Membrane, pre-buckling tool and edge rolling tool

Abstract

The embodiment of the utility model relates to the technical field of vehicle production, and discloses a tire mold, a pre-buckling tool and an edge rolling tool. The tire mold is used for a pre-buckling tool or an edge rolling tool, the pre-buckling tool or the edge rolling tool is used for installing and debugging an engine hood outer plate, a positioning hole is formed in the engine hood outer plate, and the tire mold comprises a casting body suitable for being connected with the engine hood outer plate; and the positioning pin is arranged on one side of the casting body in the thickness direction and is suitable for being matched with the positioning hole. According to the tire mold, the size of the tire mold can be conveniently adjusted to be matched with the size of the engine hood outer plate, the debugging quality is improved, the size matching accuracy of the tire mold and the engine hood outer plate is improved, and the debugging period is shortened.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle production technology, and in particular to a tire membrane, a pre-fastening tool, and a roller edge tool. Background Art

[0002] The current mainstream tire membrane uses a "profile + edge" method for positioning the outer panel. Typically, the outer panel profile is flat (such as the hood outer panel), and edge positioning has limited accuracy. Consequently, the tire membrane suffers from inaccurate positioning during the pre-attachment and roll-edge processes, resulting in stress-induced shifting. Especially during tooling installation and commissioning, inaccurate positioning can affect the dimensional accuracy of parts after pre-attachment or roll-edge processing, leading to dimensional mismatches between the tire membrane and the hood outer panel. This can lead to extremely unstable pre-attachment and roll-edge processes, severely impacting commissioning quality and cycle times. Summary of the Invention

[0003] In view of this, an embodiment of the present application provides a fetal membrane, which not only improves the debugging quality but also shortens the debugging cycle.

[0004] An embodiment of the present application also provides a pre-fastening tool, including the above-mentioned fetal membrane.

[0005] An embodiment of the present application also provides a roller edge tooling, including the above-mentioned fetal membrane.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides a fetal membrane for a pre-snap tool or a roller edge tool, wherein the pre-snap tool or the roller edge tool is used to install and debug the engine hood outer panel, and the engine hood outer panel has a positioning hole. The fetal membrane includes: a casting body, which is suitable for connection with the engine hood outer panel; a positioning pin, which is provided on one side of the casting body in the thickness direction and is suitable for cooperating with the positioning hole.

[0008] The tire membrane provided in the embodiment of the present application improves the positioning accuracy and stability between the casting body and the engine hood outer panel by providing a positioning hole in the engine hood outer panel and arranging a positioning pin on one side of the casting body in the thickness direction and adapted to cooperate with the positioning hole. This improves the positioning accuracy and stability between the casting body and the engine hood outer panel, and improves the positioning accuracy and stability between the tire membrane and the engine hood outer panel. This facilitates the adjustment of the tire membrane size to match the size of the engine hood outer panel, thereby improving not only the debugging quality but also the dimensional matching accuracy between the tire membrane and the engine hood outer panel and shortening the debugging cycle. In one possible implementation of the present application, the positioning pins are multiple and spaced apart.

[0009] In a possible implementation of the present application, the positioning pin is detachably connected to the casting body.

[0010] In a possible implementation of the present application, the casting body has a mounting seat, the mounting seat has a mounting hole, and the positioning pin is suitable for being arranged in the mounting hole.

[0011] In a possible implementation of the present application, the height of the positioning pin is 35-40 mm; and / or the diameter of the positioning pin 3 is 10-20 mm.

[0012] In a possible implementation of the present application, when the hood outer panel is mounted to the tire membrane, the end of the locating pin facing away from the casting body protrudes from the end surface of the hood outer panel facing away from the casting body.

[0013] In a possible implementation of the present application, when the hood outer panel is mounted to the tire membrane, the distance between the end of the locating pin facing away from the casting body and the end face of the hood outer panel facing away from the casting body is 5-10 mm.

