A low-deformation processing method for a large aluminum alloy thin-walled grid cylinder section

Abstract

The invention belongs to the machine manufacturing and machining technology, and particularly discloses a low-deformation machining method of a large aluminum alloy thin-wall mesh barrel section. Themethod comprises the steps of barrel section cleaning, clamping alignment, deformation laser measurement, rough-milling mesh sinking and finish-milling mesh sinking. The low-deformation machining method of the large aluminum alloy thin-wall mesh barrel section is achieved, deformation in the machining process is reduced, and the product quality is improved. A machining path of achieving machiningfrom the middle of the barrel section to the upper end and the lower end is adopted, on one hand, part machining stress can be reduced, on the other hand, part internal stress can be redistributed more averagely, and machining deformation can be effectively reduced. Compensation methods are adopted for achieving precise machining of the large aluminum alloy thin-wall mesh barrel section, part theoretical appearance deviation is eliminated through the laser compensation method, and part mesh thickness precise machining is achieved through the ultrasonic thickness compensation method.

Description

technical field [0001] The invention belongs to mechanical manufacturing and processing technology, and in particular relates to a processing method of an aluminum alloy tube segment. Background technique [0002] The large-scale aluminum alloy thin-wall grid tube section is an important component product of the transport storage box. It has the characteristics of large size, thin wall, weak rigidity, and easy deformation during processing. 2.5m, but the wall thickness of the part is in the range of 2mm to 5mm, and the diameter and contour size of the part is relatively large compared to the cross-sectional size, resulting in weak rigidity of the part and difficult to control the deformation during processing. Such as figure 1 Shown is a large-scale aluminum alloy thin-walled grid tube section, the inner wall of the tube section is distributed with triangular grids, and there are rib structures between the triangular grids. [0003] The storage tank is an important part of...

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Problems solved by technology

However, this process method has the following problems: (1) It is difficult to control the chemical corrosion rate, and it is easy to cause over-corrosion or uneven corrosion, which will either cause pitting pits or thin corrosion parts on the wall plate, or cause uneven corrosion of the wall plate. In place will cause full over-correction, low machining accuracy, and difficult to control the remaining wall thickness tolerance

(2) The traditional chemical milling process must require fillet transition, and the transition fillet R is large, resulting in excessive waste weight, and the wall thickness is delivered in excess of positive tolerance, which greatly increases the overall weight of the storage tank and seriously affects Siding weight

It is not conducive to the weight loss of the arrow body

(3) The chemical milling process will cause a large amount of waste liquid discharge, and the use of a large amount of organic glue will bring about organic waste that is harmful to the environment, serious waste of energy, and great pressure on environmental pollution

However, the large-scale aluminum alloy thin-wall grid tube section has the characteristics of large size, thin wall, and weak rigidity, and there are technical difficulties in controlling processing deformation. The key to reducing processing deformation is to adopt a reasonable process method

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