Feeding tool and feeding device for small plate tailored blank laser welding

Abstract

The invention discloses a feeding tool and a feeding device for small plate tailored blank laser welding, the feeding tool comprises a material bearing table, a suction cup rod is arranged above the material bearing table, through cooperative use of the suction cup rod, a suction cup support, a small suction cup, an electric push rod and a movable plate, the small plate can be sucked and connected through the small suction cup, and the small plate can be connected through the electric push rod. Meanwhile, the small suction cups are in special shape design, the edges of the small plates can be connected in an adsorption mode as much as possible, and then the small plates can be completely placed on a welding station when being fed, so that the feeding precision and the welding quality are further improved, and the production efficiency is improved. Through cooperative use of the rack, the mounting shell, the translation assembly, the electric telescopic rod, the bearing frame and the positioning plate, a small suction cup can do reciprocating motion in the horizontal direction and the vertical direction, so that feeding operation of small plates can be achieved, manual participation is reduced in the whole process, the automation degree is further improved, and the working efficiency is improved. And therefore, the feeding efficiency of the small plates is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of laser welding of plate parts, and in particular relates to a feeding tool and a feeding device for laser welding of small plate parts. Background Art

[0002] Laser welding of panels is an efficient and high-quality welding method. It uses a high-energy-density laser beam as a heat source to locally heat the parent material, melt the parent material and connect them together. During the laser welding process, the laser beam is focused into a very small spot through a focusing lens and irradiated on the panel to be welded, causing the panel to partially melt to form a molten pool. As the laser beam moves, the molten pool gradually solidifies to form a weld, thereby realizing the welding of the panels. Laser welding can achieve high-precision welding. By controlling the focal position and power of the laser beam, the welding depth and width can be accurately controlled to meet the requirements of high-precision welding. In modern manufacturing, laser welding technology for small panels has become a key process, especially in the fields of automobile manufacturing, aerospace, electronic communications, etc. It shows extremely high application value. With the advancement of science and technology, the manufacturing precision and welding quality requirements of small panels are constantly improving, which puts forward more stringent requirements on the feeding link of laser welding.

[0003] In the prior art, circular suction cups are usually used to adsorb and load panels. However, for small panels with smaller sizes, the circular suction cups have a larger coverage area for the small panels, which easily leads to the problem of not being able to accurately place the small panels at the welding station. For this reason, we propose a loading tool and loading device for laser welding of small panels to solve the problems existing in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a loading tool and a loading device for laser welding of small panels, so as to solve the problem mentioned in the above background technology that circular suction cups are usually used to adsorb and load panels in the prior art, but for small panels with smaller size, the circular suction cups have a larger coverage area for the small panels, which easily makes it impossible to accurately place the small panels at the welding station.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] On the one hand, a loading tool for laser welding of small panels is provided, including a material receiving table, a suction cup rod is arranged above the material receiving table, the bottom of the suction cup rod is connected to a suction cup bracket, a small suction cup is fixed to one end of the suction cup bracket by a fixing screw, an installation groove is opened inside the suction cup rod, an electric push rod is fixedly connected to the inner wall of the installation groove, one end of the telescopic end of the electric push rod is fixedly connected to a movable plate, and the bottom of the movable plate is fixedly connected to the suction cup bracket.

[0007] Preferably, a through slot adapted to the movable plate is formed on the suction cup rod, and the movable plate is slidably connected to the inside of the through slot.

[0008] Preferably, a vent hole is provided on one side of the small suction cup, and the vent hole is connected to the interior of the small suction cup.

[0009] Preferably, an air hole is provided inside the suction cup bracket, and the air hole is connected to the vent hole.

[0010] Preferably, the air hole is fixedly connected to a flexible tube, one end of the flexible tube is fixedly connected to a negative pressure tube, and the outer wall of the negative pressure tube is fixedly connected to a vacuum pump through a pipeline.

