Riveting flexible workstation for washing machine housings

Abstract

This invention relates to a flexible workstation for riveting washing machine cabinets, comprising two riveting gun base stations adapted for riveting impeller and drum cabinets, a first conveyor line, an impeller cabinet positioning mechanism reciprocating along the first conveyor line for positioning the impeller cabinet, a second conveyor line, a drum cabinet positioning mechanism reciprocating along the second conveyor line for positioning the drum cabinet, and a robot. During loading, cabinet types are distinguished and placed onto the corresponding first or second conveyor line. The reinforcing plate material to be riveted is sequentially placed onto the impeller cabinet positioning mechanism or drum cabinet positioning mechanism. After placement, the robot, in conjunction with the corresponding riveting gun, sequentially rivets the required points on the product, during which the cabinet automatically rotates 180°. This invention allows multiple tooling units to be online simultaneously, saving manpower and time associated with frequent changes to positioning tooling.

Description

Technical Field

[0001] This invention relates to the field of riveting equipment technology, and in particular to a flexible workstation for riveting washing machine cabinets. Background Technology

[0002] Currently, the mainstream types of washing machines include top-loading washing machines and front-loading washing machines, and their specific structures are as follows:

[0003] Top-loading washing machines are roughly cubic in shape, low in height, and take up little space, with a top-loading lid. The wall panels of a top-loading washing machine consist of four side panels, a plastic or metal base plate, and a top cover frame. They are reinforced by corner plates or reinforcing ribs at the four corners, which are fixed to the flanges of the top cover frame with rivets.

[0004] A front-loading washing machine has a tall, narrow rectangular shape with a side door. The walls of a front-loading washing machine are constructed from welded side panels, a base, a back panel, and a top cover, forming a box-shaped frame. It is reinforced by internal riveted reinforcing plates.

[0005] As can be seen from the above, the cabinet structures of top-loading washing machines and front-loading washing machines are significantly different. The connection between the cabinet and the reinforcing plate of a typical washing machine is completed by a special machine in multiple processes at different points on the cabinet. Therefore, the cabinets of top-loading and front-loading washing machines require different equipment to complete the connection process of the corresponding reinforcing plates. However, the special machine has poor compatibility and cannot be compatible with both top-loading and front-loading machines at the same time.

[0006] In addition, different sizes of washing machine cabinets require separate design and positioning fixtures, which greatly increases equipment costs, and product replacement also consumes a lot of time and manpower. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention discloses a flexible workstation for riveting washing machine cabinets.

[0008] The technical solution adopted in this invention is as follows:

[0009] A flexible workstation for riveting washing machine cabinets includes:

[0010] The first riveting gun base station includes at least two riveting guns for riveting the impeller housing;

[0011] The first conveyor line is located near the base station of the first riveting gun body;

[0012] A pulsator housing positioning mechanism reciprocates along the first conveyor line; the pulsator housing positioning mechanism includes a first upper positioning fixture, a first positioning mechanism, a first lower positioning fixture, and a first rotating mechanism; the first upper positioning fixture forms a first limiting frame; the first lower positioning fixture is mounted on the first rotating mechanism and forms a second limiting frame; the first positioning mechanism is located on one side of the first conveyor line and is configured to press against the first upper positioning fixture; the top of the pulsator housing is located within the first limiting frame, and the bottom of the pulsator housing is located within the second limiting frame;

[0013] The second riveting gun base station includes at least two riveting guns for riveting the roller box body;

[0014] The second conveyor line is located near the base station of the second riveting gun body;

[0015] A roller box positioning mechanism reciprocates along the second conveyor line; the roller box positioning mechanism includes a second positioning mechanism, a third positioning mechanism, a second lower positioning fixture, and a second rotating mechanism; the second positioning mechanism and the third positioning mechanism are both located on one side of the second conveyor line and are configured to press the top of the roller box; the second lower positioning fixture is mounted on the second rotating mechanism and is configured to lock the bottom of the roller box after it slides into the second lower positioning fixture;

[0016] A robot is positioned between the first riveting gun base station and the second riveting gun base station to carry the riveting gun of the first riveting gun base station or the riveting gun of the second riveting gun base station to a designated location.

