A welding device for heat exchanger of coating equipment

Abstract

The present invention relates to the technical field of welding devices, and specifically discloses a welding device for a heat exchanger of a coating equipment, comprising a feeding mechanism and two rolling welders, wherein a driving mechanism is arranged on the outer side of the feeding mechanism, a positioning mechanism is arranged on the driving mechanism, and an adjusting mechanism for adjusting the positioning mechanism is arranged on the inner side of the driving mechanism, wherein the positioning mechanism comprises a sliding assembly arranged on the driving mechanism, four limit assemblies respectively slidably arranged on both sides of the inner wall of the sliding assembly, and four extrusion assemblies respectively slidably arranged on the four limit assemblies; in the welding device for a heat exchanger of a coating equipment of the present invention, when two workpieces are in contact, the two workpieces can be adaptively clamped by an extrusion plate, which is convenient for clamping workpieces of different thicknesses, and when the workpiece moves toward the rolling welder, under the action of the adjusting mechanism, the sliding column pushes the extrusion plate through the top plate on the movable frame to strengthen the clamping effect of both ends of the workpiece, prevent the workpiece from shifting during movement, and achieve the effect of automatically positioning the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a welding device for a heat exchanger of a coating equipment. Background Art

[0002] During the production process in the paint shop, the organic waste gas generated by the drying furnace needs to be incinerated and purified before it can be discharged. During the incineration process, high-temperature exhaust gas will be generated. The waste heat of this part of the high-temperature exhaust gas can be recycled, and the waste heat recovery requires the use of a heat exchanger for heat exchange. The plate heat exchanger is a high-efficiency heat exchanger welded from a series of metal sheets with certain patterns on the surface. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. It has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, wide application, and long service life. During the production process of the plate heat exchanger, the heat exchanger plates need to be welded by a welding device.

[0003] A Chinese patent document with authorization announcement number CN116493829B discloses a plate heat exchanger welding device and a welding method thereof. The plate heat exchanger welding device and the welding method thereof align the upper and lower heat exchanger plates by cooperating with an alignment plate, an inverted T-shaped column, and a pressure column, thereby improving the alignment accuracy of the heat exchanger plates. At the same time, the two ends of the upper and lower heat exchanger plates arranged along their width direction are pressed tightly to prevent the upper and lower heat exchanger plates from moving out of position during the movement process, thereby affecting the subsequent welding quality of the heat exchanger plates.

[0004] However, the structural design of the above-mentioned related technology: during the welding process of the heat exchange plate, the shape of the step limit roller matches the shape of the heat exchange plate, resulting in that only heat exchange plates of the same thickness can pass through the step limit roller. When heat exchange plates of different thicknesses need to be welded, the step limit roller and other mechanisms need to be adjusted, and the heat exchange plate cannot be positioned adaptively, making it inconvenient to adapt to heat exchange plates of different thicknesses.

[0005] Therefore, a welding device for a heat exchanger of a coating equipment is proposed to solve the above-mentioned problems. Summary of the invention

[0006] The present invention provides a welding device for a heat exchanger of a coating equipment, aiming to solve the problem in the related art that the heat exchange plate cannot be positioned adaptively and is inconvenient to adapt to heat exchange plates of different thicknesses.

[0007] The welding device for a heat exchanger of a coating equipment of the present invention comprises a feeding mechanism and two seam welders, a driving mechanism is arranged outside the feeding mechanism, a positioning mechanism for clamping a workpiece is arranged on the driving mechanism, and an adjusting mechanism for adjusting the positioning mechanism is arranged inside the driving mechanism;

[0008] The positioning mechanism includes a sliding assembly arranged on the driving mechanism, four limit assemblies respectively slidably arranged on both sides of the inner wall of the sliding assembly, and four extrusion assemblies respectively slidably arranged on the four limit assemblies, and every two limit assemblies are arranged opposite to each other to clamp the edge of the workpiece;

[0009] The limiting assembly includes an inclined plate elastically slidably connected to the inner side wall of the sliding assembly in the transverse direction and a plurality of extrusion plates elastically slidably connected to the inclined plate in the vertical direction, and the extrusion plates are used to clamp the workpiece;

[0010] The extrusion assembly includes a movable frame vertically slidably arranged on an inclined plate, on which two sliding columns slidably arranged in an adjusting mechanism are installed, and top plates elastically slidably connected to the movable frame along the vertical direction are installed on both sides of the top of the movable frame to push the extrusion plate.

