Boss punching device for longitudinal beam of rear auxiliary frame of automobile

Abstract

The utility model relates to the technical field of automobile part manufacturing equipment, in particular to an automobile rear auxiliary frame longitudinal beam boss forming device which comprises an upper die assembly, the upper die assembly is provided with an upper die block, and a female die used for forming a boss on a longitudinal beam is installed on the upper die block. The lower die assembly is matched with the upper die assembly, the lower die assembly is provided with a longitudinal beam limiting assembly and an inner die assembly, the inner die assembly is used for being inserted into a longitudinal beam and supporting the longitudinal beam, an expanding assembly is installed in the inner die assembly, and a male die matched with the female die is installed on the inner die assembly. According to the utility model, the automobile rear subframe longitudinal beam can be quickly raised and formed, the forming efficiency of the longitudinal beam is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts manufacturing equipment, in particular to a convex platform punching device for the longitudinal beam of an automobile rear subframe. Background Art

[0002] The automobile rear subframe is an important part of the automobile chassis. It is usually located at the rear of the automobile, connecting the rear suspension system and the vehicle body, and mainly used for supporting, shock absorption, connection and protection.

[0003] The longitudinal beam and cross beam of the automobile rear subframe together form the frame structure of the subframe. The frame structure is not only used to support the weight of the vehicle, but also used to connect the suspension system, wheels, etc. The manufacturing process of the longitudinal beam of the automobile rear subframe is relatively complex. The longitudinal beam of the automobile rear subframe uses high-strength welded pipes, and there are many parts that need to be installed and connected, so the manufacturing is complex. It is mainly manufactured by means of 3D pipe cutting, bending, flattening, concaving, convexing, punching, 3D laser cutting, etc. Most of the existing longitudinal beams of automobile rear subframes use circular welded pipes to be bent and then convexed. When using a die stamping to punch a convex, it is difficult to take out the inner support die. In the traditional manufacturing process, after the die is limited in shape, high-pressure water swelling is used, but the production cost and defect rate of high-pressure water swelling are relatively high, and the efficiency is low, and the production capacity is difficult to meet the demand.

[0004] Therefore, those skilled in the art are committed to developing a convex platform punching device for the longitudinal beam of an automobile rear subframe, which is beneficial to the rapid convex forming of the longitudinal beam of the automobile rear subframe, improves the forming efficiency of the longitudinal beam and reduces the production cost. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a convex platform punching device for the longitudinal beam of an automobile rear subframe, which is beneficial to the rapid convex forming of the longitudinal beam of the automobile rear subframe, improves the forming efficiency of the longitudinal beam and reduces the production cost.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A convex platform punching device for the longitudinal beam of an automobile rear subframe, comprising

[0008] an upper die assembly, the upper die assembly has an upper die block, and a female die for punching a convex on the longitudinal beam is installed on the upper die block;

[0009] a lower die assembly, the lower die assembly cooperates with the upper die assembly, the lower die assembly has a longitudinal beam limiting assembly and an inner die assembly for inserting into the longitudinal beam and supporting the longitudinal beam, a swelling assembly is installed in the inner die assembly, and a male die cooperating with the female die is installed on the inner die assembly.

[0010] The beneficial effects of adopting the above solution are as follows: The tubular longitudinal beam is inserted outside the inner mold assembly. During the downward movement of the upper mold assembly, the expanding assembly moves inside the inner mold assembly to expand the inner mold assembly, so that the outer side of the inner mold assembly abuts against the inner wall of the longitudinal beam. The punch and the die cooperate to punch a preset boss on the longitudinal beam.

[0011] During the reset process of the upper mold assembly, the expanding assembly moves reversely inside the inner mold assembly to contract the inner mold assembly, and enables the punch to reset and slide out of the boss, which is beneficial for subsequent removal of the longitudinal beam.

[0012] Adopting a retractable inner mold assembly not only facilitates the limiting and supporting of the longitudinal beam after expansion to avoid deformation of other parts, but also facilitates the rapid removal of the longitudinal beam after contraction.

[0013] The movement of the upper mold assembly drives the movement of the expanding assembly, reducing the number of equipment components. The upper mold assembly is not only used for molding, but also used to push the expanding assembly to move inside the inner mold assembly.

