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Simulation calculating method for pre-clamping stress of straight-root type equal-thickness overlaid plate springs

A simulation calculation and flat technology, applied in the field of vehicle suspension leaf springs, can solve problems that cannot meet the requirements of suspension leaf springs and have not been given, so as to reduce design and test costs, improve design levels, and speed up product development. Effect

Inactive Publication Date: 2018-09-28
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 leaf spring after the saddle bolt assembly and clamping, the accurate and reliable pre-clamping of each leaf spring of the flat root flat and equal thickness superimposed leaf spring has not been given before. The simulation calculation method of the tight stress cannot meet the requirements of the rapid development of the vehicle and the modern CAD design of the suspension leaf spring

Method used

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  • Simulation calculating method for pre-clamping stress of straight-root type equal-thickness overlaid plate springs
  • Simulation calculating method for pre-clamping stress of straight-root type equal-thickness overlaid plate springs
  • Simulation calculating method for pre-clamping stress of straight-root type equal-thickness overlaid plate springs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the width b=60mm of a straight type equal-thickness superimposed leaf spring of a certain root, the modulus of elasticity E=200GPa; the number of leaf springs n=5, the thickness of each leaf spring is h=9mm, and the root is straight half of the length L 0 =50mm; Half of the effective length of each leaf spring is L 1T =575mm, L 2T =525mm, L 3T =475mm, L 4T =425mm,L 5t =375mm; the design value H of the free tangent arc height of each leaf spring g10 =94.5mm, H g20 =79.1mm,H g30 =64.7mm,H g40 =51.5mm, H g50 = 39.5 mm. According to the number of leaf springs, the structural parameters of each leaf spring, the design value of the free tangent arc height, and the elastic modulus, the pre-clamping of each leaf spring after the pre-clamping of the root flat and equal-thickness superimposed leaf spring assembly The stress is simulated and calculated.

[0026] The simulation calculation method of the root flat type equal thickness superimposed leaf sprin...

Embodiment 2

[0052] Embodiment 2: the width b=60mm of a certain straight type equal-thickness stacked leaf spring at the root, the modulus of elasticity E=200GPa; the number of leaf springs n=4, the thickness of each leaf spring is h=10mm, and the root is straight half of the length L 0 =50mm; Half of the effective length of each leaf spring is L 1T =575mm,L 2T =525mm, L 3T =475mm, L 4t =425mm. The design value H of the free tangent arc height of each leaf spring g10 =94.2mm,H g20 =79.7mm,H g30 =65.9mm,H g40 = 52.9 mm. According to the number of leaf springs, the structural parameters of the leaf spring, the design value of the free tangent arc height, and the elastic modulus, the pre-clamping stress of each leaf spring after the pre-clamping of multiple leaf springs of the same thickness is simulated calculate.

[0053] Using the same simulation calculation method and steps as in Embodiment 1, the pre-clamping stress of each leaf spring of the root straight type equal-thickness ...

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Abstract

The invention relates to a simulation calculating method for pre-clamping stress of straight-root type equal-thickness overlaid plate springs, and belongs to the technical field of suspension steel plate springs. Simulation calculation can be carried out on pre-clamping stress of all plate springs of assembled and clamped straight-root type equal-thickness overlaid plate springs according to the number of plate springs, structure parameters of all plate springs, design values of free tangent arc heights and elastic modulus. It can be known through a prototype test that the simulation calculating method for pre-clamping stress of the straight-root type equal-thickness overlaid plate springs is correct, accurate and reliable simulation calculating values of pre-clamping stress of all equal-thickness plate springs can be obtained, and the reliable technical method is provided for simulation calculation of pre-clamping stress of the straight-root type equal-thickness overlaid plate springs. By means of the method, it can be ensured that pre-clamping stress of all plate springs meets the design requirement, the design level and reliability of products are improved, the service life of the products is prolonged, and vehicle running safety is improved; and meanwhile, design and test costs of the products are lowered, and the product development speed is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a simulation calculation method for the pre-clamping stress of a straight root equal-thickness superimposed leaf spring. Background technique [0002] Multi-leaf superimposed leaf springs are widely used parts in vehicle suspension springs. Usually, in order to ensure the clamping stiffness characteristics of the leaf springs, the middle assembled clamping section of each leaf spring is processed into a straight section, that is, the root is straight Type equal-thickness leaf springs, and through the different free tangent arc heights of each leaf spring, ensure that the assembly and clamping tangent arc height of the first leaf spring after the saddle bolt is assembled and clamped meets the design requirements; at the same time, the first leaf spring Or the first few leaf springs produce a certain pre-clamping compressive stress, thereby improving the reliability and service l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/06F16F2230/0082F16F2230/40F16F2238/02G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城杨腾飞赵雷雷汪晓张云山朱召辉梁宇通李晓晗石莹
Owner SHANDONG UNIV OF TECH
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