Outer duct casing based on chemical milling process

Abstract

The invention provides an outer duct casing based on a chemical milling process. The outer duct casing comprises a front casing and a rear casing, latticed reinforcing ribs are arranged on the front casing and the rear casing, and the latticed units of the reinforcing ribs are triangular or quadrilateral; the front casing is of a cone shell structure, and the rear casing is of a cylinder structure. The drawing problem of the reinforcing ribs in a design stage can be effectively solved, and based on the finished product structure, it is ensured that the reinforcing rib drawing on a conical surface can be completed in a projection mode, so that the design difficulty of casing parts is greatly reduced.

Description

technical field [0001] The invention relates to an external channel casing based on chemical milling technology. Background technique [0002] The chemical milling process is to expose the processed parts of metal materials such as aluminum alloys, titanium alloys, and high-temperature alloys to chemical media containing acid or alkali and corrosion inhibitors and other additives for corrosion. A processing method in which the corrosive agent such as alkali produces a chemical reaction and dissolves to achieve the expected structural shape and size. It can be used to manufacture titanium alloys with complex contours and shapes that cannot be completed by traditional techniques or that are expensive to manufacture. It is a special processing technology with no tool loss, no chip stress and deformation, high processing efficiency and low processing cost. Since chemical milling does not produce cutting stress, it can process parts with thin walls, complex shapes, easy deforma...

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Problems solved by technology

[0004] The patent for invention with the application number CN201410802737.5 discloses a method of increasing the rigidity of the casing by means of circular and spiral grid reinforcements, and calculates the reinforcement width, reinforcement height, and reinforcement angle for the cylindrical section. The length, distance, and total width of the base are introduced. The patent believes that the method is suitable for the conical section, and that the rib needs to be an isosceles triangle. The ribs are drawn on the surface, and the method of determining the integer coefficient of the rib unit and the method of drawing the grid of the ribs are not introduced, and there is no method to guide the design of the entire casing part in detail

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