3D Nozzle Path Correction for Precise Shot Treatment
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Solution Overview
Problem
Existing shot blasting technologies face challenges in precisely positioning a nozzle to treat specific areas of a workpiece without colliding, especially when the workpiece is tilted or offset, due to the radial ejection of shot material and reliance on two-dimensional imaging.
Innovation Solution
A shot treatment apparatus equipped with a three-dimensional information obtaining sensor, a nozzle moving mechanism, and a control system that adjusts the nozzle's position and pose based on three-dimensional data to prevent collisions, allowing for precise targeting of specific workpiece areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the distal end of the nozzle is positioned closer to the workpiece to treat specific areas, then the shot treatment precision is improved, but the risk of nozzle collision with the workpiece increases
Solution Approach 1:
The patent transitions from two-dimensional imaging (single direction) to three-dimensional imaging (multiple directions) to obtain comprehensive spatial information about the workpiece. This dimensional upgrade enables precise positioning of the nozzle in 3D space while maintaining safe distances, resolving the contradiction between treatment precision and collision risk.
Solution Approach 2:
The system uses a 3D imaging device to continuously capture workpiece position and attitude, feeds this information to the control unit, which then adjusts the nozzle's position and movement path in real-time. This closed-loop feedback mechanism enables precise targeting while dynamically avoiding collisions.
2Device complexity
If two-dimensional imaging is used to determine nozzle movement path, then the system complexity is reduced, but the ability to handle tilted or offset workpieces is insufficient
Solution Approach 1:
The patent upgrades from 2D to 3D imaging to capture comprehensive spatial information including workpiece tilt and offset. This additional dimensional data enables the system to adapt to various workpiece positions and orientations while maintaining manageable system complexity through integrated control algorithms.
3Productivity
If the nozzle is moved into the vicinity of the workpiece for targeted treatment, then the shot treatment effectiveness is improved, but the area affected by radial shot ejection increases causing unwanted treatment
Solution Approach 1:
The patent uses 3D imaging to identify specific local areas requiring treatment and directs the nozzle precisely to those locations. By understanding the workpiece's 3D geometry, the system can confine shot treatment to only the necessary areas even when the nozzle is positioned close, preventing unwanted treatment of surrounding regions.
Data Source
AI summary
A shot treatment apparatus ejects shot material from a nozzle towards a workpiece, and has the nozzle; a nozzle moving mechanism; and a three-dimensional information obtaining sensor; a pattern storage portion storing a nozzle reference operation pattern when the workpiece is installed at a reference position and a reference pose within the treatment compartment; a model data storage portion storing workpiece three-dimensional model data; a position/pose displacement calculating portion comparing the position and pose information and reference position and pose data when the three-dimensional model data is at the reference position in the reference pose to calculate a displacement in a position and pose of the workpiece from the reference position and pose data; and a nozzle movement control portion correcting the pattern based on the displacement in the position and pose, and controlling the nozzle moving mechanism to move the nozzle based on the corrected pattern.