One-time forging forming die for automobile door hinge with three-branch-bud structure

Abstract

The utility model belongs to the technical field of dies, and relates to a one-time forging forming die for an automobile door hinge with a three-branch-bud structure. The automobile door hinge forming die comprises an automobile door hinge forming lower die and an automobile door hinge forming upper die, an alignment concave part is arranged in the automobile door hinge forming lower die, an alignment convex part is arranged in the automobile door hinge forming upper die, and the alignment concave part and the alignment convex part are arranged in a right opposite mode. A three-branch-bud structure forming material pressing piece is arranged in the automobile door hinge forming lower die, a three-branch-bud structure forming extrusion cavity part is arranged in the automobile door hinge forming upper die, and the three-branch-bud structure forming material pressing piece and the three-branch-bud structure forming extrusion cavity part correspond to each other in position and are matched with each other in shape. According to the automobile door hinge forming die, the three-branch-bud structure forming pressing part and the three-branch-bud structure forming extrusion cavity part are matched, one-time forging forming of the automobile door hinge of the three-branch-bud structure is achieved, and compared with a traditional multi-procedure forming technology, the production cycle is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a one-time forging mold for a three-branch structure automobile door hinge. Background Technology

[0002] As a key component connecting car doors, the quality and precision of automotive door hinges directly affect the performance and safety of the doors. Traditional automotive door hinge manufacturing processes often require multiple steps and molds to complete the complex structure, resulting in low production efficiency and accumulated dimensional errors from repeated processing, making it difficult to guarantee high product precision. This is especially true for automotive door hinges with a three-branch structure, where existing molding dies present significant challenges in one-time molding, failing to meet the automotive industry's demands for efficient and high-precision production. Therefore, there is an urgent need to design a one-time forging molding die for three-branch structure automotive door hinges that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a progressive die for an automotive door hinge bracket [Application No.: 201510553729.6], which includes: a machine base and a main frame set on the machine base. The main frame includes an upper die base set on the upper surface of the machine base, a lower die base set on the lower surface of the machine base, and a pressure plate. The pressure plate is set between the upper die base and the lower die base. Punching devices, first trimming devices, pressing devices, V-folding devices, straight folding devices, side punching devices, and second trimming devices are respectively set in the punching area, the first trimming area, the pressing device, the V-folding device, the straight folding device, the side punching device, and the second trimming device. However, this solution requires multiple processes in the production process, resulting in low production efficiency and large errors. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a one-time forging mold for a three-branch structure automotive door hinge.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A one-time forging die for a three-branch structure automotive door hinge includes a lower die and an upper die. The lower die has an alignment recess, and the upper die has an alignment protrusion. The alignment recess and the alignment protrusion are directly opposite each other. The lower die has a three-branch structure forming pressure piece, and the upper die has a three-branch structure forming extrusion cavity. The three-branch structure forming pressure piece and the three-branch structure forming extrusion cavity are positioned correspondingly and have matching shapes.

[0007] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the three-branch structure forming pressure material includes a pressure high boss set in the lower mold of automotive door hinge forming, and the pressure high boss has the forming texture of the lower part of the main branch.

[0008] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the lower mold for forming the automotive door hinge is also provided with a left branch pressure plate and a right branch pressure plate, which are respectively connected to the pressure plate high boss.

[0009] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the left branch pressure plate has a left branch forming lower cavity.

[0010] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the right branch pressure plate has a right branch forming lower cavity.

[0011] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the three-branch structure forming extrusion cavity includes a main branch corresponding mold cavity disposed in the upper mold of automotive door hinge forming. The main branch corresponding mold cavity is positioned and matched with the high boss of the pressing material.

[0012] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the upper mold for forming the automotive door hinge is provided with a left branch forming upper cavity, and the left branch forming upper cavity is arranged opposite to the left branch forming lower cavity.

[0013] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the upper mold for forming the automotive door hinge is provided with a right branch upper cavity, which is directly opposite to the right branch forming lower cavity, and the left branch forming upper cavity and the right branch upper cavity are respectively connected to the corresponding mold cavity of the main branch.

[0014] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the alignment recess includes several alignment grooves provided in the upper mold of automotive door hinge forming.

