阅读说明：本技术 验证原骨架与新蒙皮胶接前配合质量的方法及其验证工装 (Method for verifying matching quality before gluing original skeleton and new skin and verification tool thereof ) 是由 宋旻键 白树成 蔡良元 王新庆 姜茂川 斯奎 曾安民 范雨娇 朱慧斌 于 2020-12-24 设计创作，主要内容包括：本发明涉及一种验证原骨架与新蒙皮胶接前配合质量的方法及其验证工装,方法包括：在胶接模具上铺放下蒙皮；在下蒙皮上铺放有下校验膜,在下校验膜上铺放有下非金属纱网,压平下非金属纱网无褶皱后用压敏胶带固定于胶接模具上；于下校验膜上铺放原骨架；在原骨架与上蒙皮的胶接区域铺放上非金属纱网；在上非金属纱网上铺放上校验膜,在上校验膜上铺放上蒙皮,完成待重建的蜂窝结构件的模拟组装；将蜂窝结构件整体真空封装放入热压罐内,高温加压一段时间后,打开热压罐取出蜂窝结构件,拆分出下非金属纱网与上非金属纱网；验证下非金属纱网与上非金属纱网上是否具有高辨识度的带纱网纹路来判断配合质量的高低。提高了校验的准确性与可靠性。(The invention relates to a method for verifying the matching quality of an original skeleton and a new skin before gluing and a verification tool thereof, wherein the method comprises the following steps: laying down a skin on the gluing mold; a lower checking film is laid on the lower skin, a lower nonmetal gauze is laid on the lower checking film, and the lower nonmetal gauze is fixed on the gluing mold by a pressure sensitive adhesive tape after being flattened without folds; laying an original skeleton on the lower checking film; laying a non-metal gauze on the bonding area of the original skeleton and the upper skin; laying a check film on the upper nonmetal gauze, laying a skin on the check film, and completing the simulated assembly of the honeycomb structural part to be reconstructed; the honeycomb structural member is integrally packaged in a vacuum mode and placed in a hot pressing tank, after the honeycomb structural member is pressurized at a high temperature for a period of time, the hot pressing tank is opened, the honeycomb structural member is taken out, and a lower nonmetal gauze and an upper nonmetal gauze are split; and verifying whether the lower nonmetal screen and the upper nonmetal screen have a gauze overlapping curve path with high identification degree to judge the matching quality. The accuracy and the reliability of the verification are improved.)

1. Method for verifying the quality of the fit between an original frame and a new skin before gluing, the original frame for reconstructing a honeycomb structure comprising a trailing edge strip (5), a first rib (61), a second rib (62) and a beam (7), the new skin comprising an upper skin (10) and a lower skin (1), characterized in that it comprises:

step S1: laying the lower skin (1) on a gluing mould (100);

step S2: laying a lower check film (2) on a lower skin (1), and marking the mounting positions of the trailing edge strip (5), the first rib (61), the second rib (62) and the beam (7) on the lower check film (2);

step S3: laying a lower non-metal gauze (3) in an area formed by the marked mounting positions, flattening the lower non-metal gauze (3) without folds, and fixing the lower non-metal gauze on the gluing mold (100) by using a pressure sensitive adhesive tape;

step S4: laying a honeycomb core (4), the trailing edge strip (5), the first rib (61), the second rib (62) and the beam (7) in sequence on the lower calibration film (2);

step S5: laying down a non-metallic gauze (8) on the trailing edge strip (5), the first rib (61), the second rib (62) and the gluing area of the beam (7) and the upper skin (10);

step S6: laying an upper check film (9) on the upper nonmetal gauze (8), laying an upper skin (10) on the upper check film (9), and completing the simulated assembly of the honeycomb structural part to be reconstructed;

step S7: the honeycomb structural member is integrally packaged in a vacuum mode and placed in a hot pressing tank, after the honeycomb structural member is pressurized at a high temperature for a period of time, the hot pressing tank is opened, the honeycomb structural member is taken out, and the lower nonmetal gauze (3) and the upper nonmetal gauze (8) are split;

step S8: and verifying whether the lower nonmetal screen (3) and the upper nonmetal screen (8) have a high-identification cross-hatch path with yarns or not, if so, proving that the matching quality of the plate-plate gluing area is high, the quality after gluing is high, and if not, proving that the matching quality of the plate-plate gluing area is low, and the quality after gluing is low.

