Hinged-Jaw Clamp for Perpendicular Drilling in Thin Composites
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Solution Overview
Problem
Hand drilling of thin composite parts in the aerospace industry is challenging due to difficulty in maintaining precision, leading to issues like chipping, splintering, and delamination, which results in scrapped parts.
Innovation Solution
A drill guide system featuring pivotable clamp jaws with a longitudinal bore that ensures perpendicularity, combined with a vice grip mechanism and optical sighting device for accurate hole creation, allowing for precise and controlled drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand drilling is performed on thin composite parts, then the parts can be drilled without specialized equipment, but drilling precision deteriorates leading to chipping, splintering, and delamination
Solution Approach 1:
A clamp with hinged jaws acts as an intermediary device between the operator and the thin composite part. The clamp provides a stable reference frame with a longitudinal bore that guides the drill bit, ensuring perpendicular drilling without requiring specialized drilling equipment. This mediator device enables simple hand drilling operations while maintaining manufacturing precision.
2Measurement precision
If drill markings are accurately indicated on parts, then drilling location can be identified, but drilling accuracy still deteriorates due to difficulty in maintaining perpendicularity
Solution Approach 1:
The clamp's hinged jaw structure serves as a mechanical intermediary that enforces perpendicularity. The longitudinal bore in the jaw provides a physical guide for the drill bit, ensuring that drilling occurs at the correct angle regardless of marking accuracy. This mediator device translates the location information from markings into precise perpendicular drilling execution.
Solution Approach 2:
The invention replaces the reliance on operator skill and manual alignment (mechanical system) with a fixed geometric reference provided by the clamp's hinged jaw structure. The longitudinal bore in the jaw creates a mechanical constraint that automatically ensures perpendicular drilling, substituting complex manual alignment procedures with a simple geometric guide.
3Strength
If conventional clamps are used, then parts can be held securely, but drilling precision deteriorates due to lack of bore perpendicularity maintenance
Solution Approach 1:
The clamp employs hinged jaws that can dynamically adjust their orientation while maintaining clamping force. The hinges allow the jaws to pivot and conform to the part surface, ensuring both secure holding and perpendicular bore alignment. This dynamic adjustment capability enables the clamp to maintain both strength and manufacturing precision simultaneously.
Data Source
AI summary
A clamp comprises first and second jaws that provide contact surfaces. The first jaw is elongated and has a longitudinal bore. The jaws are transversely hinged to maintain bore perpendicularity.