Automatic welding machine for metal support

Abstract

The utility model relates to a metal support automatic welding machine which comprises a rack, a jacking mechanism and a rotating disc capable of rotating intermittently are installed on the rack, a plurality of evenly-distributed positioning molds are movably connected to the circumference of the rotating disc and extend towards the outer side of the rotating disc, and metal support spare parts to be welded are positioned in the positioning molds. The rack is further provided with an upper die located above the jacking mechanism, the left side and the right side of the upper die are each connected with a first welding mechanism, the two first welding mechanisms are symmetrically arranged, the upper side and the lower side of the upper die are each connected with a second welding mechanism, and the two second welding mechanisms are symmetrically arranged. When the rotating disc is rotated to drive one of the positioning molds to rotate to the position above the jacking mechanism, the jacking mechanism jacks up the positioning mold to enable the positioning mold to be combined with the upper mold, and therefore the positioning mold is pressed and fixed. According to the scheme, all the mechanisms are integrated to cooperate together, and automatic welding of the metal support spare parts is achieved.

Description

Technical Field

[0001] The utility model relates to the field of non-standard automated mechanical equipment, in particular to an automatic welding machine for metal brackets. Background Art

[0002] In the field of kitchenware accessories, metal brackets, as an important structural component, are usually used to support food or trays and are widely used in various kitchenware products, such as ovens, barbecue grills, microwave ovens and other kitchen appliances or utensils.

[0003] Currently, most factories still use manual welding to manufacture metal brackets. This welding method not only requires high operator skill but is also easily affected by the operator's condition, resulting in unstable welding quality and high defective product rates. Manual welding requires a high level of individual skill from the operator, and welding results vary significantly between operators, resulting in poor product consistency and high defective product rates. Furthermore, manual welding is slow, especially in batch production, limiting production efficiency and making it difficult to meet the needs of large-scale production. Furthermore, manual welding requires a large number of operators, increasing operating costs for enterprises.

[0004] Although some companies have attempted to improve production by introducing semi-automated welding equipment, specifically handheld laser welding machines, the inherent design limitations of these devices prevent them from completely eliminating reliance on manual labor. These "semi-automated" systems are still based on manual operation. While these systems utilize advanced welding mechanisms, manual operation is still required. This involves adjusting welding positions and controlling welding parameters, making the welding process still reliant on the operator's experience and skills. While production efficiency has improved, it's still far from ideal, especially in large-scale production, where the limitations of semi-automatic equipment become more pronounced.

[0005] The market has an urgent need for automated welding solutions that can improve production efficiency, reduce defect rates and reduce labor costs.

[0006] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Utility Model Content

[0007] The utility model overcomes the deficiencies of the above-mentioned technology and provides an automatic welding machine for a metal bracket.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A metal bracket automatic welding machine includes a frame, a jacking mechanism and an intermittently rotatable turntable are installed on the frame, and a number of evenly distributed positioning molds are movably connected on the circumference of the turntable, the positioning molds extend toward the outside of the turntable, and the metal bracket parts to be welded are positioned in the positioning molds. The frame is also provided with an upper mold located above the jacking mechanism, and the left and right sides of the upper mold are respectively connected to a first welding mechanism, and the two first welding mechanisms are symmetrically arranged, and the upper and lower sides of the upper mold are respectively connected to a second welding mechanism, and the two second welding mechanisms are symmetrically arranged; when the rotating turntable drives one of the positioning molds to rotate above the jacking mechanism, the jacking mechanism lifts the positioning mold so that it is molded together with the upper mold, thereby pressing and fixing the positioning mold.

[0010] Furthermore, a first connecting plate for connecting the positioning mold is fixedly connected to the circumference of the turntable, and a number of the first connecting plates are arranged corresponding to the positioning molds. The first connecting plate extends toward the outside of the turntable, and a guide rod is connected to the lower end of the positioning mold. The positioning mold is movably connected to the first connecting plate through the guide rod, and the positioning mold can slide along the guide rod to rise / fall relative to the first connecting plate.

