Design method for the cutting length of the first leaf of the secondary spring of each stage of high-strength two-stage gradient stiffness leaf spring

Abstract

The invention relates to a design method for the blanking length of the first pieces of secondary springs at each level of a high-strength two-stage gradually changing stiffness leaf spring, and belongs to the technical field of vehicle suspension leaf springs. According to the structural parameters, modulus of elasticity, contact load, and the design value of the initial tangent arc height of the main spring and the auxiliary spring of each sheet, the present invention can calculate and calculate the initial tangent arc height of the first sheet of the auxiliary spring at all levels. Micro-element arc height superposition calculation is used to design the blanking length of the first leaf of the high-strength two-stage gradient stiffness leaf spring. According to the test results of the blanking process of the prototype machine, it can be seen that the design method of the blanking length of the first pieces of the auxiliary springs of each level of the high-strength two-level gradient stiffness leaf spring provided by the present invention is correct, and accurate and reliable auxiliary springs of all levels can be obtained. The design value of the blanking length of the sheet lays a reliable technical foundation for the modern CAD design of high-strength two-stage gradient stiffness leaf springs; at the same time, using this method can save materials, reduce design and test costs, and speed up product development.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the blanking length of the first pieces of secondary springs at each level of a high-strength two-stage gradually changing stiffness leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength two-stage gradient stiffness leaf springs can be used for vehicle suspension, so as to further meet the design requirements of vehicle ride comfort and suspension gradient bias frequency under different loads. Among them, The length of the auxiliary springs at all levels has an important influence on the stiffness of the leaf spring, and the cutting length of the first piece of the auxiliary spring at each level determines the design of the cutting length of the other auxiliary springs. Whether the design of the cutting length of the first piece of the auxiliary spring at each level is accurate Reliable, it plays ...

AI Technical Summary

Problems solved by technology

However, due to the gradual contact between the main spring and the primary and secondary secondary springs, the contact length and the gradual stiffness change with the load, the calculation of the deflection of the main spring and secondary secondary springs is not only related to the main spring and primary secondary springs. The structural parameters of the secondary spring and the secondary secondary spring are related to each contact load. Therefore, the design of the initial tangent arc height and the calculation of the initial surface shape of the secondary secondary spring at all levels are very complicated. The design method of the blanking length of the first leaf of the secondary spring of each stage of the high-strength two-stage gradual stiffness leaf spring is given

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