Dust-free metal grinding device and grinding method thereof

Abstract

The invention discloses a dust-free metal grinding device and a grinding method thereof. The dust-free metal grinding device comprises a motor assembly, a closed dust collecting assembly and an intelligent control assembly. The motor assembly comprises a motor, a motor output shaft, a motor driving shaft, a polishing and grinding wheel, a transmission belt, a rotating main shaft and a motor driving wheel, the motor is connected with one end of the transmission belt through the motor output shaft, the other end of the transmission belt is connected with the motor driving shaft, and the motor driving wheel is connected with the motor driving shaft; the motor driving shaft drives the rotating main shaft through the motor driving wheel and the transmission belt, a motor bearing seat and a polishing bearing seat are arranged at the two ends of the rotating main shaft respectively, and the polishing grinding wheel is fixed to the front end of the rotating main shaft. The closed dust collecting assembly comprises a polishing cover, a dust collecting box and a reverse blowing air cylinder. The intelligent control assembly is arranged, and the intelligent control assembly adjusts control logic, so that the energy consumption is reduced, and meanwhile, the grinding uniformity is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metal surface treatment, and particularly relates to a metal dust-free polishing device and a polishing method thereof. BACKGROUND

[0002] A metal polishing device is a tool used in metal processing, which plays an important role in metal surface treatment. The device mainly works through the principle of mechanical polishing, that is, relying on the motor to drive the polishing wheel or sandpaper to rotate at high speed, and contacting the metal surface to generate friction force to remove defects such as burrs, oxide layers, scratches, etc. on the surface. In the field of metal processing, the metal polishing and polishing machine is a key equipment to improve the quality of metal products, and is widely used in many industries such as mechanical manufacturing, hardware processing, automobile parts manufacturing, etc. In addition, the metal polishing device also includes a device for polishing the surface of a metal plate, such as a polishing table, a polishing mechanism, a suction cup, a lifting mechanism, and a dust collection mechanism, etc., which can effectively prevent the debris and sparks generated during polishing from flying outward and injuring the surrounding workers.

[0003] The prior art has the following defects: 1. Dust leakage problem: there is a gap between the dust collection cover of the traditional polishing equipment (such as an angle grinder) and the workpiece, more than 30% of micron-sized dust escapes, which is harmful to the health of the operator. 2. Low filtration efficiency: the dust collection box uses a single layer of filter screen, and metal dust can easily block the filter holes, so it needs to be stopped for cleaning every 2 hours. 3. Insufficient adaptability: the fixed dust collection structure cannot adapt to curved workpieces, resulting in ineffective dust collection in local areas.

[0004] Chinese invention patent CN116967903B discloses a dust-free polishing device and its use method, relating to the technical field of iron sheet polishing equipment, and proposes the following technical solution: including an operation table and a mounting shell mounted on the upper end of the operation table, a recess is formed in the upper end of the operation table, a support plate is connected in the recess, a transmission seat is slidingly connected to the upper end of the support plate, a storage plate is rotatably connected to the outer end of the transmission seat, a positioning frame is connected to the upper surface of the storage plate, a positioning assembly is arranged in the positioning frame, and further including a mounting frame arranged in the mounting shell and a convex plate connected to the upper end side of the mounting frame, a rotating shaft one is rotatably connected to the lower end of the mounting frame, a polishing roller is fixedly sleeved on the outer surface of the rotating shaft one, and a dust collection mechanism is arranged on the side of the polishing roller. This scheme lacks dust concentration feedback adjustment, and the motor load fluctuation cannot be optimized in real time.

[0005] Therefore, the present application provides a metal dust-free polishing device and a polishing method thereof to solve the problems raised in the background art. SUMMARY

[0006] In view of the problems in the background art, the present application aims to provide a metal dust-free polishing device and a polishing method thereof, which can reduce energy consumption by adjusting the control logic of an intelligent control component, and can improve polishing uniformity, reduce the amount of escaped dust by setting an elastic sealing edge and a cyclone dust collector, and increase the maintenance cycle by setting a back blowing cylinder and a HEPA filter, so that the polishing wheel and its gaps are not easily deposited with fine dust.

