Stamping die

Abstract

The utility model discloses a stamping die which comprises a lower die structure and an upper die structure, the upper die structure comprises a stamping mechanism used for being matched with the lower die structure to stamp a stamping part, and the lower die structure comprises a female die used for being matched with the stamping mechanism to stamp. A material pressing plate used for pressing a stamping part during stamping is arranged between the upper die structure and the lower die structure, and the material pressing plate is provided with a strong pressing structure used for increasing the strong pressing amount of a local area and preventing a middle column from being broken during stamping forming of the stamping part. According to the die, on the premise that the base punching depth is guaranteed to be three times, the strong pressing amount of a local area can be increased through the strong pressing structure, the pressing force on a stamping part can be enhanced when the stamping part is stamped, and the situation that a middle column of the stamping part is pulled and fractured is prevented.

Description

[Technical field]

[0001] The utility model relates to the technical field of stamping, in particular to a stamping die. [Background technology]

[0002] Lead frame is a chip carrier in integrated circuits, generally made of metal sheets. It is a key structural component that uses composite materials to achieve electrical connection between the internal circuit lead-out terminal of the chip and the external lead to form an electrical circuit. It serves as a bridge to connect with external wires. Lead frames are required in most semiconductor integrated blocks and are an important basic material in the electronic information industry. During the production and processing process, they are generally made by stamping, and stamping molds are required in this process.

[0003] When the current stamping die produces lead frames, the seating depth needs to be greater than 3 times the material thickness. The seating depth is easy to break the middle column of the lead frame during the seating stretching, causing the middle column to break, which cannot meet the process requirements. A stamping die is needed that meets the seating depth requirements while avoiding the risk of middle column breakage. [Contents of the utility model]

[0004] In order to solve the technical problem of meeting the seating depth requirement while avoiding the risk of center column fracture, the utility model proposes a stamping die.

[0005] The utility model is realized by the following technical solutions:

[0006] A stamping die includes a lower die structure and an upper die structure, wherein the upper die structure includes a stamping mechanism for cooperating with the lower die structure to press a stamped part, and the lower die structure includes a concave die for cooperating with the stamping mechanism to stamp. A pressing plate for pressing the stamped part during stamping is provided between the upper die structure and the lower die structure, and the pressing plate is provided with a strong pressure structure for increasing the strong pressure in a local area to prevent the middle column from breaking during stamping of the stamped part. Under the premise of ensuring that the seat depth is 3 times, the strong pressure structure of the die can increase the strong pressure in the local area, and can enhance the pressing force on the stamped part when the stamped part is stamped, so as to prevent the middle column of the stamped part from being pulled and broken.

[0007] In the stamping die as described above, the strong pressing structure includes a strong pressing strip for increasing the strong pressing amount at the pressing end of the pressing plate, and the strong pressing strip is integrally formed with the pressing end of the pressing plate.

[0008] In the stamping die as described above, the thickness of the strong pressure strip is 0.01MM-0.03MM.

[0009] In the stamping die as described above, the thickness of the strong pressure strip is 0.02MM.

[0010] In the stamping die as described above, the length of the strong pressure strip is 0.3MM-0.5MM.

[0011] In the stamping die as described above, one side of the strong pressure strip is flush with the inner side surface of the die.

[0012] In the stamping die as described above, the depth of the die is 4 times that of the material of the stamping part.

[0013] In the stamping die as described above, the pressing plates are arranged on both sides close to the top of the die.

[0014] In the stamping die as described above, the pressing plate is made of a material with high strength and high hardness.

[0015] In the stamping die as described above, the stamping mechanism adopts a seating punch with sufficient strength and hardness.

[0016] Compared with the prior art, the punching die proposed by the utility model has the following beneficial effects:

[0017] 1. The stamping die proposed in the utility model includes an upper die structure and a lower die structure, between which a pressing plate for pressing the stamped part during stamping is provided, and the pressing plate is provided with a strong pressure structure for increasing the strong pressure in the local area. Under the premise of ensuring that the seat depth is 3 times, the strong pressure structure can increase the strong pressure in the local area, and can enhance the pressing force on the stamped part when the stamped part is stamped, so as to prevent the middle column of the stamped part from being pulled and broken.

