Workpiece conveying device for laser cutting machine

Abstract

The invention relates to the technical field of workpiece conveying, and particularly discloses a workpiece conveying device for a laser cutting machine, which comprises a moving frame, a mounting frame and a driving part I for driving the mounting frame to move along the vertical direction, and two groups of sucking disc assemblies I which are symmetrically arranged left and right and a sucking disc assembly II which is positioned between the two groups of sucking disc assemblies I are arranged at the bottom of the mounting frame; the mounting frame is provided with a second driving piece for driving the first suction cup assemblies or the second suction cup assemblies to move in the vertical direction, and the mounting frame is further provided with a third driving piece for driving the two first suction cup assemblies to move close to each other or away from each other. According to the workpiece conveying device for the laser cutting machine, before an aluminum plate is lifted, the two side edges of the aluminum plate are tilted upwards firstly, at the moment that the aluminum plate is lifted, air can enter the position between the upper aluminum plate and the lower aluminum plate from the left side and the right side of the aluminum plate, the situation that large negative pressure is formed between the grabbed aluminum plate and the adjacent aluminum plate below is improved, and the working efficiency is improved. And the aluminum plate can be smoothly grabbed, and normal feeding of the aluminum plate is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece conveying, and in particular to a workpiece conveying device for a laser cutting machine. Background Art

[0002] Aluminum sheets have the advantages of light weight, high strength, corrosion resistance, easy processing, beautiful appearance, good thermal conductivity, environmental sustainability and economic applicability. These advantages make aluminum sheets play an increasingly important role in modern industrial production and life. In the process of using laser cutting machines to process aluminum sheets, it is necessary to transport the aluminum sheets and move them to the cutting station for processing.

[0003] A Chinese patent with announcement number CN116872245B discloses an anti-drop vacuum suction cup manipulator for handling aluminum plates, including a pillar, a rotating rod, an electric telescopic rod, a first support rod, a second support rod and a vacuum suction cup. The rotating rod is rotatably connected to the top of the pillar, the top of the electric telescopic rod is slidably connected to the inside of the rotating rod, the first support rod is fixedly connected to the movable end of the electric telescopic rod, four second support rods are connected to the bottom of the first support rod, vacuum suction cups are arranged at both ends of the four second support rods, and resistance rods for resisting the aluminum plate are symmetrically inserted on the first support rod.

[0004] When the cleaning plate in the above patent document moves to both sides, the dust on the surface of the aluminum plate under the vacuum suction cup is scraped and cleaned, so as to avoid the situation that the vacuum suction cup and the aluminum plate cannot be completely sealed due to dust during the process of contacting and vacuum adsorption between the vacuum suction cup and the aluminum plate. This improves the effectiveness of the vacuum suction cup in vacuum adsorption of the aluminum plate and ensures the stability during the transportation of the aluminum plate.

[0005] However, since aluminum sheets are generally stacked in multiple layers, the top aluminum sheet fits tightly against the aluminum sheet below it. When the top aluminum sheet is lifted up, a low-pressure area is formed between the top aluminum sheet and the aluminum sheet below it. The air pressure creates a large downward resistance to the top aluminum sheet, making it easy for the aluminum sheet to detach from the grabbing suction cup at the moment of being lifted up, causing grabbing failure or causing the lower aluminum sheet to shift, thereby causing the suction cup to shift from its normal grabbing position for the aluminum sheet, affecting subsequent processing steps.

[0006] Therefore, the art needs a workpiece conveying device for a laser cutting machine to solve the above problems. Summary of the invention

[0007] The present invention provides a workpiece conveying device for a laser cutting machine, aiming to solve the problem in the related art that when an aluminum thin plate is grasped by a suction cup, negative pressure is formed between the upper and lower adjacent aluminum thin plates, causing the aluminum thin plate to easily separate from the grasping suction cup at the moment of being grasped, resulting in grasping failure or causing the aluminum thin plate in the lower layer to shift.

