CN113670171A - 3D curved surface glass cover plate profile tolerance inspection jig and profile tolerance inspection method - Google Patents
3D curved surface glass cover plate profile tolerance inspection jig and profile tolerance inspection method Download PDFInfo
- Publication number
- CN113670171A CN113670171A CN202111153168.2A CN202111153168A CN113670171A CN 113670171 A CN113670171 A CN 113670171A CN 202111153168 A CN202111153168 A CN 202111153168A CN 113670171 A CN113670171 A CN 113670171A
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- cover plate
- curved surface
- glass cover
- surface glass
- profile tolerance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
Abstract
The invention provides a 3D curved surface glass cover plate profile inspection jig applied to the technical field of 3D curved surface glass, and also relates to a 3D curved surface glass cover plate profile inspection method, wherein a left and right movable support rod (2) is arranged between every two transversely adjacent jig support columns (1) of the 3D curved surface glass cover plate profile inspection jig, a middle support rod (3) is arranged between every two longitudinally adjacent jig support columns (1), a plurality of side slide blocks (4) are movably sleeved on each left and right movable support rod (2) according to gaps, a middle slide block (6) is respectively sleeved on each middle slide rod (5), a clamp (7) is arranged on each middle slide block (6), and a measuring meter is arranged on each clamp (7). The inspection precision and efficiency of the profile tolerance of the 3D curved surface glass cover plate are guaranteed, and unqualified products are prevented from being put into the market.
Description
Technical Field
The invention belongs to the technical field of 3D curved glass, and particularly relates to a 3D curved glass cover plate profile tolerance inspection jig and a 3D curved glass cover plate profile tolerance inspection method.
Background
Along with the technical tendency of the 3D curved surface glass cover plate to be mature and stable and the continuous improvement of the requirements of people on the product performance, the requirement of the market on the accuracy of the profile tolerance of the 3D curved surface cover plate is higher and higher. The glass inspection tool among the prior art only has planar 2D's measurement tool, does not have the measurement tool of 3D curved surface apron, can't satisfy the demand that the profile tolerance measured. The existing inspection jig is a 2D plane and cannot adapt to the shape change of a product, so that the profile tolerance of the 3D curved surface cover plate cannot be measured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a simple structure, it is with low costs, can conveniently accurate carry out the location measurement to 3D curved surface glass, quick discernment profile tolerance numerical value has guaranteed the inspection precision and the efficiency of the profile tolerance of 3D curved surface glass apron, avoids unqualified product to put into market, avoids the 3D curved surface glass apron profile tolerance inspection tool of the bad risk of product.
To solve the technical problems, the invention adopts the technical scheme that:
the invention relates to a 3D curved surface glass cover plate profile tolerance inspection jig which comprises a plurality of jig support columns, wherein a left and right movable support rod is arranged between every two transversely adjacent jig support columns, a middle support rod is arranged between every two longitudinally adjacent jig support columns, a plurality of side slide blocks are movably sleeved on each left and right movable support rod according to gaps, a middle slide rod is sleeved between one side slide block of each left and right movable support rod and the other side slide block of the other left and right movable support rod, a middle slide block is sleeved on each middle slide rod, a clamp is arranged on each middle slide block, and a measuring meter is arranged on each clamp.
The middle sliding block of the 3D curved surface glass cover plate profile tolerance inspection jig is provided with a vertical rod which is vertically arranged, and the clamp is sleeved on the vertical rod.
The inspection jig for the profile tolerance of the 3D curved surface glass cover plate further comprises a cover plate profiling jig, and the profile tolerance of the profiling jig is the same as the standard profile tolerance of the 3D curved surface glass cover plate.
The 3D curved surface glass apron profile tolerance inspection tool every tool support column up end set up support piece respectively, set up fastening screw on every support piece respectively, every about movable support pole one end pass a support piece.
The 3D curved surface glass apron profile tolerance inspection tool include four tool support columns, about two activity bracing pieces, two intermediate strut poles.
The inspection jig for the profile tolerance of the 3D curved surface glass cover plate comprises three middle sliding rods, three fixtures and three measuring meters, wherein three side sliding blocks are arranged on each left movable supporting rod and each right movable supporting rod of the inspection jig for the profile tolerance of the 3D curved surface glass cover plate.
The apron profile modeling tool set up to the structure of placing on two intermediate strut poles in the location, the structure that the gauge setting is located apron profile modeling tool top, the table needle of gauge sets up to the structure that can support and lean on apron profile modeling tool upper surface position.
The measuring meter is a dial indicator or a dial indicator.
