Portable automatic welding device

Abstract

The invention relates to the technical field of automatic welding devices, in particular to a portable automatic welding device which comprises a U-shaped seat arranged below the centers of two external automatic welding guns, U-shaped blocks used for aligning adapters are arranged on the two sides of the U-shaped seat, and a motor in an aligning mechanism is started to drive a gear to rotate, so that the adapters are aligned with the U-shaped blocks; the two racks are driven to drive the two U-shaped blocks to move oppositely or oppositely, a first mounting block for clamping the adapter and a second mounting block for clamping the short wire are aligned with each other, and during the period, along with movement of the U-shaped blocks, a first piston block in the clamping mechanism is extruded into a sealing cavity at the same time; and compressed gas generated by piston movement in the sealing cavity can push the second piston block connected with the piston in the sealing cavity to stably clamp the adapters, so that the effect of stably clamping and aligning the adapters with different lengths in a certain range is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic welding devices, in particular to a portable automatic welding device. Background Art

[0002] In the field of adapter welding, the difficulty of welding varies due to the influence of the adapter model and the length of the welding wire. In some small enterprises, most of them rely on manual welding. When faced with some difficult adapter welding tasks, such as welding short wires and adapters with multiple connection columns, there are problems such as dense adapter connection points and short wires that are inconvenient to clamp. As a result, it is easy for manual welding to cause problems such as loose welding and low welding efficiency.

[0003] When welding and feeding, the existing automatic welding device still needs to rely on manual alignment of the wire welding end and the adapter connection point. However, when manual welding is faced with short wires and multiple connection points on the adapter, it is difficult to ensure that the welding end of each wire can be accurately aligned with the connection point of the adapter, which easily leads to the problem of loose welding.

[0004] Existing automatic welding devices lack a precise automatic feeding mechanism and rely solely on manual alignment and welding, which is not only inefficient but also very likely to cause loose welds. In view of this, we propose a portable automatic welding device. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies mentioned in the above background technology and provide a portable automatic welding device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A portable automatic welding device, comprising:

[0008] A U-shaped seat is provided below the center of two external automatic welding guns, with U-shaped blocks for aligning the adapters provided on both sides of the U-shaped seat, and a first mounting block for clamping the adapters is fixedly connected to the U-shaped block, and two second mounting blocks for clamping short wires are provided on the U-shaped seat, and the two second mounting blocks correspond to the two first mounting blocks;

[0009] an alignment mechanism disposed in the U-shaped seat, the alignment mechanism comprising a rack for pushing the U-shaped block to align with the second mounting block, a gear for driving the rack to reciprocate, and a motor for providing power to the gear;

[0010] The clamping mechanism is arranged on the U-shaped block, and the clamping mechanism includes a sealed cavity opened in the U-shaped block for the flow of compressed gas, a first piston block connected to the sealed cavity piston, and a second piston block that utilizes the flow of compressed gas in the sealed cavity to stably clamp the adapter.

[0011] Preferably, the two first mounting blocks are respectively arranged corresponding to the sealed cavities in the U-shaped blocks fixedly connected thereto, and a plurality of grooves for limiting the adapter connection columns are provided on one side of the first mounting block opposite to the second mounting block.

[0012] Preferably, a plurality of clamping blocks for clamping short wires are fixedly connected to the second mounting block, and the plurality of clamping blocks are respectively arranged corresponding to the grooves on the first mounting block. A welding strip for welding protection is arranged between the clamping block and the first mounting block, and the welding strip is fixedly connected to the top of the second mounting block. Multiple protrusions are fixedly connected to the top of the welding strip, and the multiple protrusions are evenly arranged between two adjacent clamping block ports.

