A synchronous polishing device for inner and outer walls of hardware accessories processing

Abstract

The present invention discloses a synchronous polishing device for the inner and outer walls of hardware accessories processing, comprising a base plate and a gantry, wherein the gantry is fixed to the upper end surface of the base plate, a positioning mechanism is also fixed to the base plate, a cylinder is fixed to the gantry, a fixed plate is fixed to the output end of the cylinder, a movable plate is provided below the fixed plate, and a vertical rod is vertically fixed to the movable plate. The synchronous polishing device for the inner and outer walls of hardware accessories processing adopts a downward pressure positioning mechanism to achieve the fixation of the holder and the workpiece, and cooperates with the linkage adjustment mechanism to achieve the position adjustment of the outer grinding roller to adapt to the outer wall polishing of workpieces with different diameters, and cooperates with the rotation centrifugal effect to achieve the position adjustment of the grinding pad to adapt to the inner wall polishing of workpieces with different diameters, thereby greatly improving the adaptability of the device, and the inner and outer grinding mechanisms are driven by the same motor, thereby effectively reducing the production cost of the device.

Description

Technical Field

[0001] The invention relates to the technical field of polishing devices, in particular to a synchronous polishing device for inner and outer walls of hardware accessories processing. Background Art

[0002] Metal outer bottles are commonly used hardware accessories in the cosmetics production process. They have the advantages of high strength and good rigidity, which can effectively avoid damage due to collision during storage and transportation.

[0003] After the production of existing metal outer bottles for cosmetics is completed, in order to ensure their surface smoothness, the workpiece needs to be polished by a polishing device. For example, an automatic polishing device for the inner and outer walls of a can body with announcement number CN107639523B can polish the inner and outer walls of the can body at the same time. However, the above-mentioned existing polishing device cannot adapt to the polishing of workpieces with different diameters during actual use. Therefore, in response to the above problem, a synchronous polishing device for the inner and outer walls of hardware accessories processing is designed to better meet actual use needs. Summary of the Invention

[0004] The purpose of the present invention is to provide a synchronous polishing device for inner and outer walls of hardware accessories processing to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a synchronous polishing device for inner and outer walls of hardware accessories processing, comprising a base plate and a gantry, the upper end surface of the base plate is fixed with the gantry, the base plate is also fixed with a positioning mechanism, a cylinder is fixed on the gantry, the output end of the cylinder is fixed with a fixed plate, a movable plate is provided below the fixed plate, a vertical rod is vertically fixed on the movable plate, and the vertical rod and the fixed plate are slidably connected, a first spring is also fixed between the movable plate and the fixed plate, an inner grinding mechanism and an outer grinding mechanism are also installed on the movable plate, an adjustment mechanism is also installed on the movable plate, and the adjustment mechanism The mechanism includes a movable block, a fixed rod, a transmission wheel, a first rotating rod and a second rotating rod, the movable block is slidably connected to the fixed rod, the fixed rod is fixed to the upper end surface of the movable plate, the movable block is also connected to the transmission wheel with a bearing, the movable block is also rotatably connected to one end of the first rotating rod, and the other end of the first rotating rod is rotatably connected to the fixed plate, and the movable block is also rotatably connected to the second rotating rod. When the fixed plate moves relative to the movable plate, the movable block slides through the transmission action of the first rotating rod, and then cooperates with the transmission action of the second rotating rod to move the outer grinding mechanism to adjust the distance between the outer grinding mechanism and the inner grinding mechanism.

[0006] Preferably, the positioning mechanism includes a first motor, a base, a tray, a positioning shaft and a clamping block. The first motor is fixed on the base plate, and the output end of the first motor is fixed with a base, and a tray is arranged above the base, and a workpiece is nested and installed on the tray. Through the above structure, the tray and the base can be disassembled and assembled, so that a suitable tray can be selected for installation according to the size of the workpiece, thereby improving the adaptability of the device.

[0007] Preferably, a positioning shaft is fixed on the lower end surface of the tray, and the positioning shaft and the card seat are nested and connected, and a clamping block is also fixed on the positioning shaft, and the clamping block and the card seat are snap-fitted. Through the snap-fit action between the clamping block and the card seat, when the first motor drives the card seat to rotate, the tray and the workpiece can be ensured to rotate synchronously, thereby providing basic guarantee for the normal operation of the device.

