CN117862874A - Sheet metal part straight seam welding and polishing device and method - Google Patents

Abstract

The utility model discloses a sheet metal part straight seam welding and polishing device and a method thereof, which belong to the technical field of sheet metal part processing, and comprise a processing box which is a main body of the sheet metal part straight seam welding and polishing device; a visual protective frame for preventing dust and debris from sputtering is arranged in the middle of the interior of the processing box; a translation mechanism for moving the visual protective frame is arranged above the visual protective frame; two sides of the visual protective frame are provided with limiting mechanisms for positioning during sheet metal part processing. According to the utility model, the visual protective frame and the visual telescopic frame are arranged, and the visual protective frame is covered on the sheet metal part and can be used for intercepting smoke dust and fragments generated by welding and polishing the sheet metal part, so that the sheet metal part is prevented from drifting and causing abrasion and influence on other parts of equipment; through setting up stop gear, let down limiting plate to two sheet metal component centre gripping spacing through damping spring holder elasticity, it is spacing still sustainable to sheet metal component centre gripping when visual protection frame removes to reduce the time and the loaded down with trivial details nature of adjustment processing position.

Description

A sheet metal straight seam welding and grinding device and method

Technical Field

The invention belongs to the technical field of sheet metal processing, and in particular relates to a sheet metal straight seam welding and grinding device and a method thereof.

Background technique

Sheet metal is a comprehensive cold processing technology for thin metal plates, including shearing, punching/cutting/combining, folding, welding, riveting, splicing, forming, etc. Its most notable feature is that the thickness of the same part is consistent. The products processed by sheet metal technology are called sheet metal parts. The sheet metal parts referred to in different industries are generally different, and are mostly used as the name for assembly.

According to patent number CN216542588U, a surface grinding device for welding sheet metal parts includes a base, a shell is fixedly installed on the top of the base, a feed trough is opened on the front and rear sides of the shell, a guide assembly is fixedly installed in the inner cavity of the shell and at the corresponding position of the feed trough, the inner side of the guide assembly is rollingly connected with the sheet metal body, grinding assemblies are fixedly installed on both sides of the top of the inner cavity of the shell, a waste cleaning assembly is fixedly installed on the back of the shell, a waste collecting assembly is slidably connected on the top of the base and in the inner cavity of the shell, and the grinding assembly includes motors fixedly installed on both sides of the top of the inner cavity of the shell; the utility model can grind both sides of the sheet metal body at the same time through the setting of the grinding assembly to treat the rust on its surface, thereby improving the welding effect, and the edge of the sheet metal body can be covered through the setting of the grinding trough to improve the grinding effect.

In the process of implementing the present invention, the applicant found that at least the following defects were exposed during use:

1. During the welding and grinding process of sheet metal parts, a large amount of smoke and powder will be generated. These waste materials are easy to drift and splash onto other parts of the equipment, causing wear and possibly affecting the normal operation of the equipment.

2. If the processing position of the sheet metal needs to be adjusted, the operator must first loosen the sheet metal, adjust the position, and then fix it. This step is relatively cumbersome and time-consuming. Since it takes a long time to adjust the processing position, the efficiency of the entire processing process will be affected. Especially in mass production, frequent adjustments to the processing position will lead to reduced production efficiency and increased production time and cost.

Summary of the invention

The object of the present invention is to provide a sheet metal straight seam welding and grinding device and method thereof, so as to solve the problem of sheet metal straight seam welding and grinding proposed in the above background technology.

To achieve the above object, the present invention provides the following technical solutions:

A sheet metal straight seam welding and grinding device, comprising:

The processing box is the main body of the sheet metal straight seam welding and grinding device;

A chip leakage net is fixedly arranged at the lower part of the processing box;

Two sheet metal parts to be welded and polished are placed on the top of the chip leakage net;

A visible protective frame is provided in the middle of the processing box to prevent the splashing of smoke and debris;

A translation mechanism for moving the visible guard frame is provided above the visible guard frame;

The two sides of the visible guard frame are provided with limiting mechanisms for positioning the sheet metal parts during processing;

A welding and grinding mechanism for processing sheet metal parts is arranged inside the visible guard frame.

Preferably, two visible telescopic frames are slidably provided at the bottom of the visible guard frame, and the two visible telescopic frames and the visible guard frame are slidably matched with each other.

