An expansion coefficient analysis system for low-expansion microcrystalline glass

Abstract

The application relates to the technical field of glass detection, in particular to an expansion coefficient analysis system for low-expansion microcrystalline glass, wherein the first furnace body and the second furnace body are arranged at intervals, and the third furnace body is sleeved on the first furnace body and the second furnace body. A mounting hole is formed in the side wall of the third furnace body, and a laser assembly is arranged in the mounting hole. A window is formed in the side wall of the first furnace body and penetrates the first furnace body. A cover body is arranged outside the third furnace body, a projection screen and a visual assembly are arranged in the cover body. The laser assembly is used for emitting a light beam to the side wall of the end of the push rod close to the sample, so that the light beam passes through the end surface of the push rod and the sample, and is emitted from the side wall of the end of the sample close to the push rod and then is emitted to the window, and finally the light beam is projected to the projection screen. The surface flatness of the sample can be synchronously detected during the detection process, the surface flatness before and after expansion can be detected at the same time, surface defects can be found in time, and the reliability of the detection result can be effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of glass detection, and in particular to an expansion coefficient analysis system for low-expansion microcrystalline glass. Background Art

[0002] In the prior art, push rod dilatometers are often used to test the expansion coefficient of glass. During the test, the sample to be tested needs to be processed into a rod shape and ensure that the sample surface is flat and smooth.

[0003] During actual testing, if the surface of the sample being tested is not flat and smooth but is not discovered in time, it is easy for the probe to have poor contact with the sample due to the roughness or defects on the sample surface, thereby affecting the detection accuracy.

[0004] On the other hand, if the sample surface is rough or has defects (especially the side of the sample that contacts the push rod), after the sample expands due to temperature changes, its roughness and defects will easily be magnified due to volume expansion, further exacerbating the detection error.

[0005] For low-expansion glass-ceramics, although its expansion coefficient is relatively small, if defects on the sample surface are not discovered in time and these defects are accidentally magnified during the expansion process, the error ratio will be easily further amplified due to the low expansion coefficient of the low-expansion glass-ceramics itself.

[0006] In view of this, this application is hereby filed. Summary of the Invention

[0007] The purpose of the present invention is to provide an expansion coefficient analysis system for low-expansion microcrystalline glass, which can synchronously detect the surface flatness of the sample during the detection process, and simultaneously detect the surface flatness before and after expansion, so as to timely discover surface defects and effectively ensure the credibility of the detection results.

[0008] The embodiment of the present invention is achieved as follows:

[0009] A system for analyzing the expansion coefficient of low-expansion microcrystalline glass comprises a temperature-controlled furnace, a push rod, a containing tube, a cover, and a processor.

[0010] The temperature-controlled furnace body includes: a first furnace body, a second furnace body and a third furnace body.

[0011] The first furnace body and the second furnace body are coaxially arranged with an interval, and the third furnace body is sleeved on the first furnace body and the second furnace body at the same time.

[0012] The accommodating tube is coaxially disposed within the first furnace body, and the bottom end of the accommodating tube is sealed by an end plate. A push rod is disposed on the accommodating tube to fit the sample placed within the accommodating tube. The push rod is made of quartz glass.

[0013] A mounting hole is provided on the side wall of the third furnace body, and a laser component is arranged in the mounting hole.

[0014] A window is provided on the side wall of the first furnace body, and the window is closed by a quartz glass plate.

[0015] The cover body is arranged outside the third furnace body, and a projection screen and a visual component are arranged in the cover body.

[0016] The laser assembly is used to emit a light beam toward the side wall of the push rod close to the sample, so that the light beam passes through the push rod and the end face of the sample, and is emitted from the side wall of the sample close to the push rod and then toward the window, and finally the light beam is projected onto the projection screen.

[0017] Wherein, along the circumference of the third furnace body, a plurality of laser assemblies are evenly spaced and arranged. Along the circumference of the first furnace body, a plurality of windows are evenly spaced and arranged.

[0018] The vision component is used to collect the projection of the light beam onto the projection screen.

[0019] If all the projections are located on the same circumference, and the circumference is coaxial with the first furnace body, the processor determines that the end surface of the sample is flat.

[0020] Furthermore, along the axial direction of the temperature-controlled furnace body, the third furnace body is slidably matched with the first furnace body and the second furnace body, and the third furnace body is slidably sealed with the first furnace body and the second furnace body at the same time.

[0021] The cover body is fixedly connected to the third furnace body.

[0022] During the detection process, when the push rod is pushed, the processor is used to control the third furnace body to move synchronously and equidistantly with the push rod.