[0008] Preferably, the internal grinding mechanism includes a second motor, a mounting shaft, a driving wheel, an anti-slip pad, a mounting plate, a grinding pad, a sliding rod, a connecting rod, a slider, a guide rod and a second spring. The second motor is fixed on the movable plate, and the output end of the second motor is fixed with a mounting shaft, and the driving wheel is fixed on the mounting shaft. At the same time, the bearing at the lower end of the mounting shaft is connected to the anti-slip pad. The contact between the anti-slip pad and the workpiece can realize a limiting effect. The pressure generated by the contact between the anti-slip pad and the workpiece can not only ensure the stability of the workpiece installation, but also limit the pallet to ensure the stability of the pallet installation.

[0009] Preferably, a mounting plate is installed at an equal angle on the mounting shaft, and a grinding pad is fixed on the mounting plate, and the grinding pad is elastic. At the same time, a sliding rod is fixed on the grinding pad, and the sliding rod and the mounting shaft are slidably connected. Through the action of the grinding pad, a basic guarantee can be provided for grinding the inner wall of the workpiece. Combined with the sliding action between the sliding rod and the mounting shaft, a basic guarantee can be provided for adjusting the position of the grinding pad.

[0010] Preferably, the grinding pad is also rotatably connected to one end of a connecting rod, and the other end of the connecting rod is rotatably connected to the slider, and the slider and the guide rod are slidably connected, and the guide rod is fixed in the mounting shaft. When the mounting shaft rotates, the position of the grinding pad can be adjusted through the action of centrifugal force, combined with the transmission of the connecting rod and the sliding action of the slider, so as to adapt to the processing of workpieces of different diameters.

[0011] Preferably, one end of a second spring is fixed on the slider, and the other end of the second spring is fixed in the mounting shaft. The elastic action of the second spring can provide a basic force for the automatic reset of the grinding pad, thereby ensuring the normal operation of the device.

[0012] Preferably, the external grinding mechanism includes a mounting block, an external grinding roller, a driven wheel and a cross bar. The mounting block and the second rotating rod are rotatably connected, and the outer grinding roller is connected to the bearing at the lower end of the mounting block, and the outer grinding roller and the movable plate are slidably connected. At the same time, the lower end surface of the outer grinding roller is flush with the lower end surface of the mounting shaft. The outer wall of the workpiece can be polished by the action of the external grinding roller, and the mounting block can be forced to move by the transmission action of the second rotating rod, thereby realizing the position adjustment of the outer grinding roller to meet the processing needs of workpieces with different diameters.

[0013] Preferably, a driven wheel is fixed on the outer grinding roller, and the driven wheel is connected to the driving wheel and the transmission wheel through a belt. Through the transmission action between the driven wheel, the driving wheel and the transmission wheel, the outer grinding roller can be ensured to rotate synchronously with the grinding pad, thereby providing basic guarantee for the grinding and polishing of the workpiece.

[0014] Preferably, a cross bar is fixed to the mounting block, and the cross bar is slidably connected to the movable plate. When the mounting block is moved under force, the sliding guide effect between the cross bar and the movable plate can ensure the stability of the movement of the mounting block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the synchronous polishing device for inner and outer walls of hardware accessories processing adopts a downward pressure positioning mechanism to achieve the fixation of the holder and the workpiece, and cooperates with the linkage adjustment mechanism to achieve the position adjustment of the outer grinding roller to adapt to the outer wall polishing of workpieces with different diameters, and cooperates with the rotation centrifugal effect to achieve the position adjustment of the grinding pad to adapt to the inner wall polishing of workpieces with different diameters, thereby greatly improving the adaptability of the device, and the inner and outer grinding mechanisms are driven by the same motor, thereby effectively reducing the production cost of the device. The specific contents are as follows:

[0016] 1. This synchronous polishing device for the inner and outer walls of hardware accessories can be used to install pallets of different diameters through the functions of the clamping seat, positioning shaft and clamping block, so as to adapt to the polishing of different workpieces. In conjunction with the functions of the cylinder and anti-slip pad, the workpiece and pallet can be pressed and limited to ensure the normal operation of the device.

