A bending mold
By designing a bending forming mold that includes an upper mold base, a lower mold base, a first bending component, and a second bending component, the problem of requiring two processes for 45-degree bending of traditional sheet metal parts was solved. This allows for the completion of 90-degree and 45-degree bending in a single mold, improving production efficiency and forming accuracy while reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI GREE PRECISION MOLD CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional sheet metal parts require two processes to bend at a 45-degree angle, which increases the number of molds and production costs, and reduces production efficiency.
Design a bending forming mold, including an upper mold base, a lower mold base, a first bending component and a second bending component. The two sets of bending components complete 90-degree and 45-degree bending in one mold, reducing the number of process steps and improving production efficiency and forming dimensional accuracy.
Completing 90-degree and 45-degree bends of sheet metal parts in a single mold reduces production steps, lowers production costs, and improves production efficiency and part forming accuracy.
Smart Images
Figure CN224525676U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, and in particular to a bending forming mold. Background Technology
[0002] Bending the edges of sheet metal parts at a 45-degree angle is a common forming process feature. The traditional forming method involves first bending the flat surface 90 degrees to complete the 90-degree bend, and then bending it from 90 degrees to 45 degrees to complete the 45-degree bend. This requires two steps and two sets of molds to complete the 45-degree bend. This processing method not only increases the number of mold steps but also raises the production cost of the stamping process and reduces production efficiency. Utility Model Content
[0003] The purpose of this utility model is to provide a bending forming mold to solve the technical problems in the prior art that require two processes to complete the 45-degree bending forming of sheet metal parts, which is time-consuming, labor-intensive, and costly.
[0004] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides a bending forming mold, including an upper mold base, a lower mold base, a first bending component, and a second bending component; wherein: The first bending assembly is disposed between the upper die base and the lower die base for bending the part to be formed at a 90-degree angle. The second bending assembly is disposed between the lower die base and the first bending assembly, and is used to bend the part at a 45-degree angle at a 90-degree bending position.
[0005] The bending forming mold provided by this utility model sets two sets of bending components. One set of bending components is used to form a 90-degree bend, and the other set of bending components is used to continue bending on the basis of the 90-degree bend to form a 45-degree bend structure. This reduces the traditional two-step forming of the 45-degree bend part to one-step forming, reducing the number of production steps, improving production efficiency and the forming dimensional accuracy of the parts. The two steps are completed in one mold, reducing the number of molds and lowering production costs.
[0006] Based on the above technical solution, the present invention can be further improved as follows.
[0007] As a further improvement of this utility model, the first bending assembly includes an upper die pressure plate, a first bending punch, a lower stripper plate, and a lower die ejection oblique slider; wherein: The upper die pressing plate is movably mounted on the upper die base via a first elastic element; The first bending punch is movably mounted on the upper die holder via a second elastic element; The lower stripper plate is movably mounted on the lower die base via a third elastic element; The lower die ejection slider is movably mounted on the lower die base via a fourth elastic element.
[0008] The upper die pressing plate, the first bending punch, the lower stripper plate, and the lower die ejection slider are installed by elastic components, so that each component can retract after being pressed, and the bending structure of the part can be formed by the closing and opening of the upper and lower dies.
[0009] As a further improvement of this utility model, the elastic force of the third elastic element is greater than the sum of the elastic force of the first elastic element and the bending force when the part is bent at 90 degrees.
[0010] With this structural design, when the upper die pressure plate presses down on the lower die ejection slider, the lower die ejection slider is pressed down to a position parallel to the lower stripper plate. Then, because the elastic force of the third elastic element is greater than that of the first elastic element, as the upper die continues to press down, the upper die pressure plate will retract under the compression of the first elastic element. The first bending punch continues to move down and bends the exposed part that needs to be bent by 90 degrees, starting the forming action. Because the elastic force of the third elastic element is greater than the sum of the bending force of the first elastic element and the bending force of the part, the lower die can remain stationary. As the upper die continues to press down, the 90-degree bending operation is finally completed.
[0011] As a further improvement of this utility model, the elastic force of the first elastic element is greater than that of the fourth elastic element.
