A welding device for the production and processing of semi-trailer carriages

Abstract

The present invention relates to the technical field of semi-trailer carriage welding, and discloses a welding device for the production and processing of semi-trailer carriages, including two groups of symmetric support frames. A welding platform is jointly arranged on one side of the two groups of support frames close to each other. A surrounding plate and a support beam body are horizontally supported on the top of the welding platform; for this welding device for the production and processing of semi-trailer carriages, the first support column drives the support cross plate to move downward, thereby respectively driving the second roller and the first roller to move downward. The second roller first fits with the top surface of the surrounding plate, and then the first roller fits with the top surface of the support beam body. The displacement force of the first roller drives the two groups of second rollers to move in the direction of approaching the support beam body. Through the friction between the bottom of the second roller and the top surface of the surrounding plate, an extrusion force on the surrounding plate towards the support beam body is generated, so that the weld position between the surrounding plate and the support beam body maintains a stable position structure.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-trailer carriage welding, and more specifically, it relates to a welding device for the production and processing of semi-trailer carriages. Background Technique

[0002] The semi-trailer carriage is welded by many components. The main components are the side panels and the girders. The girders include longitudinal girders and cross girders. The side panels are welded to the girders by electric welding to form the main structure of the carriage. Then, through assembly with the frame, corner posts, floor, etc., the production process of the carriage is completed. Welding, as the core process of carriage manufacturing, its efficiency and quality are crucial for production efficiency and product quality. Traditional semi-trailer carriage welding mainly relies on manual or semi-automatic welding.

[0003] In the existing mechanical welding process, the side panels and the girders are usually laid flat on the welding platform, and the welding machine is used to weld the splicing positions of the two to complete the welding process. However, during the welding process, in order to make the side panels and the girders spliced together, a lateral clamping force is applied to the side panels and the girders. While this clamping force positions the side panels and the girders, it is also easy to cause local misalignment of the side panels and the girders, thereby affecting the welding effect of the carriage. At the same time, during the welding process, a large amount of slag and oxides are generated, and there will be a splashing phenomenon. The splashed slag and oxides adhere to the welding areas of the side panels and the girders in large quantities. Some of the slag or oxides are not easy to clean after cooling and need to be removed in time. Therefore, in order to achieve the stability of the structure at the splicing position of the side panels and the girders during the welding process and the cleaning of the slag and oxides, it is necessary to optimize the structure of the existing welding device. Summary of the Invention

[0004] The present invention provides a welding device for the production and processing of semi-trailer carriages, which solves the technical problems in the related art that the existing welding device is prone to local misalignment of the side panels and the girders during the welding process, and the slag and oxides in the welding area cannot be cleaned in time.

[0005] The present invention realizes the above object through the following technical solutions:

[0006] A welding device for the production and processing of semi-trailer carriages includes two groups of symmetric support frames. A welding platform is jointly arranged on one side of the two groups of support frames that are close to each other. The side panels and the support beam bodies are horizontally supported on the top of the welding platform. The top of the two groups of support frames supports a gantry. The gantry horizontally slides and displaces transversely on the top of the support frames. A displacement mechanism is arranged at the bottom of the gantry, and the displacement mechanism longitudinally slides and displaces horizontally on the top of the gantry;

[0007] A rolling positioning mechanism is provided at the bottom of the displacement mechanism. The rolling positioning mechanism includes a pressing and positioning component and a welding component. The pressing and positioning component is used to squeeze the top of the gusset plate and the support beam body and move the gusset plates on both sides of the support beam body closer to the position of the support beam body. The welding component is used to weld the splicing gap between the gusset plate and the support beam body.

[0008] As a further optimized solution of the present invention, the displacement mechanism includes a horizontal displacement component sleeved on the outer side of the top of the gantry. The horizontal displacement component is sleeved on the outer side of the gantry and longitudinally slides and displaces on the outer side of the gantry. An expansion and contraction component is provided at the bottom of the horizontal displacement component. The output end of the expansion and contraction component is provided with a rotation component. The expansion and contraction component drives the rotation component to move up and down.

[0009] As a further optimized solution of the present invention, the rolling positioning mechanism includes a first support column provided at the bottom of the rotation component. The rotation component drives the entire first support column to rotate. A support cross plate is provided at the bottom of the first support column. The pressing and positioning component includes a support column and a main support column. The support columns are symmetrically arranged at both ends of the support cross plate. The main support column is inserted into the interior of the first support column from the bottom of the first support column.

