Voltage pulse seal welding machine filled with protective gas after vacuumizing

Abstract

The utility model discloses a voltage pulse sealing welding machine filled with protective gas after vacuumizing. The voltage pulse sealing welding machine comprises a rack, a lifting device, a welding device, an air interchanger and an electrical device, wherein the lifting device, the welding device, the air interchanger and the electrical device are arranged on the rack; when elements are sealed and welded in an electric pulse mode, the upper sealing cylinder and the lower sealing cylinder are matched to form a sealed space, a workpiece is located in the sealed space, vacuumizing and protective gas filling can be carried out, and therefore an air port does not need to be formed in the workpiece, and certainly, the air port does not need to be blocked after gas filling, and the sealing effect is good. The working efficiency is high, the process is simple, and cost control is facilitated; in addition, the upper electrode, the lower electrode and the workpiece are communicated to form a loop, the convex ribs at the joint of the workpiece are melted by utilizing voltage pulse, the workpiece is sealed and welded, the welding quality is good, and the sealing and welding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a sealing and welding device, in particular to a voltage pulse sealing and welding machine that fills a protective gas after vacuum pumping. Background Art

[0002] A sealing and welding machine is one of the core devices widely used in the manufacturing process of electronic devices. It can ensure the complete isolation of the inside of the device from the external environment, prevent harmful gases, moisture, dust, etc. from entering the inside of the device, and affect the performance and lifespan of the device. This is particularly important for electronic devices that require high reliability, such as automotive-grade electronic device products.

[0003] In the prior art, the sealing and welding of electronic devices is mostly completed by using a laser sealing and welding machine, which plays an important role in the fields of microelectronic packaging, semiconductor packaging, optical device packaging, etc. It can irradiate a high-energy laser beam onto the workpiece, quickly melt the surface of the workpiece and reach the temperature required for welding, and then achieve the sealing and welding of the workpiece. The energy of the laser beam is highly concentrated and can melt the metal in a very short time to form a welded joint.

[0004] However, the laser sealing and welding technology still has many deficiencies. We found that the devices processed by the laser sealing and welding machine may have the problem of incomplete sealing and welding, resulting in the inside of the device not being hermetically protected, which also greatly affects the lifespan and performance of the electronic device. In addition, the efficiency of laser sealing and welding is not high enough to meet the increasing processing requirements.

[0005] Therefore, there is an urgent need for a sealing and welding machine that can ensure the sealing and welding effect and has high welding efficiency, which can be applied to the production and processing of electronic devices. Summary of the Utility Model

[0006] The utility model provides a voltage pulse sealing and welding machine that fills a protective gas after vacuum pumping. The voltage pulse sealing and welding machine of the utility model can first evacuate the inside of the device, fill it with a protective gas, and then use the current to do work to generate heat to melt the materials at the welding part to form a whole, achieving welding. The welding quality is good and the efficiency is high.

[0007] The technical solution of the utility model is as follows:

