Surface polishing device with cleaning function for aluminum cylinder production

Abstract

The invention relates to the technical field of aluminum cylinder production equipment, and discloses a surface polishing device with a cleaning function for aluminum cylinder production. Comprising a gas expansion type positioning mechanism, an elastic abutting type pre-tightening mechanism, a sponge wiping body and a spiral spring, wherein the sponge wiping body abuts against the bottom surface of the flexible grinding belt and can wipe residues on the surface of the flexible grinding belt, and the spiral spring provides upward elastic pressure for the sponge wiping body. According to the surface grinding device with the cleaning function for aluminum cylinder production, the outer circumferential face of an aluminum cylinder is ground through a flexible grinding belt, and the flexible grinding belt in part of the area can be attached to the outer portion of the aluminum cylinder in a wrapping mode, so that the grinding area and the bending degree of the aluminum cylinder are improved, and the grinding efficiency is improved. And the bending degree can be adaptively changed along with the contact surfaces of the aluminum cylinders with different sizes, so that the aluminum cylinders with different sizes can be effectively ground, and the grinding application range of the equipment is widened.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum tube production equipment, in particular to a surface grinding device for aluminum tube production with a cleaning function. Background Art

[0002] The aluminum cylinder is a cylinder with two ends open. It is widely used in industry. During its production process, it needs to be polished and rust-removed on the surface to facilitate subsequent operations. The traditional aluminum cylinder polishing device has low polishing efficiency, requires manual clamping, is complicated and troublesome to operate, and has a long polishing cycle. In addition, the polishing plate used for polishing is troublesome to replace. Therefore, a surface polishing device for aluminum cylinder production and processing is needed.

[0003] For example, a Chinese patent with publication number "CN210209975U" discloses "a surface grinding device for the production and processing of aluminum cylinder barrels", whose main structure includes a base plate, a left clamping device is arranged on the left side of the upper end surface of the base plate, a rotating feeding device is arranged on the right side of the upper end of the base plate, a bottom grinding device is arranged between the left clamping device and the rotating feeding device, a vertical plate is arranged on the rear side of the left clamping device and the rotating feeding device, and a side grinding device is installed on the vertical plate. The structure is simple, the cylinder barrel is manually sleeved on the rotating sleeve joint, and the cylinder barrel is clamped in combination with the left clamping device, and the high-speed rotation of the cylinder barrel is controlled by the second motor, and the side grinding device and the bottom grinding device grind the high-speed rotating cylinder barrel, which is convenient for manual material taking and discharging. In addition, the grinding plate and the arc-shaped base plate are fixedly connected by bolts, which is convenient for replacement and maintenance, and the inclined groove facilitates the automatic discharge and collection of waste after grinding.

[0004] When the above-mentioned surface grinding device for the production and processing of the aluminum cylinder is working, it utilizes the bottom grinding device that abuts against the outer periphery of the bottom of the aluminum cylinder to grind the outer circumference of the aluminum cylinder. However, a single bottom grinding device needs to be matched with an aluminum cylinder of a specific size for grinding. Therefore, the applicability range of the above-mentioned surface grinding device is relatively narrow. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a surface polishing device for aluminum cylinder production with a cleaning function, which utilizes a flexible polishing belt to polish the outer circumferential surface of the aluminum cylinder, and the flexible polishing belt in a partial area can be attached to the outside of the aluminum cylinder in a wrapped manner, thereby increasing the polishing area and the degree of curvature of the aluminum cylinder, and the degree of curvature can adaptably change with the contact surfaces of aluminum cylinders of different sizes, thereby taking effective polishing measures for aluminum cylinders of different sizes, improving the polishing adaptability of the equipment, and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a surface grinding device for aluminum tube production with a cleaning function, comprising a driving roller that can rotate with an external motor, a driven roller located on one side of the driving roller and can rotate with the driving roller, and a flexible grinding belt that can be placed between the driving roller and the driven roller in a circular closed manner and can generate a circular rotation when the driving roller rotates, and also includes a gas expansion positioning mechanism, the interior of which is provided with a hollow cylinder that can be inserted into the center area of ​​the aluminum tube and is in a hollow state, and an edge-sealed installation on the hollow cylinder. The outer circumferential surface expands outward when subjected to gas pressure, thereby abutting against the elastic airbag at the inner wall of the circumference of the aluminum cylinder and a fixed ring installed on the outer periphery of one end of the hollow cylinder and capable of supporting the hollow cylinder; and an elastic abutment-type pre-tightening mechanism, the interior of which is provided with a limiting roller capable of downwardly limiting the inner surface of the flexible grinding belt, thereby keeping the flexible grinding belt in a taut state, a sponge wiping body abutting against the bottom surface of the flexible grinding belt and capable of wiping the residue on the surface of the flexible grinding belt, and a spiral spring providing upward elastic pressure to the sponge wiping body.

