Measuring device and measuring method for welding seam strength

A technology of welding seam strength and measuring device, which is applied in the direction of measuring device, strength characteristics, and testing material strength by applying stable tension/pressure, which can solve the problem of inability to measure the strength of welded joints, and achieve the convenience and convenience of measurement. Quick fix, improve the effect of accuracy

Active Publication Date: 2016-07-13
YINBANG CLAD MATERIAL
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Problems solved by technology

due to L f b , as the tensile force F increases, the fins preferentially reach the tensile strength σ f Fracture occurs, unable to measure weld joint strength

Method used

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  • Measuring device and measuring method for welding seam strength
  • Measuring device and measuring method for welding seam strength
  • Measuring device and measuring method for welding seam strength

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Embodiment

[0074] Firstly, E-7 adhesive 42 in corresponding proportions was prepared according to the test requirements. A sample is cut out from the brazed material containing the fins 43 and the substrate 45 by EDM, and a compact 41 similar to the structure formed between the two fins 43 in the sample is made or selected for use. The sample size after the cutting is: the length of the substrate is 30mm, the width is 10mm (that is, the length of the weld is 10mm), the width of the weld is 1.2mm, and the area of ​​the weld is 1.2*10=12mm 2 , the fin 43 is located at the middle position of the base plate 45, and the length of the clampable part of the fin 43 is 30 mm. Each surface to be pasted of the sample and the pressing block 41 is polished. The surface to be pasted of the pressing block 41 is glued between two sides of the fin 43 of the sample by an adhesive 42 .

[0075] Place the well-bonded sample in the furnace, raise the temperature to 100°C, and keep it warm for 3h. In order...

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Abstract

The invention provides a measuring device and a measuring method for welding seam strength. The measuring device comprises a fin slot and a substrate slot, wherein the fin slot is a square structure; the side surface of the fin slot is provided with a wedge-shaped slot; the width of the upper end of the wedge-shaped slot is smaller than that of the upper end of the fin slot; the wedge-shaped slot is used for fixing a fin of a sample; the substrate slot is a square structure; and the side surface of the substrate slot is provided with a T-shaped slot which is used for fixedly mounting a substrate of the tested sample. According to the measuring device and the measuring method for the welding seam strength, a welding seam is fractured before a fin in a test sample tensile test process; meanwhile, the device can be used for clamping fins at the two sides, and can apply tensile force in a direction perpendicular to the plate surface of a composite plate, so that an inclination problem is avoided, the tensile strength value of a braze-welding welding seam can be measured more accurately, and the measuring accuracy is improved.

Description

technical field [0001] The invention mainly relates to the technical field of metal welding, in particular to a measuring device and a measuring method for the strength of a fin and a substrate brazed seam. Background technique [0002] Plate-fin heat exchangers are widely used in automobile heat dissipation systems, which have many advantages such as high heat dissipation efficiency, simple structure, and light weight. In the air cooling system of the power station, the plate-fin heat exchanger can also play the functions of saving water resources and protecting the environment. [0003] The plate-fin heat exchanger mainly adopts the brazing process to weld the fins on the aluminum / aluminum (or aluminum / steel) composite substrate to form a metallurgical weld. At present, the evaluation of this kind of brazing weld mainly focuses on the shear strength test method or metallographic observation method. The shear test requires high processing precision of the sample and requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/02
CPCG01N3/02G01N3/08G01N2203/0296
Inventor 孙畅李龙周德敬
Owner YINBANG CLAD MATERIAL
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