Hardware welding clamp and welding device

Abstract

The invention belongs to the technical field of hardware machining, and discloses a hardware welding clamp and a welding device.The hardware welding clamp comprises an electric air cylinder fixedly arranged on the lateral position of the top of a workbench, a mounting plate fixedly mounted on the top of the electric air cylinder and a supporting plate fixedly arranged on the lateral position of the mounting plate and further comprises a welding head and a welding rod, the welding head is located in the center of the bottom of the mounting plate and used for welding the round pipe. The protection mechanism is installed outside the welding head and used for protecting impurities generated in the welding process, and through cooperation of a protection cover, a moving block, a limiting disc and other structures, the impurities generated in the welding process can be protected conveniently; the hardware welding device solves the problems that an existing hardware welding device is inconvenient to achieve protection in the welding process, hard light, high temperature and splash generated in the welding process are prone to hurting the body of an operator, and the welding position is prone to being polluted.

Description

Technical Field

[0001] The invention belongs to the technical field of hardware processing, in particular to a hardware welding fixture and a welding device. Background Art

[0002] In the hardware manufacturing industry, welding is a common processing technology, which is widely used in the connection and fixation of metal components. Since different hardware parts need to be quickly connected during the hardware production and processing, welding becomes one of the essential processing processes.

[0003] For example, the utility model with publication number CN117381300A discloses a welding and processing equipment for hardware parts for security, including: a support table; a support component, the support component is symmetrically arranged on the outside of the support table; a fixing mechanism; a processing mechanism, the processing mechanism is arranged on the outside of the fixing mechanism; wherein the fixing mechanism includes: a placement component, the placement component is slidably connected to the support table; a positioning component, the positioning component is symmetrically arranged on both sides of the placement component; a clamping component, the clamping component is arranged around the outside of the placement component and is connected to the placement component; a control component, the control component is connected to the support table and the placement component. By setting the fixing mechanism, the processed hardware products are clamped and fixed in four directions respectively. The fixture has a simple structure and is easy to manufacture, which can effectively reduce the manufacturing cost of tooling, and can also lift the product to facilitate people to take it out.

[0004] The strong light, high temperature, spatter and harmful gases generated during the welding process of the above-mentioned device pose a potential safety threat to the operators and surrounding equipment. Traditional welding protection measures usually rely on the operators wearing protective equipment, such as welding masks, protective gloves and protective clothing, but these measures are often unable to fully and effectively protect the operators from the various hazards generated during the welding process; in addition, the existing welding fixtures and devices are mainly designed to focus on the fixation and positioning of the workpiece, while insufficient consideration is given to the protective function during the welding process. Although some welding fixtures can stably clamp the workpiece, they cannot effectively block spatter or isolate high-temperature areas during the welding process, resulting in operators still facing high safety risks. At the same time, the deficiencies in the protective performance of existing devices may also affect the welding quality. For example, spatter may contaminate the welding area, resulting in a decrease in weld quality.

[0005] Therefore, a hardware welding fixture and a welding device are proposed to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the problem in the above background technology that the existing hardware welding devices are not easy to protect during the welding process, which may cause the strong light, high temperature and splashes generated during welding to harm the operator's body and also easily contaminate the welding point, the present invention provides a hardware welding fixture and a welding device.

[0007] To achieve the above object, the present invention provides the following technical solution: a hardware welding fixture, comprising a workbench, a support frame fixedly arranged at four corners of the bottom of the workbench, and fixtures arranged on both sides of the workbench symmetrically.

[0008] The clamp includes two groups of vertical plates fixedly arranged on both sides symmetrically of the top of the workbench, arc-shaped clamping blocks fixedly arranged on the sides close to each other of the two groups of vertical plates, and an electric push rod fixedly arranged on the side of the vertical plate away from the arc-shaped clamping blocks and fixedly connected to the side of the workbench, a slide groove is provided on the workbench, the vertical plate slides along the slide groove, the surface of the workbench is provided with strip holes, and the clamp clamps a round tube.

