A handheld welding machine

Abstract

The present invention discloses a handheld welding machine, which belongs to the technical field of welding machines, and comprises a laser welding main machine, a gas cylinder and a handheld welding gun; a laser is fixedly installed inside the laser welding main machine, and an optical fiber line is fixedly installed on the laser. The present invention blows out all-round protective gas to the welding part through a first annular opening, and can fully isolate the welding part with the help of the protective gas, thereby fully isolating the humid air and generating hot protective gas, collects the hot protective gas through the second annular opening, and blows the hot protective gas out again through the third annular opening to purge the welding part, thereby drying and cleaning the welding part, removing moisture and dirt on the surface of the parent material, and at the same time, can use the hot protective gas to dry the welding wire in real time, effectively avoid the presence of moisture on the surface of the parent material and the welding material to cause pore defects, improve welding quality, and make welding not restricted by the humid environment.

Description

Technical Field

[0001] The invention belongs to the technical field of welding machines, and in particular relates to a handheld welding machine. Background Art

[0002] As an efficient and precise metal connection technology, laser welding technology has gradually become a leader in welding technology with its characteristics of non-contact, high precision and high energy efficiency as the technology develops.

[0003] Laser welding is widely used, but the welding process is often accompanied by welding defects such as cracks, welding pores and spatter. In rainy and humid areas, the relative humidity of the air exceeds 90% for about 1 / 3 of the year. Due to the particularity of the welding environment, the relative humidity of the air is the main cause of pore defects, which is mainly manifested in the excessive absorption of moisture in the air by the welding material and the base material. As the welding process proceeds, this part of the moisture will enter the molten pool. Although shielding gas is used to isolate the air during welding, it is impossible to avoid the pore defects caused by the excessive absorption of moisture in the air by the welding material and the base material. The pore defects in the weld reduce the effective cross-sectional area of ​​the weld and reduce the load-bearing capacity of the weld. It will also cause stress concentration locally, which has a serious impact on the force-bearing capacity and service life of the welded components.

[0004] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a kind of handheld welding machine.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a handheld welding machine, which can solve the problem of excessive absorption of moisture in the air by welding material and base material due to high relative humidity of the air, resulting in porosity defects.

[0007] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0008] A handheld welding machine, comprising a laser welding host, a gas cylinder and a handheld welding gun;

[0009] A laser is fixedly installed inside the laser welding main machine, an optical fiber is fixedly installed on the laser, a wire reel and a wire feeder are installed on the laser welding main machine, welding wire is wound on the wire reel, and a wire guide tube is fixedly installed on the wire feeder;

[0010] The gas cylinder is mounted on the laser welding main machine, the gas cylinder stores protective gas inside, and a gas supply pipe is fixedly installed on the gas cylinder;

[0011] One end of the optical fiber away from the laser welding host is fixedly mounted on a handheld welding gun, and a copper nozzle and a wire guide nozzle are respectively fixedly mounted on the handheld welding gun;

[0012] An external disk is fixedly mounted on one end of the handheld welding gun close to the copper nozzle, the copper nozzle is located on the central axis of the external disk, a first cavity, a second cavity and a third cavity are sequentially arranged inside the external disk, and a third annular opening, a second annular opening and a first annular opening are respectively opened on one side of the first cavity, the second cavity and the third cavity close to the copper nozzle;

[0013] One end of the gas supply pipe away from the gas cylinder is fixedly mounted on the external plate and communicated with the interior of the third cavity;

[0014] One end of the wire guide tube away from the wire feeder is fixedly mounted on the external disk, the wire guide tube matches the wire guide nozzle, and the welding wire passes through the wire feeder, the wire guide tube and the second cavity in sequence before entering the wire guide nozzle;

[0015] An exhaust mechanism is fixedly mounted on the handheld welding gun, an air inlet end of the exhaust mechanism is communicated with the interior of the second cavity, and an air outlet end of the exhaust mechanism is communicated with the interior of the first cavity.

[0016] In one or more embodiments of the present invention, the first annular opening and the second annular opening are both inclined toward the central axis of the outer attached disk, the inclination angle of the first annular opening is greater than the inclination angle of the second annular opening, and the third annular opening is inclined toward the edge of the outer attached disk.

[0017] In one or more embodiments of the present invention, the second cavity and the third cavity are separated by a metal heat-conducting ring.