[0011] On the other hand, a feeding device for laser welding of small panels is provided, including a feeding tool for laser welding of small panels, and also including a frame, a mounting shell is fixedly installed on the inner top of the frame, a translation assembly for horizontally moving a small suction cup is arranged inside the mounting shell, the moving end of the translation assembly is connected to two groups of electric telescopic rods, the bottom ends of the telescopic ends of the two groups of electric telescopic rods are fixedly connected to a supporting frame, one side of the supporting frame is fixedly connected to a positioning plate, the suction cup rod is fixedly connected to the bottom of the positioning plate, the negative pressure pipe is fixedly connected to a side wall of one side of the positioning plate, and the vacuum pump is fixedly installed on the bottom of the supporting frame.

[0012] Preferably, the translation assembly includes a ball screw, one end of which is rotatably mounted on an inner wall of one side of the mounting shell, the other end of the ball screw is connected to a driving motor, and a translation block is threadedly connected to the outer wall of the ball screw, and the two groups of electric telescopic rods are fixedly mounted on the bottom of the translation block.

[0013] Preferably, guide grooves are respectively provided on both side walls of the mounting shell, guide blocks adapted to the guide grooves are respectively fixedly connected to both side walls of the translation block, and two groups of guide blocks are respectively slidably connected to the inside of the two groups of guide grooves.

[0014] Preferably, the drive motor is fixedly mounted on an inner wall of one side of the mounting shell, and one end of the output shaft of the drive motor is fixedly connected to one end of the ball screw.

[0015] Preferably, a small plate is provided on the top of the material receiving platform, the top of the small plate has an adsorption area, and the small suction cup is adsorbed and connected to the adsorption area.

[0016] Technical effects and advantages of the present invention: Compared with the prior art, the present invention provides a loading tool and a loading device for laser welding of small panels, which have the following advantages:

[0017] 1. The present invention arranges a suction cup rod, a suction cup bracket, a small suction cup, an electric push rod and a movable plate for coordinated use, and can use the small suction cup to adsorb and connect small panels. At the same time, the small suction cup is designed with a special shape, and can adsorb and connect the edges of the small panels as much as possible. When the small panels are subsequently loaded, they can be completely placed in the welding station, which is beneficial to further improve the loading accuracy and welding quality.

[0018] 2. The present invention can make the small suction cup reciprocate in the horizontal and vertical directions by setting up a frame, a mounting shell, a translation assembly, an electric telescopic rod, a supporting bracket and a positioning plate, thereby realizing the loading operation of small panels. The whole process reduces manual participation, which is conducive to further improving the degree of automation and thus improving the loading efficiency of small panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the shaft side of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the loading tooling assembly of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the feeding tool of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the suction cup bracket and the small suction cup of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the translation assembly of the present invention.

[0025] In the figure: 1. Material receiving platform; 2. Suction cup rod; 3. Suction cup bracket; 4. Small suction cup; 5. Mounting slot; 6. Electric push rod; 7. Movable plate; 8. Through slot; 9. Vent hole; 10. Vent hole; 11. Flexible tube; 12. Negative pressure tube; 13. Vacuum pump; 14. Rack; 15. Mounting shell; 16. Translation assembly; 1601. Ball screw; 1602. Driving motor; 1603. Translation block; 1604. Guide slot; 1605. Guide block; 17. Electric telescopic rod; 18. Support bracket; 19. Positioning plate; 20. Small panel; 21. Adsorption area. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] The present invention provides Figure 1-6 A loading tool for laser welding of small panels is shown, including a receiving platform 1, a suction cup rod 2 is arranged above the receiving platform 1, the bottom of the suction cup rod 2 is connected to a suction cup bracket 3, one end of the suction cup bracket 3 is fixed with a small suction cup 4 by a fixing screw bolt, and the suction cup rod 2 and the suction cup bracket 3 play a role in positioning the small suction cup 4.

