Multi-plate splicing and welding tool

Abstract

The invention belongs to the technical field of welding tools, and particularly relates to a multi-plate splicing welding tool which comprises a clamping point location frame and a supporting plate, a plurality of point location rails are arranged at the top of the supporting plate, the inclination angles of the point location rails are different, and a hydraulic clamping rod is slidably connected into each point location rail; a clamping base plate is fixedly mounted at the bottom of the hydraulic clamping rod, a plurality of adjusting frames for framing the hydraulic clamping rod are slidably connected to the top of the supporting plate, equidistant unfolding parts are arranged on the two sections of each adjusting frame, and transmission parts are arranged at the ends of the equidistant unfolding parts. The number of clamping point positions is adjusted according to the thickness of the plate, meanwhile, the distance between the adjacent clamping point positions is shortened, deformation is controlled through denser clamping points, the number and the distance between the clamping point positions are automatically adjusted according to the thickness of the plate, and the phenomenon that indentations appear on the surface of the plate due to the fact that the clamping force of a single clamping point position is too large is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of welding tooling, in particular to a multi-plate assembly welding tooling. Background Art

[0002] Multi-plate assembly is a process method that joins multiple individual plates together to form a larger area or a specific shape structure. It is usually done by welding. Welding tooling is used during the welding process to fix the weldment, ensure welding accuracy and improve welding efficiency. It is a set of fixtures that fix, press and position the weldment during the welding process. It can fix the weldment to prevent it from moving, deforming or shaking during the welding process; accurately position the weldment to reduce the impact of human factors on welding accuracy; quickly load and unload the weldment to shorten the welding preparation time. It can also realize the simultaneous welding of multiple weldments to improve production efficiency.

[0003] After searching, the patent with announcement number CN106541240B discloses a multi-plate assembly welding tool, which accurately positions the frame to be welded, which is assembled by two C-shaped plates and two rectangular end plates placed side by side, ensuring that the relative position between the C-shaped plates and the end plates will not change, avoiding the misalignment of any C-shaped plate or end plate to be welded, and avoiding the problems of uneven butt gap, dents in the weld and discontinuous weld during welding, facilitating welding operations and improving welding efficiency and welding accuracy.

[0004] The thicker the plate, the greater the clamping force required. However, during the welding process, excessive clamping force at a single point can easily cause local stress concentration at that point, leading to indentations, deformation, and even cracking on the plate surface. This is especially sensitive to some high-strength and brittle materials. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-plate assembly welding tool to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a multi-plate assembly welding tool, comprising a welding base, the top of which is rotatably connected to a conveying shaft, the top of which conveys two plates, and a welding device for welding the two plates fixedly installed in the middle of the welding base. A clamping point frame, wherein the clamping point frame includes a support plate, a plurality of point rails are opened on the top of the support plate, the inclination angle of each point rail is different, a hydraulic clamping rod is slidably connected in each point rail, a clamping pad is fixedly installed on the bottom of the hydraulic clamping rod, a plurality of adjustment frames that frame the hydraulic clamping rod are slidably connected to the top of the support plate, and both sections of the adjustment frame are provided with equidistant expansion parts, and the ends of the equidistant expansion parts are provided with transmission parts; The distance adjusting piece comprises a front plate, the bottom of the front plate is fixedly provided with a hydraulic injection piece, the bottom of the front plate is rotationally provided with a deflector, and the top of the deflector is rollingly connected with the hydraulic injection piece. The hydraulic injection piece is connected with a transmission piece through a hose, and the bottom of the clamping backing plate is in contact with the plate.

[0007] Optionally, the plurality of hydraulic clamping rods in the point track are on the same straight line, the distance between the two adjacent hydraulic clamping rods is equal, and the hydraulic clamping rods slide along the adjusting frame.

[0008] Optionally, the equidistance unfolding piece comprises a threaded block and a segmented threaded rod, a plurality of groups of the threaded blocks are arranged, two threaded blocks are arranged in each group, the two threaded blocks in each group are fixedly arranged at the two ends of the adjusting frame, the inner walls of the two threaded blocks in each group are threadedly connected with the segmented threaded rod, the threads on the segmented threaded rod are divided into a plurality of segments, and the thread distance of each segment gradually shortens from the end to the center.