And a bottom support rod is further arranged between every two transversely adjacent jig support columns of the 3D curved surface glass cover plate profile tolerance inspection jig.
The invention also relates to a 3D curved surface glass cover plate profile degree inspection method which has simple steps and low cost, can conveniently and accurately carry out positioning measurement on the 3D curved surface glass, can quickly identify the profile degree value, ensures the inspection precision and efficiency of the profile degree of the 3D curved surface glass cover plate, avoids unqualified products from being put into the market, and avoids the adverse risk of the products.
The method for inspecting the profile tolerance of the 3D curved glass cover plate comprises the following inspection steps:
s1, combining 3D curved surface glass cover plate profile inspection jigs, adjusting the horizontal and longitudinal horizontal positions of each middle slide block, and adjusting the height position of each clamp;
s2, positioning the cover plate profiling jig on the two middle support rods, enabling a gauge needle of the measuring gauge to abut against the upper surface of the cover plate profiling jig, and resetting the measuring gauge;
s3, placing the 3D curved surface glass cover plate to be inspected into a cover plate profiling jig, enabling each measuring meter to abut against different positions of the 3D curved surface glass cover plate to be inspected, and enabling a numerical value displayed on each measuring meter to be sum data of thickness and deformation of the corresponding position of the 3D curved surface glass cover plate to be inspected;
s4, subtracting the thickness from the sum data of the thickness and the deformation to obtain deformation data;
and S5, obtaining the contour degree value of the 3D curved surface glass cover plate to be detected according to the plurality of deformation data.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
the 3D curved surface glass cover plate profile tolerance inspection jig provided by the invention can meet the inspection requirements of a 2D curved surface glass cover plate and can also meet the inspection requirements of a 3D curved surface glass cover plate, and particularly can embody advantages when being used for inspecting the profile tolerance of the 3D curved surface glass cover plate. Moreover, the inspection of the profile tolerance of the 3D curved surface glass cover plate with different models and sizes can be met by adjusting the positions of the relevant parts of the jig, the universality is strong, the cost is reduced, and the efficiency and the precision are high during the inspection. When the inspection is carried out, the 3D curved surface glass cover plate profile inspection jigs are firstly combined, the horizontal and longitudinal horizontal positions of each middle slide block are adjusted, the height position of each clamp is adjusted, and the jig at the moment is used for inspecting the glass cover plate with a specific model and size; positioning the cover plate profiling jig on the two middle support rods, enabling a gauge needle of the measuring gauge to abut against the upper surface of the cover plate profiling jig, and resetting the measuring gauge, wherein the reference of the side beam to be inspected is formed; placing a 3D curved surface glass cover plate to be inspected into a cover plate profiling jig, wherein each measuring meter abuts against different positions of the 3D curved surface glass cover plate to be inspected, and the numerical value displayed on each measuring meter is the sum data of the thickness and the deformation of the corresponding position of the 3D curved surface glass cover plate to be inspected; subtracting the thickness from the sum data of the thickness and the deformation to obtain deformation data; and obtaining the contour degree numerical value of the 3D curved glass cover plate to be inspected according to the plurality of deformation data. The 3D curved surface glass cover plate contour degree inspection jig ensures the inspection precision of products, effectively saves thousands of times of cost by adding millions of devices in comparison, effectively ensures the rapid production of the 3D curved surface glass cover plate, ensures the rapid adjustment of the process technology, and is suitable for the inspection of products with different models and sizes. The 3D curved surface glass cover plate profile inspection jig and the inspection method are simple in structure, simple in steps and low in cost, can conveniently and accurately perform positioning measurement on 3D curved surface glass, quickly identify the profile numerical value, ensure the inspection precision and efficiency of the profile of the 3D curved surface glass cover plate, avoid unqualified products from being put into the market, and avoid the adverse risk of the products.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic structural diagram of a 3D curved glass cover plate profile inspection jig according to the present invention;
in the drawings, the reference numbers are respectively: 1. a jig supporting column; 2. a left movable supporting rod and a right movable supporting rod; 3. a middle support bar; 4. a side slider; 5. a middle sliding rod; 6. a middle slide block; 7. a clamp; 8. a vertical rod; 9. a support member; 10. a bottom support bar.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:
