Elastic pressing laser welding tool and manipulator thereof

Abstract

The utility model discloses an elastic compression laser welding tool and a manipulator thereof, and belongs to the technical field of equipment for laser welding, the laser welding tool comprises a connecting plate, and the connecting plate is provided with a laser welding head and a pressurizing cylinder; the telescopic end of the pressurizing air cylinder is connected with a movable plate, an elastic guide pressing assembly is arranged on the movable plate, a pressing plate assembly is connected to the elastic guide pressing assembly, and balls are arranged on the pressing plate assembly in a rolling mode. According to the structure, pressing force is provided for the pressing plate assembly through the elastic guide pressing assembly and the pressurizing air cylinder, so that the pressing plate assembly can press and fit the to-be-welded workpiece, the laser welding head can adjust the welding focal length in the moving process of the movable plate, in addition, the pressing plate assembly can move along the welding face of the to-be-welded workpiece through the balls, and the welding precision is improved. The pressing plate assembly is simple in structure, smooth in movement and free of damage to the surface of the workpiece to be welded, the pressing plate assembly can be bent at any angle in the moving process, and therefore the requirement for continuous pressing and welding of the workpiece to be welded in a special shape is met, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to an elastic compression laser welding tool and a manipulator thereof. Background Art

[0002] Laser welding technology offers the advantages of high welding speed, low heat input, a small heat-affected zone, minimal deformation, and excellent weld quality, making it easy to automate the welding process. Currently, common laser welding tooling requires pre-compacting the workpieces, but this process is time-consuming and inefficient.

[0003] To this end, relevant technical personnel have conducted research and development. For example, the invention patent with Chinese patent number CN202111132852.2 discloses a laser rolling welding device, which includes a machine tool connecting plate, a sliding plate, a pressure wheel assembly, a pre-tensioning wheel assembly and a laser head welding system; the sliding plate is slidably installed on the machine tool connecting plate, the pressure wheel assembly includes a pressure transmission system, a pressure wheel bracket and a pressure wheel, the pressure transmission system includes a linear ball guide sleeve, a bracket connecting rod and a compression spring, the linear ball guide sleeve is slidably installed on the sliding plate, the bracket connecting rod passes through the linear ball guide sleeve and is connected to the pressure wheel bracket, a compression spring is sleeved on the outside of the bracket connecting rod, the pressure wheel is rotatably installed on the pressure wheel bracket, the pre-tensioning wheel assembly includes a pre-tensioning pressure wheel bracket and a pre-tensioning wheel; the laser head welding system includes a laser emission assembly and a laser head back support. The above device realizes compression during welding without pre-pressing the workpiece to be welded in advance, which can reduce the time of the entire process. However, the clamping wheel can only roll in a straight line and cannot turn at any angle. It cannot continuously clamp workpieces with special shapes, resulting in low production efficiency. In addition, the laser emission component is not assembled in a fixed manner, and it is easy to be displaced due to vibration during operation, resulting in the workpiece being unable to be welded at the specified position, resulting in a low yield rate.

[0004] Therefore, further improvement is necessary. Utility Model Content

[0005] The utility model aims to provide an elastic compression laser welding tool and a manipulator thereof, so as to overcome the deficiencies in the prior art.

[0006] An elastic compression laser welding tool designed for this purpose includes a connecting plate, on which a laser welding head and a booster cylinder are fixedly installed; the telescopic end of the booster cylinder is connected to a movable plate, on which an elastic guide and clamping assembly is provided, and the elastic guide and clamping assembly is connected to a pressure plate assembly, on which balls are rolled.

[0007] The connecting plate is provided with a connecting plate through hole and a welding head protective cover; the welding head protective cover is fixedly arranged on one side of the connecting plate, and its opening is connected to the connecting plate through hole; the laser welding head is passed through the connecting plate through hole and is at least partially located in the welding head protective cover.

[0008] At least two boost cylinders are provided, and the at least two boost cylinders are respectively fixedly provided on the other side surface of the connecting plate and are evenly distributed in a ring shape with the through hole of the connecting plate as the center.

[0009] The movable plate is provided with a movable plate through hole and an assembly portion; the movable plate through hole and the connecting plate through hole are arranged on the same axis; the assembly portion is located outside the movable plate through hole; the telescopic end of the booster cylinder is cooperatively connected with the assembly portion.

[0010] The elastic guide clamping assembly includes a fixed seat, which is fixedly arranged on the movable plate and has an elastic member arranged thereon. The fixed seat is connected to a movable guide member through the elastic member, and the movable guide member is elastically retracted on the fixed seat through the elastic member.

