Energy storage welding machine and welding method thereof

Abstract

The present application relates to the technical field of integrated circuit manufacturing, and discloses a stored-energy welding machine and a welding method thereof, the stored-energy welding machine being used for welding a tube shell and a cap, and comprising an upper electrode and a lower electrode; the upper electrode is provided with a plurality of lead grooves, the positions of the lead grooves correspond to leads on the tube shell one by one; the diameter of each lead groove is greater than the diameter of the corresponding lead but less than the diameter of an insulator connected to the lead, and the height of the insulator is lower than the upper end face and the lower end face of the tube shell; in the welding process, each lead is inserted into the corresponding lead groove, and the lead groove does not directly contact the lead and the insulator; the lower electrode is provided with a cap positioning groove, the cap can be embedded into the cap positioning groove after being inverted, and the tube shell is inverted on the cap. The stored-energy welding machine provided by the present application can significantly reduce the circuit indentation without reducing the quality of the weld.

Description

Technical Field

[0001] This invention relates to the field of integrated circuit manufacturing technology, and more specifically, to an energy storage welding machine and a welding method for the energy storage welding machine. Background Technology

[0002] Energy storage welding, due to its concentrated energy and short discharge time, is widely used in the field of electronic components. During the welding process, the electrode needs to apply a certain pressure and release current instantaneously, melting and connecting the coating of the casing and cap through resistance heating. Using electrodes made of a single material and traditional energy storage welding processes, the instantaneous current and electrode pressure acting together on the casing and cap during welding may lead to: 1. Excessive indentation on the circuit surface: The electrode is pressed directly onto the relatively soft surface of the casing / cap, forming obvious indentations that affect the appearance and flatness of the circuit.

[0003] 2. Electrode wear: Electrodes made of a single material are prone to deformation and wear under high temperature and high pressure, affecting welding consistency and electrode life.

[0004] Existing solutions often focus on reducing welding energy and pressure, but this can lead to insufficient welding strength and discontinuous welds that cause circuit leakage. Therefore, there is an urgent need for a method that can improve the surface quality and appearance of the circuit from the electrode structure itself. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy storage welding machine and its welding method, which significantly reduces circuit indentation without compromising weld quality.

[0006] As a first aspect of the present invention, an energy storage welding machine is provided for welding a tube shell and a cap. The energy storage welding machine includes an upper electrode and a lower electrode. The upper electrode is provided with a plurality of lead wire grooves, the positions of which correspond one-to-one with the leads on the tube shell. The diameter of each lead wire groove is larger than the diameter of the corresponding lead wire, but smaller than the diameter of the insulator connected to the root of the lead wire. The height of the insulator is lower than the upper and lower end faces of the tube shell. During the welding process, each lead wire passes through the corresponding lead wire groove, and the lead wire groove does not directly contact the lead wire or the insulator. The lower electrode is provided with a cap positioning groove, and the cap can be embedded in the cap positioning groove when inverted. The tube shell is inverted on the cap.

[0007] Furthermore, the upper electrode is provided with an upper electrode positioning groove, and the lower electrode is provided with a lower electrode positioning groove. The upper electrode positioning groove and the lower electrode positioning groove are used to fix the upper electrode and the lower electrode onto the main body of the energy storage welding machine, respectively.

[0008] Furthermore, the lower electrode is also provided with a shell positioning pin, which is concentrically engaged with the shell positioning groove on the shell, and is used to precisely invert the shell onto the cap during the welding process.

[0009] Furthermore, the inner diameter of the cap positioning groove is larger than the outer diameter of the cap body and smaller than the outer diameter of its brim, so that the cap can be stably embedded in the cap positioning groove when it is inverted.

[0010] Furthermore, both the upper electrode and the lower electrode are made of beryllium bronze.

[0011] As a second aspect of the present invention, a welding method for an energy storage welding machine is provided for welding a pipe shell and a cap, the welding method for the energy storage welding machine comprising: Step S1: Fix the upper electrode and the lower electrode onto the main body of the energy storage welding machine using the upper electrode positioning groove and the lower electrode positioning groove, respectively; Step S2: Set the parameters of the energy storage welding machine: voltage 300-600 V, pressure 30-100 N; Step S3: Place the cap face down in the cap positioning groove of the lower electrode; Step S4: Invert the completed die-mounted and bonded shell onto the cap and fit its shell positioning groove into the shell positioning pin of the lower electrode. Step S5: Start the energy storage welding machine, control the upper electrode to descend, each lead wire is inserted into the corresponding lead wire groove, the bottom surface of the upper electrode contacts the upper end surface of the tube shell, and the lower electrode contacts the cap. At the moment of contact, the upper electrode and the lower electrode release current and pressure, so that the coating of the tube shell and the cap melts and welds into one piece. Step S6: After welding is completed, lift the upper electrode to end the welding process.

