Cold stamping drawing dies

Abstract

This invention provides a cold stamping and drawing die, comprising: an upper forming section, including at least one upper forming part, comprising: an upper pressure ring, a V-shaped die, at least one first ejector assembly, and at least one second ejector assembly, wherein a portion of the V-shaped die is connected to the upper pressure ring, the first ejector assembly is located at one end of the V-shaped die, and the second ejector assembly is located at the other end of the V-shaped die; and a lower forming section, located below the upper forming section, comprising at least one lower forming part, comprising: a lower pressure ring, a V-shaped punch, at least one first support assembly, and at least one second support assembly, wherein both the first and second support assemblies have actuator rods. This invention solves the technical problem of sheet metal movement when the die and pressure ring are closed in existing V-shaped pressure surface outer cover drawing dies.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and more specifically, to a cold stamping and drawing die. Background Technology

[0002] When the blank holder surface of the cold stamping and drawing die for outer cover parts has a V-shaped structure with a low center and high sides, the sheet metal to be processed is prone to sinking and collapsing after being placed on the blank holder ring due to its own weight and the shape of the V-shaped blank holder surface. In addition, the sheet metal will move around during the closing process of the die cavity and the blank holder ring. The above problems directly affect the dimensional accuracy, surface quality and formability of the drawn parts. The existing solution is to use a cylinder and ejector rod structure in the punch to lift the sheet metal. Although it can avoid the sheet metal sinking, it cannot control the movement of the sheet metal during closing. Moreover, the position of the ejector rod acting on the sheet metal in the punch can easily leave ejection marks on the final product. At the same time, the ejector rod is directly installed on the cylinder piston rod through the threaded hole, which is prone to loosening and falling off during production, thus causing damage to the die.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a cold stamping and drawing die to solve the technical problem of sheet metal movement when the die and the blank holder are closed in the existing V-shaped blank holder outer cover drawing die.

[0005] To achieve the above objectives, according to one aspect of the present invention, a cold stamping and drawing die is provided, comprising: an upper forming portion, the upper forming portion including at least one upper forming part, the upper forming portion including: an upper pressure ring, a V-shaped die, at least one first ejector assembly and at least one second ejector assembly, a portion of the V-shaped die being connected to the upper pressure ring, the first ejector assembly being located at one end of the V-shaped die, and the second ejector assembly being located at the other end of the V-shaped die, at least one of the first ejector assembly and the second ejector assembly including: a first ejector block and a second ejector block, one end of the first ejector block and one end of the second ejector block being respectively connected to one side of the upper pressure ring, the first ejector block and the second ejector block being disposed at a distance; and a lower forming portion, the lower forming portion being located below the upper forming portion, the lower forming portion including at least A lower forming section includes: a lower pressure ring, a V-shaped punch, at least one first support assembly, and at least one second support assembly. Part of the V-shaped punch is connected to the lower pressure ring, and a V-shaped die is arranged in a one-to-one correspondence with the V-shaped punch. The first support assembly is located at one end of the V-shaped punch, and the second support assembly is located at the other end of the V-shaped punch. Parts of the first support assembly and part of the second support assembly are respectively connected to the lower pressure ring. Both the first support assembly and the second support assembly have an actuator. When the sheet metal to be processed is placed on the V-shaped punch, part of the actuator abuts against part of the sheet metal to be processed, controlling the upper forming section to move to the lower forming section. When the first ejector block and the second ejector block pierce the sheet metal to be processed, the actuator is located between the first ejector block and the second ejector block.

[0006] Furthermore, the cold stamping and drawing die also includes: an upper die holder, the upper die holder having at least one first mounting position, the upper forming part being located below the upper die holder, an upper pressure ring being disposed within the first mounting position, and a portion of the upper pressure ring being connected to the upper die holder; and a lower die holder, the lower die holder being located below the upper forming part, the lower die holder having at least one second mounting position, a lower pressure ring being disposed within the second mounting position, and a portion of the lower pressure ring being connected to the lower die holder; wherein, controlling the upper die holder to drive the upper forming part to move towards the lower forming part, so that when the V-shaped die and the V-shaped punch are closed, a portion of the upper die holder abuts against a portion of the lower die holder.

