Method for manufacturing gasoline filter through laser welding

Abstract

The invention provides a method for manufacturing a gasoline filter through laser welding. Cracks and air holes at a laser welding joint of an aluminum shell can be effectively eliminated, the sealing performance and pressure resistance of the shell are improved, and no sealing part is adopted for the filter so as to save cost. The method comprises the steps that 1, an end cover and a shell are subjected to surface treatment, the end cover is an aluminum end cover integrated to an oil inlet pipe, and the shell is an aluminum shell integrated to an oil outlet pipe; the end cover and the shell are clamped, and the end cover is assembled to the top of the shell; 3, a laser lens is adjusted to enable the included angle between laser light and the vertical direction to be 5-10 degrees, the ring seam between the end cover and the shell is sealed and welded through laser light, and the end cover and the shell are welded together.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a method for manufacturing gasoline filters by laser welding. Background technique [0002] The fuel filter is an important part to protect the engine system. Its main function is to remove solid impurities such as iron oxide and dust in the fuel, prevent the fuel system from clogging and reduce mechanical wear, so as to ensure the stable operation of the engine. The fuel filter is composed of an aluminum alloy shell and a filter element, and the sealing and pressure resistance of the shell are the key to the filter's qualification. [0003] At present, there are gasoline filters of various structures on the market, most of which are connected with the shell and the end cap by a screw or a clip. figure 1 is the structural diagram of the existing gasoline filter, such as figure 1 As shown, the housing 10 and the end cover 11 are clamped and fixed. In order to improve th...

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Problems solved by technology

[0005] The heat-affected zone of traditional arc welding is relatively large, which is likely to cause the collapse of the connection between the end cover and the shell; the welding deformation is relatively large, which will affect the subsequent installation; the welding speed is slow and the production efficiency is not high enough

The laser welding method solves the problems of large heat-affected zone, large deformation and low production efficiency. However, for the end cover and shell of pure aluminum, laser welding is easy to reflect laser light, and the general laser welding process is easy to produce a variety of welding defects. For example, the pores of the weld seam exceed the standard, slag inclusions, and the mechanical properties of the joints are not up to standard, etc. Therefore, it is of great significance to study a suitable laser welding process to achieve the airtight packaging of the fuel filter housing.

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