Composite stamping die for cooling fins

Abstract

A composite stamping die for radiating fins relates to the technical field of composite dies and comprises an upper die component and a lower die component, the upper die component comprises a male die and a punch, and the lower die component comprises a female die and a punch-cum-blanking die. In the downward pressing process of the die, punching is completed through shearing force between the punch and the concave-convex die, edge cutting is completed through shearing force between the convex die and the concave die, and edge turning is completed under extrusion of the concave-convex die and the convex die. The composite stamping die is novel in structure and capable of completing trepanning, edge cutting and flanging operation through one-time stamping, so that the machining efficiency is improved, and the composite stamping die has good practical value.

Description

Technical Field

[0001] This utility model relates to the field of composite mold technology, and more specifically, to a composite stamping mold for heat sinks. Background Technology

[0002] Heat sinks are common components in cooling systems, serving to increase heat transfer area and accelerate heat exchange. In automotive turbocharger systems, a disc-shaped heat sink is used in the cooler, such as... Figure 1 As shown, the heat sink has a central opening for mounting on the bearing, and the flanged structure of the central opening increases the heat transfer contact area. In existing manufacturing methods, the opening and trimming are typically performed first, followed by the flanged process, which is quite cumbersome. Utility Model Content

[0003] The purpose of this utility model is to provide a composite stamping die for heat sinks. It has a novel structure and can complete the opening, trimming, and flanging operations in one stamping, thereby improving processing efficiency.

[0004] The embodiments of this utility model are implemented as follows:

[0005] A composite stamping die for a heat sink includes an upper die assembly and a lower die assembly. The upper die assembly includes a punch and a punch head. The punch has a through-hole along its axial direction, and the punch head is embedded in the first mounting hole and fits tightly with the first mounting hole. The bottom surface of the punch has an annular stamping ridge, which is set along the edge of the punch and forms a first gap with the punch head. The lower edge of the punch head is lower than the lower edge of the stamping ridge. The lower die assembly includes a die and a punch and a die. The die has a through-hole along its axial direction, and the punch and the die head are set in the second mounting hole. The top of the punch and the die head are flush with the top of the die. A second gap is formed between the outer wall of the punch and the inner wall of the die. The punch and the die head have a through-hole along their axial direction. When the upper die assembly and the lower die assembly are closed, the punch and the die head are inserted into the first gap, the stamping ridge is inserted into the second gap, the punch head is inserted into the third mounting hole, and a fourth gap is formed between the inner wall of the stamping ridge and the outer wall of the punch and the die head.

[0006] Furthermore, in other preferred embodiments of this utility model, the diameter of the punch is equivalent to the inner diameter of the third mounting hole, and the outer diameter of the stamping protrusion is equivalent to the inner diameter of the second mounting hole.

[0007] Furthermore, in other preferred embodiments of this utility model, the inner edge of the bottom of the stamping protrusion and the outer edge of the top of the die are both provided with rounded chamfers.

[0008] Furthermore, in other preferred embodiments of this utility model, the upper mold assembly further includes an upper template, a mold shank, and an upper fixing plate. The upper template and the mold shank are coaxially arranged, and the upper fixing plate is disposed at the bottom of the upper template. The punch is disposed at the bottom of the mold shank and penetrates through the upper fixing plate. A disc-shaped first limiting block is provided at the top of the punch, and a first limiting groove matching the first limiting block is provided at the top of the upper fixing plate. The upper fixing plate is connected to the upper template by a threaded component and presses down the first limiting block.

[0009] Furthermore, in other preferred embodiments of this utility model, the punch and the upper fixing plate are connected by threaded parts.

[0010] Furthermore, in other preferred embodiments of this utility model, a discharge rubber ring is provided at the bottom of the upper fixing plate, and the discharge rubber ring surrounds the punch; an annular discharge plate is provided at the bottom of the discharge rubber ring.

[0011] Furthermore, in other preferred embodiments of this utility model, the lower mold assembly includes a lower template and a lower fixing plate, with the lower fixing plate disposed on the top of the lower template; the bottom of the punch and die is provided with an annular second limiting block, and the bottom of the lower fixing plate is provided with a second limiting groove that matches the second limiting block; the lower fixing plate is connected to the lower template by a threaded component and presses down the second limiting block.