[0011] After the workpiece is automatically added to the sliding assembly through the feeding mechanism, there is no need to place the workpiece manually. The workpiece can squeeze the inclined plate and the extrusion plate in sequence along the side wall of the sliding assembly. When the two workpieces are in contact, the two workpieces are clamped by the extrusion plate. When the workpiece moves toward the seam welding machine, under the action of the adjustment mechanism, the sliding column pushes the extrusion plate through the top plate on the movable frame to strengthen the clamping effect at both ends of the workpiece.

[0012] Preferably, the inclined plate has an inclined surface 1 which gradually inclines toward the side wall of the sliding component from top to bottom, and the extrusion plate has an inclined surface 2 which gradually inclines toward the side wall of the sliding component from bottom to top, and the two workpieces can contact along the inclined surface 1 on the inclined plate and the inclined surface 2 on the extrusion plate.

[0013] The inclined surface 1 on the inclined plate can enable the workpiece to push the inclined plate to move into the sliding assembly, and the inclined surface 2 on the extrusion plate can drive the two workpieces to fit together when the inclined plate is reset to adapt to workpieces of different thicknesses.

[0014] Preferably, the loading mechanism includes material box one and material box two that are arranged opposite to each other, material box two is located at the bottom of material box one, the interior of material box two is slidably connected with a support plate for driving the workpiece to move upward, a telescopic part two is installed on one side of material box two, and a positioning plate for aligning the workpiece is installed on the telescopic part two.

[0015] Through the support plate, the workpiece in the second material box can be placed in the sliding assembly, and through the positioning plate, the two workpieces can be aligned when the workpieces are moved, thereby ensuring welding accuracy.

[0016] Preferably, a clamping mechanism is provided on the material box, and the clamping mechanism includes a clamping assembly and two blocking assemblies. The clamping assembly includes clamping plates slidably arranged at the bottom of both sides of the material box to clamp the workpiece, and the blocking assembly includes a baffle plate slidably arranged at the bottom of the clamping plate to release the workpiece.

[0017] The workpiece in the material box one can be clamped by the two clamping plates, and the lowermost workpiece in the material box one can be prevented from falling or the lowermost workpiece in the material box one can be made to enter the sliding assembly by sliding the baffle plate.

[0018] Preferably, the sliding assembly includes a connecting plate and two side plates installed on the connecting plate, the inner side of the side plate is provided with two installation grooves arranged up and down, the four limit assemblies are respectively arranged in pairs in the two installation grooves of the two side plates, the top of the side plate is in contact with the bottom of the baffle, the bottom of the side plate is in contact with the top of the second material box, and the side plate is connected to the driving mechanism.

[0019] Preferably, guide rods are installed on both sides of the top of the movable frame, and the top plate is slidably connected to the outer side of the top end of the guide rods. The top of the top plate passes through the extrusion plate and extends to the inside of the extrusion plate located at the edge of the inclined plate to clamp the two ends of the workpiece.

[0020] Preferably, the adjustment mechanism includes four transverse plates, and the four transverse plates correspond one-to-one to the movable frames in the four extrusion assemblies respectively.

[0021] Preferably, a guide groove is provided on one side of the horizontal plate, and the guide groove has a long strip groove and a short strip groove. The end of the long strip groove in the guide groove is connected to the beginning of the short strip groove through a vertical groove. A through groove is provided between the long strip groove and the short strip groove in the guide groove. A connecting groove is provided on the horizontal plate near the end of the short strip groove of the guide groove. The end of the short strip groove in the guide groove and the end of the connecting groove are both provided with slopes. The beginning and one side of the bottom of the long strip groove in the guide groove are both provided with inclined grooves, and the inclined groove on one side of the bottom of the long strip groove on the guide groove is connected to the connecting groove.

[0022] The effect is that when the workpiece moves, the slide column can be moved upward through the inclined groove so that the extrusion plate can further clamp the two ends of the workpiece. Through the through groove on the horizontal plate and the vertical groove in the guide groove, the slide column can be reset to release further clamping of the workpiece, making it easier for the seam welding machine to weld the workpiece.

