A convex molding mold

Abstract

The utility model provides a kind of convex molding die, including upper die plate component and lower die plate component, upper die plate component is equipped with male die forming area and located the preforming area around male die forming area, lower die plate component is equipped with the female die forming area with the position and male die forming area opposite, and it is convex processing station between male die forming area and female die forming area;In the side away from convex processing station, upper die plate component is connected with elastic pressure plate, and elastic pressure plate at least covers the male die forming area and preforming area of upper die plate component.The convex molding die is added with elastic pressure plate to avoid the process that stamping workpiece processes convex to make surrounding feature appear deformation, displacement or crack problem, improve the quality of workpiece structure.

Description

Technical Field

[0001] This utility model belongs to the field of stamping die technology, specifically relating to a convex bulge forming die. Background Technology

[0002] In the design and manufacturing of sheet metal structural parts, embossed features have become one of the most frequently used core structures due to their significant functional advantages. This feature can effectively replace traditional additional parts, flexibly serving as key components such as pads, reinforcing ribs, and corner pieces. While reducing workpiece weight and cost, it significantly improves the overall strength of the workpiece. Furthermore, through reasonable structural design, it can achieve interference avoidance, meeting the assembly and usage requirements under complex working conditions. Therefore, it is widely used in the production of sheet metal products in various industries such as automobiles, home appliances, and machinery, and is of great significance for optimizing the performance and manufacturing cost of sheet metal structural parts. However, in actual production, the embossing process for sheet metal workpieces faces stringent quality requirements. Not only must the dimensions of the embossing itself be accurate and the overall workpiece flat, but more importantly, irreversible adverse changes must not occur to the features already machined next to the embossing; otherwise, the workpiece will be scrapped or its performance will degrade. Currently, the commonly used process in the industry is soft-mold embossing. While this process has certain advantages in terms of cost and flexibility, it has significant shortcomings in processing accuracy and quality control. Problems such as feature dimensional deviations and shape deformations frequently occur due to the influence of features next to the embossing, severely restricting the production quality and efficiency of sheet metal structural parts. In-depth analysis reveals that the aforementioned problems primarily stem from inherent defects in current soft mold convex tooling. Soft mold processing cannot effectively pre-fix the material, leading to irregular stress deformation of the workpiece material during the convex forming process due to stretching. This deformation causes nearby features to shift position or change shape as the material "flows," particularly pronounced in scenarios where features around the convex cannot be adjusted for post-processing due to design or process requirements and must be processed before the convex itself. Furthermore, the degree of deformation is positively correlated with the convex height; the higher the convex height, the greater the material stretching, and the significantly increased risk and amount of deformation for surrounding features.

[0003] As can be seen from the above, how to solve the problem of deformation, displacement, and tearing of the surrounding features after the stamping of the workpiece with the convex bulge is a problem that needs to be solved by the relevant personnel. Summary of the Invention

[0004] To address the shortcomings of the prior art, this utility model provides a convex bulge forming mold. This convex bulge forming mold is equipped with an elastic bearing plate to prevent deformation, displacement, or tearing of surrounding features during the convex bulge processing of the stamped workpiece, thereby improving the quality of the workpiece structure.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a convex bulge forming mold, including an upper template assembly and a lower template assembly. The upper template assembly is provided with a punch forming area and a pre-forming area located around the punch forming area. The lower template assembly is provided with a concave forming area located opposite to the punch forming area. The punch forming area and the concave forming area are the convex bulge processing station. On the side away from the convex bulge processing station, the upper template assembly is connected to an elastic bearing plate, which at least covers the convex forming area and the preforming area of ​​the upper template assembly.

[0006] In some implementations, the resilient bearing plate is a polyurethane board.

[0007] In some implementations, the upper template assembly includes an upper clamping plate, and the upper clamping plate has an upper mold core fitted into the punch forming area; The lower template assembly includes a lower clamping plate, which has a shaping groove in the die forming area, and a lower pad is installed in the shaping groove.

[0008] In some implementations, one of the upper clamping plate and the lower clamping plate is provided with a positioning hole, and the other is provided with a positioning pin. The upper clamping plate and the lower clamping plate are connected by the positioning hole and the positioning pin.

[0009] In some implementations, the punch forming area is located in the middle of the upper clamping plate, the die forming area is located in the middle of the lower clamping plate, and the positioning hole and the positioning pin are arranged around the periphery of the punch forming area and the die forming area.