[0017] In one embodiment of the present invention, the first upper positioning fixture includes a limiting frame, a first limiting member, and a second limiting member; the first limiting member is disposed on the middle part of one side of the limiting frame near the first positioning mechanism; the first limiting member has a positioning groove; the second limiting member is disposed on two adjacent sides of the limiting frame and near the corner of the impeller housing.

[0018] In one embodiment of the present invention, the first upper positioning fixture further includes a third limiting member; the third limiting member is disposed on the limiting frame and between two adjacent second limiting members on the same side of the limiting frame.

[0019] In one embodiment of the present invention, the first positioning mechanism includes a first driving source, a first connecting member connected to the working end of the first driving source, and a first pressure plate connected to the first connecting member; the first driving source drives the first connecting member and causes the first pressure plate to rotate and engage in the positioning groove.

[0020] In one embodiment of the present invention, the first lower positioning fixture includes a first positioning plate, a first blocking member disposed on the first positioning plate and facing the opening side of the impeller housing, and at least one second blocking member disposed on the first positioning plate and facing the closed side of the impeller housing.

[0021] In one embodiment of the present invention, the first rotating mechanism includes a first servo cylinder, a first rack, a first gear, and a first rotating seat; the working end of the first servo cylinder is connected to one end of the first rack; the first rack and the first gear mesh and drive each other; the first gear is located at the bottom of the first rotating seat.

[0022] In one embodiment of the present invention, the second positioning mechanism includes a second driving source, a second connecting member connected to the second driving source, and a second pressure plate connected to the second connecting member; the second driving source drives the second connecting member and causes the second pressure plate to rotate and press against the top of the roller box.

[0023] In one embodiment of the present invention, the third positioning mechanism includes a third driving source, a third connecting member connected to the working end of the third driving source, and a positioning member connected to the third connecting member; the third driving source horizontally pushes the third connecting member to drive the positioning member closer to the corner of the roller box.

[0024] In one embodiment of the present invention, the second lower positioning fixture includes a second positioning plate, a first side plate disposed on the second positioning plate, and a second side plate; the second positioning plate has a sliding groove along its length direction; the first side plate and the second side plate respectively fit against the outer side and inner side of the roller box.

[0025] In one embodiment of the present invention, the second lower positioning fixture further includes a locking member disposed on the first side plate; the locking member is configured to fit against the side of the roller box after locking.

[0026] In one embodiment of the present invention, the second rotating mechanism includes a second servo cylinder, a second rack, a second gear, and a second rotating seat; the working end of the second servo cylinder is connected to one end of the second rack; the second rack and the second gear mesh and drive each other; the second gear is located at the bottom of the second rotating seat.

[0027] In one embodiment of the present invention, the first riveting gun base station includes a first riveting gun having a first gun body connecting flange and a second riveting gun having a second gun body connecting flange.

[0028] In one embodiment of the present invention, the second riveting gun base station includes a third riveting gun with a third gun body connecting flange and a fourth riveting gun with a fourth gun body connecting flange.

[0029] The technical solution of the present invention has the following advantages compared with the prior art:

[0030] The flexible workstation for riveting washing machine cabinets described in this invention is compatible with riveting both pulsator and drum washing machine cabinets. It solves the problem of complicated tooling changes and enables multiple toolings to be online simultaneously, saving manpower and time on frequent changes of positioning tooling.

[0031] The flexible workstation for riveting washing machine cabinets described in this invention simplifies the process steps by using a robot-matched combination of riveting guns with corresponding connection functions. This allows multiple guns to be used to achieve the connection process for different types of cabinets, different sheet thicknesses, and different connection positions, increasing the openness and flexibility of the riveting process. Attached Figure Description

[0032] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0033] Figure 1 This is a structural schematic diagram of the flexible workstation for riveting the washing machine cabinet in this invention.

[0034] Figure 2 This is a structural schematic diagram from a first perspective of the first riveting gun base station or the second riveting gun base station in this invention.

[0035] Figure 3 This is a structural schematic diagram from a second perspective of the first riveting gun base station or the second riveting gun base station in this invention.

