Method for welding minor-diameter nozzle and aluminum alloy thin-walled structure

A thin-walled, small-diameter tube technology, used in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of difficult to meet requirements, large heat-affected zone, low energy density, etc. Accurate parameter control, low line energy and high energy density

Active Publication Date: 2012-08-08
CHENGDU SIWI HIGH TECH IND GARDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technology, the small-diameter nozzle and the aluminum alloy thin-walled structure need repeated positioning, shape correction and detection, and the operation is cumbersome and not easy to meet the requirements. At the same time, the thin-walled structure and the small-diameter small-diameter nozzle are chemically active. Aluminum alloy with high strength, large linear expansion coefficient, and good thermal conductivity. During TIG welding, due to the characteristics of low energy density, non-concentrated heat source, and large heat-affected zone, the adjacent molten pools in the girth weld area interact with each other. Under the combined effect of large restraints, welding deformation and defects are very prominent, and it is difficult to meet the requirements of product design

Method used

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  • Method for welding minor-diameter nozzle and aluminum alloy thin-walled structure
  • Method for welding minor-diameter nozzle and aluminum alloy thin-walled structure
  • Method for welding minor-diameter nozzle and aluminum alloy thin-walled structure

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Embodiment 1

[0034] Example 1 as figure 2 and image 3 As mentioned above, the welding method of the small-diameter nozzle and the aluminum alloy thin-walled structure of the present invention is characterized in that: it adopts the following steps to realize:

[0035] 1) Process the aluminum alloy thin-walled structure 3, the aluminum alloy thin-walled structure 3 is spherical crown, the ring 1 is installed on the edge of the spherical crown, and the spherical crown of the aluminum alloy thin-walled structure 3 is processed to assemble a small diameter Mounting hole for Nozzle 2.

[0036] First install the ring 1 on the edge of the aluminum alloy thin-walled structure 3, so that the entire aluminum alloy thin-walled structure 3 forms a ring shape, so that the aluminum alloy thin-walled structure 3 has a certain rigidity, which is convenient for processing on the aluminum alloy thin-walled structure 3 The installation holes are convenient for welding operations, and at the same time, it...

Embodiment 2

[0047] Embodiment 2 is similar to Embodiment 1, except that in step 4), the radius of the boss 10 inside the spherical cap is 4mm larger than the radius of the mounting hole, and the thickness is 1.0mm, which can meet the requirements of providing sufficient weld leakage for Dressing and grinding, while ensuring that the boss 10 is self-melting. According to actual needs, the radius of the boss (10) is 3-4 mm larger than the radius of the mounting hole, and the thickness of the boss (10) is 0.5-1 mm, so as to ensure sufficient welding leakage allowance and facilitate the boss 10 Self-melting.

[0048] In the welding method of the small-diameter nozzle and the thin-walled aluminum alloy structure of the present invention, step 1) and step 2) can be carried out at the same time, or the operation of step 2) can be carried out first, and then the operation of step 1) can be carried out. The essence is Same, all are to the processing of small-diameter nozzle 2 and aluminum alloy t...

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Abstract

The invention discloses a method for welding a minor-diameter nozzle and an aluminum alloy thin-walled structure, and belongs to the field of a method for machining minor-diameter nozzles and aluminum alloy thin-walled structures. The method is characterized by comprising the following steps of: 1, machining an aluminum alloy thin-walled structure (3); 2, machining a minor-diameter nozzle (2); 3,assembling and positioning the aluminum alloy thin-walled structure (3); 4, assembling the minor-diameter nozzle (2) to an installation hole of the aluminum alloy thin-walled structure (3); 5, welding a joint of the minor-diameter nozzle (2) and the aluminum alloy thin-walled structure (3); and 6, removing recesses of the right sides and splatters of the wrong sides and nailhead-shaped weld leaksof weld joints by polishing. The method for welding the minor-diameter nozzle and the aluminum alloy thin-walled structure has the advantages of simple process, high quality of the weld joints and small deformation of workpieces.

Description

technical field [0001] The invention relates to a processing method for a small-diameter nozzle and an aluminum alloy thin-wall structure, in particular to a welding method for a small-diameter nozzle and an aluminum alloy thin-wall structure. Background technique [0002] The welding structure of vertical assembly of small-diameter nozzles and thin-walled spherical (crown) surfaces, arc surfaces, and flat plates is widely used in national key industries such as aviation, aerospace, oil pipelines, pressure vessels, and automobiles. Due to the huge difference in the structure of the small-diameter nozzle machined and the thin-walled sheet formed by sheet metal, the common welding heat source is not concentrated, and the interaction of the adjacent molten pool causes poor weldability, prominent quality problems and difficult deformation. Control, but the importance of the structure often has strict requirements on weld strength, weld compactness, fatigue resistance, etc. Such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/00B23K33/00B23K37/00
Inventor 王远荣
Owner CHENGDU SIWI HIGH TECH IND GARDEN
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