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Passenger car bumper mask assembly clearance control method

A technology of assembly gap and control method, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve problems such as mold scrapping, high mold cost, economic loss, time cost loss, etc., to reduce development costs, The effect of cooling system optimization and process parameter optimization

Active Publication Date: 2021-05-07
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For relatively large injection molded parts such as passenger car bumpers, the mold cost is very high. The rationality of the part structure and process parameters is very important for the injection molding of bumpers. In the worst case, the parts cannot be injection molded. Abandoned molds will cause huge economic losses and time cost losses

Method used

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  • Passenger car bumper mask assembly clearance control method

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Experimental program
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Embodiment

[0045] refer to figure 1 , a passenger car bumper face shield assembly gap method based on mold flow-structure co-simulation, including the following steps:

[0046] S1: Use the pre-processing software hypermesh to establish the neutral surface mesh of the bumper face. The reference size of the neutral surface mesh is controlled to 8mm, and the aspect ratio is controlled to ≤20. There must be no duplication and connection of problematic units.

[0047] S2: Import the neutral plane grid of the bumper face into the mold flow analysis software moldflow, and complete the coordinate system conversion if necessary, and the mold opening direction is the Z direction.

[0048] S3: The pouring system modeling is completed, the runners are modeled with column elements, the gates are cold gates, and the runners maintain reasonable connectivity.

[0049] S4: Complete the cooling waterway modeling, set the corresponding attributes, and input the injection molding process parameters.

[0050...

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PUM

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Abstract

The invention discloses a passenger car bumper assembly clearance control method, which comprises the following steps of: performing analog simulation on a bumper injection molding process, performing design optimization on a bumper structure, predicting potential quality problems such as surface defects and weld lines, and optimizing process parameters to control deformation generated after bumper injection molding, finally, mapping the MOLDFLOW strain simulation result into structure simulation software ABAQUS by utilizing third-party software HELIUS, predicting and evaluating whether an assembled gap meets a design tolerance or not by simulating an assembly process, and if not, performing optimization through structure and process parameters and the like to finally obtain a bumper product meeting the tolerance requirement, so that development efficiency of the product is improved and product development cost is reduced.

Description

technical field [0001] The invention relates to a method for controlling the assembly gap of a bumper face cover of a passenger car, in particular to a method for controlling the assembly gap of a bumper face cover of a passenger car based on mold flow-structure joint simulation, and belongs to the technical field of vehicle design and simulation. Background technique [0002] With the demand for lightweight cars and the importance of car styling, more and more auto parts use plastic parts to replace traditional metal parts. The advantages are light weight, high integration, and free shape. The structure can basically be manufactured, and the manufacturing of plastic parts has higher requirements than traditional metal parts: reasonable structure of parts, reasonable material selection, reasonable mold design, suitable injection molding process parameters, good after injection molding The appearance and more accurate size and so on. [0003] For relatively large injection m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23
CPCG06F30/15G06F30/23Y02T10/40
Inventor 于保君曹正林肖永富张雨杜伟娟马明辉高猛李景潭刘启龙
Owner CHINA FIRST AUTOMOBILE
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