the loading conditions of the rolling mill, ensuring the external ring is preloaded and rotated similarly to its operational state, minimizing oscillations and maintaining the desired radial clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If axial-symmetric radial forces are applied during grinding, then the external ring can be securely held and ground, but systematic oscillation errors are introduced due to variations in distance between contact point and pin center
Solution Approach 1:
The patent applies asymmetric radial forces through two contrast rolls positioned at different locations on the external ring. Instead of using axial-symmetric forces that cause oscillations, the asymmetric force distribution simulates actual rolling mill operating conditions and eliminates systematic oscillation errors during grinding, while maintaining secure holding of the external ring.
2Ease of manufacture
If the external ring is ground without simulating rolling mill loading conditions, then the grinding process is simpler, but oscillation errors affect the quality of the lamination process
Solution Approach 1:
The patent applies preliminary action by preloading the external ring with radial forces through contrast rolls before the grinding operation begins. This preliminary loading simulates the actual rolling mill operating conditions, ensuring that the external ring is in the same deformation state during grinding as it will be during lamination, thereby eliminating oscillation errors and improving lamination quality.
3Device complexity
If radial clearance is not maintained during grinding, then the grinding equipment is simpler, but alignment and quality of the lamination process deteriorate
Solution Approach 1:
The patent changes the parameter of radial clearance by maintaining a specific radial gap between the contrast rolls and the external ring during grinding. This radial clearance parameter is optimized to simulate actual operating conditions while maintaining proper alignment, thereby improving lamination quality without excessive equipment complexity.
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 ensures that the bearing is subjected to the same loading and deformation conditions as in the rolling mill, reducing oscillations and improving the quality and productivity of the lamination process by maintaining consistent radial clearance and alignment.
Implementation Method 1
The equipment applies radial forces through two contrast rolls that simulate the loading conditions of the rolling mill, ensuring the external ring is preloaded and rotated similarly to its operational state
Implementation Method 2
a supporting pin 12 on which the assembled bearing 11 is mounted
Implementation Method 3
the essential phase of the maintenance of the bearing consists in the grinding of the outer surface of the external ring in order to restore its essential characteristics, such as the shape and roughness
Data Source
AI summary
Equipment for grinding external rings of roller bearings includes a supporting pin of a bearing to be ground, a stop extending outwardly from the supporting pin for axial positioning of a side of the bearing, a sliding flange on the pin which can be positioned to rest on the other side of the bearing, a clamping nut which can be firmly positioned on a complementary portion of the pin, skids preloaded by springs situated on opposite sides of the bearing, and a guiding element on the opposite side of the stop, which receives a structure carrying a pair of contrast rolls movable to be engaged with the external ring of the bearing creating a radial force thereon, which can be predetermined and regulated by a maneuvering element to eliminate the clearance of the bearing in the radial direction. A machine for housing equipment of the above specified type.