[0009] A hardware welding device, comprising an electric cylinder fixedly arranged at a side position of the top of a workbench, a mounting plate fixedly installed on the top of the electric cylinder and a support plate fixedly arranged at a side position of the mounting plate, and further comprising:

[0010] A welding head, which is located at the bottom center of the mounting plate and is used for welding the round pipe;

[0011] A protection mechanism, which is installed outside the welding head and is used to protect against impurities generated by welding;

[0012] Among them, the protection mechanism includes a plurality of protective covers arranged in a circular array around the welding head, a limit plate arranged on the top of the plurality of protective covers and fixedly connected to the mounting plate, and a driving assembly arranged inside the limit plate for driving the range adjustment of the protective covers, and the bottom center of the limit plate is fixedly connected to the top of the welding head.

[0013] The arc-shaped clamping block (122) is divided into a first arc-shaped clamping block and a second arc-shaped clamping block, the first arc-shaped clamping block comprises a first outer layer and a first inner layer, the first outer layer is an elliptical structure that is close to rigidity, the ratio of the long side to the short side of the ellipse is 10:9, and the long side is parallel to the horizontal plane of the workbench (1); the first inner layer is an elastic elliptical structure, the ratio of the long side to the short side of the ellipse is 4:3, and the long side is parallel to the horizontal plane of the workbench (1);

[0014] The second arc-shaped clamping block comprises a second outer layer and a second inner layer, the second outer layer is an elliptical structure that is nearly rigid, the ratio of the long side to the short side of the ellipse is 10:9, and the long side is parallel to the horizontal plane of the workbench (1); the second inner layer is an elastic elliptical structure, the ratio of the long side to the short side of the ellipse is 5:3, and the long side is parallel to the horizontal plane of the workbench (1).

[0015] Preferably, the plurality of protective covers are in an arc shape opening downward and extending in a large bottom and small top trend, two protective covers located on both sides symmetrically above the round tube are provided with slots for accommodating the round tube, and moving blocks are fixedly provided on the tops of the plurality of protective covers. Insertion holes are provided on the ends of the plurality of moving blocks close to each other, and moving rods are fixedly connected to the bottoms of the moving blocks.

[0016] Preferably, the limiting plate is disc-shaped and has a plurality of movable grooves distributed in a circular array at the bottom, and a plurality of insertion grooves distributed in a circular array are provided on the side wall of the limiting plate close to the movable groove. The movable rod is slidably engaged in the interior of the movable groove, and the movable block slides along the insertion groove.

[0017] Preferably, the driving assembly includes a driving block rotatably arranged inside the limiting plate, a fixed plate arranged on the top of the driving block for driving the driving block to rotate, a rotating shaft fixedly arranged at the top center position of the fixed plate and passing through the protective cover, and a control motor fixedly arranged on the top of the rotating shaft and fixedly connected to the mounting plate.

[0018] Preferably, the driving block is in an irregular convex shape and the convex blocks are distributed in a circular array around the driving block, and a plurality of driving rods distributed in a circular array are fixedly arranged on the top of the driving block.

[0019] Preferably, a plurality of arcuate grooves distributed in a ring array are formed on the surface of the fixing plate, and the arcuate grooves are slidably engaged with the driving rod.

[0020] Preferably, a reset spring is provided inside the fixed sleeve of the insertion hole, and the reset spring is in a circular ring shape and deforms with the movement of the moving block.

