Arch-shaped cylinder growth model-based five-axis additional material simulation method
A technology of growing models and simulation methods, applied in the field of additive manufacturing, can solve the problems of conservation, not considering the quality of processing materials, and reducing the reference value of simulation effects, so as to reduce the accumulation of simulation errors and improve the reference value.
Inactive Publication Date: 2018-09-28
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
However, this method has the following three problems: (1) The single cladding track section of the actual additive processing is more similar to a part of a circle, and there are some differences from the rectangular section of the cuboid model; (2) During the material accumulation process, the simulation The errors between the model and the actual cladding road morphology are constantly accumulating, which reduces the reference value of the simulation effect for actual processing; (3) The mass conservation of the processed materials is not considered in the cumulative simulation process
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Embodiment 1
[0033] This embodiment provides a five-axis additive simulation method based on an arcuate cylinder growth model. The method comprises the steps of:
[0034] Step (1): Obtain the additive processing trajectory in the CAM software, analyze the additive trajectory file, and obtain the tool position information.
[0035] In this step, analyze the input five-axis additive processing trajectory file, obtain the spot diameter D of the laser processing tool, the layer thickness H of the single cladding path of the simulation trajectory, and extract the tool position sequence P of the processing trajectory 1 , P 2 ,...,P n , n is the number of tool positions, and the tool axis vector at the corresponding tool positions.
[0036] Step (2): According to the forming process of additive processing, the growth model of the bow-shaped cylinder is established.
[0037] In this step, the growth model of the arcuate cylinder is established. The laser spot diameter D obtained in step (1) i...
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The invention discloses an arch-shaped cylinder growth model-based five-axis additional material simulation method, which comprises the following steps: analyzing an input five-axis additional material processing track file to acquire cutter location point information; building an arch-shaped cylinder growth model according to the acquired cutter location point information, wherein the arch-shapedcylinder growth model consists of two parts: an arc-shaped cylinder and part of spheres at both ends of the arc-shaped cylinder; performing linear interpolation on adjacent cutter locations accordingto the acquired cutter location point information, and calculating an additional material sweep body between adjacent interpolation points; converting the additional material sweep bodies into Tri-dexel models; performing Boolean summation on the Tri-dexel model according to the law of conservation of mass of a material, thus obtaining an accumulated Tri-dexel simulation model; and displaying theTri-dexel simulation model through a triangular patch. According to the arch-shaped cylinder growth model-based five-axis additional material simulation method disclosed by the invention, under the condition of obeying the law of conservation of mass, geometrical simulation of additional material manufacturing is implemented, and the simulation model closer to actual processing is generated; andthe generated additional material forming model can be used as a blank for subtractive material processing.
Description
technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a five-axis additive simulation method based on an arcuate cylinder growth model. Background technique [0002] Additive manufacturing technology refers to the accumulation of special materials layer by layer through computer-aided manufacturing (CAM) software and numerical control system based on the principle of discrete accumulation, according to extrusion, sintering, melting, light curing, spraying, etc., to manufacture physical objects manufacturing technology. At present, the main additive technologies include fused deposition type (FDM), direct metal laser sintering (DMLS), laser engineered net shaping (LENS), selective laser sintering (SLS), and stereolithography (SLA). [0003] In terms of early-developed subtractive manufacturing, mature CAM software such as NX and CATIA provide complex five-axis trajectory simulation functions to simulate the mate...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 颜昌亚林涛何姗姗曾雄志李振瀚
Owner WUHAN INSTITUTE OF TECHNOLOGY