[0007] Preferably, the gas expansion positioning mechanism includes a fixed ring, the bottom of the fixed ring is provided with a No. 1 connecting plate which is an integral structure with it and extends upward, the annular hole of the fixed ring is provided with a rotatable connecting shaft structure through a bearing, the connecting shaft structure is provided with a hollow cylinder which is an integral structure with it at the end directly above the flexible grinding belt, the interior of the hollow cylinder is provided with a gas storage cavity, the interior of the connecting shaft structure is provided with a No. 1 gas flow channel which connects the external space and one end of the gas storage cavity and is equipped with a gas valve, the outer circumferential surface of the hollow cylinder is fixedly installed with an elastic airbag through a fixed ring, and the circumferential wall thickness of the hollow cylinder is provided with a plurality of gas flow gaps which connect the inner side of the elastic airbag and the gas storage cavity.

[0008] Preferably, the length of the hollow cylinder is smaller than the length of the aluminum cylinder, and the length of the aluminum cylinder is smaller than the width of the flexible grinding belt.

[0009] Preferably, the two fixing rings fix the two end regions of the elastic airbag to the outer circumferential surface of the hollow cylinder in a sealing manner.

[0010] Preferably, the elastic resistance pre-tensioning mechanism includes a bottom supporting base plate that can be fixed to the ground, a longitudinal supporting base is fixedly installed on one side of the upper surface of the bottom supporting base plate, a shaft mounting hole is provided in the top area of ​​the longitudinal supporting base, a rotatable shaft is installed in the interior of the shaft mounting hole through a bearing, a limiting roller is fixedly installed on one end of the rotating shaft, two symmetrical and compressed coil springs are fixedly installed on the upper surface of the bottom supporting base plate, a rectangular resistance plate located directly below the limiting roller is fixedly installed on the top end of the coil spring, and a sponge wiping body that can resist the outer surface of the flexible grinding belt is embedded in the upper surface of the rectangular resistance plate.

[0011] Preferably, the limiting roller is located at the center of the inner area of ​​the flexible grinding belt, and the bottom area of ​​the limiting roller is in contact with the inner surface of the flexible grinding belt.

[0012] Preferably, it also includes a longitudinal height adjustment mechanism, which is internally provided with a No. 1 externally threaded rod and a No. 2 externally threaded rod connected to the top end of a bottom fixing plate and the bottom end of a No. 1 connecting plate, a longitudinal threaded sleeve threadedly connected to the No. 1 externally threaded rod and the No. 2 externally threaded rod and capable of changing the distance between the No. 1 externally threaded rod and the No. 2 externally threaded rod when rotating, and a polygonal limiting rod inserted into the axis of the No. 1 externally threaded rod and the No. 2 externally threaded rod and capable of preventing the No. 1 externally threaded rod and the No. 2 externally threaded rod from rotating relative to each other.