[0023] Furthermore, the cover body includes: a first annular cover and a second annular cover.

[0024] The first annular cover is arranged outside the third furnace body and is fixedly connected to the third furnace body, and the inner side wall of the first annular cover is spaced apart from the outer side wall of the third furnace body. The first annular cover is provided with a projection opening which penetrates the first annular cover.

[0025] The second annular cover is arranged outside the first annular cover and is fixedly connected to the third furnace body. The inner side wall of the second annular cover is spaced apart from the outer side wall of the first annular cover.

[0026] The projection screen is attached to the outer wall of the first annular cover and is positioned corresponding to the projection opening. The visual component is positioned within the second annular cover and faces the projection screen. The projection screen is light-transmissive, so that the visual component can capture the projection on the projection screen from the side of the projection screen away from the projection opening.

[0027] Furthermore, the outer side wall of the first annular cover has a swing arm, and a notch is formed at the free end of the swing arm to pass through the swing arm, and the projection screen is installed in the notch.

[0028] The swing arm has a first rotation stop point and a second rotation stop point.

[0029] When the swing arm is located at the first rotation dead point, the swing arm is in contact with the outer side wall of the first annular cover, and the projection screen is in contact with the outer side wall of the first annular cover.

[0030] When the swing arm is located at the second rotation dead point, the free end of the swing arm is separated from the outer side wall of the first annular cover, and the projection of the light beam on the projection screen is elongated.

[0031] Furthermore, the mounting hole is closed by a quartz glass column, and the laser assembly is located on a side of the quartz glass column away from the push rod.

[0032] Furthermore, the window extends along the axial direction of the first furnace body.

[0033] The beneficial effects of the technical solutions of the embodiments of the present invention include:

[0034] The expansion coefficient analysis system for low-expansion microcrystalline glass provided by the embodiment of the present invention can synchronously detect the surface flatness of the sample during the detection process, and simultaneously detect the surface flatness before and after expansion, so as to timely discover surface defects and effectively ensure the credibility of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of the overall structure of the expansion coefficient analysis system provided by an embodiment of the present invention (when the swing arm is at the first rotation stop point);

[0037] Figure 2 A schematic diagram of the overall structure of the expansion coefficient analysis system provided by an embodiment of the present invention (after the third furnace body moves synchronously with the push rod);

[0038] Figure 3 A schematic diagram of the overall structure of the expansion coefficient analysis system provided by an embodiment of the present invention (when the swing arm is at the second rotation stop point);

[0039] Figure 4 Schematic diagram of the structure of the swing arm.

[0040] Description of reference numerals:

[0041] First furnace body 100; window 110; second furnace body 200; third furnace body 300; mounting hole 310; laser assembly 320; push rod 400; accommodating tube 500; end plate 510; cover body 600; first annular cover 610; projection port 611; swing arm 612; second annular cover 620; projection screen 710; visual assembly 720. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0045] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] In order to overcome the shortcomings of the existing technology, please refer to Figure 1 This embodiment provides an expansion coefficient analysis system for low-expansion glass-ceramics, which includes a temperature-controlled furnace, a push rod 400, a receiving tube 500, a cover 600, and a processor (not shown in the figure).

[0047] It should be noted that the expansion coefficient analysis system is improved based on the existing push rod 400 type expansion instrument. It can be understood that the expansion coefficient analysis system is also equipped with a temperature control component, a displacement sensor for detecting the displacement of the push rod 400, a calculation module for calculating the expansion coefficient of the sample, etc., which will not be described in detail without application.

[0048] In order to more intuitively introduce the technical solution of the present application, the parts that are the same as the existing push rod 400 type dilatometer will not be described in detail, and only the improved parts will be introduced in detail.

[0049] Compared with the traditional push rod 400 type dilatometer, in the present application, the temperature-controlled furnace body includes: a first furnace body 100 , a second furnace body 200 and a third furnace body 300 .

[0050] The first furnace body 100, the second furnace body 200, and the third furnace body 300 are coaxially arranged, and when in use, the central axes of the first furnace body 100, the second furnace body 200, and the third furnace body 300 are all arranged in a vertical direction. For ease of description and introduction, this application uses the state in which the central axes of the first furnace body 100, the second furnace body 200, and the third furnace body 300 are all arranged in a vertical direction as a reference perspective.

[0051] The first furnace body 100 and the second furnace body 200 are coaxially spaced apart, with the first furnace body 100 located below the second furnace body 200. The bottom of the first furnace body 100 is closed, and the top of the first furnace body 100 is open. The bottom of the second furnace body 200 is open, and the top of the second furnace body 200 is closed.

