Aluminum alloy profile door frame and processing method thereof

Abstract

The present application relates to a kind of aluminum alloy profile door frame and its processing method.Therein, the door frame includes: the door frame bent beam of closed structure by bending aluminum alloy profile, the profile has oppositely arranged inner beam plate and outer beam plate, and the first connecting beam plate and the second connecting beam plate that connect inner beam plate and outer beam plate so that the profile is closed structure;The first connecting beam plate is provided with the mud groove for limiting vehicle window glass on the first end of the inner beam plate and the first end of the outer beam plate, and the second connecting beam plate is provided with limiting protrusion near one end of the outer beam plate;Inner window sill beam and car door outer cross beam are transversely fixedly installed between the two side beams of door frame bent beam, and car door inner water cut is installed on inner window sill beam;Car door outer cross beam is connected with car door outer panel, and car door outer water cut is installed on car door outer cross beam, and car door outer water cut and car door inner water cut cooperate to limit vehicle window glass.This solves the problem of high investment cost of door development mold and large weight of door.

Description

Technical Field

[0001] This invention relates to the field of vehicle body structure design technology, and more specifically, to an aluminum alloy profile vehicle door frame and its processing method. Background Technology

[0002] With the development of the automotive and logistics industries, competition in the commercial vehicle market is becoming increasingly fierce. However, existing commercial vehicle doors are generally made by stamping sheet metal, and this production process has problems such as high initial mold investment costs, long development cycles, and the large weight of the doors themselves, resulting in excessively high door costs, which in turn leads to correspondingly high maintenance costs later on.

[0003] Therefore, reducing the mold investment for car door development and achieving lightweight design are technical problems that commercial vehicles need to solve. Summary of the Invention

[0004] To address the issues of high mold development costs and heavy weight of car doors, this invention provides an aluminum alloy profile car door frame and its processing method. The aluminum alloy profile car door frame includes:

[0005] A closed-structure door frame curved beam is formed by bending aluminum alloy profiles. The profile has an inner beam plate and an outer beam plate arranged opposite to each other, as well as a first connecting beam plate and a second connecting beam plate that connect the inner beam plate and the outer beam plate to make the profile have a closed structure.

[0006] The inner beam plate is sealed with the door opening sealing strip, the outer beam plate overlaps with the outer panel of the car door, the first connecting beam plate connecting the first end of the inner beam plate and the first end of the outer beam plate is provided with a groove for limiting the window glass, and the second connecting beam plate is provided with a limit protrusion at one end near the outer beam plate.

[0007] The inner window sill beam and the outer door crossbeam are horizontally fixed between the two side beams of the door frame curved beam, and the inner window sill beam is connected to the door interior panel. The door interior panel is equipped with an inner door water cutter.

[0008] The outer crossbeam of the door is connected to the outer panel of the door, and an outer water cutter is installed on the outer crossbeam of the door. The outer water cutter and the inner water cutter cooperate to limit the movement of the window glass.

[0009] In some embodiments, one end of the second connecting beam is connected to the inner beam, and the other end is connected between the first and second ends of the outer beam, with the second end of the outer beam bent toward the outer door panel.

[0010] In some embodiments, the limiting protrusion includes two protrusions protruding from the second connecting beam plate, the outer door sealing strip is fixedly installed on the limiting protrusion, and a sealing element is installed at the second end of the outer beam plate to ensure the sealing of the door.

[0011] In some embodiments, the inner window sill beam has a long plate and a short plate disposed opposite to each other, the long plate being disposed at the upper end near the inner water cut of the vehicle door, and the short plate being disposed at the lower end away from the inner water cut of the vehicle door; and a connecting plate and a step plate disposed opposite to each other connecting the long plate and the short plate.

[0012] In some embodiments, the cross section of the outer beam of the door is trapezoidal, and the upper bottom edge of the trapezoidal structure is connected to the outer panel of the door. The lower bottom edge of the trapezoidal structure near the outer water-cutting edge of the door has an extension protruding from the trapezoidal structure for mounting the outer water-cutting edge of the door.

[0013] In some embodiments, the door frame curved beam further includes a hinge reinforcement plate fixedly mounted on the second connecting beam plate, and the installation height of the hinge reinforcement plate on the door frame curved beam begins at the upper hinge and ends at the lower hinge of the door.

