Stamping method and system for sky screen area of outer plate of automobile top cover

Abstract

The invention relates to a stamping method and system for a sky screen area of an automobile top cover outer plate, and the method comprises the steps: carrying out the drawing forming of the sky screen area of the top cover outer plate, and carrying out the process compensation of a cavity area in the middle of the sky screen area; performing ring cutting and shaping on the shape waste material of the backdrop area, separating the top cover outer plate from the shape waste material, and obtaining a consistent backdrop area trimming contour; shaping the sky screen area to form a shaping material inflow space; and punching is carried out on the sky screen area. According to the method, the drawing forming sufficiency of a product is improved by conducting process compensation on the sky screen area; by annularly cutting the shape waste materials in the sky screen area, it is guaranteed that the parts and the shape waste materials are completely separated and separated by a certain distance to facilitate process transfer, the consistency of flowing-in of shaping materials in the follow-up process is also guaranteed, and a series of quality defects caused by the fact that part of the positions are not trimmed when shaping is conducted in the sky screen area in the traditional technology are avoided; and the product precision can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts stamping, and in particular to a method and system for stamping a canopy area of ​​an automobile roof outer panel. Background Art

[0002] The conventional stamping process of the canopy area of ​​the top cover outer panel parts is mainly achieved through drawing, local trimming and punching, trimming and cutting, flanging and shaping, punching and other process contents. The glass canopy configured for this part is large in size, the part cavity area is large, the part formability is easily insufficient, which will cause the part to be partially concave, and the flange width of the canopy area is large, generally reaching about 25mm, and the coplanarity accuracy of the flange area is 0.3mm, which is difficult to achieve.

[0003] At present, a scheme is adopted when stamping the canopy area of ​​the outer panel of the automobile top cover: the waste material in the middle canopy area of ​​the outer panel of the top cover is separated from the part in two processes, and when the third process is completely separated, the middle flange area is shaped at the same time. Since the shaping content starts first, the trimming edge starts trimming after about 7mm of shaping to separate the waste material, and then the shaping continues to the end. At the beginning of shaping, there is a difference in the inflow conditions of the material at the connection of the unseparated waste material and the material at the trimming point of the previous process, which will cause the material flow at the unseparated part to be blocked, and will be forced to flow in part from the appearance side of the part product, resulting in an uneven appearance of the ridgeline of the canopy area, and the flange coplanarity accuracy of the canopy area does not meet the quality requirements.

[0004] In another solution: the middle skylight area of ​​the top cover outer panel part is not subjected to process compensation, the middle waste is separated from the part through two processes, and when the third process is completely separated, the middle flange area is shaped at the same time. Since no compensation is made in the middle, the part body and the waste are separated first, and then shaping begins, which ensures the consistency of material inflow in the entire flange area. However, no compensation is made for the sunken step drawing process in the skylight area, and all is achieved by shaping in the later process. The part has a large amount of material inflow in this area during the shaping process, which will cause the appearance edges around the skylight to slide downward, causing the risk of local appearance defects. The rebound caused by excessive material inflow is also likely to cause the quality of the parts to fail to meet the standards.

[0005] Therefore, the existing solution is likely to cause the quality accuracy of parts to fail to meet the requirements during implementation, and needs to be improved. Summary of the invention

[0006] The present application provides a method and system for stamping the canopy area of ​​a car roof outer panel, which can solve the problem in the related art that the quality accuracy of the canopy area of ​​the roof outer panel does not meet the standards when the roof outer panel is stamped using the current process.

[0007] In a first aspect, an embodiment of the present application provides a method for stamping a canopy area of ​​an automobile roof outer panel, comprising:

[0008] The canopy area of ​​the top cover outer panel is drawn and formed, and the hollow area in the middle of the canopy area is compensated by process;

[0009] Circular cutting and shaping are performed on the shape waste of the canopy area, the top cover outer plate is separated from the shape waste, and a consistent trimming profile of the canopy area is obtained;

[0010] Shaping the canopy area to form a space for shaping material to flow into;

[0011] Punching holes is performed on the canopy area.

