Expansion Anchor Bolt Break-Off Disassembly to Minimize Substrate Damage
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Solution Overview
Problem
Existing anchor disassembly methods are complex, often requiring sharp cutting tools and can damage substrates, especially when disassembling expansion anchors, which complicates maintenance and reinstallation processes.
Innovation Solution
Applying a high torque to the anchor bolt until it breaks, allowing the anchor to be disassembled into two fragments, with the rear fragment removed and the front fragment left in the hole, reducing stress on the substrate and enabling easy reanchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sharp cutting tools are used to cut the head of the expansion anchor off the anchor bolt, then the add-on part can be disassembled, but the substrate and add-on part are damaged and stress is increased
Solution Approach 1:
Instead of cutting the anchor bolt head off to remove the add-on part, the invention applies torque in the opposite direction to twist and break the anchor bolt itself. This inverts the traditional disassembly approach by destroying the anchor bolt rather than cutting around it, thereby avoiding substrate damage and add-on part stress while achieving complete disassembly
Solution Approach 2:
The invention changes the physical state and mechanical properties of the anchor bolt by applying high torque that exceeds its strength limit. This parameter change causes the anchor bolt to twist and break at a predetermined weak point, transforming it from a load-bearing component into separable fragments that can be easily removed without affecting the substrate or add-on part
2Ease of operation
If the anchor bolt is twisted off by applying high torque until it breaks, then disassembly is simple and substrate damage is minimized, but the anchor bolt must be designed with a predetermined weak point
Solution Approach 1:
The anchor bolt is segmented into two functional parts: a strong main body for anchoring and a predetermined weak point for controlled breaking. This segmentation allows the anchor bolt to serve dual purposes - providing strong anchoring during installation and enabling easy disassembly by breaking at the weak point when torque is applied
Solution Approach 2:
The predetermined weak point is prepared in advance during manufacturing, creating a controlled vulnerability in the anchor bolt. This preliminary action ensures that when torque is applied during disassembly, the anchor bolt will break at the predetermined location rather than unpredictably elsewhere, simplifying the disassembly process
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 method provides a simple, reliable, and versatile disassembly process that minimizes substrate damage and facilitates easy reanchoring, eliminating the need for sharp cutting tools and reducing stress on the add-on part.
Implementation Method 1
a torque is applied to the bolt of the anchor that is anchored in the hole and the anchor bolt is stressed until it breaks
Implementation Method 2
the anchor bolt is stressed until it breaks, wherein the anchor is divided into a front anchor bolt fragment and a separate rear anchor bolt fragment
Data Source
AI summary
A disassembly method for an anchor that is anchored in a hole and that has an anchor bolt is provided, whereby, during the disassembly procedure, a torque is applied to the bolt of the anchor that is anchored in the hole and, in this process, the anchor bolt is stressed until it breaks. An anchor which has a head and whose bolt has an engaging profile so that a torque can be applied to the anchor bolt is also provided.