[0008] Voltage Pulse Sealing Welder with Protective Gas Filling after Vacuum Extraction, comprising a frame and a lifting device, a welding device, a ventilation device, and an electrical device provided on the frame; the lifting device includes a lifting cylinder and an electrode mounting post that can be driven by the lifting cylinder; an installation plate is provided on the upper part of the frame, the lifting cylinder is installed on the installation plate, and the lifting cylinder is connected to the electrode mounting post through a connecting shaft; the welding device includes a matching upper electrode assembly and a lower electrode assembly; the upper electrode assembly includes a sliding sleeve, an upper mold, an upper electrode, and an upper sealing cylinder; the lower electrode assembly includes a bottom plate, a lower base, a lower mold, a lower electrode, and a lower sealing cylinder; an upper annular platform is provided at the upper end of the upper mold, the upper annular platform cooperates with the bottom groove of the electrode mounting post, and the upper electrode sleeved at the bottom end of the electrode mounting post is pressed and fixed on the electrode mounting post; the sliding sleeve is sleeved outside the electrode mounting post, the upper sealing cylinder is sleeved outside the upper electrode, and the upper end of the upper sealing cylinder is fixedly connected to the sliding sleeve; a limiting step for limiting the sliding sleeve is provided at the lower part of the electrode mounting post, correspondingly, a compression spring is sleeved on the electrode mounting post, and the lower end of the compression spring abuts against the upper end of the sliding sleeve; the bottom plate is provided on the workbench of the frame, the lower base is provided on the bottom plate, a lower annular platform is provided at the lower end of the lower mold, the lower annular platform cooperates with the upper groove of the lower base, and the lower electrode sleeved at the top end of the lower base is pressed and fixed on the lower base; the lower sealing cylinder is sleeved outside the lower electrode and is fixedly connected to the lower base; the lower sealing cylinder and the upper sealing cylinder can form a seal after cooperation; the ventilation device includes a vacuum extraction pipe, a protective gas filling pipe, a vacuum device, and a protective gas filling device, the vacuum device and the protective gas filling device are respectively connected to the vacuum extraction pipe and the protective gas filling pipe; the vacuum extraction pipe and the protective gas filling pipe are connected to the air holes on the lower base through a three-way structure; solenoid valves are provided on both the vacuum extraction pipe and the protective gas filling pipe; the electrical device includes a welding transformer; the two poles on the output side of the welding transformer are respectively connected to the upper electrode and the lower electrode.

[0009] Compared with the prior art, the present utility model uses the method of electric pulse to seal-weld components. During welding, through the cooperation between the upper sealing cylinder and the lower sealing cylinder, a sealed space is formed, and the workpiece is in this sealed space, where vacuum extraction and protective gas filling can be carried out, so there is no need to set air vents on the workpiece, and of course, there is no need to block the air vents after gas filling. The working efficiency is high, and the process is simple, which is beneficial to controlling production costs; in addition, the present utility model connects the upper and lower electrodes to the workpiece to form a circuit, and uses voltage pulses to melt the ribs at the joint of the workpiece, realizing the sealing welding of the workpiece. The sealing welding quality is good, and the sealing welding efficiency is improved.

[0010] Furthermore, in the aforementioned voltage pulse seam welder that evacuates the air and then fills it with a protective gas, guide columns are provided in pairs on the frame. A sliding plate is provided on the electrode mounting post, and the sliding plate is slidably connected to the guide columns through sliding bearings. The guide columns can ensure precise guidance during movement, guaranteeing that the upper part of the welding device can move linearly up and down, avoiding deviation or shaking, and effectively improving the reliability of the equipment.

[0011] Furthermore, in the aforementioned voltage pulse seam welder that evacuates the air and then fills it with a protective gas, a water cooling system is provided on the electrode mounting post; the water cooling system includes a water cooling chamber provided inside the electrode mounting post, and a cooling water inlet pipe joint and a cooling water outlet pipe joint correspondingly provided on the side of the electrode mounting post. Thus, cooling water can be introduced after seam welding for rapid cooling, which is beneficial to improving work efficiency and can also avoid problems such as equipment damage caused by excessive temperature, extending the service life of the equipment. Further, the cooling water inlet pipe joint and the cooling water outlet pipe joint are installed at the top of the electrode mounting post; the outlet of the cooling water inlet pipe joint is connected with a diversion pipe, and the diversion pipe extends to the bottom of the water cooling chamber. With this structure, the cooling water has a long flow path and high cooling efficiency. Further, for convenience of implementation, the cooling water inlet pipe joint is threadedly connected to the upper end of the water cooling chamber.

[0012] Furthermore, in the aforementioned voltage pulse seam welder that evacuates the air and then fills it with a protective gas, a relief hole for the ejector post to move is provided at the center of the lower base. A cylinder is provided in the bottom plate, the top of the cylinder is hermetically connected to the lower base, and its piston rod is fixedly connected to the ejector post. Through the design of this ejecting structure, the workpiece can be ejected after seam welding is completed, making it easy to take out the workpiece.

