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A 3D Flexibility Modeling Method Applied to Spring Production and Assembly

A modeling method and three-dimensional flexible technology, applied in 3D modeling, special data processing applications, image data processing, etc., can solve the problems of easy errors in factory production, failure to realize separation spring simulation, etc., and achieve clear production and assembly Effect

Active Publication Date: 2017-07-07
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If each state corresponds to a three-dimensional model of the spring, factory production is prone to errors, and the simulation of the working process of the separation spring cannot be realized

Method used

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  • A 3D Flexibility Modeling Method Applied to Spring Production and Assembly
  • A 3D Flexibility Modeling Method Applied to Spring Production and Assembly
  • A 3D Flexibility Modeling Method Applied to Spring Production and Assembly

Examples

Experimental program
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Embodiment Construction

[0024] Assume that the two ends of the spring wire are ground together tightly, the diameter of the spring wire is d=10mm, the free height H0=300mm, the two ends are closely ground together by m=3 / 4 turns, the total number of turns is N=15, and the number of effective turns is n=13.

[0025] The flow chart of the present invention is as figure 1 As shown, the specific content is as follows:

[0026] Using the helical scanning method to establish the flexible three-dimensional model of the spring when both ends are tight and not ground, such as figure 2 As shown, the height of the parallel tight part at both ends of the spring is d=6.25mm, the pitch of the parallel tight part at both ends p1=d=10mm, the transition part is 0.2mm, and the height L3 of the effective coil part satisfies

[0027] L3=H0-2×(1-m)×d-2×1 / 2×d (1)

[0028] The pitch p2 of the effective number of coils of the spring satisfies

[0029] p2=L3 / n (2)

[0030] According to the formula (1), the height L3 of ...

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Abstract

The invention discloses a three-dimensional flexible modeling method applied to spring production and assembly. The method is a parameter-driven modeling method. By establishing a three-dimensional model of the spring, the free state and the compressed state of the spring are simultaneously realized. Control, compared with the traditional technology of the part model and the assembly model as two separate models, the invention can guide the production and assembly more clearly, and lay the foundation for the mechanism kinematics simulation of the launch vehicle separation spring assembly.

Description

technical field [0001] The invention relates to a three-dimensional flexible modeling method for producing and assembling flat springs with parallel ends, which is applied to a launch vehicle separation system and belongs to the field of launch vehicle overall design. Background technique [0002] The spring is an important component in the separation system of the launch vehicle. It is customarily called the separation spring. Generally, the spring with both ends tightened and ground flat is used. The parts at both ends of the flat ground spring are parallel parts, and the middle part is the standard spring pitch part. The new generation of launch vehicles fully adopts three-dimensional models instead of traditional two-dimensional drawings to transmit design intentions and guide factory production. The separation spring parts are in a free state during production, however, the state of the separation spring components assembled on the launch vehicle body structure is compr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/00
Inventor 顾名坤刘立东张然吴洁李莉徐西宝
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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