A laser welding platform for SMT processing

Abstract

The application discloses a kind of laser welding platforms for SMT processing, it is related to SMT laser welding processing technical field, including welding table body;Further include: the top surface left side of welding table body is provided with main feeding mechanism, and main feeding mechanism contains feeding round frame, and the top end outside of feeding round frame is installed with the feeding platform of bearing solder paste steel net at equal angle;The upper portion in the inside of feeding round frame is provided with sub-feeding mechanism, and sub-feeding mechanism contains feeding box;Wherein, the top surface right side of welding table body is provided with welding mechanism, and welding mechanism contains welding positioning frame.The SMT processing laser welding platform, when the inside of feeding box is intermittently sent down to the ladder heightening net, feeding platform rotates and drives synchronous rotation with solder paste steel net, so as to push horizontal rod and drive ladder heightening net sliding between solder paste steel net corresponding to each other, by welding positioning frame and intelligent welding head point welding, realize intelligent welding and reduce the error of human intervention.

Description

Technical Field

[0001] This invention relates to the field of SMT laser welding processing technology, specifically to a laser welding platform for SMT processing. Background Technology

[0002] SMT soldering, commonly known as the core process in surface mount technology, refers to the technique of directly soldering electronic components onto the surface of a printed circuit board (PCB) using solder paste. Unlike traditional through-hole mounting technology, SMT components are mounted on the PCB surface via pads, saving space and being suitable for high-density assembly. During the placement process, a stencil is placed over the PCB surface, and then solder paste is applied. The solder paste is pre-reserved on the PCB surface through the solder holes on the stencil, so that the electronic components can be connected to the PCB by heating the solder paste. Different types of stencils (with varying thicknesses) can reserve different thicknesses of solder paste during soldering, thus enabling the soldering of different types of electronic components with different requirements. This type of stencil is also called a stepped stencil, and it is generally manufactured using laser welding.

[0003] The invention disclosed in CN116604186B is a laser welding equipment for SMT stepped stencils. The laser welding gun is mounted on a multi-axis robotic arm, which is used to move the laser welding gun. It also includes a gripping mechanism, a clamping device, a platform, a cross slide, a sliding plate, and a support plate. The clamping device includes a magnetic adsorption device and an iron block. The gripping mechanism is mounted on the support plate and has a gripping function.

[0004] The invention disclosed in CN111230300A is an SMT stepped template welding method and apparatus. In this welding method, the direction of the laser is adjusted by a galvanometer and the focusing of the field lens, and the spot is focused on the steel sheet splicing point to melt and weld the surface. The weld points are scanned in turn according to the central symmetrical position of the locally thickened or thinned steel sheet, which can minimize the heat effect. By reducing the heat effect of the welding process, the warping and deformation of the steel sheet is avoided. After welding one surface, the SMT stepped template is flipped to weld the other surface.

[0005] However, the laser welding equipment for stepped stencils disclosed above still has the following problems in actual use: the stepped heightening mesh and the solder paste stencil are grasped and distributed accordingly by a mechanical gripper. During the welding process, the mechanical gripper is also needed for positioning. However, the sides of the stepped heightening mesh are blocked by the mechanical gripper, making it impossible to position and connect them through laser welding. This affects the stability of the connection between the stepped heightening mesh and the solder paste stencil. The feeding achieved by the mechanical gripper also affects the welding efficiency.

[0006] Therefore, we propose a laser welding platform for SMT processing to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a laser welding platform for SMT processing. This addresses the problem that existing methods use mechanical grippers to grasp and distribute stepped riser mesh and solder paste stencil, requiring positioning by the mechanical gripper during welding. However, the sides of the stepped riser mesh are blocked by the mechanical gripper, making it impossible to position and connect them via laser welding, thus affecting the stability of the connection between the stepped riser mesh and the solder paste stencil. Furthermore, the feeding achieved by the mechanical gripper also affects welding efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a laser welding platform for SMT processing, comprising a welding table body and a gas supply and delivery box for laser welding fixedly installed on the right side of the top surface of the welding table body; further comprising:

[0009] The main feeding mechanism is provided on the left side of the top surface of the welding table body, and the main feeding mechanism includes a feeding circular frame, and a feeding platform for carrying solder paste stencil is installed at an equal angle on the outer side of the top of the feeding circular frame.

