Automatic welding device

Abstract

The invention discloses an automatic welding device, including a frame, on which: a welding mechanism, which includes an upper welding head fixture and a lower welding head fixture, wherein the upper welding head fixture is provided with an upper welding head, and the lower welding head fixture is provided with a lower welding head, wherein the upper welding head and the lower welding head are respectively connected to the positive and negative poles of a welding part transformer; a workpiece feeding mechanism, which is used to convey the workpieces to be welded one by one to the bottom of the upper welding head; a welding part feeding mechanism, which is used to convey the welding parts one by one to the top of the lower welding head; a driving mechanism, which is used to drive the lower welding head to move toward the upper welding head until the welding part contacts and conducts with the workpiece to generate a welding arc to achieve welding fixation; and a controller, wherein the controller is electrically connected to the welding mechanism, the workpiece feeding mechanism, the welding part feeding mechanism and the driving mechanism to achieve automatic control of the welding process. The invention discloses a welding device with high welding precision, high efficiency and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to an automatic welding device. Background Art

[0002] like Figure 1 As shown, a valve connector 100 in the prior art includes a tubular connector 100.1 and a valve block 100.2. A valve core 101 is provided at the bottom of the inner cavity of the tubular connector 100.1. Since the valve core 101 has a small outer diameter and is a tubular body with through holes, it is difficult to process and mold it in one go, and the cost is high. Therefore, in the actual production process, the valve core 101 is usually connected to the bottom of the inner cavity of the tubular connector 100.1 by welding in the later stage to form a complete valve connector 100. In actual applications, although the shape and structure of the tubular connector 100.1 are consistent, the shape of the valve block 100.2 is varied and not a unique shape. Therefore, it is difficult to automatically feed the valve connector 100 and the valve core 101 separately in the form of a vibration disk, because each valve connector 100 with a different structure needs to replace a vibration disk, which is costly and complex in structure. Therefore, in traditional processing and production, it is usually achieved through manual welding, but manual welding has defects such as poor welding accuracy, high scrap rate, and low welding efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an automatic welding device with high welding precision, high efficiency and low cost.

[0004] The technical solution adopted by the present invention is: to provide an automatic welding device, including a frame, on the top plate of the frame is provided:

[0005] The welding mechanism comprises an upper welding head fixture and a lower welding head fixture, wherein the upper welding head fixture is provided with an upper welding head, and the lower welding head fixture is provided with a lower welding head, and the upper welding head and the lower welding head are respectively connected to the positive and negative poles of the welding part transformer;

[0006] A workpiece feeding mechanism is used to transport the workpieces to be welded one by one to just below the upper welding head;

[0007] A welding part feeding mechanism is used to convey the welding parts one by one to a position above the lower welding head;

[0008] A driving mechanism is used to drive the lower welding head to move toward the upper welding head until the welding piece and the workpiece are in contact and connected to generate a welding arc to achieve welding fixation;

[0009] The controller is electrically connected to the welding mechanism, the workpiece feeding mechanism, the welding piece feeding mechanism and the driving mechanism to realize automatic control of the welding process.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] In the welding device of the present invention, the workpiece is automatically transferred to the position of the upper welding head, the weldment is transferred to the position of the lower welding head, and the lower welding head tooling is driven to move toward the upper welding head position by a corresponding driving mechanism until the weldment and the workpiece are simultaneously positioned at the corresponding positive and negative positions in the welding structure. When the two are in contact and connected, the arc is released to achieve automatic welding and fixing. During the process, no manual positioning is required to avoid human errors. In addition, the coaxiality of the weldment and the workpiece is guaranteed after each welding through the mechanized transmission and positioning method, that is, the welding accuracy is guaranteed, and the product qualification rate is effectively improved.