[0015] In the above-mentioned three-branch structure automotive door hinge one-time forging mold, the alignment protrusion includes a plurality of alignment protrusions disposed in the upper mold of automotive door hinge forming.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model achieves one-time forging of a three-branch structure automotive door hinge by combining a three-branch structure forming pressing part and a three-branch structure forming extrusion cavity. Compared with the traditional multi-process forming process, it greatly shortens the production cycle and improves production efficiency.

[0018] 2. This utility model, through the design of the alignment recess and alignment protrusion, and the precise matching of each forming component, ensures the accurate positioning of the mold during mold closing and forging processes, effectively reducing dimensional errors and improving the precision and consistency of the product.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the lower mold for forming automotive door hinges.

[0022] Figure 3 This is a schematic diagram of the upper mold for forming automotive door hinges.

[0023] In the diagram: 1. Lower mold for forming car door hinges; 2. Upper mold for forming car door hinges; 3. Alignment recess; 4. Alignment protrusion; 5. Three-branch structure forming pressure piece; 6. Three-branch structure forming extrusion cavity; 7. Pressure plate high boss; 8. Main branch lower forming texture; 9. Left branch pressure plate; 10. Right branch pressure plate; 11. Left branch forming lower cavity; 12. Right branch forming lower cavity; 13. Main branch corresponding mold cavity; 14. Left branch forming upper cavity; 15. Right branch upper cavity; 16. Alignment groove; 17. Alignment protrusion. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-3 As shown, a one-time forging mold for a three-branch structure automotive door hinge includes a lower mold 1 and an upper mold 2 for forming the automotive door hinge. The lower mold 1 has an alignment recess 3, and the upper mold 2 has an alignment protrusion 4. The alignment recess 3 and the alignment protrusion 4 are directly opposite each other. The lower mold 1 is provided with a three-branch structure forming pressure piece 5, and the upper mold 2 is provided with a three-branch structure forming extrusion cavity 6. The three-branch structure forming pressure piece 5 and the three-branch structure forming extrusion cavity 6 are positioned correspondingly and have matching shapes.

[0026] In this embodiment, before the forging operation begins, the blank to be processed is placed on the three-branch structure forming pressure piece 5 of the lower die 1 for forming automotive door hinges. When the forging equipment is started, the upper die 2 for forming automotive door hinges moves downwards. When preparing to close the die, the alignment protrusion 4 of the upper die 2 for forming automotive door hinges will accurately embed into the alignment recess 3 of the lower die 1 for forming automotive door hinges. This process achieves precise positioning of the upper and lower dies in the horizontal and vertical directions. As the upper die 2 continues to descend, the three-branch structure forming extrusion cavity 6 gradually approaches and cooperates with the three-branch structure forming pressure piece 5, tightly clamping the blank between the two parts. Between the two, the blank undergoes plastic deformation through extrusion force, thereby achieving one-time forming of the three-branch structure automotive door hinge. The precise positioning design ensures that the relative positions of the upper and lower dies are accurate in each mold closing process, greatly reducing product size deviations caused by mold misalignment and improving product forming accuracy. In addition, the precise cooperation between the three-branch structure forming pressure piece 5 and the three-branch structure forming extrusion cavity 6 allows the blank to complete the complex three-branch structure forming in one forging process. Compared with traditional multi-process processing, this significantly shortens the production cycle and greatly improves production efficiency.

[0027] Combination Figure 1 , Figure 2 As shown, the three-branch structure forming pressing part 5 includes a pressing high boss 7 disposed in the lower mold 1 for forming automobile door hinges, and the pressing high boss 7 has a main branch lower forming texture 8.

[0028] Specifically, when placing the billet, the lower part of the main branch of the billet is closely fitted with the high protrusion 7 of the pressure plate. The high protrusion 7 of the pressure plate plays a supporting and initial positioning role for the billet. The forming pattern 8 of the lower part of the main branch is in contact with the billet. In the early stage of forging, the pattern will leave a preliminary shape imprint on the billet, which provides a basis for the precise forming of the main branch of the billet by the extrusion cavity 6 of the three-branch structure. The high protrusion 7 of the pressure plate can stably support the billet and prevent the billet from shifting during the forging process, thus ensuring the stability of the forging process. The forming pattern 8 of the lower part of the main branch shapes the lower part of the main branch of the billet in advance, reducing the difficulty of subsequent forming, helping to improve the accuracy of the main branch forming and ensuring product quality.