[0012] The energy storage welding machine and welding method provided by this invention have the following advantages: First, the problem of circuit indentation can be better avoided through specific design. Second, it does not require reducing welding pressure and energy, ensuring stable heat and pressure during welding. Finally, this optimized method only involves electrodes and does not require modification of equipment and systems; therefore, the method is low-cost and easy to implement. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof.

[0014] Figures 1-3 This is a schematic diagram of the energy storage welding machine of the present invention.

[0015] In the diagram: 1. Upper electrode; 2. Lower electrode; 3. Tube shell; 4. Cap; 5. Upper electrode positioning groove; 6. Lead wire groove; 7. Lead wire; 8. Insulator; 9. Tube shell positioning groove; 10. Cap positioning groove; 11. Tube shell positioning pin; 12. Lower electrode positioning groove. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the energy storage welding machine and its welding method proposed according to the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0018] In explaining this invention, it should be noted that the terms "installation," "connection," and "linking" should be interpreted broadly unless otherwise specified. For example, a connection can be a fixed connection, a connection through a special interface, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] This embodiment uses a TO19-08 circuit as an example.

[0020] This embodiment provides an energy storage welding machine, such as Figures 1-3As shown, the energy storage welding machine is used to weld the shell 3 and the cap 4. The energy storage welding machine includes an upper electrode 1 and a lower electrode 2. The upper electrode 1 is provided with multiple lead wire grooves 6, and the positions of the lead wire grooves 6 correspond one-to-one with the leads 7 on the shell 3. The diameter of each lead wire groove 6 is larger than the diameter of the corresponding lead 7, but smaller than the diameter of the insulator 8 connected to the root of the lead wire. The height of the insulator 8 is lower than the upper and lower end faces of the shell 3. During the welding process, each lead 7 passes through the corresponding lead wire groove 6, and the lead wire groove 6 does not directly contact the lead 7 and the insulator 8. The lower electrode 2 is provided with a cap positioning groove 10. The cap 4 can be embedded in the cap positioning groove 10 after being inverted, and the shell 3 is inverted on the cap 4.

[0021] Preferably, the upper electrode 1 is provided with an upper electrode positioning groove 5, and the lower electrode 2 is provided with a lower electrode positioning groove 12. The upper electrode positioning groove 5 and the lower electrode positioning groove 12 are used to fix the upper electrode 1 and the lower electrode 2 respectively on the main body of the energy storage welding machine.

[0022] Preferably, the lower electrode 2 is further provided with a shell positioning pin 11, which is concentrically engaged with the shell positioning groove 9 on the shell 3, and is used to precisely invert the shell 3 onto the cap 4 during the welding process.

[0023] Preferably, the inner diameter of the cap positioning groove 10 is larger than the outer diameter of the cap body of the cap 4 and smaller than the outer diameter of its brim, so that the cap 4 can be stably embedded in the cap positioning groove 10 after being inverted.

[0024] Preferably, both the upper electrode 1 and the lower electrode 2 are made of beryllium bronze, a material with low hardness and high conductivity.

[0025] Specifically, the upper electrode 1 is designed according to the dimensions of the tube shell 3, the lead wire 7, and the insulator 8. During welding, the lead wire groove 6 of the upper electrode 1 is suspended and does not directly contact the insulator 8 and the tube shell plating, thus protecting the insulator 8 from circuit leakage while also protecting the tube shell plating.

[0026] It should be noted that the lower electrode 2 is slotted according to the size of the cap 4, and the cap 4 is placed upside down in the lower electrode 2. The upper electrode 1 needs to be designed according to the different packaging forms of the tube shell 3, and slots are made for each lead 7. The size is determined by the diameter of the lead 7 and the glass insulator 8. Since the height of the insulator 8 is lower than the plane on the back of the tube shell, the slotted position is suspended and does not directly contact the insulator 8 and the tube shell plating. This protects the insulator and reduces the risk of circuit leakage, and also reduces the pressure of the electrode on the tube shell plating to protect the tube shell plating. This design can effectively improve the problem of hard indentation in the circuit. This optimized design does not require sacrificing welding strength and pressure, nor does it require modification of the energy storage welding machine host and system, saving modification costs.

[0027] This invention optimizes the structural design and material selection of traditional electrodes, whose dimensions need to be designed according to the outer shape of the casing and the size of the cap. The core improvement of this invention lies in the electrode design. The cap 4 is placed upside down in the lower electrode 2, and the lower electrode 2 is slotted according to the size of the cap 4 to fix the cap 4. The casing positioning pin 11 is designed according to the casing 3 to fix the casing 3. The design of the upper electrode 1 is modified according to the circuit packaging form. The conventional design of the upper electrode is to slot out the position of one ring of leads. After the soldering is completed, this slot will create a ring of indentation on the circuit surface. In order to improve this problem, this invention optimizes the upper electrode by slotting at the position of each lead 7. The slot size is larger than the lead diameter but smaller than the diameter of the insulator 8 at the root of the lead. Since the height of the insulator 8 is lower than the upper and lower surfaces of the casing 3, the slot position is suspended and does not directly contact the insulator 8 and the casing plating, which protects the insulator and reduces the risk of circuit leakage, and also protects the circuit plating.

