Automatic abrasive paper changing device

Abstract

The utility model discloses an automatic abrasive paper changing device which is characterized by comprising a machine body, an abrasive paper feeding mechanism and an abrasive paper tearing mechanism, wherein the abrasive paper feeding mechanism and the abrasive paper tearing mechanism are arranged on the machine body; the abrasive paper feeding mechanism comprises a guide frame, a supporting plate and a jacking mechanism, a discharging cavity is formed in the top of the guide frame, the supporting plate is movably arranged in the discharging cavity, and the jacking mechanism is configured to drive the supporting plate to move up and down along the discharging cavity; the abrasive paper tearing mechanism comprises a tearing plate, the tearing plate is installed on the side wall of the machine body, a gap is formed between the middle of the tearing plate and the side wall of the machine body, the top face of the tearing plate is a tearing inclined face, and the tearing inclined face is arranged downwards in an inclined mode from outside to inside. And a tearing bevel angle is formed between the tearing slope and the outer side wall of the tearing plate. The automatic abrasive paper changing device achieves automatic abrasive paper changing, and reduces labor intensity and cost of operators.

Description

Technical Field

[0001] The utility model relates to automation equipment, in particular to an automatic sandpaper changing device. Background Art

[0002] In some polishing fields, when sandpaper is used to polish the surface of a product, for example, sandpaper is used to polish the burrs on the surface, or to polish the uneven areas on the surface. Generally, manual polishing is used. Since the efficiency of manual polishing is relatively low, the labor intensity of the operator is relatively high, and the consistency of manual polishing is relatively poor, in the existing practice, for batches of products, a robot is generally used for automatic polishing. Among them, for products with higher requirements, such as 3C equipment and the polishing of the metal shell of a laptop computer, after the sandpaper is polished on a product, or after a certain number of products are polished, the wear of the sandpaper reaches a certain length, and when another product is polished later, the polishing effect of the subsequent product will be poor. Therefore, the sandpaper generally needs to be replaced. The conventional replacement method is that the robot extends the robot and then manually replaces the sandpaper. In this method, the efficiency is relatively low and the labor intensity of the operator is also relatively high. Therefore, how to automatically change the sandpaper on the basis of automatic polishing is the direction that technicians in this field need to work hard on. Summary of the invention

[0003] The utility model aims to provide an automatic sandpaper changing device. By using the structure, the automatic change of sandpaper is realized, and the manual labor intensity and labor cost are reduced.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an automatic sandpaper changing device, comprising a body, a sandpaper feeding mechanism and a sandpaper tearing mechanism arranged on the body;

[0005] The sandpaper feeding mechanism comprises a guide frame, a support plate and a lifting mechanism, the top of the guide frame is provided with a discharge cavity, the support plate is movably arranged in the discharge cavity, and the lifting mechanism is configured to drive the support plate to move up and down along the discharge cavity;

[0006] The sandpaper tearing mechanism includes a tearing plate, which is installed on the side wall of the machine body. A gap is provided between the middle of the tearing plate and the side wall of the machine body. The top surface of the tearing plate is a tearing slope, which is inclined downward from the outside to the inside, and a tearing angle is formed between the tearing slope and the outer side wall of the tearing plate.

[0007] In the above technical solution, a notch communicating with the interior of the body is provided on the side wall of the body, a frame is installed on the notch, both sides of the tear-off plate are respectively connected to both sides of the frame by bolts, the top of the tear-off plate is arranged opposite to the hollow part of the frame, and the tear-off slope is arranged opposite to the notch.

[0008] In the above technical solution, the top of the frame is provided with an extended boss, the boss is arranged directly above the tear-off slope, a vertical distance is provided between the boss and the tear-off slope, and the outer side surface of the tear-off plate is arranged on the outside below the boss.

[0009] In the above technical solution, a guide surface is provided on the bottom surface of the boss, and the guide surface is arranged to be inclined inward from top to bottom, and the inclination direction of the guide surface is the same as the inclination direction of the tearing slope.

[0010] In the above technical solution, a chamber is provided in the body, and the notch is communicated with the chamber; a door is provided on the body, and the door opens or closes the chamber.