[0012] Furthermore, in other preferred embodiments of this utility model, the die cavity and the lower fixed plate are connected by a threaded component.

[0013] Furthermore, in other preferred embodiments of this utility model, an annular top plate is provided in the second gap, and a top pin is provided at the bottom of the top plate. The top pin passes through the lower fixing plate and the lower template and is connected to the hydraulic drive device.

[0014] Furthermore, in other preferred embodiments of this utility model, the lower template has guide posts arranged in the vertical direction, and the upper template is provided with guide sleeves that slide in cooperation with the guide posts.

[0015] The beneficial effects of this utility model embodiment are:

[0016] This utility model provides a composite stamping die for heat sinks, comprising an upper die assembly and a lower die assembly. The upper die assembly includes a punch and a punch head, while the lower die assembly includes a die and a punch-die assembly. During the die pressing process, punching is completed by the shearing force between the punch head and the punch-die assembly, trimming is completed by the shearing force between the punch and the die, and flanging is completed by the extrusion of the punch-die assembly and the punch head. This composite stamping die has a novel structure and can complete the punching, trimming, and flanging operations in one stamping operation, thereby improving processing efficiency and having good practical value. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A cross-sectional view of the heat sink provided in an embodiment of this utility model;

[0019] Figure 2 A cross-sectional view of a composite stamping die for a heat sink provided in an embodiment of this utility model;

[0020] Figure 3 A cross-sectional view of the upper die assembly of a composite stamping die for a heat sink provided in an embodiment of this utility model;

[0021] Figure 4 This is a cross-sectional view of the lower die assembly of a composite stamping die for a heat sink, provided in an embodiment of the present invention.

[0022] Icons: 100-Composite stamping die; 110-Upper die assembly; 111-Punch; 1111-First limit block; 112-Punch; 1121-Stamping punch; 1122-First clearance; 113-Upper template; 114-Die shank; 115-Upper fixing plate; 116-Ejector rubber ring; 117-Ejector plate; 118-Guide sleeve; 120-Lower die assembly; 121-Die; 1211-Second mounting hole; 122-Punch and die; 1221-Third mounting hole; 1222-Second limit block; 123-Lower template; 124-Lower fixing plate; 125-Ejector plate; 1251-Ejector pin; 126-Guide post; 130-Positioning pin; 200-Heat sink. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, 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", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0025] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the 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" the 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. Example

[0028] This embodiment provides a composite stamping die 100 for a heat sink 200, referring to... Figure 1 As shown, it includes an upper mold assembly 110 and a lower mold assembly 120.

[0029] Among them, such as Figure 2 and Figure 3 As shown, the upper die assembly 110 includes a punch 112 and a punch 111. The punch 112 has a through first mounting hole (not shown) along its axial direction. The punch 111 is embedded in the first mounting hole and fits tightly with the first mounting hole. The bottom surface of the punch 112 has an annular stamping ridge 1121. The stamping ridge 1121 is arranged along the edge of the punch 112 and forms a first gap 1122 between it and the punch 111. The lower edge of the punch 111 is lower than the stamping ridge 1121. The lower edge of the ridge 1121; the lower mold assembly 120 includes a die 121 and a punch 122. The die 121 has a through second mounting hole 1211 along its axial direction. The punch 122 is disposed in the second mounting hole 1211. The top of the punch 122 is flush with the top of the die 121. A second gap (not shown) is formed between the outer wall of the punch 122 and the inner wall of the die 121. The punch 122 has a through third mounting hole 1221 along its axial direction.

[0030] like Figure 1 As shown, when the upper die assembly 110 and the lower die assembly 120 are closed, the punch 111 first contacts the metal sheet. As the punch 111 continues to descend and insert into the third mounting hole 1221, the shearing force between the punch 111 and the inner wall of the die 122 can complete the punching at the center of the metal sheet. Subsequently, as the upper die assembly 110 continues to press down, the die 122 is inserted into the first gap 1122. Under the pressure of the outer wall of the die 122 and the inner wall of the punch 112, the center hole of the metal sheet is turned upward, and a fourth gap is formed between the inner wall of the punching ridge 1121 and the outer wall of the die 122 to accommodate the turned-up portion. At the same time, the punching ridge 1121 is inserted into the second gap, and the metal sheet is cut by the shearing force between the outer wall of the punching ridge 1121 and the inner wall of the die 121.

