A welding device for metal guardrail processing

Abstract

This invention discloses a welding device for metal railing processing, belonging to the field of metal welding manufacturing technology. It includes a base, a support assembly, a positioning assembly, and a protective assembly. The support assembly includes a wedge block. The positioning assembly includes a first block slidably disposed on the base, the first block forming a limiting fit with the wedge block, and a second block disposed on the first block. By setting a first block on the base that can move in conjunction with the wedge block, the metal pipe is stably restricted to a predetermined position before welding. The arc-shaped plate automatically enters a shielding position when the metal pipe is clamped, blocking the high-temperature metal spatter that flies outward during welding, reducing the amount of spatter adhering to the surface of the metal pipe and forming metal nodules, thus reducing the amount of subsequent grinding and cleaning work and minimizing damage to the surface of the metal pipe caused by manual cleaning.

Description

Technical Field

[0001] This invention belongs to the field of metal welding manufacturing technology, specifically a welding equipment for processing metal guardrails. Background Technology

[0002] In the automated and semi-automatic welding production of metal guardrails, welding equipment such as electric arc welding or plasma arc welding is usually used to efficiently weld metal pipes. In order to ensure the relative positional accuracy between multiple guardrail pipes, the welding equipment is usually equipped with a special positioning and clamping device to fix the guardrail pipes to be welded in a predetermined position.

[0003] During electric arc welding or plasma arc welding, the high temperature and intense reaction of the arc generate a large amount of metal spatter. These molten metal particles are sprayed in all directions. When the spatter lands on the surface of the guardrail pipes, it adheres firmly to the pipe wall and forms hard metal nodules after cooling. This not only damages the flatness and aesthetics of the guardrail surface but also affects the quality of subsequent surface coating, galvanizing, and other processes. To solve the problem of welding spatter contaminating the guardrail surface, existing welding equipment typically employs manual protective cleaning or the addition of electric protective covers. Manual protective cleaning involves manually shielding the surface with a baffle before welding or, after welding, having the operator use an angle grinder, etc. Manual grinding and cleaning of the adhering spatter with tools such as chisels increases the labor intensity of workers and reduces the automation level and production efficiency of the overall welding production line. Furthermore, manual grinding makes it difficult to guarantee consistent quality, and frequent grinding operations can damage the guardrail pipes. Electric protective covers, on the other hand, are additional protective covers driven by motors or independent cylinders, installed in addition to the clamping device. Before welding begins, the control system drives the protective cover to move around the welding area to physically block the spatter. This not only increases the manufacturing and maintenance costs of the equipment but also makes the mechanical structure of the clamping area bulky, which can interfere with the movement trajectory of the welding robot or welding torch and limit the flexibility of the welding torch. Summary of the Invention

[0004] To address the issue of metal splatter adhering firmly to the pipe wall when it lands on the guardrail pipe.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A welding device for processing metal guardrails includes a base, a support assembly, a positioning assembly, and a protective assembly, wherein the support assembly includes a wedge block. The positioning component includes a first block that is slidably disposed on the base, the first block forming a limiting engagement with the wedge block, and a second block disposed on the first block; The protective assembly includes a bushing body, and the top of the bushing body is provided with an arc-shaped plate. Let the direction in which the wedge moves downward be the first direction, the direction in which the first block approaches the center of the base be the second direction, and the direction in which the arc-shaped plate swings towards the metal pipe be the third direction. When the wedge moves along the first direction, the first block moves along the second direction to clamp the metal pipe. The first block drives the bushing to move, and the bushing drives the arc-shaped plate to approach the metal pipe along the third direction.

[0006] Preferably, the support assembly further includes a power component, the base has a through hole, the power component is located below the base, the output end of the power component has a first rod, the first rod passes through the through hole, and the wedge is located on top of the first rod.

[0007] Preferably, the wedge block body is provided with a first inclined portion, the first inclined portion is provided with a first guide member, the first block body is provided with a second inclined portion, the second inclined portion is in contact with the first inclined portion, the first block body is provided with a second groove, and the first guide member is slidably disposed in the second groove.

[0008] Preferably, the base is provided with a second guide member, the first block is provided with a first groove, the first groove is slidably engaged with the second guide member, and the second block is provided with a third groove on the side facing the center of the base, the third groove being used to fit the outer wall of the metal pipe.

