A one-step forming die for a precise metal piece of an automobile

Abstract

This application relates to the field of automotive parts manufacturing technology and discloses a one-time forming mold for precision automotive metal parts, including a base, a lower mold base at the top of the base, a lower mold core at the top of the lower mold base, and a cavity inside the lower mold core. This one-time forming mold for precision automotive metal parts, through the operation of a temperature control circulation mechanism, coordinates with a first circulation pipe group and a second circulation pipe group to circulate coolant into the first and second temperature control pipe groups. This allows the first and second temperature control pipe groups to cool the cavity of the lower mold core and the punch of the upper mold core, achieving temperature control of the mold. During friction between the mold and the metal part, the mold is cooled to a certain extent, controlling the temperature change between the mold and the metal part. This prevents large temperature differences in the metal part during forming, which could lead to uneven deformation and improve the quality of the formed metal part.

Description

Technical Field

[0001] This application relates to the field of automotive parts manufacturing technology, specifically a one-time forming mold for precision metal parts for automobiles. Background Technology

[0002] In the automotive manufacturing industry, the machining of precision metal parts is a crucial step in ensuring the performance and safety of the entire vehicle. With the trend towards lightweight and high-performance vehicles, higher demands are placed on the precision, strength, and surface quality of metal parts. Traditional metal part machining typically involves multiple processes, including casting, forging, and machining, which not only increases production cycles but can also lead to dimensional errors and surface defects. In recent years, one-piece molding technology has gradually become a research hotspot. It achieves the manufacturing of complex shapes and high-precision metal parts through a single molding process, offering advantages such as high efficiency and low cost. However, existing one-piece molding technologies still face many challenges in mold design, material selection, and process control, making it difficult to fully meet the high standards required by the automotive industry for precision metal parts.

[0003] In the existing technology, when forming metal parts using a mold, the friction between the mold and the metal part can cause localized heating. Large temperature differences can lead to uneven deformation, generating residual stress and affecting the fatigue life of the workpiece. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a one-time forming mold for precision metal parts in automobiles. This mold features temperature control, allowing for cooling of the mold during friction between the mold and the metal part. This control of temperature changes between the mold and the metal part prevents uneven deformation due to large temperature differences during forming, thus improving the quality of the formed metal part. This solution addresses the problems in existing technologies where friction between the mold and the metal part leads to localized heating, large temperature differences cause uneven deformation, generate residual stress, and affect the fatigue life of the workpiece.

[0005] To achieve the aforementioned goal of controlling the temperature of the mold, cooling the mold to a certain extent during friction between the mold and the metal part, controlling the temperature change between the mold and the metal part, preventing large temperature differences in the metal part during the forming process that could lead to uneven deformation, and improving the quality of the metal part forming, this application provides the following technical solution: A one-time forming mold for precision automotive metal parts, comprising a base, a lower mold base at the top of the base, a lower mold core at the top of the lower mold base, a cavity inside the lower mold core, an upper mold core above the lower mold core, and the upper mold core located at the bottom of the upper mold base. The upper mold base is disposed at one end of the first hydraulic rod, and the other end of the first hydraulic rod is disposed at the top of the base through a support frame. A punch is disposed at the bottom of the upper mold core, and the shape of the punch is adapted to the shape of the cavity. A guide post is disposed on the side of the lower mold base through a support plate. The guide post is inserted into the inner wall of the middle part of the guide sleeve. The guide sleeve is disposed on the side of the upper mold base. A first temperature control tube group is disposed inside the upper mold core. A second temperature control tube group is disposed inside the punch. The first temperature control tube group is connected to the temperature control circulation mechanism through a first circulation tube group. The second temperature control tube group is connected to the temperature control circulation mechanism through a second circulation tube group.

[0006] Through the above scheme, the temperature control circulation mechanism works in conjunction with the first and second circulation pipe groups to circulate coolant into the first and second temperature control pipe groups. This allows the first and second temperature control pipe groups to cool the cavity of the lower mold core and the punch of the upper mold core, thereby achieving temperature control of the mold. When the mold rubs against the metal part, it cools the mold to a certain extent, controlling the temperature change between the mold and the metal part. This prevents large temperature differences in the metal part during the forming process, which could lead to uneven deformation and improve the quality of the metal part forming.