as shown in the attached drawing 1, the invention relates to a 3D curved surface glass cover plate profile tolerance inspection jig which comprises a plurality of jig support columns 1, wherein a left and right movable support rod 2 is installed between every two transversely adjacent jig support columns 1, a middle support rod 3 is installed between every two longitudinally adjacent jig support columns 1, a plurality of side slide blocks 4 are movably sleeved on each left and right movable support rod 2 according to gaps, a middle slide rod 5 is sleeved between one side slide block 4 of each left and right movable support rod 2 and the other side slide block 4 of the other left and right movable support rod 2, a middle slide block 6 is sleeved on each middle slide rod 5, a clamp 7 is installed on each middle slide block 6, and a measuring meter is installed on each clamp 7. The structure provides a brand-new technical scheme based on unique and ingenious conception aiming at the defects in the prior art. The jig provided by the invention can meet the inspection requirements of a 2D curved glass cover plate and a 3D curved glass cover plate, is particularly used for inspecting the profile tolerance of the 3D curved glass cover plate, and can further embody advantages. Moreover, the inspection of the profile tolerance of the 3D curved surface glass cover plate with different models and sizes can be met by adjusting the positions of the relevant parts of the jig, the universality is strong, the cost is reduced, and the efficiency and the precision are high during the inspection. When the inspection is carried out, the 3D curved surface glass cover plate profile tolerance inspection jigs are firstly combined, the horizontal and longitudinal horizontal positions of each middle slide block 6 are adjusted, the height position of each clamp 7 is adjusted, and the jig at the moment is used for inspecting the glass cover plate with a specific model and size; then the cover plate profiling jig is positioned on the two middle support rods 3, the pointer of the measuring meter abuts against the upper surface of the cover plate profiling jig, the measuring meter is reset, and the reference of the side beam to be tested is formed; placing a 3D curved surface glass cover plate to be inspected into a cover plate profiling jig, wherein each measuring meter abuts against different positions of the 3D curved surface glass cover plate to be inspected, and the numerical value displayed on each measuring meter is the sum data of the thickness and the deformation of the corresponding position of the 3D curved surface glass cover plate to be inspected; subtracting the thickness from the sum data of the thickness and the deformation to obtain deformation data; and obtaining the contour degree numerical value of the 3D curved glass cover plate to be inspected according to the plurality of deformation data. The 3D curved surface glass cover plate contour degree inspection jig ensures the inspection precision of products, effectively saves thousands of times of cost by adding millions of devices in comparison, effectively ensures the rapid production of the 3D curved surface glass cover plate, ensures the rapid adjustment of the process technology, and is suitable for the inspection of products with different models and sizes. The 3D curved surface glass cover plate profile inspection jig and the inspection method have the advantages that the jig is simple in structure, the method steps are simple, the 3D curved surface glass can be conveniently and accurately positioned and measured, the profile numerical value can be rapidly identified, the inspection precision and efficiency of the profile of the 3D curved surface glass cover plate are guaranteed, unqualified products are prevented from being put into the market, and the adverse risk of the products is avoided.
The middle sliding block 6 of the 3D curved surface glass cover plate profile tolerance inspection jig is provided with a vertical rod 8 which is vertically arranged, and the clamp 7 is sleeved on the vertical rod 8. According to the structure, the vertical rod is fixedly arranged on the middle sliding block, the clamp is further provided with the positioning screw rod after being sleeved with the clamp, when the positioning screw rod is loosened, the clamp moves up and down relative to the vertical rod, and when the positioning screw rod is fastened, the clamp is positioned.
The inspection jig for the profile tolerance of the 3D curved surface glass cover plate further comprises a cover plate profiling jig, and the profile tolerance of the profiling jig is the same as the standard profile tolerance of the 3D curved surface glass cover plate. Above-mentioned structure, apron profile modeling tool is for imitating 3D curved surface glass apron preparation of waiting to inspect, and the apron profile modeling tool that the 3D curved surface glass apron preparation of every model and size corresponds, and the whole difference preparation that need not of tool, and only need adjust just to the size of different glass apron during the use. Therefore, the universality of the inspection jig is effectively improved, and various copying jigs do not need to be prepared and stored.
The 3D curved surface glass apron profile tolerance inspection tool 1 up end of every tool support column set up support piece 9 respectively, set up fastening screw 10 on every support piece 9 respectively, every is controlled 2 one end of movable support rod and is passed a support piece 9. Above-mentioned structure, fastening screw realizes the fixed of tool bracing piece and support piece and loosens, ensures to connect reliably to can adjust.
3D curved surface glass apron profile tolerance inspection tool include four tool support columns 1, about two movable support rod 2, two intermediate strut 3. The inspection jig for the profile tolerance of the 3D curved surface glass cover plate is characterized in that three side sliders 4 are arranged on each left movable supporting rod and each right movable supporting rod 2 of the inspection jig for the profile tolerance of the 3D curved surface glass cover plate, and each inspection jig for the profile tolerance of the 3D curved surface glass cover plate comprises three middle sliding rods 6, three clamps 7 and three measuring meters. Above-mentioned structure sets up positioning screw respectively on every side slider, the middle slider to as required, the fixed of inboard side slider of ageing or middle slider with loosen. When fixed, be convenient for carry out the inspection of glass apron, when loosening, be convenient for carry out the regulation of tool.
