CN111537521B - Film-coated fluorescence penetration detection method for optical glass surface microcracks - Google Patents

Film-coated fluorescence penetration detection method for optical glass surface microcracks Download PDF

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CN111537521B
CN111537521B CN202010415345.9A CN202010415345A CN111537521B CN 111537521 B CN111537521 B CN 111537521B CN 202010415345 A CN202010415345 A CN 202010415345A CN 111537521 B CN111537521 B CN 111537521B
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optical glass
film
penetration
detection
microcracks
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CN111537521A (en
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沈杰
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Nantong Guoguang Optical Glass Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/91Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

The invention discloses a film-coated fluorescence penetration detection method for optical glass surface microcracks, which belongs to the technical field of optical glass detection, and is characterized in that a film-coated heating method is utilized to detect that a penetration solution exists between a film and an optical glass sample with detection to form a permeation layer, the rapid diffusion of the penetration detection solution on an optical glass sample plate is facilitated to a certain extent after heating, when the detected optical glass sample has microcracks, gas exists in the microcracks, and after film coating, the heated space is certain relative to that of the uncoated glass sample under the heated condition, the expansion of the microcracks is facilitated, so that the penetration detection solution is facilitated to penetrate into the microcracks, compared with the prior direct coating method, the detection speed of the detection method is higher, the detection time can be shortened, and the viewing effect cannot be influenced by poor permeability caused by tiny microcracks, the method effectively improves the visual color development effect of the microcracks.

Description

Film-coated fluorescence penetration detection method for optical glass surface microcracks
Technical Field
The invention relates to the technical field of optical glass detection, in particular to a film-coated fluorescence penetration detection method for optical glass surface microcracks.
Background
The optical glass refers to glass capable of changing the propagation direction of light and changing the relative spectral distribution of ultraviolet, visible or infrared light, and can be colored optical glass, laser glass, quartz optical glass, radiation-resistant glass, ultraviolet infrared optical glass, fiber optical glass, acousto-optic glass, magneto-optic glass and photochromic glass. The optical glass can be used for manufacturing lenses, prisms, reflectors, windows and the like in optical instruments according to different purposes.
With the continuous development of industrial technology, modern technology has raised higher processing and use requirements for optical elements, which also increases the difficulty of the process. Rough grinding, finish grinding and polishing are three basic procedures of optical element processing. Each process has its role in the formation of the optical surface. The rough grinding aims at removing most of allowance of a blank and ensuring certain geometric shape precision and surface roughness, and the process is finished by milling of a fixed diamond grinding tool; the fine grinding is prepared for polishing, and is required to achieve a more accurate geometric shape and have a smaller crack layer depth, and the process is finished by grinding through a loose abrasive; polishing is to achieve the desired optical surface. The milling process is to grind the glass by using a diamond grinding tool fixed with grinding materials.
The cold working process adopted at present, namely the rough grinding, the fine grinding and the polishing process mentioned above, is very easy to leave subsurface damage on the surface layer of the optical material, and further influences the laser damage threshold and the fracture strength of the optical element, so that the detection of the cracks on the surface of the optical glass is very necessary. Among them, the penetration test is one of five conventional test techniques for nondestructive testing, and is a nondestructive testing method for inspecting surface opening defects based on the capillary action principle. In the prior art, a detection agent is usually only arranged on the end face of an article with detection to realize that the detection agent permeates into cracks to develop color, but the natural permeation speed is slow, so that the detection speed is slow; in addition, when the micro cracks are very small, the natural penetration is difficult to achieve a good penetration effect, and for some very small micro cracks, the visual effect is not good.
