Automatic welding device for support legs

Abstract

The present invention relates to an automated leg welding device, belonging to the technical field of welding equipment. The device comprises a welding bed and a welding robot. The welding bed is provided with a leg fixture for placing the leg, and a rotatable welding turntable mechanism. The welding turntable mechanism includes a turntable for placing the leg fixture. The turntable has a plurality of placement slots, and the leg fixtures are placed in the placement slots. The turntable is driven to rotate by a stepper motor. The high degree of automation reduces labor costs. The use of the present invention for welding legs has significant advantages in some welding scenarios that are difficult to process manually or that are insufficiently controlled by human labor.

Description

Technical Field

[0001] The invention relates to an automatic welding device for supporting legs, belonging to the technical field of welding equipment. Background Art

[0002] The support leg has a wide range of applications and consists of a center bolt, an outer shell, and a connecting disc. The connecting disc is a ring with a circular hole in the middle. The outer shell is located on the outer circumference of the ring, and the center bolt is located inside the ring. The bottom of the center bolt is welded to the circular hole in the center of the ring.

[0003] The three parts of the support leg are generally assembled by welding. However, due to the imperfect technology and the non-uniform and complex shape and structure of the support leg, most of the welding of the support leg is done manually. The welding work is labor-intensive and requires high welding skills. Training excellent welding personnel is time-consuming and costly.

[0004] Prior art discloses a two-axis robot-assisted welding device for support legs. The device comprises a base with a vertically fixed column on one side of the upper end, a lifting mechanism mounted in the column, a cantilever mounted on the lifting mechanism, a positioning cylinder mounted on the cantilever, and a loose-parts positioning rotary tooling mounted at the bottom of the cantilever. A workpiece rotating mechanism is mounted on the upper end of the base, a clamping chuck mounted on the workpiece rotating mechanism, an intermediate disc positioning device mounted on one side of the clamping chuck, and a cross-beam detection switch mounted on the outer side of the workpiece rotating mechanism. This device has a low degree of automation and low clamping and positioning accuracy, which affects weld quality. The device is not suitable for automated welding of support legs consisting of a center bolt, an outer shell, and a connecting disc. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problems in the prior art of low automation and difficulty in ensuring welding quality, and to provide an automatic welding device for support legs.

[0006] The present invention is achieved through the following technical solutions:

[0007] That is, an automatic welding device for supporting legs, including a welding bed and a welding robot. The welding bed is provided with a supporting leg fixture for placing the supporting legs, and the welding bed is provided with a rotatable welding turntable mechanism. The welding turntable mechanism includes a turntable for placing the supporting leg fixture, and a plurality of placement slots are opened on the turntable. The supporting leg fixture is placed in the placement slots, and the turntable is driven to rotate by a stepper motor.

[0008] The support leg fixture is placed in the placement groove, the support leg fixture clamps the three parts of the support leg, the stepper motor drives the welding turntable mechanism to rotate, and the welding robot performs automatic welding operations on the support leg. The degree of automation is high, which reduces labor costs. For some welding scenarios that are difficult to process manually or where human labor is insufficient to control, the use of the welding support leg of the present invention has huge advantages.

[0009] Further preferably, the welding turntable mechanism includes a turntable bearing support mounted on the top of the welding bed, and a bearing is installed between the turntable bearing support and the turntable, which plays a supporting and guiding role, reduces damage to various components in the welding turntable mechanism, and extends the service life.

[0010] Further preferably, the upper end surface of the turntable bearing support is provided with an outer convex ring and an inner convex ring, and the lower end surface of the turntable is also provided with an outer convex ring and an inner convex ring. A second turntable bearing is mounted between the outer convex ring of the turntable bearing support and the outer convex ring of the turntable, and a first turntable bearing is mounted between the inner convex ring of the turntable bearing support and the inner convex ring of the turntable. This provides better support and protection for the turntable, improves the stability of the turntable during rotation, and helps improve welding quality.

[0011] Further preferably, a spacer is provided between the inner convex ring of the turntable bearing support and the turntable bearing. In the process of the turntable constantly rotating, there is more or less damage to the components, and the spacer is provided to protect other components, and the spacer can be replaced.

