Metal piece fixing structure and machining method thereof

Abstract

The invention discloses a metal piece fixing structure which comprises a metal piece, a connector and a fixing rivet, the metal piece is provided with a fixing hole, the connector is provided with a mounting hole corresponding to the fixing hole, and the fixing rivet penetrates through the fixing hole to be embedded into the mounting hole and is matched with the connector to press and fix the metal piece; the method is characterized in that the connection reliability and consistency are greatly improved; the electrical performance is excellent and the temperature rise is reduced. In other words, the riveting deformation enables the red copper and the metal pieces on the two sides to generate huge contact pressure, and large-area and low-resistance ohmic contact is achieved. Therefore, the contact resistance is fundamentally reduced, heat generated when current passes through is greatly reduced, and the temperature rise performance of a product is remarkably improved. And the process adaptability is high, and the harsh requirement for connected base metal is lowered. The production efficiency is high and automation is easy. And the long-standing metal connection pain point in the plug and socket industry is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of electrical connection technology, and more specifically to a metal part fixing structure and its processing method. Background Technology

[0002] In the manufacturing of plugs and sockets for household and similar applications, reliable connections between metal components are crucial (such as the connecting tabs between the socket and the wires, and the connections between internal current-carrying components), directly affecting the product's conductivity, mechanical strength, and long-term safety. Currently, the industry commonly uses direct crimping for fixing. This process involves aligning two metal components to be connected, applying external pressure to cause plastic deformation and interlocking, thereby achieving mechanical fixation and electrical connection. However, in practical use, direct crimping has the following inherent drawbacks: 1. Poor consistency: The quality of crimping is highly dependent on the precision of the stamping equipment, the wear condition of the die, and the skill level of the operator. Any slight fluctuation can lead to inconsistencies in the contact area and clamping force at the crimping points, resulting in inconsistent product performance.

[0003] 2. High material dependence: The crimping effect is greatly affected by the hardness, elastic modulus, and surface condition (such as oxide layer, oil stains) of the metal material itself. If the material is too hard or the surface treatment is inadequate, it is difficult to form a tight, low-resistance contact point.

[0004] 3. Poor temperature rise performance: Due to the factors mentioned above, direct pressing points tend to form microscopic point contacts or localized contacts, rather than ideal surface contacts. This leads to higher contact resistance at these points. When current flows through, according to Joule's law (P = I... 2 The contact point generates a large amount of Joule heat, causing a localized temperature rise. Excessive temperature rise not only accelerates material oxidation, further increasing contact resistance and creating a vicious cycle that affects product lifespan and reliability, but also poses a fire hazard.

[0005] Therefore, there is an urgent need in this field for a metal connection solution that offers more stable connections, better conductivity, and effective temperature control. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a metal part fixing structure that is simple in structure, reliable in fixing, and has good electrical conductivity, and a processing method thereof.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a metal part fixing structure, including a metal sheet, a connector and a fixing rivet, wherein the metal sheet is provided with a fixing hole, the connector is provided with a mounting hole corresponding to the fixing hole, and the fixing rivet passes through the fixing hole and is embedded in the mounting hole, and cooperates with the connector to press and fix the metal sheet.

[0008] Preferably, the metal sheet is provided with a bent portion, and the fixing hole is opened in the bent portion; the advantage is that the bent portion facilitates the riveting and fixing of the fixing rivet and the installation and fixing of the metal sheet, and the bent portion also facilitates the alignment of the fixing hole and the mounting hole.

[0009] Furthermore, the connector is provided with a fixing post, the bent portion is aligned with the fixing post, and the mounting hole is opened on the fixing post. The size of the fixing post is not greater than the thickness of the connector. The advantage is that the fixing post facilitates the positioning and opening of the mounting hole, and the size of the fixing post can reduce interference during the installation process.

[0010] Furthermore, the mounting hole is arranged along the axial direction of the fixing column; the advantage is that the mounting hole, which is coaxial with the fixing column, can effectively increase the contact area between the fixing rivet and the plug, thereby increasing the fixing reliability.

[0011] Furthermore, the fixing rivet includes a rivet head and a rivet shank, the rivet shank being fixedly embedded in the mounting hole, and the rivet head being pressed onto the bent portion.

[0012] Preferably, the fixing rivet is made of copper.

[0013] Furthermore, the fixing post and the connector are integrally formed; the advantage is that the integrally formed connector and fixing post can effectively increase the stability of the connector.

[0014] Preferably, a clamping element is provided at the end of the metal sheet away from the fixing hole. The clamping element includes a connecting piece and a clamping piece. The two sides of the connecting piece are integrally formed and fixed with the metal sheet and the clamping piece, respectively. A clamping gap is provided between the clamping piece and the metal sheet. An inclined guide piece is provided on the upper side of both the metal sheet and the clamping piece. The advantage is that the clamping gap can be formed by the cooperation of the clamping piece and the metal sheet, which facilitates the clamping of the inserted connector. At the same time, the guide piece facilitates the guiding insertion of the connector.