[0011] Furthermore, the first welding mechanism includes a first telescopic cylinder fixed on the frame, the upper end of the first telescopic cylinder is connected to a first fixed seat, the first telescopic cylinder includes a second piston rod, the other end of the second piston rod is connected to a first connecting seat that can follow the second piston rod to extend and retract, the first connecting seat is arranged toward the upper mold, the first connecting seat is connected to a first welding gun head and a first positioning pin, four first welding gun heads are arranged side by side, two first positioning pins are provided that are symmetrical to each other, and the head of the first welding gun head and the first positioning pin are arranged toward the upper mold.

[0012] Furthermore, the left and right side walls of the positioning mold are respectively provided with four first avoidance grooves for avoiding the first welding gun head, and the first avoidance grooves on the left and right side walls are respectively symmetrically arranged one by one. The left and right side walls of the positioning mold are also respectively provided with two first positioning holes for inserting the first positioning pin, and the first positioning holes on the left and right side walls are respectively symmetrically arranged one by one.

[0013] Furthermore, the second welding mechanism includes a second telescopic cylinder fixed to the frame, the upper end of the second telescopic cylinder is connected to a second fixed seat, the second telescopic cylinder includes a third piston rod, the other end of the third piston rod is connected to a second connecting seat that can follow the third piston rod to extend and retract, the second connecting seat is arranged toward the upper mold, the second connecting seat is connected to a second welding gun head and second positioning pins symmetrically arranged on both sides of the second welding gun head, and the head of the second welding gun head and the second positioning pins are arranged toward the upper mold.

[0014] Furthermore, the upper and lower side walls of the positioning mold are each provided with a second avoidance groove for avoiding the first welding gun head, and the second avoidance grooves on the upper and lower side walls are symmetrically arranged. The upper and lower side walls of the positioning mold are also each provided with two second positioning holes for inserting the second positioning pin, and the first positioning holes on the upper and lower side walls are symmetrically arranged one by one.

[0015] Furthermore, the jacking mechanism includes a fixed bracket fixedly connected to the frame and a jacking cylinder connected to the lower end of the fixed bracket, the fixed bracket includes a second connecting plate, a third connecting plate located above the second connecting plate, and a connecting rod that fixes the second connecting plate to the third connecting plate, the jacking cylinder includes a first piston rod that passes through the second connecting plate upward, the other end of the first piston rod is fixedly connected to a fourth connecting plate, and the fourth connecting plate is provided with a push rod that passes through the third connecting plate upward, the jacking cylinder drives the first piston rod to extend and retract, thereby driving the fourth connecting plate to move up and down between the second connecting plate and the third connecting plate, and the fourth connecting plate drives the push rod to move up and down in the third connecting plate.

[0016] Furthermore, the lower end of the turntable is fixedly connected to the frame via a third fixing seat, and the third fixing seat is connected to a motor for driving the turntable to rotate.

[0017] Furthermore, the positioning mold is provided with a plurality of positioning grooves for accommodating and positioning the metal bracket parts.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This application provides an automatic welding machine for metal brackets. Its main components include a frame, a lifting mechanism mounted on the frame, an intermittently rotating turntable, a positioning mold, an upper mold, a first welding mechanism, and a second welding mechanism. These components work together to achieve automatic welding of metal bracket components. By integrating multiple welding mechanisms and an automated material flow system, this automatic welding machine significantly reduces the time and frequency of manual intervention. Specifically, the turntable can simultaneously support multiple positioning molds, and the intermittent rotation of the turntable enables switching between welding stations. The positioning molds are used to secure the metal bracket components to be welded, ensuring their stability during the welding process. When the turntable rotates one of the positioning molds to the welding station, the lifting mechanism rises and lifts the positioning mold, bringing it into close contact with the upper mold, securing the positioning mold and ensuring accurate positioning during welding. The first and second welding mechanisms are symmetrically positioned on the left and right sides and the top and bottom sides of the upper mold, respectively. This symmetrical arrangement enables simultaneous and comprehensive welding of the metal bracket components, improving welding efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the overall structure of the metal bracket automatic welding machine in this case.

[0021] Figure 2 This is a top view of the overall structure of the metal bracket automatic welding machine in this case.

[0022] Figure 3 It is a structural schematic diagram of the connection state of the positioning mold and the first connecting plate in this case.

