Adaptive Guide Bushing With Elastic Fit for Laser Tube Cutting
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Solution Overview
Problem
Laser cutting systems face challenges in achieving tight tolerances due to improper fitting of tubing within the guide bushing, leading to distortions or errors in cuts, especially at small radii, which is critical for medical device manufacturing.
Innovation Solution
An adaptive guide bushing system using an elastic material to adjust the fit of tubing, allowing for tighter tolerances by expanding and contracting to accommodate varying tube diameters, reducing friction-related errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the tubing fit within the guide bushing is made tight to reduce looseness errors, then cutting precision improves, but friction increases causing distortions especially at small radii
Solution Approach 1:
The guide bushing incorporates an elastic material that changes its dimensional parameters dynamically. The elastic material can compress and expand to adapt to different tubing diameters, maintaining optimal contact pressure that prevents looseness errors while avoiding excessive friction that causes distortions. This parameter adaptation resolves the contradiction between tight fit for precision and loose fit for reduced friction.
Solution Approach 2:
The guide bushing transitions from a static rigid structure to a dynamic adaptive structure using elastic material. The elastic material allows the bushing to dynamically adjust its internal diameter and contact characteristics based on the tubing being guided, enabling it to optimize the fit for each specific tubing dimension and prevent both looseness and excessive friction simultaneously.
2Object-generated harmful factors
If the tubing fit within the guide bushing is made loose to reduce friction, then distortion errors decrease, but looseness errors such as thin and thick struts increase
Solution Approach 1:
The elastic material in the guide bushing dynamically adjusts its compression level to maintain optimal tubing fit. By changing its dimensional parameters in response to tubing diameter variations, the elastic material ensures consistent contact pressure that prevents both excessive friction (reducing distortion errors) and insufficient contact (preventing looseness errors like thin and thick struts).
Solution Approach 2:
The elastic material automatically adjusts the fit between the guide bushing and tubing without external intervention. The material's inherent elasticity allows it to self-regulate the contact pressure based on the tubing dimensions, ensuring consistent guidance that prevents both distortion errors and looseness errors across varying tubing sizes.
3Device complexity
If a fixed guide bushing is used to simplify the system, then device complexity decreases, but adaptability to varying tube diameters is lost
Solution Approach 1:
The guide bushing uses elastic material that inherently changes its dimensional parameters to adapt to different tubing diameters. This elastic adaptation provides versatility across varying tube sizes without requiring multiple fixed bushings or complex adjustment mechanisms, thus maintaining system simplicity while achieving adaptability.
Solution Approach 2:
The guide bushing incorporates an elastic material shell that flexes and deforms to accommodate varying tubing diameters. This flexible shell approach provides adaptability to different tube sizes while maintaining a simple single-component structure, avoiding the need for complex adjustable or interchangeable bushing systems.
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 achieves improved cutting accuracy with tolerances of +/−0.00005″, significantly enhancing the precision of laser cuts in medical devices.
Implementation Method 1
An adaptive guide bushing (150) includes an elastic material (180) to hold the tubing (200) being laser cut
Data Source
AI summary
An adaptive guide bushing for laser workpiece cutting systems, the adaptive guide bushing including an clastic member that expands and contracts to hold a workpiece within a central opening for laser cutting.