Automatic welding tool and method for annular metal plate formed by splicing multiple steel plates

Abstract

The invention provides an automatic welding tool and method for an annular metal plate formed by splicing multiple steel plates. The welding tool comprises a fixed bearing assembly, a movable supporting assembly, a movable bearing assembly, a transverse limiting assembly, an interval positioning assembly, a transverse adjusting and conveying assembly, a fixed suction assembly and a movable suction assembly. The welding tool is specially developed for automobile annular metal plate tailored blank laser welding, is widely suitable for various annular metal plate welding processes aiming at an annular metal plate tailored blank laser welding process needing a set gap and an annular metal plate direct splicing process without a set gap, is high in adaptability, can be simply and quickly adjusted on the same tool, realizes two process routes, and is suitable for large-scale production. The automatic feeding tool can meet the precision requirements of two automobile annular welding processes, is easy to combine with automatic feeding, can perform feeding simultaneously, can position each group of material sheets in the tool simultaneously, has no successive action sequence, and saves time.

Description

Technical Field

[0001] The invention relates to a welding process, and in particular to an automatic welding tool and method for splicing a plurality of steel plates together into an annular sheet metal. Background Art

[0002] At present, before laser wire welding of automobile circular sheet metal, the weld needs to be set to a certain gap, and the gap is set to one of the values ​​​​of 0.1mm-2.0mm before laser wire welding process, or there is no set gap, and the laser welding process is directly performed after tightening. Due to the diversity of circular sheet metal types (4 pieces, 5 pieces, 6 pieces), irregular shapes, and closed-loop connections, the current existing circular sheet metal tooling has poor adaptability, high tooling material costs, high labor input, high labor costs, difficult to integrate automation, and extremely high investment costs.

[0003] Annular welding with set gap:

[0004] Method 1: Manually load materials in sequence, manually place a gap sheet with a set gap between the welds of two sheets, assemble them in sequence, press, and then manually press the magnet adsorption button. The tooling magnet adsorbs the positioned sheets in the order in which the buttons are pressed. Generally, 4 people are required to load materials, position, press buttons, etc. at the same time. The manual workload is huge, the labor cost is extremely high, and the circular assembly is performed in sequence. Due to the product size tolerance, tooling fixture size tolerance, and manual assembly positioning tolerance, it is very easy to cause the width of the last weld to be uneven and the size exceeds the allowable range;

[0005] Method 2 generally requires 2-3 people. After the tooling positioning mechanism is automatically opened, the workers load the materials in sequence, press the pieces, and then press the magnet adsorption button. After the pieces are completely assembled in sequence, the mechanism under the pieces automatically moves a certain distance toward the outside at a certain angle in sequence. After opening, a set gap is formed. This method has a large amount of manual loading tasks and low efficiency. It is not easy to form fully automatic tooling loading. In addition, for multiple pieces, the mechanism is extremely complex and the tooling cost is high. It still requires at least 2 people to participate.

[0006] Circular welding without set gap:

[0007] Method 3: Manually load materials in sequence, manually insert the welding seam with a positioning plate of a certain thickness, and press the material against the positioning plate and the lateral positioning pin in the set order, and then manually press the magnet adsorption button. The tooling magnet adsorbs the positioned material in the order in which the button is pressed. Generally, 4 people are required to load and position the materials at the same time, which is a huge manual task and has a very high labor cost.

[0008] Method 4, a customized suction cup rack, automatically moves to the top of the tooling fixture. Generally, the first piece of material is positioned through the pre-expended hole and adsorbed by the electromagnet. The subsequent parts are pushed tight in turn by the suction cup of the customized suction cup rack above, and then adsorbed in turn by the corresponding electromagnet below, and finally welded. Due to the cumulative error of the previous weld gap splicing, the repeated positioning error of the last weld is large, the defective rate is high, and the positioning time is long.

[0009] Therefore, it is necessary to optimize the structure of this welding tool to overcome the above-mentioned defects. Summary of the invention

[0010] The purpose of the present invention is to provide an automatic welding tool and method for splicing annular sheet metal with multiple steel plates.