[0010] An auxiliary feeding mechanism is provided above the inside of the feeding circular frame, and the auxiliary feeding mechanism includes a feeding box, and the inside of the feeding box is arranged with intermittently placed stepped raising nets at equal intervals.

[0011] The welding station body has a welding mechanism on the top right side, which includes a welding positioning frame. The inner wall of the welding positioning frame is fixedly equipped with intelligent welding heads at equal intervals.

[0012] Preferably, the main feeding mechanism includes a supporting bottom ring, which is fixedly installed on the left side of the top surface of the welding table body. The supporting bottom ring is rotatably connected to the bottom recess of the feeding circular frame through the upper protrusion. The inner wall of the bottom end of the feeding circular frame is fixedly installed with driving tooth blocks at equal angles. At the same time, the inside of the feeding circular frame above the welding table body is provided with a driving shaft through a bearing.

[0013] Preferably, the main feeding mechanism includes a drive gear fixedly installed on the outer wall below the drive shaft, and the drive gear is meshed with a drive gear block inside the lower part of the feeding frame, and the upper end of the drive shaft is rotatably installed inside the lower part of the feeding box included in the auxiliary feeding mechanism through a bearing.

[0014] Preferably, the auxiliary feeding mechanism includes a feeding box fixedly installed on the top left side of the welding table body, and feeding tracks are provided on both the left and right sides inside the feeding box. Feeding shafts are meshed on both the upper and lower sides inside the feeding tracks. The feeding shafts are rotatably installed inside the feeding box through bearings. Meanwhile, positioning crossbars are fixedly installed at equal intervals on the outer wall of the feeding track. The positioning crossbars separate the stepped heightening net and convey it downward. The feeding shaft and the drive shaft are connected to each other through a transmission bevel gear set.

[0015] Preferably, the auxiliary feeding mechanism includes a push base plate, which is fixedly installed on the lower right side of the feeding box. The bottom surface of the push base plate is provided with a drive guide wheel through a torsion spring. The drive guide wheel and the feeding round frame are in contact with each other to achieve synchronous rotation. At the same time, a guide threaded rod is fixedly installed on the left end of the drive guide wheel. The top surface of the push base plate is at a higher level than the top surface of the feeding platform.

[0016] Preferably, the auxiliary feeding mechanism includes a push crossbar, which is slidably installed on the bottom surface inside the feeding box, and the push crossbar is threadedly connected to the guide threaded rod, so that the push crossbar drives the stepped heightening net deployed by the feeding track to move to the right to the outside of the feeding round frame.

[0017] Preferably, the welding mechanism includes a reciprocating threaded rod, which is rotatably mounted on the right side of the top surface of the welding table body via a bearing. The left side of the bottom end of the reciprocating threaded rod is meshed with the right end of the transmission shaft via a main bevel gear set. The left end of the transmission shaft is rotatably disposed inside the support bottom ring via a bearing, and the left end of the transmission shaft is meshed with the bottom end of the drive shaft via a secondary bevel gear set.

[0018] Preferably, the welding mechanism includes a lifting slide rod, which is fixedly installed on the front and rear sides of the right end of the top surface of the welding table body. The upper end of the lifting slide rod is slidably disposed at the front and rear ends of the right side of the welding positioning frame, and the middle of the right end of the welding positioning frame is threadedly connected to the reciprocating threaded rod.

[0019] Preferably, the welding mechanism includes a welding positioning frame that is vertically distributed on the right side of the feeding platform of the feeding round frame, and the bottom inner wall of the welding positioning frame is distributed in an inclined structure. The welding positioning frame slides downward, and the stepped raising mesh pushed out by the extrusion feeding mechanism corresponds to the solder paste stencil inside the feeding platform.

[0020] Preferably, an air supply pipe is fixedly connected to the top of the air supply box, and the upper end of the air supply pipe is fixedly connected to the welding positioning frame. The air supply pipe supplies welding gas to the intelligent welding head inside the welding positioning frame to achieve a protective effect, so that the intelligent welding heads distributed at equal intervals on the side can spot weld the stepped raising mesh to the solder paste stencil.