[0013] Preferably, the longitudinal height adjustment mechanism includes a longitudinal threaded sleeve, a No. 1 externally threaded rod and a No. 2 externally threaded rod, one end of the longitudinal threaded sleeve is provided with a No. 1 internally threaded cavity with an inner concave structure, the other end of the longitudinal threaded sleeve is provided with a No. 2 internally threaded cavity with an inner concave structure, the rod body of the No. 1 externally threaded rod is installed in the interior of the No. 1 internally threaded cavity through the No. 1 threaded structure, and the rod body of the No. 2 externally threaded rod is installed in the interior of the No. 2 internally threaded cavity through the No. 2 threaded structure, the No. 1 externally threaded rod and the No. 2 externally threaded rod are provided with polygonal limiting cavities with inner concave structures at opposite ends, a polygonal limiting rod inserted into the polygonal limiting cavity is fixedly installed in the center of the longitudinal threaded sleeve, one end of the No. 1 externally threaded rod is provided with a No. 2 connecting plate which is integrally connected with it and fixedly connected to the top of the bottom fixing plate, and one end of the No. 2 externally threaded rod is provided with a No. 3 connecting plate which is integrally connected with it and fixedly connected to the bottom end of the No. 1 connecting plate.

[0014] Preferably, the structural shape of the polygonal limit cavity cross section is consistent with the structural shape of the polygonal limit rod cross section, both are polygonal structures, and the structural dimensions of the polygonal limit cavity cross section match the structural dimensions of the polygonal limit rod cross section.

[0015] Preferably, the No. 1 thread structure includes an internal thread structure arranged inside the No. 1 internal thread cavity and an external thread structure arranged on the No. 1 external thread rod body, and the No. 2 thread structure includes an internal thread structure arranged inside the No. 2 internal thread cavity and an external thread structure arranged on the No. 2 external thread rod body, and the spiral direction of the No. 1 thread structure is opposite to the spiral direction of the No. 2 thread structure.

[0016] Compared with the prior art, the present invention provides a surface grinding device for aluminum cylinder production with a cleaning function, which has the following beneficial effects: The outer circumferential surface of the aluminum cylinder is polished using a flexible polishing belt, and the flexible polishing belt in a partial area can be wrapped and attached to the outside of the aluminum cylinder, thereby increasing the polishing area and the curvature of the aluminum cylinder, and the curvature can adaptably change with the contact surfaces of aluminum cylinders of different sizes, thereby taking effective polishing measures for aluminum cylinders of different sizes and improving the polishing adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the present invention; Figure 2 is a three-dimensional cross-sectional view of the present invention; Figure 3 A three-dimensional diagram of the gas expansion type positioning mechanism of the present invention; Figure 4 is a three-dimensional cross-sectional view of the gas expansion type positioning mechanism of the present invention; Figure 5 It is a three-dimensional diagram of the elastic contact type pre-tightening mechanism in the present invention; Figure 6 It is a three-dimensional cross-sectional view of the elastic contact type pre-tightening mechanism in the present invention; Figure 7 is a three-dimensional cross-sectional view of the longitudinal height adjustment mechanism of the present invention; Figure 8 It is a three-dimensional diagram of the polygonal limiting rod in the present invention.