[0021] Preferably, a ventilation mechanism is provided on the support plate, and the ventilation mechanism includes a ventilation pipe, a connecting arc plate fixedly arranged on the outer wall of the ventilation pipe and fixedly connected to one of the inner walls of the protective cover, and a blower box fixedly arranged on the top of the support plate and connected to the side of the ventilation pipe away from the protective cover.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention facilitates the protection of impurities generated during the welding process by setting up the cooperation of structures such as the protective cover, the moving block and the limit plate. The round pipe to be welded is clamped and fixed by the clamp. After the fixing is completed, the electric cylinder drives the mounting plate to descend, and drives the welding head to descend to the surface of the round pipe for welding. During the welding process, precise protection is achieved by cooperating with the protective mechanism. According to the diameter of the round pipe, the position of the protective cover can be flexibly adjusted to adapt to round pipes of different sizes to ensure the protective effect. In addition, the protective cover can be synchronously descended with the mounting plate to completely cover the entire welding area, provide comprehensive protection, and effectively prevent spatter and heat radiation during welding. The problem that the existing hardware welding device is not convenient for protection during welding, which easily causes the strong light, high temperature, and spatter generated during welding to hurt the operator's body and also easily contaminates the welding point is solved.

[0024] The present invention facilitates the reasonable adjustment of the spacing between the protective covers and improves the protective effect by arranging the cooperation of structures such as the driving block, the fixed disk, the control motor and the reset spring. The driving assembly is used to drive the moving block to move in the limiting disk, and the control motor is used to drive the rotating shaft to rotate, thereby driving the fixed disk to rotate synchronously. Since the driving rod is clamped in the inside of the arc groove, when the fixed disk rotates, the driving rod will be driven to deflect at an angle, thereby driving the driving block to rotate. The driving block is an irregular convex block. When the protruding end of the driving block rotates to the side close to the moving block, the moving block is squeezed to move outward, so that the moving rod at the bottom of the moving block slides along the moving groove on the limiting disk, and the moving block moves along the inserted groove to a position away from the center, thereby achieving the effect of simultaneously expanding multiple protective covers to the outside, driving the reset spring to twist, and increasing the protection range. When the driving block rotates to the recessed position close to the moving block, the moving block loses the extrusion force. At this time, the reset spring is reset and drives the moving block to move closer to the center along the inserted groove, thereby achieving the effect of driving the protective cover to reduce the protection range.

[0025] The present invention ensures that the area space covered by the protection mechanism is as consistent as possible with the outside temperature by arranging ventilation mechanisms, strip holes, waste bins and fans, which is equivalent to simulating the situation that the area is not covered by the protection mechanism and is exposed in the normal temperature environment space. It ensures that when the protection mechanism is raised, the round tube is cooled naturally, while the temperature is abnormally high after being covered by the non-protective mechanism, resulting in a large temperature difference with the ambient temperature and a sudden drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structural matching relationship between the welding head and the ventilation mechanism of the present invention;

[0028] Figure 3 for Figure 2 A is an enlarged schematic diagram of the local structure at center A;

[0029] Figure 4 for Figure 2 A magnified schematic diagram of the local structure at B in the middle;

[0030] Figure 5 It is a schematic diagram of the explosion structure of the protective cover and the driving assembly of the present invention;

[0031] Figure 6 It is a schematic diagram of the structural matching relationship between the drive assembly and the return spring of the present invention;

[0032] Figure 7 It is a schematic diagram of the structural matching relationship between the protective cover and the ventilation pipe of the present invention;

[0033] Figure 8 for Figure 7 Enlarged schematic diagram of the local structure at point C in the middle.

[0034] In the figure: 1. workbench; 11. support frame; 12. fixture; 121. vertical plate; 122. arc clamping block; 123. electric push rod; 13. strip hole; 2. round tube; 3. electric cylinder; 31. mounting plate; 32. support plate; 4. welding head; 5. protection mechanism; 51. protection cover; 511. notch; 512. moving block; 5121. insertion hole; 5122. moving rod; 52. limit plate; 521. moving slot; 522. insertion slot; 53. driving assembly; 531. driving block; 5311. driving rod; 532. fixed plate; 5321. arc slot; 533. rotating shaft; 534. control motor; 54. reset spring; 6. ventilation mechanism; 61. ventilation pipe; 62. connecting arc plate; 63. blower box. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 8 As shown, the present invention provides a hardware welding fixture, comprising a workbench 1, a support frame 11 fixedly arranged at four corners of the bottom of the workbench 1, and fixtures 12 arranged on two symmetrical sides of the workbench 1.