[0012] Furthermore, the workpiece feeding mechanism includes a mounting frame, a divider is provided on the mounting frame, a material distribution plate is provided on the output shaft of the divider, and a plurality of limit grooves for inserting and placing the workpieces are evenly distributed along the circumference on the outer edge of the material distribution plate. In this structure, the structure of the limit groove matches the shape of the tubular connector of the workpiece, that is, the clamping and feeding of workpieces of various shapes can be realized, and the versatility is strong.

[0013] As an improvement, the upper welding head tooling includes a fixed base, and the upper welding head is arranged on the fixed base; the lower welding head tooling includes a mounting plate slidably arranged on the top plate, and the mounting plate is provided with a mounting block that can slide vertically, and the lower welding head is vertically arranged on the mounting block, and the upper end of the lower welding head is provided with a plug-in slot for inserting the welding part.

[0014] Further improved, the driving mechanism includes a first driving cylinder and a second driving cylinder, the first driving cylinder is horizontally fixed on the base plate, and the piston rod of the first driving cylinder is connected to the end of the mounting plate; the second driving cylinder is vertically arranged below the mounting plate, and an avoidance through hole is provided on the base plate, the lower end of the second driving cylinder slides through the avoidance through hole, and the piston rod of the second driving cylinder passes upward through the mounting plate and is connected to the mounting block.

[0015] Further improved, the welding part feeding mechanism includes a vibration plate and a mounting seat, a feeding mold and a feeding drive cylinder driving the feeding mold to slide horizontally are slidably provided on the mounting seat, and a slot is provided on the feeding mold. When the welding part in the vibration plate is transported to the slot, the feeding drive cylinder drives the feeding mold to move toward the lower welding head until the welding part is located directly above the lower welding head.

[0016] In a further improvement, the lower welding head tooling further comprises a mid-position pressure-maintaining valve, which is connected to the first driving cylinder. The provision of the mid-position pressure-maintaining valve enables the piston rod of the corresponding driving cylinder to stop at a mid-position, thereby achieving corresponding action requirements.

[0017] Further improvement, the mounting frame is also provided with a discharge lever and a hopper. The discharge lever is inclinedly arranged near the outer edge of the distribution plate and is located in front of the rotation direction of the welding mechanism. The hopper is arranged below the discharge lever. As the distribution plate rotates, the welded workpiece is gradually separated from the limiting groove under the limiting guiding action of the discharge lever until it falls into the hopper.

[0018] In a further improvement, a limiting mechanism is further provided on the frame. When the material distribution plate is rotated to the point where the workpiece is directly below the upper welding head, the limiting mechanism is pressed and limited on the outer wall of the workpiece to keep it fixed. Since the aperture of the limiting groove on the material distribution plate is larger than the insertion shaft component of the workpiece, that is, the workpiece has a movable gap in the limiting groove, the setting of the limiting mechanism prevents the workpiece from being offset during welding, thereby improving the welding accuracy.

[0019] In a further improvement, the limiting mechanism includes a positioning pressure rod and a positioning drive cylinder driving the positioning pressure rod to move horizontally; the material distribution plate is provided with a guide seat, the guide seat is provided with a guide hole, and the end of the positioning pressure rod away from the positioning drive cylinder is slidably inserted into the guide hole. The limiting mechanism is also provided with a corresponding guide seat and a guide hole, so that the positioning pressure rod maintains better linearity and stability during movement, thereby ensuring stable compression and limiting of the workpiece.

[0020] Further improved, the top plate is also provided with a buffer limit mechanism for resisting and buffering the horizontal movement of the mounting plate; and the extension length of the resisting block on the buffer limit mechanism is adjustable. The buffer mechanism is used to buffer and prevent collision of the operation of the mounting plate to increase the service life of the equipment. In addition, the extension length of the resisting block on the buffer limit mechanism for direct contact with the mounting plate is adjustable, that is, the horizontal movement stroke of the mounting plate can be adjusted to improve the accurate control of the running distance, thereby ensuring the precise alignment of the lower welding head and the upper welding head, and ensuring the coaxiality of the welded part and the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structure of a workpiece in the prior art.

