Device for simulating weak joint defect of diffusion weld interface

A diffusion welding and interface technology, which is applied to the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problem of difficulty in obtaining ultrasonic signals, and achieve the effect of ensuring the quality of diffusion welding and improving the detection rate.

Inactive Publication Date: 2008-06-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device for simulating the weak joint defect of the diffusion welding interface to solve the problem that the ultrasonic signal of the weak joint defect in the diffusion welding interface is difficult to obtain

Method used

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  • Device for simulating weak joint defect of diffusion weld interface
  • Device for simulating weak joint defect of diffusion weld interface

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Experimental program
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specific Embodiment approach 1

[0007] Specific Embodiment 1: This embodiment is described in conjunction with Fig. 1 and Fig. 2. This embodiment is composed of a compression device 1, an ultrasonic signal acquisition device 2, a probe 3 and a water tank 4. The compression device 1 consists of a bracket 5 and a left pad 6 , right spacer 7, left pressure piece 8, right pressure piece 9 and four fastening bolts 10, left spacer 6 and right spacer 7 are respectively arranged on both sides of the upper end surface of bracket 3, and the upper end of left spacer 6 A left pressing block 8 is provided, a right pressing block 9 is provided on the upper end of the right cushion block 7, a transverse through hole 11 is arranged on the left pressing block 8 and the right pressing block 9, and the threaded end of the fastening bolt 10 passes through the transverse through hole 11 Fastened in the threaded hole 51 on the bracket 5, a gasket 14 is provided between the fastening bolt 10 and the left pressing block 8 or the rig...

specific Embodiment approach 2

[0008] Embodiment 2: This embodiment is described in conjunction with FIG. 2 . In this embodiment, the lower end surfaces of the left pressing block 8 and the right pressing block 9 are provided with a pressure head 15, and the pressure head 15 converts the tightening force into a downward pressing force.

[0009] The method of the present invention to simulate the weak joint defects of different gaps in the diffusion welding interface is as follows:

[0010] (1). Simulate a very tight weak joint defect that is fitted: two methods can be used to realize the simulation of this defect, see Figure 3, the first method: the pressure on the left pressure block 8 and the right pressure block 9 The head 15 is placed close to the center of the diffusion welding sample, leaving only a space for the incidence of the ultrasonic sound beam 16 in the middle, and the force exerted by the indenter 15 is limited to the central area, so that the upper diffusion welding sample 12 and the lower si...

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Abstract

A device used for stimulating the diffusion welding interface poor jointing defect is provided, which relates to the stimulating device of diffusion welding interface defect. The invention aims to solve the problem that supersonic signal is difficult to obtain caused by diffusion welding interface poor jointing. A pressing device (1) is composed of a supporting frame (5), a left cushion block (6), a right cushion block (7), a left pressing block (8), a right pressing block (9) and four fixing bolts (10). The two sides of the upper end surface of the supporting frame 3 are provided with the left cushion block (6) and a right cushion block (7), the upper end of the left cushion block (6) is provided with the pressing block (8), the upper end of the right cushion block (7) is provided with a right pressing block (9), the fixing bolts are fixed in a thread hole (51) of the supporting frame, the pressing device (1) is arranged in a water groove (4), a detector (3) is connected with a supersonic signal collecting device (2) through lead (17), and the head of the detector (3) is arranged above the pressing device (1). By adjusting the position of the pressing block, the tightening force of the fixing bolts and the height of the cushion block, the invention realizes stimulating the poor jointing defect of different clearances.

Description

technical field [0001] The invention relates to a simulation device for diffusion welding interface defects. Background technique [0002] Diffusion welding is to make the surfaces to be welded touch each other under a certain temperature and pressure, and expand the physical contact of the surfaces to be welded through microscopic plastic deformation or through a small amount of liquid phase generated on the surface to be welded, and then, after a long period of atomic A welding method that achieves bonding by interdiffusion. Since the diffusion bonding base metal does not need to be melted, dissimilar materials that do not dissolve each other or produce brittle intermetallic compounds during welding can be welded, and this welded structure has excellent mechanical properties and organizational structure, so it is widely used in aviation, aerospace, etc. Applications in the field of technology are becoming more and more widespread. The quality assurance of diffusion weldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 刚铁栾亦琳徐振亚刘晓楠袁媛
Owner HARBIN INST OF TECH
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