[0017] 2. The synchronous polishing device for inner and outer walls of hardware accessories processing, during the processing process, can adjust the distance between the fixed plate and the movable plate through the action of the cylinder, the vertical rod and the first spring, and cooperate with the transmission action of the first rotating rod and the second rotating rod to adjust the position of the outer grinding roller to adapt to the outer wall polishing of workpieces with different diameters, and during the adjustment process, the position of the driven wheel and the transmission wheel can be adjusted synchronously to ensure that the belt between the transmission wheel, the transmission wheel and the driving wheel is always kept in a tensioned state, thereby ensuring the normal transmission action between the transmission wheel, the transmission wheel and the driving wheel.

[0018] 3. The synchronous polishing device for inner and outer walls of hardware accessories processing, during the processing, the second motor drives the installation shaft to rotate at high speed. Under the action of centrifugal force, in conjunction with the action of the slide rod, connecting rod, slider, guide rod and second spring, the rotation diameter of the polishing pad can be adjusted to adapt to the inner wall polishing of workpieces with different diameters, thereby improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall isometric structure of the device of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the device of the present invention when viewed from above;

[0021] Figure 3 This is a schematic diagram of the exploded cross-section of the positioning mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the inner grinding mechanism and the outer grinding mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the outer grinding mechanism and the adjustment mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the installation axis section of the present invention;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the grinding pad and the guide rod of the present invention.

[0026] Figure: 1, bottom plate; 2, gantry; 3, positioning mechanism; 301, first motor; 302, holder; 303, tray; 304, positioning shaft; 305, clamping block; 4, workpiece; 5, cylinder; 6, fixed plate; 7, movable plate; 701, vertical rod; 702, first spring; 8, inner grinding mechanism; 801, second motor; 802, mounting shaft; 803, driving wheel; 804, anti-slip pad; 805, mounting Plate; 806, grinding pad; 807, sliding rod; 808, connecting rod; 809, slider; 810, guide rod; 811, second spring; 9, external grinding mechanism; 901, mounting block; 902, external grinding roller; 903, driven wheel; 904, cross bar; 10, adjusting mechanism; 1001, movable block; 1002, fixed rod; 1003, transmission wheel; 1004, first rotating rod; 1005, second rotating rod. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7 The present invention provides a technical solution: a synchronous polishing device for inner and outer walls of hardware accessories processing, comprising a base plate 1 and a gantry 2, the gantry 2 being fixed to the upper end surface of the base plate 1, a positioning mechanism 3 being fixed to the base plate 1, a cylinder 5 being fixed to the gantry 2, a fixed plate 6 being fixed to the output end of the cylinder 5, a movable plate 7 being provided below the fixed plate 6, a vertical rod 701 being vertically fixed to the movable plate 7, and a sliding connection being formed between the vertical rod 701 and the fixed plate 6, a first spring 702 being fixed between the movable plate 7 and the fixed plate 6, an inner grinding mechanism 8 and an outer grinding mechanism 9 being installed on the movable plate 7, an adjusting mechanism 10 being installed on the movable plate 7, and the adjusting mechanism 10 comprising a movable block 1001, a fixed rod 1002, a transmission wheel 1003, a first rotating wheel 1004, a rotating wheel 1005, a first rotating wheel 1006, a first rotating wheel 1007, a first rotating wheel 1008, a first rotating wheel 1009, a first rotating wheel 1010, a first rotating wheel 1011, a first rotating wheel 1012, a first rotating wheel 1013, a first rotating wheel 1014, a first rotating wheel 1015, a first rotating wheel 1016, a first rotating wheel 1017, a first rotating wheel 1018, a first rotating wheel 1019, a first rotating wheel 1020, a first rotating wheel 1021, a first rotating wheel 1022, a first rotating wheel 1023, a first rotating wheel 1024, a first rotating wheel 1025, a first rotating wheel 1026, a first rotating wheel 1027, a first rotating wheel 1028, a first rotating wheel 1029, a first rotating Rod 1004 and the second rotating rod 1005, the movable block 1001 is slidingly connected to the fixed rod 1002, the fixed rod 1002 is fixed to the upper end surface of the movable plate 7, and the movable block 1001 is also connected to a transmission wheel 1003 with a bearing, and the movable block 1001 is also rotatably connected to one end of the first rotating rod 1004, and the other end of the first rotating rod 1004 is rotatably connected to the fixed plate 6, and the movable block 1001 is also rotatably connected to the second rotating rod 1005. When the fixed plate 6 moves relative to the movable plate 7, the movable block 1001 slides through the transmission action of the first rotating rod 1004, and then cooperates with the transmission action of the second rotating rod 1005 to move the outer grinding mechanism 9 to adjust the distance between the outer grinding mechanism 9 and the inner grinding mechanism 8.