Therefore, a film-coated fluorescence penetration detection method for optical glass surface microcracks is provided to effectively improve the detection effect.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a film-coated fluorescence penetration detection method for the microcracks on the surface of optical glass, which is beneficial to the rapid diffusion of a penetration detection solution at the bottom end of a film on an optical glass sample plate to a certain extent by utilizing a film-coated heating method, and is beneficial to the expansion of the microcracks under the heating condition after film coating when the microcracks exist on a detected optical glass sample and gas exists in the microcracks, so that the penetration detection solution is more beneficial to penetrate into the microcracks.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A film-coated fluorescence penetration detection method for optical glass surface microcracks is characterized in that: the detection method comprises the following specific steps:
s1, surface treatment of the detection sample and preparation of the penetration detection solution: selecting a plurality of optical glass samples to be detected, cleaning the surfaces of the optical glass samples, airing the optical glass samples, placing the optical glass samples on an operation table for later use, and preparing a penetration detection solution for later use;
s2, preparation of an auxiliary permeable membrane: uniformly coating the permeation detection solution obtained in the step S2 on a film to obtain an auxiliary permeation film;
s3, film penetration treatment of optical glass: the auxiliary permeable film obtained in the step S2 is laid flat and attached to the optical glass sample in the step S1, and a permeable layer is formed between the auxiliary permeable film and the optical glass sample;
s4, film pressing thermal expansion treatment: pressing the auxiliary permeable film in the step S3 by a pressing device to ensure that the auxiliary permeable film can be closely attached to the surface of the optical glass sample, and heating the upper end surface of the auxiliary permeable film to intensify the osmotic motion of the osmotic detection solution;
s5, fluorescence detection of the optical glass sample: after the optical glass sample is cooled, the penetration detection solution is tightly attached to the cracks, the auxiliary penetration film on the optical glass sample is torn off, the penetration detection solution on the surface of the optical glass sample is removed, the surface of the optical glass sample is irradiated by an ultraviolet lamp in a dark place, and the parts with the cracks can emit bright fluorescence so as to detect.
Further, the preparation method of the permeation detection solution in S1 includes: selecting a fluorescent agent, a dispersing agent and expansive soil in a certain mass ratio, mixing and stirring, wherein the mass ratio of the fluorescent agent to the dispersing agent to the expansive soil is 2:1:0.5, obtaining a penetration detection solution, and adding the fluorescent agent to further improve the color development effect.
Further, the thermal expansion processing time in S4 is 5-7min, the heating temperature is 65-90 ℃, and the heating temperature rise processing is utilized, so that on one hand, rapid diffusion and permeation of the permeation detection solution is facilitated, and on the other hand, when a micro crack exists on the detected optical glass sample, gas exists in the micro crack, and after the film is coated, expansion of the micro crack is facilitated under the heated condition, so that permeation of the permeation detection solution into the micro crack is facilitated.
Further, the upper end fixedly connected with of operation panel carries out the support bracket of bearing to the suppression device, the equal fixedly connected with in upper end both sides of support bracket carries out driven electric telescopic handle to the suppression device, does benefit to the nimble lift of suppression device, and after thermal energy handles a few minutes, the suppression device breaks away from with optical glass sample upper end mutually under electric telescopic handle's promotion, and at this moment, treat that supplementary infiltration glass suitably cools off the back, alright tear supplementary infiltration film.
Further, the suppression device is including being located the pressboard of operation panel top, a plurality of heating blocks are installed to the up end of pressboard, the up end of pressboard covers and has to inlay the heat-conducting layer of locating a plurality of heating block outsides, and the upper end of pressboard installs fixed connection in the flexible heat exchanger who holds of support bracket, utilizes the quick downward conduction of heating temperature to supplementary infiltration film department, does benefit to the quick diffusion infiltration of the infiltration detection solution of film bottom face.
Furthermore, the heat conducting layer is a heat conducting silica gel layer, and a pair of heat insulation blocks corresponding to the telescopic end position of the electric telescopic rod is fixedly connected to the upper end face of the heat insulation cover.
Further, the equal fixed mounting in both ends has sliding guide, two about the pressboard all be connected with on the sliding guide and remove the frame, two remove to rotate between the frame and install the compression roller, one of them sliding guide outer end is installed and is carried out driven motor to the compression roller, sets up rotatable compression roller in the bottom of pressboard, and after the compression roller bottom offseted on supplementary infiltration film, the compression roller was removing rotatory in-process, has further improved the laminating nature between supplementary infiltration film and the optical glass sample.
