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Flat niti alloy electron beam welding anisotropic cooling device and its welding method

A technology of electron beam welding, heat dissipation and cooling, used in electron beam welding equipment, welding/welding/cutting items, welding equipment, etc.

Inactive Publication Date: 2020-12-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of the solidification line along the vertical direction formed after the electron beam welding of the existing flat NiTi alloy, the present invention further proposes a flat NiTi alloy electron beam welding anisotropic cooling device and its welding method

Method used

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  • Flat niti alloy electron beam welding anisotropic cooling device and its welding method
  • Flat niti alloy electron beam welding anisotropic cooling device and its welding method
  • Flat niti alloy electron beam welding anisotropic cooling device and its welding method

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specific Embodiment approach 1

[0027] Specific implementation mode one: combine Figure 1 to Figure 3 Describe this embodiment. This embodiment is a flat NiTi alloy electron beam welding anisotropic heat dissipation cooling device. Its composition includes a fixture bottom plate 1, a lower cooling copper plate 5, a lower thermal insulating ceramic plate 6, an upper cooling copper plate 8, and an upper thermal insulating ceramic plate. 9 and the fixture cover plate 10, the middle part of the upper end surface of the fixture bottom plate 1 is provided with a bottom plate groove 4, and the lower heat insulating ceramic plate 6 and the lower layer cooling copper plate 5 are arranged side by side in the bottom plate groove 4 along the width direction, and the fixture cover plate 10 is arranged on Directly above the fixture bottom plate 1, a cover plate groove 14 is arranged in the middle of the lower end surface of the fixture cover plate 10. In the cover plate groove 14, an upper layer cooling red copper plate 8...

specific Embodiment approach 2

[0038] Specific implementation mode two: combination figure 1 This embodiment is described. In this embodiment, a groove 3 is respectively provided in the middle of the front and rear ends of the bottom plate groove 4 on the fixture bottom plate 1 . The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0039]The groove 3 can prevent the electron beam from penetrating the sample and acting on the fixture, so as to protect the bottom plate 1 of the fixture.

specific Embodiment approach 3

[0040] Specific implementation mode three: combination figure 1 This embodiment is described. In this embodiment, gaps are provided between the lower thermal insulation ceramic plate 6 and the lower cooling copper plate 5 and between the upper cooling copper plate 8 and the upper thermal insulation ceramic plate 9 . The undisclosed technical features in this embodiment are the same as those in the second embodiment.

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Abstract

The invention relates to a heterotropic heat dissipation and cooling device for NiTi alloy electron beam welding of a flat plate and a welding method thereof, relates o the technical field of welding,and is aimed at solving the problem of solidification lines in the vertical direction formed after the NiTi alloy electron beam welding of the existing flat plate. A lower heat insulation ceramic plate and a lower cooling copper plate are arranged in a groove of a baseplate of the heterotropic heat dissipation and cooling device side by side in the width direction; an upper cooling copper plate and an upper heat insulation ceramic plate are arranged in a groove of a cover plate side by side in the width direction; the upper cooling copper plate is arranged above the lower heat insulation ceramic plate; the upper heat insulation ceramic plate is arranged above the lower cooling copper plate; and a clamp cover plate and a clamp baseplate are fixedly connected through a plurality of fastening bolts. The welding method comprises the following steps of: pretreating base metals to be welded; clamping the base metals to be welded; assembling the base metals to be welded and the heterotropicheat dissipation and cooling device in a vacuum chamber; welding; and cooling. The heterotropic heat dissipation and cooling device and the welding method are used for the NiTi alloy electron beam welding of the flat plate.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an anisotropic cooling device for flat NiTi alloy electron beam welding and a welding method thereof. Background technique [0002] NiTi shape memory alloy is currently the material with the best shape memory performance among shape memory materials, and it has a wide range of applications in the fields of clinical medicine and aerospace, such as artificial bones, fixed pressure devices for injured bones, various intracavitary stents, heart Patches and satellite dishes etc. For some parts with special structures, they need to be connected and used. Welding is the most common processing method to connect two metal parts or multiple metal parts into one part, so it is particularly important to study its weldability. When NiTi shape memory alloy is welded, the liquid metal in the molten pool spontaneously solidifies to the position where the high-energy electron beam acts during t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/00B23K15/06B23K37/04
CPCB23K15/0026B23K15/0033B23K15/0093B23K15/06B23K37/0408B23K2103/08B23K2103/14
Inventor 陈国庆柳峻鹏树西张戈尹乾兴张秉刚
Owner HARBIN INST OF TECH
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