Automatic abrasive sheet changing device and sheet metal automatic polishing device

Abstract

The application discloses a kind of automatic replacement abrasive disc device and sheet metal automatic polishing device of sheet metal polishing technical field, including workbench and abrasive disc, the workbench top is provided with the storage cylinder for storing abrasive disc, the storage cylinder is slidably connected with tray in vertical direction, and the tray below is provided with jacking cylinder;The workbench top is also installed with separating plate, the front end of the separating plate is provided with bevel edge, and the bevel edge is used to separate abrasive disc;The application is simple in structure, low in manufacturing cost, does not need staff to manually replace abrasive disc, can greatly reduce production cost, reduce labor, improve polishing efficiency.

Description

Technical Field

[0001] This invention relates to the field of sheet metal grinding technology, specifically to an automatic grinding disc changing device and an automatic sheet metal grinding device. Background Technology

[0002] With the continuous development of automation technology, replacing manual labor with machinery has become the main development direction. Robotic polishing currently mainly consists of two working methods:

[0003] One method involves using the robot's end effector to hold the grinding tool and actively contact the workpiece, keeping the workpiece relatively fixed. This method is typically used when the robot's load capacity is limited and the workpiece being processed is both large in quality and volume, and is known as a tool-type grinding robot.

[0004] Another method involves the robot's end effector clamping the workpiece and grinding it by bringing the workpiece close to the grinding tool. The grinding tool is relatively fixed. This method is usually used when the workpiece is small and the grinding accuracy requirement is high. It is called a workpiece-type grinding robot.

[0005] With the continuous improvement of automation capabilities in panel production lines, the requirements for the grinding station on these lines are also increasing. Currently, the grinding station is operated manually by two people to grind and change grinding discs. Manual operation is labor-intensive and inefficient; issues with skill level and technical expertise make it difficult to guarantee the consistency of processed workpieces; the working environment for production personnel is harsh, with operators constantly exposed to noise and dust, which can be harmful to their health.

[0006] Based on this, the present invention designs an automatic grinding disc changing device and an automatic sheet metal grinding device to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an automatic grinding disc changing device and an automatic sheet metal grinding device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic grinding disc changing device, comprising a worktable and grinding discs, wherein a storage cylinder for storing grinding discs is provided on the top of the worktable, a tray is slidably connected to the storage cylinder in the vertical direction, and a lifting cylinder is provided below the tray; a separation plate is also installed on the top of the worktable, and a beveled cutting edge is provided at the front end of the separation plate for separating grinding discs.

[0009] As a further embodiment of the present invention, a recycling box is also installed on the workbench, and the recycling box is located below the separation plate.

[0010] An automatic sheet metal grinding device includes an automatic grinding disc changing device and a connecting flange; a fixed sleeve is fixedly connected below the connecting flange, a movable sleeve is fitted inside the fixed sleeve, and the movable sleeve and the fixed sleeve are connected by a first spring; a connecting plate is fixedly connected below the movable sleeve, and a grinding mechanism is provided at the bottom of the connecting plate.

[0011] As a further embodiment of the present invention, the polishing mechanism includes a fixed plate, and a polishing disc is fixedly mounted on the bottom of the fixed plate by Velcro; the hook side of the Velcro is fixed on the fixed plate, and the felt side of the Velcro is fixed on the top surface of the polishing disc; a drive motor for driving its rotation is mounted on the top of the fixed plate; the drive motor is fixedly connected to the connecting plate by bolts.

[0012] As a further embodiment of the present invention, two support rods are rotatably mounted on the top of the inner wall of the fixed disk, and the two support rods are symmetrically arranged about the center of the fixed disk; both support rods are telescopic rods and are provided with a return spring inside; gears are fixedly connected to the rotation shafts of the two support rods, and the two gears mesh with each other; a plug is hinged to the bottom end of the support rod, and a torsion spring is installed on the rotation shaft of the plug; a slot is opened on the top of the grinding disc, and the plug can be inserted into the slot.

[0013] As a further embodiment of the present invention, the cross-section of the slot is trapezoidal.

