Segmented Screwing Tool Supporting Elements Reduce Installation Torque
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Solution Overview
Problem
Existing screwing tools are prone to breakage due to excessive torque when installing in tool holders, especially when dealing with hard and brittle materials, as they lack effective support and centering mechanisms, leading to high friction and stress.
Innovation Solution
The screwing tool and tool holder design incorporates radially outwardly projecting supporting elements and inwardly projecting mounting elements, respectively, which are spaced at distances to reduce friction and torque, enhance damping, and ensure stable centering through conical and cylindrical contact surfaces, thereby matching the calculated optimum torque and preventing excessive stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screwing tool is installed in the tool holder with conventional continuous contact support sections, then the tool is well supported and centered, but high friction losses occur leading to excessive torque and risk of tool breakage
Solution Approach 1:
The continuous contact surfaces in the second support section are segmented into discrete supporting elements (protrusions) spaced at specific intervals. This segmentation reduces the total contact area between tool and holder, thereby reducing friction losses and the torque required for installation, while still providing adequate support and centering through the distributed arrangement of these elements.
2Reliability
If the screwing tool uses conventional mounting sections, then the tool is securely installed, but the torque required exceeds the optimum torque calculated for screw engagement
Solution Approach 1:
The mounting sections are segmented into discrete supporting elements rather than continuous contact surfaces. This reduces the frictional resistance during installation, allowing the torque applied to closely match the optimum torque calculated for screw engagement, preventing excessive stress on the tool.
Solution Approach 2:
The parameters of the supporting elements (number, spacing, dimensions) are optimized to achieve the right balance between support stability and friction reduction, ensuring the installation torque matches the calculated optimum torque for the screw threads.
3Stability of the object's composition
If the screwing tool has continuous contact support surfaces, then the tool is well centered, but vibrations are not effectively damped
Solution Approach 1:
The continuous support surface is divided into discrete supporting elements spaced at specific intervals. This segmentation creates elastic deformation zones between the elements that effectively dampen vibrations during operation, while the distributed arrangement maintains accurate centering of the tool in the holder.
Solution Approach 2:
The supporting elements are designed with elastic properties, allowing them to deform under vibrational loads and return to their original position, thereby damping vibrations. The elastic material absorbs vibrational energy while maintaining the geometric precision needed for accurate centering.
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 design reduces the required torque for installation, minimizes stress on the screwing tool, and effectively dampens vibrations, ensuring secure and precise mounting while preventing tool holder deformation.
Implementation Method 1
These supporting elements have the effect of reducing friction losses due to smaller contact surfaces
Implementation Method 2
the supporting elements that are disposed a distance from each other cause the vibrations to be more effectively damped due to the higher elasticity of the individual outwardly projecting supporting elements
Data Source
AI summary
A screwing tool includes a tool head and a tool shaft having an external thread. A first support section is disposed between the tool head and the external thread, and a second support section is disposed between the external thread and a free end of the tool shaft. The second support section has radially outwardly projecting supporting elements that are disposed at a distance from each other in the circumferential direction.