[0014] On the basis of the above technical solution, the present utility model can also be improved as follows.

[0015] Further, the inner mold assembly includes at least two inner modules arranged in a circular pattern. The punch is arranged on one of the inner modules. There is a gap between adjacent two inner modules. A cavity for expansion is formed in the middle of the multiple inner modules. The expanding assembly is located in the cavity for expansion, and the expanding assembly moves in the cavity for expansion to push the multiple inner modules to approach or move away from each other.

[0016] The beneficial effects of adopting the above further solution are as follows: When the expanding assembly moves in the cavity for expansion, the multiple inner modules move away from each other. The multiple inner modules arranged in a circular pattern form a support mold for supporting the inner wall of the longitudinal beam and abut against the inner wall of the longitudinal beam. When the upper mold assembly is molded, deformation of other parts on the longitudinal beam is reduced. After molding, the multiple inner modules approach each other and are demolded from the inner wall of the longitudinal beam, which is beneficial for subsequent rapid removal of the longitudinal beam.

[0017] Further, mounting grooves are provided at corresponding positions on the multiple inner modules, and high-strength elastic rings are sleeved in the mounting grooves.

[0018] The beneficial effects of adopting the above further solution are as follows: When the upper mold assembly is reset, the multiple inner molds approach each other under the elastic force of the high-strength elastic rings and drive the expanding assembly to reset, and are demolded from the longitudinal beam, which is beneficial for subsequent rapid removal of the longitudinal beam.

[0019] Further, the expanding assembly includes an expanding tongue core. A moving assembly is connected to the end of the expanding tongue core. The expanding tongue core has an expanding boss. The expanding tongue core moves in the cavity for expansion to push the multiple inner modules to move away from each other.

[0020] The beneficial effects of adopting the above further solution are as follows: The moving component drives the expanding tongue core to move in the expanding cavity. The expanding tongue core is provided with expanding convex platforms, and the inner wall of the inner module is provided with expanding inclined surfaces that cooperate with the expanding convex platforms. The cooperation between the expanding convex platforms and the expanding inclined surfaces causes multiple inner modules to move away from each other and makes the outer wall of the inner module abut against the inner wall of the longitudinal beam to support and limit the longitudinal beam.

[0021] Further, the moving component includes a lower die wedge block, which has an inclined lower die wedge surface. A sliding hole for the movement of the expanding tongue core is provided on the lower die wedge surface, and a groove is provided on the expanding tongue core.

[0022] The upper die assembly is connected with an upper die wedge block, which has an upper die wedge surface that cooperates with the lower die wedge surface. And the upper die wedge block has an avoidance cavity for avoiding the expanding tongue core. A convex platform that cooperates with the groove is provided on the avoidance cavity. When the upper die wedge block slides along the lower die wedge surface, the convex platform abuts against the groove and pushes the expanding tongue core to slide along the sliding hole and the expanding cavity.

[0023] The beneficial effects of adopting the above further solution are as follows: When the upper die wedge block slides along the lower die wedge surface, the convex platform abuts against the groove and pushes the expanding tongue core to slide along the expanding cavity, thereby expanding and separating multiple inner modules.

[0024] Further, the longitudinal beam limiting component includes a longitudinal beam limiting block, which is provided with a longitudinal beam limiting groove, and the inner die assembly is located above the longitudinal beam limiting groove.

[0025] The beneficial effects of adopting the above further solution are as follows: The longitudinal beam limiting groove is used to quickly limit and position the longitudinal beam, which is beneficial for subsequent quick bulging and improves production efficiency.

[0026] Further, a positioning block for positioning the longitudinal beam is installed on the lower die assembly, and a positioning groove is provided on the positioning block.

[0027] The beneficial effects of adopting the above further solution are as follows: The positioning groove is beneficial for quickly positioning and limiting the longitudinal beam.

[0028] Further, a limiting block for limiting the longitudinal beam is installed on the lower die assembly, a limiting rod is installed on the limiting block, and the end of the limiting rod abuts against the side wall of the longitudinal beam.

[0029] The beneficial effects of adopting the above further solution are as follows: The limiting rod reduces the horizontal deformation during die pressing.

[0030] Further, a guiding sleeve is installed on the upper die assembly, and a guiding rod that cooperates with the guiding sleeve is installed on the lower die assembly.