Preferably, the translation mechanism further comprises a first motor installed above one side of the processing box;

The output end of the first motor is connected to a screw rod penetrating into the interior of the processing box;

The outer surface of the screw rod is sleeved with a moving frame.

Preferably, the interior of the movable frame is threadedly connected to the lead screw, the top of the movable frame is slidably connected to the inner wall of the processing box, and the bottom of the movable frame is provided with a main electric push rod connected to the visible guard frame.

Preferably, the limiting mechanism further comprises an upper fixing plate fixedly arranged above both sides of the visible guard frame and a lower limiting plate below both sides of the visible guard frame;

A damping spring seat is fixedly arranged between the upper fixing plate and the lower limiting plate;

Ball bearings are evenly arranged on the bottom of the lower limit plate.

Preferably, the ball bearings are made of high temperature resistant rubber, and the lower limit plate is fitted to the sheet metal part through the ball bearings.

Preferably, the welding and grinding mechanism further comprises two electric push rods installed on the upper part of the visible guard frame;

An electric welding gun is installed at the bottom end of one of the electric push rods;

The bottom end of the other electric push rod is connected to a second motor via a mounting plate;

A grinding head is installed at the output end of the second motor.

Preferably, an inspection door is hinged on the outer surface of the processing box, and an operation panel electrically connected to other electrical structures in the processing box is installed on one side of the processing box.

A straight seam welding and grinding method for sheet metal parts comprises the following steps:

S1: First, place two sheet metal parts to be welded and polished on the chip net, and make sure that the two sheet metal parts to be welded and polished are just under the welding gun and the polishing head;

S2: Then the main electric push rod in the translation mechanism moves to push the visible guard frame downward, so that the lower limit plate in the limit mechanism rests on the two sheet metal parts. As the main electric push rod continues to push, the damping spring seat in the limit mechanism can be squeezed, and the visible telescopic frame on the visible guard frame can be contracted, so that the lower limit plate can clamp and limit the two sheet metal parts through the elastic force of the damping spring seat;

S3: Then the two electric push rods run to push the electric welding gun and the grinding head on the second motor close to the sheet metal part, and straight seam welding is performed by the electric welding gun and grinding is performed by the grinding head;

S4: The first motor in the translation mechanism can be operated to drive the moving frame to translate along the inner wall of the processing box through the screw rod, so that the visible guard frame and the welding gun and the grinding head therein can translate at the straight seam welding position of the sheet metal part. When the visible guard frame translates, the lower limit plate fits with the sheet metal part through the ball bearing, so that the visible guard frame can continue to clamp and limit the sheet metal part when it moves, so that the sheet metal part can continue to be processed;

S5: Welding and grinding are carried out simultaneously, and the smoke and debris generated will be intercepted by the visible guard frame to prevent them from causing harm;

S6: Finally, open the inspection door to replace sheet metal parts and clean and maintain the processing box.

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

By setting up a visible guard frame and a visible telescopic frame, the operation of the main electric push rod in the translation mechanism can push the visible guard frame downward, so that the visible guard frame covers the sheet metal part, and then when the main electric push rod continues to push, the visible telescopic frame can be retracted in the visible guard frame, so as to continuously protect the sheet metal part. The visible guard frame can be used to intercept smoke and debris generated by welding and grinding of sheet metal parts, prevent them from drifting and causing wear and impact on other parts of the equipment, so as to keep the equipment clean and reduce the frequency of maintenance and cleaning work, thereby improving the normal operation efficiency of the equipment;

By setting a limit mechanism, the operation of the main electric push rod in the translation mechanism can push the visible guard frame to move downward, so that the lower limit plate in the limit mechanism can be against the two sheet metal parts. As the main electric push rod continues to push, the damping spring seat in the limit mechanism can be squeezed, so that the lower limit plate can clamp and limit the two sheet metal parts through the elastic force of the damping spring seat, and the first motor in the translation mechanism can be operated to drive the moving frame to translate along the inner wall of the processing box through the screw rod, so that the visible guard frame and the electric welding gun and grinding head therein can translate at the straight seam welding position of the sheet metal part, and when the visible guard frame translates, the lower limit plate fits with the sheet metal part through the ball bearing, so that the visible guard frame can continue to clamp and limit the sheet metal part when it moves, so that the sheet metal part can keep being processed, thereby reducing the time and tediousness of adjusting the processing position, and through the simultaneous welding and grinding, the production efficiency reduction caused by frequent adjustment of the processing position can be reduced, thereby improving the efficiency of the entire processing process.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the overall structure of the present invention;

FIG2 is a schematic diagram of the internal structure of a processing box of the present invention;

FIG3 is a schematic structural diagram of a visible guard frame of the present invention;

FIG4 is an enlarged view of point A in FIG2 of the present invention;

FIG. 5 is an enlarged view of point B in FIG. 2 of the present invention.

