Pre-bending supporting device for automobile door frame outer plate

Abstract

The utility model discloses a pre-bending supporting device for an automobile door frame outer plate, which comprises a base assembly, a platform main body, at least three supporting columns distributed on the edge of the platform main body, clamping structures arranged on the supporting columns, and a profiling moulding bed arranged in the middle of the platform main body, the surface profile of the profiling moulding bed is matched with the shape of the outer plate of the automobile door frame; the positioning mechanism is located above the platform body and comprises a main frame and a plurality of connecting rods connected to the outer side of the main frame; the free end of each connecting rod is connected with the corresponding positioning hole in the corresponding supporting column in a matched mode through a positioning plug pin, and each connecting rod and the corresponding supporting column are fixedly installed through the corresponding clamping structure. According to the technical scheme, dynamic adjustment can be achieved, adaptability is high, and through the arrangement of the pre-bending supporting device, the problem that supporting is insufficient in the pre-bending stage of the outer plate is solved.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to a pre-bending support device for the outer panel of an automobile door frame. Background Technology

[0002] When a car is involved in a collision, the outer parts of the vehicle, such as the hood, door shells, and fenders, are easily dented, scratched, or torn. However, the internal structure of the vehicle is relatively less impacted, and some parts remain intact and have the value of being reused. Against this backdrop, the remanufacturing industry has emerged.

[0003] As a crucial component of automobiles, the door frame is typically remanufactured using edge-wrapping techniques that involve rolling or bending the inner panel directly and welding it to the outer panel. Figure 1 a). However, for outer panels with flanges at a specific angle, if the rolling machine directly welds the inner panel to the outer panel, the flange of the outer panel often exhibits wavy deformation due to a lack of effective support. Figure 1 (b) This affects the appearance and sealing performance. Existing solutions typically rely on high-precision molds or complex tooling for pre-bending support, which is costly, has poor adaptability, and long changeover cycles, making it difficult to meet production requirements.

[0004] In summary, it is essential to equip the outer panel of the automotive door frame with a pre-bending support device. Utility Model Content

[0005] This utility model provides a pre-bending support device for the outer panel of an automobile door frame. It is dynamically adjustable and highly adaptable. By setting up the pre-bending support device, it solves the problem of insufficient support during the pre-bending stage of the outer panel. Its main technical solution is as follows:

[0006] A pre-bending support device for an automotive door frame outer panel, characterized in that: it includes a base assembly comprising a platform body, at least three support columns distributed along the edge of the platform body, a clamping structure disposed on the support columns, and a contouring mold disposed in the middle of the platform body, wherein the surface contour of the contouring mold matches the shape of the automotive door frame outer panel; a positioning mechanism located above the platform body, comprising a main frame and several connecting rods connected to the outside of the main frame; the free ends of each connecting rod are respectively connected to positioning holes on each support column via positioning pins, and are fixedly installed to the support columns via the clamping structure; a dynamic pre-bending module comprising a slide rail fixed below the main frame, a contouring die slidably connected to the slide rail, and a driving structure for moving the contouring die along the slide rail, wherein the contact surface angle of the contouring die is consistent with the flange angle of the automotive door frame outer panel.

[0007] Preferably, the dynamic pre-bending module further includes a slide table, on which the contouring die is disposed and slidably connected to the slide rail.

[0008] Preferably, the contour die is connected to the slide table via a connecting block, and the connecting block is provided with an elongated hole extending laterally for adjusting the lateral installation position of the contour die.

[0009] Preferably, the drive structure is fixed to the main frame; the drive structure is configured as a drive cylinder, and the output end of the drive cylinder can drive the slide table to slide on the slide rail.

[0010] Preferably, the extension direction of the slide rail is parallel to the normal direction of the outer plate flange.

[0011] Preferably, the main frame is further provided with a limiting block, which is located at the end of the slide rail to limit the slide table from sliding to the end position so that the contour die can interact with the outer edge of the car door frame.

[0012] Preferably, the clamping structure includes a clamping cylinder fixed on the support column, and the output end of the clamping cylinder is provided with a clamping claw. When the clamping cylinder is activated, the clamping claw clamps and fixes the connecting rod to the support column.

