A lower type of inclined wedge structure of a punch press
Patent Information
- Application Number
- CN202522419328.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-13
AI Technical Summary
一些汽车冲压零件具有负角(又称倒扣)结构，即与开模方向(或冲压方向)形成反向倾斜、无法直接通过直线脱模的局部结构，在进行冲压加工时，普通冲压模具的成型和脱模依赖直线运动，例如凸模下行成型、上行脱模，无法对零件产品进行侧向冲压，以实现负角结构的成型，也无法实现负角结构的顺利脱离，零件产品与模具之间产生干涉，无法沿正常方向直接分开取出，需要特殊的模具结构才能成型和脱模
[0010]上模与下模合模时，上模带动插刀驱动块和对顶块下移，插刀驱动块的驱动斜面与滑动块的从动斜面配合，向左推动滑动块在下模上滑动，以带动冲头朝向成型滑块移动，而对顶块压紧在成型滑块顶部，冲头上的第一成型工作面与成型滑块上的第二成型工作面配合实现对产品的侧向冲压，实现负角结构的成型；上模与下模开模时，上模带动插刀驱动块和对顶块上移，插刀驱动块离开滑动块，滑动块在第一复位弹簧的弹力作用下带动冲头向右移动复位，对顶块离开成型滑块，成型滑块在第二复位弹簧的弹力作用下沿斜向滑槽斜向上远离冲头运动，此时成型滑块的第二成型工作面斜向上逐渐远离产品的负角区域，避免第二成型工作面的成型结构与产品产生干涉，保证产品能够顺利脱料。
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Figure CN224824214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stamping die technology, and in particular to a lower-positioned wedge structure for stamping dies. Background Technology
[0002] Automotive stamping parts refer to automotive components manufactured through stamping processes. These are metal stampings that constitute automotive parts, formed from sheet metal through processes such as stamping, bending, and stretching using stamping dies. Some automotive stamping parts have a negative angle (also known as an undercut) structure, which is a local structure that is tilted in the opposite direction to the mold opening direction (or stamping direction) and cannot be directly demolded in a straight line. During stamping, the forming and demolding of ordinary stamping dies rely on linear motion, such as the punch forming downwards and demolding upwards. It is impossible to perform lateral stamping on the part to achieve the forming of a negative angle structure, nor can it achieve smooth separation of the negative angle structure. Interference occurs between the part and the die, making it impossible to separate and remove it directly in the normal direction. Special die structures are required for forming and demolding. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a lower-positioned wedge structure for stamping dies, which can perform lateral stamping and realize the normal forming and smooth unloading of negative angle structures of parts.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] A bottom-mounted wedge structure for a stamping die includes an upper die and a lower die. The upper die is equipped with a cutter drive block and a counterweight block, with a drive ramp at the bottom of the cutter drive block. The lower die has a sliding block slidably connected below the cutter drive block, with a first return spring at its bottom and a driven ramp matching the drive ramp. A punch is located on the side of the sliding block away from the cutter drive block, with a first forming working surface on the punch. A fixed seat is fixedly connected to the lower die below the counterweight block, with an inclined groove on the side of the fixed seat near the punch. A forming slider is slidably connected to the inclined groove, with a second return spring at its bottom and a second forming working surface opposite to the first forming working surface. When the die is closed, the cutter drive block and the counterweight block move downwards. The cutter drive block pushes the sliding block on the lower die toward the forming slider and performs lateral stamping on the product. The counterweight block presses against the top of the forming slider.
[0006] In some embodiments, the inclined groove is a dovetail groove, and the forming slider is provided with a dovetail guide rail that is slidably connected to the inclined groove.
[0007] In some embodiments, the angle between the inclined slide and the bottom surface of the fixed seat is less than 90 degrees.
