A drawing die and its drawing apparatus

Abstract

This application relates to a drawing die and its drawing apparatus, comprising: a base, a material support assembly, a blank holder ring, and a punch. The material support assembly is movably mounted on the top of the base and includes a material support rod and multiple press rods. The multiple press rods are interconnected, and the material support rod is movably connected to a portion of the press rods. The blank holder ring is connected to the top of another portion of the press rods. The punch is connected to the base and is disposed inside the blank holder ring. A third through hole is provided on the punch, and a portion of the press rods pushes the material support rod along the axial direction of the third through hole, moving within the third through hole. In this invention, when the press rods rise, they lift the blank holder ring and the material support rods. When pressing the sheet metal, the blank holder ring moves downward, causing all the press rods to move downward. Since the material support rods are movably connected to the press rods, they will disengage from the press rods. At this time, the material support rods will also immediately begin to move downward under their own weight, preventing the material support rods from continuously pushing against the sheet metal during pressing.

Description

Technical Field

[0001] This application relates to the field of drawing dies, and in particular to a drawing die and a drawing apparatus thereof. Background Technology

[0002] The drawing process is the most crucial step in the stamping process, directly determining whether the product shape can be achieved. Therefore, the design of the drawing die is extremely important. During the drawing process, when the steel sheet is first placed on the blank holder, it will sink slightly due to its own weight. This deformation is extremely detrimental to the drawing process, often resulting in incomplete forming and significant defects such as wrinkles. Therefore, auxiliary devices are incorporated into the design of the drawing die to support or fix the center of the sheet metal, making it as flat as possible to meet forming requirements. Existing drawing dies use a support rod to support the sheet metal. The support rod is fixed to a cylinder and moved up and down by the cylinder. However, when pressing the steel sheet, if the cylinder retracts slowly or jams, the support rod will remain pressed against the center of the sheet metal. This not only causes quality defects in the parts but also damages the die, resulting in significant production losses. Summary of the Invention

[0003] This application provides a drawing die and a drawing device to solve the problem in the related art where the delayed failure of the cylinder causes the material support rod to keep pressing against the middle of the sheet metal, resulting in quality defects in the parts and damage to the die.

[0004] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a drawing die is provided, comprising: a base, a material support assembly, a blank holder ring, and a punch. The material support assembly is movably mounted on the top of the base. The material support assembly includes a material support rod and multiple press rods, which are interconnected. The material support rod is movably connected to a portion of the press rods. The blank holder ring is connected to the top of another portion of the press rods. The punch is connected to the base and disposed inside the blank holder ring. A fourth through hole is provided on the punch, and a portion of the press rods pushes the material support rod along the axial direction of the fourth through hole, moving within the fourth through hole.

[0005] In some embodiments, the material support assembly further includes a connecting slider disposed between the material support rod and a portion of the press support rod, the connecting slider being movably connected to the press support rod.

[0006] In some embodiments, a connecting space is provided within the connecting slider along the axial direction, and part of the material support rod is detachably connected to the connecting space.

[0007] In some embodiments, the material support rod is screwed into and connected within the space, and the surface of the material support rod is provided with scale markings.

[0008] In some embodiments, a groove is provided in the punch, and the connecting slider is slidably connected in the groove; a limiting member is provided in the groove, and when the drawing die is in the first state, the top end of the limiting member is in contact with the bottom end of the connecting slider.

[0009] In some embodiments, the limiting member has a third through hole, and the connecting slider includes a first connecting part and a second connecting part. The diameter of the circumscribed circle of any section of the first connecting part perpendicular to the axial extension direction of the material support rod is greater than the diameter of the circumscribed circle of any section of the second connecting part perpendicular to the axial extension direction of the material support rod and the diameter of the third through hole. The second connecting part passes through the third through hole.