[0014] In a possible implementation of the present application, the diaphragm further includes: a positioning block, which is provided on the outer peripheral wall of the casting body, and the positioning block extends in the direction from the casting body to the positioning pin and protrudes from the surface of the casting body; and / or, the diaphragm further includes: a conformal part, which is provided on the side of the casting body facing the positioning pin, and the conformal part is suitable for abutting against the engine hood outer panel; and / or, the diaphragm further includes: a suction cup, which is provided on the side of the casting body facing the positioning pin, for adsorbing the engine hood outer panel; and / or, the diaphragm further includes: a sensor, which is provided on the side of the casting body facing the positioning pin, for detecting that the engine hood outer panel is installed in place.

[0015] In a second aspect, an embodiment of the present application provides a pre-fastening tool, comprising the above-mentioned fetal membrane.

[0016] The pre-clipped tooling provided in the embodiment of the present application, by setting the above-mentioned fetal membrane, sets a positioning hole on the outer panel of the engine hood, and sets the positioning pin on one side of the thickness direction of the casting body and is suitable for cooperating with the positioning hole, thereby improving the positioning accuracy and stability between the casting body and the outer panel of the engine hood, improving the positioning accuracy and stability between the fetal membrane and the outer panel of the engine hood, facilitating the adjustment of the size of the fetal membrane to match the size of the outer panel of the engine hood, not only improving the debugging quality, but also improving the size matching accuracy of the fetal membrane and the outer panel of the engine hood, and shortening the debugging cycle.

[0017] In a third aspect, an embodiment of the present application provides a roller edge tooling comprising the above-mentioned fetal membrane.

[0018] The roller edge tooling provided in the embodiment of the present application, by setting the above-mentioned tire membrane, sets a positioning hole on the engine hood outer panel, and sets the positioning pin on one side of the thickness direction of the casting body and is suitable for cooperating with the positioning hole, thereby improving the positioning accuracy and stability between the casting body and the engine hood outer panel, improving the positioning accuracy and stability between the tire membrane and the engine hood outer panel, facilitating the adjustment of the size of the tire membrane to match the size of the engine hood outer panel, not only improving the debugging quality, but also improving the size matching accuracy of the tire membrane and the engine hood outer panel, and shortening the debugging cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of the fetal membrane provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the assembly of the tire membrane and the engine hood outer panel provided in an embodiment of the present application;

[0021] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.

[0022] Reference numerals:

[0023] 10. fetal membrane;

[0024] 1. Casting body; 11. Reinforcement ribs;

[0025] 2. Surface;

[0026] 3. Positioning pin;

[0027] 4. Positioning block;

[0028] 5. Symbol-shaped parts;

[0029] 6. Suction cup;

[0030] 7. Mounting seat;

[0031] 8. Sensor;

[0032] 20. Engine hood outer panel; 201. Positioning hole. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0034] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0035] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0036] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0037] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0038] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0039] Reference below Figure 1-Figure 3 The fetal membrane 10 provided in an embodiment of the present application is described.

[0040] First, as Figure 1-Figure 3 As shown, an embodiment of the present application provides a fetal membrane 10, comprising: a casting body 1 and a positioning pin 3.

[0041] Specifically, refer to Figure 1-Figure 3The tire membrane 10 is used for a pre-fastening tool or a roller edge tool, which is used to install and debug the engine hood outer panel 20. The engine hood outer panel 20 has a positioning hole 201 (for example, through a pre-punching process), and the casting body 1 is suitable for connecting with the engine hood outer panel 20; the positioning pin 3 is provided on one side of the casting body 1 in the thickness direction and is suitable for matching with the positioning hole 201;

[0042] It should be noted that during the manufacturing process of the door cover assembly, a pre-attachment fixture or a roller edge fixture is used to assemble the hood outer panel 20 with other components (such as the inner panel, support structure, etc.) to form a complete door cover structure. The hood outer panel 20 can be positioned by the tire membrane 10 in the pre-attachment fixture or the roller edge fixture, thereby improving production efficiency and ensuring the quality and accuracy of the assembly between the hood outer panel 20 and other components.

