Screwable Reinforcement Slip-Reducing Agent
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Solution Overview
Problem
Screw reinforcements in construction face issues with tolerance-reducing effects during screwing, leading to thread misalignment and slip, which disrupts the structural stability of concrete structures due to reduced torque effectiveness and increased risk of sagging or crookedness.
Innovation Solution
Incorporating a slip-reducing agent between the internal and external thread elements, which can be made of metals, plastics, or silicones, to reduce friction and ensure optimal thread alignment, thereby minimizing tolerance-reducing effects and maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tolerance gap is maintained between internal and external threads during screwing, then the threads can be assembled, but thread misalignment and slip occur under load
Solution Approach 1:
A slip-reducing agent is introduced as an intermediary substance between the internal and external threads. This agent fills the tolerance gap and reduces friction, preventing thread slip and misalignment under load while still allowing the threads to be assembled. The agent acts as a mediator that resolves the contradiction between maintaining assembly ease and ensuring alignment stability.
2Strength
If torque is applied to screw the bolt into the sleeve, then the connection is formed, but friction at the sleeve head dissipates torque reducing effectiveness
Solution Approach 1:
The slip-reducing agent serves as an intermediary that reduces friction between the threaded surfaces. By lowering the friction coefficient, more of the applied torque is transmitted effectively to create the screw connection, rather than being dissipated as frictional heat at the sleeve head and thread interfaces.
3Manufacturing precision
If thread contamination or defects occur, then assembly becomes difficult, but maintaining tight tolerances exacerbates the problem
Solution Approach 1:
The slip-reducing agent acts as a compensating intermediary that fills gaps and lubricates contaminated or defective thread surfaces. This allows the assembly process to proceed smoothly even when manufacturing tolerances are not perfectly tight or when contamination is present, effectively decoupling the relationship between manufacturing precision and assembly ease.
4Reliability
If thread slip occurs under load, then structural stability is compromised, but increasing friction prevents optimal thread contact
Solution Approach 1:
The slip-reducing agent changes the friction parameter at the thread interface. By optimizing the friction coefficient through the use of lubricating agents, the system achieves both sufficient friction to prevent slip and low enough friction to allow homogeneous contact between threads under load, resolving the contradiction between structural stability and force distribution.
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
The slip-reducing agent ensures that the threads are optimally aligned, reducing slip and maintaining structural stability, even under load, by transmitting torque effectively and preventing sagging or bending of concrete components.
Implementation Method 1
at least one slip-reducing agent (9) is arranged between an end face (17) of the internally threaded element (4) and an end surface (18) of a shoulder (19), which delimits the externally threaded section (3') of the externally threaded element (2). The slip-reducing agent (9) comprises at least one sliding surface, by which the friction between the internally threaded element (4) and the externally threaded element (2) can be reduced at the end of the screwing-in process.
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 2C
AI summary
The earth-finding device relates to a screwable reinforcement (1) comprising at least one external thread element (2) with at least one external thread (6) and at least one internal thread element (2') with at least one internal thread (5). The external thread(s) (6) can be arranged in or are arranged in the internal thread(s) (5) by screwing. A tolerance gap (7) remains between the external thread (6) and the internal thread (5) during and/or after screwing. At least one slip-reducing means (9) is arranged between an end face (17) of the internal thread element (2') and an annular stop surface (18) of the external thread element (2), which comprises at least one sliding surface, thereby reducing the friction between the internal thread element (2') and the external thread element (2) at the end of the screwing process.