Leaf spring and manufacturing technology thereof

Abstract

The invention relates to a leaf spring and a manufacturing technology thereof. The leaf spring comprises a leaf middle section, a transition section, a variable-section section and a winding lug installing section, and all the sections are the same in width. The material of the leaf spring is an FRP composite material. The manufacturing technology comprises the fiber cloth weaving procedure, the fiber cloth laminating procedure, the laminated layer spot welding procedure, the pre-forming procedure, the cutting procedure, the HP-RTM procedure, the unloading and shaping procedure and the post-machining procedure. The technical scheme solves the problems of design and process of leaf spring leaves in the prior art, the leaf spring leaf performance is improved, the volume production beat is fast, and the market value of the leaf spring is huge; one leaf spring can be independently used, two leaf springs can be combined to form a main and auxiliary spring structure, different loads are achieved, and all steel plate spring structures can be replaced by changing structures of winding lugs and other accessories; complete fracture at a time is avoided, the active failure mode is achieved, and the vehicle running safety is sufficiently guaranteed; the weight of a leaf spring suspension is reduced, the dynamic stiffness is very small, the vehicle running smoothness is improved, and fuel affinity is improved as well; and the service life is 5 or more times of the steel plate springs, and the cost of using the leaf spring by users is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of vehicle springs, in particular to a leaf spring and a manufacturing process thereof. Background technique [0002] Leaf springs are widely used in automobiles, and there are two types of layouts: vertical or horizontal. The latter must be provided with an additional guiding force transmission device to transmit the longitudinal force, which makes the structure complex and the quality increased, so it is only used in a small number of light and miniature vehicles. The former's longitudinal form can transmit various forces and moments, has a guiding function, and has a simple structure, so it is widely used in automobiles. [0003] figure 1 It is the structural form of various forms of vertical leaf spring assemblies in the prior art. They are all made of a plurality of leaf springs made of steel. These leaf springs are all of equal width, and the thickness of the multi-leaf springs is equal. The thickne...

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Problems solved by technology

[0009] The purpose of this invention is to provide a kind of leaf spring and its manufacturing process, to solve the design problems such as the large local stress of the FRP composite material leaf spring in the prior art, the rigidity is difficult to determine; To solve the FRP composite material leaf spring manufacturing process of the prior art Complicated, difficult to mass-produce, easy to strip and peel off; to solve the problems of poor fuel efficiency, low life and low reliability of the leaf springs in the prior art

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