[0014] As a further aspect of the present invention, the grinding disc has two symmetrically arranged mounting slots inside, each mounting slot having a first slider elastically slidably connected thereto. Each first slider has a pressure block hinged to its bottom end. The pressure blocks are arranged at an angle, with their bottom ends being pointed. The two pressure blocks can respectively press the insertion rod. Each first slider has a push rod on its side for driving its movement. The push rod is elastically slidably connected to the mounting slot, and a connecting rope is fixedly connected to each push rod. A gravity ball is fixedly connected to the end of the connecting rope furthest from the first slider.

[0015] As a further embodiment of the present invention, each push rod is rotatably connected to a locking block at its top, and a torsion spring is fitted onto the rotating shaft of the locking block; the locking block can only rotate in one direction in the vertical state; a second slider is provided above each locking block, and the second slider is elastically slidably connected to the grinding disc in the vertical direction; the second slider has a slot that can engage with the locking block; the two second sliders are connected by a traction rope; an L-shaped block is fixedly connected to the top of the second slider; a notch is provided on the separation plate, and the end face of the notch is set as an inclined surface; the inclined surface of the notch can drive the L-shaped block to move upward.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The automatic grinding disc changing device of the present invention has a simple structure and low manufacturing cost. It does not require manual replacement of grinding discs by workers, which can greatly reduce production costs, reduce labor, and improve grinding efficiency.

[0018] 2. The automatic sheet metal grinding device of the present invention can automatically fix the grinding disc, and can fix the grinding disc more stably during operation, thereby better ensuring the grinding quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the automatic grinding disc changing device of the present invention;

[0020] Figure 2 This is a schematic diagram of the automatic polishing device of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of the automatic polishing device of the present invention;

[0022] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0023] Figure 5 This is a partial structural diagram of the present invention;

[0024] Figure 6 This is a schematic diagram of the grinding disc replacement state of the present invention;

[0025] Figure 7 for Figure 6 Enlarged view of section B in the middle.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Workbench; 2. Grinding disc; 3. Storage cylinder; 4. Tray; 5. Lifting cylinder; 6. Separating plate; 7. Beveled cutting edge; 8. Recycling box; 9. Connecting flange; 10. Fixed sleeve; 11. Movable sleeve; 12. First spring; 13. Connecting plate; 14. Fixed disc; 15. Drive motor; 16. Support rod; 17. Gear; 18. Insert rod; 19. Slot; 20. Mounting groove; 21. First slider; 22. Pressure block; 23. Push rod; 24. Connecting rope; 25. Gravity ball; 26. Locking block; 27. Second slider; 28. Locking groove; 29. ​​Traction rope; 30. L-shaped block; 31. Notch. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-7 The present invention provides a technical solution: an automatic grinding disc changing device, including a worktable 1 and grinding discs 2. The top of the worktable 1 is provided with a storage cylinder 3 for storing grinding discs 2. The storage cylinder 3 is slidably connected to a tray 4 in the vertical direction. A lifting cylinder 5 is provided below the tray 4. A separation plate 6 is also installed on the top of the worktable 1. The front end of the separation plate 6 is provided with a beveled cutting edge 7 for separating grinding discs 2. A recycling box 8 is also installed on the worktable 1. The recycling box 8 is located below the separation plate 6.

[0030] At work, such as Figure 1 As shown, the workbench 1 is supported by a bracket made of square tubing welded together. The storage cylinder for new grinding discs 2 is made of seamless steel pipe cut and welded together. The lifting cylinder 5 is ultra-thin, and the cylinder rod of the lifting cylinder 5 is connected to the tray 4, which is used to place new grinding discs 2. The separation plate 6 is made of steel plate, and the front end is machined into a beveled cutting edge 7. The recycling box 8 is used to place the separated old grinding discs 2. When the grinding discs 2 are replaced, the grinding device is driven by a robot to move the old grinding discs 2 on the grinding device to a state parallel to the separation plate 6. Then, the grinding device moves parallel to the separation plate 6 and uses the beveled cutting edge 7 of the separation plate 6 to separate the grinding discs 2 from the grinding device. The separated grinding disc 2 falls directly into the recycling box 8; then the robot drives the grinding device to move above the storage cylinder 3, and the mounting end face of the grinding disc 2 of the grinding device is aligned parallel to the new grinding disc 2 and stops at a suitable position. The lifting cylinder 5 is used to lift the new grinding disc 2 and make contact with the mounting end face of the grinding device, completing the installation and realizing the automatic replacement of the grinding disc; it should be noted that when the grinding disc 2 is placed on the tray 4, the felt side is facing up and the grinding side is facing down; the automatic grinding disc replacement device of the present invention has a simple structure, low manufacturing cost, and does not require manual replacement of grinding discs by workers, which can greatly reduce production costs, reduce labor, and improve grinding efficiency.

