High-fatigue-resistance composite material automobile plate spring and manufacturing method thereof

Abstract

The invention discloses a high-fatigue-resistance composite material automobile plate spring and a manufacturing method thereof. The high-fatigue-resistance composite material automobile plate springcomprises at least one layer of unidirectional fiber layer which is stacked and laid, and at least one layer of two-dimensional braided sleeve which sleeves the outer surface of the unidirectional fiber layer. The manufacturing method comprises the following steps: stacking and laying at least one layer of the unidirectional fiber layer; sleeving the at least one layer of the two-dimensional braided sleeve on at least one layer of the unidirectional fiber layer with the at least one layer of two-dimensional braided sleeve to prepare a fiber pre-molded body; putting the fiber pre-molded body into a molding mold, and adopting a molding technology for immersing, curing, de-molding and trimming to obtain the composite material automobile plate spring. According to the high-fatigue-resistance composite material automobile plate spring, the properties of continuous fibers, controllable angles and good mold adhering performance in the two-dimensional braided sleeve are utilized and the automobile plate spring with high fatigue resistance and excellent inter-laminar shearing resistance is prepared; the preparation technology is simple and the problems that a traditional pure unidirectionallaid fiber plate spring has no restriction in an annular direction and poor fatigue resistance and a three-dimensional pre-molded body braiding technology is complicated are effectively avoided.

Description

technical field [0001] The invention relates to a leaf spring preparation technology used in the automobile industry, in particular to an automobile leaf spring made of high fatigue-resistant composite material and a manufacturing method thereof. Background technique [0002] At present, most automobiles use steel leaf springs as buffer and shock absorbing structures. The steel plate structure is simple, low in cost, and easy to maintain. However, the steel leaf spring itself is very heavy, which increases the weight of the vehicle, thereby increasing the fuel consumption rate and having a certain impact on the handling stability of the vehicle. In addition, the automobile steel leaf spring is composed of multiple pieces of spring steel, and the inevitable friction between adjacent spring steels will shorten the life of the steel leaf spring; and the steel leaf spring will suddenly break and cause damage. security incident. With the continuous improvement of people's pursu...

AI Technical Summary

Problems solved by technology

[0005] At present, the composite material leaf spring has the problem of weak interlayer bonding strength under relatively high fatigue loading conditions. The existing solution is to use the winding method to combine the two-dimensional fabric stacks. This method has the disadvantages of cumbersome preform process and uneven product thickness. Even, the strength between layers cannot be achieved; or, the laminated single-layer structure is formed into a whole by longitudinal stitching between layers. The biggest defect of this method is that the process is cumbersome, the production time is long, the production efficiency is low, and it does not meet the requirements of industrialization.

Images