[0009] Preferably, the protective assembly further includes a first engaging member disposed on the base, and a second engaging member disposed on the bushing body. The second engaging member engages with the first engaging member. When the first block moves the bushing body, the second engaging member moves along the first engaging member and drives the bushing body to rotate.

[0010] Preferably, a shaft is slidably disposed within the bushing body, an arc-shaped plate is disposed on the shaft, and a first limiting member is provided on the shaft. The first limiting member cooperates with the bushing body to limit rotation, so that the shaft can slide relative to the bushing body and can rotate with the bushing body.

[0011] Preferably, the protective assembly further includes a second limiting member disposed on the base, the second limiting member having a second engaging member inside, the second engaging member being connected to the bushing body, the second limiting member restricting the second engaging member from disengaging, and allowing the second engaging member to move and rotate within the second limiting member.

[0012] Preferably, the base is provided with a seat body, and a swinging member is rotatably provided on the seat body. A second rod body is provided between the first block body and the swinging member. A conductive member is provided on the swinging member. When the first block body moves along the second direction, the first block body pulls the swinging member through the second rod body, so that the conductive member presses the metal pipe.

[0013] Preferably, the swing member has a short arm and a long arm, the short arm is rotatably connected to the base, the second rod is connected to the short arm, the conductive member is disposed on the long arm, the bottom end of the conductive member is conical, and the conductive member is used to pierce the surface of the metal pipe and be electrically connected to the grounding terminal.

[0014] Preferably, there are two first blocks, which are located on opposite sides of the center of the base. Each first block is provided with a second block. There are two bushings, which are provided with the arc-shaped plate. When the two first blocks move along the second direction, the two second blocks approach each other and clamp the metal pipe. The two arc-shaped plates approach each other along the third direction and block welding spatter.

[0015] The beneficial effects of this invention are as follows: 1. By setting a first block on the base that can be linked with the wedge block, the first block can be moved towards the center of the base when the wedge block moves downward. The first block then drives the second block to clamp the metal pipe, so that the metal pipe is stably restricted in a predetermined position before welding. The arc-shaped plate is set on the bushing and the bushing moves with the first block. The clamping action can synchronously drive the arc-shaped plate to approach the metal pipe. When the metal pipe is clamped, the arc-shaped plate automatically enters the shielding position to block the high-temperature metal spatter that flies outward during welding, reducing the amount of spatter adhering to the surface of the metal pipe and forming metal nodules, reducing the amount of subsequent grinding and cleaning work, and reducing the damage to the surface of the metal pipe caused by manual cleaning. Second, by linking the protective action with the clamping action mechanically, there is no need to set up an independent electric protective cover outside the clamping device. This reduces the number of driving and control components, lowers equipment manufacturing and maintenance costs, and reduces the space occupied by the protective structure on the welding torch. The setting of a pressing and grounding structure that moves with the first block ensures that the metal pipe is simultaneously subjected to downward pressure and a welding grounding circuit is established during the clamping process. This improves the positional stability of the metal pipe during welding, reduces displacement and warping under the action of welding heat, and thus improves the consistency and production efficiency of metal guardrail welding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a bottom view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the wedge block structure of the present invention; Figure 4 This is a schematic diagram of the first guide member structure of the present invention; Figure 5 This is a schematic diagram of the first block structure of the present invention; Figure 6 This is a schematic diagram of the arc-shaped plate structure of the present invention; Figure 7 This is a schematic diagram of the bushing structure of the present invention; Figure 8 This is a schematic diagram of the swing component structure of the present invention; Figure 9 This is a schematic diagram of the second rod structure of the present invention.

[0017] In the diagram: 1. Base; 2. Support assembly; 21. Power component; 22. First rod; 23. Wedge block; 231. First inclined part; 232. First guide component; 24. Second guide component; 25. Through hole; 3. Positioning assembly; 31. First block; 311. Second inclined part; 312. First groove; 313. Second groove; 32. Second block; 321. Third groove; 4. Protective assembly; 41. First engaging component; 42. Bushing; 421. Shaft; 422. First limiting component; 43. Second limiting component; 431. Second engaging component; 44. Arc-shaped plate; 45. Seat; 46. Swing component; 47. Second rod; 48. Conductive component. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] Please see Figure 1 As shown, a welding equipment for processing metal railings includes a base 1, a support component 2, a positioning component 3, and a protective component 4.