2. The method for verifying the matching quality of the original skeleton and the new skin before the gluing of the original skeleton and the new skin according to claim 1, wherein the upper non-metal gauze (3) and the lower non-metal gauze (8) are non-metal gauzes made of the same material, and the same material comprises one or more of cotton, nylon and polytetrafluoroethylene.

3. The method for verifying the matching quality of the original skeleton and the new skin before the gluing according to claim 2, wherein the thickness of the upper nonmetal gauze (3) and the thickness of the lower nonmetal gauze (8) are both 0.05mm-0.2mm, and the gauze has a mesh number of 10-60 meshes.

4. The method for verifying the quality of the original skeleton before being glued to the new skin according to claim 1, wherein the upper non-metal gauze (3) and/or the lower non-metal gauze (8) are provided in plurality, the ends of the upper non-metal gauze (3) and/or the lower non-metal gauze (8) are butted with each other, and a seam is formed at the butted part of the upper non-metal gauze (3) and/or the lower non-metal gauze (8), and the seam is fixed by the pressure sensitive adhesive tape.

5. Method for verifying the quality of the fit between the original skeleton and the new skin before gluing according to claim 4, wherein the width of the seam is not more than 5mm, the length of the seam is not more than 5mm, and the distance between the seams of two adjacent upper non-metal gauzes (3) or lower non-metal gauzes (8) is not less than 20 mm.

6. The method for verifying the matching quality of the original skeleton and the new skin before the original skeleton and the new skin are glued together according to claim 5, wherein three fixing points are arranged on each of the upper non-metal gauze (3) and the lower non-metal gauze (8), and the fixing points are compacted by the pressure sensitive adhesive tape after the upper non-metal gauze (3) and the lower non-metal gauze (8) are flattened without folds.

7. A method for verifying the quality of the fit between the original skeleton and the new skin before the gluing thereof according to claim 6, wherein the fixing points are located outside the gluing area.

8. The utility model provides an original skeleton is glued with new covering and is cooperated quality's verification frock, its characterized in that for realizing any one of claim 1-7 verify original skeleton and new covering glue the preceding method of cooperation quality, verify the frock including gluing mould (100), lay in lower covering (1) on gluing mould (100), lay in lower check film (2) on covering (1) down, lay in check film (2) down on original skeleton with honeycomb core (4), lay in last check film (9) on the original skeleton and lay in go up covering (10) of check film (9), original skeleton with be equipped with down nonmetal gauze (3) down between check film (2) down, original skeleton with go up and be equipped with nonmetal gauze (8) between check film (9).

9. The tool for verifying the matching quality of the original skeleton before being glued to a new skin according to claim 8, wherein the lower nonmetal gauze (3) and/or the upper nonmetal gauze (8) are provided with four gauzes, one of the gauzes is as long as the back edge strip (5) and has a width larger than the width of the back edge strip (5), one of the gauzes is as long as the first rib (61) and has a width larger than the width of the first rib (61), one of the gauzes is as long as the second rib (62) and has a width larger than the width of the second rib (62), and one of the gauzes is as long as the beam (7) and has a width larger than the width of the beam (7).

10. The tooling for verifying the fitting quality of the original skeleton before gluing it to the new skin according to claim 9, wherein the four gauzes are arranged along the back edge strip (5), the first rib (61), the second rib (62) and the mounting position of the beam (7) marked on the lower checking film (2), the mounting position being the inner edge line.

Technical Field

The invention relates to the technical field of honeycomb structure gluing, in particular to a method for verifying the matching quality of an original framework and a new skin before gluing and a verification tool thereof.

