Aluminum alloy welding hot crack restraining device adopting preheating structure

Abstract

The aluminum alloy welding hot crack restraining device adopting the preheating structure is applied to the technical field of aluminum alloy welding, a lifting structure is arranged to be matched with a rotating shaft, a guiding piece and a cantilever, and according to the shape of a weldment and the position of a welding seam, the lifting structure is matched with adjustment among the rotating shaft, the guiding piece and the cantilever; the position and angle of the preheating assembly can be adjusted, it is ensured that the preheating assembly makes good contact with the surface of a weldment, and therefore the preheating effect is improved, through the arranged preheating assembly, a weld joint, needing to be welded, of the weldment can be evenly and efficiently preheated before aluminum alloy welding, and therefore the efficient, stable and accurate effects are achieved in the weldment preheating process, and the welding quality is improved. And the welding quality of the aluminum alloy weldment is effectively improved, the generation of defects such as hot cracks is inhibited, and the welding quality of the aluminum alloy is effectively ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy welding, and in particular relates to an aluminum alloy welding thermal crack suppression device using a preheating structure. Background Art

[0002] Aluminum alloy materials have the characteristics of light weight, high specific strength and easy processing. They are widely used in the fields of shipbuilding and aerospace. However, the welding process of aluminum alloy materials is always accompanied by a series of problems such as porosity, deformation, cracking, etc. Especially during welding, the weldment will undergo a rapid heating and cooling process. Due to the large thermal expansion coefficient, it will produce a large expansion when heated and a more obvious contraction when cooled, resulting in a large welding stress. When the stress exceeds the strength limit of the material, thermal cracks are likely to occur, which seriously affects the strength, rigidity and working stability of the welded components, thereby limiting the application of aluminum alloy welded structures.

[0003] In the aluminum alloy welding process, preheating before welding is crucial to reducing thermal cracks and improving welding quality. However, the traditional preheating method is mainly through flame burning, which often has disadvantages such as inaccurate temperature control, uneven heating, and low efficiency, resulting in unstable welding quality. The thermal cracks generated during the welding process are difficult to effectively suppress.

[0004] Combining the above-mentioned problem points, it can be found that it is difficult to avoid the above-mentioned problems when the existing aluminum alloy preheating methods on the market are used, thus failing to achieve the desired effect. Therefore, we propose an aluminum alloy welding thermal crack suppression device with a preheating structure, which can achieve efficient and accurate preheating, effectively suppress the occurrence of welding thermal cracks, and improve the welding quality. Summary of the invention

[0005] The purpose of the present invention is to target an existing aluminum alloy welding thermal crack suppression device using a preheating structure. The device has the advantage that a lifting structure is provided to cooperate with a rotating shaft, a guide and a cantilever. The position and angle of the preheating component can be adjusted according to the shape of the weldment and the position of the weld seam through the adjustment between the lifting structure and the rotating shaft, the guide and the cantilever, thereby ensuring that the preheating component is in good contact with the surface of the weldment, thereby improving the preheating effect. The preheating component provided can evenly and efficiently preheat the weld seam to be welded of the weldment before aluminum alloy welding, thereby playing an efficient, stable and precise role in the preheating process of the weldment, effectively improving the welding quality of the aluminum alloy weldment, suppressing the occurrence of defects such as thermal cracks, and effectively ensuring the welding quality of the aluminum alloy.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an aluminum alloy welding thermal crack suppression device using a preheating structure, comprising a base, brackets are bolted to both sides of the top of the base, and a support plate is bolted to the top between the two opposite sides of the two brackets, a lifting structure is slidably arranged between the two opposite sides of the two brackets, the top of the lifting structure extends to the top of the support plate, and the bottom of the lifting structure is bolted to the preheating structure;

[0007] The preheating structure includes two support plates, and a rotating shaft is rotatably connected between the opposite sides of the two support plates. A cantilever is welded on the front side of the rotating shaft, and a preheating component is bolted on the front side of the cantilever. A guide is bolted on the front side of the lifting structure, and the guide is used in conjunction with the cantilever.