[0028] An installation groove 5 is opened inside the suction cup rod 2, and an electric push rod 6 is fixedly connected to the inner wall of the installation groove 5. By setting the installation groove 5, the electric push rod 6 is given a position, which facilitates the installation of the electric push rod 6. One end of the telescopic end of the electric push rod 6 is fixedly connected with a movable plate 7. The movable plate 7 can be driven to move by the telescopic end of the electric push rod 6, thereby driving the suction cup rod 2 to move, and then driving the suction cup bracket 3 to move, thereby driving the small suction cup 4 to move, which is beneficial to further improve the feeding accuracy of the small panel 20.

[0029] The bottom of the movable plate 7 is fixedly connected to the suction cup bracket 3. By setting the suction cup rod 2, the suction cup bracket 3, the small suction cup 4, the electric push rod 6 and the movable plate 7, the small panel 20 can be adsorbed and connected through the small suction cup 4. At the same time, the small suction cup is designed with a special shape, which can adsorb and connect the edge of the small panel 20 as much as possible. When the small panel 20 is subsequently loaded, it can be completely placed in the welding station, which is conducive to further improving the loading accuracy and welding quality.

[0030] Further, such as Figure 4 As shown, a through slot 8 adapted to the movable plate 7 is provided on the suction cup rod 2, and the movable plate 7 is slidably connected to the inside of the through slot 8. By providing the through slot 8, the movable plate 7 is limited, so that the suction cup bracket 3 can move more stably, thereby improving the stability of the small suction cup 4;

[0031] In a further preferred embodiment, Figure 5 As shown, a vent hole 9 is provided on one side of the small suction cup 4, and the vent hole 9 is connected to the inside of the small suction cup 4. A negative pressure environment can be generated inside the small suction cup 4 by using a vacuum pump 13 in conjunction with the vent hole 9, so that the small plate 20 can be adsorbed and taken out;

[0032] Preferably, Figure 5 As shown, an air hole 10 is provided inside the suction cup bracket 3, and the air hole 10 is connected with the vent hole 9. By connecting the air hole 10 with the vent hole 9, it is further convenient for the vacuum pump 13 to generate a negative pressure environment inside the small suction cup 4;

[0033] Further, such as Figure 3 As shown, the air hole 10 is fixedly connected to a flexible tube 11, one end of the flexible tube 11 is fixedly connected to a negative pressure tube 12, and the outer wall of the negative pressure tube 12 is fixedly connected to a vacuum pump 13 through a pipeline. When selecting the model of the vacuum pump 13 used in the loading tooling for laser welding of small panels, multiple factors need to be considered, including the performance parameters of the vacuum pump 13 (such as pumping rate, ultimate vacuum degree, etc.), the working environment (such as temperature, humidity, corrosive gases, etc.), and specific application requirements (such as whether continuous or intermittent operation is required, whether movement is required, etc.).

[0034] The rotary vane vacuum pump is a common type of vacuum pump with the advantages of simple structure, easy operation and low maintenance cost. Its working principle is to extract air through the rotation of the rotary vane in the pump chamber, thereby achieving the purpose of reducing pressure.

[0035] For the loading tooling for laser welding of small panels, a rotary vane vacuum pump is a good choice. Fujiwara rotary vane vacuum pump can be selected. The brand of rotary vane vacuum pump has a high reputation and good reputation in the market, stable and reliable performance, suitable for a variety of working environments, such as PCV-2M, PCV-4M, PCV-2MSV, PCV-4MSV and other models, you can choose the appropriate pumping rate and ultimate vacuum degree according to specific needs.

[0036] By setting up the vacuum pump 13, the negative pressure tube 12, the flexible tube 11, the air hole 10 and the vent hole 9 for coordinated use, by starting the vacuum pump 13, a negative pressure environment can be generated inside the negative pressure tube 12, and then a negative pressure environment can be generated inside the small suction cup 4 through the flexible tube 11, the air hole 10 and the vent hole 9, so as to realize the material taking operation of the small plate 20 through the small suction cup 4;

[0037] On the other hand, the present invention proposes a feeding device for laser welding of small panels, including a feeding tool for laser welding of small panels, and also includes a frame 14, a mounting shell 15 is fixedly installed on the inner top of the frame 14, and a translation component 16 for horizontally moving the small suction cup 4 is arranged inside the mounting shell 15.