[0008] A workpiece conveying device for a laser cutting machine of the present invention comprises a moving frame, a mounting frame and a driving member 1 for driving the mounting frame to move vertically, the driving member 1 is fixedly connected to the moving frame, the mounting frame is arranged in the horizontal direction, two groups of suction cup assemblies 1 arranged symmetrically on the left and right and a suction cup assembly 2 located between the two groups of the suction cup assemblies 1 are arranged at the bottom of the mounting frame, a driving member 2 for driving the suction cup assembly 1 or the suction cup assembly 2 to move vertically is arranged on the mounting frame, and a driving member 3 for driving the two groups of the suction cup assemblies 1 to move toward each other or away from each other is also arranged on the mounting frame; After the suction cup assembly 1 and the suction cup assembly 2 are simultaneously adsorbed on the aluminum plate, the driving member 1 is controlled to drive the installation frame to move upward, and the driving member 2 is controlled to drive the suction cup assembly 2 to move downward relative to the installation frame, and the driving member 3 is controlled to drive the two groups of the suction cup assemblies 1 to move in a direction close to each other, so that before the aluminum plate is lifted, both sides of the aluminum plate are tilted upward; or the driving member 2 is controlled to drive the suction cup assembly 1 to move upward, and the driving member 3 is controlled to drive the two groups of the suction cup assemblies 1 to move in a direction close to each other, and after the two sides of the aluminum plate are tilted upward, the driving member 1 is controlled to drive the installation frame to move upward; The suction cup assembly 1 is rotatably connected to the bottom of the installation frame. When the suction cup assembly 1 adsorbs both sides of the aluminum plate and tilts upward, the two groups of suction cup assemblies 1 rotate in a direction away from each other. The second driving member is fixedly connected to the mounting frame, and the driving end of the second driving member is connected to the mounting block. The second suction cup assembly includes a second suction cup symmetrically arranged at the bottom of the mounting block, and the second suction cup is rotatably connected to the mounting block.

[0009] The present invention controls the suction cup component 1 to rise so that the two side edges of the aluminum plate are tilted upward, or controls the suction cup component 2 to descend and controls the installation frame to rise as a whole, so that the suction cup component 1 moves upward relative to the suction cup component 2, so that the two side edges of the aluminum plate are tilted upward. In this way, at the moment when the aluminum plate is lifted, air will enter between the upper and lower aluminum plates from the left and right sides of the aluminum plate, thereby improving the situation in which a large negative pressure is formed between the grasped aluminum plate and the adjacent aluminum plate below, which is conducive to the smooth grasping of the aluminum plate and ensures the normal feeding of the aluminum plate.

[0010] By setting the suction cup assembly 1 to be rotatably connected to the mounting frame, when the two side plates of the aluminum plate are tilted, the suction cup assembly 1 can rotate along with the change of the aluminum plate, thereby ensuring the stability and reliability of adsorption between the suction cup 1 and the aluminum plate.

[0011] By arranging the suction cup 2 to be rotatably connected to the mounting block, the suction cup 2 can rotate accordingly with the tilting of the aluminum plate, which is helpful to ensure the reliability of adsorption between the suction cup 2 and the aluminum plate.

[0012] Preferably, the mounting block includes an upper plate and a lower plate, the upper plate and the lower plate are elastically connected in the vertical direction, the upper plate is fixedly connected to the driving end of the second driving member, and the second suction cup is rotatably connected to the lower plate.

[0013] By elastically connecting the upper plate and the lower plate, when the second driving member drives the mounting block to move downward relative to the mounting frame, there is a buffer movement space between the upper plate and the lower plate. When the second suction cup abuts against the aluminum plate, the mounting block can move downward relative to the mounting frame, and the mounting frame can move upward relative to the mounting block under the action of the first driving member, so as to achieve the effect that the mounting frame drives the first suction cup assembly to move upward, and both sides of the aluminum plate are adsorbed and lifted.

[0014] Preferably, the first suction cup assembly includes suction cups arranged at intervals in the front-rear direction. A mounting ear is fixedly connected to the bottom of the mounting frame. The suction cup is rotatably connected to the corresponding mounting ear. A vacuum pump is arranged on the mounting frame. The suction cup and the second suction cup are respectively communicated with the vacuum pump.

[0015] Preferably, a limiting structure for restricting the rotation of the first suction cup assembly is arranged on the mounting frame. When the two first suction cup assemblies rotate from the side facing away from each other to the vertical state, the limiting structure restricts the two first suction cup assemblies from rotating towards the direction facing each other.

