Lifting lug grabbing mechanism, welding clamp and welding system

Abstract

The utility model relates to the technical field of welding equipment, in particular to a lifting lug grabbing mechanism, a welding clamp and a welding system. The lifting lug is at least formed by combining a cap part and a vertical part and is of a T-shaped structure, the grabbing assembly is used for grabbing and transferring the lifting lug, the grabbing assembly comprises an installation plate, a straight stroke assembly is installed on the installation plate, the power end of the straight stroke assembly is connected with a grabbing plate capable of doing reciprocating motion in the radial direction of the lifting lug, and the grabbing plate is connected with the lifting lug. An inserting opening for the vertical part to slide in is formed in the progress end, moving towards the lifting lug, of the grabbing plate, a groove is formed in the upper portion of the inserting opening in a concave mode, and the outline of the groove wall of the groove is matched with the outline of the periphery of the cap part so that the cap part can be prevented from generating displacement action in the moving direction of the grabbing plate in the lifting state. The grabbing process is efficient and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to an ear grabbing mechanism, a welding fixture and a welding system. Background Technique

[0002] At present, friction stir welding technology is mostly used for the battery trays in the field of new energy vehicles.

[0003] During welding operations, hoisting operations of pressing plates or products in fixtures are often involved. Specifically, the form of grabbing the lugs on the parts to be hoisted by a grabbing mechanism is mostly adopted. Most of the existing grabbing mechanisms for grabbing lugs are recorded in the text with the Chinese patent publication number CN111906476B and the name of an automatic lug welding workbench and its control method, which use the translation opening or closing between a long claw clip and a short claw clip to realize the release and grabbing of the lug. However, in actual implementation, this grabbing requires a power source to continuously apply a clamping force to the lug. Due to the high execution efficiency of the air cylinder, it is often used as the power source in the grabbing mechanism. When a power mechanism such as an air cylinder has an air cut-off failure or a solenoid valve failure, there is a risk of the lug falling, so it needs to be solved urgently. Summary of the Utility Model

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides an ear grabbing mechanism, a welding fixture and a welding system, and the grabbing process is efficient and stable.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An ear grabbing mechanism includes an ear with a T-shaped structure formed by at least a cap part and a vertical part, and a grabbing component for grabbing and transporting the ear. The grabbing component includes a mounting plate, on which a linear stroke component is installed. The power end of the linear stroke component is connected with a grabbing plate that can reciprocate radially along the ear. The process end of the grabbing plate moving towards the ear is provided with a socket for the vertical part to slide into, and a groove is recessed in the upper part of the socket, and the contour of the groove wall is adapted to the outer peripheral contour of the cap part to prevent the cap part in the hoisting state from generating displacement actions along the moving direction of the grabbing plate.

[0007] As a further scheme of the utility model: the ears are arranged in a rectangular array of four, and the grabbing plates are arranged in four corresponding to the ears one by one.

[0008] As a further scheme of the utility model: an elastic buffer is installed at the bottom of the mounting plate.

[0009] Welding fixture, which applies the lug grabbing mechanism described above, including a fixture assembly. The fixture assembly includes a base for loading the product and a pressing plate located directly above the base and pressing the product onto the base. The pressing plate is fixed to the bottom of the lug. A circumferential pressing mechanism is provided on the base, and the circumferential pressing mechanism includes a first pressing part for pressing the product downward and a second pressing part for pressing the pressing plate downward.

[0010] As a further solution of the present utility model: A magnetic part capable of magnetic attraction cooperation with the pressing plate is provided on the base.

[0011] As a further solution of the present utility model: A heating module is installed on the base.

[0012] As a further solution of the present utility model: A positioning component for positioning the installation position of the product is installed on the base.

[0013] As a further solution of the present utility model: Fixed pressing blocks and floating pressing blocks are arranged on the outer periphery of the pressing plate.

[0014] As a further solution of the present utility model: It further includes a truss and a lifting component installed on the truss for driving the grabbing component to perform lifting motion. The power end of the lifting component is connected to the mounting plate, and an adjusting component for adjusting the position of the mounting plate along the X-axis and Y-axis is provided between the power end of the lifting component and the mounting plate.

[0015] Welding system, which applies the welding fixture described above, including a welding robot. The fixture assemblies are arranged in two groups symmetrically on both sides of the welding robot.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. When the power end of the linear travel component drives the grabbing plate to move towards the lug and the socket is sleeved around the outer periphery of the vertical part of the lug, when the grabbing component moves upward to lift the lug, the grabbing plate will move upward and the cap of the lug will slide into the interior of the groove to lift the lug upward. Since the inner wall contour of the groove is adapted to the outer periphery contour of the cap, therefore, in the lifted state of the lug, the horizontal limit of the grabbing plate can be achieved through the clamping of the cap and the groove wall on the grabbing plate. Even when the linear travel component fails, the grabbing plate will not generate horizontal movement resulting in the dropping of the lug, ensuring the stability of the lug during the hoisting process.