[0038] The moving end of the translation assembly 16 is connected to two sets of electric telescopic rods 17, and the bottom ends of the telescopic ends of the two sets of electric telescopic rods 17 are fixedly connected to a support frame 18. For the loading device used for laser welding of small panels, the material selection of the support frame 18 is very important because it needs to bear the weight of the panels to be welded and remain stable during the laser welding process.

[0039] The support frame 18 can be made of stainless steel or aluminum alloy. Stainless steel has the characteristics of high strength, corrosion resistance and high temperature resistance, and is very suitable for manufacturing the support frame. It can withstand the high temperature generated by laser welding for a long time without deformation, and will not absorb or reflect the laser beam too much, thereby ensuring the welding quality; aluminum alloy has a light weight and good corrosion resistance, and also has a certain strength.

[0040] In some cases, aluminum alloy can be used as an economical and effective choice, especially when the support frame needs to be frequently moved or adjusted. A positioning plate 19 is fixedly connected to one side of the support frame 18, the suction cup rod 2 is fixedly connected to the bottom of the positioning plate 19, the negative pressure tube 12 is fixedly connected to one side wall of the positioning plate 19, and the vacuum pump 13 is fixedly installed at the bottom of the support frame 18. By setting the frame 14, the mounting shell 15, the translation assembly 16, the electric telescopic rod 17, the support frame 18 and the positioning plate 19, the small suction cup 4 can be reciprocated in the horizontal and vertical directions, so as to realize the feeding operation of the small plate 20. The whole process reduces manual participation, which is conducive to further improving the degree of automation, thereby improving the feeding efficiency of the small plate 20;

[0041] It is worth mentioning that panel laser welding is an application of laser welding technology in panel manufacturing. Its working principle is mainly based on the energy conversion and focusing characteristics of the laser beam. The key component of the laser welding machine is the laser source. The laser beam it generates has high energy density and beam quality, which can quickly heat the workpiece and achieve high-quality welding.

[0042] Common laser sources include gas lasers (such as CO2 lasers), fiber lasers, solid lasers (such as YAG lasers), etc. The optical system of the laser welding machine includes components such as collimators, reflectors and focusing mirrors, which are used to control the transmission and focusing of the laser beam. The collimator and reflector guide the laser beam to the workpiece, while the focusing mirror reduces the diameter of the laser beam to a very small size, thereby increasing the power density of laser welding. When the laser beam is irradiated to the surface of the workpiece, it will be absorbed by the workpiece material and converted into heat energy, causing the workpiece to heat up locally until it melts or reaches the temperature required for welding. As the laser beam moves, the molten pool will also move with it, leaving a complete weld on its path.

[0043] Laser welding can achieve high-speed and high-precision welding, with small and beautiful welds and firm welding. Laser welding can reduce the heat input to the minimum required amount, the metallographic change range of the heat-affected zone is small, and the deformation caused by heat conduction is also minimal. Due to the low heat input of laser welding, the welding deformation is small, which is suitable for welding plates with high deformation requirements. Laser welding has a fast speed and can greatly improve production efficiency. Laser welding can weld a variety of materials, including metals, non-metals and heterogeneous materials. Laser welding has been widely used in the automotive industry, mainly for the assembly and connection of white body stamping parts, such as roof cover laser welding, trunk lid laser brazing and frame laser welding.

[0044] Laser welding can improve the strength of the vehicle body and solve the problem that some parts are difficult to implement conventional resistance spot welding. Laser welding also plays an important role in the aerospace field. Aerospace has extremely high requirements for materials, which need to have high strength, high toughness, corrosion resistance and other properties, and laser welding can meet these requirements.