The apron profile modeling tool set up to the structure of placing on two intermediate strut poles 3 in the location, the gauge outfit sets up the structure that is located apron profile modeling tool top, the gauge needle of gauge outfit sets up to the structure that can support and lean on apron profile modeling tool upper surface position.
The measuring meter is a dial indicator or a dial indicator. A bottom support rod 10 is further installed between every two transversely adjacent jig support columns 1 of the 3D curved surface glass cover plate profile tolerance inspection jig.
The invention also relates to a 3D curved surface glass cover plate profile degree inspection method which has simple steps and low cost, can conveniently and accurately carry out positioning measurement on the 3D curved surface glass, can quickly identify the profile degree value, ensures the inspection precision and efficiency of the profile degree of the 3D curved surface glass cover plate, avoids unqualified products from being put into the market, and avoids the adverse risk of the products.
The method for inspecting the profile tolerance of the 3D curved glass cover plate comprises the following inspection steps:
s1, combining 3D curved surface glass cover plate profile inspection jigs, adjusting the horizontal and longitudinal horizontal positions of each middle slide block 6, and adjusting the height position of each clamp 7; s2, positioning the cover plate profiling jig on the two middle support rods 3, enabling a gauge needle of the measuring gauge to abut against the upper surface of the cover plate profiling jig, and resetting the measuring gauge; s3, placing the 3D curved surface glass cover plate to be inspected into a cover plate profiling jig, enabling each measuring meter to abut against different positions of the 3D curved surface glass cover plate to be inspected, and enabling a numerical value displayed on each measuring meter to be sum data of thickness and deformation of the corresponding position of the 3D curved surface glass cover plate to be inspected; s4, subtracting the thickness from the sum data of the thickness and the deformation to obtain deformation data; and S5, obtaining the contour degree value of the 3D curved surface glass cover plate to be detected according to the plurality of deformation data. Above-mentioned step can be directed against the 3D curved surface glass apron of waiting to examine of different models and not unidimensional, adjusts through the tool, and the inspection of convenient accurate realization profile tolerance. The inspection steps are simple, the workload is low, and the inspection efficiency is effectively improved.
The 3D curved surface glass cover plate profile tolerance inspection jig provided by the invention can meet the inspection requirements of a 2D curved surface glass cover plate and can also meet the inspection requirements of a 3D curved surface glass cover plate, and particularly can embody advantages when being used for inspecting the profile tolerance of the 3D curved surface glass cover plate. Moreover, the inspection of the profile tolerance of the 3D curved surface glass cover plate with different models and sizes can be met by adjusting the positions of the relevant parts of the jig, the universality is strong, the cost is reduced, and the efficiency and the precision are high during the inspection. When the inspection is carried out, the 3D curved surface glass cover plate profile inspection jigs are firstly combined, the horizontal and longitudinal horizontal positions of each middle slide block are adjusted, the height position of each clamp is adjusted, and the jig at the moment is used for inspecting the glass cover plate with a specific model and size; positioning the cover plate profiling jig on the two middle support rods, enabling a gauge needle of the measuring gauge to abut against the upper surface of the cover plate profiling jig, and resetting the measuring gauge, wherein the reference of the side beam to be inspected is formed; placing a 3D curved surface glass cover plate to be inspected into a cover plate profiling jig, wherein each measuring meter abuts against different positions of the 3D curved surface glass cover plate to be inspected, and the numerical value displayed on each measuring meter is the sum data of the thickness and the deformation of the corresponding position of the 3D curved surface glass cover plate to be inspected; subtracting the thickness from the sum data of the thickness and the deformation to obtain deformation data; and obtaining the contour degree numerical value of the 3D curved glass cover plate to be inspected according to the plurality of deformation data. The 3D curved surface glass cover plate contour degree inspection jig ensures the inspection precision of products, effectively saves thousands of times of cost by adding millions of devices in comparison, effectively ensures the rapid production of the 3D curved surface glass cover plate, ensures the rapid adjustment of the process technology, and is suitable for the inspection of products with different models and sizes. The 3D curved surface glass cover plate profile inspection jig and the inspection method are simple in structure, simple in steps and low in cost, can conveniently and accurately perform positioning measurement on 3D curved surface glass, quickly identify the profile numerical value, ensure the inspection precision and efficiency of the profile of the 3D curved surface glass cover plate, avoid unqualified products from being put into the market, and avoid the adverse risk of the products.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a 3D curved surface glass apron profile tolerance inspection tool which characterized in that: including a plurality of tool support columns (1), activity bracing piece (2) about installing between every horizontal adjacent two tool support columns (1), install an intermediate strut pole (3) between every vertical adjacent two tool support columns (1), every is controlled and is gone up according to a plurality of side sliders (4) of clearance activity suit on activity bracing piece (2), slide bar (5) in the middle of the suit between another side slider (4) of activity bracing piece (2) about one side slider (4) of activity bracing piece (2) and another, slide bar (6) in the middle of the suit respectively on every middle slide bar (5), install anchor clamps (7) on every middle slider (6), install a measurement table on every anchor clamps (7).
2. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 1, characterized in that: the profile tolerance inspection jig for the 3D curved surface glass cover plate is characterized in that a vertical rod (8) which is vertically arranged is arranged on a middle sliding block (6), and a clamp (7) is sleeved on the vertical rod (8).
3. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 1 or 2, characterized in that: the inspection jig for the profile tolerance of the 3D curved surface glass cover plate further comprises a cover plate profiling jig, and the profile tolerance of the profiling jig is the same as the standard profile tolerance of the 3D curved surface glass cover plate.
4. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 1 or 2, characterized in that: the profile tolerance inspection jig for the 3D curved surface glass cover plate is characterized in that a support piece (9) is arranged on the upper end face of each jig support column (1), a fastening screw (10) is arranged on each support piece (9), and one end of each left and right movable support rod (2) penetrates through one support piece (9).
5. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 1 or 2, characterized in that: the 3D curved surface glass apron profile tolerance inspection tool include four tool support columns (1), about two activity bracing piece (2), two middle support rod (3).
6. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 5, characterized in that: the inspection jig for the profile tolerance of the 3D curved surface glass cover plate is characterized in that three side sliders (4) are arranged on each left and right movable supporting rod (2), and the inspection jig for the profile tolerance of the 3D curved surface glass cover plate comprises three middle sliding rods (6), three fixtures (7) and three measuring meters.
7. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 3, characterized in that: the apron profile modeling tool set up to the structure of placing on two intermediate strut poles (3) in the location, the structure that the meter setting is located apron profile modeling tool top, the table needle of meter sets up to the structure that can support and lean on apron profile modeling tool upper surface position.
8. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 1 or 2, characterized in that: the measuring meter is a dial indicator or a dial indicator.
9. The 3D curved surface glass cover plate profile tolerance inspection jig of claim 1 or 2, characterized in that: a bottom support rod (10) is further installed between every two transversely adjacent jig support columns (1) of the 3D curved surface glass cover plate profile tolerance inspection jig.
10. The 3D curved surface glass cover plate profile tolerance inspection method is characterized by comprising the following steps of: the method for inspecting the profile tolerance of the 3D curved glass cover plate comprises the following inspection steps:
s1, combining 3D curved surface glass cover plate profile inspection jigs, adjusting the horizontal and longitudinal horizontal positions of each middle sliding block (6), and adjusting the height position of each clamp (7);
s2, positioning the cover plate profiling jig on the two middle support rods (3), enabling a gauge needle of the measuring gauge to abut against the upper surface of the cover plate profiling jig, and resetting the measuring gauge;
s3, placing the 3D curved surface glass cover plate to be inspected into a cover plate profiling jig, enabling each measuring meter to abut against different positions of the 3D curved surface glass cover plate to be inspected, and enabling a numerical value displayed on each measuring meter to be sum data of thickness and deformation of the corresponding position of the 3D curved surface glass cover plate to be inspected;
s4, subtracting the thickness from the sum data of the thickness and the deformation to obtain deformation data;
and S5, obtaining the contour degree value of the 3D curved surface glass cover plate to be detected according to the plurality of deformation data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153168.2A CN113670171A (en) | 2021-09-29 | 2021-09-29 | 3D curved surface glass cover plate profile tolerance inspection jig and profile tolerance inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153168.2A CN113670171A (en) | 2021-09-29 | 2021-09-29 | 3D curved surface glass cover plate profile tolerance inspection jig and profile tolerance inspection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113670171A true CN113670171A (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111153168.2A Pending CN113670171A (en) | 2021-09-29 | 2021-09-29 | 3D curved surface glass cover plate profile tolerance inspection jig and profile tolerance inspection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113670171A (en) |
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2021
- 2021-09-29 CN CN202111153168.2A patent/CN113670171A/en active Pending
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