Stamping equipment

Abstract

The utility model provides stamping equipment. The utility model provides stamping equipment. The stamping equipment comprises a stamping die and a punch. The punch is arranged above the stamping die and can vertically apply pressure; a through hole matched with the punch is formed in the stamping die; wherein the side face of the punch is a curved surface in fillet transition, and the inner surface of the through hole is a curved surface in fillet transition, so that burrs or defects are prevented from being generated on the edge in the punching process; the punch is used for punching a to-be-punched plate when the to-be-punched plate is placed on the punching die, so that the to-be-punched plate enters the through hole, and a punched part consistent with the through hole in shape is formed; the side face of the stamping part is provided with a curved surface in fillet transition consistent with the inner surface. According to the stamping equipment, the gaps between the side faces of the punches and the inner surfaces of the through holes are the same, the stamping force of the punches on the to-be-stamped plate is uniform, burrs or defects of stamped parts can be reduced, and the quality of the stamped parts is improved.

Description

Technical Field

[0001] This application relates to the field of stamping manufacturing technology, and more particularly to a stamping equipment. Background Technology

[0002] In the production of solder preforms and thermal interface material (TIM) preforms, obtaining suitable corner radii is crucial for achieving good fit, proper wetting, and mechanical strength in electronic applications. These sharp corners are typically created using electrical discharge machining (EDM) with extremely fine wires, resulting in radii typically between 0.02 mm and 0.1 mm, nearly a perfect 90-degree angle. This high-precision fine-wire EDM can be widely used in preform production.

[0003] However, high precision is costly for mass production, and when the punch and die have sharp 90-degree angles at corners, the gap between them at these corners is 1.41 times larger than at the edges. This larger gap causes uneven punching force on the sheet metal, resulting in preforms with more burrs and lower quality. Utility Model Content

[0004] In view of this, this application provides a stamping equipment to solve the problem of low quality of preforms produced by stamping when the corner area is a right angle.

[0005] Specifically, this application is implemented through the following technical solution:

[0006] The first aspect of this application provides a stamping device, which includes a stamping die and a punch; the punch is disposed above the stamping die and is capable of applying vertical pressure; the stamping die is provided with a through hole that matches the punch;

[0007] The punch has a rounded corner transition surface on its side, and the inner surface of the through hole also has a rounded corner transition surface to avoid burrs or defects at the edges during the stamping process. The punch is used to stamp the sheet material to be stamped when it is placed on the stamping die, so that the sheet material to be stamped enters the through hole and forms a stamped part with the same shape as the through hole. The side of the stamped part has a rounded corner transition surface that matches the inner surface.

[0008] Optionally, the diameter of each fillet on the rounded transition surface of the side of the punch is 0.2 mm to 0.5 mm.

[0009] Optionally, the diameter of each fillet on the rounded transition surface of the inner surface of the through hole is 0.2 mm to 0.5 mm.

[0010] Optionally, the through hole is a rectangular through hole or a through hole of other irregular shape.

[0011] Optionally, the diameter of the fillet on the rounded transition surface of the side of the punch is different from the diameter of the fillet on the rounded transition surface of the inner surface of the through hole.

[0012] Optionally, the diameter of each fillet on the rounded transition surface of the side of the punch is 0.3 mm; the diameter of each fillet on the rounded transition surface of the inner surface of the through hole is 0.5 mm.

[0013] Optionally, the stamping equipment is used to prepare interface heat dissipation material preforms and solder preforms.

[0014] Optionally, the punch and / or the stamping die are formed by CNC machining.

[0015] Optionally, the punch and / or the stamping die are formed by CNC machining and using a small end mill.

[0016] The stamping equipment provided in this application, by setting a rounded transition surface at the corner position of the punch side and the inner surface of the stamping die, can effectively avoid uneven stress on the stamped sheet during the stamping process, and prevent burrs or defects from being generated on the edge of the stamped part, thereby ensuring the quality and surface flatness of the stamped part. Furthermore, the rounded transition design of the corner also makes the shape of the side and inner surface of the stamped part consistent, which can avoid damage or deformation of the sheet to be stamped that may be caused by the sharp edge of the punch, and improve the accuracy of the stamped part. Thus, when using such stamping equipment to prepare stamped parts such as interface heat dissipation material preforms and solder preforms, the quality of the produced stamped parts can be effectively improved, and the accuracy and production efficiency can be increased. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the stamping equipment provided in this application;

[0018] Figure 2 for Figure 1 The diagram shows the stamping principle of the stamping equipment.

