Resistance welding electrode and resistance welding device

Abstract

The utility model belongs to the technical field of automatic welding, and particularly relates to a resistance welding electrode and a resistance welding device. The electric connector comprises a lower electrode, the top surface of the lower electrode is provided with a lower semi-circular groove and a terminal groove, the lower semi-circular groove penetrates through the terminal groove, the lower semi-circular groove is matched with a copper wire, the terminal groove is matched with an insertion spring terminal, and the terminal groove is provided with a positioning protrusion corresponding to a hollow hole of the insertion spring terminal; the bottom surface of the upper electrode is also provided with an upper semicircular groove and a receding groove, the upper semicircular groove is matched with the copper wire, a cavity of the receding groove corresponds to the insertion spring terminal, the size of the cavity of the receding groove is larger than or equal to that of the insertion spring terminal, and a pressing groove is further formed between the upper semicircular groove and the receding groove. The welding electrode is used for solving the technical problem that the welding efficiency is reduced due to the fact that the welding electrode of the resistance welding machine in the prior art cannot quickly and accurately position a copper wire and an insertion spring terminal.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic welding, and particularly relates to a resistance welding electrode and a resistance welding device. Background Art

[0002] As Figure 5 shown, the connection methods between copper wires and plug spring terminals generally include crimping connection and welding. Among them, welding is more firm and reliable. Therefore, when copper wires and plug spring terminals are applied in key positions, welding connection methods are mostly used. Existing welding methods include ordinary soldering and resistance welding. In ordinary soldering, an electric soldering iron is used to heat and melt the solder wire for reinforcement welding after terminal riveting. Sometimes the solder does not melt properly, and sometimes there are problems with solder feeding, resulting in virtual soldering and unsoldered phenomena. Resistance welding is achieved by self-heating and fusing at the contact position between the plug spring terminal and the copper wire through low voltage and large current. There are no virtual soldering and missed soldering phenomena, and the tensile force of the welding strength is greater than 25KG. However, the contact surface of the welding electrode of the existing resistance welding machine is flat, making it difficult to fix the copper wire and the plug spring terminal, and it is easy to deviate during the welding process, affecting the welding effect and work efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a resistance welding electrode and a resistance welding device, which are used to solve the technical problem that the welding electrode of the existing resistance welding machine cannot quickly and accurately position the copper wire and the plug spring terminal, resulting in reduced welding efficiency.

[0004] The technical solution for the utility model to solve the above technical problem is as follows: A resistance welding electrode includes:

[0005] A lower electrode, on the top surface of which a lower semi-circular groove and a terminal groove are opened. The lower semi-circular groove penetrates through the terminal groove. The lower semi-circular groove is adapted to the copper wire, and the terminal groove is adapted to the plug spring terminal. A positioning protrusion is provided at the position corresponding to the hollow hole of the plug spring terminal in the terminal groove;

[0006] An upper electrode, on the bottom surface of which an upper semi-circular groove and a relief groove are also opened. The upper semi-circular groove is adapted to the copper wire, the cavity of the relief groove corresponds to the plug spring terminal, and the cavity of the relief groove is greater than or equal to the volume of the plug spring terminal. A pressing groove is also provided between the upper semi-circular groove and the relief groove.

[0007] In the utility model, a lower semi-circular groove and a terminal groove are opened on the top surface of the lower electrode, which can limit the copper wire and the plug spring terminal. The positioning protrusion can limit the movement of the plug spring terminal. When the copper wire is inserted into the wire groove of the plug spring terminal, the copper wire will not push out the plug spring terminal. In addition, the upper semi-circular groove of the upper electrode can also limit the copper wire, and the pressing groove can press the wire groove of the plug spring terminal into an arc shape, making the contact area between the plug spring terminal and the copper wire larger and improving the welding strength.

[0008] Further: The positioning protrusion is a movable spring protrusion;

[0009] The lower electrode includes an electrode cap and an electrode post. The electrode cap is threadedly connected to the electrode post. The electrode cap is provided with a receiving cavity. A through hole is formed in the top surface of the electrode cap. The spring protrusion is inserted into the through hole. A spring is provided between the bottom surface of the spring protrusion and the electrode post.

[0010] Beneficial effects of this step: If the positioning protrusion is fixed, it is more difficult to place the plug-in terminal compared to a movable positioning protrusion; when the positioning protrusion is movable, during the process of placing the plug-in terminal in the terminal slot, the plug-in terminal can press down the positioning protrusion until it reaches the position, and then the positioning protrusion will pop up and catch the plug-in terminal; from the perspective of the placement action, the original plug-in terminal needs to be aligned with the terminal slot and placed above the terminal slot, while when the positioning protrusion is movable, the plug-in terminal can be pushed flat into the terminal slot, with lower placement difficulty and faster speed.

