Replaceable Wear Surfaces for Cam Frame Assemblies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The contact surfaces of cam frame assemblies in walking systems of dragline excavators experience significant wear due to intense loads, leading to high replacement costs and reduced lifespan.
Innovation Solution
A cam frame assembly with replaceable wear surfaces, where inserts are retained within notches in the frame components, allowing for easy replacement and extending the lifespan of the cam frame assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire cam frame is replaced when wear occurs, then the walking system can be restored to full functionality, but the maintenance cost increases significantly
Solution Approach 1:
The cam frame is divided into a main frame body and separate replaceable wear surfaces ( Inserts). The wear surfaces are segmented into distinct components that can be independently replaced when worn, while the main frame structure remains in service. This segmentation allows only the worn portions to be replaced rather than the entire cam frame, significantly reducing material loss and maintenance costs.
Solution Approach 2:
The wear surfaces are designed to be discarded when worn and can be recovered/recycled. The inserts are made from wear-resistant materials that can be replaced and potentially reused or recycled, reducing the overall loss of valuable materials while maintaining system reliability.
2Reliability
If the entire cam frame is replaced when wear occurs, then full functionality is restored, but the time required for maintenance increases
Solution Approach 1:
By segmenting the cam frame into a permanent main structure and replaceable wear surfaces, the maintenance process is simplified to only replacing the worn inserts. This reduces the time required for maintenance operations compared to replacing the entire cam frame assembly.
Solution Approach 2:
The wear surfaces are extracted as separate, removable components from the main cam frame structure. This extraction allows for quick removal and replacement of only the worn portions during maintenance, minimizing downtime while restoring full functionality to the walking system.
3Duration of action of stationary object
If wear-resistant materials are used in the cam frame, then the lifespan is extended, but the manufacturing cost increases
Solution Approach 1:
The cam frame is segmented into a standard main frame (easier to manufacture) and separate wear surface inserts (where wear-resistant materials are used). This allows the expensive wear-resistant materials to be applied only where needed, rather than throughout the entire cam frame structure, balancing lifespan extension with manufacturing cost.
Solution Approach 2:
The cam frame system uses composite construction, combining standard materials for the main frame structure with wear-resistant materials for the contact surfaces. This composite approach extends the lifespan of the cam frame assembly while keeping manufacturing costs more manageable by using expensive materials only where necessary.
Data Source
AI summary
A cam frame assembly for a walking system includes a plurality of frame components. The frame components include an upper frame, a lower frame, a front guide frame, and a rear guide frame. At least one of the frame components includes a replaceable wear surface. The replaceable wear surface is an insert retained within a notch in the frame component.