[0023] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: after the workpiece is automatically added to the sliding assembly by the feeding mechanism, there is no need to place the workpiece manually, and the workpiece can sequentially squeeze the inclined plate and the extrusion plate along the side wall of the sliding assembly. When the two workpieces are in contact, the two workpieces can be adaptively clamped by the extrusion plate, which is convenient for clamping workpieces of different thicknesses. When the workpiece moves toward the roll welding machine, under the action of the adjustment mechanism, the sliding column pushes the extrusion plate through the top plate on the movable frame to strengthen the clamping effect at both ends of the workpiece and prevent the workpiece from shifting during the movement, thereby achieving the effect of automatically positioning the workpiece and being able to continuously feed the roll welding machine, thereby improving the welding efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention.

[0025] Figure 2 It is a schematic structural diagram of a feeding mechanism and a clamping mechanism in a specific embodiment of the present invention.

[0026] Figure 3 It is a schematic structural diagram of a driving mechanism and a positioning mechanism of a specific embodiment of the present invention.

[0027] Figure 4 It is a schematic structural diagram of a sliding assembly in a specific embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of a side panel according to a specific embodiment of the present invention.

[0029] Figure 6 For the specific embodiment of the present invention Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0030] Figure 7 It is a schematic diagram of the truncated structure of the adjustment mechanism of a specific embodiment of the present invention.

[0031] Reference numerals:

[0032] 10. Feeding mechanism; 11. Material box 1; 12. Material box 2; 13. Telescopic part 1; 14. Positioning column; 15. Support plate; 16. Telescopic part 2; 17. Positioning plate; 18. Sliding shaft;

[0033] 20. Clamping mechanism; 21. Motor 1; 22. Turntable; 23. Articulated arm; 24. Sliding frame; 25. Clamping plate; 26. Telescopic member 3; 27. Fixed frame; 28. Baffle;

[0034] 30. Driving mechanism; 31. Guide rail 1; 32. Lead screw; 33. Motor 2; 34. Guide rail 2; 35. Sliding rod;

[0035] 40. Seam welding machine;

[0036] 50. Adjustment mechanism; 51. Horizontal plate; 52. Guide groove; 53. Connecting groove; 54. Slope; 55. Oblique groove; 56. Through hole; 57. Through groove;

[0037] 60. Positioning mechanism; 61. Sliding assembly; 611. Connecting plate; 612. Side plate; 613. Mounting groove; 62. Limiting assembly; 621. Inclined plate; 622. Sliding groove; 623. Spring 1; 624. Extrusion plate; 625. Spring 2; 63. Extrusion assembly; 631. Movable frame; 632. Sliding column; 633. Ball bearing; 634. Guide rod; 635. Spring 3; 636. Top plate; 637. Limiting groove; 64. Sliding block. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figures 1 to 7 As shown, the welding device for the heat exchanger of the coating equipment of the present invention comprises a feeding mechanism 10, a clamping mechanism 20, a driving mechanism 30, a seam welder 40, an adjusting mechanism 50 and a positioning mechanism 60. The clamping mechanism 20 is arranged on the feeding mechanism 10 to clamp the workpiece, the driving mechanism 30 is arranged on the outside of the feeding mechanism 10 to drive the workpiece to move, there are two seam welders 40, both of which are arranged at the end of the driving mechanism 30 to weld the workpiece, the positioning mechanism 60 is arranged on the driving mechanism 30 to position and clamp the workpiece, and the adjusting mechanism 50 is arranged on the inner side of the driving mechanism 30 so that the positioning mechanism 60 further clamps the workpiece.

[0040] The feeding mechanism 10 places the workpiece into the positioning mechanism 60, so that the positioning mechanism 60 positions and clamps the workpiece, and then the driving mechanism 30 drives the workpiece to move through the positioning mechanism 60. When the workpiece moves, under the action of the adjustment mechanism 50, the positioning mechanism 60 applies pressure to the ends of the workpiece to further clamp the ends of the two workpieces to prevent the workpieces from shifting during the movement. When the workpiece contacts the seam welder 40, the welding of the workpiece begins.

