CN213337450U

CN213337450U - Be used for pass inner wall defect location, quantitative eddy current testing frock

Info

Publication number: CN213337450U
Application number: CN202022064976.9U
Authority: CN
Inventors: 张家瑞; 杨书勤; 张亚荣; 钟丽英; 王宇魁
Original assignee: AVIC Shaanxi Aircraft Industry Group Corp Ltd
Current assignee: Shaanxi Aircraft Industry Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-06-01
Anticipated expiration: 2030-09-18

Abstract

The invention belongs to the field of aviation detection, and relates to a hole type inner wall defect positioning and quantifying eddy current detection tool, which comprises a shell, a slot, a bolt, an anti-slip pad, a scale, scale marks, scales and coil position scale marks; during detection, the combined probe is inserted into the hole pattern, the depth position of the detection coil is guaranteed by means of the shell, the probe is rotated, the shell is kept still under the action of the anti-slip pad, stepping scanning is adopted according to the position of the scale, after a defect is found, marking is carried out on the shell according to the position of the coil, the scale of the scale is recorded, and after a defect detection signal disappears, marking and recording are carried out again, so that the defect is positioned and quantified. The utility model is suitable for a vortex detection of various pass inner walls, overcome the influence of surface about the pass position, can fix a position, the defect of discovery in the quantitative determination has improved detection efficiency and detection quality.

Description

Be used for pass inner wall defect location, quantitative eddy current testing frock

Technical Field

The utility model belongs to the aerial detection field is very much to the eddy current testing of pass inner wall, can realize location, ration to the pore wall defect of eddy current testing discovery. The utility model relates to a have easy and simple to handle, improve detection efficiency's characteristics.

Background

Eddy current testing is a conventional non-destructive testing method based on the principle of electromagnetic induction. The method has the characteristics of no need of a coupling agent during detection, high detection speed, high detection sensitivity and the like; the defects on the surface and the near surface of the workpiece can be well evaluated. The unique expertise of eddy current testing is irreplaceable by other non-destructive testing methods.

Eddy current inspection is the most effective common inspection method in aircraft overhaul and D inspection, and often meets the inspection task of the inner wall of a hole pattern such as a through hole, a bolt hole and the like, the upper surface and the lower surface of the hole pattern part (the upper surface of a blind hole) can influence the inspection result (edge effect), the defect judgment is interfered, and the inspection efficiency and the inspection quality are influenced because the defects detected in the hole wall cannot be observed and measured by naked eyes.

The eddy current inspection tool for the defects of the inner wall of the hole pattern is designed by the research, namely, the influence of the edge effect on the inspection result is removed, the defects found in the process of positioning and quantitative inspection are realized, and the inspection efficiency and the quality are improved.

Disclosure of Invention

1. Solves the technical problem

The utility model overcomes in the past the influence of pass position upper and lower surface (blind hole upper surface) to can fix a position, the defect of discovery in the quantitative determination, the utility model is suitable for a vortex detection of various pass inner walls, like common bolt hole inner wall vortex detection. The utility model discloses a provide a convenient operation, nimble use has got rid of the influence of edge effect, directly detects, general detection method under certain condition.

2. Technical scheme

In order to solve the technical problem, the utility model relates to a tool for positioning defects of a hole type inner wall and quantitatively detecting eddy currents, which comprises a hole type inner wall eddy current detection probe, a scale, a shell assembly and a detection probe coil; the shell assembly is formed by butting two step-shaped semi-cylindrical shells, each semi-cylindrical shell is provided with a semi-circular through hole along the axis, and a pin shaft and a pin hole are arranged on the butting surface; the shell assembly is sleeved at the root of a probe rod of the eddy current detection probe on the inner wall of the hole pattern, the shell assembly and the probe rod are matched through a small clearance, and the probe rod can rotate and axially move in a through hole of the shell assembly; the detection probe coil is arranged in the hole type inner wall eddy current detection probe; and a scale is arranged on the side surface of the eddy current detection probe on the inner wall of the hole pattern.

Preferably, in order to prevent the shell assembly from damaging the hole edge and the detection probe in the test process, the lower end of the shell assembly is provided with a non-slip pad made of a soft material; meanwhile, the shell assembly is made of a material with good plasticity.

The utility model provides a be used for pass inner wall defect location, quantitative eddy current testing frock relies on two casings, scale to assemble in the pole portion of vortex pass probe and reaches the purpose that control probe is step-by-step, location, quantitative defect.

3. Advantageous effects

The influence of the upper surface and the lower surface (the upper surface of the blind hole) of the conventional hole type part is overcome, the defect position can be positioned (the defect position can be determined by marking lines and scale coordinates according to the coil position), the defect length can be determined quantitatively (the defect length can be determined by the scale coordinates and a display signal), and the detection efficiency and quality are improved.