[0018] Among them: 1. driving roller; 2. driven roller; 3. flexible grinding belt; 4. bottom fixing plate; 5. aluminum cylinder; 6. gas expansion type positioning mechanism; 61. fixing ring; 62. No. 1 connecting plate; 63. connecting shaft structure; 64. hollow cylinder; 65. gas storage cavity; 66. No. 1 gas flow channel; 67. gas flow gap; 68. elastic airbag; 69. fixing ring; 7. elastic contact type pre-tightening mechanism; 71. bottom support base plate; 72. longitudinal support base; 73. shaft Body mounting hole; 74, rotating shaft; 75, limiting roller; 76, spiral spring; 77, rectangular resistance plate; 78, sponge wiping body; 8, longitudinal height adjustment mechanism; 81, longitudinal threaded sleeve; 82, No. 1 internal thread cavity; 83, No. 2 internal thread cavity; 84, No. 1 thread structure; 85, No. 2 thread structure; 86, No. 1 external thread rod; 87, No. 2 external thread rod; 88, No. 2 connecting plate; 89, No. 3 connecting plate; 810, polygonal limiting cavity; 811, polygonal limiting rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 2 , a surface grinding device for aluminum tube production with a cleaning function, comprising a driving roller 1 that can rotate with an external motor, a driven roller 2 located on one side of the driving roller 1 and capable of rotating with the driving roller 1, and a flexible grinding belt 3 that can be placed between the driving roller 1 and the driven roller 2 in a circular closed manner, and when the driving roller 1 rotates, a circularly rotating flexible grinding belt 3 can be generated, the aluminum tube 5 is moved to the upper surface of the flexible grinding belt 3, and the bottom area of ​​the aluminum tube 5 generates a downward force on the contact surface of the flexible grinding belt 3, until part of the flexible grinding belt 3 is wrapped around the bottom area of ​​the aluminum tube 5 to form a downwardly concave curved surface, and the curved area is the grinding area, the motor is turned on, the driving roller 1 is rotated, and under the action of friction, the flexible grinding belt 3 will be driven to produce a circular motion effect, and at the same time, the driven roller 2 will be driven, and the moving flexible grinding belt 3 will perform a relative friction grinding effect on the grinding area of ​​the aluminum tube 5.

[0021] In order to realize the positioning and grinding control function of the aluminum cylinder 5, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, it is necessary to set up a gas expansion type positioning mechanism 6, which is provided with a hollow cylinder 64 that can be inserted into the central area of ​​the aluminum cylinder 5 and is hollow inside, an edge-sealed installation on the outer circumferential surface of the hollow cylinder 64 and when subjected to gas pressure, it expands outward and then contacts the elastic airbag 68 at the inner wall of the circumference of the aluminum cylinder 5, and a fixed ring 61 installed on the periphery of one end of the hollow cylinder 64 and capable of supporting the hollow cylinder 64. The aluminum cylinder 5 is placed on the periphery of the elastic airbag 68, and then the gas is filled into the interior of the No. 1 gas flow channel 66 using an inflation device. Under the action of the high-pressure gas, the elastic airbag 68 will expand outward until the inner cavity of the aluminum cylinder 5 is filled, so that the aluminum cylinder 5 is fixed, thereby realizing the positioning of the aluminum cylinder 5. During the grinding process, the aluminum cylinder 5 is manually controlled to control the speed between the rotation of the aluminum cylinder 5 and the rotation of the flexible grinding belt 3, so that there is a speed difference between the two, and a comprehensive grinding effect can be achieved on the outer circumferential surface of the aluminum cylinder 5.

[0022] For the specific structure of the gas expansion type positioning mechanism 6, please refer to Figure 3 and Figure 4 , including a fixed collar 61, the bottom of the fixed collar 61 is provided with a No. 1 connecting plate 62 which is an integral structure with it and extends upward, the annular hole of the fixed collar 61 is provided with a rotatable connecting shaft structure 63 through a bearing, the connecting shaft structure 63 is provided with a hollow cylinder 64 which is an integral structure with it at the end directly above the flexible grinding belt 3, the hollow cylinder 64 is provided with a gas storage cavity 65 inside, the connecting shaft structure 63 is provided with a gas storage cavity 65 at one end which is connected to the external space and the gas storage cavity 65 and is provided with a gas storage cavity 65 at one end The valve has a No. 1 gas flow channel 66, and an elastic airbag 68 is fixedly installed on the outer circumferential surface of the hollow cylinder 64 through a fixing ring 69. A plurality of gas flow notches 67 connecting the inner side of the elastic airbag 68 and the gas storage cavity 65 are arranged at the circumferential wall thickness of the hollow cylinder 64. The length of the hollow cylinder 64 is smaller than the length of the aluminum cylinder 5, and the length of the aluminum cylinder 5 is smaller than the width of the flexible grinding belt 3. The two fixing rings 69 fix the two end areas of the elastic airbag 68 to the outer circumferential surface of the hollow cylinder 64 in a sealing manner.