[0018] 2. An elastic buffer is installed at the bottom of the mounting plate in the grabbing mechanism, which not only provides elastic buffering during the downward movement of the grabbing mechanism, but also when applied to the hoisting of the pressing plate of the welding fixture, after the pressing plate is hoisted to the designated position, it can apply a downward elastic pressing force to the pressing plate to assist the pressing plate to achieve stable pressing operation.

[0019] 3. The circumferential pressing mechanism includes a first pressing part for pressing the product downward and a second pressing part for pressing the pressing plate downward. Thus, double locking and fixing of the product are achieved, ensuring stable abutment between the parts of the product to be welded, so as to facilitate stable welding operation of the product.

[0020] 4. A magnetic attracting part capable of magnetically attracting and cooperating with the pressing plate is arranged on the base, which can assist in fixing between the pressing plate and the base 41.

[0021] 5. A heating module is installed on the base to heat the product. By using the characteristic of thermal expansion, a part of the internal contraction caused by welding is offset, ensuring the flatness of the product after welding.

[0022] 6. This welding system adopts a layout of double welding stations. When the welding robot is welding at one welding station, the other welding station repeats the actions of the first welding station, so that the welding robot can alternately weld at the two stations, improving the efficiency of the entire welding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic connection structure diagram of the grasping mechanism and the pressing plate in the present utility model.

[0024] Figure 2 It is a main sectional structure diagram of the connection between the grasping mechanism and the pressing plate in the present utility model.

[0025] Figure 3 It is Figure 2 A partially enlarged structure diagram of part A in

[0026] Figure 4 It is a main view structure diagram of the grasping mechanism and the pressing plate in the present utility model.

[0027] Figure 5 It is a structure diagram of the pressing plate in the present utility model.

[0028] Figure 6 It is a structure diagram of the fixture assembly in the present utility model.

[0029] Figure 7 It is a schematic connection structure diagram of the grasping mechanism and the lifting assembly in the present utility model

[0030] Figure 8 It is a schematic structure diagram of the present utility model

[0031] In the figure: 10, truss; 20, lifting assembly; 21, adjusting assembly; 30, grasping assembly; 31, mounting plate; 32, linear travel assembly; 33, grasping plate; 331, groove; 332, socket; 34, elastic buffer; 40, fixture assembly; 41, base; 42, magnetic part; 43, circumferential pressing mechanism; 44, heating module; 45, positioning assembly; 46, pressing plate; 461, lifting lug; 462, fixed pressing block; 463, floating pressing block; 50, welding robot. Detailed implementation mode

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] For easy understanding, the specific structure and working mode of the present invention are further described as follows in combination with the accompanying drawings:

[0034] The specific structure of the present invention is shown in Figure 1-8 As shown, its main structure includes a welding fixture including a grasping mechanism and a welding system including the welding fixture. Among them:

[0035] 1. Grasping mechanism

[0036] The grasping mechanism is used to grasp the pressing plate 46 in the welding fixture. Among them, a T-shaped lifting lug 461 is fixed on the top surface of the pressing plate 46. The lifting lug 461 is a T-shaped structure formed by at least a cap part and a vertical part. By grasping the cap part of the lifting lug 461 with the grasping assembly 30 in the grasping mechanism, the transfer of the pressing plate 46 can be realized.

