Two-gas protection type roll shaft welding machine and welding process

Abstract

The invention relates to the technical field of welding machines, in particular to a two-gas protection type roll shaft welding machine and a welding process. The welding machine comprises a machine body, a protection mechanism used for protection during welding is arranged on the machine body, the protection angle of the protection mechanism is adjusted according to different welding operations, when the protection mechanism rotates to be in a horizontal state, the protection face of the protection mechanism is convenient to clean, and the protection mechanism rotates to be in a trapezoid shape and is used for storage. Meanwhile, the cage cover is arranged above the welding device to protect the welding device; the protection mechanism is provided with a fixing mechanism used for limiting after the angle of the protection mechanism is adjusted. The multi-section protection plate is manually pushed, so that the positioning block and the limiting block are separated from clamping connection, then the multi-section protection plate is manually rotated and pushed, the bending angle of the multi-section protection plate is adjusted according to the diameters of different roll shafts, the multi-section protection plate can better shield the exteriors of the roll shafts with different diameters, and the bending angle of the multi-section protection plate is adjusted. And therefore, arc light and splashes are effectively blocked.

Description

Technical Field

[0001] The invention relates to the technical field of welding machines, in particular to a two-gas shielded roller welding machine and a welding process. Background Art

[0002] The two-gas shielded roller welding machine is an advanced equipment specially used for roller welding. During the welding process, a mixed gas composed of two specific gases is continuously ejected from the special gas channel of the welding gun to form a stable protective gas curtain around the welding arc and the molten pool. This gas curtain can strictly separate the welding area from the outside air, prevent oxygen, nitrogen and other components in the air from chemically reacting with the molten metal under the high temperature of the arc, and avoid the occurrence of welding defects such as pores, slag inclusions, and oxidation. During the welding process, welding will produce strong arc light, splashing slag, high temperature and other dangerous factors. Usually, a protective plate is installed on one side of the equipment to effectively block the arc light from damaging the operator's eyes, prevent splashing objects from scalding the operator's skin, reduce the personal safety risks caused by welding operations, and create a relatively safe working environment for the operator.

[0003] Most of the existing protective plates are connected to the side walls of the equipment by sliding connections. Their main mode of movement is usually linear sliding along the equipment, and the sizes of the protective plates are mostly fixed. However, the diameters of rollers vary. When welding rollers with larger diameters, the protective plates may not be able to completely cover the welding area, so that the arc light, spatter, etc. generated by the welding can escape from the gap between the protective plate and the roller, which may cause blind spots in the protection and reduce the actual protective effect of the protective plate. Summary of the invention

[0004] The purpose of the present invention is to provide a two-gas shielded roller welding machine and a welding process to solve the problems raised in the above background technology.

[0005] To achieve the above object, one of the objects of the present invention is to provide a two-gas shielded roller welding machine, comprising a machine body, the machine body is provided with a protection mechanism for protection during welding, the protection mechanism is used to adjust the protection angle of the protection mechanism according to different welding operations, when the protection mechanism is rotated to a horizontal state, it is convenient to clean the protection surface of the protection mechanism, the protection mechanism is rotated into a ladder shape for storage, and at the same time covers the top of the welder to protect the welder; The protection mechanism is provided with a fixing mechanism for limiting the position after the protection mechanism angle is adjusted.

[0006] As a further improvement of the technical solution, the protective mechanism at least includes a fixed plate slidably connected to the machine body, and a plurality of protective plates are rotatably connected to the fixed plate.

[0007] As a further improvement of the present technical solution, the fixing mechanism includes at least a mounting rod fixedly connected to the fixing plate, two connecting rods are fixedly connected to both sides of the multi-section protective plate, and the two connecting rods are rotatably connected to both sides of the mounting rod, one side of the mounting rod is fixedly connected to a plurality of limit blocks, and the side of the connecting rod close to the limit block is fixedly connected to a plurality of positioning blocks.

[0008] As a further improvement of the technical solution, the inner walls on both sides of the mounting rod are rotatably connected to a No. 1 return spring, and the side of the No. 1 return spring away from the mounting rod is fixedly connected to the adjacent connecting rod.

