A porous sand paper automatic replacement device for eccentric polishing equipment and its application method

Abstract

The application discloses a kind of porous sandpaper automatic replacement device for eccentric polishing equipment, it is applicable to sandpaper tray with notch, including integral frame, tear sandpaper mechanism and at least one sandpaper supply device are equipped in integral frame;Tear sandpaper mechanism includes the upper shell and lower shell of hollow structure, lifting mechanism is equipped on the lower shell, and lifting mechanism is driven connection upper shell;Upper shell and lower shell are respectively equipped with a group of symmetrical pressing device, and two groups of pressing device are respectively driven by cylinder control;Sandpaper supply device includes fixed plate, and the top of fixed plate is fixed with the open top bin, and the bottom of fixed plate is equipped with electric cylinder, and the output end of electric cylinder is connected with lifting plate arranged in bin by passing through fixed plate.The application can realize the automatic shedding and automatic replacement of sandpaper of different specifications by cooperating with tear sandpaper mechanism and sandpaper supply device, and also can replace recycled sandpaper after sandpaper is full.

Description

Technical Field

[0001] This invention relates to a device for changing and tearing sandpaper, belonging to the technical field of processing equipment, and particularly to an automatic multi-hole sandpaper changing device for eccentric polishing equipment. Background Technology

[0002] In equipment manufacturing industries such as automobiles, high-speed rail, and aerospace, polishing of painted parts is a common requirement. Currently, this polishing is mainly done manually. Because the parts being polished are generally large, frequent changes of polishing sandpaper are necessary. Polishing is typically a multi-step process, requiring the use of different grit sandpapers of the same size, and different sizes of sandpaper are needed depending on the curvature of the workpiece. Since polishing generates a large amount of polishing dust, polishing sandpaper is usually designed with multiple holes to remove dust and prevent clogging.

[0003] While sandpaper replacement devices are available on the market, they primarily cater to concentric sandpaper, where the grinding disc is unbiased and the sandpaper is holeless, making alignment between the disc and paper easy. However, they are generally unsuitable for replacing eccentric or perforated sandpaper. The disc's eccentricity makes it difficult to center the disc during sandpaper removal, reducing the success rate and potentially requiring multiple removal attempts. Furthermore, the eccentricity and perforations make it difficult to align new sandpaper with the disc, leading to adhesion discrepancies and misaligned holes. These factors contribute to deviations in the robotic polishing process control, making it difficult to guarantee polishing quality. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-hole sandpaper automatic replacement device for eccentric polishing equipment that can automatically remove sandpaper from polishing discs with different eccentricities, automatically replace eccentric perforated sandpaper, and work with the grooved structure of the sandpaper disc to achieve automatic removal of sandpaper of different specifications and meet the sandpaper replacement needs of different robotic polishing equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic sandpaper changing device for eccentric polishing equipment, suitable for sandpaper trays with notches, includes an integral frame. The integral frame houses a sandpaper tearing mechanism and at least one sandpaper feeding device. The sandpaper tearing mechanism includes an upper shell and a lower shell, both with hollow structures. A lifting mechanism is provided on the lower shell, and the lifting mechanism is driven and connected to the upper shell. A set of symmetrical clamping devices is provided on both the upper and lower shells, and the two sets of clamping devices are respectively controlled and driven by cylinders. The sandpaper feeding device includes a fixed plate. A material hopper with an upper opening is fixed to the top of the fixed plate, and an electric cylinder is provided at the bottom of the fixed plate. The output shaft of the electric cylinder passes through the fixed plate and connects to a lifting plate located inside the material hopper.

[0007] Preferably, the lifting mechanism includes a lifting cylinder disposed under the lower housing and a cylinder drive plate disposed on the upper housing; the cylinder rod drive shaft passes through the lower housing and is movably connected to the cylinder drive plate on the upper housing.

[0008] Preferably, the hopper is provided with a fixed plate, and a positioning rod is fixedly provided at the bottom of the fixed plate. The positioning rod is located inside the hopper, and the lifting plate is movably inserted through the positioning rod. The number and position of the positioning rod are consistent with the holes on the sandpaper tray.

[0009] Preferably, the bottom of the fixed plate is provided with a second linear bearing, and the bottom of the lifting plate is connected to a second guide shaft, which passes through the second linear bearing.

[0010] Preferably, the two sets of clamping devices include an upper pressure plate device and a lower positioning device; the upper pressure plate device includes an upper rotating plate and an upper fixed plate, both of which are hollow; the inner ring of the hollow upper fixed plate has a boss, and the upper rotating plate is connected to the upper fixed plate through the boss with a gap; one side of the upper rotating plate is connected to cylinder one and cylinder two through an upper connecting hinge; a telescopic pressure plate mechanism is provided between the upper rotating plate and the upper fixed plate; the lower positioning device includes a lower rotating plate and a lower fixed plate, both of which are hollow; the inner ring of the hollow lower fixed plate has a boss, and the lower rotating plate is connected to the lower fixed plate through the boss with a gap; one side of the lower rotating plate is connected to cylinder three through a lower connecting hinge; a telescopic positioning mechanism is provided between the lower rotating plate and the lower fixed plate.