[0029] Combination Figure 1 , Figure 2 As shown, the lower mold 1 for forming the car door hinge is also provided with a left branch pressing platform 9 and a right branch pressing platform 10, which are respectively connected to the pressing high boss 7.

[0030] In this embodiment, the left branch pressure table 9 and the right branch pressure table 10, together with the pressure plate 7, form an integrated billet support and positioning platform. When placing the billet, the left and right branches of the billet are placed on the left branch pressure table 9 and the right branch pressure table 10 respectively. In this way, the billet is comprehensively positioned, ensuring that each part of the billet is accurately positioned. Since the left branch pressure table 9 and the right branch pressure table 10 are connected to the pressure plate 7, they can work together to apply force to the billet during the forging process, ensuring that the billet is subjected to uniform force. This design further improves the billet positioning system, ensuring that the billet is in a precise position before forging, providing a guarantee for subsequent precise forming. At the same time, by working together on the billet, the billet is subjected to uniform force during the forging process, avoiding product deformation or defects caused by uneven force, and improving product quality and consistency.

[0031] The left branch pressing platform 9 has a left branch forming lower cavity 11, and the right branch pressing platform 10 has a right branch forming lower cavity 12.

[0032] In this embodiment, when the billet is placed on the left branch pressing table 9, the left branch portion of the billet is embedded in the left branch forming lower cavity 11. During the forging process, the left branch forming upper cavity 14 of the automotive door hinge forming upper die 2 moves downward, cooperating with the left branch forming lower cavity 11 to extrude and form the left branch portion of the billet. The left branch forming lower cavity 11 and the left branch forming upper cavity 14 together restrict the deformation direction and range of the left branch of the billet, so that it gradually forms a left branch shape that meets the design requirements. Similar to the forming process of the left branch, the right branch portion of the billet is embedded in the right branch forming lower cavity 12 when placed. During the forging process, the right branch upper cavity 15 of the automotive door hinge forming upper die 2 moves downward, cooperating with the right branch forming lower cavity 12 to extrude and form the left branch portion of the billet. The lower cavity 12 works in conjunction with each other to extrude and form the right branch of the billet. The right branch forming lower cavity 12 and the right branch upper cavity 15 work together to ensure that the right branch of the billet deforms according to the design shape. The left branch forming lower cavity 11 provides a precise cavity for the forming of the left branch of the billet, which can guide the billet to deform according to the predetermined shape, which helps to improve the accuracy and quality of the left branch forming and reduce the product scrap rate caused by inaccurate forming. The presence of the right branch forming lower cavity 12 provides precise constraints for the forming of the right branch of the billet, ensuring the forming accuracy of the right branch. Together with the left branch forming lower cavity 11, it achieves the precise forming of the entire three-branch structure and improves the overall quality of the product.

[0033] The three-branch structure forming extrusion cavity 6 includes a main branch corresponding mold cavity 13 disposed in the upper mold 2 for forming automobile door hinges. The main branch corresponding mold cavity 13 is positioned and matched with the high protrusion 7 for pressing material.

[0034] In this embodiment, during the mold closing process, as the upper mold 2 for forming the car door hinge moves downward, the main branch corresponding mold cavity 13 gradually approaches and covers the pressing high boss 7. At this time, the main branch of the blank placed on the pressing high boss 7 is clamped by the main branch corresponding mold cavity 13 and the pressing high boss 7. Through the mutual squeezing action of the two, the main branch of the blank undergoes plastic deformation according to the shape of the main branch corresponding mold cavity 13 and the pressing high boss 7, completing the forming process of the main branch. The precise fit between the main branch corresponding mold cavity 13 and the pressing high boss 7 ensures the high precision of the main branch forming, guarantees that the size and shape of the main branch of the car door hinge meet the design requirements, and improves the quality and reliability of the product.

[0035] The upper mold 2 for forming the car door hinge is provided with a left branch forming upper cavity 14, which is directly opposite to the left branch forming lower cavity 11.