[0012] This structural design allows the lower die ejector slider to be pushed down during the pressing of the upper die pressure plate, thus ejecting the material into place and completing the 90-degree bending forming process.
[0013] As a further improvement of this utility model, the second bending assembly includes a second bending punch, a first bending inclined surface, and a second bending inclined surface; wherein: The second bending punch is fixed on the lower die base; The first bending bevel is disposed on one side of the top of the second bending punch; The second bending slope is located on one side of the top of the lower die ejection slider.
[0014] By setting two bending slopes, the downward upper die pressure plate pushes the lower stripper plate and the lower die ejector slide together downward. The second bending slope of the lower die ejector slide forms a folding turn with the first bending slope of the second bending punch at the 90-degree bend position of the part, and finally achieves the effect of folding the edge at 45°. Thus, the process of bending the edge from 90° to 45° can be completed simultaneously using one die.
[0015] As a further improvement of this utility model, both the first bending slope and the second bending slope are 45-degree slopes.
[0016] As a further improvement of this utility model, the elastic force of the second elastic element and the third elastic element is less than the machine tool pressure.
[0017] As a further improvement of this utility model, the first elastic element is a spring; and / or, the second elastic element and the third elastic element are nitrogen springs; and / or, the fourth elastic element is a top pin.
[0018] This invention designs the molding structure as a movable inclined slider. By designing the difference in pressing and unloading forces of each molding block, molding is carried out in steps. These two steps are completed in one mold, reducing the number of production steps, improving production efficiency and the molding dimensional accuracy of the parts.
[0019] As a further improvement of this utility model, the side of the lower die ejection slider that contacts the lower stripper plate is an inclined surface, so that when the lower die ejection slider moves downward, it can move closer to the side of the second bending component under the action of the inclined surface.
[0020] As a further improvement of this utility model, it also includes a lower clamping plate, the second bending punch is fixed on the lower clamping plate, and the lower clamping plate is fixed on the lower die base.
[0021] This utility model's bending forming die redesigns the original fixed forming block into a slanted slider that can move obliquely. The 90° bending punch of the upper die is also made to move up and down, supported by a nitrogen spring at the back. The entire lower die is also made into a floating die that can move up and down. The ejection force of the lower die is greater than the forming force of the initial 90° bend. Therefore, the 90° bend can be completed first during the downward pressing of the upper die, and the final 45° inward bend is completed when the die is in place, achieving the retraction and material removal of the slanted slider. Furthermore, this process can also fulfill various needs such as straight edge overlapping, arc overlapping, and irregular edge overlapping. It only requires accurate calculation of the force comparison required for each forming step according to different forming structures, which allows for widespread application. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1This is a schematic diagram of the bending forming mold of this utility model in the open state; Figure 2 yes Figure 1 Enlarged view of part A in the middle; Figure 3 This is a schematic diagram of the bending forming mold of this utility model when it is in the position of just contact when the mold is closed; Figure 4 yes Figure 3 Enlarged view of part B in the middle; Figure 5 This is a schematic diagram of the bending forming mold of this utility model when it is in the first 90-degree bend after mold closing; Figure 6 yes Figure 5 Enlarged view of part C; Figure 7 This is a schematic diagram of the bending forming mold of this utility model when it is in the second 45-degree bend after mold closing; Figure 8 yes Figure 7 Enlarged view of part of D; Figure 9 This is a schematic diagram of the bending forming mold of this utility model in the demolding state; Figure 10 yes Figure 9 Enlarged view of part of E in the middle; Figure 11 This is a schematic diagram of the structure of the first bending punch and the second elastic element in the bending forming mold of this utility model; Figure 12 This is a schematic diagram of the structure of the lower die ejection slider and the fourth elastic element in the bending forming mold of this utility model; Figure 13 This is a product image of the bending and forming mold of this utility model after the first bending is completed; Figure 14 This is a product image after the bending and forming mold of this utility model has completed the second bending.