[0022] Figure 2 It is a welded part structure in the prior art.

[0023] Figure 3 It is a three-dimensional structural diagram of an automatic welding device of the present invention.

[0024] Figure 4 It is a top view of an automatic welding device of the present invention.

[0025] Figure 5 yes Figure 4 AA section view in.

[0026] Figure 6 yes Figure 5 Enlarge the organization diagram at X in the figure.

[0027] Figure 7 It is a structural diagram of the workpiece feeding mechanism and the limiting mechanism in the present invention.

[0028] Figure 8 It is a structural diagram of the material distribution tray in the present invention.

[0029] Fig. 9 It is a structural diagram of the welding piece feeding mechanism in the present invention.

[0030] Fig.10 It is a structural diagram of the feeding mold in the present invention.

[0031] Among them, 100-workpiece, 101-weldment;

[0032] Frame, 2-top plate, 3-upper welding head, 4-lower welding head, 4.1-socket slot, 5-mounting frame, 6-divider, 7-distribution plate, 7.1-limiting slot, 8-fixed base, 9-mounting plate, 10-mounting block, 11-first drive cylinder, 12-second drive cylinder, 13-vibration plate, 14-mounting seat, 15-feeding mold, 15.1-card slot, 16-feeding drive cylinder, 17-mid-position pressure maintaining valve, 18-unloading lever, 19-hopper, 20-positioning pressure rod, 21-positioning drive cylinder, 22-guide seat, 22.1-guide hole, 23-resistance block, 24-magnet, 25-welding transformer, 26-welding control box, 27-gas storage tank, 28-gas source processor, 29-control box, 30-touch screen, 31-linear guide rail, 32-fixed bracket. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] In the description of the present invention, it should be noted that the terms "directly above", "upper and lower", "upper end", "lower end", "outer edge" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and to distinguish each other, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 3 , 4 As shown, the present invention provides an automatic welding device, including a frame 1, and a top plate 2 of the frame 1 is provided with:

[0037] The welding mechanism is used to realize automatic welding of the workpiece 100 and the welding piece 101. Specifically, it includes an upper welding head fixture and a lower welding head fixture. The upper welding head fixture is provided with an upper welding head 3, and the lower welding head fixture is provided with a lower welding head 4. In addition, in this structure, the upper welding head 3 and the lower welding head 4 are both electrically connected to the corresponding welding transformer 25 and controlled by the welding piece control box 26. That is, when the upper welding head 3 and the lower welding head 4 touch and conduct, a welding arc is automatically generated, which causes the welding piece 101 in the lower welding head 4 to be welded to the corresponding position on the workpiece 100 directly below the upper welding head 3, thereby realizing automatic touch welding.

[0038] A workpiece feeding mechanism is used to transport the workpieces 100 to be welded one by one to the bottom of the upper welding head 3;

[0039] A welding piece feeding mechanism, used to convey the welding pieces 101 one by one to the top of the lower welding head 4;

[0040] The driving mechanism drives the lower welding head tooling to operate the welding piece 101 and the workpiece 100 until they are in contact and connected to generate a welding arc to achieve welding fixation after the welding piece 101 is conveyed to the lower welding head 4;

[0041] The controller is electrically connected to the welding mechanism, the workpiece feeding mechanism, the weldment feeding mechanism and the driving mechanism to realize automatic control of the welding process. Specifically, the controller is installed in a control box 29, and a touch screen 30 electrically connected to the controller is provided on the outer wall of the control box 29. The operation is simple through touch control. Of course, in other embodiments, the operation of each driving component can also be realized through multiple mechanical control buttons.