[0010] In some embodiments, when the drawing die is in the first state, the material support rod is located inside the fourth through hole, and the horizontal plane at the top of the material support rod is lower than the horizontal plane at the top of the fourth through hole; or, when the drawing die is in the second state, the top of the material support rod extends out of the fourth through hole, and the horizontal plane at the top of the material support rod does not exceed the horizontal plane at the top of the pressure ring.

[0011] In some embodiments, the top surface of the material support rod is an arc surface.

[0012] In some embodiments, a base is provided, wherein a first through hole is provided for the press support rod to pass through; a lower mold base is connected to the top of the base, wherein a second through hole is provided for the press support rod to pass through, and the first through hole and the second through hole are coaxially arranged.

[0013] In a second aspect, a drawing apparatus is provided, comprising: a drawing die and a driving device as described above, the driving device being connected to a plurality of the press support rods.

[0014] The beneficial effects of the technical solution provided in this application include:

[0015] This application provides a drawing die and its drawing device. When the press support rod rises, it lifts the blank holder and the material support rod together. During the drawing process, the blank holder supports the edge of the sheet metal, and the material support rod supports the weight-bearing indentation of the sheet metal. When the sheet metal is pressed together, the blank holder moves downward under the pressure, causing all the press support rods to move downward. Since the material support rod is movably connected to the press support rod, it will disengage from the press support rod. At this time, the material support rod will also immediately begin to move downward under its own weight, avoiding the continuous support of the material support rod against the sheet metal during pressing, thus avoiding the problem of quality defects in parts and damage to the die caused by the continuous support of the material support rod against the middle of the sheet metal. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a convex membrane structure provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the lower mold base structure provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the pressure ring structure provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the pressure ring and lower die base structure provided in the embodiments of this application;

[0021] Figure 5 This is a schematic cross-sectional view of the overall structure in the first state provided in an embodiment of this application;

[0022] Figure 6 This is a schematic cross-sectional view of the overall structure in the second state provided in an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the convex mold, pressure ring, and lower mold base structure provided in the embodiments of this application;

[0024] Figure 8 This is a schematic diagram of the upper slider structure of the press provided in an embodiment of this application;

[0025] Figure 9 This is a schematic diagram of the upper mold structure provided in an embodiment of this application;

[0026] Figure 10 This is a schematic diagram of the upper slide block and upper die structure of the press provided in an embodiment of this application;

[0027] Figure 11 This is a schematic diagram of the upper slide block and upper die structure of the press provided in an embodiment of this application;

[0028] Figure 12 This is a schematic diagram of the drawing die and the upper slide block structure of the press provided in the embodiments of this application;

[0029] Figure 13 This is a schematic diagram of the punch and connecting slider structure provided in an embodiment of this application;

[0030] Figure 14 This is a schematic diagram of the connecting slider structure provided in an embodiment of this application.

[0031] In the diagram: 1. Base; 10. Base plate; 100. First through hole; 11. Lower mold base; 110. Second through hole;

[0032] 2. Limiting component; 20. Third through hole;

[0033] 3. Material support assembly; 30. Press support rod; 31. Connecting slider; 310. First connecting part; 311. Second connecting part; 312. Guide plate; 32. Material support rod;

[0034] 4. Pressure ring; 40. First limiting part;

[0035] 5. Punch; 50. Fourth through hole; 51. Slide groove; 52. Second limiting part;

[0036] 6. Upper mold; 60. First pressing part; 61. Second pressing part;

[0037] 7. Upper slide block of the press. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0039] See Figures 1 to 14 This application provides a drawing die and a drawing device thereof, which can solve the problem in the related art where the delayed failure of the cylinder causes the material support rod to keep pressing against the middle of the sheet metal, resulting in quality defects in the parts and damage to the die.