[0023] In order to realize the pull-down limit of the flexible grinding belt 3 and the grinding surface cleaning function, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6, it is necessary to set up an elastic resistance pre-tightening mechanism 7, which is internally provided with a limiting roller 75 that can limit the inner surface of the flexible grinding belt 3 downward, thereby making the flexible grinding belt 3 in a taut state, a sponge wiping body 78 that resists the bottom surface of the flexible grinding belt 3 and can wipe the residue on the surface of the flexible grinding belt 3, and a spiral spring 76 that provides upward elastic pressure to the sponge wiping body 78. The limiting roller 75 can have a downward limiting effect on the flexible grinding belt 3, so that part of the structure of the flexible grinding belt 3 bulges downward. Under the elastic action of the spiral spring 76, the sponge wiping body 78 will resist the surface of the lowest area of ​​the flexible grinding belt 3 with moving pressure. When the flexible grinding belt 3 is in operation, the sponge wiping body 78 can clean the particles remaining on the surface of the flexible grinding belt 3 in a wiping state, thereby realizing the pull-down limiting and grinding surface cleaning functions of the flexible grinding belt 3.

[0024] For the specific structure of the elastic contact type pre-tightening mechanism 7, please refer to Figure 5 and Figure 6 , including a bottom support base plate 71 that can be fixed to the ground, a longitudinal support base 72 is fixedly installed on one side of the upper surface of the bottom support base plate 71, a shaft mounting hole 73 is provided in the top area of ​​the longitudinal support base 72, a rotatable rotating shaft 74 is installed on the longitudinal support base 72 through a bearing inside the shaft mounting hole 73, a limiting roller 75 is fixedly installed on one end of the rotating shaft 74, two symmetrical and compressed coil springs 76 are fixedly installed on the upper surface of the bottom support base plate 71, a rectangular abutting plate 77 located directly below the limiting roller 75 is fixedly installed on the top end of the coil spring 76, a sponge wiping body 78 that can abut against the outer surface of the flexible grinding belt 3 is embedded on the upper surface of the rectangular abutting plate 77, the limiting roller 75 is located at the central part of the inner area of ​​the flexible grinding belt 3, and the bottom area of ​​the limiting roller 75 abuts against the inner surface of the flexible grinding belt 3.

[0025] In order to adjust the height of the aluminum cylinder 5 and thus adjust the tension of the flexible grinding belt 3, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8, it is necessary to set up a longitudinal height adjustment mechanism 8, which is provided with a No. 1 external thread rod 86 and a No. 2 external thread rod 87 connected to the top of a bottom fixing plate 4 and the bottom of the No. 1 connecting plate 62, a longitudinal threaded sleeve 81 which is threadedly connected to the No. 1 external thread rod 86 and the No. 2 external thread rod 87 and can change the distance between the No. 1 external thread rod 86 and the No. 2 external thread rod 87 when rotating, and a polygonal limiting rod 811 which is inserted into the axis of the No. 1 external thread rod 86 and the No. 2 external thread rod 87 and can prevent the No. 1 external thread rod 86 and the No. 2 external thread rod 87 from rotating relative to each other, and the longitudinal threaded sleeve 81 is threadedly connected to the No. 1 external thread rod 86 and the No. 2 external thread rod 87 and can change the distance between the No. 1 external thread rod 86 and the No. 2 external thread rod 87 when rotating. The threaded sleeve 81, since the spiral direction of the No. 1 threaded structure 84 is opposite to the spiral direction of the No. 2 threaded structure 85, and during the rotation process, the existence of the polygonal limiting rod 811 prevents the No. 1 external threaded rod 86 and the No. 2 external threaded rod 87 from relative rotation. Therefore, the distance between the No. 1 external threaded rod 86 and the No. 2 external threaded rod 87 will change, thereby changing the height of the aluminum cylinder 5, and the height of the aluminum cylinder 5 will directly affect the flexible grinding belt 3, thereby realizing the adjustment of the tension of the flexible grinding belt 3, making the contact between the aluminum cylinder 5 and the flexible grinding belt 3 closer, so as to improve the grinding effect.

