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Cold-working molding method of thin-diameter thin-wall aluminum alloy tubular product

A technology of thin-walled pipes and aluminum alloy pipes, which is applied in the field of cold forming of aluminum alloy thin-diameter thin-walled pipes, to achieve the effects of simple processing steps, good surface quality, and small grain size

Active Publication Date: 2010-03-10
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is necessary to develop a processing and preparation method for aluminum alloy thin-diameter and thin-walled pipes and form a patented technology, and there are no relevant reports at home and abroad.

Method used

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  • Cold-working molding method of thin-diameter thin-wall aluminum alloy tubular product
  • Cold-working molding method of thin-diameter thin-wall aluminum alloy tubular product

Examples

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Embodiment 1

[0036] In this embodiment, the aluminum alloy 3A21 pipe material with a structural size of Φ7.5×0.75mm, that is, the aluminum alloy tube blank 1, needs to be cold-processed to Φ6.0×0.60mm. The specific processing process is as follows: first, the aluminum alloy 3A21 The pipe is subjected to recrystallization annealing and tempering treatment, and the heat treatment temperature is 450°C±50°C, the time is 60±30min, the cooling method is furnace cooling, and the average grain size after quenching and tempering is about 20μm. After conditioning treatment, the MoS 2 The emulsion lubricant is evenly coated on the outer surface of the aluminum alloy 3A21 pipe, and it is air-dried at room temperature. At the same time, a Φ4.8mm spring steel long core rod is inserted inside the aluminum alloy 3A21 pipe to be processed, and the deformation of each pass is set. ε is in the range of 8 to 25%. Afterwards, the first die uses a drawing die with a hole diameter of Φ7.0mm, and the aluminum al...

Embodiment 2

[0039] In this embodiment, the aluminum alloy 5052 narrow-diameter thin-walled pipe with a structural size of Φ5×0.3mm, that is, the aluminum alloy tube blank 1, needs to be cold-processed to Φ4×0.3mm. The specific processing process is as follows: The furnace performs recrystallization annealing quenching and tempering treatment on the aluminum alloy 5052 thin-diameter thin-walled pipe, and the heat treatment temperature is 500°C±50°C, the time is 120min±60min, and the cooling method is air cooling. After recrystallization annealing and tempering treatment, the MoS 2 The emulsion lubricant is evenly coated on the outer surface of the aluminum alloy 5052 thin-diameter and thin-walled pipe, and dried at a temperature of 50°C, and the deformation amount ε per mold pass is set at 8-20%. Afterwards, the first die uses a drawing die with a hole diameter of Φ4.6mm, and the aluminum alloy 5052 thin-diameter thin-walled pipe to be processed passes through the hole of a YG8 hard alloy ...

Embodiment 3

[0042] In this embodiment, a plurality of aluminum alloy 2A01 narrow-diameter thin-walled pipes with a structural size of Φ3×0.2mm, that is, the aluminum alloy tube blank 1, is cold-worked to Φ2×0.2mm. Since the outer diameter of the aluminum alloy tube blank 1 needs to be drawn The drawing process is processed to less than 3mm, so the method of inserting multiple aluminum alloy tube blanks 1 to be drawn into an aluminum alloy cladding tube 2 of the same material at the same time for overall drawing is adopted, and the multiple to be drawn The drawn aluminum alloy tube blank 1 fills the entire interior of the aluminum alloy cladding tube 2 and is combined into a whole, and then the aluminum alloy cladding tube 2 is drawn by using a drawing device. At the same time, the plurality of aluminum alloy tube blanks 1 to be drawn are symmetrically arranged with the central axis of the aluminum alloy cladding tube 2 as the center of symmetry. In this embodiment, the inner diameter of t...

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Abstract

The invention discloses a cold-processing molding method of a thin-diameter thin-wall aluminum alloy tubular product. The method comprises the following steps: (1) recrystallization annealing quenching tempering: adopting a vacuum furnace or a resistance furnace under protective atmosphere to carry out recrystallization annealing quenching tempering on an aluminum alloy tube blank; (2) surface lubrication: uniformly coating a layer of MoS2 emulsion lubricant or graphite emulsion lubricant on the outer surface of the aluminum alloy tube blank after the recrystallization annealing quenching tempering; (3) drawing and molding: adopting drawing equipment to carry out multi-die drawing treatment on the aluminum alloy tube blank after surface lubrication until obtaining an thin-diameter thin-wall aluminum alloy tubular product to be molded; and (4) subsequent treatment: carrying out surface cleaning, straightening and scaling treatment on the thin-diameter thin-wall aluminum alloy tubular product molded by drawing and obtaining a finished thin-diameter thin-wall aluminum alloy tubular product. The invention has simple processing steps, convenient implementation, low processing cost andgood processing effect and can effectively solve the problem for processing the thin-diameter thin-wall aluminum alloy tubular product.

Description

technical field [0001] The invention relates to a processing method of an alloy pipe, in particular to a cold forming method of an aluminum alloy thin-diameter and thin-walled pipe. Background technique [0002] Aluminum alloy has the characteristics of high specific strength, high specific stiffness, good thermal conductivity and easy recycling, so aluminum alloy materials are widely used in aviation, aerospace and transportation, communication equipment, electronic products and other fields, and are used in the above fields Aluminum alloys include 5A02, 5A03, 5B02, 5B05, 5A06, 5A12, 5A43, 3A21, 5083, 2A01, 6A02, etc., which contain Fe, Zn, Mn, Zr, Cu, Si, Mg, Ni, Ti and other elements. ≥180MPa, elongation ≥8%, and the outer diameter of commonly used aluminum alloy pipes is Φ12~Φ90mm, and the wall thickness is 2.0~6.5mm. [0003] Due to the poor plasticity and toughness of "soft" metals such as aluminum alloys at room temperature, the main products available on the market ...

Claims

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Application Information

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IPC IPC(8): B21C1/22B21C9/00C22F1/04
Inventor 皇甫强于振涛张亚峰袁思波刘春潮刘少辉
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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