[0021] Compared with the prior art, the beneficial effects of this invention are as follows: When the feeding box intermittently feeds the internal stepped riser mesh downwards, the rotation of the feeding platform drives the solder paste stencil to rotate synchronously. This allows the push bar to slide the stepped riser mesh in alignment with the solder paste stencil, and spot welding is performed by the welding positioning frame and the intelligent welding head. This achieves intelligent welding and reduces errors caused by human intervention. The specific details are as follows:

[0022] 1. The feeding box stores materials through a stepped heightening mesh. The feeding conveyor inside the feeding box rotates the feeding shaft, which pulls the positioning crossbar and the stepped heightening mesh above it downwards to deliver materials, so as to achieve intermittent material supply during the corresponding welding process.

[0023] After the feeding track inside the feeding box moves the positioning crossbar to the bottom, the stepped raising net, which is supported by the positioning crossbar, is unrestricted and descends to the bottom of the feeding box for subsequent material pushing and discharging.

[0024] 2. The feeding shaft drives the drive shaft and drive gear to rotate, and the meshing drive gear blocks drive the feeding frame and feeding platform to rotate. The feeding platform, which is distributed at equal angles, drives the solder paste stencil to rotate, and thus corresponds to the stepped heightening mesh intermittently placed at the bottom of the feeding box.

[0025] The rotating feeding frame rubs against the drive guide wheel, causing the drive guide wheel and the guide threaded rod to rotate. The threaded push crossbar moves from left to right, causing the stepped raising mesh at the bottom of the feeding box to slide to the right, thus achieving subsequent docking with the solder paste stencil above the feeding platform.

[0026] 3. The transmission shaft drives the reciprocating threaded rod to rotate through the main bevel gear set so that when the solder paste stencil is changed, the threaded connection welding positioning frame rises, and then pushes the crossbar to drive the stepped heightening mesh to slide to the right. The welding positioning frame descends and squeezes the stepped heightening mesh to move into its interior, thereby achieving mutual positioning and docking.

[0027] The gas supply box delivers welding gas through a gas supply pipe to the inside of the intelligent welding head. The intelligent welding heads, which are evenly distributed, perform spot welding on the stepped height mesh and the solder paste stencil. The delivered gas prevents weld oxidation, improves welding quality, reduces spatter, and enhances the stability of stencil welding. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the feeding box of the present invention;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the feeding box of the present invention;

[0031] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0032] Figure 5 This is a schematic diagram of the structure of the present invention, which pushes the crossbar to move the stepped height-increasing net.

[0033] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0034] Figure 7 This is a schematic diagram of the structure of the feeding platform and welding positioning frame of the present invention;

[0035] Figure 8 This is a schematic diagram of the connection structure between the drive shaft and the transmission shaft of the present invention;

[0036] Figure 9 This is a three-dimensional structural diagram of the welding positioning frame of the present invention;

[0037] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C.

[0038] In the diagram: 1. Welding table body; 2. Air supply and conveying box; 3. Feeding round frame; 4. Feeding platform; 5. Feeding box body; 6. Stepped heightening net; 7. Welding positioning frame; 8. Intelligent welding head; 9. Support bottom ring; 10. Drive gear block; 11. Drive shaft; 12. Drive gear; 13. Feeding track; 14. Feeding shaft; 15. Positioning crossbar; 16. Pushing base plate; 17. Drive guide wheel; 18. Torsion spring; 19. Guide threaded rod; 20. Pushing crossbar; 21. Reciprocating threaded rod; 22. Main bevel gear group; 23. Transmission shaft; 24. Secondary bevel gear group; 25. Lifting slide bar; 26. Air supply pipe; 27. Transmission bevel gear group. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1-10 The present invention provides the following technical solution:

[0041] Example 1: To address the problems existing in laser soldering of SMT solder paste stencils, this example discloses the following technical solution: a laser soldering platform for SMT processing, comprising a soldering table body 1, a secondary feeding mechanism located above the inside of a feeding circular frame 3, the secondary feeding mechanism including a feeding box 5, and the feeding box 5 containing intermittently placed stepped heightening mesh 6 arranged at equal intervals; the feeding box 5 is fixedly installed on the top left side of the soldering table body 1, and feeding tracks 13 are provided on both the left and right sides inside the feeding box 5, and feeding shafts 14 are meshed on both the upper and lower sides inside the feeding tracks 13, and the feeding shafts 14 are rotatably installed inside the feeding box 5 via bearings, while positioning crossbars 15 are fixedly installed at equal intervals on the outer wall of the feeding tracks 13, which separate and downwardly feed the stepped heightening mesh 6; the feeding shafts 14 and the drive shafts 11 are connected to each other via a transmission bevel gear set 27.