[0013] Preferably, the positioning pin and the positioning hole on the support column are in clearance fit or interference fit.

[0014] Preferably, a lifting ring is provided at the top of the main frame, and the lifting ring is connected by a crane to realize multi-directional spatial adjustment of the positioning mechanism.

[0015] Preferably, the conformal mold is detachably connected to the platform body by bolts.

[0016] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0017] (1) This utility model provides a pre-bending support device for the outer panel of an automobile door frame. It is dynamically adjustable and highly adaptable. By setting up the pre-bending support device, the problem of insufficient support during the pre-bending stage of the outer panel is solved. In this utility model, the driving structure pushes the contour die along the slide rail, so that the contour die is in close contact with the outer edge of the outer panel to be bent and folded. When the rolling machine performs the pressing, bending and welding process, the contact angle of the contour die interacts with the outer panel flange and forces the flange to maintain the preset bending angle, preventing wave deformation caused by insufficient support. Secondly, the contour die and contour die can be quickly adapted to the outer panels of different car models through rapid shape change, which has a wider range of applications and can also effectively reduce costs.

[0018] (2) In this technical solution, there is no need for a complex adjustment mechanism. In order to simplify the design, an elongated hole extending laterally is set on the connecting block. In this way, the lateral installation position of the contour die can be freely adjusted to adapt to outer plates of different widths or flange angles without replacing the entire slide or connecting block. Secondly, the elongated hole can also be used for adjustment and compensation during the bending process of the outer plate to ensure the fitting accuracy of the contour die and the flange.

[0019] (3) In this technical solution, the drive structure is directly replaced by a drive cylinder, which has a higher degree of automation and more stable function.

[0020] (4) In this technical solution, the extension direction of the slide rail is parallel to the normal direction of the outer plate flange, so as to eliminate the skew caused by the lateral force and the fitting accuracy of its pre-bending support is higher.

[0021] (5) In this technical solution, the upper limit block of the main frame enables the contour die to move and position precisely within the outer plate flange for support, without overtraveling and causing deformation of the outer plate flange. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure when the inner and outer panels are welded together;

[0024] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic cross-sectional view of an embodiment of the present utility model;

[0026] Figure 4 for Figure 3 A magnified view of part C shown;

[0027] Figure 5 This is a schematic diagram of the overall structure of the base assembly according to an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the overall structure of the positioning mechanism in an embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the overall structure of the dynamic pre-bending module according to an embodiment of the present invention. Figure 1 ;

[0030] Figure 8 This is a schematic diagram of the overall structure of the dynamic pre-bending module according to an embodiment of the present invention. Figure 2 ;

[0031] The annotations in the attached figures are explained as follows:

[0032] A. Outer panel of the car door frame; B. Inner panel;

[0033] Base components: 11. Platform body; 12. Support column; 121. Positioning hole; 131. Clamping cylinder; 132. Clamping claw; 14. Contouring mold;

[0034] Positioning mechanism: 21. Main frame; 22. Connecting rod; 23. Positioning pin; 24. Limiting block; 25. Lifting ring;

[0035] Dynamic pre-bending module: 31. Slide rail; 32. Contouring die; 33. Drive structure; 34. Slide table; 35. Connecting block. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0038] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0039] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0040] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0041] Please see Figures 2 to 8 .

[0042] This embodiment provides a pre-bending support device for automotive door frame outer panels. It is dynamically adjustable and highly adaptable, solving the problem of insufficient support during the pre-bending stage of the outer panel. The pre-bending support device in this embodiment mainly includes: a base assembly, a positioning mechanism, and a dynamic pre-bending module. The cooperation of these three structures enables rapid positioning, dynamic pre-bending, and adaptive locking positioning of the automotive door frame outer panel A.

[0043] The base assembly includes a platform body 11, at least three support columns 12 distributed along the edge of the platform body 11, a clamping structure on the support columns 12, and a contour mold 14 located in the middle of the platform body 11 and detachably connected to each other by bolts. The contour of the contour mold matches the shape of the outer panel A of the car door frame. Different contour molds 14 can be used for different car models. The contour mold 14 is used to support and position the outer panel A of the car door frame. In this embodiment, the number of support columns 12 is selected according to the number of flanges to be turned on the outer panel.