[0020] It should be noted that, in combination Figure 1 The equipment is placed at the bottom of the welding workstation. The metal pipe is initially placed above the positioning component 3, between the two second blocks 32, and the welding torch is placed above the metal pipe.

[0021] like Figures 1 to 3As shown, the support assembly 2 includes a power component 21 and a first rod 22. The power component 21 is preferably a cylinder with a pressure limit. The top surface of the power component 21 is fixedly mounted on the lower surface of the base 1. A through hole 25 is provided in the middle of the base 1. The first rod 22 passes upward through the through hole 25 of the base 1. The bottom end of the first rod 22 is fixedly connected to the output end of the power component 21. When the power component 21 is working, the first rod 22 can move stably in the vertical direction, such as... Figure 4 and Figure 5 As shown, the support assembly 2 also includes a wedge block 23, which is fixedly installed on the top of the first rod 22. The first limiting member 422 is a sliding key. The wedge block 23 has a wedge-shaped structure from top to bottom, which is narrow to wide. The two sides of the wedge block 23 are first inclined portions 231. Each surface of the first inclined portion 231 is fixedly provided with a first guide member 232. The first guide member 232 is preferably a T-shaped guide bar. The length extension direction of the first guide member 232 is consistent with the inclination direction of the first inclined portion 231.

[0022] When using, combine Figures 1 to 5 After the power component 21 is started, its output end drives the first rod 22 to move vertically. The first rod 22 drives the wedge block 23 at its top to move vertically in sync. When the wedge block 23 moves, it can transmit thrust to the positioning component 3 through the first inclined part 231, converting the vertical thrust into the horizontal thrust.

[0023] like Figures 3 to 5 As shown, the positioning component 3 can work in conjunction with the support component 2. The positioning component 3 includes two first blocks 31. Two second guide members 24 are symmetrically fixedly installed on the upper surface of the base 1. The two first blocks 31 are slidably connected to the corresponding second guide members 24. A first groove 312 is provided on the bottom surface of each first block 31. Each first block 31 is slidably connected to the corresponding second guide member 24 through the first groove 312. A second inclined portion 31 is provided on the side surface of each first block 31 facing the wedge block 23. 1. The tilt angle of the second tilting part 311 is the same as that of the first tilting part 231, so that the first tilting part 231 can smoothly push the second tilting part 311. Each first block 31 has a second groove 313 inside. The second groove 313 is preferably a T-shaped groove. The shape of the second groove 313 matches the shape of the first guide 232. Each first block 31 slides on the surface of the corresponding first guide 232 through the second groove 313. The first guide 232 can restrict the first block 31 from disengaging from the wedge block 23.

[0024] like Figures 3 to 5As shown, the second inclined part 311 is located on both sides of the second groove 313 and is in contact with the surface of the first inclined part 231. When the wedge block 23 moves upward, the first inclined part 231 pushes the first block 31 to move to both sides of the base 1 through the second inclined part 311. When the wedge block 23 moves downward, the first guide 232 moves downward synchronously. Through its cooperation with the second groove 313, and under the limiting action of the second guide 24, it pulls the first block 31 to move towards the center of the base 1.

[0025] like Figure 4 and Figure 5 As shown, the positioning component 3 also includes two second blocks 32, each of which is fixedly installed on the top surface of the corresponding first block 31. Each second block 32 has a third groove 321 on the side facing the center of the base 1. The third groove 321 is preferably a V-shaped groove that matches the shape of the outer wall of the metal pipe.

[0026] When using, combine Figures 1 to 5 The power component 21 drives the wedge block 23 to move downward. When the wedge block 23 moves, it drives the first guide component 232 to move downward synchronously. The first guide component 232 applies a pulling force to the second groove 313. Under the limitation of the second guide component 24, the two first blocks 31 move towards the center of the base 1. The first blocks 31 drive the second blocks 32 to move synchronously. The two third grooves 321 gradually approach the metal pipe until the third grooves 321 press against the outer wall of the metal pipe, so that the metal pipe is kept in the predetermined welding position.