[0041] like Figure 1 to Figure 2As shown, the feeding mechanism 10 includes a material box 11 and a material box 12 which are arranged opposite to each other. The material box 11 and the material box 12 are used to store workpieces. The material box 12 is located at the bottom of the material box 11. The bottom of the material box 11 and the top of the material box 12 are both provided with openings for the workpieces to be moved out. One side of the material box 11 and the material box 12 are both provided with a feeding port for feeding. A telescopic member 13 is installed in the middle of the inner bottom wall of the material box 12, and positioning columns 14 are installed at the four corners of the inner bottom wall of the material box 12. Through the positioning columns 14, the workpiece can be inserted into the hole to prevent the workpiece from shifting in the material box 12. The telescopic end of the telescopic member 13 is installed with a support plate 15 for driving the workpiece to move upward, and the support plate 15 is slidably connected to the positioning column 14. A second telescopic member 16 is installed on the side of the second material box 12 away from the loading port, and a positioning plate 17 is installed on the top of the second telescopic member 16. The positioning plate 17 can be used to align the workpiece during the movement of the positioning mechanism 60.

[0042] During loading, the telescopic member 13 drives the workpiece upward through the support plate 15. When the top workpiece in the material box 12 enters the positioning mechanism 60, the telescopic member 13 drives the support plate 15 to reset, and the loading of the workpiece below is completed.

[0043] Continue to refer Figure 1 to Figure 2 As shown, the clamping mechanism 20 includes a clamping assembly and two blocking assemblies. The clamping assembly includes a motor 21, a turntable 22, an articulated arm 23, a sliding frame 24 and a clamping plate 25. The motor 21 is installed on the top of the material box 11, the turntable 22 is installed on the top of the driving shaft of the motor 21, there are two articulated arms 23, and the two articulated arms 23 are respectively hinged on both sides of the top of the turntable 22 and located at the edge of the turntable 22. There are two sliding frames 24 and clamping plates 25. The bottom of both sides of the material box 11 is provided with grooves for the clamping plates 25 to pass through, so as to clamp the workpiece. The tops of the two clamping plates 25 are respectively installed on the bottoms of the two sliding frames 24, and the tops of the two sliding frames 24 are respectively hinged on the bottoms of the two articulated arms 23. Two sliding shafts 18 slidably connected to the sliding frames 24 are installed on both sides of the material box 11.

[0044] like Figure 2 As shown, the blocking assembly includes a telescopic member 3 26, a fixing frame 27 and a baffle 28. The telescopic member 3 26 is installed on one side of the material box 11 and is located above the clamping plate 25. In this embodiment, the telescopic member 3 26 is a cylinder. In other embodiments, the telescopic member 3 26 is a hydraulic cylinder or an electric telescopic rod. The structures of the telescopic member 13, the telescopic member 2 16 and the telescopic member 3 26 are the same. The fixing frame 27 is in a U-shape, and the inner side of the fixing frame 27 is installed at the telescopic end of the telescopic member 3 26. The baffle 28 is installed on one side of the fixing frame 27 and contacts the bottom of the material box 11 for discharging materials.

[0045] When loading, the motor 21 drives the two sliding frames 24 to slide on the sliding shaft 18 through the two articulated arms 23 on the turntable 22. At the same time, the two sliding frames 24 drive the two clamps 25 to approach each other to clamp the workpieces in the material box 11. At this time, the lowest workpiece in the material box 11 is located between the clamps 25 and the baffle 28. Then the telescopic part 3 26 drives the baffle 28 to move to the outside of the material box 11 through the fixed frame 27, so that the workpiece automatically falls into the positioning mechanism 60.

[0046] like Figure 1 and Figure 3 As shown, the positioning mechanism 60 includes a sliding assembly 61, two sets of limit assemblies 62 and two sets of extrusion assemblies 63. The sliding assembly 61 is arranged on the inner side of the driving mechanism 30, the two sets of limit assemblies 62 are respectively slidably arranged on both sides of the inner wall of the sliding assembly 61, and the two sets of extrusion assemblies 63 are respectively slidably arranged on the two sets of limit assemblies 62.

[0047] like Figures 2 to 4 As shown, the sliding assembly 61 includes a connecting plate 611 and two side plates 612. Two mounting grooves 613 are provided on the inner side of the side plate 612. The two side plates 612 are respectively installed on both sides of the connecting plate 611 and are integrally arranged with the connecting plate 611. The top of the side plate 612 contacts the bottom of the baffle 28, and the bottom of the side plate 612 contacts the top of the material box 212. A slider 64 arranged on the driving mechanism 30 is installed on one side of the two side plates 612. Two sets of limit assemblies 62 are respectively arranged on the two side plates 612.