Further, the equal fixedly connected with guide block in both ends about the heat exchanger separates, all set up the direction chamber that corresponds with two guide block positions respectively on the inner wall of both ends about the support bracket.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is through the method that utilizes the tectorial membrane heating, be favorable to the infiltration of film bottom to a certain extent to detect the rapid diffusion of solution on the optical glass model, there is the crazing line on the optical glass sample that detects, there is gas in the crazing line, behind the tectorial membrane, under the condition of being heated, do benefit to the expansion of crazing line, thereby more do benefit to the infiltration and detect solution and permeate inside the crazing line, for prior art's direct coating method, this method detects fastly, and more effectively improved the directly perceived color development effect of crazing line.
(2) The upper end fixedly connected with of operation panel carries out the support bracket of bearing to the suppression device, and the equal fixedly connected with in upper end both sides of support bracket carries out the electric telescopic handle that drives to the suppression device, does benefit to the nimble lift of suppression device, and after thermal energy handles a few minutes, the suppression device breaks away from with optics glass sample upper end mutually under electric telescopic handle's promotion, and at this moment, treat that supplementary infiltration glass suitably cools off the back, alright tear supplementary infiltration film.
(3) The suppression device is including being located the pressboard of operation panel top, and a plurality of heating blocks are installed to the up end of pressboard, and the upper end face of pressboard covers and has to be inlayed the heat-conducting layer of locating a plurality of heating block outsides, and the upper end of pressboard installs fixed connection in the heat exchanger that holds the bracket and hold in a flexible way, utilizes the quick downward conduction of heating temperature to supplementary infiltration film department, does benefit to the quick diffusion infiltration of the infiltration detection solution of film bottom face.
(4) The equal fixed mounting in both ends has sliding guide about the pressboard, all be connected with on two sliding guide and remove the frame, two remove to rotate between the frame and install the compression roller, one of them sliding guide outer end is installed and is carried out driven motor to the compression roller, sets up rotatable compression roller in the bottom of pressboard, after the compression roller bottom offsets on supplementary infiltration film, the compression roller is removing rotatory in-process, has further improved the laminating nature between supplementary infiltration film and the optical glass sample.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a perspective view of the combination of the table and the pressing device of the present invention;
FIG. 3 is a schematic view of an optical glass sample of the present invention;
FIG. 4 is an internal view of the station of the present invention in combination with a pressing apparatus;
FIG. 5 is a perspective view of the press apparatus of the present invention;
fig. 6 is a perspective view of the junction of the pressing plate and the heating block of the present invention.
The reference numbers in the figures illustrate:
the device comprises an operation table 1, a pressing device 2, a pressing plate 201, a heat conduction layer 202, a heating block 203, a heat insulation cover 204, a sliding guide rail 205, a pressing roller 206, a support bracket 3 and an electric telescopic rod 4.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a method for detecting micro-cracks on an optical glass surface by film coating fluorescence penetration is characterized in that: the detection method comprises the following specific steps:
s1, surface treatment of the detection sample and preparation of the penetration detection solution: selecting a plurality of optical glass samples to be detected, cleaning the surfaces of the optical glass samples, airing the optical glass samples, placing the optical glass samples on an operation table 1 for later use, and preparing a penetration detection solution for later use;
s2, preparation of an auxiliary permeable membrane: uniformly coating the permeation detection solution obtained in the step S2 on a film to obtain an auxiliary permeation film;
s3, film penetration treatment of optical glass: the auxiliary permeable film obtained in the step S2 is laid flat and attached to the optical glass sample in the step S1, and a permeable layer is formed between the auxiliary permeable film and the optical glass sample;
s4, film pressing thermal expansion treatment: pressing the auxiliary permeable film in the step S3 through the pressing device 2 to enable the auxiliary permeable film to be possibly closely attached to the surface of the optical glass sample, and heating the upper end face of the auxiliary permeable film to intensify the osmotic motion of the osmotic detection solution;
s5, fluorescence detection of the optical glass sample: after the optical glass sample is cooled, the penetration detection solution is tightly attached to the cracks, the auxiliary penetration film on the optical glass sample is torn off, the penetration detection solution on the surface of the optical glass sample is removed, the surface of the optical glass sample is irradiated by an ultraviolet lamp in a dark place, and the parts with the cracks can emit bright fluorescence so as to detect.
