CN104165930A - On-line detection process for internal defects of high silica screen cloth - Google Patents
On-line detection process for internal defects of high silica screen cloth Download PDFInfo
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- CN104165930A CN104165930A CN201410402651.3A CN201410402651A CN104165930A CN 104165930 A CN104165930 A CN 104165930A CN 201410402651 A CN201410402651 A CN 201410402651A CN 104165930 A CN104165930 A CN 104165930A
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Abstract
The invention discloses an on-line detection process for internal defects of high silica screen cloth. In the process, the inside of a product is detected by ultrasonic waves, and ultrasonic wave images are acquired to determine whether the product is qualified. Therefore, the requirement on a detection environment is low, the detection and determination speed is high, and the process has wide market prospects.
Description
Technical field
The invention belongs to extraordinary new material technology field, be specifically related to the online characterization processes of a kind of high silica screen cloth inherent vice.
Background technology
First die pressing is mixed and made into premix by high silica yarn, line or short blank and phenolics, then premix is put into mould heating pressurization is cured, and finally forms composite products.This technique is tradition comparatively, production equipment aspect problem is little, subject matter is in premix, usually to contain some volatile matters such as low molecular impurity, solvent, thereby in preparation process, very easily makes composite material surface and inner crackle, pore, slag inclusion, the defect such as loose of forming.In addition, often there is a lot of human factors and technique instability in premix making, lay, solidification process, and product quality cannot be ensured.Only have the rational technological parameter of setting, carry out reliable process control, Real-Time Monitoring product defects, just can enhance product performance, and reduces inherent vice, improves yield rate and reliability, accomplishes scale production, and this is particularly crucial in war products are produced.
UT (Ultrasonic Testing) is to utilize the acoustical behavior difference of material and defect thereof the energy variation of ultrasonic propagation waveform reflection case and time of break-through to be carried out to the lossless detection method of experimental material inherent vice.
Pulse reflection method is compressional wave in the time of normal beam testing, shear wave in the time of oblique fire flaw detection.Pulse reflection method has compressional wave flaw detection and detection with transversal waves.On ultrasonic instrument oscillography screen, represent the travel-time of sound wave with horizontal ordinate, represent echo signal amplitude with ordinate.For same uniform dielectric, the travel-time of pulsating wave is directly proportional to sound path.Therefore can be judged by the appearance of flaw echoes the existence of defect; The distance of defect apart from test surface determined in the position that can be occurred by echoed signal again, realizes defect location; Judge the equivalent size of defect by echo amplitude.
Summary of the invention
The present invention is directed to above shortcoming, be based on solving existing high silica screen cloth Inner Defect Testing time length and the problem high to conditional request.Design the online characterization processes of a kind of high silica screen cloth inherent vice.This technique, by utilizing ultrasound wave to survey interiors of products, is obtained ultrasonography and is differentiated whether product is qualified.
For realizing object of the present invention, the technical solution used in the present invention is:
The online characterization processes of high silica screen cloth inherent vice, comprises the following steps:
(1) ultrasonic probe is laterally arranged on to a side in tank;
(2) high silica screen cloth is hung up in tank, and open ultrasound wave high silica screen cloth is scanned;
(3) echoed signal scanning reflection being obtained is sent to computing machine by data line, and computing machine extracts the defect in picked up signal and be corresponding with characteristic quantity, generates ultrasonography;
(4) judge that according to generating ultrasonography acquisition interiors of products image information whether product is qualified;
(5) acceptance or rejection product is sorted out to processing.
Preferentially, different with thickness according to institute's linked network cloth kind, the mode that hangs up in step (2) hangs up or one side hangs up for folding.
Preferentially, ultrasound wave proportion 20-30GHz in described step (2).
Advantage of the present invention is: by utilizing ultrasound wave to survey interiors of products, obtains ultrasonography and differentiates whether product is qualified, and low to the environmental requirement detecting, detect distinguishing speed fast, there are wide market outlook.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
Embodiment 1
The online characterization processes of high silica screen cloth inherent vice, comprises the following steps:
(1) ultrasonic probe is laterally arranged on to a side in tank, tank is that size length, width and height are 1.5m*1m*1m;
(2) high silica molten iron screen cloth folding hanging is placed in tank, and opens ultrasound wave high silica screen cloth is scanned, ultrasonic frequency is 20GHz;
(3) echoed signal scanning reflection being obtained is sent to computing machine by data line, and computing machine extracts the defect in picked up signal and be corresponding with characteristic quantity, generates ultrasonography;
(4) ultrasonography shows that product surface is level and smooth, even air hole distribution, and without obvious crackle, the porosity is low, and it is qualified to judge;
(5) to qualified product assortment processing.