In the figure: 1. Processing box; 2. Visible guard frame; 201. Visible telescopic frame; 3. Translation mechanism; 301. First motor; 302. Screw rod; 303. Moving frame; 304. Main electric push rod; 4. Limiting mechanism; 401. Upper fixed plate; 402. Lower limiting plate; 403. Damping spring seat; 404. Ball bearing; 5. Chip leakage net; 6. Sheet metal; 7. Welding and grinding mechanism; 701. Supporting electric push rod; 702. Electric welding gun; 703. Second motor; 704. Grinding head; 8. Inspection door; 9. Operation panel.

Detailed ways

The present invention will be further described below in conjunction with the embodiments.

The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

Please refer to Figures 1-5. The present invention provides a sheet metal straight seam welding and grinding device, including: a processing box 1 as a main structure, used to accommodate and support other components and provide an operating space, the processing box 1 adopts a rectangular box structure, and a chip leakage net 5 for carrying a sheet metal part 6 is arranged inside, the chip leakage net 5 can filter the debris after the sheet metal part 6 is processed, so that the debris is concentrated at the bottom of the processing box 1, the sheet metal part 6 to be welded and ground is placed on the top of the chip leakage net 5, ready for welding and grinding, a visual guard frame 2 is used to observe and protect the welding process, and a movable visual guard frame 2 is arranged above The processing box 1 is provided with a translation mechanism 3 for moving the sheet metal part 6 to the desired position so as to weld and grind the sheet metal part 6. Limiting mechanisms 4 are arranged on both sides for ensuring the accurate positioning of the sheet metal part 6 during the processing to prevent deviation or shaking. A welding and grinding mechanism 7 for welding and grinding the sheet metal part 6 is arranged inside. The inspection door 8 is a door hinged on the outer surface of the processing box 1, which is used for maintaining and cleaning the inside of the device and facilitating operations such as replacing the sheet metal part 6. An operation panel 9 is installed on one side of the processing box 1, which is used to control and monitor the operating status of other electrical structures in the processing box 1, including operation switches, display screens, etc.

In this embodiment: the visual guard frame 2 is made of transparent or translucent material, such as tempered glass or high temperature resistant plastic, so that the operator can clearly observe the welding and grinding process, but can effectively prevent the splashing of smoke and debris. The visual telescopic frame 201 is a telescopic structure to ensure that it can completely cover the welding part of the sheet metal part 6 and provide sufficient protection. The visual telescopic frame 201 can slide and shrink in the visible guard frame 2 after being subjected to force.

The effects of the above structures working together are as follows:

The main electric push rod 304 pushes the visible guard frame 2 downward to cover the sheet metal part 6 through the control of the translation mechanism 3. At the same time, the visible telescopic frame 201 is slidably set at the bottom of the visible guard frame 2. As the main electric push rod 304 continues to push, it can shrink in the visible guard frame 2, thereby continuously protecting the sheet metal part 6 around to ensure that smoke and debris will not float and affect other parts of the equipment. Such a design can reduce the frequency of maintenance and cleaning work, improve the normal operating efficiency of the equipment, and keep the equipment clean. Through this design, it is possible to effectively prevent the splashing of smoke and debris, protect other parts of the equipment from being affected, reduce the frequency of maintenance and cleaning work, and thus improve the operating efficiency of the equipment.

