Modeling and simulation method for hot-melt self-tapping riveting joint
A technology of hot melt self-tapping and simulation method, which is applied in design optimization/simulation, geometric CAD, computer-aided design, etc., to achieve good consistency and reduce modeling workload.
Active Publication Date: 2020-04-28
CHINA FIRST AUTOMOBILE
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[0006]
The purpose of the present invention is to provide a method for modeling and simulation of hot-melt self-tapping riveted joints to solve the problem of accurate establishment and simulation of the three-dimensional model of hot-melt self-tapping riveted joints
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[0027] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for ease of description, the drawings only show a part but not all of the structure related to the present invention.
[0028] The invention provides a method for modeling and simulation of hot melt self-tapping riveted joints, such as figure 1 As shown in the process, the modeling and simulation method includes the following steps:
[0029] In the first step, the three-dimensional model of the hot-melt self-tapping riveting joint is obtained through the simulation of the hot-melt self-tapping riveting forming, and the temperature distribution cloud map during the forming process is extracted.
[0030] The hot-melt self-tapping riveting forming process is simulated, and the hot...
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The invention belongs to the technical field of hot-melt self-tapping riveting, and discloses a modeling and simulation method for a hot-melt self-tapping riveting joint. A three-dimensional model ofa hot-melt self-tapping riveting joint is obtained through hot-melt self-tapping riveting forming simulation, and a temperature distribution cloud picture in the forming process is extracted; the temperature distribution cloud chart is divided into a plurality of temperature intervals, and the width corresponding to each temperature interval is extracted; and hardness detection is performed on theriveted joint of each temperature interval, the riveted joint material constitutive model database of each temperature interval is updated, and the updated riveted joint material constitutive model database is applied to each area of the corrected hot-melt self-tapping riveted joint original model to obtain a hot-melt self-tapping riveted joint model. According to the method, an accurate rivetedjoint three-dimensional model can be obtained while the modeling workload is reduced to a great extent, the bearing and deformation behaviors of the material in finite element analysis can be described more accurately, and the consistency of a simulation result and a test result is good.
Description
Technical field [0001] The invention relates to the technical field of hot-melt self-tapping riveting, in particular to a method for modeling and simulating a hot-melt self-tapping riveting joint. Background technique [0002] With the development of new energy vehicles and the development trend of lightweight body-in-white, aluminum alloys are more and more widely used. Therefore, it is difficult to implement traditional spot welding in the connection of dissimilar materials. [0003] Hot-melt self-tapping riveting is a new type of dissimilar material connection technology. Its principle is that the high-speed rotating rivet rubs and softens the plate. Under the combined action of downward pressure and torque, the rivet drills threads inside the plate to form a tight threaded connection . Hot-melt self-tapping has technical advantages such as simple process, clean processing, unilateral connection, high joint strength, high flexibility in material combination, and easy repair. It...
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Login to View More IPC IPC(8): G06F30/20G06F30/17G06F119/08
Inventor 籍龙波朱学武曹正林杨航芦强强丁建鹏
Owner CHINA FIRST AUTOMOBILE