Embodiment 2
The online characterization processes of high silica screen cloth inherent vice, comprises the following steps:
(1) ultrasonic probe is laterally arranged on to a side in tank, tank is that size length, width and height are 1.5m*1m*1m;
(2) high silica molten steel screen cloth folding hanging is placed in tank, and opens ultrasound wave high silica screen cloth is scanned, ultrasonic frequency is 30GHz;
(3) echoed signal scanning reflection being obtained is sent to computing machine by data line, and computing machine extracts the defect in picked up signal and be corresponding with characteristic quantity, generates ultrasonography;
(4) ultrasonography shows that product surface is more coarse, has obvious crackle, and the porosity is higher, judges defective;
(5) substandard product is sorted out to the labeling processing that lowers category.
Claims (3)
1. the online characterization processes of high silica screen cloth inherent vice, comprises the following steps:
(1) ultrasonic probe is laterally arranged on to a side in tank;
(2) high silica screen cloth is hung up in tank, and open ultrasound wave high silica screen cloth is scanned;
(3) echoed signal scanning reflection being obtained is sent to computing machine by data line, and computing machine extracts the defect in picked up signal and be corresponding with characteristic quantity, generates ultrasonography;
(4) obtain interiors of products image information according to the ultrasonography generating and judge that whether product is qualified;
(5) acceptance or rejection product is sorted out to processing.
2. the online characterization processes of high silica screen cloth inherent vice according to claim 1, is characterized in that: the mode that hangs up in described step (2) hangs up or one side hangs up for folding.
3. the online characterization processes of high silica screen cloth inherent vice according to claim 1, is characterized in that: in described step (2), ultrasound wave proportion is 20-30GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402651.3A CN104165930A (en) | 2014-08-17 | 2014-08-17 | On-line detection process for internal defects of high silica screen cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402651.3A CN104165930A (en) | 2014-08-17 | 2014-08-17 | On-line detection process for internal defects of high silica screen cloth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104165930A true CN104165930A (en) | 2014-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410402651.3A Pending CN104165930A (en) | 2014-08-17 | 2014-08-17 | On-line detection process for internal defects of high silica screen cloth |
Country Status (1)
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| CN (1) | CN104165930A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127618A (en) * | 2008-11-25 | 2010-06-10 | Amatsuji Steel Ball Mfg Co Ltd | Automatic sphere inspection method and device for the same with ultrasonic flaw detection system |
| CN103822970A (en) * | 2014-03-05 | 2014-05-28 | 吉林大学 | Portable full automatic resistance spot welding ultrasonic detecting instrument and detecting method |
| CN103926320A (en) * | 2013-12-04 | 2014-07-16 | 中航复合材料有限责任公司 | Nonlinear ultrasonic imaging detection method based on automatic scanning |
-
2014
- 2014-08-17 CN CN201410402651.3A patent/CN104165930A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127618A (en) * | 2008-11-25 | 2010-06-10 | Amatsuji Steel Ball Mfg Co Ltd | Automatic sphere inspection method and device for the same with ultrasonic flaw detection system |
| CN103926320A (en) * | 2013-12-04 | 2014-07-16 | 中航复合材料有限责任公司 | Nonlinear ultrasonic imaging detection method based on automatic scanning |
| CN103822970A (en) * | 2014-03-05 | 2014-05-28 | 吉林大学 | Portable full automatic resistance spot welding ultrasonic detecting instrument and detecting method |
Non-Patent Citations (2)
| Title |
|---|
| 曾光宇等: "《高硅氧复合材料声学特性检测研究》", 《应用基础与工程科学学报》 * |
| 王浩全等: "《高硅氧复合材料的超声成像检测》", 《无损检测》 * |
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Application publication date: 20141126 |
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| RJ01 | Rejection of invention patent application after publication |