[0044] In this embodiment, when the outer panel A of the car door frame is placed on the mold 14, it is in an unfolded state, that is, the folded edge of the outer panel A of the car door frame is a folded edge, which is vertically set perpendicular to the horizontal plane; when the folded edge of the outer panel A of the car door frame is subjected to force, it will begin to bend at a certain angle to form a folded edge. Therefore, if the inner side of the folded edge is not supported and is folded directly, the entire outer panel edge is very easy to deform.

[0045] The positioning mechanism, located above the platform body 11, includes a main frame 21 and several connecting rods 22 connected to the outside of the main frame 21. The free ends of each connecting rod 22 are connected to the positioning holes 121 on each support column 12 by positioning pins 23, and are fixedly installed to the support column 12 by clamping structure. In this embodiment, the main frame 21 is formed by multiple long rods intersecting in a single piece to ensure a certain supporting force. One end of each connecting rod 22 is connected to the outer wall of each long rod. Thus, when the other end of each connecting rod 22 is fixed to the support column 12 on the outer periphery of the main frame 21, the main frame 21 will be supported and suspended above the contour mold 14 without interfering with it.

[0046] The dynamic pre-bending module includes a slide rail 31 fixed below the main frame 21, a contour die 32 slidably connected to the slide rail 31, and a drive structure 33 for moving the contour die 32 along the slide rail 31. The extension direction of the slide rail 31 is parallel to the normal direction of the outer panel flange to eliminate the influence of lateral force on the support effect caused by the skewness of the contour die 32. The contact surface angle of the contour die 32 is consistent with the angle after the outer panel A of the car door frame is flanged. This contour die 32 can be quickly changed according to the flange angle of the outer panel of different car models, thus having a wider range of applications. See also... Figure 3 and Figure 4 The dynamic pre-bending module is connected to the main frame 21 and will be suspended. Under the action of the drive structure 33, the contour die 32 slides along the slide rail 31 to the corner of the outer panel to be turned. When the subsequent rolling machine folds the outer edge of the outer panel into a flange, the contact surface of the contour die 32 and the inner side of the flange of the outer panel A of the car door frame will be in close contact with each other, thus providing a certain pre-bending support.

[0047] In this embodiment, the dynamic pre-bending module also includes a slide table 34. The contour die 32 is connected to the slide table 34 via a connecting block 35, and is slidably connected to the slide rail 31 via the slide table 34. The connecting block 35 is provided with an elongated hole (not shown) extending laterally, which is used to adjust the lateral installation position of the contour die 32. That is, when it is found that there is still an error in the tight fit between the contour die 32 and the flange, it is not necessary to replace the entire slide table 34 or the connecting block 35. It is only necessary to control the contour die 32 to slide laterally a certain distance on the elongated hole for fine adjustment and compensation, which is simple and convenient. The drive structure 33 is fixed on the main frame 21. The drive structure 33 is mainly a drive cylinder (an automated drive structure 33 can also be used, but it will require research and development and installation costs). The output end of the drive cylinder can drive the slide table 34 to slide on the slide rail 31. Therefore, the above dynamic pre-bending module as a whole has the ability to adjust and respond to external changes in real time. That is, the contouring die 32 moves linearly along the slide rail 31 through the slide table 34, combined with the thrust control of the drive cylinder (the cylinder pressure sensor or position encoder monitors the position of the slide table 34 in real time), and can accurately control and adjust the position of the contouring die 32 according to the real-time deformation state of the outer plate flange. In addition, during the pre-bending process, the outer plate may undergo local deformation due to material characteristics or processing errors. At this time, the dynamic pre-bending module can ensure the consistency between the contouring die 32 and the flange angle of the outer plate by dynamically fine-tuning the position of the contouring die 32.