[0012] In combination with the first aspect, in one embodiment, the canopy area of ​​the roof outer panel is drawn and formed, and the hollow area in the middle of the canopy area is compensated by process, and the specific steps include:

[0013] Pre-tension the canopy area of ​​the top cover outer panel;

[0014] A hole shape is set in the hole area in the middle of the skylight area, and process compensation is performed.

[0015] In combination with the first aspect, in one implementation, when performing process compensation, the distance between the waste area of ​​the canopy area and the product development line on the canopy product area of ​​the canopy area is greater than or equal to a first design value.

[0016] In combination with the first aspect, in one implementation, the first design value is 10 mm.

[0017] In combination with the first aspect, in one embodiment, the shaped waste material of the canopy area is circumcised and shaped, the top cover outer plate is separated from the shaped waste material, and a consistent trimming profile of the canopy area is obtained, specifically including:

[0018] Performing circular cutting on the waste material area of ​​the canopy area along the product development line to obtain a consistent trimming contour of the canopy area;

[0019] The shape waste is shaped to separate the roof outer panel canopy area from the shape waste.

[0020] In combination with the first aspect, in one implementation, when the shaped waste is shaped, the shrinkage amount of the shaped waste is greater than or equal to the second design value.

[0021] In combination with the first aspect, in one implementation, the second design value is 5 mm.

[0022] In combination with the first aspect, in one implementation, the consistent trimming profile of the canopy area is as follows: the flange surface areas of the trimming profile of the canopy area have the same coplanarity, and the ridgeline radius of the canopy area has the same appearance.

[0023] In combination with the first aspect, in one implementation, when punching the canopy area, the shaped waste is driven to move along the Z direction of the vehicle coordinate system so that the automobile roof and the shaped waste are separated into layers.

[0024] In the second aspect, an embodiment of the present application provides a stamping system for the canopy area of ​​a car roof outer panel, which includes a first module, a second module, a third module and a fourth module. The first module is used for drawing the canopy area of ​​the roof outer panel and performing process compensation on the hollow area in the middle of the canopy area; the second module is used for circumferential cutting and shaping the shaped waste in the canopy area, separating the roof outer panel from the waste, and obtaining a consistent trimming contour of the canopy area; the third module is used for shaping the canopy area to form a space for the shaped material to flow into; the fourth module is used for punching holes in the canopy area.

[0025] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0026] The embodiment of the present application provides a method and system for stamping the canopy area of ​​an automobile roof outer panel. By performing process compensation on the canopy area, the draw forming adequacy of the product is increased. By performing circular cutting on the shape waste in the canopy area, it is ensured that the parts and the shape waste are completely separated and pulled away by a certain distance to facilitate process transfer, and also ensures the consistency of the inflow of shaping materials in subsequent processes, avoiding a series of quality defects caused by the untrimmed edges of some positions during the shaping of the canopy area in the traditional process, which can improve product precision, facilitate the transfer of parts between processes and the collection of waste at the end of the line, and shape the shape waste so that the contour edge lines around the shape waste are shrunk and the circumference is reduced, avoiding collisions between parts and shape wastes during process transfer due to the small gap between the waste circular cutting and the shape waste, causing appearance defects of the parts. By shaping the canopy area, the quality precision of the product is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A flow chart of a method for stamping a canopy area of ​​an automobile roof outer panel provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of a hollow area of ​​an outer panel of a car roof provided in an embodiment of the present application;

[0030] Figure 3A schematic diagram of waste boundary lines and product development lines provided in an embodiment of the present application;

[0031] Figure 4 for Figure 3 Sectional view at AA;

[0032] Figure 5 for Figure 4 A partial enlarged view of the middle part;

[0033] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0034] Figure 7 A schematic diagram of the canopy area shaping structure provided in an embodiment of the present application;

[0035] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0036] Fig. 9 for Figure 7 Sectional view at the middle BB;

[0037] Fig.10 for Fig. 9 A partial enlarged view of point D in the middle;

[0038] Fig.11 for Fig. 9 A partial enlarged view of point E in the middle;

[0039] Fig.12 A schematic diagram of the layers of a car roof and waste provided in an embodiment of the present application;

[0040] Fig.13 for Fig.12 Sectional view at CC.