[0040] In a first aspect, a drawing die is provided, comprising: a base 1, a material support assembly 3, a blank holder ring 4, and a punch 5. The material support assembly 3 is movably mounted on the top of the base 1. The material support assembly 3 includes a material support rod 32 and a plurality of press support rods 30. The plurality of press support rods 30 are interconnected. The material support rod 32 is movably connected to a portion of the press support rods 30. The blank holder ring 4 is connected to the top of another portion of the press support rods 30. The punch 5 is connected to the base 1 and is disposed inside the blank holder ring 4. A fourth through hole 50 is provided on the punch 5. A portion of the press support rods 30 pushes the material support rod 32 along the axial direction of the fourth through hole 50 and moves within the fourth through hole 50.

[0041] The drawing process is the most crucial step in the stamping process, directly determining whether the product shape can be achieved. Therefore, the design of the drawing die is of paramount importance. During the drawing process, when the steel sheet is first placed on the blank holder 4, its own weight causes a slight downward curve in the middle. This deformation is extremely detrimental to the drawing process, often resulting in incomplete forming and significant defects such as wrinkles. Therefore, auxiliary devices are incorporated into the design of the drawing die to support or fix the sheet metal, ensuring its flatness to meet forming requirements.

[0042] In existing drawing dies, a support rod 32 is used to support the sheet metal. However, the support rod 32 is directly fixed to the cylinder, and the support rod 32 is moved up and down by the cylinder. When pressing the steel sheet, if the cylinder retracts slowly or jams, the support rod 32 will keep pressing against the middle of the sheet metal. This will not only cause quality defects in the parts but also damage the die, resulting in huge losses in production.

[0043] In this application, multiple press support rods 30 are provided, and the multiple press support rods 30 are connected to each other. A part of the press support rods 30 are connected to the material support rods 32, and another part of the press support rods 30 are connected to the pressure ring 4. The pressure ring 4 is fixedly connected to the other part of the press support rods 30. When the press support rod 30 rises, it will lift the pressure ring 4 and the material support rod 32 together. During the drawing process, the pressure ring 4 supports the edge of the sheet material, and the material support rod 32 supports the inward sinking point of the sheet material due to gravity. When the sheet material is pressed, the pressure ring 4 moves downward under the action of pressure, which drives all the press support rods 30 to move downward. Since the material support rod 32 is movably connected to the press support rod 30, the material support rod 32 will disengage from the press support rod 30. At this time, the material support rod 32 will also start to move downward immediately under its own gravity, so as to avoid the material support rod 32 continuously pushing against the sheet material during the pressing process, and avoid the problem of quality defects in parts and mold damage caused by the material support rod 32 continuously pushing against the middle of the sheet material.

[0044] It should be noted that the punch 5 is disposed inside the blank holder 4, and the punch 5 is fixed to the base 1 by screws. A guide plate is provided on the outer peripheral surface of the blank holder 4, and a guide groove adapted to the guide plate is provided on the inner wall of the base 1. The guide plate can slide up and down in the guide groove, so that the blank holder 4 can slide up and down relative to the base 1. A first limiting part 40 is provided on the inner wall of the blank holder 4, and a second limiting part 52 corresponding to the position of the first limiting part 40 is provided on the outer surface of the punch 5. This drawing die includes two states:

[0045] When the drawing die is in the first state, the support rod 32 is located inside the fourth through hole 50, and the horizontal plane of the top of the support rod 32 is lower than the horizontal plane of the top of the fourth through hole 50. The first limiting part 40 and the second limiting part 52 are in contact. Preferably, when the drawing die is in the first state, the horizontal plane of the top of the support rod 32 is 5mm lower than the horizontal plane of the top of the fourth through hole 50. The purpose of this setting is to prevent the sheet metal from contacting the support rod 32 during the forming process of the punch 5, and to avoid friction causing scratches on the sheet metal.