[0009] Optionally, the transmission piece comprises a first gear, a second gear, a third gear, a toothed plate and a first hydraulic push rod, the third gear is rotationally arranged at the end of the second gear, the end of the supporting plate is rotationally connected with the first gear which is in meshing connection with the second gear, the third gear is fixedly arranged at the center of the second gear, the inner wall of the welding base is slidably connected with the toothed plate which is in meshing connection with the third gear, the end of the toothed plate is fixedly arranged with the first hydraulic push rod, the end of the first hydraulic push rod is fixedly connected with the supporting plate, and the hydraulic injection piece is in communication with the first hydraulic push rod through a hose.

[0010] Optionally, the diameter of the third gear is smaller than that of the second gear, the diameter of the third gear is equal to that of the first gear, the thread directions of the two segmented threaded rods are the same, and the rotation directions of the two first gears are the same.

[0011] Optionally, the deflector comprises a deflector rod, the top of the deflector rod is rotationally connected with the front plate, the side of the deflector rod and close to the end position is rotationally connected with a roller, the bottom of the hydraulic injection piece is fixedly arranged with a bottom plate, the top of the bottom plate is fixedly arranged with two guide rods which are symmetrically arranged between the top of the bottom plate and the front plate, and the bottom of the roller is in contact with the plate.

[0012] Optionally, the hydraulic injection piece is in communication with a second hydraulic push rod through a hose, the end of the second hydraulic push rod is fixedly arranged with a second toothed plate, the four corners of the supporting plate are threadedly connected with pitch change rods, the ends of the pitch change rods are in meshing connection with the second toothed plate through gears, the top ends of the pitch change rods are rotationally connected with the welding device, and the thread distance on the pitch change rod gradually shortens from bottom to top.

[0013] Optionally, an anti-adhesion part is provided between the bottom of the welding device and the support plate, and the anti-adhesion part includes a top plate. An airbag is fixedly installed between the top of the top plate and the welding device, and both ends of the airbag are connected to a ventilation hose, and an air outlet is fixedly installed at the end of the ventilation hose.

[0014] Optionally, two air outlets are provided, and the two air outlets are located in the middle of the welding base, and the weld between the two plates and the air outlets are on the same straight line.

[0015] Optionally, a center push plate is provided on the top of the welding base and on both sides of the plate, and a center push rod is fixedly installed between the side of the center push plate away from the plate and the welding base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adjusts the end height of the deflection member according to the thickness of the plate, thereby squeezing the hydraulic injection member, and then rotating the segmented threaded rod, adjusting the position of the threaded block, and the threaded block changes the position of the adjustment frame, so that adjacent hydraulic clamping rods are close to each other, and at the same time, the hydraulic clamping rods and clamping pads that are not on the top of the plate are moved to the top of the plate to supplement the clamping points and shorten the distance between adjacent clamping points. Deformation is controlled by more dense clamping points, and the number and spacing of the clamping points are automatically adjusted according to the thickness of the plate to avoid indentations on the surface of the plate caused by excessive clamping force at a single clamping point.

[0017] 2. The present invention adopts a design in which the pitch of the threads on the pitch changing rod is gradually shortened from bottom to top. As a result, the more the pitch changing rod is rotated, the slower the support plate rises. When clamping thicker plates, the initial distance between the plate and the clamping pad is shortened, and a greater clamping force can be applied to the plate more quickly, thereby improving processing efficiency.

[0018] 3. After welding is completed, the support plate of the present invention moves upward, and at the same time the hydraulic clamping rod extends further, so that the clamping pad continues to contact the plate, and the top plate moves upward to squeeze the airbag and cool the weld from the air outlet to avoid adhesion caused by the clamping pad clamping the plate. The weld has not cooled down, and the clamping pad moves upward to drive the plate to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the welding base of the present invention; Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle; Figure 4It is a structural schematic diagram of the point track of the present invention; Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B in the middle; Figure 6 It is a structural schematic diagram of the tooth plate of the present invention; Figure 7 It is a structural schematic diagram of the bottom plate of the present invention; Figure 8 Schematic diagram of the structure of the pitch changing rod of the present invention; Figure 9 Schematic diagram of the structure of the airbag of the present invention.

