Additive Manufacturing Bead Control for Stable Shape Error Correction
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Solution Overview
Problem
In additive manufacturing machining, correcting the material supply to the machining point based on shape errors is challenging, leading to difficulties in maintaining continuous machining and achieving reduced errors in the formed object.
Innovation Solution
An additive manufacturing apparatus with a shaping unit that adjusts material supply and heat source output, and an operation amount readjustment unit that preferentially adjusts either material supply or heat source output to maintain an appropriate range for bead formation, even after initial corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the material supply amount is corrected based on shape error, then the manufacturing precision is improved, but the continuous machining capability deteriorates because an appropriate amount of material cannot be melted
Solution Approach 1:
The system dynamically adjusts both material supply amount and heat source output based on the measured shape error, rather than fixing one parameter. This dynamic coordination ensures that when material supply is increased to correct shape errors, the heat source output is simultaneously increased to ensure complete melting, thereby maintaining continuous machining capability while improving manufacturing precision.
Solution Approach 2:
The invention changes multiple parameters (material supply amount and heat source output) in response to shape errors, rather than changing only one parameter. This multi-parameter adjustment approach resolves the contradiction by ensuring that material supply corrections are accompanied by appropriate heat source adjustments, preventing machining discontinuity while achieving shape accuracy.
2Productivity
If the heat source output is increased to melt more material, then the productivity is improved, but the manufacturing precision deteriorates due to excessive melting and shape errors
Solution Approach 1:
The system uses feedback from shape error measurements to coordinate adjustments of both material supply and heat source output. This feedback mechanism ensures that heat source output is increased only to the extent necessary to melt the corrected material supply amount, preventing excessive melting and shape errors while maintaining improved productivity.
Solution Approach 2:
The invention coordinates changes in heat source output with changes in material supply amount based on shape errors. This coordinated parameter change ensures that productivity improvements through increased melting are achieved without compromising manufacturing precision, as the heat source output is adjusted in proportion to the material supply correction rather than being independently increased.
3Manufacturing precision
If the material supply amount is increased to correct shape errors, then the manufacturing precision is improved, but the operation stability deteriorates when the material cannot be fully melted
Solution Approach 1:
The system dynamically coordinates adjustments of material supply amount and heat source output based on real-time shape error measurements. This dynamic coordination ensures that when material supply is increased to correct shape errors, the heat source output is simultaneously increased to ensure complete melting, thereby maintaining process stability while improving manufacturing precision.
Solution Approach 2:
The invention implements coordinated parameter changes in both material supply amount and heat source output in response to shape errors. This coordinated approach prevents machining process instability by ensuring that material supply corrections are always matched with sufficient heat source output to complete melting, while still achieving improved manufacturing precision through shape error correction.
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 apparatus effectively reduces shape errors in the manufactured object by ensuring continuous and stable machining, allowing for the production of objects with improved accuracy.
Implementation Method 1
a heat source output unit to output a heat source for melting the material, and a drive unit to move the heat source and the material supply unit, the shaping unit being configured to form a bead with the material melted using the heat source
Data Source
AI summary
An additive manufacturing apparatus includes: a shaping unit including a material supply unit, a heat source output unit for melting the material, and a drive unit that moves the heat source and the material supply unit, the shaping unit being configured to form a bead with the material melted; an operation amount adjustment unit that adjusts a material supply amount or a heat source output based on a shape error of the bead; and an operation amount readjustment unit that, in a case where an appropriate range of the material supply amount with respect to a value of the heat source output is set and the value of the material supply amount is out of the appropriate range after adjustment, selects the material supply amount or the heat source output as an operation amount, and preferentially readjusts the operation amount selected.