[0052] The third furnace body 300 is simultaneously sleeved on the first furnace body 100 and the second furnace body 200 , thereby closing the gap between the first furnace body 100 and the second furnace body 200 , so that the temperature-controlled furnace body forms a closed space.

[0053] The accommodating tube 500 is arranged in the first furnace body 100 and the two are coaxially arranged. The bottom end of the accommodating tube 500 is closed by the end plate 510. The accommodating tube 500 and the end plate 510 are both made of quartz glass. The accommodating tube 500 is used to accommodate rod-shaped samples.

[0054] The push rod 400 is positioned above and coaxially with the receiving tube 500 to mate with the sample placed within the tube 500. The push rod 400 is made of quartz glass. It is understood that the push rod 400 is also equipped with a displacement sensor and other related components. The parts that are identical to those of a conventional push rod 400 dilatometer will not be described in detail in this application.

[0055] A circular mounting hole 310 is defined in the sidewall of the third furnace body 300 and is enclosed by a cylindrical quartz glass column. A laser assembly 320 is also positioned within mounting hole 310. This assembly is located on the side of the quartz glass column away from the push rod 400. The laser beam from laser assembly 320 is oriented along the axial direction of the quartz glass column, meaning that the beam emitted by laser assembly 320 is perpendicular to the end face of the quartz glass column.

[0056] In this embodiment, the laser assembly 320 is disposed toward the side where the push rod 400 is located, and the laser assembly 320 is also disposed toward the bottom of the first furnace body 100 .

[0057] A window 110 is formed on the side wall of the first furnace body 100 and passes through the first furnace body 100 . The window 110 is sealed by a quartz glass plate.

[0058] The cover 600 is disposed outside the third furnace body 300 and extends along the axial direction of the temperature-controlled furnace body toward the first furnace body 100. The cover 600 is also disposed outside the first furnace body 100. The outer wall of the first furnace body 100 and the outer wall of the third furnace body 300 are both spaced apart from the inner wall of the cover 600.

[0059] A projection screen 710 and a visual component 720 are disposed in the housing 600 .

[0060] During testing, the end surface of the push rod 400 fits into the end surface of the sample in the accommodating tube 500. The temperature-controlled furnace is used to control the test temperature.

[0061] The laser assembly 320 is used to emit a light beam toward the side wall of the push rod 400 close to the sample. Figure 1 As shown by the dotted line in FIG, the light beam passes through the quartz glass column in mounting hole 310 and then strikes the side wall of push rod 400. After being refracted by push rod 400, the light beam is directed toward the contact surface (end face) between push rod 400 and the sample (glass-ceramic). The light beam then enters the sample through the end faces of both push rod 400 and the sample, and then strikes the side wall of the sample, ultimately exiting through the side wall. The light beam emitted from the sample continues toward window 110 of first furnace body 100, passes through the glass-ceramic plate in window 110, and then exits from window 110 toward projection screen 710 within housing 600, forming a projection on projection screen 710.

[0062] The visual component 720 is used to collect the projection of the light beam on the projection screen 710 .

[0063] Multiple laser assemblies 320 are evenly spaced along the circumference of the third furnace body 300. Correspondingly, multiple windows 110 are evenly spaced along the circumference of the first furnace body 100, and multiple projection screens 710 are evenly spaced along the circumference of the housing 600. Each laser assembly 320 corresponds to one window 110 and one projection screen 710.

[0064] The processor is electrically connected to the visual component 720. The processor is used to evaluate the flatness of the end face of the sample based on the image data obtained by the visual component 720. Specifically, the processor determines whether all the projected position points are located on the same circumference based on the specific position of the projection of the light beam in the image data on the projection screen 710 (in this case, the center point of the projection is used as the projection position point). If all the projected position points are located on the same circumference, and the circumference is coaxial with the first furnace body 100, the processor determines that the flatness of the end face of the current sample is qualified and its end face is flat. In this case, the credibility of the expansion coefficient of the sample obtained by subsequent testing is considered to be qualified. Otherwise, it means that the flatness of the end face of the sample is unqualified. In order to ensure the credibility of the subsequent test data, the end face of the sample needs to be flattened to avoid excessive errors in the test results.

[0065] In general, the expansion coefficient analysis system for low-expansion microcrystalline glass provided in this embodiment can synchronously detect the surface flatness of the sample during the detection process, and simultaneously detect the surface flatness before and after expansion, which can timely discover surface defects and effectively ensure the credibility of the detection results.