[0009] As a further improvement of the technical solution, the fixing mechanism is provided in a plurality of groups, the multi-section protection plate is composed of a plurality of baffles, and two adjacent baffles are connected by the fixing mechanism.

[0010] As a further improvement of the technical solution, the inner wall of the multi-section protective plate is slidably connected with a movable plate, and a plurality of limiting holes are opened on one side of the movable plate.

[0011] As a further improvement of the present technical solution, a circular hole is opened on one side of the multi-section protective plate, a T-shaped rod is slidably connected in the circular hole, the T-shaped rod passes through the circular hole and is inserted into the limiting hole of the movable plate, a No. 2 return spring is fixedly connected to the outer wall of the multi-section protective plate, and the No. 2 return spring is fixedly connected to the outer wall of the T-shaped rod on the side away from the multi-section protective plate.

[0012] As a further improvement of the present technical solution, a slide groove is provided on one side of the body close to the fixed plate, and a card block is arrayed in the slide groove; a slider is fixedly connected to one side of the fixed plate close to the slide groove, and the slider is slidably connected to the slide groove; a through hole is provided on the fixed plate, and the through hole passes through the slider setting; a limit rod is slidably connected in the through hole, and the limit rod extends into the inside of the slide groove; the limit rod is fixedly connected to a support block on one side of the slide groove, and the support block is clamped in the gap between the two blocks; a No. 3 return spring is fixedly connected to one side of the support block away from the body, and the No. 3 return spring is fixedly connected to the inner wall of the fixed plate on the side away from the support block.

[0013] The second object of the present invention is to provide a two-gas shielded roller shaft welding process, which is applied to any one of the two-gas shielded roller shaft welding machines described above, and comprises the following steps: Step 1: During welding, manually press the protective mechanism to drive the protective mechanism to move elastically so that the fixing mechanism does not limit the protective mechanism, and then manually rotate the protective mechanism to adjust the angle of the protective mechanism; Step 2: After the angle adjustment of the protection mechanism is completed, the protection mechanism is manually released to engage with the fixing mechanism through elastic movement of the protection mechanism.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the two-gas shielded roller welding machine and welding process, the multi-section protective plate is manually pushed to disengage the locking between the positioning block and the limit block, and then the multi-section protective plate is manually rotated and pushed to adjust the bending angle of the multi-section protective plate according to the size of different roller diameters, so that the multi-section protective plate can better shield the outside of rollers with different diameters, thereby effectively blocking arc light and spatter.

[0015] 2. In the two-gas shielded roller welding machine and welding process, when welding is not required, the multi-section protective plate is rotated into a trapezoidal shape, so as to avoid the multi-section protective plate extending vertically to occupy too much unnecessary space when not in use, and the multi-section protective plate is in a trapezoidal shape and covers the top of the welder, which plays a multi-directional protective role on the welder to a certain extent; When the multi-segment protective plate needs to be cleaned, the multi-segment protective plate is rotated to a horizontal state without removing the multi-segment protective plate from the machine body. The multi-segment protective plate can be flipped over to clean the protective surface of the multi-segment protective plate, thereby improving the cleaning efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the protection mechanism of the present invention; Figure 3 An exploded view of the protection mechanism of the present invention; Figure 4 It is a schematic diagram of the overall side section structure of the present invention; Figure 5 It is a schematic diagram of the enlarged structure of point A of the present invention; Figure 6 It is a cross-sectional schematic diagram of the fixing plate of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the movable plate of the present invention; Figure 8 It is a schematic diagram of the enlarged structure of point B of the present invention; Fig. 9 A plan view of a multi-segment protective plate in a first state of the present invention; Fig.10 It is a plan view of the second state of the multi-segment protective plate of the present invention.

[0017] The meaning of each number in the figure is: 100, body; 110, card block; 200, protection mechanism; 210, fixed plate; 211, slider; 212, limit rod; 213, support block; 214, No. 3 return spring; 220, multi-section protection plate; 230, movable plate; 231, T-bar; 232, No. 2 return spring; 300, fixing mechanism; 310, mounting rod; 311, connecting rod; 312, limiting block; 313, positioning block; 314, No. 1 return spring. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in 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.

