Image processing gtaw additive manufacturing stacking height visual inspection method and system

Abstract

The invention provides a method and system for visual detection of stacking height in GTAW additive manufacturing with image processing. The axis of the CCD camera is perpendicular to the plane formed by the axis of the GTAW welding torch and the axis of the guide wire tube; continuous image acquisition is started to complete the calibration of the sensor system and determine The position of the tip of the tungsten electrode; measure the initial distance from the tip of the tungsten electrode to the surface of the substrate, start the GTAW arc and wire filling system; image processing algorithm extracts the surface features of the tail of the accumulated layer molten pool; calculate the surface of the accumulated layer molten pool corresponding to the column of adjacent continuous images Row coordinate mean square error, threshold method to determine the junction point of liquid and solid metal at the tail of the molten pool on the surface of the accumulation layer; when accumulating the nth layer, according to the initial distance from the tip of the tungsten electrode to the surface of the substrate, the position of the tip of the tungsten electrode, and the liquid-solid junction point of the accumulation layer The position calculates the total height of the accumulation layer at the current moment. The method of the invention effectively solves the problem that the accumulation height of GTAW additive manufacturing is difficult to detect in real time, and has the advantages of simple detection process and intuitive and rich information.

Description

technical field [0001] The invention belongs to the technical field of arc-filled wire additive manufacturing, and in particular relates to an image processing-based visual sensing detection method and detection system for stacking height of tungsten inert gas shielded welding (Gas tungsten arc welding, GTAW) additive manufacturing. Background technique [0002] GTAW additive manufacturing is an important branch of arc-filled wire additive manufacturing technology. GTAW is used as the heat source, and metal wire is used as the filling material to form metal components layer by layer according to the set path. This technology has the advantages of small heat input and high forming precision, and is suitable for forming medium and large-sized metal components. At present, it is widely used in direct manufacturing of titanium alloy, stainless steel, nickel-based alloy and aluminum alloy components. [0003] In GTAW additive manufacturing, every time a layer is stacked, the wor...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of stacking defects caused by the inconsistency between the stacking height and the expected height in the GTAW additive manufacturing process, and to provide an image-processing GTAW additive manufacturing stacking height visual sensing detection method and system

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