Automatic welding device for electronic cigarette

Abstract

The invention discloses an electronic cigarette automatic welding device which comprises a welding table, a laser generator, a focusing tube and a supporting table plate fixedly mounted on one side of the welding table, mounting frames are arranged on the two sides of the upper end of the focusing tube, and the mounting frames are fixedly mounted on the supporting table plate. Circuit data are monitored in real time through a power supply monitor, when a protective layer on the surface of a heating wire is thick and resistance is large, the voltage of current passing through an electromagnet is low, magnetorheological fluid flows slowly under the action of shear stress, a multistage electric push rod continuously pushes a piston piece to enable a pressing pipe to stretch out, and meanwhile the power supply monitor feeds back the data to a laser generator. And on the contrary, when the protective layer is thin and the resistance is small, the shear stress of the magnetorheological fluid is large, the multi-stage electric push rod stops pushing, the power supply monitor feeds back data, the laser generator reduces the power, and over-welding is prevented, so that the stable welding quality is ensured, and the reliability and the stability of welding of the heating wire and the electronic cigarette end are improved.

Description

Technical Field

[0001] The invention relates to the field of welding equipment, in particular to an automatic welding device for electronic cigarettes. Background Art

[0002] The electronic cigarette automatic welding device is mainly used for the welding of heating wires in the manufacturing process of electronic cigarettes. It can weld the heating wires of electronic cigarettes with components such as electrodes. In the structure of electronic cigarettes, the heating wire is one of the core components, and its function is to generate heat after power is turned on to atomize the smoke oil. The automatic welding device can ensure that the heating wire is welded with the corresponding electrode. The battery is used to power the resistance wire to heat up, and then the smoke oil and its dissolved substances around the resistance wire are volatilized. When the user inhales, the electronic cigarette starts, and the heating wire starts to work, converting the smoke oil into smoke that can be inhaled.

[0003] Since the electronic cigarette heating wire itself is easily oxidized, a protective layer (such as wax or oil and other antioxidants) is usually coated on its surface to prevent oxidation when the heating wire is stored before welding. When the protective layer condenses on the heating wire, the heating wire has uneven shapes and uneven heat dissipation temperatures, resulting in different thicknesses of the protective layer. This protective layer material will cause the laser to scatter during laser welding, resulting in uneven laser energy distribution when the laser is welding the heating wire. Therefore, the protective layer needs to be melted before laser welding the heating wire. However, in the process of welding by controlling fixed energy values ​​and focal lengths, existing laser welding machines find it difficult to adapt to changes in the thickness of the protective layer, which in turn leads to unstable welding quality, prone to cold welds, and insufficient weld strength. If the laser energy is increased to avoid cold welds, the protective layer will be heated and melted after the laser power is increased, which will cause the increased power laser to easily cause the heating wire to melt or over-weld, thereby affecting the welding quality or service life of the electronic cigarette heating wire.

[0004] To this end, an electronic cigarette automatic welding device is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an electronic cigarette automatic welding device to solve the problem raised in the above background technology that the existing laser welding machine realizes welding by controlling a fixed energy value and focal length, which is difficult to adapt to the change of the thickness of the protective layer, thereby causing unstable welding quality and prone to cold welding. The protective layer melts after laser heating. At this time, increasing the power of the laser will easily cause the heating wire to melt or over-weld.

[0006] To achieve the above object, the present invention provides the following technical solutions: An automatic welding device for electronic cigarettes, comprising a welding table, a laser generator, a focusing tube, and a support table plate fixedly installed on one side of the welding table. Mounting brackets are provided on both sides of the upper end of the focusing tube, and the mounting brackets are fixedly installed on the support table plate. Fixed tubes are fixedly installed by fitting on one side of each mounting bracket. Power monitors for real-time sampling and measurement of parameters such as voltage and current of power input and output are fixedly installed at the upper ends of the fixed tubes. Cable wires are fixedly installed on the power monitors, and the power monitors are teleconnected to the laser generator through the cable wires. Pressure tubes are movably installed by fitting at the lower ends of the fixed tubes, and positioning members are fixedly installed by fitting below the pressure tubes. Positioning rods for downward pressing and positioning are fixedly installed by fitting below the positioning members. Multi-stage electric push rods are fixedly installed above the interior of each fixed tube, and the multi-stage electric push rods are located below the mounting brackets inside the fixed tubes. Piston sheets are fixedly installed below the multi-stage electric push rods. A sleeve filled with magnetorheological fluid is fixedly connected by fitting inside the fixed tube, and the piston sheet and the pressure tube are respectively arranged at the upper and lower ends inside the sleeve and are movably connected by fitting with it. An electromagnet is nested and installed on the outer side of the middle of the sleeve.