[0029] The positioning mechanism 3 includes a first motor 301, a base 302, a tray 303, a positioning shaft 304, and a clamping block 305. The first motor 301 is fixed to the base plate 1, and the base 302 is fixed to the output end of the first motor 301. The tray 303 is provided above the base 302, and the workpiece 4 is nested and mounted on the tray 303. The positioning shaft 304 is fixed to the lower end surface of the tray 303, and the positioning shaft 304 and the base 302 are nested. The clamping block 305 is also fixed to the positioning shaft 304, and the clamping block 305 and the base 302 are engaged.

[0030] When using the synchronous polishing device for the inner and outer walls of the hardware accessories, Figure 1-Figure 3As shown, first, a suitable tray 303 is selected for installation according to the size of the workpiece 4. When the tray 303 is installed, the positioning function can be achieved by nesting the positioning shaft 304 with the clamping seat 302. The engagement between the clamping block 305 and the clamping seat 302 can ensure that the tray 303 can rotate synchronously with the clamping seat 302 in the later stage. After the installation is completed, the workpiece 4 can be positioned and installed by nesting the workpiece 4 and the tray 303.

[0031] The external grinding mechanism 9 includes a mounting block 901, an external grinding roller 902, a driven wheel 903 and a cross bar 904. The mounting block 901 is rotatably connected to the second rotating rod 1005, and the outer grinding roller 902 is connected to the bearing at the lower end of the mounting block 901. The outer grinding roller 902 is slidably connected to the movable plate 7, and the lower end surface of the outer grinding roller 902 is flush with the lower end surface of the mounting shaft 802. A driven wheel 903 is fixed to the external grinding roller 902, and the driven wheel 903 is connected to the driving wheel 803 and the transmission wheel 1003 through a belt. A cross bar 904 is also fixed to the mounting block 901, and the cross bar 904 is slidably connected to the movable plate 7.

[0032] When processing the workpiece 4, Figure 1-Figure 7 As shown, by controlling the cylinder 5 to start, the fixed plate 6, the movable plate 7, the inner grinding mechanism 8 and the outer grinding mechanism 9 can be driven to move downward. When the anti-skid pad 804 contacts the workpiece 4 and generates pressure, the workpiece 4 and the tray 303 can be limited. At this time, the cylinder 5 continues to extend to drive the fixed plate 6 to move downward. Since the anti-skid pad 804 contacts the workpiece 4 to achieve positioning, the movable plate 7, the inner grinding mechanism 8 and the outer grinding mechanism 9 are in a fixed state relative to the fixed plate 6, and the fixed plate 6 moves relative to the movable plate 7. The sliding guide effect between the fixed plate 6 and the vertical rod 701 can ensure the stability of the movement of the fixed plate 6, and the first spring 702 is forced to shrink. When the fixed plate 6 moves relative to the movable plate 7, the first rotating rod 1004 is forced to rotate, so that the movable block 100 1 slides on the fixed rod 1002. When the fixed rod 1002 moves, the second rotating rod 1005 drives the mounting block 901 to move toward the inner grinding mechanism 8 under force. The sliding guide between the cross bar 904 and the movable plate 7 ensures the stability of the movement of the mounting block 901, thereby realizing the position adjustment of the outer grinding roller 902 until the outer grinding roller 902 contacts the outer wall of the workpiece 4. In addition, during the adjustment process, the transmission wheel 1003 moves synchronously with the movable block 1001, and the driven wheel 903 moves with the mounting block 901, thereby ensuring that the belts between the transmission wheel 1003, the driven wheel 903 and the driving wheel 803 are always kept in a tensioned state, providing a basic guarantee for the subsequent rotation of the outer grinding roller 902.