[0018] In one or more embodiments of the present invention, the exhaust mechanism includes an air pump, which is fixedly mounted on a handheld welding gun. An exhaust pipe and an injection pipe are fixedly mounted on the input and output ends of the air pump, respectively. One end of the exhaust pipe is connected to the interior of the second cavity, and one end of the injection pipe is connected to the interior of the first cavity.

[0019] In one or more embodiments of the present invention, an intermediate seat is fixedly installed on the handheld welding gun, an inner groove is arranged inside the intermediate seat, and a primary filter screen, an activated carbon filter element and a secondary filter screen are fixedly installed in sequence inside the inner groove;

[0020] The air injection pipe and the air extraction pipe both pass through the middle seat, and the air extraction pipe is communicated with the interior of the inner tank.

[0021] In one or more embodiments of the present invention, a ferrule is rotatably mounted on the outer side of the external disk, a first hollow rod is rotatably mounted on the ferrule, and a first external extension air port is formed on one end surface of the first hollow rod close to the copper nozzle;

[0022] A first air distribution pipe is fixedly mounted on the first hollow rod, and one end of the first air distribution pipe away from the first hollow rod is connected to the interior of the first cavity.

[0023] In one or more embodiments of the present invention, a second hollow rod is rotatably mounted on the ferrule, the second hollow rod is located on the opposite side of the first hollow rod, and a second extension air port is provided on an end surface of the second hollow rod close to the copper nozzle;

[0024] A plurality of spoiler components are installed inside the second extension air port;

[0025] A second air distribution pipe is fixedly mounted on the second hollow rod, and one end of the second air distribution pipe away from the second hollow rod is in communication with the interior of the first cavity.

[0026] In one or more embodiments of the present invention, the spoiler assembly includes a support shaft and a plurality of spoiler plates. The support shaft is rotatably mounted inside the second extension air port, and the plurality of spoiler plates are fixedly mounted on the support shaft.

[0027] In one or more embodiments of the present invention, a first protective shell is rotatably mounted on one end of the first hollow rod away from the outer attached disk, and a second protective shell is mounted on one end of the second hollow rod away from the outer attached disk;

[0028] The first protective shell and the second protective shell are both matched with the copper nozzle.

[0029] In one or more embodiments of the present invention, a screw hole is formed on the ferrule, and a fastening bolt is screwed into the screw hole.

[0030] Compared with the prior art, the present invention blows out all-round protective gas to the welding part through the first annular opening, and can fully isolate the welding part with the help of the protective gas, thereby fully isolating the humid air and generating hot protective gas, and collects the hot protective gas through the second annular opening, so that the hot protective gas is blown out again through the third annular opening to purge the welding part, thereby achieving drying and cleaning of the welding part, removing moisture and dirt on the surface of the parent material, and at the same time, can use the hot protective gas to dry the welding wire in real time, effectively avoiding the presence of moisture on the surface of the parent material and the welding material to cause pore defects, improving the welding quality, and making the welding not restricted by the humid environment;

[0031] In addition, while extracting the hot shielding gas, harmful gases generated by welding can also be collected to prevent the harmful gases from spreading outward, thereby protecting the environment and the physical and mental health of workers. At the same time, the hot shielding gas blown out again from the third annular opening can hinder the splashing of sparks during welding, prevent burns, and improve the safety of the handheld welding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 This is a structural diagram of a handheld welding machine in one embodiment of the present invention;

[0034] Figure 2 A structural diagram of a handheld welding gun of a handheld welding machine in one embodiment of the present invention;

[0035] Figure 3 A front view of a handheld welding gun of a handheld welding machine in one embodiment of the present invention;

[0036] Figure 4 This is a structural diagram of a first use state of an external attached plate of a handheld welding machine in one embodiment of the present invention;

[0037] Figure 5 This is a structural diagram of a second use state of an external attached plate of a handheld welding machine in one embodiment of the present invention;

[0038] Figure 6 A cross-sectional view of an external plate of a handheld welding machine in one embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the working of an external plate of a handheld welding machine in one embodiment of the present invention;

[0040] Figure 8 A handheld welding machine according to an embodiment of the present invention Figure 6 Enlarged view of point A in the middle;

[0041] Fig. 9 It is a top cross-sectional schematic diagram of a second support rod of a handheld welding machine in one embodiment of the present invention;

[0042] Fig.10 It is a structural diagram of a spoiler assembly of a handheld welding machine in one embodiment of the present invention;

[0043] Fig.11The figure is a schematic structural diagram of an intermediate base of a handheld welding machine according to an embodiment of the present invention.

