High-precision aluminum alloy rectangular tube forming method

A technology of aluminum alloy and rectangular tube, applied in the direction of wire drawing die, etc., can solve the problems of tube billet breaking and corner transverse cracks, etc., and achieve the effect of eliminating transverse cracks, dense structure and good surface quality.
CN102172665BInactive Publication Date: 2013-04-03CHONGQING UNIV
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2013-04-03
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a high-precision aluminum alloy rectangular tube forming method which comprises the following steps: a) heating the prepared No.6061 aluminum alloy ingot over uniform fire to 415+ / -5 DEG C, and keeping for 1-2 hours; b) performing hot extrusion on an extrusion shunting mould with a preheating temperature of 400 DEG C to obtain an initial tube blank; c) performing annealingtreatment in salt bath; d) performing cold rolling on the tube blank obtained in the step c) to obtain a round tube; e) soaking the round tube obtained in the step d) in a 38# cylinder oil for 24 hours; f) performing non-mandrel drawing on the tube blank obtained in the step e) to obtain an approximately rectangular tube; g) performing mandrel drawing on the approximately rectangular tube obtained in the step f) through a rectangular correction mould to obtain a rectangular tube; and h) performing mandrel drawing of the rectangular tube obtained in the step g) to obtain the finished tube. Through the invention, the size precision and surface quality of the finished tube are improved, the problems that the tube blank is drawn apart in the drawing process and obvious transverse cracks appear at the corner are solved, and the operational performance and service life of the product are remarkably improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of metal material processing, and in particular relates to a forming method of a high-precision aluminum alloy rectangular tube. Background technique

[0002] As an important component of radio microwave communication and navigation equipment, the high-precision aluminum alloy rectangular tube is widely used in important scientific and technological fields such as aviation, aerospace, radar, telemetry and long-distance communication. Due to the particularity of the work and use environment, stricter requirements are imposed on the dimensional accuracy and inner surface quality of this type of rectangular tube. At present, in actual production, the preparation of this type of pipe mainly adopts the drawing forming scheme of initial circular tube billet-transitional ellipse-finished rectangle. However, due to the unreasonable deformation of the tube blank material, the consistency and uniformity of the flow o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More