[0033] The inner grinding mechanism 8 includes a second motor 801, a mounting shaft 802, a driving wheel 803, an anti-skid pad 804, a mounting plate 805, a grinding pad 806, a slide bar 807, a connecting rod 808, a slider 809, a guide rod 810 and a second spring 811. The second motor 801 is fixed on the movable plate 7, and the output end of the second motor 801 is fixed with a mounting shaft 802, and the driving wheel 803 is fixed on the mounting shaft 802. At the same time, the lower end bearing of the mounting shaft 802 is connected to the anti-skid pad 804, and the anti-skid pad 804 contacts the workpiece 4 to achieve a limiting effect; the mounting plate 806 is installed at an equal angle on the mounting shaft 802. 05, and a grinding pad 806 is fixed on the mounting plate 805, and the grinding pad 806 has elasticity, and a sliding rod 807 is fixed on the grinding pad 806, and the sliding rod 807 is slidably connected to the mounting shaft 802; one end of a connecting rod 808 is rotatably connected to the grinding pad 806, and the other end of the connecting rod 808 is rotatably connected to the slider 809, and the slider 809 is slidably connected to the guide rod 810, and the guide rod 810 is fixed in the mounting shaft 802; one end of a second spring 811 is fixed on the slider 809, and the other end of the second spring 811 is fixed in the mounting shaft 802;

[0034] After the outer grinding roller 902 contacts the outer wall of the workpiece 4, Figure 1-Figure 7 As shown, by starting the first motor 301 and the second motor 801, the first motor 301 can drive the tray 303 and the workpiece 4 to rotate, and since the grinding pad 806 and the mounting shaft 802 are connected by a bearing, the normal rotation of the tray 303 and the workpiece 4 can be guaranteed. The second motor 801 can drive the mounting shaft 802 and the driving wheel 803 to rotate, and the transmission effect between the driving wheel 803, the transmission wheel 1003 and the driven wheel 903 can make the outer grinding roller 902 rotate under force, and the outer wall of the workpiece 4 can be polished by the rotation of the outer grinding roller 902. , and through the rotation of the workpiece 4, the outer wall of the workpiece 4 can be fully polished. When the mounting shaft 802 rotates, the mounting plate 805 and the polishing pad 806 move under the action of centrifugal force, so that the rotation diameter of the polishing pad 806 can be adjusted. When the polishing pad 806 moves, the transmission action of the connecting rod 808, the sliding action between the slider 809 and the guide rod 810, and the sliding action between the slide bar 807 and the mounting shaft 802 can ensure the stability of the movement of the polishing pad 806 until the polishing pad 806 contacts the inner wall of the workpiece 4, thereby achieving the polishing effect on the inner wall of the workpiece 4;

[0035] In summary, the synchronous polishing device for inner and outer walls of hardware accessories processing can adapt to polishing workpieces 4 of different sizes, greatly improving the adaptability of the device. This is the working principle of the synchronous polishing device for inner and outer walls of hardware accessories processing.