[0013] Furthermore, in the aforementioned voltage pulse seam welder that evacuates the air and then fills it with a protective gas, a seal ring installation groove is provided at the upper end of the lower sealing cylinder, and a seal ring is provided in the seal ring installation groove. The seal ring installed on the lower sealing cylinder can make the upper sealing cylinder and the lower sealing cylinder completely sealed, improving the purity of the protective gas inside the device after seam welding, thereby improving the finished product quality of the electronic device.

[0014] Furthermore, in the aforementioned voltage pulse seam welder that evacuates the air and then fills it with a protective gas, the upper electrode and the electrode mounting post are threadedly connected to each other; the lower electrode and the lower base are threadedly connected to each other. Thus, during assembly, it is only necessary to tighten along the thread, which is easy to implement.

[0015] Further, in the voltage pulse sealing machine that evacuates and then fills with a protective gas, the upper end of the upper sealing cylinder is connected to the sliding sleeve by a thread; the lower sealing cylinder is connected to the lower base by a thread. The thread structure facilitates the replacement of the upper sealing cylinder and the lower sealing sleeve to adapt to workpieces of different specifications. Still further, sealing rings are provided between the upper sealing cylinder and the sliding sleeve and between the lower sealing cylinder and the lower base. The design of the sealing rings can further ensure the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the voltage pulse sealing machine of the present invention that evacuates and then fills with a protective gas;

[0017] Figure 2 is a side view of the voltage pulse sealing machine of the present invention that evacuates and then fills with a protective gas;

[0018] Figure 3 is a schematic structural view of the processing object of the voltage pulse sealing machine of the present invention that evacuates and then fills with a protective gas.

[0019] The reference numerals in the drawings are: 1 - frame; 2 - lifting cylinder; 3 - mounting plate; 4 - connecting shaft; 5 - sliding sleeve; 6 - electrode mounting post; 601 - limiting step; 7 - sliding plate; 8 - guide post; 9 - upper die; 901 - upper annular table; 10 - upper electrode; 11 - upper sealing cylinder; 12 - bottom plate; 13 - lower base; 1301 - air hole; 14 - lower die; 1401 - lower annular table; 15 - lower electrode; 16 - lower sealing cylinder; 1601 - sealing ring mounting groove; 17 - evacuation tube; 18 - protective gas filling tube; 19 - welding transformer; 20 - sliding bearing; 21 - ejecting post; 22 - cylinder; 2201 - piston rod; 23 - compression spring; 24 - workpiece one; 2401 - rib; 25 - water cooling system; 2501 - water cooling cavity; 2502 - cooling water inlet pipe joint; 2503 - cooling water outlet pipe joint; 2504 - drainage pipe; 26 - workpiece two. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention will be further described below with reference to the drawings and embodiments, but it shall not be used as a basis for the present invention. The content not described in detail in the following embodiments is common technical knowledge in the art.

[0021] Embodiment (see Figures 1-3 ):

[0022] The voltage pulse sealing machine that evacuates and then fills with a protective gas includes a frame and a lifting device, a welding device, a gas replacement device, and an electrical device provided on the frame. During operation, the lifting device, the welding device, the gas replacement device, and the electrical device cooperate to achieve sealing welding.

[0023] The lifting device includes a lifting cylinder 2 and an electrode mounting post 6 that can be driven by the lifting cylinder 2; an installation plate 3 is provided on the upper part of the frame, the lifting cylinder 2 is installed on the installation plate 3, and the lifting cylinder 2 is connected to the electrode mounting post 6 through a connecting shaft 4.