[0043] Among them, the casting body 1 is suitable for connecting with the engine hood outer panel 20, so that the engine hood outer panel 20 can be initially positioned with the tire membrane 10. The casting body 1 has an annular profile 2 on one side in the thickness direction, which is connected with the engine hood outer panel 20 through the profile 2. The shape of the engine hood outer panel 20 can be consistent with the profile 2 of the tire membrane 10, thereby facilitating the positioning of the engine hood outer panel 20 with the tire membrane 10.

[0044] In addition, before the tire membrane 10 is mass-produced, the tire membrane 10 and the engine hood outer panel 20 need to be adjusted so that the size of the tire membrane 10 can accurately match the size of the engine hood outer panel 20.

[0045] It is understandable that during the commissioning phase of the diaphragm 10 , if the positioning between the diaphragm 10 and the hood outer panel 20 is inaccurate or unstable, deviations may occur in the dimensional fit between the diaphragm 10 and the hood outer panel 20 .

[0046] In the present application, during the debugging stage of the diaphragm 10, the positioning pin 3 is arranged on one side of the thickness direction of the casting body 1 and is suitable for cooperating with the positioning hole 201. The positioning pin 3 is connected to the casting body 1, and the engine hood outer panel 20 is suitable for being arranged on the side of the casting body 1 facing the positioning pin 3, thereby improving the positioning accuracy and stability between the casting body 1 and the engine hood outer panel 20, and further improving the positioning accuracy and stability between the diaphragm 10 and the engine hood outer panel 20, making it easier for the diaphragm 10 to adjust its size to match the size of the engine hood outer panel 20, which not only improves the debugging quality, but also improves the size matching accuracy of the diaphragm 10 and the engine hood outer panel 20, and shortens the debugging cycle.

[0047] The tire membrane 10 provided in the embodiment of the present application improves the positioning accuracy and stability between the casting body 1 and the engine hood outer panel 20 by setting a positioning hole 201 on the engine hood outer panel 20, and setting the positioning pin 3 on one side of the thickness direction of the casting body 1 and suitable for cooperating with the positioning hole 201, thereby improving the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20, and further improving the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20, making it convenient for the tire membrane 10 to adjust its size to match the size of the engine hood outer panel 20, not only improving the debugging quality, but also improving the size matching accuracy of the tire membrane 10 and the engine hood outer panel 20, and shortening the debugging cycle.

[0048] In a possible implementation of the present application, Figure 1 As shown, the positioning pins 3 are multiple and spaced apart. This further improves the positioning accuracy and stability between the casting body 1 and the hood outer panel 20, and the positioning accuracy and stability between the tire membrane 10 and the hood outer panel 20, making it easier to adjust the size of the tire membrane 10 to match the size of the hood outer panel 20. This not only improves the debugging quality, but also increases the dimensional matching accuracy of the tire membrane 10 and the hood outer panel 20, and shortens the debugging cycle.

[0049] For example, Figure 1 In the example shown, there are two positioning pins 3 spaced apart along the length direction of the casting body 1, but the present application is not limited thereto, and there may be more positioning pins 3, such as 3, 4, 5, or 6. Furthermore, there may also be multiple positioning pins 3 spaced apart along the width direction of the casting body 1.

[0050] In one possible implementation of the present application, the locating pins 3 are detachably connected to the casting body 1. Thus, after the hood outer panel 20 is debugged and installed on the tire membrane 10, the locating pins 3 can be removed, thereby facilitating the disassembly of the hood outer panel 20 from the tire membrane 10.