[0011] The elastic extension and retraction direction of the movable guide is the same as the movable direction of the retractable end of the booster cylinder.

[0012] The movable plate is also fixedly provided with a fixing plate, and the fixing plate is provided with a fixing plate through hole corresponding to the through hole of the movable plate; a plurality of fixing seats are provided, and the plurality of fixing seats are respectively fixed on the fixing plate and are evenly distributed in a ring shape with the through hole of the fixing plate as the center, and the plurality of fixing seats are fixed to the movable plate through the fixing plate.

[0013] The pressure plate assembly includes an external pressure assembly plate and an external pressure plate; one side of the external pressure assembly plate is fixedly matched with the external pressure plate, and a rolling cavity is formed between the two; the ball is arranged to roll in the rolling cavity, and the outer end of the ball at least partially extends out of the rolling cavity; the other side of the external pressure assembly plate is fixedly connected to the movable guide.

[0014] The external pressure assembly plate and the external pressure plate are respectively provided with pressure plate through holes; the connecting plate through hole, the movable plate through hole, the fixed plate through hole and the pressure plate through hole are arranged on the same axis; the outer periphery of the external pressure plate is provided with a flange.

[0015] A robot comprises the above-mentioned elastic pressure laser welding tooling, wherein the robot is a six-axis robot; a reinforcing plate is fixedly provided on the connecting plate, an inclined portion is provided on the reinforcing plate, and a tooling plate is fixedly connected to the tooling plate in an inclined manner through the inclined portion, and the tooling plate is fixedly connected to the six-axis robot.

[0016] The utility model improves the above-mentioned structure and utilizes an elastically guided clamping assembly to provide a first section of clamping force to the pressure plate assembly. If the clamping force is insufficient, the pressure can be increased by a booster cylinder, so that the pressure plate assembly can press and fit the workpieces to be welded, thereby improving the fit between the workpieces to be welded. Moreover, the laser welding head can also adjust the welding focal length during the movement of the movable plate to ensure that the welding focal length of the laser welding head is within the optimal range, thereby improving the welding effect of the workpieces to be welded. In addition, the pressure plate assembly can be moved along the welding surface of the workpiece to be welded by a ball bearing. Not only is the movement smooth, but the surface of the workpiece to be welded will not be damaged during the movement, thereby improving the welding yield of the workpiece to be welded. Moreover, the pressure plate assembly can also achieve turning at any angle during the movement, thereby meeting the continuous pressing and welding of workpieces with special shapes, and has a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the assembly structure of the laser welding tool and the robot according to one embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the exploded structure of the laser welding tool and the robot according to one embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the assembly structure of a laser welding tool according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the assembly structure of the laser welding tooling according to one embodiment of the present invention from another perspective.

[0021] Figure 5 This is a schematic diagram of the assembly cross-sectional structure of a laser welding tool according to an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the exploded structure of a laser welding tool according to an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the exploded structure of the laser welding tooling according to one embodiment of the present invention from another perspective. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] See also Figure 1-Figure 7 The elastic force pressing laser welding tool and its manipulator, wherein the elastic force pressing laser welding tool includes a connecting plate 1, on which a laser welding head 2 and a booster cylinder 3 are fixedly arranged; the telescopic end of the booster cylinder 3 is connected to a movable plate 4, on which an elastic guide pressing component is arranged, and the elastic guide pressing component is connected to a pressure plate component, on which a ball 5 is rolled.

[0027] This embodiment uses an elastically guided clamping assembly to provide a first section of clamping force to the pressure plate assembly. If the clamping force is insufficient, the booster cylinder 3 can be used for boosting, so that the pressure plate assembly can press and fit the workpieces to be welded, thereby improving the fit between the workpieces to be welded. Moreover, the laser welding head 2 can also adjust the welding focal length during the movement of the movable plate 4 to ensure that the welding focal length of the laser welding head 2 is within the optimal range, thereby improving the welding effect of the workpieces to be welded. In addition, the pressure plate assembly can be moved along the welding surface of the workpiece to be welded by the ball bearing 5. Not only is the movement smooth, but the surface of the workpiece to be welded will not be damaged during the movement, thereby improving the welding yield of the workpiece to be welded. Moreover, the pressure plate assembly can also achieve turning at any angle during the movement, thereby meeting the continuous pressing and welding of workpieces with special shapes, and has a wide range of uses.

[0028] The manipulator is a six-axis manipulator 18 ; a reinforcing plate 19 is fixedly provided on the connecting plate 1 , an inclined portion 20 is provided on the reinforcing plate 19 , and a tooling plate 21 is fixedly connected to the six-axis manipulator 18 via the inclined portion 20 .

