High-speed grinding temperature prediction method for particle reinforced titanium-based composite material

A titanium-based composite material and particle-reinforced technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of reduced wear resistance, aggravated grinding wheel wear, shortened service life, etc., to achieve accurate prediction results, Ease of obtaining results and reducing the amount of experiments

Pending Publication Date: 2019-07-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

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Problems solved by technology

As a result, the dimensional and shape accuracy of the parts is not up to standard, the fatigue resistance is deteriorated, the wear resistance is reduced, the service life is shortened, and the reliability is reduced. In addition, it also increases the wear of the grinding wheel
Excessive grinding temperature has become a major obstacle to the expansion of high-speed grinding applications

Method used

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  • High-speed grinding temperature prediction method for particle reinforced titanium-based composite material
  • High-speed grinding temperature prediction method for particle reinforced titanium-based composite material
  • High-speed grinding temperature prediction method for particle reinforced titanium-based composite material

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Experimental program
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Effect test

Embodiment 1

[0045] In this embodiment, the specific steps are as follows:

[0046] Step 1: Statistics on the distribution of TiC reinforced particles in titanium matrix composites

[0047] Through the professional image processing software ImageJ, the microstructure of PTMCs captured by the scanning electron microscope was converted into a binary image, such as figure 2 (b), where white represents the Ti-6Al-4V matrix material, and black represents TiC reinforcing particles. Then extract the outer contour curve of TiC particles in the binary image, and solve the centroid map of the reinforced particles, and finally calculate the equimoment equivalent ellipse of the reinforced particle TiC, the result is as follows figure 2 (d) shown. The calculation method is as follows:

[0048] The boundary of TiC particles is expressed as f(x,y) in the rectangular coordinate system xoy, then the geometric moment of the irregular curve can be expressed as formula (1):

[0049]

[0050] The area e...

Embodiment 2

[0077] Embodiment 2 verification test

[0078] In order to further verify the advantages of the three-dimensional composite finite element model in predicting the grinding temperature, the present invention uses a simulation model (three-dimensional homogeneous material simulation model) after the properties of the particle-reinforced titanium-based composite material to be homogenized to simulate the grinding temperature field. Simulation analysis and comparison. Establish a homogeneous model with a length of 6 mm, a height of 1 mm, and a width of 0.1 mm, and assign the following material properties to the workpiece model after dividing the grid. Using the same boundary conditions, the calculated temperature cloud diagram is as follows: Figure 9 Shown, (a) simulation temperature T = 456 ℃ (v w =6m / min, v s =120m / s, a p =20μm); (b) simulation temperature T=730°C (v w =6m / min, v s =120m / s, a p =40μm); (c) simulation temperature T=981°C (v w =6m / min, v s =120m / s, a p =...

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Abstract

The invention provides a high-speed grinding temperature prediction method for particle reinforced titanium-based composite material, which belongs to a transient heat transfer simulation analysis method and comprises the following steps: 1, counting the distribution law of reinforced particles in the particle reinforced titanium-based composite material; 2, performing finite element simulation modeling on the three-dimensional composite material; 3, setting finite element simulation boundary conditions; and 4, performing simulation analysis and verification on the three-dimensional temperature field. The method can predict the grinding temperature of the titanium-based composite material and has the advantages of being higher in accuracy, higher in calculation efficiency and the like compared with an existing method. By means of the method, the high-speed grinding temperature of the particle reinforced titanium-based composite material can be accurately predicted, and basic data and theoretical support are provided for avoiding grinding burn and improving the grinding quality.

Description

technical field [0001] The invention provides a method for predicting the grinding temperature of a particle-reinforced titanium-based composite material, which relates to a transient heat transfer simulation analysis method and belongs to the technical field of finite element simulation. Background technique [0002] Particle-reinforced titanium matrix composites (hereinafter referred to as PTMCs) refer to a new type of material based on titanium or its alloys and compounded with carbon / boride. Considering the compatibility with the matrix material, carbon / borides with high modulus, high strength, high hardness and good high temperature performance are generally used as reinforcements, such as TiC, TiB 2 , SiC, B 4 C and TiB etc. Compared with titanium alloys, titanium matrix composites have better high temperature performance, corrosion resistance and fatigue performance. [0003] As a new type of composite material, PTMCs has the advantages of light structure, high str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/20
Inventor 丁文锋周欢李征徐九华傅玉灿苏宏华赵正彩杨长勇陈燕张全利
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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