[0020] In the figure: 1. Welding base; 2. Conveying shaft; 3. Centering push plate; 4. Clamping point frame; 41. Support plate; 42. Point track; 43. Hydraulic clamping rod; 44. Clamping pad; 45. Adjustment frame; 46. Threaded block; 47. Segmented threaded rod; 48. First gear; 49. Second gear; 410. Third gear; 411. Tooth plate; 412. First hydraulic push rod; 5. Spacing adjustment part; 51. Front plate; 52. Deflection rod; 53. Roller; 54. Bottom plate; 55. Guide rod; 56. Hydraulic injection part; 57. Second hydraulic push rod; 58. Second tooth plate; 59. Pitch changing rod; 6. Anti-adhesion part; 61. Top plate; 62. Air bag; 63. Ventilation hose; 64. Air outlet; 7. Welding device; 8. Plate. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Embodiment one A multi-plate assembly welding tool, as shown in Figure 1 , comprising a welding base 1, a conveying shaft 2 is rotatably connected to the top of the welding base 1, two plates 8 are conveyed on the top of the conveying shaft 2, and a welding device 7 for welding the two plates 8 is fixedly installed in the middle of the welding base 1. A center pushing plate 3 is arranged on the top of the welding base 1 and located on both sides of the plate 8, and a center pushing rod is fixedly installed between the center pushing plate 3 away from the plate 8 and the welding base 1. The center pushing plate 3 centers the plate 8 for welding.

[0027] As shown in Figure 2 and Figure 4 , a clamping point rack 4 is arranged on the middle of the welding base 1 and close to the welding device 7, the clamping point rack 4 comprises a supporting plate 41, a plurality of point track 42 are opened on the top of the supporting plate 41, the inclination angle of each point track 42 is different, and a hydraulic clamping rod 43 is slidably connected in each point track 42, a clamping pad 44 is fixedly installed on the bottom of the hydraulic clamping rod 43, the hydraulic clamping rods 43 in the plurality of point tracks 42 are on the same straight line, and the spacing between the adjacent two hydraulic clamping rods 43 is equal.

[0028] As shown in Figure 5 , the position of the clamping pad 44 is adjusted by sliding the hydraulic clamping rod 43 in the point track 42, the bottom of the clamping pad 44 is in contact with the plate 8, thereby changing the clamping point position, the hydraulic clamping rods 43 in the plurality of point tracks 42 are on the same straight line, the spacing between the adjacent two hydraulic clamping rods 43 is equal, so that the clamping force of the clamping pad 44 when clamping the plate 8 is uniform.

[0029] The top of the support plate 41 is slidably connected to multiple adjustment frames 45 that frame the hydraulic clamping rods 43. The hydraulic clamping rods 43 slide along the adjustment frames 45. Both ends of the adjustment frames 45 are equipped with equidistant expansion components. These equidistant expansion components include threaded blocks 46 and segmented threaded rods 47. The threaded blocks 46 are arranged in multiple groups, each group containing two threaded blocks 46. The two threaded blocks 46 in a group are fixedly mounted at both ends of the adjustment frame 45. The inner walls of the two threaded blocks 46 in a group are threadedly connected to the segmented threaded rods 47. The threads on the segmented threaded rods 47 are divided into multiple segments, and the pitch of each segment gradually decreases from the end to the center. Transmission components are provided at the ends of the equidistant expansion components.

[0030] Each group of threaded blocks 46 is located on different threads of the segmented threaded rod 47, and the moving distance of each group of threaded blocks 46 is not equal. Starting from the threaded block 46 located at the center of the support plate 41, the moving distances of different groups of threaded blocks 46 are in a geometric progression. The spacing between each group of threaded blocks 46 after movement is equal, so that the clamping pads 44 are evenly distributed on the top of the plate 8. At the same time, the threaded blocks 46 drive the adjustment frame 45 to move. The adjustment frame 45 changes the position of the hydraulic clamping rod 43 while the hydraulic clamping rod 43 moves in the point track 42 to adjust the spacing between the hydraulic clamping rod 43 and the weld.

[0031] When welding thick plates, the weld metal contracts during cooling, generating significant weld stress. If the clamping point is too close to the weld, this restricts the weld's free contraction, causing stress concentration near the weld and increasing the likelihood of defects such as weld cracks. Placing the clamping point further away from the weld allows for more room for contraction, allowing for a more even distribution of weld stress. This reduces stress concentration and improves weld quality.

[0032] Thick plates have greater rigidity, but they will still deform under the action of welding heat. If the clamping point is too close to the weld, the plate 8 may generate large internal stress near the weld due to excessive local restraint. This internal stress will cause the plate 8 to deform when it is released after welding.