[0024] The welding device includes a matching upper electrode assembly and a lower electrode assembly; the upper electrode assembly includes a sliding sleeve 5, an upper die 9, an upper electrode 10, and an upper sealing cylinder 11; the lower electrode assembly includes a bottom plate 12, a lower base 13, a lower die 14, a lower electrode 15, and a lower sealing cylinder 16; an upper annular platform 901 is provided at the upper end of the upper die 9, the upper annular platform 901 is matched with the bottom groove of the electrode mounting post 6, and is pressed and fixed on the electrode mounting post 6 through the upper electrode 10 sleeved at the bottom end of the electrode mounting post 6; the upper electrode 10 and the electrode mounting post 6 are connected to each other by threads; the sliding sleeve 5 is sleeved outside the electrode mounting post 6, the upper sealing cylinder 11 is sleeved outside the upper electrode 10, and the upper end of the upper sealing cylinder 11 is connected to the sliding sleeve 5 by threads; a limiting step 601 for limiting the sliding sleeve 5 is provided at the lower part of the electrode mounting post 6, correspondingly, a compression spring 23 is sleeved on the electrode mounting post 6, and the lower end of the compression spring 23 abuts against the upper end of the sliding sleeve 5; the bottom plate 12 is provided on the working table of the frame 1, the lower base 13 is provided on the bottom plate 12, a lower annular platform 1401 is provided at the lower end of the lower die 14, the lower annular platform 1401 is matched with the upper groove of the lower base 13, and is pressed and fixed on the lower base 13 through the lower electrode 15 sleeved at the top end of the lower base 13; the lower electrode 15 and the lower base 13 are connected to each other by threads; the lower sealing cylinder 16 is sleeved outside the lower electrode 15 and is connected to the lower base 13 by threads; the lower sealing cylinder 16 and the upper sealing cylinder 11 can form a seal after being matched.

[0025] The air exchange device includes a vacuum extraction pipe 17, a protective gas filling pipe 18, a vacuum device, and a protective gas filling device. The vacuum device and the protective gas filling device are respectively connected to the vacuum extraction pipe 17 and the protective gas filling pipe 18; the vacuum extraction pipe 17 and the protective gas filling pipe 18 are connected to the air hole 1301 on the lower base 13 through a tee structure; solenoid valves are provided on both the vacuum extraction pipe 17 and the protective gas filling pipe 18.

[0026] The electrical device includes a welding transformer 19; two poles on the output side of the welding transformer 19 are respectively connected to the upper electrode 10 and the lower electrode 15.

[0027] The frame is provided with guide posts 8 in pairs, and the electrode mounting posts 6 are provided with sliding plates 7, which are slidably connected to the guide posts 8 via sliding bearings 20. The guide posts 8 can ensure precise guidance during movement, ensuring that the upper part of the welding device can move linearly up and down, avoiding deviation or shaking, and effectively improving the reliability of the equipment.

[0028] The electrode mounting column 6 is provided with a water cooling system 25. The water cooling system 25 includes a water cooling chamber 2501 located within the electrode mounting column 6, and a cooling water inlet pipe joint 2502 and a cooling water outlet pipe joint 2503 located on the side of the electrode mounting column 6. The cooling water inlet pipe joint 2502 and the cooling water outlet pipe joint 2503 are mounted on the top of the electrode mounting column 6. The outlet of the cooling water inlet pipe joint 2502 is connected to a drainage pipe 2504, which extends to the bottom of the water cooling chamber 2501. For ease of implementation, the cooling water inlet pipe joint 2502 is threadedly connected to the upper end of the water cooling chamber 2501. This allows cooling water to be introduced after sealing and welding for rapid cooling, which improves work efficiency, prevents equipment damage due to excessive temperatures, and extends the service life of the equipment.

[0029] The center of the lower base 13 is provided with a clearance hole for the ejection column 21 to move. The bottom plate 12 is provided with a cylinder 22. The top of the cylinder 22 is sealed with the lower base 13, and its piston rod 2201 is fixedly connected to the ejection column 21. Through the design of the ejection structure, the workpiece can be ejected after the sealing welding is completed, and the workpiece can be easily removed.

