Automatic welding equipment for metal profile machining

Abstract

The invention discloses automatic welding equipment for metal profile machining, and relates to the field of welding, the automatic welding equipment comprises a base, a mounting frame, an ejector pin, an air hood and a driving mechanism, an air inlet valve is mounted at the top of the air hood, and a first pressure release valve is mounted at the rear end of the air hood. The ejector pins on the two sides abut against the outer contour of the metal profile to extrude gas in the gas hood to achieve automatic retraction, and the front end contours of the ejector pins are matched with the outer contour of the metal profile. The multiple ejector pins in a rectangular array are arranged to clamp and fix the metal profile, the ejector pins compress gas in the gas hood through the pressure abutting against the metal profile, one ends of the ejector pins deform to be the same as the outer contour of the metal profile, the contact area of the clamp and the metal profile is greatly increased, and the clamping stability is improved; and meanwhile, clamping and fixing can be conducted according to the metal profiles of different shapes and sizes, a new clamp does not need to be detached and replaced, the labor intensity of workers is relieved, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of welding, and in particular to automatic welding equipment for metal profile processing. Background Art

[0002] Metal profiles are objects with certain geometric shapes made of iron or steel and other materials with certain strength and toughness through rolling, extrusion, casting and other processes. This type of material has certain appearance dimensions, certain cross-section shapes, and certain mechanical and physical properties. Profiles can be used alone or further processed into other manufactured products, and are often used in building structures and manufacturing and installation.

[0003] With the continuous development of science and technology, metal profile welding technology has been widely used in various fields. However, there are some problems in the actual use of traditional metal profile welding devices:

[0004] 1. The profile clamp has a single function. Due to the complex and changeable shapes of profiles, such as round, rectangular, I-shaped, V-shaped, L-shaped, U-shaped, etc., when welding and clamping profiles of different shapes, it is necessary to replace the clamps that match the profiles, which is inconvenient to operate. It not only increases the labor intensity of the staff, but also increases the time required for the welding process, reducing work efficiency;

[0005] 2. The clamp is generally assembled by manual clamping. Manual clamping is difficult to ensure the control of the clamping force, and it is easy for the clamping force to be too large or too small. If it is too large, it will cause damage to the metal profile, and if it is too small, the clamping force will be insufficient, and the profile will easily shift during the welding process, thus affecting the welding effect. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an automatic welding device for metal profile processing to solve the problems existing in the above-mentioned background technology.

[0007] The present invention provides the following technical solution: an automatic welding device for metal profile processing, comprising:

[0008] The base has a storage platform in the middle of the top surface of the base, and a plurality of equally spaced mounting holes are provided on both sides of the top surface of the base for mounting the base on the welding equipment by bolts;

[0009] There are two mounting frames, which are slidably mounted on the base and are symmetrically designed;

[0010] There are several ejector pins, which are arranged in a rectangular shape in two mounting frames;

[0011] An air hood is detachably mounted on the rear end of the mounting frame and is connected to a plurality of ejector pins. An air inlet valve is mounted on the top of the air hood and is connected to an air source. A first pressure relief valve is mounted on the rear end of the air hood.

[0012] The driving mechanism can be detachably mounted on the base. The two free ends of the driving mechanism are respectively connected to the two mounting frames to drive the two mounting frames and a plurality of ejectors to move relative to each other. When clamped, the plurality of ejectors on both sides abut against the outer contour of the metal profile to squeeze the gas inside the air hood to achieve automatic retraction, so that the front end contours of the plurality of ejectors match the outer contour of the metal profile.

[0013] Preferably, it also includes:

[0014] A locking mechanism is fixedly mounted on one side of the base and connected to one of the first pressure relief valves through a first exhaust pipe, and the other first pressure relief valve is connected to a second exhaust pipe, and the second exhaust pipe is communicated with the first exhaust pipe;

[0015] A positioning wheel is fixedly mounted on the driving mechanism and corresponds to the locking mechanism on the left and right, and a plurality of slots arranged at equal distances are provided on the outer edge of the positioning wheel;

[0016] The gas discharged through the first pressure relief valve drives the movable end of the locking mechanism to move and plug into the positioning wheel, locking and fixing the driving mechanism, so that the installation frame and ejector pin on the base stop moving, avoiding excessive clamping of the metal profile.