[0019] Figure 3 for Figure 1 Top view of the stamping equipment shown;

[0020] Figure 4 A top view of a stamped part shown in an exemplary embodiment of this application;

[0021] Figure 5 for Figure 1 A perspective view of the stamping equipment;

[0022] Figure 6 A top view of Embodiment 2 of the stamping equipment provided in this application;

[0023] Figure 7 A top view of Embodiment 3 of the stamping equipment provided in this application;

[0024] Figure 8 This is a schematic diagram illustrating the welding of a stamped part to a desired area, as shown in an exemplary embodiment of this application.

[0025] Figure 9 A graph showing the functional relationship between corner radius and gap percentage provided for an exemplary embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1: Stamping die;

[0028] 11: Through hole;

[0029] 2: Punch head;

[0030] 3: Sheet metal to be stamped;

[0031] 4: Stamped parts;

[0032] 5: Substrate;

[0033] 6: Desired welding area. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0035] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used herein are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0036] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0037] In industrial production environments, stamping equipment is widely used in industries such as metal processing, electronic component production, and automotive parts manufacturing. However, during the stamping process using a punch, problems such as burrs appearing on the edges of the stamped parts can occur. For some precision parts that require high precision, the stamped parts often fail to meet the product's precision requirements.

[0038] In traditional stamping equipment, the punch and stamping die are designed with right angle corners. The stamping die and punch, designed in this way, can meet certain processing requirements, so that the stamped parts produced can have good fit in actual application. To meet the precision requirements of high-precision parts, electrical discharge machining (EDM) is typically used to process right-angle corners. By using extremely fine wires for EDM, corner areas can be machined to achieve a corner radius typically between 0.02 mm and 0.1 mm, approaching a perfect 90-degree angle. This effectively meets the precision requirements of precision parts. However, for mass production, EDM is very expensive. Furthermore, because the punches and dies designed for right-angle corners have sharp 90-degree angles, the clearance between them at these corners is approximately 1.41 times larger than at smoother edges. This larger clearance leads to uneven cutting of the sheet metal during stamping, resulting in more burrs on the stamped parts, affecting their appearance and quality (especially at corners where burrs are more abundant). Therefore, in order to improve the quality and precision of stamped parts, the corner radius of the corner area can be appropriately increased to reduce the difference between the gap between the punch and the stamping die in the corner area and the gap in the smooth area, while ensuring that the gap between the punch and the stamping die is small.

[0039] This application provides a stamping device in which the gap between the corner area and the smooth area is consistent, thereby making the punching of the sheet metal uniform, reducing burr problems and improving the stamping quality of the stamped parts.

[0040] The following specific embodiments are given to illustrate the technical solution of this application in detail.

[0041] Figure 1 This is a schematic diagram of an embodiment of the stamping equipment provided in this application. Figure 2 for Figure 1 The diagram shows the stamping principle of the stamping equipment. Figure 3 for Figure 1 Top view of the stamping equipment shown. Figure 4 This is a top view illustrating a stamped part according to an exemplary embodiment of this application. Please also refer to... Figures 1 to 4The stamping equipment provided in this embodiment may include a stamping die 1 and a punch 2; the punch 2 is disposed above the stamping die 1 and is capable of applying vertical pressure; the stamping die 1 is provided with a through hole 11 that matches the punch 2;

[0042] The punch 2 has a rounded corner transition surface on its side, and the inner surface of the through hole 11 has a rounded corner transition surface to avoid burrs or defects at the edges during the stamping process. The punch 2 is used to stamp the plate to be stamped 3 when it is placed on the stamping die 1, so that the plate to be stamped 3 enters the through hole 11 to form a stamped part 4 with the same shape as the through hole 11. The side of the stamped part 4 has a rounded corner transition surface that is consistent with the inner surface.