[0042] Specifically, in this embodiment, Figure 7 , 8As shown, the workpiece feeding mechanism includes a mounting frame 5, on which a divider 6 is disposed. Specifically, the divider 6 is a cam divider, on the output shaft of the divider 6 a material distribution plate 7 is disposed, and the outer edge of the material distribution plate 7 is evenly divided along the circumference with a plurality of limit grooves 7.1 for inserting the workpiece 100. The material distribution plate 7 realizes equal-angle drive switching through the divider 6, ensuring that the workpiece 100 is accurately moved to the welding mechanism position each time, thereby improving the automatic welding accuracy. In this embodiment, the outer edge of the material distribution plate 7 is evenly provided with twelve limit grooves 7.1 along the circumference. Specifically, as Figure 8 As shown, magnets 24 are provided near each limiting groove 7.1 on the distribution plate 7, so that the workpiece 100 is more firmly engaged in the limiting groove 7.1 and will not be thrown out during the rotation of the distribution plate 7, which is safer.

[0043] The upper welding head tooling includes a fixed base 8, and the upper welding head 3 is arranged on the fixed base 8; the lower welding head tooling includes a mounting plate 9 slidably arranged on the top plate 2, and a mounting block 10 that can slide vertically is arranged on the mounting plate 9, and the lower welding head 4 is vertically arranged on the mounting block 10, and the upper end of the lower welding head 4 is provided with a plug-in slot 4.1 for inserting the welding piece 101. In this structure, the upper welding head 3 and the lower welding head 4 are both connected to the positive and negative poles of the corresponding welding transformer 25, and the welding control box 26 is used to control the output of the welding current and the setting of the welding parameters.

[0044] like Figure 5 , 6 As shown, the driving mechanism includes a first driving cylinder 11 for driving the mounting plate 9 to move toward the position of the upper welding head 3 and a second driving cylinder 12 for controlling the mounting plate 9 to drive the lower welding head 4 to move up and down. Specifically, the first driving cylinder 11 is fixed on the top plate 2 in the horizontal direction, and the piston rod of the first driving cylinder 11 is connected to the end of the mounting plate 9 away from the upper welding head 3. In this structure, the mounting plate 9 and the top plate 2 are slidably connected through a linear slide structure.

[0045] In addition, the second drive cylinder 12 is vertically arranged below the mounting plate 9, and an avoidance hole 2.1 is provided on the top plate 2. The lower end of the second drive cylinder 12 is slidably penetrated in the avoidance hole 2.1, and the piston rod of the second drive cylinder 12 passes upward through the mounting plate 9 and is connected to the mounting block 10, that is, when the first drive cylinder 11 pushes the mounting plate 9 to move toward the position of the upper welding head 3, the second drive cylinder 12 moves synchronously with it, and the lower end of the second drive cylinder 12 slides in the avoidance hole 2.1. When the mounting plate 9 moves to the preset welding position, the second drive cylinder 12 extends upward and drives the lower welding head 4 to drive the welding part 101 to move into the welding hole of the workpiece 100.

[0046] More specifically, Figure 4 , 9As shown in FIG. 10 , the welding part feeding mechanism in the structure includes a vibration plate 13 and a mounting seat 14, on which a feeding mold 15 and a feeding driving cylinder 16 for driving the feeding mold 15 to slide horizontally are slidably provided, and a card slot 15.1 is provided on the feeding mold 15. When the welding part 101 in the vibration plate 13 is transported to the card slot 15.1 through the material guide slot, the feeding driving cylinder 16 drives the feeding mold 15 to move toward the lower welding head 4 until the welding part 101 is located directly above the lower welding head 4, and then, the second driving cylinder 12 drives the lower welding head 4 to move upward, so that the lower end of the welding part 101 is inserted into the insertion slot 4.1 of the lower welding head 4. In this structure, in order to increase the limiting stability of the welding piece 101 and the slot 15.1, a mounting hole is provided on the feeding die 15 near the slot 15.1, and a magnet 24 is inserted in the mounting hole, that is, when the welding piece 101 enters the slot 15.1 from the guide slot, a more stable limiting can be achieved under the adsorption effect of the magnet 24. In addition, in this structure, the feeding die 15 and the mounting seat 14 are connected by a linear slide rail 31.

