Manufacturing method of novel circular aluminium alloy tube for automobile gas spring

Abstract

The invention discloses a manufacturing method of a novel circular aluminium alloy tube for an automobile gas spring. Raw materials comprise alloy elements in percentage by mass as follows: 0.48%-0.52% of Si, 0.16%-0.20% of Fe, less than or equal to 0.05% of Cu, less than or equal to 0.05% of Mn, 0.51%-0.55% of Mg, less than or equal to 0.05% of Cr, less than or equal to 0.05% of Zn, 0.15%-0.25% of Ti, 0.004%-0.01% of Pb, 0.001%-0.002% of Ca+Na, less than or equal to 0.05% of other individual elements, less than or equal to 0.15% of the total amount of other elements and the balance of Al; andan aluminium rod comprising the components is prepared through procedures including hot extrusion, drawing, finishing, finished product sawing, cleaning, aging treatment, machining and the like. Theproduct prepared with the method has the advantages of good plasticity and mechanical property, high machining precision and high surface quality, has the tensile strength ranging from 280 Mpa to 320Mpa, has the yield strength ranging from 220 Mpa to 260 Mpa and has the elongation ranging from 12% to 15%.

Description

technical field [0001] The invention relates to the design and manufacturing process of the alloy composition of an aluminum alloy profile, in particular to an aluminum alloy round tube, which replaces the steel material and is used as a gas spring component—a piston rod, to play a telescopic and fixed role. Background technique [0002] Gas spring is an industrial accessory that can perform functions such as support, buffer, brake, height adjustment and angle adjustment. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), in-cylinder control element and out-of-cylinder control element (referring to controllable gas spring) and joints, etc. The principle is to fill the closed pressure cylinder with an inert gas or an oil-gas mixture, so that the pressure in the cavity is several times or dozens of times higher than the atmospheric pressure, and the pressure difference generated by the cross-s...

AI Technical Summary

Problems solved by technology

[0005] At present, the plasticity and mechanical properties of aluminum alloy materials appearing on the market are poor, and the processing accuracy is low, and the surface quality is not good, so it is difficult to meet the high-quality requirements of aluminum alloys for automotive gas springs.

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