[0012] Further preferably, three linear conveying mechanisms are included, which are used to convey the outer shell, the center bolt and the connecting disc respectively. The upper ends of the three welding beds are provided with a loader 1 for loading the outer shell, a loader 2 for loading the center bolt, a loader 3 for loading the connecting disc and a finished product unloader;

[0013] Loader 1, Loader 2, and Loader 3 have two degrees of freedom of movement in the vertical direction and the horizontal direction;

[0014] One end of the loader is located above the linear conveying mechanism for conveying the outer shell, the second end of the loader is located above the linear conveying mechanism for conveying the center bolt, and the third end of the loader is located above the linear conveying mechanism for conveying the connecting wafers.

[0015] Further preferably, the actuators of the loader 1, loader 2, and finished product unloader are two rubber clamps whose tension is controlled by a cylinder;

[0016] The actuator of loader three is a negative pressure suction cup.

[0017] The first and second feeders clamp the central bolt and the outer shell to realize automatic feeding, and the third feeder sucks the connecting disc to realize automatic feeding, thereby further improving the degree of automation of the present invention.

[0018] Further preferably, a turning mechanism is provided at the starting end of the linear conveying mechanism for conveying the outer shell;

[0019] The flipping mechanism includes an oblique bracket and a column. The oblique bracket is equipped with a guide groove plate, the upper end of the column is equipped with a horizontal column, and the lower end of the horizontal column is equipped with a flip hook. During the loading process, the outer shell must ensure that the arc surface is downward, that is, the support legs are fixed. However, during transportation, analysis of the outer shell shows that the outer shell is very easy to flip to the flat surface downward. Therefore, a flipping mechanism for the outer shell is added. The outer shell slides downward under the action of gravity on the guide groove plate and reaches the flip hook. If the arc surface faces forward, it will push the flip pin away. However, the shell with the flat surface facing forward will be covered above the hook, and finally the flip is completed under the push of the next shell. This avoids errors in the welding and assembly of the support legs and improves welding efficiency.

[0020] Further preferably, the support leg fixture includes a circular base plate and an outer and inner rings fixed to the base plate. The center bolt is positioned within the inner ring, the outer shell is positioned between the two rings, and the connecting disc is positioned at the upper end of the inner ring, with the top of the center bolt positioned within the center hole of the connecting disc. The support leg fixture is used to clamp the three components of the support leg, and the clamping structure is rational, which helps ensure welding quality.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The support leg fixture is placed in the placement groove, the support leg fixture clamps the three parts of the support leg, the stepper motor drives the welding turntable mechanism to rotate, and the welding robot performs automatic welding operations on the support leg. The degree of automation is high, which reduces labor costs. For some welding scenarios that are difficult to process manually or where human labor is insufficient to control, the use of the welding support leg of the present invention has huge advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the flipping mechanism according to a specific embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the exploded structure of the welding turntable mechanism and the welding bed according to a specific embodiment of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the welding turntable mechanism according to a specific embodiment of the present invention.

[0028] Figure 5 It is a schematic cross-sectional structural diagram of a welding turntable mechanism according to a specific embodiment of the present invention.

[0029] Figure 6 It is a structural schematic diagram of a support leg clamp according to a specific embodiment of the present invention.

[0030] In the figure: 1. Display; 2. Linear conveying mechanism; 3. Support leg fixture; 4. Connecting disc; 5. Outer shell; 6. Center bolt; 7. Turning mechanism; 8. Finished product unloader; 9. Loader 1; 10. Loader 2; 11. Loader 3; 12. Welding robot; 13. Welding turntable mechanism; 14. Welding bed; 15. Oblique bracket; 16. Guide groove plate; 17. Vertical column; 18. Horizontal column; 19. Turning hook; 20. Stepper motor; 21. Reducer; 22. Turntable bearing support; 23. Turntable bearing 1; 24. Spacer; 25. Turntable bearing 2; 26. Turntable; 27. Placement groove; 28. Round bottom plate; 29. ​​Outer ring; 30. Inner ring. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1:

[0033] like Figures 1 to 6 The shown device is an automated leg welding device, comprising a welding bed 14 and a welding robot 12. The welding bed 14 is provided with a leg fixture 3 for placing the leg and a display 1. The welding bed 14 is provided with a rotatable welding turntable mechanism 13. The welding turntable mechanism 13 includes a turntable 26 for placing the leg fixture 3. The turntable 26 is provided with a plurality of placement slots 27. The leg fixture 3 is placed in the placement slots 27. The turntable 26 is driven to rotate by a stepper motor 20. A reducer 21 is provided between the stepper motor 20 and the turntable 26.

