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Brazing filler metal for braze welding of closed impeller and braze welding assembly method

A technology of closed impeller and brazing method, applied in the direction of welding/cutting medium/material, welding equipment, welding medium, etc., can solve the problems of impeller blade deformation, uneven assembly gap, large assembly gap, etc., and achieve good concentricity , good adhesion and good uniformity

Active Publication Date: 2022-01-14
GUIZHOU YONGHONG AVIATION MACHINERY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims to provide a brazing filler metal for closed impeller brazing and a brazing assembly method to solve the problems existing in the brazing filler metal assembly of the existing closed impeller Problems such as large assembly clearance, uneven assembly clearance, deformation of impeller blades, etc.

Method used

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  • Brazing filler metal for braze welding of closed impeller and braze welding assembly method
  • Brazing filler metal for braze welding of closed impeller and braze welding assembly method
  • Brazing filler metal for braze welding of closed impeller and braze welding assembly method

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Embodiment Construction

[0054] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the claims of the present invention is not limited to the content listed in this embodiment.

[0055] Such as figure 1 and figure 2 Shown are the shapes of the two brazing materials used for closed impeller brazing (or the initial shapes of the first brazing material 1 and the second brazing material 2 before pre-pressing).

[0056] Such as figure 1 The first brazing filler metal cutting model used for cutting the first brazing filler metal 1 is made of a stainless steel plate with a material of 1Cr18Ni9Ti and a thickness of 1 mm. Evenly distributed in the direction, the interval between the connected cutting lines is 45°±2°, the length of the cutting lines is 15mm, and the cutting lines are used to cut out the first linear incision 3.

[0057] Such as figure 2 , the second solder cutting model used for the second sold...

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Abstract

The invention provides brazing filler metal for braze welding of a closed impeller and a braze welding assembly method. The brazing filler metal comprises first brazing filler metal and second brazing filler metal which are different in initial shape; during braze welding assembly, through cooperation of a first forming die, a second forming die, a concentric positioning clamp, a braze welding clamp, an impeller pressing device and a special wrench, the impeller, the first brazing filler metal, a cap and the second brazing filler metal are assembled. The problems that when the closed impeller is assembled through an existing machining method and tool, deformation is prone to occurring, brazing gaps are not uniform and too large, and the rejection rate is high are solved.

Description

technical field [0001] The invention belongs to the technical field of salt-bath brazing processing of closed impellers, and in particular relates to a closed impeller brazing filler metal, a closed impeller assembly method using the brazing filler metal, and a matching assembly device. Background technique [0002] Due to its structural limitations and complexity, the closed impeller is mainly welded by salt bath brazing. The assembly of the impeller, cap and solder before brazing is extremely important to ensure the welding quality. [0003] In the existing impeller assembly method, the solder is directly cut, and there are burrs and flashes on the edges. If they are not removed or flattened, the gap between the impeller and the cap will be too large, resulting in failure of brazing. When the impeller and the cap are assembled, they are not guaranteed to be concentric. When the brazing fixture is tightened, it is easy to be deflected and cause the blade to deform. At pre...

Claims

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Application Information

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IPC IPC(8): B23K1/00B23K1/20B23K3/08B23K35/02B23K35/40
CPCB23K1/0002B23K1/20B23K1/206B23K3/08B23K3/087B23K35/02B23K35/40
Inventor 肖友红吴长洪冉春交叶炳段启柱
Owner GUIZHOU YONGHONG AVIATION MACHINERY
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