[0014] In some embodiments, the thickness of the first connecting beam plate is less than the thickness of the inner beam plate and / or the outer beam plate.

[0015] In some embodiments, the thickness of the inner beam plate and / or the outer beam plate is less than the thickness of the second connecting beam plate.

[0016] In some embodiments, the door frame curved beam is provided with mounting holes for installing the door lock at the door lock, and openings are provided at corresponding positions of the first connecting beam plate and the second connecting beam plate.

[0017] The door frame of this invention mainly includes a door frame curved beam, an inner window sill beam, and an outer door crossbeam, all three of which are made of aluminum alloy profiles. The door frame curved beam requires bending the aluminum alloy profile into a closed frame structure. The profile used to process the door frame curved beam consists of an inner beam plate, an outer beam plate, a first connecting beam plate, and a second connecting beam plate. The first connecting beam plate is located on the inner ring of the door frame curved beam, and its grooves can confine the window glass. The second connecting beam plate is located on the outer ring of the door frame curved beam, and its limiting protrusion cooperates with the outer door sealing strip for sealing.

[0018] Because the aforementioned door frame is made of aluminum alloy profiles, it significantly reduces the weight of the door, achieving lightweight construction. Furthermore, the processing of aluminum alloy profiles is simpler and more efficient. Using extruded aluminum alloy profiles, the mold investment cost is basically controlled at around 200,000 yuan, compared to the 3 million yuan cost required for traditional stamping sheet metal molds, greatly saving on door production mold costs. In addition, in terms of efficiency, the development cycle for aluminum alloy extrusion profile molds is approximately 25 days, while the development cycle for traditional stamping sheet metal molds is approximately 90 days. Therefore, the technical solution of this invention can also significantly shorten the production cycle.

[0019] The present invention also provides a method for processing an aluminum alloy profile car door frame, for processing the aluminum alloy profile car door frame described in any of the above claims, comprising:

[0020] S100: By heating the aluminum alloy billet and extruding it through different molds, aluminum alloy profiles required for preparing door frame curved beams, inner window sill beams and outer door crossbeams are obtained, namely profile a, profile b and profile c;

[0021] S200: The profile a is bent so that the profile a is bent toward the direction of the first connecting beam plate and bent into a closed structure to obtain a door frame curved beam with a door outer frame structure.

[0022] S300: Cut profiles b and c to preset dimensions to obtain the inner window sill beam and the outer door crossbeam;

[0023] S400: The inner window sill beam and the outer door crossbeam are fixedly installed between the two side beams of the door frame curved beam to obtain the door frame.

[0024] Based on this processing method, the aforementioned aluminum alloy profile car door frame can be produced. The resulting car door frame also has the characteristics of being lightweight, low-cost, and having a short production period. Attached Figure Description

[0025] Figure 1 A schematic cross-sectional view of the door frame curved beam of a vehicle door frame according to one embodiment is shown;

[0026] Figure 2 A cross-sectional schematic diagram of another location of the door frame curved beam of one embodiment of the vehicle door frame is shown;

[0027] Figure 3 A schematic diagram of the structure of a door body and a portion of the vehicle body body according to one embodiment is shown;

[0028] Figure 4 It shows Figure 3 Sectional view at point A in the middle;

[0029] Figure 5 It shows Figure 3 Sectional view at point B;

[0030] Figure 6 It shows Figure 3 Sectional view at point C;

[0031] Figure 7 It shows Figure 3 Sectional view at point D;

[0032] Figure 8 It shows Figure 3 Sectional view at point E in the middle;

[0033] Figure 9 It shows Figure 3 Sectional view at point F;

[0034] Figure 10 A schematic diagram of the structure of the door body in one embodiment is shown.

[0035] Figure label:

[0036] 01 is the main body of the car door, 11 is the door frame curved beam, 111 is the inner beam plate, 112 is the outer beam plate, 113 is the mud groove, 114 is the limiting protrusion, 115 is the hinge reinforcement plate, 12 is the inner window sill beam, 13 is the outer crossbeam of the car door, 14 is the outer panel of the car door, 141 is the outer sealing strip of the car door, 142 is the outer water cutter of the car door, 15 is the interior panel of the car door, 151 is the inner water cutter of the car door, 16 is the window glass, 17 is the door lock; 02 is the main body of the car body, 21 is the door opening sealing strip, 22 is the upper hinge, 23 is the lower hinge, 24 is the corner plate, 241 is the corner plate sealing strip, 25 is the headliner interior panel. Detailed Implementation

[0037] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0038] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0039] See Figures 1 to 10 As shown, an aluminum alloy profile car door frame is provided in an embodiment of the present invention. The car door frame includes a door frame curved beam 11, an inner window sill beam 12, and an outer door crossbeam 13.