[0011] The technical solution adopted by the present invention to solve the technical problem is:

[0012] An automatic welding tool for splicing multiple steel plates into annular sheet metal, comprising:

[0013] A fixed load-bearing assembly, which is provided with a plurality of parts, each of which is installed in the frame through a fixed connection structure and is adapted to the shape of the sheet metal piece, and can carry the sheet metal piece;

[0014] A movable support assembly, which is provided with a plurality of parts, each movable support assembly is installed in the frame through a movable connection structure, and can be moved in the frame, and the fixed bearing assembly and the movable support assembly are arranged in a lateral interval and enclosed to form a ring structure;

[0015] A movable bearing assembly, which is provided with a plurality of parts, each of which is installed in a movable supporting assembly and can move with the movable supporting assembly. It is adapted to the shape of the sheet metal piece, can carry the sheet metal piece, and can move with the sheet metal piece, and adjust the gap between the fixed bearing assembly and the sheet metal piece carried by the movable bearing assembly;

[0016] A transverse limit assembly, which is provided with a plurality of parts, each of which is installed in the frame through a fixed connection structure and corresponds to the position of the fixed bearing assembly and the movable support assembly. The transverse limit assembly limits the adjustment position of the movable support assembly and limits the position of the sheet metal piece on the fixed bearing assembly;

[0017] A spacing and positioning assembly, which is provided with a plurality of parts, each of which is installed in the frame through a movable connection structure and corresponds to the position of the fixed bearing assembly and the movable bearing assembly. When it enters between the adjacent fixed bearing group and or the movable bearing assembly, it can space and position the sheet metal pieces on the fixed bearing assembly or the movable bearing assembly. When it leaves between the adjacent fixed bearing assembly or the movable bearing assembly, it can form a gap between the adjacent sheet metal pieces.

[0018] A transverse transfer assembly, which is provided with a plurality of parts, each of which is installed in the frame and engaged with the movable support assembly, and can drive the movable support assembly and the movable bearing assembly to move, adjust the gap between the movable bearing assembly and the fixed bearing assembly, and adjust the gap between adjacent sheet metal pieces;

[0019] A fixed suction assembly, which is provided with a plurality of parts, each of which is fixedly installed in the frame and corresponds to the position of the fixed bearing assembly, and the fixed suction assembly is used to suction and position the sheet metal piece on the fixed bearing assembly;

[0020] The movable suction component is provided with several parts, each movable suction component is installed in the movable support component respectively, and can move with the movable support component. It corresponds to the position of the movable bearing component, and the movable suction component sucks and positions the sheet metal material on the movable bearing component.

[0021] Specifically, the fixed bearing assembly includes:

[0022] A fixed carrier is provided with at least one pair, each of which extends in the transverse direction and is installed in the frame through a fixed connection structure. There is space between the fixed carriers, and sheet metal pieces can be placed on the fixed carriers and supported by the fixed carriers.

[0023] The movable support components include:

[0024] The movable support plates are provided with at least one pair, each of which extends in the transverse direction and is arranged in front of the fixed carrier plate at intervals to form a gap between the fixed carrier plate and the movable support plates, and the height of the movable support plates is less than that of the fixed support plates.

[0025] The active bearing components include:

[0026] The movable carrier is provided with at least one pair, each movable carrier extends in the transverse direction, is installed on the top of the movable support plate, and is flush with the fixed support plate, forming a gap between the fixed support plate and the movable carrier plate, and the sheet metal piece can be placed on the movable carrier plate and supported by the movable carrier plate.

[0027] The lateral limiter assembly includes:

[0028] Inner pins, at least one pair of which are provided, each of which is fixedly mounted in the frame and located inside the movable support plate, and the inner pins are used to limit the moving range of the movable support plate;

[0029] The outer pins are provided with at least one pair, each of which is fixedly installed in the frame and located outside the fixed carrier plate, and the outer edge of the sheet on the fixed carrier plate is limited by the outer pins.

[0030] The interval positioning components include:

[0031] A group of positioning partitions are provided, each positioning partition is located in the gap between the fixed carrier and the movable carrier, and is installed in the frame through a vertical movable structure. It can move vertically in the frame. When moving upward, its height is greater than the height of the sheet metal pieces on the fixed carrier and the movable carrier, and the end of the sheet metal piece can be positioned. When moving downward, its height is less than the height of the fixed support plate and the movable support plate, and the sheet metal pieces on the movable support plate and the movable carrier can move over the positioning partition.

[0032] The lateral transfer components include:

[0033] A transverse linear rail, which is provided with at least one pair, each of which is installed in the frame and cooperates with the movable support plate. It is arranged in an oblique direction and forms an angle with the positioning partition, so that the movable support plate can move along the transverse linear rail, driving the end of the sheet metal piece on the movable carrier plate to abut against the positioning partition, and the positioning partition is used to position it;

[0034] The transferring cylinder is provided with at least one pair, each transferring cylinder is respectively installed in the frame and cooperates with the movable support plate. The movable support plate and the movable carrier plate are driven by the transferring cylinder to move along the transverse linear rail.