[0044] Description of main reference numerals:

[0045] 10. Laser welding host; 11. Wire reel; 12. Wire feeder; 13. Wire guide tube; 14. Optical fiber line; 20. Gas cylinder; 21. Gas supply pipe; 211. Control valve; 30. Handheld welding gun; 31. Copper nozzle; 32. Wire guide nozzle; 33. Switch button; 40. External disk; 41. Ferrule; 411. Screw hole; 42. Fastening bolt; 43. First annular opening; 44. Second annular opening; 45. Third annular opening; 46. First cavity; 47. Second cavity; 4 8. The third cavity; 50. The first hollow rod; 51. The first air distribution pipe; 52. The first extended air port; 53. The first protective shell; 60. The second hollow rod; 61. The second air distribution pipe; 62. The second extended air port; 63. The spoiler assembly; 631. The support shaft; 632. The spoiler; 64. The second protective shell; 70. The middle seat; 71. The primary filter; 72. The activated carbon filter element; 73. The secondary filter; 74. The inner tank; 80. The air pump; 81. The air injection pipe; 82. The air extraction pipe. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0047] like Figure 1-Figure 11 As shown, a handheld welding machine in one embodiment of the present invention includes a laser welding host 10 and a handheld welding gun 30. A plurality of universal wheels are installed below the laser welding host 10 to facilitate the transportation and transfer of the welding machine. A touch screen is provided on the laser welding host 10 to control the use of the welding machine. A laser is fixedly installed inside the laser welding host 10, and an optical fiber line 14 is fixedly installed on the laser. One end of the optical fiber line 14 away from the laser welding host 10 is fixedly installed on the handheld welding gun 30, and a copper nozzle 31 is fixedly installed at one end of the handheld welding gun 30. The laser generated by the laser can be transmitted to the handheld welding gun 30 through the optical fiber line 14, and finally emitted through the copper nozzle 31 to achieve laser welding.

[0048] like Figure 3 As shown, a switch button 33 is provided on the handheld welding gun 30 , and the switch button 33 serves as a switch of the handheld welding gun 30 , so that the construction personnel can control the use of the handheld welding gun 30 through the switch button 33 .

[0049] like Figure 1 As shown, a wire reel 11 is rotatably mounted on the side of the laser welding main machine 10, and welding wire is wound on the wire reel 11. A wire feeder 12 is arranged on one side of the wire reel 11, and the wire feeder 12 can deliver welding wire by driving a wire feeding wheel through a motor. A wire guide tube 13 is fixedly mounted on one side of the wire feeder 12, and the welding wire can be directed to the handheld welding gun 30 through the wire guide tube 13, so as to realize automatic supply of welding wire of the handheld welding machine.

[0050] A wire guide nozzle 32 is fixedly installed below the copper nozzle 31 , and the welding wire can be conducted to one side of the copper nozzle 31 through the wire guide nozzle 32 , so that the laser emitted by the wire guide nozzle 32 can melt the welding wire and complete the welding of the materials.

[0051] The gas cylinder 20 is fixed on one side of the laser welding main unit 10, and a shielding gas is stored inside the gas cylinder 20, wherein the shielding gas may be an inert gas such as helium, argon, nitrogen or carbon dioxide, which can continuously provide shielding gas for the welding process, so as to utilize the inert gas to protect the molten pool during the welding process to prevent oxidation and contamination.

[0052] A gas supply pipe 21 is fixedly mounted on the top of the gas cylinder 20, and the gas supply pipe 21 is used to transmit shielding gas to the handheld welding gun 30. A control valve 211 is fixedly mounted on the gas supply pipe 21, and the control valve 211 can control the on-off of the gas supply pipe 21 to control the supply of shielding gas.

[0053] like Figure 2-Figure 4 Combination Figure 6 As shown, an outer plate 40 is fixedly mounted on one end of the handheld welding gun 30 close to the copper nozzle 31, and the copper nozzle 31 is located on the central axis of the outer plate 40. A first cavity 46, a second cavity 47 and a third cavity 48 are sequentially arranged inside the outer plate 40, and the first cavity 46, the second cavity 47 and the third cavity 48 are all annular and concentrically arranged.

[0054] A third annular opening 45 is formed on one side of the first cavity 46 , a second annular opening 44 is formed on one side of the second cavity 47 , and a first annular opening 43 is formed on one side of the third cavity 48 .