[0011] Preferably, the pressure plate mechanism and the positioning mechanism have the same structure and are arranged symmetrically in the upper and lower parts. The pressure plate mechanism includes an oblong hole on the upper rotating plate and a T-slot on the upper fixed plate. The oblong hole and the T-slot are shaped and arranged in opposite directions. A pressure plate driving pin passes through the oblong hole and the T-slot and is connected to the sandpaper pressure plate. The positioning mechanism includes an oblong hole on the lower rotating plate and a T-slot on the lower fixed plate. The oblong hole and the T-slot on the lower rotating plate and the lower fixed plate are shaped and arranged in opposite directions. A positioning plate driving pin passes through the oblong hole and the T-slot and is connected to the sandpaper positioning plate.

[0012] Preferably, the bottom of the upper outer shell is provided with a guide shaft, and the lower outer shell is provided with a linear bearing, with the guide shaft passing through the linear bearing.

[0013] Preferably, the lower outer shell of the sandpaper tearing mechanism is fixed within the overall frame by a mounting plate; the sandpaper feeding device is fixed within the overall frame by a fixing plate; the lower outer shell of the sandpaper tearing mechanism is fixed within the overall frame by a mounting plate; and the sandpaper feeding device is fixed within the overall frame by a fixing plate.

[0014] Preferably, a sandpaper storage box is provided below the sandpaper tearing mechanism, the sandpaper storage box includes a box body welded component, and a handle is provided on one side of the box body welded component.

[0015] The present invention also provides an application method for an automatic porous sandpaper changing device for an eccentric polishing equipment, the steps of which are as follows:

[0016] S1: When it is necessary to tear sandpaper, the lifting cylinder drives the cylinder drive shaft to rise through the thread; the cylinder drive shaft lifts the cylinder drive plate on the upper outer shell, realizing the separation of the upper outer shell and the lower outer shell.

[0017] S2: Cylinder three starts. Cylinder three rotates the lower rotating plate through the lower connecting hinge. The waist-shaped hole on the lower rotating plate rotates accordingly. At the same time, the positioning plate drive pin in the waist-shaped hole moves back and forth in the T-slot of the lower fixed plate, so that the sandpaper positioning plate connected to the positioning plate drive pin extends out.

[0018] S3: At this time, the equipment sends a signal to the control system, and the control system starts the sandpaper tearing mechanism. With the cooperation of external equipment, the sandpaper tray is placed into the sandpaper tearing mechanism from top to bottom. At the same time as it is placed in, the notch on the upper edge of the sandpaper tray is aligned with the sandpaper pressure plate, that is, the sandpaper pressure plate is inserted into the notch on the upper edge of the sandpaper tray, and the end face of the sandpaper tray is aligned with the upper surface of the sandpaper positioning plate.

[0019] S4: Then cylinder one and cylinder two start. Cylinder one and cylinder two rotate the upper rotating plate through the upper connecting hinge. The waist-shaped hole on the upper rotating plate rotates accordingly. At the same time, the pressure plate drive pin in the waist-shaped hole moves back and forth in the T-slot of the upper fixed plate, so that the sandpaper pressure plate connected to the pressure plate drive pin extends out.

[0020] S5: When the sandpaper pressure plate extends to its position, the lifting cylinder drives the cylinder drive shaft to descend through the thread; the cylinder drive plate on the upper shell also descends accordingly, realizing the merging of the upper and lower shells. Since the sandpaper pressure plate is inserted into the notch of the sandpaper tray, the sandpaper pressure plate and the sandpaper positioning plate will clamp the sandpaper on the sandpaper tray at this time, that is, the sandpaper pressure plate presses down on the top of the sandpaper, and the sandpaper positioning plate clamps down on the bottom of the sandpaper.

[0021] S6: Then, with the help of external equipment, the sandpaper tray is pushed upward and retracted. The sandpaper on the sandpaper tray is torn off by the sandpaper pressure plate and the sandpaper positioning plate. Then, cylinders one, two, and three retract, and the sandpaper will automatically fall into the sandpaper storage box at the bottom of the sandpaper tearing mechanism, completing the entire sandpaper tearing process.

[0022] When sandpaper needs to be glued, the external equipment controls the alignment of the four holes on the sandpaper tray with the four positioning rods, aligning the lower surface of the sandpaper tray with the upper part of the hopper. Then, the electric cylinder drives the lifting plate to rise, thereby lifting the sandpaper in the hopper and sticking it to the sandpaper tray. Under the force of the electric cylinder, the sandpaper in the hopper and the sandpaper tray are glued together, completing the sandpaper gluing process.

[0023] Furthermore, when the sandpaper in the hopper is consumed, the overall height of the sandpaper in the hopper will decrease. At this time, by controlling the internal program to change the lifting height of the electric cylinder, the change in the height of the sandpaper can be perfectly compensated, which facilitates the subsequent application of sandpaper.