[0045] In this embodiment, if Figure 6 As shown, the translation assembly 16 includes a ball screw 1601, one end of the ball screw 1601 is rotatably mounted on the inner wall of one side of the mounting shell 15, the other end of the ball screw 1601 is connected to a drive motor 1602, and a translation block 1603 is threadedly connected to the outer wall of the ball screw 1601. Both sets of electric telescopic rods 17 are fixedly mounted on the bottom of the translation block 1603. By setting the ball screw 1601, the drive motor 1602 and the translation block 1603 for coordinated use, the small suction cup 4 is adjusted in the horizontal direction.

[0046] Further, such as Figure 6 As shown, guide grooves 1604 are respectively provided on the side walls of the mounting shell 15, and guide blocks 1605 adapted to the guide grooves 1604 are respectively fixedly connected to the side walls of the translation block 1603. The two groups of guide blocks 1605 are respectively slidably connected to the inside of the two groups of guide grooves 1604. By setting the guide grooves 1604 and the guide blocks 1605 in coordination, the translation block 1603 is limited, making its movement process more stable, which is conducive to further improving the stability of the device.

[0047] It is worth noting that if Figure 6As shown, the drive motor 1602 is fixedly mounted on the inner wall of one side of the mounting shell 15, one end of the output shaft of the drive motor 1602 is fixedly connected to one end of the ball screw 1601, and the drive motor 1602 is configured as a forward and reverse stepping motor. The stepping motor is an actuator that converts an electrical pulse signal into an angular displacement or a linear displacement; its greatest feature is that it can simply achieve high-precision positioning control; when the stepping motor receives a pulse signal, it can rotate at a fixed angle according to the number of input pulses, thereby obtaining flexible angle control (position control), and can obtain a rotation speed proportional to the frequency (frequency) of the pulse signal;

[0048] Because of its superior acceleration performance, the stepper motor can achieve instantaneous start, stop, forward and reverse fast and frequent positioning actions. This feature enables the stepper motor to quickly respond to control signals in the translation component to achieve fast movement and precise positioning of the small suction cup. In the laser welding process, this fast response capability helps to improve production efficiency and reduce production time waste caused by movement delays. The control system of the stepper motor is simple in structure and does not require speed sensors (such as ENCODER, speed generator) and position sensors (SENSOR). The speed and position can be controlled by the input pulse wave. This open-loop control method makes the application of stepper motors in the feeding device for laser welding of small panels easier to use, reducing the complexity and cost of the system.

[0049] It should be noted that if Figure 1 As shown, a small panel 20 is arranged on the top of the material receiving table 1. The top of the small panel 20 has an adsorption area 21. The small suction cup 4 is adsorbed and connected to the adsorption area 21. The adsorption area 21 is located near the edge of the small panel 20. When the small suction cup 4 adsorbs the small panel 20, there is a large free space at the front end of the small panel 20. Therefore, when the small panel 20 is loaded, the small panel 20 can be easily placed on the welding station of the welding device, which is beneficial to further improve the flexibility of the device.

[0050] Working principle: When the present invention is used, the normal position of the small suction cup 4 is located directly above the small plate 20. The telescopic ends of the two sets of electric telescopic rods 17 are first pushed downward to drive the support frame 18 to move downward, thereby driving the small suction cup 4 to move downward. When the lower surface of the small suction cup 4 is in contact with the adsorption area 21 on the small plate 20, the vacuum pump 13 is started to generate a negative pressure environment inside the negative pressure tube 12, and then a negative pressure environment is generated inside the small suction cup 4 through the flexible tube 11, the air hole 10 and the vent hole 9, so as to realize the material picking operation of the small plate 20 through the small suction cup 4. At the same time, the small suction cup 4 adopts a special shape design to maximize the edge of the small plate 20. After the small panel 20 is adsorbed and connected, it can be completely placed in the welding station when it is loaded, which is beneficial to further improve the loading accuracy and welding quality. Then, the output shaft of the driving motor 1602 can drive the ball screw 1601 to rotate forward or reverse, thereby driving the translation block 1603 to reciprocate along the axial direction of the ball screw 1601, and then driving the support bracket 18 to move horizontally, so as to achieve the effect of horizontal movement of the adsorbed small panel 20, and then the small panel 20 can be loaded. The whole process reduces manual participation, which is beneficial to further improve the degree of automation, thereby improving the loading efficiency of small panels.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A feeding tool for laser welding of small panels, characterized in that: include: A material receiving platform (1), wherein a suction cup rod (2) is arranged above the material receiving platform (1), a suction cup bracket (3) is connected to the bottom of the suction cup rod (2), and a small suction cup (4) is fixed to one end of the suction cup bracket (3) by means of a fixing screw bolt; The suction cup rod (2) is provided with a mounting groove (5) inside, an electric push rod (6) is fixedly connected to the inner wall of the mounting groove (5), one end of the telescopic end of the electric push rod (6) is fixedly connected to a movable plate (7), and the bottom of the movable plate (7) is fixedly connected to the suction cup bracket (3).