[0055] Among them, one end of the air supply pipe 21 away from the gas cylinder 20 is fixedly installed on the external plate 40 and is connected to the inside of the third cavity 48, that is, the protective gas inside the gas cylinder 20 can be transmitted to the inside of the third cavity 48 through the air supply pipe 21, and then blown out through the first annular opening 43 on one side of the third cavity 48.

[0056] Preferably, the first annular opening 43 is inclined toward the central axis of the outer disk 40, that is, the gas blown out of the first annular opening 43 will gradually gather at the copper nozzle 31, so that the welding part can be fully covered by the protective gas, thereby fully isolating the outside air, so that the welding process is not affected by the outside air environment, especially in an environment with relatively high air humidity, which can avoid the occurrence of pore defects caused by air with relatively high humidity, which is beneficial to improving the welding quality.

[0057] like Figure 2 and Figure 3 As shown, a suction and exhaust mechanism is fixedly installed on the handheld welding gun 30, and the suction and exhaust mechanism includes an air pump 80, which is fixedly installed on the top of the handheld welding gun 30. An air extraction pipe 82 and an air injection pipe 81 are fixedly installed at the input end and the output end of the air pump 80, respectively. Among them, one end of the air extraction pipe 82 is connected to the inside of the second cavity 47, that is, the input end of the air pump 80 can be exhausted through the second annular opening 44 on the second cavity 47. One end of the air injection pipe 81 is connected to the inside of the first cavity 46, that is, the output end of the air pump 80 can blow air through the third annular opening 45 on the first cavity 46.

[0058] Specifically, Figure 7 As shown, during the welding process, the shielding gas blown out through the first annular opening 43 will absorb a large amount of heat at the welding site to form hot shielding gas, and the hot shielding gas will spread around. At this time, the hot shielding gas can be drawn into the second cavity 47 through the second annular opening 44 to collect the hot shielding gas.

[0059] Among them, Figure 6 As shown, one end of the wire guide tube 13 away from the wire feeder 12 is fixedly mounted on the external disk 40, and the wire guide tube 13 and the wire guide nozzle 32 are respectively fixed on the two sides of the second cavity 47. After being conducted by the wire guide tube 13, the welding wire passes through the second cavity 47 and then enters the wire guide nozzle 32. When the welding wire passes through the second cavity 47, the hot shielding gas dries its surface to remove moisture on the surface of the welding wire, thereby avoiding porosity defects caused by excessive moisture on the surface of the welding wire.

[0060] It is worth noting that in the process of extracting the thermal shielding gas, the harmful gases generated by welding will be drawn into the second cavity 47 along with the thermal shielding gas, thereby collecting the harmful gases and effectively preventing the harmful gases from spreading outward, protecting the physical and mental health of the construction workers, and avoiding environmental pollution, thereby improving the environmental performance of the handheld welding machine.

[0061] After entering the second cavity 47 , the thermal protection gas is sequentially sent into the first cavity 46 through the exhaust pipe 82 , the air pump 80 and the gas injection pipe 81 , and finally blown out again through the third annular opening 45 on one side of the first cavity 46 .

[0062] like Figure 2 and Fig.11 As shown, an intermediate seat 70 is also fixedly installed at the top of the handheld welding gun 30, and an inner groove 74 is arranged inside the intermediate seat 70. The gas injection pipe 81 and the gas extraction pipe 82 both pass through the intermediate seat 70, and the gas extraction pipe 82 is connected to the inner groove 74. A primary filter screen 71, an activated carbon filter element 72 and a secondary filter screen 73 are fixedly installed in the inner groove 74 in sequence. The primary filter screen 71, the activated carbon filter element 72 and the secondary filter screen 73 can effectively purify the thermal shielding gas to remove harmful components in the harmful gas, so as to ensure that the thermal shielding gas will not endanger the personal safety of personnel and the environment after being blown out again.

[0063] The hot shielding gas is blown out through the third annular opening 45, and the heat in the hot shielding gas can be used to dry the welding part to remove moisture on the surface of the base material in advance. The dirt on the surface of the base material can be removed by blowing, thereby achieving automatic cleaning of the welding part to ensure high-quality welding.