[0017] Preferably, the ejector pin comprises a cylinder, a piston, a telescopic needle, a ejector block and a rubber pad, wherein the cylinder is a hollow structure, the piston is slidably assembled inside the cylinder, one end of the telescopic needle is inserted into the cylinder and connected to the piston, the other end of the telescopic needle is fixedly connected to the ejector block, and the rubber pad is adhered to the other side of the ejector block.

[0018] Preferably, an air chamber is opened at one end of the cylinder, the air chamber is connected to the air cover, and a sliding hole is opened at the other end of the cylinder, the sliding hole is connected to the air chamber, the sliding hole is slidably assembled with the telescopic needle, and a sealing ring is arranged at the sliding hole.

[0019] Preferably, the driving mechanism includes a bidirectional screw, a slider, a motor, and bevel gears, wherein sliding grooves are opened on both sides of the top surface of the base, two sliders are placed in the sliding grooves, the bidirectional screw is rotatably installed in the middle of the sliding grooves, and the bidirectional screw is respectively threadedly sleeved with the two sliders, the motor is detachably installed in the middle of the bottom surface of the base, and the propyne bidirectional screw and the output shaft of the motor are both provided with bevel gears, and the bevel gears are meshed with each other.

[0020] Preferably, the first pressure relief valve includes a valve body, a connecting end, a first spring, an air plug, a limiting groove, an exhaust port, an adjusting head and a pressure plate, wherein one end of the valve body is welded to the connecting end, and the other end is threadedly connected to the adjusting head, the first spring is placed inside the valve body, the air plug is placed inside the valve body and is located at one end of the first spring, a limiting groove is opened inside the valve body, the air plug has a "convex"-shaped structure, and its two ends are slidably placed in the limiting grooves, an exhaust port is arranged in the middle of the valve body, one end of the adjusting head is connected to the pressure plate, and the pressure plate is located inside the valve body to squeeze the other end of the first spring.

[0021] Preferably, the locking mechanism includes a fixed plate, a movable plate, a positioning head, a second spring, a second pressure relief valve and a sealing plug, wherein the fixed plate is detachably mounted on the bottom surface of the base, the movable plate is plugged into the fixed plate, the positioning head is arranged at the front end of the movable plate, a second spring is arranged at a gap position between the fixed plate and the movable plate, and two ends of the second spring are respectively connected to the fixed plate and the movable plate, the front end of the fixed plate is located at the gap position and the second pressure relief valve is detachably mounted thereon, and the bottom of the fixed plate is located at the gap position and the sealing plug is detachably mounted thereon.

[0022] Preferably, the motor adopts a reducer, and the reducer is equipped with a torque limiter.

[0023] Preferably, the top of the storage platform protrudes from the top surface of the base, and the storage platform and the lower bottom inner wall of the mounting frame are at the same level, so that the ejector pins at the bottom contact the top surface of the storage platform to fully clamp the metal profile.

[0024] Preferably, four screw rods arranged in a rectangular shape are welded to the middle of the bottom surface of the base, and a plurality of nuts are threadedly sleeved on the screw rods, wherein the top of the motor is inserted into the threads and fixedly assembled by the nuts.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention arranges a plurality of ejector pins in a rectangular array to clamp and fix the metal profile. The ejector pins use the pressure of contact with the metal profile to compress the gas inside the gas hood, so that one end of the plurality of ejector pins is deformed to be the same as the outer contour of the metal profile. This not only greatly increases the contact area between the clamp and the metal profile and improves the clamping stability, but also can clamp and fix metal profiles of different shapes and sizes without disassembling and replacing new clamps, thus saving time and effort, reducing the labor intensity of the staff and greatly improving the work efficiency.