[0029] In this embodiment, the clamping force and moving force of the entire laser welding tooling are provided by the six-axis manipulator 18. Since the laser welding tooling is fixedly connected to the six-axis manipulator 18 at an angle through the tooling plate 21, the six-axis manipulator 18 can better move the laser welding tooling, while also ensuring that the laser welding center of the laser welding head 2 is always at the welding center of the workpiece to be welded.

[0030] As a preferred solution of this embodiment, it may also have the following additional technical features:

[0031] The connecting plate 1 is provided with a connecting plate through hole 6 and a welding head protective cover 7; the welding head protective cover 7 is fixedly arranged on one side of the connecting plate 1, and its opening is connected to the connecting plate through hole 6; the laser welding head 2 is passed through the connecting plate through hole 6 and is at least partially located in the welding head protective cover 7.

[0032] In this embodiment, the welding head protection cover 7 is used to protect the laser welding head 2, thereby preventing the laser welding head 2 from being damaged due to collision during operation.

[0033] At least two boost cylinders 3 are provided, and the at least two boost cylinders 3 are respectively fixedly arranged on the other side of the connecting plate 1 and are evenly distributed in a ring shape with the connecting plate through hole 6 as the center.

[0034] In this embodiment, two booster cylinders 3 are provided and arranged on both sides of the connecting plate through hole 6 , thereby providing a left-right balanced driving force to the movable plate 4 to ensure smooth movement of the movable plate 4 .

[0035] The movable plate 4 is provided with a movable plate through hole 8 and an assembly portion 9; the movable plate through hole 8 and the connecting plate through hole 6 are arranged on the same axis; the assembly portion 9 is located outside the movable plate through hole 8; the telescopic end of the booster cylinder 3 is connected to the assembly portion 9 in a cooperative manner.

[0036] In this embodiment, the assembly portion 9 is an open slot, which is connected to the telescopic end of the boost cylinder 3, has a simple structure, and is easy to assemble and disassemble.

[0037] The elastic guide pressing assembly includes a fixed seat 10, which is fixed on the movable plate 4 and has an elastic member on it. The fixed seat 10 is connected to a movable guide member 11 through the elastic member, and the movable guide member 11 is elastically retracted on the fixed seat 10 through the elastic member.

[0038] In this embodiment, the movable guide member 11 can perform elastic guiding movement on the fixed seat 10, and no shaking or swinging problems will occur during the movement, making the movement of the pressure plate assembly more stable and reliable.

[0039] The direction of elastic extension and retraction of the movable guide 11 is the same as the direction of movement of the telescopic end of the booster cylinder 3. Thus, the movable guide 11 and the booster cylinder 3 can provide driving forces in the same direction, so that the pressure plate assembly can generate multiple strokes and clamping forces.

[0040] A fixing plate 12 is also fixedly provided on the movable plate 4, and a fixing plate through hole 13 is provided on the fixing plate 12 corresponding to the movable plate through hole 8; a plurality of fixing seats 10 are provided, and the plurality of fixing seats 10 are respectively fixed on the fixing plate 12 and are evenly distributed in a ring shape with the fixing plate through hole 13 as the center, and the plurality of fixing seats 10 are fixed on the movable plate 4 through the fixing plate 12.

[0041] In this embodiment, there are four fixing seats 10, all of which are arranged on the fixed plate 12, and are elastically connected to movable guide members 11 by elastic members. The four movable guide members 11 can provide a stable elastic force to the pressure plate assembly, so that the pressure plate assembly can perform a certain floating movement, so that the welded workpiece has a better fit.

[0042] The pressure plate assembly includes an external pressure assembly plate 14 and an external pressure plate 15; one side of the external pressure assembly plate 14 is fixedly matched with the external pressure plate 15, and a rolling cavity is formed between the two; the ball 5 is rolled in the rolling cavity, and the outer end of the ball 5 at least partially extends out of the rolling cavity; the other side of the external pressure assembly plate 14 is fixedly connected to the movable guide 11.

[0043] In this embodiment, the outer pressure plate 15 utilizes the portion of the outer end of the ball 5 extending outside the rolling cavity to roll against the surface of the workpiece to be welded, so that the movement of the outer pressure plate 15 is smoother and the surface of the workpiece to be welded can be avoided from being damaged.

[0044] The external pressure assembly plate 14 and the external pressure plate 15 are respectively provided with pressure plate through holes 16; the connecting plate through hole 6, the movable plate through hole 8, the fixed plate through hole 13 and the pressure plate through hole 16 are arranged on the same axis; the outer periphery of the external pressure plate 15 is provided with a flange 17.