Drawings

Figure 1 is a schematic structural view of the utility model,

figure 2 is a schematic view of the structure of the housing assembly,

figure 3 is a schematic view of a scale structure,

wherein, 1 is a hole-shaped inner wall eddy current detection probe, 2 is a scale, 2a is a scale mark, 2b is a scale, 2c is a coil position reticle, 3 is a shell component, 3a is a slot, 3b is an anti-skid pad, 3c is a bolt, and 4 is a detection probe coil.

Detailed Description

The utility model discloses a be used for pass inner wall defect location, quantitative eddy current testing do the detailed description with the accompanying drawing:

as shown in fig. 1, the utility model provides a be used for pass inner wall defect location, quantitative eddy current testing frock, with two semicylinder casings straining in eddy current probe pole portion of casing subassembly before developing the detection, the scale is pasted in eddy current probe pole portion, require casing subassembly's upper surface and scale mark "0.5" scale to align, coil position groove aligns with probe coil position, the schematic diagram is seen in fig. 1, because the eddy current flaw detector is when pass inner wall test, there is marginal effect size, in order to avoid this kind of harmful effects, this scheme has been designed the utility model discloses a second grade step size just in time blocks the probe part, reaches marginal effect size and is 0.5mm, directly uses the frock to remove the eddy current testing blind area.

On the basis of the design of the detection tool, the through hole in the middle of the shell component is a conical step hole, and the conical hole at the lower end can wrap half of the hole-shaped inner wall eddy current detection probe so as to ensure the detection of the upper edge hole wall of the hole to be detected.

On the design basis of above-mentioned detection frock, the casing adopts plastics to make, adopts plastics, and the processing cost is low, easy shaping, and eddy current testing is mostly the on-the-spot problem processing, and the field troubleshooting, and this scheme is made to plastics utility model is comparatively light, does benefit to the scene and carries, detects.

On the basis of the design of the detection tool, the tool often moves along with the probe in the actual test process, and after the defect is found to be marked on the shell, the shell moves to cause the defect to be positioned inaccurately, and the risk of damaging a paint layer and an adhesive layer on the surface of a part exists; in order to prevent the shell component from being driven to rotate in the rotating process of the hole-shaped inner wall eddy current detection probe rod, an anti-slip pad is arranged on the lower end face of the shell component; the non-slip mat is made of rubber with high roughness so as to enhance the non-slip performance.

On the basis of the design of the detection tool, in order to facilitate the detection of the inner walls of the holes with various specifications, a secondary step is designed, the coil position is ensured to be fixed, and the head of the probe is slightly larger than the rod part and can be suitable for the detection of all the inner walls of the holes. During operation, a probe which is to be combined is inserted into the hole pattern, the depth position of the detection coil is guaranteed by means of the shell assembly, the probe is rotated, the shell is kept still under the action of the anti-slip pad, stepping scanning is adopted according to the position of the scale, after a defect is found, marking is carried out on the shell according to the line of the coil position, the scale marks are marked, and after a defect detection signal disappears, marking and recording are carried out again, so that the defect positioning and quantifying are achieved.

Claims

1. The utility model provides a be used for pass inner wall defect location, quantitative eddy current testing frock which characterized in that: the detection tool comprises a hole-shaped inner wall eddy current detection probe, a scale, a shell assembly and a detection probe coil; the shell assembly is formed by butting two step-shaped semi-cylindrical shells, each semi-cylindrical shell is provided with a semi-circular through hole along the axis, and a pin shaft and a pin hole are arranged on the butting surface; the shell assembly is sleeved at the root of a probe rod of the eddy current detection probe on the inner wall of the hole pattern, the shell assembly and the probe rod are matched through a small clearance, and the probe rod can rotate and axially move in a through hole of the shell assembly; the detection probe coil is arranged in the hole type inner wall eddy current detection probe; and a scale is arranged on the side surface of the eddy current detection probe on the inner wall of the hole pattern.

2. The tool for positioning defects of inner walls of holes and quantitatively detecting eddy currents as claimed in claim 1, is characterized in that: the through hole in the middle of the shell component is a conical step hole, and the conical hole at the lower end can wrap half of the hole type inner wall eddy current detection probe.

3. The tool for positioning defects of inner walls of holes and quantitatively detecting eddy currents as claimed in claim 1 or 2, is characterized in that: and the lower end of the shell assembly is provided with an anti-slip pad.

4. The tool for positioning defects of inner walls of holes and quantitatively detecting eddy currents as claimed in claim 1, is characterized in that: the scale is adhered to the probe rod of the hole-shaped inner wall eddy current detection probe.

5. The tool for positioning defects of inner walls of holes and quantitatively detecting eddy currents as claimed in claim 1 or 4, wherein the tool comprises: the scale is at least provided with scale marks, scales and coil position scale lines.

6. The tool for positioning defects of inner walls of holes and quantitatively detecting eddy currents as claimed in claim 1 or 4, wherein the tool comprises: the shell assembly is made of a material with good plasticity.