[0007] Furthermore, the shape and size of the first temperature control tube assembly are adapted to the shape of the cavity, and the distance between each pipe of the first temperature control tube assembly and the corresponding inner wall of the cavity is set to be equal.

[0008] The above scheme enables the first temperature control tube group to uniformly cool all parts of the cavity wall, thereby ensuring that the cavity maintains a uniform temperature field distribution during the metal part forming process, avoiding the problem of inconsistent temperature in different parts of the metal part caused by local temperature differences, and significantly improving the forming accuracy and surface quality of the metal part.

[0009] Furthermore, the shape and size of the second temperature control tube assembly are adapted to the shape of the punch, and the distance between each pipe of the second temperature control tube assembly and the corresponding outer surface of the punch is set to be equal.

[0010] The above scheme enables the second temperature control tube group to uniformly cool all parts of the outer surface of the punch, thereby ensuring that the punch maintains a uniform temperature field distribution during the metal part forming process, avoiding the problem of inconsistent temperature in different parts of the metal part caused by local temperature differences, and significantly improving the forming accuracy and surface quality of the metal part in conjunction with the first temperature control tube group and the cavity.

[0011] Furthermore, the second circulation tube assembly is provided with a deformable flexible tube.

[0012] The above solution, through the setting of the deformable hose of the second circulation pipe group, can adapt to the lifting and lowering movement of the upper mold core during the mold closing and opening process, which not only ensures the reliable connection between the second circulation pipe group and the second temperature control pipe group, but also avoids pipe damage caused by the lifting and lowering movement of the upper mold core, thereby improving the overall reliability of the equipment.

[0013] Furthermore, a positioning frame is provided on the top of the lower mold core, and the shape and size of the positioning frame are adapted to the shape and size of the metal blank.

[0014] The above method enables precise pre-positioning of metal blanks, preventing incomplete forming of metal parts due to inaccurate placement of the blanks during the forming process, thus improving the quality of metal part forming.

[0015] Furthermore, a pressure frame is provided above the lower mold core, and the top of the pressure frame is fixedly connected to one end of the second hydraulic rod through a fixing bracket. The other end of the second hydraulic rod is set on the side of the lower mold core through a support plate.

[0016] The above scheme uses a second hydraulic rod in conjunction with a holding frame to hold and position the metal blank before mold closing, ensuring the stability of the metal blank before mold closing.

[0017] Furthermore, the lower mold core is provided with multiple telescopic rods inside, the cavity of the telescopic rod is connected to the inside of the mold cavity, one end of the telescopic rod is provided with a push plate, the shape of the push plate is adapted to the shape of the corresponding position of the mold cavity, and a spring is provided inside the telescopic rod, one end of the spring is provided at one end of the inner wall of the telescopic rod outer tube, and the other end of the spring is provided at one end of the telescopic rod inner tube.

[0018] The above scheme uses a spring to push the push plate upward with the telescopic rod, which in turn pushes the molded metal part upward from the cavity. Combined with the contour design of the push plate, stress-free demolding of the molded part is achieved.

[0019] Furthermore, the multiple telescopic rods and push plates are positioned below the main stress points of the metal component.

[0020] The above solution allows the push plate to push the main stress points of the metal part upwards during the mold opening stage by using the telescopic rod in conjunction with the spring's reset action, effectively preventing workpiece deformation caused by uneven demolding force.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects: This is a one-time forming mold for precision metal parts in automobiles. Through the operation of a temperature control circulation mechanism, in conjunction with the first and second circulation pipe groups, coolant is injected into the first and second temperature control pipe groups. This allows the first and second temperature control pipe groups to cool the cavity of the lower mold core and the punch of the upper mold core, achieving temperature control of the mold. When the mold rubs against the metal part, it cools the mold to a certain extent, controlling the temperature change between the mold and the metal part. This prevents large temperature differences in the metal part during the forming process, which could lead to uneven deformation and improve the quality of the metal part forming. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present application; Figure 2 This is a top view of the structure of this application; Figure 3 This is a schematic diagram of the structure on the right side of this application; Figure 4 This is a top view of the lower mold core structure of this application; Figure 5 This is a schematic diagram of the connection structure between the punch and the second temperature control tube assembly in this application; Figure 6 This is a schematic diagram of the connection structure between the lower mold core and the first temperature control tube assembly in this application; Figure 7 This is a schematic diagram of the telescopic rod and spring structure of this application.