[0040] Specifically, the door frame curved beam 11 is made of aluminum alloy profile bent into a closed structure. This profile has an inner beam plate 111 and an outer beam plate 112 arranged opposite to each other, as well as a first connecting beam plate and a second connecting beam plate connecting the inner beam plate 111 and the outer beam plate 112 to form a closed structure. Figure 1 and Figure 10 As shown, and through Figures 3 to 9 The structure of the door frame curved beam 11 is explained in detail by combining sectional views at different positions of the door frame.

[0041] The inner beam plate 111 is sealed with the door opening sealing strip 21 on the body body 02. The outer beam plate 112 overlaps with the outer door panel 14. The first connecting beam plate connects the first end of the inner beam plate 111 and the first end of the outer beam plate 112, and is provided with a mud groove 113 for limiting the window glass 16. When the window glass 16 is raised or lowered, it is limited by the mud groove 113, so that it can be raised and lowered stably and safely.

[0042] In this embodiment, a door opening sealing strip 21 is installed at the stop of the vehicle body 02. The door opening sealing strip 21 has an interference of 1.8mm-3mm with the stop of the vehicle body 02, preferably 2.2mm, to ensure that the door opening sealing strip 21 is clamped at the stop of the vehicle body 02. The door opening sealing strip 21 interferes with the inner beam plate 111 of the door frame curved beam 11 by 4mm-6mm to ensure the sealing of the door, preferably 5mm.

[0043] The second connecting beam plate is provided with a limit protrusion 114 at one end near the outer beam plate 112, such as Figures 1 to 2 As shown, an outer door sealing strip 141 is installed inside the limiting protrusion 114 to achieve a seal between the door body 01 and the body body 02 when the door is closed.

[0044] like Figure 9 ( Figure 3 (Sectional view at point F) to Figure 10 As shown, the inner window sill beam 12 and the outer door crossbeam 13 are horizontally fixed between the two side beams of the door frame curved beam 11, and the inner window sill beam 12 is connected to the door interior panel 15. The door interior panel 15 is equipped with the door inner water cutter 151.

[0045] The outer crossbeam 13 of the door is connected to the outer panel 14 of the door, and an outer water cutter 142 is installed on the outer crossbeam 13 of the door. The outer water cutter 142 and the inner water cutter 151 of the door work together to limit the window glass 16.

[0046] In this embodiment, as Figures 1 to 2 As shown, one end of the second connecting beam plate is connected to the inner beam plate 111, and the other end is connected between the first and second ends of the outer beam plate 112, with the second end of the outer beam plate 112 bent towards the outer door panel 14. The second end of the outer beam plate 112 is exposed outside the closed structure of the door frame curved beam 11, and a sealing element is provided on its bent second end to further ensure the sealing between the door body 01 and the body body 02 when the door is closed. Figures 5 to 6 As shown, they are respectively represented as Figure 3 Sectional views at points B and C.

[0047] In a preferred embodiment of this application, the limiting protrusion 114 includes two protrusions protruding from the second connecting beam plate, see [link]. Figure 1 , Figure 2 and Figure 4 ( Figure 3 (Cross-sectional view at point A) The outer door sealing strip 141 is fixedly installed on the limiting protrusion 114. It is secured to the outer door sealing strip 141 by two protrusions to ensure its stability when the door is opened and closed. In one embodiment of this application, one of the protrusions is located on the second connecting beam plate, and the other is located at the second end of the outer beam plate 112, as shown in the figure. Figures 1 to 2 As shown, the protrusion on the second connecting beam plate bends at its top towards the protrusion on the outer beam plate 112 to secure the outer door sealing strip 141. Of course, the structure and position of the limiting protrusion 114 are not limited by other feasible structures, provided that the outer door sealing strip 141 can be securely installed and the sealing between the outer door sealing strip 141 and the body body 02 can be ensured.