[0031] An automatic sheet metal grinding device includes an automatic grinding disc changing device and a connecting flange 9; a fixed sleeve 10 is fixedly connected below the connecting flange 9, and a movable sleeve 11 is fitted inside the fixed sleeve 10. The movable sleeve 11 and the fixed sleeve 10 are connected by a first spring 12; a connecting plate 13 is fixedly connected below the movable sleeve 11, and a grinding mechanism is provided at the bottom of the connecting plate 13.

[0032] The polishing mechanism includes a fixed plate 14, on the bottom of which a polishing disc 2 is fixedly mounted by Velcro; the hook side of the Velcro is fixed to the fixed plate 14, and the felt side of the Velcro is fixed to the top surface of the polishing disc 2; a drive motor 15 for driving its rotation is mounted on the top of the fixed plate 14; the drive motor 15 is fixedly connected to the connecting plate 13 by bolts.

[0033] At work, such as Figure 2 and Figure 3 As shown, the connecting flange 9 can be connected to the six-axis end face of the grinding robot by bolts; the fixed sleeve 10 and the movable sleeve 11 are slidably sleeved, and the first spring 12 can realize axial flexible adjustment. When the grinding device is grinding the workpiece, the grinding disc 2 is in flexible contact with the workpiece, and the grinding pressure can be automatically adjusted according to the elastic force of the first spring 12; when the grinding work is being performed, the drive motor 15 drives the fixed plate 14 and the grinding disc 2 to rotate; it should be noted that when the grinding disc 2 is being replaced, the beveled cutting edge 7 will be inserted between the fixed plate 14 and the grinding disc 2, thereby separating the hook side of the Velcro and the felt side, and then the grinding disc 2 can fall off automatically.

[0034] As a further embodiment of the present invention, two support rods 16 are rotatably mounted on the top of the inner wall of the fixed disk 14, and the two support rods 16 are symmetrically arranged about the center of the fixed disk 14; both support rods 16 are telescopic rods and are provided with a return spring inside; gears 17 are fixedly connected to the rotation shafts of the two support rods 16, and the two gears 17 mesh with each other; a plug rod 18 is hinged to the bottom end of the support rod 16, and a torsion spring is installed on the rotation shaft of the plug rod 18; a slot 19 is opened on the top of the grinding disc 2, and the plug rod 18 can be inserted into the slot 19.

[0035] At work, such as Figure 3 and Figure 4 As shown, when replacing the grinding disc 2, before the hook surface of the bottom of the fixing plate 14 is in contact with the felt surface of the top surface of the grinding disc 2 when the lifting cylinder 5 lifts the tray 4 and the grinding disc 2, the insertion rod 18 at the bottom of the support rod 16 will first contact the slot 19 opened in the middle of the grinding disc. Then, as the grinding disc 2 continues to move upward, the insertion rod 18 will move outward and insert into the slot 19 until the insertion rod 18 moves to the position shown in the diagram. Figure 4 As shown in the diagram; since the two insert rods 18 are symmetrically arranged, and the grinding disc 2 is parallel to the fixed plate 14 when it is installed, the two support rods 16 can correct the position of the grinding disc 2, ensuring that the grinding disc 2 and the fixed plate 14 are coaxial, thus preventing the grinding disc 2 from shifting during installation; at the same time, the support rods 16 can fix the grinding disc 2, ensuring that the grinding disc 2 is more stable during grinding; when the grinding disc 2 is replaced, when the separating plate 6 contacts the support rod 16, the beveled cutting edge 7 will drive the support rod 16 to move the insert rod 18 out of the slot 19, causing the insert rod 18 to disengage from the slot 19; under the action of the two meshing gears 17, the two support rods 16 will rotate synchronously in opposite directions, and after both insert rods 18 disengage from the slot 19, the grinding disc 2 can automatically fall into the recycling box 8 for collection.