[0013] Preferably, the inner walls on both sides of the U-shaped seat are provided with a first mounting groove and two second mounting grooves, and the two second mounting grooves are respectively located on the upper and lower sides of the first mounting groove, there are four racks, and the four racks are respectively limited and slidably connected in the corresponding second mounting grooves, there are two gears, and the two gears are respectively rotatably connected in the corresponding first mounting grooves, each of the gears is respectively meshed with the two corresponding racks above and below, the motor is fixedly connected to the outer wall of the U-shaped seat, and the output shaft passes through the U-shaped seat and is fixedly connected to the center of the gear, and the left and right sides corresponding to the opposite sides of the racks are fixedly connected with connecting blocks, a rotating plate is provided on the connecting block, and the top of the rotating plate is clamped with the second mounting block, and there are two upper and lower rotating plates and the second mounting blocks, and the left and right ends of the two second mounting blocks are oppositely arranged.

[0014] Preferably, one side of the rotating plate is rotatably connected to one of the connecting blocks at the bottom, and the other side is snap-connected to another connecting block at the bottom.

[0015] Preferably, a card slot is provided on the rotating plate, and a card block that matches the card slot on the rotating plate is fixedly connected to the bottom of the second mounting block, and the card block is engaged in the card slot.

[0016] Preferably, the clamping mechanism further comprises fixing blocks fixedly connected to both ends of the first mounting groove, and there are four fixing blocks, which are respectively fixedly connected to one end of four corresponding first piston blocks.

[0017] Preferably, a pressure valve for pressure relief and a one-way valve for pressure charging are embedded in each of the four sealed cavities.

[0018] Preferably, an abutment block is fixedly connected to one end of the second piston block away from the sealing cavity.

[0019] Preferably, two limiting grooves are provided at the bottom of the U-shaped seat, and sliders are connected in a limiting sliding manner in the limiting grooves. The lengths of the two sliders are smaller than the lengths of the limiting grooves, and the sliders are fixedly connected to the opposite sides of the two U-shaped blocks respectively.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This portable automatic welding device starts the motor in the alignment mechanism to drive the gear to rotate, and prompts the two racks to drive the two U-shaped blocks to move relative to or opposite to each other, thereby completing the mutual alignment of the first mounting block for clamping the adapter and the second mounting block for clamping the short wire. During this period, as the U-shaped block moves, the first piston block in the clamping mechanism is squeezed into the sealed cavity, so that the compressed gas generated by the piston movement in the sealed cavity will push the second piston block, which is also connected to the piston in the sealed cavity, to stably clamp the adapter, thereby achieving the effect of stable clamping and alignment of adapters of different lengths within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the U-shaped seat and the U-shaped block in the present invention;

[0025] Figure 3 It is a structural schematic diagram of the gear, rack and first piston block in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the U-shaped block and the first installation position in the present invention;

[0027] Figure 5 This is a structural diagram of the first mounting block and the second mounting block in the present invention;

[0028] Figure 6 It is a structural schematic diagram of the clamping block and the rotating plate in the present invention;

[0029] Figure 7 It is a structural schematic diagram of the U-shaped seat in the present invention;

[0030] Figure 8 It is a schematic diagram of the cross-sectional structure of the U-shaped block in the present invention.

[0031] The meaning of each number in the figure is:

[0032] 1. U-shaped seat; 11. Limiting groove; 12. Slider; 2. U-shaped block; 21. First mounting block; 22. Groove; 3. Second mounting block; 31. Clamping block; 32. Welding strip; 33. Clamping block; 34. Rotating plate; 4. Alignment mechanism; 41. First mounting groove; 411. Second mounting groove; 42. Gear; 43. Motor; 44. Rack; 45. Connecting block; 5. Clamping mechanism; 51. Sealing chamber; 52. First piston block; 521. Fixed block; 53. Second piston block; 531. Abutment block; 54. Pressure valve; 55. One-way valve. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] The present invention describes the above technical solution in detail through the following embodiments:

[0035] Example 1

[0036] See also Figures 1-8 As shown, a portable automatic welding device includes a U-shaped base 1 disposed below the center of two external automatic welding guns, with U-shaped blocks 2 for aligning adapters disposed on both sides of the U-shaped base 1, and a first mounting block 21 for clamping the adapters fixedly connected to the U-shaped block 2. The U-shaped base 1 is provided with two second mounting blocks 3 for clamping short wires, and the two second mounting blocks 3 correspond to the two first mounting blocks 21.

