A piercing and blanking die provided with a blank holder
By installing an adjustable-height pressure plate device under the hammer on the punch press, the problem of warping of non-ferrous metal slabs during punching and blanking is solved, and continuous feeding of slabs and improved production efficiency are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI CHUNLEI COPPER CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-12
AI Technical Summary
During the punching and blanking process, non-ferrous metal slabs warp due to stress concentration, making it impossible to be properly fed to the unloading clamping device, thus affecting production efficiency.
An adjustable-height pressure plate device is installed below the hammer on the punch press. The pressure plate applies reverse pressure to the slab to correct warping and ensure that the slab is flat.
It effectively corrects slab warping, enables continuous slab feeding, and improves production efficiency.
Smart Images
Figure CN224346771U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the processing technology of non-ferrous metal slab materials, specifically a punching and blanking die equipped with a pressing device. Background Technology
[0002] During the punching and blanking process of non-ferrous metal slabs, stress pulls on the upper surface of the slab, and stress concentration occurs on the lower surface. When too many holes are punched, all the stress is concentrated together, causing the slab to warp. After warping, the slab cannot be fed to the blanking clamp device normally, resulting in the inability to achieve continuous feeding of the slab and affecting production efficiency.
[0003] like Figure 1 The diagram shows a schematic of an existing slab stamping device, including a hammer on a press (with a downward-facing T-slot), a lower platform on the press, and a stamping die installed between the hammer and the lower platform. The stamping die consists of two parts: the upper part is mounted on the upper hammer and has a punch embedded inside, while the lower part is mounted on the lower platform and has a die embedded inside. The copper plate passes through the middle of the punch and die. When the copper plate enters the die, it is "fed" by the feeding clamp. When the copper plate is halfway through its length, the unloading clamp (traction device) begins to "receive" it, and the unloading clamp continues to complete the feeding action of the copper plate. In the existing technology, when stamping and drilling holes in the slab, the part of the slab extending out of the die at the front end warps, preventing the copper plate from entering the unloading clamp and affecting the next processing step. Utility Model Content
[0004] This invention addresses the technical problem of slab warping during the punching and blanking process of non-ferrous metal slabs by providing a punching and blanking die pressing device.
[0005] This utility model is achieved by the following technical solution: a punching and blanking die with a pressing device, including a punch press, the punch press including a lower platform, a punch press hammer with a T-slot, and a stamping die installed in the middle section of the punch press hammer and the lower platform; a height-adjustable pressing plate is detachably installed below the front end of the punch press hammer; the lower surface of the pressing plate is a horizontal pressing surface.
[0006] This invention involves installing a pressure plate device movably below the hammer on an existing punch press. The horizontal plane at the bottom of the pressure plate corrects the deformed slab after punching. The height of the pressure plate is adjustable to ensure that the plate corrects the slab to meet the specifications.
[0007] Furthermore, the pressure plate has an inverted L-shaped structure, including a horizontal section connected to the hammer head on the punch press and a vertical section connected below the horizontal section; a pair of U-shaped grooves are opened at the left and right ends of the horizontal section, and bolts are used to connect the pressure plate and the hammer head on the punch press to achieve a detachable connection.
[0008] Furthermore, the pressure plate also includes a gasket connected to the bottom of the vertical section; the bottom of the vertical section has multiple threaded holes facing inward from the end face, and the multiple threaded holes are arranged in the left and right direction along the bottom of the vertical section; the gasket has a through hole, and the inner wall of the front end of the through hole has an internal thread that is the same as the thread of the threaded hole of the pressure plate; the vertical section and the gasket are connected by a countersunk bolt, and the end of the through hole has a flared structure to accommodate the head of the countersunk bolt.
[0009] Furthermore, there are multiple stiffening plates connecting the vertical and horizontal sections of the pressure plate.
[0010] To address the problem of slab warping during punching and blanking of non-ferrous metal slabs, which prevents them from being properly fed to the traction device and achieves continuous feeding, this invention employs a subsequent correction measure without altering the punch, die, or mold structure. A pressure plate device is added between the mold and the traction device. The pressure plate is fixed to the T-slot of the hammer on the punch press with screws and operates synchronously with the punching process. The pressure plate applies reverse pressure to the slab, restoring the warped area to its flatness. This device has a simple structure and is easy and quick to install and disassemble. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the warping of the slab after stamping.
[0012] Figure 2 This is a schematic diagram of the pressure plate structure. The device is fixed in the T-slot of the upper hammer, and the flatness of the blank is ensured by increasing or decreasing the thickness of the shims.
[0013] Figure 3 for Figure 2 Side view.
[0014] Figure 4 This is a schematic diagram of the structure of this utility model (from the upper hammer head to the lower dead center, and a schematic diagram of the pressure plate in operation). When the upper hammer head reaches the lower dead center, the mold completes the punching and blanking. At this time, the pressure plate applies reverse pressure to the blank to ensure that the warped parts are restored to straightness.