[0051] In a possible implementation of the present application, Figure 1 As shown, the casting body 1 has a plurality of reinforcing ribs 11 on the side facing the locating pin 3. The plurality of reinforcing ribs 11 are adapted to be arranged at intervals along the circumferential direction of the locating pin 3. It is understood that the plurality of reinforcing ribs 11 are arranged at intervals along the circumferential direction of the locating pin 3, and a limiting space is formed between the plurality of reinforcing ribs 11. The locating pin 3 is adapted to be located in the limiting space, thereby limiting the locating pin 3, thereby further improving the positioning accuracy and stability between the casting body 1 and the engine hood outer panel 20, and thus improving the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20.

[0052] Furthermore, if Figure 1As shown, part of the reinforcing ribs 11 extends in the length direction of the casting body 1, and part of the reinforcing ribs 11 extends in the width direction of the casting body 1, thereby preventing the positioning pin 3 from moving in the width and length directions of the casting body 1. At the same time, the positioning pin 3 is movable in the thickness direction of the casting body 1, thereby realizing that the positioning pin 3 is detachably arranged on the casting body 1.

[0053] In a possible implementation of the present application, Figure 1 As shown, the casting body 1 has a mounting seat 7, which has a mounting hole, and the positioning pin 3 is suitable for being installed in the mounting hole. It can be understood that the installation of the mounting seat 7 facilitates the positioning and installation of the positioning pin 3 on the casting body 1. At the same time, the mounting seat 7 can fix the positioning pin 3, ensuring the positioning reliability of the positioning pin 3.

[0054] In a possible implementation of the present application, Figure 2 and Figure 3 As shown, the height of the positioning pin 3 is 35-40 mm. For example, 35 mm, 36 mm, 38 mm, or 40 mm, etc., thereby ensuring that the positioning pin 3 has an appropriate height. On the one hand, it prevents the positioning pin 3 from being too short, allowing the positioning pin 3 to be smoothly inserted into the positioning hole 201, and at the same time prevents the positioning pin 3 from being separated from the positioning hole 201, thereby ensuring the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20. On the other hand, it prevents the positioning pin 3 from being too long, thereby saving the material used for the positioning pin 3 and saving costs.

[0055] In a possible implementation of the present application, the diameter of the positioning pin 3 is 10-20 mm, for example, 10 mm, 12 mm, 15 mm, or 20 mm. Thus, the positioning pin 3 has an appropriate diameter. On the one hand, the positioning pin 3 has a sufficient diameter, thereby ensuring the structural strength of the positioning pin 3 and the positioning reliability of the positioning pin 3. On the other hand, the positioning pin 3 is prevented from having an excessively large diameter, thereby facilitating the economy and lightweight of the positioning pin 3.

[0056] In a possible implementation of the present application, Figure 2 and Figure 3 As shown, when the hood outer panel 20 is mounted on the tire membrane 10, the end of the positioning pin 3 facing away from the casting body 1 protrudes from the end surface of the hood outer panel 20 facing away from the casting body 1. This prevents the positioning pin 3 from being disengaged from the positioning hole 201, thereby further ensuring the positioning accuracy and stability between the tire membrane 10 and the hood outer panel 20.

[0057] In a possible implementation of the present application, Figure 2 and Figure 3As shown, when the hood outer panel 20 is mounted to the tire membrane 10, the distance between the end of the locating pin 3 facing away from the casting body 1 and the end surface of the hood outer panel 20 facing away from the casting body 1 is 5-10 mm, for example 5 mm, 6 mm, 8 mm or 10 mm.

[0058] Thus, the positioning pin 3 has an appropriate height. On the one hand, it can prevent the positioning pin 3 from being too short, allowing the positioning pin 3 to be smoothly inserted into the positioning hole 201, while also preventing the positioning pin 3 from being separated from the positioning hole 201, thereby ensuring the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20. On the other hand, it can prevent the positioning pin 3 from being too long, thereby saving the material used for the positioning pin 3 and saving costs.