[0007] In the above solution, preferably: A support rod for support is fixedly installed below the laser generator and is fixed on the welding table. A side door is movably installed by fitting below the welding table. A transparent baffle is fixedly installed on one side of the support table plate.

[0008] In the above solution, preferably: An air tank is fixedly placed inside the welding table, and a cross valve is connected through the upper part of the air tank. A guide pipe is connected through the upper part of the cross valve, and the guide pipe is connected through to a positioning table arranged on the welding table.

[0009] In the above solution, preferably: Guide plates for guiding are arranged in an equidistant and circumferential manner on the inner side of the positioning table and are inclined. Air outlet grooves are provided on the positioning table below the guide plates. A fixed table is fixedly installed at the center of the inner side of the positioning table, and an air extraction pump is fixedly installed below the fixed table. A fixing member is movably installed by fitting on the inner side of the fixed table, and a first spring member connected to the air extraction pump is fixedly installed below the fixing member.

[0010] In the above solution, preferably: The air extraction port provided above the air extraction pump is located directly below the fixing member, and the exhaust pipe provided on one side of the air extraction pump is connected through to one side of the cross valve.

[0011] In the above solution, preferably: A second spring member is fixedly installed on one side inside the cross valve, and the other end of the second spring member is movably installed by fitting with a piston valve inside the air tank. A triangular air guide groove is provided through the middle of the piston valve. An exhaust port for exhausting air is provided below one side of the piston valve, and the exhaust port penetrates through the bottom of the cross valve.

[0012] In the above solution, preferably: an electronic cigarette head for welding a carrier is fitted and installed on the fixing member, and a heating wire to be welded is fitted and installed inside the upper part of the electronic cigarette head.

[0013] In the above solution, preferably: a collimator tube for shaping and collimating the laser beam generated by the laser generator is fixedly installed on one side of the laser generator, a reflection cavity for adjusting the laser angle is fixedly installed on one side of the collimator tube, and a focusing tube is arranged below the reflection cavity. Water cooling mechanisms for heat dissipation and temperature reduction are provided on the collimator tube, the reflection cavity and the focusing tube.

[0014] The present invention provides an automatic electronic cigarette welding device, which has the following technical points and beneficial effects:

[0015] 1. By designing devices such as a power monitor, a multi-stage electric push rod and a sleeve tube inside the fixed tube, the present invention can monitor circuit data in real time through the power monitor. When the surface protective layer of the heating wire is thick and the resistance is large, the voltage passing through the electromagnet is low, the magnetorheological fluid flows slowly under the action of shear stress, the multi-stage electric push rod continuously pushes the piston piece, so that the pressing tube extends out. At the same time, the power monitor feeds back the data to the laser generator to increase the laser output power and avoid virtual soldering. On the contrary, when the protective layer is thin and the resistance is small, the shear stress of the magnetorheological fluid is large, the multi-stage electric push rod stops pushing, the power monitor feeds back the data, and the laser generator reduces the power to prevent over-soldering, thereby ensuring stable welding quality and improving the reliability and stability of the welding between the heating wire and the electronic cigarette head.

[0016] 2. By designing devices such as a pressing tube, a positioning member and a positioning rod, the present invention can drive the pressing tube, the positioning member and the positioning rod to act by pushing the piston piece to move in the sleeve tube through the multi-stage electric push rod, press the heating wire down to fit on the electronic cigarette head for positioning. The positioning rod and the heating wire form an electric current path, and the heating wire is energized to generate heat to melt the surface protective layer, which is not only convenient for subsequent welding but also plays a preheating role. During the positioning process, according to the change of the characteristics of the magnetorheological fluid, the pressing degree can be adjusted according to the resistance of the heating wire, reducing the displacement during the welding process and controlling the use of gas volume.