[0011] In the above technical solution, a correction block is further provided on the top of the machine body, and an arc groove is provided on the side wall of the correction block.

[0012] In the above technical solution, a color sensor is also provided on the side wall of the correction block, and the color sensor is arranged on the side wall of the correction block beside the arc groove or on the side opposite to the arc groove.

[0013] In the above technical solution, the sandpaper feeding mechanism is at least one group, and a plurality of groups of the sandpaper feeding mechanisms are arranged on the machine body at intervals.

[0014] In the above technical solution, the guide frame includes a bottom plate, a top positioning ring and at least two guide rods parallel to each other, the bottom plate is mounted on the machine body, the top positioning ring is arranged directly above the bottom plate, the two ends of the guide rod are respectively connected to the bottom plate and the top positioning ring, and the discharge chamber is arranged between the top positioning ring and the bottom plate;

[0015] The support plate is provided with a vertical hole matching the guide rod, the support plate is movably connected to the guide rod via the vertical hole, and the support plate is arranged between the top positioning ring and the bottom plate;

[0016] The lifting mechanism comprises a lifting cylinder or a lifting electric cylinder, and the bottom of the supporting plate is connected to the top of the lifting mechanism via a connecting rod passing through the bottom plate.

[0017] In the above technical solution, at least one through groove is provided on the top of the support plate, and at least two ends of the through groove penetrate the outer wall of the support plate.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] 1. In the utility model, a sandpaper feeding mechanism is provided, and the sandpaper is automatically fed by the sandpaper feeding mechanism. Then, a sandpaper tearing mechanism is provided, and a tearing inclined surface is provided on the tearing plate to form a tearing angle. In this way, a manipulator equipped with sandpaper is directly moved to the tearing angle. The movement of the manipulator is used to tear the sandpaper directly from the manipulator at the tearing angle, so that the sandpaper is automatically torn off. Then, the sandpaper is moved to the required sandpaper feeding mechanism to automatically stick the sandpaper on the manipulator, so that the sandpaper is automatically replaced, which effectively improves the efficiency of sandpaper replacement, reduces the labor intensity of operators, and also reduces labor costs;

[0020] 2. In the utility model, by setting the color sensor and the correction block, it is possible to detect whether the sandpaper is normally installed on the manipulator, and it is also possible to correct the position where the sandpaper is installed on the manipulator to ensure the replacement quality of the sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the first embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present utility model under another viewing angle;

[0023] Figure 3 It is a schematic cross-sectional view of the structure of the first embodiment of the present utility model;

[0024] Figure 4 The utility model is a three-dimensional structural schematic diagram of the connection between the tear-off plate and the frame in the first embodiment;

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure from another perspective;

[0026] Figure 6 The utility model is a schematic diagram of the side structure of the connection between the tear-off plate and the frame in the first embodiment;

[0027] Figure 7 The utility model is a schematic cross-sectional structure diagram of the connection between the tear-off plate and the frame in the first embodiment.

[0028] Among them: 1. Machine body; 2. Guide frame; 3. Support plate; 4. Lifting mechanism; 5. Discharge chamber; 6. Tear-off plate; 7. Tear-off slope; 8. Tear-off angle; 9. Notch; 10. Frame; 11. Bolt; 12. Boss; 13. Guide surface; 14. Chamber; 15. Box door; 16. Through-beam sensor; 17. Transmitter; 18. Receiver; 19. Mounting hole; 20. Calibration block; 21. Arc groove; 22. Color sensor; 23. Bottom plate; 24. Top positioning ring; 25. Guide rod; 26. Connecting rod; 27. Through groove. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0030] Example 1: See Figure 1-7 As shown, an automatic sandpaper changing device comprises a body 1, a sandpaper feeding mechanism and a sandpaper tearing mechanism arranged on the body 1;

[0031] The sandpaper feeding mechanism includes a guide frame 2, a support plate 3 and a lifting mechanism 4. A discharge cavity 5 is provided on the top of the guide frame 2. The support plate 3 is movably arranged in the discharge cavity 5. The lifting mechanism 4 is configured to drive the support plate 3 to move up and down along the discharge cavity 5.