[0024] When sandpaper needs to be replaced, the external device controls the sandpaper tray to the sandpaper tearing mechanism to perform the sandpaper tearing process. After the sandpaper is successfully torn, it needs to be detected by the detection sensor to confirm that the sandpaper has been torn off. Then, the external device controls the sandpaper tray to the sandpaper feeding device of the corresponding size to perform the sandpaper sticking process. After the sandpaper is successfully sticking, it also needs to be detected by the detection sensor to confirm that the sandpaper has been stuck on.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention enables the automatic removal of sandpaper from polishing discs with varying eccentricities, while ensuring a high success rate for sandpaper removal on the first attempt.

[0027] This invention enables automatic replacement of eccentric perforated sandpaper while ensuring that the sandpaper holes are aligned.

[0028] This invention enables the automatic detachment of sandpaper of different sizes by moving the sandpaper pressure plate and cooperating with the sandpaper positioning plate. Combined with the grooved structure of the sandpaper grinding disc, it can ensure the success rate of sandpaper detachment.

[0029] This invention can adapt to different robot polishing sandpaper replacement needs by configuring sandpaper tearing mechanisms and sandpaper feeding devices of different specifications.

[0030] This invention enables the automatic shedding and replacement of sandpaper of different specifications by using a sandpaper tearing mechanism and a sandpaper feeding device in conjunction with each other. It can also replace and recycle sandpaper after the sandpaper is full. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of an automatic porous sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0032] Figure 2 This is a schematic diagram of the overall frame structure of an automatic porous sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0033] Figure 3 This is a three-dimensional structural diagram of the sandpaper tearing mechanism in an automatic sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0034] Figure 4 This is a top view schematic diagram of the sandpaper tearing mechanism in an automatic sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0035] Figure 5 This is an exploded structural diagram of the sandpaper tearing mechanism in a porous sandpaper automatic changing device for an eccentric polishing equipment proposed in this invention.

[0036] Figure 6 This is a schematic diagram of the upper cover plate structure of the sandpaper tearing mechanism in a porous sandpaper automatic changing device for an eccentric polishing equipment proposed in this invention.

[0037] Figure 7 This is a schematic diagram of the upper rotating plate structure of the sandpaper tearing mechanism in an automatic sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0038] Figure 8 This is a schematic diagram of the upper fixing plate structure of the sandpaper tearing mechanism in an automatic sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0039] Figure 9 This is a schematic diagram of the upper outer shell structure of the sandpaper tearing mechanism in a porous sandpaper automatic changing device for an eccentric polishing equipment proposed in this invention.

[0040] Figure 10 This is a schematic diagram of the sandpaper pressure plate structure of the sandpaper tearing mechanism in an automatic sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0041] Figure 11 This is a cross-sectional schematic diagram of the sandpaper tearing mechanism in a porous sandpaper automatic changing device for an eccentric polishing equipment proposed in this invention.

[0042] Figure 12 for Figure 11 A detailed magnified structural diagram of part A;

[0043] Figure 13 This is a three-dimensional structural diagram of the sandpaper feeding device in a porous sandpaper automatic changing device for an eccentric polishing equipment proposed in this invention.

[0044] Figure 14This is a left-side view of the sandpaper feeding device in an automatic porous sandpaper changing device for an eccentric polishing equipment proposed in this invention.

[0045] Figure 15 This is a schematic diagram of the sandpaper storage box in a porous sandpaper automatic changing device for an eccentric polishing equipment proposed in this invention.

[0046] Figure 16 This is a schematic diagram of the overall frame structure of an automatic porous sandpaper changing device for an eccentric polishing equipment proposed in this invention. Figure 1 ;

[0047] Figure 17 This is a schematic diagram of the overall frame structure of an automatic porous sandpaper changing device for an eccentric polishing equipment proposed in this invention. Figure 2 .

[0048] The serial numbers in the diagram are as follows:

[0049] Sandpaper tearing mechanism; 101. Cylinder 1; 102. Cylinder 2; 103. Upper connecting hinge; 104. Upper cover plate; 105. Cylinder drive plate; 106. Upper outer shell; 107. Lower outer shell; 108. Lower connecting hinge; 109. Cylinder 3; 110. Cylinder mounting plate 1; 111. Mounting plate; 112. Guide shaft 1; 113. Linear bearing 1; 114. Transition plate; 115. Cylinder mounting plate 2; 116. Upper rotating plate; 117. Upper fixed plate; 118. Pressure plate drive pin; 119. Sandpaper pressure plate; 120. Cylinder drive shaft; 121. Lower fixed plate; 122. Sandpaper positioning plate; 123. Positioning plate drive pin; 124. Lower rotating plate; 125. Lower cover plate; 126. Lifting cylinder; 127. T-slot; 128. Waist-shaped hole; 129. Mounting hole;

[0050] Sandpaper feeding device; 201, hopper; 202, lifting plate; 203, fixing plate; 204, linear bearing II; 205, guide shaft II; 206, electric cylinder; 207, positioning rod;

[0051] Sandpaper storage box; 301, box body welded parts; 302, handle;

[0052] Overall frame; 401, Aluminum profile frame; 402, Top cover plate; 403, Hinges; 404, Loading door; 405, Front cover plate; 406, Left side cover plate; 407, Left inspection door; 408, Right inspection door; 409, Height adjustment components; 410, Foot fixing components; 411, Detection sensor assembly; 412, Unloading door; 413, Right side cover plate; 414, Back cover plate;

[0053] Sandpaper tray. Detailed Implementation

[0054] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0055] like Figures 1 to 17 As shown, the present invention provides an automatic perforated sandpaper changing device for an eccentric polishing equipment, which is suitable for a sandpaper tray 5 with notches along the edge, and includes a sandpaper tearing mechanism 1, a sandpaper feeding device 2, a sandpaper storage box 3, and an overall frame 4.