[0008] By adopting the above technical scheme, by setting a lifting structure in coordination with the rotating shaft, the guide and the cantilever, the position and angle of the preheating assembly can be adjusted according to the shape of the weldment and the position of the weld seam through the adjustment between the lifting structure in coordination with the rotating shaft, the guide and the cantilever, thereby ensuring good contact between the preheating assembly and the surface of the weldment, thereby improving the preheating effect; and through the set preheating assembly, the weld seam to be welded of the weldment can be uniformly and efficiently preheated before aluminum alloy welding, thereby playing an efficient, stable and precise role in the preheating process of the weldment, effectively improving the welding quality of aluminum alloy weldments, suppressing the occurrence of defects such as thermal cracks, and effectively ensuring the welding quality of aluminum alloys.

[0009] The present invention is further configured as follows: the preheating assembly includes a fixing frame, the fixing frame is bolted to the front side of the cantilever, and a connecting shaft is arranged inside the fixing frame, a connecting plate is sleeved on the surface of the connecting shaft, a fixing ring is bolted to the bottom of the connecting plate, and mounting plates are arranged on both sides of the fixing ring, preheating plates are arranged on the opposite sides of the two mounting plates, and reflective films are arranged on the top and bottom of the preheating plates, the reflective film is connected to the mounting plate on one side thereof, a first screw is rotatably connected to the side of the mounting plate on the inner wall of the fixing ring, and a first screw sleeve is threadedly connected to the surface of the first screw.

[0010] By adopting the above technical scheme, a preheating assembly is set up, and through the cooperation between the fixing frame, the connecting shaft and the connecting plate, the up and down pitch angles of the preheating assembly can be flexibly adjusted, and the use direction of the fixing ring can be adjusted, so that the preheating assembly has flexibility in use, and through the threaded cooperation between the first screw and the first screw sleeve, the distance between the two mounting plates can be adjusted, so that it can adapt to aluminum alloy welds within a certain range, reducing the limitation of use, and through the use of the preheating plate and the reflective film, the reflective film shell is used to gather the heat generated by the preheating plate on the surface of the weldment, so that the heat is concentrated, which can achieve the effect of uniform and efficient preheating.

[0011] The present invention is further configured as follows: the preheating plate includes a ceramic heating plate, the ceramic heating plate is connected to the mounting plate on one side close to the mounting plate, a plurality of mounting grooves are provided inside the ceramic heating plate on the side away from the mounting plate, resistance wires and thermocouple sensors are respectively provided inside the mounting grooves, and the resistance wires and thermocouple sensors are arranged at intervals.

[0012] By adopting the above technical solution, a preheating plate is set up and the resistance wire is evenly embedded in the installation groove, which can ensure the uniformity of heat generation and avoid local overheating or uneven temperature. In combination with the ceramic heating plate, the heat can be evenly guided to the surface of the weldment. At the same time, the evenly set thermocouple sensors can accurately capture the temperature changes in the preheating area, providing accurate data for precise temperature control.

[0013] The present invention is further configured as follows: the first screw sleeve is located inside the fixing ring, and the first screw rod extends to the outside of the fixing ring from a side away from the mounting plate, and two telescopic rods are bolted between the mounting plate and the inner wall of the fixing ring.

[0014] By adopting the above technical solution and arranging the telescopic rod, the moving track of the installation plate and the moving plate can be limited.

[0015] The present invention is further configured as follows: the connecting shaft includes a shaft rod, the shaft rod is located inside the fixing frame, and the connecting plate is rotatably sleeved on the surface of the shaft rod, the two sides of the shaft rod surface are respectively sleeved with shaft sleeves and positioning plates, the side of the positioning plate close to the connecting plate is in close contact with it, a positioning spring is annularly bolted between the shaft sleeve and the opposite side of the positioning plate, and check rings are sleeved on both sides of the shaft rod surface, and the side of the check ring close to the shaft sleeve is in close contact with it.

[0016] By adopting the above technical solution, by setting a connecting shaft, the rotational connection between the connecting plate and the fixed frame can be realized through the shaft rod, and the elasticity of the positioning spring can be used to make the positioning plate and the connecting plate fit tightly, so that there is a certain resistance in the position of the connecting plate after rotation, so that the position of the fixing ring can have a hovering effect, which is convenient for adjusting the use angle and orientation of the fixing ring.

[0017] The present invention is further configured as follows: the cantilever includes a fixed sleeve, the rear side of the fixed sleeve is connected to the rotating shaft, and the interior of the fixed sleeve is slidably connected with a toothed plate, the front side of the toothed plate is bolted with an extension plate, the extension plate is bolted to the fixed frame, the left side of the toothed plate is meshingly connected with a gear, and an output shaft is arranged inside the gear, two limit plates are sleeved on the surface of the output shaft, and the right side of the limit plate is bolted to the fixed sleeve.