[0036] Figure 4 This is a schematic diagram of the structure of the first conveyor line and the impeller housing positioning mechanism in this invention.

[0037] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0038] Figure 6 yes Figure 4 Enlarged diagram of point B in the middle.

[0039] Figure 7 This is a front view of the first conveyor line and the impeller housing positioning mechanism in this invention.

[0040] Figure 8 This is a schematic diagram of the structure of the second conveyor line and the roller box positioning mechanism in this invention.

[0041] Figure 9 yes Figure 8 Enlarged diagram of point C in the middle.

[0042] Figure 10 yes Figure 8 Enlarged diagram of point D in the middle.

[0043] Figure 11 This is a front view of the second conveyor line and the roller box positioning mechanism in this invention.

[0044] Figure 12 This is a schematic diagram of the structure of the first rotating mechanism or the second rotating mechanism in this invention.

[0045] Explanation of reference numerals in the instruction manual:

[0046] 10. First riveting gun base station; 101. First riveting gun; 102. Second riveting gun; 103. First gun body connecting flange; 104. Second gun body connecting flange; 105. First gun body detection switch;

[0047] 20. First conveyor line;

[0048] 30. Impeller housing positioning mechanism; 301. First upper positioning fixture; 3011. First limiting component; 3012. Second limiting component; 3013. Third limiting component; 302. First positioning mechanism; 3021. First connecting component; 3022. First pressure plate; 303. First frame; 304. First base; 305. First lower positioning fixture; 3051. First positioning plate; 3052. First blocking component; 3053. Second blocking component; 306. First rotating mechanism; 3061. First servo cylinder; 3062. First rack; 3063. First gear; 3064. First rotating seat;

[0049] 40. Second riveting gun base station; 401. Third riveting gun; 402. Fourth riveting gun; 403. Third gun body connecting flange; 404. Fourth gun body connecting flange; 405. Second gun body detection switch;

[0050] 50. Second conveyor line;

[0051] 60. Roller box positioning mechanism; 601. Second positioning mechanism; 6011. Second connecting piece; 6012. Second pressure plate; 602. Third positioning mechanism; 6021. Positioning piece; 6022. Third connecting piece; 603. Second frame; 604. Second base; 605. Second lower positioning fixture; 6051. Second positioning plate; 6052. First side plate; 6053. Second side plate; 6054. Locking piece; 606. Second rotating mechanism; 6061. Second servo cylinder; 6062. Second rack; 6063. Second gear; 6064. Second rotating seat;

[0052] 70. Robot;

[0053] 80. Impeller housing; 801. Reinforcing component;

[0054] 90. Drum box body. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0056] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0057] Reference Figure 1 As shown, a flexible workstation for riveting a washing machine casing includes a first riveting gun base station 10, a first conveyor line 20 disposed near the first riveting gun base station 10, a pulsator casing positioning mechanism 30 reciprocating along the first conveyor line 20, a second riveting gun base station 40, a second conveyor line 50 disposed near the second riveting gun base station 40, a drum casing positioning mechanism 60 reciprocating along the second conveyor line 50, and a robot 70 disposed between the first riveting gun base station 10 and the second riveting gun base station 40. The first riveting gun base station 10 is used for riveting the pulsator casing 80. The second riveting gun base station 40 is used for riveting the drum casing 90. The robot 70 is used to carry the riveting gun of the first riveting gun base station 10 or the riveting gun of the second riveting gun base station 40 to a designated position.

[0058] Among them, combined Figure 2 and Figure 3 The first riveting gun base station 10 includes a first workbench, a first riveting gun 101 disposed on the first workbench and equipped with a first gun body connecting flange 103, and a second riveting gun 102 disposed on the first workbench and equipped with a second gun body connecting flange 104. The first riveting gun 101 and the second riveting gun 102 enable the simultaneous completion of riveting operations for two different rivet specifications within a single flexible riveting workstation.

[0059] Furthermore, the first riveting gun 101 and the second riveting gun 102 are respectively provided with a first gun body detection switch 105. The first gun body detection switch 105 is used to detect whether there is a first riveting gun 101 or a second riveting gun 102 on the first workbench, so as to know whether the robot 70 is using the first riveting gun 101 or the second riveting gun 102.