[0043] Specifically, the stamping equipment includes a stamping die 1 and a punch 2. The punch 2 is positioned above the stamping die 1. During the stamping process, the sheet metal 3 to be stamped is placed above the stamping die 1. The punch 2, positioned above the stamping die 1, applies stamping force to the sheet metal 3, causing it to enter the through hole 11 in the middle of the stamping die 1, forming a stamped part 4 with a shape consistent with the through hole 11. It can be understood that the side of the punch 2 should have a shape consistent with the inner surface of the through hole 11, so that the side of the resulting stamped part 4 also has a shape consistent with the inner surface of the through hole 11. At the same time, there is a certain gap between the side of the punch 2 and the inner surface of the through hole 11, allowing the punch 2 to smoothly stamp the sheet metal 3 and press the resulting stamped part 4 into the through hole 11.

[0044] Referring to the previous description, in traditional stamping equipment, electrical discharge machining is commonly used to finely process the corner area of ​​punch 2 and through hole 11, resulting in a very small corner radius (between 0.02 mm and 0.1 mm). The angle of the corner area is close to a perfect 90 degrees. As a result, during the stamping process, due to the large gap between punch 2 and through hole 11 in the corner area, burrs are easily formed in the corner area.

[0045] Specifically, it can be understood that if the gap between the punch 2 and the through hole 11 is G in the smooth area and 1.41G in the corner area, then when the punch 2 punches the sheet metal 3 to be stamped, the stamping pressure on the sheet metal 3 to be stamped is uneven in the smooth area and the corner area, which makes the formed stamped part 4 prone to producing more burrs, and the quality of the stamped part 4 is low.

[0046] Figure 5 for Figure 1 Please also refer to the perspective view of the stamping equipment. Figure 3 and Figure 5In order to avoid uneven stamping pressure on the sheet metal to be stamped due to uneven gap between the punch and the inner surface of the through hole, thus producing low-quality stamped parts, the stamping equipment provided in this embodiment makes the side of the punch 2 a rounded curved surface and the inner surface of the through hole 11 a rounded curved surface.

[0047] See Figure 3 That is, the corner area corresponding to the side of the punch 2 and the inner surface of the through hole 11 is a curved corner area. In the curved corner area, both the side of the punch 2 and the inner surface of the through hole 11 are rounded curved surfaces. At this time, the gap distance between the side of the punch 2 and the inner surface of the through hole 11 in the smooth area is G, and the gap distance between them in the curved corner area is also G. In this way, the gap distance between the side of the punch 2 and the inner surface of the through hole 11 in both the smooth area and the curved corner area is equal, so that the plate 3 to be stamped can be uniformly stressed during the stamping process, which not only meets the required accuracy, but also effectively reduces burrs or defects on the product edges, greatly improving the quality of the stamped parts 4 produced.

[0048] Please refer to Figure 3 , Figure 4 and Figure 5 Since the side of the punch 2 is a rounded curved surface and the inner surface of the through hole 11 is a rounded curved surface, the side of the stamped part 4 formed by the stamping equipment provided in this embodiment has a rounded curved surface consistent with the inner surface.

[0049] It should be noted that the specific shape of the through hole 11 is set according to the specific shape of the stamped part 4 to be formed. In this embodiment, the specific shape of the through hole 11 is not limited.

[0050] Optionally, in one possible implementation, the through hole 11 is a rectangular through hole or a through hole of other irregular shape.

[0051] Figure 6 This is a top view of Embodiment 2 of the stamping equipment provided in this application. Figure 7 This is a top view of Embodiment 3 of the stamping equipment provided in this application. Please also refer to... Figure 6 and Figure 7 Specifically, in Figure 5 In the example shown, the through hole 11 of the stamping equipment is I-shaped, and correspondingly, the punch 2 is also I-shaped. Thus, using this stamping equipment, I-shaped stamped parts 4 can be produced. Further details can be found in [reference needed]. Figure 6 , Figure 6 In the stamping equipment shown, the distance between the side of the punch 2 and the inner surface of the through hole 11 is equal in the smooth area and the curved corner area, resulting in fewer burrs or defects in the produced products, and high-quality "I" shaped stamped parts 4 can be produced.

[0052] Similarly, in Figure 7 In the example shown, the through hole 11 is cross-shaped, and correspondingly, the punch 2 is also cross-shaped. Thus, using this stamping equipment, the required cross-shaped stamped part 4 can be produced. Furthermore, please refer to... Figure 7 , Figure 7 In the stamping equipment shown, the distance between the side of the punch 2 and the inner surface of the through hole 11 is equal in the smooth area and the curved corner area, resulting in fewer burrs or defects in the produced products, and high-quality "+" shaped stamped parts 4 can be produced.