[0037] The clamp 12 includes two groups of vertical plates 121 fixedly arranged on both sides symmetrically on the top of the workbench 1, arc-shaped clamping blocks 122 respectively fixedly arranged on the sides close to each other of the two groups of vertical plates 121, and an electric push rod 123 fixedly arranged on the side of the vertical plate 121 away from the arc-shaped clamping block 122 and fixedly connected to the side of the workbench 1. A slide groove is provided on the workbench 1, and the vertical plate 121 slides along the slide groove. A strip hole 13 is provided on the surface of the workbench 1, and the clamp 12 clamps the round tube 2.

[0038] A hardware welding device, comprising an electric cylinder 3 fixedly arranged at a side position on the top of a workbench 1, a mounting plate 31 fixedly arranged on the top of the electric cylinder 3, and a support plate 32 fixedly arranged at a side position on the mounting plate 31, and further comprising:

[0039] A welding head 4, which is located at the bottom center of the mounting plate 31 and is used for welding the round tube 2;

[0040] A protection mechanism 5, which is installed outside the welding head 4 and is used to protect against impurities generated by welding;

[0041] Among them, the protection mechanism 5 includes a plurality of protective covers 51 arranged in a circular array around the welding head 4, a limiting plate 52 arranged on the top of the plurality of protective covers 51 and fixedly connected to the mounting plate 31, and a driving assembly 53 arranged inside the limiting plate 52 for driving the range adjustment of the protective covers 51, and the bottom center of the limiting plate 52 is fixedly connected to the top of the welding head 4.

[0042] The arc-shaped clamping block (122) is divided into a first arc-shaped clamping block (not shown in the figure) and a second arc-shaped clamping block (not shown in the figure). The first arc-shaped clamping block includes a first outer layer and a first inner layer. The first outer layer is an elliptical structure that is close to rigidity. The outer layer adopts an elliptical structure that is close to a circle, which allows the inner layer to be expanded to a circular structure at most, avoiding excessive expansion of the inner layer, which causes the elasticity of the inner layer to eventually fail. The ratio of the long side to the short side of the ellipse is 10:9, and the long side is parallel to the horizontal plane of the workbench (1); the first inner layer is an elastic elliptical structure, the ratio of the long side to the short side of the ellipse is 4:3, and the long side is parallel to the horizontal plane of the workbench (1). The second arc-shaped clamping block comprises a second outer layer and a second inner layer, the second outer layer is an elliptical structure that is close to rigidity, the ratio of the long side to the short side of the ellipse is 10:9, and the long side is parallel to the horizontal plane of the workbench (1); the second inner layer is an elastic elliptical structure, the ratio of the long side to the short side of the ellipse is 5:3, and the long side is parallel to the horizontal plane of the workbench (1), the ratio of the long side to the short side of the second inner layer is different from that of the first inner layer, and the scheme of setting the ratio to be unequal can effectively avoid the first inner layer and the second inner layer from failing at the same time, resulting in the loss of the function of fixing the circular tube.

[0043] The above scheme is adopted: when in use, the circular tube 2 to be welded is clamped and fixed by the clamp 12, and the circular tube 2 is placed between the two arc clamping blocks 122. The two vertical plates 121 are driven to approach each other by the electric push rod 123, and then the two arc clamping blocks 122 are driven to clamp and fix the circular tube 2 at the center. After the fixing is completed, the mounting plate 31 is driven to descend by the electric cylinder 3, and then the welding head 4 is lowered to weld the clamped circular tube 2. During the welding process, reasonable protection is achieved by cooperating with the protection mechanism 5. The position of the protection cover 51 is adjusted according to the diameter of the circular tube 2 to adapt it to the protection of different circular tubes 2. The protection cover 51 can be synchronously lowered with the mounting plate 31 to cover the entire welding position for protection. At the same time, an ingenious arc clamping block structure ratio and an inner and outer structure design of the arc clamping block are set. The inner layer is elastic and the outer layer is close to rigidity, so that the inner layer can fully fix the circular tube (2) through the elastic structure.