[0027] like Figure 1 , Figure 6 and Figure 7 As shown, the protective component 4 is located around the positioning component 3. The protective component 4 can shield welding spatter and establish a welding grounding circuit. The protective component 4 includes two first engaging members 41. The bottom ends of the two first engaging members 41 are fixedly installed on the upper surface of the base 1. The first engaging member 41 is preferably a rack. The installation direction of the first engaging member 41 is parallel to the second guide member 24.

[0028] like Figure 6 and Figure 7As shown, the protective assembly 4 also includes two bushings 42, each bushing 42 being rotatably mounted on the side wall of the first block 31. A rotating frame is mounted on the side wall of the first block 31, and the bushing 42 is inserted into the rotating frame, allowing the bushing 42 to translate with the first block 31 and rotate relative to it. Each bushing 42 has a shaft 421 inserted inside, and the shaft 421 is rotatably connected to the rotating frame on the side wall of the first block 31. The outer circumferential shape of the shaft 421 matches the inner hole shape of the bushing 42. The bushing 42 rotates within the rotating frame, and the shaft 421 passes through the bushing 42, allowing it to move axially along the bushing 42. The inner sidewall of body 42 is provided with a keyway, and the outer sidewall of shaft body 421 is fixedly provided with a first limiting member 422. The first limiting member 422 is preferably a sliding key. The first limiting member 422 is inserted into the keyway of the bushing body 42, so that the shaft body 421 can slide axially relative to the bushing body 42 and can receive the rotational torque transmitted by the bushing body 42. Thus, when the first block 31 is translated, the shaft body 421 can move synchronously with the first block 31. With the cooperation of the first limiting member 422 and the keyway of the bushing body 42, the shaft body 421 can slide out relative to the bushing body 42, while maintaining its transmission effect with the bushing body 42, so that the bushing body 42 can always drive the shaft body 421 to rotate.

[0029] like Figure 6 and Figure 7 As shown, two second limiting members 43 are symmetrically installed on the top of the base 1. A second engaging member 431 is slidably arranged in each second limiting member 43. A limiting groove is opened on the inner side wall of each second limiting member 43. A limiting plate is fixedly connected to the bottom of each second engaging member 431. Through the cooperation of the limiting plate and the limiting groove, the second engaging member 431 can slide and rotate in the second engaging member 431, but cannot disengage from the second engaging member 431. The middle part of each second engaging member 431 is fixedly connected to the corresponding bushing body 42. The second engaging member 431 is preferably a gear. Each second engaging member 431 is respectively engaged with the corresponding first engaging member 41. There is a clearance between the first engaging member 41 and the first block 31.

[0030] like Figure 8 and Figure 9As shown, two base bodies 45 are symmetrically fixedly installed on the upper surface of the base 1. Each base body 45 has a swing member 46 hinged to its top. The swing member 46 is L-shaped and includes a short arm extending away from the base 1 and a long arm extending towards the center of the base 1. The intersection of the short and long arms is hinged to the base body 45 by a pin. A second rod 47 is hinged to the outer wall of each first block 31. The other end of each second rod 47 is hinged to the short arm of the corresponding swing member 46, with the hinge point located at the end of the short arm away from the base body 45. When the first block 31 moves towards the center of the base 1, the second rod 47... 7. Pull the short arm of the swing member 46. With the base 45 fixed, the short arm deflects around the hinge point with the base 45 after being pulled. The long arm of the swing member 46 swings downward. When the first block 31 moves away from the center of the base 1, the second rod 47 pushes the short arm of the swing member 46 to deflect away from the center of the base 1. The long arm of the swing member 46 swings upward. A conductive element 48 is fixedly installed at the end of the long arm of each swing member 46. The conductive element 48 is preferably made of copper. The bottom end of the conductive element 48 is conical. The conductive element 48 can form an elastic clamp after contacting the metal tube.

[0031] It should be noted that during the horizontal movement of the first block 31, the protective component 4 has two sets of synchronously triggered mechanical linkage states.