[0037] An alignment mechanism 4 is disposed in the U-shaped seat 1 and includes a rack 44 for pushing the U-shaped block 2 to align with the second mounting block 3, a gear 42 for driving the rack 44 to reciprocate, and a motor 43 for providing power to the gear 42;

[0038] The clamping mechanism 5 is arranged on the U-shaped block 2, and the clamping mechanism 5 includes a sealed chamber 51 opened in the U-shaped block 2 for the flow of compressed gas, a first piston block 52 connected to the sealed chamber 51 by a piston, and a second piston block 53 that utilizes the flow of compressed gas in the sealed chamber 51 to stably clamp the adapter.

[0039] The two adapters are respectively installed in the first mounting block 21 on the U-shaped block 2, and the short wire welding ends on the two second mounting blocks 3 are made to correspond to the connecting columns of the adapter on the first mounting block 21, so that the two automatic welding guns can automatically weld the two adapters and the short wires after quick alignment. By starting the motor 43 in the alignment mechanism 4, it drives the gear 42 to rotate, and prompts the two racks 44 to drive the U-shaped block 2 to move relative to or away from each other, thereby completing the alignment of the first mounting block 21 clamping the adapter and the second mounting block 3 clamping the short wire. During this period, as the U-shaped block 2 moves, the first piston block 52 will be squeezed into the sealed cavity 51, so that the compressed gas generated by the piston movement in the sealed cavity 51 will push the second piston block 53, which is also connected to the piston of the sealed cavity 51, to stably clamp the adapter, so as to achieve the effect of stable clamping and alignment of adapters of different lengths within a certain range.

[0040] Furthermore, the inner walls on both sides of the U-shaped seat 1 are provided with a first mounting groove 41 and two second mounting grooves 411, and the two second mounting grooves 411 are respectively located on the upper and lower sides of the first mounting groove 41, there are four racks 44, and the four racks 44 are respectively limited and slidably connected in the corresponding second mounting grooves 411, there are two gears 42, and the two gears 42 are respectively rotatably connected in the corresponding first mounting grooves 41, each of the gears 42 is respectively engaged with the two corresponding racks 44 above and below, the motor 43 is fixedly connected to the outer wall of the U-shaped seat 1, and the output shaft passes through the U-shaped seat 1 and is fixedly connected to the center of the gear 42, and the opposite sides of the left and right corresponding racks 44 are fixedly connected with a connecting block 45, and a rotating plate 34 is provided on the connecting block 45, and the top of the rotating plate 34 is connected to the second mounting groove The block 3 is clamped, and the rotating plate 34 and the second mounting block 3 both have two upper and lower parts, and the left and right ends of the two second mounting blocks 3 are arranged oppositely. By respectively opening a first mounting groove 41 and a second mounting groove 411 on both sides of the inner wall of the U-shaped seat 1, the effect of convenient installation of the gear 42 and the rack 44 can be achieved, and the meshing connection between the gear 42 and the rack 44 facilitates the reciprocating movement of the rack 44. When the rack 44 reciprocates, the rotating plate 34 set on the connecting block 45 and the second mounting block 3 clamped with the rotating plate 34 can be driven to move synchronously through the connecting block 45 fixedly connected to the rack 44, and when the rack 44 drives the U-shaped block 2 to move relative to each other, the second mounting block 3 and the first mounting block 21 are aligned, and the opposite arrangement of the two second mounting blocks 3 can facilitate automatic welding by two automatic welding guns.

[0041] Furthermore, the clamping mechanism 5 also includes a fixed block 521 fixedly connected to both ends of the first mounting groove 41. There are four fixed blocks 521, which are respectively fixedly connected to one end of the four corresponding first piston blocks 52. The second piston block 53 is fixedly connected to an abutment block 531 at one end away from the sealing cavity 51. By fixing the fixed blocks 521 fixedly connected to both ends of the first mounting groove 41 and fixedly connected to one end of the four corresponding first piston blocks 52, the U-shaped seat 1 can remain stationary, and when the two U-shaped blocks 2 are driven to move closer to each other through the alignment mechanism 4, the first piston block 52 will be squeezed and pushed into the sealing cavity 51 connected by the fixed block 521 when the U-shaped blocks 2 move closer, and then compressed gas will be generated in the sealing cavity 51, pushing the second piston block 53 to stably clamp the two sides of the adapter. The abutment block 531 is fixedly connected to the second piston block 53, which can increase the clamping area and enhance the stability of the clamping.