[0010] As a further optimized solution of the present invention, a second support column is provided on one side of the first support column. The welding component includes a hydraulic cylinder provided at the top of the second support column. The output end of the hydraulic cylinder is provided with a telescopic rod that penetrates to the bottom of the second support column. The bottom of the telescopic rod is connected to a support ring by a bearing. A welding torch unit is provided at the bottom of the support ring. A micro motor is provided at the bottom of the outer side of the telescopic rod. The output end of the micro motor is provided with a gear. A toothed ring that meshes with the gear is provided on the inner side of the support ring. The micro motor drives the gear to drive the toothed ring to rotate, thereby driving the support ring to drive the welding torch unit to rotate.

[0011] As a further optimized solution of the present invention, a first roller is provided at the bottom of the main support column. The bottom of the first roller is in mutual contact with the top of the support beam body. A second spring is provided at the top of the main support column. A first displacement cavity adapted to the main support column is provided inside the first support column. The top end of the second spring is fixedly connected to the top of the first displacement cavity. Hinge seats are symmetrically arranged on both sides of the top of the main support column. One end of the two hinge seats away from each other extends to the outside of the first support column and is hinged with a hinge connecting rod. Second displacement grooves adapted to the hinge seats are provided on both sides of the first support column.

[0012] As a further optimization scheme of the present invention, second displacement cavities are symmetrically arranged inside the two sides of the supporting cross plate, and a supporting slider is slidably arranged inside the second displacement cavity. Displacement blocks are symmetrically arranged at both ends of the supporting slider, and a first displacement groove matched with the displacement block is arranged at the inner wall position of the second displacement cavity. The supporting column runs through the upper and lower ends of the supporting slider, and a long through hole matched with the supporting column is arranged at the bottom of the supporting cross plate. The other end of the hinged connecting rod is hinged to the supporting slider, and a second roller pressure wheel that fits the top of the enclosure is arranged at the bottom of the supporting column, and a first spring is sleeved on the outer side of the support column at a position between the supporting slider and the second roller pressure wheel.

[0013] As a further optimization scheme of the present invention, the horizontal position height of the first roller pressure wheel is higher than the horizontal position height of the second roller pressure wheel, and the rolling directions of the first roller pressure wheel and the second roller pressure wheel are both along the welding direction of the enclosure and the support beam body, a transmission shaft extending to both sides of the bottom of the main support column is arranged at the center position of the first roller pressure wheel, and support boxes sleeved on the outside of the transmission shaft are arranged on both sides of the bottom of the main support column, and an incomplete gear is arranged at the end of the transmission shaft away from the first roller pressure wheel.

[0014] As a further optimization scheme of the present invention, displacement seats extending into the interior of the support box are provided on both sides of the bottom of the support box, and displacement slide rods are provided through both ends of the displacement seat. Both ends of the displacement slide rods are fastened to the inner wall of the support box, and the displacement seat slides longitudinally on the outside of the displacement slide rod. A return spring is sleeved on the outside of the displacement slide rod, and one end of the return spring is fastened to the displacement seat, and the other end thereof is fastened to the inner wall of the support box.

[0015] As a further optimization scheme of the present invention, a rack intermittently meshing with an incomplete gear is arranged on the top of the displacement seat, and the rotation of the incomplete gear drives the displacement seat at the bottom of the rack to follow the displacement, and a steel brush is arranged at the bottom of the displacement seat, and the position of the steel brush corresponds to the position of the weld between the enclosure and the support beam.

[0016] As a further optimization scheme of the present invention, the two groups of support frames are symmetrically mounted with threaded rods at the positions located at the top of the welding platform, and several groups of internal threaded blocks are evenly and symmetrically arranged on the outer sides of the threaded rods, and one side of each group of internal threaded blocks is provided with a hinged rod, and the other end of the hinged rod is jointly hinged with a long clamping plate, and the two groups of long clamping plates located at both ends of the top of the welding platform clamp the end faces of the enclosure and the support beam, and a synchronization mechanism is provided on one side of the welding platform that is synchronously transmitted to the two groups of threaded rods, and the driving end of the synchronization mechanism is transmission-connected to a driving motor, and a slide groove that matches the bottom of the long clamping plate is provided on the top of the welding platform, and the displacement of the long clamping plate is guided by the slide groove.

