Passenger car aluminum alloy engine cover riveting and bonding composite connection method

Abstract

The invention provides a passenger car aluminum alloy engine cover riveting and bonding composite connection method. The method comprises the steps that an engine cover reinforcing plate is pre-fixedto an engine inner plate through a vibration reduction glue bonding manner, reinforcing plates are completely fixed to the engine cover inner plate through a self-piercing riveting manner; a protruding edge of a lightening hole of the engine cover inner plate, a lock ring reinforcing plate and an engine outer plate reinforcing plate are coated with vibration reduction glue, and an engine cover outer plate of the engine cover falls down to finish bonding; the edge of the engine cover inner plate is coated with folding glue, the edge of the engine cover outer plate is subjected to side wrappingtowards the engine cover inner plate, the side wrapping procedure of the engine cover can be finished, and an engine cover assembly can be obtained; the engine cover assembly is baked, vibration reduction glue and folding glue are cured, and connection of the engine cover can be achieved. The self-piercing riveting and bonding composite process is used for replacing the welding process, connectionof the aluminum alloy engine cover is achieved, and whole rigidity, whole strength and size precision of connection of the aluminum alloy engine cover can be better ensured.

Description

technical field [0001] The invention belongs to the technical field of automobile covers, and relates to a riveting and bonding compound connection method for an aluminum alloy engine cover of a passenger car. Background technique [0002] The engine cover is an important assembly in the car cover. In addition to the appearance requirements and rigidity requirements, it is also required to be light in weight, strong in collision energy absorption, and good in pedestrian protection. The engine hood of the existing structure not only has a large mass of the inner panel of the hood, but also has an excessively large design rigidity, which leads to an excessively high injury value when a pedestrian collides, which is not conducive to pedestrian protection. [0003] The density of the aluminum alloy plate is about 2700kg / m 3 , which is only 35% of the density of the steel plate, and the specific strength of the aluminum alloy plate is higher. Therefore, the engine cover made of ...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned technical problems, the present invention aims to propose a riveting-adhesive composite connection method for an aluminum alloy engine cover of a passenger car. The composite process of self-piercing riveting and bonding is used to realize the connection of the aluminum alloy engine cover, which avoids the need for welding due to welding. The connection method leads to problems such as the decrease of the connection strength caused by the welding of the aluminum alloy sheet, thermal deformation, etc., and the dimensional deformation of the inner plate of the hood, so as to ensure that the aluminum alloy engine hood can achieve a large weight reduction while meeting the requirements for appearance and rigidity. Collision energy absorption effect, making it more conducive to pedestrian protection

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