[0007] Further, at least one of the first support assembly and the second support assembly includes: a first support base, one end of which is connected to the lower pressure ring, a V-shaped punch located on one side of the V-shaped punch, and an actuator rod movably connected to the other end of the first support base; a drive assembly located on the other side of the first support base, a fixed end of which is connected to the lower pressure ring, and an actuating end of which is movably connected to one end of the actuator rod; wherein the actuating end is controlled to give the actuator rod a supporting position between the first and second top material blocks, and an abutment position away from the first and second top material blocks.

[0008] Furthermore, at least one of the first and second top material blocks includes: a top material seat, which is connected to one side of the upper pressure ring; a top material rod, which is located below the top material seat, with one end of the top material rod connected to the top material seat, the top material rod and the top material seat being set at a preset angle, and the other end of the top material rod being provided with a spike.

[0009] Furthermore, a piercing unit is provided on the side of the top material rod, and the piercing unit extends along the axial direction of the top material rod.

[0010] Furthermore, the puncture unit section is a straight segment, which includes: a first component segment extending toward the geometric center of the V-shaped die; a second component segment positioned at a distance from the ejector pin, forming a preset angle with the first component segment, with one end of the second component segment connected to one end of the first component segment; and a third component segment forming a preset angle with the second component segment, with one end of the third component segment connected to the other end of the second component segment.

[0011] Furthermore, the angle between the second segment and the first segment is 84°-96°.

[0012] Furthermore, the angle between the second and third component segments is 130°-140°.

[0013] Furthermore, the included angle between the top material rod and the top material seat is 77°-87°.

[0014] Furthermore, the cross-section of the spike is triangular or fan-shaped.

[0015] By applying the technical solution of this invention, the actuators of the first and second support components of the lower forming part abut against the sheet metal to be processed, effectively supporting the sheet metal and preventing it from collapsing. During the downward movement of the upper forming part, the V-shaped die and V-shaped punch precisely cooperate, and the upper and lower pressure rings work together to press the sheet metal. When the first and second ejector blocks pierce the sheet metal, the actuator is located between them to form a limit, completely suppressing the sheet metal movement. Moreover, the first and second ejector blocks are connected to the upper pressure ring rather than inside the punch, avoiding leaving ejector marks on the product surface. At the same time, the actuator is integrated into the support component rather than a threaded connection structure, eliminating the risk of loosening and falling off. This significantly improves the dimensional accuracy, surface quality, and forming stability of the drawn parts, extends the service life of the mold, and solves the technical problem of sheet metal movement when the die and pressure ring are closed in the existing V-shaped pressure surface outer cover drawing mold. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the second embodiment of the cold stamping and drawing die of the present invention;

[0018] Figure 2 A schematic diagram of the second embodiment of the cold stamping and drawing die of the present invention;

[0019] Figure 3 The cold stamping and drawing die of the present invention Figure 2 Enlarged view of point A;

[0020] Figure 4 A schematic diagram of the structure of the first embodiment of the upper forming part in the cold stamping and drawing die of the present invention;

[0021] Figure 5 A schematic diagram of the structure of the lower forming part of the cold stamping and drawing die of the present invention;

[0022] Figure 6 A schematic diagram of the structure of the first embodiment of the first support component in the cold stamping and drawing die of the present invention;

[0023] Figure 7 A schematic diagram of the structure of the first embodiment of the first ejector block in the cold stamping and drawing die of the present invention;

[0024] Figure 8 A schematic diagram of the second embodiment of the first ejector block in the cold stamping and drawing die of the present invention.

[0025] The above figures include the following reference numerals:

[0026] 10. Upper mold base; 20. Upper forming part; 201. V-shaped die; 202. First ejector block; 203. Second ejector block; 204. Upper pressure ring; 30. Lower forming part; 301. Lower pressure ring; 302. V-shaped punch; 40. Lower mold base; 501. Drive assembly; 502. First support base; 503. Actuating rod; 601. Ejector rod; 602. Puncture unit; 603. Ejector seat; 701. First component section; 702. Second component section; 703. Third component section. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0031] As a key component in cold stamping, the outer cover has extremely high requirements for surface flatness, dimensional accuracy, and forming integrity. The design of the blank holder surface of its drawing die directly affects the forming quality. When the die blank holder surface adopts a V-shaped structure with a "low center and high sides," the geometric characteristics of this structure, together with the physical properties of the sheet metal, lead to a series of forming challenges:

[0032] The core characteristic of a V-shaped pressure surface is that it forms inclined support surfaces on both sides and a low-lying load-bearing area in the middle. After the sheet material to be processed is placed on the lower pressure ring, it will sink and collapse due to two key factors: First, the sheet material itself has a certain weight, and the outer cover sheet material is usually large in size. The distance between the high support points on both sides of the V-shaped pressure surface is large, and the low-lying area in the middle lacks an effective support structure. Under the action of gravity, the middle part of the sheet material sinks towards the low-lying area, forming a "collapsed waist" depression. Second, the inclined surfaces on both sides of the V-shaped pressure surface form an angle of 15°-45° with the horizontal plane. After the sheet material contacts the inclined surfaces, the support reaction force at the contact point is decomposed along the inclined direction, generating a lateral component force pointing towards the low-lying area in the middle, further aggravating the sinking trend of the middle part of the sheet material. The middle area of ​​the sheet material bulges downward, and the two sides are not tightly attached to the pressure surface, forming a significant height difference. Some thin sheet materials may even show local wrinkles or slight bending.

[0033] When the die begins operation, the V-shaped die and upper pressure ring of the upper forming part move downwards and close with the V-shaped punch and lower pressure ring of the lower forming part. The sheet metal is prone to lateral or longitudinal movement. The core reasons include: the sheet metal relies solely on the friction between itself and the pressure surface for positioning; the friction of the V-shaped inclined surface is distributed along the inclined direction, failing to provide effective lateral constraint; during the closing process, the downward pressure of the die on the sheet metal disrupts the frictional balance, causing the sheet metal to slide along the inclined surface to the sides or center; at the moment of closure, the pressure of the die and pressure ring on the sheet metal is gradually transmitted from the edge to the center; the geometric differences of the V-shaped surface cause inconsistent stress magnitude and direction in different parts of the sheet metal, resulting in uneven stress and strain, pushing the sheet metal to shift position. The direct consequence of this movement is that the initial position of the sheet metal before drawing deviates from the design reference, leading to uneven feed during subsequent drawing: excessive feed in some areas causes wrinkles, while insufficient feed in others causes cracking, severely affecting the dimensional accuracy of the drawn part.

[0034] To address the issue of sheet metal sagging and collapse, the industry commonly employs a "punch with built-in cylinder + ejector rod" ejector structure. Its specific design and shortcomings are as follows: An mounting hole is made in the middle area of ​​the V-shaped punch to fix the cylinder to the bottom of the punch. The ejector rod is connected to the cylinder piston rod through a threaded hole, with its tip extending beyond the punch's forming surface. When the sheet metal is placed on the pressure ring, the cylinder drives the ejector rod to extend upwards, with its tip abutting against the recessed area in the middle of the sheet metal. This upward support counteracts the sheet metal's own weight, causing the sheet metal to conform to the pressure surface, thus preventing sagging and collapse. However, this structure only provides axial support and lacks any lateral limiting mechanism, leaving the sheet metal unrestrained in the horizontal direction. Factors such as the pressure when the die and pressure ring close, and the stress release of the sheet metal itself, still cause the sheet metal to slide along the V-shaped surface, failing to fundamentally solve the problem of material movement.

[0035] The top of the ejector pin directly contacts the forming surface of the sheet metal, and to ensure support stability, the contact pressure between the ejector pin and the sheet metal needs to reach a certain value. The outer cover sheet metal is relatively soft, and the contact point of the ejector pin will form a permanent indentation on the sheet metal surface. This indentation cannot be eliminated by subsequent processes, directly affecting the surface quality of the product, and may even lead to product scrap.

[0036] The ejector pin and cylinder piston rod are connected by threads. However, the die generates high-frequency vibrations during cold stamping. Long-term vibrations cause the thread clearance to gradually increase and the thread surface to wear more rapidly. When the vibration intensity exceeds the load-bearing limit of the threaded connection, the ejector pin will loosen, and in severe cases, it may even detach directly from the piston rod. The detached ejector pin will become stuck in the cavity between the die and punch, causing a violent collision when the die closes. This can result in scratches and chipping on the forming surfaces of the V-shaped die and punch, and even damage to the cylinder. This not only requires high die repair costs but also causes production line downtime, severely impacting production efficiency.

[0037] In summary, the existing structure and solutions for V-shaped blanking surface outer cover drawing dies have multiple inherent defects. There is an urgent need for a technical solution that can simultaneously solve the risks of sheet metal denting, movement, ejection marks, and die damage, in order to meet the production requirements of high precision, high quality, and high efficiency for outer cover parts.