[0017] The beneficial effects of the present invention are as follows: The first support column drives the support cross plate to move downward, thereby driving the second roller and the first roller to move downward respectively. The second roller first fits against the top surface of the enclosure plate, and then the first roller fits against the top surface of the support beam body. The upward extrusion force of the support beam body on the first roller drives the first roller to move upward. Then, the displacement force of the first roller drives the two groups of second rollers to move in the direction of approaching the support beam body. Through the friction between the bottom of the second roller and the top surface of the enclosure plate, an extrusion force on the enclosure plate towards the support beam body is generated, so that the position structure of the weld between the enclosure plate and the support beam body remains stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the schematic assembly diagram of the welding process in the present invention;

[0019] Figure 2 is the three-dimensional schematic structure diagram of the present invention;

[0020] Figure 3 is the enlarged schematic diagram of the connection structure at the long splint in the present invention;

[0021] Figure 4 is the enlarged schematic diagram of the connection structure at the gantry in the present invention;

[0022] Figure 5 is the three-dimensional schematic diagram of the position structure of the enclosure plate, support beam body and rolling positioning mechanism in the splicing state in the present invention;

[0023] Figure 6 is the side view of the position structure of the enclosure plate, support beam body and rolling positioning mechanism in the splicing state in the present invention;

[0024] Figure 7 is the enlarged schematic diagram of the structure of the welding assembly, enclosure plate and support beam body in the present invention;

[0025] Figure 8 is the enlarged schematic diagram of the structure of the downward pressing and positioning assembly, enclosure plate and support beam body in the present invention;

[0026] Figure 9 is the enlarged schematic diagram of the structure of the welding assembly in the present invention;

[0027] Figure 10 is the enlarged cross-sectional view of the structure of the downward pressing and positioning assembly in the present invention;

[0028] Figure 11 is the enlarged cross-sectional view of the internal structure of the first support column and the support cross plate in the present invention;

[0029] Figure 12 is the enlarged schematic diagram of the connection structure of the support column in the present invention;

[0030] Figure 13 It is an enlarged schematic view of the connection structure at the main support column in the present invention;

[0031] Figure 14 It is an enlarged cross-sectional view of the structure at the support box in the present invention;

[0032] Figure 15 It is an enlarged cross-sectional view of the connection structure at the displacement seat in the present invention.

[0033] In the figure: 1, support frame; 2, enclosing plate; 3, synchronization mechanism; 4, support beam body; 5, driving motor; 6, long clamping plate; 7, gantry; 8, sliding groove; 9, welding platform; 10, threaded rod; 11, internally threaded sleeve block; 12, articulated rod;

[0034] 100, rolling positioning mechanism; 200, displacement mechanism;

[0035] 101, first support column; 102, second support column; 103, hydraulic cylinder; 104, support cross plate; 105, support column; 106, steel brush; 107, articulated connecting rod; 108, first spring; 109, first roller press wheel; 110, second roller press wheel; 111, micro motor; 112, support ring; 113, support box; 114, telescopic rod; 115, toothed ring; 116, welding torch unit; 117, gear; 118, second spring; 119, main support column; 120, support slider; 121, first displacement cavity; 122, second displacement cavity; 123, first displacement groove; 124, second displacement groove; 125, displacement block; 126, articulated seat; 127, incomplete gear; 128, transmission shaft; 129, rack; 130, displacement seat; 131, displacement slide bar; 132, return spring;

[0036] 201, horizontal displacement assembly; 202, telescopic assembly; 203, rotating assembly. Detailed implementation manners

[0037] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0038] Embodiment 1

[0039] As Figure 1 、 Figure 2 、 Figure 4As shown in the figure, a welding device for the production and processing of a semi-trailer carriage includes two sets of symmetric support frames 1. On one side where the two support frames 1 are close to each other, a welding platform 9 is jointly arranged. The top of the welding platform 9 is paved and supported with a surrounding plate 2 and a support beam body 4. The tops of the two support frames 1 support a gantry 7. The gantry 7 slides horizontally and transversely on the top of the support frames 1. A displacement mechanism 200 is arranged at the bottom of the gantry 7. The displacement mechanism 200 slides horizontally and longitudinally on the top of the gantry 7. The displacement mechanism 200 includes a horizontal displacement component 201 sleeved on the outer side of the top of the gantry 7. The horizontal displacement component 201 is sleeved on the outer side of the gantry 7 and slides longitudinally on the outer side of the gantry 7. A telescopic component 202 is arranged at the bottom of the horizontal displacement component 201. The output end of the telescopic component 202 is provided with a rotating component 203. The telescopic component 202 drives the rotating component 203 to move up and down;