[0035] The fixed suction assembly includes:

[0036] The fixed magnetic blocks are provided with at least two groups, each group of fixed magnetic blocks is respectively fixedly installed in the frame and corresponds to the position of the fixed carrier plate, and the fixed magnetic blocks are used to attract and position the sheet metal pieces on the fixed carrier plate.

[0037] The active suction components include:

[0038] The movable magnetic blocks are provided with at least two groups, each group of movable magnetic blocks is respectively installed on the movable support plate and corresponds to the position of the movable carrier plate, and the sheet metal pieces on the movable carrier plate are attracted and positioned by the movable magnetic blocks.

[0039] An automatic welding method for splicing a plurality of steel plates into annular sheet metal is performed using the above-mentioned welding tool, and comprises:

[0040] Move the positioning partition upwards to separate it between the fixed carrier plate and the movable carrier plate;

[0041] The robot gripper places each sheet metal piece on the fixed carrier and the movable carrier respectively, and absorbs each sheet metal piece through its suction cup;

[0042] The robot gripper drives the sheet metal piece to move horizontally, so that its end is closely in contact with the positioning partition, and the outer edge of the sheet metal piece on the fixed carrier is closely in contact with the outer pin column;

[0043] Move the positioning partition downward to separate it from the end of the sheet metal blank;

[0044] The movable support plate is driven to move along the transverse linear track by the air cylinder, so that the movable carrier plate and the sheet metal pieces it carries move together, so that the inner edge of the movable support plate is closely abutted against the inner pin, and the gap between adjacent sheet metal pieces is within the set range;

[0045] The sheet metal pieces are attracted and positioned by fixed magnetic blocks and movable magnetic blocks respectively;

[0046] The positioned sheet metal pieces are welded by laser welding equipment.

[0047] The advantages of the present invention are:

[0048] This welding tool is specially developed for the laser welding of automobile circular sheet metal. It is aimed at the laser welding process of circular sheet metal that requires setting gaps, and the direct splicing process of circular sheet metal without setting gaps. It is widely applicable to various circular sheet metal welding processes and has strong adaptability. It can realize two process routes by simple and quick adjustment on the same tool. It can meet the precision requirements of two automobile circular welding processes. It is easy to combine with automatic loading, and the loading can be performed simultaneously. Each group of sheets inside the tool can be positioned at the same time, without any sequence of actions, thus saving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural schematic diagram of a ring-shaped sheet metal formed by splicing multiple steel plates according to the present invention;

[0050] Figure 2 It is a schematic diagram of the structure of the automatic welding tooling for splicing a plurality of steel plates into annular sheet metals proposed by the present invention;

[0051] Figure 3 This is one of the operation processes of the welding tool. In the figure, the positioning partition is in the rising state;

[0052] Figure 4 This is the second operation process of the welding tool. In the figure, the positioning partition is in a lowered state;

[0053] Figure 5This is the third operation process on the welding tool side. In the figure, the inner edge of the movable support plate is tightly against the inner pin. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0055] like Figure 2 As shown, the automatic welding tooling for splicing annular sheet metal with multiple steel plates proposed by the present invention comprises a fixed bearing assembly, a movable supporting assembly, a movable bearing assembly, a lateral limiting assembly, an interval positioning assembly, a lateral transfer assembly, a fixed suction assembly and a movable suction assembly;

[0056] The fixed bearing assembly is provided with several pieces, each of which is installed in the frame through a fixed connection structure and is adapted to the shape of the sheet metal piece, so as to bear the sheet metal piece;

[0057] The movable support assembly is provided with a plurality of parts, each movable support assembly is installed in the frame through a movable connection structure, and can be moved in the frame, and the fixed bearing assembly and the movable support assembly are arranged at intervals in the horizontal direction and enclosed to form a ring structure;

[0058] The movable bearing assembly is provided with several parts, each movable bearing assembly is installed in the movable support assembly respectively, and can move together with the movable support assembly, and is adapted to the shape of the sheet metal piece, and can carry the sheet metal piece, and move with the sheet metal piece, and adjust the gap between the sheet metal piece carried by the fixed bearing assembly and the movable bearing assembly;

[0059] The transverse limit assembly is provided with several parts, each of which is installed in the frame through a fixed connection structure and corresponds to the position of the fixed bearing assembly and the movable support assembly. The transverse limit assembly limits the adjustment position of the movable support assembly and limits the position of the sheet metal piece on the fixed bearing assembly.