[0064] Preferably, the second annular opening 44 is inclined toward the central axis of the external disk 40, and the inclination angle of the first annular opening 43 is greater than the inclination angle of the second annular opening 44, ensuring that the hot protective gas can be accurately extracted through the second annular opening 44 without affecting the protective gas blown out of the first annular opening 43.

[0065] Preferably, the third annular opening 45 is inclined toward the edge direction of the outer disk 40, that is, the inclination direction of the third annular opening 45 is opposite to the inclination direction of the first annular opening 43, so that the third annular opening 45 can only blow air to the outside, ensuring that the hot shielding gas blown out of the third annular opening 45 will not flow to the copper nozzle 31, that is, will not flow to the welding part, so as to prevent the blown hot shielding gas from blowing moisture and dirt to the welding part, thereby avoiding affecting the welding operation in progress.

[0066] It is worth noting that the thermal shielding gas blown out through the third annular opening 45 can also prevent sparks from flying outwards during the welding process, so as to prevent the flying sparks from scalding the construction workers, thereby improving the safety of the handheld welding machine.

[0067] Furthermore, the second cavity 47 and the third cavity 48 are separated by a metal heat-conducting ring. Through the metal heat-conducting ring, the hot shielding gas entering the second cavity 47 can also exchange heat with the shielding gas passing through the third cavity 48, thereby preheating the shielding gas inside the third cavity 48, reducing the influence of blowing shielding gas on the welding temperature, and making it easier to control the welding temperature.

[0068] Shielding gas is blown through the first annular opening 43 to completely isolate the air in the welding area, and the generated hot shielding gas is used to dry the welding wire and the surface of the base material, effectively avoiding serious porosity defects caused by high relative humidity of the air, so that the welding operation is no longer restricted by a humid environment, which is effective in rainy and humid areas.

[0069] like Figure 2-Figure 4 As shown, a ferrule 41 is rotatably mounted on the outer side of the external disk 40, and a first hollow rod 50 and a second hollow rod 60 are rotatably mounted on both sides of the ferrule 41. Among them, a first air distribution pipe 51 is fixedly mounted on the first hollow rod 50, and one end of the first air distribution pipe 51 away from the first hollow rod 50 is connected to the inside of the first cavity 46. After the thermal shielding gas enters the first cavity 46, part of it can enter the first hollow rod 50 through the first air distribution pipe 51. A first external air port 52 is provided on one end surface of the first hollow rod 50 close to the copper nozzle 31, and the thermal shielding gas entering the first hollow rod 50 can also be blown out through the first external air port 52 to blow and dry the welding part.

[0070] Specifically, since the drying effect of the hot shielding gas blown out through the third annular opening 45 is limited, when there is too much moisture on the surface of the base material, a good drying effect cannot be achieved. However, the hot shielding gas can be continuously blown out to the welding part through the first outer extension gas port 52 on the first hollow rod 50, which has a better drying effect and ensures that the moisture on the surface of the base material is fully removed. The hot shielding gas is blown through the third annular opening 45 and the first outer extension gas port 52 at the same time. The combination of the two can not only achieve efficient surface drying, but also effectively clean the surface, thereby ensuring the subsequent welding quality.

[0071] The second hollow rod 60 is located on the opposite side of the first hollow rod 50, and a second gas distribution pipe 61 is fixedly installed on the second hollow rod 60. One end of the second gas distribution pipe 61 away from the second hollow rod 60 is connected to the inside of the first cavity 46. After the hot shielding gas enters the inside of the first cavity 46, a part of it can enter the inside of the second hollow rod 60 through the second gas distribution pipe 61. A second extension gas port 62 is provided on the end surface of the second hollow rod 60 close to the copper nozzle 31, and the hot shielding gas entering the inside of the second hollow rod 60 can also be blown out through the second extension gas port 62 to slowly cool the welded part.

[0072] In an environment with high relative humidity and low temperature, the weld will cool down quickly after welding. If it cools down quickly, it will cause crack defects. By blowing hot shielding gas after welding, it can not only slow down the cooling, but also prevent the oxidation of the weld with the help of hot shielding gas, which has a good protective effect on the weld after welding and is beneficial to improving the welding quality.