[0034] Example 2:

[0035] like Figures 1 to 6 As shown Figures 1 to 5The shown device is an automated leg welding device, comprising a welding bed 14 and a welding robot 12. The welding bed 14 is provided with a leg fixture 3 for placing the leg and a display 1. The welding bed 14 is provided with a rotatable welding turntable mechanism 13. The welding turntable mechanism 13 includes a turntable 26 for placing the leg fixture 3. The turntable 26 is provided with a plurality of placement slots 27. The leg fixture 3 is placed in the placement slots 27. The turntable 26 is driven to rotate by a stepper motor 20. A reducer 21 is provided between the stepper motor 20 and the turntable 26.

[0036] The welding turntable mechanism 13 includes a turntable bearing support 22 installed on the top of the welding bed 14, and a bearing is installed between the turntable bearing support 22 and the turntable 26. The upper end surface of the turntable bearing support 22 is provided with an outer convex ring and an inner convex ring, and the lower end surface of the turntable 26 is also provided with an outer convex ring and an inner convex ring. A turntable bearing 25 is installed between the outer convex ring of the turntable bearing support 22 and the outer convex ring of the turntable 26, and a turntable bearing 1 23 is installed between the inner convex ring of the turntable bearing support 22 and the inner convex ring of the turntable 26. A spacer sleeve 24 is provided between the inner convex ring of the turntable bearing support 22 and the turntable bearing 1 23.

[0037] Example 3:

[0038] like Figures 1 to 6 As shown Figures 1 to 5 The shown device is an automated leg welding device, comprising a welding bed 14 and a welding robot 12. The welding bed 14 is provided with a leg fixture 3 for placing the leg and a display 1. The welding bed 14 is provided with a rotatable welding turntable mechanism 13. The welding turntable mechanism 13 includes a turntable 26 for placing the leg fixture 3. The turntable 26 is provided with a plurality of placement slots 27. The leg fixture 3 is placed in the placement slots 27. The turntable 26 is driven to rotate by a stepper motor 20. A reducer 21 is provided between the stepper motor 20 and the turntable 26.

[0039] The welding turntable mechanism 13 includes a turntable bearing support 22 installed on the top of the welding bed 14, and a bearing is installed between the turntable bearing support 22 and the turntable 26. The upper end surface of the turntable bearing support 22 is provided with an outer convex ring and an inner convex ring, and the lower end surface of the turntable 26 is also provided with an outer convex ring and an inner convex ring. A turntable bearing 25 is installed between the outer convex ring of the turntable bearing support 22 and the outer convex ring of the turntable 26, and a turntable bearing 1 23 is installed between the inner convex ring of the turntable bearing support 22 and the inner convex ring of the turntable 26. A spacer sleeve 24 is provided between the inner convex ring of the turntable bearing support 22 and the turntable bearing 1 23.

[0040] It also includes three linear conveying mechanisms 2, which are used to transport the outer shell 5, the center bolt 6 and the connecting disc 4 respectively. The upper ends of the three welding beds 14 are provided with a loader 9 for loading the outer shell 5, a loader 2 10 for loading the center bolt 6, a loader 3 11 for loading the connecting disc 4, and a finished product unloader 8;

[0041] The first loader 9, the second loader 10, and the third loader 11 have two degrees of freedom of movement in the vertical direction and the horizontal direction;

[0042] The end of loader 1 9 is located above the linear conveying mechanism 2 for conveying the outer shell 5, the end of loader 2 10 is located above the linear conveying mechanism 2 for conveying the center bolt 6, and the end of loader 3 11 is located above the linear conveying mechanism 2 for conveying the connecting wafer 4.

[0043] The actuators of loader 1 9 , loader 2 10 , and finished product unloader 8 are two rubber clamps whose tension is controlled by a cylinder, and the actuator of loader 3 11 is a negative pressure suction cup.