[0011] The present utility model further provides a resistance welding device, including:

[0012] The resistance welding electrode as described above, the upper electrode and the lower electrode are respectively installed in the upper electrode seat and the lower electrode seat;

[0013] A power supply component, the positive and negative electrodes of the power supply component are respectively electrically connected to the upper electrode seat and the lower electrode seat.

[0014] The plug-in terminal and the copper wire are welded together by using the current provided by the power supply component.

[0015] Further: The power supply component includes a transformer, an inverter, and a switching element connected in sequence.

[0016] Beneficial effects of this step: Alternating current is converted into direct current with low voltage and high current for welding work.

[0017] Further: A current sensor is also provided, and the current sensor is electrically connected to the controller.

[0018] Beneficial effects of this step: Under normal circumstances, for the same copper wire and plug-in terminal, when parameters such as voltage and welding time remain unchanged, the welding current should be stable within a certain range, and only when a fault occurs will the magnitude of the current change; therefore, the welding quality can be judged according to the magnitude or stability of the detected welding current.

[0019] The beneficial effects of the present utility model are:

[0020] 1. The upper and lower electrodes with slots, as well as the positioning protrusions on the lower electrode, limit the copper wire and the plug terminal, enabling the rapid positioning of the copper wire and the plug terminal during the welding process to improve the welding efficiency.

[0021] 2. The movable positioning protrusions can make the operation of placing the plug terminal smoother, which not only plays a positioning role but also does not affect the efficiency of placing the plug terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic top view structure of the lower electrode in a resistance welding electrode provided by the present invention;

[0024] Figure 2 Schematic bottom view structure of the upper electrode in a resistance welding electrode provided by the present invention;

[0025] Figure 3 For Figure 2 Cross-sectional view of part A - A in

[0026] Figure 4 Schematic semi-sectional view structure of another embodiment of the lower electrode in a resistance welding electrode provided by the present invention;

[0027] Figure 5 Stereogram of the product for resistance welding.

[0028] Reference Signs:

[0029] 1 - Lower electrode; 2 - Upper electrode; 3 - Plug terminal; 4 - Copper wire;

[0030] 11 - Lower semi-circular groove; 12 - Terminal groove; 13 - Electrode cap; 14 - Electrode post; 15 - Positioning protrusion; 16 - Spring; 21 - Upper semi-circular groove; 22 - Pressing groove; 23 - Relief groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe in detail the embodiments of the technical solutions of the present invention with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and thus are only examples and cannot be used to limit the protection scope of the present invention.

[0032] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those skilled in the art to which this utility model belongs.

[0033] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this utility model.

[0034] In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0035] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] Embodiment

[0038] As Figure 1 shown, a resistance welding electrode provided by this utility model includes:

[0039] Lower electrode 1, on the top surface of the lower electrode 1, a lower semi-circular groove 11 and a terminal groove 12 are provided. Among them, the lower semi-circular groove 11 penetrates through the terminal groove 12. The lower semi-circular groove 11 is adapted to the copper wire 4, and the terminal groove 12 is adapted to the plug spring terminal 3. A positioning protrusion 15 is provided at the position corresponding to the hollow hole of the plug spring terminal 3 in the terminal groove 12;

[0040] Upper electrode 2, on the bottom surface of the upper electrode 2, an upper semi-circular groove 21 and a relief groove 23 are also provided. The upper semi-circular groove 21 is adapted to the copper wire 4. The cavity of the relief groove 23 corresponds to the plug spring terminal 3, and the cavity of the relief groove 23 is greater than or equal to the volume of the plug spring terminal 3. A pressing groove 22 is further provided between the upper semi-circular groove 21 and the relief groove 23. The pressing groove 22 corresponds to the wire groove of the plug spring terminal 3.

[0041] In this embodiment, the outer shapes of the upper electrode 2 and the lower electrode 1 are both combinations of a square convex platform and a cylinder. The square convex platform is the working area. On the top surface of the lower electrode 1, a lower semi-circular groove 11 and a terminal groove 12 are provided, which can limit the copper wire 4 and the plug spring terminal 3. The positioning protrusion 15 can limit the movement of the plug spring terminal 3. When the copper wire 4 is inserted into the wire groove of the plug spring terminal 3, the copper wire 4 will not push out the plug spring terminal 3; in addition, the upper semi-circular groove 21 of the upper electrode 2 can also limit the copper wire 4, and the pressing groove 22 can press the wire groove of the plug spring terminal 3 into an arc shape, closely adhering to the copper wire 4, so that the contact area between the plug spring terminal 3 and the copper wire 4 is larger, improving the welding strength.