[0017] 3. The present invention designs devices such as a welding table, a cross valve, and an air extraction pump. The protective gas in the gas tank enters the positioning table through the cross valve and the air guide pipe. The inclined guide plate deflects and fills the gas in a circular manner, isolating oxygen to prevent oxidation of the welding area. When the heating wire protective layer is thick and the laser welding power is high, the gas volume discharged by the exhaust pipe decreases, the compression distance of the second spring member is short, and the air guide groove opening of the piston valve is large, increasing the flow rate of the protective gas. Conversely, when the gas volume is large, the compression distance of the second spring member is long, and the opening of the air guide groove decreases, reducing the flow rate and consumption. At the same time, the air extraction pump operates to form a gas cycle, discharging waste gas and maintaining the stability of the protective gas quality, providing a good environment for welding and improving the quality and corrosion resistance of the welded joint.

[0018] 4. The present invention designs devices such as a positioning rod, a pressure pipe, and a multi-stage electric push rod. Since the positioning rod is in contact with the surface of the heating wire, the melted protective layer on the heating wire re-solidifies under the gas diversion and cooling of the guide plate in the fitting gap between the positioning rod and the heating wire. When the multi-stage electric push rod contracts and the pressure pipe lifts the positioning rod and the heating wire to separate them, the solidified protective layer adheres to both of them. When the positioning rod is lifted, the adhesive force of the protective layer slightly pulls the welded heating wire when separating it from the heating wire to conduct a tensile test to detect the welding quality. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the welding table in the present invention.

[0021] Figure 3 It is a schematic diagram of the connection structure between the focusing tube and the positioning table in the present invention.

[0022] Figure 4 It is a schematic diagram of the partial structure of the water cooling mechanism in the present invention.

[0023] Figure 5 It is a schematic diagram of the internal structure disassembly of the fixed tube in the present invention.

[0024] Figure 6 It is a schematic diagram of the partial structure section of the fixed tube in the present invention.

[0025] Figure 7 It is a schematic diagram of the connection structure between the positioning table and the air guide pipe in the present invention.

[0026] Figure 8 It is a schematic diagram of the disassembly structure between the electronic cigarette head and the fixing member in the present invention.

[0027] Figure 9 It is a schematic diagram of the partial structure section of the positioning table and the cross valve in the present invention.

[0028] Figure 10 This is a partial structural schematic diagram of the fixing member and the fixing table in the present invention.

[0029] Figure 11 This is a split structural schematic diagram of the piston valve and the cross valve in the present invention.

