A material lifting device for progressive die strip press forming

Abstract

This utility model relates to the technical field of stamping dies, specifically disclosing a material lifting device for progressive die strip stamping. It includes an upper die base and a lower die base. The lower die base has a rear lifting plate, which elastically moves up and down on the lower die base via a first lifting elastic element. The lower die base also has a front lifting frame, which elastically moves up and down on the lower die base via a second lifting elastic element. A rotating lifting plate is hinged to the front lifting frame. The upper die base has a driving block for pressing down and driving the rotating lifting plate to rotate. The lower die base has an elastic reset element for driving the rotating lifting plate to rotate and reset. The front lifting frame has a lifting plate insert, which corresponds to the lower side of the end of the rotating lifting plate after it has been pressed and rotated. This utility model effectively avoids the feeding jitter problem caused by single-sided strip, ensuring the stability of the product throughout the stamping process, thereby improving production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of stamping dies, and specifically discloses a material lifting device for stamping progressive die strips. Background Technology

[0002] Progressive die strip stamping is an advanced manufacturing process widely used in automotive parts manufacturing and other fields. Progressive die strip stamping equipment efficiently produces parts with complex shapes and precise dimensions by progressively feeding metal strip into a die for stamping. This equipment typically consists of an upper die holder, a lower die holder, stamping dies, and a feeding device.

[0003] However, existing progressive die strip stamping equipment still has some shortcomings in actual production. As automotive molds become increasingly advanced, product shapes and structures become more complex, forming torque is higher, and mold space is limited. Before forming, the product cannot maintain good balance, especially when using single-sided strip material, where strip vibration is particularly noticeable. Strip instability leads to inconsistent product quality, resulting in dimensional deviations, surface scratches, and other problems, affecting product yield and production efficiency. Therefore, solving the strip instability problem in existing progressive die strip stamping equipment and improving production efficiency and product quality is a pressing technical challenge. Utility Model Content

[0004] The purpose of this invention is to ensure that the product is balanced and the feeding is stable during the process of being delivered to the next process without increasing the number of workstations or adjusting the process, thereby reducing the cost of mold manufacturing and the balance between stamping production costs and feeding stability.

[0005] This utility model discloses a material lifting device for progressive die strip stamping, which adopts the following technical solution:

[0006] A lifting device for progressive die strip stamping includes an upper die base and a lower die base. The lower die base is provided with a rear lifting plate, which is elastically raised and lowered on the lower die base by a first lifting elastic element. The lower die base is provided with a front lifting frame, which is elastically raised and lowered on the lower die base by a second lifting elastic element. The front lifting frame is hinged to a rotating lifting plate. The upper die base is provided with a driving block for pressing down and driving the rotating lifting plate to rotate. The lower die base is provided with an elastic reset element for driving the rotating lifting plate to rotate and reset. The front lifting frame is provided with a lifting plate insert, which corresponds to the lower side of the end of the rotating lifting plate after it has been pressed and rotated.

[0007] Preferably, the elastic reset member includes a reset pin disposed in the front lifting frame and a spring installed in conjunction with the reset pin, the reset pin abutting against the bottom end of the rotating lifting plate.

[0008] Preferably, the end of the reset pin that contacts the rotating lifting plate is an arc surface.

[0009] Preferably, the front lifting frame is provided with a limiting pressure block, which is located on the upper side of the rotating lifting plate, and the elastic reset member drives the rotating lifting plate to reset to abut against the limiting pressure block.

[0010] Preferably, the end of the drive block that contacts the rotating lifting plate is provided with a guide slope.

[0011] Preferably, the top height of the rotating lifting plate before it is rotated under pressure is flush with the rear lifting plate.

[0012] Preferably, the front lifting frame is provided with a mounting base, and the rotating lifting plate is mounted on the front lifting frame by means of a rotating shaft provided in the mounting base. The mounting base and the lifting plate insert are detachably connected to the front lifting frame.

[0013] Preferably, the upper mold base is provided with a stripper plate, which elastically moves up and down on the upper mold base via a stripper elastic element, and the drive block is installed at the bottom of the stripper plate.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] This invention features a rotatable lifting plate and a drive block on the upper die base for pressing down and swaying the lifting plate. A lifting plate insert is also provided below the end of the lifting plate after it has been pressed and rotated. This ensures that the strip is stably supported after feeding, during the forming process, and throughout the entire process after forming. This effectively avoids feeding jitter caused by a single-sided strip, guarantees the stability of the product throughout the stamping process, significantly reduces strip twisting, and thus improves production efficiency and product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mold opening state of the material lifting device for the progressive die strip stamping process in this embodiment;

[0017] Figure 2 for Figure 1 A partial three-dimensional schematic diagram;

[0018] Figure 3 This is a schematic diagram of the lowering of the upper die base of the lifting device for progressive die strip stamping in this embodiment;

[0019] Figure 4This is a schematic diagram of the die-lifting device in the die-closing state for the progressive die strip stamping process of this embodiment.

