Electroadhesive Gripper for Flexible Material Handling
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Solution Overview
Problem
Conventional robotic grippers face limitations in handling flexible, porous, and delicate materials due to the need for smooth surfaces, high power consumption, and potential damage during handling, and they often require precise orientation and are costly and bulky, limiting their application in industries like footwear and apparel manufacturing.
Innovation Solution
The use of electroadhesion technology combined with vacuum and mechanical release mechanisms to enable the precise handling and placement of a wide range of materials, including flexible and porous items, without distorting their shape, and the integration of an automated visualization system for accurate alignment and placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional robotic grippers use suction to grip objects, then gripping force is applied, but the method requires smooth, clean, dry, non-porous surfaces and consumes high power
Solution Approach 1:
The patent replaces conventional mechanical suction grippers with an electroadhesive system that uses electric fields to generate holding force. The electroadhesive array with conductive elements and dielectric layer creates electrostatic attraction forces that can grip diverse surfaces including porous and flexible materials without requiring smooth, non-porous surfaces as conventional suction grippers do.
Solution Approach 2:
The invention changes the physical parameter of force generation from pneumatic pressure (suction) to electrostatic field intensity. By controlling the voltage applied to the electroadhesive array, the system can adjust the holding force dynamically and adapt to different material types, thereby improving surface compatibility while maintaining gripping effectiveness.
2Force
If conventional robotic grippers use mechanical actuation with large normal forces, then gripping force is applied, but the method requires large crushing forces that increase actuation cost and can damage delicate objects
Solution Approach 1:
The patent substitutes mechanical crushing force with electroadhesive force generated by electric fields. The electroadhesive array creates distributed electrostatic attraction across the contact surface, eliminating the need for concentrated normal forces that cause damage to flexible, deformable, or delicate objects while maintaining sufficient gripping strength.
3Reliability
If conventional robotic grippers use suction, then gripping is achieved, but the method is prone to leaks at vacuum seals resulting in catastrophic loss of suction
Solution Approach 1:
The invention replaces the vacuum seal-based suction system with an electroadhesive system that does not rely on sealed enclosures. The electroadhesive array with conductive elements and dielectric layer creates direct electrostatic attraction between the gripper and object, eliminating vacuum seals and their associated leak vulnerabilities, thereby improving gripping reliability.
4Productivity
If conventional robotic systems are designed for high-speed operation, then productivity increases, but the system size and equipment requirements increase substantially
Solution Approach 1:
The patent employs dynamic control of the electroadhesive array, where individual conductive elements can be independently activated and deactivated. This dynamic capability allows the system to achieve high productivity through rapid, selective manipulation of multiple objects without requiring high-speed robotic mechanisms or large equipment, as the electroadhesive forces can be engaged and disengaged instantly through electrical control.
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
This approach allows for high-throughput material handling without the need for high-speed robots or large equipment, enabling the precise placement of flexible materials while minimizing damage and reducing operational costs, thus enhancing manufacturing efficiency in industries like footwear and apparel.
Implementation Method 1
The electroadhesive array can be used to pick up flexible materials such as fabric, leather, foam, and the like, without distorting the shape of the flexible materials
Implementation Method 2
In an automated embodiment, a visualization system can be used to determine the location and orientation of a material
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Systems, apparatus, and methods of manufacturing an article using electroadhesion technology for the pick-up and release of materials, respectively. Such a system, apparatus, and method may include article components placed on a platform, where an article component for example optionally comprises a textile piece, a shoe part, an automotive part, a machinery part, or a circuitry part, such that the article assembled on the second platform comprises, respectively, at least a portion of an article of clothing, at least a portion of a shoe, at least a portion of a machine, or at least a portion of a circuit.