Drilling Nose Clamp With Bead Stop for Thrust and Precision
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Solution Overview
Problem
Existing drilling tools in the aeronautical field face challenges in applying significant thrust to parts due to friction-based stopping mechanisms, which lead to precision issues and inability to compensate for part deformation during drilling, resulting in suboptimal drilling precision and control.
Innovation Solution
A drilling tool with a hollow nose part and a gripping clamp featuring an elastic front blocking part with a radial bead, allowing for controlled stress application and movement compensation by transitioning from a retracted to a deployed position without radial expansion, ensuring precise positioning and stress control during drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If friction-based stopping mechanism is used, then the drilling tool can be positioned with respect to the tooling, but significant thrust cannot be applied to the part to be drilled
Solution Approach 1:
The stopping function is segmented from the positioning function. The bead provides a mechanical stop that can withstand significant thrust forces, while the gripping clamp with elastic blocking part provides precise positioning. This separation allows both high thrust application and precise positioning to coexist without compromising either function.
Solution Approach 2:
The bead acts as an intermediary element between the drilling tool and the tooling. It provides a reliable mechanical stop that transfers thrust forces without relying on friction, thereby enabling significant thrust application while maintaining positioning stability through the combined action of the bead stop and gripping clamp.
2Adaptability or versatility
If the gripping clamp is fixed in position, then the elastic blocking part can expand radially to ensure stopping, but the longitudinal position cannot be varied to compensate for deformation
Solution Approach 1:
The gripping clamp is designed with dynamic positioning capability, allowing it to move longitudinally along the hollow nose part. This dynamic adjustment enables the system to compensate for part deformation and maintain optimal positioning throughout the drilling process, while the elastic blocking part maintains radial expansion for reliable stopping.
Solution Approach 2:
The longitudinal position of the gripping clamp can be varied as a adjustable parameter. This parameter change capability allows the system to adapt to different drilling conditions, including compensation for part deformation, while maintaining the radial expansion characteristic of the elastic blocking part for consistent stopping performance.
3Ease of operation
If the elastic blocking part is expanded radially to ensure stopping, then positioning is achieved, but the gripping clamp cannot move rearward to compensate for relative movement
Solution Approach 1:
The stopping function and positioning function are segmented into different components. The bead provides reliable stopping through mechanical contact with the distal wall, independent of the gripping clamp's longitudinal position. This segmentation allows the gripping clamp to move freely for compensation while the bead maintains reliable stopping.
Solution Approach 2:
The bead serves as an intermediary stopping mechanism that decouples the stopping function from the gripping clamp's radial expansion. This allows the gripping clamp to adjust longitudinally for compensation while the bead maintains reliable stopping through its own mechanical engagement with the distal wall.
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 solution enables improved precision and controlled stress application during drilling, allowing for accurate alignment and deformation compensation, addressing the limitations of prior tools by maintaining reliable stopping and allowing forward movement to adjust for relative movements and deformations.
Implementation Method 1
the elastic front blocking part is expanded in an elastic manner radially towards the outside, while coming in contact with the inner wall of a guide orifice
Data Source
AI summary
Disclosed is a drilling tool intended to cooperate with a tooling including at least one guide orifice, including: a hollow nose part, through which a drilling member is intended to pass; and a gripping clamp, slidingly mounted on the hollow nose part, the sliding of the gripping clamp rearward along the hollow nose part leading to its radial expansion towards the outside. The distal end of the gripping clamp includes a bead protruding radially towards the outside, configured to ensure the stopping in translation of the drilling tool with respect to the tooling, by bearing against a wall of the tooling surrounding the guide orifice, when the gripping clamp is expanded radially towards the outside.