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Hollow grid flow adjusting cover machining process method

A processing technology and fairing technology, which is applied in the field of hollow grid fairing processing technology to achieve high processing efficiency, good quality stability of parts, high-quality, high-efficiency and low-cost processing

Active Publication Date: 2021-11-02
BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a hollow grid fairing processing method to overcome the defects of the existing processing methods

Method used

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  • Hollow grid flow adjusting cover machining process method
  • Hollow grid flow adjusting cover machining process method
  • Hollow grid flow adjusting cover machining process method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The part blank of the present invention selects deformed aluminum alloy, as 2A12, technological process: Milling thickness and shape; gun drilling deep holes; sheet metal forming; Electrically machined ring grid.

[0037] In the selection of blank materials, the selected materials are deformed aluminum alloy sheet 2A12, etc., which have high strength and elongation.

[0038] The first step, milling thickness and shape: In this process, a face milling cutter is used on a milling machine to process the maximum envelope thickness of the part in the thickness direction, and the tolerance is 1 / 5 to 1 of the final symmetry accuracy of the surface / 3, using an end mill to process the peripheral dimensions to the fan-shaped contour dimensions of the part.

[0039] The second step, gun drilling to process deep holes: This process uses a gun drill commonly used in gun barrel processing as a deep hole processing tool. The maximum processing depth-to-diameter ratio can exce...

Embodiment 2

[0043] A fairing has a semi-conical surface structure, and there are 15 rectangular grids on the central plane with symmetrical thickness to form a rectangular hollow grid structure. 24mm, 30mm from the big end, 50mm spacing, 5mm thick vertical ribs in the middle of the fairing cone and between grooves.

[0044] process flow Milling thickness and shape; gun drilling deep holes; sheet metal forming; Electrically machined ring grid.

[0045] The rough material is made of deformed aluminum alloy sheet 2A12, with a size of 850mm×800mm×30mm.

[0046] The first step, milling thickness and shape: use a Ø32 face milling cutter on a common milling machine to mill the thickness to mm, using a Ø10 end mill to make the peripheral shape into a fan-shaped profile, the length is 800mm, the radius of the arc at the small end is 1950mm, the radius of the arc at the large end is 2753mm, and the angle is 17°.

[0047] The second step, gun drilling deep holes: on the gun drilling machi...

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Abstract

The invention discloses a hollow grid flow adjusting cover machining process method. The hollow grid flow adjusting cover machining process method comprises the following steps that 1, a wrought aluminum alloy plate is selected as a flow adjusting cover plate, firstly, the thickness and appearance of the flow adjusting cover plate are milled, specifically, a face milling cutter is adopted on a milling machine to machine the flow adjusting cover plate in the thickness direction to the maximum enveloping thickness size of a part, the peripheral boundary dimension is machined to the overall dimension of a part of the unfolded sector of the flow adjusting cover through an end mill, and the flow adjusting cover plate at the moment is named as a sector-shaped flow adjusting cover plate. According to the hollow grid flow adjusting cover machining process method, the body strength of a wrought aluminum alloy can be completely reserved to meet the requirements of design for strength and ductility, meanwhile, deformation caused by casting internal stress, welding stress, milling stress and cutting heat can be effectively reduced, the machining efficiency is high, deformation is small, cost is low, the quality stability of parts is good, high-quality, high-efficiency and low-cost machining of hollow grid flow adjusting cover parts can be achieved, and the method is suitable for batch machining.

Description

technical field [0001] The invention relates to a processing method for a hollow grid fairing, and relates to a processing method for a fairing, in particular to a processing method for a hollow grid fairing. Background technique [0002] The traditional processing technology of hollow grid fairing is generally to choose cast aluminum alloy, and the process flow is generally as follows: Skeleton casting; Skin sheet metal forming; Skeleton machining grid; Diffusion welding is used between the skin and the skeleton grid; The skin and frame are connected by argon arc welding; Finish milling to remove deformation allowance. [0003] The disadvantages of this process flow are: the types of materials available for casting are limited, the strength and elongation are low, the impact toughness is insufficient, the complex structure is prone to casting defects, and the center of gravity of the product is large; the high temperature of welding reduces the strength performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 禄亚锋魏建中
Owner BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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