[0023] In the picture: 1. Base; 2. Lower mold base; 3. Lower mold core; 4. Cavity; 5. Upper mold base; 6. Upper mold core; 7. Punch; 8. Guide post; 9. Guide sleeve; 10. First hydraulic rod; 11. First temperature control tube assembly; 12. Second temperature control tube assembly; 13. Temperature control circulation mechanism; 14. First circulation tube assembly; 15. Second circulation tube assembly; 16. Positioning frame; 17. Holding frame; 18. Second hydraulic rod; 19. Telescopic rod; 20. Push plate; 21. Spring. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Please see Figure 1 , Figure 5 and Figure 6 This embodiment of a one-time forming mold for precision metal parts for automobiles includes a base 1, a lower mold base 2 on the top of the base 1, a lower mold core 3 on the top of the lower mold base 2, a cavity 4 inside the lower mold core 3, an upper mold core 6 above the lower mold core 3, the upper mold core 6 being located at the bottom of an upper mold base 5, the upper mold base 5 being located at one end of a first hydraulic rod 10, the other end of the first hydraulic rod 10 being located at the top of the base 1 via a support frame, and a punch 7 at the bottom of the upper mold core 6. The shape of 7 is adapted to the shape of cavity 4. The side of the lower mold base 2 is provided with guide post 8 through the support plate. The guide post 8 is inserted into the inner wall of the middle part of the guide sleeve 9. The guide sleeve 9 is provided on the side of the upper mold base 5. The upper mold core 6 is provided with a first temperature control tube group 11. The punch 7 is provided with a second temperature control tube group 12. The first temperature control tube group 11 is connected to the temperature control circulation mechanism 13 through the first circulation tube group 14. The second temperature control tube group 12 is connected to the temperature control circulation mechanism 13 through the second circulation tube group 15.

[0026] Please see Figure 6 The shape and size of the first temperature control tube group 11 are adapted to the shape of the cavity 4. The distance between each pipe of the first temperature control tube group 11 and the corresponding inner wall of the cavity 4 is set equally, so that the first temperature control tube group 11 can uniformly cool the inner wall of the cavity 4, thereby ensuring that the cavity 4 maintains a uniform temperature field distribution during the metal part forming process, avoiding the problem of inconsistent temperature in different parts of the metal part caused by local temperature differences, and significantly improving the forming accuracy and surface quality of the metal part.

[0027] Please see Figure 5 The shape and size of the second temperature control tube group 12 are adapted to the shape of the punch 7. The distance between each pipe of the second temperature control tube group 12 and the corresponding outer surface of the punch 7 is set equally, so that the second temperature control tube group 12 can cool the outer surface of the punch 7 evenly. This ensures that the punch 7 maintains a uniform temperature field distribution during the metal part forming process, avoiding the problem of inconsistent temperature in different parts of the metal part caused by local temperature differences. Together with the first temperature control tube group 11 and the cavity 4, it significantly improves the forming accuracy and surface quality of the metal part.

[0028] Please see Figure 1 , Figure 2 and Figure 3The second circulation pipe assembly 15 is a deformable hose. The deformable hose of the second circulation pipe assembly 15 can adapt to the lifting and lowering movement of the upper mold core 6 during the mold closing and opening process. This ensures a reliable connection between the second circulation pipe assembly 15 and the second temperature control pipe assembly 12, and also avoids damage to the pipes caused by the lifting and lowering movement of the upper mold core 6, thereby improving the overall reliability of the equipment.