[0053] It should be noted that the stamping equipment provided in this application can be used to prepare interface heat dissipation material preforms and solder preforms. It is understood that, in specific preparation, through holes 11 and punches 2 of different shapes can be set according to the required shapes of interface heat dissipation material preforms and solder preforms to produce interface heat dissipation material preforms and solder preforms of the required shapes.

[0054] Furthermore, in the stamping equipment provided in this application, the diameter of each fillet on the rounded transition surface of the punch side is 0.2 mm to 0.5 mm, and the diameter of each fillet on the rounded transition surface of the inner surface of the through hole 11 is also 0.2 mm to 0.5 mm.

[0055] It is understood that, in order to satisfy the feasibility of the stamping equipment provided in this application, the diameter of the fillet on the rounded transition surface of the side of the punch 2 is different from the diameter of the fillet on the rounded transition surface of the inner surface of the through hole 11. For example, in one possible implementation, the diameter of each fillet on the rounded transition surface of the side of the punch 2 is 0.3 mm, and the diameter of each fillet on the rounded transition surface of the inner surface of the through hole 11 is 0.5 mm.

[0056] Optionally, the punch 2 and / or stamping die 1 in the stamping equipment provided in this application are formed by CNC machining. Furthermore, when forming the punch 2 and / or stamping die 1 by CNC machining, a small end mill can also be used.

[0057] It should be noted that electrical discharge machining (EDM) is often used in the manufacturing and processing of traditional stamping equipment. However, the precision of EDM is too high, far exceeding the manufacturing precision of the stamping equipment in this embodiment. At the same time, EDM is also expensive. Due to the advancement of CNC machining technology, the use of small end mills can complete the manufacturing of stamping equipment while meeting the manufacturing precision requirements. Moreover, the use of CNC machining technology can significantly reduce the overall cost.

[0058] The stamping equipment provided in this embodiment, by setting a rounded transition surface at the corner position of the punch side and the inner surface of the stamping die, can effectively avoid uneven stress on the sheet metal to be stamped during the stamping process, and prevent burrs or defects from being generated on the edge of the stamped part, thereby ensuring the quality and surface flatness of the stamped part. Furthermore, the transition design of the corner as a curved surface also makes the shape of the side and inner surface of the stamped part consistent, which can avoid damage or deformation of the sheet metal to be stamped that may be caused by the sharp edge of the punch, and improve the accuracy of the stamped part. Therefore, using such equipment to prepare stamped parts such as interface heat dissipation material preforms and solder preforms can effectively improve the quality of the produced stamped parts and increase production efficiency.

[0059] It should be noted that when welding the stamped part 4 to the designated area, the desired welding area is often a regular rectangle. See [link / reference] Figure 4 As described above, the corner of the stamped part 4 obtained by the stamping equipment provided in this application is a rounded curved surface. Therefore, when the stamped part 4 is welded to the desired area on the substrate 5, there may be a gap in the middle of the welding area, which will affect the heat conduction of the welding area.

[0060] The following explains the impact of the stamped parts produced by the stamping equipment provided in this application on the thermal conductivity:

[0061] Figure 8 This is a schematic diagram illustrating the welding of a stamped part to a desired area, as shown in an exemplary embodiment of this application. Please refer to... Figure 8 , Figure 8 Figure (A) shows the desired welding area 6 on substrate 5. This desired welding area 6 is a regular square located in the center of substrate 5. Furthermore, Figure 8 Figure (B) illustrates the implementation principle when a stamped part 4 is welded to the desired welding area 6, in which there is no gap in the middle area of ​​the welding area; furthermore, Figure 8 The diagram in Figure (C) shows the implementation principle when two stamped parts 4 are welded to the desired welding area 6. At this time, there is no gap in the middle area of ​​the welding area. Figure 8 Figure (D) shows the implementation principle when four stamped parts 4 are welded to the desired welding area 6, at which time a gap is formed in the middle of the desired welding area 6.

[0062] Specifically, when one or two stamped parts 4 are welded to the desired welding area 6, no gap is formed in the middle of the desired welding area 6, and the heat conduction performance of the welding area is not affected. Furthermore, when four stamped parts 4 are welded to the desired welding area 6, a gap is formed in the middle of the desired welding area 6. The degree of influence of this gap on the heat conduction performance of the desired welding area 6 will be explained below.