[0033] like Figure 7 As shown, a spacing adjustment member 5 is provided at the top of the welding base 1 and at the front end of the clamping point frame 4. The spacing adjustment member 5 includes a front plate 51, the bottom of which is fixedly mounted a hydraulic injection member 56. A deflector is rotatably provided at the bottom of the front plate 51. The top of the deflector is in rolling connection with the hydraulic injection member 56, which is connected to the transmission member via a hose. The welding device 7 moves to squeeze the deflector, causing the end of the deflector to move upward, thereby squeezing the hydraulic injection member 56 and forcing the hydraulic oil in the hydraulic injection member 56 into the transmission member.

[0034] like Figure 6 As shown, the transmission components include a first gear 48, a second gear 49, a third gear 410, a toothed plate 411, and a first hydraulic push rod 412. The third gear 410 rotates at the end of the second gear 49. The end of the support plate 41 is rotatably connected to the first gear 48 meshing with the second gear 49. The third gear 410 is fixedly mounted at the center of the second gear 49. The inner wall of the welding base 1 is slidably connected to the toothed plate 411 meshing with the third gear 410. The end of the toothed plate 411 is fixedly mounted with the first hydraulic push rod 412. The end of the first hydraulic push rod 412 is fixedly connected to the support plate 41. The hydraulic injection member 56 is connected to the first hydraulic push rod 412 via a hose. The diameter of the third gear 410 is smaller than that of the second gear 49. The diameter of the third gear 410 is equal to the diameter of the first gear 48. The thread directions of the two segmented threaded rods 47 are the same, and the two first gears 48 rotate in the same direction. After the hydraulic oil in the hydraulic injection piece 56 enters the first hydraulic push rod 412 and extends the first hydraulic push rod 412, the toothed plate 411 drives the third gear 410 to rotate, causing the first gear 48 and the segmented threaded rod 47 to rotate, adjusting the position of the threaded block 46, that is, adjusting the position of the hydraulic clamping rod 43. Through the diameter ratio of the first gear 48, the second gear 49 and the third gear 410, when the third gear 410 rotates one circle, the first gear 48 rotates several circles.

[0035] When welding the plate 8, the end of the deflector is raised to squeeze the hydraulic injection part 56, so that the hydraulic oil enters the first hydraulic push rod 412, thereby rotating the first gear 48 and the segmented threaded rod 47, adjusting the position of the threaded block 46, and the threaded block 46 changes the position of the adjustment frame 45, so that the adjacent hydraulic clamping rods 43 are close, and at the same time, the hydraulic clamping rods 43 and the clamping pad 44 that are not at the top of the plate 8 are moved to the top of the plate 8 to supplement the clamping points.

[0036] The adjustment frame 45 drives the hydraulic clamping rod 43 to move while the hydraulic clamping rod 43 moves along the point track 42, thereby extending the distance between the hydraulic clamping rod 43, the clamping pad 44 and the weld, avoiding that the thick plate will still undergo certain deformation under the action of welding heat. In the case that the clamping point is too close to the weld, the local constraint may be too strong, causing the plate 8 to generate large internal stress near the weld. When the internal stress is released after welding, it will cause the plate 8 to deform.

[0037] In this embodiment, the end height of the deflection member is adjusted by the thickness of the plate 8, so that the hydraulic injection member 56 is squeezed, and then the segmented threaded rod 47 is rotated, the position of the threaded block 46 is adjusted, and the threaded block 46 changes the position of the adjustment frame 45, so that the adjacent hydraulic clamping rods 43 are close, and the hydraulic clamping rods 43 and the clamping pads 44 that are not at the top of the plate 8 are moved to the top of the plate 8 to supplement the clamping points and shorten the distance between adjacent clamping points. The deformation is controlled by more dense clamping points, and the number and spacing of the clamping points are automatically adjusted according to the thickness of the plate 8 to avoid excessive clamping force at a single clamping point, which may cause indentations on the surface of the plate 8.

[0038] Example 2 Based on the first embodiment, Figure 7 and Figure 8 As shown, the deflection member includes a deflection rod 52, the top of the deflection rod 52 is rotatably connected to the front plate 51, the side of the deflection rod 52 and near the end position is rotatably connected to a roller 53, the bottom of the hydraulic injection member 56 is fixedly installed with a bottom plate 54, the top of the roller 53 is in contact with the bottom plate 54, two symmetrically arranged guide rods 55 are fixedly installed between the top of the bottom plate 54 and the front plate 51, and the bottom of the roller 53 is in contact with the plate 8.