[0028] As another embodiment of the present invention, a welding method for an energy storage welding machine is provided for welding a shell 3 and a cap 4. The welding method for the energy storage welding machine includes: Step S1: Fix the upper electrode 1 and the lower electrode 2 onto the main body of the energy storage welding machine through the upper electrode positioning groove 5 and the lower electrode positioning groove 12 respectively; Step S2: Set the parameters of the energy storage welding machine: voltage 300-600 V, pressure 30-100 N; wherein, the voltage is preferably 400 V and the pressure is preferably 50 N; Step S3: Place the cap 4 upside down in the cap positioning groove 10 of the lower electrode 2; Step S4: Invert the shell 3, which has been assembled and bonded, onto the cap 4, and fit its shell positioning groove 9 into the shell positioning pin 11 of the lower electrode 2. Step S5: Start the energy storage welding machine, control the upper electrode 1 to descend and apply pressure, each lead 7 is inserted into the corresponding lead groove 6, the bottom surface of the upper electrode 1 contacts the upper end surface of the tube shell 3, and the lower electrode 2 contacts the cap 4. At the moment of contact, the upper electrode 1 and the lower electrode 2 release current and pressure, so that the coating of the tube shell 3 and the cap 4 melts and welds into one piece. Step S6: After welding is completed, lift the upper electrode 1 to end the welding process.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An energy storage welding machine, said energy storage welding machine being used for welding a pipe shell (3) and a cap (4), characterized in that, The energy storage welding machine includes an upper electrode (1) and a lower electrode (2); wherein, the upper electrode (1) is provided with multiple lead wire grooves (6), the positions of the lead wire grooves (6) correspond one-to-one with the lead wires (7) on the shell (3); the diameter of each lead wire groove (6) is larger than the diameter of the corresponding lead wire (7), but smaller than the diameter of the insulator (8) connected to the root of the lead wire, the height of the insulator (8) is lower than the upper and lower end faces of the shell (3), during the welding process, each lead wire (7) passes through the corresponding lead wire groove (6), and the lead wire groove (6) does not directly contact the lead wire (7) and the insulator (8); the lower electrode (2) is provided with a cap positioning groove (10), the cap (4) can be embedded in the cap positioning groove (10) after being inverted, and the shell (3) is inverted on the cap (4).

2. The energy storage welding machine according to claim 1, characterized in that, The upper electrode (1) is provided with an upper electrode positioning groove (5), and the lower electrode (2) is provided with a lower electrode positioning groove (12). The upper electrode positioning groove (5) and the lower electrode positioning groove (12) are used to fix the upper electrode (1) and the lower electrode (2) on the main body of the energy storage welding machine respectively.

3. The energy storage welding machine according to claim 1, characterized in that, The lower electrode (2) is also provided with a shell positioning pin (11), which is concentrically matched with the shell positioning groove (9) on the shell (3) to precisely invert the shell (3) onto the cap (4) during the welding process.

4. The energy storage welding machine according to claim 1, characterized in that, The inner diameter of the cap positioning groove (10) is larger than the outer diameter of the cap body (4) and smaller than the outer diameter of its brim, so that the cap (4) can be stably embedded in the cap positioning groove (10) after being inverted.

5. The energy storage welding machine according to claim 1, characterized in that, Both the upper electrode (1) and the lower electrode (2) are made of beryllium bronze.

6. A welding method for an energy storage welding machine as described in any one of claims 1 to 5, used for welding a casing (3) and a cap (4), characterized in that, The welding method of the energy storage welding machine includes: Step S1: Fix the upper electrode (1) and lower electrode (2) onto the main body of the energy storage welding machine through the upper electrode positioning groove (5) and the lower electrode positioning groove (12); Step S2: Set the parameters of the energy storage welding machine: voltage 300-600 V, pressure 30-100 N; Step S3: Place the cap (4) upside down in the cap positioning groove (10) of the lower electrode (2); Step S4: Invert the tube shell (3) that has been assembled and bonded onto the cap (4) and fit its tube shell positioning groove (9) into the tube shell positioning pin (11) of the lower electrode (2). Step S5: Start the energy storage welding machine, control the upper electrode (1) to descend, each lead wire (7) is inserted into the corresponding lead wire groove (6), the bottom surface of the upper electrode (1) contacts the upper end surface of the tube shell (3), the lower electrode (2) contacts the cap (4), at the moment of contact the upper electrode (1) and the lower electrode (2) release current and pressure, so that the coating of the tube shell (3) and the cap (4) melts and welds into one piece; Step S6: After welding is completed, lift the upper electrode (1) to end the welding process.

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