Riveting stud die

Abstract

The utility model discloses a stud riveting die which is used for pressing and riveting a stud on a thin workpiece, the stud comprises a stud body with a connecting cavity, a riveting part arranged at the lower end of the stud body and a riveting cavity arranged in the riveting part and communicated with the connecting cavity, a plurality of tooth parts are arranged on the periphery of the riveting part, a plurality of annular grooves are formed in the thin workpiece, and the tooth parts are arranged in the annular grooves. The protruding part surrounded by the annular groove is connected with the riveting cavity so as to be used for positioning the stud and comprises an upper die and a lower die, and the lower die comprises a lower die assembly and a plurality of positioning pins, the lower die assembly is provided with a bearing face used for bearing the thin workpiece, and the positioning pins are arranged on the bearing face and used for positioning the thin workpiece; the upper die comprises an upper die assembly provided with a pressing face used for pressing a thin workpiece, a plurality of installation cavities formed in the pressing face and a plurality of riveting punches installed in the installation cavities in a one-to-one correspondence mode. After the die is closed, the riveting punch can punch the stud corresponding to the riveting punch in position and the protruding part in the riveting cavity, so that the stud is riveted on the thin workpiece, the tool is special, and the machining precision is higher.

Description

Technical Field

[0001] This utility model belongs to the field of notebook computer shell processing technology, specifically relating to a rivet stud mold. Background Technology

[0002] Laptops contain numerous internal components, such as the motherboard, hard drive, memory, and heatsink. These components typically require screws for mounting, and riveting studs to the metal exterior parts provides a reliable anchor point for the screws.

[0003] Existing riveting structures typically involve creating flat-bottomed grooves or through holes in thin workpieces (laptop casings), and then using a mold to rivet the studs into the corresponding grooves or through holes. However, under tensile stress, the connection between the stud and the casing is prone to loosening or separation, resulting in insufficient tensile strength. Existing riveting structures can no longer meet the current development needs of the laptop industry, necessitating the design of a new riveting structure that significantly improves tensile strength. To effectively process this new riveting structure, existing molds are insufficient to meet its technological requirements. Therefore, designing a dedicated mold specifically for this new riveting structure is essential. This dedicated mold can precisely process the new riveting structure, ensuring a more robust connection between the stud and the casing. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a rivet stud mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stud die is used to press-fit a stud onto a thin workpiece. The stud includes a column with a connecting cavity, a riveting portion located at the lower end of the column, and a riveting cavity located within the riveting portion and communicating with the connecting cavity. The riveting portion has a plurality of teeth on its outer periphery. The thin workpiece has a plurality of annular grooves, and a protrusion surrounded by the annular grooves can be connected within the riveting cavity to position the stud.

[0007] The lower mold includes a lower mold assembly having a bearing surface for bearing a thin workpiece and a plurality of locating pins disposed on the bearing surface for positioning the thin workpiece.

[0008] The upper die cooperates with the lower die and is located above the lower die. The upper die includes an upper die assembly having a pressing surface for pressing thin workpieces, a plurality of mounting cavities provided on the pressing surface, and a plurality of riveting punches installed in the mounting cavities one by one.

[0009] After the mold is closed, the riveting punch can press the studs and protrusions in the riveting cavity corresponding to the position, thereby riveting the studs onto the thin workpiece.

[0010] Furthermore, the upper mold assembly includes an upper mold base, an upper pad, and an upper template connected sequentially from top to bottom. The end face of the upper template away from the upper pad is defined as a pressing surface. The pressing surface is provided with a plurality of annular bosses protruding in a direction away from the upper pad. The plurality of annular bosses are concentrically arranged with the mounting cavity in a corresponding manner.

[0011] After the mold is closed, the annular boss is used to stamp the teeth.

[0012] Furthermore, the mounting cavity includes an integrally formed limiting cavity and a through cavity. The limiting cavity is distributed close to the upper pad and the inner diameter of the limiting cavity is larger than the inner diameter of the through cavity. One end of the riveting punch is installed in the limiting cavity, while the other end passes through the through cavity and protrudes outside the through cavity.