[0037] Specifically, as Figure 1-7As shown in the figure, the grasping assembly 30 includes a mounting plate 31, and a linear travel assembly 32 is mounted on the mounting plate 31; a power end of the linear travel assembly 32 is connected to a gripping plate 33 that can reciprocate radially along the lifting lug 461. An insertion opening 332 for the vertical portion of the lifting lug 461 to slide into is provided at the advancing end of the gripping plate 33 moving towards the lifting lug 461. A groove 331 is recessed in the upper part of the top of the gripping plate 33 above the insertion opening 332, and the contour of the groove wall of the groove 331 is adapted to the outer peripheral contour of the cap portion of the lifting lug 461. During use, the grasping assembly 30 first moves below the cap portion of the lifting lug 461, and the power end of the linear travel assembly 32 drives the gripping plate 33 to move towards the lifting lug 461, so that the insertion opening 332 is sleeved on the outer periphery of the vertical portion of the lifting lug 461 until the cap portion of the lifting lug 461 is directly above the groove 331; thereafter, when the grasping assembly 30 moves upward to lift the lifting lug 461, the gripping plate 33 will move upward and the cap portion of the lifting lug 461 will slide into the inside of the groove 331 to lift the lifting lug 461 upward. Since the contour of the groove wall of the groove 331 is adapted to the outer peripheral contour of the cap portion of the lifting lug 461, in the lifting state of the lifting lug 461, the cap portion of the lifting lug 461 is clamped with the groove wall of the groove 331, which can realize the horizontal limit of the gripping plate 33. Even when the linear travel assembly 32 fails, the gripping plate 33 will not generate horizontal movement and cause the lifting lug 461 to fall, ensuring the stability of the lifting lug 461 during the hoisting process. When unloading the lifting lug 461, it is only necessary to drive the lifting lug 461 downward by the grasping mechanism and place it at the designated position, and then the grasping mechanism continues to move downward until the groove 331 on the gripping plate 33 is misaligned with the cap portion of the lifting lug 461; thereafter, the gripping plate 33 is driven by the linear travel assembly 32 to separate the lifting lug 461 from the groove 331.

[0038] On the above basis, four lifting lugs 461 are arranged in a rectangular array, and four gripping plates 33 are arranged to cooperate with the lifting lugs 461 one by one to ensure the stability of the lifting lugs 461 during the hoisting process.

[0039] In addition, as Figure 4 shown, an elastic buffer 34 is mounted on the bottom of the mounting plate 31, which not only elastically buffers the downward movement process of the grasping mechanism, but also can apply a downward elastic pressing force to the pressing plate 46 after the pressing plate 46 of the welding fixture is hoisted to the designated position, assisting the pressing plate 46 to achieve stable pressing operation.

[0040] 2. Welding Fixture

[0041] This welding fixture applies the above-mentioned grasping mechanism. As Figure 5-8As shown in the figure, the welding fixture includes a fixture assembly 40, which includes a base 41 for loading the product and a pressing plate 46 located directly above the base 41 and pressing the product onto the base 41. The pressing plate 46 is fixed to the bottom of the lifting lug 461. A circumferential pressing mechanism 43 is provided on the base 41. The circumferential pressing mechanism 43 includes a first pressing part for pressing the product downward and a second pressing part for pressing the pressing plate 46 downward. Initially, the grasping mechanism hoists the pressing plate 46 to separate it from the base 41. The product is transported onto the base 41 by manual labor or a transfer cart and is tightly fixed by the first pressing part on the circumferential pressing mechanism 43. Thereafter, the grasping mechanism transports the pressing plate 46 to the upper surface of the product and tightly fixes it by the second pressing part, thereby realizing double locking and fixing of the product, ensuring stable abutment between the parts of the product to be welded (the water-cooled plate and the frame), so as to facilitate stable welding operation of the product.

[0042] On the above basis, as Figure 6 shown, a magnetic part 42 capable of magnetic attraction cooperation with the pressing plate 46 is provided on the base 41, which can assist in fixing between the pressing plate 46 and the base 41.

[0043] In addition, as Figure 6 shown, a heating module 44 is installed on the base 41. The product is heated by the heating module 44, and the characteristic of thermal expansion is used to offset part of the shrinkage caused by welding, ensuring the flatness of the product after welding.

[0044] In addition, as Figure 6 shown, a positioning assembly 45 for positioning the installation position of the product is installed on the base 41 to ensure rapid positioning and placement of the product on the base 41. Specifically, the positioning assembly 45 can be a baffle matching the outer edge of the product, or a positioning pin inserted and matched with a specific concave part of the product, or a form including both a baffle and a positioning pin, as long as it can realize product positioning.

[0045] On the above basis, as Figure 5 shown, fixed pressing blocks 462 and floating pressing blocks 463 are arranged on the outer periphery of the pressing plate 46. The fixed pressing blocks 462 are used to roughly press between the two parts of the product to be welded to each other (the water-cooled plate and the frame). In addition, due to the uneven gap between the two parts after gluing during the gluing operation with insufficient gluing accuracy, the floating pressing blocks 463 are provided to press the gap after gluing.

[0046] On the above basis, as Figure 8As shown in the figure, it further includes a truss 10 and a lifting assembly 20 mounted on the truss 10 for driving the grasping assembly 30 to move up and down. After the product is fixed on the base 41, the lifting assembly 20 drives the grasping assembly 30 to move downward to press the pressing plate 46 above the product. After that, the grasping assembly 30 is separated from the pressing plate 46, and the lifting assembly 20 drives the grasping assembly 30 to move upward to facilitate the welding operation on the product. After welding is completed, the lifting assembly 20 drives the grasping assembly 30 to move downward again and grabs the pressing plate 46 to release the pressing and fixing of the product. At this time, the welded product can be disassembled.