[0027] 2. The present invention further provides a pressure relief valve on the back of the gas hood, and connects the pressure relief valve to the locking mechanism through an exhaust pipe. When the force of the ejector pin squeezing the metal profile is too large, the ejector pin retracts, causing the gas hood pressure to exceed the set threshold value. The excess gas is discharged into the locking mechanism through the pressure relief valve, and the movable end inside the locking mechanism is ejected and engaged with the positioning wheel on the driving mechanism, thereby realizing automatic locking of the driving mechanism and avoiding the occurrence of excessive or insufficient holding force. This not only effectively protects the metal profile, but also prevents the clamp from loosening, thereby ensuring the effect of subsequent welding work. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 2 It is a schematic diagram of the ejector pin installation structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the ejector structure of the present invention.

[0031] Figure 4 It is a schematic diagram of the base structure of the present invention.

[0032] Figure 5 It is a schematic diagram of the connection structure between the air hood and the locking mechanism of the present invention.

[0033] Figure 6 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0034] Figure 7 It is a schematic structural diagram of the first pressure relief valve of the present invention.

[0035] Figure 8 It is a schematic diagram of the locking mechanism structure of the present invention.

[0036] Fig. 9 It is a schematic diagram of the driving mechanism structure of the present invention.

[0037] Fig.10 It is a schematic diagram of the motor installation structure of the present invention.

[0038] Fig.11 It is a schematic structural diagram of the present invention in a state of clamping a V-shaped metal profile.

[0039] Fig.12 It is a schematic structural diagram of the present invention in a state of clamping a circular metal profile.

[0040] The accompanying drawings are marked as follows: 1. base; 11. slide groove; 12. storage platform; 13. mounting hole; 14. screw; 15. nut; 2. mounting frame; 3. ejector pin; 31. cylinder barrel; 311. air chamber; 312. slide hole; 32. piston; 33. telescopic needle; 34. ejector block; 35. rubber pad; 36. sealing ring; 4. air cover; 5. air inlet valve; 6. first pressure relief valve; 61. valve body; 62. connecting end; 63. first A spring; 64, air plug; 65, limit groove; 66, exhaust port; 67, adjustment head; 68, pressure plate; 7, driving mechanism; 71, bidirectional screw rod; 72, slider; 73, motor; 74, bevel gear; 75, positioning wheel; 8, first exhaust pipe; 9, locking mechanism; 91, fixed plate; 92, movable plate; 93, positioning head; 94, second spring; 95, second pressure relief valve; 96, sealing plug; 10, second exhaust pipe. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0042] The present invention provides an automatic welding device for metal profile processing, such as Figure 1 , 2 , as shown in 4, including:

[0043] A base 1, a storage platform 12 is provided in the middle of the top surface of the base 1, and a plurality of equally spaced mounting holes 13 are provided on both sides of the top surface of the base 1 for mounting the base 1 on the welding equipment by bolts;

[0044] There are two mounting frames 2, which are slidably mounted on the base 1 and are symmetrically designed;

[0045] There are several ejector pins 3, which are arranged in a rectangular shape in two mounting frames 2;

[0046] The gas hood 4 is detachably mounted on the rear end of the mounting frame 2 and is connected to a plurality of ejector pins 3. An air inlet valve 5 is mounted on the top of the gas hood 4 and is connected to an air source. A first pressure relief valve 6 is mounted on the rear end of the gas hood 4.

[0047] The driving mechanism 7 is detachably mounted on the base 1. The two free ends of the driving mechanism 7 are respectively connected to the two mounting frames 2 to drive the two mounting frames 2 and the plurality of ejector pins 3 to move relative to each other. When clamped, the plurality of ejector pins 3 on both sides abut against the outer contour of the metal profile to squeeze the gas inside the gas hood 4 to achieve automatic retraction, so that the front end contours of the plurality of ejector pins 3 match the outer contour of the metal profile.

[0048] A plurality of ejector pins 3 in a rectangular array are used to clamp and fix the metal profile. The ejector pins 3 use the pressure of abutting against the metal profile to compress the gas inside the gas hood 4, so that one end of the plurality of ejector pins 3 is deformed to be the same as the outer contour of the metal profile. This not only greatly increases the contact area between the clamp and the metal profile and improves the clamping stability, but also can clamp and fix metal profiles of different shapes and sizes without disassembling and replacing new clamps, thus saving time and effort, reducing the labor intensity of the staff and greatly improving the work efficiency.