[0040] As Figure 4 , Figure 5 shown in the figure, a rolling positioning mechanism 100 is arranged at the bottom of the displacement mechanism 200. The rolling positioning mechanism 100 includes a first support column 101 arranged at the bottom of the rotating component 203. The rotating component 203 drives the whole first support column 101 to rotate. A support cross plate 104 is arranged at the bottom of the first support column 101;

[0041] As Figures 5 to 14 shown in the figure, the rolling positioning mechanism 100 includes a pressing and positioning component and a welding component. The pressing and positioning component is used to extrude the top of the surrounding plate 2 and the support beam body 4 and move the surrounding plates 2 on both sides of the support beam body 4 closer to the position of the support beam body 4. The welding component is used to weld the splicing gap between the surrounding plate 2 and the support beam body 4;

[0042] The pressing and positioning component includes support columns 105 and a main support column 119. The support columns 105 are symmetrically arranged at both ends of the support cross plate 104. The main support column 119 is inserted into the inside of the first support column 101 from the bottom of the first support column 101. A second support column 102 is arranged on one side of the first support column 101. The welding component includes a hydraulic cylinder 103 arranged at the top of the second support column 102. The output end of the hydraulic cylinder 103 is provided with a telescopic rod 114 penetrating to the bottom of the second support column 102. The bottom of the telescopic rod 114 is connected by a bearing to a support ring 112. A welding torch unit 116 is arranged at the bottom of the support ring 112. A micro motor 111 is arranged at the bottom outside the telescopic rod 114. The output end of the micro motor 111 is provided with a gear 117. A toothed ring 115 meshing with the gear 117 is arranged on the inner side of the support ring 112. The micro motor 111 drives the gear 117 to drive the toothed ring 115 to rotate, and then drives the support ring 112 to drive the welding torch unit 116 to rotate;

[0043] A first roller 109 is provided at the bottom of the main support column 119. The bottom of the first roller 109 is in mutual contact with the top of the support beam body 4. A second spring 118 is provided at the top of the main support column 119. A first displacement cavity 121 adapted to the main support column 119 is provided inside the first support column 101. The top end of the second spring 118 is fixedly connected to the top of the first displacement cavity 121. Hinge seats 126 are symmetrically provided on both sides of the top of the main support column 119. One end of each of the two sets of hinge seats 126 away from each other extends to the outside of the first support column 101 and is hinged with a hinge connecting rod 107. Second displacement grooves 124 adapted to the hinge seats 126 are provided on both sides of the first support column 101. Second displacement cavities 122 are symmetrically provided inside both sides of the support cross plate 104. A support slider 120 is slidably provided inside the second displacement cavity 122. Displacement blocks 125 are symmetrically provided at both ends of the support slider 120. A first displacement groove 123 adapted to the displacement blocks 125 is provided at the inner wall position of the second displacement cavity 122. The support column 105 penetrates through the upper and lower ends of the support slider 120, and a long through hole adapted to the support column 105 is provided at the bottom of the support cross plate 104. The other end of the hinge connecting rod 107 is hinged with the support slider 120. A second roller 110 in mutual contact with the top of the enclosing plate 2 is provided at the bottom of the support column 105. A first spring 108 is sleeved at the position between the support slider 120 and the second roller 110 on the outside of the support column 105. The horizontal position height of the first roller 109 is higher than the horizontal position height of the second roller 110, and the rolling directions of both the first roller 109 and the second roller 110 are along the direction of welding of the enclosing plate 2 and the support beam body 4. A transmission shaft 128 extending to both sides of the bottom of the main support column 119 is provided at the central position of the first roller 109, and support boxes 113 sleeved on the outside of the transmission shaft 128 are provided on both sides of the bottom of the main support column 119. Incomplete gears 127 are provided at the ends of the transmission shaft 128 away from the first roller 109. Displacement seats 130 extending to the inside of the support boxes 113 are provided on both sides of the bottom of the support boxes 113. Displacement slide rods 131 penetrate through both ends of the displacement seats 130, and the two ends of the displacement slide rods 131 are fixedly connected to the inner walls of the support boxes 113. The displacement seats 130 longitudinally slide and displace on the outside of the displacement slide rods 131. A return spring 132 is sleeved on the outside of the displacement slide rods 131. One end of the return spring 132 is fixedly connected to the displacement seat 130, and the other end thereof is fixedly connected to the inner wall of the support box 113. A rack 129 intermittently meshing with the incomplete gear 127 is provided at the top of the displacement seat 130. The rotation of the incomplete gear 127 drives the displacement seat 130 at the bottom of the rack 129 to follow the displacement. A steel wire brush 106 is provided at the bottom of the displacement seat 130, and the position of the steel wire brush 106 corresponds to the weld position between the enclosing plate 2 and the support beam body 4;