[0016] Preferably, the suction cups of the first suction cup assembly are connected by a connecting rod. The limiting structure includes a fourth driving member and a limiting rod. The fourth driving member is fixedly connected to the mounting frame. The limiting rod extends vertically and is fixedly connected to the driving end of the fourth driving member. The fourth driving member drives the limiting rod to abut against the connecting rod to restrict the two first suction cup assemblies from rotating towards the direction facing each other.

[0017] Preferably, the mounting frame includes a mounting seat, a connecting rod, and U-shaped frames symmetrically arranged on the left and right. The two U-shaped frames are respectively slidably connected to the connecting rod. The first suction cup assembly is connected to the bottom of the U-shaped frame. The mounting seat is fixedly connected to the driving end of the first driving member. One end of the third driving member is fixedly connected to the mounting seat, and the other end is fixedly connected to the corresponding U-shaped frame. The third driving member drives the two U-shaped frames to drive the two first suction cup assemblies to move towards or away from each other.

[0018] Preferably, the U-shaped frame includes a middle rod and an L-shaped rod slidably connected to the middle rod in the front-rear direction. The L-shaped rod is slidably connected to the corresponding connecting rod. An active block is connected between the L-shaped rod and the middle rod by an elastic member. Suction cups I are provided at the bottoms of the L-shaped rod, the middle rod, and the active block. The driving end of the third driving member is fixedly connected to the middle rod. A fifth driving member is connected between the connecting rod and the mounting seat. The fifth driving member drives the connecting rod to drive the corresponding L-shaped rod to move in the front-rear direction. The suction cup I is slidably matched with the connecting rod in the front-rear direction.

[0019] By setting the mounting frame to be telescopic in both the front-rear direction and the left-right direction, the mounting frame can drive the suction cup I to move synchronously in the front-rear direction and the left-right direction to adapt to the grasping of aluminum plates of different sizes, improving the applicability of the device.

[0020] Preferably, the moving frame includes a base and a rotating column rotatably connected to the base. The rotating column extends vertically. A motor for driving the rotating column to rotate is installed on the base. A horizontally arranged support rod is fixedly connected to the rotating column. The first driving member is fixedly connected to the support rod.

[0021] The beneficial effects of the present invention are as follows: By controlling the suction cup assembly I to rise, the two side edges of the aluminum plate are lifted upward, or by controlling the suction cup assembly II to descend while controlling the overall rising of the mounting frame, the suction cup assembly I moves upward relative to the suction cup assembly II, causing the two side edges of the aluminum plate to lift upward. In this way, at the moment when the aluminum plate is lifted, air will enter between the upper and lower aluminum plates from the left and right sides of the aluminum plate, improving the situation where a large negative pressure is formed between the grasped aluminum plate and the adjacent aluminum plate below, facilitating the smooth grasping of the aluminum plate and ensuring the normal feeding of the aluminum plate; Moreover, by setting the suction cup assembly I and the suction cup assembly II to be rotatably connected to the mounting frame, when the state of the adsorbed aluminum plate changes, the suction cup I and the suction cup II can rotate following the change of the aluminum plate, making the direction of the force exerted by the suction cup assembly I on the aluminum plate the same as the direction of the upward lifting of the aluminum plate, without exerting other-directional forces on the aluminum plate. The suction cup assembly II can also rotate slightly following the upward lifting of the aluminum plate, adapting to the shape of the aluminum plate, ensuring the stability and reliability of the adsorption between the suction cup I and the suction cup II and the aluminum plate, facilitating the stable grasping and conveying of the aluminum plate, avoiding the phenomenon of irreversible deformation due to large stress at the bending part of the aluminum plate, and ensuring that the aluminum plate can return to flatness. Therefore, the present invention achieves the effect of reducing the negative pressure between adjacent upper and lower aluminum plates while ensuring that the bending force received by the aluminum plate is small. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of a workpiece conveying device for a laser cutting machine according to the present invention.

[0023] Figure 2 It is a top view of a mounting frame of a workpiece conveying device for a laser cutting machine according to the present invention.

[0024] Figure 3 This is a schematic diagram of the structure of the installation frame of a workpiece conveying device for a laser cutting machine of the present invention. Figure 1 .

