Laser Machining Teaching via Beam Size to Defocus Conversion
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Solution Overview
Problem
Current teaching devices for laser processing machines are complex and inefficient in adjusting heat input by shifting the focal point of the laser beam, making it difficult to intuitively teach the operation for adjusting heat input during laser processing.
Innovation Solution
A teaching device that includes a parameter input receiving unit, a relational data acquiring unit, a conversion unit, and a program generating unit, which allows operators to input beam size parameters, convert them into corresponding defocus amounts, and generate operation programs to adjust the focal point, simplifying the teaching process for adjusting heat input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the focal point of the laser beam is shifted from the surface to adjust heat input, then the heat input control is improved, but the teaching operation becomes more complex
Solution Approach 1:
The teaching device introduces an intermediary conversion unit that translates the operator's intuitive beam size specifications into the actual defocus amounts required by the laser processing machine. This intermediary layer shields the operator from the complexity of direct defocus amount adjustment while achieving precise heat input control through automated parameter conversion based on stored relational data.
2Temperature
If the defocus amount is directly specified for heat input adjustment, then the heat input control precision is improved, but the ease of operation deteriorates
Solution Approach 1:
The system pre-stores relational data that copies and represents the relationship between beam size and defocus amount. During teaching operations, the operator simply specifies beam size parameters, and the system automatically retrieves and applies the corresponding defocus amounts from this pre-established relational database, eliminating the need for operators to directly calculate or specify complex defocus values.
3Ease of operation
If the beam size is used as the input parameter for teaching, then the intuitiveness of teaching is improved, but the conversion to defocus amount requires additional processing
Solution Approach 1:
The system performs preliminary action by pre-calculating and storing the relational data between beam size and defocus amount before actual teaching operations. This advance preparation allows the conversion unit to quickly retrieve and apply corresponding defocus amounts during teaching without performing complex real-time calculations, thus maintaining intuitiveness while minimizing conversion time.
Data Source
AI summary
A teaching device is provided with: a parameter input reception unit that receives input of a beam size indicating the size of laser light spot on a surface; a relation data acquisition unit that acquires relation data indicating a relation between a defocusing amount for shifting the focal point of the laser light from the surface in the optical axis direction of the laser light and the beam size which varies depending on the defocusing amount; a conversion unit that on the basis of the relation data, converts the beam size received by the parameter input reception unit to a corresponding defocusing amount; and a program generation unit that generates an operation program for laser machining that stipulates the defocusing amount converted by the conversion unit as a command statement.