[0044] Such as Figure 1 、Figure 2 , Figure 3 As shown, two groups of supporting frames 1 are symmetrically mounted with threaded rods 10 at the positions on the top of the welding platform 9, and several groups of internal threaded blocks 11 are evenly and symmetrically arranged on the outer sides of the threaded rods 10. One side of the several groups of internal threaded blocks 11 is provided with a hinged rod 12, and the other end of the hinged rod 12 is hinged with a long clamping plate 6. The two groups of long clamping plates 6 located at both ends of the top of the welding platform 9 clamp the end faces of the enclosure 2 and the supporting beam 4. A synchronization mechanism 3 is provided on one side of the welding platform 9 for synchronous transmission connection with the two groups of threaded rods 10, and the driving end of the synchronization mechanism 3 is transmission connected with a driving motor 5. A slide groove 8 which is compatible with the bottom of the long clamping plate 6 is provided on the top of the welding platform 9, and the displacement of the long clamping plate 6 is guided by the slide groove 8.

[0045] The use process of the welding device for producing and processing a semitrailer carriage proposed in this embodiment is as follows. When the welding device is in use, the enclosure 2 and the support beam 4 to be welded are laid flat on the top of the welding platform 9 in sequence, and then the driving motor 5 is started to drive the synchronous mechanism 3 to drive the threaded rod 10 to rotate, and the rotation of the threaded rod 10 drives the internal threaded sleeve 11 to move, and then the displacement of the internal threaded sleeve 11 drives the long clamping plate 6 hinged by the hinge rod 12 to clamp the end faces of the enclosure 2 and the support beam 4, thereby positioning the enclosure 2 and the support beam 4;

[0046] Then, the position of the gantry 7 on the top of the support frame 1 is adjusted to drive the rolling positioning mechanism 100 and the displacement mechanism 200 to follow the displacement as a whole, so that the bottom of the rolling positioning mechanism 100 corresponds to the splicing and welding position of the enclosure 2 and the support beam body 4;

[0047] The position height of the rolling positioning mechanism 100 is adjusted by starting the telescopic component 202, and the rolling positioning mechanism 100 is driven to rotate as a whole by starting the rotating component 203 to adjust the welding direction of the welding gun unit 116;

[0048] Furthermore, by starting the telescopic assembly 202, the rolling positioning mechanism 100 is displaced downward as a whole. At this time, the first support column 101 drives the support cross plate 104 to move downward, so that the second roller pressure wheel 110 first fits with the top surface of the enclosure 2. At this time, the top of the enclosure 2 generates a reverse extrusion force on the second roller pressure wheel 110, so that the second roller pressure wheel 110 drives the support column 105 to move upward, thereby compressing the first spring 108. As the support column 105 continues to move upward, the first roller pressure wheel 109 continues to move downward until it fits with the top of the support beam 4. Then, the first roller pressure wheel 109 is subjected to the reverse extrusion force from the top of the support beam 4, so that the first roller pressure wheel 109 also drives the main support column 119 to move upward, thereby compressing the second spring 118.

[0049] The upward displacement of the main support column 119 drives the hinge seat 126 to pull the hinge connecting rod 107 upward, and then the hinge connecting rod 107 pulls the support slider 120 to slide internally in the support cross plate 104, so that the two support sliders 120 approach the position of the first support column 101. The displacement of the support slider 120 drives the support column 105 to follow the displacement. At this time, the second roller 110 follows the displacement of the support column 105, and then the two second rollers 110 generate a frictional force on the top of the bottom enclosure plate 2. This frictional force causes the enclosure plate 2 to approach the position of the support beam body 4, so that the joint position between the enclosure plate 2 and the support beam body 4 is subjected to a stable extrusion force, thereby maintaining the stability of the welded position structure of the enclosure plate 2 and the support beam body 4;