[0015] A method for processing a metal part fixing structure as described in claim 1 includes the following steps: Step 1: Select the sheet material and cut it into a flat sheet of metal. Step 2: Bend the flat metal sheet and create the corresponding bends; Step 3: Punch holes in the bent portion from Step 2 to create fixing holes; Step 4: Select the sheet material and cut it to produce the connector and the fixing post on the connector; Step 5: Drill holes in the connector obtained in Step 4 to create mounting holes; Step 6: Fix the metal sheet obtained in Step 3 and the connector obtained in Step 5, and align the fixing hole with the mounting hole; Step 7: Insert the fixing rivet into the fixing hole and the mounting hole, and then press and rivet the rivet to fix it.

[0016] Furthermore, the fit clearance error between the fixing hole, mounting hole and fixing rivet is within 0.1mm; the advantage is that the fit between the fixing hole and mounting hole can ensure smooth installation while reducing the instability after assembly.

[0017] Compared with the prior art, the advantages of the present invention are: 1. Significantly improved connection reliability and consistency: Standardized copper rivets are used as the intermediate medium, ensuring stable dimensions and performance, eliminating inconsistencies caused by material differences and process fluctuations in direct crimping. The riveting process forms a mechanically interlocking structure, resulting in high connection strength and good vibration and fatigue resistance.

[0018] 2. Excellent electrical performance and reduced temperature rise: Copper is an excellent conductor of electricity. When used as a rivet filler at the connection interface, it greatly improves the current path. The riveting deformation creates enormous contact pressure between the copper and the metal parts on both sides, achieving a large-area, low-resistance ohmic contact. This fundamentally reduces contact resistance, significantly reducing the heat generated when current flows, thereby significantly improving the product's temperature rise performance.

[0019] 3. Strong process adaptability: This invention can achieve good connection of metal parts with different materials and surface conditions (such as brass sleeves and nickel-plated copper strips), reducing the stringent requirements on the base material being connected.

[0020] 4. High production efficiency and easy automation: This riveting process is easy to automate, with fast riveting speed and stable and controllable quality, which helps to improve production efficiency and product yield.

[0021] In summary, this invention effectively solves the long-standing problem of metal connection in the plug and socket industry through a simple yet ingenious structural improvement, providing a high-performance, high-reliability connection solution with significant market application value. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the present invention; Figure 4 This is one of the usage state diagrams of the present invention; Figure 5 This is the second usage state diagram of the present invention; Figure 6 This is a schematic diagram of the internal structure of the converter of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0026] As attached Figure 1-3 The metal part fixing structure shown includes a metal sheet 1, a connector 2, and a fixing rivet 3. The metal sheet 1 is provided with a fixing hole 1.2, and the connector is provided with a mounting hole 2.2 corresponding to the fixing hole 1.2. The fixing rivet 3 passes through the fixing hole 1.2 and is embedded in the mounting hole 2.2, and cooperates with the connector to press and fix the metal sheet 1.

[0027] Specifically, the aforementioned metal sheet 1 is provided with a bent portion 1.1, and a fixing hole 1.2 is formed in the bent portion 1.1. The bent portion 1.1 facilitates the riveting and fixing of the fixing rivet 3 and the installation and fixing of the metal sheet 1. The aforementioned connector 2 is provided with a fixing post 2.1, the bent portion 1.1 is aligned with the fixing post, and the mounting hole 2.2 is formed on the fixing post 2.1. The size of the fixing post 2.1 is not greater than the thickness of the connector. More preferably, the mounting hole 2.2 is arranged along the axial direction of the fixing post 2.1; the advantage is that the mounting hole 2.2, which is coaxial with the fixing post 2.1, can effectively increase the contact area between the fixing rivet 3 and the connector 2, thereby increasing the fixing reliability.

[0028] It is worth mentioning that the aforementioned fixing rivet 3 includes a rivet head 3.1 and a rivet rod 3.2. The rivet rod 3.2 is fixedly embedded in the mounting hole 2.2, and the rivet head 3.1 is pressed onto the bent portion 1.1. The section of the rivet rod 3.2 away from the rivet head 3.1 is tapered, which facilitates the guiding insertion of the fixing rivet 3 into the mounting hole 2.2.

[0029] The fixing rivet 3 described in this invention is made of copper.

[0030] To ensure the stability of the fixing post 2.1 and the plug-in part 2, the fixing post 2.1 and the plug-in part 2 are integrally formed.