[0046] When the drawing die is in the second state, the top of the support rod 32 extends into the fourth through hole 50. The horizontal plane of the top of the support rod 32 does not exceed the horizontal plane of the top of the pressure ring 4. The first limiting part 40 is separated from the second limiting part 52, and the first limiting part 40 is located on top of the second limiting part 52. The phrase "the horizontal plane of the top of the support rod 32 does not exceed the horizontal plane of the top of the pressure ring 4" means that the horizontal plane of the top of the support rod 32 is lower than the horizontal plane of the top of the pressure ring 4, or the horizontal plane of the top of the support rod 32 is on the same horizontal plane as the top of the pressure ring 4. Because the slide block 7 of the press descends quickly when pressing the sheet metal, the support rod 32 can only descend by gravity. To prevent the support rod 32 from descending before the pressure ring 4 has a chance to descend, preferably, when the drawing die is in the second state, the horizontal plane of the top of the support rod 32 is 10mm lower than the horizontal plane of the top of the pressure ring 4, which can effectively prevent the sheet metal from being deformed by the support rod 32.

[0047] The purpose of providing the first limiting part 40 and the second limiting part 52 is to limit the downward movement of the pressure ring 4. Therefore, in some possible embodiments, such as Figure 6 As shown, a contact surface is provided on the inner wall of the pressure ring 4 to form a first limiting part 40, and a contact surface is provided on the outer surface of the punch 5 to form a second limiting part 52. In order to improve the limiting effect, anti-slip particles are provided on the first limiting part 40 and the second limiting part 52. In some other possible embodiments, the inner wall of part of the pressure ring 4 protrudes towards the side closer to the punch 5 to form the first limiting part 40, and the outer surface of part of the punch 5 protrudes towards the side closer to the pressure ring 4 to form the second limiting part 52. When the two protrusions come into contact, the protrusion on the punch 5 can restrict the protrusion on the pressure ring 4 from continuing to move downward, so as to limit the downward movement of the pressure ring 4.

[0048] Based on the above embodiments, in this embodiment, the material support assembly 3 further includes a connecting slider 31. The connecting slider 31 is disposed between the material support rod 32 and a portion of the press support rod 30, and the connecting slider 31 is movably connected to the press support rod 30. Connecting the connecting slider 31 to the material support rod 32 can increase the weight of the material support rod 32, thereby increasing the speed at which the material support rod 32 moves downward under the action of gravity.

[0049] A groove 51 is provided inside the punch 5, located at the bottom of the fourth through hole 50 and communicating with it. The connecting slider 31 is slidably connected within the groove 51, and the groove 51 limits the movement of the connecting slider 31 vertically. A guide plate 312 is provided on the surface of the connecting slider 31, so that the guide plate 312 fits into the groove 51. Furthermore, a guide groove adapted to the guide plate 312 is provided inside the groove 51. The guide plate 312 slides inside the guide groove, and the guide plate 312, in conjunction with the guide groove, further limits the vertical movement of the connecting slider 31, preventing the connecting slider 31 from tilting during sliding.

[0050] There are several ways to connect the slider 31 and the material support rod 32:

[0051] In some possible embodiments, the material support rod 32 is fixedly connected to the top of the connecting slider 31;

[0052] In some other possible embodiments, the material support rod 32 is detachably connected to the connecting slider 31. The distance between the top of the material support rod 32 and the top of the connecting slider 31 is set as L. To facilitate adjustment of the distance L, a connecting space is provided within the connecting slider 31 along its axial direction, and a portion of the material support rod 32 is detachably connected to this connecting space. When L needs to be increased, the portion of the material support rod 32 located within the connecting space is reduced; when L needs to be decreased, the portion of the material support rod 32 located within the connecting space is increased. For example, a first threaded groove is provided on the inner wall of the connecting space, and a second threaded groove is provided on the outer circumferential surface of the material support rod 32, allowing a portion of the material support rod 32 to be screwed into the connecting space. When L needs to be increased, the material support rod 32 is rotated clockwise; when L needs to be decreased, the material support rod 32 is rotated counterclockwise. To facilitate determining the specific value of L, a scale mark is provided on the surface of the material support rod 32.

[0053] The above embodiments are merely various possible implementations of the embodiments of this application, and the embodiments of this application are not limited thereto.