[0056] The sandpaper tearing mechanism 1 and the sandpaper feeding device 2 are fixed to the overall frame 4 by bolts. The sandpaper tearing mechanism 1 includes a hollow upper shell 106 and a hollow lower shell 107. The lower shell 107 is equipped with a lifting mechanism, which includes a lifting cylinder 126 threadedly installed under the lower shell 107 and a cylinder drive plate 105 mounted on the upper shell 106. The cylinder drive shaft 120 is threadedly connected to the lifting cylinder 126. The cylinder drive shaft 120 passes through the lower shell 107 and is movably connected to the cylinder drive plate 105 on the upper shell 106. When the lifting cylinder 126 is ventilated, the cylinder drive shaft 120 moves up and down through the thread, lifting the cylinder drive plate 105 on the upper shell 106 through the pneumatic rod drive shaft 120, thereby separating the upper shell 106 from the lower shell 107.

[0057] An upper pressure plate device and a lower positioning device are respectively installed on the upper outer shell 106 and the lower outer shell 107. The upper pressure plate device is located directly above the lower positioning device. The upper pressure plate device and the lower positioning device have the same structure and are symmetrically installed on the upper outer shell 106 and the lower outer shell 107. The upper pressure plate device includes an upper rotating plate 116 and an upper fixed plate 117. Both the upper rotating plate 116 and the upper fixed plate 117 are hollow. The inner ring of the hollow upper fixed plate 117 is provided with a boss. The upper rotating plate 116 is connected to the upper fixed plate 117 through the boss. One side of the upper rotating plate 116 has an extended structure. The extended structure is provided with a mounting hole 129. The mounting hole 129 is connected to cylinder 101 and cylinder 102 through an upper connecting hinge 103. Cylinder 101, cylinder 102 and connecting hinge 103 are connected by a pin. They are fixedly installed on the upper outer shell 106 through a transition plate 114 and cylinder mounting plate 115. A retractable pressure plate mechanism is provided between the upper rotating plate 116 and the upper fixed plate 117; the rotation of the upper rotating plate 116 is driven by cylinder 101 and cylinder 2102, which in turn drives the pressure plate mechanism between the upper rotating plate 116 and the upper fixed plate 117 to extend and retract, and together with the cylinder drive plate 105, a sandpaper pressure plate motion mechanism is formed.

[0058] The lower positioning device includes a lower rotating plate 124 and a lower fixed plate 121, both of which are hollow structures. The inner ring of the hollow lower fixed plate 121 is provided with a boss, and the lower rotating plate 124 is connected to the lower fixed plate 121 through the boss with a gap. One side of the lower rotating plate 124 is an extended structure, which is also provided with a mounting hole. The mounting hole is connected to a cylinder 109 through a lower connecting hinge 108 and a pin, and is fixedly installed to the lower outer shell 107 through a cylinder mounting plate 110. The cylinder 109 controls the extension and retraction of the positioning mechanism between the lower rotating plate 124 and the lower fixed plate 121 to form a sandpaper positioning motion mechanism.

[0059] Furthermore, the pressure plate mechanism and positioning mechanism provided by the present invention have the same structure and are arranged symmetrically in the upper and lower parts. The pressure plate mechanism includes an oblong hole 128 provided on the upper rotating plate 116 and a T-slot 127 provided on the upper fixed plate 117. The oblong hole 128 and the T-slot 127 are shaped correspondingly and arranged in opposite directions. A pressure plate driving pin 118 is inserted into the oblong hole 128 and the T-slot 127. The pressure plate driving pin 118 is installed on the sandpaper pressure plate 119 through a pin hole with an interference fit, and the two form a whole. The sandpaper pressure plate 119 9. The pressure plate drive pin 118 can move back and forth in the T-slot 127 of the upper fixed plate 117. The upper end of the pressure plate drive pin 118 is clearance-fitted with the oblong hole 128 of the upper rotating plate 116, and can move back and forth in the oblong hole 128. Since the oblong hole 128 and the T-slot 127 are set in opposite directions, i.e., there is an angle, when the upper rotating plate 116 rotates clockwise or counterclockwise under the drive of cylinder 101 and cylinder 2102, it will drive the pressure plate drive pin 118 and the sandpaper pressure plate 119 to move back and forth in the T-slot 127.