[0060] Combination Figures 4 to 7The impeller housing positioning mechanism 30 includes a first upper positioning fixture 301, a first positioning mechanism 302, a first frame 303, a first base 304, a first lower positioning fixture 305, and a first rotating mechanism 306. The first base 304 is located on one side of the first conveyor line 20. The first frame 303 is mounted on the first base 304, and the first positioning mechanism 302 is mounted on the first frame 303, allowing the first positioning mechanism 302 to press against the top of the impeller housing 80. The first upper positioning fixture 301 forms a first limiting frame. The first lower positioning fixture 305 is mounted on the first rotating mechanism 306 and forms a second limiting frame. The first positioning mechanism 302 is located on one side of the first conveyor line 20 and is configured to press against the first upper positioning fixture 301. The top of the impeller housing 80 is located within the first limiting frame, and the bottom of the impeller housing 80 is located within the second limiting frame.

[0061] Specifically, the first upper positioning fixture 301 includes a limiting frame, a first limiting member 3011, a second limiting member 3012, and a third limiting member 3013. The first limiting member 3011 is located on the limiting frame at the center of one side near the first positioning mechanism 302. The first limiting member 3011 has a positioning groove. The second limiting members 3012 are located on two adjacent sides of the limiting frame and near the corners of the impeller housing 80. The third limiting member 3013 is located on the limiting frame and between two adjacent second limiting members 3012 on the same side of the limiting frame. The third limiting member 3013 and the first limiting member 3011 are installed on opposite sides of the limiting frame. For example, the limiting frame has a first side, a second side, a third side, and a fourth side. The first side and the third side are arranged opposite each other, and the second side and the fourth side are arranged opposite each other. The first limiting member 3011 is installed on the first side and the third side of the limiting frame, and the third limiting member 3013 is installed on the second side and the fourth side of the limiting frame. The difference between the third limiting member 3013 and the first limiting member 3011 is that the third limiting member 3013 partially blocks the top of the impeller housing 80, but no additional power source applies force to press the top of the impeller housing 80.

[0062] The first limiting member 3011 is a fixing block with a positioning groove. The second limiting member 3012 is as follows: Figure 6 As shown, the second limiting member 3012 includes a plate body and a snap-fit ​​portion extending along the length of the plate body. The snap-fit ​​portion faces the reinforcing member 801 of the impeller housing 80. The second limiting members 3012 on both adjacent sides of the limiting frame limit the reinforcing member 801 at one corner of the impeller housing 80, ensuring that the reinforcing member 801 is in the correct riveting position when riveting. The third limiting member 3013 is a plate.

[0063] The first positioning mechanism 302 includes a first drive source, a first connector 3021 connected to the actuating end of the first drive source, and a first pressure plate 3022 connected to the first connector 3021. The first connector 3021 and the first pressure plate 3022 are perpendicular to each other, and the shapes of the first connector 3021 and the first pressure plate 3022 are approximately T-shaped. The first drive source drives the first connector 3021 and causes the first pressure plate 3022 to rotate and engage in the positioning groove.

[0064] The first lower positioning fixture 305 includes a first positioning plate 3051, a first blocking member 3052 disposed on the first positioning plate 3051 and facing the opening side of the impeller housing 80, and at least one second blocking member 3053 disposed on the first positioning plate 3051 and facing the closed side of the impeller housing 80. Since the first blocking member 3052 faces the opening side of the impeller housing 80, it is a continuous plate fixed to the first positioning plate 3051. Since the second blocking member 3053 faces the closed side of the impeller housing 80, it is a stop fixed to the first positioning plate 3051. In this embodiment, two second blocking members 3053 are provided on each closed side of the impeller housing 80.

[0065] like Figure 12 As shown, the first rotating mechanism 306 includes a first servo cylinder 3061, a first rack 3062, a first gear 3063, and a first rotating base 3064. The working end of the first servo cylinder 3061 is connected to one end of the first rack 3062. The first rack 3062 and the first gear 3063 mesh and transmit power. The first gear 3063 is located at the bottom of the first rotating base 3064. When the first servo cylinder 3061 is activated, it drives the first rack 3062, which in turn meshes with the first gear 3063, causing the first rotating base 3064 to rotate 180°.