[0025] Figure 4 This is a schematic diagram of the structure of the installation frame of a workpiece conveying device for a laser cutting machine of the present invention. Figure 2 .

[0026] Figure 5 The present invention is a schematic diagram of the assembly of a mounting frame and a suction cup assembly of a workpiece conveying device for a laser cutting machine.

[0027] Figure 6 The present invention is a schematic diagram of the assembly of a mounting block and a suction cup assembly 2 of a workpiece conveying device for a laser cutting machine.

[0028] Reference numerals: 1. Mobile frame; 11. Base; 12. Rotating column; 13. Support rod; 2. Mounting frame; 21. Mounting seat; 22. Connecting rod; 23. Intermediate rod; 231. Extension plate; 24. L-shaped rod; 25. Movable block; 26. Spring; 27. Connecting plate; 28. Mounting ear; 29. ​​Vacuum pump; 3. Driving component 1; 4. Driving component 2; 5. Driving component 3; 6. Suction cup 1; 61. Connecting rod; 62. Sliding block; 7. Driving component 5; 8. Mounting block; 81. Upper plate; 82. Lower plate; 9. Suction cup 2; 10. Driving component 4; 101. Limit rod; 102. Laser cutting machine. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figures 1 to 6 As shown, a workpiece conveying device for a laser cutting machine of the present invention comprises a moving frame 1, a mounting frame 2 and a driving member 3 for driving the mounting frame 2 to move vertically. The moving frame 1 is arranged on one side of the laser cutting machine 102. The mounting frame 2 is rectangular and arranged in the horizontal direction, and the extending direction of the longer side of the mounting frame 2 is defined as the front-to-back direction. Two groups of suction cup assemblies 1 arranged symmetrically on the left and right and a suction cup assembly 2 located between the two groups of suction cup assemblies 1 are arranged at the bottom of the mounting frame 2, and the suction cup assembly 1 and the suction cup assembly 2 are used to grab the aluminum plate.

[0031] The moving frame 1 includes a base 11 and a rotating column 12 rotatably connected to the base 11. The rotating column 12 extends vertically. A motor (not shown in the figure) for driving the rotation of the rotating column 12 is installed on the base 11. A horizontally arranged support rod 13 is fixedly connected to the rotating column 12. The first driving member 3 is fixedly connected to the support rod 13. As an example, the first driving member 3 is a hydraulic telescopic cylinder, which is fixedly connected to the support rod 13, and the driving end of the hydraulic telescopic cylinder is connected to the installation frame 2. The motor drives the rotation of the rotating column 12, the rotating column 12 drives the first driving member 3 to rotate through the support rod 13, the first driving member 3 drives the installation frame 2 to rotate, and the installation frame 2 drives the aluminum plate to move through the first suction cup assembly and the second suction cup assembly, so as to move the grabbed aluminum plate to different processing stations and realize the automatic feeding of the aluminum plate.

[0032] A second driving member 4 for driving the second suction cup assembly to move vertically is arranged on the installation frame 2, and a third driving member 5 for driving the two suction cup assemblies to move closer to or away from each other is also arranged on the installation frame 2. After the first suction cup assembly and the second suction cup assembly are simultaneously adsorbed on the aluminum plate, control the first driving member 3 to drive the installation frame 2 to move upward, and at the same time control the second driving member 4 to drive the second suction cup assembly to move downward relative to the installation frame 2, and control the third driving member 5 to drive the two suction cup assemblies to move closer to each other, so that before the aluminum plate is lifted, its left and right sides first tilt upward. In this way, when the aluminum plate is lifted instantaneously, air will enter between the upper and lower aluminum plates from the left and right sides of the aluminum plate, improving the situation that a large negative pressure will be formed between the grabbed aluminum plate and the adjacent aluminum plate below, which is beneficial to the smooth grabbing of the aluminum plate and ensures the normal feeding of the aluminum plate.

[0033] It can be understood that in other embodiments, it can also be set that the second driving member 4 is used to drive the first suction cup assembly to move vertically. In this way, when grabbing the aluminum plate, control the second driving member 4 to drive the first suction cup assembly to move upward, and at the same time control the third driving member 5 to drive the two suction cup assemblies to move closer to each other. After the two sides of the aluminum plate tilt upward, then control the first driving member 3 to drive the installation frame 2 to move upward, which can also improve the situation that a large negative pressure will be formed between the upper and lower aluminum plates and affect the smooth grabbing of the aluminum plate.