[0045] In this embodiment, the laser beam from the laser welding head 2 is emitted through the connecting plate through-hole 6, the movable plate through-hole 8, the fixed plate through-hole 13, and the pressure plate through-hole 16, and acts on the workpiece to be welded. The flange 17 provides guidance for the movement of the outer pressure plate 15, allowing it to effectively move along the surface of the workpiece to be welded, thereby preventing the outer pressure plate 15 from colliding with the workpiece during movement.

[0046] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. An elastic compression laser welding tool, comprising a connecting plate (1), characterized in that: The connecting plate (1) is fixedly provided with a laser welding head (2) and a boost cylinder (3); the telescopic end of the boost cylinder (3) is connected to a movable plate (4), an elastic guide clamping assembly is provided on the movable plate (4), a pressure plate assembly is connected to the elastic guide clamping assembly, and a ball (5) is rollingly provided on the pressure plate assembly.

2. The elastic force compression laser welding tool according to claim 1, characterized in that: The connecting plate (1) is provided with a connecting plate through hole (6) and a welding head protective cover (7); the welding head protective cover (7) is fixedly arranged on a side surface of the connecting plate (1), and its opening is communicated with the connecting plate through hole (6); the laser welding head (2) is penetrated through the connecting plate through hole (6), and is at least partially located in the welding head protective cover (7).

3. The elastic force compression laser welding tool according to claim 2, characterized in that: At least two of the boost cylinders (3) are provided, and the at least two boost cylinders (3) are respectively fixedly arranged on the other side of the connecting plate (1) and are evenly distributed in a ring shape with the connecting plate through hole (6) as the center.

4. The elastic force compression laser welding tool according to claim 2, characterized in that: The movable plate (4) is provided with a movable plate through hole (8) and an assembly portion (9); the movable plate through hole (8) and the connecting plate through hole (6) are arranged on the same axis; the assembly portion (9) is located outside the movable plate through hole (8); and the telescopic end of the boost cylinder (3) is cooperatively connected to the assembly portion (9).

5. The elastic force pressing laser welding tool according to claim 4, characterized in that: The elastic guide clamping assembly comprises a fixed seat (10), the fixed seat (10) is fixedly arranged on the movable plate (4) and an elastic member is arranged on the fixed seat (10), the fixed seat (10) is connected to a movable guide member (11) via the elastic member, and the movable guide member (11) is elastically retracted on the fixed seat (10) via the elastic member.

6. The elastic force pressing laser welding tool according to claim 5, characterized in that: The elastic expansion and contraction direction of the movable guide member (11) is the same as the movable direction of the expansion and contraction end of the boost cylinder (3).

7. The elastic force compression laser welding tool according to claim 5, characterized in that: A fixing plate (12) is also fixedly arranged on the movable plate (4), and a fixing plate through hole (13) is arranged on the fixing plate (12) corresponding to the movable plate through hole (8); a plurality of fixing seats (10) are arranged, and the plurality of fixing seats (10) are respectively fixed on the fixing plate (12) and are evenly distributed in a ring shape with the fixing plate through hole (13) as the center; the plurality of fixing seats (10) are fixed on the movable plate (4) through the fixing plate (12).

8. The elastic force compression laser welding tool according to claim 7, characterized in that: The pressure plate assembly comprises an external pressure assembly plate (14) and an external pressure plate (15); one side of the external pressure assembly plate (14) is fixedly matched with the external pressure plate (15) to form a rolling cavity between the two; the ball (5) is rollingly arranged in the rolling cavity, and the outer end of the ball (5) at least partially extends out of the rolling cavity; the other side of the external pressure assembly plate (14) is fixedly connected to the movable guide member (11).

9. The elastic force pressing laser welding tool according to claim 8, characterized in that: The external pressure assembly plate (14) and the external pressure plate (15) are respectively provided with pressure plate through holes (16); the connecting plate through hole (6), the movable plate through hole (8), the fixed plate through hole (13), and the pressure plate through hole (16) are arranged on the same axis; and the outer periphery of the external pressure plate (15) is provided with a flange (17).

10. A robot, characterized in that: It comprises the elastic force clamping laser welding tooling as described in any one of claims 1 to 9, wherein the manipulator is a six-axis manipulator (18); a reinforcing plate (19) is fixedly provided on the connecting plate (1), an inclined portion (20) is provided on the reinforcing plate (19), and a tooling plate (21) is obliquely fixedly connected via the inclined portion (20), and the tooling plate (21) is fixedly connected to the six-axis manipulator (18).

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