[0023] Figure 4 It is a structural diagram of the positioning mold in this case.

[0024] Figure 5 It is a structural diagram of the first welding mechanism in this case.

[0025] Figure 6 It is a structural diagram of the second welding mechanism in this case.

[0026] Figure 7 This is a diagram of the combined state of the first welding mechanism, the second welding mechanism, the positioning mold and the upper mold during welding work.

[0027] Figure 8 This case Figure 7 A diagram of the first welding mechanism, the second welding mechanism, the positioning mold and the upper mold in the separated state after the welding work is completed.

[0028] Figure 9 It is a structural diagram of the jacking mechanism in this case.

[0029] Figure 10 It is a structural diagram of the turntable connection positioning mold in this case. DETAILED DESCRIPTION

[0030] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0031] For ease of description and understanding, please refer to the descriptions of the front, back, up, down, left, right, outside, inside and other positional relationships in this case. Figure 2 、 Figure 4 The orientation shown in .

[0032] like Figures 1 to 10As shown, this invention discloses an automatic metal bracket welding machine, comprising a frame 100 that supports all other components and ensures the overall stability of the equipment. Mounted on the frame 100 is a lifting mechanism 1 and an intermittently rotating turntable 2. The intermittent rotation of the turntable 2 enables automatic switching of welding stations, improving production efficiency. The precise movement of the lifting mechanism 1 ensures consistent positioning of the metal bracket components 200 during each welding operation, enhancing welding accuracy. Several evenly distributed positioning molds 3 are movably connected around the circumference of the turntable 2. The positioning molds 3 are used to secure the metal bracket components 200 to be welded, ensuring their stability during the welding process. The positioning molds 3 extend outward from the turntable 2 to ensure convenient welding operations. The metal bracket components 200 to be welded are positioned within the positioning molds 3. During implementation, the metal bracket components 200 are manually positioned within the positioning molds 3. The frame 100 also includes an upper mold 4 located above the lifting mechanism 1. When the turntable 2 rotates the positioning mold 3 to the welding station, the lifting mechanism 1 lifts upward and lifts it from the turntable 2, causing the positioning mold 3 to rise upward and gradually move away from the turntable 2. As the positioning mold 3 gradually rises and approaches the upper mold 4, until the upper mold 4 is pressed into the positioning mold 3, the positioning mold 3 is pressed and fixed in cooperation with the lifting mechanism 1. The upper mold 4 cooperates with the lifting mechanism 1 to press the positioning mold 3, thereby ensuring the positioning accuracy and stability during the welding process and improving the welding quality. A first welding mechanism 5 is respectively connected to the left and right sides of the upper mold 4, and the two first welding mechanisms 5 are symmetrically arranged. A second welding mechanism 6 is respectively connected to the upper and lower sides of the upper mold 4, and the two second welding mechanisms 6 are symmetrically arranged. The first welding mechanism 5 and the second welding mechanism 6 are symmetrically arranged around the upper mold 4 to achieve simultaneous all-round welding of the metal bracket parts 200, greatly improving the welding efficiency and welding quality.

[0033] It should be noted that, in practice, this invention employs multiple sensor switches to detect the presence or absence of an object and its placement, thereby triggering the device's actions or changing its state. This is well known in the art, and a detailed description of each sensor switch is omitted here. In practice, those skilled in the art may, based on common knowledge in the art and in conjunction with the present invention's automatic metal tube threading machine, configure the sensor switches to achieve linkage between the various mechanisms.