[0059] In a possible implementation of the present application, Figure 1 As shown, the fetal membrane 10 further includes: a positioning block 4, which is provided on the outer peripheral wall of the casting body 1, and extends from the casting body 1 to the positioning pin 3 and protrudes from the surface of the casting body 1 (i.e., the molding surface 2);

[0060] It can be understood that, by extending the positioning block 4 along the direction of the casting body 1 to the positioning pin 3 and protruding from the surface of the casting body 1, when the engine hood outer panel 20 and the tire membrane 10 are installed, the positioning block 4 can be arranged on the radial outside of the engine hood outer panel 20, thereby playing a role in limiting the engine hood outer panel 20, preventing the engine hood outer panel 20 from moving in the radial direction, and further improving the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20.

[0061] Furthermore, if Figure 1 As shown, the positioning blocks 4 are multiple and spaced apart along the circumferential direction of the casting body 1, thereby further playing a role in limiting the engine hood outer panel 20, preventing the engine hood outer panel 20 from moving in the radial direction, and further improving the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20.

[0062] In a possible implementation of the present application, Figure 1 As shown, the diaphragm 10 further includes: a conformal piece 5 , which is provided on a side of the casting body 1 facing the positioning pin 3 , and is suitable for abutting against the engine hood outer panel 20 .

[0063] It is understood that the shaped member 5 may be made of polyurethane and can achieve precise positioning of the hood outer panel 20 by matching with corresponding features (such as holes, grooves, flanges, etc.) on the hood outer panel 20. These features are designed and manufactured with the actual size and shape of the hood outer panel 20 in mind to ensure accurate and repeatable positioning.

[0064] The profile 5 helps guide the correct position of the hood outer panel 20 relative to the tire membrane 10, ensuring alignment during the pre-snap or roll-edge processes, which is crucial for the subsequent fastening process. During the pre-snap or roll-edge processes, the hood outer panel 20 may be subjected to significant pressure. The profile 5, through its design, distributes this pressure, reducing damage to the hood outer panel 20 and protecting the component from deformation or damage.

[0065] In a possible implementation of the present application, Figure 1 As shown, the diaphragm 10 also includes: a suction cup 6 is provided on the side of the casting body 1 facing the positioning pin 3, for adsorbing the engine hood outer panel 20; thereby, the positioning and installation reliability and stability of the engine hood outer panel 20 and the casting body 1 are improved, thereby further improving the positioning and installation reliability and stability of the engine hood outer panel 20 and the diaphragm 10.

[0066] Furthermore, if Figure 1 As shown, the suction cups 6 are multiple and spaced apart, thereby further improving the reliability and stability of positioning and installation of the hood outer panel 20 and the casting body 1, thereby further improving the reliability and stability of positioning and installation of the hood outer panel 20 and the tire membrane 10.

[0067] For example, Figure 1 In the example shown, there are 11 suction cups 6 , but the present application is not limited thereto. The number of first suction cups 6 may also be other numbers, such as 2, 5, 10 or 12.

[0068] In a possible implementation of the present application, Figure 1 As shown, the tire membrane 10 further includes a sensor 8, which is disposed on the side of the casting body 1 facing the positioning pin 3 and is used to detect whether the hood outer panel 20 is installed in place. It will be understood that by using the sensor 8 to detect whether the hood outer panel 20 is installed in place, it can not only ensure that the hood outer panel 20 and the tire membrane 10 are properly installed, but also prevent the hood outer panel 20 and the tire membrane 10 from being squeezed by excessive installation, thereby preventing damage to the hood outer panel 20 and the tire membrane 10 during installation.

[0069] The following describes the pre-fastening tooling provided according to an embodiment of the present application.

[0070] In a second aspect, an embodiment of the present application provides a pre-fastening tool, comprising the above-mentioned fetal membrane 10.