[0060] The spacing and positioning components are provided with a plurality of parts, each of which is installed in the frame through a movable connection structure and corresponds to the position of the fixed bearing component and the movable bearing component. When the spacing and positioning components enter between the adjacent fixed bearing group and / or the movable bearing component, the sheet metal pieces on the fixed bearing component or the movable bearing component can be spaced and positioned. When the spacing and positioning components are separated from the adjacent fixed bearing component or the movable bearing component, a gap can be formed between the adjacent sheet metal pieces.

[0061] The lateral transfer assembly is provided with a plurality of parts, each of which is installed in the frame and connected with the movable support assembly, and can drive the movable support assembly and the movable bearing assembly to move, adjust the gap between the movable bearing assembly and the fixed bearing assembly, and adjust the gap between adjacent sheet metal pieces;

[0062] The fixed suction assembly is provided with several parts, each of which is fixedly installed in the frame and corresponds to the position of the fixed bearing assembly. The fixed suction assembly is used to suction and position the sheet metal piece on the fixed bearing assembly;

[0063] The movable suction component is provided with several parts, each movable suction component is installed in the movable support component respectively, and can move with the movable support component. Its position corresponds to the movable bearing component, and the movable suction component sucks and positions the sheet metal material on the movable bearing component.

[0064] In this embodiment, the fixed bearing assembly includes fixed carriers 110 and 120, each of which extends in the horizontal direction and is installed in the frame through a fixed connection structure. There is space between the fixed carriers, and sheet metal pieces can be placed on the fixed carriers and supported by the fixed carriers.

[0065] The movable support assembly includes movable support plates 210 and 220, each of which extends in the transverse direction and is arranged in front of the fixed carrier plate at intervals to form a gap between the fixed carrier plate and the movable support plates. The height of the movable support plates is smaller than that of the fixed support plates.

[0066] The movable supporting assembly includes movable carriers 310 and 320, each of which extends in the transverse direction, is installed on the top of the movable support plate, and is flush with the fixed support plate, forming a gap between the fixed support plate and the movable carrier plate, and the sheet metal piece can be placed on the movable carrier plate and supported by the movable carrier plate.

[0067] The lateral limiting assembly includes inner pins 411, 412 and outer pins 421, 422, 423. Each inner pin is fixedly installed in the frame and located on the inner side of the movable support plate. The inner pins limit the moving range of the movable support plate. Each outer pin is fixedly installed in the frame and located on the outer side of the fixed carrier plate. The outer pins limit the outer edge of the sheet on the fixed carrier plate.

[0068] The spacing and positioning assembly includes positioning partitions 510, 520, 530, and 540, each of which is located in the gap between the fixed carrier and the movable carrier, and is installed in the frame through a vertical movable structure. It can move vertically in the frame. When moving upward, its height is greater than the height of the sheet metal pieces on the fixed carrier and the movable carrier, and the end of the sheet metal piece can be positioned. When moving downward, its height is less than the height of the fixed support plate and the movable support plate, and the sheet metal pieces on the movable support plate and the movable carrier can move over the positioning partition.

[0069] The transverse transfer assembly includes transverse linear rails 611, 612 and transfer cylinders 621, 622. There is at least one pair of transverse linear rails, each of which is installed in the frame and cooperates with the movable support plate. It is arranged obliquely to form an angle with the positioning partition, so that the movable support plate can move along the transverse linear rail, driving the end of the sheet metal piece on the movable carrier plate to abut against the positioning partition, and the positioning partition is used to position it. There is at least one pair of transfer cylinders, each of which is installed in the frame and cooperates with the movable support plate. The transfer cylinder drives the movable support plate and the movable carrier plate to move along the transverse linear rail.

[0070] The fixed suction assembly includes fixed magnetic blocks 710, 720, 730, and 740. There are at least two groups of fixed magnetic blocks. Each group of fixed magnetic blocks is fixedly installed in the frame and corresponds to the position of the fixed carrier. The fixed magnetic blocks are used to suction and position the sheet metal pieces on the fixed carrier.