[0038] This application provides a cold stamping and drawing die, such as... Figures 1-5As shown, it includes: an upper forming section 20, which includes at least one upper forming part 20, comprising: an upper pressure ring 204, a V-shaped die 201, at least one first ejector assembly, and at least one second ejector assembly. A portion of the V-shaped die 201 is connected to the upper pressure ring 204. The first ejector assembly is located at one end of the V-shaped die 201, and the second ejector assembly is located at the other end of the V-shaped die 201. At least one of the first and second ejector assemblies includes: a first ejector block 202 and a second ejector block 203. One end of the first ejector block 202 and one end of the second ejector block 203 are respectively connected to one side of the upper pressure ring 204. The first ejector block 202 and the second ejector block 203 are disposed at a distance from each other. A lower forming section 30 is located below the upper forming section 20 and includes at least one lower forming part 30. The lower forming part 30 includes: The assembly comprises a lower pressure ring 301, a V-shaped punch 302, at least one first support assembly, and at least one second support assembly. Part of the V-shaped punch 302 is connected to the lower pressure ring 301. A V-shaped die 201 is correspondingly arranged with the V-shaped punch 302. The first support assembly is located at one end of the V-shaped punch 302, and the second support assembly is located at the other end of the V-shaped punch 302. Parts of the first support assembly and part of the second support assembly are respectively connected to the lower pressure ring 301. Both the first support assembly and the second support assembly have an actuator 503. When the sheet metal to be processed is placed on the V-shaped punch 302, part of the actuator 503 abuts against part of the sheet metal to be processed, controlling the upper forming part 20 to move downward to the lower forming part 30. When the first ejector block 202 and the second ejector block 203 pierce the sheet metal to be processed, the actuator 503 is located between the first ejector block 202 and the second ejector block 203.

[0039] By applying the technical solution of this invention, the actuator 503 of the first and second support components of the lower forming part abuts against the sheet metal to be processed, effectively supporting the sheet metal and preventing it from collapsing. During the downward movement of the upper forming part 20, the V-shaped die 201 and the V-shaped punch 302 are precisely matched, and the upper pressure ring 204 and the lower pressure ring 301 work together to press the sheet metal. When the first ejector block 202 and the second ejector block 203 pierce the sheet metal, the actuator 503 is located between them to form a limit, completely suppressing the sheet metal movement. Moreover, the first ejector block 202 and the second ejector block 203 are connected to the upper pressure ring 204 rather than inside the punch, avoiding leaving ejector marks on the product surface. At the same time, the actuator 503 is integrated into the support component rather than a threaded connection structure, eliminating the risk of loosening and falling off. This significantly improves the dimensional accuracy, surface quality, and forming stability of the drawn parts, extends the service life of the mold, and solves the technical problem of sheet metal movement when the die and pressure ring are closed in the V-shaped pressure surface outer cover drawing mold in the prior art.

[0040] Furthermore, the cold stamping and drawing die also includes: an upper die holder 10, which has at least one first mounting position, an upper forming part 20 located below the upper die holder 10, an upper pressure ring 204 disposed in the first mounting position, and a portion of the upper pressure ring 204 connected to the upper die holder 10; and a lower die holder 40, which is located below the upper forming part 20, has at least one second mounting position, a lower pressure ring 301 disposed in the second mounting position, and a portion of the lower pressure ring 301 connected to the lower die holder 40; wherein, controlling the upper die holder 10 to drive the upper forming part 20 to move to the lower forming part 30, so that when the V-shaped die 201 and the V-shaped punch 302 are closed, a portion of the upper die holder 10 abuts against a portion of the lower die holder 40.

[0041] In this embodiment, the upper die holder 10 is securely connected to the upper pressure ring 204 via the first mounting position, and the lower die holder 40 is securely connected to the lower pressure ring 301 via the second mounting position. The installation and positioning are accurate and the connection is reliable. When the upper die holder 10 drives the upper forming part 20 to move to the lower forming part 30, it can ensure the mold closing accuracy of the V-shaped die 201 and the V-shaped punch 302. When the mold is closed, part of the upper die holder 10 and part of the lower die holder 40 abut against each other, which further improves the mold closing stability, reduces the displacement of parts during the forming process, and effectively ensures the dimensional accuracy and forming quality of the drawn parts.