[0066] Combination Figure 2 and Figure 3 The second riveting gun base station 40 includes a second workbench, a third riveting gun 401 mounted on the second workbench and equipped with a third gun body connecting flange 403, and a fourth riveting gun 402 mounted on the second workbench and equipped with a fourth gun body connecting flange 404. The third riveting gun 401 and the fourth riveting gun 402 enable the simultaneous completion of riveting operations for two different rivet specifications within a single flexible riveting workstation.

[0067] Furthermore, the third riveting gun 401 and the fourth riveting gun 402 are each equipped with a second gun body detection switch 405. The second gun body detection switch 405 is used to detect whether there is a third riveting gun 401 and a fourth riveting gun 402 on the second workbench, so as to know whether the robot 70 is using the third riveting gun 401 and the fourth riveting gun 402.

[0068] Combination Figures 8 to 11 The roller housing positioning mechanism 60 includes a second positioning mechanism 601, a third positioning mechanism 602, a second frame 603, a second base 604, a second lower positioning fixture 605, and a second rotating mechanism 606. The second base 604 is located on one side of the second conveyor line 50. The second frame 603 is mounted on the second base 604, and the second positioning mechanism 601 and the third positioning mechanism 602 are mounted on the second frame 603, allowing them to press against the top of the roller housing 90. Both the second positioning mechanism 601 and the third positioning mechanism 602 are located on one side of the second conveyor line 50 and are configured to press against the top of the roller housing 90. The second lower positioning fixture 605 is mounted on the second rotating mechanism 606 and is configured to lock after the bottom of the roller housing 90 slides into the second lower positioning fixture 605.

[0069] The second positioning mechanism 601 includes a second drive source, a second connector 6011 connected to the second drive source, and a second pressure plate 6012 connected to the second connector 6011. The second drive source drives the second connector 6011 and causes the second pressure plate 6012 to rotate and press the top of the roller box 90.

[0070] The third positioning mechanism 602 includes a third drive source, a third connector 6022 connected to the working end of the third drive source, and a positioning member 6021 connected to the third connector 6022. The third drive source horizontally pushes the third connector 6022, causing the positioning member 6021 to approach the corner of the roller housing 90. The positioning member 6021 is an L-shaped member that can abut against the corner of the roller housing 90. Since the roller housing 90 has four corners, four third positioning mechanisms 602 are provided. Two third positioning mechanisms 602 are located on the same side, and a second positioning mechanism 601 is located between the two third positioning mechanisms 602 located on the same side.

[0071] The second lower positioning fixture 605 includes a second positioning plate 6051, a first side plate 6052 disposed on the second positioning plate 6051, and a second side plate 6053. The second positioning plate 6051 has a sliding groove along its length. The first side plate 6052 and the second side plate 6053 respectively conform to the outer and inner sides of the wall panel of the roller housing 90. Preferably, the second positioning plate 6051 has two sliding grooves along its length to accommodate roller housings 90 of different widths.

[0072] Furthermore, the second lower positioning fixture 605 also includes a locking member 6054 disposed on the first side plate 6052. The locking member 6054 is configured to fit against the side of the roller housing 90 after locking. The locking member 6054 may be a torsion lock. When the wall panel of the roller housing 90 slides into the slide groove, the first side plate 6052 and the second side plate 6053 together clamp the roller housing 90, and the first side plate 6052 and the second side plate 6053 achieve initial positioning, and then the locking member 6054 locks it.

[0073] like Figure 12 As shown, the second rotating mechanism 606 includes a second servo cylinder 6061, a second rack 6062, a second gear 6063, and a second rotating base 6064. The working end of the second servo cylinder 6061 is connected to one end of the second rack 6062. The second rack 6062 and the second gear 6063 mesh and drive each other. The second gear 6063 is located at the bottom of the second rotating base 6064. When the second servo cylinder 6061 is activated, it pushes the second rack 6062, which meshes with the second gear 6063, causing the second rotating base 6064 to rotate 180°.