[0007] To achieve the above technical purpose, the technical scheme adopted by the present application is as follows: A metal dust-free polishing device comprises a motor assembly, a closed dust collection assembly and an intelligent control assembly. The motor assembly comprises a motor, a motor output shaft, a motor driven shaft, a polishing wheel, a transmission belt, a rotating main shaft and a motor driven wheel, the motor is connected to one end of the transmission belt through the motor output shaft, the other end of the transmission belt is connected to the motor driven shaft, the motor driven wheel is connected to the motor driven shaft, the motor driven shaft drives the rotating main shaft through the motor driven wheel and the transmission belt, the rotating main shaft is provided with a motor bearing seat and a polishing bearing seat at both ends respectively, and the polishing wheel is fixed to the front end of the rotating main shaft. The closed dust collection assembly comprises a polishing cover, a dust collection box and a back blowing cylinder, the polishing cover is arranged in a semi-annular manner at the bottom of the polishing wheel, the dust collection box is arranged below the polishing cover, and the back blowing cylinder is fixedly connected to the polishing cover. The intelligent control assembly comprises a control component and a dust sensor, the control component is communicatively connected to the dust sensor, the motor and the back blowing cylinder, the dust sensor is embedded in the inner wall of the polishing cover, and the control component dynamically adjusts the rotating speed of the back blowing cylinder according to the data of the dust sensor.

[0008] Further limitation, the polishing cover is in a semi-arc shape, and the polishing cover edge is provided with an elastic sealing edge.

[0009] Further limitation, the elastic sealing edge is composed of a magnetic silica gel material, and the elastic sealing edge can be self-adapted to the surface of the workpiece to form a dynamic sealing chamber.

[0010] Further limitation, the control component executes the following control logic: when the dust concentration is greater than 50mg / m³, the rotating speed of the back blowing cylinder is increased by at least 20%, and when the motor load fluctuation exceeds 15%, the rotating speed of the motor output shaft is reduced by at least 10%.

[0011] Further limitation, it further comprises a bearing mounting bottom plate, the bearing mounting bottom plate is arranged at the bottom of the polishing bearing seat, and the polishing bearing seat is fixedly connected to the bearing mounting bottom plate.

[0012] Further limited, further comprising a main shaft protection plate fixedly arranged outside the motor assembly and the intelligent control assembly, the main shaft protection plate is used for covering the motor assembly and the intelligent control assembly.

[0013] Further limited, the cyclone separator and the HEPA filter cartridge are arranged in two levels in sequence, the cyclone separator is used for adsorbing large particle dust, and the HEPA filter cartridge is used for adsorbing fine dust.

[0014] Further limited, the sidewall of the dust collecting box is provided with a transparent observation window.

[0015] A metal dust-free polishing method comprises the following steps: S1. The workpiece is placed under the polishing and grinding wheel, and the elastic sealing edge is pressed against the surface of the workpiece to form a closed chamber; S2. Start polishing while starting dust collection, large particle dust is settled by the cyclone separator; S3. Fine dust is captured by the HEPA filter cartridge; S4. The dust sensor feeds back the concentration value in real time, and the rotating speed of the reverse blowing cylinder is dynamically adjusted; Further limited, the workpiece top is provided with a detection sensor connected with the control assembly, and the control assembly controls the reverse rotation of the rotating shaft for 0.5 seconds to remove the dust accumulated in the gap of the polishing and grinding wheel after completing 5cm² polishing area.

[0016] The beneficial effects of the present application are: Dust control, the present application reduces the amount of escaped dust to <2mg / m³ by setting the elastic sealing edge and the cyclone dust collector, which meets the standard.

[0017] Continuous operation, the present application is suitable for long-time continuous operation by setting the reverse blowing cylinder and the HEPA filter cartridge, so that the polishing and grinding wheel and its gap are not easy to deposit fine dust, and the maintenance period is greatly increased.

[0018] Energy saving and high efficiency, the present application adjusts the control logic through the intelligent control assembly, thereby reducing energy consumption, which is also beneficial to improve the polishing uniformity, and the device can also be suitable for processing complex working conditions such as flat surface, curved surface and narrow space. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application can be further illustrated by the non-limiting embodiments shown in the accompanying drawings; Figure 1 It is a whole structure schematic view of the metal dust-free polishing device and the polishing method embodiment of the present application; Figure 2It is a partial structure schematic view of the embodiment of the metal dustless polishing device and the polishing method.

[0020] The main element symbols are explained as follows: motor 1, motor output shaft 2, motor driving shaft 3, polishing grinding wheel 4, transmission belt 5, polishing cover 6, rotating main shaft 7, motor bearing seat 8, polishing bearing seat 9, bearing mounting bottom plate 10, main shaft protection plate 11, dust collecting box 12, control assembly 13, motor driving wheel 14, elastic sealing edge 15, transparent observation window 16, back blowing air cylinder 19. DETAILED DESCRIPTION

[0021] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0022] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