[0020] Figure 5 for Figure 4 A partial sectional view.

[0021] Explanation of icon numbers:

[0022] 1. Upper die holder; 2. Lower die holder; 3. Stamping die; 4. Rear end lifting plate; 5. First lifting elastic element; 6. Front end lifting frame; 7. Second lifting elastic element; 8. Rotating lifting plate; 9. Rotating shaft; 10. Drive block; 11. Lifting plate insert; 12. Reset ejector pin; 13. Limiting pressure block; 14. Mounting base; 15. Stripper plate; 100. Strip material. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This utility model discloses a material lifting device for progressive die strip stamping, including an upper die base 1 and a lower die base 2. Both the upper die base 1 and the lower die base 2 are provided with opposing stamping molds 3. Existing stamping equipment generally has a rear lifting plate 4 on the lower die base 2. The rear lifting plate 4 is elastically raised and lowered on the lower die base 2 by setting a first lifting elastic element 5. So when the strip 100 is conveyed into the stamping equipment, the strip 100 is first lifted by the rear lifting plate 4 between the stamping molds 3. Then the upper die base 1 and the lower die base 2 close the mold to stamp the strip. However, due to the existence of strip vibration in the existing single-sided strip, the unstable strip affects the quality of the stamped product and is not conducive to the yield rate.

[0025] As an improvement, see Figures 1-5In this design, the lower die base 2 is equipped with a front lifting frame 6. The front lifting frame 6 and the rear lifting plate 4 are located on the front and rear sides of the material feeding path of the strip 100. When the stamping die 3 is closed, it is located between the front lifting frame 6 and the rear lifting plate 4. The front lifting frame 6 is elastically raised and lowered on the lower die base 2 by setting a second lifting elastic element 7. The front lifting frame 6 is equipped with a rotating lifting plate 8. The rotating lifting plate 8 is hinged to the front lifting frame 6 by setting a rotating shaft 9. The rotating shaft 9 is set laterally and perpendicular to the feeding direction of the strip 100, so that the rotating lifting plate 8 can rotate and swing up and down. The upper die base 1 is equipped with a driving block 10. The driving block 10 corresponds to the rotating lifting plate 8 and is used to press down and drive the rotating lifting plate 8 to rotate. The lower die base 2 is equipped with an elastic reset element for driving the rotating lifting plate 8 to rotate and reset. The front lifting frame 6 is equipped with a lifting plate insert 11, which is connected to the lower side of the end of the rotating lifting plate 8 after it is pressed and rotated. By adopting this structural design, the rotating lifting plate 8 of the rear lifting plate 4 and the front lifting frame 6 are used in conjunction to ensure that the front and rear ends of the strip 100 can be stably lifted from the time it is fed into place until it is formed. This achieves force balance of the strip before forming and effectively avoids the shaking problem caused by the strip on one side. The lifting plate insert 11 plays the role of supporting the strip 100 that slides off the rotating lifting plate 8 after the mold is closed, ensuring the stability of the product in the entire stamping process, thereby improving production efficiency and product quality.

[0026] As a preferred embodiment, the elastic reset component includes a reset pin 12 disposed in the front lifting frame 6 and a spring installed in conjunction with the reset pin 12. The elastic reset component, consisting of the reset pin 12 and the spring, provides reliable reset power to the rotating lifting plate 8, ensuring that the rotating lifting plate 8 accurately resets after each stamping cycle, guaranteeing the continuous and stable operation of the lifting device, further improving production efficiency. Furthermore, placing the reset pin 12 and the spring in the front lifting frame 6 ensures the stability of the reset function and improves reset reliability.

[0027] As a preferred embodiment, the end of the reset pin 12 that contacts the rotating lifting plate 8 is an arc surface. Designing the contact end of the reset pin 12 as an arc surface makes the contact between the reset pin 12 and the rotating lifting plate 8 smoother, reduces contact stress concentration, reduces wear, and extends the service life of the reset pin 12 and the rotating lifting plate 8. It also facilitates the smooth reset of the rotating lifting plate 8, further improving the stability and reliability of the lifting device.

[0028] As a preferred embodiment, the front lifting frame 6 is equipped with a limiting pressure block 13, which is located on the upper side of the rotating lifting plate 8. The elastic reset member drives the rotating lifting plate 8 to reset until it abuts against the limiting pressure block 13. By setting the limiting pressure block 13, the reset position of the rotating lifting plate 8 can be precisely limited, ensuring the consistency of the position of the rotating lifting plate 8 after each reset, further improving the stability and reliability of the lifting device, and ensuring the stable operation of the stamping process.

[0029] As a preferred embodiment, the end of the drive block 10 that contacts the rotating lifting plate 8 is provided with a guide slope. Providing a guide slope at the end of the drive block 10 that contacts the rotating lifting plate 8 allows the drive block 10 to contact the rotating lifting plate 8 more smoothly during the pressing process, guides the rotating lifting plate 8 to rotate smoothly, reduces the impact and wear between the two, and improves the service life and operational stability of the lifting device.