[0026] For the specific structure of the longitudinal height adjustment mechanism 8, please refer to Figure 7 and Figure 8, including a longitudinal threaded sleeve 81, a No. 1 external threaded rod 86 and a No. 2 external threaded rod 87, one end of the longitudinal threaded sleeve 81 is provided with a No. 1 internal threaded cavity 82 with an inner concave structure, and the other end of the longitudinal threaded sleeve 81 is provided with a No. 2 internal threaded cavity 83 with an inner concave structure, the rod body of the No. 1 external threaded rod 86 is installed in the interior of the No. 1 internal threaded cavity 82 through the No. 1 threaded structure 84, and the rod body of the No. 2 external threaded rod 87 is installed in the interior of the No. 2 internal threaded cavity 83 through the No. 2 threaded structure 85, the No. 1 external threaded rod 86 and the No. 2 external threaded rod 87 are provided with a polygonal limiting cavity 810 with an inner concave structure at the opposite ends, a polygonal limiting rod 811 inserted into the polygonal limiting cavity 810 is fixedly installed in the center of the longitudinal threaded sleeve 81, and one end of the No. 1 external threaded rod 86 is provided with a structure integral with it and fixedly connected to the top of the bottom fixing plate 4 The second connecting plate 88 is connected to the second external threaded rod 87, and one end of the second external threaded rod 87 is provided with a third connecting plate 89 which is an integral structure therewith and fixedly connected to the bottom end of the first connecting plate 62. The structural shape of the cross section of the polygonal limiting cavity 810 is consistent with the structural shape of the cross section of the polygonal limiting rod 811, both of which are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting cavity 810 match the structural dimensions of the cross section of the polygonal limiting rod 811. The first threaded structure 84 includes an internal threaded structure arranged inside the first internal threaded cavity 82 and an external threaded structure arranged on the rod body of the first external threaded rod 86. The second threaded structure 85 includes an internal threaded structure arranged inside the second internal threaded cavity 83 and an external threaded structure arranged on the rod body of the second external threaded rod 87, and the spiral direction of the first threaded structure 84 is opposite to the spiral direction of the second threaded structure 85.

[0027] When in use, the aluminum tube 5 is placed on the outside of the elastic airbag 68, and then the inflation device is used to fill gas into the interior of the No. 1 gas flow channel 66. Under the action of the high-pressure gas, the elastic airbag 68 will expand outward until the inner cavity of the aluminum tube 5 is filled, so that the aluminum tube 5 is fixed, and the longitudinal threaded sleeve 81 is rotated in a directional manner. The distance between the No. 1 external threaded rod 86 and the No. 2 external threaded rod 87 will change, thereby changing the height of the aluminum tube 5, and the height of the aluminum tube 5 will directly affect the flexible grinding belt 3, thereby adjusting the tension of the flexible grinding belt 3, making the contact between the aluminum tube 5 and the flexible grinding belt 3 closer, and turning on the motor to rotate the driving roller 1. Under the action of force, the flexible grinding belt 3 will be driven to produce a circular motion effect, and at the same time, the driven roller 2 will be driven. The moving flexible grinding belt 3 will perform a relative friction grinding effect on the grinding area of ​​the aluminum cylinder 5. During the grinding process, the aluminum cylinder 5 is manually controlled to control the speed between the rotation of the aluminum cylinder 5 and the rotation of the flexible grinding belt 3, so that there is a speed difference between the two, and a comprehensive grinding effect can be achieved on the outer circumferential surface of the aluminum cylinder 5. When the flexible grinding belt 3 is running, the sponge wiping body 78 can clean the particles remaining on the surface of the flexible grinding belt 3 while wiping, thereby realizing the pull-down limit of the flexible grinding belt 3 and the grinding surface cleaning function.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A surface grinding device for aluminum tube production with a cleaning function, comprising a driving roller (1) capable of rotating with an external motor, a driven roller (2) located on one side of the driving roller (1) and capable of rotating with the driving roller (1), and a flexible grinding belt (3) which can be placed between the driving roller (1) and the driven roller (2) in a closed loop manner and can generate a cyclic rotation when the driving roller (1) rotates, characterized in that: Also includes, The gas expansion type positioning mechanism (6) is provided with a hollow cylinder (64) which can be inserted into the center area of ​​the aluminum cylinder (5) and is in a hollow state inside, an elastic airbag (68) which is installed in a sealed manner on the outer circumferential surface of the hollow cylinder (64) and expands outward when subjected to gas pressure, thereby contacting the circumferential inner wall of the aluminum cylinder (5), and a fixing ring (61) which is installed on the outer periphery of one end of the hollow cylinder (64) and can support the hollow cylinder (64).