[0013] Furthermore, the riveting punch includes a limiting section disposed in the limiting cavity, a main body section connected to the lower end of the limiting section and accommodated in the through cavity, and a punch section fixed to the lower end of the main body section and partially exposed outside the through cavity. The outer diameter of the limiting section is larger than the outer diameter of the main body section, and the outer diameter of the main body section is larger than the outer diameter of the punch section.

[0014] After the mold is closed, the lower end face of the main body section is used to stamp the column, while the punch section can extend into the riveting cavity to stamp the protrusion.

[0015] Furthermore, the upper template is also provided with several clearance cavities whose positions correspond one-to-one with the positioning pins and are used to avoid the positioning pins.

[0016] Furthermore, the lower mold assembly includes a lower template, a lower pad, a lower mold base, several lower pads, and a lower support plate arranged sequentially from top to bottom. The end face of the lower template near the upper mold is defined as a bearing surface, and several inner limiting members for limiting the stroke of the upper mold are provided in the lower template.

[0017] Furthermore, the lower template is provided with a number of guide posts distributed at various corner positions, and guide cavities corresponding to the guide posts are opened at corresponding positions on the pressing surface. Each guide cavity is fitted with a guide sleeve, and the guide post can reciprocate within the guide sleeve.

[0018] In summary, the beneficial effects of this utility model are as follows: 1. This mold is specifically designed for riveting structures with added riveting parts, which can better meet the processing requirements of specific products, help improve product consistency, and ensure product quality stability. 2. The segmented structure design of the riveting punch makes the riveting operation more efficient, enabling multiple riveting actions to be completed simultaneously, reducing the time of the riveting process, adapting to the needs of large-scale production, and saving production time and labor costs. 3. The integrally formed limiting cavity and through cavity on the upper template provide precise installation positioning for the riveting punch. The limiting cavity restricts the position of the riveting punch, ensuring that it will not undergo lateral displacement during operation, thus guaranteeing the accuracy of riveting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a new type of riveting mechanism that is required for the riveting of this mold.

[0020] Figure 2 yes Figure 1 A schematic diagram of the stud structure.

[0021] Figure 3 yes Figure 1 A three-dimensional structural diagram of a medium-thin workpiece.

[0022] Figure 4 This is a structural schematic diagram of a rivet stud mold provided by this utility model.

[0023] Figure 5 yes Figure 4 A schematic diagram of the mold in the closed state.

[0024] Figure 6 This is a schematic diagram of the structure of the lower mold assembly that positions a thin workpiece in this utility model.

[0025] Figure 7 This is a three-dimensional structural diagram of the upper mold in this utility model.

[0026] Figure 8 yes Figure 7 A magnified view of part A in the middle.

[0027] Figure 9 This is a top view of the upper template in this utility model.

[0028] Figure 10 yes Figure 9 Sectional view along the AA direction.

[0029] Figure 11 yes Figure 10 A magnified view of part B in the middle.

[0030] In the diagram, 100-stud, 110-pillar, 111-connecting cavity, 120-riveting part, 121-riveting cavity, 122-tooth part, 200-thin workpiece, 210-annular groove, 220-protrusion, 300-lower mold, 310-lower mold assembly, 311-lower template, 3110-inner limiting part, 3111-guide post, 312-lower pad, 313-lower mold base, 314-lower foot, 315-lower support plate 320-Positioning pin, 400-Upper mold, 410-Upper mold assembly, 411-Upper mold base, 412-Upper pad, 413-Upper template, 4130-Annular boss, 4131-Allowing cavity, 4132-Guide sleeve, 420-Mounting cavity, 421-Limiting cavity, 422-Through cavity, 430-Riveting punch, 431-Limiting section, 432-Main body section, 433-Punch section, 500-Pin, 600-Bolt. Detailed Implementation

[0031] The present invention will be further explained below with reference to specific illustrations.

[0032] Please see Figure 1 A riveting structure that can increase the riveting parts includes a stud 100 and a thin workpiece 200.

