Multi-material bearing cage via additive manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current additive manufacturing techniques are limited in producing high-quality bearings due to insufficient material requirements, leading to labor-intensive and costly methods for applying specific materials locally, which are often inaccurate and inefficient.
Innovation Solution
A cage for bearings is designed using additive manufacturing, where a first material with different properties is printed locally in pockets surrounding rolling elements, allowing for precise application of specialized materials only where needed, reducing labor and costs, and enabling optimized surface roughness and lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additive manufacturing is used to produce bearing cages, then design freedom and geometric complexity are improved, but material properties are insufficient for high-quality bearings
Solution Approach 1:
The patent applies different materials to different regions of the cage: a first material with high strength and wear resistance is used in pockets and contact areas, while a second material is used for the remaining cage structure. This local differentiation allows the cage to meet high-quality bearing requirements in critical areas while maintaining design freedom in non-critical areas.
Solution Approach 2:
The patent combines two different materials to create a composite cage structure. The first material provides superior mechanical properties for load-bearing and wear-resistant regions, while the second material provides adequate properties for structural support. This composite approach enables the cage to achieve both design freedom and sufficient material properties for high-quality bearings.
2Length of moving object
If conventional coating methods are used to apply specific materials locally, then material differentiation is achieved, but labor intensity and cost increase significantly
Solution Approach 1:
The patent merges the cage manufacturing process with the material application process by using additive manufacturing to directly deposit different materials in different regions during a single production cycle. This eliminates the need for separate coating operations, masking steps, and post-processing, thereby dramatically reducing labor intensity while achieving precise material differentiation.
Solution Approach 2:
The patent performs material differentiation during the initial additive manufacturing process rather than as a subsequent coating operation. By pre-planning and executing material placement in the pockets and contact areas during cage fabrication, the process eliminates later labor-intensive masking and coating steps.
3Length of moving object
If conventional coating methods are used to apply specific materials locally, then material application is achieved, but accuracy and precision are reduced
Solution Approach 1:
The additive manufacturing process enables precise control over material placement at the local level. The first material is deposited only in the pockets and contact areas where it is needed, with exact dimensional control achieved through digital modeling and layer-by-layer fabrication. This eliminates the imprecision associated with conventional masking and coating methods.
4Length of moving object
If conventional coating processes are used, then material application is achieved, but temperature requirements and deposition chamber needs increase complexity
Solution Approach 1:
The patent combines material deposition and cage fabrication into a single additive manufacturing process, eliminating the need for separate deposition chambers and temperature-controlled coating equipment. The additive manufacturing system integrates all necessary functions in one device, thereby reducing overall process equipment requirements and 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 reduces friction, wear, and lubricant usage, improving bearing efficiency and environmental impact while allowing for cost-effective production of complex geometries and functional graded interfaces.
Implementation Method 1
Additive manufacturing or more commonly called 3D printing is a known production technique in which a three-dimensional solid object is generated from a digital model. The process of additive manufacturing starts with generating the digital model via any known digital modeling methods, such as using a CAD program. Next, the digital model is divided into slices in which each slice indicates for this layer of the digital model where the printed material should be located. The individual slices are sequentially fed into an additive manufacturing tool or 3D printer which deposits the material according to the individual slices and as such generates the complete three-dimensional solid object layer by layer.
Implementation Method 2
The first material is a first printed material being printed via an additive manufacturing process and having different properties compared to the second material, wherein the first material is printed in the pockets where, in use, the rolling elements at least occasionally contact the pockets
Data Source
AI summary
The invention provides a cage for a bearing. The invention further provides the bearing and a method of producing the cage. The cage includes a plurality of pockets at least partially surrounding the rolling elements. The cage further comprises a first material and a second material. The first material is a first printed material printed via an additive manufacturing process that has different properties compared to the second material. The first material is printed in the pockets at a position where, the rolling elements at least occasionally contact the pockets. Using such first printed material allows application of the first printed material at a location where it is needed.