[0074] Both the first conveyor line 20 and the second conveyor line 50 include a bracket, a guide rail arranged along the length of the bracket, a conveying rack arranged along the length of the bracket, a support plate, a servo motor mounted on the support plate, a gear fixed to the support plate and connected to the output end of the servo motor, and a slider that slides along the guide rail and is fixed to the support plate. It is understood that the support plate and the bracket are slidably connected. The number of support plates is designed based on the number of impeller housing positioning mechanisms 30 or roller housing positioning mechanisms 60. When the servo motor is started, it drives the gear to rotate, causing the support plate to reciprocate along the length of the bracket.

[0075] It should be noted that, to ensure the reliability of positioning the top of the impeller housing 80 or the drum housing 90, this embodiment provides two first positioning mechanisms 302, which are symmetrically arranged about the first conveyor line 20. Two second positioning mechanisms 601 are also provided, symmetrically arranged about the second conveyor line 50. Four third positioning mechanisms 602 are provided, with every two third positioning mechanisms 602 symmetrically arranged about the second conveyor line 50.

[0076] In this embodiment, the first and second drive sources are commercially available clamping cylinders, and the third drive source is a commercially available electric cylinder, to accommodate roller boxes 90 of different widths.

[0077] In this embodiment, the free end of the robot 70 is provided with a flange. The flange of the robot 70 matches the flange of the rivet gun of the first rivet gun base station 10 or the rivet gun of the second rivet gun base station 40. This can be done manually or upgraded to an automatic rivet gun changing disc to achieve automatic rivet gun changing.

[0078] The working principle of this invention is as follows:

[0079] During material loading, the type of washing machine cabinet is distinguished, and the material is placed at the corresponding loading position, i.e., the starting end of the first conveyor line 20 or the starting end of the second conveyor line 50. Reinforcing materials, such as reinforcing parts 801 adapted to the impeller cabinet 80, are loaded sequentially. After loading, the robot 70, in conjunction with any one of the corresponding riveting guns, such as the first riveting gun 101, the second riveting gun 102, the third riveting gun 401, and the fourth riveting gun 402, sequentially rivets the impeller cabinet 80 or the drum cabinet 90 at the required points.

[0080] Once the riveting is complete, the impeller housing positioning mechanism 30 moves along the first conveyor line 20 to the unloading position, i.e., the end of the first conveyor line 20; or, the roller housing positioning mechanism 60 moves along the second conveyor line 50 to the unloading position, i.e., the end of the second conveyor line 50.

[0081] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0082] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A flexible workstation for riveting washing machine cabinets, characterized in that, include: The first riveting gun base station (10) includes at least two riveting guns for riveting the impeller housing (80). The first conveyor line (20) is located near the first riveting gun base station (10); The impeller housing positioning mechanism (30) reciprocates along the first conveyor line (20); the impeller housing positioning mechanism (30) includes a first upper positioning fixture (301), a first positioning mechanism (302), a first lower positioning fixture (305), and a first rotating mechanism (306); the first upper positioning fixture (301) forms a first limiting frame; the first lower positioning fixture (305) is mounted on the first rotating mechanism (306) and forms a second limiting frame; the first positioning mechanism (302) is located on one side of the first conveyor line (20) and is configured to press the top of the impeller housing (80); the top of the impeller housing (80) is located within the first limiting frame, and the bottom of the impeller housing (80) is located within the second limiting frame; The second riveting gun base station (40) includes at least two riveting guns for riveting the roller box (90). The second conveyor line (50) is located near the second riveting gun base station (40); The roller housing positioning mechanism (60) reciprocates along the second conveyor line (50); the roller housing positioning mechanism (60) includes a second positioning mechanism (601), a third positioning mechanism (602), a second lower positioning fixture (605), and a second rotating mechanism (606); the second positioning mechanism (601) and the third positioning mechanism (602) are both located on one side of the second conveyor line (50) and are configured to press the top of the roller housing (90); the second lower positioning fixture (605) is mounted on the second rotating mechanism (606) and is configured to lock the bottom of the roller housing (90) after it slides into the second lower positioning fixture (605); A robot (70) is positioned between the first riveting gun base station (10) and the second riveting gun base station (40) to carry the riveting gun of the first riveting gun base station (10) or the riveting gun of the second riveting gun base station (40) to a designated position. The first riveting gun base station (10) includes a first riveting gun (101) with a first gun body connecting flange (103) and a second riveting gun (102) with a second gun body connecting flange (104). The second riveting gun base station (40) includes a third riveting gun (401) with a third gun body connecting flange (403) and a fourth riveting gun (402) with a fourth gun body connecting flange (404).