[0048] In this embodiment, in order to prevent the contour die 32 from moving beyond its travel and directly pressing and deforming the outer panel to be turned, a limiting block 24 is also provided on the main frame 21. The limiting block 24 is located at the end of the slide rail 31. The position of the end direction is preset according to the position of the outer panel turning. In this way, the slide table 34 is restricted to slide to the end position so that the contour die 32 can just interact with the turning of the outer panel A of the car door frame without continuing to move beyond its travel.

[0049] In this embodiment, the clamping structure includes a clamping cylinder 131 fixed on the support column 12. The output end of the clamping cylinder 131 is provided with a clamping claw 132. When the clamping cylinder 131 is activated, the clamping claw clamps and fixes the connecting rod 22 to the support column 12. As a result, the positioning pin 23 on the connecting rod 22 disengages from the positioning hole 121 on the support column 12, causing the entire main frame 21 to shake.

[0050] In this embodiment, the positioning pin 23 and the positioning hole 121 on the support column 12 are in a clearance fit or an interference fit manner.

[0051] When the positioning pin 23 and the positioning hole 121 are fitted with a clearance fit, the outer diameter of the positioning pin 23 and the inner diameter of the positioning hole 121 are designed not to be completely matched, and there is a gap between them. This clearance fit can reduce the frictional resistance between the pin and the hole, making it easier to insert and pull out quickly, and shortening the time for changing and disassembling. During the bending process, the flange of the outer plate is subjected to dynamic stress, which may cause slight deformation of the support column 12. At this time, the clearance fit can absorb the small deformation, avoid stress concentration between the pin and the hole due to rigid connection, and extend the service life of the parts.

[0052] When the positioning pin 23 and the positioning hole 121 are connected by an interference fit, the outer diameter of the positioning pin 23 is designed to be larger than the inner diameter of the positioning hole 121. Although this method can effectively connect and achieve the function, its rigid connection may lead to excessive stress concentration. Therefore, in this embodiment, a clearance fit is the preferred method.

[0053] In this embodiment, a lifting ring 25 is also provided on the top of the main frame 21. The lifting ring 25 is connected by a crane to realize multi-directional spatial adjustment of the positioning mechanism. That is, no excessive manual intervention is required. Only the crane needs to be operated to align the positioning pin 23 with the positioning hole 121 for connection.

[0054] In this embodiment, the platform body 11 and the support column 12 are both mounted on the base. Multiple support rods with casters are provided below the base, allowing the entire pre-bending support device to move freely.

[0055] The working principle and usage process of this utility model:

[0056] First, see Figure 5 Install the base assembly, select the contour mold 14 according to the model door frame outer panel to be processed, and install the contour mold 14 to the middle of the platform body 11 of the base with bolts; then, set three support columns 12 at equal intervals around the outer periphery of the contour mold 14 and fix them to the base; then, install the clamping cylinder 131 and clamping claw 132 in the clamping structure on the upper free end of the support column 12; finally, place the unbent car door frame outer panel A to be processed on the upper end of the contour mold 14 (the flange of the unbent car door frame outer panel A is still in a vertical state perpendicular to the horizontal plane).

[0057] Second, see Figure 6First, install the positioning mechanism. Then, distribute the three connecting rods 22 evenly around the outer perimeter of the main frame 21 and fix one free end of the connecting rod 22 to the frame of the main frame 21. Next, the crane can hook the lifting ring 25 and lift the main frame 21 and connecting rod 22 together until the positioning pin 23 on the other free end of the connecting rod 22 is inserted into the positioning hole 121 of the support column 12 and engages. After engagement, control the clamping cylinder 131 to run, drive the clamping claw 132 to move downward and engage with the upper end of the support column 12 to fix the connecting rod 22 on the support column 12. At this time, the entire main frame 21 will be suspended above the mold 14.

[0058] Third, see Figure 7 and Figure 8 The dynamic pre-bending module is installed. There are three sets of dynamic pre-bending modules. The slide rail 31 is fixedly installed below the main frame 21, the slide table 34 is slidably installed on the slide rail 31, and the drive cylinder is fixedly installed on the main frame 21 and its output end is connected to the slide table 34. The contour die 32 is fixedly installed on the front end of the slide table 34 through the connecting block 35 and corresponds to the flange of the outer panel A of the car door frame. The contour die 32 is selected according to the flange angle of the unbent outer panel A of the car door frame to be processed. For example, if the flange angle of the outer panel A of the car door frame to be bent is 60°, the contour die 32 with a 60° contact surface angle is selected.

