Cemented Carbide Tile Fastening in Composite Casting
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Solution Overview
Problem
The existing methods for fastening cemented carbide tiles in moulds during composite product casting are unreliable and prone to misplacement, leading to potential flushing by liquid metal and reduced yield and quality of the final product.
Innovation Solution
The method involves preparing a mould with cemented carbide tiles having through holes or recesses and using fastening elements with a first and second end section and an elongated body to secure the tiles, ensuring stable fastening by protruding parts into the mould material, thereby reducing the risk of misplacement and improving the casting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fastening methods (nails, bent pins, chicken wire, glue) are used to secure cemented carbide tiles in the mould, then the tiles can be attached to the mould surface, but the fastening is unreliable and prone to misplacement during pouring
Solution Approach 1:
The fastening element is divided into distinct functional segments: a first end section that engages with the cemented carbide tile (through enlarged cross-section or recess fitting), an elongated body for insertion, and a second end section that anchors in the mould material. This segmentation allows each part to perform its specific function optimally, ensuring reliable fastening.
Solution Approach 2:
Through holes or recesses are pre-formed in the cemented carbide tiles before the fastening process. This preliminary action enables the fastening elements to be securely inserted and anchored, preventing misplacement during pouring while maintaining a relatively simple overall structure.
2Reliability
If fastening elements are inserted through through holes in cemented carbide tiles, then stable fastening is achieved, but the risk of misplacement during pouring increases if fastening is poor
Solution Approach 1:
The fastening elements are designed with enlarged first end sections that engage with the tile edges or recesses, creating a mechanical interlock that prevents tile displacement before the harmful effect of liquid metal flushing can occur. This preliminary mechanical securing cushions against the potential harmful effect during pouring.
Solution Approach 2:
The through holes in the cemented carbide tiles, which could potentially allow liquid metal to penetrate and cause flushing, are instead utilized as channels for inserting the fastening elements. The holes serve a dual purpose: they accommodate the fastening mechanism while the secured tiles prevent flushing, converting a potential harm into a beneficial fastening feature.
3Ease of manufacture
If multiple fastening methods are used to secure tiles, then attachment is achieved, but the process becomes complex and potentially unstable
Solution Approach 1:
The fastening element is designed as a universal component that can be used with both through holes and recesses in cemented carbide tiles. The same basic fastening element structure adapts to different tile configurations, simplifying the manufacturing process while maintaining reliable and stable fastening through its multi-functional design.
Data Source
AI summary
A method of producing a composite product having cemented carbide tiles embedded in a metal surface thereof, a cemented carbide tile suitable for use in the method and a composite product including such cemented carbide tiles is provided. A mould for casting the product is prepared. Cemented carbide tiles having through holes or recesses are placed at desired surfaces of the mould and secured to the desired surfaces of the mould by fastening elements, such as nails or pins, such that at least part of an elongated body of each respective fastening element protrudes out from respective openings of each through hole or recess facing the mould surface and into the material of the mould to secure the respective cemented carbide tiles in place. Molten metal is poured into the mould to cast the composite product, the casting of which is removed after solidification.