In this embodiment: the translation mechanism 3 plays an important role in the described equipment, and its main function is to enable the visible guard frame 2 and the welding gun 702 and the grinding head 704 therein to translate at the straight seam welding position of the sheet metal part 6. The first motor 301 is installed on the upper side of the processing box 1 through a bracket or a fixed seat to ensure its stability and reliability. The screw rod 302 is a cylinder with uniform diameter and a threaded structure on the surface. The screw rod 302 penetrates into the interior of the processing box 1 and is fixed by a bearing to ensure that it can rotate smoothly and transmit kinetic force. The movable frame 303 is a frame structure with a threaded hole, which is threadedly connected to the screw rod 302 inside and slidably connected to the inner wall of the processing box 1 at the top. The main electric push rod 304 is fixed to the movable frame 303 through a bracket or a fixed seat.

The effects of these structures working together are as follows:

The first motor 301 provides power and converts the motion into linear translation motion through the screw rod 302, which drives the moving frame 303 to translate along the inner wall of the processing box 1, and controls the horizontal movement of the visible guard frame 2 and the tools inside it;

Screw rod 302 and moving frame 303: Screw rod 302 is connected to first motor 301, and its thread is connected to the inner thread of moving frame 303. When first motor 301 is running, the rotational motion of screw rod 302 will be converted into linear translational motion of moving frame 303. Moving frame 303 is connected to the inner wall of processing box 1 by sliding to ensure smooth motion.

The main electric push rod 304 is installed at the bottom of the moving frame 303 and connected to the visible guard frame 2. When the main electric push rod 304 is running, it pushes the visible guard frame 2 to move downward, so as to ensure the contact between the visible guard frame 2 and the sheet metal part 6 and maintain the stability and safety of the welding and grinding process;

Through the coordinated action of the translation mechanism 3, the visible guard frame 2 and the electric welding gun 702 and grinding head 704 therein can be translated at the straight seam welding position of the sheet metal part 6, so that the operator can more easily and accurately locate the welding position and achieve high-quality welding and grinding operations.

In this embodiment: the role of the limiting mechanism 4 is to control the moving range of the visible guard frame 2 and limit it to perform processing operations at a specific position. The upper fixing plate 401 and the lower limiting plate 402: the shape of these two plates is a rectangular plane shape to ensure that they can be effectively fixed above and below the two sides of the visible guard frame 2. They are installed by bolts, welding or other fixing devices to firmly fix them in the position of the visible guard frame 2. Their role is to ensure that an appropriate limiting force is applied to the sheet metal part 6 during operation, so as to maintain the stability of the processing position. The damping spring seat 403 is cylindrical and is used to accommodate the damping spring and provide For support, they are usually fixed between the upper fixing plate 401 and the lower limit plate 402 by bolts or welding. The function of the damping spring seat 403 is to provide the required damping force through the compression and release of the spring during operation to ensure the clamping force and stability of the lower limit plate 402 on the sheet metal 6. The ball 404 is spherical and made of high temperature resistant rubber. It is evenly arranged on the bottom of the lower limit plate 402. They fit with the sheet metal 6 to provide clamping and limiting of the sheet metal when the visible guard frame 2 moves. The function of the ball 404 is to reduce friction, so that the movement of the visible guard frame 2 is smoother and provide necessary support.

These structures work together to achieve the following effects:

The damping spring seat 403 is located between the upper fixing plate 401 and the lower limiting plate 402, and provides damping force through the compression and release of the spring. When the visible guard frame 2 contracts to make the upper fixing plate 401 move toward the lower limiting plate 402, the spring of the damping spring seat 403 will be compressed or released. When the lower limiting plate 402 reaches the two sheet metal parts 6, the elastic force of the damping spring seat 403 can allow the lower limiting plate 402 to clamp and limit the sheet metal parts 6, maintain the stability of the processing position, ensure that the processing operation is carried out at the predetermined position, and provide a stable limiting force to improve the efficiency and accuracy of the processing process. The setting of the ball 404 reduces friction, makes the movement of the visible guard frame 2 smoother, and provides necessary support to keep the processing position of the sheet metal part 6 stable.

Through such a design, the visible guard frame 2 can be translated in the straight seam welding position, while maintaining the clamping limit of the sheet metal part 6, ensuring the stability of the processing position, and improving production efficiency and the efficiency of the entire processing process.