[0044] like Figures 3 to 6 As shown, the multiple protective covers 51 are in an arc shape opening downward and extending in a large bottom and small top trend. Two protective covers 51 located on both sides symmetrically above the circular tube 2 are provided with slots 511 for accommodating the circular tube 2. The tops of the multiple protective covers 51 are fixedly provided with moving blocks 512.

[0045] An insertion hole 5121 is provided at one end of each of the plurality of moving blocks 512 that are close to each other, and a moving rod 5122 is fixedly connected to the bottom of each of the moving blocks 512;

[0046] The limiting plate 52 is in a disc shape and has a plurality of moving grooves 521 arranged in a circular array at the bottom. A plurality of insertion grooves 522 arranged in a circular array are arranged on a side of the side wall of the limiting plate 52 close to the moving grooves 521. The moving rod 5122 is slidably engaged in the moving grooves 521, and the moving block 512 slides along the insertion grooves 522.

[0047] The driving assembly 53 includes a driving block 531 rotatably disposed inside the limiting plate 52, a fixed plate 532 disposed on the top of the driving block 531 for driving the driving block 531 to rotate, a rotating shaft 533 fixedly disposed at the center of the top of the fixed plate 532 and penetrating the protective cover 51, and a control motor 534 fixedly disposed on the top of the rotating shaft 533 and fixedly connected to the mounting plate 31;

[0048] The driving block 531 is in an irregular convex shape and the convexities are distributed in a circular array around it. A plurality of driving rods 5311 distributed in a circular array are fixedly arranged on the top of the driving block 531. A plurality of arc grooves 5321 distributed in a circular array are opened on the surface of the fixed disk 532. The arc grooves 5321 are slidably engaged with the driving rods 5311. A reset spring 54 is fixedly sleeved inside the insertion hole 5121. The reset spring 54 is in a circular ring shape and deforms with the movement of the moving block 512.

[0049] The above scheme is adopted: in order to realize the flexible adjustment of the protection range of the protective cover 51, the moving block 512 can be driven to move in the limiting disk 52 by the driving assembly 53. Specifically, the motor 534 is controlled to drive the rotating shaft 533 to rotate, and drive the fixed disk 532 to rotate synchronously. Since the driving rod 5311 is clamped in the arc groove 5321 of the fixed disk 532, the rotation of the fixed disk 532 will drive the driving rod 5311 to deflect at an angle, thereby driving the irregular convex driving block 531 to rotate; when the protruding end of the driving block 531 turns to approach the moving block 512, it will squeeze the moving block 512 to move outward, so that the moving rod 5122 at the bottom of the moving block 512 slides along the moving groove 521 on the limiting disk 52, and at the same time, the moving block 512 moves along the insertion groove 522 in a direction away from the center, thereby achieving the effect of multiple protective covers 51 expanding outward synchronously. During this process, the return spring 54 is twisted, increasing the protection range; when the concave portion of the driving block 531 turns to approach the moving block 512, the moving block 512 loses the squeezing force, and the return spring 54 returns to its original state, driving the moving block 512 to move toward the center position along the insertion groove 522, thereby reducing the protection range of the protective cover 51. This design not only realizes the dynamic adjustment of the protection range, but also ensures the accuracy and stability of the operation.

[0050] like Figures 7 and 8 As shown, a ventilation mechanism 6 is provided on the support plate 32, and the ventilation mechanism 6 includes a ventilation pipe 61, a connecting arc plate 62 fixedly arranged on the outer wall of the ventilation pipe 61 and fixedly connected to the inner wall of one of the protective covers 51, and a blower box 63 fixedly arranged on the top of the support plate 32 and connected to the side of the ventilation pipe 61 away from the protective cover 51.