[0030] In the figure: 1, welding table; 101, support rod; 102, support table board; 103, baffle; 104, side door; 2, laser generator; 201, collimator tube; 202, reflection cavity; 203, focusing tube; 3, mounting bracket; 4, fixing tube; 401, power monitor; 402, cable; 403, pressure tube; 404, multi-stage electric push rod; 405, piston piece; 406, electromagnet; 407, sleeve; 5, positioning table; 501, guide plate; 502, fixing table; 503, fixing member; 504, first spring member; 6, water cooling mechanism; 7, gas tank; 701, cross valve; 702, air guide pipe; 703, second spring member; 704, piston valve; 705, air guide groove; 706, exhaust port; 8, air extraction pump; 801, air extraction port; 802, exhaust pipe; 9, positioning member; 10, positioning rod; 11, electronic cigarette head; 12, heating wire. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 to 11 , the present invention provides a technical solution for an automatic welding device for electronic cigarettes: An automatic welding device for electronic cigarettes includes a welding table 1, a laser generator 2 and a focusing tube 203, and a support table board 102 fixedly installed on one side of the welding table 1. Mounting brackets 3 are provided on both sides of the upper end of the focusing tube 203, and the mounting brackets 3 are fixedly installed on the support table board 102. Fixing tubes 4 are fixedly installed by fitting on one side of each mounting bracket 3. Power monitors 401 for real-time sampling and measurement of parameters such as voltage and current of power input and output are fixedly installed at the upper ends of the fixing tubes 4. Cable lines 402 are fixedly installed on the power monitors 401, and the power monitors 401 are in telecommunication connection with the laser generator 2 through the cable lines 402. Pressure tubes 403 are movably installed by fitting at the lower ends of the fixing tubes 4, and positioning members 9 are fixedly installed by fitting below the pressure tubes 403. Positioning rods 10 for downward pressing and positioning are fixedly installed by fitting below the positioning members 9; Above the interior of the fixed tube 4, multi-stage electric push rods 404 are fixedly installed, and the multi-stage electric push rods 404 are located below the mounting frame 3 inside the fixed tube 4. Below the multi-stage electric push rods 404, piston sheets 405 are fixedly installed. Inside the fixed tube 4, a sleeve 407 filled with magnetorheological fluid is fixedly connected in an embedded manner, and the piston sheet 405 and the pressure tube 403 are respectively located at the upper and lower ends inside the sleeve 407 and are arranged in an embedded and movable connection therewith. An electromagnet 406 is nested and installed on the outer side of the middle of the sleeve 407; As an embodiment of the present invention, as Figures 1 to 7 shown, a support rod 101 for support is fixedly installed below the laser generator 2 and fixed to the welding table 1, and a side door 104 is embedded and movably installed below the welding table 1. A transparent baffle 103 is fixedly installed on one side of the support platform plate 102; During operation, the laser generator 2 is supported and installed by the support rod 101 on the welding table 1, and the mounting frame 3 is installed and used by the support platform plate 102. Secondly, the transparent baffle 103 is used to facilitate observing the welding process during welding. At the same time, the side door 104 is used to open the lower part of the welding table 1 to perform equipment maintenance and replacement on the internal gas tank 7 and cross valve 701. When the heating wire 12 is welded to the electronic cigarette head 11, the power monitor 401 on the fixed tube 4 operates to supply power to the multi-stage electric push rod 404, so that the multi-stage electric push rod 404 operates to push the piston sheet 405 to move downward in the sleeve 407 filled with magnetorheological fluid. Then, the magnetorheological fluid is used to push the pressure tube 403 inside the sleeve 407 to move downward, so that the positioning member 9 and the positioning rod 10 on the pressure tube 403 press down the heating wire 12 to fit on the electronic cigarette head 11 for downward positioning. When the two positioning rods 10 press down and position the heating wire 12 to fit, at this time, the multi-stage electric push rod 404 supplies power to the electromagnet 406 and the positioning rod 10. The electromagnet 406 forms a current path after the current passes through the two positioning rods 10 and the heating wire 12. Then, the electromagnet 406 generates a magnetic field and acts on the magnetorheological fluid to change its viscosity. When the two positioning rods 10 form a current path with the heating wire 12, the heating wire 12 is energized to generate heat, and then the protective layer on its surface is heated and melted to melt the protective layer before laser welding the heating wire; When the surface protective layer of the heating wire 12 is relatively thick, the resistance is relatively large. At this time, the current passing through the electromagnet 406 in the current path has a relatively low voltage, making the magnetic force of the two electromagnets 406 relatively weak. The magnetorheological fluid in the sleeve 407 flows relatively slowly through the center of the sleeve 407 under the action of shear stress. As a result, the multi-stage electric push rod 404 continuously pushes the piston piece 405 downward, causing the pressure tube 403 to extend out of the sleeve 407. At the same time, when the two power monitors 401 on the fixed tube 4 forming the current path detect that the protective layer is thick and the resistance is large, they feedback the circuit data measured by the power monitor 401 to the laser generator 2 through the cable 402, so that the laser generator 2 increases the output power of the laser according to the feedback data to ensure that the laser power required for welding can pass through the protective layer to weld and combine the heating wire 12 and the electronic cigarette head 11, thereby avoiding the situation of false soldering. When the surface protective layer of the heating wire 12 is relatively thin, vice versa. As a result, the shear stress of the magnetorheological fluid in the sleeve 407 is relatively large, causing it to remain relatively stationary in the sleeve 407 and unable to flow through the center of the sleeve 407. At this time, the multi-stage electric push rod 404 stops pushing the piston piece 405. When the pressure tube 403 fits with the positioning rod 10, it keeps the relative position of the pressure tube 403 in the sleeve 407 unchanged. At the same time, when the two power monitors 401 on the fixed tube 4 forming the current path detect that the protective layer is thick and the resistance is small, they feedback the data detected by the power monitor 401 to the laser generator 2 through the cable 402 to adjust the laser output power and avoid the situation of over-soldering of the heating wire 12 caused by excessive laser power. When the laser welding of the heating wire 12 is completed, since the positioning rod 10 is in contact with the surface of the heating wire 12, the melted protective layer on the heating wire 12 re-solidifies under the gas diversion cooling of the guide plate 501 in the fitting gap with the positioning rod 10. When the multi-stage electric push rod 404 contracts to lift and separate the positioning rod 10 and the heating wire 12 by the pressure tube 403, the solidified protective layer adheres them together. When the positioning rod 10 is lifted, the adhesive force of the protective layer slightly pulls the welded heating wire 12 when separating it from the heating wire 12 to perform a slight tensile test to detect the welding quality.