[0047] In addition, in this structure, since there is a limiting convex edge 101.1 at the upper end of the welding piece 101, when it is stuck in the slot 15.1, the limiting convex edge 101.1 is supported on the upper end surface of the slot 15.1 and is affected by the suction force of the magnet 24. In this device structure, due to space limitations, when the lower welding head 4 drives the welding piece 101 to continue to move toward the upper welding head 3, it is necessary to first prompt the mounting plate 9 to drive the lower welding head 4 to move downward for a distance before continuing to move horizontally. Therefore, in this structure, in order to allow the welding piece 101 to move to the position of the upper welding head 3 at the same time as the lower welding head 4, it is necessary to first In order to realize the demoulding of the weldment 101 from the feeding mold 15, the first driving cylinder 11 in the structure is also connected to a mid-position pressure-maintaining valve 17, so that the first driving cylinder 11 can stop halfway when it runs a preset distance but does not reach the limit displacement, so that the weldment 101 is separated from the slot 15.1 and hovers at the set position; then the second driving cylinder 12 continues to drive the mounting block 10 downward, driving the lower welding head 4 and the weldment 101 to move downward, and when there is no horizontal position interference, the first driving cylinder 11 drives the mounting plate 9 to move horizontally, prompting the lower welding head 4 to move with the weldment 101 to be directly below the workpiece 100.

[0048] As shown in 3, 4, and 7, the mounting frame 5 is also provided with a discharge lever 18 and a hopper 19. The discharge lever 18 is tiltedly arranged near the outer edge of the distribution plate 7 and located in front of the rotation direction of the welding mechanism. The hopper 19 is arranged below the discharge lever 18. As the distribution plate 7 rotates, the welded workpiece 100 is gradually separated from the limiting groove 7.1 under the limiting guiding action of the discharge lever 18 until it falls into the hopper 19, thereby realizing the automatic collection of the welded workpiece 100.

[0049] The frame 1 is also provided with a limiting mechanism. When the material distribution plate 7 rotates to the point where the workpiece 100 is located directly below the upper welding head 3, i.e., the welding station, the limiting mechanism is pressed and limited on the outer wall of the workpiece 100 to keep it fixed and immovable, thereby improving the welding accuracy of the workpiece 100. More specifically, the limiting mechanism includes a positioning rod 20 and a positioning drive cylinder 21 that drives the positioning rod 20 to move horizontally. The positioning drive cylinder 21 is installed on the top plate 2 through a corresponding fixed bracket 32. The piston rod of the positioning drive cylinder 21 is connected to one end of the positioning rod 20, and the other end of the positioning rod 20 is pressed on the outer wall of the workpiece 100. In addition, a guide seat 22 is provided at the outer edge of the material distribution plate 7, and a guide hole 22.1 is provided on the guide seat 22. One end of the positioning rod 20 away from the positioning drive cylinder 21 slides through the guide hole 22.1 to ensure the stability of sliding and prevent deviation.

[0050] On the other hand, a buffer limit mechanism is also provided on the top plate 2 to provide resistance and buffering for the horizontal movement of the mounting plate 9; and the extension length of the resistance block 23 on the buffer limit mechanism is adjustable, which further adjusts the concentricity of the lower welding head 4 and the upper welding head 3, thereby improving the coaxiality of the weldment 101 and the workpiece 100 after welding, ensuring the welding quality of the product, reducing the scrap rate and improving the qualified rate.