[0059] Finally, the drive cylinder is controlled to operate, and the output end of the drive cylinder drives the contour die 32 to slide relative to the slide table 34 through thrust. See below. Figure 4 The contour die 32 is moved to the outer edge of the unbent outer panel A of the car door frame, thus providing pre-bending support for the outer panel. When the inner panel B is subsequently welded to the outer panel A, the rolling machine bends the outer panel A. The contact surface of the contour die 32 and the inner edge of the outer panel A begin to adhere tightly to each other, and no wrinkles or wavy deformations occur during the entire bending process. Therefore, in this invention, the driving structure 33 pushes the contour die 32 to move along the slide rail 31, causing the contour die 32 to be positioned close to the outer edge of the outer panel to be bent. When the rolling machine performs the bending and welding process, the contact surface angle of the contour die 32 interacts with the outer panel's folded edge and forces the folded edge to maintain the preset bending angle, preventing wavy deformation due to insufficient support. Furthermore, the contour die and contour die 32 can be quickly adapted to outer panels of different car models through rapid shape change, expanding the application range and effectively reducing costs.

[0060] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A pre-bending support device for the outer panel of an automobile door frame, characterized in that: include The base assembly includes a platform body, at least three support columns distributed along the edge of the platform body, a clamping structure on the support columns, and a contouring mold located in the middle of the platform body, wherein the surface contour of the contouring mold matches the shape of the outer panel of the car door frame. The positioning mechanism is located above the main body of the platform and includes a main frame and several connecting rods connected to the outside of the main frame; the free ends of each connecting rod are respectively connected to the positioning holes on each support column through positioning pins, and are fixedly installed to the support column through the clamping structure. The dynamic pre-bending module includes a slide rail fixed below the main frame, a contour die slidably connected to the slide rail, and a drive structure for moving the contour die along the slide rail. The contact surface angle of the contour die is consistent with the flange angle of the outer panel of the car door frame.

2. The pre-bending support device for an automobile door frame outer panel as described in claim 1, characterized in that: The dynamic pre-bending module also includes a slide table, on which the contouring die is disposed and slidably connected to the slide rail.

3. The pre-bending support device for an automobile door frame outer panel as described in claim 2, characterized in that: The contour die is connected to the slide table via a connecting block. The connecting block has an elongated hole extending laterally for adjusting the lateral installation position of the contour die.

4. The pre-bending support device for an automobile door frame outer panel as described in claim 2, characterized in that: The drive structure is fixed to the main frame; the drive structure is configured as a drive cylinder, and the output end of the drive cylinder can drive the slide table to slide on the slide rail.

5. The pre-bending support device for an automobile door frame outer panel as described in claim 1, characterized in that: The extension direction of the slide rail is parallel to the normal direction of the outer plate flange.

6. A pre-bending support device for an outer panel of an automobile door frame as described in claim 2, characterized in that: The main frame is also provided with a limiting block, which is located at the end of the slide rail to limit the slide table from sliding to the end position so that the contour die can interact with the outer edge of the car door frame.

7. The pre-bending support device for an outer panel of an automobile door frame as described in claim 1, characterized in that: The clamping structure includes a clamping cylinder fixed on the support column. The output end of the clamping cylinder is provided with a clamping claw. When the clamping cylinder is activated, the clamping claw clamps and fixes the connecting rod to the support column.

8. The pre-bending support device for an automobile door frame outer panel as described in claim 1, characterized in that: The positioning pin and the positioning hole on the support column are either clearance fit or interference fit.

9. A pre-bending support device for an outer panel of an automobile door frame as described in claim 1, characterized in that: The main frame is equipped with a lifting ring at the top, which is connected by a crane to enable multi-directional spatial adjustment of the positioning mechanism.

10. A pre-bending support device for an outer panel of an automobile door frame as described in claim 1, characterized in that: The conformal mold is detachably connected to the platform body by bolts.

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