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Method for performing simulating calculation on pre-clamping stress of three-grade gradually-changed rigidity plate spring equal-thickness main springs

A simulation calculation and pre-clamping technology, applied in the field of vehicle suspension gradient stiffness leaf spring, can solve the problem that the suspension three-level gradient stiffness leaf spring cannot be satisfied, so as to reduce design and test costs, speed up development, and improve design horizontal effect

Inactive Publication Date: 2018-04-24
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the research data, due to the constraints of the simulation calculation of the initial curvature radius of the first main spring after assembly and clamping, no accurate and reliable pre-clamping of the equal-thickness main spring of the three-level gradient stiffness leaf spring has been given before at home and abroad. The simulation calculation method of the tight stress, therefore, cannot meet the requirements of the rapid development of the vehicle and the modern CAD design of the three-stage gradient stiffness leaf spring of the suspension

Method used

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  • Method for performing simulating calculation on pre-clamping stress of three-grade gradually-changed rigidity plate spring equal-thickness main springs
  • Method for performing simulating calculation on pre-clamping stress of three-grade gradually-changed rigidity plate spring equal-thickness main springs
  • Method for performing simulating calculation on pre-clamping stress of three-grade gradually-changed rigidity plate spring equal-thickness main springs

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, the width of a certain three-stage gradient stiffness leaf spring is b=60mm, and the thickness of each main spring is equal, that is, the main spring is superimposed with equal thickness, and the modulus of elasticity E=200GPa, which is half of the straight section at the root clamped by the saddle bolt lengthL 0 = 50mm. The number of main reeds is n=3, the thickness of each main spring is h=8mm; half of the active length of each main spring is L 1T =525mm,L 2T =475mm, L 3T = 425mm, the design value of the free tangent arc height of each main spring is H g10 =86.7mm, H g20 =79.5mm, H g30 = 63.5 mm. According to the number of main reeds, elastic modulus, the structural parameters of each main spring and the design value of the free tangent arc height, the pre-clamping stress of each equal-thickness main spring after the three-stage gradient stiffness leaf spring is assembled and clamped Perform simulation calculations.

[0026] The simulation calcul...

Embodiment 2

[0046] Embodiment 2, the width b=63mm of a certain three-stage gradient stiffness leaf spring, the thickness of each main spring is equal, that is, the main spring is superimposed with equal thickness, and the elastic modulus E=200GPa, which is half of the straight section of the root clamped by the saddle bolt lengthL 0 = 55mm. The number of main reeds is n=2, the thickness of each main spring is h=9mm; half of the active length of each main spring is L 1T =525mm, L 2T = 470mm, the design value of the free tangent arc height of each main spring is H g10 =90.6mm, H g20 =76.9mm. According to the number of main reeds, elastic modulus, the structural parameters of each main spring and the design value of the free tangent arc height, the pre-clamping stress of each equal-thickness main spring after the three-stage gradient stiffness leaf spring is assembled and clamped Perform simulation calculations.

[0047] Using the same simulation calculation method and steps as in Embo...

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Abstract

The invention relates to a method for performing simulating calculation on pre-clamping stress of three-grade gradually-changed rigidity plate spring equal-thickness main springs, and belongs to the technical field of a suspension frame gradually-changed rigidity spring. The pre-clamping stress of each equal-thickness main spring after assembling and clamping of three-grade gradually-changed rigidity plate springs is subjected to simulating calculation according to the number of the main springs, the structural parameter of each main spring, the design value of free tangential arc height and elastic modulus. Model machine tests show that the method for performing simulating calculation on the pre-clamping stress of the three-grade gradually-changed rigidity plate spring equal-thickness main springs, which is provided by the invention, is correct and provides a reliable technological method for simulating calculation of the pre-clamping force of each equal-thickness main spring after assembling and clamping of the three-grade gradually-changed rigidity plate springs. By the method, the accurate and reliable simulating calculation value of the pre-clamping force of each equal-thickness main spring after assembling and clamping of the three-grade gradually-changed rigidity plate springs can be obtained, the design level of the product is increased, the reliability is improved, theservice life is prolonged and the vehicle driving safety is improved; meanwhile, the design and test expanses of the product are reduced and the development speed of the product is increased.

Description

technical field [0001] The invention relates to a simulation calculation method for the pre-clamping stress of a thick main spring such as a leaf spring with gradually changing stiffness of a vehicle suspension, especially a leaf spring with three levels of gradually changing stiffness. Background technique [0002] In order to meet the design requirements of vehicle ride comfort under different loads, three-stage gradient stiffness leaf springs can be used, that is, between the last leaf of the main spring and the first leaf of the first auxiliary spring, and between the last leaf of the first auxiliary spring and the first leaf of the second auxiliary spring. There are three-stage gradient gaps between the first secondary secondary reeds, and between the second secondary secondary reed end and the third secondary secondary reed first. Among them, the most widely used is the equal-thickness main spring type three-stage gradual change. Stiffness leaf spring, that is, the thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/066F16F2230/0082F16F2230/40F16F2238/022G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城赵雷雷毛少坊于曰伟汪晓杨铖兆李晓晗杨腾飞梁宇通
Owner SHANDONG UNIV OF TECH