[0033] As an embodiment of the present invention, as Figures 7 to 10 shown, the inner side of the positioning table 5 is equidistantly surrounded by inclined guide plates 501 for guiding, and air outlet grooves are provided on the positioning table 5 below the guide plates 501. A fixed table 502 is fixedly installed at the center of the inner side of the positioning table 5, and an air extraction pump 8 is fixedly installed below the fixed table 502. A fixing member 503 is fitted and movably installed inside the fixed table 502, and a first spring member 504 connected to the air extraction pump 8 is fixedly installed below the fixing member 503; The air extraction port 801 provided above the air extraction pump 8 is located directly below the fixing member 503, and the exhaust pipe 802 provided on one side of the air extraction pump 8 is connected in a penetrating manner to one side of the cross valve 701. An electronic cigarette head 11 for welding the carrier is fitted and installed on the fixing member 503, and a heating wire 12 to be welded is fitted and installed inside the upper part of the electronic cigarette head 11; During operation, the fixing member 503 and the air extraction pump 8 are installed and used through the fixing table 502. When in use, the electronic cigarette head 11 is placed in the fixing member 503 in a targeted manner, so as to perform positioning and support during the welding of the electronic cigarette head 11 and the heating wire 12. And through the first spring member 504 provided below the fixing member 503, the fixing member 503 can be limited and fitted to move in the fixing table 502 when the positioning rod 10 presses down the heating wire 12 for positioning. When the resistance of the heating wire 12 is large, the pressure tube 403 is slowly pushed down by the magnetorheological fluid, so that the positioning rod 10 presses the fixing member 503 into the fixing table 502. Since the fixing member 503 is equidistantly surrounded by notches for ventilation, when the fixing member 503 is pressed into the fixing table 502, the gas entering through the notches is reduced by the fitting of the fixing member 503 and the fixing table 502, so that the gas inhaled from the air extraction port 801 during the operation of the air extraction pump 8 is reduced, and at the same time, the gas volume discharged from the exhaust pipe 802 is reduced. When the resistance of the heating wire 12 is small, the pressure tube 403 stops pressing down under the shear stress of the magnetorheological fluid, thereby reducing the distance of pressing the fixing member 503 into the fixing table 502. At this time, the gas entering through the notches will relatively increase, and vice versa, thereby increasing the gas volume discharged from the exhaust pipe 802. Secondly, a protective gas such as nitrogen or argon is provided for the positioning table 5 during welding through the gas tank 7, the cross valve 701 and the air guide pipe 702. When the protective gas is blown out from the air outlet groove through the positioning table 5, the protective gas is guided by the inclined guide plate 501 to flow around and fill in the positioning table 5, so as to isolate the oxygen in the air in the positioning table 5 and prevent oxidation of the welding area.

[0034] As an embodiment of the present invention, as Figures 3 to 11 shown, an air tank 7 is fixedly placed inside the welding table 1, and a cross valve 701 is connected in a penetrating manner above the air tank 7. A gas guide pipe 702 is connected in a penetrating manner above the cross valve 701, and the gas guide pipe 702 is connected in a penetrating manner to a positioning table 5 provided on the welding table 1. A second spring member 703 is fixedly installed on one side inside the cross valve 701, and the other end of the second spring member 703 is connected to a piston valve 704 fitted and movably installed inside the air tank 7. A triangular air guide groove 705 is provided through the middle of the piston valve 704. An exhaust port 706 for exhausting gas is provided below one side of the piston valve 704, and the exhaust port 706 penetrates through the bottom of the cross valve 701; During operation, when the protective layer of the heating wire 12 is relatively thick, a higher power is required for laser welding, and the temperature will also increase accordingly. At the same time, the increase in temperature will increase the degree of oxidation reaction between the metal material and oxygen. When the gas volume discharged by the exhaust pipe 802 decreases, the gas volume entering the cross valve 701 through the gas is reduced and the air pressure is relatively low. As a result, the compression distance of the second spring member 703 is relatively short. At this time, the gas guiding groove 705 on the piston valve 704 has a relatively large opening position in the cross valve 701. Thus, the flow rate of the protective gas in the gas tank 7 passing through the gas guiding groove 705 is increased, thereby increasing the gas outlet volume of the protective gas passing through the gas outlet groove on the positioning table 5, so as to improve the isolation of oxygen in the welding area by the protective gas in the positioning table 5. When the gas volume discharged by the exhaust pipe 802 is relatively large, vice versa. At this time, the compression distance of the second spring member 703 is relatively long, the opening of the gas guiding groove 705 on the piston valve 704 is reduced, and the flow rate of the protective gas is decreased, but it is still sufficient to isolate the oxygen in the welding area when the laser welding power is relatively low, improving the welding quality and reducing the consumption of the protective gas. Secondly, the gas discharged by the exhaust pipe 802 is discharged to the outside through the exhaust port 706 of the cross valve 701, thereby enabling the circulation of the protective gas in the positioning table 5 through the gas to maintain the stable quality of the protective gas for use.

