Vacuum electron beam welding method for thin-walled titanium alloy assembly

A technology of vacuum electron beam welding and vacuum electron beam, applied in electron beam welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of low qualification rate, high requirements on the coaxiality of parts, and difficult process technology.

Inactive Publication Date: 2006-04-26
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the geometric dimensions of the components after welding are very strict, the shortening after welding and the coaxiality of the

Method used

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  • Vacuum electron beam welding method for thin-walled titanium alloy assembly
  • Vacuum electron beam welding method for thin-walled titanium alloy assembly
  • Vacuum electron beam welding method for thin-walled titanium alloy assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The material used for the welding test is a TC11 thin plate with a thickness of 2.0mm, and its chemical composition is shown in Table 1:

[0044] alloy element,%

Impurities, %, not greater than

Al

Mo

Zr

Si

Ti

Fe

C

N

H

O

sum of other

5.8～7.0

2.8～3.8

0.8～2.0

0.20～0.35

margin

0.25

0.10

0.05

0.012

0.15

0.3

[0045] The welding test equipment is KS120-G300KM vacuum electron beam welding machine: high voltage 90-150KV, with 16 kinds of waveforms, and a large frequency modulation range.

[0046] A large number of tests have been carried out by using different welding parameter combinations for TC11 plates with the same thickness and the same state. Some data are shown in Table 2 and Table 3.

[0047] Table 2150KV same frequency variable waveform welding parameter table

[0048]

[0049] Table 3 Triangular wave acceleration volta...

Embodiment 2

[0053] Welding of aircraft engine bellows, bellows structure see figure 1 , Assemble the single box of the same group on the single box welding tool, check the assembly quality, and after confirming that it is correct, vacuumize to 2×10 -2 Above Pa, tack welding is performed first, then seal welding, then penetration welding, and finally finishing welding. The welding parameters are shown in Table 4. Out of the warehouse, the appearance inspection of the weld seam (the inner cavity can be carried out with the help of a lens), and the welding of the next single piece is carried out after passing the standard. Each set of bellows components has three single boxes.

[0054] Table 4 Diaphragm assembly single box (Φ150) vacuum electron beam welding parameter list

[0055]

[0056] Assemble the three single boxes and two flanges that are qualified for welding, and vacuumize to 2×10 -2 Above Pa, tack welding is performed first, then seal welding, then penetration welding, and f...

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Abstract

The invention relates to a vacuum electric beam welding method of a thin wall titanium alloy component which suits for the TC11 material component with 1.5í½3.4mm wall thickness. It is characterized in that the parameter of the vacuum electric beam welding craft is that positioning weld: even positioning with the accelerate voltage 150kv, the working muzzle distance 200-1200mm, the welding speed 8.3mm/s, and the welding beam current 2.5mA; the sealed weld: the accelerate voltage 150kv, the working muzzle distance 200-1200mm, sway wave shape triangle wave, the sway frequency 20Hz, the sway amplitude 1.2mm, the welding speed 8.3mm/s, the welding beam current 1.5mA; formal weld: the accelerate voltage 150kv, the working muzzle distance 200-1200mm, sway wave shape triangle wave, the sway frequency 20Hz, the sway amplitude 1.2mm, the welding speed 8.3mm/s, the welding beam current 4.4mA.

Description

Technical field: [0001] The invention relates to welding technology, and in particular provides a vacuum electron beam welding method for thin-walled TC11 titanium alloy components. Background technique: [0002] Thin-walled titanium alloy components are often used in the aerospace field. Taking the aircraft engine bellows assembly as an example, it is the elastic connection shaft between the front and rear transmission casings, and its function is to eliminate the bending deformation caused by the shaft bending deformation when the aircraft turns. stress. Its structure is as figure 1 shown. This piece is a thin-walled bellows welded component: it is connected by three waves, six discs, two flanges and seven welds. The material is TC11, the thickness of the weld is 2.2mm, the thickness of the diaphragm is 0.9mm, the outer diameter of the diaphragm box is Φ150mm, and the inner diameter is Φ60mm. The wave spacing is about 27.8mm, the final total length is 117mm, and the tot...

Claims

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Application Information

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IPC IPC(8): B23K15/06
Inventor 刘成来曲伸戴惠风
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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