[0019] See also Figure 1-Figure 10 As shown, the present embodiment provides a two-gas shielded roller welding machine and a welding process, including a machine body 100, on which a protection mechanism 200 for protection during welding is provided to prevent arc light and splashes generated during welding from causing harm to the human body. The protection mechanism 200 adjusts the protection angle of the protection mechanism 200 according to different welding operations. When the protection mechanism 200 rotates to a horizontal state, it is convenient to clean the protection surface of the protection mechanism 200. The protection mechanism 200 rotates into a ladder shape for storage, and at the same time covers the top of the welder to protect the welder, thereby preventing damage to the welder caused by accidental collision to a certain extent. The protection mechanism 200 is provided with a fixing mechanism 300 for limiting the position after the angle of the protection mechanism 200 is adjusted, thereby ensuring the stability of the protection mechanism 200 after the angle is adjusted.

[0020] The present invention takes into account that most of the existing protective plates have fixed sizes, while the diameters of rollers vary. When welding a roller with a larger diameter, the protective plate may not be able to completely cover the welding area, so that the arc light, spatter, etc. generated by the welding can escape from the gap between the protective plate and the roller, thereby reducing the actual protective effect of the protective plate; therefore, a protective mechanism 200 is provided, and the angle of the protective mechanism 200 is manually adjusted to achieve the adjustment of the bending angle of the protective mechanism 200 according to the size of the roller diameter, so as to better shield the outside of the rollers with different diameters, thereby effectively blocking the arc light and spatter.

[0021] It is also considered that when the body 100 is not in use, the protective mechanism 200 is rotated into a trapezoidal shape, which effectively prevents the protective mechanism 200 from extending vertically and occupying too much unnecessary space when the device is not in use. Moreover, when the protective mechanism 200 is in a trapezoidal shape, it covers the top of the welder, which to a certain extent provides all-round protection for the welder.

[0022] In addition, when the protective mechanism 200 needs to be cleaned, the protective mechanism 200 is rotated to a horizontal state, so that the protective mechanism 200 does not need to be disassembled. The protective mechanism 200 can be flipped 180 degrees to clean the protective surface of the protective mechanism 200, thereby improving the convenience of the device.

[0023] In order to block the arc light, spatter, etc. generated during welding, such as Figure 2-Figure 3 As shown, the specific structure of the protection mechanism 200 is further disclosed. The protection mechanism 200 at least includes a fixed plate 210 slidably connected to the body 100, and a multi-segment protection plate 220 is rotatably connected to the fixed plate 210. During welding, the multi-segment protection plate 220 can block arc light and splashes to avoid harm to the operator, and the bending angle of the multi-segment protection plate 220 can be adjusted by rotating the multi-segment protection plate 220.

[0024] like Fig. 9 As shown, the bending angle of the multi-segment protective plate 220 can be adjusted according to the size of different roller diameters, so that the multi-segment protective plate 220 can rotate from the a1 state to the a2 state, so that the multi-segment protective plate 220 can better cover the contours of rollers with different diameters, thereby effectively blocking arc light and splashes.

[0025] like Fig.10 As shown, when the equipment is not in use, the multi-segment protective plate 220 can be rotated to a trapezoidal shape, which not only changes the vertical extension of the multi-segment protective plate 220, avoiding the multi-segment protective plate 220 from extending vertically and occupying too much unnecessary space when the equipment is not in use, but also the multi-segment protective plate 220 is in a trapezoidal shape, covering the top of the welder, which can provide all-round protection for the welder to a certain extent.

[0026] like Fig. 9 As shown, when the multi-segment protective plate 220 needs to be cleaned, the multi-segment protective plate 220 is rotated to the a3 state. There is no need to remove the multi-segment protective plate 220 from the body 100. The multi-segment protective plate 220 can be flipped 180 degrees to clean the protective surface of the multi-segment protective plate 220, thereby improving the cleaning efficiency.

[0027] After the angle of the multi-segment protection plate 220 is adjusted, the multi-segment protection plate 220 needs to be fixed. Figure 2-Figure 3 As shown, the specific structure of the fixing mechanism 300 is further disclosed. The fixing mechanism 300 at least includes a mounting rod 310 fixedly connected to the fixing plate 210, two connecting rods 311 are fixedly connected on both sides of the multi-section protective plate 220, and the two connecting rods 311 are rotatably connected to both sides of the mounting rod 310, one side of the mounting rod 310 is fixedly connected to a plurality of limit blocks 312, and the side of the connecting rod 311 close to the limit block 312 is fixedly connected to a plurality of positioning blocks 313.