[0035] As an embodiment of the present invention, as Figures 1 to 4 shown, on one side of the laser generator 2, a collimator tube 201 for shaping and collimating the laser beam generated by the laser generator 2 is fixedly installed. On one side of the collimator tube 201, a reflection cavity 202 for adjusting the laser angle is fixedly installed, and the focusing tube 203 is arranged below the reflection cavity 202. The collimator tube 201, the reflection cavity 202, and the focusing tube 203 are all provided with a water cooling mechanism 6 for heat dissipation and temperature reduction; During operation, when the laser generator 2 operates, a laser beam is generated. The laser beam first enters the collimator tube 201, and the collimator tube 201 shapes and collimates the laser beam to make it a beam with higher parallelism and more uniform energy distribution. The laser beam after passing through the collimator tube 201 enters the reflection cavity 202. The reflection cavity 202 can adjust the angle of the laser beam to accurately focus it on the part to be welded. The laser beam with the adjusted angle enters the focusing tube 203, and the focusing tube 203 focuses the laser beam onto an extremely small light spot to increase the laser energy density, thereby realizing the welding of the heating wire 12. Secondly, the water cooling mechanism 6 continuously operates to take away the heat generated during the laser transmission and focusing processes through circulating water, preventing overheating from damaging the optical components.

[0036] Working principle: When the laser generator 2 is operating, it emits a laser beam. The laser beam processed by the collimator 201 then enters the reflection cavity 202 for angle adjustment. The adjusted laser beam then enters the focusing tube 203, and the focusing tube 203 focuses the laser beam onto an extremely small spot, thereby increasing the laser energy density to achieve precise welding of the heating wire 12. At the same time, the water cooling mechanism 6 continuously operates to remove the heat generated during laser transmission and focusing through circulating water, preventing overheating from damaging the optical components; When the heating wire 12 is welded to the electronic cigarette head 11, the power monitor 401 on the fixed tube 4 supplies power to the multi-stage electric push rod 404, causing it to operate and push the piston piece 405 to move downward within the sleeve 407 filled with magnetorheological fluid. Through the magnetorheological fluid, the pressure tube 403 operates downward, causing the positioning member 9 and the positioning rod 10 to press down the heating wire 12 against the electronic cigarette head 11 for positioning. After the positioning rod 10 presses down and positions the heating wire 12, the multi-stage electric push rod 404 supplies power to the electromagnet 406 and the positioning rod 10. After the current passes through the two positioning rods 10 and the heating wire 12, an electric current path is formed in the electromagnet 406, generating a magnetic field and acting on the magnetorheological fluid to change its viscosity. At the same time, the heating wire 12 is energized to generate heat, heating and melting the protective layer on its surface; If the protective layer on the surface of the heating wire 12 is thick and has a large resistance, the current voltage passing through the electromagnet 406 is low at this time, resulting in a weak magnetic force. The flow rate of the magnetorheological fluid through the center of the sleeve 407 under the action of shear stress is relatively slow, causing the multi-stage electric push rod 404 to continuously push the piston piece 405 downward, causing the pressure tube 403 to extend within the sleeve 407. At the same time, when the two power monitors 401 on the fixed tube 4 detect that the protective layer is thick and has a large resistance, they feedback the circuit data to the laser generator 2 through the cable 402. The laser generator 2 increases the laser output power according to the feedback data to ensure that the laser power required for welding can penetrate the protective layer to weld and combine the heating wire 12 with the electronic cigarette head 11, avoiding false welding. On the contrary, if the protective layer on the surface of the heating wire 12 is thin and the shear stress of the magnetorheological fluid is large, it remains relatively stationary within the sleeve 407 and cannot flow through the center of the sleeve 407. At this time, the multi-stage electric push rod 404 stops pushing the piston piece 405, and the pressure tube 403 maintains its relative position unchanged when the heating wire 12 is in contact with the positioning rod 10. When the power monitor 401 detects that the protective layer is thin and has a small resistance, it feedbacks the data to the laser generator 2 through the cable 402 to adjust the laser output power to avoid over-welding caused by excessive laser power. When the laser welding of the heating wire 12 is completed, when the multi-stage electric push rod 404 contracts to lift the pressure tube 403 to separate the positioning rod 10 from the heating wire 12, the solidified protective layer adheres the two together. When the positioning rod 10 is lifted, the adhesive force of the protective layer slightly pulls the welded heating wire 12 when separating it from the heating wire 12 to perform a slight tensile test to detect the welding