[0024] In the picture: 1. Upper mold base; 2. Nitrogen spring for upper die bending punch; 3. Upper mold pressure plate spring; 4. First bending punch; 5. Install the upper clamp; 6. Upper mold pressing plate; 7. Parts; 8. Lower die ejection slant slide; 9. Second bending punch; 10. Lower stripper plate; 11. Lower stop plate; 12. Lower clamping plate; 13. Lower mold base; 14. Unloading slider ejector pin; 15. Nitrogen spring for lower mold. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] like Figures 1-14 As shown, this utility model provides a bending forming mold, including an upper mold and a lower mold; the upper mold and the lower mold include an upper mold base 1, a lower mold base 13, a first bending assembly, and a second bending assembly; wherein: The first bending assembly is disposed between the upper mold base 1 and the lower mold base 13, and is used to bend the part 7 to be formed by 90 degrees when the mold is closed. The second bending assembly is disposed between the lower mold base 13 and the first bending assembly, and is used to perform a 45-degree bend on the 90-degree bending position of part 7 by means of the second bending assembly and the first bending assembly together when the mold is closed.
[0027] The bending forming mold provided by this utility model sets two sets of bending components. One set of bending components is used to form a 90-degree bend, and the other set of bending components is used to continue bending on the basis of the 90-degree bend to form a 45-degree bend structure. This reduces the traditional two-step forming process of the 45-degree bend part 7 to one-step forming, reducing the number of production steps, improving production efficiency and the forming dimensional accuracy of part 7. The two steps are completed in one mold, reducing the number of molds and lowering production costs.
[0028] Specifically, in this embodiment, the first bending assembly includes an upper die pressure plate 6, a first bending punch 4, a lower stripper plate 10, and a lower die ejection slider 8; wherein: The upper die pressing plate 6 is movably mounted on the upper die base 1 via a first elastic element; furthermore, the first elastic element can be an upper die pressing plate spring 3; The first bending punch 4 is movably mounted on the upper die base 1 via a second elastic element; furthermore, the second elastic element can be a nitrogen spring 2 for the upper die bending punch. The lower stripper plate 10 is movably mounted on the lower mold base 13 via a third elastic element; furthermore, the third elastic element can be a lower mold nitrogen spring 15; The lower die ejection slider 8 is movably mounted on the lower die base 13 via a fourth elastic element; furthermore, the fourth elastic element can be the ejection slider ejector pin 14.
[0029] It should be noted that the first, second, third, and fourth elastic components are all implemented using existing technology products. However, when selecting specifications, it is necessary to select products with the corresponding elastic force according to the needs. Since the elastic components are all existing technology products and are commonly used structures in molds, they will not be described in detail.
[0030] The upper die pressing plate 6, the first bending punch 4, the lower stripper plate 10, and the lower die ejection slider 8 are installed by elastic components, so that each component can retract after being pressed, and the bending structure of part 7 can be formed by the mold closing and opening between the upper and lower dies.
[0031] To ensure the smooth formation of the 90-degree bend, the design requirements in this embodiment are as follows: the elastic force of the third elastic element must be greater than the sum of the elastic force of the first elastic element and the bending force when part 7 is bent at a 90-degree angle. Therefore, when selecting the third elastic element, it is necessary to ensure that its elastic force is sufficient to prevent the lower die from shifting downwards when the upper die pressure plate 6 is pressed down during the 90-degree bend, thus ensuring the smooth execution of the 90-degree bend.
[0032] With this structural design, when the upper die pressure plate 6 presses down on the lower die ejection slider 8, the lower die ejection slider 8 is pressed down and moved to a position parallel to the lower stripper plate 10. Then, because the elastic force of the third elastic element is greater than that of the first elastic element, as the upper die continues to press down, the upper die pressure plate 6 will retract under the compression of the first elastic element. The first bending punch 4 continues to move down and bends the exposed part 7 that needs to be bent by 90 degrees, starting the forming action. Because the elastic force of the third elastic element is greater than the sum of the bending force of the first elastic element and the bending force of part 7, the lower die can remain stationary. As the upper die continues to press down, the 90-degree bending work is finally completed.
[0033] To ensure the smooth execution of the 90-degree bend, the design requirements in this embodiment are as follows: the elastic force of the first elastic element is greater than that of the fourth elastic element.