[0039] like Figure 8 As shown, the hydraulic injection component 56 is connected to the second hydraulic push rod 57 through a hose, and the end of the second hydraulic push rod 57 is fixedly installed with a second gear plate 58. The four corners of the support plate 41 are all threadedly connected with a pitch changing rod 59. The end of the pitch changing rod 59 is meshed with the second gear plate 58 through a gear, and the top of the pitch changing rod 59 is rotatably connected to the welding device 7.

[0040] The plate 8 contacts the roller 53 and moves the roller 53, thereby causing the deflection rod 52 to rotate, and the deflection rod 52 drives the roller 53 to rotate. The roller 53 squeezes the bottom plate 54, so that the hydraulic oil in the hydraulic injection part 56 enters the first hydraulic push rod 412 and the second hydraulic push rod 57. After the hydraulic oil enters the second hydraulic push rod 57, its end extends out, and the second hydraulic push rod 57 uses the second tooth plate 58 to drive the pitch changing rod 59 to rotate. The pitch changing rod 59 moves the support plate 41 upward to adjust the distance between the clamping pad 44 and the plate 8.

[0041] The thread pitch on the pitch changing rod 59 gradually shortens from bottom to top. The rotation of the pitch changing rod 59 gradually shortens the rising distance of the support plate 41, continuously shortening the distance between the clamping pad 44 and the plate 8. For thicker plates 8, a greater clamping force is required. Shortening the initial distance between the plate 8 and the clamping pad 44 can apply a greater clamping force to the plate 8 more quickly, thereby improving processing efficiency.

[0042] In this embodiment, the pitch of the threads on the pitch changing rod 59 is designed to gradually shorten from bottom to top, so that the more the pitch changing rod 59 rotates, the slower the support plate 41 rises. When clamping a thicker plate 8, the initial distance between the plate 8 and the clamping pad 44 is reduced, and a greater clamping force can be applied to the plate 8 more quickly, thereby improving processing efficiency.

[0043] Example 3 Based on the above embodiment 1 or 2, if Figure 3 and Figure 9 As shown, an anti-adhesion part 6 is provided between the bottom of the welding device 7 and the support plate 41. The anti-adhesion part 6 includes a top plate 61. An airbag 62 is fixedly installed between the top of the top plate 61 and the welding device 7. Both ends of the airbag 62 are connected to a ventilation hose 63, and an air outlet 64 is fixedly installed at the end of the ventilation hose 63.

[0044] When clamping the plate 8, the support plate 41 moves downward to enter the clamping state, and the support plate 41 drives the top plate 61 to move, so that the airbag 62 expands to inhale air. After welding is completed, the support plate 41 moves upward and the hydraulic clamping rod 43 is further extended.

[0045] There are two air outlets 64, which are located in the middle of the welding base 1. The weld between the two plates 8 is aligned with the air outlets 64. The gas in the airbag 62 is ejected from the air outlets 64 to cool the weld between the two plates 8.

[0046] In this embodiment, after welding is completed, the support plate 41 moves upward, and at the same time the hydraulic clamping rod 43 extends further, so that the clamping pad 44 continues to contact the plate 8, and the top plate 61 moves upward to squeeze the airbag 62, and cool the weld from the air outlet 64 to avoid adhesion caused by the clamping pad 44 clamping the plate 8. The weld has not cooled down, and the clamping pad 44 moves upward to drive the plate 8 to move.

[0047] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A multi-plate assembly welding tool, comprising a welding base (1), wherein the top of the welding base (1) is rotatably connected to a conveying shaft (2), and the top of the conveying shaft (2) conveys two plates (8), characterized in that: A clamping point frame (4), the clamping point frame (4) comprises a support plate (41), a plurality of point rails (42) are provided on the top of the support plate (41), the inclination angle of each point rail (42) is different, a hydraulic clamping rod (43) is slidably connected in each point rail (42), a clamping pad (44) is fixedly installed at the bottom of the hydraulic clamping rod (43), a plurality of adjustment frames (45) for framing the hydraulic clamping rod (43) are slidably connected to the top of the support plate (41), two sections of the adjustment frame (45) are provided with equidistant expansion parts, and the ends of the equidistant expansion parts are provided with transmission parts; A spacing adjustment member (5), the spacing adjustment member (5) comprising a front plate (51), a hydraulic injection member (56) being fixedly mounted on the bottom of the front plate (51), a deflection member being rotatably provided on the bottom of the front plate (51), and a top of the deflection member being rollingly connected to the hydraulic injection member (56); The hydraulic injection member (56) is connected to the transmission member via a hose, and the bottom of the clamping pad (44) is in contact with the plate (8).