[0071] The pre-clamping tool provided in the embodiment of the present application, by setting the above-mentioned fetal membrane 10, sets a positioning hole 201 on the engine hood outer panel 20, and sets the positioning pin 3 on one side of the thickness direction of the casting body 1 and is suitable for cooperating with the positioning hole 201, thereby improving the positioning accuracy and stability between the casting body 1 and the engine hood outer panel 20, improving the positioning accuracy and stability between the fetal membrane 10 and the engine hood outer panel 20, facilitating the fetal membrane 10 to adjust its size to match the size of the engine hood outer panel 20, not only improving the debugging quality, but also improving the size matching accuracy of the fetal membrane 10 and the engine hood outer panel 20, and shortening the debugging cycle.

[0072] The following describes the roller edge tooling provided according to an embodiment of the present application.

[0073] In a second aspect, an embodiment of the present application provides a roller edge tooling, comprising the above-mentioned fetal membrane 10.

[0074] The roller edge tooling provided in the embodiment of the present application, by setting the above-mentioned tire membrane 10, sets a positioning hole 201 on the engine hood outer panel 20, and sets the positioning pin 3 on one side of the thickness direction of the casting body 1 and is suitable for cooperating with the positioning hole 201, thereby improving the positioning accuracy and stability between the casting body 1 and the engine hood outer panel 20, improving the positioning accuracy and stability between the tire membrane 10 and the engine hood outer panel 20, facilitating the tire membrane 10 to adjust its size to match the size of the engine hood outer panel 20, not only improving the debugging quality, but also improving the size matching accuracy of the tire membrane 10 and the engine hood outer panel 20, and shortening the debugging cycle.

[0075] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A fetal membrane, characterized in that Used for a pre-buttoning tool or a roller edge tool, the pre-buttoning tool or the roller edge tool is used to install and debug the engine hood outer panel, the engine hood outer panel has a positioning hole, and the tire membrane includes: a casting body, the casting body being adapted to be connected to the engine hood outer panel; A positioning pin is provided on one side of the casting body in a thickness direction and is suitable for cooperating with the positioning hole.

2. The fetal membrane according to claim 1, characterized in that The positioning pins are multiple and spaced apart from each other.

3. The fetal membrane according to claim 1, characterized in that The positioning pin is detachably connected to the casting body.

4. The fetal membrane according to claim 1, wherein The casting body is provided with a mounting seat, the mounting seat is provided with a mounting hole, and the positioning pin is suitable for being arranged in the mounting hole.

5. The fetal membrane according to claim 1, wherein The height of the positioning pin is 35-40 mm; And / or, the diameter of the positioning pin is 10-20 mm.

6. The fetal membrane according to claim 1, characterized in that When the hood outer panel is mounted to the tire membrane, the end of the positioning pin facing away from the casting body protrudes from the end surface of the hood outer panel facing away from the casting body.

7. The fetal membrane according to claim 6, characterized in that When the hood outer panel is mounted on the tire membrane, the distance between the end of the positioning pin facing away from the casting body and the end surface of the hood outer panel facing away from the casting body is 5-10 mm.

8. The fetal membrane according to claim 1, wherein Also includes: a positioning block, the positioning block being provided on the outer peripheral wall of the casting body, the positioning block extending in a direction from the casting body to the positioning pin and protruding from the surface of the casting body; And / or, further comprising: a conformal piece, the conformal piece being provided on a side of the casting body facing the positioning pin, the conformal piece being adapted to abut against the engine hood outer panel; And / or, further comprising: a suction cup, the suction cup being provided on a side of the casting body facing the positioning pin, for adsorbing the engine hood outer panel; And / or, it further includes: a sensor, which is arranged on a side of the casting body facing the positioning pin and is used to detect whether the engine hood outer panel is installed in place.

9. A pre-buttoning tool, characterized in that: Comprising the fetal membrane according to any one of claims 1-8.

10. A roller edge tool, characterized in that: Comprising the fetal membrane according to any one of claims 1-8.

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