[0051] The welding process of the device is as follows:

[0052] 1. First, fill the vibration plate 13 with welded parts 101, and fill the limiting groove 7.1 of the distribution plate 7 with workpieces 100;

[0053] 2. The weldment 101 is transported into the slot 15.1 of the feeding die 15 through the vibration plate and is adsorbed on the magnet close to the slot 15.1. Then, the feeding drive cylinder 16 pushes the feeding die 15 toward the lower welding head 4 until the weldment 101 moves to the top of the lower welding head 4.

[0054] 3. The second driving cylinder 12 moves outward, causing the lower welding head 4 to move upward, and the lower end of the welding piece 101 is inserted into the insertion groove 4.1 of the lower welding head 4;

[0055] 4. The middle pressure-maintaining valve 17 works for the first time, controlling the first driving cylinder 11 to move forward a short distance and then to hover, completing the demoulding action of the weldment 101 and the feeding mold 15. After losing the support and limit of the feeding mold 5, the weldment 101 continues to move down into the insertion groove 4.1 under the action of its own weight until the limit convex edge 101.1 on the weldment 101 is limited against the upper end surface of the lower welding head 4 (such as Figure 6 shown);

[0056] 5. The second drive cylinder 12 moves downward a certain distance;

[0057] 6. The middle pressure-maintaining valve 17 works for the second time, controlling the first driving cylinder 11 to drive the mounting plate 6 to move toward the upper welding head 3, until the welded part 101 moves to the bottom of the upper welding head 3 and reaches the welding station;

[0058] 7. The second driving cylinder 12 is pushed out again. When the upper end of the welding piece 101 penetrates into the welding hole of the workpiece 100 and contacts the bottom thereof, a welding arc is generated under the discharge action of the transformer, so that the upper end of the welding piece 101 is welded and fixed to the bottom of the welding hole of the workpiece 100.

[0059] 8. After welding is completed, the second drive cylinder 12 moves downward to reset;

[0060] 9. The remaining driving cylinders are also reset at the same time, and the material distribution plate 7 rotates to prepare for the next welding. During the rotation of the material distribution plate 7, the unloading lever 18 takes advantage of the situation to disengage the welded workpiece 100 from the position of the limiting groove 7.1 of the material distribution plate 7 and drops it into the hopper 19, thereby realizing the automatic collection of the workpiece 100. As the material distribution plate 7 rotates, each time a workpiece 100 falls, a workpiece 100 to be welded is manually inserted into the limiting groove 7.1, thereby ensuring the continuous welding of the workpiece 100. The entire welding process only requires one operator to place the workpiece 100, saving labor.

[0061] In the embodiment of the present invention, in order to be more environmentally friendly and improve control accuracy, the above-mentioned driving cylinders are all cylinder structures, and in order to adjust the air pressure and stabilize the air circuit pressure, an air storage tank 27 and an air source processor 28 pneumatically connected to each driving cylinder are provided on the top plate 2 of the frame 1. In order to better realize automated and precise control, each driving cylinder is correspondingly connected to a solenoid valve, and each solenoid valve is connected to the controller signal.

[0062] The above is an explanation of the preferred embodiments of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic welding device, comprising a frame (1), characterized in that: The top plate (2) of the frame (1) is provided with: The welding mechanism comprises an upper welding head fixture and a lower welding head fixture, wherein the upper welding head fixture is provided with an upper welding head (3), and the lower welding head fixture is provided with a lower welding head (4), and the upper welding head (3) and the lower welding head (4) are respectively connected to the positive and negative poles of a welding transformer (25); A workpiece feeding mechanism is used to transport the workpieces (100) to be welded one by one to the position directly below the upper welding head (3); the workpiece feeding mechanism comprises a mounting frame (5), a divider (6) is provided on the mounting frame (5), a material distribution plate (7) is provided on the output shaft of the divider (6), the outer edge of the material distribution plate (7) is evenly divided along the circumference and provided with a plurality of limit grooves (7.1) for inserting the workpieces (100), and a magnet (24) is provided on the material distribution plate (7) at a position close to each of the limit grooves (7.1); A welding piece feeding mechanism is used to convey welding pieces (101) one by one to a position above a lower welding head (4); the welding piece feeding mechanism comprises a vibration plate (13) and a mounting seat (14); a feeding die (15) and a feeding drive cylinder (16) for driving the feeding die (15) to slide horizontally are slidably provided on the mounting seat (14); a card slot (15.1) is provided on the feeding die (15); when the welding piece (101) in the vibration plate (13) is conveyed into the card slot (15.1), the feeding drive cylinder (16) drives the feeding die (15) to move toward the lower welding head (4) until the welding piece (101) is located directly above the lower welding head (4); A driving mechanism is used to drive the lower welding head tooling to move toward the upper welding head (3) until the welding piece (101) and the workpiece (100) are in contact and connected to generate a welding arc to achieve welding fixation; The controller is electrically connected to the welding mechanism, the workpiece feeding mechanism, the welding piece feeding mechanism and the driving mechanism to realize automatic control of the welding process.