[0050] When the second roller 110 approaches the position of the support beam body 4, at this time, the bottom of the second roller 110 does not roll on the top surface of the enclosure plate 2. Through the frictional force between the two, the second roller 110 generates a pushing effect on the top of the enclosure plate 2;

[0051] When welding the joint position between the enclosure plate 2 and the support beam body 4, at this time, the horizontal displacement component 201 is started to drive the overall displacement of the first support column 101. During the welding process, the welding torch unit 116 is located at the front end in the advancing direction, and the first support column 101 is located at the rear end in the advancing direction. During the displacement of the first support column 101, the first roller 109 rolls on the top of the support beam body 4, and the second roller 110 rolls on the top of the enclosure plate 2;

[0052] As the first roller 109 rolls, it drives the incomplete gear 127 at one end of the transmission shaft 128 to rotate. When the incomplete gear 127 meshes with the rack 129, it drives the displacement seat 130 to longitudinally displace horizontally inside the support box 113, and stretches or compresses the return spring 132 to generate a rebound force. When the incomplete gear 127 rotates and does not mesh with the rack 129, at this time, under the action of the rebound force of the return spring 132, the displacement seat 130 is driven to reset in the reverse direction. The longitudinal horizontal displacement of the displacement seat 130 drives the steel brush 106 to clean the welding position between the enclosure plate 2 and the support beam body 4, and then clears the slag and oxide debris generated during the welding process by the welding torch unit 116, thus realizing the triple functions of welding, positioning, and cleaning.

[0053] The specific implementation manner of this embodiment has been described above, but this embodiment is not limited to the above specific implementation manner. The above specific implementation manner is only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A welding device for the production and processing of a semi-trailer carriage, characterized in that, It includes two sets of symmetric support frames (1). A welding platform (9) is commonly arranged on the side where the two sets of support frames (1) are close to each other. A retaining plate (2) and a support beam body (4) are horizontally laid and supported on the top of the welding platform (9). A gantry (7) is supported on the top of the two sets of support frames (1). The gantry (7) horizontally slides and displaces transversely on the top of the support frame (1). A displacement mechanism (200) is arranged at the bottom of the gantry (7). The displacement mechanism (200) horizontally slides and displaces longitudinally on the top of the gantry (7). The displacement mechanism (200) includes a horizontal displacement component (201) sleeved on the outer side of the top of the gantry (7). The horizontal displacement component (201) is sleeved on the outer side of the gantry (7) and longitudinally slides and displaces on the outer side of the gantry (7). A telescopic component (202) is arranged at the bottom of the horizontal displacement component (201). A rotating component (203) is arranged at the output end of the telescopic component (202). The telescopic component (202) drives the rotating component (203) to displace up and down. A rolling positioning mechanism (100) is arranged at the bottom of the displacement mechanism (200). The rolling positioning mechanism (100) includes a downward pressing and positioning component and a welding component. The downward pressing and positioning component is used to extrude the top of the retaining plate (2) and the support beam body (4) and move the retaining plates (2) on both sides of the support beam body (4) closer to the position of the support beam body (4). The welding component is used to weld the splicing gap between the retaining plate (2) and the support beam body (4). The rolling positioning mechanism (100) includes a first support column (101) arranged at the bottom of the rotating component (203). The rotating component (203) drives the first support column (101) to rotate as a whole. A support cross plate (104) is arranged at the bottom of the first support column (101). The downward pressing and positioning component includes support columns (105) and a main support column (119). The support columns (105) are symmetrically arranged at both ends of the support cross plate (104). The main support column (119) is inserted into the inside of the first support column (101) from the bottom of the first support column (101). A first roller (109) is arranged at the bottom of the main support column (119). The bottom of the first roller (109) is in mutual contact with the top of the support beam body (4). A second spring (118) is arranged at the top of the main support column (119). A first displacement cavity (121) adapted to the main support column (119) is arranged inside the first support column (101). The top end of the second spring (118) is fixedly connected to the top of the first displacement cavity (121). Hinge seats (126) are symmetrically arranged on both sides of the top of the main support column (119). One end of the two hinge seats (126) away from each other extends to the outside of the first support column (101) and is hinged with a hinge connecting rod (107). Second displacement grooves (124) adapted to the hinge seats (126) are arranged on both sides of the first support column (101). On both sides of the supporting cross plate (104), second displacement cavities (122) are symmetrically arranged inside. A supporting slider (120) is slidably arranged inside the second displacement cavity (122). Displacement blocks (125) are symmetrically arranged at both ends of the supporting slider (120). At the inner wall position of the second displacement cavity (122), first displacement grooves (123) adapted to the displacement blocks (125) are arranged. The supporting column (105) penetrates through the upper and lower ends of the supporting slider (120), and a long through hole adapted to the supporting column (105) is arranged at the bottom of the supporting cross plate (104). The other end of the articulated connecting rod (107) is articulated with the supporting slider (120). A second roller (110) that fits with the top of the enclosing plate (2) is arranged at the bottom of the supporting column (105). A first spring (108) is sleeved at the position between the supporting slider (120) and the second roller (110) on the outside of the supporting column (105).