[0018] 2. The strong pressing structure of the stamping die includes a strong pressing strip for increasing the strong pressing amount at the pressing end of the pressing plate, and the strong pressing strip is integrally formed with the pressing end of the pressing plate. The design of the strong pressing strip being integrally formed with the pressing end of the pressing plate can prevent the strong pressing strip from easily falling off during stamping, thereby damaging the stamping die.

[0019] 3. The thickness of the strong pressure strip described in the stamping die is 0.01MM-0.03MM, and the preferred thickness is 0.02MM. When the thickness of the strong pressure strip is less than 0.01MM, the increased pressure of the strong pressure strip is too low, and it cannot effectively reduce the gap between the mold part surfaces, and cannot prevent the column of the pressure piece from being pulled and broken. When the strong pressure strip exceeds 0.03MM, the increased pressure of the strong pressure strip is too high, which is easy to cause cracks or breakage in the mold, and at the same time cause deviation in the size of the pressure piece, reducing the overall quality of the product.

Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 2 It is a side view structural diagram of the lower mold of the utility model;

[0023] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0024] Figure 4 It is an enlarged schematic diagram of the lower mold structure A area of ​​the utility model;

[0025] Figure 5 It is an enlarged schematic diagram of the top view of the structure B area of ​​the utility model. [Specific implementation method]

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Specific embodiments, such as Figures 1 to 5 A stamping die is shown, comprising a lower die structure 10 and an upper die structure 40, wherein the upper die structure 40 comprises a stamping mechanism 41 for cooperating with the lower die structure 10 to press a stamping part 50, and the lower die structure 10 comprises a concave die 13 for cooperating with the stamping mechanism 41 for stamping, and a pressing plate 20 for pressing the stamping part 50 during stamping is provided between the upper die structure 40 and the lower die structure 10, and the pressing plate 20 is provided with a strong pressure structure 30 for increasing the strong pressure in the local area to prevent the middle column from breaking during the stamping of the stamping part 50. Under the premise of ensuring that the seating depth is 3 times, the strong pressure structure 30 of the die can increase the strong pressure in the local area, and can enhance the pressing force on the stamping part 50 when the stamping part 50 is stamped, so as to prevent the middle column of the stamping part 50 from being pulled and broken.

[0028] Furthermore, as a preferred implementation mode of the present invention but not limitation, the stamping mechanism 41 cooperates with the die 13 of the lower die structure 10 to perform stamping processing on the stamping part 50, and the stamping mechanism 41 adopts a punch such as a seat punch with sufficient strength and hardness.

[0029] In this embodiment, the stamping mechanism uses a punch such as a seat punch with sufficient strength and hardness to prevent breakage or damage during the stamping process. The stamping mechanism and the die can be used together to meet the process requirements of making stamped parts into different shapes, while ensuring the shape accuracy and dimensional accuracy of the stamped parts. The die requires regular maintenance and care to extend the service life of the die and improve the quality of the stamped parts.

[0030] Furthermore, as a preferred implementation mode of the present invention but not a limitation, the depth of the die 13 is 4 times the material of the stamping part 50, and a pressing plate 20 is provided on each of the left and right sides of the top of the die 13 for pressing the stamping part 50 during punching. The pressing plate 20 is made of a material with high strength and high hardness, such as high-precision steel.

[0031] In this embodiment, the pressure plate can prevent the stamped parts from moving and bouncing during the stamping process, thereby ensuring the shape and dimensional accuracy of the stamped parts. The pressure plate is made of high-precision steel and other materials with high strength and high hardness, which can ensure that the pressure plate has high hardness and wear resistance, thereby improving the service life of the stamping die and the quality of the required stamped parts.

[0032] Furthermore, as a preferred implementation mode of the present invention but not a limitation, the strong pressure structure 30 includes a strong pressure strip 31 for increasing the strong pressure at the pressing end of the pressing plate 20, and the strong pressure strip 31 is connected to the pressing end of the pressing plate 20, and the thickness of the strong pressure strip 31 is 0.01MM-0.03MM, and the preferred thickness of the strong pressure strip 31 is 0.02MM, and the length of the strong pressure strip 31 is 0.3MM-0.5MM, and a plurality of the strong pressure strips 31 are arranged in the lower mold structure 10.