[0024] As shown in the drawings, Figure 1 A metal dustless polishing device of the present application comprises a motor assembly, a closed dust collecting assembly and an intelligent control assembly. The motor assembly includes a motor 1, a motor output shaft 2, a motor drive shaft 3, a polishing wheel 4, a transmission belt 5, a rotating spindle 7, and a motor drive wheel 14. The motor 1 is connected to one end of the transmission belt 5 via the motor output shaft 2, and the other end of the transmission belt 5 is connected to the motor drive shaft 3. The motor drive wheel 14 is connected to the motor drive shaft 3. The motor drive shaft 3 drives the rotating spindle 7 via the motor drive wheel 14 and the transmission belt 5. The rotating spindle 7 has a motor bearing seat 8 and a polishing bearing seat 9 at both ends, and the polishing wheel 4 is fixed to the front end of the rotating spindle 7. The enclosed dust collection assembly includes a polishing hood 6, a dust collection box 12, and a reverse air blower 19. The polishing hood 6 is semi-circularly arranged around the bottom of the polishing wheel 4, the dust collection box 12 is located below the polishing hood 6, and the reverse air blower 19 is fixedly connected to the polishing hood 6. The intelligent control component includes a control component 13 and a dust sensor. The control component 13 is communicatively connected to the dust sensor, the motor 1, and the back-blowing duct 19. The dust sensor is embedded in the inner wall of the polishing cover 6. The control component 13 dynamically adjusts the rotation speed of the back-blowing duct 19 based on the dust sensor data.

[0025] In the practical application of this embodiment, the polishing cover 6 is semi-arc-shaped, and the edge of the polishing cover 6 is provided with an elastic sealing edge 15.

[0026] In the practical application of this embodiment, the elastic sealing edge 15 is made of magnetic silicone material, and the elastic sealing edge 15 can adaptively conform to the surface of the workpiece to form a dynamic sealing cavity.

[0027] In the practical application of this embodiment, the control component 13 executes the following control logic: when the dust concentration is >50mg / m³, the rotation speed of the back-blowing duct 19 is increased by at least 20%; when the load fluctuation of the motor 1 exceeds 15%, the rotation speed of the motor output shaft 2 is reduced by at least 10%.

[0028] In the practical application of this embodiment, a bearing mounting base plate 10 is also included. The bearing mounting base plate 10 is disposed at the bottom of the polished bearing seat 9, and the polished bearing seat 9 is fixedly connected to the bearing mounting base plate 10.

[0029] In the practical application of this embodiment, a spindle protection plate 11 is also included. The spindle protection plate 11 is fixedly disposed on the outside of the motor assembly and the intelligent control assembly, and the spindle protection plate 11 is used to cover the motor assembly and the intelligent control assembly.

[0030] In the practical application of this embodiment, the dust collection box 12 integrates a cyclone separator and a HEPA filter cartridge. The cyclone separator and the HEPA filter cartridge are arranged in a two-stage manner, with the cyclone separator used to adsorb large dust particles and the HEPA filter cartridge used to adsorb fine dust particles.

[0031] In the practical application of this embodiment, the dust collection box 12 is provided with a transparent observation window 16 on its side wall.

[0032] A method for dust-free polishing of metal, using the apparatus as described in any one of claims 1-7, is characterized by comprising the following steps: S1. Place the workpiece under the polishing wheel 4, and press the elastic sealing edge 15 against the surface of the workpiece to form a closed cavity; S2. Start the grinding process and start the vacuuming simultaneously. Large dust particles settle through the cyclone separator. S3. Fine dust particles are captured by the HEPA filter cartridge; S4. The dust sensor provides real-time feedback of the concentration value and dynamically adjusts the rotation speed of the back-blowing duct 19; In the practical application of this embodiment, a detection sensor is provided on the top of the workpiece. The detection sensor is connected to the control component 13. After the polishing wheel 4 completes the polishing of 5cm² area, the control component 13 controls the rotating spindle 7 to reverse for 0.5 seconds to remove dust accumulated in the wheel gap.

[0033] The working principle of this embodiment is as follows: Power transmission: Start motor 1, motor 1 → motor output shaft 2 → transmission belt 5 → motor drive shaft 3 → rotating spindle 7 → polishing wheel 4; Sealed dust removal, elastic sealing edge 15 fits the workpiece → cyclone separator collects large dust particles > 10μm particles → HEPA filter cartridge filters fine dust. Intelligent control: dust concentration / motor load data → control component 13 → dynamically adjusts the speed of the back-blowing duct 19 and the speed of the rotating spindle 7. In addition, the speed range of the rotating spindle 7 is 500-4000rpm (stepless speed change), and the torque transmission efficiency is ≥92%.