2. The flexible workstation for riveting the washing machine casing according to claim 1, characterized in that, The first upper positioning fixture (301) includes a limiting frame, a first limiting member (3011), and a second limiting member (3012); the first limiting member (3011) is located on the middle part of one side of the limiting frame near the first positioning mechanism (302); the first limiting member (3011) has a positioning groove; the second limiting member (3012) is located on the two adjacent sides of the limiting frame and near the corner of the impeller housing (80).

3. The flexible workstation for riveting the washing machine casing according to claim 2, characterized in that, The first upper positioning fixture (301) further includes a third limiting member (3013); the third limiting member (3013) is disposed on the limiting frame and between two adjacent second limiting members (3012) on the same side of the limiting frame.

4. The flexible workstation for riveting the washing machine casing according to claim 2, characterized in that, The first positioning mechanism (302) includes a first driving source, a first connecting member (3021) connected to the working end of the first driving source, and a first pressure plate (3022) connected to the first connecting member (3021); the first driving source drives the first connecting member (3021) and causes the first pressure plate (3022) to rotate and be inserted into the positioning groove.

5. The flexible workstation for riveting washing machine casings according to claim 1, characterized in that, The first lower positioning fixture (305) includes a first positioning plate (3051), a first blocking member (3052) disposed on the first positioning plate (3051) and facing the opening side of the impeller housing (80), and at least one second blocking member (3053) disposed on the first positioning plate (3051) and facing the closed side of the impeller housing (80).

6. The flexible workstation for riveting washing machine casings according to claim 1, characterized in that, The first rotating mechanism (306) includes a first servo cylinder (3061), a first rack (3062), a first gear (3063), and a first rotating seat (3064); the working end of the first servo cylinder (3061) is connected to one end of the first rack (3062); the first rack (3062) and the first gear (3063) mesh and drive each other; the first gear (3063) is located at the bottom of the first rotating seat (3064).

7. The flexible workstation for riveting the washing machine casing according to claim 1, characterized in that, The second positioning mechanism (601) includes a second drive source, a second connector (6011) connected to the second drive source, and a second pressure plate (6012) connected to the second connector (6011); the second drive source drives the second connector (6011) and causes the second pressure plate (6012) to rotate and press against the top of the roller box (90).

8. The flexible workstation for riveting washing machine casings according to claim 1, characterized in that, The third positioning mechanism (602) includes a third driving source, a third connector (6022) connected to the working end of the third driving source, and a positioning member (6021) connected to the third connector (6022); the third driving source horizontally pushes the third connector (6022) to drive the positioning member (6021) closer to the corner of the roller box (90).

9. The flexible workstation for riveting the washing machine casing according to claim 1, characterized in that, The second lower positioning fixture (605) includes a second positioning plate (6051), a first side plate (6052) and a second side plate (6053) disposed on the second positioning plate (6051); the second positioning plate (6051) has a sliding groove along its length; the first side plate (6052) and the second side plate (6053) respectively fit the outer side and inner side of the wall panel of the roller box (90).

10. The flexible workstation for riveting the washing machine casing according to claim 1, characterized in that, The second rotating mechanism (606) includes a second servo cylinder (6061), a second rack (6062), a second gear (6063), and a second rotating seat (6064); the working end of the second servo cylinder (6061) is connected to one end of the second rack (6062); the second rack (6062) and the second gear (6063) mesh and drive each other; the second gear (6063) is located at the bottom of the second rotating seat (6064).

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