Pick-up Nozzle Ventilation Groove Coanda Effect
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Solution Overview
Problem
Existing pick-up devices for sheet-shaped workpieces struggle to stably pick up individual workpieces, especially when they are made of materials that cause sticking or require precise separation, leading to inefficiencies in sewing operations.
Innovation Solution
A pick-up device equipped with a nozzle mechanism that uses air blowing to pull up workpieces through a ventilation groove with a shaped inner bottom surface that utilizes the Coanda effect, combined with a separation mechanism and suction mechanism, to effectively separate and hold individual workpieces, and a control system that detects workpiece thickness and surface state for precise handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a suction nozzle is used to pick up workpieces by allowing the tip part to abut against the first workpiece from the top, then the workpieces can be picked up, but two or more workpieces are picked up at a time making it difficult to stably perform a desirable pick-up operation
Solution Approach 1:
The bottom surface of the suction nozzle is divided into multiple independent suction ports arranged in an array. Each suction port independently interacts with the workpieces, allowing precise control over which workpieces are picked up. This segmentation prevents multiple workpieces from being picked up simultaneously while maintaining efficient pick-up operation.
Solution Approach 2:
The suction ports are non-uniformly distributed on the bottom surface of the nozzle, with specific regions having different densities or configurations of suction ports. This local variation in quality allows different areas of the nozzle to handle different aspects of workpiece pickup, improving both stability and efficiency.
2Ease of operation
If the tip part of the suction nozzle abuts against the first workpiece from the top, then the workpiece can be picked up, but workpieces made of materials that cause sticking or require precise separation are difficult to handle
Solution Approach 1:
Multiple independently controllable suction ports allow the system to selectively activate only the ports needed for picking up specific workpieces. This enables precise control over the pickup process, allowing the system to handle difficult materials by adjusting which ports are active and how much suction is applied to each.
Solution Approach 2:
The suction force at each port can be dynamically adjusted independently, allowing the system to adapt to different material properties in real-time. This dynamic control enables the system to handle sticking materials by modulating suction forces to prevent binding while maintaining separation precision.
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 device enables stable and efficient picking up of individual workpieces, even those made of materials that tend to stick together, by accelerating separation and ensuring accurate gripping and supply to sewing machines, enhancing operational reliability.
Implementation Method 1
the air blowing side end part of the groove inner bottom surface of the ventilation groove is formed in a shape directed in a direction of being separated from the workpiece... Coanda effect allows air to flow along an inner bottom surface, formed in a shape of being separated from the workpiece, of the ventilation groove
Implementation Method 2
a pick-up nozzle that pulls up a first workpiece from the top of the stacked workpieces by air blowing... a nozzle port that blows air toward the air blowing side end part of the bottom surface along the inside of the ventilation groove
Data Source
AI summary
A pick-up device picking up stacked sheet-shaped workpieces from the top, the device includes a nozzle mechanism that includes a pick-up nozzle pulling up a first workpiece from the top of the stacked workpieces by air blowing, and a holding mechanism that holds the first workpiece from the top. The pick-up nozzle includes a ventilation groove provided on a bottom surface opposite to an upper surface of the first workpiece from the top and passing through to an air blowing side end part of the bottom surface, and a nozzle port blowing air toward the air blowing side end part of the bottom surface along the inside of the ventilation groove, and the air blowing side end part of a groove inner bottom surface of the ventilation groove is formed in a shape directed in a direction of being separated from the workpiece.