[0010] In some implementations, the upper clamping plate is provided with positioning holes in at least four different positions around the periphery of the punch forming area, and the lower clamping plate is provided with positioning pins that correspond one-to-one with the different positioning holes around the periphery of the die forming area.

[0011] In some implementations, the elastic bearing plate also covers the area corresponding to the positioning hole or the positioning pin of the upper template assembly.

[0012] In some implementations, the thickness of the resilient bearing plate is at least 15 mm.

[0013] In some implementations, the thickness of the upper clamping plate and the lower clamping plate is at least 4.0 mm.

[0014] In some implementations, the upper clamping plate and the lower clamping plate are steel plates.

[0015] In summary, this utility model has at least the following advantages: This utility model provides a convex bulge forming mold. This mold incorporates an elastic pressure plate to prevent deformation, displacement, or tearing of surrounding features during the convex bulge forming process of the stamped workpiece, thus improving the quality of the workpiece structure. Specifically, the upper template assembly has a punch forming area and a pre-forming area surrounding the punch forming area. The elastic pressure plate is connected to the side of the upper template assembly away from the convex bulge processing station, and at least covers both the punch forming area and the pre-forming area of ​​the upper template assembly. During the convex bulge forming process, the flattening die first contacts the elastic pressure plate, and the downward pressure from the elastic pressure plate causes the upper template assembly to be simultaneously pressurized, holding the workpiece in place and moving it downwards. The cooperation between the die forming area and the punch forming area forms the convex bulge on the workpiece. During this process, the elastic pressure plate presses down on the material surrounding the convex bulge, i.e., the portion of the workpiece relative to the pre-forming area of ​​the upper clamping plate, ensuring that the workpiece does not move, thereby preventing deformation, displacement, or tearing of the features surrounding the convex bulge. Traditional convex humping molds typically require secondary processing or additional punching dies to reduce deformation of surrounding features after stamping. However, the convex humping mold of this application helps to eliminate the need for secondary processing and additional mold development steps, effectively accelerating the production cycle, reducing costs, and improving product quality. Attached Figure Description

[0016] Figure 1 This is an exploded view of the convex bulge forming mold provided in Embodiment 1 of this utility model; Figure 2 This is an exploded view of the convex bulge forming mold provided in Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of the state of the convex bulge forming die and the workpiece before stamping, provided in Embodiment 2 of this utility model; Figure 4 This is a schematic diagram showing the state of the convex bulge forming die and the workpiece during stamping, as provided in Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the convex bulge forming mold and the workpiece after stamping, as provided in Embodiment 2 of this utility model.

[0017] Marked in the image: 100. Upper template assembly; 110. Upper clamping plate; 120. Upper mold core; 130. Positioning hole; 200. Lower template assembly; 210. Lower clamping plate; 220. Shaping groove; 230. Lower pad; 240. Positioning pin; 300. Elastic bearing plate; 400. Workpiece. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0022] For ease of understanding, it should be noted that the X-axis in the graph represents the horizontal direction, the Y-axis represents the vertical direction, and the Z-axis represents the vertical direction.

[0023] Example 1: This embodiment provides a convex bulge forming die. Through structural improvements, this convex bulge forming die can reduce or even eliminate deformation, displacement, and tearing problems of features around the convex bulge during the stamping process, thereby improving production quality and accelerating the production cycle.

[0024] For details, please see the appendix. Figure 1 The convex bulge forming mold includes an upper template assembly 100 and a lower template assembly 200. The upper template assembly 100 has a punch forming area and a pre-forming area located around the punch forming area. The lower template assembly 200 has a concave die forming area located opposite to the punch forming area. The area between the punch forming area and the concave die forming area is the convex bulge processing station.

[0025] When the punch forming area of ​​the upper template assembly 100 acts on the workpiece 400, it cooperates with the die forming area to cause the workpiece 400 to bulge towards the die forming area and form a target protrusion. The pre-forming area refers to a region on the upper template assembly 100 that corresponds to the feature structure region surrounding the target protrusion on the workpiece 400; that is, the pre-forming area corresponds to the part of the workpiece 400 that has already undergone structural processing. Alternatively, this region can also correspond to a part of the workpiece 400 that is prone to deformation during processing.

[0026] On the side away from the convex bulge processing station, the upper template assembly 100 is connected to an elastic bearing plate 300, which at least covers the convex forming area and the preforming area of ​​the upper template assembly 100.