The preparation method of the permeation detection solution in the S1 comprises the following steps: selecting a fluorescent agent, a dispersing agent and expansive soil in a certain mass ratio, mixing and stirring, wherein the mass ratio of the fluorescent agent to the dispersing agent to the expansive soil is 2:1:0.5, obtaining a penetration detection solution, and adding the fluorescent agent to further improve the color development effect.
And the thermal expansion processing time in the S4 is 5-7min, the heating temperature is 65-90 ℃, and the heating temperature rise processing is utilized, so that the rapid diffusion and permeation of the permeation detection solution are facilitated, and on the other hand, when the detected optical glass sample has microcracks, gas exists in the microcracks, and after the optical glass sample is coated with a film, the expansion of the microcracks is facilitated under the heating condition, so that the permeation detection solution can permeate into the microcracks more conveniently.
In addition, please refer to fig. 2-3, a support bracket 3 for supporting the pressing device 2 is fixedly connected to the upper end of the operating platform 1, and two sides of the upper end of the support bracket 3 are both fixedly connected with electric telescopic rods 4 for driving the pressing device 2, so as to facilitate flexible lifting of the pressing device 2, after thermal expansion treatment for several minutes, the pressing device 2 is separated from the upper end of the optical glass sample under the pushing of the electric telescopic rods 4, at this time, after the auxiliary permeable glass is properly cooled, the auxiliary permeable film can be torn off, and the permeation detection solution at the bottom end of the film permeates into the microcracks.
Referring to fig. 4-6, the pressing device 2 includes a pressing plate 201 located above the operation table 1, the upper end surface of the pressing plate 201 is provided with a plurality of heating blocks 203, the upper end surface of the pressing plate 201 is covered with a heat conduction layer embedded outside the plurality of heating blocks 203, the upper end of the pressing plate 201 is provided with a heat insulation cover 204 fixedly connected to the telescopic end of the support bracket 3, the heat conduction layer 202 is a heat conduction silica gel layer, the upper end surface of the heat insulation cover 204 is fixedly connected with a pair of heat insulation blocks corresponding to the telescopic end position of the electric telescopic rod 4, and the rapid downward conduction of the heating temperature to the auxiliary permeable membrane is utilized to facilitate the rapid diffusion and permeation of the permeation detection solution at the bottom end surface of the membrane.
In addition, the equal fixed mounting in both ends has sliding guide 205 about pressboard 201, all be connected with the removal frame on two sliding guide 205, it installs compression roller 206 to rotate between two removal frames, the motor that drives is installed to one of them sliding guide 205 outer end, set up rotatable compression roller 206 in the bottom of pressboard 201, after compression roller 206 bottom offseted on supplementary infiltration film, compression roller 206 is in removing rotatory in-process, the laminating nature between supplementary infiltration film and the optical glass sample has further been improved, the equal fixedly connected with guide block in both ends about heat exchanger 204, all set up the direction chamber that corresponds with two guide block positions respectively on the both ends inner wall about support frame 3, sliding fit through guide block and direction chamber, easily improve the lift process of suppression device 2 and the steadiness in the course of the work.
The method is favorable for rapid diffusion of the permeation detection solution at the bottom end of the film on the optical glass sample plate to a certain extent by utilizing a film-coating heating method, when the detected optical glass sample has microcracks and gas exists in the microcracks, after film coating, expansion of the microcracks is favorable under the heating condition, so that the permeation detection solution is more favorable for permeating the microcracks, and compared with the direct coating method in the prior art, the method has high detection speed and effectively improves the visual color development effect of the microcracks.