[0034] Furthermore, if Figures 1-4 、 Figure 10As shown, a first connecting plate 21 for connecting the positioning mold 3 is fixedly connected to the circumference of the turntable 2, and a plurality of first connecting plates 21 are provided corresponding to the positioning molds 3, and the first connecting plates 21 are extended toward the outside of the turntable 2. In specific implementation, the first connecting plate 31 is fixed to the turntable 2 by means of bolt connection or the like, which facilitates the connection of the positioning mold 3 and enables the positioning mold 3 to move relative to the turntable 2 to cooperate with the action of the lifting mechanism 1. When the lifting mechanism 1 is working, the design of the first connecting plate 21 enables the positioning mold 3 to smoothly detach from the plane of the turntable 2 so that the lifting mechanism 1 can lift it up and close the mold with the upper mold 4. Among them, the first connecting plate 21 is extended toward the outside of the turntable 2 to ensure that the positioning mold 3 has enough space to slide during operation. A guide rod 31 is connected to the lower end of the positioning mold 3, and the positioning mold 3 is movably connected to the first connecting plate 21 through the guide rod 31. The positioning mold 3 can slide along the guide rod 31 to rise / fall relative to the first connecting plate 21. The guide rod 31 plays a guiding role, which is used to guide the positioning mold 3 to rise or fall in the vertical direction, ensuring its smooth movement under the action of the lifting mechanism 1. The guiding role of the guide rod 31 ensures the stability and accuracy of the positioning mold 3 during the rising and falling process.

[0035] Specifically, if Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 、 Figure 8As shown, the first welding mechanism 5 includes a first telescopic cylinder 51 fixed to the frame 100. Precise control of the first telescopic cylinder 51 ensures that the first welding gun tip 54 accurately contacts the welding area. A first fixing base 52 is connected to the upper end of the first telescopic cylinder 51, securing the first telescopic cylinder 51 to the frame 100 to ensure stability during welding. The first telescopic cylinder 51 includes a second piston rod 511, the other end of which is connected to a first connecting base 53 that can extend and retract with the second piston rod 511. The first connecting base 53 is positioned toward the upper mold 4 and is connected to the first welding gun tip 54 and a first locating pin 55. The first locating pin 55 not only serves to position and secure the positioning module 3, further stabilizing it, but also effectively ensures the accurate positioning of the first welding gun tip 54 during welding, preventing it from deviating from its target position. In practice, two symmetrical first locating pins 55 are provided to achieve optimal positioning. In order to improve welding efficiency, four first welding gun heads 54 are arranged side by side. The design of four first welding gun heads 54 improves welding efficiency and ensures uniformity of welding points and consistency of welding quality. It should be noted that in this embodiment, the number of first welding gun heads 54 set is four, in order to match the positioning mold 3 corresponding to this case and the metal bracket parts 200 that need to be welded. In the actual production process, the user can also set a corresponding positioning mold 3 according to specific needs and the size and structure of the required metal bracket parts 200, and appropriately increase or decrease the number of first welding gun heads 54 to meet actual production needs. The head of the first welding gun head 54 and the first positioning pin 55 are arranged toward the upper mold 4 to facilitate the precise welding of the metal bracket parts 200 in the positioning module 3 lifted by the lifting mechanism 1.

[0036] Furthermore, if Figure 3-Figure 5 As shown, in order to cooperate with the structure and use of the above-mentioned first welding mechanism 5 in this case, the accuracy and efficiency of the welding operation are ensured. Four first avoidance grooves 32 for avoiding the first welding gun head 54 are respectively provided on the left and right side walls of the positioning mold 3, and the first avoidance grooves 32 on the left and right side walls are respectively symmetrically arranged one by one. The first avoidance grooves 32 are used to avoid the first welding gun head 54, ensuring that the welding gun head can approach the welding point of the metal bracket parts 200 without obstacles. Two first positioning holes 33 for inserting the first positioning pin 55 are also respectively provided on the left and right side walls of the positioning mold 3, and the first positioning holes 33 on the left and right side walls are respectively symmetrically arranged one by one. The first positioning hole 33 is used for inserting the first positioning pin 55 to ensure that the position of the welding head is accurate during welding. This symmetrically arranged structure is convenient for positioning and easy to use.

