A polishing device for sheet metal structural parts

Abstract

The application relates to the technical field of grinding machines, in particular to a sheet metal structural part polishing device which comprises a box body, a conveying mechanism, a rough polishing mechanism and a fine polishing mechanism. A polishing chamber is arranged in the box body; the conveying mechanism is arranged on the box body and penetrates the polishing chamber to form an inlet end and an outlet end; the rough polishing mechanism is arranged in the polishing chamber and located above the conveying mechanism, the rough polishing mechanism is arranged close to the inlet end, the rough polishing mechanism comprises multiple rough grinding assemblies arranged in sequence along the conveying direction of the conveying mechanism; the fine polishing mechanism is arranged in the polishing chamber and located above the conveying mechanism, the fine polishing mechanism is arranged close to the outlet end, the fine polishing mechanism comprises multiple fine grinding assemblies arranged in sequence along the conveying direction of the conveying mechanism, and the grinding precision of the multiple rough grinding assemblies and the multiple fine grinding assemblies is improved in sequence along the conveying direction of the conveying mechanism. The application has the effect of improving production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of grinding machines, and in particular to a grinding device for sheet metal structural parts. Background Technology

[0002] Currently, universal grinding machines, as versatile grinding equipment, are widely used for grinding the surfaces of various metal workpieces, especially sheet metal structural parts. In the field of sheet metal processing, after cutting, welding, or long-term storage, sheet metal structural parts often develop oxide scale, rust, or burrs on their surfaces. These surface defects can seriously affect the quality of subsequent surface treatment processes such as spraying and electroplating, leading to problems such as poor coating adhesion and uneven plating. Therefore, before surface treatment, sheet metal parts must be thoroughly ground to remove oxide scale, rust, and burrs, ensuring the metal surface achieves the flatness and cleanliness required for subsequent processes.

[0003] Grinding sheet metal structural parts typically involves two processes: rough grinding and fine grinding. Rough grinding removes thicker oxide scale, rust, and larger burrs, while fine grinding further improves surface smoothness and finish, meeting the surface requirements for subsequent painting or electroplating. Related technologies primarily utilize simple single-station grinding machines for this purpose. These machines are usually equipped with only a single grit of grinding material and can only perform one of the grinding processes: rough or fine grinding. When a sheet metal structural part requires both rough and fine grinding, the workpiece must be transferred to the fine grinding station after rough grinding, reloaded, and repositioned before the final fine grinding operation. This separation of rough and fine grinding necessitates multiple transfers and reloadings between different stations, each requiring additional time and manpower, resulting in a cumbersome process and significantly reducing the overall production efficiency of sheet metal structural parts.

[0004] Therefore, there is an urgent need for a grinding equipment for sheet metal structural parts. Summary of the Invention

[0005] To improve production efficiency, this application provides a grinding device for sheet metal structural parts.

[0006] This application provides a grinding device for sheet metal structural parts, which adopts the following technical solution: A grinding device for sheet metal structural parts, comprising: The housing contains a polishing chamber; A conveying mechanism is installed on the housing and extends through the grinding chamber to form an inlet and an outlet. A coarse grinding mechanism is disposed in the grinding chamber and located above the conveying mechanism. The coarse grinding mechanism is disposed near the feed end and includes a plurality of coarse grinding components arranged sequentially along the conveying direction of the conveying mechanism. A fine grinding mechanism is disposed in the grinding chamber and located above the conveying mechanism. The fine grinding mechanism is disposed near the discharge end. The fine grinding mechanism includes a plurality of fine grinding components arranged sequentially along the conveying direction of the conveying mechanism. The abrasive particle size of the plurality of coarse grinding components and the plurality of fine grinding components increases sequentially along the conveying direction of the conveying mechanism.

[0007] By adopting the above technical solution, the rough grinding mechanism and the fine grinding mechanism are integrated into the same grinding chamber. Sheet metal structural parts are conveyed continuously through multiple rough grinding components and multiple fine grinding components in one go, realizing "one-stop" automated processing from rough grinding to fine grinding, thereby improving production efficiency. At the same time, by rationally configuring the grinding precision of multiple rough and fine grinding components, making them increase in a gradient along the conveying direction, the surface of the sheet metal structural parts can be treated step by step and progressively through multiple stations with increasing grinding precision, thereby consistently obtaining a surface quality that meets the preset requirements.