[0018] By adopting the above technical solution, by setting a cantilever, the gear can be driven to rotate through the output shaft, and the gear and the toothed plate are engaged to move the toothed plate inside the fixed sleeve. Therefore, the extension plate can be adjusted to meet different working distance requirements, thereby further improving the flexibility of the preheating component.

[0019] The present invention is further configured as follows: a synchronous disk is sleeved on the top of the output shaft surface, and a limiting rod passes through the interior of the top limiting plate, the bottom of the limiting rod extends to the interior of the synchronous disk, and the top of the synchronous disk is provided with a plurality of limiting grooves in an annular shape for use with the limiting rod.

[0020] By adopting the above technical solution, by setting a synchronization disk and a limit rod, and by using the two in coordination, the extension plate can be locked in position to prevent its random movement from affecting the normal use of the preheating component.

[0021] The present invention is further configured as follows: the guide member includes an arc-shaped plate, the arc-shaped plate is bolted to the front side of the lifting structure, and a stud penetrates the interior of the arc-shaped plate, the bottom of the stud is rotatably connected to the fixing sleeve, the top of the stud surface is threadedly connected to a locking nut, and the bottom of the locking nut is in close contact with the arc-shaped plate.

[0022] By adopting the above technical solution, a guide is set up, and the stud moves inside the arc plate, which can synchronously drive the cantilever to move, thereby adjusting the use position of the cantilever and the preheating component, and locking the position of the stud by a locking nut, the preheating component can be adjusted to the left and right swing angle, thereby improving the use flexibility of the preheating component.

[0023] The present invention is further configured as follows: an arc-shaped hole is opened inside the arc-shaped plate, and the stud passes through the inside of the arc-shaped hole.

[0024] By adopting the above technical solution and providing the arc-shaped hole, the moving track of the stud can be restricted.

[0025] The present invention is further configured as follows: the lifting structure includes a second screw sleeve, the second screw sleeve is arranged inside the support plate, and the internal thread of the second screw sleeve passes through a second screw rod, the bottom of the second screw rod is connected to a movable plate through a bearing, the bottom of the movable plate is connected to the support plate, guide rods are bolted on both sides of the top of the movable plate, and the top of the guide rods extends to the top of the support plate.

[0026] By adopting the above technical solution and setting up a lifting structure, the second screw can be moved up and down through the cooperation of the thread of the second screw and the second screw sleeve, and the movable plate can be driven to move synchronously, and the moving trajectory of the movable plate can be limited by the guide rod, so that the use height of the preheating structure can be adjusted under the movement of the movable plate.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. By setting a lifting structure in conjunction with a rotating shaft, a guide and a cantilever, the position and angle of the preheating component can be adjusted according to the shape of the weldment and the position of the weld seam, through the adjustment between the lifting structure in conjunction with the rotating shaft, the guide and the cantilever, to ensure that the preheating component is in good contact with the weldment surface, thereby improving the preheating effect;

[0029] 2. By setting up the preheating component, the welds to be welded can be evenly and efficiently preheated before aluminum alloy welding, thereby playing an efficient, stable and precise role in the preheating process of the weld, effectively improving the welding quality of aluminum alloy weldments, inhibiting the occurrence of defects such as thermal cracks, and effectively ensuring the welding quality of aluminum alloys. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the preheating component of the present invention;

[0032] Figure 3 It is a front view structural schematic diagram of the preheating plate of the present invention;

[0033] Figure 4 It is a schematic diagram of the connecting shaft structure of the present invention;

[0034] Figure 5 It is a schematic diagram of the connection between the guide member and the cantilever of the present invention;

[0035] Figure 6 It is a schematic diagram of the cantilever structure of the present invention;

[0036] Figure 7 The present invention Figure 6 Enlarged schematic diagram at point A in the middle.