[0071] The movable suction assembly includes movable magnetic blocks 810, 820, 830, and 840. There are at least two groups of movable magnetic blocks. Each group of movable magnetic blocks is installed on the movable support plate and corresponds to the position of the movable carrier plate. The movable magnetic blocks are used to suction and position the sheet metal pieces on the movable carrier plate.

[0072] like Figure 3 to Figure 5 As shown, the automatic welding method for splicing annular sheet metal of multiple steel plates proposed by the present invention is carried out using the above-mentioned welding tool, which includes the following steps:

[0073] Move the positioning partition upwards to separate it between the fixed carrier plate and the movable carrier plate;

[0074] The robot gripper places each sheet metal piece on the fixed carrier and the movable carrier respectively, and absorbs each sheet metal piece through its suction cup;

[0075] like Figure 3 In the direction of arrow 1 and arrow 2, the sheet metal piece is driven by the robot gripper to move horizontally, so that its end is closely abutted against the positioning partition, and the outer edge of the sheet metal piece on the fixed carrier is closely abutted against the outer pin;

[0076] like Figure 4, move the positioning partition downward to separate it from the end of the sheet metal piece;

[0077] like Figure 5 In the direction of the middle arrow, the movable support plate is driven by the air cylinder to move along the transverse linear rail, so that the movable carrier plate and the sheet metal pieces it carries move together, so that the inner edge of the movable support plate is closely abutted against the inner pin, and the gap between adjacent sheet metal pieces is within the set range;

[0078] The sheet metal pieces are attracted and positioned by fixed magnetic blocks and movable magnetic blocks respectively;

[0079] The positioned sheet metal pieces are welded by laser welding equipment.

[0080] In the description of the present invention, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An automatic welding tool for splicing multiple steel plates into annular sheet metal, characterized in that: include: A fixed load-bearing assembly, which is provided with a plurality of parts, each of which is installed in the frame through a fixed connection structure and is adapted to the shape of the sheet metal piece, and can carry the sheet metal piece; A movable support assembly, which is provided with a plurality of parts, each movable support assembly is installed in the frame through a movable connection structure, and can be moved in the frame, and the fixed bearing assembly and the movable support assembly are arranged in a lateral interval and enclosed to form a ring structure; A movable bearing assembly, which is provided with a plurality of parts, each of which is installed in a movable supporting assembly and can move with the movable supporting assembly. It is adapted to the shape of the sheet metal piece, can carry the sheet metal piece, and can move with the sheet metal piece, and adjust the gap between the fixed bearing assembly and the sheet metal piece carried by the movable bearing assembly; A transverse limit assembly, which is provided with a plurality of parts, each of which is installed in the frame through a fixed connection structure and corresponds to the position of the fixed bearing assembly and the movable support assembly. The transverse limit assembly limits the adjustment position of the movable support assembly and limits the position of the sheet metal piece on the fixed bearing assembly; A spacing and positioning assembly, which is provided with a plurality of parts, each of which is installed in the frame through a movable connection structure and corresponds to the position of the fixed bearing assembly and the movable bearing assembly. When it enters between the adjacent fixed bearing group and or the movable bearing assembly, it can space and position the sheet metal pieces on the fixed bearing assembly or the movable bearing assembly. When it leaves between the adjacent fixed bearing assembly or the movable bearing assembly, it can form a gap between the adjacent sheet metal pieces. A transverse transfer assembly, which is provided with a plurality of parts, each of which is installed in the frame and engaged with the movable support assembly, and can drive the movable support assembly and the movable bearing assembly to move, adjust the gap between the movable bearing assembly and the fixed bearing assembly, and adjust the gap between adjacent sheet metal pieces; A fixed suction assembly, which is provided with a plurality of parts, each of which is fixedly installed in the frame and corresponds to the position of the fixed bearing assembly, and the fixed suction assembly is used to suction and position the sheet metal piece on the fixed bearing assembly; The movable suction component is provided with several parts, each movable suction component is installed in the movable support component respectively, and can move with the movable support component. It corresponds to the position of the movable bearing component, and the movable suction component sucks and positions the sheet metal material on the movable bearing component.

2. The automatic welding tool for splicing multiple steel plates into annular sheet metal according to claim 1, characterized in that: The fixed bearing components include: A fixed carrier is provided with at least one pair, each of which extends in the transverse direction and is installed in the frame through a fixed connection structure. There is space between the fixed carriers, and sheet metal pieces can be placed on the fixed carriers and supported by the fixed carriers.