2. The surface grinding device for aluminum cylinder production with cleaning function according to claim 1 is characterized in that: The gas expansion type positioning mechanism (6) comprises a fixed collar (61), the bottom of which is provided with a first connecting plate (62) which is integrally formed with the fixed collar (61) and extends upward, a rotatable connecting shaft structure (63) is mounted at the ring hole of the fixed collar (61) via a bearing, the connecting shaft structure (63) is provided with a hollow cylinder (64) which is integrally formed with the fixed collar at the end portion located directly above the flexible grinding belt (3), a gas storage cavity (65) is arranged inside the hollow cylinder (64), a first gas flow channel (66) which is connected to the external space and one end of the gas storage cavity (65) and is provided with a gas valve is arranged inside the connecting shaft structure (63), an elastic air bag (68) is fixedly mounted on the outer circumferential surface of the hollow cylinder (64) via a fixed ring (69), and a plurality of gas flow notches (67) which are connected to the inner side of the elastic air bag (68) and the gas storage cavity (65) are arranged at the circumferential wall thickness of the hollow cylinder (64).

3. The surface grinding device for aluminum cylinder production with cleaning function according to claim 2 is characterized in that: The length of the hollow cylinder (64) is smaller than the length of the aluminum cylinder (5), and the length of the aluminum cylinder (5) is smaller than the width of the flexible grinding belt (3).

4. The surface grinding device for aluminum cylinder production with cleaning function according to claim 3 is characterized in that: The two fixing rings (69) fix the two end regions of the elastic airbag (68) to the outer circumferential surface of the hollow cylinder (64) in a sealing manner.

5. The surface grinding device for aluminum cylinder production with cleaning function according to claim 4 is characterized in that: The flexible grinding belt (3) is provided with a limit roller (75) capable of limiting the inner surface of the flexible grinding belt (3) downward, thereby placing the flexible grinding belt (3) in a taut state, a sponge wiping body (78) that contacts the bottom surface of the flexible grinding belt (3) and can wipe the residue on the surface of the flexible grinding belt (3), and a coil spring (76) that provides an upward elastic pressure to the sponge wiping body (78). The flexible grinding belt (3) is provided with a limit roller (75) that can limit the inner surface of the flexible grinding belt (3) downward, thereby placing the flexible grinding belt (3) in a taut state, ... limit roller (75) in a taut state, and a coil spring (76) that can provide an upward elastic pressure to the sponge wiping body (78). The top area of ​​the (72) is provided with an axle mounting hole (73), and a rotatable rotating shaft (74) is installed in the longitudinal support base (72) through a bearing inside the axle mounting hole (73), and a limiting roller (75) is fixedly installed at one end of the rotating shaft (74). Two symmetrical and compressed coil springs (76) are fixedly installed on the upper surface of the bottom support base (71), and a rectangular contact plate (77) located directly below the limiting roller (75) is fixedly installed on the top of the coil spring (76), and a sponge wiping body (78) capable of contacting the outer surface of the flexible grinding belt (3) is embedded in the upper surface of the rectangular contact plate (77).