[0033] Please see Figure 2 The stud 100 to be riveted includes a column 110 having a connecting cavity 111, a riveting part 120 located at the lower end of the column 110, and a riveting cavity 121 located in the riveting part 120 and communicating with the connecting cavity 111. The outer periphery of the riveting part 120 is provided with a plurality of teeth 122.

[0034] Please refer to the following before riveting: Figure 3 The thin workpiece 200 to be processed is provided with several annular grooves 210, and the protrusions 220 surrounded by the annular grooves 210 can be connected in the riveting cavity 121 to position the stud 100.

[0035] Please see Figure 4 and Figure 5This utility model provides a stud die for riveting studs 100 onto thin workpieces 200. The die includes a lower die 300 and an upper die 400 that cooperates with and is located above the lower die 300. The lower die 300 includes a lower die assembly 310 with a bearing surface for supporting the thin workpiece 200 and a plurality of locating pins 320 disposed on the bearing surface for positioning the thin workpiece 200. The upper die 400 includes an upper die assembly 410 with a pressing surface for holding the thin workpiece 200, a plurality of mounting cavities 420 disposed on the pressing surface, and a plurality of riveting punches 430 correspondingly installed in the mounting cavities 420. When the die is closed, the riveting punches 430 can press the studs 100 corresponding to their positions and the protrusions 220 in the riveting cavity 121, thereby riveting the studs 100 onto the thin workpiece 200. By closing the upper mold 400 and the lower mold 300, the annular groove 210 and the protrusion 220 connected to the stud 100 undergo plastic deformation, thereby tightly connecting the stud 100 to the thin workpiece 200. After the riveting process is completed, the processed product, compared with the traditional riveting structure with through holes, will not expose the stud and stamping marks on the outer surface of the shell; and compared with the traditional riveting structure with flat-bottomed grooves, because the protrusion 220 undergoes plastic deformation in the riveting cavity 121 to achieve riveting with the riveting cavity 121, and the annular groove 210 undergoes plastic deformation to rivet with the riveting part 120, the number of riveting areas is increased, improving the product's tensile strength. The upper mold 400 and the lower mold 300 have a reasonable structural design, the locating pin 320 can quickly and accurately position the thin workpiece 200, and the riveting punch 430 corresponds one-to-one with the mounting cavity 420, making the mold closing process efficient and orderly. In mass production, the riveting operation of stud 100 and thin workpiece 200 can be completed quickly, reducing production time and labor costs. Specifically designed for riveting structures with additional riveting points, its specialized and precise machining helps improve product consistency.

[0036] Please see Figure 6 The lower mold assembly 310 includes, from top to bottom, a lower template 311, a lower pad 312, a lower mold base 313, several lower pads 314, and a lower support plate 315. The lower template 311, lower pad 312, lower mold base 313, several lower pads 314, and lower support plate 315 are connected and fixed by several pins 500 and bolts 600. The end face of the lower template 311 near the upper mold 400 is defined as a bearing surface. The thin workpiece 200 is provided with several positioning holes for the positioning pins 320 to pass through. Through the cooperation of the positioning pins 320 and the positioning holes, the thin workpiece 200 is positioned on the bearing surface. The stud 100 is installed in the annular groove 210, so that the protrusion 220 is connected in the riveting cavity 121 to position the stud 100, which facilitates the riveting process of the upper mold 400 and the lower mold 300.

[0037] The lower template 311 is provided with several inner limiting parts 3110 for limiting the stroke of the upper die 400. The function of the inner limiting parts 3110 is to limit the stroke of the upper die 400 during the mold closing process in order to control the stamping depth.

[0038] The lower template 311 is provided with a number of guide posts 3111 distributed at various corner positions. Guide cavities corresponding to the guide posts 3111 are opened at corresponding positions on the pressing surface. Each guide cavity is fitted with a guide sleeve 4132. The guide posts 3111 can reciprocate within the guide sleeve 4132. The cooperation between the guide posts 3111 and the guide sleeve 4132 can provide precise guidance for the movement of the upper mold 400.

