Method for computing module of local area of casting piece
A technology of local area and calculation method, applied in the fields of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of low precision, inconvenient use, and no simple automatic calculation method of non-heat-dissipating surface area, etc. Improve accuracy and efficiency, prevent casting defects, improve the effect of precision
Inactive Publication Date: 2010-06-09
SHANDONG UNIV
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[0004] For the calculation of the modulus of the local area of the casting, previous studies mostly used manual instructions or estimation methods to specify the non-radiating surface, which is not convenient and accurate, and there is no simple and effective automatic calculation method for the area of the non-radiating surface. There is no mature local area modulus automatic calculation method or formula
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] figure 1 Among them, A1 is the casting model, A2 is the inclusion body, A3 is the result model of the Boolean difference operation (casting model minus the inclusion body) between the casting model and the inclusion body, and A4 is the result model of the Boolean intersection operation between the casting model and the inclusion body.
[0025] against figure 1 , the modulus of a local region of a 1 / 8 sphere whose diameter is the cube side length at the vertices of the cube casting will be calculated using the algorithm proposed in this paper.
[0026] 1) In the 3D CAD software, use the modeling function to complete the 3D modeling of the casting A1; the casting A1 is a cube with a side length of 10 cm;
[0027] 2) Use the surface area calculation function of CAD software to calculate the surface area A of the casting A1 铸件 =600cm 2 ;
[0028...
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The invention discloses a method for computing the module of the local area of a casting piece. The method comprises steps of: firstly performing three-dimensional modeling to the casting piece with three-dimensional CAD software and secondly making a three-dimensional geometrical shape in the CAD software, wherein the geometrical shape is intersected with the casting piece, and the intersection part is the local area, the module of which needs to be computed, i.e. the local area of the casting piece is selected by the three-dimensional geometrical shape, wherein the three-dimensional geometrical shape is called as a containing body, therefore, the module computation formula of the local area, which is defined by the containing body and the casting piece, is as follows: M local=V intersection / [A intersection-(A intersection+A error-A casting piece) / 2], wherein the M local is the module of the local area of the casting piece; the V intersection is the volume of a result model which is obtained by the booleans of the casting piece model and the containing body; the A intersection is the surface area of a result model which is obtained by the booleans of the casting piece model and the containing body; the A error is the surface area of the result model which is obtained by the Booleans (the casting piece model deducts the containing body) of the casting piece model and the containing body; and the A casting piece is the surface area of the casting piece model.
Description
technical field [0001] The invention relates to a method for calculating the modulus of a local area of a casting. technical background [0002] Reasonable casting process design is essential to produce castings of acceptable quality. The riser is a structure artificially set in the mold to store the molten metal, which is used to compensate the possible shrinkage during the casting process and prevent casting defects such as shrinkage porosity and shrinkage cavity. It is the design of the casting process. important content. The modulus of the casting as a whole or in a local area is a key parameter in the riser design and calculation process. [0003] The modulus (M) of the casting is defined as the ratio of the casting volume (V) to the area of the cooling surface (A), that is, M=V / A. For the calculation of the overall modulus of the casting, all surfaces of the casting are heat dissipation surfaces, that is, the area of the heat dissipation surface is equal to th...
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IPC IPC(8): G06F17/50
Inventor 田学雷张凯徐岩郑洪亮孙玉成
Owner SHANDONG UNIV