A composite manufacturing method of adding and subtracting materials for online layer-by-layer detection

Abstract

The invention belongs to the field of intelligent composite additive and subtractive material manufacturing, and discloses an online layer-by-layer detection additive and subtractive material composite manufacturing method, which includes: 1) establishing a three-dimensional model of the part to be formed and converting it into an STL model, and performing the STL model Carry out slicing, and obtain the theoretical morphology data of each layer, preset the additive processing path and subtractive processing path of each layer; 2) form multiple cladding paths according to the additive processing path of the current layer, and multiple The cladding road constitutes the current cladding layer, and the cladding road section morphology information is collected in real time while the cladding is forming, and the data is processed to obtain the current cladding layer morphology to assist in planning the path of adding and subtracting materials; 3) Repeat step 2) The cladding forming of each layer is completed to complete the manufacture of the entire part. The invention solves the problems of separation of manufacturing and measurement, lack of real-time feedback, and deviation in the manufacturing process in the past, improves manufacturing efficiency and manufacturing accuracy, and is suitable for layer-by-layer forming additive manufacturing.

Description

technical field [0001] The invention belongs to the field of intelligent composite additive and subtractive material manufacturing, and more specifically relates to an online layer-by-layer detection composite additive and subtractive material manufacturing method. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing) is a bottom-up direct rapid accumulation forming technology based on a 3D model. Aerospace, naval vehicles, weapons and equipment, and biomedical fields all have great application prospects. [0003] Wire additive manufacturing technology refers to the use of high-energy beam heat sources, such as arcs, lasers, electron beams, etc., to melt filamentous raw materials, and then pile them up layer by layer according to the set forming path until the forming is completed. Since the diameter of the wire is much larger than the size of the powder, the dimensional error of the wire additive manufacturing will be much larger than tha...

AI Technical Summary

Problems solved by technology

The above two shape measurement schemes are all three-dimensional shape measurement after the completion of additive manufacturing, which increases the process and affects the manufacturing efficiency of composite addition and subtraction materials.

In addition, there are some other detection methods, which usually obtain the overall size data of the part through three-coordinate machine, contour scanner and other equipment after the part is completed, and compare the obtained data with the theoretical CAD model data to obtain error analysis , and then carry out milling and trimming. If the dimensional error is large or there is a problem in a certain link that causes internal defects, it is necessary to partially remove and remanufacture the part, which may even cause the part to be unusable or scrapped.

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