Mold and method for forming a side outer panel with a flange surface at a corner of a roof and a rear window

Abstract

The application provides a forming die and forming method for a product flange surface type side wall outer plate at a corner of a roof and a rear window, and belongs to the field of forming dies. The forming die comprises an upper die main pressing plate and an upper die body which are slidably connected through a No.1 guide plate, and a No.1 nitrogen spring provides power for the upper die main pressing plate and the upper die body; an upper die side turn-up sliding block and the upper die body are slidably connected through a No.4 guide plate, and the upper die side turn-up sliding block and a lower die body are slidably connected through a No.2 guide plate, and a No.2 nitrogen spring provides power for the upper die side turn-up sliding block; a filling wedge moves under the action of a driving wedge, a lower die small pressing plate and the filling wedge of the lower die are slidably connected through a No.3 guide plate, and a No.4 nitrogen spring provides power for the lower die small pressing plate. The side turn-up process designed in the application separates the lower die small pressing plate at the corner of the roof and the rear window, changes the traditional turn-up form into a pressing turn-up, and solves the forming problem of the serious wrinkle of the side turn-up of the flange surface type side wall outer plate.

Description

Technical Field

[0001] This invention belongs to the field of molding dies, and in particular relates to a molding die and molding method for a product with a flange-type side panel at the corner of the top cover and the rear windshield. Background Technology

[0002] In automotive exterior body panels, the side panel is one of the most critical components, boasting the largest structural dimensions among all body panels. The side panel's geometry is complex. To achieve the intended product shape and ensure the forming quality of the product during each stamping process, it is necessary to study the forming method for the flanged side panel at the corner of the roof and rear window, thus solving the problem of severe wrinkling at the side flange.

[0003] The side panels of most passenger cars, particularly the roof and rear window corners, typically employ a side-flanging process. Because this is a corner area, the outer edge of the product is longer than the inner edge, resulting in excess material during the side-flanging process and ultimately causing wrinkling. To solve this problem, the flanging height at the corner needs to be as short as possible to minimize excess material and keep wrinkling within an acceptable range. This is why the flanging surface in this area of ​​passenger car side panels is generally short. However, due to vehicle structural requirements, additional welding components must be added to complete the flanging surface, increasing customer costs and significantly increasing the likelihood of roof leaks. Summary of the Invention

[0004] In view of this, the present invention aims to provide a molding method for the flanged side panel of the product at the corner of the top cover and the rear windshield, so as to solve the molding problem of severe wrinkling of the side flange.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a molding die for a product with a flanged side panel at the corner of the top cover and rear windshield, comprising an upper die body, an upper die main pressure plate, an upper die side flange slider, an upper die side flange small pressure plate, a lower die body, a lower die filling wedge, a lower die small pressure plate, and a lower die driving wedge; wherein the upper die main pressure plate and the upper die body are slidably connected via a first guide plate, and a first nitrogen spring is mounted on the upper die body with mounting screws to provide power to the upper die main pressure plate; the upper die side flange slider is slidably connected to the upper die body via a fourth guide plate, and connected to the lower die body via a second guide plate. The sliding action is performed, and the movement of the small pressure plate on the upper mold side flange is controlled by the action of nitrogen spring No. 3. Nitrogen spring No. 3 is installed on the upper mold side flange slider by mounting screws to provide power to the small pressure plate on the upper mold side flange. The filling wedge and the driving wedge are slidably connected by guide plate. The filling wedge and the lower mold body are slidably connected by guide plate. The driving wedge moves under the action of cylinder, causing the filling wedge to move on the lower mold body. The small pressure plate of the lower mold and the filling wedge of the lower mold are slidably connected by guide plate No. 3. Nitrogen spring No. 4 is installed on the filling wedge by mounting screws to provide power to the small pressure plate of the lower mold.

[0006] Furthermore, the No. 1 nitrogen spring is mounted on the upper mold body via mounting screws to provide power to the upper mold side flange slider.

[0007] Furthermore, the second nitrogen spring is mounted on the upper mold body via mounting screws to provide power to the upper mold main pressure plate.

[0008] Furthermore, the No. 3 nitrogen spring is mounted on the upper die side flange slider via mounting screws, providing power to the small pressure plate of the upper die side flange.

[0009] Furthermore, the No. 4 nitrogen spring is mounted on the filling wedge with mounting screws to provide power to the lower die small pressure plate.

[0010] Furthermore, the fourth nitrogen spring is a nitrogen spring with controllable stroke and a locking function.

[0011] Furthermore, a limiter is installed on the lower mold body.