[0048] Specifically, the outer door sealing strip 141 is snapped into the limiting protrusion 114, serving both sealing and aesthetic purposes. There is an interference of 2mm-4mm between the outer door sealing strip 141 and the body body 02, preferably 3mm, to ensure sealing.

[0049] See Figure 9 The aforementioned inner window sill beam 12 has a long plate and a short plate arranged opposite each other, as well as a connecting plate and a stepped plate arranged opposite each other connecting the long plate and the short plate. The long plate is located at the upper end near the inner water cutter 151 of the door, and the short plate is located at the lower end away from the inner water cutter 151 of the door. A window regulator for controlling the raising and lowering of the window glass 16 is installed in the groove formed by the stepped plate. The inner window sill beam 12 is also processed from aluminum alloy profiles, which has low processing cost and short cycle, and the formed inner window sill beam 12 has a lighter weight, which is an important component of the lightweight design of the door frame.

[0050] See Figure 9 The cross section of the outer beam 13 of the door is trapezoidal, and the upper bottom edge of the trapezoidal structure is connected to the outer panel 14 of the door. The lower bottom edge of the trapezoidal structure near the outer water cutter 142 of the door has an extension protruding from the trapezoidal structure for installing the outer water cutter 142 of the door.

[0051] In actual production, the aforementioned outer door water cutter 142 is snapped onto the outer door crossbeam 13, and the inner door water cutter 151 presses against the outer door water cutter 142 to press against the window glass 16, maintaining an interference of 2mm-4mm with the window glass 16 to ensure that the glass does not shake when moving up and down. Preferably, an interference of 3mm is maintained, that is, the outer door water cutter 142 and the inner door water cutter 151 interfere with the window glass 16 by 3mm respectively.

[0052] In a preferred embodiment, such as Figure 2 , Figures 5 to 6As shown, the door frame curved beam 11 also includes a hinge reinforcing plate 115 fixedly installed on the second connecting beam plate. The installation height of the hinge reinforcing plate 115 on the door frame curved beam 11 begins at the upper hinge 22 and ends at the lower hinge 23 of the door. That is, the upper and lower ends of the hinge reinforcing plate 115 are located at the corresponding positions of the upper hinge 22 and the lower hinge 23 on the door frame curved beam 11, so as to fix the upper hinge 22 and the lower hinge 23 on the hinge reinforcing plate 115. Specifically, the hinge reinforcing plate 115 is fixed to the second connecting beam plate by riveting. The upper hinge 22 and the lower hinge 23 are preferably installed on the door frame curved beam 11 by bolts, and the nuts are welded to the hinge reinforcing plate 115 on the back by projection welding.

[0053] like Figures 1 to 2 As shown, the width of the opening end of the mud trough 113 is smaller than the width of the bottom opening end of the mud trough 113, so as to limit the window glass 16 to prevent it from shaking.

[0054] The mud groove sealing strip is snapped into the mud groove 113 on the door frame curved beam 11, which serves to position the window glass 16. After installation, an interference of 2mm-4mm is set between the mud groove sealing strip and the window glass 16 to ensure the stability of the window glass 16 during vehicle driving and lifting. Preferably, the interference is set to 3mm.

[0055] In one embodiment of this application, the thickness of the first connecting beam plate is less than the thickness of the inner beam plate 111 and / or the outer beam plate 112.

[0056] Since the first connecting beam plate is located inside the door frame curved beam 11, it is subjected to compressive force during the bending process, which increases its thickness to some extent. The inner beam plate 111 and outer beam plate 112, located on either side of the door frame curved beam 11 (i.e., the inner and outer sides of the door), experience less thickness deformation during bending. Therefore, in the preferred embodiment, the inner beam plate 111 and outer beam plate 112 have the same thickness, while the first connecting beam plate has a thickness less than that of the inner beam plate 111 and / or outer beam plate 112, preventing further thickening due to compression during bending. This ensures that the final bent door frame curved beam 11 has a relatively uniform thickness at its cross-section, thus avoiding uneven stress that could affect the strength of the door frame.

[0057] Preferably, the thickness of the inner beam plate 111 and / or the outer beam plate 112 is less than the thickness of the second connecting beam plate.