[0037] Specifically, as shown in the figure, Figure 1 、 Figure 2 、 Figure 6-Figure 8 As shown, the second welding mechanism 6 includes a second telescopic cylinder 61 fixed to the frame 100, the upper end of the second telescopic cylinder 61 is connected to a second fixed seat 62, the second telescopic cylinder 61 includes a third piston rod 611, the other end of the third piston rod 611 is connected to a second connecting seat 63 that can follow the third piston rod 611 to extend and retract, the second connecting seat 63 is arranged toward the upper mold 4, and the second connecting seat 63 is connected to a second welding gun head 64 and second positioning pins 65 symmetrically arranged on both sides of the second welding gun head 64, and the head of the second welding gun head 64 and the second positioning pin 65 are arranged toward the upper mold 4. The structure of the second welding mechanism 6 in this case is similar to that of the first welding mechanism 5, and its working principle, purpose and effect are similar. Therefore, for the corresponding description of the second welding mechanism 6, reference can be made to the above description of the first welding mechanism 5, and no further details are given here. It should be noted that the purpose of setting the second welding mechanism 6 is, on the one hand, to further improve the welding efficiency and realize the simultaneous welding of four welding mechanisms. On the other hand, it is to cooperate with the positioning mold 3 corresponding to this case and the metal bracket parts 200 that need to be welded. During the actual production process, the user can also adaptively adjust the location, quantity, and structure of the second welding mechanism 6 according to specific needs and the size and structure of the metal bracket parts 200 to be welded to meet actual production needs.

[0038] Furthermore, if Figure 3 、 Figure 4 、 Figure 6 As shown, in order to cooperate with the structure and use of the above-mentioned second welding mechanism 6 in this case, the accuracy and efficiency of the welding operation are ensured. A second avoidance groove 34 for avoiding the first welding gun head 54 is provided on the upper and lower side walls of the positioning mold 3, and the second avoidance grooves 34 on the upper and lower side walls are symmetrically arranged. Two second positioning holes 35 for inserting the second positioning pin 65 are also provided on the upper and lower side walls of the positioning mold 3, and the first positioning holes 33 on the upper and lower side walls are symmetrically arranged one by one. The structure, purpose and effect of the second avoidance groove 34 on the positioning mold 3 are similar to those of the above-mentioned first avoidance groove 32; the structure, purpose and effect of the second positioning hole 35 on the positioning mold 3 are similar to those of the above-mentioned first positioning hole 33. Therefore, for the description of the second avoidance groove 34 and the second positioning hole 35, please refer to the corresponding description above and no further details will be given here.

[0039] like Figure 1 、 Figure 2 、 Figure 9As shown, the lifting mechanism 1 of this case includes a fixed bracket 11 fixedly connected to the frame 100 and a lifting cylinder 12 connected to the lower end of the fixed bracket 11, the fixed bracket 11 includes a second connecting plate 111, a third connecting plate 112 located above the second connecting plate 111, and a connecting rod 113 that connects and fixes the second connecting plate 111 and the third connecting plate 112. The stable fixed bracket 11 ensures the stability of the lifting mechanism 1 during operation, reducing vibration and displacement. The lifting cylinder 12 includes a first piston rod 121 that passes through the second connecting plate 111 upward, and the other end of the first piston rod 121 is fixedly connected to a fourth connecting plate 122. The fourth connecting plate 122 is provided with a push rod 123 that passes through the third connecting plate 112 upward. In specific implementation, in order to more stably lift the positioning mold 3, the fourth connecting plate 122 is set to a rectangle, and four push rods 123 are set along the four sides of the fourth connecting plate 122. During implementation, the lifting cylinder 12 drives the first piston rod 121 to extend and retract, thereby driving the fourth connecting plate 122 to move up and down between the second connecting plate 111 and the third connecting plate 112. The fourth connecting plate 122 drives the jacking rod 123 to move up and down within the third connecting plate 112. To ensure a stable connection, the second connecting plate 111 and the third connecting plate 112 are configured as a rectangle, with four connecting rods 113 provided along the periphery of the connecting plate 111 to enhance the stability of the overall structure of the lifting mechanism 1.

[0040] like Figure 1 、 Figure 2 、 Figure 10 As shown, the lower end of the turntable 2 is fixedly connected to the frame 100 via a third fixing seat 22 , and the third fixing seat 22 is connected to a motor 23 for driving the turntable 2 to rotate.

[0041] like Figure 3 、 Figure 4 As shown, the positioning mold 3 further comprises a plurality of positioning slots 36 for accommodating and positioning the metal bracket components 200. In practice, the positioning slots 36 are provided with various configurations based on the different component structures of the metal bracket components 200. Users can also configure a different number and configuration of positioning slots 36 based on actual needs and the desired metal bracket component 200 structure. The positioning slots 36 securely position and stabilize the metal bracket components 200 on the positioning mold 3, improving positioning accuracy during welding and reducing weld defects caused by positional deviation.