[0034] Example 1: Grinding of Aluminum Alloy Metal Parts The dust characteristics of this metal part are Al2O3 particles. The elastic sealing edge 15 fits the aluminum alloy workpiece with a gap of <0.1mm. The operator adjusts the tilt angle of the polishing cover 6 according to the curvature of the metal part surface. The back-blowing air duct 19 starts once every 30 seconds and can operate continuously for 4 hours without clogging. When the dust concentration exceeds the limit, the speed of the back-blowing air duct 19 is automatically increased. Performance data: Dust escape rate: 1.3 mg / m³ (compliant with ISO 21904 standard), continuous operation time: 4.5 hours (19 cycles of reverse air blowing, 35 seconds / cycle) Example 2: Machining of Precision Instrument Parts With the cyclone separator off, only the HEPA filter cartridge is enabled. The dust sensor is set to a threshold of 30 mg / m³, and the machine will automatically stop when the limit is exceeded. The rotating spindle 7 is set to an intermittent reverse mode of 0.5 seconds.

[0035] Actual results: The capture rate of 0.3μm particulate dust was 99.97%, which is 46% higher than that of traditional devices.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A dust-free metal polishing device, characterized in that: Includes motor components, enclosed dust collection components, and intelligent control components; The motor assembly includes a motor (1), a motor output shaft (2), a motor drive shaft (3), a polishing wheel (4), a transmission belt (5), a rotating spindle (7), and a motor drive wheel (14). The motor (1) is connected to one end of the transmission belt (5) through the motor output shaft (2), and the other end of the transmission belt (5) is connected to the motor drive shaft (3). The motor drive wheel (14) is connected to the motor drive shaft (3). The motor drive shaft (3) drives the rotating spindle (7) through the motor drive wheel (14) and the transmission belt (5). The rotating spindle (7) is provided with a motor bearing seat (8) and a polishing bearing seat (9) at both ends. The polishing wheel (4) is fixed to the front end of the rotating spindle (7). The enclosed dust collection assembly includes a polishing hood (6), a dust collection box (12), and a reverse air blower (19). The polishing hood (6) is semi-circularly arranged around the bottom of the polishing wheel (4). The dust collection box (12) is located below the polishing hood (6). The reverse air blower (19) is fixedly connected to the polishing hood (6). The intelligent control component includes a control component (13) and a dust sensor. The control component (13) is communicatively connected to the dust sensor, the motor (1) and the back-blowing duct (19). The dust sensor is embedded in the inner wall of the polishing cover (6). The control component (13) dynamically adjusts the rotation speed of the back-blowing duct (19) according to the dust sensor data.

2. The metal dust-free polishing device according to claim 1, characterized in that: The polishing cover (6) is semi-circular, and the edge of the polishing cover (6) is provided with an elastic sealing edge (15).

3. The metal dust-free polishing device according to claim 2, characterized in that: The elastic sealing edge (15) is made of magnetic silicone material. The elastic sealing edge (15) can adaptively fit the surface of the workpiece to form a dynamic sealing chamber.

4. The metal dust-free polishing device according to claim 1, characterized in that: The control component (13) executes the following control logic: when the dust concentration is >50mg / m³, the rotation speed of the back-blowing duct (19) is increased by at least 20%; when the load fluctuation of the motor (1) exceeds 15%, the rotation speed of the motor output shaft (2) is reduced by at least 10%.

5. The metal dust-free polishing device according to claim 1, characterized in that: It also includes a bearing mounting base plate (10), which is located at the bottom of the polished bearing seat (9), and the polished bearing seat (9) is fixedly connected to the bearing mounting base plate (10).

6. The metal dust-free polishing device and polishing method according to claim 1, characterized in that: It also includes a spindle protection plate (11), which is fixedly disposed on the outside of the motor assembly and the intelligent control assembly, and is used to cover the motor assembly and the intelligent control assembly.

7. The metal dust-free polishing device and polishing method according to claim 1, characterized in that: The dust collection box (12) integrates a cyclone separator and a HEPA filter cartridge. The cyclone separator and the HEPA filter cartridge are arranged in a two-stage manner, with the cyclone separator used to adsorb large dust particles and the HEPA filter cartridge used to adsorb fine dust particles.

8. The metal dust-free polishing device according to claim 1, characterized in that: The dust collection box (12) has a transparent observation window (16) on its side wall.

9. A method for dust-free metal polishing, employing the apparatus as described in any one of claims 1-7, characterized in that... Includes the following steps: S1. Place the workpiece under the polishing wheel (4), and press the elastic sealing edge (15) against the surface of the workpiece to form a closed cavity; S2. Start the grinding process and start the vacuuming simultaneously. Large dust particles settle through the cyclone separator. S3. Fine dust particles are captured by the HEPA filter cartridge; S4. The dust sensor provides real-time feedback of the concentration value and dynamically adjusts the rotation speed of the back-blowing duct (19).

10. A method for dust-free metal polishing according to claim 9, characterized in that: A detection sensor is provided on the top of the workpiece. The detection sensor is connected to the control component (13). After the polishing wheel (4) completes the polishing area of ​​5cm², the control component (13) controls the rotating spindle (7) to reverse for 0.5 seconds to remove dust accumulated in the wheel gap.

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