[0036] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous polishing device for inner and outer walls of hardware accessories, comprising a base plate (1) and a gantry (2), wherein the gantry (2) is fixed to the upper end surface of the base plate (1), characterized in that: A positioning mechanism (3) is also fixed on the bottom plate (1), a cylinder (5) is fixed on the gantry (2), a fixed plate (6) is fixed to the output end of the cylinder (5), a movable plate (7) is provided below the fixed plate (6), a vertical rod (701) is vertically fixed on the movable plate (7), and a sliding connection is formed between the vertical rod (701) and the fixed plate (6), a first spring (702) is also fixed between the movable plate (7) and the fixed plate (6), an inner grinding mechanism (8) and an outer grinding mechanism (9) are also installed on the movable plate (7), and an adjusting mechanism (10) is also installed on the movable plate (7). The adjusting mechanism (10) comprises a movable block (1001), a fixed rod (1002), a transmission wheel (1003), a first rotating rod (1004) and a second rotating rod (1005), wherein the movable block (1001) is slidably connected to the fixed rod (1002), the fixed rod (1002) is fixed to the upper end surface of the movable plate (7), the movable block (1001) is also connected to the transmission wheel (1003) by a bearing, the movable block (1001) is also rotatably connected to one end of the first rotating rod (1004), and the other end of the first rotating rod (1004) is rotatably connected to the fixed plate (6), the movable block (100 1) is also rotatably connected to a second rotating rod (1005). When the fixed plate (6) moves relative to the movable plate (7), the first rotating rod (1004) is used to transmit the movement of the movable block (1001), and the second rotating rod (1005) is used to transmit the movement of the outer grinding mechanism (9) to adjust the distance between the outer grinding mechanism (9) and the inner grinding mechanism (8). The positioning mechanism (3) includes a first motor (301), a card seat (302), a tray (303), a positioning shaft (304) and a card block (305). The first motor (301) is fixed to the bottom plate (1), and the first A card seat (302) is fixed to the output end of the motor (301), and a tray (303) is provided above the card seat (302), and a workpiece (4) is nested and installed on the tray (303). The internal grinding mechanism (8) includes a second motor (801), the second motor (801) is fixed on the movable plate (7), and a mounting shaft (802) is fixed to the output end of the second motor (801), and a driving wheel (803) is fixed on the mounting shaft (802). At the same time, an anti-slip pad (804) is connected to the bearing at the lower end of the mounting shaft (802), and the anti-slip pad (804) contacts the workpiece (4) to achieve a limiting effect.

2. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 1, characterized in that: The positioning mechanism (3) comprises a first motor (301), a clamping seat (302), a tray (303), a positioning shaft (304) and a clamping block (305); the first motor (301) is fixed on the base plate (1); the clamping seat (302) is fixed to the output end of the first motor (301); a tray (303) is provided above the clamping seat (302); and a workpiece (4) is nested and mounted on the tray (303).

3. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 2, characterized in that: A positioning shaft (304) is fixed on the lower end surface of the tray (303), and the positioning shaft (304) and the card seat (302) are nested and connected. A clamping block (305) is also fixed on the positioning shaft (304), and the clamping block (305) and the card seat (302) are engaged.

4. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 1, characterized in that: A mounting plate (805) is mounted on the mounting shaft (802) at an equal angle, and a polishing pad (806) is fixed on the mounting plate (805), and the polishing pad (806) is elastic. A sliding rod (807) is fixed on the polishing pad (806), and the sliding rod (807) is in sliding connection with the mounting shaft (802).

5. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 4, characterized in that: The polishing pad (806) is also rotatably connected to one end of a connecting rod (808), and the other end of the connecting rod (808) is rotatably connected to a slider (809), and the slider (809) is slidably connected to a guide rod (810), while the guide rod (810) is fixed in the mounting shaft (802).

6. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 5, characterized in that: One end of a second spring (811) is fixed on the slider (809), and the other end of the second spring (811) is fixed in the mounting shaft (802).

7. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 1, characterized in that: The external grinding mechanism (9) comprises a mounting block (901), an external grinding roller (902), a driven wheel (903) and a cross bar (904); the mounting block (901) is rotatably connected to the second rotating rod (1005); the lower end bearing of the mounting block (901) is connected to the external grinding roller (902); the external grinding roller (902) is slidably connected to the movable plate (7); and the lower end surface of the external grinding roller (902) is flush with the lower end surface of the mounting shaft (802).

8. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 7, characterized in that: A driven wheel (903) is fixed on the outer grinding roller (902), and the driven wheel (903) is connected to the driving wheel (803) and the transmission wheel (1003) through a belt.

9. The synchronous polishing device for inner and outer walls of hardware accessories according to claim 7, characterized in that: A cross bar (904) is also fixed on the mounting block (901), and the cross bar (904) is in sliding connection with the movable plate (7).

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