[0054] To further limit the return stroke of the connecting slider 31, a limiting member 2 is provided in the groove 51. When the drawing die is in the first state, the top end of the limiting member 2 is in contact with the bottom end of the connecting slider 31, so that the limiting member 2 supports the connecting slider 31. When the top end of the limiting member 2 is in contact with the bottom end of the connecting slider 31, the material support rod 32 is located inside the fourth through hole 50. Specifically, the limiting member 2 has a third through hole 20. The connecting slider 31 includes a first connecting part 310 and a second connecting part 311. The diameter of the circumscribed circle of any section of the first connecting part 310 perpendicular to the axial extension direction of the material support rod 32 is greater than the diameter of the circumscribed circle of any section of the second connecting part 311 perpendicular to the axial extension direction of the material support rod 32 and the diameter of the third through hole 20. The second connecting part 311 passes through the third through hole 20. The axial cross-section of the first connecting part 310 can be rectangular, circular, or any other arbitrary shape; the axial cross-section of the second connecting part 311 can also be rectangular, circular, or any other arbitrary shape, for example, the second connecting part 311 can be frustum-shaped. There are no restrictions on the shapes of the first connecting part 310 and the second connecting part 311, but it is necessary to ensure that the connecting slider 31 can move vertically up and down, and that the structure of the connecting slider 31 is robust and has good load-bearing capacity. The second connecting part 311 has a third through hole 20. When the top end of the limiting member 2 is in contact with the bottom end of the first connecting part 310, the limiting member 2 supports the connecting slider 31, restricting the connecting slider 31 from moving further downward.

[0055] The movable connection between the connecting slider 31 and the press support rod 30 means that: the connecting slider 31 is located at the top of part of the press support rod 30; when all the press support rods 30 move upward, the bottom end of the connecting slider 31 contacts the top end of part of the press support rod 30; when all the press support rods 30 move downward, the top end of part of the press support rod 30 moves away from the bottom end of the connecting slider 31, and there is a gap between the press support rod 30 and the connecting slider 31.

[0056] Based on the above embodiments, in this embodiment, if the diameter of the material support rod 32 is designed to be too small, it is prone to bending and deformation during long-term operation, causing it to get stuck inside the fourth through hole 50 when moving up and down. If the diameter of the material support rod 32 is designed to be too large, it will damage the profile of the punch 5, leading to defects such as drawing cracks and wrinkles. Therefore, preferably, the diameter of the material support rod 32 is designed to be 20mm. Simultaneously, the top surface of the material support rod 32 is designed as an arc surface, that is, the contact surface between the material support rod 32 and the sheet metal is designed as an R-shaped arc. The radius of the R-shaped arc generally corresponds to the designed diameter of the material support rod 32. When the diameter of the material support rod 32 is designed to be 20mm, R is 10mm. The reason for designing the top surface of the material support rod 32 as an arc surface is to reduce the contact area between the material support rod 32 and the sheet metal, so as to prevent the material support rod 32 from causing surface scratches on the sheet metal when it slides on the pressure ring 4 and the punch 5. The material support rod 32 is set at the gravity point of the recessed plate. Since setting one material support rod 32 will result in insufficient support force, and setting multiple material support rods 32 will damage the surface of the punch 5, it is preferable to set two material support rods 32.

[0057] Based on the above embodiments, in this embodiment, the base 1 includes: a base 10 and a lower mold base 11. The base 10 has a first through hole 100 through which the press support rod 30 passes. The lower mold base 11 is connected to the top of the base 10. The lower mold base 11 has a second through hole 110 through which the press support rod 30 passes. The first through hole 100 and the second through hole 110 are coaxially arranged.

[0058] In this embodiment, the lower die holder 11 is disposed at the top of the base 10, and the punch 5 is disposed at the top of the lower die holder 11. Parts of the first through hole 100 and the second through hole 110 are coaxially arranged with the slide groove 51 and the fourth through hole 50, and communicate with the slide groove 51 and the fourth through hole 50. The first through hole 100 and the second through hole 110 serve to guide and limit the movement of the press support rod 30.