[0042] On the basis of the above technical solution, the positioning protrusion 15 is a movable spring protrusion;

[0043] The lower electrode 1 includes an electrode cap 13 and an electrode post 14. The electrode cap 13 is threadedly connected to the electrode post 14. The electrode cap 13 is provided with a receiving cavity. A through hole is provided on the top surface of the electrode cap 13. The spring protrusion is inserted into the through hole, and a spring 16 is provided between the bottom surface of the spring protrusion and the electrode post 14.

[0044] Among them, the shapes of the spring protrusion and the through hole are set according to the shape of the hollow part of the plug spring terminal 3. It can be a round hole, or it can be a long slot hole. It can be a single hole, or it can be a multi-hole; whether it is a single hole or a multi-hole, the spring protrusion includes a spring pressing plate and a protrusion column provided on the spring pressing plate; substantially, the protrusion column passes through the through hole, and both the spring pressing plate and the spring 16 below the spring pressing plate are in the receiving cavity of the electrode cap 13.

[0045] For the fixed positioning protrusion 15 and the relatively movable positioning protrusion 15, it is more difficult to place the plug-in spring terminal 3; when the positioning protrusion 15 is movable, during the process of placing the plug-in spring terminal 3 in the terminal slot 12, the plug-in spring terminal 3 can press down the positioning protrusion 15 until it reaches the position, and then the positioning protrusion 15 will bounce up to clamp the plug-in spring terminal 3; from the perspective of the placement action, the original plug-in spring terminal 3 needs to be aligned with the terminal slot 12 and placed above the terminal slot 12, while when the positioning protrusion 15 is movable, the plug-in spring terminal 3 can be pushed flat into the terminal slot 12, with lower placement difficulty and faster speed.

[0046] The present utility model further provides a resistance welding device, including:

[0047] The resistance welding electrodes as described above, wherein the upper electrode 2 and the lower electrode 1 are respectively installed in the upper electrode seat and the lower electrode seat;

[0048] A power supply assembly, the positive and negative poles of the power supply assembly are respectively electrically connected to the upper electrode seat and the lower electrode seat.

[0049] Using the power supply assembly to provide current to weld the plug-in spring terminal and the copper wire together.

[0050] Based on the above technical solution, the power supply assembly includes a transformer, an inverter and a switching element connected in sequence.

[0051] The transformer and the inverter convert alternating current into direct current with low voltage and large current for welding work, and the switching element can be implemented by using thyristors, transistors, field effect transistors or IGBTs.

[0052] Based on the above technical solution, a current sensor is further provided, and the current sensor is electrically connected to the controller.

[0053] Under normal circumstances, for the same copper wire and plug-in spring terminal, when parameters such as voltage and welding time remain unchanged, the welding current should be stable within a certain range, and only when a fault occurs will the magnitude of the current change; therefore, the welding quality can be judged according to the magnitude or stability of the detected welding current. Once the current value detected by the current sensor does not match the current value preset in the controller, the controller can stop the operation of the resistance welder and send an audible and visual alarm to the operator.

[0054] Or automatically adjust the current magnitude through the PID algorithm.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resistance welding electrode, characterized in that, Comprising: A lower electrode, on the top surface of which a lower semi-circular groove and a terminal groove are provided, wherein the lower semi-circular groove penetrates through the terminal groove, the lower semi-circular groove is adapted to a copper wire, the terminal groove is adapted to a plug terminal, and a positioning protrusion is provided at the position corresponding to the hollow hole of the plug terminal in the terminal groove; An upper electrode, on the bottom surface of which an upper semi-circular groove and a relief groove are provided, the upper semi-circular groove is adapted to the copper wire, the cavity of the relief groove corresponds to the plug terminal, and the cavity of the relief groove is greater than or equal to the volume of the plug terminal. A pressing groove is further provided between the upper semi-circular groove and the relief groove.

2. The resistance welding electrode according to claim 1, wherein The positioning protrusion is a movable spring protrusion; The lower electrode includes an electrode cap and an electrode post, the electrode cap is threadedly connected to the electrode post, the electrode cap is provided with a receiving cavity, a through hole is provided on the top surface of the electrode cap, the spring protrusion is inserted into the through hole, and a spring is provided between the bottom surface of the spring protrusion and the electrode post.

3. A resistance welding device, characterized in that, Comprising: The resistance welding electrode according to claim 1 or 2, wherein the upper electrode and the lower electrode are respectively installed in an upper electrode seat and a lower electrode seat; A power supply assembly, the positive and negative poles of which are respectively electrically connected to the upper electrode seat and the lower electrode seat.

4. The resistance welding device according to claim 3, characterized in that, The power supply assembly includes a transformer, an inverter and a switching element connected in sequence.

5. The electric resistance welding apparatus according to claim 4, wherein A current sensor is further provided, and the current sensor is electrically connected to a controller.

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