[0041] In the figure: 1. Top cover outer panel; 2. Cavity area; 3. Shape waste before shaping; 4. Shape waste after shaping. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The embodiment of the present application provides a method and system for stamping the canopy area of ​​a car roof outer panel, which can solve the problem in the related art that the quality accuracy of the canopy area of ​​the roof outer panel does not meet the standards when the current process is used to stamp the roof outer panel.

[0044] The car roof skylight is usually called a car skylight or a panoramic skylight. It is a large transparent glass installed on the roof of the car. It does not have an opening function, so it is often called a fixed skylight. Compared with the openable panoramic skylight, the main characteristics of the skylight are its fixity and light transmittance. It cannot be opened by pressing buttons, etc., but it can provide sufficient light and vision for the car. However, the hollow area 2 in the middle of the skylight area on the outer panel of the car roof can also be made into a skylight. The difference between the skylight and the skylight is that the skylight can be opened and closed, while the skylight cannot be opened and is fully enclosed. However, whether it is a skylight or a skylight, the middle part of the outer panel of the car roof needs to be cut to form a middle hollow area 2 domain, and then the glass is installed. And how to recycle this part of the material in the middle hollow area 2 domain has the same demand for panoramic sunroofs and panoramic skylights. Therefore, in the present application, the skylight area of ​​the automobile roof outer panel mentioned should be understood in a broad sense, that is, the skylight area of ​​the automobile roof outer panel 1 does not only refer to the skylight, but excludes the skylight, and should be understood to include the skylight and the skylight.

[0045] See also Figures 1 to 13 In a first aspect, an embodiment of the present application provides a method for stamping a canopy area of ​​an automobile roof outer panel, which comprises:

[0046] 101: drawing the canopy area of ​​the top cover outer panel 1, and performing process compensation on the hollow area 2 in the middle of the canopy area;

[0047] 102: performing circular cutting and shaping on the shape waste material of the canopy area, separating the top cover outer panel 1 from the shape waste material, and obtaining a consistent trimming profile of the canopy area;

[0048] 103: shaping the canopy area to form a shaping material that flows into the space;

[0049] 104: Punching holes in the canopy area.

[0050] In the present application, the canopy area of ​​the top cover outer panel 1 is first drawn and formed, and the hollow area 2 in the middle of the canopy area is processed for compensation. Then, the shape waste of the canopy area is ring-cut and shaped, the top cover outer panel 1 is separated from the shape waste, and a consistent trimming contour of the canopy area is obtained. Then, the canopy area is shaped to form a space for the shaped material to flow into, and finally, the canopy area is punched. By making process compensation for the canopy area, the drawing forming adequacy of the product is increased; by performing circular cutting on the shape waste in the canopy area, it is ensured that the parts and the waste are completely separated and kept at a certain distance to facilitate process transfer, and also ensure the consistency of the inflow of shaping materials in subsequent processes, avoiding a series of quality defects caused by the untrimmed edges of some parts during shaping in the canopy area in traditional processes, which can improve product precision, facilitate the transfer of parts between processes and the collection of waste at the end of the line, and shape the shape waste so that the contour edge lines around the shape waste are shrunk and the circumference is reduced, avoiding collisions between parts and shape wastes during process transfer due to the small gap between the circular cutting without waste and the shape waste, causing appearance defects of the parts; by shaping the canopy area, the quality precision of the product is further improved.

[0051] In step 101, the canopy area of ​​the roof outer panel 1 is drawn and formed, and the hollow area 2 in the middle of the canopy area is compensated by process. The specific steps include steps 1011 to 1012:

[0052] See also Figure 2 As shown, the skylight area mainly includes two parts, namely, an installation area and a waste area. The installation area will form the installation position of the glass skylight through subsequent shaping, and after the waste area is cut, a hollow area 2 is formed on the semi-finished top cover outer panel 1 part, and the cut material is recycled.

[0053] Step 1011: pre-tensioning the canopy area of ​​the top cover outer panel 1.

[0054] First, the canopy area of ​​the top cover outer panel 1 is pre-stretched and the drawing processability is ensured. The parts made by the drawing process have higher dimensional accuracy and lower surface roughness. During the drawing process, part of the material first flows into the canopy area to avoid insufficient material inflow in the subsequent shaping process.