The components present in the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof are known to those skilled in the art through technical manuals or through routine experiments.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.

Claims (4)

1. A film-coated fluorescence penetration detection method for optical glass surface microcracks is characterized in that: the detection method comprises the following specific steps:
s1, surface treatment of the detection sample and preparation of the penetration detection solution: selecting a plurality of optical glass samples to be detected, cleaning the surfaces of the optical glass samples, airing the optical glass samples, placing the optical glass samples on an operation table (1) for later use, and preparing a penetration detection solution for later use;
s2, preparation of an auxiliary permeable membrane: uniformly coating the permeation detection solution obtained in the step S2 on a film to obtain an auxiliary permeation film;
s3, film penetration treatment of optical glass: the auxiliary permeable film obtained in the step S2 is laid flat and attached to the optical glass sample in the step S1, and a permeable layer is formed between the auxiliary permeable film and the optical glass sample;
s4, film pressing thermal expansion treatment: rolling the auxiliary permeable film in the S3 through a pressing device (2) to enable the auxiliary permeable film to be tightly attached to the surface of the optical glass sample, and heating the upper end face of the auxiliary permeable film to intensify the permeation movement of the permeation detection solution;
s5, fluorescence detection of the optical glass sample: after the optical glass sample is cooled, the penetration detection solution is tightly attached to the cracks, the auxiliary penetration film on the optical glass sample is torn off, the penetration detection solution on the surface of the optical glass sample is removed, the surface of the optical glass sample is irradiated by an ultraviolet lamp in a dark place, and bright fluorescence can be emitted at the positions with the cracks, so that detection is carried out;
the preparation method of the permeation detection solution in the S1 comprises the following steps: selecting a fluorescent agent, a diffusant and expansive soil in a certain mass ratio for mixing and stirring, wherein the mass ratio of the fluorescent agent to the diffusant to the expansive soil is 2:1:0.5, obtaining a penetration detection solution, the upper end of an operating platform (1) is fixedly connected with a support bracket (3) for supporting a pressing device (2), both sides of the upper end of the support bracket (3) are fixedly connected with an electric telescopic rod (4) for driving the pressing device (2), the pressing device (2) comprises a pressing plate (201) positioned above the operating platform (1), the upper end face of the pressing plate (201) is provided with a plurality of heating blocks (203), the upper end face of the pressing plate (201) is covered with a heat conduction layer embedded in the outer sides of the heating blocks (203), and the upper end of the pressing plate (201) is provided with a heat insulation cover (204) fixedly connected to the telescopic end of the support bracket (3), the equal fixed mounting in both ends has sliding guide (205), two about pressboard (201) all be connected with on sliding guide (205) and remove the frame, two it installs compression roller (206) to rotate between the frame to remove, one of them sliding guide (205) outer end is installed and is carried out driven motor to compression roller (206).
2. The method for detecting the micro-cracks on the surface of the optical glass in the membrane-covered manner by the fluorescence penetration method according to claim 1, wherein the method comprises the following steps: the thermal expansion treatment time in the S4 is 5-7min, and the heating temperature is 65-90 ℃.
3. The method for detecting the micro-cracks on the surface of the optical glass in the membrane-covered manner by the fluorescence penetration method according to claim 1, wherein the method comprises the following steps: the heat conducting layer (202) is a heat conducting silica gel layer, and a pair of heat insulation blocks corresponding to the telescopic end position of the electric telescopic rod (4) is fixedly connected to the upper end face of the heat insulation cover (204).
4. The method for detecting the micro-cracks on the surface of the optical glass in the membrane-covered manner by the fluorescence penetration method according to claim 1, wherein the method comprises the following steps: the equal fixedly connected with guide block in both ends about separate heat exchanger (204), all set up the direction chamber that corresponds with two guide block positions respectively on the both ends inner wall about support bracket (3).
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