[0051] In one embodiment, a waste bin (not shown in the figure) is provided below the strip hole, and a fan is embedded on the side wall of the waste bin away from the strip hole. The horizontal height of the fan is as close to the strip hole as possible, the fan is connected to the outside, and the fan is electrically connected to a self-reset button switch. The self-reset button switch is provided on the surface of the workbench, so that when the protective mechanism descends to cover the round tube, the protective mechanism presses the self-reset button switch to power on the fan. The exhaust of the fan will cause some small splashes to enter the waste bin through the strip hole, and because the air outlet of the fan is away from the strip hole and is horizontally set at a high height, some particulate matter can be effectively prevented from being discharged to the outside of the waste bin.

[0052] The above scheme is adopted: during the welding protection process, the integrated ventilation mechanism 6 is used to maintain the normal temperature, so as to avoid that after welding, the temperature of the working space covered by the protection mechanism 5 is too much higher than the stable environment. When the protection mechanism is raised after the operation is completed, the round tube will be deformed due to the sudden drop in temperature. In the specific operation, the ventilation pipe 61 blows the air in the blower box 63 to the welding part of the round tube 2. The ventilated air flows into the waste bin along the strip hole 13 on the workbench 1, and then is discharged from the waste bin.

[0053] Working principle and use process of the present invention: When using the device, first fix the round tube 2 by the clamp 12, then the electric cylinder 3 drives the mounting plate 31 and the welding head 4 to descend and perform welding operation. During welding, according to the diameter of the round tube 2, the driving component 53 adjusts the position of the moving block 512 so that it expands or contracts along the limit plate 52, thereby adjusting the protection range of the protective cover 51 to ensure comprehensive protection. At the same time, the ventilation pipe 61 on the inner wall of the protective cover 51 is started to spray the water in the blower box 63 to the welding part to achieve rapid cooling and further improve the welding effect.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hardware welding fixture, comprising a workbench (1), a support frame (11) fixedly arranged at four corners of the bottom of the workbench (1), and fixtures (12) arranged on two symmetrical sides of the workbench (1), characterized in that: The clamp (12) comprises two groups of vertical plates (121) fixedly arranged on two symmetrical sides of the top of the workbench (1), arc-shaped clamping blocks (122) respectively fixedly arranged on the sides close to each other of the two groups of vertical plates (121), and an electric push rod (123) fixedly arranged on the side of the vertical plates (121) away from the arc-shaped clamping blocks (122) and fixedly connected to the side of the workbench (1), the workbench (1) is provided with a slide groove, the vertical plates (121) slide along the slide groove, the surface of the workbench (1) is provided with a strip hole (13), and the clamp (12) clamps the round tube (2).

2. The hardware welding device according to claim 1, characterized in that: It comprises an electric cylinder (3) fixedly arranged at a side position on the top of the workbench (1), a mounting plate (31) fixedly installed on the top of the electric cylinder (3), and a support plate (32) fixedly arranged at a side position on the mounting plate (31), and also comprises A welding head (4), the welding head (4) being located at the bottom center of the mounting plate (31) and used for welding the round tube (2); A protection mechanism (5), wherein the protection mechanism (5) is installed outside the welding head (4) and is used to protect against impurities generated by welding; The protection mechanism (5) comprises a plurality of protection covers (51) arranged in a circular array around the welding head (4), a limiting plate (52) arranged on the top of the plurality of protection covers (51) and fixedly connected to the mounting plate (31), and a driving component (53) arranged inside the limiting plate (52) for driving the range adjustment of the protection covers (51), and the bottom center of the limiting plate (52) is fixedly connected to the top of the welding head (4); The arc-shaped clamping block (122) is divided into a first arc-shaped clamping block and a second arc-shaped clamping block, the first arc-shaped clamping block comprises a first outer layer and a first inner layer, the first outer layer is an elliptical structure that is close to rigidity, the ratio of the long side to the short side of the ellipse is 10:9, and the long side is parallel to the horizontal plane of the workbench (1); the first inner layer is an elastic elliptical structure, the ratio of the long side to the short side of the ellipse is 4:3, and the long side is parallel to the horizontal plane of the workbench (1); The second arc-shaped clamping block comprises a second outer layer and a second inner layer, the second outer layer is an elliptical structure that is nearly rigid, the ratio of the long side to the short side of the ellipse is 10:9, and the long side is parallel to the horizontal plane of the workbench (1); the second inner layer is an elastic elliptical structure, the ratio of the long side to the short side of the ellipse is 5:3, and the long side is parallel to the horizontal plane of the workbench (1).