[0066] In this embodiment, the third furnace body 300 slides with the first furnace body 100 and the second furnace body 200 along the axial direction of the temperature-controlled furnace body, and the third furnace body 300 is simultaneously slidably sealed with the first furnace body 100 and the second furnace body 200. The third furnace body 300 is driven by a first driver (not shown).

[0067] The cover body 600 is fixedly connected to the third furnace body 300 .

[0068] The window 110 is strip-shaped and extends along the axial direction of the first furnace body 100 .

[0069] During the detection process, when the sample expands and the push rod 400 is pushed, the processor controls the first driver to drive the third furnace body 300 to move synchronously along the direction of the push rod 400 by the same distance according to the displacement value detected by the displacement sensor. Figure 2 shown.

[0070] During this process, the optical path of the light beam at the window 110 of the first furnace body 100 will move along the axial direction of the first furnace body 100, and the light beam can still smoothly pass through the window 110 and ultimately illuminate the projection screen 710. In this way, the flatness of the sample end surface can be continuously tracked and tested during the inspection process, even when the sample has undergone expansion changes.

[0071] If, during the entire testing process, all projected positions are always located on the same circumference, and the circumference is coaxially arranged with the first furnace body 100, it means that the end face of the sample is always flat. This means that the end face of the sample is not only originally flat, but also has a relatively standard linear thermal expansion during the expansion process, and the credibility of the test results is sufficiently guaranteed.

[0072] Furthermore, the cover body 600 includes a first annular cover 610 and a second annular cover 620 .

[0073] The first annular cover 610 is disposed outside the third furnace body 300 and is coaxially fixedly connected to the third furnace body 300. The inner sidewall of the first annular cover 610 is spaced apart from the outer sidewall of the third furnace body 300. The first annular cover 610 extends axially along the temperature-controlled furnace body to the first furnace body 100. The first annular cover 610 defines a projection opening 611 extending therethrough. The projection opening 611 is located on the first furnace body 100.

[0074] The second annular cover 620 is disposed outside the first annular cover 610 and is coaxially fixedly connected to the third furnace body 300 . The inner sidewall of the second annular cover 620 is spaced apart from the outer sidewall of the first annular cover 610 .

[0075] The projection screen 710 is attached to the outer wall of the first annular cover 610 and is disposed corresponding to the projection opening 611 .

[0076] The visual component 720 is disposed within the second annular cover 620 and is disposed toward the projection screen 710. The projection screen 710 is a light-transmitting screen, so that the visual component 720 can obtain the projection on the projection screen 710 from the side of the projection screen 710 away from the projection port 611. In other words, the projection of the laser component 320 on the projection screen 710 can partially penetrate the projection screen 710, so that the projection on the projection screen 710 can be observed on the side of the projection screen 710 away from the projection port 611. The projection screen 710 can be made of light-transmitting cloth, but is not limited thereto. In this case, the projection port 611 can be sealed with a quartz glass plate.

[0077] Optionally, the visual component 720 may be disposed on the outer wall of the first furnace body 100 and facing the projection screen 710 . In this case, the projection opening 611 may not be closed, and the visual component 720 may obtain image data projected on the projection screen 710 through the projection opening 611 .

[0078] Further, please combine Figure 3 and Figure 4 A swing arm 612 is installed on the outer wall of the first annular cover 610. A notch is opened at the free end of the swing arm 612 to pass through it, and the projection screen 710 is installed in the notch.

[0079] In this embodiment, the hinged end of the swing arm 612 is located above the projection opening 611 and spaced apart from the projection opening 611 , and the free end of the swing arm 612 extends to the projection opening 611 .

[0080] The swing arm 612 has a first rotation stop point and a second rotation stop point.

[0081] When the swing arm 612 is located at the first rotation dead point, the swing arm 612 is in contact with the outer wall of the first annular cover 610 , and the projection screen 710 is in contact with the outer wall of the first annular cover 610 .

[0082] When the swing arm 612 is at the second rotational stop point, the free end of the swing arm 612 separates from the outer wall of the first annular cover 610. Since the light beam is directed obliquely downward when passing through the projection opening 611, the separation of the free end of the swing arm 612 from the outer wall of the first annular cover 610 further reduces the angle between the surface of the projection screen 710 and the light beam, thus "stretching" the projection of the light beam on the projection screen 710.

[0083] With this design, since the angle of the swing arm 612 at the second rotation stop point is certain, the irradiation angle of the light beam when it is directed toward the projection screen 710 on the swing arm 612 at the second rotation stop point can be determined based on the projection of the light beam when it is vertically directed toward the projection screen 710 and the projection after being "stretched". Combined with the emission angle of the light beam when it is emitted from the laser assembly 320, it can be further determined whether the end face of the sample remains flat during the detection process (expansion process).