Background

Aiming at a honeycomb structural member needing to be remanufactured and repaired, in order to ensure the consistency of an interface with an original machine, a remanufacturing and repairing mode is firstly selected to keep a framework connected with a machine body in an old honeycomb structural member, and a skin and a honeycomb core material are newly manufactured; after the cellular structure spare survey and drawing through wasing, keep the skeleton after the dismantlement, reprocess skin (including skin and last skin) and honeycomb core, finally adopt the glued membrane with new skin, new honeycomb and old skeleton (including the back fringe strip, end rib and roof beam) splice the shaping, form one after the refabrication and be equivalent with former cellular structure spare function, the product that the performance promoted, among the cellular structure spare refabrication repair process, for guaranteeing the splice quality of former skeleton and new skin glue joining region, need check before the splice assembly, through the check-up, discover the clearance and the interference of splicing the fitting surface, carry out corresponding compensation again.

In the remanufacturing and repairing process of the honeycomb structural member, an old framework and a new skin are bonded with a new honeycomb; the old framework is inevitably subjected to stress deformation after long-term use, and a damaged repairing area exists in part of the framework, so that the overall dimension of the framework exceeds the tolerance of the process design, and the plate-plate debonding defect is easy to occur in the gluing process; in order to ensure the gluing quality of the old framework and the new skin, the actual deviation of a gluing piece is obtained in the gluing assembly process and then corresponding compensation is carried out, a well-matched gluing surface is formed between the old framework and the new skin through compensation, and a reliable gluing joint can be formed in the subsequent gluing process; for the honeycomb structure manufactured by adopting the vacuum bag-autoclave process, the method of film type verification is generally adopted for obtaining the actual deviation of the glued joint, and the method specifically comprises the following steps: laying a layer of adhesive film for simulating the adhesive bonding process on the adhesive bonding surface, heating and pressurizing, extruding the checking film by the adhesive bonding member, and leaving extruding traces with different depths on the checking film during checking because the matching condition of the adhesive bonding surface influences the extrusion force of the adhesive bonding member on the checking film; in the gluing assembly process, the matching condition of the gluing surface is judged according to the trace of the check film, and corresponding compensation measures are made to ensure the gluing quality. The existing checking method has the following great difference in the information identification degree provided by the checking film for different types of glued joints: for the honeycomb area, the honeycomb area is glued by a plate-core, and because the honeycomb wall is thin and is periodically arranged, the matching surface can be regarded as line-surface matching, and obvious traces can be generated by extrusion, thus a check film with high identification degree can be formed; for the marginal areas of the beam, the rib, the trailing edge strip and the like, the matching surfaces are in surface-to-surface matching, the microscopic layer surfaces can be regarded as a plurality of micro-planes, and obvious traces cannot be generated when the micro-planes extrude the check film clamped in the middle, so that the identification degree of the check film is not high, the matching state of the plate-plate area cannot be accurately reflected, and accurate compensation is difficult to perform according to the condition.

For the conventional gluing, parts are manufactured respectively, the size deviation of the parts can be controlled within the tolerance range of the glued joint surface basically, the area and the number of the parts to be compensated are small after the parts are checked, especially in a plate-plate area, the size deviation of newly manufactured glued joint parts in the area is small, and a checking film with low identification can meet the use requirement; for the remanufactured and repaired honeycomb structural member, the size deviation of the glued joint surface of the plate-plate area is larger due to the deformation and repair of the old framework, and the adoption of a check film with low identification degree is easy to cause under-compensation or over-compensation, so that the debonding risk of the plate-plate area is greatly increased; therefore, for the remanufactured and repaired honeycomb structural member, the existing verification technology cannot effectively ensure the gluing quality of the plate-plate gluing area, and the great debonding risk exists.

Therefore, the inventor provides a matching quality before gluing the original skeleton and the new skin of the reconstructed honeycomb structural member and a verification tool thereof, and the gluing quality of the gluing matching surface of the original skeleton and the new skin of the reconstructed honeycomb structural member is ensured.

Disclosure of Invention

(1) Technical problem to be solved

The embodiment of the invention provides a method for verifying the matching quality of an original skeleton and a new skin before glue joint and a verification tool thereof.