[0042] The following is a description of the working principle of this case in combination with the full text:

[0043] In the initial state, the turntable 2 is stationary, and the operator manually places the metal bracket parts 200 into the positioning grooves 36 of the positioning mold 3. According to the time of manually placing the metal bracket parts 200, the intermittent rotation time of the turntable 2 is set to meet the synchronous loading and synchronous welding, further improving the welding efficiency.

[0044] After the metal bracket parts 200 are placed, the motor 23 is started to drive the turntable 2 to rotate intermittently according to a predetermined angle. After each rotation, a new positioning mold 3 will move to the welding station above the lifting mechanism 1.

[0045] Then, the lifting mechanism 1 activates, activating the lifting cylinder 12 and extending the first piston rod 121. This in turn pushes the fourth connecting plate 122 upward, pushing the ejector rod 123 upward. This ejector rod 123 lifts the positioning mold 3, freeing it from the plane of the turntable 2. As the positioning mold 3 gradually rises, it approaches the upper mold 4 until the upper mold 4 presses into the positioning mold 3, thereby cooperating with the lifting mechanism 1 to compress and secure the positioning mold 3.

[0046] At this point, the first welding mechanism 5 and the second welding mechanism 6 are activated synchronously. The first and second telescopic cylinders 51 and 61 respectively drive the first and second connecting seats 53 and 63 to extend toward the positioning mold 3. The first and second welding gun tips 54 and 64 are inserted into the corresponding first and second positioning holes 33 and 35 of the positioning mold through the first and second positioning pins 55 and 65, respectively, for precise positioning. The first and second welding gun tips 54 and 64 extend into the corresponding first and second avoidance grooves 32 and 34, respectively, and align with the welding points of the metal bracket component 200 to perform the welding operation.

[0047] After welding is complete, the first and second telescopic cylinders 51 and 61 retract to their initial positions. The lifting cylinder 12 retracts the first piston rod 121, lowering the ejector rod 123 to its initial position, and the positioning mold 3 returns to the plane of the turntable 2. The turntable 2 rotates again until the next positioning mold 3 is positioned below the lifting mechanism 1. This process is repeated repeatedly. When the positioning mold 3 containing the welded metal bracket rotates toward the operator, the operator can remove the welded metal bracket.

[0048] As mentioned above, this case protects an automatic welding machine for metal brackets, and all technical solutions that are identical or similar to those in this case should be deemed to fall within the scope of protection of this case.

Claims

1. A metal bracket automatic welding machine, characterized by: The invention comprises a frame (100), wherein a lifting mechanism (1) and an intermittently rotatable turntable (2) are installed on the frame (100), and a plurality of evenly distributed positioning molds (3) are movably connected on the circumference of the turntable (2), wherein the positioning molds (3) are extended toward the outside of the turntable (2), and metal bracket parts (200) to be welded are positioned in the positioning molds (3), and an upper mold (4) located above the lifting mechanism (1) is also provided on the frame (100), wherein the left and right sides of the upper mold (4) are respectively connected to a first welding mechanism (5), and the two first welding mechanisms (5) are symmetrically arranged, and the upper and lower sides of the upper mold (4) are respectively connected to a second welding mechanism (6), and the two second welding mechanisms (6) are symmetrically arranged; when the rotating turntable (2) drives one of the positioning molds (3) to rotate to the top of the lifting mechanism (1), the lifting mechanism (1) lifts the positioning mold (3) so that it is molded with the upper mold (4), thereby pressing and fixing the positioning mold (3).

2. The metal bracket automatic welding machine according to claim 1, characterized in that: A first connecting plate (21) for connecting the positioning mold (3) is fixedly connected to the circumference of the turntable (2), and a plurality of the first connecting plates (21) are provided corresponding to the positioning molds (3). The first connecting plates (21) are extended toward the outside of the turntable (2). A guide rod (31) is connected to the lower end of the positioning mold (3). The positioning mold (3) is movably connected to the first connecting plate (21) through the guide rod (31). The positioning mold (3) can slide along the guide rod (31) to rise / fall relative to the first connecting plate (21).