[0049] In this embodiment, it also includes:

[0050] A locking mechanism 9 is fixedly mounted on one side of the base 1 and connected to one of the first pressure relief valves 6 through a first exhaust pipe 8. A second exhaust pipe 10 is connected to the other first pressure relief valve 6. The second exhaust pipe 10 is communicated with the first exhaust pipe 8.

[0051] The positioning wheel 75 is fixedly mounted on the driving mechanism 7 and corresponds to the locking mechanism 9 on the left and right. The outer edge of the positioning wheel 75 is provided with a plurality of slots arranged at equal distances.

[0052] The gas discharged through the first pressure relief valve 6 drives the movable end of the locking mechanism 9 to move and plug into the positioning wheel 75, locking and fixing the driving mechanism 7, so that the installation frame 2 and the ejector pin 3 on the base 1 stop moving, avoiding excessive clamping of the metal profile.

[0053] A first pressure relief valve 6 is additionally provided on the back of the gas hood 4, and the first pressure relief valve 6 is connected to the locking mechanism 9 through the first exhaust pipe 8. When the force of the ejector pin 3 squeezing the metal profile is too large, the ejector pin 3 retracts, causing the pressure of the gas hood 4 to exceed the set threshold value, and the excess gas is discharged into the locking mechanism 9 by the first pressure relief valve 6, and the movable end inside the locking mechanism 9 is ejected and engaged with the positioning wheel 75 on the driving mechanism 7, so as to realize automatic locking of the driving mechanism 7 and avoid the occurrence of excessive or insufficient holding force. It not only effectively protects the metal profile, but also prevents the clamp from loosening, thereby ensuring the effect of subsequent welding work.

[0054] In this embodiment, the ejector pin 3 includes a cylinder 31, a piston 32, a telescopic needle 33, a ejector block 34 and a rubber pad 35, wherein the cylinder 31 is a hollow structure, the piston 32 is slidably assembled inside the cylinder 31, one end of the telescopic needle 33 is inserted into the cylinder 31 and connected to the piston 32, the other end of the telescopic needle 33 is fixedly connected to the ejector block 34, and the rubber pad 35 is adhered to the other side of the ejector block 34.

[0055] The telescopic needle 33 is freely movable in the cylinder 31 by the piston 32 to achieve free extension and retraction. In the initial state, when the enterprise flows into the cylinder 31, the piston 32 moves to one end of the cylinder 31, and the telescopic needle 33 is in a fully extended state. By squeezing the metal profile, the piston 32 squeezes the gas inside the cylinder 31 into the air hood 4. Several cylinders 31 are interconnected with the air hood 4, and the rubber pad 35 is used to improve the protection of the metal profile.

[0056] In this embodiment, an air chamber 311 is opened at one end of the cylinder 31, and the air chamber 311 is connected to the air cover 4. A sliding hole 312 is opened at the other end of the cylinder 31, and the sliding hole 312 is connected to the air chamber 311. The sliding hole 312 is slidably assembled with the telescopic needle 33, and a sealing ring 36 is arranged at the sliding hole 312.

[0057] The air chamber 311 is used to assemble the piston 32, and the sliding hole 312 is used to assemble the telescopic needle 33. The diameter of the air chamber 311 is larger than the sliding hole 312 to prevent the piston 32 from slipping out of the cylinder 31, and a sealing ring 36 is added to the sliding hole 312 to improve the sealing effect.

[0058] In this embodiment, the driving mechanism 7 includes a bidirectional screw rod 71, a slider 72, a motor 73, and bevel gears 74, wherein slide grooves 11 are provided on both sides of the top surface of the base 1, two sliders 72 are placed in the slide grooves 11, and the bidirectional screw rod 71 is rotatably installed in the middle of the slide groove 11, and the bidirectional screw rod 71 is threadedly sleeved with the two sliders 72 respectively, and the motor 73 is detachably installed in the middle of the bottom surface of the base 1, and the output shafts of the propyne bidirectional screw rod 71 and the motor 73 are both provided with bevel gears 74, and the bevel gears 74 are meshed with each other.