[0030] The upper end of the lower sealing cylinder 16 is provided with a sealing ring installation groove 1601, and a sealing ring is installed in the sealing ring installation groove 1601. The sealing ring installed on the lower sealing cylinder 16 can completely seal between the upper sealing cylinder 11 and the lower sealing cylinder 16, thereby improving the purity of the protective gas inside the device after sealing and welding, thereby improving the quality of the finished electronic device.

[0031] Sealing rings are provided between the upper sealing cylinder 11 and the sliding sleeve 5 and between the lower sealing cylinder 16 and the lower base 13. The design of the sealing rings can further ensure the sealing performance.

[0032] The working process of the sealing welding machine of the present invention is as follows:

[0033] Stack workpiece one 24 and workpiece two 26 on the lower die 14. The lifting cylinder 2 controls the electrode mounting post 6 to move downward, so that the upper sealing cylinder 11 is docked with the lower sealing cylinder 16 to form a sealed cavity. The vacuum device starts to operate to evacuate the sealed cavity, and then the protective gas filling device fills the sealed cylinder with protective gas (at this time, workpiece one 24 and workpiece two 26 are not pressed tightly, and there is a gap between workpiece one 24 and workpiece two 26). After filling with protective gas, the lifting cylinder 2 controls the electrode mounting post 6 to continue to press down, so that workpiece one 24 and workpiece two 26 are pressed tightly. Then, the welding transformer 19 releases a pulsed voltage to the upper electrode 10 and the lower electrode 15, thereby generating a current, causing the rib 2401 on workpiece one 24 to heat up and melt (the current does work to generate heat), thus completing the sealed welding. After welding is completed, the water cooling system 25 starts to operate. After cooling, the lifting cylinder 2 controls the electrode mounting post 6 to reset upward, and the ejector post 21 ejects the welded workpiece.

[0034] The above general description of the utility model involved in the present application and the description of its specific implementation should not be understood as a limitation on the technical solution of the utility model. Those skilled in the art can, based on the disclosure of the present application, without departing from the constituent elements of the utility model involved, add, subtract, or combine the disclosed technical features in the above general description or / and specific implementation (including embodiments) to form other technical solutions that fall within the protection scope of the present application.

Claims

1. A voltage pulse seam welder that fills with a protective gas after evacuation, characterized in that: It includes a frame, as well as a lifting device, a welding device, a ventilation device, and an electrical device provided on the frame; The lifting device includes a lifting cylinder (2) and an electrode mounting column (6) that can be driven by the lifting cylinder; an installation plate (3) is provided on the upper part of the frame, the lifting cylinder (2) is installed on the installation plate (3), and the lifting cylinder (2) is connected to the electrode mounting column (6) through a connecting shaft (4); The welding device includes a matching upper electrode assembly and a lower electrode assembly; the upper electrode assembly includes a sliding sleeve (5), an upper die (9), an upper electrode (10), and an upper sealing cylinder (11); the lower electrode assembly includes a bottom plate (12), a lower base (13), a lower die (14), a lower electrode (15), and a lower sealing cylinder (16); an upper annular platform (901) is provided at the upper end of the upper die (9), the upper annular platform (901) is matched with the groove at the bottom end of the electrode mounting column (6), and the upper electrode (10) sleeved on the bottom end of the electrode mounting column (6) is pressed and fixed on the electrode mounting column (6); the sliding sleeve (5) is sleeved outside the electrode mounting column (6), the upper sealing cylinder (11) is sleeved outside the upper electrode (10), and the upper end of the upper sealing cylinder (11) is fixedly connected to the sliding sleeve (5); a limiting step (601) for limiting the sliding sleeve (5) is provided at the lower part of the electrode mounting column (6), correspondingly, a compression spring (23) is sleeved on the electrode mounting column (6), and the lower end of the compression spring (23) abuts against the upper end of the sliding sleeve (5); the bottom plate (12) is provided on the workbench of the frame (1), the lower base (13) is provided on the bottom plate (12), a lower annular platform (1401) is provided at the lower end of the lower die (14), the lower annular platform (1401) is matched with the groove at the upper end of the lower base (13), and the lower electrode (15) sleeved on the top end of the lower base (13) is pressed and fixed on the lower base (13); the lower sealing cylinder (16) is sleeved outside the lower electrode (15) and is fixedly connected to the lower base (13); a seal can be formed after the lower sealing cylinder (16) and the upper sealing cylinder (11) are matched; The ventilation device includes a vacuum extraction pipe (17), a protective gas filling pipe (18), a vacuum device, and a protective gas filling device, and the vacuum device and the protective gas filling device are respectively connected to the vacuum extraction pipe (17) and the protective gas filling pipe (18); the vacuum extraction pipe (17) and the protective gas filling pipe (18) are connected to the air holes (1301) on the lower base (13) through a three-way structure; electromagnetic valves are provided on both the vacuum extraction pipe (17) and the protective gas filling pipe (18); The electrical device includes a welding transformer (19); the two poles on the output side of the welding transformer (19) are respectively connected to the upper electrode (10) and the lower electrode (15).

