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Bolt design method

A design method and bolt technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problem of no-angle tightening specification output, regardless of bolt production status, stay, etc.

Inactive Publication Date: 2018-06-08
DEUTZ DALIAN ENGINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The bolt design method in the bolt industry basically stays at an earlier stage, which is not accurate enough, does not consider the actual production status of the bolt, and cannot output the tightening specification output such as the rotation angle method.

Method used

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Embodiment Construction

[0029] The bolt design method of the present invention calculates according to the actual friction coefficient of the bolt, that is, the actual production status of the bolt. At the same time, the load range is calculated according to the contact surface and sealing requirements, and the bolt type selection (including bolt specifications, strength grade, bolt head shape), the design of the axial force relief coefficient, and the bolt axial force and torque tolerance analysis are realized. Finally, the tightening specification is output, and the tightening threshold torque and rotation angle are output in the rotation angle method. Specific steps are as follows:

[0030] 1. CAE finite element simulation of the connection structure, the force analysis of the bolt position, determine the output axial force Famax (N) and shear force Fshear (N) and the load required for the sealing function.

[0031] 2. Determine the boundary parameters, the axial force Famax (N), the shear force Fshea...

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Abstract

The invention relates to a bolt design method. The method comprises the following steps that 1, stress analysis is conducted on the bolt structure position by means of CAE, and load needed by axial acting force, shearing acting force and the sealing function is determined; 2, the bolt specification is selected according to the experienced diameter-length ratio, a proper bolt head is selected through the type of the supporting surface of a bolt; 3, the friction coefficient range of the bolt is designed, and an assembly preload target value is calculated; 4, the bolt strength grade and the tightening strategy are determined according to the preload target value; 5, the proper bolt specification and the tightening strategy are determined finally. Accordingly, calculation is conducted according to the friction coefficient of the specific bolt, that is to say, the actual production condition, bolt type selection, security coefficient setting, tolerance analysis and bolt tightening specification establishing are achieved, and the method is applicable to a torque method, a corner method and a yield point method of the bolt.

Description

Technical field [0001] The invention relates to the technical field of bolt design. Background technique [0002] The bolt design method in the bolt industry basically stays at an early stage, is not accurate enough, does not consider the actual production state of the bolt, and cannot output the tightening specification output such as the corner method. Summary of the invention [0003] In order to solve the above-mentioned problems existing in the existing bolt design method, the present invention provides a bolt design method. [0004] The technical solution adopted by the present invention to achieve the above objective is: a bolt design method, including the following steps: [0005] (1) Analyze the force of the bolt position to determine the axial force (Famax) and shear force (Fshear); [0006] (2) Choose bolt specifications according to the diameter-to-length ratio, and select the appropriate standard bolt head according to the type of bolt supporting surface; [0007] (3) Desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 刘超邢宏杰
Owner DEUTZ DALIAN ENGINE
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