[0031] Furthermore, the diameter of the punch 111 is approximately equal to the inner diameter of the third mounting hole 1221, and the outer diameter of the stamping protrusion 1121 is approximately equal to the inner diameter of the second mounting hole 1211. This precise dimensional matching ensures the machining accuracy of punching and trimming. Both the inner edge of the bottom of the stamping protrusion 1121 and the outer edge of the top of the die 122 are provided with rounded chamfers. This ensures that the machined parts form a chamfered transition at the flanged position, preventing stress cracking.

[0032] like Figure 2 As shown, the upper mold assembly 110 also includes an upper template 113, a mold shank 114, and an upper fixing plate 115. The upper template 113 and the mold shank 114 are coaxially arranged, and the upper fixing plate 115 is located at the bottom of the upper template 113. The punch 111 is located at the bottom of the mold shank 114 and passes through the upper fixing plate 115. A disc-shaped first limiting block 1111 is provided on the top of the punch 111, and a first limiting groove (not shown) matching the first limiting block 1111 is provided on the top of the upper fixing plate 115. The upper fixing plate 115 is connected to the upper template 113 by a threaded component and presses down the first limiting block 1111. This structure allows for the detachable connection of the punch 111, facilitating maintenance and replacement.

[0033] Furthermore, the punch 112 is connected to the upper fixed plate 115 via a threaded connection. Specifically, the punch 112 has four threaded holes along its axial direction, which are evenly spaced around the axis of the punch 112 for connection with the upper fixed plate 115. In addition, the punch 112 also has two pin holes along its axial direction, which can be precisely positioned with the upper fixed plate 115 at corresponding positions via locating pins 130, maintaining the coaxiality of the punch 112, punch 111, and upper fixed plate 115.

[0034] A stripper rubber ring 116 is provided at the bottom of the upper fixed plate 115, and the stripper rubber ring 116 surrounds the punch 112; an annular stripper plate 117 is provided at the bottom of the stripper rubber ring 116. During the pressing down of the upper die assembly 110, the stripper plate 117 contacts the metal sheet, and as the stripper rubber ring 116 is compressed, it continuously applies pressure to the metal sheet to maintain the stability of the metal sheet.

[0035] Furthermore, such as Figure 3 As shown, the lower mold assembly 120 includes a lower template 123 and a lower fixing plate 124, with the lower fixing plate 124 positioned on top of the lower template 123. A circular second limiting block 1222 is provided at the bottom of the punch and die 122, and a second limiting groove matching the second limiting block 1222 is provided at the bottom of the lower fixing plate 124. The lower fixing plate 124 is connected to the lower template 123 via a threaded connection, pressing down the second limiting block 1222. This structure allows for detachable connection of the punch and die 122, facilitating maintenance and replacement.

[0036] The die cavity 121 and the lower fixed plate 124 are connected by threaded parts. Specifically, the die cavity 121 has four threaded holes along its axial direction, which are evenly distributed around the axis of the die cavity 121 for connection with the lower fixed plate 124. In addition, the die cavity 121 also has two pin holes along its axial direction, which can be precisely positioned with the lower fixed plate 124 at corresponding positions by locating pins 130 to maintain the coaxiality of the die cavity 121, the punch and die cavity 122, and the lower fixed plate 124.

[0037] Furthermore, a circular top plate 125 is provided within the second gap, and a top pin 1251 is provided at the bottom of the top plate 125. The top pin 1251 passes through the lower fixed plate 124 and the lower template 123 and is connected to the hydraulic drive device. During the downward pressing of the upper die assembly 110, the stamping protrusion 1121 is pressed into the second gap, compressing the top plate 125 downward. After stamping is completed, the top plate 125 rises under the drive of the hydraulic drive device, and ejects the stamped part from the second gap.

[0038] like Figure 1 As shown, the lower mold plate 123 has guide posts 126 arranged vertically, and the upper mold plate 113 is provided with guide sleeves 118 that slide with the guide posts 126. The cooperation between the guide posts 126 and the guide sleeves 118 can ensure the accuracy of mold closing and improve the stamping quality.