[0015] 1-Punch press lower platform, 2-Punch press hammer, 3-T-slot, 4-Stamping die, 5-Pressure plate; 51-Horizontal section, 52-Vertical section, 53-U-slot, 54-Shim, 55-Counterhead bolt, 56-Firming plate, 6-Copper plate. Detailed Implementation
[0016] The specific embodiments of this utility model are as follows.
[0017] Example 1 Figure 4As shown, a punching and blanking die equipped with a pressing device includes a punch press, the punch press includes a lower platform 1, a punch press hammer 2 with a T-slot 3, and a stamping die 4 installed on the middle section of the punch press hammer 2 and the lower platform 1; a height-adjustable pressing plate 5 is detachably installed below the front end of the punch press hammer 2; the lower surface of the pressing plate 5 is a horizontal pressing surface.
[0018] like Figure 2 , 3 As shown, the pressure plate 5 has an inverted L-shaped structure, including a horizontal section 51 connected to the hammer head 2 on the punch press and a vertical section 52 connected below the horizontal section 51; the left and right ends of the horizontal section 51 (here, left and right are...) Figure 4 The pressure plate 5 (perpendicular to the paper plane) has a pair of U-shaped grooves 53. These grooves 53 and T-shaped grooves 3 on the hammer head 2 of the punch press are connected to the pressure plate 5 via bolts for a detachable connection. The pressure plate 5 also includes a gasket 54 connected to the bottom of the vertical section 52. Multiple threaded holes are formed from the end face inwards at the bottom of the vertical section 52, arranged horizontally along the bottom of the vertical section 52. The gasket 54 has a through hole, with an internal thread on the inner wall of the front end of the through hole identical to the threaded hole in the pressure plate 5. The vertical section 52 and the gasket 54 are connected by countersunk bolts 55. The end of the through hole has an flared structure to accommodate the head of the countersunk bolt 55, ensuring the bottom surface of the gasket is horizontal. Gaskets of different thicknesses can be prefabricated for quick replacement during application. Multiple stiffening plates 56 connect the vertical section 52 and the horizontal section 51 of the pressure plate 5 to strengthen the structural strength of the horizontal section 51. Figure 2 It can be seen that the vertical section 52 is located between the two U-shaped grooves on the left and right, and the stiffening plate 56 is also located between the two U-shaped grooves. The bottom of the vertical section 52 has multiple threaded holes, facilitating connection with a washer whose length and width are roughly the same as the bottom of the vertical section. It should be noted that, due to... Figure 2 To better demonstrate the structure of pressure plate 5, [the following was not used] and Figure 4 It is drawn from the main viewpoint during installation, therefore... Figure 2 Related Figure 3 In the middle, the horizontal segment and the vertical segment are in opposite positions.
[0019] The width of the horizontal section should generally cover the entire width of the copper plate to ensure the correction effect.
[0020] This utility model is applied in the following manner:
[0021] 1. Fix the pressing device to the T-slot of the upper hammer head with screws.
[0022] 2. During the stamping process, the pressure plate is completed synchronously with the stamping process, and the pressure plate applies reverse pressure to the blank.
[0023] 3. If the pressure plate is too high, it will cause the slab to be over-pressed, resulting in reverse deformation and the slab to tilt downwards. In this case, the thickness of the pressure plate shim needs to be reduced until the slab is straight.
[0024] 4. After the billet is straightened, it is automatically fed to the unloading clamp device to realize continuous feeding and stamping of the billet.
Claims
1. A punching and blanking die equipped with a pressing device, comprising a punch press, the punch press including a lower platform (1), a punch press hammer (2) with a T-slot (3), and a stamping die (4) installed in the middle section of the punch press hammer (2) and the lower platform (1); characterized in that, A height-adjustable pressure plate (5) is detachably installed below the front end of the hammer (2) on the punch press; the lower surface of the pressure plate (5) is a horizontal pressure surface.
2. A punching and blanking die with a pressing device as described in claim 1, characterized in that, The pressure plate (5) has an inverted L-shaped structure, including a horizontal section (51) connected to the hammer head (2) on the punch press and a vertical section (52) connected below the horizontal section (51); a pair of U-shaped grooves (53) are opened at the left and right ends of the horizontal section (51), and the U-shaped grooves (53) and the T-shaped grooves (3) on the hammer head (2) on the punch press are connected by bolts to achieve a detachable connection between the pressure plate (5) and the hammer head (2) on the punch press.
3. A punching and blanking die with a pressing device as described in claim 2, characterized in that, The pressure plate (5) also includes a gasket (54) connected to the bottom of the vertical section (52); the bottom of the vertical section (52) has multiple threaded holes facing inward from the end face, and the multiple threaded holes are arranged in the left and right directions along the bottom of the vertical section (52); the gasket (54) has a through hole, and the inner wall of the front end of the through hole has an internal thread that is the same as the thread of the threaded hole of the pressure plate (5); the vertical section (52) and the gasket (54) are connected by a countersunk bolt (55), and the end of the through hole has an flared structure to accommodate the head of the countersunk bolt (55).
4. A punching and blanking die with a pressing device as described in claim 3, characterized in that, There are multiple stiffening plates (56) connecting the vertical section (52) and the horizontal section (51) of the pressure plate (5).