[0036] In this embodiment, during mold closing, the left branch forming upper cavity 14 moves downward with the automotive door hinge forming upper mold 2, accurately aligning with the left branch forming lower cavity 11. When the two are close together, the left branch portion of the blank placed in the left branch forming lower cavity 11 is clamped by the left branch forming upper cavity 14 and the left branch forming lower cavity 11. Through extrusion, the left branch of the blank gradually takes shape. Since the two are aligned, it can be ensured that the left branch of the blank is subjected to uniform force and consistent deformation during the extrusion process. The alignment of the left branch forming upper cavity 14 and the left branch forming lower cavity 11 makes the forming process of the left branch more stable, improves the accuracy and consistency of the left branch forming, and reduces product defects caused by uneven force during the forming process.

[0037] Combination Figure 3 As shown, the upper mold 2 for forming the car door hinge has a right branch upper cavity 15, which is directly opposite to the lower mold cavity 12 for forming the right branch. The upper mold cavity 14 for forming the left branch and the upper mold cavity 15 for forming the right branch are respectively connected to the corresponding mold cavity 13 of the main branch.

[0038] In this embodiment, during the mold closing process, the right branch upper cavity 15 moves downward with the upper mold 2 for forming the car door hinge, facing the right branch lower cavity 12 and extruding and forming the right branch of the billet. The process is similar to that of the left branch forming. At the same time, since the left branch upper cavity 14 and the right branch upper cavity 15 are respectively connected to the corresponding mold cavity 13 of the main branch, the material can flow freely between the main branch, the left branch, and the right branch during the forging process. When the corresponding mold cavity 13 of the main branch extrudes the main branch of the billet, the excess material can flow to the left branch upper cavity 14 and the right branch upper cavity 15 through the connecting channel, ensuring that each part can receive sufficient material supply and achieve uniform forming. The facing arrangement of the right branch upper cavity 15 and the right branch lower cavity 12 ensures the forming accuracy of the right branch. The connection design of the left branch upper cavity 14, the right branch upper cavity 15, and the corresponding mold cavity 13 of the main branch effectively solves the problem of uneven material distribution during the forging process, avoids product defects caused by material shortage, and improves the quality and performance of the product.

[0039] Combination Figure 1 , Figure 3 As shown, the alignment recess 3 includes a plurality of alignment grooves 16 disposed in the upper mold 2 for forming the automobile door hinge.

[0040] In this embodiment, the alignment protrusion 4 of the upper mold 2 for forming the car door hinge includes several alignment protrusions 17. During the mold closing process, these alignment protrusions 17 are respectively embedded in the alignment grooves 16 of the lower mold 1 for forming the car door hinge. The cooperation of multiple alignment grooves 16 and alignment protrusions 17 positions the mold from multiple positions, further improving the accuracy and stability of the positioning. The design of multiple alignment grooves 16 increases the contact points for mold positioning, improves the stability of the mold during the mold closing process, reduces the possibility of mold shaking and displacement, and thus further ensures the molding accuracy of the product.

[0041] Combination Figure 2 As shown, the alignment protrusion 4 includes a plurality of alignment protrusions 17 disposed in the upper mold 2 for forming the automotive door hinge.

[0042] In this embodiment, during mold closing, the alignment protrusions 17 are respectively embedded in the alignment grooves 16 and closely cooperate with the alignment grooves 16 to achieve precise mold positioning. This cooperation between multiple alignment protrusions 17 and alignment grooves 16 ensures accurate alignment of the upper mold 2 and the lower mold 1 for forming the automotive door hinge in all directions. The design of several alignment protrusions 17, together with the alignment grooves 16, constitutes a stable positioning system, further enhancing the reliability of mold positioning and providing a guarantee for high-quality forging production.

[0043] The working principle of this utility model is as follows:

[0044] The pre-treated blank is placed on the three-branch structure forming pressure plate 5 of the lower die 1 for forming automotive door hinges, so that the blank is accurately positioned on the pressure plate high boss 7, the left branch pressure plate 9, and the right branch pressure plate 10. The forging equipment is started, causing the upper die 2 for forming automotive door hinges to move downwards and gradually close with the lower die 1. During the die closing process, the alignment protrusion 4 accurately engages with the alignment recess 3, achieving precise die positioning. As the upper die 2 continues to descend, the three-branch structure forming extrusion cavity 6 gradually cooperates with the three-branch structure forming pressure plate 5 to extrude and form the blank. During this process, the main branch corresponds to the die... Cavity 13 cooperates with the high boss 7 of the pressure material to compress the main branch of the car door hinge; the upper cavity 14 of the left branch forming cooperates with the lower cavity 11 of the left branch forming to compress the left branch; the upper cavity 15 of the right branch cooperates with the lower cavity 12 of the right branch forming to compress the right branch. Since the upper cavity 14 of the left branch forming and the upper cavity 15 of the right branch forming are connected to the corresponding mold cavity 13 of the main branch, the uniform flow of material in the entire three-branch structure is ensured, ensuring the forming quality of the product. After forging, the mold is opened, the formed car door hinge product is taken out, the mold is cleaned, and residual blanks and release agents are removed to prepare for the next forging.