[0034] With this structural design, during the pressing process of the upper die pressure plate 6, the lower die ejection slider 8 will be pushed down to achieve ejection and complete the 90-degree bending forming state.
[0035] As an optional embodiment of this utility model, the second bending assembly includes a second bending punch 9, a first bending inclined surface, and a second bending inclined surface; wherein: The second bending punch 9 is fixed on the lower die base 13; The first bending slope is set on one side of the top of the second bending punch 9; The second bending slope is set on one side of the top of the lower die ejection slider 8.
[0036] By setting two bending slopes, the downward upper die pressure plate 6 pushes the lower stripper plate 10 and the lower die ejector slider 8 downward together. The second bending slope of the lower die ejector slider 8 forms a folding edge turn at the 90-degree bending position of the part 7 and the first bending slope of the second bending punch 9, ultimately achieving the effect of a 45° folding edge. Thus, the process of bending from 90° to 45° edge is completed simultaneously using one die.
[0037] As a further improvement of this utility model, both the first bending slope and the second bending slope are 45-degree slopes.
[0038] As a further improvement of this utility model, the elastic force of the second and third elastic elements is less than the machine tool pressure. It should be noted that the machine tool pressure here refers to the machine tool force that drives the upper mold downward. The machine tool drives the upper mold to press down or move upward, thereby realizing the mold closing and opening.
[0039] As a further improvement of this utility model, the first elastic element is a spring, specifically the upper die pressing plate spring 3.
[0040] As a further improvement of this utility model, the second elastic element and the third elastic element are nitrogen springs, specifically the upper die bending punch nitrogen spring 2 and the lower die nitrogen spring 15, respectively.
[0041] As a further improvement of this utility model, the fourth elastic element is a top pin, specifically, the top pin 14 of the ejector slider.
[0042] This utility model designs the molding structure as a movable inclined slider. By designing the difference in the pressing and unloading forces of each molding block, the molding is carried out in steps. These two steps are completed in one mold, which reduces the number of production process steps, improves production efficiency and the molding dimensional accuracy of part 7.
[0043] As a further improvement of this utility model, the side of the lower die ejection slider 8 that contacts the lower stripper plate 10 is an inclined surface, so that when the lower die ejection slider 8 moves downward, it can move closer to the side of the second bending component under the action of the inclined surface.
[0044] As a further improvement of this utility model, it also includes a lower clamping plate 12, the second bending punch 9 is fixed on the lower clamping plate 12, and the lower clamping plate 12 is fixed on the lower mold base 13.
[0045] Specifically, it also includes an upper clamping plate 5 and a lower stop plate 11; the upper clamping plate 5 is located between the upper mold base 1 and the upper mold pressure plate 6, and the upper mold pressure plate spring 3 passes through the upper clamping plate 5 and is connected to the upper mold base 1. The lower stop plate 11 is located between the lower stripper plate 10 and the lower clamping plate 12.
[0046] This utility model's bending forming die redesigns the original fixed forming block into a slanted slider that can move obliquely. The 90° bending punch of the upper die is also made to move up and down, supported by a nitrogen spring at the back. The entire lower die is also made into a floating die that can move up and down. The ejection force of the lower die is greater than the forming force of the initial 90° bend. Therefore, the 90° bend can be completed first during the downward pressing of the upper die, and the final 45° inward bend is completed when the die is in place, achieving the retraction and material removal of the slanted slider. Furthermore, this process can also fulfill various needs such as straight edge overlapping, arc overlapping, and irregular edge overlapping. It only requires accurate calculation of the force comparison required for each forming step according to different forming structures, which allows for widespread application.
[0047] Processing method: The processing method of the bending forming mold of this utility model will be described in detail below with reference to the accompanying drawings: Figure 1 As shown, this is the initial state before molding. At this time, the upper and lower molds are in the open state. Subsequently, the upper mold moves downward. During the downward pressing process, the upper mold pressure plate 6 in its middle part first contacts the lower mold ejection slider 8. Since the pressing force of the upper mold pressure plate 6 is greater than the ejection force of the ejection slider ejector pin 14, the lower mold ejection slider 8 ejects into place first. Figure 3 As shown, it has reached the state where it is about to be bent and shaped at 90 degrees.