[0027] During operation, the workpiece 400 to be processed is placed between the upper template assembly 100 and the lower template assembly 200. The convex forming mold is then placed into a universal flat die for stamping. During the convex forming process, the flat die first contacts the elastic bearing plate 300. At this time, because the elastic bearing plate 300 has a certain amount of compression and elasticity, the pressure exerted by the flat die through the elastic bearing plate 300 causes the upper template assembly 100 to be simultaneously pressurized, pressing the workpiece 400 down. Through the cooperation of the die forming area and the punch forming area, the workpiece 400 is formed into a convex shape. During this process, the elastic bearing plate 300 presses down on the material around the convex shape, i.e., the pre-forming area of ​​the workpiece 400, ensuring that the workpiece 400 does not move, thereby avoiding deformation, displacement, and tearing around the convex shape. Simultaneously, because the elastic bearing plate 300 has a large force-bearing area and more uniform force distribution, it further helps to improve the stamping quality.

[0028] Example 2: This embodiment provides a further detailed description based on Embodiment 1. Please refer to the following description. Figure 1 Based on the above, refer to Figures 2 to 4 .

[0029] The convex bulge forming mold includes an upper template assembly 100 and a lower template assembly 200. The upper template assembly 100 has a punch forming area and a pre-forming area located around the punch forming area. The lower template assembly 200 has a die forming area located opposite the punch forming area. The punch forming area and the die forming area are located between the punch forming area and the die forming area, forming the convex bulge processing station. On the side away from the convex bulge processing station, the upper template assembly 100 is connected to an elastic bearing plate 300, which at least covers the punch forming area and the pre-forming area of ​​the upper template assembly 100.

[0030] Specifically, the upper template assembly 100 includes an upper clamping plate 110, and an upper mold core 120 is fitted into the upper clamping plate 110 in the punch forming area. Preferably, the punch forming area is located in the middle of the upper clamping plate 110. In this embodiment, four upper mold cores 120 are evenly distributed on the upper clamping plate 110, and the area where the four upper mold cores 120 are located is combined to form the punch forming area, and the area around the upper mold cores 120 is the pre-forming area. The pre-forming area refers to a region on the upper template assembly 100, which has a positional correspondence with the feature structure area around the target protrusion on the workpiece 400, that is, the pre-forming area corresponds to the part of the workpiece 400 that has previously completed structural processing. In addition, this region can also correspond to the part of the workpiece 400 that is prone to deformation during processing. In different embodiments, the range of the pre-forming area can be adjusted according to the actual situation of the workpiece 400.

[0031] Furthermore, the lower template assembly 200 includes a lower clamping plate 210, which has a shaping groove 220 in the die forming area, and a lower backing plate 230 is installed in the shaping groove 220. In this embodiment, the die forming area is located in the middle of the lower clamping plate 210, and the die forming area is formed by four evenly distributed shaping grooves 220. The position of the shaping grooves 220 is adapted to the upper mold core 120, and a lower backing plate 230 is provided in each shaping groove 220.

[0032] In this embodiment, both the upper clamping plate 110 and the lower clamping plate 210 are rectangular structures. The upper clamping plate 110 and the lower clamping plate 210 are connected by locking. The locking parts are selected in the outer peripheral area of ​​the two rectangular clamping plates and are set close to the edge. Specifically, the upper clamping plate 110 has a number of positioning holes 130 distributed around the periphery of the punch forming area, and the lower clamping plate 210 has positioning pins 240 that correspond one-to-one with the different positioning holes 130 around the periphery of the die forming area, thereby realizing the locking of the upper clamping plate 110 and the lower clamping plate 210 in various directions on the horizontal plane.

[0033] It should be noted that the workpiece 400 is also provided with through holes corresponding to the positioning pin 240 and the positioning hole 130, so that the positioning pin 240 can pass through the through holes and the positioning hole 130, thereby connecting the upper clamping plate 110, the workpiece 400 and the lower clamping plate 210, and completing the positioning of the workpiece 400.

[0034] After the upper template assembly 100, workpiece 400, and lower template assembly 200 are assembled, the elastic bearing plate 300 is placed above the upper clamping plate 110, and then the convex bulge forming mold is sent into the flattening mold for stamping. It should be noted that in this embodiment, the elastic bearing plate 300 is preferably a polyurethane board, with a hardness range of Shore A10-D80. Utilizing the characteristics of polyurethane board, which combines the rigidity of plastic and the elasticity of rubber, as well as its wide hardness range and superior tensile strength, tear strength, wear resistance, oil resistance, and weather resistance compared to ordinary rubber and plastic, it protects the workpiece 400.