[0034] As Figures 1 to 4 shown, the installation frame 2 includes an installation seat 21, connecting rods 22 symmetrically arranged front and rear, and U-shaped frames symmetrically arranged left and right. The U-shaped frame includes an intermediate rod 23 and an L-shaped rod 24 slidably connected to the intermediate rod 23 in the front-rear direction. The two front and rear L-shaped rods 24 are respectively slidably connected to the corresponding connecting rods 22. A movable block 25 is connected between the L-shaped rod 24 and the intermediate rod 23 through a spring 26, and the two symmetrically arranged left and right movable blocks 25 are connected through a connecting plate 27. The L-shaped rod 24 is located below the corresponding connecting plate 27 to support the connecting plate 27 and the movable block 25.

[0035] The suction cup assembly 1 includes suction cups 16 arranged at intervals along the front-back direction. The bottoms of the L-shaped rod 24, the middle rod 23 and the movable block 25 are all provided with mounting ears 28, and the suction cups 16 are rotatably connected to the corresponding mounting ears 28. When the left and right sides of the aluminum plate are tilted upward, the suction cups 16 of the two sets of suction cup assemblies 1 rotate in directions away from each other under the drive of the aluminum plate to adapt to the changes of the aluminum plate, ensure the stability and reliability of the adsorption between the suction cups 16 and the aluminum plate, and at the same time make the direction of the force exerted by the suction cups 16 on the aluminum plate the same as the tilting direction of the aluminum plate, avoiding the phenomenon that the suction cups 16 exert forces on the aluminum plate in other directions, which leads to greater stress at the bending part of the aluminum plate.

[0036] The middle rod 23 is fixedly connected with extension plates 231 on both sides, the mounting seat 21 is fixedly connected with the driving end of the driving member 3, one end of the driving member 35 is fixedly connected with the mounting seat 21, and the other end is fixedly connected with the corresponding extension plate 231. The driving member 35 drives the two middle rods 23 to move in the direction of approaching or moving away from each other, and the two middle rods 23 drive the corresponding L-shaped rods 24 and the movable block 25 to move synchronously, so as to adjust the spacing of the suction cup 6 in the left and right directions. A driving member 57 is connected between the connecting rod 22 and the mounting seat 21. The driving member 57 drives the connecting rod 22 to drive the corresponding L-shaped rod 24 to move in the front-to-back direction. The L-shaped rod 24 drives the movable block 25 to move in the front-to-back direction through the spring 26, so as to adjust the spacing of the suction cup 6 in the front-to-back direction, so that the present invention can be applied to the grabbing of aluminum plates of different sizes, thereby improving the applicability of the present invention. As an example, the driving member 35 and the driving member 57 are both hydraulic telescopic cylinders.

[0037] like Figure 3 and Figure 6 As shown, the driving member 24 is fixedly connected to the mounting seat 21, and the driving end of the driving member 24 is connected with a mounting block 8, the mounting block 8 includes an upper plate 81 and a lower plate 82, the upper plate 81 and the lower plate 82 are elastically connected in the vertical direction, the upper plate 81 is fixedly connected with the driving end of the driving member 24, as an example, the driving member 24 is a hydraulic telescopic cylinder. The suction cup assembly 2 includes a suction cup 29 symmetrically arranged at the bottom of the lower plate 82, the bottom of the lower plate 82 is fixedly connected with a mounting ear 28, and the suction cup 29 is rotatably connected with the corresponding mounting ear 28. When the aluminum plate is tilted, the suction cup 29 can also rotate slightly with the tilting of the aluminum plate, so that the suction cup 29 is adapted to the deformation of the aluminum plate, which not only has good adsorption stability, but also does not generate forces in other directions on the aluminum plate, which is conducive to the aluminum plate to restore flatness. A vacuum pump 29 is arranged on the mounting seat 21, and the suction cup 16 and the suction cup 29 are respectively connected to the vacuum pump 29.

[0038] A limiting structure for limiting the rotation of the suction cup assembly 1 is provided on the mounting frame 2. When the two groups of suction cup assemblies 1 rotate from the sides away from each other to a vertical state, the limiting structure limits the two groups of suction cup assemblies 1 to rotate toward each other.

