Solid rivet for resistance rivet welding

Abstract

The utility model relates to the field of point connection, and discloses a solid rivet for resistance rivet welding, which comprises an upper electrode, a rivet cap is attached to the lower surface of the upper electrode, an upper workpiece is attached to the outer wall of the rivet cap, a rivet leg is fixedly connected to the lower surface of the rivet cap, the outer wall of the rivet leg is arranged inside the upper workpiece, and the lower surface of the upper electrode is fixedly connected with the lower surface of the rivet cap. A riveting assembly is arranged on the upper surface of the upper workpiece, a lower workpiece is arranged at the bottom of the rivet leg, the upper workpiece is attached to the lower workpiece, and a lower electrode is attached to the lower surface of the lower workpiece. According to the utility model, the solid rivet is firstly placed on the upper surface of the upper workpiece, and then the upper electrode is placed on the top cap and moves downwards, so that the problem that the connection part needs to be punched in advance through additional operation is solved, and the purposes of enhancing the penetrability of the rivet to the upper workpiece, reducing the process difficulty and cost and improving the process efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the field of point connection, and in particular to a solid rivet for resistance riveting. Background Technology

[0002] Solid rivets are common fastening components, typically made of metal, used to secure two or more workpieces together. A key characteristic of solid rivets is their solid center, which makes them stronger than hollow or tubular rivets, providing better structural support under tensile forces. Solid rivets are commonly used in applications requiring heavy loads, such as automotive, marine, construction, and manufacturing. Resistance riveting, a special welding technique, uses resistance heat to melt the base of the rivet, thus securing it to the workpiece. This method differs from traditional mechanical fastening methods like screws and nuts because welding provides a permanent, non-removable connection. Resistance riveting is often used in applications requiring high strength and durability, especially in environments that need to withstand vibration and shock.

[0003] In traditional resistance riveting, the use of solid rivets involves fixing the rivet to the workpiece and melting its base through resistance heating, thus fusing it with the workpiece to form a permanent, high-strength connection. First, the solid rivet is inserted through the workpieces to be joined, ensuring correct positioning. Then, an electric current is applied through the resistance riveting equipment, heating the base of the rivet to its melting point. The molten rivet material fills the joint between the workpieces. As the temperature cools, the rivet and workpiece material solidify and bond together, forming a strong weld.

[0004] When using the solid rivets for resistance riveting, additional equipment, time, and labor are required to pre-drill holes at the connection points in order to achieve a reliable connection between dissimilar metals. This leads to increased production and costs while reducing efficiency. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a solid rivet for resistance riveting, which aims to improve the problem that in order to achieve a reliable connection of dissimilar metals, additional equipment, time and labor are required to pre-drill holes at the connection point, resulting in increased production and costs while reducing efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a solid rivet for resistance riveting, comprising an upper electrode, a rivet head attached to the lower surface of the upper electrode, an upper workpiece attached to the outer wall of the rivet head, a rivet leg fixedly connected to the lower surface of the rivet head, the outer wall of the rivet leg disposed inside the upper workpiece, a riveting assembly disposed on the upper surface of the upper workpiece, a lower workpiece disposed at the bottom of the rivet leg, the upper workpiece and the lower workpiece being attached together, and a lower electrode attached to the lower surface of the lower workpiece.

[0007] Furthermore, the riveting assembly includes a workpiece melt, the lower surface of which is disposed on the upper surface of the upper workpiece, the inner wall of the rivet head is provided with an arc-shaped groove, and the outer wall of the workpiece melt is disposed on the inner wall of the arc-shaped groove.

[0008] Furthermore, the upper surface of the nail head is uniformly coated with a zirconium oxide coating.

[0009] Furthermore, a stainless steel layer is fixedly connected inside the nail head, and the zirconium oxide coating is disposed on top of the stainless steel layer.

[0010] Furthermore, the interior of the nail head is provided with a magnesium alloy, which is disposed below the stainless steel layer.

[0011] Furthermore, the outer wall of the spike leg is uniformly coated with an aluminum oxide coating.

[0012] Furthermore, the interior of the spike leg is made of magnesium alloy II, and the interior of the spike leg is made of low carbon steel.

