Excavation Cutting Discs for Foreign Body Removal
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Solution Overview
Problem
Excavation machines with rotating cutters face challenges when encountering foreign bodies like cables or tie rods during trench digging, which can block or damage the cutting head, requiring additional machines for removal and complicating operations.
Innovation Solution
An excavation machine design with a cutting head featuring two pairs of rotating drums and cutting discs positioned in the same plane, allowing for effective cutting of cables or tie rods without changing machines, using tungsten carbide or diamond powder for high mechanical resistance and a suction port to manage cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If excavation machines with rotating cutters are used for trench digging, then productivity is improved, but foreign bodies like cables or tie rods can block or damage the cutting head
Solution Approach 1:
The cutting head is designed to perform multiple functions: it can both dig trenches using rotating drums with cutters and cut foreign bodies like cables or tie rods using cutting discs. This multi-functionality eliminates the need for separate machines, allowing the same equipment to handle both excavation and foreign body removal operations, thereby maintaining productivity while improving reliability.
2Reliability
If separate machines are used to remove foreign bodies, then cutting head damage is prevented, but device complexity and operation time increase
Solution Approach 1:
The patent merges the functions of trench digging and foreign body cutting into a single integrated cutting head assembly. The cutting discs are mounted on the same drums that perform excavation, combining what would traditionally require separate machines into one unified system. This reduces device complexity and operational complexity while maintaining protective capabilities.
3Adaptability or versatility
If cutting discs are added to the cutting head, then foreign body cutting capability is improved, but device complexity increases
Solution Approach 1:
The cutting head is segmented into distinct functional components: rotating drums with cutters for excavation and mounting means for cutting discs for foreign body removal. This segmentation allows each component to be optimized for its specific function while maintaining overall system integration. The cutting discs can be mounted or removed as needed, providing versatility without permanently increasing structural 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
Enables safe and efficient trench digging by allowing in-situ cutting of foreign bodies, reducing equipment damage and operation time by integrating cutting discs directly on the machine, eliminating the need for separate machines to handle cables or tie rods.
Implementation Method 1
the first and second cutting discs respectively have a diameter greater than or equal to that of said first and second drums... allowing in-situ cutting of foreign bodies
Implementation Method 2
a suction port 30, arranged at the lower end of the frame between the two rotating cutting assemblies 26 and 28, to allow cuttings to be brought up
Data Source
AI summary
The application relates to an excavation machine including a cutting head with a first drum and a second drum positioned side by side, in proximity to one another, and configured to turn respectively around a first and a second axis of rotation, the first drum and the second drum including, according to their respective axis of rotation, a proximal end connected to the cutting head, and a distal end opposite to the proximal end. The application also relates to a cutting disc for an excavation machine of this type, as well as a corresponding cutting method.