[0029] Please see Figure 1 , Figure 2 and Figure 4 The top of the lower mold core 3 is provided with a positioning frame 16. The shape and size of the positioning frame 16 are adapted to the shape and size of the metal blank, so as to achieve precise pre-positioning of the metal blank and prevent the metal part from being unable to be completely formed due to inaccurate placement of the blank during the forming process, thereby improving the quality of metal part forming.

[0030] Please see Figure 1 , Figure 3 and Figure 4 A holding frame 17 is provided above the lower mold core 3. The top of the holding frame 17 is fixedly connected to one end of the second hydraulic rod 18 through a fixing bracket. The other end of the second hydraulic rod 18 is set on the side of the lower mold core 3 through a support plate. Before the mold is closed, the metal blank is held and positioned by the second hydraulic rod 18 in conjunction with the holding frame 17, which ensures the stability of the metal blank before the mold is closed.

[0031] Please see Figure 1 , Figure 6 and Figure 7 The lower mold core 3 has multiple telescopic rods 19 inside. The cavity of the telescopic rod 19 is connected to the cavity 4. One end of the telescopic rod 19 is equipped with a push plate 20. The shape of the push plate 20 is adapted to the shape of the cavity 4 at the corresponding position. A spring 21 is installed inside the telescopic rod 19. One end of the spring 21 is set at one end of the inner wall of the telescopic outer tube of the telescopic rod 19, and the other end of the spring 21 is set at one end of the telescopic inner rod of the telescopic rod 19. The spring 21 can work with the telescopic rod 19 to push the push plate 20 upward, so that the push plate 20 pushes the molded metal part to move upward from the cavity 4. With the contour design of the push plate 20, stress-free demolding of the molded part can be achieved.

[0032] Please see Figure 1 , Figure 4 and Figure 6 The multiple telescopic rods 19 and push plates 20 are positioned below the main stress points of the metal parts. During the mold opening stage, the telescopic rods 19, in conjunction with the reset action of the spring 21, enable the push plates 20 to push the main stress points of the metal parts upward, effectively preventing workpiece deformation caused by uneven demolding force.

[0033] In this embodiment, a one-time forming mold for precision metal parts of automobiles utilizes a temperature control circulation mechanism 13. This mechanism, in conjunction with a first circulation pipe group 14 and a second circulation pipe group 15, circulates coolant into the first temperature control pipe group 11 and the second temperature control pipe group 12. This cools the cavity 4 of the lower mold core 3 and the punch 7 of the upper mold core 6, allowing for temperature control of the mold. This process cools the mold to a certain extent during friction between the mold and the metal part, controlling temperature changes between them and preventing uneven deformation due to large temperature differences during forming. This ultimately improves the quality of the formed metal part.