[0028] When the angle of the multi-segment protective plate 220 needs to be adjusted, the multi-segment protective plate 220 is manually pushed to drive the connecting rod 311 to slide inside the mounting rod 310, thereby driving the positioning block 313 to slide, so that the positioning block 313 and the limit block 312 are disengaged, and then the multi-segment protective plate 220 is rotated to drive the connecting rod 311 to rotate, thereby driving the positioning block 313 to rotate, so as to adjust the angle of the multi-segment protective plate 220.

[0029] After the angle adjustment of the multi-segment protective plate 220 is completed, the multi-segment protective plate 220 is manually pulled to drive the connecting rod 311 to reset and move, thereby driving the positioning block 313 to be re-engaged in the limit block 312, ensuring the stability of the multi-segment protective plate 220 during welding.

[0030] In order to improve the stability of the clamping connection between the limit block 312 and the positioning block 313, as shown in FIG. Figure 3 As shown, the inner walls on both sides of the mounting rod 310 are rotatably connected to a No. 1 return spring 314, and the No. 1 return spring 314 is fixedly connected to the adjacent connecting rod 311 on the side away from the mounting rod 310. When the multi-segment protective plate 220 is manually pressed to adjust the angle, the No. 1 return spring 314 is in a compressed state. After the angle adjustment of the multi-segment protective plate 220 is completed, the multi-segment protective plate 220 is manually released, and the connecting rod 311 is driven to reset and move under the force of the No. 1 return spring 314 to restore the deformation. The No. 1 return spring 314 can apply a continuous force to the connecting rod 311. This force can make the limit block 312 and the positioning block 313 more tightly clamped, thereby improving the stability of the clamping between the limit block 312 and the positioning block 313.

[0031] In order to better prevent the splashing slag, Figure 4 As shown, the fixing mechanism 300 is provided with a plurality of groups, and the multi-section protection plate 220 is composed of a plurality of baffles, and the adjacent baffles are connected by the fixing mechanism 300. According to the welding conditions, a baffle can be flexibly adjusted to rotate, so as to better block the splashing slag and arc light.

[0032] In order to adjust the length of the multi-segment protection plate 220 to further increase the protection range of the multi-segment protection plate 220, as shown in FIG. Figure 7-Figure 8 As shown, the inner wall of the multi-segment protective plate 220 is slidably connected with a movable plate 230, and a plurality of limiting holes are opened on one side of the movable plate 230. According to different length protection requirements, the movable plate 230 is pulled out from the inside of the multi-segment protective plate 220 to adjust the protection length of the multi-segment protective plate 220, thereby further improving the protection range of the multi-segment protective plate 220.

[0033] After the movable plate 230 is pulled out from the multi-segment protection plate 220, the movable plate 230 needs to be fixed. Figure 7-Figure 8As shown, a circular hole is opened on one side of the multi-segment protective plate 220, and a T-shaped rod 231 is slidably connected in the circular hole. The T-shaped rod 231 passes through the circular hole and is inserted into the limiting hole of the movable plate 230. A No. 2 return spring 232 is fixedly connected to the outer wall of the multi-segment protective plate 220, and the No. 2 return spring 232 is fixedly connected to the outer wall of the T-shaped rod 231 on the side away from the multi-segment protective plate 220. The T-shaped rod 231 is manually pulled to pull the T-shaped rod 231 out of the limiting hole of the movable plate 230. At this time, the No. 2 return spring 232 is released. The movable plate 230 is deformed, and then the handle installed on the movable plate 230 is manually pulled to pull the movable plate 230 out from the inside of the multi-segment protective plate 220, and the length of the movable plate 230 is adjusted. After the adjustment is completed, the T-bar 231 is manually loosened, and under the force of the second reset spring 232 to restore the deformation, the T-bar 231 is driven to be re-engaged in the limiting hole of the movable plate 230, so as to fix the movable plate 230 and the multi-segment protective plate 220, so as to avoid accidentally touching the movable plate 230 during welding, which causes the movable plate 230 to slide.