[0033] In this embodiment, the strong pressure structure includes a strong pressure strip for increasing the strong pressure at the pressing end of the pressure plate. The strong pressure strip can reduce the gap between the mold part surfaces by increasing the strong pressure in the local area, effectively preventing the middle column of the stamped part from breaking when it is stamped. The thickness of the strong pressure strip is between 0.01MM-0.03MM. When the thickness of the strong pressure strip is less than 0.01MM, the strong pressure added by the strong pressure strip is too low, and the gap between the mold part surfaces cannot be effectively reduced, and the effect of preventing the middle column of the pressed part from breaking cannot be achieved. When the strong pressure strip exceeds 0.03MM, the strong pressure added by the strong pressure strip is too high, which can easily cause cracks or breakage in the mold, and at the same time cause dimensional deviation of the pressed part, reducing the overall quality of the product.

[0034] The working principle of this embodiment is as follows:

[0035] A stamping die proposed in the utility model includes an upper die structure 40 and a lower die structure 10, wherein a pressing plate 20 for pressing a stamping part 50 during stamping is arranged between the upper die structure 40 and the lower die structure 10, a strong pressing structure 30 is connected to the pressing end of the pressing plate 20, and the strong pressing structure 30 includes a strong pressing strip 31 for increasing the strong pressure at the pressing end of the pressing plate 20, the strong pressing strip 31 can increase the strong pressure amount in the local area, and can enhance the clamping force on the stamping part 50 when the stamping part 50 is stamped, so as to prevent the center column of the stamping part 50 from being pulled and broken.

[0036] Ordinary technicians in the relevant field should understand that the above is an implementation method provided in combination with specific content, and it is not considered that the specific implementation of the utility model is limited to these descriptions. At the same time, due to different industry names, it is not limited to the above names, nor is it limited to English names. Any method, structure, etc. that is similar or identical to the method, structure, etc. of the utility model, or a number of technical deductions or replacements made based on the concept of the utility model, should be regarded as the protection scope of the utility model.

Claims

1. A stamping die, characterized in that: The invention comprises a lower die structure (10) and an upper die structure (40), wherein the upper die structure (40) comprises a punching mechanism (41) for cooperating with the lower die structure (10) to punch a stamping part (50), and the lower die structure (10) comprises a concave die (13) for cooperating with the punching mechanism (41) to punch, and a pressing plate (20) for pressing the stamping part (50) during punching is provided between the upper die structure (40) and the lower die structure (10), and the pressing plate (20) is provided with a strong pressing structure (30) for increasing the strong pressing amount in a local area to clamp the stamping part (50) and prevent the center column from being pulled and broken during the punching of the stamping part (50).

2. A stamping die according to claim 1, characterized in that: The strong pressing structure (30) comprises a strong pressing strip (31) for increasing the strong pressing amount at the pressing end of the pressing plate (20), and the strong pressing strip (31) is integrally formed with the pressing end of the pressing plate (20).

3. A stamping die according to claim 2, characterized in that: The thickness of the strong pressure strip (31) is 0.01MM-0.03MM.

4. A stamping die according to claim 3, characterized in that: The thickness of the strong pressure strip (31) is 0.02MM.

5. A stamping die according to claim 2, characterized in that: The length of the strong pressure strip (31) is 0.3MM-0.5MM.

6. A stamping die according to claim 2, characterized in that: One side of the strong pressure strip (31) is flush with the inner side surface of the concave mold (13).

7. A stamping die according to claim 1, characterized in that: The depth of the concave die (13) is four times the material of the stamping part (50).

8. A stamping die according to claim 1, characterized in that: The pressing plates (20) are arranged on both sides close to the top of the concave die (13).

9. A stamping die according to claim 1, characterized in that: The pressing plate (20) is made of a material with high strength and high hardness.

10. A stamping die according to claim 1, characterized in that: The punching mechanism (41) adopts a punch with sufficient strength and hardness.

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