[0063] Please continue to refer to Figure 8 In Figure (D), when four rectangular stamped parts 4 are welded to the desired welding area 6, a gap is created in the middle of the desired welding area 6. Assuming the radius of curvature of the corner of the four matrix stamped parts 4 is r, and the desired welding area 6 is a 20mm*20mm square, each rectangular stamped part 4 forms a quarter-circular gap with radius r in the middle of the desired welding area 6. The area of ​​the quarter-circular gap is (1 / 4)πr. 2 Therefore, for the four rectangular stamped parts 4, they can be equivalently regarded as forming a complete circular gap with radius r, and the total area of ​​the gap is 4×(1 / 4)πr. 2 =πr 2 Furthermore, the ratio of the total area of ​​the voids to the total area of ​​the desired welding area 6 is calculated, and this ratio is determined as the void percentage. Based on the obtained void percentage, the impact of the voids on the heat conduction performance of the desired welding area 6 is determined.

[0064] For example, when the radius of curvature r at the corner of stamping part 4 is 0.15 mm, the ratio is [π(0.15)2 / 400)]×100%=0.0177%; when the radius of curvature r at the corner of stamping part 4 is 0.5 mm, the ratio is [π(0.5)2 / 400)]×100%=0.1964%.

[0065] Figure 9 Please refer to the graph showing the functional relationship between corner radius and gap percentage provided for an exemplary embodiment of this application. Figure 9 Referring to the preceding description, in this application, a small end mill in CNC machining is used to prepare the punch and stamping die. The radius of curvature of the corner of the stamping part 4, which has a rounded corner transition, is 0.2 mm to 0.5 mm. By calculating the percentage of voids, it can be seen that when the four rectangular stamping parts 4 are welded to the desired welding area 6, the voids formed by the rounded corners account for less than 0.2% of the voids in the desired welding area 6. This has little impact on the thermal conductivity of the desired welding area 6 and can meet the requirements under actual conditions.

[0066] It should be noted that the void percentage can reflect the degree of influence of the void formed by different corner radii on the thermal conductivity of the desired welding area. The appropriate corner radius can be selected according to actual needs. In this application, it is not limited.

[0067] It should be noted that, based on the above calculations, it can be determined that when the corner is a curved surface, the gap has a small impact on the thermal conductivity of the desired welding area and can be ignored. In this way, the corner radius can be set according to actual needs, which can improve the quality of the stamped parts while meeting the performance indicators of the desired welding area 6.

[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A stamping device, characterized in that, The stamping equipment includes a stamping die and a punch; the punch is positioned above the stamping die and is capable of applying vertical pressure; the stamping die is provided with a through hole that matches the punch; The punch has a rounded corner transition surface on its side, and the inner surface of the through hole also has a rounded corner transition surface to avoid burrs or defects at the edges during the stamping process. The punch is used to stamp the sheet material to be stamped when it is placed on the stamping die, so that the sheet material to be stamped enters the through hole and forms a stamped part with the same shape as the through hole. The side of the stamped part has a rounded corner transition surface that matches the inner surface.

2. The stamping equipment according to claim 1, characterized in that, The diameter of each rounded corner on the curved surface of the punch side is 0.2 mm to 0.5 mm.

3. The stamping equipment according to claim 1, characterized in that, The diameter of each fillet on the rounded transition surface of the inner surface of the through hole is 0.2 mm to 0.5 mm.

4. The stamping equipment according to claim 1, characterized in that, The through hole is a rectangular through hole or a through hole of other irregular shape.

5. The stamping equipment according to claim 1, characterized in that, The diameter of the fillet on the rounded transition surface of the side of the punch is different from the diameter of the fillet on the rounded transition surface of the inner surface of the through hole.

6. The stamping equipment according to claim 1, characterized in that, The diameter of each fillet on the rounded transition surface of the side of the punch is 0.3 mm; the diameter of each fillet on the rounded transition surface of the inner surface of the through hole is 0.5 mm.

7. The stamping equipment according to claim 1, characterized in that, The stamping equipment is used to prepare interface heat dissipation material preforms and solder preforms.

8. The stamping equipment according to claim 1, characterized in that, The punch and / or the stamping die are manufactured by CNC machining.

9. The stamping equipment according to claim 8, characterized in that, The punch and / or the stamping die are formed by CNC machining and using a small end mill.

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