2. The voltage pulse sealing machine that fills protective gas after vacuum pumping according to claim 1, wherein: Guide columns (8) are provided in pairs on the frame, a sliding plate (7) is provided on the electrode mounting column (6), and the sliding plate (7) is slidably connected to the guide columns (8) through sliding bearings (20).

3. The voltage pulse sealing machine that evacuates and then fills with a protective gas according to claim 1, characterized in that: The electrode mounting column (6) is provided with a water cooling system (25); the water cooling system (25) comprises a water cooling chamber (2501) provided inside the electrode mounting column (6), and a cooling water inlet pipe joint (2502) and a cooling water outlet pipe joint (2503) provided on the side of the electrode mounting column (6).

4. The voltage pulse sealing machine that fills with a protective gas after vacuum pumping according to claim 3, wherein: The cooling water inlet pipe joint (2502) and the cooling water outlet pipe joint (2503) are installed on the top of the electrode mounting column (6); the outlet of the cooling water inlet pipe joint (2502) is connected to a drainage pipe (2504), and the drainage pipe (2504) extends to the bottom of the water cooling chamber (2501).

5. The voltage pulse sealing machine with protective gas filling after vacuum pumping according to claim 4, characterized in that: The cooling water inlet pipe joint (2502) is connected to the upper end of the water cooling chamber (2501) through threads.

6. The voltage pulse seam welder with evacuation and filling of protective gas according to claim 1, characterized in that: A clearance hole for the ejection column (21) is provided at the center of the lower base (13), and a cylinder (22) is provided in the bottom plate (12). The top of the cylinder (22) is sealedly connected to the lower base (13), and its piston rod (2201) is fixedly connected to the ejection column (21).

7. The voltage pulse sealing machine that fills protective gas after evacuation according to claim 1, characterized in that: The upper end surface of the lower sealing cylinder (16) is provided with a sealing ring installation groove (1601), and a sealing ring is provided in the sealing ring installation groove (1601).

8. The voltage pulse sealing machine that fills protective gas after vacuum pumping according to claim 1, characterized in that: The upper electrode (10) and the electrode mounting column (6) are connected to each other via threads; and the lower electrode (15) and the lower base (13) are connected to each other via threads.

9. The voltage pulse sealing machine that fills protective gas after vacuum pumping according to claim 1, characterized in that: The upper end of the upper sealing cylinder (11) and the sliding sleeve (5) are connected to each other via threads; and the lower sealing cylinder (16) and the lower base (13) are connected to each other via threads.

10. The voltage pulse sealing machine that fills protective gas after vacuum pumping according to claim 9, characterized in that: Sealing rings are provided between the upper sealing cylinder (11) and the sliding sleeve (5), and between the lower sealing cylinder (16) and the lower base (13).

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