(2) Technical scheme

In a first aspect, an embodiment of the present invention provides a method for verifying the quality of a fitting between an original skeleton and a new skin before gluing, where the original skeleton for reconstructing a honeycomb structural member includes a trailing edge strip, a first rib, a second rib, and a beam, and the new skin includes an upper skin and a lower skin, including step S1: laying the lower skin on a gluing mold; step S2: laying a lower check film on a lower skin, and marking the mounting positions of the trailing edge strip, the first rib, the second rib and the beam on the lower check film; step S3: laying a lower nonmetal gauze in an area formed by the marked mounting positions, and fixing the lower nonmetal gauze on the gluing mold by using a pressure sensitive adhesive tape after the lower nonmetal gauze is flattened and has no wrinkles; step S4: laying a honeycomb core, the trailing edge strip, the first rib, the second rib, and the beam in that order on the lower calibration film; step S5: laying a non-metal gauze on the rear edge strip, the first rib, the second rib and the bonding area of the beam and the upper skin; step S6: laying an upper check film on the upper nonmetal gauze, laying the upper skin on the upper check film, and completing the simulated assembly of the honeycomb structural part to be reconstructed; step S7: the honeycomb structural member is integrally packaged in a vacuum mode and placed in a hot pressing tank, after the honeycomb structural member is pressurized at a high temperature for a period of time, the hot pressing tank is opened, the honeycomb structural member is taken out, and the lower nonmetal gauze and the upper nonmetal gauze are split; step S8: and verifying whether the lower nonmetal screen and the upper nonmetal screen have a high-identification cross-hatch path with yarns or not, if so, verifying the matching quality of the plate-plate gluing area and the quality after gluing, and if not, verifying the matching quality of the plate-plate gluing area and the quality after gluing are low.

Further, the upper nonmetal gauze and the lower nonmetal gauze are nonmetal gauzes made of the same material, and the same material comprises one or more of cotton, nylon and polytetrafluoroethylene.

Furthermore, the thickness of the upper nonmetal gauze and the thickness of the lower nonmetal gauze are both 0.05mm-0.2mm, and the gauze mesh number is 10 meshes-60 meshes.

Further, the upper nonmetal gauze and/or the lower nonmetal gauze are provided with a plurality of yarns, the end parts of the upper nonmetal gauze and/or the lower nonmetal gauze are mutually butted, a seam is formed at the butted part of the upper nonmetal gauze and/or the lower nonmetal gauze, and the seam is fixed by the pressure sensitive adhesive tape.

Further, the width of the seam is not more than 5mm, the length of the seam is not more than 5mm, and the distance between the seams of two adjacent upper nonmetal gauzes or lower nonmetal gauzes is not less than 20 mm.

Furthermore, three fixing points are arranged on each of the upper nonmetal gauze and the lower nonmetal gauze, and the fixing points are compacted by the pressure sensitive adhesive tape after the upper nonmetal gauze and the lower nonmetal gauze are flattened and have no folds.

Further, the fixing point is located outside the gluing zone.

In a second aspect, the embodiment of the invention provides a verification tool for verifying the matching quality of an original skeleton and a new skin before being glued, which is used for realizing a first method for verifying the matching quality of the original skeleton and the new skin before being glued.

Further, the lower nonmetal gauze and/or the upper nonmetal gauze are provided with four gauzes, one gauze is as long as the rear edge strip and is wider than the rear edge strip, one gauze is as long as the first rib and is wider than the first rib, one gauze is as long as the second rib and is wider than the second rib, and one gauze is as long as the beam and is wider than the beam.

Further, the four screens are disposed along the mounting positions of the rear edge strip, the first rib, the second rib, and the beam of the mark on the lower calibration film, the mounting positions being the inner edge lines.

(3) Advantageous effects

In conclusion, the invention respectively lays a layer of non-metal gauze between the original framework of the honeycomb structural member to be reconstructed and the checking parts of the gluing matching surface of the new skin, namely the upper skin and the lower skin, converts the surface-surface extrusion in the existing checking process into the line-surface extrusion, so that the matching surface can obtain the high-identification-degree checking film with the grains of the gauze, thereby judging the gluing quality of the subsequent original framework and the new skin, improving the gluing quality of the original framework and the new skin by compensating the checking film in advance, improving the accuracy and the reliability of the checking, and finally ensuring the gluing quality of the gluing matching surface of the original framework and the new skin of the remanufactured honeycomb structural member.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flow chart of the method for verifying the gluing quality of the invention.

Fig. 2 is a schematic structural diagram of the verification tool of the present invention.