quality; The fixing member 503 and the air extraction pump 8 are installed and used through the fixing platform 502. During use, the electronic cigarette head 11 is placed directionally in the fixing member 503 to position and support the electronic cigarette head 11 during the welding of the electronic cigarette head 11 and the heating wire 12. A first spring member 504 is provided below the fixing member 503, so that the fixing member 503 can be limited and fitted in the fixing platform 502 when the positioning rod 10 presses down and positions the heating wire 12. When the resistance of the heating wire 12 is large, the pressure tube 403 is slowly pushed down by the magnetorheological fluid, and then the positioning rod 10 presses the fixing member 503 into the fixing platform 502. When the fixing member 503 is pressed into the fixing platform 502, due to the fitting of the fixing member 503 and the fixing platform 502, the gas entering through the notch is reduced, so that the gas inhaled by the air extraction pump 8 from the air extraction port 801 during operation is reduced, and at the same time, the gas volume discharged from the exhaust pipe 802 is reduced. When the resistance of the heating wire 12 is small, the pressure tube 403 stops pressing down under the shear stress of the magnetorheological fluid, thereby reducing the distance of pressing the fixing member 503 into the fixing platform 502. At this time, the gas entering through the notch will relatively increase, and vice versa, thereby increasing the gas volume discharged from the exhaust pipe 802. Secondly, a protective gas such as nitrogen or argon is provided for the positioning platform 5 during welding through the gas tank 7, the cross valve 701 and the air guide pipe 702. When the protective gas is blown out from the air outlet groove through the positioning platform 5, the protective gas is guided by the inclined guide plate 501 to flow around and fill in the positioning platform 5, thereby isolating oxygen in the air in the positioning platform 5 and preventing oxidation of the welding area; When the gas volume discharged from the exhaust pipe 802 is reduced, the gas volume entering the cross valve 701 is reduced and the air pressure is low, so that the compression distance of the second spring member 703 is short. At this time, the air guide groove 705 on the piston valve 704 has a large opening position in the cross valve 701, thereby increasing the flow rate of the protective gas in the gas tank 7 passing through the air guide groove 705, so as to increase the air outlet volume of the protective gas passing through the air outlet groove on the positioning platform 5, so as to improve the isolation of oxygen in the welding area by the protective gas in the positioning platform 5 and improve the welding quality. When the gas volume discharged from the exhaust pipe 802 is large, vice versa. At this time, the compression distance of the second spring member 703 is long, the opening of the air guide groove 705 on the piston valve 704 is reduced, and the flow rate of the protective gas is reduced, but it is still sufficient to isolate oxygen in the welding area when the laser welding power is low, improve the welding quality, and at the same time reduce the consumption of the protective gas. Secondly, the gas discharged from the exhaust pipe 802 is discharged to the outside through the exhaust port 706 of the cross valve 701, so that the protective gas circulates through the gas in the positioning platform 5 to maintain the stable use of the protective gas quality.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for electronic cigarettes, comprising a welding table (1), a laser generator (2) and a focusing tube (203), and a support platform plate (102) fixedly installed on one side of the welding table (1), characterized in that: On both sides of the upper end of the focusing tube (203), there are mounting frames (3), and the mounting frames (3) are fixedly installed on the support platform plate (102). On one side of each mounting frame (3), there is a fixedly installed fixed tube (4). On the upper end of each fixed tube (4), there is a power monitor (401) for real-time sampling and measurement of parameters such as voltage and current of power input and output. On each power monitor (401), there is a fixedly installed cable (402), and the power monitor (401) is teleconnected to the laser generator (2) through the cable (402). At the lower end of each fixed tube (4), there is a movably installed pressure tube (403) in an embedded manner, and below each pressure tube (403), there is a fixedly installed positioning member (9) in an embedded manner. Below each positioning member (9), there is a fixedly installed positioning rod (10) for downward pressing and positioning; Above the interior of each fixed tube (4), there is a fixedly installed multi-stage electric push rod (404), and the multi-stage electric push rod (404) is located below the mounting frame (3) inside the fixed tube (4). Below each multi-stage electric push rod (404), there is a fixedly installed piston piece (405). Inside the fixed tube (4), there is a fixedly connected sleeve (407) filled with magnetorheological fluid, and the piston piece (405) and the pressure tube (403) are respectively located at the upper and lower ends inside the sleeve (407) and are movably connected to it in an embedded manner. An electromagnet (406) is nested and installed on the outer side of the middle of the sleeve (407).