[0039] like Figure 4 and Figure 5 As shown, the suction cup 1 6 of the suction cup assembly 1 is connected by a connecting rod 61, and the suction cup 1 6 is slidably matched with the corresponding connecting rod 61 in the front-back direction through a slider 62. The limiting structure includes a driving member 4 10 and a limiting rod 101, the driving member 4 10 is fixedly connected to the installation frame 2, the limiting rod 101 extends vertically and is fixedly connected to the driving end of the driving member 4 10, and the driving member 4 10 drives the limiting rod 101 to abut against the slider 62, so as to limit the two sets of suction cup assemblies 1 from rotating in the direction toward each other.

[0040] After the aluminum plate is lifted up, the driving member 2 4 is controlled to drive the suction cup assembly 2 to move upward, and the driving member 3 5 is controlled to drive the two groups of suction cup assemblies 1 to move away from each other, so that the aluminum plate gradually returns to a horizontal state. During the movement, the suction cup 1 6 of the two groups of suction cup assemblies 1 gradually rotates to restore the vertical state. When the slider 62 corresponding to the suction cup 1 6 contacts the limit rod 101, the suction cup 1 6 returns to the vertical state, and the operation of the driving member 2 4 and the driving member 3 5 is stopped. The aluminum plate now returns to a horizontal state, which is conducive to the subsequent stable movement of the aluminum plate.

[0041] The specific working process of a workpiece conveying device for a laser cutting machine of the present invention is as follows: the motor is controlled to drive the rotating column 12 to rotate, the rotating column 12 drives the driving member 3 to rotate through the support rod 13, and the driving member 3 drives the installation frame 2 to rotate to the top of the stacked aluminum plate; the driving member 3 is controlled to drive the installation frame 2 to move downward, so that the suction cup 16 and the suction cup 29 are adsorbed on the aluminum plate; the driving member 13 is controlled to drive the installation frame 2 to move upward, and the driving member 24 is controlled to drive the installation block 8 to move downward, so that the installation frame 2 is lifted upward relative to the suction cup 29, and the installation frame 2 drives the suction cup 16 to adsorb the left and right sides of the aluminum plate and tilt upward, and at the same time, the driving member 35 drives the suction cup 16 of the two sets of suction cup assemblies 1 They move in the direction of approaching each other to adapt to the change in the spacing between the left and right sides when the left and right sides of the aluminum plate are tilted upward; after the left and right sides of the aluminum plate are tilted upward, the control driving member 2 4 stops driving, and the driving member 1 3 continues to lift the mounting frame 2, so that the aluminum plate is separated from the aluminum plates stacked below; after the aluminum plate is lifted up, the control driving member 2 4 drives the mounting block 8 to drive the suction cup 2 9 to move upward, and at the same time controls the driving member 3 5 to drive the two groups of suction cup assemblies to move in the direction away from each other, so that the aluminum plate gradually returns to a horizontal state; when the aluminum plate moves to the top of the cutting station of the laser cutting machine 102, the control driving member 1 3 drives the mounting frame 2 to move downward as a whole to place the aluminum plate on the cutting station.

[0042] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A workpiece conveying device for a laser cutting machine, comprising a movable frame, a mounting frame and a driving member 1 for driving the mounting frame to move vertically, wherein the driving member 1 is fixedly connected to the movable frame, and the mounting frame is arranged in the horizontal direction, characterized in that: The bottom of the installation frame is provided with two groups of suction cup assemblies 1 arranged symmetrically on the left and right and a suction cup assembly 2 located between the two groups of suction cup assemblies 1, the installation frame is provided with a driving member 2 for driving the suction cup assembly 1 or the suction cup assembly 2 to move vertically, and the installation frame is also provided with a driving member 3 for driving the two groups of suction cup assemblies 1 to move toward each other or away from each other; After the suction cup assembly 1 and the suction cup assembly 2 are simultaneously adsorbed on the aluminum plate, the driving member 1 is controlled to drive the mounting frame to move upward, while the driving member 2 is controlled to drive the suction cup assembly 2 to move downward relative to the mounting frame, and the driving member 3 is controlled to drive the two sets of suction cup assemblies 1 to move in a direction close to each other, so that both sides of the aluminum plate are tilted upward before being lifted; Alternatively, the driving member 2 is controlled to drive the suction cup assembly 1 to move upward, and the driving member 3 is controlled to drive the two groups of suction cup assemblies 1 to move in a direction close to each other, and after the two sides of the aluminum plate are tilted upward, the driving member 1 is controlled to drive the installation frame to move upward; The suction cup assembly 1 is rotatably connected to the bottom of the installation frame. When the suction cup assembly 1 adsorbs both sides of the aluminum plate and tilts upward, the two sets of suction cup assemblies 1 rotate in a direction away from each other. The second driving member is fixedly connected to the mounting frame, and the driving end of the second driving member is connected to the mounting block. The second suction cup assembly includes two suction cups symmetrically arranged at the bottom of the mounting block, and the suction cups are rotatably connected to the mounting block.