In this embodiment: the function of the welding and grinding mechanism 7 is to grind the sheet metal during the welding process. The supporting electric push rod 701 adopts the form of a linear push rod, and the driving force is provided by the electric control system, so that the electric welding gun 702 and the grinding head 704 on the second motor 703 can be accurately moved in the vertical direction to ensure the accuracy of welding and grinding. The electric welding gun 702 adopts a common electric welding gun. Through the push of the supporting electric push rod 701, the electric welding gun 702 can perform straight seam welding on the sheet metal 6. Such a setting can realize the automation of welding operations, and since the welding process occurs inside the visible guard frame 2, the generated welding smoke can be effectively prevented from causing harm to the operator. The second motor 703 can be a motor device for driving the grinding head 704. The grinding head 704 is made of a grindstone. Through the push of the supporting electric push rod 701, the grinding head 704 can be close to the surface of the sheet metal 6 for grinding operations.

The effects of these structures working together are as follows:

Straight seam welding: The electric push rod 701 pushes the welding gun 702 installed at the bottom to achieve straight seam welding of the sheet metal 6. Straight seam welding is a welding method that connects two sheet metals along their edges. Through the operation of the welding gun 702, precise control of the welding seam can be achieved;

Grinding: Another electric push rod 701 pushes a grinding head 704 connected to a second motor 703 to achieve grinding of the weld joint. The grinding head 704 is used to remove unevenness, burrs, etc. on the weld joint. Grinding can make the weld joint smoother and improve the welding quality and appearance.

Through the operation of the welding and grinding mechanism 7, welding and grinding can be performed simultaneously to improve production efficiency. Through the cooperation of these components, automated operations of welding and grinding can be achieved to improve work efficiency and product quality.

A straight seam welding and grinding method for sheet metal parts comprises the following steps:

S1: First, two sheet metal parts 6 to be welded and polished are placed on the chip leakage net 5, and the two sheet metal parts 6 to be welded and polished are placed just below the electric welding gun 702 and the polishing head 704;

S2: After that, the main electric push rod 304 in the translation mechanism 3 operates to push the visible guard frame 2 downward, so that the lower limit plate 402 in the limit mechanism 4 abuts against the two sheet metal parts 6. As the main electric push rod 304 continues to push, the damping spring seat 403 in the limit mechanism 4 can be squeezed, and the visible telescopic frame 201 on the visible guard frame 2 can be contracted, so that the lower limit plate 402 can clamp and limit the two sheet metal parts 6 through the elastic force of the damping spring seat 403;

S3: Then the two electric push rods 701 are operated to push the electric welding gun 702 and the grinding head 704 on the second motor 703 close to the sheet metal part 6, and straight seam welding is performed by the electric welding gun 702 and grinding is performed by the grinding head 704;

S4: The first motor 301 in the translation mechanism 3 can be operated, and the moving frame 303 can be driven to translate along the inner wall of the processing box 1 through the screw rod 302, so that the visible guard frame 2 and the welding gun 702 and the grinding head 704 therein can translate at the straight seam welding position of the sheet metal part 6. When the visible guard frame 2 translates, the lower limit plate 402 fits with the sheet metal part 6 through the ball 404, so that the visible guard frame 2 can continue to clamp and limit the sheet metal part 6 when it moves, so that the sheet metal part 6 can keep being processed;

S5: welding and grinding are performed simultaneously, and the smoke and debris generated will be intercepted by the visual guard frame 2 to prevent them from causing harm;

S6: Finally, the inspection door 8 is opened to replace the sheet metal part 6, and the processing box 1 can also be cleaned and maintained.

In this implementation scheme: the control circuits of the operation panel 9, the first motor 301, the main electric push rod 304, the supporting electric push rod 701, the welding gun 702 and the second motor 703 can be realized by simple programming by technicians in this field. It belongs to the common knowledge in this field and is only used without modification. Therefore, the control method and circuit connection will not be described in detail.