[0073] Among them, Figure 4 Combination Fig. 9and Fig.10 As shown, multiple groups of spoiler assemblies 63 are installed inside the second extension air port 62. The spoiler assemblies 63 include a support shaft 631 and at least three groups of spoiler plates 632. The support shaft 631 is rotatably installed inside the second extension air port 62. At least three groups of spoiler plates 632 are fixedly installed on the support shaft 631. The second extension air port 62 can be shielded by the spoiler plates 632, so that the hot protective gas will not be directly blown out through the second extension air port 62 after entering the second hollow rod 60, but will flow inside the second hollow rod 60. During the flow, the spoiler plates 632 are driven to rotate around the support shaft 631 to disturb the hot protective gas, so that it is buffered and then slowly blown out.

[0074] Specifically, if the hot shielding gas is blown out directly through the second extension gas port 62, due to the fast gas flow rate, the slow cooling effect it can provide is very limited. However, after the turbulence, the gas is slowly released to the weld where welding is completed, which can effectively improve the slow cooling effect and enable the hot shielding gas to form a short-term shielding gas mass at the weld where welding is completed, so as to achieve better anti-oxidation protection effect.

[0075] The first hollow rod 50 and the second hollow rod 60 can effectively dry and clean the welded area during the welding process and effectively protect the weld seam, so as to achieve higher quality welding.

[0076] like Figure 4 Combination Figure 5 As shown, a first protective shell 53 is rotatably mounted on one end of the first hollow rod 50 away from the outer disk 40, and a second protective shell 64 is mounted on one end of the second hollow rod 60 away from the outer disk 40. Both the first protective shell 53 and the second protective shell 64 match the copper mouth 31, and the two can protect the copper mouth 31 together.

[0077] Specifically, in the working state, the first protective shell 53 and the second protective shell 64 are folded on the backs of the first hollow rod 50 and the second hollow rod 60 respectively, which will not affect the operation; in the non-working state, the first hollow rod 50 and the second hollow rod 60 can be rotated forward, and then the first protective shell 53 and the second protective shell 64 can be rotated and unfolded. The first protective shell 53 and the second protective shell 64 can well protect the copper nozzle 31 to prevent the copper nozzle 31 from being damaged, thereby ensuring the performance when used again, which is conducive to extending the service life of the handheld welding machine.

[0078] It is worth noting that the first hollow rod 50 and the second hollow rod 60 can also be rotated backwards and folded behind the external plate 40 to achieve better concealment and ensure the convenience of using the handheld welding machine.

[0079] like Figure 6 and Figure 8As shown, a screw hole 411 is formed on the ferrule 41 , and a fastening bolt 42 is screwed into the screw hole 411 . The ferrule 41 is locked and fixed on the outside of the outer plate 40 by the fastening bolt 42 .

[0080] By loosening the fastening bolts 42, the ferrule 41 can be unfixed and can rotate outside the external disk 40, so that the positions of the first hollow rod 50 and the second hollow rod 60 can be adjusted, thereby enhancing the flexibility and adaptability of use.

[0081] When in use, during the process of welding by emitting laser through the copper nozzle 31 to melt the welding rod, a protective gas is blown to the welding part through the first annular opening 43 on the side of the third cavity 48 to generate a hot protective gas, and the hot protective gas is extracted through the second annular opening 44 and sent into the interior of the first cavity 46. While being blown out through the third annular opening 45 on the side of the first cavity 46, it is also blown out to the part to be welded through the first external gas port 52 on the first hollow rod 50 to achieve drying of the part to be welded, and slowly released to the weld that has been welded after turbulence through the second external gas port 62 on the second hollow rod 60, so as to achieve slow cooling and protection of the weld after welding. That is, the handheld welding machine can simultaneously complete welding, pretreatment of the part to be welded and protection of the weld after welding, so as to achieve high-quality welding operations.

[0082] Compared with the prior art, the present invention blows out all-round protective gas to the welding part through the first annular opening 43, and can fully isolate the welding part with the help of the protective gas, thereby fully isolating the humid air and generating hot protective gas, and collects the hot protective gas through the second annular opening 44, so that the hot protective gas is blown out again through the third annular opening 45 to purge the welding part, thereby drying and cleaning the welding part, removing moisture and dirt on the surface of the parent material, and at the same time, can use the hot protective gas to dry the welding wire in real time, effectively avoiding the presence of moisture on the surface of the parent material and the welding material to cause pore defects, improving the welding quality, and making the welding not restricted by the humid environment;

[0083] In addition, while extracting the hot shielding gas, harmful gases generated by welding can also be collected to prevent the harmful gases from spreading outward, thereby protecting the environment and the physical and mental health of workers. At the same time, the hot shielding gas blown out again by the third annular opening 45 can hinder the splashing of sparks during welding, prevent scalding incidents, and improve the safety of the handheld welding machine.