[0012] The method for forming the flanged side panel at the corner of the top cover and rear windshield includes the following steps:

[0013] (1) When the mold is working, the lower mold filling wedge has reached the working position under the action of the lower mold driving wedge, and the lower mold small pressure plate is released under the action of the fourth nitrogen spring; the upper mold main pressure plate is released under the action of the first nitrogen spring, the upper mold side flange slider is released under the action of the second nitrogen spring, and the upper mold side flange small pressure plate is released under the action of the third nitrogen spring;

[0014] (2) The mold starts to work. The upper mold body, the upper mold main pressure plate and the upper mold side flange slider move downward together under the action of the slider on the press until the upper mold main pressure plate contacts the lower mold filling wedge. Then it continues to move downward until the stroke of the first nitrogen spring is fully compressed, and the pressing process of the upper mold main pressure plate is completed.

[0015] (3) The upper mold side-flanging slider, along with the upper mold side-flanging small pressure plate and the upper mold body, continues to move downward under the action of the slider on the press until the upper mold side-flanging small pressure plate contacts the lower mold filling wedge, and continues to move downward until the stroke of the No. 3 nitrogen spring is fully compressed, and the pressing process of the upper mold side-flanging small pressure plate is completed.

[0016] (4) The upper mold body continues to move downward under the action of the slider on the press. After contacting the lower mold small pressure plate, all the pressing process is completed and the flanging process begins.

[0017] (5) The process continues until the upper mold body contacts the limiter on the lower mold body. The limiter is installed on the lower mold body with mounting screws. The upper mold body reaches the bottom dead center, and the flanging process ends.

[0018] Compared with the prior art, the advantages of the molding die and molding method for the flange-type side panel at the corner of the top cover and rear windshield of the present invention are:

[0019] (1) The present invention adopts the process of adding a lower pressure plate on the filling wedge. In the molding process, a small pressure plate of the lower mold is added at the corner of the top cover and the rear windshield to press the material, which enhances the constraint on the sheet material and controls the speed at which the outer sheet material flows to the flange area. This constraint solves the wrinkling problem of the flanged outer panel of the product at the corner of the top cover and the rear windshield, and solves the molding problem of severe wrinkling of the flanged outer panel at this location.

[0020] (2) The side-flipping process designed in this invention separates the lower mold small pressure plate at the corner of the top cover and the rear windshield, changing the traditional flipping form into a pressure-pressed flipping, solving the problem of severe wrinkling of the side-flipping at this point, reducing the number of welded parts, reducing customer costs, and greatly reducing the probability of water leakage from the top cover.

[0021] (3) The product with flange-type side panel forming mold at the corner of the top cover and rear windshield described in this invention has a side flanging process that separates the lower mold small pressure plate at the corner of the top cover and rear windshield, changing the traditional flanging form into a pressure plate flanging, thus solving the forming problem of severe wrinkling of the side flanging at this location. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the product structure at the corner of the rear windshield without a flanged top cover as described in the prior art of this invention.

[0024] Figure 2 This is a schematic diagram of the product structure of the flanged top cover and the rear window corner as described in this invention;

[0025] Figure 3 This is a schematic diagram of the molding process of the outer side panel at the corner of the rear windshield without a flange, as described in the prior art of this invention.

[0026] Figure 4 This is a schematic diagram of the molding process of the side panel of the side panel with flanged top cover and the side panel at the corner of the rear windshield, as described in this invention.

[0027] Figure 5 This is a cross-sectional structural diagram of the molding die for the flange-type side panel of the product at the corner of the top cover and rear windshield as described in this invention.

[0028] In the diagram: 1-Upper mold body, 2-Upper mold main pressure plate, 3-Upper mold side flange slider, 4-Upper mold side flange small pressure plate, 5-Lower mold body, 6-Lower mold filling wedge, 7-Lower mold small pressure plate, 8-Lower mold driving wedge, 9-Guide plate No. 1, 10-Nitrogen spring, 11-Guide plate No. 2, 12-Nitrogen spring No. 2, 13-Nitrogen spring No. 3, 14-Guide plate No. 3, 15-Nitrogen spring No. 4, 16-Limiter, 17-Guide plate No. 4. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0030] I. Detailed Implementation Method 1, see [link / reference] Figure 1-5This embodiment describes a molding die for a flanged side panel at the corner of the roof and rear window, comprising an upper die body 1, an upper die main pressure plate 2, an upper die side flange slider 3, an upper die side flange small pressure plate 4, a lower die body 5, a lower die filling wedge 6, a lower die small pressure plate 7, and a lower die driving wedge 8; wherein the upper die main pressure plate 2 and the upper die body 1 are movably connected by a guide plate 9, and a nitrogen spring 10 provides power to them; the upper die side flange slider 3 and the upper die... The main body 1 is slidably connected to the lower mold body 5 via the fourth guide plate 17, and slidably connected to the lower mold body 5 via the second guide plate 11. The second nitrogen spring 12 provides power for it, and at the same time, the movement of the upper mold side flange small pressure plate 4 is controlled by the third nitrogen spring 13. The lower mold filling wedge 6 moves under the action of the lower mold driving wedge 8. The lower mold small pressure plate 7 and the lower mold filling wedge 6 are slidably connected via the third guide plate 14, and the fourth nitrogen spring 15 provides power for the lower mold small pressure plate 7.