[0055] Step 1012: setting a cavity shape in the cavity area 2 in the middle of the skylight area and performing process compensation.

[0056] Before pre-stretching the canopy area, the shape of the cavity needs to be designed in advance, so that after pre-stretching the canopy area of ​​the top cover outer panel 1, process compensation can be performed on the drawing shape of the middle cavity area 2, and the errors generated during assembly or processing can be partially offset by additional adjustment or processing of the reserved margin, thereby achieving the required accuracy and facilitating full drawing.

[0057] Among them, when performing process compensation, the distance between the waste area of ​​the canopy area and the product unfolding line on the canopy product area of ​​the canopy area is greater than or equal to the first design value. In this embodiment, the first design value is set to 10mm. It should be noted that the first design value is not fixed. In other embodiments, it can be adjusted as needed. In this embodiment, the distance between the waste area of ​​the canopy area and the product unfolding line on the canopy product area of ​​the canopy area is set to be greater than or equal to 10mm, which can ensure that the cutting edge of the subsequent process has sufficient strength and avoid affecting the cutting edge strength due to the supplementary shape.

[0058] On the basis of the above-mentioned embodiment, in this embodiment, the shape waste of the canopy area is circumcised and shaped, the top cover outer panel 1 is separated from the waste, and a consistent trimming profile of the canopy area is obtained, specifically including steps 1020 to 1021:

[0059] Step 1020: performing circular cutting on the waste area of ​​the canopy area along the product unfolding line to obtain a consistent trimming contour of the canopy area.

[0060] For details, see Figure 3 As shown, along the circumference of the glass canopy area, the shaped waste in the waste area is completely cut to form a consistent canopy area trimming profile in the circumference of the canopy area. The consistent canopy area trimming profile here means that the flange surface area of ​​the canopy area trimming profile has the same coplanarity and the canopy area appearance ridgeline radius has the same radius. Since the shaped waste in the waste area is completely cut, the shaped waste is also complete, which is convenient for subsequent collection. Figure 3 In the figure, X1 represents the tangent line, and X2 represents the boundary line of the waste shape after shaping.

[0061] Step 1021: Shape the shaped waste material to separate the canopy area of ​​the top cover outer panel 1 from the shaped waste material.

[0062] After step 1020 is completed, the shape waste is not completely separated from the canopy area, so the shape waste needs to be reshaped, see Figure 5 and Figure 6 As shown, Figure 5 and Figure 6 The middle dotted line is the shape of the waste after the waste ring cutting before 3 shape waste shaping. There is zero distance between the top cover outer panel 1 part and the shape waste. If the shape waste is not shaped, it is easy to cause bumps and deformation to the part contour of the skylight area during the process transfer; after the shape waste shaping 4, the shrinkage of the shape waste contour is reduced, and the top cover outer panel 1 part and the shape waste are separated by a certain distance, which avoids the bumps of the top cover outer panel 1 part during the process transfer and ensures the quality of the top cover outer panel 1 part.

[0063] In this embodiment, when the shaped waste is shaped, the shrinkage of the shaped waste is greater than or equal to the second design value. The second design value is set to 5mm to ensure that there is enough safety margin during the process transfer to avoid the top cover outer panel 1 part and the shaped waste from colliding and causing appearance quality problems.

[0064] On the basis of the above embodiment, in this embodiment, in step 103: shaping the canopy area so that the shaping material flows into the space, specifically:

[0065] Since the shape waste has been completely separated from the canopy area in step 102, the shape waste is circularly cut to make the trimming contour of the canopy area consistent. Figures 7 to 11 As shown, when the canopy area is shaped in this process, consistent shaping material inflow conditions are obtained from the complete trimming contour, forming a consistent shaping material inflow space. In the process of drawing and shaping of the automobile roof, the material inflow space is a key factor, which directly affects the forming quality and production efficiency of the roof. Consistent material inflow space can ensure that the process parameters of the roof outer panel 1 are consistent during the drawing process, and can optimize the forming quality and production efficiency of the roof outer panel 1. It avoids the inconsistent shaping material inflow caused by the traditional process of simultaneously performing trimming and trimming at some positions in this process, resulting in the problem of substandard coplanarity of the flange surface area in the canopy area and uneven rounded corners of the appearance of the canopy area. At the same time, by shaping the canopy area, the distance between the roof outer panel 1 and the shaped waste is further increased.