[0034] During welding, the welding area is different, and the position of the multi-segment protection plate 220 is adjusted to avoid excessive shielding of the welding position by the multi-segment protection plate 220, so that the operator can better observe the welding situation, such as Figure 4-Figure 6 As shown, a slide groove is provided on one side of the body 100 close to the fixed plate 210, and blocks 110 are arrayed in the slide groove. A slider 211 is fixedly connected to one side of the fixed plate 210 close to the slide groove, and the slider 211 is slidably connected to the slide groove. A through hole is provided on the fixed plate 210, and the through hole passes through the slider 211. A limiting rod 212 is slidably connected in the through hole, and the limiting rod 212 extends into the inside of the slide groove. The limiting rod 212 is located on one side of the slide groove and is fixedly connected with a support block 213, and the support block 213 is snapped into the gap between the two blocks 110. A No. 3 return spring 214 is fixedly connected to the side of the support block 213 away from the body 100, and the No. 3 return spring 214 is fixedly connected to the inner wall of the fixed plate 210 on the side away from the support block 213.

[0035] When the position of the fixed plate 210 needs to be adjusted, the limit rod 212 is manually pulled to drive the support block 213 to move. At this time, the No. 3 return spring 214 is deformed, and the limit rod 212 is pulled to drive the support block 213 to move out of the gap between the two adjacent blocks 110. Then the fixed plate 210 is manually pushed to drive the slider 211 to slide in the slide groove of the body 100. After adjusting the position of the fixed plate 210, the limit rod 212 is manually released. Under the force of the No. 3 return spring 214 to restore the deformation, the limit rod 212 is driven to reset and move, thereby driving the support block 213 to reset and move, so that the support block 213 is re-clamped between the two blocks 110, thereby fixing the fixed plate 210 and the body 100, avoiding accidental touching of the fixed plate 210 during welding, causing it to slide accidentally.

[0036] Working principle: By manually pushing the multi-segment protective plate 220, the No. 1 return spring 314 is compressed, and the multi-segment protective plate 220 slides to drive the connecting rod 311 to slide inside the mounting rod 310. The sliding of the mounting rod 310 drives the positioning block 313 to slide, so that the positioning block 313 and the limit block 312 are disengaged. Then the multi-segment protective plate 220 is rotated to drive the connecting rod 311 to rotate, thereby driving the positioning block 313 to rotate. After adjusting the angle of the multi-segment protective plate 220, the multi-segment protective plate 220 is manually released. Under the force of the No. 1 return spring 314 to restore the deformation, the connecting rod 311 is driven to reset and move, thereby driving the positioning block 313 to be clamped into the limit block 312, thereby ensuring the stability of the multi-segment protective plate 220 during welding.

[0037] When welding is not required, the multi-segment protective plate 220 can be rotated to a trapezoidal shape. Compared with the vertical state of the multi-segment protective plate 220, the multi-segment protective plate 220 is in a trapezoidal shape, which not only changes the vertical extension of the multi-segment protective plate 220 and avoids the multi-segment protective plate 220 extending vertically to occupy too much unnecessary space, but also the multi-segment protective plate 220 is in a trapezoidal shape and covers the top of the welder, which can provide all-round protection for the welder to a certain extent.

[0038] When the multi-segment protective plate 220 needs to be cleaned, the multi-segment protective plate 220 can be rotated to a horizontal state without removing the multi-segment protective plate 220 from the body 100. The multi-segment protective plate 220 can be flipped 180 degrees to clean the protective surface of the multi-segment protective plate 220, thereby improving the cleaning efficiency.