2. The welding device for the production and processing of a semi-trailer carriage according to claim 1, characterized in that, A second support column (102) is arranged on one side of the first support column (101). The welding assembly includes a hydraulic cylinder (103) arranged at the top of the second support column (102). The output end of the hydraulic cylinder (103) is provided with a telescopic rod (114) that penetrates to the bottom of the second support column (102). The bottom of the telescopic rod (114) is connected to a support ring (112) by a bearing. A welding torch unit (116) is arranged at the bottom of the support ring (112). A micro motor (111) is arranged at the bottom outside the telescopic rod (114). The output end of the micro motor (111) is provided with a gear (117). A toothed ring (115) that meshes with the gear (117) is arranged inside the support ring (112). The micro motor (111) drives the gear (117) to drive the toothed ring (115) to rotate, and then drives the support ring (112) to drive the welding torch unit (116) to rotate.

3. A welding device for the production and processing of a semi-trailer carriage according to claim 1, characterized in that, The horizontal position height of the first roller (109) is higher than the horizontal position height of the second roller (110), and the rolling directions of both the first roller (109) and the second roller (110) are along the welding direction of the enclosing plate (2) and the support beam body (4). A transmission shaft (128) extending to both sides of the bottom of the main support column (119) is arranged at the central position of the first roller (109), and support boxes (113) sleeved on the outside of the transmission shaft (128) are arranged on both sides of the bottom of the main support column (119). Incomplete gears (127) are arranged at the ends of the transmission shaft (128) far from the first roller (109).

4. A welding device for the production and processing of a semi-trailer carriage according to claim 3, characterized in that, Both sides of the bottom of the support box (113) are provided with displacement seats (130) extending into the interior of the support box (113); displacement slide bars (131) are provided through both ends of the displacement seat (130); both ends of the displacement slide bars (131) are tightly connected to the inner wall of the support box (113); the displacement seat (130) slides longitudinally on the outer side of the displacement slide bars (131); a return spring (132) is sleeved on the outer side of the displacement slide bars (131); one end of the return spring (132) is tightly connected to the displacement seat (130), and the other end of the return spring (132) is tightly connected to the inner wall of the support box (113).

5. A welding device for the production and processing of a semi-trailer carriage according to claim 4, characterized in that, A rack (129) intermittently meshing with the incomplete gear (127) is arranged at the top of the displacement seat (130); the incomplete gear (127) rotates to drive the displacement seat (130) at the bottom of the rack (129) to follow the displacement; a steel brush (106) is arranged at the bottom of the displacement seat (130); the position of the steel brush (106) corresponds to the position of the weld between the enclosure (2) and the support beam (4).

6. The welding device for the production and processing of a semi-trailer carriage according to claim 1, characterized in that, Two groups of support frames (1) are symmetrically mounted with threaded rods (10) at positions located at the top of the welding platform (9). Several groups of internal threaded sleeves (11) are evenly and symmetrically arranged on the outer sides of the threaded rods (10). One side of each of the several groups of internal threaded sleeves (11) is provided with a hinged rod (12). The other end of the hinged rod (12) is hingedly connected with a long clamping plate (6). The two groups of long clamping plates (6) located at the two ends of the top of the welding platform (9) clamp the end faces of the enclosure plate (2) and the support beam body (4). A synchronous mechanism (3) synchronously connected to the two groups of threaded rods (10) is arranged on one side of the welding platform (9). The driving end of the synchronous mechanism (3) is connected to the driving motor (5). A slide groove (8) adapted to the bottom of the long clamping plate (6) is arranged on the top of the welding platform (9). The displacement of the long clamping plate (6) is guided by the slide groove (8).

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