[0048] The driving mechanism 30 can drive the limiting assembly 62 on the side plate 612 to approach the seam welding machine 40 through the slider 64 .

[0049] like Figures 3 to 6 As shown, there are two limit assemblies 62 and two extrusion assemblies 63 in each group, and the two extrusion assemblies 63 are slidably arranged on the two limit assemblies 62 respectively. The two limit assemblies 62 are arranged in two mounting grooves 613 of the side plate 612 in a relative manner. The limit assemblies 62 include an inclined plate 621 and a plurality of extrusion plates 624. The inclined plate 621 has an inclined surface 1 which gradually tilts toward the side plate 612 from top to bottom, and a plurality of slide grooves 622 for the extrusion plates 624 to slide up and down are provided on the top of the inclined plate 621. The plurality of extrusion plates 624 are arranged at equal intervals along the length direction of the inclined plate 621, and a top of one side of the extrusion plate 624 has an inclined surface 2 which gradually tilts toward the side plate 612 from bottom to top. A spring 1 623 fixed to the inner top wall of the extrusion plate 624 is installed on the inner bottom wall of the slide groove 622, and a spring 2 625 fixed to the inner wall of the mounting groove 613 is installed on one side of the inclined plate 621.

[0050] After the workpiece enters the side plate 612, the edge position of the workpiece moves along the side wall of the side plate 612. At this time, the workpiece contacts and squeezes the inclined plate 621, causing the inclined plate 621 to gradually move into the mounting groove 613. At the same time, the extrusion plate 624 follows the inclined plate 621 into the mounting groove 613. After the workpiece passes over the inclined plate 621, the inclined plate 621 gradually returns to its original position. At this time, the edge position of the workpiece abuts against the second inclined surface on the extrusion plate 624. As the inclined plate 621 continues to move, the workpiece gradually moves along the second inclined surface on the extrusion plate 624 to the top of the extrusion plate 624. At this time, the two workpieces are clamped under the action of the spring 1 623.

[0051] like Figures 4 to 6 As shown, the extrusion assembly 63 includes a movable frame 631, which is in an I-shaped shape. In the initial state, one side of the movable frame 631 is located at the same horizontal plane as the inner side of the side plate 612, and a groove is provided on the side plate 612 for the movable frame 631 to slide into the installation groove 613. Both sides of the top of the movable frame 631 penetrate the bottom of the inclined plate 621 and extend to the inside of the inclined plate 621. Two sliding columns 632 are installed at the bottom of the other side of the movable frame 631. The two sliding columns 632 are respectively arranged at two edge positions of the movable frame 631, and one end of the sliding column 632 is rollingly connected with a ball 633. The sliding column 632 is slidably connected to the adjustment mechanism 50.

[0052] Guide rods 634 are installed on both sides of the top of the movable frame 631. The guide rods 634 are T-shaped. A top plate 636 is slidably connected to the outer side of the top of the guide rods 634. The top of the top plate 636 passes through the extrusion plate 624 and extends to the inside of the extrusion plate 624 located at the edge of the inclined plate 621. The top plate 636 is in an inverted L shape to prevent the top plate 636 from slipping off the extrusion plate 624. A limiting groove 637 for the guide rods 634 to slide is provided inside the top plate 636. A spring 3 635 is sleeved on the outer side of the guide rod 634. The spring 3 635 is installed between the movable frame 631 and the top plate 636 to drive the top plate 636 to reset.

[0053] When the side plate 612 is moving, the slide column 632 can be moved upward under the action of the adjustment mechanism 50. At this time, the slide column 632 drives the top plate 636 to move upward through the guide rod 634 on the movable frame 631. When the top plate 636 moves upward, it can contact the inner top wall of the extrusion plate 624. As the extrusion plate 624 continues to move upward, the two workpieces can be further clamped by the extrusion plate 624 to maintain the stability of the workpieces.

[0054] like Figures 1 to 4As shown, the driving mechanism 30 includes a guide rail 1 31, a lead screw 32, a motor 2 33, a guide rail 2 34 and a slide bar 35. The head ends of the guide rail 1 31 and the guide rail 2 34 are respectively mounted on both sides of the material box 2 12, and two roll welders 40 are respectively arranged at the ends of the guide rail 1 31 and the guide rail 2 34, and the bottoms of the guide rail 1 31 and the guide rail 2 34 are both in contact with the ground through support legs. One end of the lead screw 32 is rotatably connected to one side of the inner wall of the guide rail 1 31, the motor 2 33 is mounted on one side of the guide rail 1 31, the driving shaft of the motor 2 33 is fixed to the other end of the lead screw 32, and the lead screw 32 is threadedly connected to one of the sliders 64. The two ends of the slide bar 35 are respectively mounted on both sides of the inner wall of the guide rail 2 34, and the other slider 64 is slidably connected to the outside of the slide bar 35.