[0059] During operation, the motor 73 is turned on to drive the bevel gear 74 at the output shaft to rotate, and the bevel gear 74 drives the bevel gear 74 on the bidirectional screw rod 71 to rotate, so that the bidirectional screw rod 71 rotates. Under the sliding limit of the slide groove 11, the two sliders 72 move relative to each other on the base 1, and then the two mounting frames 2 move relative to each other, so that the several ejector pins 3 thereon clamp and fix the metal profile.

[0060] In this embodiment, the first pressure relief valve 6 includes a valve body 61, a connecting end 62, a first spring 63, an air plug 64, a limiting groove 65, an exhaust port 66, an adjusting head 67 and a pressure plate 68, wherein one end of the valve body 61 is welded to the connecting end 62, and the other end is threadedly connected to the adjusting head 67, the first spring 63 is placed inside the valve body 61, the air plug 64 is placed inside the valve body 61 and is located at one end of the first spring 63, a limiting groove 65 is opened inside the valve body 61, the air plug 64 is in a "convex" shape structure, and its two ends are slidably placed in the limiting groove 65, an exhaust port 66 is set in the middle of the valve body 61, one end of the adjusting head 67 is connected to the pressure plate 68, and the pressure plate 68 is located inside the valve body 61 to squeeze the other end of the first spring 63.

[0061] The adjusting head 67 drives the pressure plate 68 to move and squeeze the first spring 63, thereby adjusting the pressure of the pressure relief valve;

[0062] In the initial state, under the elastic force of the first spring 63, one end of the air plug 64 moves to the port of the valve body 61 and seals the valve body 61;

[0063] When the air pressure inside the air hood 4 is greater than the elastic force of the first spring 63, the air plug 64 slowly moves toward the other end of the valve body 61 and squeezes the first spring 63 to contract until the air plug 64 moves to the exhaust port 66 to discharge the gas. At this time, the first spring 63 loses the squeezing force and immediately resets. The exhausted gas enters the locking mechanism 9 through the first exhaust pipe 8 and is used to push the movable end of the locking mechanism 9.

[0064] In this embodiment, the locking mechanism 9 includes a fixed plate 91, a movable plate 92, a positioning head 93, a second spring 94, a second pressure relief valve 95 and a sealing plug 96, wherein the fixed plate 91 is detachably mounted on the bottom surface of the base 1, the movable plate 92 is plugged into the fixed plate 91, the positioning head 93 is arranged at the front end of the movable plate 92, the second spring 94 is arranged at a gap position between the fixed plate 91 and the movable plate 92, and the two ends of the second spring 94 are respectively connected to the fixed plate 91 and the movable plate 92, the front end of the fixed plate 91 is located at the gap position and the second pressure relief valve 95 is detachably mounted thereon, and the bottom of the fixed plate 91 is located at the gap position and the sealing plug 96 is detachably mounted thereon.

[0065] The excess gas discharged due to the increase in air pressure enters the interior of the fixed plate 91 through the first exhaust pipe 8, thereby pushing the movable plate 92 forward and causing the positioning head 93 to be stuck in the slot of the positioning wheel 75, so that the positioning wheel 75 cannot rotate, thereby locking the output shaft of the motor 73 and preventing it from continuing to rotate. When the gas flowing into the fixed plate 91 is too large and causes the pressure to increase further, the second pressure relief valve 95 is used to relieve the pressure, thereby preventing the two clamps from moving further. When disassembling, it is only necessary to pull out the sealing plug 96, pull back the movable plate 92 under the action of the second spring 94 and discharge the excess gas. At this time, the motor 73 can be turned on in reverse to take out the metal profile.

[0066] In this embodiment, the motor 73 uses a reducer, and the reducer is provided with a torque limiter, which prevents the motor 73 from being damaged when the locking mechanism 9 cooperates with the positioning wheel 75 to lock.

[0067] In this embodiment, the top of the storage platform 12 protrudes from the top surface of the base 1, and the storage platform 12 and the lower bottom inner wall of the installation frame 2 are at the same level, so that the ejector pins 3 at the bottom contact the top surface of the storage platform 12 to fully clamp the metal profile.