3. The metal bracket automatic welding machine according to claim 1, characterized in that: The first welding mechanism (5) comprises a first telescopic cylinder (51) fixed on a frame (100), the upper end of the first telescopic cylinder (51) is connected to a first fixed seat (52), the first telescopic cylinder (51) comprises a second piston rod (511), the other end of the second piston rod (511) is connected to a first connecting seat (53) that can follow the second piston rod (511) to extend and retract, the first connecting seat (53) is arranged toward the upper mold (4), the first connecting seat (53) is connected to a first welding gun head (54) and a first positioning pin (55), four first welding gun heads (54) are arranged side by side, two first positioning pins (55) are arranged symmetrically to each other, and the head of the first welding gun head (54) and the first positioning pin (55) are arranged toward the upper mold (4).

4. The metal bracket automatic welding machine according to claim 3, characterized in that: The left and right side walls of the positioning mold (3) are each provided with four first avoidance grooves (32) for avoiding the first welding gun head (54), and the first avoidance grooves (32) on the left and right side walls are respectively symmetrically arranged one by one. The left and right side walls of the positioning mold (3) are also each provided with two first positioning holes (33) for inserting the first positioning pin (55), and the first positioning holes (33) on the left and right side walls are respectively symmetrically arranged one by one.

5. The metal bracket automatic welding machine according to claim 1, characterized in that: The second welding mechanism (6) comprises a second telescopic cylinder (61) fixed on the frame (100), the upper end of the second telescopic cylinder (61) is connected to a second fixed seat (62), the second telescopic cylinder (61) comprises a third piston rod (611), the other end of the third piston rod (611) is connected to a second connecting seat (63) that can follow the third piston rod (611) to extend and retract, the second connecting seat (63) is arranged toward the upper mold (4), the second connecting seat (63) is connected to a second welding gun head (64), and second positioning pins (65) are symmetrically arranged on both sides of the second welding gun head (64), and the head of the second welding gun head (64) and the second positioning pins (65) are arranged toward the upper mold (4).

6. The metal bracket automatic welding machine according to claim 5, characterized in that: The upper and lower side walls of the positioning mold (3) are each provided with a second avoidance groove (34) for avoiding the first welding gun head (54), and the second avoidance grooves (34) on the upper and lower side walls are symmetrically arranged. The upper and lower side walls of the positioning mold (3) are also each provided with two second positioning holes (35) for inserting the second positioning pin (65), and the second positioning holes (35) on the upper and lower side walls are respectively symmetrically arranged one by one.

7. The metal bracket automatic welding machine according to claim 1, characterized in that: The lifting mechanism (1) comprises a fixed bracket (11) fixedly connected to the frame (100) and a lifting cylinder (12) connected to the lower end of the fixed bracket (11); the fixed bracket (11) comprises a second connecting plate (111), a third connecting plate (112) located above the second connecting plate (111), and a connecting rod (113) connecting and fixing the second connecting plate (111) and the third connecting plate (112); the lifting cylinder (12) comprises a first piston rod ( 121), the other end of the first piston rod (121) is fixedly connected to a fourth connecting plate (122), and the fourth connecting plate (122) is provided with a push rod (123) that passes through the third connecting plate (112) upwards. The lifting cylinder (12) drives the first piston rod (121) to extend and retract, thereby driving the fourth connecting plate (122) to move up and down between the second connecting plate (111) and the third connecting plate (112), and the fourth connecting plate (122) drives the push rod (123) to move up and down in the third connecting plate (112).

8. The metal bracket automatic welding machine according to claim 1, characterized in that: The lower end of the turntable (2) is fixedly connected to the frame (100) via a third fixing seat (22), and a motor (23) for driving the turntable (2) to rotate is connected to the third fixing seat (22).

9. The metal bracket automatic welding machine according to claim 1, characterized in that: The positioning mold (3) is provided with a plurality of positioning grooves (36) for accommodating and positioning the metal bracket parts (200).

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