[0031] The first nitrogen spring 10 is mounted on the upper mold body 1 by mounting screws to provide power to the upper mold side flange slider 3.

[0032] The second nitrogen spring 12 is mounted on the upper mold body 1 by mounting screws, providing power to the upper mold main pressure plate 2.

[0033] Nitrogen spring 13 is mounted on the upper mold side flange slider 3 by mounting screws, providing power to the upper mold side flange small pressure plate 4.

[0034] Nitrogen spring 15 is mounted on the lower die filling wedge 6 by mounting screws, providing a power source for the lower die small pressure plate 7.

[0035] The fourth nitrogen spring 15 is a nitrogen spring with controllable stroke and a locking function; otherwise, it cannot be implemented.

[0036] A limiter 16 is installed on the lower mold body 5.

[0037] The method for forming the flanged side panel at the corner of the top cover and rear windshield includes the following steps:

[0038] (1) When the mold is working, the lower mold filling wedge 6 has reached the working position under the action of the lower mold driving wedge 8, and the lower mold small pressure plate 7 is released under the action of the fourth nitrogen spring 15; the upper mold main pressure plate 2 is released under the action of the first nitrogen spring 10, the upper mold side flange slider 3 is released under the action of the second nitrogen spring 12, and the upper mold side flange small pressure plate 4 is released under the action of the third nitrogen spring 13;

[0039] (2) The mold starts to work. The upper mold body 1, the upper mold main pressure plate 2 and the upper mold side flange slider 3 move downward together under the action of the slider on the press until the upper mold main pressure plate 2 contacts the lower mold filling wedge 6 and continues to move downward until the stroke of the first nitrogen spring 10 is fully compressed. The pressing process of the upper mold main pressure plate 2 is completed.

[0040] (3) The upper mold side-flanging slider 3, along with the upper mold side-flanging small pressure plate 4 and the upper mold body 1, continues to move downward under the action of the slider on the press until the upper mold side-flanging small pressure plate 4 contacts the lower mold filling wedge 6, and continues to move downward until the stroke of the third nitrogen spring 13 is fully compressed, and the pressing process of the upper mold side-flanging small pressure plate 4 is completed.

[0041] (4) The upper mold body 1 continues to move downward under the action of the slider on the press. After contacting the lower mold small pressure plate 7, all the pressing process is completed and the flanging forming process begins.

[0042] (5) The flanging process ends when the upper mold body 1 and the lower mold body 5 contact the limiter 16. The upper mold body 1 reaches the bottom dead point.

[0043] See Figure 1 Structural diagram of the corner between the roof and the rear window; examine the product and standard process characteristics of the lower sill with and without flanged side panels at the corner between the roof and the rear window.

[0044] See Figure 2 A schematic diagram of the side panel without flanges at the corner of the roof and rear window shows the product and process characteristics.

[0045] See Figure 3 A schematic diagram of the process for the flanged side panel with under-pressurization at the corner of the roof and rear window. View the product and process characteristics of the flanged side panel at the corner of the roof and rear window.

[0046] See Figure 4 A cross-sectional structural diagram of the molding die for the flanged side panel at the corner of the top cover and rear windshield. During die operation, the lower die filling wedge 6 has reached its working position under the action of the driving wedge 8, and the lower die small pressure plate 7's stroke is released under the action of nitrogen spring 15 (number four). The upper die main pressure plate 2's stroke is released under the action of nitrogen spring 10 (number one), the upper die side flange slider 3's stroke is released under the action of nitrogen spring 12 (number two), and the upper die side flange small pressure plate 4's stroke is released under the action of nitrogen spring 13 (number three).