[0068] In this embodiment, four rectangularly arranged screw rods 14 are welded to the middle of the bottom surface of the base 1 , and a plurality of nuts 15 are threadedly sleeved on the screw rods 14 , wherein the top of the motor 73 is inserted into the thread and fixedly assembled by the nuts 15 .

[0069] The working principle of the present invention is as follows: firstly, the pressure of the two pressure relief valves is set, and then the metal profile to be welded is placed on the storage platform 12, and then the air inlet valve 5 is opened to inflate the inside of the air hood 4 until a number of ejector pins 3 are fully extended, and then the driving mechanism 7 is opened to drive the two mounting frames 2 and a number of ejector pins 3 to move toward the middle of the base 1, so that a number of ejector pins 3 abut against the metal profile for clamping and fixing. When the force of the ejector pin 3 squeezing the metal profile is too large, the ejector pin 3 retracts, causing the pressure of the air hood 4 to exceed the set threshold value, and the excess gas is discharged into the locking mechanism 9 by the first pressure relief valve 6. The movable end inside the locking mechanism 9 is ejected and engaged with the positioning wheel 75 on the driving mechanism 7 to realize automatic locking of the driving mechanism 7, avoiding the occurrence of excessive or insufficient holding force. It not only effectively protects the metal profile, but also prevents the clamp from loosening, thereby ensuring the effect of subsequent welding work. The metal profile is clamped and fixed by a plurality of ejector pins 3 in a rectangular array, and can be clamped and fixed according to metal profiles of different shapes and sizes. There is no need to disassemble and replace new clamps, which saves time and effort, not only reduces the labor intensity of the staff, but also greatly improves the work efficiency.

[0070] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0071] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. An automatic welding equipment for metal profile processing, characterized in that: include: A base (1), wherein a storage platform (12) is arranged in the middle of the top surface of the base (1), and a plurality of equally spaced mounting holes (13) are provided on both sides of the top surface of the base (1) for mounting the base (1) on the welding equipment by means of bolts; There are two mounting frames (2), which are slidably mounted on the base (1) and are symmetrically designed; A plurality of ejector pins (3) are arranged in a rectangular shape in two mounting frames (2); An air hood (4) is detachably mounted on the rear end of the mounting frame (2) and is connected to a plurality of ejector pins (3). An air inlet valve (5) is mounted on the top of the air hood (4), and the air inlet valve (5) is connected to an air source. A first pressure relief valve (6) is mounted on the rear end of the air hood (4); The driving mechanism (7) is detachably mounted on the base (1). The two free ends of the driving mechanism (7) are respectively connected to the two mounting frames (2) for driving the two mounting frames (2) and the plurality of ejector pins (3) to move relative to each other. When clamping, the plurality of ejector pins (3) on both sides abut against the outer contour of the metal profile to squeeze the gas inside the gas cover (4) to achieve automatic retraction, so that the front end contours of the plurality of ejector pins (3) match the outer contour of the metal profile.

2. The automatic welding equipment for metal profile processing according to claim 1, characterized in that: Also includes: A locking mechanism (9) is fixedly mounted on one side of the base (1) and connected to one of the first pressure relief valves (6) via a first exhaust pipe (8); the other first pressure relief valve (6) is connected to a second exhaust pipe (10), and the second exhaust pipe (10) is in communication with the first exhaust pipe (8); A positioning wheel (75) is fixedly mounted on the driving mechanism (7) and corresponds to the locking mechanism (9) on the left and right. The outer edge of the positioning wheel (75) is provided with a plurality of slots arranged at equal distances. The gas discharged through the first pressure relief valve (6) drives the movable end of the locking mechanism (9) to move and plug into the positioning wheel (75), thereby locking and fixing the driving mechanism (7) and stopping the movement of the mounting frame (2) and the ejector pin (3) on the base (1), thereby avoiding excessive clamping of the metal profile.

