Simulating calculation algorithm for root curvilinear type equal thickness stacked leaf spring pre-clamping stress

A simulation calculation and curve technology, applied in the field of vehicle suspension leaf springs, can solve problems such as the inability to meet the suspension leaf springs, and achieve the effect of reducing design and test costs, improving design level, and speeding up development speed.

Inactive Publication Date: 2018-07-06
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 information obtained, due to the pre-clamping stress of each leaf spring and the structure of each leaf spring, the relationship between the free tangent arc height, the pre-clamping tangent arc height and the pre-clamping radius of curvature of the first leaf spring Due to the constraints of calculation, a reliable simulation calculation method for the pre-clamping stress of the superimposed leaf spring with root curve and equal thickness has not been given before at home and abroad, which cannot meet the requirements of the rapid development of vehicles and the modern CAD design of suspension leaf springs.

Method used

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  • Simulating calculation algorithm for root curvilinear type equal thickness stacked leaf spring pre-clamping stress
  • Simulating calculation algorithm for root curvilinear type equal thickness stacked leaf spring pre-clamping stress
  • Simulating calculation algorithm for root curvilinear type equal thickness stacked leaf spring pre-clamping stress

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment one: the width b=60mm of a certain root curved equal-thickness stacked leaf spring, modulus of elasticity E=200GPa; leaf spring number n=5, the thickness h=9mm of each leaf spring, half of each leaf spring Action length L 1T =575mm,L 2T =525mm,L 3T =475mm, L 4T =425mm, L 5T =375mm; the design value of the free tangent arc height of each leaf spring is H g10 =103.4mm, H g20 =90.1mm, H g30 =77.0mm, H g40 =64.3mm,H g50 = 52.0 mm. The arc height of the first leaf spring pre-clamping tangent after the center piercing bolt is pre-clamped is H gF1 , the pre-clamping stress of each leaf spring is σ i . 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, each leaf spring after the curved equal-thickness superimposed leaf spring at the root is pre-clamped by the central mounting bolt The pre-clamping stress is simulated and calculated.

[0026] The...

Embodiment 2

[0052] Embodiment two: the width b=60mm of a certain root curved equal-thickness stacked leaf spring, modulus of elasticity E=200GPa; leaf spring number n=4, the thickness of each leaf spring is h=10mm; the thickness of each leaf spring half action length 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 =103.3mm, H g20 =89.3mm,H g30 =75.7mm,H g40 = 62.7 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, each leaf spring after the curved equal-thickness superimposed leaf spring at the root is pre-clamped by the central mounting bolt The pre-clamping stress is simulated and calculated.

[0053] Using the same design method and steps as in Embodiment 1, the pre-clamping stress of each leaf spring of the root curved equal-thickness superimposed leaf spring is simulated and calculated, ...

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Abstract

The invention relates to a simulating calculation algorithm for root curvilinear type equal thickness stacked leaf spring pre-clamping stress, and belongs to the technical field of suspension steel plate springs. On the basis of the number of spring leaves, structural parameters of each spring leaf, a design value of the free tangent arc height and elasticity modulus, simulating calculation is performed on pre-clamping stress of each spring leaf of a root curvilinear type equal thickness stacked leaf spring obtained after a central penetrating bolt is pre-clamped. A development test shows thatthe simulating calculation algorithm for the root curvilinear type equal thickness stacked leaf spring pre-clamping stress is accurate, and the reliable technical method is provided for simulating calculation for pre-clamping stress of each spring leaf of the root curvilinear type equal thickness stacked leaf spring. By means of the method, it is ensured that the pre-clamping stress of each spring leaf meets the design requirement, the design level and reliability of the product are improved, the service life is prolonged, and the vehicle driving safety can be improved; meanwhile, the productdesign and testing cost is 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 root curved equal-thickness superimposed leaf spring. Background technique [0002] Multi-sheet superimposed leaf springs are widely used parts in vehicle suspension springs, among which, the most widely used is the straight root equal-thickness superimposed leaf spring. Usually, in order to improve the production process and improve the production efficiency of the leaf spring, each leaf spring is subjected to a curved surface forming process, that is, the root curve type equal-thickness leaf spring. Through the different free tangent arc heights of each leaf spring, ensure the pre-clamping tangent arc height of the first leaf spring after the pre-clamping of the center mounting bolt, and the assembly of the first leaf spring after the saddle bolt assembly and clamping The clamping tangent arc height and clampin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 周长城于曰伟赵雷雷梁勋乾陈海真许祥利李晓晗梁宇通毛少坊
Owner SHANDONG UNIV OF TECH
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