2. The automatic soldering device for electronic cigarettes according to claim 1, wherein: Below the laser generator (2), there is a support rod (101) fixedly installed on the welding table (1) for support, and on the welding table (1), there is a side door (104) movably installed in an embedded manner. On one side of the support platform plate (102), there is a fixedly installed transparent baffle (103).

3. The automatic soldering device for electronic cigarettes according to claim 1, characterized in that: Inside the welding table (1), there is a gas tank (7) fixedly placed, and above the gas tank (7), there is a cross valve (701) connected in a through manner. Above the cross valve (701), there is a gas guide pipe (702) connected in a through manner, and the gas guide pipe (702) is connected in a through manner to a positioning table (5) arranged on the welding table (1).

4. The automatic soldering device for electronic cigarettes according to claim 3, characterized in that: Inside the positioning table (5), there are inclined guide plates (501) arranged at equal intervals for guiding the flow, and there are air outlet grooves on the positioning table (5) below the guide plates (501). In the center of the inside of the positioning table (5), there is a fixed table (502) fixedly installed, and below the fixed table (502), there is a suction pump (8) fixedly installed. Inside the fixed table (502), there is a fixedly installed fixing member (503) in an embedded and movable manner, and below the fixing member (503), there is a first spring member (504) connected to the suction pump (8).

5. The automatic soldering device for electronic cigarettes according to claim 4, wherein: The air extraction port (801) provided above the air extraction pump (8) is located directly below the fixing member (503), and the exhaust pipe (802) provided on one side of the air extraction pump (8) is connected in communication with one side of the cross valve (701).

6. The automatic soldering device for electronic cigarettes according to claim 3, wherein: On the inner side of one side of the cross valve (701), a second spring member (703) is fixedly installed, and the other end of the second spring member (703) is connected to a piston valve (704) that is fitted and movably installed inside the air tank (7). A triangular air guiding groove (705) is provided through the middle of the piston valve (704). An exhaust port (706) for exhausting air is provided below one side of the piston valve (704), and the exhaust port (706) penetrates through the bottom of the cross valve (701).

7. The automatic soldering device for electronic cigarettes according to claim 4, wherein: An electronic cigarette head (11) for welding a carrier is fitted and installed on the fixing member (503), and a heating wire (12) to be welded is fitted and installed on the inner side above the electronic cigarette head (11).

8. The automatic welding device for electronic cigarettes according to claim 1, characterized in that: On one side of the laser generator (2), a collimating tube (201) for shaping and collimating the laser beam generated by the laser generator (2) is fixedly installed. On one side of the collimating tube (201), a reflection cavity (202) for adjusting the laser angle is fixedly installed, and the focusing tube (203) is arranged below the reflection cavity (202). Water cooling mechanisms (6) for heat dissipation and temperature reduction are provided on the collimating tube (201), the reflection cavity (202), and the focusing tube (203).

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