[0039] The second object of the present invention is to provide a two-gas shielded roller shaft welding process, which is applied to any one of the two-gas shielded roller shaft welding machines mentioned above, and comprises the following steps: Step 1: During welding, manually press the protection mechanism 200 to drive the protection mechanism 200 to move elastically so that the fixing mechanism 300 does not limit the protection mechanism 200, and then manually rotate the protection mechanism 200 to adjust the angle of the protection mechanism 200; Step 2: After the angle adjustment of the protection mechanism 200 is completed, the protection mechanism 200 is manually released, and the protection mechanism 200 is elastically moved to engage with the fixing mechanism 300.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A two-gas shielded roller welding machine, comprising a machine body (100), characterized in that: The body (100) is provided with a protection mechanism (200) for protection during welding. The protection mechanism (200) adjusts the protection angle of the protection mechanism (200) according to different welding operations. When the protection mechanism (200) is rotated to a horizontal state, it is convenient to clean the protection surface of the protection mechanism (200). The protection mechanism (200) is rotated into a ladder shape for storage, and at the same time covers the top of the welder to protect the welder. The protection mechanism (200) is provided with a fixing mechanism (300) for limiting the position after the protection mechanism (200) is adjusted in angle.

2. The two-gas shielded roller welding machine according to claim 1, characterized in that: The protection mechanism (200) comprises at least a fixing plate (210) slidably connected to the machine body (100), and a plurality of protection plates (220) are rotatably connected to the fixing plate (210).

3. The two-gas shielded roller welding machine according to claim 2 is characterized in that: The fixing mechanism (300) comprises at least a mounting rod (310) fixedly connected to a fixing plate (210); two connecting rods (311) are respectively fixedly connected to two sides of the multi-segment protection plate (220); and the two connecting rods (311) are respectively rotatably connected to two sides of the mounting rod (310); a plurality of limit blocks (312) are fixedly connected to one side of the mounting rod (310); and a plurality of positioning blocks (313) are fixedly connected to one side of the connecting rod (311) close to the limit blocks (312).

4. The two-gas shielded roller welding machine according to claim 3 is characterized in that: The inner walls on both sides of the installation rod (310) are rotatably connected to a No. 1 return spring (314), and the side of the No. 1 return spring (314) away from the installation rod (310) is fixedly connected to an adjacent connection rod (311).

5. The two-gas shielded roller welding machine according to claim 3 is characterized in that: A total of multiple groups of the fixing mechanisms (300) are provided, and the multi-section protection plate (220) is composed of multiple baffles, and two adjacent baffles are connected via the fixing mechanisms (300).

6. The two-gas shielded roller welding machine according to claim 2, characterized in that: The inner wall of the multi-segment protection plate (220) is slidably connected to a movable plate (230), and a plurality of limiting holes are formed on one side of the movable plate (230).

7. The dual-gas shielded roller welding machine according to claim 6, characterized in that: A circular hole is provided on one side of the multi-segment protective plate (220), a T-shaped rod (231) is slidably connected in the circular hole, the T-shaped rod (231) passes through the circular hole and is inserted into the limiting hole of the movable plate (230), a No. 2 return spring (232) is fixedly connected to the outer wall of the multi-segment protective plate (220), and the side of the No. 2 return spring (232) away from the multi-segment protective plate (220) is fixedly connected to the outer wall of the T-shaped rod (231).

8. The dual-gas shielded roller welding machine according to claim 2, characterized in that: A slide groove is provided on one side of the machine body (100) close to the fixed plate (210), and blocks (110) are arranged in the slide groove. A slider (211) is fixedly connected to one side of the fixed plate (210) close to the slide groove, and the slider (211) is slidably connected to the slide groove. A through hole is provided on the fixed plate (210), and the through hole passes through the slider (211). A limit rod (212) is slidably connected in the through hole, and the limit rod (212) extends into the inside of the slide groove. A support block (213) is fixedly connected to one side of the limit rod (212) located on the slide groove, and the support block (213) is snapped into the gap between the two blocks (110). A No. 3 return spring (214) is fixedly connected to one side of the support block (213) away from the machine body (100), and a No. 3 return spring (214) is fixedly connected to the inner wall of the fixed plate (210) on one side away from the support block (213).

9. A two-gas shielded roller shaft welding process, applied to the two-gas shielded roller shaft welding machine according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: During welding, the protection mechanism (200) is manually pressed to drive the protection mechanism (200) to move elastically so that the fixing mechanism (300) does not limit the protection mechanism (200), and then the protection mechanism (200) is manually rotated to adjust the angle of the protection mechanism (200); Step 2: After the angle adjustment of the protection mechanism (200) is completed, the protection mechanism (200) is manually released, and the protection mechanism (200) is elastically moved to engage with the fixing mechanism (300).

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