[0084] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0085] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A handheld welding machine, characterized in that: include: A laser welding main machine, wherein a laser is fixedly installed inside the laser welding main machine, an optical fiber is fixedly installed on the laser, a wire reel and a wire feeder are installed on the laser welding main machine, welding wire is wound on the wire reel, and a wire guide tube is fixedly installed on the wire feeder; A gas cylinder, which is mounted on the laser welding main machine, contains protective gas, and is fixedly provided with a gas supply pipe; A handheld welding gun, on which one end of the optical fiber line away from the laser welding host is fixedly mounted, and a copper nozzle and a wire guide nozzle are respectively fixedly mounted; An external disk is fixedly mounted on one end of the handheld welding gun close to the copper nozzle, the copper nozzle is located on the central axis of the external disk, a first cavity, a second cavity and a third cavity are sequentially arranged inside the external disk, and a third annular opening, a second annular opening and a first annular opening are respectively opened on one side of the first cavity, the second cavity and the third cavity close to the copper nozzle; One end of the gas supply pipe away from the gas cylinder is fixedly mounted on the external plate and communicated with the interior of the third cavity; One end of the wire guide tube away from the wire feeder is fixedly mounted on the external disk, the wire guide tube matches the wire guide nozzle, and the welding wire passes through the wire feeder, the wire guide tube and the second cavity in sequence before entering the wire guide nozzle; The handheld welding gun is fixedly provided with an exhaust mechanism, the air inlet end of the exhaust mechanism is connected to the interior of the second cavity, and the air outlet end of the exhaust mechanism is connected to the interior of the first cavity; A ferrule is rotatably mounted on the outer side of the external disk, a first hollow rod is rotatably mounted on the ferrule, and a first external extension air port is opened on one end surface of the first hollow rod close to the copper nozzle; A first air distribution pipe is fixedly mounted on the first hollow rod, and one end of the first air distribution pipe away from the first hollow rod is connected to the interior of the first cavity; A second hollow rod is rotatably mounted on the ferrule, the second hollow rod is located on the opposite side of the first hollow rod, and a second extension air port is provided on an end surface of the second hollow rod close to the copper nozzle; A plurality of spoiler components are installed inside the second extension air port; A second air distribution pipe is fixedly mounted on the second hollow rod, and one end of the second air distribution pipe away from the second hollow rod is in communication with the interior of the first cavity.

2. A handheld welding machine according to claim 1, characterized in that: The first annular opening and the second annular opening are both inclined toward the central axis of the outer attached disk, the inclination angle of the first annular opening is greater than the inclination angle of the second annular opening, and the third annular opening is inclined toward the edge of the outer attached disk.

3. A handheld welding machine according to claim 2, characterized in that: The second cavity and the third cavity are separated by a metal heat-conducting ring.

4. A handheld welding machine according to claim 1, characterized in that: The exhaust mechanism includes an air pump, which is fixedly mounted on the handheld welding gun. An exhaust pipe and an injection pipe are fixedly mounted on the input and output ends of the air pump, respectively. One end of the exhaust pipe is connected to the interior of the second cavity, and one end of the injection pipe is connected to the interior of the first cavity.

5. A handheld welding machine according to claim 4, characterized in that: The handheld welding gun is fixedly provided with an intermediate seat, the interior of the intermediate seat is provided with an inner groove, and the interior of the inner groove is fixedly provided with a primary filter screen, an activated carbon filter element and a secondary filter screen in sequence; The air injection pipe and the air extraction pipe both pass through the middle seat, and the air extraction pipe is communicated with the interior of the inner tank.

6. A handheld welding machine according to claim 1, characterized in that: The spoiler assembly comprises a support shaft and a plurality of spoiler plates. The support shaft is rotatably mounted inside the second extension air port, and the plurality of spoiler plates are fixedly mounted on the support shaft.

7. A handheld welding machine according to claim 1, characterized in that: A first protective shell is rotatably mounted on one end of the first hollow rod away from the outer attached disk, and a second protective shell is mounted on one end of the second hollow rod away from the outer attached disk; The first protective shell and the second protective shell are both matched with the copper nozzle.

8. A handheld welding machine according to claim 1, characterized in that: The ferrule is provided with a screw hole, and a fastening bolt is screwed inside the screw hole.

Images