[0032] The sandpaper tearing mechanism includes a tearing plate 6, which is installed on the side wall of the body 1. A gap is provided between the middle of the tearing plate 6 and the side wall of the body 1. The top surface of the tearing plate 6 is a tearing slope 7, which is inclined downward from the outside to the inside, and a tearing angle 8 is formed between the tearing slope 7 and the outer side wall of the tearing plate 6.

[0033] In this embodiment, in actual use, the automatic sandpaper changing device is arranged beside the grinding equipment, and the grinding equipment uses a manipulator to automatically grind the product. Among them, the manipulator is provided with a grinding self-adhesive disc on which the sandpaper is stuck. Among them, when the sandpaper is replaced, the manipulator moves to the top of the sandpaper tearing mechanism, and then the angle of the manipulator is adjusted to a vertical state, so that the connection between the sandpaper and the grinding self-adhesive disc is just above the tearing bevel, and then the sandpaper and the grinding self-adhesive disc move down, and are inserted between the grinding self-adhesive disc and the sandpaper through the tearing bevel of the tearing plate, and the sandpaper is torn off from the grinding self-adhesive disc through the tearing bevel of the tearing plate. During the tearing process, the tearing bevel will separate the sandpaper torn off from the grinding self-adhesive disc at a certain angle to prevent the sandpaper from being stuck to the grinding self-adhesive disc again. After tearing, the manipulator moves away and moves to the top of the sandpaper feeding mechanism. Among them, unused sandpaper will be stacked from bottom to top on the support plate in the discharge chamber, and the sandpaper will be limited by the discharge chamber, and the lifting mechanism will drive the support plate and sandpaper to move upward. After the robot moves to the top of the sandpaper feeding mechanism, the lifting mechanism will drive the support plate and sandpaper to move up to the predetermined position in advance, or other methods will be used to make the top sandpaper at a certain height so that it can be touched by the polishing self-adhesive disc, and then the robot moves down, and the polishing self-adhesive disc will move downward from the top of the discharge chamber and rest on the top piece of sandpaper, and stick the top piece of sandpaper through its stickiness, and then the robot moves away and moves back to the polishing equipment to polish the product, and so on. In this way, there is no need to manually tear off the sandpaper, which reduces the labor intensity of the operator.

[0034] At the same time, the sandpaper feeding mechanism is at least one group, and multiple groups of the sandpaper feeding mechanisms are arranged at intervals on the machine body. In this embodiment, there are three groups of sandpaper feeding mechanisms, and the three groups of sandpaper feeding mechanisms are arranged at intervals from left to right. Different sandpaper feeding mechanisms can hold sandpapers of different sizes and types, so that sandpaper can be provided to multiple grinding devices at the same time.

[0035] See also Figure 2-7 As shown, a notch communicating with the interior of the body 1 is provided on the side wall of the body 1, a frame 10 is installed on the notch 9, both sides of the tear-off plate 6 are connected to both sides of the frame 10 via bolts 11, the top of the tear-off plate 6 is arranged opposite to the hollow part of the frame 10, and the tear-off slope 7 is arranged opposite to the notch 9. The hollow part of the frame passes through the front side wall and the rear side wall of the frame.

[0036] In this embodiment, the setting of the frame is used to install the tear-off plate on the body at the notch. At the same time, due to the existence of the notch, after the tear-off plate tears off the sandpaper, it will pass through the hollow part of the frame and then enter the body through the notch. A receiving bucket can be set in the body to collect the torn sandpaper for unified treatment.

[0037] The notch is installed on the rear side wall of the machine body, the tear-off plate and the frame are also installed on the rear side of the machine body, the rear side of the tear-off bevel is connected to the rear side of the tear-off plate, and the front end of the tear-off bevel is connected to the front side of the tear-off plate. The tear-off bevel is tilted downward from the back to the front, and a tear-off bevel angle is formed between the rear end of the tear-off bevel and the rear side of the tear-off plate. When the connection between the sandpaper and the polishing self-adhesive disc moves to the tear-off bevel angle, the sandpaper and the polishing self-adhesive disc move downward, so that the tear-off bevel angle is inserted into the connection between the sandpaper and the polishing self-adhesive disc, and the connection between the sandpaper and the polishing self-adhesive disc is separated, and the polishing self-adhesive disc and the sandpaper move downward relative to the tear-off bevel angle, so the tear-off bevel angle will continue to tear the sandpaper from the polishing self-adhesive disc, until the polishing self-adhesive disc moves completely, and the sandpaper is completely torn off from the polishing self-adhesive disc of the manipulator, so that the sandpaper is automatically torn off, which is efficient and of good quality, and does not require manual operation by the staff.