[0055] The motor 2 33 drives the side plate 612 to approach the seam welder 40 through the slider 64 on the lead screw 32, so as to drive the two clamped workpieces to approach the seam welder 40. When the seam welder 40 starts to weld the workpieces, the motor 2 33 rotates in the opposite direction to drive the side plate 612 to gradually reset.

[0056] like Figure 1 and Figures 3 to 5 As shown, the adjustment mechanism 50 includes four transverse plates 51, and the four transverse plates 51 correspond one by one to the movable frames 631 in the four extrusion assemblies 63, two of which are distributed up and down on the inner side of the guide rail 1 31, and the other two transverse plates 51 are distributed up and down on the inner side of the guide rail 2 34.

[0057] like Figures 5 to 7 As shown, a guide groove 52 for sliding the slide column 632 is provided on one side of the horizontal plate 51 facing the slide column 632, and the ball bearing 633 contacts the inner side wall of the guide groove 52. The guide groove 52 has a long strip groove and a short strip groove, and the end of the long strip groove in the guide groove 52 is connected to the head end of the short strip groove through a vertical groove. A through groove 57 is provided between the long strip groove and the short strip groove in the guide groove 52, so that the slide column 632 can enter the short strip groove from the long strip groove. A connecting groove 53 is provided on one side of the horizontal plate 51 near the end of the short strip groove of the guide groove 52, and a slope 54 is provided at the end of the short strip groove in the guide groove 52 and the end of the connecting groove 53, so that the ball bearing 633 can move out of the guide groove 52 or the connecting groove 53 along the slope 54. The leading end and the bottom of the long strip groove in the guide groove 52 are both provided with an inclined groove 55 from top to bottom. In the initial state, the two slide posts 632 on the movable frame 631 are located in the inclined groove 55, and the inclined groove 55 on the bottom of the long strip groove on the guide groove 52 is connected to the leading end of the connecting groove 53. The ends of the two inclined grooves 55 are both provided with through holes 56 penetrating the horizontal plate 51, so that the slide posts 632 extend out of the horizontal plate 51.

[0058] Working principle: the workpieces in material box 1 11 and material box 2 12 are respectively sent to the side plate 612. At this time, the workpiece moves along the side wall of the side plate 612 to squeeze the inclined plate 621, so that the inclined plate 621 gradually moves into the installation groove 613. When the inclined plate 621 enters the installation groove 613, the inclined plate 621 drives the sliding column 632 to enter the through hole 56 through the movable frame 631. At the same time, the extrusion plate 624 follows the inclined plate 621 to enter the installation groove 613. After the workpiece passes over the inclined plate 621, the inclined plate 621 gradually returns to its original position. At this time, the workpiece abuts against the second inclined surface on the extrusion plate 624. As the inclined plate 621 continues to move, the workpiece gradually moves along the second inclined surface on the extrusion plate 624 to the top of the extrusion plate 624 to clamp the two workpieces.

[0059] Then the side plate 612 drives the workpiece to approach the seam welding machine 40. During the movement of the side plate 612, the positioning plate 17 contacts the clamped workpiece to align the workpiece. Then the telescopic member 16 drives the positioning plate 17 to move downward. Subsequently, the side plate 612 continues to move, so that the slide column 632 moves along the inclined groove 55 to the guide groove 52. At the same time, the slide column 632 drives the top plate 636 to move upward through the guide rod 634 on the movable frame 631 to push the extrusion plate 624, so that the extrusion plate 624 further clamps the two workpieces to keep the workpieces stable.