[0042] The auxiliary feeding mechanism includes a push base plate 16, which is fixedly installed on the lower right side of the feeding box 5. The bottom surface of the push base plate 16 is rotatably equipped with a drive guide wheel 17 via a torsion spring 18. The drive guide wheel 17 and the feeding round frame 3 are in contact with each other to achieve synchronous rotation. At the same time, a guide threaded rod 19 is fixedly installed on the left end of the drive guide wheel 17. The top surface of the push base plate 16 is higher than the top surface of the feeding platform 4. The auxiliary feeding mechanism includes a push crossbar 20, which is slidably installed on the bottom surface inside the feeding box 5. The push crossbar 20 is threadedly connected to the guide threaded rod 19, so that the push crossbar 20 drives the stepped raising net 6 deployed by the feeding track 13 to move to the right to the outside of the feeding round frame 3.

[0043] like Figures 3-5 As shown, when laser welding the stepped solder paste stencil, the stepped heightening mesh 6 is stored in the feeding box 5 above the welding table body 1. Positioning crossbars 15 are fixedly installed at equal intervals on the outer walls of the feeding conveyor belts 13 on the left and right sides inside the feeding box 5 so that the stepped heightening mesh 6 can be supported by the positioning crossbars 15. There are gaps between adjacent stepped heightening meshes 6 so as to carry out subsequent intermittent feeding operations.

[0044] Furthermore, the drive motors on the left and right sides of the rear of the feeding box 5 operate, thereby driving the feeding shafts 14 on the left and right sides to rotate, so that the feeding track 13 connected to the outer wall and the positioning crossbar 15 rotate and move downward synchronously, so that the stepped raising net 6 supported by the positioning crossbar 15 moves to the bottom surface of the feeding box 5 for subsequent pushing and discharging.

[0045] Example 2: To solve the problems existing in the laser soldering of solder paste stencils in SMT, this example discloses the following technical solution: A main feeding mechanism is provided on the left side of the top surface of the soldering station body 1, and the main feeding mechanism includes a feeding circular frame 3, and a feeding platform 4 for carrying the solder paste stencil is installed at equal angles on the outer side of the top of the feeding circular frame 3; the main feeding mechanism includes a supporting bottom ring 9, and the supporting bottom ring 9 is fixedly installed on the left side of the top surface of the soldering station body 1, and the supporting bottom ring 9 is rotatably connected to the bottom recess of the feeding circular frame 3 through the upper protrusion, and a driving tooth block 10 is fixedly installed at equal angles on the inner wall of the bottom end of the feeding circular frame 3, and a driving shaft 11 is rotatably provided inside the feeding circular frame 3 above the soldering station body 1 through a bearing.

[0046] The main feeding mechanism includes a drive gear 12 fixedly installed on the outer wall below the drive shaft 11, and the drive gear 12 is meshed with the drive tooth block 10 inside the lower part of the feeding round frame 3. The upper end of the drive shaft 11 is rotatably installed inside the lower part of the feeding box 5 included in the auxiliary feeding mechanism through a bearing.

[0047] like Figures 5-7 As shown, the feeding shaft 14 drives the meshing drive shaft 11 to rotate through the transmission bevel gear group 27, so that the drive shaft 11 meshes with the drive gear block 10 through the drive gear 12 on the outer wall, driving the feeding round frame 3 and the feeding platform 4 to rotate, so that the feeding platform 4 drives the solder paste stencil inside to rotate and correspond to each other with the stepped heightening mesh 6.

[0048] Furthermore, during the rotation of the feeding round frame 3, it comes into contact with the drive guide wheel 17 on the bottom surface of the push base plate 16, causing the drive guide wheel 17 and the guide threaded rod 19 at the left end to rotate. The push crossbar 20, which is threadedly connected to the guide threaded rod 19, moves from left to right inside the feeding box 5. The push crossbar 20 causes the stepped raising mesh 6, which is in place after being unloaded from the feeding box 5, to slide to the right so that the stepped raising mesh 6 can move onto the push base plate 16 on the right side, thus achieving subsequent docking with the solder paste stencil above the feeding platform 4.