[0047] The mold begins operation. The upper mold body 1, the upper mold main pressure plate 2, and the upper mold side flanging slider 3 move downward together under the action of the slider on the press until the upper mold main pressure plate 2 contacts the lower mold filling wedge 6. Then, it continues to move downward until the stroke of the first nitrogen spring 10 is fully compressed, and the pressing process of the upper mold main pressure plate 2 is completed. The upper mold side flanging slider 3, along with the upper mold side flanging small pressure plate 4 and the upper mold body 1, continues to move downward under the action of the slider on the press until the upper mold side flanging small pressure plate 4 contacts the lower mold filling wedge 6. Then, it continues to move downward until the stroke of the third nitrogen spring 13 is fully compressed, and the pressing process of the upper mold side flanging small pressure plate 4 is completed. The upper mold body 1 continues to move downward under the action of the slider on the press. After contacting the lower mold small pressure plate 7, all pressing processes are completed, and the flanging forming process begins. The flanging forming process ends when the upper mold body 1 contacts the limiter 16 on the lower mold body 5 and the upper mold body reaches the bottom dead center.

[0048] After the slide on the press completes one stroke, the working stroke of the side flange mold is completed.

[0049] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A molding die for a flanged side panel at the corner of the top cover and rear windshield, characterized in that: The upper mold body includes an upper mold main pressure plate (2), an upper mold side flange slider (3), an upper mold side flange small pressure plate (4), a lower mold body (5), a lower mold filling wedge (6), a lower mold small pressure plate (7), and a lower mold driving wedge (8). The upper mold main pressure plate (2) is slidably connected to the upper mold body (1) via a guide plate (9), and a nitrogen spring (10) provides power to the upper mold main pressure plate (2). The upper mold side flange slider (3) is slidably connected to the upper mold body (1) via a guide plate (17), and is slidably connected to the lower mold body (5) via a guide plate (11). During the sliding action, nitrogen spring No. 2 (12) provides power to the upper mold side flange slider (3), and controls the movement of the upper mold side flange small pressure plate (4) under the action of nitrogen spring No. 3 (13); the lower mold filling wedge (6) moves under the action of the lower mold driving wedge (8), the lower mold small pressure plate (7) and the lower mold filling wedge (6) are connected by sliding action through guide plate No. 3 (14), nitrogen spring No. 4 (15) provides power to the lower mold small pressure plate (7), the nitrogen spring No. 4 (15) is a nitrogen spring with controllable stroke and has a locking function, and a limiter (16) is installed on the lower mold body (5).

2. The forming mold for the flange-type side panel at the corner of the top cover and rear windshield as described in claim 1, characterized in that: The first nitrogen spring (10) is mounted on the upper mold body (1) by mounting screws.

3. The molding die for the flanged side panel at the corner of the top cover and rear windshield as described in claim 1, characterized in that: The second nitrogen spring (12) is mounted on the upper mold body (1) by mounting screws.

4. The molding die for the flanged side panel at the corner of the top cover and rear windshield as described in claim 1, characterized in that: The No. 3 nitrogen spring (13) is installed on the upper mold side flange slider (3) by mounting screws, providing power to the upper mold side flange small pressure plate (4).

5. The forming mold for the flange-type side panel at the corner of the top cover and rear windshield as described in claim 1, characterized in that: The No. 4 nitrogen spring (15) is installed on the lower die filling wedge (6) by mounting screws, providing a power source for the lower die small pressure plate (7).

6. A molding method for a product with a flange-type side panel at the corner of the top cover and rear windshield as described in any one of claims 1-5, characterized in that: Specifically, the following steps are included: (1) When the mold is working, the lower mold filling wedge (6) has reached the working position under the action of the lower mold driving wedge (8), the lower mold small pressure plate (7) is released under the action of the fourth nitrogen spring (15); the upper mold main pressure plate (2) is released under the action of the first nitrogen spring (10), the upper mold side flange slider (3) is released under the action of the second nitrogen spring (12), and the upper mold side flange small pressure plate (4) is released under the action of the third nitrogen spring (13); (2) The mold starts to work. The upper mold body (1), the upper mold main pressure plate (2) and the upper mold side flange slider (3) move downward together under the action of the slider on the press until the upper mold main pressure plate (2) contacts the lower mold filling wedge (6). Then it continues to move downward until the stroke of the first nitrogen spring (10) is fully compressed, and the pressing process of the upper mold main pressure plate (2) is completed. (3) The upper mold side-flanging slider (3) carries the upper mold side-flanging small pressure plate (4) and the upper mold body (1) and continues to move downward under the action of the slider on the press until the upper mold side-flanging small pressure plate (4) contacts the lower mold filling wedge (6) and continues to move downward until the stroke of the No. 3 nitrogen spring (13) is fully compressed, and the pressing process of the upper mold side-flanging small pressure plate (4) is completed. (4) The upper mold body (1) continues to move downward under the action of the slider on the press. After contacting the lower mold small pressure plate (7), all the pressing process is completed and the flanging process begins. (5) The upper mold body (1) reaches the bottom dead center when it comes into contact with the limiter (16) on the lower mold body (5), and the flanging process ends.

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