Right-angle cutting simulation method based on mesoscopic metallographic structure

Abstract

The invention discloses a right-angle cutting simulation method based on a mesoscopic metallographic structure. In traditional simulation, different material properties of different metallographic structures are not considered, and the accuracy of the thermal diffusion process needs to be improved. The method comprises the following steps that a workpiece material needing to be predicted is placed under a metallographic microscope to analyze mesoscopic crystal structures, the size of each crystal structure is measured, and a mesoscopic real metallographic structure picture is obtained; carrying out binarization processing on the metallographic structure picture; the binarized picture is imported into a Solidworks software sketch editing module to be processed; carrying out regional division on a workpiece base body, and carrying out proper simplification processing on a real model; different material attributes are given according to a metallographic result obtained after binarization; performing grid division on the geometric model; a distorted grid on the cutting path is checked; and establishing a right-angle cutting simulation model assembly drawing, and carrying out a cutting experiment to obtain data. The method is used for right-angle cutting simulation.

Description

Technical Field

[0001] The invention relates to a right-angle cutting simulation method based on mesoscopic metallographic structure. Background Art

[0002] In the field of cutting processing, cutting force, as an important cutting parameter, has an important influence on tool breakage, wear, life, etc. Cutting force is affected by factors such as workpiece material, tool material, tool parameters, cutting speed, feed rate, back cutting amount, etc. In actual processing tests, conventional measuring instruments are complex to assemble and have high measurement costs. Traditional cutting simulation is based on the estimation method of macro cutting, and the prediction error of cutting force is large. Cutting temperature is also an important influencing factor in the cutting process, which has a huge impact on tool wear, tool material properties, and the quality of the machined surface. It is affected by many factors such as surface roughness, tool material, workpiece material, etc., and has time-varying characteristics. In actual processing monitoring, instrument monitoring is relatively complex, and it is difficult to observe heat diffusion during cutting. In traditional simulation, it does not take into account the different material properties of different metallographic structures, and the accuracy of the heat diffusion process needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems and propose a right-angle cutting simulation method based on the actual metallographic crystal structure at a mesoscopic scale, thereby obtaining a right-angle cutting simulation method with more accurate cutting force simulation and temperature diffusion closer to the actual situation.

[0004] The above purpose is achieved through the following technical solutions: A right-angle cutting simulation method based on mesoscopic metallographic structure, the method comprising the following steps: Step S1: placing the workpiece material to be predicted under a metallographic microscope to analyze the mesoscopic crystal structure, measuring the size of each crystal structure, and obtaining a mesoscopic real metallographic structure image; Step S2: importing the real metallographic structure picture into Auto CAD software, adjusting the contrast, and performing binarization processing on the metallographic structure picture; Step S3: Import the binarized image into the sketch editing module of Solidworks software, and obtain a sketch framework for boundary extraction after processing; Step S4: Import the sketch model through ABAQUS, perform regional segmentation on the workpiece matrix, and perform appropriate simplification on the real model; Step S5: using a constitutive relationship model and failure criteria of a suitable simulation material, and assigning different material properties in comparison with the binarized metallographic results; Step S6: Mesh the geometric model in the Mesh module of the ABAQUS simulation software; Step S7: Check the distorted grid on the cutting path, and perform local manual adjustment or local re-seeding; Step S8: Establish a right-angle cutting simulation model assembly drawing, conduct cutting experiments, and obtain data. Beneficial Effects

[0005] 1. Compared with other simulation modeling methods, the cutting parameter prediction of the present invention is closer to the actual value.