[0058] In this embodiment, since the second connecting beam plate is located on the outside of the door frame curved beam 11, it is subjected to tensile force during the bending process, and its thickness will be reduced to some extent. Therefore, the thickness of the inner beam plate 111 and / or the outer beam plate 112 is set to be less than the thickness of the second connecting beam plate to avoid the second connecting beam plate being too thin due to tension. This ensures that the thickness of the door frame curved beam 11 formed by the final bending remains basically uniform at the cross-section, thereby avoiding uneven stress that could affect the strength of the door frame.

[0059] The door frame curved beam 11 has mounting holes for installing the door lock 17 at the door lock 17, and openings are provided at corresponding positions of the first connecting beam plate and the second connecting beam plate.

[0060] In this embodiment, as Figure 8 The diagram shows a cross-sectional view of the door frame curved beam 11 at the door lock 17. It can be seen that openings of different sizes and structures are provided at different locations on the door frame curved beam 11 to correspond to the structure of the door lock 17 and to accommodate it. It is understandable that the structure of the door frame curved beam 11 at the door lock 17 is influenced by the structure of the door lock 17 and is not limited to the structure shown in the diagram. In actual manufacturing, this area can be customized according to the specific requirements of the door lock 17.

[0061] The door frame of this invention mainly includes a door frame curved beam 11, an inner window sill beam 12, and an outer door crossbeam 13, all three of which are made of aluminum alloy profiles. The door frame curved beam 11 requires bending the aluminum alloy profile into a closed frame structure. The profile used to process the door frame curved beam 11 consists of an inner beam plate 111, an outer beam plate 112, a first connecting beam plate, and a second connecting beam plate. The first connecting beam plate is located on the inner ring of the door frame curved beam 11, and its groove 113 can limit the window glass 16. The second connecting beam plate is located on the outer ring of the door frame curved beam 11, and its limiting protrusion 114 cooperates with the outer door sealing strip 141 for sealing.

[0062] Because the aforementioned door frame is made of aluminum alloy profiles, it significantly reduces the weight of the door, achieving lightweight construction. Furthermore, the processing of aluminum alloy profiles is simpler and more efficient. Using extruded aluminum alloy profiles, the mold investment cost is basically controlled at around 200,000 yuan, compared to the 3 million yuan cost required for traditional stamping sheet metal molds, greatly saving on door production mold costs. In addition, in terms of efficiency, the development cycle for aluminum alloy extrusion profile molds is approximately 25 days, while the development cycle for traditional stamping sheet metal molds is approximately 90 days. Therefore, the technical solution of this invention can also significantly shorten the production cycle.

[0063] The aforementioned door frame is manufactured by bending and welding aluminum alloy profiles, and then assembled with some stamped parts to form a complete door structure.

[0064] This invention guides the design of the car door frame through six cross-sectional views, and the above solution can be implemented in actual manufacturing using the following parameters:

[0065] Depend on Figures 5 to 6 It is known that the interior door panel 15 is installed on the door, interfering with the door frame curved beam 11 by 0.3mm to ensure that the interior door panel 15 can be pressed tightly against the door. The exterior door panel 14 is bonded to the door frame curved beam 11, with a 0.5mm adhesive gap between the exterior door panel 14 and the door frame curved beam 11. The corner plate sealing strip 241 is fixed to the corner plate 24 by clips, with a 6.2mm gap between the corner plate 24 and the door frame curved beam 11. The corner plate sealing strip 241 interferes with the door frame curved beam 11 by 5.6mm to ensure that the sealing strip is pressed tightly. Figure 9 It can be seen that the interior door panel 15 is installed on the inner window sill beam 12, the inner door water cutter 151 is installed on the interior door panel 15, and the outer door panel 14 is bonded to the outer door crossbeam 13, leaving a 0.5mm glue gap; the headliner panel 25 is pressed against the inside of the door opening sealing strip 21 to ensure the aesthetics of the door; by Figure 8 It can be seen that the door lock 17 is installed on the curved beam 11 of the door frame, according to Figure 8 The height of the door lock 17 can be determined by its height; Figure 7 It is understood that the sill strip presses onto the door opening sealing strip 21 to ensure the aesthetics of the vehicle interior. The sill strip is fixed with screws, and a groove is cut above the screw at the sill strip to fix the cover, further ensuring the aesthetics of the vehicle interior and thus improving the sense of quality. The door frame curved beam 11 has a thickness of 2.5mm, the outer door panel 14 has a thickness of 1.5-2.5mm, preferably 2.5mm, the hinge reinforcement plate 115 has a thickness of 1.5-2mm, preferably 2mm, the inner window sill beam 12 has a thickness of 1-2mm, preferably 1mm, and the outer door crossbeam 13 has a thickness of 1-2mm, preferably 1mm. The window glass 16 uses laminated glass with a thickness of 6.76mm. The cross-sections of other accessories and interior parts are processed according to actual processing requirements.