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 (9)

1. A sheet metal straight seam welding and grinding device, characterized by comprising: The processing box (1) is the main body of the sheet metal straight seam welding and grinding device; A chip leakage net (5) is fixedly arranged at the lower part of the processing box (1); Two sheet metal parts (6) to be welded and polished are placed on the top of the chip leakage net (5); A visible protective frame (2) is provided in the middle of the processing box (1) for preventing the splashing of smoke and debris; A translation mechanism (3) for moving the visible guard frame (2) is arranged above the visible guard frame (2); Limiting mechanisms (4) for positioning the sheet metal part (6) during processing are arranged on both sides of the visible guard frame (2); A welding and grinding mechanism (7) for processing the sheet metal part (6) is arranged inside the visible protection frame (2). 2. The sheet metal straight seam welding and grinding device according to claim 1 is characterized in that two visible telescopic frames (201) are slidably provided at the bottom of the visible guard frame (2), and the two visible telescopic frames (201) and the visible guard frame (2) are slidably matched with each other. 3. The sheet metal straight seam welding and grinding device according to claim 1, characterized in that the translation mechanism (3) further comprises a first motor (301) installed above one side of the processing box (1); The output end of the first motor (301) is connected to a screw rod (302) that penetrates into the interior of the processing box (1); The outer surface of the screw rod (302) is sleeved with a moving frame (303). 4. The sheet metal straight seam welding and grinding device according to claim 3 is characterized in that the interior of the movable frame (303) is threadedly connected to the screw rod (302), the top of the movable frame (303) is slidingly connected to the inner wall of the processing box (1), and the bottom of the movable frame (303) is installed with a main electric push rod (304) connected to the visible guard frame (2). 5. The sheet metal straight seam welding and grinding device according to claim 1, characterized in that the limiting mechanism (4) further comprises an upper fixing plate (401) fixedly arranged above both sides of the visible guard frame (2) and a lower limiting plate (402) below both sides of the visible guard frame (2); A damping spring seat (403) is fixedly arranged between the upper fixing plate (401) and the lower limiting plate (402); Rolling balls (404) are evenly arranged on the bottom of the lower limit plate (402). 6. The sheet metal straight seam welding and grinding device according to claim 5 is characterized in that the ball (404) is made of high temperature resistant rubber, and the lower limit plate (402) is fitted to the sheet metal (6) through the ball (404). 7. The sheet metal straight seam welding and grinding device according to claim 1, characterized in that the welding and grinding mechanism (7) further comprises two supporting electric push rods (701) installed on the upper part of the visible guard frame (2); An electric welding gun (702) is installed at the bottom end of one of the electric push rods (701); The bottom end of the other electric push rod (701) is connected to a second motor (703) via a mounting plate; A grinding head (704) is installed at the output end of the second motor (703). 8. The sheet metal straight seam welding and grinding device according to claim 1 is characterized in that an inspection door (8) is hinged on the outer surface of the processing box (1), and an operating panel (9) electrically connected to other electrical structures in the processing box (1) is installed on one side of the processing box (1). 9. A method for straight seam welding and grinding of sheet metal parts, characterized by comprising the following steps: S1: First, two sheet metal parts (6) to be welded and polished are placed on the chip leakage net (5), and the two sheet metal parts (6) to be welded and polished are placed just below the electric welding gun (702) and the polishing head (704); S2: Afterwards, the main electric push rod (304) in the translation mechanism (3) operates to push the visible guard frame (2) downward, so that the lower limit plate (402) in the limit mechanism (4) abuts against the two sheet metal parts (6). As the main electric push rod (304) continues to push, the damping spring seat (403) in the limit mechanism (4) is squeezed and the visible telescopic frame (201) on the visible guard frame (2) is contracted, so that the lower limit plate (402) can clamp and limit the two sheet metal parts (6) through the elastic force of the damping spring seat (403); S3: Then the two electric push rods (701) are operated to push the electric welding gun (702) and the grinding head (704) on the second motor (703) close to the sheet metal part (6), and straight seam welding is performed by the electric welding gun (702) and grinding is performed by the grinding head (704); S4: The first motor (301) in the translation mechanism (3) can be operated to drive the moving frame (303) to translate along the inner wall of the processing box (1) through the screw rod (302), so that the visible guard frame (2) and the electric welding gun (702) and the grinding head (704) therein can translate at the straight seam welding position of the sheet metal part (6). When the visible guard frame (2) translates, the lower limit plate (402) fits the sheet metal part (6) through the ball bearing (404), so that when the visible guard frame (2) moves, it can continue to clamp and limit the sheet metal part (6), so that the sheet metal part (6) can be processed; S5: Welding and grinding are carried out simultaneously, and the smoke and debris generated will be intercepted by the visual guard frame (2) to prevent them from causing harm; S6: Finally, the inspection door (8) is opened to replace the sheet metal part (6) and to clean and maintain the processing box (1).