[0032] First linkage state, combined with Figure 6 and Figure 7 When the first block 31 slides towards the center of the base 1, the first block 31 drives the rotating frame on its side wall to move synchronously. The rotating frame drives the bushing 42 to move synchronously towards the center of the base 1. The bushing 42 drives the second engaging member 431 to move synchronously within the second limiting member 43. Since the second engaging member 431 engages with the first engaging member 41 fixed on the base 1, the second engaging member 431 rotates under the meshing action of the teeth of the first engaging member 41. The second engaging member 431 drives the bushing 42 to rotate. The bushing 42 rotates on its own, and the keyway and the first limiting member 422 cooperate to transmit rotational torque to the shaft 421. The shaft 421 rotates synchronously with the bushing 42, and drives the arc plate 44 to swing towards the center of the base 1. As the first block 31 moves further towards the center of the base 1, the angle at which the arc plate 44 approaches the outer periphery of the metal pipe increases. The two arc plates 44 gradually close together and are located on the radial outer side of the metal pipe to block metal spatter that flies outward to the outside of the base 1 during the welding of the metal pipe.

[0033] The second linkage state, combined with Figure 8 and Figure 9When the first block 31 slides towards the center of the base 1, it applies a pulling force to one end of the second rod 47. The other end of the second rod 47 pulls the short arm of the swing member 46. The swing member 46 swings around the pin on the base 45. Since the long arm of the swing member 46 extends towards the center of the base 1, after the short arm is pulled by the second rod 47, the long arm swings downward. The long arm drives the conductive member 48 to move towards the metal tube. After the conical bottom end of the conductive member 48 contacts the metal tube, the conductive member 48 applies a force to the surface of the metal tube. The downward pressure presses the bottom end of the conductive element 48 into the oxide layer or coating on the surface of the metal pipe, making the conductive element 48 contact the metal substrate of the metal pipe. After the conductive element 48 is electrically connected to the grounding terminal of the welding workstation, the metal pipe, the conductive element 48 and the grounding terminal of the welding workstation together form a welding grounding circuit. The downward pressure of the conductive element 48 simultaneously presses the metal pipe tightly into the third groove 321. The third groove 321 restricts the lateral movement of the metal pipe, and the conductive element 48 restricts the upward movement of the metal pipe, thereby reducing the warping of the metal pipe under the action of welding heat.

[0034] The working principle of this embodiment is as follows: Preparation stage, combined with Figure 1 , Figure 3 and Figure 7 The operator places the metal pipe between the two second blocks 32, so that the metal pipe is located between the two third grooves 321. The welding torch is located above the metal pipe. The operator adjusts the extension length of the shaft 421 relative to the bushing 42 according to the height of the metal pipe, so that the arc plate 44 is located in a suitable blocking position on the outer periphery of the metal pipe. The first limiting member 422 is kept inserted in the keyway of the bushing 42, so that the shaft 421 can rotate synchronously with the bushing 42.

[0035] During the clamping and positioning stage, combined with Figures 1 to 5 After the power component 21 is started, the output end of the power component 21 drives the first rod 22 to move downward. The first rod 22 drives the wedge block 23 to move downward synchronously. When the wedge block 23 moves downward, the first guide 232 slides along the second groove 313. The first guide 232 applies a pulling force to the first block 31 through the second groove 313. Under the limiting action of the second guide 24, the two first blocks 31 move towards the center of the base 1. The first blocks 31 drive the second blocks 32 to move towards the center of the base 1 synchronously. The two third grooves 321 gradually approach the metal pipe and press against the outer wall of the metal pipe, so that the metal pipe is clamped between the two second blocks 32. After the power component 21 reaches the set pressure, it stops outputting to avoid the third grooves 321 generating excessive clamping force on the metal pipe.

[0036] During the joint protection phase, combined with Figure 6 and Figure 7When the first block 31 moves toward the center of the base 1, the first block 31 drives the bushing 42 to move synchronously through the rotating frame. The bushing 42 drives the second engaging member 431 to move along the second limiting member 43. The second limiting member 43 restricts the second engaging member 431 from disengaging through the cooperation of the limiting groove and the limiting plate, and allows the second engaging member 431 to rotate during the movement. The second engaging member 431 engages with the first engaging member 41. When the second engaging member 431 moves along the first engaging member 41, it rotates and drives the bushing 42 to rotate. The bushing 42 drives the shaft 421 to rotate through the cooperation of the keyway and the first limiting member 422. The shaft 421 drives the arc-shaped plate 44 to swing toward the outer periphery of the metal pipe. The two arc-shaped plates 44 gradually approach the metal pipe and form a spatter shielding area, reducing the spread of welding spatter to the outside of the base 1.