[0060] The positioning mechanism has the same structure as the pressure plate mechanism, including an oblong hole on the lower rotating plate 124 and a T-slot on the lower fixed plate 121. The oblong hole and T-slot on the lower rotating plate 124 and the lower fixed plate 121 are shaped and arranged in opposite directions. A positioning plate drive pin 123 is inserted into the oblong hole 128 and the T-slot 127. The positioning drive pin 123 is installed on the sandpaper positioning plate 122 through a pin hole with an interference fit, and the two form a whole. The sandpaper positioning plate 122 can move back and forth in the T-slot of the lower fixed plate 121 through the positioning drive pin 123. The upper end of the positioning plate drive pin 123 is clearance-fitted with the oblong hole of the lower rotating plate 124, and can move back and forth in the oblong hole. When the lower rotating plate 124 rotates clockwise or counterclockwise under the drive of the cylinder, it will drive the positioning plate drive pin 123 and the sandpaper positioning plate 122 to move back and forth in the T-slot.

[0061] Furthermore, the upper rotating plate 116 and the lower rotating plate 124 provided by the present invention are respectively provided with an upper cover plate 104 and a lower cover plate 125; the upper cover plate 104, the upper outer shell 106, and the upper fixing plate 117 are fixedly connected by screws; the upper rotating plate 116 can rotate freely in the gap connection between the upper cover plate 104 and the upper fixing plate 117. The lower outer shell 107, the lower fixing plate 121, and the lower cover plate 125 are fixedly connected by screws; the lower rotating plate 124 is installed on the lower fixing plate 121 through a clearance fit, and can rotate freely in the gap between the lower cover plate 125 and the lower fixing plate 121.

[0062] Furthermore, the sandpaper tearing mechanism 1 provided by the present invention has a sandpaper storage box 3 below it. The sandpaper storage box 3 includes a box body welded component 301, and a handle 302 is provided on one side of the box body welded component 3. The storage box 3 serves to recycle old sandpaper. The handle 302 allows the storage box 3 to be easily removed for regular cleaning of waste sandpaper.

[0063] Furthermore, in order to enable guided vertical displacement when the upper outer shell 106 is separated from the lower outer shell 107, the upper end of the guide shaft 112 is fixedly installed on the upper outer shell 106 with screws, and the linear bearing 113 is fixedly installed on the lower outer shell 107 with screws. The guide shaft 112 passes through the linear bearing 113 and can slide up and down in the linear bearing 113, thereby driving the entire sandpaper pressure plate motion mechanism to move up and down.

[0064] The sandpaper feeding device 2 is located on one side of the sandpaper tearing mechanism 1. The sandpaper feeding device 2 includes a fixed plate 203. The top of the fixed plate 203 is fixedly mounted with a material hopper 201 with an opening by screws. The bottom of the fixed plate 203 is provided with an electric cylinder 206. The output shaft of the electric cylinder 206 passes through the fixed plate 203 and is connected to a lifting plate 202 located in the material hopper 201.

[0065] Furthermore, the bottom of the fixing plate 203 provided by the present invention is fixed with a positioning rod 207. The positioning rod 207 is installed in the hopper 201 by screws. The lifting plate 202 is movably inserted through the positioning rod 207. The number and position of the positioning rod 207 are consistent with the holes on the sandpaper tray 5. The positioning rod 207 can provide coarse positioning for the sandpaper, making it easy to accurately stick the sandpaper to the sandpaper tray when applying it. In addition, two sets of sandpaper feeding devices 2 can be used. The two sets of sandpaper feeding devices 2 use hoppers with different diameter sandpaper replacements. For different sizes of sandpaper, only the hoppers and lifting plates of different sizes need to be replaced for quick switching.

[0066] Furthermore, to enable the lifting plate 202 to achieve guided displacement during lifting, the bottom of the fixed plate 203 provided by the present invention is fitted with a linear bearing 204 by screws. The bottom of the lifting plate 202 is connected to three guide shafts 205 by screws. The guide shafts 205 pass through the linear bearings 204, providing guidance for the up-and-down movement of the lifting plate 202. The lifting plate 202 and the guide shafts 205 can move up and down under the drive of the electric cylinder 206.

[0067] Furthermore, the overall frame 4 provided by the present invention includes an aluminum profile frame 401, an upper cover plate 402, a hinge 403, a feeding door 404, a front cover plate 405, a left side cover plate 406, a left inspection door 407, a right inspection door 408, a height adjustment component 409, a foot fixing component 410, a material return door 412, a right side cover plate 413, and a rear cover plate 414. The lower outer shell 107 of the sandpaper tearing mechanism 1 is fixed to the sandpaper tearing mechanism 1 within the overall frame 4 by a mounting plate 111; the sandpaper feeding device 2 is fixed to the aluminum profile frame 401 of the overall frame 4 by a fixing plate 203. Detection sensor assemblies 411 are respectively installed on one side of the sandpaper tearing mechanism 1 and the sandpaper feeding device 2. The detection sensor assemblies 411 are fixed to the aluminum profile frame 401 by screws and can detect whether the sandpaper replacement is successful. The aluminum profile frame 401 is connected to the height adjustment component 409 and the foot fixing component 410 by screws, allowing for easy adjustment of the equipment's height and fixation to the ground. The top cover 402, front cover 405, left side cover 406, right side cover 413, and back cover 414 are all fixed to the aluminum profile frame 401 by screws, protecting the internal components of the equipment. The loading door 404, left inspection door 407, right inspection door 408, and unloading door 412 are all installed to the aluminum profile frame 401 by hinges 403, and can be opened and closed by handles or fixed magnetically, serving various functions such as inspection, loading, and unloading.