FIG. 3 is a schematic view of the structure of the honeycomb core of the present invention assembled with an upper calibration film.

In the figure:

1-lower skin; 2-lower check film; 3-laying a nonmetal gauze; 4-a honeycomb core; 5-a trailing edge strip; 61-a first rib; 62-a second rib; 7-beam; 8-arranging a non-metal gauze; 9-checking the membrane; 10-upper skin; 100-glue joint mould.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 is a schematic flow chart of a method for verifying the fitting quality of an original skeleton before being glued to a new skin according to an embodiment of the present invention, and as shown in fig. 1, the method includes step S1: laying down the skin 1 on the gluing mold 100; step S2: laying a lower check film 2 on the lower skin 1, and marking the mounting positions of the trailing edge strip 5, the first rib 61, the second rib 62 and the beam 7 on the lower check film 2; step S3: laying a lower nonmetal gauze 3 in the area formed by the marked installation position, and fixing the pressed lower nonmetal gauze 3 on the cementing die 100 by a pressure sensitive adhesive tape (not shown in the figure) after the lower nonmetal gauze 3 is flattened and has no folds; step S4: laying the honeycomb core 4, the trailing edge strip 5, the first rib 61, the second rib 62 and the beam 7 on the lower calibration film 2 in sequence; step S5: laying an upper non-metallic gauze 8 on the back-porch 5, the first ribs 61, the second ribs 62 and the gluing area (not shown) of the beam 7 and the upper skin 10, the upper non-metallic gauze being fixed on the gluing mould 100 by pressure-sensitive adhesive tape (not shown) after being flattened without wrinkles; step S6: laying a check film 9 on the upper nonmetal gauze 8, laying an upper skin 10 on the upper check film 9, and completing the simulated assembly of the honeycomb structural part to be reconstructed; step S7: carrying out vacuum packaging on the simulation assembly whole of the honeycomb structural member to be reconstructed and placing the simulation assembly whole into a hot-pressing tank, opening the hot-pressing tank after pressurizing for a period of time at high temperature, taking out the honeycomb structural member to be reconstructed, and splitting a lower nonmetal gauze 3 and an upper nonmetal gauze 8; step S8: whether the lower nonmetal screen 3 and the upper nonmetal screen 8 have the mesh circuit with the yarn with high identification degree is verified, if so, the matching quality of the plate-plate gluing area (namely the gluing surface of the original framework and the skin) is high, the quality after gluing is high, and if not, the matching quality of the plate-plate gluing area (namely the gluing surface of the original framework and the skin) is low, and the quality after gluing is low.

According to the invention, the non-metal gauze layers are respectively laid between the original skeleton and the new skin, namely the checking parts of the gluing matching surface of the upper skin and the lower skin, and the surface-surface extrusion in the existing checking process is converted into the line-surface extrusion, so that the matching surface can obtain the high-identification-degree checking film with gauze grains, the gluing quality of the subsequent original skeleton and the new skin can be judged, the gluing quality of the original skeleton and the new skin can be improved by compensating the checking film in advance, the checking accuracy and reliability are improved, and the gluing quality of the gluing matching surface of the original skeleton and the new skin of the remanufactured honeycomb structural member is finally ensured.

As a preferred embodiment, as shown in fig. 2, the upper non-metal gauze 3 and the lower non-metal gauze 8 are non-metal gauzes made of the same material, the same material comprises one or more mixtures of cotton, nylon and polytetrafluoroethylene, the cotton, nylon and polytetrafluoroethylene are all high temperature (over 100 ℃) resistant organic matters, the thickness of the upper non-metal gauze 3 and the lower non-metal gauze 8 is 0.05mm-0.2mm, preferably 0.15mm, and the gauze number is 10 meshes-60 meshes, preferably 10 meshes.

As another preferred embodiment, as shown in fig. 2, each of the upper non-metal gauze 3 and/or the lower non-metal gauze 8 has a plurality of upper non-metal gauzes 3 and/or lower non-metal gauzes 8, the ends of each of the upper non-metal gauzes 3 and/or lower non-metal gauzes 8 are butted with each other, a seam is formed at the butted part of the upper non-metal gauze 3 and/or the lower non-metal gauze 8, the seam is fixed by a pressure sensitive adhesive tape (not shown in the figure), the width of the seam is not more than 5mm, the length of the seam is not more than 5mm, and the distance between the seams of two adjacent upper non-metal gauzes.