[0039] In summary, this utility model provides a composite stamping die 100 for a heat sink 200, comprising an upper die assembly 110 and a lower die assembly 120. The upper die assembly 110 includes a punch 112 and a punch head 111, and the lower die assembly 120 includes a die cavity 121 and a punch-die 122. During the die pressing process, punching is completed by the shearing force between the punch head 111 and the punch-die 122, trimming is completed by the shearing force between the punch head 112 and the die cavity 121, and flanging is completed under the extrusion of the punch-die 122 and the punch head 112. This composite stamping die 100 has a novel structure and can complete the punching, trimming, and flanging operations in one stamping operation, thereby improving processing efficiency and having good practical value.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite stamping die for a heat sink, characterized in that, The assembly includes an upper die assembly and a lower die assembly. The upper die assembly includes a punch and a plunger. The punch has a through-hole along its axial direction. The plunger is fitted into the first mounting hole and fits tightly with it. The bottom surface of the punch has an annular stamping ridge. The stamping ridge is positioned along the edge of the punch and forms a first gap with the plunger. The lower edge of the plunger is lower than the lower edge of the stamping ridge. The lower die assembly includes a die and a punch-die assembly. The die has a through-hole along its axial direction. The second mounting hole is provided in which the punch and die are disposed, and the top of the punch and die is flush with the top of the die. A second gap is formed between the outer wall of the punch and die and the inner wall of the die. The punch and die are provided with a through third mounting hole along their axial direction. When the upper die assembly and the lower die assembly are closed, the punch and die are inserted into the first gap, the stamping protrusion is inserted into the second gap, the punch is inserted into the third mounting hole, and a fourth gap is formed between the inner wall of the stamping protrusion and the outer wall of the punch and die.

2. The composite stamping die for heat sinks according to claim 1, characterized in that, The diameter of the punch is equivalent to the inner diameter of the third mounting hole, and the outer diameter of the stamping protrusion is equivalent to the inner diameter of the second mounting hole.

3. The composite stamping die for heat sinks according to claim 2, characterized in that, Both the inner edge of the bottom of the stamping protrusion and the outer edge of the top of the die are provided with rounded chamfers.

4. The composite stamping die for a heat sink according to claim 3, characterized in that, The upper mold assembly further includes an upper template, a mold shank, and an upper fixing plate. The upper template and the mold shank are coaxially arranged, and the upper fixing plate is located at the bottom of the upper template. The punch is located at the bottom of the mold shank and passes through the upper fixing plate. The top of the punch is provided with a disc-shaped first limiting block, and the top of the upper fixing plate is provided with a first limiting groove that matches the first limiting block. The upper fixing plate is connected to the upper template by a threaded component and presses down the first limiting block.

5. The composite stamping die for a heat sink according to claim 4, characterized in that, The punch is connected to the upper fixed plate by a threaded connection.

6. The composite stamping die for a heat sink according to claim 5, characterized in that, The bottom of the upper fixing plate is provided with a discharge rubber ring, which surrounds the punch; the bottom of the discharge rubber ring is provided with an annular discharge plate.

7. The composite stamping die for a heat sink according to claim 6, characterized in that, The lower mold assembly includes a lower template and a lower fixing plate. The lower fixing plate is disposed on the top of the lower template. The bottom of the punch and die is provided with a second annular limiting block. The bottom of the lower fixing plate is provided with a second limiting groove that matches the second limiting block. The lower fixing plate is connected to the lower template by a threaded component and presses down the second limiting block.

8. The composite stamping die for a heat sink according to claim 7, characterized in that, The die cavity and the lower fixed plate are connected by a threaded component.

9. The composite stamping die for a heat sink according to claim 8, characterized in that, A circular top plate is provided in the second gap, and a top pin is provided at the bottom of the top plate. The top pin passes through the lower fixing plate and the lower template and is connected to the hydraulic drive device.

10. The composite stamping die for a heat sink according to claim 9, characterized in that, The lower template has guide posts arranged in a vertical direction, and the upper template has guide sleeves that slide in cooperation with the guide posts.

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