[0008] In some embodiments, a limiting groove is opened in the middle of the bottom of the inclined slide, and the longitudinal section of the limiting groove is a right trapezoid; a right-angled triangular limiting plate is provided on the dovetail guide rail, the limiting plate is slidably connected to the limiting groove, and a gap is reserved between the limiting plate and the bottom of the limiting groove. When the dovetail guide rail slides obliquely upward along the inclined slide rail for a certain distance, the limiting plate abuts against the bottom of the limiting groove to limit the forming slider.
[0009] Compared with the prior art, this utility model achieves at least the following beneficial effects:
[0010] When the upper and lower dies close, the upper die drives the insert drive block and the counter block to move downwards. The driving inclined surface of the insert drive block cooperates with the driven inclined surface of the sliding block, pushing the sliding block to the left to slide on the lower die, thereby driving the punch to move towards the forming slider. Meanwhile, the counter block presses against the top of the forming slider. The first forming working surface of the punch cooperates with the second forming working surface on the forming slider to achieve lateral punching of the product, realizing the forming of the negative angle structure. When the upper and lower dies open, the upper die drives the insert drive block and the counter block to move upwards. The insert drive block leaves the sliding block, and the sliding block, under the elastic force of the first return spring, drives the punch to move to the right to reset. The counter block leaves the forming slider, and the forming slider, under the elastic force of the second return spring, moves obliquely upwards along the inclined groove away from the punch. At this time, the second forming working surface of the forming slider gradually moves obliquely upwards away from the negative angle area of the product, avoiding interference between the forming structure of the second forming working surface and the product, ensuring that the product can be smoothly ejected. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;
[0012] Figure 2 This is an exploded view of an embodiment of this application;
[0013] Figure 3 This is a schematic diagram of the connection structure between the fixed base and the forming slider in an embodiment of this application.
[0014] The numbers in the diagram are as follows: 1. Insertion drive block; 11. Drive inclined surface; 12. Return groove; 2. Top block; 3. Sliding block; 31. Driven inclined surface; 32. Protrusion; 4. First return spring; 5. Punch; 51. First forming working surface; 6. Fixed seat; 61. Inclined slide groove; 62. Limiting groove; 7. Forming slider; 71. Second forming working surface; 72. Dovetail guide rail; 73. Limiting plate; 8. Second return spring; 9. Support block; 91. First wear-resistant plate; 10. Guide plate; 101. Guide step; 20. Second wear-resistant plate; 30. Forced return hook; 40. Product. Detailed Implementation
[0015] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.
[0016] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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. 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 one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0017] like Figures 1-3As shown in the embodiment of this application, a lower wedge structure for a stamping die includes an upper die and a lower die. A cutter drive block 1 and a counterweight block 2 are mounted on the upper die. The cutter drive block 1 has a driving inclined surface 11 at its lower part. A sliding block 3 is slidably connected to the lower die below the cutter drive block 1. A first return spring 4 is provided at the bottom of the sliding block 3 to reset the sliding block 3. The sliding block 3 has a driven inclined surface 31 that matches the driving inclined surface 11. A punch 5 is provided on the side of the sliding block 3 away from the cutter drive block 1. The punch 5 has a first forming working surface 51. The lower die is fixedly connected to the counterweight block 2 below it. There is a fixed base 6, and an inclined slide groove 61 is provided on the side of the fixed base 6 near the punch 5. The inclined slide groove 61 is slidably connected to the forming slide block 7. The bottom of the forming slide block 7 is provided with a second return spring 8, which is used to reset the forming slide block 7. The forming slide block 7 is provided with a second forming working surface 71 opposite to the first forming working surface 51. When the upper mold and the lower mold are closed, the insert drive block 1 and the top block 2 move downward. The insert drive block 1 pushes the slide block 3 to move toward the forming slide block 7 on the lower mold and perform lateral punching on the product 40, while the top block 2 presses against the top of the forming slide block 7 to ensure that the product 40 can be smoothly completed for lateral punching.
[0018] Preferably, the inclined slide 61 is a dovetail groove, and the forming slider 7 is provided with a dovetail guide rail 72 that is slidably connected to the inclined slide 61. The dovetail groove and the dovetail guide rail 72 are closely matched by the inclined surfaces on both sides to form a unique relative motion trajectory, which can strictly limit other degrees of freedom except along the groove direction and ensure the motion accuracy of the forming slider 7.
