Strength analysis of locating hole in the hottest

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Strength analysis of positioning holes in painting process

Abstract: the strength of painting holes is an important factor affecting the smooth progress of body in white painting process. This paper introduces the application of tran direct transient method in the strength analysis of painting holes of a vehicle model, and optimizes the structural design of painting holes through CAE analysis

key words: coating hole strength cae

1 Introduction

in the production of the coating process, the body in white bears the weight of the body in white from different angles and the weight of the coating fluid when it rotates. Therefore, when the strength of the coating hole is not enough, the vector control switch under the machine will drive the rotating shaft through the transmission belt, causing the body to fall into the electrophoresis pool, affecting the smooth progress of the coating process. This paper mainly analyzes the strength of the coating hole at different angles of the body in white when it is overturned in the coating production electrophoresis process

2. Nastran based direct transient response analysis of automobile coating holes

taking a project development as an example, this paper uses the direct transient response analysis of tran sol109 to simulate whether the coating holes can meet the production and design requirements in the body in white coating process, and provides reasonable optimization opinions

2.1 introduction to painting process

this paper aims at the overturning process of body in white in the electrophoresis process of painting electrophoresis pool, and its overturning process is shown in the following figure:

Figure 1 Schematic diagram of painting process

2.2 model file

this paper mainly analyzes the force on the painting hole of body in white in the process of painting production electrophoresis process, The following is the painting hole diagram of a certain vehicle model:

Figure 2 painting hole diagram

2.3 boundary conditions and analysis methods

in this analysis, the local part of the painting hole is constrained, and a certain overload coefficient is considered considering the influence of electrophoretic fluid

Figure 3 wheel finite element analysis model

in order to simulate the rotation process of the car body in the point pool, this analysis adopts so please be sure to turn off the power L109 for analysis, and consider to realize the force rotation by multiplying two loads with equal size in Y and Z directions by two sine and cosine curves respectively

2.4 analysis results

through transient analysis, it is concluded that the maximum stress of the body in the overturning process appears on the front coating fixing hole, the maximum stress appears on the body at 15 degrees and 195 degrees, and the stress value is 332mpa

Figure 4 body turnover angle and maximum stress diagram

Figure 5 maximum stress diagram of body front coating hole

2.5 optimization of analysis results

from the calculation results, the maximum stress at the coating hole is 332mpa, which is greater than its tensile strength of 300mpa, resulting in the deformation of the fixed hole before coating. After adding a 3mm thick stiffener at the coating hole, the maximum stress is reduced to 188mpa

Figure 6 maximum stress diagram of front coating hole of car body

3 Conclusion

1. Through the direct transient response analysis of tran, the structural weakness of the coating hole in the electrophoresis process can be accurately obtained, and the structure can be optimized and improved

2. The application of CAE method in scheme design can effectively avoid potential problems, effectively regulate the degradation time and cycle of bioplastics, and obtain a design scheme with comparative advantages. The optimized structure has been adopted, and has been verified by road tests to meet the use requirements


[1] stran basic training course Science Press, 2005

[2 you have to replace a new belt] new MD NASTRAN finite element example tutorial, China Machine Press, 2007 (end)

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