[0039] Please see Figure 7 The upper mold assembly 410 includes an upper mold base 411, an upper pad 412, and an upper mold template 413 connected sequentially from top to bottom. The upper mold base 411, upper pad 412, and upper mold template 413 are connected by pins 500 and bolts 600. The end face of the upper mold template 413 away from the upper pad 412 is defined as a pressing surface. Please refer to [link to relevant documentation]. Figure 8 The pressing surface is provided with several annular bosses 4130 protruding in a direction away from the upper pad 412, and the annular bosses 4130 are concentrically arranged with the mounting cavity 420. After the upper mold 400 moves down and closes, the annular bosses 4130 are used to press the teeth 122. Under pressure, the teeth 122 cut into the thin workpiece 200, causing the workpiece material to undergo plastic deformation and fill the gaps of the teeth 122. Finally, the teeth 122 are tightly joined with the thin workpiece 200, and the teeth 122 are embedded in the workpiece to form a reliable connection. This structure can prevent the stud 100 from rotating around its own axis in the horizontal direction, and the riveting is stable and reliable.

[0040] The upper template 413 is also provided with several clearance cavities 4131 that correspond one-to-one with the positioning pins 320 and are used to avoid the positioning pins 320, so as to avoid interfering with the mold closing operation.

[0041] Please see Figure 9 and Figure 10 The mounting cavity 420 on the upper template 413 includes an integrally formed limiting cavity 421 and a through cavity 422. The limiting cavity 421 is located near the upper pad 412, and its inner diameter is larger than that of the through cavity 422. One end of the riveting punch 430 is installed in the limiting cavity 421, while the other end passes through the through cavity 422 and protrudes outside the through cavity 422. The annular boss 4130 is adjacent to the port of the through cavity 422. The integrally formed limiting cavity 421 and through cavity 422 provide precise installation positioning for the riveting punch 430. The limiting cavity 421, being close to the upper pad 412 and having an inner diameter larger than that of the through cavity 422, can restrict the position of the riveting punch 430, ensuring that it does not undergo lateral displacement during operation, thereby guaranteeing the accuracy of riveting.

[0042] Please see Figure 11 The riveting punch 430 includes a limiting section 431 disposed in a limiting cavity 421, a main body section 432 connected to the lower end of the limiting section 431 and housed in a through cavity 422, and a punch section 433 fixed to the lower end of the main body section 432 and partially exposed outside the through cavity 422. The outer diameter of the limiting section 431 is larger than the outer diameter of the main body section 432, and the outer diameter of the main body section 432 is larger than the outer diameter of the punch section 433. When the mold is closed, the column 110 enters the through cavity 422 and contacts the lower end face of the main body section 432. The main body section 432 is used to punch the upper end face of the column 110, while the punch section 433 can extend into the riveting cavity 121 to punch the upper end face of the protrusion 220. The main body section 432 is housed within the through cavity 422, and its lower end face is used to stamp the column 110. The punch section 433 extends into the riveting cavity 121 to stamp the protrusion 220. This segmented structural design makes the riveting operation more efficient. Different parts are stamped for different structures, enabling multiple riveting actions to be completed simultaneously, reducing the time of the riveting process and improving production efficiency.

[0043] The working process of this mold is as follows: using the positioning holes on the thin workpiece 200, the thin workpiece 200 with several annular grooves 210 is positioned on the bearing surface by passing a positioning pin 320 through the positioning hole. The studs 100 that need to be riveted are assembled one by one on the annular grooves 210, so that the riveting cavity 121 of the stud 100 is connected with the protrusion 220 in the middle of the annular groove 210, thereby positioning the position of the stud 100. Then, the upper die 400 moves down to close the die. The punch section 433 of the riveting punch 430 extends into the riveting cavity 121 to punch the protrusion 220. The column 110 of the stud 100 enters the through cavity 422 and contacts the main body section 432 of the riveting punch 430. The main body section 432 punches the column 110, so that the riveting part 120 is riveted with the annular groove 210. The annular boss 4130 punches the tooth 122, so that the tooth 122 is riveted with the surface of the thin workpiece 200, thus completing the riveting process between the stud 100 and the thin workpiece 200.