As other alternative embodiments.

Preferably, as shown in fig. 2, three fixing points (not shown) are provided on each of the upper non-metallic screen 3 and the lower non-metallic screen 8, and the fixing points are compressed by a pressure sensitive adhesive tape (not shown) after the upper non-metallic screen 3 and the lower non-metallic screen 8 are flattened without wrinkles, and the fixing points are located outside the gluing area (not shown). Through set up three fixed point on each non-metallic gauze, the pressure sensitive adhesive tape of being convenient for is fixed after flattening the fold to each non-metallic gauze, improves the precision of pressure sensitive adhesive tape laminating, ensures fixing on the mould that splices that each non-metallic gauze can be stable to improve the accuracy and the reliability of check-up.

The invention also provides a verification tool for the matching quality of the original skeleton and the new skin before being glued, which is used for realizing the method for verifying the matching quality of the original skeleton and the new skin before being glued, and the tool comprises a gluing mould 100, a lower skin 1 laid on the gluing mould 100, a lower check film 2 laid on the lower skin 1, an original skeleton and a honeycomb core 4 laid on the lower check film 2, an upper check film 9 laid on the original skeleton and an upper skin 10 laid on the upper check film 9, wherein a lower nonmetal gauze 3 is arranged between the original skeleton and the lower check film 2, and an upper nonmetal gauze 8 is arranged between the original skeleton and the upper check film 9. A layer of non-metal gauze is respectively laid between the original skeleton and the new skin, namely between the checking parts of the gluing matching surfaces of the upper skin and the lower skin, and the surface-surface extrusion in the existing checking process is converted into the line-surface extrusion, so that the matching surfaces can obtain a high-identification-degree checking film with gauze grains, the gluing quality of the subsequent original skeleton and the new skin can be judged, the gluing quality of the original skeleton and the new skin can be improved by compensating the checking film in advance, and the checking accuracy and reliability are improved.

Preferably, as shown in fig. 2, the lower non-metallic screen 3 and/or the upper non-metallic screen 8 are each provided with four screens, one of which has the same length as the back edge strip 5 and a width greater than the width of the back edge strip 5, one of which has the same length as the first rib 61 and a width greater than the width of the first rib 61, one of which has the same length as the second rib 62 and a width greater than the width of the second rib 62, and one of which has the same length as the beam 7 and a width greater than the width of the beam 7. Specifically, 4 cotton screens are cut, wherein the number of the cotton screens is 10 meshes, the thickness of the cotton screens is 0.15mm, the length of each cotton screen is along the warp direction, the first cotton screen and the rear edge strip are equal in length and the width of each cotton screen exceeds 10-15 mm, the second cotton screen and the first rib are equal in length and the width of each cotton screen exceeds 10-15 mm, the third cotton screen and the second rib are equal in length and the width of each cotton screen exceeds 10-15 mm, and the fourth cotton screen and the beam are equal in length and the width of each cotton screen exceeds 10-15 mm. The corresponding back edge strip, the first rib, the second rib and the beam are covered by the nonmetal gauze, so that the nonmetal gauze is fully filled between the original framework and the upper check film, and the accuracy and the reliability of check are ensured.

Preferably, as shown in fig. 2, four screens are provided along the marked rear edge strip 5 on the lower verification film 2, the first rib 61, the second rib 62, and the mounting position of the beam 7, which is the inner edge line. Specifically, four pieces of gauze were laid along the inner edge line drawn on the lower calibration film, and each gauze was fixed to the bonding mold on the outside with a pressure sensitive adhesive tape having a width of 3mm and a length of 4 mm. Through the mounting position of each subassembly part in the original skeleton of marking in advance on lower check film, guarantee that each non-metallic gauze can be accurate cover on corresponding back fringe strip, first rib, second rib and roof beam, guarantee that non-gold gauze can be accurate be located between original skeleton and the last check film, ensure the accuracy and the reliability of check-up.

It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.

The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.