[0006] 2. The present invention proposes a right-angle cutting simulation method based on the actual metallographic crystal structure at a mesoscopic scale, thereby obtaining a right-angle cutting simulation method with more accurate cutting force simulation and temperature diffusion closer to the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A flow chart of a right-angle cutting simulation method based on mesoscopic metallographic structure proposed by the present invention; Figure 2 This is the real metallographic structure picture obtained by processing C45 just in step S1 of the present invention; Figure 3 This is a binary processing image of the real metallographic structure of C45 steel based on step S2 of the present invention; Figure 4 The processing result of C45 steel by ABAQUS software based on step S4 of the present invention; Figure 5 The grid division result based on step S5 of the present invention; Figure 6 It is an assembly diagram of the right-angle cutting simulation model of the present invention; Figure 7 The cutting force simulation results of this model are compared with the results of other simulation methods, where Model Ⅰ is the C45 homogeneous material model, Model Ⅱ is the conventional rectangular grain multiphase model, Model Ⅲ is the adjusted rectangular grain model, Model Ⅳ is the Voronoi grain model, and Model Ⅴ is the real metallographic structure grain model. DETAILED DESCRIPTION

[0008] Reference Figure 1 , a right-angle cutting simulation method based on mesoscopic metallographic structure, the method comprises the following steps: Step S1: The workpiece material to be predicted is placed under a metallographic microscope to analyze the mesoscopic crystal structure, measure the size of each crystal structure, and obtain a mesoscopic real metallographic structure image.

[0009] Step S2: Import the real metallographic structure image into Auto CAD software, adjust the contrast, and perform binarization processing on the metallographic structure image.

[0010] Step S3: Import the binarized image into the sketch editing module of Solidworks software, and obtain the sketch framework of boundary extraction after processing.

[0011] Step S4: Import the sketch model through ABAQUS, perform regional segmentation on the workpiece matrix, and simplify the real model appropriately.

[0012] Step S5: using a constitutive relationship model and failure criterion of a suitable simulation material, and assigning different material properties in comparison with the binarized metallographic results.

[0013] Step S6: Use the Mesh module in the ABAQUS simulation software to divide the geometric model into meshes.

[0014] Step S7: Check the distorted mesh on the cutting path, and make local manual adjustments or re-seeding.

[0015] Step S8: Establish a right-angle cutting simulation model assembly drawing, conduct cutting experiments, and obtain data.

[0016] C45 steel was used as the workpiece material for experimental verification and comparison.

[0017] The material is placed under a metallographic microscope to analyze the mesoscopic crystal structure and obtain a mesoscopic real metallographic structure picture, such as Figure 2 .

[0018] The metallographic structure image is binarized, such as Figure 3 .

[0019] Import the sketch model through ABAQUS, divide the pearlite and ferrite into regions, and simplify the processing, such as Figure 4 .

[0020] Select the constitutive parameters of different workpiece matrices, as shown in Table 1.

[0021]

[0022] The constructed real metallographic structure model is meshed, such as Figure 5 .

[0023] Create a right-angle cutting assembly drawing, such as Figure 6 . And compare the simulation data with other simulation methods.

[0024] Compared with other simulation modeling methods, the cutting parameter prediction of the present invention is closer to the real value, such as Figure 7 .

Claims

1. A right-angle cutting simulation method based on mesoscopic metallographic structure, characterized by: The method comprises the following steps: Step S1: placing the workpiece material to be predicted under a metallographic microscope to analyze the mesoscopic crystal structure, measuring the size of each crystal structure, and obtaining a mesoscopic real metallographic structure image; Step S2: importing the real metallographic structure picture into Auto CAD software, adjusting the contrast, and performing binarization processing on the metallographic structure picture; Step S3: Import the binarized image into the sketch editing module of Solidworks software, and obtain a sketch framework for boundary extraction after processing; Step S4: Import the sketch model through ABAQUS, perform regional segmentation on the workpiece matrix, and perform appropriate simplification on the real model; Step S5: using a constitutive relationship model and failure criteria of a suitable simulation material, and assigning different material properties in comparison with the binarized metallographic results; Step S6: Mesh the geometric model in the Mesh module of the ABAQUS simulation software; Step S7: Check the distorted grid on the cutting path, and perform local manual adjustment or local re-seeding; Step S8: Establish a right-angle cutting simulation model assembly drawing, conduct cutting experiments, and obtain data.

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