[0049] Example 3: To address the problems existing in laser welding of solder paste stencils in SMT, this example discloses the following technical solution and a gas supply box 2 fixedly installed on the right side of the top surface of the welding station body 1 for laser welding; wherein, a welding mechanism is provided on the right side of the top surface of the welding station body 1, and the welding mechanism includes a welding positioning frame 7, and intelligent welding heads 8 are fixedly installed at equal intervals on the inner wall of the welding positioning frame 7; the welding mechanism includes a reciprocating threaded rod 21, and the reciprocating threaded rod 21 is rotatably installed on the right side of the top surface of the welding station body 1 through a bearing, and the left side of the bottom end of the reciprocating threaded rod 21 is meshed with the right end of the transmission shaft 23 through a main bevel gear set 22, and the left end of the transmission shaft 23 is rotatably set inside the support bottom ring 9 through a bearing, and the left end of the transmission shaft 23 is meshed with the bottom end of the drive shaft 11 through a secondary bevel gear set 24.

[0050] The welding mechanism includes a lifting slide rod 25, which is fixedly installed on the front and rear sides of the right end of the top surface of the welding table body 1. The upper end of the lifting slide rod 25 is slidably connected to the front and rear ends of the right side of the welding positioning frame 7. The middle of the right end of the welding positioning frame 7 is threadedly connected to the reciprocating threaded rod 21. The welding positioning frame 7 and the feeding platform 4 on the right side of the feeding round frame 3 are distributed vertically and vertically. The inner wall of the bottom surface of the welding positioning frame 7 is distributed in an inclined structure. The welding positioning frame 7 slides downward, and the stepped heightening mesh 6 pushed out by the extrusion feeding mechanism corresponds to the solder paste stencil inside the feeding platform 4. The top of the air supply and delivery box 2 is fixedly connected to an air supply pipe 26, and the upper end of the air supply pipe 26 is fixedly connected to the welding positioning frame 7. The air supply pipe 26 supplies welding air to the intelligent welding head 8 inside the welding positioning frame 7 to achieve a protective effect, so that the intelligent welding heads 8 distributed at equal intervals on the side can spot weld the stepped heightening mesh 6 to the solder paste stencil.

[0051] like Figures 7-10As shown, when the drive shaft 11 inside the feeding ring 3 rotates, it drives the meshing transmission shaft 23 to rotate through the auxiliary bevel gear group 24 at the bottom. The transmission shaft 23 drives the meshing reciprocating threaded rod 21 to rotate through the main bevel gear group 22 at the right end. So that during the process of the feeding ring 3 driving the feeding platform 4 at the outer end to change the solder paste stencil, the reciprocating threaded rod 21 drives the threaded welding positioning frame 7 to slide upward along the lifting slide rod 25, and drives the solder paste stencil to move at the next feeding platform 4. Upon reaching the corresponding position, the push bar 20 drives the stepped heightening mesh 6 to slide to the right, causing the descending welding positioning frame 7 to move the stepped heightening mesh 6 into its interior by pressing it against the inclined surface at the bottom, so that the stepped heightening mesh 6 and the solder paste stencil correspond to each other. Then, the welding gas is delivered to the intelligent welding head 8 through the gas supply delivery box 2 and the gas supply pipe 26. This prevents weld oxidation, improves welding quality, reduces spatter, and enhances the stability of stencil welding when the intelligent welding head 8 welds the stepped heightening mesh 6 and the solder paste stencil.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser welding platform for SMT processing, comprising a welding table body (1) and a gas supply box (2) fixedly installed on the right side of the top surface of the welding table body (1) for laser welding. Its features are, Also includes: The main feeding mechanism is provided on the left side of the top surface of the welding table body (1), and the main feeding mechanism includes a feeding round frame (3), and a feeding platform (4) for carrying solder paste stencil is installed at an equal angle on the outer side of the top of the feeding round frame (3). The upper part of the feeding round frame (3) is provided with a secondary feeding mechanism, and the secondary feeding mechanism includes a feeding box (5), and the feeding box (5) is provided with intermittently placed stepped heightening nets (6) arranged at equal intervals inside. Among them, a welding mechanism is provided on the right side of the top surface of the welding station body (1), and the welding mechanism includes a welding positioning frame (7), and intelligent welding heads (8) are fixedly installed at equal intervals on the inner wall of the welding positioning frame (7). The main feeding mechanism also includes a support bottom ring (9), and the support bottom ring (9) is fixedly installed on the left side of the top surface of the welding table body (1). The support bottom ring (9) is rotatably connected to the bottom recess of the feeding round frame (3) through the upper protrusion. The inner wall of the bottom end of the feeding round frame (3) is fixedly installed with a drive tooth block (10) at the same angle. At the same time, the inside of the feeding round frame (3) above the welding table body (1) is provided with a drive shaft (11) through a bearing. The main feeding mechanism also includes a drive gear (12) fixedly installed on the outer wall below the drive shaft (11), and the drive gear (12) meshes with the drive tooth block (10) inside the lower part of the feeding round frame (3), and the upper end of the drive shaft (11) is rotatably installed inside the lower part of the feeding box (5) included in the auxiliary feeding mechanism through a bearing. The welding mechanism also includes a reciprocating threaded rod (21), which is rotatably mounted on the right side of the top surface of the welding table body (1) via a bearing. The left side of the bottom end of the reciprocating threaded rod (21) is meshed with the right end of the transmission shaft (23) via a main bevel gear set (22). The left end of the transmission shaft (23) is rotatably set inside the support bottom ring (9) via a bearing. At the same time, the left end of the transmission shaft (23) is meshed with the bottom end of the drive shaft (11) via a secondary bevel gear set (24). The welding mechanism also includes a lifting slide rod (25), and the lifting slide rod (25) is fixedly installed on the front and rear sides of the right end of the top surface of the welding table body (1). The upper end of the lifting slide rod (25) is slidably connected to the front and rear ends of the right side of the welding positioning frame (7). The middle part of the right end of the welding positioning frame (7) is threadedly connected to the reciprocating thread rod (21). The welding mechanism includes a welding positioning frame (7) and a feeding platform (4) on the right side of the feeding round frame (3), which are distributed vertically. The bottom inner wall of the welding positioning frame (7) is distributed in an inclined structure. The welding positioning frame (7) slides down to squeeze the stepped raising mesh (6) pushed out by the auxiliary feeding mechanism, so that the stepped raising mesh (6) corresponds to the solder paste stencil inside the feeding platform (4).