[0066] The parameters implemented in the actual processing described above are only the preferred parameters in this embodiment. It is feasible to reasonably increase or decrease the above parameters as needed to meet actual requirements.

[0067] Furthermore, this invention also provides a method for processing an aluminum alloy profile car door frame, used to process the aforementioned aluminum alloy profile car door frame, the processing steps including:

[0068] S100: By heating the aluminum alloy blank and extruding it through different molds, aluminum alloy profiles required for preparing the door frame curved beam 11, the inner window sill beam 12 and the outer door crossbeam 13 are obtained, namely profile a, profile b and profile c.

[0069] Due to the different molds used in the processing, profiles a, b, and c have different cross-sectional structures. For details, please refer to... Figures 1 to 9 Furthermore, when profile a has sufficient strength, the bent door frame beam 11 formed by its bending also has a lighter weight. Similarly, the use of profiles b and c also makes the weight of the fixed part of the window glass 16 lighter to a certain extent. Therefore, the processed door frame has the characteristics of lightweight. On the other hand, since the mold cost for profile processing is lower and the production cycle is shorter, low-cost and high-efficiency production characteristics are also achieved.

[0070] S200: The profile a is bent so that it bends toward the first connecting beam plate and bends it into a closed structure to obtain a door frame beam 11 with a door outer frame structure.

[0071] When profile a bends towards the first connecting beam, the mud groove 113 is located inside the door frame curved beam 11, thereby limiting the movement of the window glass 16. Since the bending is performed towards the first connecting beam, in this embodiment, it is preferable that the thickness of the inner beam 111 and the outer beam 112 in profile a is consistent, and the thickness of the first connecting beam is less than the thickness of the inner beam 111 and / or the outer beam 112, to avoid further thickening due to compression during bending. At the same time, the thickness of the inner beam 111 and / or the outer beam 112 is less than the thickness of the second connecting beam, to avoid the second connecting beam being too thin due to stretching. The above settings ensure that the thickness of the door frame curved beam 11 formed by the final bending remains basically uniform at the cross-section, thereby avoiding uneven stress from affecting the strength of the door frame.

[0072] S300: Cut profiles b and c to preset dimensions to obtain the inner window sill beam 12 and the outer door crossbeam 13.

[0073] In actual production, steps S200 and S300 can be performed either by processing the door frame curved beam 11 first, or by processing the inner window sill beam 12 and the outer door crossbeam 13 first, or they can be processed simultaneously, and the order of processing is not restricted.

[0074] S400: The inner window sill beam 12 and the outer door crossbeam 13 are fixedly installed between the two side beams of the door frame curved beam 11 to obtain the door frame.

[0075] The inner window sill beam 12 and the outer door crossbeam 13 are preferably fixed to the door frame curved beam 11 by welding. Of course, in addition to welding, other methods such as bolt connection that can achieve a good fixed connection are also acceptable.

[0076] In this embodiment, step S200 further includes: during the bending process of profile a, placing the hinge reinforcing plate 115 inside profile a and fixing it to the corresponding position of the second connecting beam plate of profile a, so that after bending, its upper and lower ends are respectively located at the positions corresponding to the upper hinge 22 and lower hinge 23 of the door frame curved beam 11, so that the upper hinge 22 and lower hinge 23 are fixedly installed on the hinge reinforcing plate 115. Specifically, the hinge reinforcing plate 115 is fixed to the second connecting beam plate by riveting, and the upper hinge 22 and lower hinge 23 are preferably installed on the door frame curved beam 11 by bolts, and the nuts are welded to the hinge reinforcing plate 115 on the back by projection welding. Preferably, the hinge reinforcing plate 115 is also processed from profiles.

[0077] In addition, after step S200, step S201 is included: drilling holes in the formed door frame beam 11 to reserve installation space for the door lock 17 and other components that need to be installed on the door frame beam 11.