[0042] Among them, the four sealed chambers 51 are all embedded with pressure valves 54 for pressure relief and one-way valves 55 for pressurization. Through the above settings, when facing the need for corresponding clamping of adapters of different lengths, the pressure valve 54 and the one-way valve 55 can use the flow of compressed gas to complete the stable clamping of the second piston block 53. When the length of the adapter is longer than the standard length, under the extrusion of the first piston block 52, there is too much compressed gas in the sealed chamber 51. In order to keep the second piston block 53 stably clamped on both sides of the adapter, the pressure valve 54 will discharge the excess gas into the sealed chamber 51, so that the internal compressed gas just meets the stable clamping of the long adapter. When the adapter is replaced with a short adapter, the internal compressed gas cannot meet the clamping length of the second piston block 53, and it only needs to be inflated through the one-way valve 55, and finally achieve the effect of stable clamping of adapters of different lengths within a certain range.

[0043] Example 2

[0044] Further supplements are made based on Example 1. Please refer to Figures 1-8As shown, the two first mounting blocks 21 are respectively provided with the sealed cavity 51 in the U-shaped block 2 fixedly connected thereto, and the first mounting block 21 is provided with a plurality of grooves 22 for limiting the adapter connecting column on one side relative to the second mounting block 3. The second mounting block 3 is fixedly connected with a plurality of clamping blocks 31 for clamping short wires, and the plurality of clamping blocks 31 are respectively provided with the grooves 22 on the first mounting block 21. A welding strip 32 for welding protection is provided between the clamping block 31 and the first mounting block 21, and the welding strip 32 is fixedly connected to the top of the second mounting block 3. The top of the welding strip 32 is fixedly connected with multiple protrusions, and the multiple protrusions are evenly arranged between the ports of two adjacent clamping blocks 31, through the first mounting block 21 Corresponding to the sealing cavity 51, the first mounting block 21 is provided with a plurality of grooves 22 on one side relative to the second mounting block 3 for limiting the adapter connection column, which can meet the needs of the two adapters and the two second mounting blocks 3 corresponding to the short wires and the internal clamping wire welding ends to adapt to the two automatic welding guns. By setting the plurality of clamping blocks 31 corresponding to the grooves 22 on the first mounting block 21, the plurality of short wires clamped on the second mounting block 3 can be aligned with the plurality of connection columns on the adapter respectively, and the setting of the welding bar 32 and the protrusions on the welding bar 32 can facilitate the welding process of the welding gun, and the temperature emitted by the welding head will not affect other wires around the welding wire, thereby playing a protective role in independent welding.

[0045] In addition, two limiting grooves 11 are provided at the bottom of the U-shaped seat 1, and a slider 12 is slidingly connected in the limiting groove 11. The length of the two sliders 12 is less than the length of the limiting groove 11, and they are fixedly connected to the opposite sides of the two U-shaped blocks 2 respectively. By providing the limiting grooves 11 on the U-shaped seat 1 and slidingly connecting the sliders 12 fixedly connected to the U-shaped blocks 2, the stability of the U-shaped blocks 2 during movement can be further improved, thereby enhancing the accuracy of aligning the adapter with the short wire.

[0046] Example 3

[0047] Further improvements are made based on Example 1. Figures 1-8 As shown, one side of the rotating plate 34 is rotatably connected to one of the bottom connecting blocks 45, and the other side is engaged with another bottom connecting block 45. Through the above arrangement of the rotating plate 34 and the connecting blocks 45, it is possible to easily rotate the rotating plate 34 to adjust the angle, thereby facilitating the placement of the upper and lower second mounting blocks 3 and the inspection and replacement of the internal gear 42 and rack 44 of the U-shaped seat 1.