[0013] Furthermore, the low-carbon steel is disposed on the inner side of the magnesium alloy II.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, a solid rivet is first placed on the upper surface of the upper workpiece, and then the upper electrode is placed above the top cap and moved downwards. Then, in conjunction with the lower motor, rivet leg, workpiece melt, and arc-shaped groove, the upper workpiece and the lower workpiece are connected. This solves the problem of needing additional operations to pre-drill holes at the connection point, thereby enhancing the penetration of the rivet into the upper workpiece, reducing the difficulty and cost of the process, and improving the process efficiency.

[0016] 2. In this utility model, the service life of the solid rivet is improved by first using the zirconium oxide coating on the outer wall of the top cap in combination with the stainless steel layer, and the alumina coating and low carbon steel inside the lower rivet leg. Then, the thermal conductivity is improved by combining magnesium alloy II with magnesium alloy II, thereby improving the durability of the connection point, extending the service life of the connection part, improving the welding quality, and reducing the risk of cracks and deformation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a solid rivet for resistance riveting proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the structure below the head of a solid rivet used for resistance riveting according to the present invention.

[0019] Figure 3This is a schematic diagram of the internal structure of the head of a solid rivet used for resistance riveting according to the present invention.

[0020] Legend:

[0021] 1. Upper electrode; 2. Nail head; 3. Upper workpiece; 4. Lower workpiece; 5. Lower electrode; 6. Melted workpiece; 7. Arc-shaped groove; 8. Zirconia coating; 9. Stainless steel layer; 10. Magnesium alloy one; 11. Alumina coating; 12. Magnesium alloy two; 13. Low carbon steel; 14. Nail leg. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 - Figure 2 An embodiment of this utility model provides a solid rivet for resistance riveting, comprising an upper electrode 1, a rivet head 2 attached to the lower surface of the upper electrode 1, an upper workpiece 3 attached to the outer wall of the rivet head 2, a rivet leg 14 fixedly connected to the lower surface of the rivet head 2, the outer wall of the rivet leg 14 disposed inside the upper workpiece 3, a riveting assembly disposed on the upper surface of the upper workpiece 3, a lower workpiece 4 disposed at the bottom of the rivet leg 14, the upper workpiece 3 and the lower workpiece 4 being attached together, a lower electrode 5 attached to the lower surface of the lower workpiece 4, the riveting assembly comprising a workpiece melt 6, the lower surface of the workpiece melt 6 disposed on the upper surface of the upper workpiece 3, an arc-shaped groove 7 disposed on the inner wall of the rivet head 2, and the outer wall of the workpiece melt 6 disposed on the inner wall of the arc-shaped groove 7.

[0024] Specifically, first, the nail head 2 and nail leg 14 are placed above the upper workpiece 3, with the tip of the nail leg 14 in contact with the surface of the upper workpiece 3, while the nail head 2 is positioned above. Then, the upper electrode 1 is placed above the nail head 2, ensuring close contact. Simultaneously, the lower electrode 5 is placed below the lower workpiece 4 and prepared to move upward to form a closed circuit with the upper electrode 1. Once everything is ready, the upper electrode 1 is activated. Due to the resistance heating, the connection between the upper workpiece 3 and the nail leg 14 begins to melt. As the current continues, the molten metal begins to be squeezed into the arc-shaped groove 7 of the nail head 2 along the nail leg 14. At the same time, the nail leg 14 continues to move downward, continuously entering the upper workpiece 3, ensuring that the nail leg 14 can completely penetrate the upper workpiece 3. Finally, when the bottom of the nail leg 14 is in contact with the lower workpiece 4, the resistance heating of the upper electrode 1 continues to heat the contact surface between the nail leg 14 and the lower workpiece 4, generating sufficient heat to form a molten nucleus, firmly connecting the two workpieces together to form a strong connection point.

[0025] Reference Figure 1 - Figure 3 The upper surface of the nail head 2 is uniformly coated with a zirconium oxide coating 8. The nail head 2 is fixedly connected with a stainless steel layer 9. The zirconium oxide coating 8 is located above the stainless steel layer 9. The nail head 2 is equipped with a magnesium alloy 10. The magnesium alloy 10 is located below the stainless steel layer 9. The outer wall of the nail leg 14 is uniformly coated with an aluminum oxide coating 11. The nail leg 14 is equipped with a magnesium alloy 2 12. The nail leg 14 is equipped with a low carbon steel 13. The low carbon steel 13 is located inside the magnesium alloy 2 12.