[0037] Figure numerals: 1, base; 2, bracket; 3, support plate; 4, lifting structure; 41, second screw sleeve; 42, second screw rod; 43, moving plate; 44, guide rod; 5, preheating structure; 51, support plate; 52, rotating shaft; 53, cantilever; 531, fixed sleeve; 532, tooth plate; 533, extension plate; 534, gear; 535, output shaft; 536, limit plate; 54, preheating assembly; 541, fixed frame; 542, connecting shaft; 5421, shaft rod; 5422, sleeve; 5423, positioning Plate; 5424, positioning spring; 5425, check ring; 543, connecting plate; 544, fixing ring; 545, mounting plate; 546, preheating plate; 5461, ceramic heating plate; 5462, mounting groove; 5463, resistance wire; 5464, thermocouple sensor; 547, reflecting film; 548, first screw; 549, first screw sleeve; 55, guide; 551, arc plate; 552, stud; 553, locking nut; 6, telescopic rod; 7, synchronous disk; 8, limit rod; 9, arc hole. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0039] refer to Figure 1-7 , an aluminum alloy welding thermal crack suppression device using a preheating structure, comprising a base 1, brackets 2 are bolted to both sides of the top of the base 1, and a support plate 3 is bolted to the top between the two opposite sides of the two brackets 2, a lifting structure 4 is slidably arranged between the two opposite sides of the two brackets 2, the top of the lifting structure 4 extends to the top of the support plate 3, and a preheating structure 5 is bolted to the bottom of the lifting structure 4;

[0040] The preheating structure 5 includes two support plates 51, and a rotating shaft 52 is rotatably connected between the opposite sides of the two support plates 51, a cantilever 53 is welded on the front side of the rotating shaft 52, and a preheating assembly 54 is bolted on the front side of the cantilever 53, and a guide 55 is bolted on the front side of the lifting structure 4, and the guide 55 is used in conjunction with the cantilever 53. By setting the lifting structure 4 to cooperate with the rotating shaft 52, the guide 55 and the cantilever 53, the position and angle of the preheating assembly 54 can be adjusted according to the shape of the weldment and the position of the weld seam through the adjustment between the lifting structure 4 and the rotating shaft 52, the guide 55 and the cantilever 53, ensuring that the preheating assembly 54 is in good contact with the surface of the weldment, thereby improving the preheating effect, and through the preheating assembly 54, the weld seam to be welded of the weldment can be uniformly and efficiently preheated before aluminum alloy welding, thereby playing an efficient, stable and precise role in the preheating process of the weldment, effectively improving the welding quality of the aluminum alloy weldment, suppressing the generation of defects such as thermal cracks, and effectively ensuring the welding quality of the aluminum alloy.

[0041] like Figure 2As shown, the preheating assembly 54 includes a fixing frame 541, which is bolted to the front side of the cantilever 53, and a connecting shaft 542 is arranged inside the fixing frame 541, a connecting plate 543 is sleeved on the surface of the connecting shaft 542, a fixing ring 544 is bolted to the bottom of the connecting plate 543, and mounting plates 545 are arranged on both sides of the fixing ring 544, preheating plates 546 are arranged on the opposite sides of the two mounting plates 545, and a reflecting film 547 is arranged on the top and bottom of the preheating plate 546, and the reflecting film 547 is connected to the mounting plate 545 on one side thereof, and a first screw 548 is rotatably connected to the mounting plate 545 on one side thereof close to the inner wall of the fixing ring 544, and a first screw 548 is threadedly connected to the surface of the first screw 548. The sleeve 549 is provided with the preheating component 54. Through the cooperation between the fixing frame 541, the connecting shaft 542 and the connecting plate 543, the up and down pitch angles of the preheating component 54 can be flexibly adjusted, and the use direction of the fixing ring 544 can be adjusted, so that the preheating component 54 has flexibility in use. Through the threaded cooperation between the first screw rod 548 and the first screw sleeve 549, the distance between the two mounting plates 545 can be adjusted, so that it can adapt to aluminum alloy weldments within a certain range, reducing the limitation of use. Through the use of the preheating plate 546 and the reflecting film 547, the heat generated by the preheating plate 546 is gathered on the surface of the weldment by using the reflecting film 547 shell, so that the heat is concentrated, which can achieve the effect of uniform and efficient preheating.