[0044] The starting end of the linear conveying mechanism 2 for conveying the outer shell 5 is provided with a turning mechanism 7;

[0045] The flip mechanism 7 includes an oblique bracket 15 and a column 17 . A guide slot plate 16 is provided on the oblique bracket 15 . A transverse column 18 is provided at the upper end of the column 17 . A flip hook 19 is installed at the lower end of the transverse column 18 .

[0046] The support leg fixture 3 includes a circular bottom plate 28 and an outer circular ring 29 and an inner circular ring 30 fixed on the circular bottom plate 28 .

[0047] Working principle:

[0048] The linear conveyor transports the three parts of the support leg, the loader clamps or absorbs the three parts of the support leg, and places the three parts of the support leg on the support leg fixture. The stepper motor drives the welding turntable mechanism to rotate, and the welding robot 12 performs automatic welding operations on the support leg. The degree of automation is high, which reduces labor costs. For some welding scenarios that are difficult to process manually or that are not easily controlled by manpower, the use of the present invention to weld the support leg has huge advantages.

[0049] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0050] The terms "upper," "lower," "outer," "inner," and the like, if used in the present description and claims, and in the accompanying drawings, are used to distinguish relative positions and are not necessarily qualitative. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions.

[0051] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automated leg welding device, comprising a welding bed (14) and a welding robot (12), wherein a leg fixture (3) for placing the leg is provided on the welding bed (14), characterized in that: A rotatable welding turntable mechanism (13) is provided on the welding bed (14), the welding turntable mechanism (13) includes a turntable (26) for placing the support fixture (3), a plurality of placement slots (27) are provided on the turntable (26), the support fixture (3) is placed in the placement slots (27), and the turntable (26) is driven to rotate by a stepper motor (20); the welding turntable mechanism (13) includes a turntable bearing support (22) installed on the top of the welding bed (14), a bearing is installed between the turntable bearing support (22) and the turntable (26); the upper end surface of the turntable bearing support (22) An outer convex ring and an inner convex ring are provided, and an outer convex ring and an inner convex ring are also provided on the lower end surface of the turntable (26). A turntable bearing 2 (25) is installed between the outer convex ring of the turntable bearing support (22) and the outer convex ring of the turntable (26), and a turntable bearing 1 (23) is installed between the inner convex ring of the turntable bearing support (22) and the inner convex ring of the turntable (26); and three linear conveying mechanisms (2) are also included. The three linear conveying mechanisms (2) are used to convey the outer shell (5), the center bolt (6) and the connecting disc (4) respectively. The upper ends of the three welding beds (14) are provided with a material feeding mechanism. The first loader (9) for the outer shell (5), the second loader (10) for loading the center bolt (6), the third loader (11) for loading the connecting disc (4) and the finished product unloader (8); the first loader (9), the second loader (10) and the third loader (11) have two degrees of freedom of movement in the vertical direction and the horizontal direction; the end of the first loader (9) is located above the linear conveying mechanism (2) for conveying the outer shell (5), the end of the second loader (10) is located above the linear conveying mechanism (2) for conveying the center bolt (6), and the end of the third loader (11) is located above the linear conveying mechanism (2) for conveying the center bolt (6). 1) The end portion is located above a linear conveying mechanism (2) for conveying a connecting disc (4); a turning mechanism (7) is provided at the starting end of the linear conveying mechanism (2) for conveying an outer shell shell (5); the turning mechanism (7) includes an oblique bracket (15) and a column (17); a guide groove plate (16) is provided on the oblique bracket (15); a transverse column (18) is provided at the upper end of the column (17); and a turning hook (19) is installed at the lower end of the transverse column (18); and the support foot fixture (3) includes a circular bottom plate (28) and an outer circular ring (29) and an inner circular ring (30) fixed on the circular bottom plate (28).

2. The automatic welding device for support legs according to claim 1, characterized in that: A spacer sleeve (24) is provided between the inner convex ring of the turntable bearing support (22) and the turntable bearing 1 (23).

3. The automatic welding device for supporting legs according to claim 1, characterized in that: The actuators of the loader 1 (9), loader 2 (10) and finished product unloader (8) are two rubber clamps whose tension is controlled by a cylinder; the actuator of the loader 3 (11) is a negative pressure suction cup.

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