[0038] See also Figure 3-7 As shown, the top of the frame 10 is provided with a boss 12 extending backwards, the boss 12 is arranged directly above the tear-off slope 7, a vertical spacing is provided between the boss 12 and the tear-off slope 7, and the rear side surface of the tear-off plate 6 is arranged on the rear side below the boss 12.

[0039] The boss is arranged on the rear side of the frame, the rear side of the tear-off plate is arranged on the rear side below the boss, and a longitudinal spacing is arranged between the rear side of the tear-off plate and the rear side of the boss, and the spacing value of the longitudinal spacing is the thickness of sandpaper.

[0040] The setting of the boss can quickly locate the tearing of the sandpaper. When the sandpaper needs to be torn off, the manipulator drives the sandpaper and the polishing self-adhesive disc to move so that the sandpaper is against the boss. At this time, the connection between the sandpaper and the polishing self-adhesive disc will be just above the tearing bevel. Then the manipulator drives the sandpaper and the polishing self-adhesive disc to move down. During this process, the tearing bevel is just inserted between the sandpaper and the polishing self-adhesive disc, and the sandpaper is torn off the polishing self-adhesive disc through the tearing bevel. At the same time, during this process, the tearing bevel is used to guide the torn sandpaper forward, so that it moves forward, falls from the gap, and is collected.

[0041] See also Figure 4-7 As shown, the bottom surface of the boss 12 is provided with a guide surface 13, and the guide surface 13 is arranged inwardly from top to bottom, and the inclination direction of the guide surface is the same as the inclination direction of the tearing slope. In this embodiment, the guide slope is arranged downwardly from the right rear to the front.

[0042] The guide surface is parallel to the tearing slope. When the sandpaper is guided by the tearing slope and falls, if the distance between the tearing plate and the boss is relatively small, the guide surface also plays a certain guiding role. At the same time, when the sandpaper is torn off, the sandpaper may curl upward and cause the sandpaper to stick together again, so the guide surface is used to limit the curling of the sandpaper.

[0043] See also Figure 1 , 3 As shown, a chamber 14 is provided in the machine body 1 , and the notch 9 is communicated with the chamber 14 ; a door 15 is provided on the machine body 1 , and the door 15 opens or closes the chamber 14 .

[0044] The collecting bucket can be put into the chamber to collect the torn sandpaper, and the box door can be opened and closed at the same time, which is more beautiful, convenient for the inspection of internal parts, and convenient for taking and placing the collecting bucket.

[0045] Among them, see Figure 5 , 7 As shown, a through-beam sensor 16 is also provided on the inner side of the frame 10, and a transmitting end 17 of the through-beam sensor 16 is installed above the frame 10, and a receiving end 18 of the through-beam sensor 16 is installed below the frame 10, and the transmitting end of the through-beam sensor is arranged opposite to the receiving end. After the sandpaper is torn off, it will move backwards from between the convex body and the tearing plate, and after passing through the frame, it will fall into the chamber from the notch. Due to the existence of the through-beam sensor, if the through-beam sensor is not detected during the sandpaper tearing process, it means that there is a problem, either the through-beam sensor is damaged, or the sandpaper is not torn off normally, and it will feed back the data to the manipulator, grinding equipment or back-end server, and the staff will handle it in time. More preferably, a mounting hole 19 is provided on the boss, and a photoelectric sensor is installed in the mounting hole (the photoelectric sensor is not shown in the figure). When the sandpaper is ready to be peeled off, the sandpaper will be on the rear side of the boss. The photoelectric sensor detects the sandpaper, indicating that the sandpaper is ready to be peeled off. If the corresponding sensor does not detect the sandpaper passing through the notch, it indicates that there is a problem. The data is fed back in time and the staff is notified / reminded to handle the abnormality.