3. The automatic welding equipment for metal profile processing according to claim 1, characterized in that: The ejector pin (3) comprises a cylinder (31), a piston (32), a telescopic pin (33), an ejector block (34) and a rubber pad (35), wherein the cylinder (31) is a hollow structure, the piston (32) is slidably assembled inside the cylinder (31), one end of the telescopic pin (33) is inserted into the cylinder (31) and connected to the piston (32), the other end of the telescopic pin (33) is fixedly connected to the ejector block (34), and the other side of the ejector block (34) is adhered to the rubber pad (35).

4. The automatic welding equipment for metal profile processing according to claim 3 is characterized in that: An air chamber (311) is provided at one end of the cylinder (31), and the air chamber (311) is connected to the air cover (4). A sliding hole (312) is provided at the other end of the cylinder (31), and the sliding hole (312) is connected to the air chamber (311). The sliding hole (312) is slidably assembled with the telescopic needle (33), and a sealing ring (36) is provided at the sliding hole (312).

5. The automatic welding equipment for metal profile processing according to claim 1, characterized in that: The driving mechanism (7) comprises a bidirectional screw (71), a slider (72), a motor (73), and bevel gears (74), wherein a slide groove (11) is provided on both sides of the top surface of the base (1), two sliders (72) are placed in the slide groove (11), the bidirectional screw (71) is rotatably mounted in the middle of the slide groove (11), and the bidirectional screw (71) is respectively threadedly sleeved with the two sliders (72), the motor (73) is detachably mounted in the middle of the bottom surface of the base (1), and the output shafts of the propyne bidirectional screw (71) and the motor (73) are both provided with bevel gears (74), and the bevel gears (74) are meshed with each other.

6. The automatic welding equipment for metal profile processing according to claim 1, characterized in that: The first pressure relief valve (6) comprises a valve body (61), a connecting end (62), a first spring (63), an air plug (64), a limiting groove (65), an exhaust port (66), an adjusting head (67) and a pressure plate (68), wherein one end of the valve body (61) is welded to the connecting end (62), and the other end is threadedly connected to the adjusting head (67); the first spring (63) is arranged inside the valve body (61); the air plug (64) is arranged inside the valve body (61) and is located at one end of the first spring (63); a limiting groove (65) is provided inside the valve body (61); the air plug (64) is in a "convex"-shaped structure, and its two ends are slidably placed in the limiting groove (65); an exhaust port (66) is arranged in the middle of the valve body (61); one end of the adjusting head (67) is connected to the pressure plate (68); the pressure plate (68) is located inside the valve body (61) and presses the other end of the first spring (63).

7. The automatic welding equipment for metal profile processing according to claim 2, characterized in that: The locking mechanism (9) comprises a fixed plate (91), a movable plate (92), a positioning head (93), a first spring (94), a second pressure relief valve (95) and a sealing plug (96), wherein the fixed plate (91) is detachably mounted on the bottom surface of the base (1), the movable plate (92) is plugged into the fixed plate (91), the positioning head (93) is arranged at the front end of the movable plate (92), the first spring (94) is arranged at a gap position between the fixed plate (91) and the movable plate (92), and the two ends of the first spring (94) are respectively connected to the fixed plate (91) and the movable plate (92), the front end of the fixed plate (91) is located at the gap position and the second pressure relief valve (95) is detachably mounted thereon, and the bottom of the fixed plate (91) is located at the gap position and the sealing plug (96) is detachably mounted thereon.

8. The automatic welding equipment for metal profile processing according to claim 5, characterized in that: The motor (73) adopts a reducer, and the reducer is equipped with a torque limiter.

9. The automatic welding equipment for metal profile processing according to claim 1, characterized in that: The top of the storage platform (12) protrudes from the top surface of the base (1), and the storage platform (12) and the lower bottom inner wall of the installation frame (2) are at the same level, so that the ejector pin (3) at the bottom contacts the top surface of the storage platform (12) to fully clamp the metal profile.

10. The automatic welding equipment for metal profile processing according to claim 5, characterized in that: Four rectangularly arranged screw rods (14) are welded to the middle of the bottom surface of the base (1), and a plurality of nuts (15) are threadedly sleeved on the screw rods (14), wherein the top of the motor (73) is inserted into the thread and fixedly assembled by the nuts (15).

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