[0031] The beneficial effects of adopting the above further solution are as follows: The cooperation between the guiding sleeve and the guiding rod enables the upper die assembly and the lower die assembly to move directionally.

[0032] Further, an upper limit post is installed on the upper die assembly, and a lower limit post cooperating with the upper limit post is installed on the lower die assembly.

[0033] The beneficial effects of adopting the above further solution are as follows: The cooperation between the upper limit post and the lower limit post is used to adjust the downward movement distance of the upper die assembly during die pressing. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of a specific embodiment of the present invention;

[0035] Figure 2 It is a schematic structural diagram of the lower die assembly of a specific embodiment of the present invention Figure 1 ;

[0036] Figure 3 It is a schematic structural diagram of the lower die assembly of a specific embodiment of the present invention Figure 2 ;

[0037] Figure 4 It is a schematic structural diagram of the upper die assembly of a specific embodiment of the present invention;

[0038] Figure 5 It is a schematic structural diagram of the inner die assembly and the bulging assembly of a specific embodiment of the present invention.

[0039] In the drawings, the list of components represented by each reference numeral is as follows:

[0040] 1. Upper die assembly; 2. Upper die block; 3. Longitudinal beam; 4. Female die; 5. Lower die assembly; 6. Longitudinal beam limit assembly; 7. Inner die assembly; 8. Bulging assembly; 9. Male die; 10. Inner module; 11. Bulging cavity; 12. Installation groove; 13. Bulging tongue core; 14. Bulging boss; 15. Lower die wedge block; 16. Lower die wedge surface; 17. Groove; 18. Upper die wedge block; 19. Upper die wedge surface; 20. Longitudinal beam limit block; 21. Longitudinal beam limit groove; 22. Positioning block; 23. Positioning groove; 24. Limit block; 25. Limit rod; 26. Guide rod; 27. Upper limit post; 28. Lower limit post; 29. Avoidance cavity. Detailed Embodiments

[0041] The principles and features of the present invention will be described below with reference to the drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the system or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0043] In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0045] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, a device for punching bosses on the longitudinal beam of an automotive rear subframe mainly uses the manufacturing device of this embodiment for:

[0046] 1. Studying the deformation condition of the pipe fitting after bending and stamping;

[0047] 2. Studying the springback law of the pipe fitting after bending and stamping;

[0048] 3. Studying the die process and structure for punching holes in the pipe fitting without a female die;

[0049] 4. Studying the internal expansion forming process and structure of the boss on the pipe fitting through a stamping wedge.

[0050] The device for punching bosses on the longitudinal beam of an automotive rear subframe includes:

[0051] The upper die assembly 1, the upper die assembly 1 has an upper die block 2, and a female die 4 for punching bosses on the longitudinal beam 3 is installed on the upper die block 2;

[0052] The lower die assembly 5 cooperates with the upper die assembly 1. The lower die assembly 5 has a longitudinal beam limiting assembly 6 and an inner die assembly 7 for inserting into the longitudinal beam and supporting the longitudinal beam 3. A swelling assembly 8 is installed inside the inner die assembly 7, and a punch 9 cooperating with the female die 4 is installed on the inner die assembly 7.

[0053] In the present utility model, the tubular longitudinal beam 3 is inserted outside the inner die assembly 7. During the downward movement of the upper die assembly 1, the swelling assembly 8 moves inside the inner die assembly 7 to expand the inner die assembly 7, so that the outer side of the inner die assembly 7 abuts against the inner wall of the longitudinal beam 3. The punch 9 and the female die 4 cooperate to punch a preset boss on the longitudinal beam 3. At this time, the punch 9 is located inside the punched boss, and the longitudinal beam 3 cannot be directly pulled out. During the reset process of the upper die assembly 1, the swelling assembly 8 moves reversely inside the inner die assembly 7 to contract the inner die assembly 7, and the punch 9 is reset and slides out of the boss, which is beneficial to taking out the longitudinal beam 3 subsequently.