[0046] See also Figure 1-3 As shown, a correction block 20 is further provided on the top of the body 1 , and an arc groove 21 is provided on the side wall of the correction block 20 .

[0047] The existence of the arc groove is used to correct the position of the grinding self-adhesive disc on the manipulator. Since the grinding self-adhesive disc is not a completely rigid material, if there is some deformation of the grinding self-adhesive disc on the manipulator, the position of the sandpaper will also deviate. Therefore, when correcting it, you can first press the grinding self-adhesive disc against the top of the correction block, and then press the side of the grinding self-adhesive disc against the side wall of the arc groove. Then the manipulator drives the grinding self-adhesive disc to rotate slightly for a few turns, so that the grinding self-adhesive disc is corrected and self-reset, so that it is basically in a qualified state, thereby ensuring the subsequent grinding quality.

[0048] See also Figure 1-3 As shown, a color sensor 22 is also provided on the side wall of the correction block 20, and the color sensor 22 is arranged on the side wall of the correction block 20 beside the arc groove 21 or on the side opposite to the arc groove 21. In this embodiment, the color sensor is arranged on the rear side wall of the correction block, and its detection end is arranged upward.

[0049] Due to the existence of the color sensor, after the robot installs the sandpaper, it needs to move to the top of the color sensor and use the color sensor to detect whether the sandpaper is installed normally. Because the color of the sandpaper is different from the color of the polishing self-adhesive disc, if the polishing self-adhesive disc cannot be installed with sandpaper normally, the product cannot be polished normally in the future to prevent missing installation. Among them, an alarm can be set on the body, or it can be linked with the robot. If it is detected that the sandpaper is not installed normally, the robot cannot perform subsequent polishing work normally.

[0050] See also Figure 1-3 As shown, the guide frame 2 includes a bottom plate 23, a top positioning ring 24 and at least two guide rods 25 parallel to each other, the bottom plate 23 is mounted on the machine body 1, the top positioning ring 24 is arranged directly above the bottom plate 23, the two ends of the guide rod 25 are respectively connected to the bottom plate 23 and the top positioning ring 24, and the discharge chamber 5 is arranged between the top positioning ring 24 and the bottom plate 23;

[0051] The support plate 3 is provided with a vertical hole matching the guide rod 25, and the support plate 3 is movably connected to the guide rod 25 through the vertical hole. The support plate 3 is arranged between the top positioning ring 24 and the bottom plate 23;

[0052] The lifting mechanism 4 includes a lifting cylinder or an electric lifting cylinder, and the bottom of the support plate 3 is connected to the top of the lifting mechanism 4 through a connecting rod 26 passing through the bottom plate 23.

[0053] In this embodiment, the lifting mechanism adopts a lifting electric cylinder. Preferably, the sandpaper with a circular structure adopts three guide rods, and the sandpaper with a square structure adopts four guide rods. For the sandpaper with a circular structure, the top positioning ring is a ring structure. If it is a sandpaper with a square structure, the top positioning ring is a square frame structure. Taking three guide rods as an example, the three guide rods are arranged in a ring, the top of the guide rod is connected to the bottom of the top positioning ring, and the bottom of the guide rod is connected to the top surface of the bottom plate (if it is a square structure, four guide rods are used, and the four guide rods are arranged as a square structure). The sandpaper is placed on the support plate, the sandpaper is between the three guide rods, and the sandpaper is arranged opposite to the inner hole of the top positioning ring. The lifting mechanism drives the support plate to rise and fall, and the sandpaper rises and falls. Among them, each time the manipulator replaces a piece of sandpaper, or after replacing a corresponding number of sandpapers, the lifting mechanism drives the support plate to rise a certain distance, so that the topmost sandpaper is at a certain height, ensuring that the manipulator can normally replace the sandpaper every time. When sandpaper needs to be added to the discharge chamber, the lifting mechanism drives the support plate to move downward, so that there is a large height difference between the support plate and the top positioning ring, and a certain amount of sandpaper can be placed, thereby reducing the frequency of adding sandpaper. Among them, when the self-adhesive grinding disc needs to be installed with sandpaper, the bottom of the self-adhesive grinding disc passes through the top positioning ring and contacts the sandpaper to achieve self-adhesive installation of the sandpaper. Of course, the positioning mechanism can also be a lifting motor or other mechanism that can drive the support plate to move up and down.