[0042] like Figure 3 As shown, the preheating plate 546 includes a ceramic heating plate 5461, which is connected to the mounting plate 545 on one side thereof, and a plurality of mounting grooves 5462 are provided inside the ceramic heating plate 5461 on the side away from the mounting plate 545, and resistance wires 5463 and thermocouple sensors 5464 are respectively provided inside the mounting grooves 5462, and the resistance wires 5463 and the thermocouple sensors 5464 are arranged at intervals. By arranging the preheating plate 546, the resistance wires 5463 are evenly embedded in the mounting grooves 5462, so that the uniformity of heat generation can be ensured, and local overheating or uneven temperature can be avoided. In combination with the ceramic heating plate 5461, the heat can be evenly guided to the surface of the weldment, and at the same time, the evenly arranged thermocouple sensors 5464 can accurately capture the temperature changes in the preheating area, and provide accurate data for precise temperature control.

[0043] like Figure 2 As shown, the first screw sleeve 549 is located inside the fixed ring 544, and the first screw rod 548 extends to the outside of the fixed ring 544 away from the side of the mounting plate 545, and two telescopic rods 6 are bolted between the mounting plate 545 and the inner wall of the fixed ring 544. By setting the telescopic rods 6, the moving plate 43 of the mounting plate 545 can be limited to its moving trajectory.

[0044] like Figure 4As shown, the connecting shaft 542 includes a shaft rod 5421, the shaft rod 5421 is located inside the fixing frame 541, and the connecting plate 543 is rotatably sleeved on the surface of the shaft rod 5421, and the shaft sleeve 5422 and the positioning plate 5423 are sleeved on both sides of the surface of the shaft rod 5421, and the side of the positioning plate 5423 close to the connecting plate 543 is in close contact with it, and a positioning spring 5424 is annularly bolted between the shaft sleeve 5422 and the opposite side of the positioning plate 5423, and the two sides of the surface of the shaft rod 5421 are sleeved with a check ring 5422. 425, and the side of the check ring 5425 close to the shaft sleeve 5422 is in close contact with it. By setting the connecting shaft 542, the connecting plate 543 and the fixing frame 541 can be rotatably connected through the shaft rod 5421, and the elasticity of the positioning spring 5424 can be used to make the positioning plate 5423 and the connecting plate 543 fit closely, so that there is a certain resistance in the position of the connecting plate 543 after rotation, so that the position of the fixing ring 544 can have a hovering effect, which is convenient for adjusting the use angle and orientation of the fixing ring 544.

[0045] like Figure 5 and Figure 6 As shown, the cantilever 53 includes a fixed sleeve 531, the rear side of the fixed sleeve 531 is connected to the rotating shaft 52, and the fixed sleeve 531 is internally slidably connected with a tooth plate 532, the front side of the tooth plate 532 is bolted with an extension plate 533, the extension plate 533 is bolted to the fixed frame 541, the left side of the tooth plate 532 is meshingly connected with a gear 534, and the inside of the gear 534 is provided with an output shaft 535, the surface of the output shaft 535 is sleeved with two limit plates 536, and the right side of the limit plate 536 is bolted to the fixed sleeve 531. By setting the cantilever 53, the gear 534 can be driven to rotate by the output shaft 535, and the tooth plate 532 can be moved inside the fixed sleeve 531 by utilizing the meshing connection between the gear 534 and the tooth plate 532. Therefore, the extension plate 533 can be adjusted to meet different working distance requirements, thereby further improving the flexibility of use of the preheating component 54.

[0046] like Figure 7 As shown, a synchronous disk 7 is sleeved on the top of the surface of the output shaft 535, and a limiting rod 8 runs through the interior of the top limiting plate 536, the bottom of the limiting rod 8 extends to the interior of the synchronous disk 7, and a plurality of limiting grooves used in conjunction with the limiting rod 8 are provided in a ring shape on the top of the synchronous disk 7. By setting the synchronous disk 7 and the limiting rod 8 and using them in conjunction with each other, the extension plate 533 can be locked in position to prevent it from moving at will and affecting the normal use of the preheating component 54.

[0047] like Figure 5As shown, the guide member 55 includes an arc-shaped plate 551, which is bolted to the front side of the lifting structure 4, and a stud 552 runs through the interior of the arc-shaped plate 551, the bottom of the stud 552 is rotatably connected to the fixing sleeve 531, and the top of the surface of the stud 552 is threadedly connected to a locking nut 553, and the bottom of the locking nut 553 is in close contact with the arc-shaped plate 551. By setting the guide member 55, the stud 552 moves inside the arc-shaped plate 551, which can synchronously drive the cantilever 53 to move, thereby adjusting the use position of the cantilever 53 and the preheating component 54, and the position of the stud 552 is locked by the locking nut 553, so that the preheating component 54 can be adjusted to the left and right swing angle, thereby improving the use flexibility of the preheating component 54.