[0031] The metal sheet of this invention is further provided with a clamping element at the other end away from the fixing hole. The clamping element includes a connecting piece 1.4 and a clamping piece 1.3. The two sides of the connecting piece are integrally formed and fixed with the metal sheet and the clamping piece, respectively. A clamping gap 1.5 is provided between the clamping piece and the metal sheet. An inclined guide piece 1.6 is provided on the upper side of both the metal sheet and the clamping piece. The clamping gap 1.5 is formed by the cooperation of the clamping piece 1.3 and the metal sheet, which facilitates the clamping of the inserted connector. At the same time, the guide piece 1.6 facilitates the guiding insertion of the connector.

[0032] A method for processing a metal part fixing structure specifically includes the following steps: Step 1: Select the sheet material and cut it into a flat sheet of metal sheet 1; Step 2: Bend the flat sheet of metal sheet 1 and fold out the corresponding bent part 1.1; Step 3: Punch the bent part 1.1 in Step 2 to machine the fixing hole 1.2; Step 4: Select a plate and cut it to produce the connector 2 and the fixing post 2.1 on the connector 2; Step 5: Drill holes in the connector 2 obtained in step 4 to create mounting holes 2.2; Step 6: Fix the metal sheet 1 obtained in step 3 and the connector 2 obtained in step 5, and align the fixing hole 1.2 with the mounting hole 2.2; Step 7: Insert the fixing rivet 3 into the fixing hole 1.2 and the mounting hole 2.2, and then press and rivet the rivet to fix it.

[0033] It is worth mentioning that the clearance error between the aforementioned fixing hole 1.2, mounting hole 2.2, and fixing rivet 3 is within 0.1mm. The advantage is that the fit between the fixing hole 1.2 and mounting hole 2.2 ensures smooth installation while reducing instability after assembly. Furthermore, a conductivity test can be performed after assembly to ensure reliable conductivity between the metal sheet 1 and the connector 2.

[0034] As attached Figure 4-6 As shown, the present invention can be applied to the fields of sockets and converters. The plug 2, the fixing rivet 3 and the metal plate 1 are a group, and the three groups are installed together in the retainer 5 and then fixed in the converter housing 4 to realize the use as a converter.

[0035] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A metal part fixing structure, characterized in that, It includes a metal sheet, a connector, and a fixing rivet. The metal sheet is provided with a fixing hole, and the connector is provided with a mounting hole corresponding to the fixing hole. The fixing rivet passes through the fixing hole and is embedded in the mounting hole, and cooperates with the connector to press and fix the metal sheet.

2. The metal part fixing structure according to claim 1, characterized in that, The metal sheet is provided with a bent portion, and the fixing hole is formed in the bent portion.

3. The metal part fixing structure according to claim 2, characterized in that, The connector is provided with a fixing post, the bent part is aligned with the fixing post, and the mounting hole is opened on the fixing post.

4. The metal part fixing structure according to claim 3, characterized in that, The mounting holes are provided along the axial direction of the fixed column.

5. A metal part fixing structure according to claim 4, characterized in that, The fixing rivet includes a rivet head and a rivet shank, the rivet shank is fixedly embedded in the mounting hole, and the rivet head is pressed onto the bent portion.

6. The metal part fixing structure according to claim 1, characterized in that, The fixing rivet is made of copper.

7. A metal part fixing structure according to claim 3, characterized in that, The fixing post and the plug-in component are integrally formed.

8. A metal part fixing structure according to claim 1, characterized in that, A clamping element is provided at the other end of the metal sheet away from the fixing hole. The clamping element includes a connecting piece and a clamping piece. The two sides of the connecting piece are integrally formed and fixed with the metal sheet and the clamping piece, respectively. A clamping gap is provided between the clamping piece and the metal sheet. Inclined guide pieces are provided on the upper side of both the metal sheet and the clamping piece.

9. A method for processing a metal part fixing structure as described in claim 1, characterized in that, Includes the following steps: Step 1: Select the sheet material and cut it into a flat sheet of metal. Step 2: Bend the flat metal sheet and create the corresponding bends; Step 3: Punch holes in the bent portion from Step 2 to create fixing holes; Step 4: Select the sheet material and cut it to produce the connector and the fixing post on the connector; Step 5: Drill holes in the connector obtained in Step 4 to create mounting holes; Step 6: Fix the metal sheet obtained in Step 3 and the connector obtained in Step 5, and align the fixing hole with the mounting hole; Step 7: Insert the fixing rivet into the fixing hole and the mounting hole, and then press and rivet the rivet to fix it.

10. A method for processing a metal part fixing structure according to claim 9, characterized in that, The clearance error between the fixing hole, mounting hole and fixing rivet is within 0.1mm.

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