[0042] like Figure 6 As shown, the first support assembly and the second support assembly have the same structure. Taking the first support assembly as an example, it includes: a first support base 502, one end of which is connected to the lower pressure ring 301, a V-shaped punch 302 located on one side of the V-shaped punch 302, and an actuator 503 movably connected to the other end of the first support base 502; a drive assembly 501, located on the other side of the first support base 502, the fixed end of which is connected to the lower pressure ring 301, and the actuating end of which is movably connected to one end of the actuator 503; wherein, the actuator is controlled so that the actuator 503 has a support position between the first top material block 202 and the second top material block 203, and the actuator 503 has a clearance position away from the first top material block 202 and the second top material block 203.

[0043] In this embodiment, the first and second support components have the same structure, making them highly versatile and easy to install and maintain. The fixed ends of the first support base 502 and the drive component 501 are both connected to the lower pressure ring 301, ensuring a stable installation and reliable force transmission. The actuator 503 is movably connected to the actuator ends of the first support base 502 and the drive component 501. The drive component 501 can precisely control the actuator 503 to switch to the support position between the first top material block 202 and the second top material block 203, effectively limiting the material and preventing it from shifting. It can also be switched to an avoidance position without affecting the mold closing and part removal actions. It is flexible and adaptable to the forming process, ensuring the quality of the drawn parts and production efficiency.

[0044] like Figure 7 and Figure 8 As shown, the first top material block 202 and the second top material block 203 have the same structure. Taking the first top material block 202 as an example, it includes: a top material seat 603, which is connected to one side of the upper pressure ring 204; a top material rod 601, which is located below the top material seat 603. One end of the top material rod 601 is connected to the top material seat 603, and the top material rod 601 and the top material seat 603 are set at a preset angle. The other end of the top material rod 601 is provided with a spike. The first ejector block 202 and the second ejector block 203 have the same structure and are highly versatile, making them easy to process, manufacture, install and maintain. The ejector seat 603 is firmly connected to the upper pressure ring 204 and can reliably transmit the ejector force. The ejector rod 601 and the ejector seat 603 are set at a preset angle so that the tip can be accurately aligned with the target position of the sheet. The tip can effectively pierce the sheet and work with the actuator 503 to achieve precise sheet positioning, thereby improving the positioning stability of the sheet during the drawing process and ensuring the forming quality.

[0045] Furthermore, a piercing unit 602 is provided on the side of the ejector rod 601, extending axially along the ejector rod 601. The first ejector block 202 and the second ejector block 203 have the same structure and strong versatility, facilitating processing, manufacturing, installation, and maintenance. The ejector seat 603 is firmly connected to the upper pressure ring 204, reliably transmitting the ejector force. The ejector rod 601 and the ejector seat 603 are set at a preset angle, allowing the tip of the spike to accurately align with the target position of the sheet metal. The piercing unit 602 on the side of the ejector rod 601 extends axially, increasing the piercing contact area and enabling more stable piercing of the sheet metal. It also works with the actuator rod 503 to strengthen the sheet metal's limiting position, further improving the positioning stability of the sheet metal during the drawing process and effectively preventing movement to ensure forming quality.

[0046] Specifically, the cross-section of the puncture unit 602 is a straight segment, which includes: a first component segment 701, which extends toward the geometric center of the V-shaped die 201; a second component segment 702, which is positioned at a distance from the ejector pin 601 and forms a preset angle with the first component segment 701, with one end of the second component segment 702 connected to one end of the first component segment 701; and a third component segment 703, which forms a preset angle with the second component segment 702 and has one end connected to the other end of the second component segment 702.

[0047] In this embodiment, the first ejector block 202 and the second ejector block 203 have the same structure and strong versatility, which facilitates processing, manufacturing, installation and maintenance. The ejector seat 603 is firmly connected to the upper pressure ring 204 and can reliably transmit the ejector force. The ejector rod 601 and the ejector seat 603 are set at a preset angle so that the tip of the ejector pin can be accurately aligned with the target position of the sheet metal. The first component segment 701 of the piercing unit 602 extends towards the geometric center of the V-shaped die 201. The second component segment 702 maintains a distance from the ejector rod 601 and forms a preset angle with the first component segment 701. The third component segment 703 is connected to the second component segment 702 at a preset angle, forming a stable piercing structure, which not only improves the piercing strength but also expands the effective limiting range. With the help of the actuator rod 503, the sheet metal can be more firmly constrained, greatly reducing the sheet metal movement during the drawing process, and further ensuring the dimensional accuracy and forming quality of the drawn part.