[0019] Furthermore, the angle between the inclined slide 61 and the bottom surface of the fixed seat 6 is less than 90 degrees, so that when the upper and lower molds open, the forming slider 7 can be reset obliquely upward away from the punch 5 under the elastic force of the second return spring 8, thereby driving the product 40 to move obliquely upward away from the punch 5, ensuring the smooth unloading of the product 40.
[0020] Furthermore, a limiting groove 62 is opened in the middle of the bottom of the inclined slide 61, and the longitudinal section of the limiting groove 62 is a right trapezoid. A right-angled triangular limiting plate 73 is provided on the dovetail guide rail 72. The limiting plate 73 is slidably connected to the limiting groove 62, and a gap is reserved between the limiting plate 73 and the bottom of the limiting groove 62. So when the upper mold and the lower mold open, according to the size of the reserved gap, after the dovetail guide rail 72 slides obliquely upward along the inclined slide 61 for a certain distance, the left end face of the limiting plate 73 contacts the bottom of the limiting groove 62. The left end face of the limiting plate 73 abuts against the bottom of the limiting groove 62, thereby preventing the forming slider 7 from continuing to slide obliquely upward, thus achieving the limiting of the forming slider 7.
[0021] A downwardly protruding connecting block is vertically fixed to the bottom of the sliding block 3; the connecting block is not shown in the figure. Preferably, the first return spring 4 is a nitrogen spring, which is mounted on the lower mold along the sliding direction of the sliding block 3, and the piston rod of the first return spring 4 abuts against the connecting block. Preferably, the second return spring 8 is a nitrogen spring, which is obliquely mounted on the lower mold, and the piston rod of the second return spring 8 abuts against the bottom of the forming slider 7.
[0022] A support block 9 is also installed on the lower mold. The support block 9 is located beside the driven inclined surface 31, and a first wear-resistant plate 91 is fixedly connected to the support block 9. When the insert drive block 1 moves downward, its side away from the drive inclined surface 11 contacts the surface of the first wear-resistant plate 91. A second wear-resistant plate 20 is also fixedly connected to the lower mold, and the second wear-resistant plate 20 contacts the bottom surface of the sliding block 3.
[0023] Guide plates 10 are fixedly connected to the lower mold on the front and rear sides of the sliding block 3. Guide plates 10 are provided with guide steps 101 along the sliding direction of the sliding block 3. The bottom front and rear sides of the sliding block 3 are provided with protrusions 32 along the sliding direction. The protrusions 32 are slidably connected to the guide steps 101 to ensure the movement accuracy of the sliding block 3.
[0024] The front and rear sides of the insert drive block 1 are provided with inclined return grooves 12; the front and rear sides of the sliding block 3 are provided with forced return hooks 30. One end of the forced return hook 30 is fixedly connected to the sliding block 3, and the other end is slidably connected to the return groove 12. By setting the first reset spring 4 and the forced return hook 30, the accurate reset of the sliding block 3 can be ensured when the upper mold and the lower mold open.
[0025] The working process of this utility model is as follows:
[0026] When the upper and lower molds close, the upper mold drives the insert drive block 1 and the counterweight block 2 downwards. The driving inclined surface 11 of the insert drive block 1 cooperates with the driven inclined surface 31 of the sliding block 3, pushing the sliding block 3 to the left to slide on the lower mold, thereby driving the punch 5 to move towards the forming slider 7. Meanwhile, the counterweight block 2 presses against the top of the forming slider 7. The first forming working surface 51 on the punch 5 cooperates with the second forming working surface 71 on the forming slider 7 to achieve lateral punching of the product 40. When the upper and lower molds open, the upper mold drives the insert drive block 1 and the counterweight block 2 upwards. The insert drive block 1 moves away from the sliding block 3. Under the elastic force of the first return spring 4, the sliding block 3 drives the punch 5 to move to the right to reset. 2. After leaving the forming slider 7, the forming slider 7 moves obliquely upward away from the punch 5 along the inclined slide groove 61 under the elastic force of the second return spring 8. At this time, the second forming working surface 71 on the forming slider 7 gradually moves obliquely upward away from the negative angle area on the product 40, so as to avoid interference between the forming structure of the second forming working surface 71 and the negative angle structure of the product 40, and ensure that the product 40 can be smoothly unloaded. This allows the product 40 strip to be smoothly lifted by the floating material structure such as the floating material plate conventionally set on the lower mold, and the product 40 strip to be transported to the next station by the feeding mechanism such as the roller feeder conventionally set on the mold. This application will not elaborate on the specific structural composition of the floating material structure and the feeding mechanism.