[0048] It should be noted that the rotating plate 34 has a slot, and a block 33 is fixedly connected to the bottom of the second mounting block 3, which is compatible with the slot on the rotating plate 34, and the block 33 is locked in the slot. This arrangement facilitates the installation of the second mounting block 3. When installing the second mounting block 3, simply engage the block 33 at the bottom of the second mounting block 3 with the slot on the rotating plate 34. This ensures the stability of the second mounting block 3 while facilitating quick and easy installation and removal.

[0049] The portable automatic welding device of this embodiment has the following working principle: when using the device, the second mounting block 3, which holds a plurality of short conductors, is first clamped onto the rotating plate 34. At the same time, the adapter to be welded is placed into the first mounting block 21, completing the rapid assembly of the adapter and the short conductors. It should be noted that the two first mounting blocks 21 and the two second mounting blocks 3 are arranged in correspondence to ensure that the connecting posts of the adapter correspond to the welding ends of the short conductors.

[0050] Then, by starting the motor 43, it drives the gear 42 to rotate, and utilizes the meshing connection relationship between the gear 42 and the rack 44 to cause the rack 44 to reciprocate. When the rack 44 reciprocates, the connecting block 45 fixedly connected to the rack 44 can drive the rotating plate 34 set on the connecting block 45 and the second mounting block 3 engaged with the rotating plate 34 to move synchronously, and when the rack 44 drives the U-shaped block 2 to move relative to each other, the second mounting block 3 and the first mounting block 21 are aligned, thereby achieving the mutual overlap of the adapter connecting column and the short wire welding end, which is convenient for the two automatic welding guns to perform automatic welding. Since the height settings of the two second mounting blocks 3 and the first mounting block 21 are different, the two external electric welding guns should also be installed in an adaptive manner to facilitate welding.

[0051] By fixing the fixed blocks 521 fixedly connected to the two ends of the first mounting groove 41 and fixedly connecting the four corresponding first piston blocks 52 at one end, it is possible to achieve that the U-shaped seat 1 remains stationary, and when the two U-shaped blocks 2 are driven to move closer to each other by the alignment mechanism 4, the first piston block 52 will be squeezed and pushed into the sealed cavity 51 connected by the fixed block 521 when the U-shaped blocks 2 move closer, thereby generating compressed gas in the sealed cavity 51, pushing the second piston block 53 to stably clamp the two sides of the adapter, and the abutment block 531 is fixedly connected to the second piston block 53, which can increase the clamping area and enhance the clamping stability. When adapters of different lengths need to be clamped accordingly, the pressure valve 54 and the single The one-way valve 55 can utilize the flow of compressed gas to complete the stable clamping of the second piston block 53. When the length of the adapter is longer than the standard length, under the extrusion of the first piston block 52, there is too much compressed gas in the sealing chamber 51. In order to keep the second piston block 53 stably clamped on both sides of the adapter, the pressure valve 54 will discharge the excess gas from the sealing chamber 51, so that the internal compressed gas just meets the stable clamping of the long adapter. When the adapter is replaced with a short adapter, the internal compressed gas cannot meet the clamping length of the second piston block 53. It only needs to be inflated through the one-way valve 55, and finally achieve the effect of stable clamping of adapters of different lengths within a certain range.

[0052] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0053] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A portable automatic welding device, characterized in that: include: A U-shaped seat (1) is provided below the center of two external automatic welding guns, U-shaped blocks (2) for aligning the adapter are provided on both sides of the U-shaped seat (1), and a first mounting block (21) for clamping the adapter is fixedly connected to the U-shaped block (2), and two second mounting blocks (3) for clamping short wires are provided on the U-shaped seat (1), and the two second mounting blocks (3) correspond to the two first mounting blocks (21); an alignment mechanism (4), the alignment mechanism (4) being arranged in the U-shaped seat (1), the alignment mechanism (4) comprising a rack (44) for pushing the U-shaped block (2) to align with the second mounting block (3), a gear (42) for driving the rack (44) to move back and forth, and a motor (43) for providing power to the gear (42); A clamping mechanism (5) is provided on a U-shaped block (2), comprising a sealed cavity (51) provided in the U-shaped block (2) for the flow of compressed gas, a first piston block (52) connected to a piston of the sealed cavity (51), and a second piston block (53) for stably clamping the adapter by utilizing the flow of compressed gas in the sealed cavity (51).