3. The automatic welding tool for splicing multiple steel plates into annular sheet metal according to claim 2, characterized in that: The movable support components include: The movable support plates are provided with at least one pair, each of which extends in the transverse direction and is arranged in front of the fixed carrier plate at intervals to form a gap between the fixed carrier plate and the movable support plates, and the height of the movable support plates is less than that of the fixed support plates.

4. The automatic welding tool for splicing multiple steel plates into annular sheet metal according to claim 3, characterized in that: The active bearing components include: The movable carrier is provided with at least one pair, each movable carrier extends in the transverse direction, is installed on the top of the movable support plate, and is flush with the fixed support plate, forming a gap between the fixed support plate and the movable carrier plate, and the sheet metal piece can be placed on the movable carrier plate and supported by the movable carrier plate.

5. The automatic welding tool and method for splicing multiple steel plates into annular sheet metal according to claim 3, characterized in that: The lateral limiter assembly includes: Inner pins, at least one pair of which are provided, each of which is fixedly mounted in the frame and located inside the movable support plate, and the inner pins are used to limit the moving range of the movable support plate; The outer pins are provided with at least one pair, each of which is fixedly installed in the frame and located outside the fixed carrier plate, and the outer edge of the sheet on the fixed carrier plate is limited by the outer pins.

6. The automatic welding tool and method for splicing multiple steel plates into annular sheet metal according to claim 4, characterized in that: The interval positioning components include: A group of positioning partitions are provided, each positioning partition is located in the gap between the fixed carrier and the movable carrier, and is installed in the frame through a vertical movable structure. It can move vertically in the frame. When moving upward, its height is greater than the height of the sheet metal pieces on the fixed carrier and the movable carrier, and the end of the sheet metal piece can be positioned. When moving downward, its height is less than the height of the fixed support plate and the movable support plate, and the sheet metal pieces on the movable support plate and the movable carrier can move over the positioning partition.

7. The automatic welding tool and method for splicing multiple steel plates into annular sheet metal according to claim 6, characterized in that: The lateral transfer components include: A transverse linear rail, which is provided with at least one pair, each of which is installed in the frame and cooperates with the movable support plate. It is arranged in an oblique direction and forms an angle with the positioning partition, so that the movable support plate can move along the transverse linear rail, driving the end of the sheet metal piece on the movable carrier plate to abut against the positioning partition, and the positioning partition is used to position it; The transferring cylinder is provided with at least one pair, each transferring cylinder is respectively installed in the frame and cooperates with the movable support plate. The movable support plate and the movable carrier plate are driven by the transferring cylinder to move along the transverse linear rail.

8. The automatic welding tool and method for splicing multiple steel plates into annular sheet metal according to claim 2, characterized in that: The fixed suction assembly includes: The fixed magnetic blocks are provided with at least two groups, each group of fixed magnetic blocks is respectively fixedly installed in the frame and corresponds to the position of the fixed carrier plate, and the fixed magnetic blocks are used to attract and position the sheet metal pieces on the fixed carrier plate.

9. The automatic welding tool and method for splicing multiple steel plates into annular sheet metal according to claim 4, characterized in that: The active suction components include: The movable magnetic blocks are provided with at least two groups, each group of movable magnetic blocks is respectively installed on the movable support plate and corresponds to the position of the movable carrier plate, and the sheet metal pieces on the movable carrier plate are attracted and positioned by the movable magnetic blocks.

10. An automatic welding method for connecting multiple steel plates to annular sheet metal, using the welding tool as claimed in any one of claims 1 to 9, characterized in that: include: Move the positioning partition upwards to separate it between the fixed carrier plate and the movable carrier plate; The robot gripper places each sheet metal piece on the fixed carrier and the movable carrier respectively, and absorbs each sheet metal piece through its suction cup; The robot gripper drives the sheet metal piece to move horizontally, so that its end is closely in contact with the positioning partition, and the outer edge of the sheet metal piece on the fixed carrier is closely in contact with the outer pin column; Move the positioning partition downward to separate it from the end of the sheet metal blank; The movable support plate is driven to move along the transverse linear track by the air cylinder, so that the movable carrier plate and the sheet metal pieces it carries move together, so that the inner edge of the movable support plate is closely abutted against the inner pin, and the gap between adjacent sheet metal pieces is within the set range; The sheet metal pieces are attracted and positioned by fixed magnetic blocks and movable magnetic blocks respectively; The positioned sheet metal pieces are welded by laser welding equipment.

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