[0054] As Figure 2 , Figure 3 and Figure 5 shown, in some embodiments, the inner die assembly 7 includes at least two inner die blocks 10 arranged in a circumferential manner. In a specific embodiment, four inner die blocks 10 arranged in a circumferential manner are provided. The punch 9 is arranged on one of the inner die blocks 10 and vertically upward. There is a gap between adjacent two inner die blocks 10. A swelling cavity 11 is formed in the middle of the plurality of inner die blocks 10. The swelling assembly 8 is located in the swelling cavity 11. The swelling assembly 8 moves in the swelling cavity 11 to push the plurality of inner die blocks 10 to approach or move away from each other. A limiting platform for limiting the horizontal position of the longitudinal beam 3 is also installed on the inner die blocks 10.

[0055] The swelling assembly 8 includes a swelling tongue core 13. A moving assembly is connected to the end of the swelling tongue core 13. The swelling tongue core 13 has a swelling boss 14. A swelling inclined surface cooperating with the swelling boss 14 is arranged on the inner wall of the inner die block 10. The swelling boss 14 cooperates with the swelling inclined surface, so that the swelling tongue core 13 moves in the swelling cavity 11 to push the plurality of inner die blocks 10 to move away from each other.

[0056] In some embodiments, the moving assembly includes a telescopic cylinder. The output end of the telescopic cylinder is connected to the end of the swelling tongue core 13. The movement of the output end of the telescopic cylinder drives the swelling tongue core 13 to move in the swelling cavity 11 to expand the plurality of inner die blocks 10. A plurality of installation grooves 12 are arranged at corresponding positions on the plurality of inner die blocks 10 at intervals. High-strength elastic rings are sleeved in the installation grooves 12. After the telescopic cylinder retracts, the plurality of inner die blocks 10 are reset under the elastic force of the high-strength elastic rings, which is beneficial to taking out the longitudinal beam 3 subsequently.

[0057] As Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in some embodiments, the moving component includes a lower die wedge block 15, the lower die wedge block 15 has an inclined lower die wedge surface 16, a sliding hole for the movement of the expanding tongue core 13 is provided on the lower die wedge surface 16, the sliding hole extends into the lower die wedge block 15, and a groove 17 is provided on the expanding tongue core 13.

[0058] The upper die assembly 1 is connected with an upper die wedge block 18, the upper die wedge block 18 has an upper die wedge surface 19 that cooperates with the lower die wedge surface 16, and the upper die wedge block 18 has an avoidance cavity 29 for avoiding the expanding tongue core 13, a boss (not shown in the figure) that cooperates with the groove 17 is provided on the avoidance cavity 29. When the upper die wedge block 18 slides along the lower die wedge surface 16, the boss abuts against the groove 17 and pushes the expanding tongue core 13 to slide along the sliding hole and the expanding cavity 11, so as to expand multiple inner modules 10. When the upper die assembly 1 resets, it drives the upper die wedge block 18 to reset, and the multiple inner modules 10 reset under the elastic force of the high-strength elastic ring, which is beneficial for subsequently taking out the longitudinal beam 3.

[0059] As Figure 1 、 Figure 2 and Figure 3 shown, in one embodiment, the longitudinal beam limiting assembly 6 includes a longitudinal beam limiting block 20, a longitudinal beam limiting groove 21 is provided on the longitudinal beam limiting block 20, the inner wall of the longitudinal beam limiting groove 21 fits with the outer wall of the longitudinal beam 3, and the inner die assembly 7 is located above the longitudinal beam limiting groove 21.

[0060] A positioning block 22 for positioning the longitudinal beam 3 is installed on the lower die assembly 5, a positioning groove 23 is provided on the positioning block 22, and the positioning groove 23 is longitudinally arranged. In other embodiments, a limiting block 24 for limiting the longitudinal beam 3 is installed on the lower die assembly 5, the limiting block 24 is located on the side wall of the inner die assembly 7, a limiting rod 25 is installed on the limiting block 24, and the end of the limiting rod 25 abuts against the side wall of the longitudinal beam 3.

[0061] A guide sleeve is installed on the upper die assembly 1, and a guide rod 26 that cooperates with the guide sleeve is installed on the lower die assembly 5. An upper limit column 27 is also installed on the upper die assembly 1, and a lower limit column 28 that cooperates with the upper limit column 27 is installed on the lower die assembly 5. The upper limit column 27 and the lower limit column 28 cooperate to adjust the downward movement distance of the upper die assembly 1 during molding.