[0048] In one exemplary embodiment, the included angle between the second component segment 702 and the first component segment 701 is 84°-96°. The first ejector block 202 and the second ejector block 203 have the same structure and are highly versatile, making them easy to process, manufacture, install and maintain. The ejector seat 603 is firmly connected to the upper pressure ring 204 and can reliably transmit the ejector force. The ejector rod 601 and the ejector seat 603 are set at a preset angle, which allows the tip of the spike to be accurately aligned with the target position of the sheet metal. The first component segment 701 of the piercing unit 602 extends towards the geometric center of the V-shaped die 201. The second component segment 702 maintains a distance from the ejector rod 601 and forms an angle of 84°-96° with the first component segment 701. This angle design makes the piercing structure more stable. The third component segment 703 is connected to the second component segment 702 at a preset angle, which further optimizes the force transmission, improves the piercing strength and expands the effective limiting contact area. Together with the actuator rod 503, it can more firmly constrain the sheet metal, greatly reduce the sheet metal movement during the drawing process, and further ensure the dimensional accuracy and forming quality of the drawn parts.

[0049] In one exemplary embodiment, the included angle between the second component segment 702 and the third component segment 703 is 130°-140°. The first ejector block 202 and the second ejector block 203 have the same structure and are highly versatile, making them easy to process, manufacture, install and maintain. The ejector seat 603 is firmly connected to the upper pressure ring 204 and can reliably transmit the ejector force. The ejector rod 601 and the ejector seat 603 are set at a preset angle, which allows the top spike to be accurately aligned with the target position of the sheet metal. The first component segment 701 of the piercing unit 602 extends towards the geometric center of the V-shaped die 201. The second component segment 702 maintains a distance from the ejector rod 601 and forms an angle of 84°-96° with the first component segment 701. The second component segment 702 and the third component segment 703 are connected at an angle of 130°-140°. This angle design makes the piercing structure more reasonably stressed and more stable, which not only improves the piercing strength but also expands the effective limiting contact area. Together with the actuator rod 503, it can more firmly constrain the sheet metal, greatly reduce the sheet metal movement during the drawing process, and further ensure the dimensional accuracy and forming quality of the drawn parts.

[0050] In one exemplary embodiment, the included angle between the top material rod 601 and the top material seat 603 is 77°-87°. The first ejector block 202 and the second ejector block 203 have the same structure and are highly versatile, making them easy to process, manufacture, install, and maintain. The ejector seat 603 is firmly connected to the upper pressure ring 204, which can reliably transmit the ejector force. The ejector rod 601 is set at an angle of 77°-87° with the ejector seat 603, which allows the tip of the spike to be more accurately aligned with the target position of the sheet metal. The first component segment 701 of the piercing unit 602 extends towards the geometric center of the V-shaped die 201. The second component segment 702 maintains a distance from the ejector rod 601 and forms an angle of 84°-96° with the first component segment 701. The second component segment 702 is connected to the third component segment 703 at an angle of 130°-140°. The multi-angle design makes the piercing structure more evenly stressed and more stable, which not only improves the piercing strength but also expands the effective limiting contact area. Together with the actuator rod 503, it can more firmly constrain the sheet metal, greatly reduce the sheet metal movement during the drawing process, and further ensure the dimensional accuracy and forming quality of the drawn parts.

