On-line monitoring method for use ratio of laser additive manufacturing powder

Abstract

The invention discloses an on-line monitoring method for the use ratio of laser additive manufacturing powder. An image online processing unit and a powder use ratio online processing unit are added to a laser additive monitoring system used by the method on the basis of an original laser additive and online monitoring system thereof; the original laser additive and the online monitoring system thereof include a laser device, a laser head, a displacement device, a material feeding device and an image paraxial collecting unit; the image online processing unit comprises a gray processing module,an image filtering noise-reducing module and a powder splashing feature extracting module; the powder use ratio online processing unit is capable of online acquiring a real-time monitoring value of the powder use ratio according to a height feature and a width feature in a splashing scope acquired by the image online processing unit. The on-line monitoring method for the use ratio of laser additive manufacturing powder utilizes the powder use ratio online processing unit to realize the quick and reliable online monitoring for the use ratio of laser additive manufacturing powder through imagecalibration, collection, pretreatment, correction, calculation, and the like.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of laser additive materials, in particular to an online monitoring method for the utilization rate of laser additive powder. Background technique [0002] Different from the traditional processing mode, additive manufacturing technology is a "bottom-up" process of accumulating materials layer by layer. Because of its rapidity, directness, high degree of intelligence and flexibility, the traditional manufacturing of complex structural parts has become a Reality. Laser additive manufacturing technology is widely used in additive manufacturing because of its high energy density, which can realize the manufacture of difficult-to-process materials. . However, the production characteristics of high energy consumption and low productivity in the laser additive process have many restrictions on its development. [0003] The powder utilization rate is an important indicator of the material co...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an online monitoring method for the utilization rate of laser additive powder, thereby solving the problem of online monitoring of powder utilization rate in the laser additive process, so that the laser additive manufacturing can be obtained in real time. The powder utilization rate value in the process, this method is simple and convenient, with a high degree of integration, can be directly embedded in the current monitoring system, and has strong adaptability, and is not limited by the size and properties of the matrix or feed materials. It provides a certain basis for engineering practitioners to achieve online correction and optimization of powder utilization by adjusting parameters such as defocus

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