2. The multi-board assembly welding tool according to claim 1, characterized in that: The hydraulic clamping rods (43) in the plurality of point tracks (42) are all on the same straight line, the spacing between two adjacent hydraulic clamping rods (43) is equal, and the hydraulic clamping rods (43) slide along the adjustment frame (45).

3. The multi-board assembly welding tool according to claim 2, characterized in that: The equidistant expansion member includes a threaded block (46) and a segmented threaded rod (47). The threaded blocks (46) are arranged in multiple groups, with two threaded blocks (46) in one group. The two threaded blocks (46) in one group are fixedly mounted at both ends of the adjustment frame (45). The inner walls of the two threaded blocks (46) in one group are threadedly connected to the segmented threaded rod (47). The threads on the segmented threaded rod (47) are divided into multiple sections, and the thread pitch of each section of the thread gradually shortens from the end to the center.

4. The multi-board assembly welding tool according to claim 3, characterized in that: The transmission member includes a first gear (48), a second gear (49), a third gear (410), a tooth plate (411) and a first hydraulic push rod (412), wherein the third gear (410) rotates at the end of the second gear (49), the end of the support plate (41) is rotatably connected to the first gear (48) meshed with the second gear (49), the third gear (410) is fixedly installed at the center of the second gear (49), the inner wall of the welding base (1) is slidably connected to the tooth plate (411) meshed with the third gear (410), the end of the tooth plate (411) is fixedly installed with the first hydraulic push rod (412), the end of the first hydraulic push rod (412) is fixedly connected to the support plate (41), and the hydraulic injection member (56) is communicated with the first hydraulic push rod (412) through a hose.

5. The multi-board assembly welding tool according to claim 4, characterized in that: The diameter of the third gear (410) is smaller than that of the second gear (49), and the diameter of the third gear (410) is equal to the diameter of the first gear (48). The thread directions of the two segmented threaded rods (47) are the same, and the rotation directions of the two first gears (48) are the same.

6. The multi-board assembly welding tool according to claim 5, characterized in that: The deflection member includes a deflection rod (52), the top of the deflection rod (52) is rotatably connected to the front plate (51), the side of the deflection rod (52) and near the end position are rotatably connected to a roller (53), the bottom of the hydraulic injection member (56) is fixedly mounted with a bottom plate (54), the top of the roller (53) is in contact with the bottom plate (54), two symmetrically arranged guide rods (55) are fixedly mounted between the top of the bottom plate (54) and the front plate (51), and the bottom of the roller (53) is in contact with the plate (8).

7. The multi-board assembly welding tool according to claim 6, characterized in that: The hydraulic injection member (56) is connected to a second hydraulic push rod (57) through a hose. The end of the second hydraulic push rod (57) is fixedly mounted with a second tooth plate (58). The four corners of the support plate (41) are all threadedly connected with a pitch changing rod (59). The end of the pitch changing rod (59) is meshed and connected with the second tooth plate (58) through a gear. The top end of the pitch changing rod (59) is rotatably connected to the welding device (7). The thread pitch on the pitch changing rod (59) gradually shortens from bottom to top.

8. The multi-board assembly welding tool according to claim 7, characterized in that: An anti-adhesion member (6) is provided between the bottom of the welding device (7) and the support plate (41), and the anti-adhesion member (6) includes a top plate (61). An air bag (62) is fixedly installed between the top of the top plate (61) and the welding device (7), and both ends of the air bag (62) are connected to a ventilation hose (63), and an air outlet (64) is fixedly installed at the end of the ventilation hose (63).

9. The multi-board assembly welding tool according to claim 8, characterized in that: Two air outlets (64) are provided, and the two air outlets (64) are located in the middle of the welding base (1), and the weld between the two plates (8) and the air outlets (64) are located on the same straight line.

10. The multi-board assembly and welding tool according to claim 1, characterized in that: A center push plate (3) is provided on the top of the welding base (1) and on both sides of the plate (8), a center push rod is fixedly installed between the side of the center push plate (3) away from the plate (8) and the welding base (1), and a welding device (7) for welding two plates (8) is fixedly installed in the middle of the welding base (1).

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