[0048] As the upper die continues to press down, the upper die pressure plate 6 contacts the lower die stripper plate 10. The lower die stripper plate 10 is held in place by the lower die nitrogen spring 15, and the force is greater than that of the upper die pressure plate spring 3. Therefore, as the upper die continues to press down, the upper die pressure plate spring 3 is compressed, and the first bending punch (90-degree bending punch) 4 continues to move down, pressing down the exposed part (sheet metal) that needs to be bent, and starting the forming action. Since the force of the lower die nitrogen spring 15 is much greater than the sum of the elastic force of the upper die pressure plate spring 3 and the bending force of the part, the lower die remains stationary. During the process of the upper die continuing to press down, the first bending punch completes the 90° bending operation. Figure 5 As shown.
[0049] As the press continues to descend, the first bending punch 4 of the upper die stops moving downward after hitting the second bending punch 9. Since the back of the first bending punch 4 of the upper die is held in place by the nitrogen spring 2 of the upper die bending punch, the entire die is not pressed down (or in position) at this time. Therefore, as the press continues to descend, the nitrogen spring 2 of the upper die bending punch and the nitrogen spring 15 of the lower die are compressed under the force of the machine tool. The continued descent causes the upper die pressure plate 6 to bend the part at 90 degrees on the inclined surface of the second bending punch 9, forming a folded edge and turning, ultimately achieving a 45° folded edge effect. Thus, the process of bending from 90° to 45° edge is completed simultaneously using one die. like Figure 13The image shown is a diagram of part 7 when it has completed a 90-degree bend. Figure 14 The image shown depicts part 7 after a 45-degree bend. Figure 9 and Figure 10 As shown in the figure, there are two parts 7: one is the part that has been removed after molding, and the other is the part that has been molded but is still on the lower stripper plate. First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.
[0050] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.
[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0053] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A bending forming die, characterized in that, Includes an upper die base, a lower die base, a first bending assembly, and a second bending assembly; wherein: The first bending assembly is disposed between the upper die base and the lower die base for bending the part to be formed at a 90-degree angle. The second bending assembly is disposed between the lower die base and the first bending assembly, and is used to bend the part at a 45-degree angle at a 90-degree bending position.
2. The bending forming die according to claim 1, characterized in that, The first bending assembly includes an upper die pressure plate, a first bending punch, a lower stripper plate, and a lower die ejection slider; wherein: The upper die pressing plate is movably mounted on the upper die base via a first elastic element; The first bending punch is movably mounted on the upper die holder via a second elastic element; The lower stripper plate is movably mounted on the lower die base via a third elastic element; The lower die ejection slider is movably mounted on the lower die base via a fourth elastic element.
3. The bending forming die according to claim 2, characterized in that, The elastic force of the third elastic element is greater than the sum of the elastic force of the first elastic element and the bending force when the part is bent at 90 degrees.
4. The bending forming die according to claim 2, characterized in that, The elastic force of the first elastic element is greater than that of the fourth elastic element.
5. The bending forming die according to claim 2, characterized in that, The second bending assembly includes a second bending punch, a first bending bevel, and a second bending bevel; wherein: The second bending punch is fixed on the lower die base; The first bending bevel is disposed on one side of the top of the second bending punch; The second bending slope is located on one side of the top of the lower die ejection slider.
6. The bending forming die according to claim 5, characterized in that, Both the first and second bending slopes are 45-degree slopes.
7. The bending forming die according to claim 2, characterized in that, The elastic force of the second elastic element and the third elastic element is less than the machine tool pressure.
8. The bending forming die according to claim 2, characterized in that, The first elastic element is a spring; and / or, the second and third elastic elements are nitrogen springs; and / or, the fourth elastic element is a top pin.
9. The bending forming die according to claim 2, characterized in that, The side of the lower die ejection slider that contacts the lower stripper plate is an inclined surface, so that when the lower die ejection slider moves downward, it can move closer to the side of the second bending assembly under the action of the inclined surface.
10. The bending forming die according to claim 5, characterized in that, It also includes a lower clamping plate, on which the second bending punch is fixed, and the lower clamping plate is fixed on the lower die base.