[0059] Therefore, when the material support rod 32 is needed to support the sheet metal, multiple press support rods 30 are raised together. These multiple press support rods 30 will lift the pressure ring 4 and the material support rod 32 together, causing the press support rods 30 to move upwards within the first through hole 100 and the second through hole 110. Specifically, some press support rods 30 lift the pressure ring 4, and some press support rods 30 lift the material support rod 32, causing the connecting slider 31 to move upwards within the slide groove 51, and the material support rod 32 to move upwards within the fourth through hole 50. During the drawing process, the pressure ring 4 supports the edge of the sheet metal, and the support rod 32 supports the inward sinking point of the sheet metal due to gravity. When pressing the sheet metal, since the pressure ring 4 is fixedly connected to part of the press support rod 30, and the connecting slider 31 is movably connected to part of the press support rod 30, pressing down the pressure ring 4 will cause the pressure ring 4 to move downward, driving all the press support rods 30 to move downward. Since the support rod 32 is movably connected to the press support rod 30, the support rod 32 will disengage from the press support rod 30. At this time, the support rod 32 will also immediately begin to move downward under its own gravity, avoiding the support rod 32 continuously pushing against the sheet metal during pressing, and avoiding the problem of quality defects in parts and mold damage caused by the support rod 32 continuously pushing against the middle of the sheet metal.

[0060] In addition, the drawing die also includes an upper die 6. When pressing the sheet metal, the upper die 6 moves downward to press the sheet metal. In order to avoid the material support rod 32 moving slowly when the upper die 6 presses the sheet metal, the upper die 6 is provided with a first pressing part 60 and a second pressing part 61. The horizontal plane at the bottom end of the first pressing part 60 is below the horizontal plane at the bottom end of the second pressing part 61. The first pressing part 60 is in contact with the pressure ring 4, and the second pressing part 61 is in contact with the punch 5. Therefore, the first pressing part 60 is in contact with the pressure ring 4 first, and then the second pressing part 61 is in contact with the punch 5. This gives the material support rod 32 a certain reaction time, so that before the second pressing part 61 is in contact with the punch 5, the material support rod 32 has already retracted into the fourth through hole 50.

[0061] Secondly, a drawing apparatus is provided, comprising: the drawing die and the driving device described above, wherein the driving device is connected to a plurality of press support rods 30.

[0062] In this application, multiple press support rods 30 are provided and interconnected. Some press support rods 30 are connected to material support rods 32, while others are connected to a pressure ring 4. The pressure ring 4 is fixedly connected to the other part of the press support rods 30. When the press support rods 30 are raised, they will lift the pressure ring 4 and the material support rods 32 together. During the drawing process, the pressure ring 4 supports the edge of the sheet material, and the material support rods 32 support the inward sinking point of the sheet material due to gravity. When pressing the sheet metal, the pressure ring 4 moves downward under the pressure, causing all the press support rods 30 to move downward. Since the material support rod 32 is movably connected to the press support rod 30, the material support rod 32 will disengage from the press support rod 30. At this time, the material support rod 32 will also start to move downward immediately under its own weight, avoiding the material support rod 32 from continuously pushing against the sheet metal during pressing, and avoiding the problem of quality defects in parts and damage to the mold caused by the material support rod 32 continuously pushing against the middle of the sheet metal.

[0063] The driving device includes a press lower slide and a power source. The press lower slide is located at the bottom of the drawing die and is connected to multiple material support rods 32. When the power source drives the press lower slide to move upward, the press lower slide pushes the multiple material support rods 32 upward; when the power source drives the press lower slide to move downward, the press lower slide pushes the multiple material support rods 32 downward.