[0084] Among them, using the swing arm 612 to swing and "lengthen" the projection can effectively amplify the size of the projection, improve the accuracy of size recognition of the projected image, and reduce judgment errors.

[0085] To sum up, the expansion coefficient analysis system for low-expansion microcrystalline glass provided by the embodiment of the present invention can synchronously detect the surface flatness of the sample during the detection process, and simultaneously detect the surface flatness before and after expansion, so as to timely discover surface defects and effectively ensure the credibility of the detection results.

[0086] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An expansion coefficient analysis system for low-expansion glass-ceramics, characterized in that: include: Temperature-controlled furnace body, push rod, containing tube, cover body and processor; The temperature-controlled furnace body comprises: a first furnace body, a second furnace body and a third furnace body; The first furnace body and the second furnace body are coaxially spaced apart, and the third furnace body is sleeved on the first furnace body and the second furnace body at the same time; The accommodating tube is disposed in the first furnace body and the two are coaxially arranged, and the bottom end of the accommodating tube is closed by an end plate; the push rod is disposed on the accommodating tube to fit with the sample placed in the accommodating tube; the push rod is made of quartz glass; A mounting hole is provided on the side wall of the third furnace body, and a laser component is arranged in the mounting hole; A window is provided on the side wall of the first furnace body, and the window is sealed by a quartz glass plate; The cover body is arranged outside the third furnace body, and a projection screen and a visual component are arranged inside the cover body; The laser assembly is used to emit a light beam toward the side wall of the push rod close to the sample, so that the light beam passes through the push rod and the end surface of the sample, and is emitted from the side wall of the sample close to the push rod and then toward the window, and finally the light beam is projected onto the projection screen; Wherein, along the circumference of the third furnace body, the plurality of laser assemblies are evenly spaced and arranged; along the circumference of the first furnace body, the plurality of windows are evenly spaced and arranged; The visual component is used to collect the projection of the light beam on the projection screen; If all the projections are located on the same circumference, and the circumference is coaxial with the first furnace body, the processor determines that the end surface of the sample is flat.

2. The expansion coefficient analysis system for low-expansion glass-ceramics according to claim 1, characterized in that: Along the axial direction of the temperature-controlled furnace body, the third furnace body is slidably matched with the first furnace body and the second furnace body, and the third furnace body is simultaneously slidably sealed with the first furnace body and the second furnace body; The cover body is fixedly connected to the third furnace body; During the detection process, when the push rod is pushed, the processor is used to control the third furnace body to move synchronously and equidistantly with the push rod.

3. The expansion coefficient analysis system for low-expansion glass-ceramics according to claim 2, characterized in that: The cover body includes: a first annular cover and a second annular cover; The first annular cover is arranged outside the third furnace body and is fixedly connected to the third furnace body, and the inner side wall of the first annular cover is spaced apart from the outer side wall of the third furnace body; the first annular cover is provided with a projection opening passing through the first annular cover; The second annular cover is arranged outside the first annular cover and is fixedly connected to the third furnace body, and the inner side wall of the second annular cover is spaced apart from the outer side wall of the first annular cover; The projection screen is attached to the outer wall of the first annular cover and is arranged corresponding to the projection port; the visual component is arranged in the second annular cover and is arranged toward the projection screen; the projection screen is a light-transmitting screen, so that the visual component can obtain the projection on the projection screen from the side of the projection screen away from the projection port.

4. The expansion coefficient analysis system for low-expansion glass-ceramics according to claim 3, characterized in that: The outer side wall of the first annular cover has a swing arm, the free end of the swing arm is provided with a notch passing through the swing arm, and the projection screen is installed in the notch; The swing arm has a first rotation stop point and a second rotation stop point; When the swing arm is located at the first rotation stop point, the swing arm is in contact with the outer side wall of the first annular cover, and the projection screen is in contact with the outer side wall of the first annular cover; When the swing arm is located at the second rotation dead point, the free end of the swing arm is separated from the outer side wall of the first annular cover, and the projection of the light beam on the projection screen is elongated.

5. The expansion coefficient analysis system for low-expansion glass-ceramics according to claim 1, characterized in that: The mounting hole is closed by a quartz glass column, and the laser assembly is located on a side of the quartz glass column away from the push rod.

6. The expansion coefficient analysis system for low-expansion glass-ceramics according to claim 1, characterized in that: The window extends along the axial direction of the first furnace body.

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