Fastener with Damper Assembly for Drill Jig Clamping
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Solution Overview
Problem
The existing fastening systems for drill jigs to overlapping work pieces face challenges in applying sufficient clamping force to reduce burr formation without deforming the drill jig, which can lead to misalignment and compromised fastening capabilities, resulting in time-consuming assembly and disassembly processes.
Innovation Solution
A fastener system comprising a fastener body and a damper assembly that applies a first load to the drill jig and a second load to the work pieces, with the first load being less than the second load, allowing securement of the drill jig without deformation and sufficient clamping force to reduce burr formation during drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If sufficient clamping force is applied to reduce burr formation during drilling, then burr formation is reduced, but the drill jig may significantly deform or be damaged
Solution Approach 1:
The fastening system is segmented into two distinct load application mechanisms: a first load application mechanism that applies sufficient clamping force to reduce burr formation, and a second load application mechanism that applies a controlled, reduced load to prevent drill jig deformation. This segmentation allows each mechanism to be optimized for its specific function without compromising the other.
Solution Approach 2:
Different load levels are applied to different components: a higher first load is applied locally to the work pieces to reduce burr formation, while a lower second load is applied to the drill jig to prevent deformation. This local differentiation of load quality resolves the contradiction between needing high clamping force and protecting the drill jig.
2Object-generated harmful factors
If high clamping force is applied to eliminate burrs, then burr formation is reduced, but the fastening capability of the drill jig is compromised
Solution Approach 1:
The fastening system separates the burr reduction function from the fastening function by applying two different loads through different mechanisms. The first load mechanism handles burr reduction while the second load mechanism maintains fastening capability, allowing both functions to be optimized independently.
Solution Approach 2:
The system changes the load parameter applied to different components: a higher first load parameter is used for burr reduction on work pieces, while a lower second load parameter is used for maintaining fastening capability on the drill jig. This parameter differentiation resolves the contradiction between burr reduction and fastening reliability.
3Object-generated harmful factors
If the drill jig is deformed during fastening, then burr formation is reduced, but misalignment of the drill jig bushing and pilot hole axis occurs
Solution Approach 1:
The system applies different load qualities to different components: high local clamping force on the work pieces to reduce burrs, while maintaining low overall load on the drill jig to preserve alignment precision. This local quality differentiation prevents the contradiction between burr reduction and alignment accuracy.
Solution Approach 2:
The fastening system segments the load application into two independent mechanisms with different load magnitudes, allowing burr reduction to be achieved without compromising the drill jig's alignment precision. The first load mechanism targets burr formation while the second maintains manufacturing precision.
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 system enables accurate drilling by minimizing burr formation and preventing drill jig deformation, thereby streamlining the assembly process and maintaining the integrity of the fastening system.
Implementation Method 1
The damper assembly is configured to enable application of a first load to the drill jig... The first load is sufficient to hold the drill jig to the overlapping work pieces during drilling but without causing significant deformation of the drill jig
Data Source
AI summary
A fastener for fastening a drill jig to overlapping work pieces and clamping the overlapping work pieces for facilitating accurate drilling of the overlapping work pieces including a fastener body and a damper assembly operatively connected to the fastener body. The damper assembly is configured to enable application of a first load to the drill jig, and the fastener body is configured to enable application of a second load to the overlapping work pieces when the fastener fastens the drill jig to the overlapping work pieces. The first load is less than the second load. The first load is sufficient to hold the drill jig to the overlapping work pieces during drilling but without causing significant deformation of the drill jig. The second load is sufficient to reduce the formation of burrs during drilling of a hole through the overlapping working pieces.