3. The hardware welding device according to claim 2, characterized in that: The plurality of protective covers (51) are all in an arc shape opening downward and extending in a manner of being larger at the bottom and smaller at the top; two protective covers (51) located on both sides symmetrically above the circular tube (2) are provided with notches (511) for accommodating the circular tube (2); a moving block (512) is fixedly arranged on the top of the plurality of protective covers (51); an insertion hole (5121) is provided at one end of the plurality of moving blocks (512) close to each other; and a moving rod (5122) is fixedly connected to the bottom of the moving block (512).

4. The hardware welding device according to claim 3, characterized in that: The limiting plate (52) is in the shape of a disk and has a plurality of movable grooves (521) distributed in a circular array at the bottom. A plurality of insertion grooves (522) distributed in a circular array are provided on a side of the side wall of the limiting plate (52) close to the movable grooves (521). The movable rod (5122) is slidably engaged in the interior of the movable groove (521), and the movable block (512) slides along the insertion groove (522).

5. The hardware welding device according to claim 2, characterized in that: The driving assembly (53) comprises a driving block (531) rotatably arranged inside the limiting plate (52), a fixed plate (532) arranged on the top of the driving block (531) for driving the driving block (531) to rotate, a rotating shaft (533) fixedly arranged at the center position of the top of the fixed plate (532) and passing through the protective cover (51), and a control motor (534) fixedly arranged on the top of the rotating shaft (533) and fixedly connected to the mounting plate (31).

6. The hardware welding device according to claim 5, characterized in that: The driving block (531) is in an irregular convex block shape and the convex blocks are distributed in a circular array around the periphery. A plurality of driving rods (5311) distributed in a circular array are fixedly arranged on the top of the driving block (531).

7. The hardware welding device according to claim 6, characterized in that: The surface of the fixed disk (532) is provided with a plurality of arc-shaped grooves (5321) distributed in a ring array, and the arc-shaped grooves (5321) are slidably engaged with the driving rod (5311).

8. The hardware welding device according to claim 4, characterized in that: A return spring (54) is provided inside the fixed sleeve of the insertion hole (5121); the return spring (54) is annular and deforms as the moving block (512) moves.

9. The hardware welding device according to claim 2, characterized in that: A ventilation mechanism (6) is provided on the support plate (32), and the ventilation mechanism (6) comprises a ventilation pipe (61), a connecting arc plate (62) fixedly provided on the outer wall of the ventilation pipe (61) and fixedly connected to the inner wall of one of the protective covers (51), and a blower box (63) fixedly provided on the top of the support plate (32) and connected to a side of the ventilation pipe (61) away from the protective cover (51).

10. The hardware welding device according to claim 1, characterized in that: A waste bin is provided under the strip hole, and a fan is embedded on the side wall of the waste bin away from the strip hole, and the fan is connected to the outside. The fan is electrically connected to a self-reset button switch, and the self-reset button switch is arranged on the surface of the workbench, so that when the protective mechanism descends to cover the round tube, the protective mechanism presses the self-reset button switch to realize the power-on operation of the fan.

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