2. A portable automatic welding device according to claim 1, characterized in that: The two first mounting blocks (21) are respectively arranged corresponding to the inner sealed cavity (51) of the U-shaped block (2) fixedly connected thereto, and a plurality of grooves (22) for limiting the adapter connection column are provided on one side of the first mounting block (21) opposite to the second mounting block (3).

3. A portable automatic welding device according to claim 2, characterized in that: A plurality of clamping blocks (31) for clamping short wires are fixedly connected to the second mounting block (3), and the plurality of clamping blocks (31) are respectively arranged corresponding to the grooves (22) on the first mounting block (21). A welding bar (32) for welding protection is arranged between the clamping block (31) and the first mounting block (21), and the welding bar (32) is fixedly connected to the top of the second mounting block (3). The top of the welding bar (32) is fixedly connected to a plurality of protrusions, and the plurality of protrusions are evenly arranged between the ports of two adjacent clamping blocks (31).

4. A portable automatic welding device according to claim 1, characterized in that: The inner walls of the U-shaped seat (1) on both sides are provided with a first mounting groove (41) and two second mounting grooves (411), and the two second mounting grooves (411) are respectively located on the upper and lower sides of the first mounting groove (41), there are four racks (44), and the four racks (44) are respectively limited and slidably connected in the corresponding second mounting grooves (411), there are two gears (42), and the two gears (42) are respectively rotatably connected in the corresponding first mounting grooves (41), and each gear (42) is respectively connected to the two corresponding gears on the upper and lower sides. The rack (44) is meshed and connected, the motor (43) is fixedly connected to the outer wall of the U-shaped seat (1), and the output shaft passes through the U-shaped seat (1) and is fixedly connected to the center of the gear (42), and the left and right sides corresponding to the opposite sides of the rack (44) are fixedly connected with a connecting block (45), and a rotating plate (34) is provided on the connecting block (45), and the top of the rotating plate (34) is engaged with the second mounting block (3), and the rotating plate (34) and the second mounting block (3) both have two upper and lower parts, and the left and right ends of the two second mounting blocks (3) are oppositely arranged.

5. A portable automatic welding device according to claim 4, characterized in that: One side of the rotating plate (34) is rotatably connected to one of the connecting blocks (45) at the bottom, and the other side is snap-connected to another connecting block (45) at the bottom.

6. A portable automatic welding device according to claim 4, characterized in that: A card slot is provided on the rotating plate (34), and a card block (33) adapted to the card slot on the rotating plate (34) is fixedly connected to the bottom of the second mounting block (3), and the card block (33) is engaged in the card slot.

7. The portable automatic welding device according to claim 1, characterized in that: The clamping mechanism (5) further comprises fixed blocks (521) fixedly connected to both ends of the first mounting groove (41). There are four fixed blocks (521) which are respectively fixedly connected to one end of four corresponding first piston blocks (52).

8. The portable automatic welding device according to claim 1, characterized in that: A pressure valve (54) for pressure relief and a one-way valve (55) for pressure charging are embedded in each of the four sealed chambers (51).

9. The portable automatic welding device according to claim 1, characterized in that: An end of the second piston block (53) away from the sealing chamber (51) is fixedly connected to an abutment block (531).

10. The portable automatic welding device according to claim 1, characterized in that: Two limiting grooves (11) are provided at the bottom of the U-shaped seat (1), and sliders (12) are connected in a limiting sliding manner in the limiting grooves (11). The lengths of the two sliders (12) are shorter than the length of the limiting grooves (11) and are fixedly connected to opposite sides of the two U-shaped blocks (2).

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