[0068] The working principle of this invention is as follows:

[0069] S1: When it is necessary to tear sandpaper, the lifting cylinder 126 drives the cylinder drive shaft 120 to rise through the thread; the cylinder drive shaft 120 lifts the cylinder drive plate 105 on the upper outer shell 106, so as to separate the upper outer shell 106 from the lower outer shell 107.

[0070] S2: Cylinder 3 109 starts, and cylinder 3 109 rotates the lower rotating plate 124 through the lower connecting hinge 108. The waist-shaped hole on the lower rotating plate 124 rotates accordingly. The positioning plate drive pin 123 in the waist-shaped hole moves back and forth in the T-slot of the lower fixed plate 121, thereby causing the sandpaper positioning plate 122 connected to the positioning plate drive pin 123 to extend out.

[0071] S3: At this time, the equipment sends a signal to the control system, and the control system starts the sandpaper tearing mechanism 1. With the cooperation of external equipment, the sandpaper tray 5 is placed into the sandpaper tearing mechanism 1 from top to bottom. At the same time as it is placed in, the notch on the upper edge of the sandpaper tray 5 is aligned with the sandpaper pressure plate 119 (that is, the sandpaper pressure plate 119 is inserted into the notch on the upper edge of the sandpaper tray 5), and the end face of the sandpaper tray 5 is aligned with the upper surface of the sandpaper positioning plate 122.

[0072] S4: Then cylinder 101 and cylinder 2102 are started. Cylinder 101 and cylinder 2102 rotate the upper rotating plate 116 through the upper connecting hinge 103. The waist-shaped hole 128 on the upper rotating plate 116 rotates accordingly. The pressure plate drive pin 118 in the waist-shaped hole 128 moves back and forth in the T-slot 127 of the upper fixed plate 117, so that the sandpaper pressure plate 119 connected to the pressure plate drive pin 118 extends out.

[0073] S5: When the sandpaper pressure plate 119 extends to the position, the lifting cylinder 126 drives the cylinder drive shaft 120 to descend through the thread; the cylinder drive plate 105 on the upper outer shell 106 also descends accordingly, realizing the merging of the upper outer shell 106 and the lower outer shell 107. Since the sandpaper pressure plate 119 is inserted into the notch of the sandpaper tray 5, the sandpaper pressure plate 119 and the sandpaper positioning plate 122 will clamp the sandpaper on the sandpaper tray 5 at this time, that is, the sandpaper pressure plate 119 presses down on the top of the sandpaper, and the sandpaper positioning plate 122 clamps down on the bottom of the sandpaper.

[0074] S6: Then, with the help of external equipment, the sandpaper tray 5 is pushed upward and retracted. The sandpaper on the sandpaper tray 5 is torn off by the sandpaper pressure plate 119 and the sandpaper positioning plate 122. Then, cylinders 101, 102, and 109 retract, and the sandpaper will automatically fall into the sandpaper storage box 3 at the bottom of the sandpaper tearing mechanism 1, completing the entire sandpaper tearing process.

[0075] When sandpaper needs to be applied, the external equipment controls the alignment of the four holes on the sandpaper tray 5 with the four positioning rods 207, and the lower surface of the sandpaper tray 5 is aligned with the upper part of the hopper 201. Then, the electric cylinder 206 drives the lifting plate 202 to rise, thereby lifting the sandpaper in the hopper 201 and sticking it to the sandpaper tray 5. Under the force of the electric cylinder 206, the sandpaper in the hopper 201 and the sandpaper tray 5 are bonded together, completing the sandpaper application process.

[0076] Furthermore, when the sandpaper in the hopper 201 is consumed, the overall height of the sandpaper in the hopper 201 will decrease. At this time, by controlling the internal program to change the lifting height of the electric cylinder 206, the change in the height of the sandpaper can be perfectly compensated, which facilitates the subsequent pasting of sandpaper.

[0077] Furthermore, when sandpaper needs to be replaced, the external device controls the sandpaper tray 5 to the sandpaper tearing mechanism 1 to perform the sandpaper tearing process. After the sandpaper is successfully torn, it needs to be detected by the detection sensor assembly 411 to confirm that the sandpaper has been torn off. Then, the external device controls the sandpaper tray 5 to the sandpaper feeding device 2 of the corresponding size to perform the sandpaper sticking process. After the sandpaper sticking is successfully done, it also needs to be detected by the detection sensor assembly 411 to confirm that the sandpaper has been stuck on.

[0078] The present invention has the following beneficial effects:

[0079] This invention enables the automatic removal of sandpaper from polishing discs with varying eccentricities, while ensuring a high success rate for sandpaper removal on the first attempt.

[0080] This invention enables automatic replacement of eccentric perforated sandpaper while ensuring that the sandpaper holes are aligned.

