Robot Hand Vibration Damping with CFRP and Viscoelastic Resin
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Solution Overview
Problem
Robot hands made from carbon-fiber-reinforced plastics lack vibration-damping properties while maintaining flexural rigidity, which is essential for handling sensitive substrates in industrial robots.
Innovation Solution
Incorporating a vibration-damping elastic layer with viscoelastic resin and high-rigidity resin regions alternately arranged between carbon-fiber-reinforced plastic layers, and optionally including a fibrous substance in the viscoelastic resin, to enhance vibration damping while maintaining flexural rigidity, with a heat-transfer medium flow path for temperature adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a robot hand is manufactured from carbon-fiber-reinforced plastic, then weight is reduced and flexural rigidity is improved, but vibration-damping properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining carbon-fiber-reinforced plastic layers with a vibration-damping elastic layer containing viscoelastic resin and high-rigidity resin. This composite structure integrates the lightweight and rigid properties of carbon-fiber-reinforced plastic with the vibration-damping properties of the elastic layer, resolving the contradiction between weight reduction and vibration damping.
Solution Approach 2:
The patent applies local quality by creating regions with different material properties within the robot hand structure. The vibration-damping elastic layer is strategically positioned between carbon-fiber-reinforced plastic layers, with viscoelastic resin regions for damping and high-rigidity resin regions for structural support, allowing different parts of the robot hand to have optimized local properties for their specific functions.
2Object-affected harmful factors
If a vibration-damping elastic layer is added to improve vibration-damping properties, then vibration damping is improved, but device complexity increases
Solution Approach 1:
The patent integrates the vibration-damping elastic layer as part of a composite structure with carbon-fiber-reinforced plastic layers, where the layers are laminated together to form a unified component. This approach adds vibration-damping functionality without requiring separate, complex vibration-damping systems, thereby limiting the increase in device complexity.
3Strength
If high-rigidity resin regions are added to maintain flexural rigidity, then flexural rigidity is maintained, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating high-rigidity resin regions within the vibration-damping elastic layer at specific locations where structural support is needed. These high-rigidity regions are strategically positioned to maintain flexural rigidity of the robot hand while allowing other regions to provide vibration damping, optimizing the structure without adding unnecessary complexity throughout the entire component.
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 effectively improves vibration-damping properties while maintaining sufficient flexural rigidity, enabling efficient handling of substrates by dampening vibrations and allowing temperature control, thus enhancing the performance of robot hands in industrial applications.
Implementation Method 1
the vibration-damping elastic layer includes a viscoelastic resin region including a viscoelastic resin
Implementation Method 2
a heat-transfer medium flow path for circulating heat-transfer medium therethrough is provided along an outer border of the viscoelastic resin region
Data Source
AI summary
A robot hand having an attachment portion that is held when incorporated into a robot includes CFRP laminated to each other and a vibration-damping elastic layer that is disposed between the CFRP layer and the CFRP layer. The vibration-damping elastic layer includes viscoelastic resin regions including a viscoelastic resin and a high-rigidity resin region including high-rigidity resin. The viscoelastic resin regions and the high-rigidity resin region are alternately arranged along the direction intersecting the longitudinal direction of the CFRP layer in the attachment portion. The viscoelastic resin regions improve vibration-damping properties on the robot hand. As the viscoelastic resin regions and the high-rigidity resin region having relatively higher rigidity are alternately arranged along the direction intersecting the longitudinal direction of the CFRP layers, flexural rigidity along the longitudinal direction of the CFRP layer is improved.