Holding Simulation for Suction Pad Selection in Pick-and-Place
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Solution Overview
Problem
Conventional simulation methods for pick-and-place devices cannot accurately determine if a workpiece can be held by a robot, as they do not consider parameters related to the holding member, such as shape, material, and position, leading to inefficiencies in production line operations.
Innovation Solution
A device that simulates holding detection results by accepting workpiece information and holding member parameters, selecting suitable holding members based on these parameters, and outputting the information for accurate simulation, including suction pad candidates with specific details like shape, material, and placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional simulation methods are used that only estimate vibration acceleration based on robot operating speed, then the simulation can be performed quickly, but the simulation accuracy is insufficient because parameters related to holding members are not considered
Solution Approach 1:
The patent applies parameter changes by incorporating multiple holding member parameters (shape, material, diameter, number, suction position) into the simulation model. This allows the simulation to accurately reflect real-world conditions by varying these parameters based on different workpiece characteristics, thereby improving simulation accuracy without requiring complex physical prototypes
Solution Approach 2:
The patent implements preliminary action by performing holding simulations before actual production operations. The system pre-determines suitable holding members and their parameters based on workpiece information, allowing operators to plan and optimize holding configurations in advance without interrupting production lines or requiring trial-and-error adjustments on real devices
2Measurement precision
If real devices are deployed and adjusted by trial and error, then accurate holding parameters can be determined, but production efficiency is degraded due to line suspension or stops
Solution Approach 1:
The system performs holding simulations and determines optimal holding member parameters before actual production begins. By pre-calculating the appropriate holding members based on workpiece information (mass, outline, vibration tolerance), the system eliminates the need for trial-and-error adjustments on the production line, thereby maintaining continuous operation and high productivity while achieving accurate holding configurations
3Measurement precision
If holding member parameters such as shape, material, and diameter are considered in simulation, then the simulation results become more accurate, but the computational complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the holding member configuration into discrete, selectable parameters (different shapes, materials, diameters, numbers, and positions). This modular approach allows the system to evaluate multiple predefined configurations efficiently rather than performing continuous optimization calculations, thereby maintaining simulation accuracy while reducing processing time
Solution Approach 2:
The system efficiently handles multiple parameters by using predefined parameter sets for holding members. Instead of continuously varying parameters, the system selects from discrete parameter combinations based on workpiece characteristics, which simplifies computational requirements while still achieving accurate simulation results that account for shape, material, diameter, number, and position variations
Data Source
AI summary
The purpose of the present invention is to provide a device for outputting holding detection results by a highly accurate simulation in consideration of parameters related to a holding member. A user enters workpiece information through an input UI unit. A selection control unit executes an automatic selection process of a suction pad based on the workpiece information input through the input UI unit, an automatic selection process of a workpiece physical model, an automatic selection process of a robot, and a confirmation process of a vibration tolerance, and then displays the selection results. The selection control unit determines whether there is a problem with the selection results based on an input instruction from the user.