2. The laser welding platform for SMT processing according to claim 1, characterized in that: The auxiliary feeding mechanism includes a feeding box (5) which is fixedly installed on the left side of the top surface of the welding table body (1). The feeding box (5) is provided with feeding tracks (13) on both the left and right sides inside. The feeding tracks (13) are provided with feeding shafts (14) on both the upper and lower sides inside. The feeding shafts (14) are rotatably installed inside the feeding box (5) through bearings. Meanwhile, positioning crossbars (15) are fixedly installed at equal intervals on the outer wall of the feeding track (13). The positioning crossbars (15) are used to separate the stepped heightening net (6) and deliver it downwards. The feeding shafts (14) and the drive shafts (11) are connected to each other through a transmission bevel gear set (27).

3. The laser welding platform for SMT processing according to claim 2, characterized in that: The auxiliary feeding mechanism also includes a push base plate (16), and the push base plate (16) is fixedly installed on the lower right side of the feeding box (5). The bottom surface of the push base plate (16) is provided with a drive guide wheel (17) through a torsion spring (18). The drive guide wheel (17) and the feeding round frame (3) are in contact with each other to achieve synchronous rotation. At the same time, a guide thread rod (19) is fixedly installed on the left end of the drive guide wheel (17). The top surface of the push base plate (16) is higher than the top surface of the feeding platform (4).

4. The laser welding platform for SMT processing according to claim 3, characterized in that: The auxiliary feeding mechanism also includes a pusher bar (20), which is slidably installed on the bottom surface inside the feeding box (5). The pusher bar (20) is threadedly connected to the guide threaded rod (19), so that the pusher bar (20) drives the stepped heightening net (6) deployed by the feeding track (13) to move to the right to the outside of the feeding round frame (3).

5. The laser welding platform for SMT processing according to claim 1, characterized in that: The top of the gas supply box (2) is fixedly connected to a gas supply pipe (26), and the upper end of the gas supply pipe (26) is fixedly connected to the welding positioning frame (7). The gas supply pipe (26) supplies gas to the intelligent welding head (8) inside the welding positioning frame (7) to achieve a protective effect, so that the equally distributed intelligent welding heads (8) spot weld the stepped heightening mesh (6) to the solder paste stencil.

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