[0036] As a further embodiment of the present invention, the cross-section of the slot 19 is trapezoidal.

[0037] At work, such as Figure 4 As shown, by designing the cross-section of the slot 19 as a trapezoidal shape, the insertion rod 18 can be inserted into the slot 19 more easily, and the deeper the insertion rod 18 is inserted, the more stable the fixing effect on the grinding plate 2.

[0038] As a further embodiment of the present invention, the grinding disc 2 has two symmetrically arranged mounting grooves 20 inside, and each mounting groove 20 is elastically slidably connected to a first slider 21. The bottom end of each first slider 21 is hinged to a pressure block 22. The pressure block 22 is inclined and the bottom end is set as a pointed tip. The two pressure blocks 22 can respectively press the insertion rod 18. Each side of the first slider 21 is provided with a push rod 23 for driving its movement. The push rod 23 is elastically slidably connected to the mounting groove 20. A connecting rope 24 is fixedly connected to each push rod 23. A gravity ball 25 is fixedly connected to the end of the connecting rope 24 away from the first slider 21.

[0039] At work, such as Figures 3-5 As shown, when the drive motor 15 drives the fixed disk 14 and the grinding disc 2 to rotate at high speed for grinding, the gravity ball 25 inside the grinding disc 2 will move outward under the action of centrifugal force. The gravity ball 25 will drive the push rod 23 to move outward synchronously through the connecting rope 24; as Figure 4 As shown, when the push rod 23 moves to the left, it drives the first slider 21 to move the pressure block 22 downward. It should be noted that in this embodiment, multiple sets of first sliders 21 and pressure blocks 22 are provided. The push rod 23 can drive multiple first sliders 21 to move downward sequentially (not simultaneously). When the first slider 21 moves downward, it drives the pressure block 22 to move downward synchronously. The pressure block 22 moves to the lower left along the inclined guide groove opened inside the grinding disc 2. The bottom tip of the pressure block 22 presses against the insert rod 18. At this time, the bottom end of the pressure block 22 can only move to the left and cannot move to the right. Therefore, when the grinding disc 2 is performing grinding work, the insert rod 18 can remain stable under the action of the pressure block 22, which can make the insert rod 18 more stable. The fixed grinding disc ensures that the grinding disc 2 does not wobble, allowing it to perform grinding work more effectively. Furthermore, the distance the gravity ball 25 moves outward can vary depending on the rotational speed of the grinding disc 2. The higher the rotational speed of the grinding disc 2, the farther the gravity ball 25 drives the push rod 23 to move outward. This increases the number of pressure blocks 22 acting on the insertion rod 18, further ensuring the insertion rod 18's fixation of the grinding disc. After the grinding disc 2 stops working, the push rod 23 returns to its initial position under the spring force, and the first slider 22 also moves upward to its initial position under the spring force. Then, the pressure block 22's pressing effect on the insertion rod 18 disappears, facilitating subsequent replacement of the grinding disc 2.

[0040] As a further embodiment of the present invention, each push rod 23 is rotatably connected to a locking block 26 at its top, and a torsion spring is fitted on the rotating shaft of the locking block 26; the locking block 26 can only rotate in one direction in the vertical state; a second slider 27 is provided above each locking block 26, and the second slider 27 is elastically slidably connected to the grinding disc 2 in the vertical direction; the second slider 27 has a slot 28 that can engage with the locking block 26; the two second sliders 27 are connected by a traction rope 29; an L-shaped block 30 is fixedly connected to the top of the second slider 27; a notch 31 is provided on the separation plate 6, and the end face of the notch 31 is set as an inclined surface; the inclined surface of the notch 31 can drive the L-shaped block 30 to move upward.