[0064] In addition, the drawing die also includes an upper die 6, and the driving device also includes an upper slide block 7 of the press. When pressing the sheet metal, when the power source drives the upper slide block 7 of the press to move downward, the upper slide block 7 of the press pushes the upper die 6 downward to press the sheet metal. In order to avoid the material support rod 32 moving slowly when the upper die 6 presses the sheet metal, the upper die 6 is provided with a first pressing part 60 and a second pressing part 61. The horizontal plane at the bottom end of the first pressing part 60 is below the horizontal plane at the bottom end of the second pressing part 61. The first pressing part 60 is in contact with the pressure ring 4, and the second pressing part 61 is in contact with the punch 5. Therefore, the first pressing part 60 is in contact with the pressure ring 4 first, and then the second pressing part 61 is in contact with the punch 5. This gives the material support rod 32 a certain reaction time, so that before the second pressing part 61 is in contact with the punch 5, the material support rod 32 has already retracted into the fourth through hole 50.

[0065] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0066] It should be noted that in this application, relational terms such as "first" and "second" are used merely 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.

[0067] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A drawing die, characterized in that, It includes: Base (1); Material support assembly (3), the material support assembly (3) is movably mounted on the top of the base (1), the material support assembly (3) includes a material support rod (32) and a plurality of press support rods (30), the plurality of press support rods (30) are connected to each other, and the material support rod (32) is movably connected to a portion of the press support rods (30); A pressure ring (4) and a punch (5) are provided. The pressure ring (4) is connected to the top of another part of the press support rod (30). The punch (5) is connected to the base (1) and is located inside the pressure ring (4). A fourth through hole (50) is provided on the punch (5). A part of the press support rod (30) pushes the material support rod (32) along the axial direction of the fourth through hole (50) and moves within the fourth through hole (50). The material support assembly (3) further includes a connecting slider (31), which is disposed between the material support rod (32) and a portion of the press support rod (30), and the connecting slider (31) is movably connected to the press support rod (30); The punch (5) has a groove (51) inside, and the connecting slider (31) is slidably connected in the groove (51); A limiting member (2) is provided in the groove (51). When the drawing die is in the first state, the top end of the limiting member (2) is in contact with the bottom end of the connecting slider (31). The limiting member (2) is provided with a third through hole (20). The connecting slider (31) includes a first connecting part (310) and a second connecting part (311). The diameter of the circumscribed circle of any section of the first connecting part (310) perpendicular to the axial extension direction of the material support rod (32) is greater than the diameter of the circumscribed circle of any section of the second connecting part (311) perpendicular to the axial extension direction of the material support rod (32) and the diameter of the third through hole (20). The second connecting part (311) passes through the third through hole (20).

2. The drawing die as described in claim 1, characterized in that: Along the axial direction of the connecting slider (31), a connecting space is provided inside the connecting slider (31), and part of the material support rod (32) can be detachably connected to the connecting space.

3. The drawing die as described in claim 2, characterized in that: The material support rod (32) is screwed into and connected within the space, and the surface of the material support rod (32) is provided with scale marks.

4. The drawing die as described in claim 1, characterized in that: When the drawing die is in the first state, the material support rod (32) is located inside the fourth through hole (50), and the horizontal plane at the top of the material support rod (32) is lower than the horizontal plane at the top of the fourth through hole (50); Alternatively, when the drawing die is in the second state, the top of the material support rod (32) extends into the fourth through hole (50), and the horizontal plane at the top of the material support rod (32) does not exceed the horizontal plane at the top of the pressure ring (4).

5. The drawing die as described in claim 1, characterized in that: The top surface of the material support rod (32) is an arc surface.

6. The drawing die as described in claim 1, characterized in that, The base (1) includes: The base (10) has a first through hole (100) for the press support rod (30) to pass through. The lower mold base (11) is connected to the top of the base (10). The lower mold base (11) has a second through hole (110) through which the press support rod (30) passes. The first through hole (100) and the second through hole (110) are coaxially arranged.

7. A drawing apparatus, characterized in that, It includes: The drawing die as described in any one of claims 1-6; A drive unit, which is connected to a plurality of the press support rods (30).

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