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A method for manufacturing a bionic automobile tail fin shell

A manufacturing method and bionic technology, applied in manufacturing tools, additive manufacturing, design optimization/simulation, etc., can solve problems such as inability to exhibit aerodynamic performance, achieve good aerodynamic characteristics, improve ride comfort, and wind resistance The effect of small coefficients

Inactive Publication Date: 2020-02-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the test shows that the shark-style tail fin does not show good aerodynamic performance in the wind tunnel test. The main reason is that the design of the shark-style tail fin mainly considers its appearance and signal reception, and does not give too much consideration its aerodynamic performance
In addition, sharks are aquatic animals, and their tail fins may have good drag and noise reduction performance in water (that is, have good fluid performance), but they may not have good aerodynamic properties in the air

Method used

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  • A method for manufacturing a bionic automobile tail fin shell
  • A method for manufacturing a bionic automobile tail fin shell
  • A method for manufacturing a bionic automobile tail fin shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The manufacturing method of the bionic car tail fin shell with sparrow beak geometry feature of the present invention comprises the following steps:

[0032] (1) Collection of sparrow mouth characteristics: Obtain several adult sparrows, and screen out sparrows with completely exposed mouth features and complete appearance. Cut it open, and draw the outer contour curve of the sparrow's beak longitudinal section on the coordinate paper (see figure 1 ); there are two outer contour curves of the characteristic longitudinal section of the sparrow mouth drawn, i.e. the upper contour curve O and the lower contour curve I, and then use the least squares method to fit the directrix equation of the mouth characteristic longitudinal section contour curve O ( Formula 1-1);

[0033]

[0034] (2), the establishment of the bionic model of the caudal fin shell: the directrix equation of the contour curve O on the longitudinal section of the step (1) is imported into SolidWorks to ...

Embodiment 2

[0038] Step (1) and step (2) are with embodiment 1;

[0039] Step (3), preparation of the caudal fin shell: Design a mold matching it according to the bionic caudal fin shell model built in step (2), and then use carbon fiber reinforced resin-based composite materials for preparation. The carbon fibers used are laid by mixing three layers of fibers and into; among them, the laying angle of the three-layer fiber layer from top to bottom is [90 / 45 / 0] (see Figure 10 ), the 0 degree direction is the lateral direction of the caudal fin.

Embodiment 3

[0041] In order to reduce the drag coefficient of the tail fin of the car and further expand the application range of the bionic tail fin, the bottom of the bionic model of the tail fin of the car designed by the present invention can be cut arbitrarily according to the needs of the vehicle model, and the purpose is to make the tail fin fit closer to the roof; at the same time, it can The top of the bionic model is rounded and cut, and the bionic car tail fin shell with rounded corners and bottom cut is made, which specifically includes the following steps:

[0042] Step (1) is with embodiment 1;

[0043] Step (2), after establishing the first contour line L and the second contour line M and setting out the boss, establish the cutting contour line in the plane of the reference plane Z=0; the cutting contour line is formed by the sixth arc HJ , composed of the fourth straight line HK and the fifth straight line KJ (see Figure 7 ); For example: in order to make the bottom of t...

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Abstract

The invention relates to a bionic automobile tail fin housing manufacturing method, which comprises the steps of (1) collecting the features of a sparrow's mouth: drawing the longitudinal profile outer contour curve of a sparrow's mouth on a coordinate paper; fitting a longitudinal profile upper contour curve quasi - equation of a sparrow's mouth (formula 1-1); (2) establishing a tail fin housing bionic model: importing the longitudinal profile upper contour curve quasi - equation into SolidWorks to form a bionic curve EF; establishing a datum plane X=151 at the position passing the point E vertical to the bionic curve EF; and establishing a first contour line L in the datum plane; establishing a second contour line M in the datum plane Y=0 plane passing the point F; sampling the first contour line L toward the second contour line M along the bionic curve EF and a straight line VY; establishing a cutting contour line in the datum plane Z=0 for cutting; and then shelling to obtain the bionic model; (3) preparing the tail fin housing: using a model or printing with a 3D printer directly. The tail fin prepared thereby can improve fuel economy and integral streamline greatly.

Description

technical field [0001] The invention relates to an automobile tail fin, in particular to a method for manufacturing a bionic automobile tail fin shell. Background technique [0002] As a function and decorative part of automobiles, automobile tail fins are more and more popular and respected by the public. The tail fin has the functions of releasing static electricity, amplifying communication signals, disrupting the flow, and improving the accuracy of the GPS system. It also has the functions of radio FM antenna, GSM communication antenna, GPS antenna, etc.; the tail fin can also effectively eliminate air flow noise, making driving more quiet, Highlight luxury, three-dimensional personality. When the weather is dry, cars tend to generate static electricity. In the early days, static electricity was released by installing mopping chains at the exhaust pipe. With the tail fin antenna, this problem has been solved efficiently. The tail fin antenna makes full use of the charac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15B29C70/30B29C64/00B33Y80/00
CPCB29C70/30B33Y80/00G06F30/15G06F30/20
Inventor 马芳武倪利伟蒲永锋梁鸿宇
Owner JILIN UNIV
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