[0037] During the linkage and grounding stage, combined with Figure 8 and Figure 9 When the first block 31 moves toward the center of the base 1, the first block 31 pulls the second rod 47, the second rod 47 pulls the short arm of the swing member 46, the swing member 46 rotates around the pin on the base 45, the long arm of the swing member 46 swings downward and drives the conductive member 48 to move toward the metal pipe, the conical bottom end of the conductive member 48 contacts the metal pipe and presses into the surface of the metal pipe, the conductive member 48 pierces the oxide layer or paint film on the surface of the metal pipe and contacts the metal substrate of the metal pipe, the conductive member 48 is electrically connected to the grounding terminal of the welding workstation, so that the metal pipe is clamped and a welding grounding circuit is established at the same time, the conductive member 48 applies a downward clamping force to the metal pipe, and the two third grooves 321 apply a lateral clamping force to the metal pipe, so that the metal pipe remains stable during the welding process.

[0038] During the welding stage, Figure 1 , Figure 3 and Figure 9 The metal pipe is clamped and positioned by two third grooves 321. The conductive element 48 presses the metal pipe and establishes a grounding circuit. The arc-shaped plate 44 is located on the outer periphery of the metal pipe and blocks welding spatter. The welding torch approaches the position to be welded from above the metal pipe. During the welding process, the metal pipe is subject to lateral constraints from the third grooves 321 and downward pressure constraints from the conductive element 48, thus limiting the offset and warping of the metal pipe.

[0039] During the reset phase, combined with Figures 1 to 5 After the metal pipe is processed, the power component 21 drives the first rod 22 to move upward, and the first rod 22 drives the wedge block 23 to move upward synchronously. When the wedge block 23 moves upward, the first inclined part 231 applies a pushing force to the second inclined part 311. Under the limiting action of the second guide component 24, the two first blocks 31 move away from the center of the base 1. The first blocks 31 drive the second blocks 32 to move outward. The two third grooves 321 disengage from the metal pipe, and the metal pipe is released from clamping. Figures 6 to 9 When the first block 31 moves away from the center of the base 1, the first block 31 drives the bushing 42 to move in the opposite direction through the rotating frame. The bushing 42 drives the second meshing member 431 to move in the opposite direction along the first meshing member 41. The second meshing member 431 rotates in the opposite direction under the meshing action of the teeth of the first meshing member 41. The second meshing member 431 drives the bushing 42 to rotate in the opposite direction. The bushing 42 drives the shaft 421 to rotate in the opposite direction. The shaft 421 drives the arc plate 44 to unfold away from the metal pipe. The first block 31 pushes the second rod 47 at the same time. The second rod 47 pushes the short arm of the swing member 46 to deflect away from the center of the base 1. The long arm of the swing member 46 swings upward. The conductive member 48 is separated from the metal pipe. The welding grounding circuit is disconnected, and the equipment returns to the initial state.

[0040] Through the above coordination, the power component 21 only drives the first rod 22 and the wedge block 23 to move, which can drive the two second blocks 32 to complete the clamping of the metal pipe, drive the arc plate 44 to complete the shielding of welding spatter, and drive the conductive component 48 to complete the pressing and grounding. The first guide component 232 cooperates with the second groove 313, so that the first block 31 can complete the clamping and resetting as the wedge block 23 moves up and down. The first meshing component 41 cooperates with the second meshing component 431, so that the linear movement of the first block 31 is converted into the swing of the arc plate 44. The second rod 47 cooperates with the swing component 46, so that the linear movement of the first block 31 is converted into the downward pressing action of the conductive component 48, thereby improving the positioning stability of the metal pipe welding, reducing the scattering of welding spatter, and reducing the warping of the metal pipe welding.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A welding device for processing metal railings, comprising a base (1), a support assembly (2), a positioning assembly (3), and a protective assembly (4), characterized in that: The support component (2) includes a wedge block (23); The positioning component (3) includes a first block (31) slidably disposed on the base (1), the first block (31) and the wedge block (23) forming a limiting fit, and a second block (32) is provided on the first block (31). The protective component (4) includes a bushing body (42), and the top of the bushing body (42) is provided with an arc-shaped plate (44). Let the direction in which the wedge block (23) moves downward be the first direction, let the direction in which the first block (31) approaches the center of the base (1) be the second direction, and let the direction in which the arc-shaped plate (44) swings towards the metal pipe be the third direction. When the wedge block (23) moves along the first direction, the first block (31) moves along the second direction to clamp the metal pipe. The first block (31) drives the bushing (42) to move, and the bushing (42) drives the arc-shaped plate (44) to approach the metal pipe along the third direction.