[0060] When the workpiece contacts the seam welder 40, the two slide posts 632 move downward through the vertical slot and the through slot 57 on the guide slot 52 respectively, so that the top plate 636 is away from the inner top wall of the extrusion plate 624 to release the further clamping of the workpiece. The workpiece is clamped only by the elastic force of the spring 1 623. Then the seam welder 40 starts to weld the workpiece, and the motor 2 33 drives the side plate 612 to reset, so that the extrusion plate 624 on the inclined plate 621 gradually separates from the workpiece. During the resetting of the side plate 612, the slide post 632 that first contacts the slope 54 in the guide slot 52 enters the connecting slot 53 and continues to move along the connecting slot 53. When the other slide post 632 enters the connecting slot 53 along the slope 54 in the guide slot 52, the side plate 612 is completely reset.

[0061] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A welding device for a heat exchanger of a coating equipment, comprising a feeding mechanism and two seam welders, characterized in that: A driving mechanism is provided on the outer side of the feeding mechanism, a positioning mechanism for clamping the workpiece is provided on the driving mechanism, and an adjusting mechanism for adjusting the positioning mechanism is provided on the inner side of the driving mechanism; The positioning mechanism includes a sliding assembly arranged on the driving mechanism, four limit assemblies respectively slidably arranged on both sides of the inner wall of the sliding assembly, and four extrusion assemblies respectively slidably arranged on the four limit assemblies, and every two limit assemblies are arranged opposite to each other to clamp the edge of the workpiece; The limit assembly includes an inclined plate elastically slidably connected to the inner side wall of the sliding assembly in the transverse direction and a plurality of extrusion plates elastically slidably connected to the inclined plate in the vertical direction. The extrusion plate is used to clamp the workpiece. The inclined plate has an inclined surface 1 which gradually inclines toward the side wall of the sliding assembly from top to bottom. The extrusion plate has an inclined surface 2 which gradually inclines toward the side wall of the sliding assembly from bottom to top. Two workpieces can contact along the inclined surface 1 on the inclined plate and the inclined surface 2 on the extrusion plate. The extrusion assembly includes a movable frame vertically slidably arranged on the inclined plate, two sliding columns slidably arranged in the adjustment mechanism are installed on the movable frame, top plates elastically slidably connected to the movable frame along the vertical direction are installed on both sides of the top of the movable frame to push the extrusion plate, guide rods are installed on both sides of the top of the movable frame, the top plate is slidably connected to the outside of the top end of the guide rod, and the top of the top plate penetrates the extrusion plate and extends to the inside of the extrusion plate located at the edge of the inclined plate to clamp the two ends of the workpiece; The adjustment mechanism includes four horizontal plates, and the four horizontal plates correspond to the movable frames in the four extrusion assemblies respectively. A guide groove is provided on one side of the horizontal plate, and the guide groove has a long strip groove and a short strip groove. The end of the long strip groove in the guide groove is connected with the head end of the short strip groove through a vertical groove. A through groove is provided between the long strip groove and the short strip groove in the guide groove. A connecting groove is provided on the horizontal plate near the end of the short strip groove of the guide groove. The end of the short strip groove in the guide groove and the end of the connecting groove are both provided with slopes. The head end and one side of the bottom of the long strip groove in the guide groove are both provided with inclined grooves, and the inclined groove on one side of the bottom of the long strip groove on the guide groove is connected with the connecting groove.

2. The welding device for a heat exchanger of a coating equipment according to claim 1, characterized in that: The feeding mechanism includes a material box one and a material box two which are arranged opposite to each other. The material box two is located at the bottom of the material box one. The interior of the material box two is slidably connected with a support plate for driving the workpiece to move upward. A telescopic part two is installed on one side of the material box two, and a positioning plate for aligning the workpiece is installed on the telescopic part two.

3. The welding device for a heat exchanger of a coating equipment according to claim 2, characterized in that: A clamping mechanism is provided on the material box, and the clamping mechanism includes a clamping assembly and two blocking assemblies. The clamping assembly includes clamping plates slidably arranged at the bottom of both sides of the material box to clamp the workpiece, and the blocking assembly includes a baffle plate slidably arranged at the bottom of the clamping plate to release the workpiece.

4. The welding device for a heat exchanger of a coating equipment according to claim 3, characterized in that: The sliding assembly includes a connecting plate and two side plates installed on the connecting plate. Two upper and lower mounting grooves are provided on the inner side of the side plate. The four limit assemblies are respectively arranged in pairs in the two mounting grooves of the two side plates. The top of the side plate contacts the bottom of the baffle, the bottom of the side plate contacts the top of the second material box, and the side plate is connected to the driving mechanism.

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