[0035] During the stamping process of forming a convex shape, the flattening die first contacts the elastic bearing plate 300. At this time, because the elastic bearing plate 300 possesses a certain amount of compression and elasticity, the pressure exerted by the flattening die through the elastic bearing plate 300 causes the upper die assembly 100 to be simultaneously subjected to pressure, pressing the workpiece 400 down. Through the cooperation of the die forming area and the punch forming area, the workpiece 400 is formed into a convex shape. During this process, the elastic bearing plate 300 presses down on the material surrounding the convex shape, i.e., on the portion of the workpiece 400 relative to the pre-forming area of ​​the upper clamping plate 110, ensuring that the workpiece 400 does not move, thereby avoiding deformation, displacement, and tearing around the convex shape. Simultaneously, because the elastic bearing plate 300 has a large force-bearing area and more uniform force distribution, it further helps to improve the stamping quality.

[0036] This convex hull forming die can achieve a good convex hull stamping effect, which helps to eliminate the need for secondary processing and additional mold development steps, effectively speeding up the production cycle, reducing costs, and improving product quality.

[0037] Example 3: This embodiment further optimizes the structure based on embodiment 2. Please refer to the relevant documentation. Figures 2 to 4 .

[0038] Preferably, to ensure that the elastic bearing plate 300 can fully protect the workpiece 400, the thickness of the elastic bearing plate 300 is at least 15mm. Both the upper clamping plate 110 and the lower clamping plate 210 are made of steel plate, and their thickness is at least 4.0mm. However, it is understood that in some other embodiments, the thickness of the upper clamping plate 110 and the lower clamping plate 210 is adjusted according to the target convex height to facilitate laser processing. In addition, in this embodiment, the upper mold core 120 is made of steel plate with the same thickness as the upper clamping plate 110 and is installed at the upper clamping plate 110.

[0039] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A convex bulge forming mold, characterized in that, It includes an upper template assembly (100) and a lower template assembly (200). The upper template assembly (100) is provided with a punch forming area and a pre-forming area located around the punch forming area. The lower template assembly (200) is provided with a die forming area located opposite to the punch forming area. The punch forming area and the die forming area are located at the punch forming area and the punch forming area. On the side away from the convex bulge processing station, the upper template assembly (100) is connected to an elastic bearing plate (300), which at least covers the convex forming area and the preforming area of ​​the upper template assembly (100).

2. The convex bulge forming mold according to claim 1, characterized in that, The elastic pressure plate (300) is a polyurethane board.

3. The convex bulge forming mold according to any one of claims 1-2, characterized in that, The upper template assembly (100) includes an upper clamping plate (110), and the upper clamping plate (110) has an upper mold core (120) fitted into the punch forming area; The lower template assembly (200) includes a lower clamping plate (210), the lower clamping plate (210) has a shaping groove (220) in the die forming area, and a lower pad plate (230) is installed in the shaping groove (220).

4. The convex bulge forming mold according to claim 3, characterized in that, One of the upper clamping plate (110) and the lower clamping plate (210) is provided with a positioning hole (130), and the other is provided with a positioning pin (240). The upper clamping plate (110) and the lower clamping plate (210) are connected by the positioning hole (130) and the positioning pin (240).

5. The convex bulge forming mold according to claim 4, characterized in that, The punch forming area is located in the middle of the upper clamping plate (110), the die forming area is located in the middle of the lower clamping plate (210), and the positioning hole (130) and the positioning pin (240) are arranged around the periphery of the punch forming area and the die forming area.

6. The convex bulge forming mold according to claim 5, characterized in that, The upper clamping plate (110) has positioning holes (130) at least in four different directions around the periphery of the punch forming area, and the lower clamping plate (210) has positioning pins (240) that are one-to-one with the different positioning holes (130) around the periphery of the die forming area.

7. The convex bulge forming mold according to claim 4, characterized in that, The elastic bearing plate (300) also covers the area of ​​the upper template assembly (100) corresponding to the positioning hole (130) or the positioning pin (240).

8. The convex bulge forming mold according to claim 1 or 2, characterized in that, The thickness of the elastic bearing plate (300) is at least 15 mm.

9. The convex bulge forming mold according to claim 3, characterized in that, The thickness of the upper clamping plate (110) and the lower clamping plate (210) is at least 4.0 mm.

10. The convex bulge forming mold according to claim 3, characterized in that, The upper clamping plate (110) and the lower clamping plate (210) are steel plates.

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