[0051] In one exemplary embodiment, the cross-section of the spike is triangular or fan-shaped. The multi-angle and cross-sectional shape design makes the piercing structure more evenly stressed and the piercing effect more reliable. It not only expands the effective limiting contact area but also enhances the constraint force. Together with the actuator 503, it can more firmly fix the sheet metal, greatly reduce the sheet metal movement during the drawing process, and effectively ensure the dimensional accuracy and forming quality of the drawn part.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cold stamping and drawing die, characterized in that, include: The upper forming part (20) includes: an upper pressure ring (204), a V-shaped die (201), at least one first ejector assembly and at least one second ejector assembly. Part of the V-shaped die (201) is connected to the upper pressure ring (204). The first ejector assembly is located at one end of the V-shaped die (201), and the second ejector assembly is located at the other end of the V-shaped die (201). At least one of the first ejector assembly and the second ejector assembly includes: a first ejector block (202) and a second ejector block (203). One end of the first ejector block (202) and one end of the second ejector block (203) are respectively connected to one side of the upper pressure ring (204). The first ejector block (202) and the second ejector block (203) are arranged at a distance. The lower forming part (30) is located below the upper forming part (20). The lower forming part (30) includes: a lower pressure ring (301), a V-shaped punch (302), at least one first support assembly and at least one second support assembly. Part of the V-shaped punch (302) is connected to the lower pressure ring (301). The V-shaped die (201) and the V-shaped punch (302) are arranged in a one-to-one correspondence. The first support assembly is located at one end of the V-shaped punch (302), and the second support assembly is located at the other end of the V-shaped punch (302). Part of the first support assembly and part of the second support assembly are respectively connected to the lower pressure ring (301). Both the first support assembly and the second support assembly have an actuator (503). When the sheet metal to be processed is placed on the V-shaped punch (302), part of the actuator (503) abuts against part of the sheet metal to be processed, controlling the upper forming part (20) to move towards the lower forming part (30). When the first ejector block (202) and the second ejector block (203) pierce the sheet metal to be processed, the actuator (503) is located between the first ejector block (202) and the second ejector block (203).

2. The cold stamping and drawing die according to claim 1, characterized in that, The cold stamping and drawing die also includes: The upper mold base (10) has at least one first mounting position, the upper forming part (20) is located below the upper mold base (10), the upper pressure ring (204) is disposed in the first mounting position, and a portion of the upper pressure ring (204) is connected to the upper mold base (10). The lower mold base (40) is located below the upper forming part (20). The lower mold base (40) has at least one second mounting position. The lower pressure ring (301) is disposed in the second mounting position, and a portion of the lower pressure ring (301) is connected to the lower mold base (40). In this process, the upper mold base (10) is controlled to move the upper forming part (20) toward the lower forming part (30) so that when the V-shaped die (201) and the V-shaped punch (302) are closed, part of the upper mold base (10) and part of the lower mold base (40) abut against each other.

3. The cold stamping and drawing die according to claim 1 or 2, characterized in that, At least one of the first support assembly and the second support assembly includes: The first support base (502) is connected at one end to the lower pressure ring (301), and the actuator (503) is movably connected to the other end of the first support base (502). The drive assembly (501) is located on the other side of the first support base (502). The fixed end of the drive assembly (501) is connected to the lower pressure ring (301), and the actuating end of the drive assembly (501) is movably connected to one end of the actuating rod (503). The actuator is controlled such that the actuator (503) has a support position between the first top material block (202) and the second top material block (203), and the actuator (503) has a clearance position away from the first top material block (202) and the second top material block (203).

4. The cold stamping and drawing die according to claim 3, characterized in that, At least one of the first top material block (202) and the second top material block (203) includes: Top material seat (603), the top material seat (603) is connected to one side of the upper pressure ring (204); A top material rod (601) is located below the top material seat (603). One end of the top material rod (601) is connected to the top material seat (603). The top material rod (601) and the top material seat (603) are set at a preset angle. The other end of the top material rod (601) is provided with a spike.

5. The cold stamping and drawing die according to claim 4, characterized in that, The top material rod (601) is provided with a piercing unit (602) on its side, and the piercing unit (602) extends along the axial direction of the top material rod (601).

6. The cold stamping and drawing die according to claim 5, characterized in that, The cross-section of the piercing unit (602) is a straight segment, and the straight segment includes: The first component segment (701) extends toward the geometric center of the V-shaped die (201); The second component section (702) is arranged at a distance from the top material rod (601), and the second component section (702) is arranged at a preset angle with the first component section (701). One end of the second component section (702) is connected to one end of the first component section (701). The third component segment (703) is arranged at a preset angle with the second component segment (702), and one end of the third component segment (703) is connected to the other end of the second component segment (702).

7. The cold stamping and drawing die according to claim 6, characterized in that, The angle between the second component segment (702) and the first component segment (701) is 84°-96°.

8. The cold stamping and drawing die according to claim 6, characterized in that, The angle between the second component segment (702) and the third component segment (703) is 130°-140°.

9. The cold stamping and drawing die according to claim 4, characterized in that, The included angle between the top material rod (601) and the top material seat (603) is 77°-87°.

10. The cold stamping and drawing die according to claim 4, characterized in that, The cross-section of the spike is triangular or fan-shaped.

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