6. The surface grinding device for aluminum cylinder production with cleaning function according to claim 5, characterized in that: The limiting roller (75) is located at the center of the inner area of ​​the flexible grinding belt (3), and the bottom area of ​​the limiting roller (75) is in contact with the inner surface of the flexible grinding belt (3).

7. The surface grinding device for aluminum cylinder production with cleaning function according to claim 6, characterized in that: The invention also comprises a longitudinal height adjustment mechanism (8), the interior of which is provided with a No. 1 externally threaded rod (86) and a No. 2 externally threaded rod (87) connected to the top end of a bottom fixing plate (4) and the bottom end of a No. 1 connecting plate (62), a longitudinal threaded sleeve (81) threadedly connected to the No. 1 externally threaded rod (86) and the No. 2 externally threaded rod (87) and capable of changing the distance between the No. 1 externally threaded rod (86) and the No. 2 externally threaded rod (87) when rotating, and a polygonal limiting rod (811) inserted into the axis of the No. 1 externally threaded rod (86) and the No. 2 externally threaded rod (87) and capable of preventing the No. 1 externally threaded rod (86) and the No. 2 externally threaded rod (87) from rotating relative to each other.

8. The surface grinding device for aluminum cylinder production with cleaning function according to claim 7, characterized in that: The longitudinal height adjustment mechanism (8) comprises a longitudinal threaded sleeve (81), a No. 1 external threaded rod (86) and a No. 2 external threaded rod (87); one end of the longitudinal threaded sleeve (81) is provided with a No. 1 internal threaded cavity (82) with an inner concave structure; the other end of the longitudinal threaded sleeve (81) is provided with a No. 2 internal threaded cavity (83) with an inner concave structure; the rod body of the No. 1 external threaded rod (86) is installed inside the No. 1 internal threaded cavity (82) via the No. 1 threaded structure (84); the rod body of the No. 2 external threaded rod (87) is installed inside the No. 2 internal threaded cavity (83) via the No. 2 threaded structure (85). Internally, the No. 1 externally threaded rod (86) and the No. 2 externally threaded rod (87) are provided with a polygonal limiting cavity (810) with an inwardly concave structure at the opposite ends, and a polygonal limiting rod (811) inserted into the polygonal limiting cavity (810) is fixedly installed at the center of the longitudinal threaded sleeve (81), and one end of the No. 1 externally threaded rod (86) is provided with a No. 2 connecting plate (88) which is an integral structure with it and fixedly connected to the top of the bottom fixing plate (4), and one end of the No. 2 externally threaded rod (87) is provided with a No. 3 connecting plate (89) which is an integral structure with it and fixedly connected to the bottom end of the No. 1 connecting plate (62).

9. The surface grinding device for aluminum cylinder production with cleaning function according to claim 8, characterized in that: The structural shape of the cross section of the polygonal limiting cavity (810) is consistent with the structural shape of the cross section of the polygonal limiting rod (811), both of which are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting cavity (810) match the structural dimensions of the cross section of the polygonal limiting rod (811).

10. The surface grinding device for aluminum cylinder production with cleaning function according to claim 9, characterized in that: The No. 1 thread structure (84) comprises an internal thread structure arranged inside the No. 1 internal thread cavity (82) and an external thread structure arranged on the rod body of the No. 1 external thread rod (86); the No. 2 thread structure (85) comprises an internal thread structure arranged inside the No. 2 internal thread cavity (83) and an external thread structure arranged on the rod body of the No. 2 external thread rod (87); and the spiral direction of the No. 1 thread structure (84) is opposite to the spiral direction of the No. 2 thread structure (85).

Images