2. The metal guardrail processing welding apparatus according to claim 1, characterized by: The support assembly (2) also includes a power component (21). The base (1) has a through hole (25). The power component (21) is located below the base (1). The output end of the power component (21) has a first rod (22). The first rod (22) passes through the through hole (25). The wedge block (23) is located on the top of the first rod (22).

3. The metal guardrail processing welding apparatus according to claim 1, characterized by: The wedge block (23) is provided with a first inclined part (231), the first inclined part (231) is provided with a first guide (232), the first block (31) is provided with a second inclined part (311), the second inclined part (311) is in contact with the first inclined part (231), the first block (31) is provided with a second groove (313), and the first guide (232) is slidably disposed in the second groove (313).

4. The metal guardrail processing welding apparatus according to claim 1, characterized by: The base (1) is provided with a second guide (24), the first block (31) is provided with a first groove (312), the first groove (312) is slidably engaged with the second guide (24), and the second block (32) is provided with a third groove (321) on the side facing the center of the base (1), the third groove (321) is used to fit the outer wall of the metal pipe.

5. The apparatus according to claim 1, wherein: The protective assembly (4) further includes a first engaging member (41) disposed on the base (1), and a second engaging member (431) disposed on the bushing body (42). The second engaging member (431) engages with the first engaging member (41). When the first block (31) drives the bushing body (42) to move, the second engaging member (431) moves along the first engaging member (41) and drives the bushing body (42) to rotate.

6. The welding equipment for metal railing processing according to claim 1, characterized in that: A shaft (421) is slidably provided inside the bushing body (42), and an arc-shaped plate (44) is provided on the shaft (421). A first limiting member (422) is provided on the shaft (421). The first limiting member (422) cooperates with the bushing body (42) to limit rotation, so that the shaft (421) can slide relative to the bushing body (42) and can rotate with the bushing body (42).

7. The welding equipment for metal railing processing according to claim 5, characterized in that: The protective assembly (4) further includes a second limiting member (43) disposed on the base (1). The second limiting member (43) has a second engaging member (431) inside it. The second engaging member (431) is connected to the bushing body (42). The second limiting member (43) restricts the second engaging member (431) from disengaging and allows the second engaging member (431) to move and rotate within the second limiting member (43).

8. The welding equipment for metal railing processing according to claim 1, characterized in that: The base (1) is provided with a seat (45), and a swing member (46) is rotatably provided on the seat (45). A second rod (47) is provided between the first block (31) and the swing member (46). A conductive member (48) is provided on the swing member (46). When the first block (31) moves along the second direction, the first block (31) pulls the swing member (46) through the second rod (47), so that the conductive member (48) presses the metal pipe.

9. The welding equipment for metal railing processing according to claim 8, characterized in that: The swing member (46) has a short arm and a long arm. The short arm is rotatably connected to the seat (45). The second rod (47) is connected to the short arm. The conductive member (48) is located on the long arm. The bottom end of the conductive member (48) is conical. The conductive member (48) is used to pierce the surface of the metal pipe and connect electrically to the grounding end.

10. The welding equipment for metal railing processing according to claim 4, characterized in that: There are two first blocks (31), and the two first blocks (31) are located on both sides of the center of the base (1). Each first block (31) is provided with a second block (32). There are two bushings (42), and each bushing (42) is provided with an arc-shaped plate (44). When the two first blocks (31) move along the second direction, the two second blocks (32) approach each other and clamp the metal pipe. The two arc-shaped plates (44) approach each other along the third direction and block welding spatter.

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