[0027] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A lower-positioned wedge structure for a stamping die, comprising an upper die and a lower die, characterized in that: The upper mold is equipped with a cutting tool drive block and a top block, and the lower part of the cutting tool drive block is provided with a drive slope. A sliding block is slidably connected to the lower die below the insert drive block. A first return spring is provided at the bottom of the sliding block. A driven inclined surface matching the drive inclined surface is provided on the sliding block. A punch is provided on the side of the sliding block away from the insert drive block. A first forming working surface is provided on the punch. A fixed seat is fixedly connected to the lower die below the top block. An inclined groove is provided on the side of the fixed seat near the punch. A forming slider is slidably connected to the inclined groove. A second return spring is provided at the bottom of the forming slider. A second forming working surface opposite to the first forming working surface is provided on the forming slider. When the mold is closed, the insert drive block and the top block move downwards. The insert drive block pushes the sliding block to move toward the forming slider on the lower mold and performs lateral punching on the product. The top block presses against the top of the forming slider.
2. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: The inclined groove is a dovetail groove, and the forming slider is provided with a dovetail guide rail that is slidably connected to the inclined groove.
3. The lower-positioned wedge structure of the stamping die according to claim 2, characterized in that: The angle between the inclined slide and the bottom surface of the fixed seat is less than 90 degrees.
4. The lower-positioned wedge structure of the stamping die according to claim 2, characterized in that: The inclined slide has a limiting groove in the middle of its bottom, and the longitudinal section of the limiting groove is a right trapezoid. The dovetail guide rail is provided with a limiting plate in the shape of a right triangle. The limiting plate is slidably connected to the limiting groove, and a gap is reserved between the limiting plate and the bottom of the limiting groove. When the dovetail guide rail slides a certain distance upward along the inclined slide, the limiting plate abuts against the bottom of the limiting groove to limit the forming slider.
5. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: The bottom of the sliding block is vertically fixedly connected to a downward protruding connecting block; the first reset spring is a nitrogen spring, which is installed on the lower mold along the sliding direction of the sliding block, and the piston rod of the first reset spring abuts against the connecting block.
6. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: The second reset spring is a nitrogen spring, which is obliquely mounted on the lower mold, and the piston rod of the second reset spring abuts against the bottom of the forming slider.
7. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: A support block is also installed on the lower mold. The support block is located beside the driven inclined surface, and a first wear-resistant plate is fixedly connected to the support block. When the insert drive block moves downward, the side away from the drive inclined surface contacts the surface of the first wear-resistant plate.
8. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: Guide plates are fixedly connected to the lower mold on the front and rear sides of the sliding block. Guide steps are provided on the guide plates along the sliding direction of the sliding block. Protrusions are provided on the front and rear sides of the bottom of the sliding block along the sliding direction. The protrusions are slidably connected to the guide steps.
9. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: A second wear-resistant plate that contacts the bottom surface of the sliding block is also fixedly connected to the lower mold.
10. The lower-positioned wedge structure of the stamping die according to claim 1, characterized in that: The front and rear sides of the insert drive block are provided with inclined return grooves; the front and rear sides of the sliding block are provided with forced return hooks, one end of which is fixedly connected to the sliding block and the other end is slidably connected to the return groove.