2. The automatic welding device according to claim 1, characterized in that: The upper welding head fixture comprises a fixed base (8), and the upper welding head (3) is arranged on the fixed base (8); the lower welding head fixture comprises a mounting plate (9) slidably arranged on the top plate (2), and a mounting block (10) that can slide vertically is provided on the mounting plate (9), and the lower welding head (4) is vertically arranged on the mounting block (10), and the upper end of the lower welding head (4) is provided with a plug-in slot (4.1) for inserting a welding piece (101).

3. The automatic welding device according to claim 2, characterized in that: The driving mechanism comprises a first driving cylinder (11) and a second driving cylinder (12), wherein the first driving cylinder (11) is horizontally fixed on the top plate (2), and the piston rod of the first driving cylinder (11) is connected to the end of the mounting plate (9); the second driving cylinder (12) is vertically arranged below the mounting plate (9), and an avoidance through hole (2.1) is provided on the top plate (2), and the lower end of the second driving cylinder (12) is slidably inserted into the avoidance through hole (2.1), and the piston rod of the second driving cylinder (12) passes upward through the mounting plate (9) and is connected to the mounting block (10).

4. The automatic welding device according to claim 2 or 3, characterized in that: The lower welding head tooling further comprises a mid-position pressure-maintaining valve (17), and the mid-position pressure-maintaining valve (17) is connected to the first driving cylinder (11).

5. The automatic welding device according to claim 1, characterized in that: The mounting frame (5) is also provided with a discharge lever (18) and a hopper (19). The discharge lever (18) is tiltedly arranged near the outer edge of the material distribution plate (7) and located in front of the rotation direction of the welding mechanism. The hopper (19) is arranged below the discharge lever (18). As the material distribution plate (7) rotates, the welded workpiece (100) is gradually separated from the limiting groove (7.1) under the limiting guiding action of the discharge lever (18) until it falls into the hopper (19).

6. The automatic welding device according to claim 5, characterized in that: The frame (1) is also provided with a limiting mechanism. When the material distribution plate (7) rotates until the workpiece (100) is located directly below the upper welding head (3), the limiting mechanism is pressed and limited on the outer wall of the workpiece (100) to keep it fixed.

7. The automatic welding device according to claim 6, characterized in that: The limiting mechanism comprises a positioning pressure rod (20) and a positioning drive cylinder (21) for driving the positioning pressure rod (20) to move horizontally; a guide seat (22) is provided on the material distribution plate (7), a guide hole (22.1) is provided on the guide seat (22), and one end of the positioning pressure rod (20) away from the positioning drive cylinder (21) is slidably penetrated into the guide hole (22.1).

8. The automatic welding device according to claim 6, characterized in that: The top plate (2) is also provided with a buffering and limiting mechanism for providing a buffer to the horizontal movement of the mounting plate (9); and the extension length of the conflicting stopper (23) on the buffering and limiting mechanism is adjustable.

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