A method of controlling the state of molten pool of fused filament deposition
A fusion filament deposition and molten pool technology, applied in manufacturing tools, plasma welding equipment, metal processing equipment, etc., can solve problems such as cladding layer collapse, poor molding quality, and uneven heat distribution
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Embodiment 1
[0020] Embodiment 1: refer to figure 1 , image 3 , the technical solution adopted by the present invention for the above-mentioned problems is as follows: first, a high temperature threshold T is set according to the welding process 1 and a minimum radius R of the high temperature region 0 and the minimum area S of the high temperature region MIN , according to the temperature measurement results of real-time scanning of the molten pool by the infrared scanning thermometer, for temperatures higher than T 1 The position of punctuation is analyzed and recorded as {A 1 ,A 2 ,...,A X}, the central processing unit automatically establishes a planar Cartesian coordinate system, and projects the scanned boundary line of the high-temperature area into the coordinate system.
[0021] Perform data preprocessing on the boundaries of high-temperature areas, first perform smooth processing, identify sharp inflection points in the image and eliminate them, and separate them at a dist...
Embodiment 2
[0064] Embodiment 2: refer to figure 1 , Figure 4 , for the high-temperature area with irregular shape, fuzzy partition processing is performed, and one or more simple regular figures with similar shapes are selected to replace according to the fitting result of the Nth time, and some dead corners or the remaining area after division are smaller than Default value S MIN The small area of the area is discarded, so that multiple high-temperature areas with regular shapes that are tangent or intersecting will be obtained, then the magnetic field is controlled to make the arc avoid the trajectory of the non-intersecting part, and a circular arc transition is used at the tangent and intersection ( Presetting the minimum transition radius) in advance can prevent the arc from hovering in densely contoured places for too long and cause excessive heat input, and also reduce the accuracy requirements for arc control.
Embodiment 3
[0065] Embodiment 3: refer to figure 2 , Figure 5 When the distribution of multiple high-temperature areas is similar, the minimum distance is judged along the arc swing trajectory, if it is less than the preset value L 0 , according to the intersecting process, the transition radius of curvature of the transition arc is determined according to the radius of curvature of the intersection point of the contour and the swing track, and the transition is made in the way of arc transition, which can not only reduce heat input, but also reduce the arc swing stroke and improve Efficiency, and can also reduce the requirements for arc swing accuracy. If the distance is greater than the preset value L 0 , the avoidance is performed according to the original contour trajectory, and smoothing is performed at the intersection of the contour and the swing trajectory.
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