[0041] At work, such as Figures 4-7 As shown, in this embodiment, after the gravity ball 25 moves the push rod 23 outward under the action of centrifugal force, the push rod 23 will drive the locking block 26 to move outward synchronously; as Figure 4 As shown, when the locking block 26 moves to the left, the slot 28 on the second slider 27 will drive the locking block 26 to rotate clockwise (it should be noted that, in Figure 4 In this state, block 26 can only rotate clockwise and not counterclockwise. Figure 4 In its current state, the locking block 26 can only move to the left, not to the right. After the locking block 26 stabilizes, it will be inserted into the slot 28 and limited, ensuring that the insert rod 18 remains in the fixed state of the grinding disc 2 during subsequent grinding work until the grinding disc 2 needs to be replaced. When the grinding disc 2 needs to be replaced, the inclined surface of the notch 31 will drive the L-shaped block 30 to move the second slider 27 upward, thereby causing the locking block 26 to disengage from the slot 28. Then, the push rod 23 can move back to its initial position under the elastic force of the spring. At this time, the pressure block 22 disengages from the insert rod 18. Then the insert rod 18 can be removed from the slot 19. With the setting of the traction rope 29, the two second sliders 27 can move upward synchronously, so that the two insert rods 18 can be removed from the slot 19 synchronously.

Claims

1. An automatic sheet metal grinding device, comprising a worktable (1) and a grinding disc (2), characterized in that: The top of the workbench (1) is provided with a storage cylinder (3) for storing grinding discs (2), and the storage cylinder (3) is slidably connected to a tray (4) in the vertical direction. A lifting cylinder (5) is provided below the tray (4). A separation plate (6) is also installed on the top of the workbench (1). The front end of the separation plate (6) is provided with a beveled cutting edge (7), which is used to separate the grinding discs (2). It also includes a connecting flange (9); a fixed sleeve (10) is fixedly connected below the connecting flange (9), and a movable sleeve (11) is fitted inside the fixed sleeve (10). The movable sleeve (11) and the fixed sleeve (10) are connected by a first spring (12); a connecting plate (13) is fixedly connected below the movable sleeve (11), and a grinding mechanism is provided at the bottom of the connecting plate (13). The polishing mechanism includes a fixed plate (14), on which a polishing disc (2) is fixedly mounted by Velcro at the bottom; the hook side of the Velcro is fixed to the fixed plate (14), and the felt side of the Velcro is fixed to the top surface of the polishing disc (2); a drive motor (15) for driving its rotation is installed on the top of the fixed plate (14); the drive motor (15) is fixedly connected to the connecting plate (13) by bolts. Two support rods (16) are rotatably mounted on the top of the inner wall of the fixed disk (14). The two support rods (16) are symmetrically arranged about the center of the fixed disk (14). Both support rods (16) are telescopic rods and are equipped with return springs inside. Gears (17) are fixedly connected to the rotating shafts of the two support rods (16), and the two gears (17) mesh with each other. A plug rod (18) is hinged to the bottom end of the support rod (16), and a torsion spring is installed on the rotating shaft of the plug rod (18). A slot (19) is opened on the top of the grinding disc (2), and the plug rod (18) can be inserted into the slot (19). The grinding disc (2) has two symmetrically arranged mounting slots (20) inside. Each mounting slot (20) is elastically slidably connected to a first slider (21). Each first slider (21) has a pressure block (22) hinged to its bottom end. The pressure block (22) is inclined and has a pointed bottom end. The two pressure blocks (22) can press the insertion rod (18) respectively. Each side of the first slider (21) is provided with a push rod (23) for driving its movement. Each push rod (23) is elastically slidably connected to the mounting slot (20). Each push rod (23) is fixedly connected to a connecting rope (24). Each end of the connecting rope (24) away from the first slider (21) is fixedly connected to a gravity ball (25).

2. The automatic sheet metal grinding device according to claim 1, characterized in that: A recycling box (8) is also installed on the workbench (1), and the recycling box (8) is located below the separation plate (6).

3. The automatic sheet metal grinding device according to claim 1, characterized in that: The slot (19) has a trapezoidal cross-section.

4. The automatic sheet metal grinding device according to claim 1, characterized in that: Each push rod (23) has a rotatable block (26) rotatably connected to its top. A torsion spring is fitted on the rotating shaft of the block (26). The block (26) can only rotate in one direction in the vertical state. A second slider (27) is provided above each block (26). The second slider (27) is elastically slidably connected to the grinding disc (2) in the vertical direction. The second slider (27) has a slot (28) that can engage with the block (26). The two second sliders (27) are connected by a traction rope (29). An L-shaped block (30) is fixedly connected to the top of the second slider (27). A notch (31) is provided on the separation plate (6). The end face of the notch (31) is set as an inclined surface. The inclined surface of the notch (31) can drive the L-shaped block (30) to move upward.

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