[0030] As a preferred embodiment, the top height of the rotating lifting plate 8 before it is subjected to pressure and rotates is flush with that of the rear lifting plate 4. Designing the top height of the rotating lifting plate 8 before it is subjected to pressure and rotates to be flush with that of the rear lifting plate 4 ensures that the material strip remains flat during the lifting process, avoiding material strip vibration or jamming caused by height difference, and further improving the conveying stability of the material strip and the stamping quality.

[0031] As a preferred embodiment, the front lifting frame 6 is provided with a mounting base 14. The rotating lifting plate 8 is mounted on the front lifting frame 6 via a rotating shaft 9 located in the mounting base 14. The mounting base 14 and the lifting plate insert 11 are detachably connected to the front lifting frame 6. This detachable connection method facilitates the installation, removal, and replacement of the rotating lifting plate 8 and the lifting plate insert 11, making it convenient for the maintenance and upkeep of the lifting device, improving production efficiency, reducing maintenance costs, or allowing for adaptability replacement according to the forming contour of the material strip 100, thereby improving the adaptability of the lifting device.

[0032] As a preferred embodiment, the upper die base 1 may be equipped with a stripper plate 15. The stripper plate 15 elastically rises and falls on the upper die base 1 via a stripper elastic element, and the drive block 10 is installed at the bottom of the stripper plate 15. By installing the drive block 10 at the bottom of the stripper plate 15, the elasticity of the stripper elastic element enables the drive block 10 to achieve stable rising and falling motion during the stamping process, thereby better driving the rotating lifting plate 8 to rotate, further improving the stability and reliability of the lifting device, and ensuring the smooth progress of the stamping process.

[0033] The working process of the lifting device for progressive die strip stamping in this scheme is as follows:

[0034] When the stamping die is open, the strip 100 is fed in, and the rotating lifting plate 8 supports the strip 100, suppressing vibration during the feeding process. As the upper die base 1 descends and drives the drive block 10 to contact the rotating lifting plate 8, the drive block 10 presses down on the rotating lifting plate 8, causing it to rotate. After rotating 35°, the strip 100 slides from the rotating lifting plate 8 onto the lifting plate insert 11, preventing interference with the product during the forming process. The upper die base 1 continues to move downwards in a straight line, and the upper stamping die 3 contacts the strip until the die is locked, completing the product forming. The upper die opens, and the drive block 10 rises with the upper die base 1, releasing the rotating lifting plate 8. The reset ejector pin 12 then pushes the rotating lifting plate 8 back, rotating 35° until it returns to a horizontal position. This provides support between the delivery of the strip 100 and the forming process, keeping the strip in a horizontal position, and solving the problems of lifting balance and feeding stability without increasing die costs.

[0035] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A lifting device for progressive die strip stamping, comprising an upper die base and a lower die base, wherein a rear lifting plate is provided on the lower die base, and the rear lifting plate elastically moves up and down on the lower die base by means of a first lifting elastic element, characterized in that, The lower die base is provided with a front lifting frame, which elastically moves up and down on the lower die base by means of a second lifting elastic element. The front lifting frame is hinged to a rotating lifting plate. The upper die base is provided with a driving block for pressing down and driving the rotating lifting plate to rotate. The lower die base is provided with an elastic reset element for driving the rotating lifting plate to rotate and reset. The front lifting frame is provided with a lifting plate insert, which corresponds to the lower side of the end of the rotating lifting plate after it has been pressed and rotated.

2. The lifting device for progressive die strip stamping according to claim 1, characterized in that, The elastic reset component includes a reset pin disposed in the front lifting frame and a spring installed in conjunction with the reset pin, the reset pin abutting against the bottom end of the rotating lifting plate.

3. The lifting device for progressive die strip stamping according to claim 2, characterized in that, The end of the reset pin that contacts the rotating lifting plate has a rounded surface.

4. The lifting device for progressive die strip stamping according to claim 2, characterized in that, The front lifting frame is equipped with a limiting pressure block, which is located on one side above the rotating lifting plate. The elastic reset member drives the rotating lifting plate to reset until it abuts against the limiting pressure block.

5. The lifting device for progressive die strip stamping according to claim 1, characterized in that, The end of the drive block that contacts the rotating lifting plate is provided with a guide slope.

6. The lifting device for progressive die strip stamping according to claim 1, characterized in that, The top height of the rotating lifting plate before it is pressed and rotated is flush with the rear lifting plate.

7. The lifting device for progressive die strip stamping according to claim 1, characterized in that, The front lifting frame is provided with a mounting base, and the rotating lifting plate is mounted on the front lifting frame by means of a rotating shaft in the mounting base. The mounting base and the lifting plate insert are detachably connected to the front lifting frame.

8. The lifting device for progressive die strip stamping according to claim 1, characterized in that, The upper mold base is provided with a stripper plate, which is elastically raised and lowered on the upper mold base by a stripper elastic element, and the drive block is installed at the bottom of the stripper plate.

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