Analysis method of durability of solder joints in commercial vehicle cab
An analysis method and technology for commercial vehicles, applied in special data processing applications, instruments, geometric CAD, etc., can solve problems such as poor solder joint unit quality, inaccurate stress simulation at solder joints, and inaccurate solder joint durability analysis results. , to improve the accuracy and avoid the effect of simulation inaccuracy
Active Publication Date: 2022-05-31
DONGFENG COMML VEHICLE CO LTD
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Problems solved by technology
[0009] 1. Since the hexahedron plus rigid element model is only suitable for simulating the situation when the shape of the plate element of the base metal where the solder joint is located is a plane, it is not suitable for simulating the situation that the shape of the plate element of the base metal where the solder joint is located is a curved surface. When the panel and corner arc transition, the quality of the solder joint unit obtained by modeling is poor;
[0010] 2. Due to the poor quality of the solder joint unit modeled on the curved plate and the transition of the corner arc, the stress simulation at the solder joint is inaccurate, which further leads to inaccurate results of the durability analysis of the solder joint
Method used
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[0061] r=1.5*(D / 2+d) (1)
[0066] S100. Establish a finite element model of the body of the commercial vehicle.
[0068] S110. Establish a CAD model for the base material and other parts of the vehicle body respectively.
[0071] If the shape of the plate element where the solder joint is located is a plane, the solder joint element is a hexahedron plus a rigid element model.
[0072] If the shape of the plate element where the solder joint is located is a curved surface, the solder joint element is a three-layer hexahedron model.
[0073] The solder joint unit includes warpage and inclination.
[0077] S210. Create a unique corresponding CAD model for each solder joint one by one.
[0080]
[0081]
[0082]
[0086]
[0087] Then according to formula (2), (3) and (4) can be calculated: a=6, b=3, c=3.
[0094] Otherwise, the inspection result of the current solder joint unit is set as "satisfying the quality standard".
[0097] S300 is performed from the beginning until all the ins...
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The invention relates to a method for analyzing the durability of solder joints in a commercial vehicle cab. quality standard”, then re-establish the solder joint unit to replace the current solder joint unit; until all the inspection results are “meet the quality standard”; calculate the solder joint unit force of each solder joint unit; calculate the welding point of each solder joint Spot life; compare each solder joint life with the solder joint durability threshold one by one: if the solder joint life of all solder joints is not lower than the solder joint durability threshold, the analysis result is "meets the vehicle durability requirements"; otherwise, "Does not meet vehicle durability requirements". The invention improves the quality of the solder joint unit at the transition of the curved plate and the corner arc; improves the accuracy of the durability analysis result of the solder joint; the calculation result does not depend on the grid itself; avoids the inaccurate stress simulation at the solder joint The problem.
Description
Analysis method of solder joint durability of commercial vehicle cab technical field [0001] The present invention relates to the technical field of automobile design, in particular to a method for analyzing the durability of solder joints in commercial vehicle cabs. Background technique In commercial vehicles, the role of solder joints is to form part of the material of the cab of the commercial vehicle, especially the base metal, to weld The form of connection is fixedly connected together. The welding point is the bearing point of the commercial vehicle cab, and its firmness is important for the life, Security is paramount. Therefore, in the structural design process of commercial vehicles, an important design work is to arrange the solder joints design. The so-called solder joint layout design is a set of design about the specific positions of all solder joints involved in the cab of a commercial vehicle. Program. Because when the commercial vehicle is actua...
Claims
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IPC IPC(8): G06F30/15G06F30/23G06F119/14
CPCG06F30/15G06F30/23G06F2119/14Y02T90/00
Inventor 王红耿广锐陈龙刘道勇谢庆喜张杨李智勇
Owner DONGFENG COMML VEHICLE CO LTD