[0066] exist Figure 8 In , X4 is the complete and consistent trimming contour of the skylight area, and X3 is the trimming contour edge of the skylight area obtained after shaping. Fig.10 and Fig.11 In the figure, Y1 represents the pre-tensioned shape of the canopy area, and Y2 represents the shape of the canopy area after shaping. It can be seen intuitively that the rounded corners of the ridges and corners of the canopy area are adjusted during shaping.

[0067] On the basis of the above embodiment, in this embodiment, in step 104: punching holes in the canopy area, specifically:

[0068] The positioning holes are punched on the middle canopy mounting table. When punching the canopy area, the transfer end picker between the third process and the fourth process drives the shaped waste to move along the Z direction of the vehicle coordinate system, so that the automobile roof outer panel 1 and the shaped waste are separated. In this embodiment, along the Z direction of the vehicle coordinate system, the Z-direction height position of the shaped waste in the canopy area is adjusted downward by a set value. In this embodiment, the set value can be 15mm. The automobile roof outer panel 1 and the shaped waste are separated. See Fig.13 As shown, Fig.13In the figure, Z1 is the height position of the shaped waste before adjustment, and Z2 is the height position of the shaped waste after adjustment. When the end-of-line robot transfers the automobile top cover outer panel 1 and the shaped waste to the belt conveyor, it ensures that the shaped waste falls on the belt conveyor first, and then the automobile top cover outer panel 1 falls on the belt conveyor, and the automobile top cover outer panel 1 and the shaped waste are managed in layers to avoid collision between the automobile top cover outer panel 1 at the end of the line and the shaped waste, and can also better collect the automobile top cover outer panel 1 and the shaped waste separately.

[0069] It should be noted that after the canopy area is shaped to form a space for the shaped material to flow into, the Z-direction height position of the shaped waste in the canopy area can also be adjusted downward by a set value, and in step 104, the shaped waste and the automobile roof outer panel 1 are transported separately. Among them, since the process in step 104 is simple, it is preferred to adjust the Z-direction height position of the shaped waste in the canopy area downward by a set value when punching the canopy area.

[0070] In summary, in the process, through the sophisticated process design of the top cover outer panel 1 part, the consistency of the material flow in the canopy area of ​​the top cover outer panel 1 and the quality accuracy of the top cover outer panel 1 are guaranteed, and the excess and usable waste in the middle canopy area is obtained. Specifically, in the first process, the canopy area adds shape process compensation to increase the adequacy of the part's drawing forming. In the second process, the shape waste in the waste area is circumcised and shaped to ensure that the top cover outer panel 1 is separated from the shape waste and a certain distance is pulled away to facilitate process transfer, and to facilitate the consistency of the shaping material flow in the canopy area in the third process; in the third process, the canopy area is shaped to achieve the required part quality accuracy; in the fourth process, through process transfer and structural design, the shape waste in the canopy area is reduced by 15mm to ensure that the shape waste and the top cover outer panel 1 are layered at the end of the part line to avoid collisions around the parts. Through the reasonable arrangement of a series of process contents, good coplanarity accuracy of the flange surface in the canopy area and usable waste line tail collection are obtained. In addition, in the trimming process, the intermediate shape waste in the canopy area is cut in a circular manner to separate the waste from the canopy area, thereby obtaining a trimming contour of the canopy area where the open material flows in unobstructed, thereby ensuring the consistency of the flow of shaped materials in the canopy area, and avoiding a series of quality defects caused by the failure to trim some positions during the shaping of the canopy area in the traditional process; and the periphery of the shaped waste is shaped to shrink the contour edge line of the shaped waste and reduce the circumference, thereby avoiding the collision between the top cover outer panel 1 and the shaped waste due to the small gap between the waste cutting and the shaped waste during the process transfer, thereby causing appearance defects of the parts.