[0045] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0046] Although this article frequently uses terms such as "lower mold for automotive door hinge forming 1," "upper mold for automotive door hinge forming 2," "alignment recess 3," "alignment protrusion 4," "three-branch structure forming pressure piece 5," "three-branch structure forming extrusion cavity 6," "pressure piece high protrusion 7," "lower forming texture of main branch 8," "left branch pressure plate 9," "right branch pressure plate 10," "left branch forming lower cavity 11," "right branch forming lower cavity 12," "corresponding mold cavity of main branch 13," "left branch forming upper cavity 14," "right branch upper cavity 15," "alignment groove 16," and "alignment protrusion 17," the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A one-time forging die for a three-branch structure automotive door hinge, comprising a lower die (1) for forming the automotive door hinge and an upper die (2) for forming the automotive door hinge, characterized in that, The lower mold (1) for forming the car door hinge has a repositioning recess (3), and the upper mold (2) for forming the car door hinge has a repositioning protrusion (4). The repositioning recess (3) and the repositioning protrusion (4) are positioned opposite each other. The lower mold (1) for forming the car door hinge is provided with a three-branch structure forming pressing part (5), and the upper mold (2) for forming the car door hinge is provided with a three-branch structure forming extrusion cavity (6). The three-branch structure forming pressing part (5) and the three-branch structure forming extrusion cavity (6) are positioned correspondingly and have matching shapes.

2. The one-time forging mold for a three-branch structure automotive door hinge according to claim 1, characterized in that, The three-branch structure forming pressing part (5) includes a pressing high boss (7) set in the lower mold (1) for forming automobile door hinges, and the pressing high boss (7) has a main branch lower forming texture (8).

3. The one-time forging mold for a three-branch structure automotive door hinge according to claim 2, characterized in that, The lower mold (1) for forming the car door hinge is also provided with a left branch pressing platform (9) and a right branch pressing platform (10), which are respectively connected to the pressing high boss (7).

4. The one-time forging mold for a three-branch structure automotive door hinge according to claim 3, characterized in that, The left branch pressing platform (9) has a left branch forming lower cavity (11).

5. The one-time forging mold for a three-branch structure automotive door hinge according to claim 4, characterized in that, The right branch pressing platform (10) has a right branch forming lower cavity (12).

6. The one-time forging mold for a three-branch structure automotive door hinge according to claim 5, characterized in that, The three-branch structure forming extrusion cavity (6) includes a main branch corresponding mold cavity (13) set in the upper mold (2) for forming automobile door hinges. The main branch corresponding mold cavity (13) is positioned and matched with the high boss (7) of the pressing material.

7. The one-time forging mold for a three-branch structure automotive door hinge according to claim 6, characterized in that, The upper mold (2) for forming the car door hinge is provided with a left branch forming upper cavity (14), and the left branch forming upper cavity (14) is arranged opposite to the left branch forming lower cavity (11).

8. The one-time forging mold for a three-branch structure automotive door hinge according to claim 7, characterized in that, The upper mold (2) for forming the car door hinge is provided with a right branch upper cavity (15), which is directly opposite to the right branch forming lower cavity (12). The left branch forming upper cavity (14) and the right branch upper cavity (15) are respectively connected to the corresponding mold cavity (13) of the main branch.

9. The one-time forging mold for a three-branch structure automotive door hinge according to claim 8, characterized in that, The alignment recess (3) includes a plurality of alignment grooves (16) disposed in the upper mold (2) for forming the automobile door hinge.

10. The one-time forging mold for a three-branch structure automotive door hinge according to claim 9, characterized in that, The alignment protrusion (4) includes a plurality of alignment protrusions (17) disposed in the upper mold (2) for forming the automobile door hinge.

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