[0044] This mold has the following characteristics: 1. It is specifically designed for riveting structures with 120 riveting positions, better meeting the processing needs of specific products, improving product consistency, and ensuring stable product quality. 2. The segmented structure design of the riveting punch 430 makes the riveting operation more efficient, enabling multiple riveting actions to be completed simultaneously, reducing the time required for riveting processes, adapting to the needs of large-scale production, and saving production time and labor costs. 3. The integrally formed limiting cavity 421 and through cavity 422 on the upper template 413 provide precise installation positioning for the riveting punch 430. The limiting cavity 421 restricts the position of the riveting punch 430, ensuring that it does not undergo lateral displacement during operation and guaranteeing riveting accuracy.

[0045] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A stud die for press-fitting studs onto thin workpieces, the stud comprising a column having a connecting cavity, a riveting portion disposed at the lower end of the column, and a riveting cavity disposed within the riveting portion and communicating with the connecting cavity, the riveting portion having a plurality of teeth on its outer periphery, the thin workpiece having a plurality of annular grooves, and a protrusion surrounded by the annular grooves being able to connect within the riveting cavity for positioning the stud, characterized in that... include: The lower mold includes a lower mold assembly having a bearing surface for bearing a thin workpiece and a plurality of locating pins disposed on the bearing surface for positioning the thin workpiece. The upper die cooperates with the lower die and is located above the lower die. The upper die includes an upper die assembly having a pressing surface for pressing thin workpieces, a plurality of mounting cavities provided on the pressing surface, and a plurality of riveting punches installed in the mounting cavities one by one. After the mold is closed, the riveting punch can press the studs and protrusions in the riveting cavity corresponding to the position, thereby riveting the studs onto the thin workpiece.

2. The rivet stud mold according to claim 1, characterized in that: The upper mold assembly includes an upper mold base, an upper pad, and an upper template connected sequentially from top to bottom. The end face of the upper template away from the upper pad is defined as a pressing surface. The pressing surface is provided with a plurality of annular bosses protruding in a direction away from the upper pad. The plurality of annular bosses are concentrically arranged with the mounting cavity in a corresponding manner. After the mold is closed, the annular boss is used to stamp the teeth.

3. The rivet stud mold according to claim 2, characterized in that: The mounting cavity includes an integrally formed limiting cavity and a through cavity. The limiting cavity is located close to the upper pad and its inner diameter is larger than that of the through cavity. One end of the riveting punch is installed in the limiting cavity, while the other end passes through the through cavity and protrudes outside the through cavity.

4. The stud mold according to claim 3, characterized in that: The riveting punch includes a limiting section disposed in the limiting cavity, a main body section connected to the lower end of the limiting section and accommodated in the through cavity, and a punch section fixed to the lower end of the main body section and partially exposed outside the through cavity. The outer diameter of the limiting section is larger than the outer diameter of the main body section, and the outer diameter of the main body section is larger than the outer diameter of the punch section. After the mold is closed, the lower end face of the main body section is used to stamp the column, while the punch section can extend into the riveting cavity to stamp the protrusion.

5. The rivet stud mold according to claim 2, characterized in that: The upper template is also provided with several clearance cavities that correspond one-to-one with the positioning pins and are used to avoid the positioning pins.

6. The rivet stud mold according to any one of claims 1-5, characterized in that: The lower mold assembly includes a lower template, a lower pad, a lower mold base, several lower pads, and a lower support plate arranged sequentially from top to bottom. The end face of the lower template near the upper mold is defined as a bearing surface, and several inner limiting members are provided in the lower template to limit the stroke of the upper mold.

7. The stud mold according to claim 6, characterized in that: The lower template is provided with a number of guide posts distributed at various corner positions. Guide cavities corresponding to the guide posts are opened at corresponding positions on the pressing surface. Each guide cavity is fitted with a guide sleeve, and the guide post can reciprocate within the guide sleeve.

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