[0078] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. An aluminum alloy profile car door frame, characterized in that, The door frame includes: A closed-structure door frame curved beam (11) is formed by bending an aluminum alloy profile. The aluminum alloy profile has an inner beam plate (111) and an outer beam plate (112) arranged opposite to each other, as well as a first connecting beam plate and a second connecting beam plate connecting the inner beam plate (111) and the outer beam plate (112) to make the profile have a closed structure. The inner beam plate (111) is sealed with the door opening sealing strip (21), the outer beam plate (112) overlaps with the outer door panel (14), the first connecting beam plate connecting the first end of the inner beam plate (111) and the first end of the outer beam plate (112) is provided with a mud groove (113) for limiting the window glass (16), and the second connecting beam plate is provided with a limiting protrusion (114) at one end near the outer beam plate (112). The inner window sill beam (12) and the outer door crossbeam (13) are horizontally fixed between the two side beams of the door frame curved beam (11), and the inner window sill beam (12) is connected to the door interior panel (15), and the door interior water cutter (151) is installed on the door interior panel (15). The outer crossbeam (13) of the car door is connected to the outer panel (14) of the car door, and an outer water cutter (142) of the car door is installed on the outer crossbeam (13). The outer water cutter (142) of the car door and the inner water cutter (151) of the car door cooperate to limit the window glass (16). One end of the second connecting beam is connected to the inner beam (111), and the other end is connected between the first and second ends of the outer beam (112), and the second end of the outer beam (112) is bent toward the outer door panel (14); The limiting protrusion (114) includes two protrusions protruding from the second connecting beam plate. The outer door sealing strip (141) is fixedly installed on the limiting protrusion (114). A sealing element is installed at the second end of the outer beam plate (112) to ensure the sealing of the door.

2. The aluminum alloy profile car door frame according to claim 1, characterized in that, The inner window sill beam (12) has a long plate and a short plate arranged opposite to each other. The long plate is located at the upper end near the inner water cutter (151) of the car door, and the short plate is located at the lower end away from the inner water cutter (151) of the car door; as well as a connecting plate and a step plate arranged opposite to each other connecting the long plate and the short plate.

3. The aluminum alloy profile car door frame according to claim 1, characterized in that, The cross section of the outer beam (13) of the car door is trapezoidal, and the upper bottom edge of the trapezoidal structure is connected to the outer panel (14) of the car door. The lower bottom edge of the trapezoidal structure has an extension protruding from the trapezoidal structure for installing the outer water cutter (142).

4. An aluminum alloy profile car door frame according to any one of claims 1 to 3, characterized in that, The door frame curved beam (11) also includes a hinge reinforcement plate (115) fixedly installed on the second connecting beam plate, and the installation height of the hinge reinforcement plate (115) on the door frame curved beam (11) starts from the upper hinge (22) of the door and ends at the lower hinge (23).

5. An aluminum alloy profile car door frame according to any one of claims 1 to 3, characterized in that, The thickness of the first connecting beam plate is less than the thickness of the inner beam plate (111) and / or the outer beam plate (112).

6. An aluminum alloy profile car door frame according to any one of claims 1 to 3, characterized in that, The thickness of the inner beam plate (111) and / or the outer beam plate (112) is less than the thickness of the second connecting beam plate.

7. An aluminum alloy profile car door frame according to any one of claims 1 to 3, characterized in that, The door frame curved beam (11) has a mounting hole for installing the door lock (17) at the door lock (17), and the corresponding positions of the first connecting beam plate and the second connecting beam plate are provided with openings.

8. A method for processing an aluminum alloy profile car door frame, characterized in that, The method for processing aluminum alloy profile car door frames as described in any one of claims 1 to 7 includes: S100: By heating the aluminum alloy blank and extruding it through different molds, aluminum alloy profiles required for preparing the door frame curved beam (11), the inner window sill beam (12) and the outer crossbeam of the car door (13) are obtained respectively, namely profile a, profile b and profile c; S200: The profile a is bent so that the profile a is bent toward the direction of the first connecting beam plate and bent to a closed structure to obtain the door frame beam (11) with the door outer frame structure. S300: Cut profiles b and c to preset dimensions to obtain the inner window sill beam (12) and the outer door crossbeam (13). S400: The inner window sill beam (12) and the outer door crossbeam (13) are fixedly installed between the two side beams of the door frame curved beam (11) to obtain the door frame.

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