[0054] See also Figure 1 As shown, at least one through groove 27 is provided on the top of the support plate 3 , and at least two ends of the through groove 27 penetrate the outer wall of the support plate 3 .

[0055] The through groove can be a cross-shaped structure, a herringbone structure, or other structures. The through groove is set to make way for the sandpaper at the bottom, so that there is a gap between the sandpaper at the bottom and the bottom of the through groove, which makes it easier for the sandpaper at the bottom to be stuck and pulled out. At the same time, when the sandpaper is not in use and needs to be taken away manually, the staff can insert it from the through groove to lift the sandpaper upward, thereby facilitating the removal of the sandpaper.

Claims

1. An automatic sandpaper changing device, characterized in that: It includes a machine body, a sandpaper feeding mechanism and a sandpaper tearing mechanism arranged on the machine body; The sandpaper feeding mechanism comprises a guide frame, a support plate and a lifting mechanism, the top of the guide frame is provided with a discharge cavity, the support plate is movably arranged in the discharge cavity, and the lifting mechanism is configured to drive the support plate to move up and down along the discharge cavity; The sandpaper tearing mechanism includes a tearing plate, which is installed on the side wall of the machine body. A gap is provided between the middle of the tearing plate and the side wall of the machine body. The top surface of the tearing plate is a tearing slope, which is inclined downward from the outside to the inside, and a tearing angle is formed between the tearing slope and the outer side wall of the tearing plate.

2. The automatic sandpaper changing device according to claim 1, characterized in that: A notch communicating with the interior of the body is provided on the side wall of the body, a frame is installed on the notch, both sides of the tear-off plate are connected to both sides of the frame via bolts, the top of the tear-off plate is arranged opposite to the hollow part of the frame, and the tear-off slope is arranged opposite to the notch.

3. The automatic sandpaper changing device according to claim 2, characterized in that: The top of the frame is provided with an outwardly extending boss, the boss is arranged directly above the tearing inclined surface, a vertical spacing is provided between the boss and the tearing inclined surface, and the outer side surface of the tearing plate is arranged outside below the boss.

4. The automatic sandpaper changing device according to claim 3 is characterized in that: A guide surface is provided on the bottom surface of the boss, and the guide surface is arranged to be inclined inward from top to bottom, and the inclination direction of the guide surface is the same as the inclination direction of the tearing slope.

5. The automatic sandpaper changing device according to claim 2, characterized in that: A chamber is arranged in the body, and the notch is communicated with the chamber; a door is arranged on the body, and the door opens or closes the chamber.

6. The automatic sandpaper changing device according to claim 1, characterized in that: A correction block is also arranged on the top of the machine body, and an arc groove is arranged on the side wall of the correction block.

7. The automatic sandpaper changing device according to claim 6, characterized in that: A color sensor is also provided on the side wall of the correction block. The color sensor is arranged on the side wall of the correction block beside the arc groove or on the side opposite to the arc groove.

8. The automatic sandpaper changing device according to claim 1, characterized in that: The sandpaper feeding mechanism is at least one group, and a plurality of groups of the sandpaper feeding mechanisms are arranged on the machine body at intervals.

9. The automatic sandpaper changing device according to claim 1, characterized in that: The guide frame includes a bottom plate, a top positioning ring and at least two guide rods parallel to each other, the bottom plate is mounted on the machine body, the top positioning ring is arranged directly above the bottom plate, the two ends of the guide rod are respectively connected to the bottom plate and the top positioning ring, and the discharge chamber is arranged between the top positioning ring and the bottom plate; The support plate is provided with a vertical hole matching the guide rod, the support plate is movably connected to the guide rod via the vertical hole, and the support plate is arranged between the top positioning ring and the bottom plate; The lifting mechanism comprises a lifting cylinder or an electric lifting cylinder, and the bottom of the support plate is connected to the top of the lifting mechanism via a connecting rod passing through the bottom plate.

10. The automatic sandpaper changing device according to claim 1, characterized in that: At least one through groove is provided on the top of the support plate, and at least two ends of the through groove penetrate the outer wall of the support plate.

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