Shape design method of special wrench for complex space

A design method and space technology, applied in computing, special data processing applications, instruments, etc., can solve the problem of low efficiency in the design of complex space wrenches

Active Publication Date: 2021-09-10
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention proposes a shape design method of a special wrench for complex spaces, which can effectively solve the problem of low design efficiency of wrenches in complex spaces by designing and optimizing the central axis of the profile of special-shaped wrenches

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  • Shape design method of special wrench for complex space

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Effect test

Embodiment 1

[0043] As the basic implementation mode of the present invention, the present invention includes a shape design method for a special wrench in a complex space, which mainly considers the accessibility of the tightening point in the complex space, the operator's operating torque, space interference and other factors, based on A-Star pathfinding Algorithm, construction of evaluation function to design and optimize the contour axis of special-shaped wrench. Specifically include the following steps:

[0044] a. Establish a complex space model to mark the tightening point and operation area;

[0045] b. Abstract the complex spatial model and build a discrete spatial map;

[0046] c. Process the discrete space map and mark the passable and impassable regions;

[0047] d. Build an evaluation function to convert the constraints of the wrench design into weights;

[0048] e. Use the pathfinding algorithm to select the optimal path of the evaluation function;

[0049] f. Smooth the ...

Embodiment 2

[0051] As a preferred embodiment of the present invention, the present invention includes a method for designing the shape of a special wrench for complex spaces, using a pathfinding algorithm to design a wrench for complex spaces, constructing the design constraints into an evaluation function, and obtaining a contour curve that is more in line with the requirements of use , including the following steps:

[0052] a. Establish a complex space model to mark the tightening point and operation area.

[0053] a 1 . Establish a three-dimensional model of the working area in equal proportions according to the actual space layout;

[0054] a 2 . Calculate the tightening torque of the wrench according to the required tightening force of the bolt; carry out the ergonomics analysis to obtain the magnitude of the tightening force manually applied in this working posture, and calculate the length of the tightening torque. The length of the tightening torque is from the force point to t...

Embodiment 3

[0076] As the best implementation mode of the present invention, with reference to the attached figure 1 , the present invention comprises a kind of shape design method of complex space special wrench, comprises the following steps:

[0077] a. Establish a complex space model to mark the tightening point and operation area.

[0078] A certain bolt needs to be tightened with a torque of 60N*m, and the working height is 1.2m. At this height, the maximum stable downforce of both arms of an adult is 150N. Therefore, the length of the wrench needs to be 60N*m / 150N=0.4m, and the working radius should be at least 0.4 Three-dimensional modeling is carried out on the outer contour of the spatial structure within m, the force application area is marked with blue (RGB value: 0, 0, 255), and the force point is marked with red (RGB value: 255, 0, 0). The color choice is black (RGB values: 0, 0, 0).

[0079] b. Abstract complex spatial models and build discrete spatial maps.

[0080] Det...

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Abstract

The invention relates to the technical field of mechanical design, in particular to a shape design method of a special wrench for a complex space, which comprises the following steps of: establishing a complex space model, and marking a tightening point position and an operation area; abstracting the complex space model, and establishing a discrete space map; processing the discrete space map, and marking a passable area and an impassable area; constructing an evaluation function, and converting constraint conditions of wrench design into weights; selecting an optimal path of the evaluation function by using a path-finding algorithm; and smoothing an path curve, and verifying whether interference exists in the space. By means of the design method, the contour central axis of a special-shaped wrench is designed and optimized, and the problem that the design efficiency of a wrench for complex space is low can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of mechanical design, in particular to a shape design method of a wrench special for complex spaces. Background technique [0002] With the improvement of equipment manufacturing level, the design of high-end electromechanical products such as automobiles, aircraft, ships, missiles, etc. is becoming more and more integrated and miniaturized. Inside the products, there are often areas where pipelines, cables, and parts are concentrated, that is, complex space. When manufacturing and repairing parts in complex spaces, it is usually necessary to use a wrench to install or remove bolts. However, due to the poor openness and narrowness of these areas, it is difficult to use a conventional universal wrench for operation, and it is usually necessary to design a special special-shaped wrench to complete the installation operation. [0003] The current special-shaped wrench is usually designed according to the expe...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06F30/17G06T17/05
CPCG06F30/17G06T17/05
Inventor周凡刘玉松陈振沈英东陈程杨二豪
OwnerCHENGDU AIRCRAFT INDUSTRY GROUP