3D Laser Machine Approach Control for Nozzle Pose Changes
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Solution Overview
Problem
Three-dimensional laser machines face challenges in performing a prompt approach process due to the nozzle's non-linear orientation during the approach process, making traditional profile control methods inapplicable.
Innovation Solution
A three-dimensional laser machine equipped with a machine head, controller, and sensor that performs profile control by detecting the distance between the workpiece and nozzle, allowing for real-time orientation adjustments and precise positioning during the approach process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional profile control is applied to three-dimensional laser machines during approach process, then the control method is simple, but the approach process cannot be performed promptly due to nozzle orientation changes
Solution Approach 1:
The patent applies dynamics by making the profile control active only during specific phases of the approach process (when the machine head is below the midpoint and gap amount reaches given value) rather than continuously. This dynamic activation allows the system to adapt to the three-dimensional laser machine's unique characteristics where nozzle orientation changes during approach, enabling prompt approach process while maintaining control simplicity through conditional execution.
Solution Approach 2:
The patent changes the control parameters by introducing conditional thresholds (midpoint position, given gap amount) that trigger profile control activation. These parameter changes allow the system to switch between different control modes appropriately, resolving the contradiction by enabling enhanced control only when necessary during the approach process, thus improving productivity without permanently increasing device complexity.
2Speed
If the machine head moves quickly during approach process, then productivity is improved, but positioning precision deteriorates due to nozzle orientation changes
Solution Approach 1:
The patent implements periodic action by applying profile control intermittently during the approach process rather than continuously. The control is activated when specific conditions are met (machine head below midpoint, gap amount reaches given value) and deactivated when conditions are no longer met. This periodic application maintains high-speed movement capability while ensuring positioning precision is corrected at critical moments when nozzle orientation changes occur.
Solution Approach 2:
The patent uses feedback by continuously monitoring the machine head position and gap amount to determine when to activate or deactivate profile control. This feedback mechanism allows the system to automatically adjust the control strategy based on real-time conditions, maintaining both high speed and precision by applying corrections only when the monitored parameters indicate they are necessary.
3Manufacturing precision
If profile control is applied continuously during approach process, then positioning precision is improved, but the approach process time increases
Solution Approach 1:
The patent applies partial action by implementing profile control only for the necessary portion of the approach process rather than continuously. Specifically, profile control is activated when the machine head moves below the midpoint and the gap amount reaches a given value, and deactivated when conditions are no longer met. This partial application provides sufficient positioning precision correction while minimizing the time penalty, avoiding the excessive action of continuous 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
Enables a more efficient and prompt approach process by correcting the machine head's position and orientation, reducing the time required to move the nozzle to the machining start position.
Implementation Method 1
a sensor for detecting a distance between the workpiece and the nozzle
Data Source
AI summary
A three-dimensional laser machine includes a machine head, a controller for positioning the machine head and controlling an orientation of a nozzle, and a sensor for detecting a distance between a workpiece and the nozzle. The controller is capable of performing a profile control of correcting the position of the machine head based on the detected distance. When the machine head has reached a predetermined position part way through an approach process of moving the machine head from an approach start position to a machining start position while controlling the pose of the nozzle, the controller performs the profile control to move the machine head to the machining start position.