Tool Holder Elastic Deformation for Fastening Frame Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fastening apparatuses experience angular deviations and joint offsets due to load-induced elastic deformation of supporting frames during joint-forming operations, degrading joint quality and increasing stress on workpieces and equipment.
Innovation Solution
The design of tool holders with controlled elastic deformation properties, including narrowed regions and varying material properties, compensates for frame spreading and offset by bending in a direction opposite to the frame's deformation, maintaining minimal angular deviations and reducing transverse forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tool holders of different lengths are used to adapt to different joint positions, then the adaptability of the fastening device is improved, but angular deviations between punch and tool axes increase due to frame deformation
Solution Approach 1:
The patent applies parameter changes by modifying the structural parameters of the tool holder, specifically introducing a narrowed region with reduced wall thickness. This geometric parameter change allows the tool holder to exhibit controlled elastic deformation under load, compensating for frame deformation and maintaining angular precision across different joint positions.
Solution Approach 2:
The patent converts the harmful effect of frame elastic deformation into a beneficial compensation mechanism. By designing the tool holder with a narrowed region that deforms elastically under load, the system uses the same load-induced deformation to counteract frame spreading, thereby maintaining alignment precision despite using different tool holder lengths for various joint positions.
2Manufacturing precision
If the frame is made more rigid to reduce angular deviations, then manufacturing precision is improved, but the complexity and weight of the apparatus increase
Solution Approach 1:
The patent extracts the deformation compensation function from the frame structure itself and relocates it to the tool holder component. Instead of making the entire frame more rigid or adding complex compensation mechanisms to the frame, the solution isolates the compensation function in the tool holder's narrowed region, simplifying the overall frame design while maintaining precision.
3Manufacturing precision
If tool holders with narrowed regions are used to compensate for frame deformation, then manufacturing precision is improved, but the stress concentration in the narrowed region increases
Solution Approach 1:
The patent applies beforehand cushioning by designing the narrowed region with specific geometric parameters that anticipate and prepare for the increased stress. The gradual transition zones and carefully calculated wall thickness reductions are designed in advance to distribute stresses favorably, preventing stress concentration from causing failure while maintaining the elastic deformation needed for compensation.
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 approach ensures better joint-forming results with reduced angular deviations and improved service life by making angular deviations and offsets independent of tool position, maintaining consistent quality across different load situations.
Implementation Method 1
designed elastic deformation of a tool holder at least partially compensates for load-dependent spreading of the arms of a supporting frame
Data Source
AI summary
Fastening apparatus comprises a frame having a pair of spaced arms supporting respective cooperable fastening members, loading of the frame during a fastening operation tends to spread the arms and cause variation of a desired predetermined relationship between the fastening members. One of the members is mounted on one arm of the frame by a holder constructed to deform elastically and thereby to provide at least partial compensation for the variation.