A hot stamping process making method
A hot stamping and process technology, applied in the metallurgical field, can solve the problems of long test cycle, high test cost, and large consumption of computing resources, and achieve the effects of less test cost, short test cycle, and high test equipment penetration rate.
Active Publication Date: 2019-06-28
BENGANG STEEL PLATES
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Problems solved by technology
This method can give full play to the maximum deformation capacity of the material. However, due to the large selection range of stamping temperature and stamping speed, there are many combination conditions and a huge workload.
If it is a part with a complex shape, the amount of calculation is also quite huge, which will consume a lot of computing resources and a long calculation time
In addition, due to the small number of equipment capable of measuring the high-temperature forming limit curve, the test cost is high and the test cycle is long
[0006]The above two methods have their limitations. The first method cannot exert the maximum deformation capacity of the material itself, and is only applicable to steel materials
Method 2 is a huge amount of work, costly and time consuming
Therefore, neither method can quickly and cheaply determine the optimal thermoforming process for a material
Method used
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[0033] The invention provides a method for formulating a hot stamping process, comprising the following steps:
[0034] Step 1, using 3D modeling software, such as UG and CATIA, etc., to establish the geometric model of stamping parts ( figure 2 ), and input the geometric model into the finite element simulation software;
[0035] Step 2: Select the material constitutive equation in the form of Equation (1) in the finite element simulation software, select 4 n values with appropriate intervals, and perform numerical simulation of the stamping process in sequence. In this example, select 0.10, 0.15, 0.20 and 0.30, and then Four simulations were carried out. After the stamping is completed, the calculation results of the equivalent plastic strain field are shown in Table 1;
[0036] σ=K·ε n (1)
[0037] Table 1 Calculation results of equivalent strain field
[0038]
[0039] Step 3: Take the value of n as the ordinate, and the maximum value of the equivalent plastic s...
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The invention provides a hot stamping process making method which comprises the following steps: step 1, establishing a geometric model of a part by utilizing three-dimensional modeling software; step2, selecting a material constitutive equation in finite element simulation software, selecting a plurality of n values at appropriate intervals, sequentially carrying out numerical simulation on thestamping process, and recording the maximum value of the equivalent plastic strain; step 3, drawing data points by taking the n value as a vertical coordinate and the equivalent maximum value as a horizontal coordinate, and fitting the data points to obtain a curve which is regarded as a stamping criterion curve; step 4, obtaining n-eplison curve under various deformation conditions by using a tensile experiment method; step 5, comparing the curve with a stamping criterion curve to obtain the optimal hot stamping forming process parameters of the metal material. The method is suitable for allmetal materials and has the advantages of being short in test period, low in test expenditure, high in test equipment popularizing rate and the like.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for formulating a hot stamping process. Background technique [0002] The hot stamping process refers to the stamping process that is stamped and deformed in a high temperature environment, and then cooled rapidly. It is mainly used for the production of high-strength parts required for automobile sound. Compared with the original cold stamping, the hot stamping forming process has deformation The resistance is small, the plate is not easy to crack, the stamping precision is high, and the springback after stamping deformation is small. Stamping temperature and deformation rate are the two most critical process parameters of the hot stamping forming process. If the process parameters are selected unreasonably, the sheet metal is prone to stamping cracking, so these two process parameters are of crucial significance for hot stamping deformation. [0003] At present, t...
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IPC IPC(8): G06F17/50G06F17/11
Inventor孟庆刚赵广东王鲁宁郭晶王亚芬韩丹王立刚
OwnerBENGANG STEEL PLATES