2. The workpiece conveying device for a laser cutting machine according to claim 1, characterized in that: The mounting block comprises an upper plate and a lower plate, the upper plate and the lower plate are elastically connected in the vertical direction, the upper plate is fixedly connected to the driving end of the second driving member, and the second suction cup is rotatably connected to the lower plate.

3. The workpiece conveying device for a laser cutting machine according to claim 1 or 2, characterized in that: The suction cup assembly includes suction cups 1 arranged at intervals along the front-to-back direction, a mounting ear is fixedly connected to the bottom of the mounting frame, suction cup 1 is rotatably connected to the corresponding mounting ear, a vacuum pump is arranged on the mounting frame, and suction cups 1 and 2 are respectively connected to the vacuum pump.

4. The workpiece conveying device for a laser cutting machine according to claim 3, characterized in that: A limiting structure for limiting the rotation of the suction cup assembly 1 is provided on the installation frame. When the two groups of suction cup assemblies 1 rotate from the side away from each other to the vertical state, the limiting structure limits the two groups of suction cup assemblies 1 to rotate in the direction facing each other.

5. The workpiece conveying device for a laser cutting machine according to claim 4, characterized in that: The suction cup one of the suction cup assembly one is connected by a connecting rod, and the limiting structure includes a driving member four and a limiting rod. The driving member four is fixedly connected to the mounting frame, the limiting rod extends vertically and is fixedly connected to the driving end of the driving member four, and the driving member four drives the limiting rod to rest against the connecting rod, thereby limiting the two groups of suction cup assemblies one from rotating in a direction facing each other.

6. The workpiece conveying device for a laser cutting machine according to claim 5, characterized in that: The mounting frame includes a mounting seat, a connecting rod and a ⌚-shaped frame symmetrically arranged on the left and right. The two ⌚-shaped frames are respectively slidably connected to the connecting rods. The suction cup assembly 1 is connected to the bottom of the ⌚-shaped frame. The mounting seat is fixedly connected to the driving end of the driving member 1. One end of the driving member 3 is fixedly connected to the mounting seat, and the other end is fixedly connected to the corresponding ⌚-shaped frame. The driving member 3 drives the two ⌚-shaped frames to drive the two groups of suction cup assemblies 1 to move in the direction of approaching or moving away from each other.

7. The workpiece conveying device for a laser cutting machine according to claim 6, characterized in that: The U-shaped frame includes a middle rod and an L-shaped rod slidably connected to the middle rod in the front-rear direction. The L-shaped rod is slidably connected to the corresponding connecting rod. An active block is connected between the L-shaped rod and the middle rod by an elastic member. Suction cups I are provided at the bottoms of the L-shaped rod, the middle rod, and the active block. The driving end of the third driving member is fixedly connected to the middle rod. A fifth driving member is connected between the connecting rod and the mounting seat. The fifth driving member drives the connecting rod to drive the corresponding L-shaped rod to move in the front-rear direction. The suction cup I is slidably engaged with the connecting rod in the front-rear direction.

8. The workpiece conveying device for a laser cutting machine according to claim 1, characterized in that: The moving frame includes a base and a rotating column rotatably connected to the base. The rotating column extends vertically. A motor for driving the rotating column to rotate is installed on the base. A horizontally arranged support rod is fixedly connected to the rotating column. The first driving member is fixedly connected to the support rod.

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