2. A loading tool for laser welding of small panels according to claim 1, characterized in that: The sucker rod (2) is provided with a through slot (8) adapted to the movable plate (7), and the movable plate (7) is slidably connected to the inside of the through slot (8).

3. The feeding tool for laser welding of small panels according to claim 1, characterized in that: A vent hole (9) is provided on one side of the small suction cup (4), and the vent hole (9) is communicated with the interior of the small suction cup (4).

4. The feeding tool for laser welding of small panels according to claim 3 is characterized by: An air hole (10) is provided inside the suction cup bracket (3), and the air hole (10) is communicated with the vent hole (9).

5. The feeding tool for laser welding of small panels according to claim 4, characterized in that: The air hole (10) is fixedly connected to a flexible tube (11), one end of the flexible tube (11) is fixedly connected to a negative pressure tube (12), and the outer wall of the negative pressure tube (12) is fixedly connected to a vacuum pump (13) via a pipeline.

6. A feeding device for laser welding of small panels, comprising the feeding tool for laser welding of small panels according to any one of claims 1 to 5, characterized in that: The invention also comprises a frame (14), a mounting shell (15) is fixedly mounted on the inner top of the frame (14), a translation assembly (16) for horizontally moving the small suction cup (4) is arranged inside the mounting shell (15), the moving end of the translation assembly (16) is connected to two groups of electric telescopic rods (17), the bottom ends of the telescopic ends of the two groups of electric telescopic rods (17) are fixedly connected to a support frame (18), one side of the support frame (18) is fixedly connected to a positioning plate (19), the suction cup rod (2) is fixedly connected to the bottom of the positioning plate (19), the negative pressure pipe (12) is fixedly connected to a side wall of one side of the positioning plate (19), and the vacuum pump (13) is fixedly mounted on the bottom of the support frame (18).

7. A feeding device for laser welding of small panels according to claim 6, characterized in that: The translation assembly (16) comprises a ball screw (1601), one end of which is rotatably mounted on an inner wall of a side of the mounting shell (15), the other end of which is connected to a driving motor (1602), a translation block (1603) is threadedly connected to the outer wall of the ball screw (1601), and the two sets of electric telescopic rods (17) are fixedly mounted on the bottom of the translation block (1603).

8. The feeding device for laser welding of small panels according to claim 7, characterized in that: The side walls of the mounting shell (15) are respectively provided with guide grooves (1604), and the side walls of the translation block (1603) are respectively fixedly connected with guide blocks (1605) adapted to the guide grooves (1604), and the two groups of guide blocks (1605) are respectively slidably connected to the inside of the two groups of guide grooves (1604).

9. A feeding device for laser welding of small panels according to claim 8, characterized in that: The driving motor (1602) is fixedly mounted on an inner wall of one side of the mounting shell (15), and one end of the output shaft of the driving motor (1602) is fixedly connected to one end of the ball screw (1601).

10. A feeding device for laser welding of small panels according to claim 9, characterized in that: A small plate (20) is arranged on the top of the material receiving platform (1), the top of the small plate (20) has an adsorption area (21), and the small suction cup (4) is adsorbed and connected to the adsorption area (21).

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