[0026] Specifically, firstly, the wear and corrosion resistance of the rivet head 2 is enhanced by the zirconium oxide coating 8 and the stainless steel layer 9. The stainless steel layer 9 provides additional strength and corrosion resistance, further extending the service life of the solid rivet. Secondly, to improve the thermal conductivity of the solid rivet, magnesium alloy 10 is added inside the rivet head 2, and magnesium alloy 12 is used inside the rivet leg 14. This allows for rapid heat transfer from the rivet head 2 to the rivet leg 14, achieving more efficient heat transfer. Low carbon steel 13 is used inside the rivet leg 14, and its surface is coated with an aluminum oxide coating 11. The low carbon steel 13 has high strength and toughness, effectively resisting external loads and deformation, while the aluminum oxide coating 11 provides additional protection for the rivet with its high hardness and good wear resistance, not only extending the service life of the solid rivet but also improving its stability in high-temperature and corrosive environments.

[0027] Working principle: When solid rivets for resistance riveting are needed, first place the rivet head 2 and rivet leg 14 above the upper workpiece 3 and move them downwards. Then place the upper electrode 1 above the rivet head 2 and the lower electrode 5 below the lower workpiece 4 and move it upwards. Then activate the upper electrode 1. Under the action of resistance heat, the connection between the upper workpiece 3 and the rivet leg 14 begins to melt and is squeezed into the arc-shaped groove 7 of the rivet head 2 along the rivet leg 14. At the same time, the rivet leg 14 continuously enters the upper workpiece 3 until the bottom of the rivet leg 14 is in contact with the lower workpiece 4. At this point, Under the resistance heating of the upper electrode 1, sufficient heat is generated at the contact surface between the rivet leg 14 and the lower workpiece 4 to form a molten nugget and achieve connection. Then, the zirconia coating 8 and the stainless steel layer 9 achieve wear resistance and corrosion resistance for the rivet head 2, improving the service life of the solid rivet. Next, the magnesium alloy 10 inside the rivet head 2 and the magnesium alloy 12 inside the rivet leg 14 improve the thermal conductivity. Finally, the low carbon steel 13 inside the rivet leg 14 and the alumina coating 11 improve the strength of the solid rivet, thus achieving the effect of improving thermal conductivity and strength.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solid rivet for resistance riveting, comprising an upper electrode, characterized in that: A nail head is attached to the lower surface of the upper electrode, an upper workpiece is attached to the outer wall of the nail head, a nail leg is fixedly connected to the lower surface of the nail head, the outer wall of the nail leg is disposed inside the upper workpiece, a riveting assembly is disposed on the upper surface of the upper workpiece, a lower workpiece is disposed at the bottom of the nail leg, the upper workpiece and the lower workpiece are attached to each other, and a lower electrode is attached to the lower surface of the lower workpiece.

2. A solid rivet for resistance riveting according to claim 1, characterized in that: The riveting assembly includes a workpiece melt, the lower surface of which is disposed on the upper surface of the upper workpiece, the inner wall of the rivet head is provided with an arc-shaped groove, and the outer wall of the workpiece melt is disposed on the inner wall of the arc-shaped groove.

3. A solid rivet for resistance riveting according to claim 1, characterized in that: The upper surface of the nail head is uniformly coated with a zirconium oxide coating.

4. A solid rivet for resistance riveting according to claim 3, characterized in that: The nail head is internally fixedly connected to a stainless steel layer, and the zirconium oxide coating is disposed on top of the stainless steel layer.

5. A solid rivet for resistance riveting according to claim 4, characterized in that: The nail head is internally provided with magnesium alloy one, which is located below the stainless steel layer.

6. A solid rivet for resistance riveting according to claim 1, characterized in that: The outer wall of the spike leg is uniformly coated with an aluminum oxide coating.

7. A solid rivet for resistance riveting according to claim 6, characterized in that: The interior of the nail leg is made of magnesium alloy II, and the interior of the nail leg is made of low carbon steel.

8. A solid rivet for resistance riveting according to claim 7, characterized in that: The low-carbon steel is disposed on the inner side of the magnesium alloy.

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