[0081] This invention enables the automatic detachment of sandpaper of different sizes by moving the sandpaper pressure plate and cooperating with the sandpaper positioning plate. Combined with the grooved structure of the sandpaper grinding disc, it can ensure the success rate of sandpaper detachment.

[0082] This invention can adapt to different robot polishing sandpaper replacement needs by configuring sandpaper tearing mechanisms and sandpaper feeding devices of different specifications.

[0083] This invention, through the cooperation of a sandpaper tearing mechanism and a sandpaper feeding device, enables the automatic detachment and replacement of sandpaper of different specifications. It also allows for the replacement and recycling of sandpaper once the container is full. The sandpaper tearing mechanism 1 provided by this invention is suitable for replacing sandpaper with diameters of 125mm and 150mm. It only requires controlling the extension and retraction of cylinders 101 and 102 to accommodate different sizes of sandpaper, and no manual operation is required.

[0084] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic perforated sandpaper changing device for an eccentric polishing equipment, suitable for a sandpaper tray (5) with notches, comprising an integral frame (4), characterized in that, The overall frame (4) is provided with a sandpaper tearing mechanism (1) and at least one sandpaper feeding device (2); the sandpaper tearing mechanism (1) includes an upper shell (106) and a lower shell (107) both of which are hollow structures. The lower shell (107) is provided with a lifting mechanism, which drives and connects to the upper shell (106); the upper shell (106) and the lower shell (107) are respectively provided with a set of symmetrical clamping devices, and the two sets of clamping devices are respectively driven by a cylinder; the sandpaper feeding device (2) includes a fixed plate (203), the top of the fixed plate (203) is fixed with a material bin (201) with an upper opening, the bottom of the fixed plate (203) is provided with an electric cylinder (206), and the output shaft of the electric cylinder (206) passes through the fixed plate (203) and connects to the lifting plate (202) provided in the material bin (201). The two sets of clamping devices include an upper pressure plate device and a lower positioning device; the upper pressure plate device includes an upper rotating plate (116) and an upper fixed plate (117), both of which are hollow structures; the upper fixed plate (117) has a boss on its inner ring, and the upper rotating plate (116) is connected to the upper fixed plate (117) with a gap through the boss; one side of the upper rotating plate (116) is connected to cylinder one (101) and cylinder two (102) through an upper connecting hinge (103); the upper rotating plate (116) and the upper fixed plate (117) are connected to each other with a gap through the boss. A telescopic pressure plate mechanism is provided between 117); the lower positioning device with a hollow structure includes a lower rotating plate (124) and a lower fixed plate (121); a boss is provided on the inner ring of the hollow lower fixed plate (121), and the lower rotating plate (124) is connected to the lower fixed plate (121) through the boss; one side of the lower rotating plate (124) is connected to the cylinder three (109) through a lower connecting hinge (108); a telescopic positioning mechanism is provided between the lower rotating plate (124) and the lower fixed plate (121); The pressure plate mechanism and the positioning mechanism have the same structure and are arranged symmetrically in the upper and lower parts. The pressure plate mechanism includes an oblong hole (128) on the upper rotating plate (116) and a T-slot (127) on the upper fixed plate (117). The oblong hole (128) and the T-slot (127) are shaped and arranged in opposite directions. A pressure plate driving pin (118) passes through the oblong hole (128) and the T-slot (127). The pressure plate driving pin (118) connects to... Sandpaper pressure plate (119); The positioning mechanism includes a waist-shaped hole on the lower rotating plate (124) and a T-shaped groove on the lower fixed plate (121). The waist-shaped hole and the T-shaped groove on the lower rotating plate (124) and the lower fixed plate (121) are shaped and arranged in opposite directions. A positioning plate drive pin (123) passes through the waist-shaped hole (128) and the T-shaped groove (127). The positioning plate drive pin (123) is connected to the sandpaper positioning plate (122).

2. The automatic porous sandpaper changing device for an eccentric polishing equipment according to claim 1, characterized in that, The lifting mechanism includes a lifting cylinder (126) disposed under the lower housing (107) and a cylinder drive plate (105) disposed on the upper housing (106); the air rod drive shaft (120) of the lifting cylinder (126) passes through the lower housing (107) and is movably connected to the cylinder drive plate (105) on the upper housing (106).

3. The automatic porous sandpaper changing device for an eccentric polishing equipment according to claim 2, characterized in that, The hopper (201) is provided with a fixed plate (203), and a positioning rod (207) is fixed at the bottom of the fixed plate (203). The positioning rod (207) is located inside the hopper (201), and the lifting plate (202) is movably inserted through the positioning rod (207). The number and position of the positioning rod (207) are consistent with the hole positions on the sandpaper tray (5).

4. An automatic porous sandpaper changing device for an eccentric polishing equipment according to any one of claims 1 or 3, characterized in that, The bottom of the fixed plate (203) is provided with a linear bearing (204), and the bottom of the lifting plate (202) is connected to a guide shaft (205), which passes through the linear bearing (204).

5. The automatic porous sandpaper changing device for an eccentric polishing equipment according to claim 1, characterized in that, The bottom of the upper outer shell (106) is provided with a guide shaft (112), and the lower outer shell (107) is provided with a linear bearing (113). The guide shaft (112) passes through the linear bearing (113).