[0048] like Figure 5 As shown, an arc-shaped hole 9 is opened inside the arc-shaped plate 551, and the stud 552 passes through the arc-shaped hole 9. By providing the arc-shaped hole 9, the moving trajectory of the stud 552 can be limited.

[0049] like Figure 1 As shown, the lifting structure 4 includes a second screw sleeve 41, which is arranged inside the support plate 3, and the internal thread of the second screw sleeve 41 passes through a second screw rod 42, the bottom of the second screw rod 42 is connected to a movable plate 43 through a bearing, the bottom of the movable plate 43 is connected to the support plate 51, and both sides of the top of the movable plate 43 are bolted with guide rods 44, and the top of the guide rods 44 extends to the top of the support plate 3. By setting the lifting structure 4, the second screw rod 42 can be moved up and down by the thread cooperation of the second screw rod 42 and the second screw sleeve 41, and the movable plate 43 can be moved synchronously, and the moving trajectory of the movable plate 43 is limited by the guide rod 44, so that the use height of the preheating structure 5 can be adjusted under the movement of the movable plate 43.

[0050] A brief description of the use process: first adjust the use angle and orientation of the preheating component 54 according to the welding requirements, and first, through the thread cooperation of the second screw 42 and the second screw sleeve 41, the second screw 42 can be moved up and down, and the movable plate 43 can be driven to move synchronously, and the moving trajectory of the movable plate 43 can be limited by the guide rod 44, so that the use height of the preheating component 54 can be adjusted under the movement of the movable plate 43, and the stud 552 is moved in the arc hole 9 in the arc plate 551, so that the fixed sleeve 531 can be rotated with the rotating shaft 52 as the fulcrum, and the preheating component 54 is adjusted again, and the position of the stud 552 is locked with the locking nut 553, and then the gear 534 is driven to rotate through the output shaft 535, and the gear 534 is meshed with the tooth plate 532 to move the tooth plate 532 inside the fixed sleeve 531, so that the extension plate 533 can be adjusted to adapt to different The same working distance requirements are met, and the position of the extension plate 533 is locked by the cooperation of the fixed disk and the limit rod 8. Subsequently, the up and down pitch angles of the preheating assembly 54 can be flexibly adjusted, and the use direction of the fixing ring 544 can be adjusted through the cooperation between the fixing frame 541, the connecting shaft 542 and the connecting plate 543. The threaded cooperation between the first screw 548 and the first screw sleeve 549 can adjust the distance between the two mounting plates 545, so as to adapt to aluminum alloy weldments within a certain range. Finally, the welding part of the aluminum alloy weldment is placed between the two preheating plates 546. The uniform use of the resistance wire 5463 and the reflective film 547 can ensure the uniformity of heat generation, and the ceramic heating plate 5461 can be used to evenly guide the heat on the surface of the weldment. At the same time, the evenly arranged thermocouple sensors 5464 can accurately capture the temperature changes in the preheating area, providing accurate data for precise temperature control.

[0051] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A device for suppressing thermal cracks in aluminum alloy welding using a preheating structure, comprising a base (1), characterized in that: The two sides of the top of the base (1) are bolted with brackets (2), and the top between the two opposite sides of the brackets (2) is bolted with a support plate (3), and a lifting structure (4) is slidably arranged between the two opposite sides of the brackets (2), the top of the lifting structure (4) extends to the top of the support plate (3), and the bottom of the lifting structure (4) is bolted with a preheating structure (5); The preheating structure (5) comprises two support plates (51), and a rotating shaft (52) is rotatably connected between opposite sides of the two support plates (51), a cantilever (53) is welded to the front side of the rotating shaft (52), and a preheating component (54) is bolted to the front side of the cantilever (53), and a guide member (55) is bolted to the front side of the lifting structure (4), and the guide member (55) is used in conjunction with the cantilever (53).

2. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 1 is characterized in that: The preheating assembly (54) comprises a fixing frame (541), wherein the fixing frame (541) is bolted to the front side of the cantilever (53), and a connecting shaft (542) is arranged inside the fixing frame (541), a connecting plate (543) is sleeved on the surface of the connecting shaft (542), a fixing ring (544) is bolted to the bottom of the connecting plate (543), and mounting plates (545) are arranged on both sides of the fixing ring (544), and preheating plates (546) are arranged on the opposite sides of the two mounting plates (545), and a reflecting film (547) is arranged on the top and bottom of the preheating plate (546), and the reflecting film (547) is connected to the mounting plate (545) on the side close to the mounting plate (545), and a first screw rod (548) is rotatably connected to the side of the mounting plate (545) close to the inner wall of the fixing ring (544), and a first screw sleeve (549) is threadedly connected to the surface of the first screw rod (548).

3. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 2 is characterized in that: The preheating plate (546) comprises a ceramic heating plate (5461), wherein the ceramic heating plate (5461) is connected to the mounting plate (545) on one side thereof, and a plurality of mounting grooves (5462) are provided inside the ceramic heating plate (5461) on the side thereof away from the mounting plate (545), and resistance wires (5463) and thermocouple sensors (5464) are respectively provided inside the mounting grooves (5462), and the resistance wires (5463) and the thermocouple sensors (5464) are arranged at intervals.

4. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 2 is characterized in that: The first screw sleeve (549) is located inside the fixing ring (544), and the first screw rod (548) extends to the outside of the fixing ring (544) away from the side of the mounting plate (545), and two telescopic rods (6) are bolted between the mounting plate (545) and the inner wall of the fixing ring (544).

5. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 2 is characterized in that: The connecting shaft (542) includes a shaft rod (5421), the shaft rod (5421) is located inside the fixing frame (541), and the connecting plate (543) is rotatably sleeved on the surface of the shaft rod (5421), and the two sides of the surface of the shaft rod (5421) are respectively sleeved with a shaft sleeve (5422) and a positioning plate (5423), and the side of the positioning plate (5423) close to the connecting plate (543) is in close contact with it, and a positioning spring (5424) is annularly bolted between the shaft sleeve (5422) and the opposite side of the positioning plate (5423), and the two sides of the surface of the shaft rod (5421) are sleeved with a check ring (5425), and the side of the check ring (5425) close to the shaft sleeve (5422) is in close contact with it.

6. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 2, characterized in that: The cantilever (53) comprises a fixing sleeve (531), the rear side of the fixing sleeve (531) is connected to the rotating shaft (52), and a tooth plate (532) is slidably connected inside the fixing sleeve (531), an extension plate (533) is bolted to the front side of the tooth plate (532), and the extension plate (533) is bolted to the fixing frame (541), the left side of the tooth plate (532) is meshingly connected with a gear (534), and an output shaft (535) is arranged inside the gear (534), two limiting plates (536) are sleeved on the surface of the output shaft (535), and the right side of the limiting plate (536) is bolted to the fixing sleeve (531).

7. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 6 is characterized in that: A synchronous disk (7) is sleeved on the top of the surface of the output shaft (535), and a limiting rod (8) runs through the interior of the top limiting plate (536), the bottom of the limiting rod (8) extends to the interior of the synchronous disk (7), and a plurality of limiting grooves for use with the limiting rod (8) are provided in an annular shape on the top of the synchronous disk (7).

8. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 6, characterized in that: The guide member (55) comprises an arc-shaped plate (551), the arc-shaped plate (551) is bolted to the front side of the lifting structure (4), and a stud (552) penetrates the interior of the arc-shaped plate (551), the bottom of the stud (552) is rotatably connected to the fixing sleeve (531), the top of the surface of the stud (552) is threadedly connected to a locking nut (553), and the bottom of the locking nut (553) is in close contact with the arc-shaped plate (551).

9. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 8, characterized in that: An arc-shaped hole (9) is provided inside the arc-shaped plate (551), and the stud (552) passes through the inside of the arc-shaped hole (9).

10. The aluminum alloy welding thermal crack suppression device using a preheating structure according to claim 2, characterized in that: The lifting structure (4) comprises a second screw sleeve (41), the second screw sleeve (41) is arranged inside the support plate (3), and the internal thread of the second screw sleeve (41) penetrates a second screw rod (42), the bottom of the second screw rod (42) is connected to a moving plate (43) through a bearing, the bottom of the moving plate (43) is connected to the support plate (51), and guide rods (44) are bolted on both sides of the top of the moving plate (43), and the top of the guide rods (44) extends to the top of the support plate (3).

Images