[0071] In the second aspect, an embodiment of the present application provides a stamping system for the canopy area of ​​a car roof outer panel, comprising: a first module, a second module, a third module and a fourth module, the first module being used for drawing the canopy area of ​​the roof outer panel 1 and performing process compensation on the hollow area 2 in the middle of the canopy area; the second module being used for circumferential cutting and shaping the shaped waste in the canopy area, separating the roof outer panel 1 from the waste, and obtaining a consistent trimming contour of the canopy area; the third module being used for shaping the canopy area to form a space for the shaped material to flow into; and the fourth module being used for punching holes in the canopy area.

[0072] In the present application, by performing process compensation on the canopy area, the drawing forming adequacy of the product is increased; by performing circular cutting on the shaped waste in the canopy area, it is ensured that the parts and the waste are completely separated and pulled away at a certain distance to facilitate process transfer, and also ensure the consistency of the inflow of the shaping material in the subsequent process, avoiding a series of quality defects caused by the untrimmed edges of some positions during shaping in the canopy area in the traditional process, which can improve the product precision, and is beneficial to the transfer of parts between processes and the collection of waste at the end of the line, and the shaped waste is shaped so that the contour edge lines around the waste are shrunk and the circumference is reduced, avoiding the collision between the parts and the shaped waste during the process transfer due to the small gap between the waste circular cutting and the shaped waste, causing the appearance defects of the parts; by shaping the canopy area, the quality precision of the product is further improved.

[0073] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0074] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0075] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for stamping the canopy area of ​​an automobile roof outer panel, characterized in that: It includes: The canopy area of ​​the top cover outer panel (1) is drawn and formed, and a hollow area (2) in the middle of the canopy area is processed for compensation; The shaped waste material of the canopy area is circularly cut and shaped, the top cover outer plate (1) is separated from the shaped waste material, and a consistent trimming profile of the canopy area is obtained; Shaping the canopy area to form a space for shaping materials to flow into; Punching holes is performed on the canopy area.

2. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 1, characterized in that: The canopy area of ​​the top cover outer panel (1) is drawn and formed, and the hollow area (2) in the middle of the canopy area is subjected to process compensation. The specific steps include: Pre-tensioning the canopy area of ​​the top cover outer panel (1); A cavity shape is set in the cavity area (2) in the middle of the skylight area, and process compensation is performed.

3. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 2, characterized in that: When performing process compensation, the distance between the waste area of ​​the canopy area and the product development line on the canopy product area of ​​the canopy area is greater than or equal to the first design value.

4. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 3, characterized in that: The first design value is 10 mm.

5. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 1, characterized in that: The shape waste material of the canopy area is circularly cut and shaped, the top cover outer plate (1) is separated from the shape waste material, and a consistent trimming profile of the canopy area is obtained, which specifically includes: Performing circular cutting on the waste material area of ​​the canopy area along the product development line to obtain a consistent trimming contour of the canopy area; The shaped waste is shaped so that the canopy area of ​​the top cover outer panel (1) is separated from the shaped waste.

6. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 5, characterized in that: When the shaped waste is shaped, the shrinkage amount of the shaped waste is greater than or equal to the second design value.

7. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 6, characterized in that: The second design value is 5 mm.

8. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 1, characterized in that: The consistent trimming contour of the canopy area is as follows: the flange surface areas of the trimming contour of the canopy area have the same coplanarity, and the ridgeline radius of the canopy area has the same appearance.

9. The method for stamping the canopy area of ​​the automobile roof outer panel according to claim 1, characterized in that: When punching the canopy area, the shaped waste is driven to move along the Z direction of the vehicle coordinate system so that the automobile roof (1) and the shaped waste are separated into layers.

10. A stamping system for the outer panel canopy area of ​​a car roof (1), characterized in that: It includes: The first module is used for drawing the canopy area of ​​the roof outer panel (1) and performing process compensation on the hollow area (2) in the middle of the canopy area; The second module is used to perform circumcision and shaping on the shaped waste material of the canopy area, separate the top cover outer plate (1) from the waste material, and obtain a consistent trimming profile of the canopy area; The third module is used to shape the canopy area so that the shaping material flows into the space; The fourth module is used for punching holes in the canopy area.

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