6. The automatic porous sandpaper changing device for an eccentric polishing equipment according to claim 1, characterized in that, The lower outer shell (107) of the sandpaper tearing mechanism (1) is fixed in the overall frame (4) by the mounting plate (111); the sandpaper feeding device (2) is fixed in the overall frame (4) by the fixing plate (203).

7. The automatic porous sandpaper changing device for an eccentric polishing equipment according to claim 1, characterized in that, The sandpaper tearing mechanism (1) is provided with a sandpaper storage box (3) below it. The sandpaper storage box (3) includes a box assembly (301) and a handle (302) is provided on one side of the box assembly (301).

8. A method for using the automatic porous sandpaper changing device for an eccentric polishing equipment as described in claim 3, characterized in that, The steps are as follows: S1: When it is necessary to tear sandpaper, the lifting cylinder (126) drives the cylinder drive shaft (120) to rise through the thread; the cylinder drive shaft (120) lifts the cylinder drive plate (105) on the upper shell (106) to separate the upper shell (106) from the lower shell (107); S2: Cylinder 3 (109) starts, and cylinder 3 (109) rotates the lower rotating plate (124) through the lower connecting hinge (108). The waist-shaped hole on the lower rotating plate (124) rotates accordingly. The positioning plate drive pin (123) in the waist-shaped hole moves back and forth in the T-slot of the lower fixed plate (121), so that the sandpaper positioning plate (122) connected to the positioning plate drive pin (123) extends out. S3: At this time, the equipment sends a signal to the control system, and the control system starts the sandpaper tearing mechanism (1). With the cooperation of external equipment, the sandpaper tray (5) is placed into the sandpaper tearing mechanism (1) from top to bottom. At the same time as it is placed in, the notch on the upper edge of the sandpaper tray (5) is aligned with the sandpaper pressure plate (119). That is, the sandpaper pressure plate (119) is inserted into the notch on the upper edge of the sandpaper tray (5), and the end face of the sandpaper tray (5) is aligned with the upper surface of the sandpaper positioning plate (122). S4: Then cylinder one (101) and cylinder two (102) start. Cylinder one (101) and cylinder two (102) rotate the upper rotating plate (116) through the upper connecting hinge (103). The waist-shaped hole (128) on the upper rotating plate (116) rotates accordingly. The pressure plate drive pin (118) in the waist-shaped hole (128) moves back and forth in the T-slot (127) of the upper fixed plate (117), so that the sandpaper pressure plate (119) connected to the pressure plate drive pin (118) extends out. S5: When the sandpaper pressure plate (119) extends into place, the lifting cylinder (126) drives the cylinder drive shaft (120) to descend through the thread; the cylinder drive plate (105) on the upper shell (106) also descends, realizing the merging of the upper shell (106) and the lower shell (107). Since the sandpaper pressure plate (119) is inserted into the notch of the sandpaper tray (5), the sandpaper pressure plate (119) and the sandpaper positioning plate (122) will clamp the sandpaper on the sandpaper tray (5), that is, the sandpaper pressure plate (119) presses the top of the sandpaper, and the sandpaper positioning plate (122) clamps the bottom of the sandpaper. S6: Then, by using external equipment to control the sandpaper tray (5) to move upwards, the sandpaper on the sandpaper tray (5) is torn off by the sandpaper pressure plate (119) and the sandpaper positioning plate (122). Then, cylinder one (101), cylinder two (102), and cylinder three (109) all retract, and the sandpaper will automatically fall into the sandpaper storage box (3) at the bottom of the sandpaper tearing mechanism (1), completing the entire sandpaper tearing process. When sandpaper needs to be glued, the external equipment controls the four holes on the sandpaper tray (5) to align with the four positioning rods (207), the lower surface of the sandpaper tray (5) is aligned with the upper part of the hopper (201), and then the electric cylinder (206) drives the lifting plate (202) to rise, thereby lifting the sandpaper in the hopper (201) and sticking it to the sandpaper tray (5). Under the force of the electric cylinder (206), the sandpaper in the hopper (201) and the sandpaper tray (5) are glued together, completing the sandpaper gluing process. Furthermore, when the sandpaper in the hopper (201) is consumed, the overall height of the sandpaper in the hopper (201) will become shorter. At this time, by controlling the internal program, the lifting height of the electric cylinder (206) can be changed to perfectly compensate for the change in the height of the sandpaper, which is convenient for subsequent pasting of sandpaper. When sandpaper needs to be replaced, the external device controls the sandpaper tray (5) to the sandpaper tearing mechanism (1) to perform the sandpaper tearing process. After the sandpaper is successfully torn, it needs to be detected by the detection sensor assembly (411) to confirm that the sandpaper has been torn off. Then, the external device controls the sandpaper tray (5) to the sandpaper feeding device (2) of the corresponding size to perform the sandpaper sticking process. After the sandpaper is successfully sticking, it also needs to be detected by the detection sensor assembly (411) to confirm that the sandpaper has been stuck on.

Images