[0062] By using the above-mentioned device for punching bosses on the longitudinal beam of the automotive rear subframe, after the longitudinal beam of the automotive rear subframe is quickly punched and formed, the thinning rate of the welded pipe is controlled at a low level. At the same time, the profile accuracy of the welded lap joint surface and the bent pipe surface is maintained within the preset range, the position accuracy of the positioning holes meets the set requirements, the tolerance of the flattened size is maintained within a reasonable error range, and the tolerance of the punching height is also controlled within an appropriate dimensional accuracy, meeting the manufacturing requirements of the automotive rear subframe.

[0063] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An apparatus for embossing a boss on a longitudinal beam of an automotive rear subframe, characterized in that: including an upper die assembly (1), the upper die assembly (1) having an upper die block (2) on which a female die (4) for embossing a longitudinal beam (3) is mounted; a lower die assembly (5), the lower die assembly (5) cooperating with the upper die assembly (1), the lower die assembly (5) having a longitudinal beam limiting assembly (6) and an inner die assembly (7) for inserting into the longitudinal beam (3) and supporting the longitudinal beam (3), a swelling assembly (8) being mounted inside the inner die assembly (7), and a male die (9) cooperating with the female die (4) being mounted on the inner die assembly (7).

2. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 1, wherein: The inner die assembly (7) includes at least two inner die blocks (10) arranged in a circumferential manner, the male die (9) being disposed on one of the inner die blocks (10), there being a gap between adjacent two of the inner die blocks (10), a swelling cavity (11) being formed in the middle of the plurality of inner die blocks (10), the swelling assembly (8) being located inside the swelling cavity (11), and the swelling assembly (8) moving inside the swelling cavity (11) to push the plurality of inner die blocks (10) to approach or move away from each other.

3. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 2, characterized in that: Mounting grooves (12) are provided at corresponding positions on the plurality of inner die blocks (10), and high-strength elastic rings are sleeved inside the mounting grooves (12).

4. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 2, wherein: The swelling assembly (8) includes a swelling tongue core (13), a moving assembly being connected to the end of the swelling tongue core (13), the swelling tongue core (13) having a swelling boss (14), and the swelling tongue core (13) moving inside the swelling cavity (11) to push the plurality of inner die blocks (10) to move away from each other.

5. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 4, characterized in that: The moving assembly includes a lower die wedge block (15), the lower die wedge block (15) having an inclined lower die wedge surface (16), a sliding hole for the movement of the swelling tongue core (13) being provided on the lower die wedge surface (16), and a groove (17) being provided on the swelling tongue core (13); The upper die assembly (1) is connected with an upper die wedge block (18), the upper die wedge block (18) having an upper die wedge surface (19) cooperating with the lower die wedge surface (16), and an avoidance cavity (29) for avoiding the swelling tongue core (13) being provided on the upper die wedge block (18), a boss cooperating with the groove (17) being provided on the avoidance cavity (29), and when the upper die wedge block (18) slides along the lower die wedge surface (16), the boss abuts against the groove (17) and pushes the swelling tongue core (13) to slide along the sliding hole and the swelling cavity (11).

6. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 1, wherein: The longitudinal beam limiting assembly (6) includes a longitudinal beam limiting block (20), a longitudinal beam limiting groove (21) being provided on the longitudinal beam limiting block (20), and the inner die assembly (7) being located above the longitudinal beam limiting groove (21).

7. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 1, characterized in that: A positioning block (22) for positioning the longitudinal beam (3) is mounted on the lower die assembly (5), and a positioning groove (23) is provided on the positioning block (22).

8. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 1, characterized in that: A limiting block (24) for limiting the longitudinal beam (3) is installed on the lower die assembly (5). A limiting rod (25) is installed on the limiting block (24), and the end of the limiting rod (25) abuts against the side wall of the longitudinal beam (3).

9. The convex platform forming device for the longitudinal beam of the rear subframe of an automobile according to claim 1, characterized in that: A guiding sleeve is installed on the upper die assembly (1), and a guiding rod (26) matched with the guiding sleeve is installed on the lower die assembly (5).

10. The convex platform device for the longitudinal beam of the rear subframe of an automobile according to claim 1, characterized in that: An upper limiting column (27) is installed on the upper die assembly (1), and a lower limiting column (28) matched with the upper limiting column (27) is installed on the lower die assembly (5).

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