[0047] In addition, as shown in combination with Figure 1 and Figure 7 the power end of the lifting assembly 20 is connected to the mounting plate 31, and an adjusting assembly 21 for adjusting the position of the mounting plate 31 along the X-axis and Y-axis is provided between the power end of the lifting assembly 20 and the mounting plate 31, so that the socket 332 on the grasping plate 33 can be accurately aligned with the lifting lug 461.

[0048] 3. Welding system

[0049] This welding system applies the above-mentioned welding fixture. It includes a welding robot 50, and the fixture assembly 40 is arranged in two groups symmetrically on both sides of the welding robot 50.

[0050] This welding system adopts a double-welding-station layout. During operation, a handling robot in the production line places the product on the base 41 and presses and fixes the product through the first pressing part on the circumferential pressing mechanism 43. After that, the lifting assembly 20 on the truss 10 drives the grasping assembly 30 to grab the pressing plate 46, and elastically buffers through the elastic buffer 34 so that the pressing plate 46 softly contacts and falls on the product. In addition, the magnetic part 42 on the base 41 attracts and tightens the pressing plate 46, and fixes the pressing plate 46 through the second pressing part on the circumferential pressing mechanism 43. After that, the grasping assembly 30 is separated from the lifting lug 461, and the lifting assembly 20 drives the grasping assembly 30 to rise to the highest position. After that, the welding robot 50 performs welding. When the welding robot 50 welds at one welding station, the actions of the first welding station are repeated at the other welding station, so that the welding robot 50 can alternately weld in the double stations, improving the efficiency of the entire welding system.

[0051] Of course, for those skilled in the art, the present utility model is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0052] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0053] The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A lug grabbing mechanism, characterized in that, An earring (461) including at least a T-shaped structure formed by combining a cap portion and a vertical portion, and a grasping assembly (30) for grasping and transporting the earring (461). The grasping assembly (30) includes a mounting plate (31), on which a linear travel assembly (32) is mounted. The power end of the linear travel assembly (32) is connected to a gripping plate (33) that can reciprocate radially with respect to the earring (461). A socket (332) for the vertical portion to slide into is provided at the advancing end of the gripping plate (33) moving towards the earring (461), and a groove (331) is recessed in the upper part of the socket (332). The groove wall profile of the groove (331) is adapted to the outer peripheral profile of the cap portion to prevent the cap portion in the lifting state from generating displacement actions along the moving direction of the gripping plate (33).

2. The lug grasping mechanism according to claim 1, characterized in that, The four earrings (461) are arranged in a rectangular array, and the four gripping plates (33) are arranged to cooperate with the earrings (461) one by one.

3. The lug grasping mechanism according to claim 1, wherein, An elastic buffer (34) is mounted at the bottom of the mounting plate (31).

4. Welding fixture, the welding fixture applying a lug grabbing mechanism as described in any one of claims 1-3, characterized in that, A fixture assembly (40) is included. The fixture assembly (40) includes a base (41) for loading a product and a pressing plate (46) located directly above the base (41) and pressing the product onto the base (41). The pressing plate (46) is fixed to the bottom of the earring (461). A circumferential pressing mechanism (43) is provided on the base (41), and the circumferential pressing mechanism (43) includes a first pressing portion for pressing the product downward and a second pressing portion for pressing the pressing plate (46) downward.

5. The welding fixture according to claim 4, wherein, A magnetic attraction member (42) capable of magnetically attracting and cooperating with the pressing plate (46) is provided on the base (41).

6. The welding jig according to claim 5, characterized in that, A heating module (44) is mounted on the base (41).

7. The welding jig according to claim 6, wherein, A positioning assembly (45) for positioning the installation position of the product is mounted on the base (41).

8. The welding jig according to claim 7, characterized in that, Fixed pressing blocks (462) and floating pressing blocks (463) are arranged on the outer periphery of the pressing plate (46).

9. The welding jig according to claim 8, wherein, It further includes a truss (10) and a lifting assembly (20) mounted on the truss (10) for driving the grasping assembly (30) to perform lifting motion. The power end of the lifting assembly (20) is connected to the mounting plate (31), and an adjustment assembly (21) for adjusting the position of the mounting plate (31) along the X-axis and Y-axis is provided between the power end of the lifting assembly (20) and the mounting plate (31).

10. A welding system, which applies the welding fixture according to any one of claims 4-9, characterized in that, A welding robot (50) is included, and the fixture assemblies (40) are arranged in two groups symmetrically on both sides of the welding robot (50).

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