[0034] The working principle of the above embodiment is as follows: A metal blank is placed on top of the lower mold core 3 and inside the positioning frame 16. The second hydraulic rod 18 operates, driving the pressing frame 17 downwards to press and fix the metal blank on top of the lower mold core 3. The first hydraulic rod 10 operates, pushing the upper mold base 5 downwards. When the upper mold base 5 moves downwards, the guide sleeve 9 slides on the outer surface of the middle part of the guide post 8, controlling the trajectory of the upper mold base 5 and ensuring the accuracy of the mold closing between the upper mold core 6 and the lower mold core 3. When the upper mold base 5 moves downwards, it pushes the upper mold core 6 and the punch 7 downwards, causing the upper mold core 6 and the lower mold core 3 to close. The metal blank is formed under pressure by the punch 7 in conjunction with the cavity 4. While the metal part is being formed under pressure by the punch 7 and the cavity 4, the temperature control circulation mechanism 13 circulates coolant into the first temperature control pipe group 11 through the first circulation pipe group 14, causing the first temperature control pipe group 11 to circulate coolant into the inner wall of the cavity 4. The temperature is controlled by a fixed cooling range to regulate the temperature change of the cavity 4. The temperature control circulation mechanism 13 circulates coolant into the second temperature control pipe group 12 through the second circulation pipe group 15, so that the second temperature control pipe group 12 cools the outer surface of the punch 7 by a certain range of movement, thereby controlling the temperature change of the punch 7. In turn, the temperature change of the metal part is controlled by the punch 7 in conjunction with the cavity 4. When the metal blank is pressed and formed, the pressure of the punch 7 pushes the push plate 20 to move downward until the top outer surface of the push plate 20 matches the shape of the inner wall of the cavity 4, causing the telescopic rod 19 to retract and squeeze the spring 21. After the metal part is formed, the first hydraulic rod 10 drives the upper mold base 5 to move upward, so that the upper mold core 6 and the lower mold core 3 open the mold. The spring 21 gradually releases the thrust, pushes the telescopic rod 19 to extend and reset, and drives the push plate 20 to move upward. The push plate 20 pushes the metal part upward from the cavity 4 through the main force point of the metal part for demolding.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single forming die for a precision metal part of an automobile, comprising a base (1), characterized in that: The base (1) is provided with a lower mold base (2) at the top, and a lower mold core (3) is provided at the top of the lower mold base (2). A cavity (4) is opened inside the lower mold core (3). An upper mold core (6) is provided above the lower mold core (3). The upper mold core (6) is located at the bottom of the upper mold base (5). The upper mold base (5) is located at one end of the first hydraulic rod (10). The other end of the first hydraulic rod (10) is located at the top of the base (1) through a support frame. A punch (7) is provided at the bottom of the upper mold core (6). The shape of the punch (7) is similar to the shape of the cavity (4). The lower mold base (2) is provided with a guide post (8) on the side of the support plate. The guide post (8) is inserted into the inner wall of the middle part of the guide sleeve (9). The guide sleeve (9) is provided on the side of the upper mold base (5). The upper mold core (6) is provided with a first temperature control tube group (11). The punch (7) is provided with a second temperature control tube group (12). The first temperature control tube group (11) is connected to the temperature control circulation mechanism (13) through the first circulation tube group (14). The second temperature control tube group (12) is connected to the temperature control circulation mechanism (13) through the second circulation tube group (15).

2. A single-action forming die for a precision metal part of an automobile according to claim 1, characterized in that: The shape and size of the first temperature control tube group (11) are adapted to the shape of the cavity (4), and the distance between each pipe of the first temperature control tube group (11) and the corresponding inner wall of the cavity (4) is set equally.

3. A single action forming die for a precision metal part for an automobile as defined in claim 1, wherein: The shape and size of the second temperature control tube assembly (12) are adapted to the shape of the punch (7), and the distance between each pipe of the second temperature control tube assembly (12) and the corresponding outer surface of the punch (7) is set to be equal.

4. A single action forming die for a precision metal part for an automobile as defined in claim 1, wherein: The second circulation tube assembly (15) is a deformable hose.

5. A single action forming die for a precision metal part for an automobile as defined in claim 1, wherein: The lower mold core (3) is provided with a positioning frame (16) on its top, and the shape and size of the positioning frame (16) are adapted to the shape and size of the metal blank.

6. A single action forming die for a precision metal part for an automobile as defined in claim 1, wherein: A pressure frame (17) is provided above the lower mold core (3). The top of the pressure frame (17) is fixedly connected to one end of the second hydraulic rod (18) through a fixing bracket. The other end of the second hydraulic rod (18) is set on the side of the lower mold core (3) through a support plate.

7. A single action forming die for a precision metal part for an automobile as defined in claim 1, wherein: The lower mold core (3) is provided with multiple telescopic rods (19). The cavity of the telescopic rod (19) is connected to the cavity (4). One end of the telescopic rod (19) is provided with a push plate (20). The shape of the push plate (20) is adapted to the shape of the cavity (4) at the corresponding position. The telescopic rod (19) is provided with a spring (21). One end of the spring (21) is provided on one end of the inner wall of the telescopic outer tube of the telescopic rod (19), and the other end of the spring (21) is provided on one end of the telescopic inner rod of the telescopic rod (19).

8. A single-action forming die for a precision metal part of an automobile according to claim 7, characterized in that: The multiple telescopic rods (19) and push plates (20) are positioned below the main stress points of the metal parts.

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