[0008] Optionally, the coarse grinding assembly includes a first driving component, a driving roller, an adjusting frame, a pressure roller, a sanding belt, and a first lifting component. The first driving component and the adjusting frame are respectively vertically arranged in the grinding chamber. The driving roller is rotatably arranged in the grinding chamber and connected to the first driving component. The pressure roller is movably arranged on the adjusting frame and parallel to the driving roller. The pressure roller is arranged close to the conveying mechanism. The sanding belt is respectively wound around the driving roller and the pressure roller. The first lifting component is arranged on the adjusting frame and connected to the pressure roller. The first lifting component is used to drive the pressure roller to move closer to or away from the conveying mechanism.

[0009] By adopting the above technical solution, the height of the pressure roller can be adjusted by the first lifting component, which can precisely adjust the downward contact force of the sanding belt on the sheet metal structural parts, i.e. the grinding pressure. This allows the equipment to flexibly adapt to sheet metal structural parts of different materials and surface conditions, and to precisely control the grinding amount of each rough grinding station according to process requirements, demonstrating the "universal" adaptability of the equipment.

[0010] Optionally, a cleaning mechanism is included, which is disposed in the grinding chamber and located between two adjacent sanding belts. The cleaning mechanism is used to clean the abrasive shavings generated during the sanding process.

[0011] By adopting the above technical solution, an online cleaning mechanism is integrated into the grinding area, which can remove abrasive shavings and dust from the sanding belt in real time during equipment operation. This effectively prevents the sanding belt from clogging, maintains the sharpness of the sanding belt and grinding efficiency, thereby significantly extending the service life of the sanding belt, reducing consumable costs, and avoiding the problem of reduced surface quality of sheet metal structural parts due to sanding belt clogging.

[0012] Optionally, the cleaning mechanism includes an electrostatic neutralization unit and a cleaning component arranged sequentially along the return path of the sanding belt. The cleaning component and the electrostatic neutralization unit are respectively arranged in the grinding chamber and located between two adjacent sanding belts. The number of electrostatic neutralization units is equal to the number of sanding belts and they are arranged in a one-to-one correspondence.

[0013] By adopting the above technical solution, a two-step synergistic cleaning strategy of "neutralizing static electricity first, followed by physical removal" is employed. The static electricity neutralization unit first eliminates the electrostatic attraction between the abrasive shavings and the abrasive belt, making the adhered dust loose and creating the preconditions for efficient removal by the subsequent cleaning components. This improves the removal efficiency of micron-sized dust that is difficult to remove due to electrostatic adsorption.

[0014] Optionally, the cleaning assembly includes a first negative pressure drive and a cleaning tube. The first negative pressure drive is disposed on the housing, and the cleaning tube is disposed in the grinding chamber and located between two adjacent sanding belts. One end of the cleaning tube extends out of the grinding chamber and is connected to the first negative pressure drive. A slit is formed between the side wall of the cleaning tube and the sanding belt, and an air intake is provided on the cleaning tube that communicates with the slit.

[0015] By adopting the above technical solution, the "air knife" principle of fluid mechanics is utilized. The negative pressure drive component causes air to pass through the slit at high speed, forming a strong shearing airflow. This can powerfully peel off and instantly suck away the loosened dust that has been neutralized by static electricity from the micro gaps of the sanding belt. The cleaning efficiency is high and non-contact, and it will not cause secondary damage to the sanding belt.

[0016] Optionally, a dust collection bucket is slidably connected to one end of the cleaning tube near the conveying mechanism. An elastic element is provided between the dust collection bucket and the cleaning tube. The elastic element is used to push the dust collection bucket closer to the conveying mechanism. An arc-shaped guide plate is provided on the side of the end of the dust collection bucket away from the cleaning tube.

[0017] By adopting the above technical solution, a slidably connected dust collection hopper is installed at the end of the cleaning pipe near the conveying mechanism, and an elastic element is installed between the dust collection hopper and the cleaning pipe to push the dust collection hopper closer to the conveying mechanism. This allows the dust collection hopper to fit tightly against the conveying mechanism, enhancing the adsorption effect on abrasive debris. An arc-shaped guide plate is installed on the side of the dust collection hopper away from the cleaning pipe, which helps guide abrasive debris into the dust collection hopper. At the same time, the dust collection hopper can float within a certain range to adapt to sheet metal structural parts of different thicknesses.

[0018] Optionally, the static neutralization unit includes a static elimination ion bar that extends along the width of the sanding belt and is mounted on the adjustment frame, with the ion emission surface of the static elimination ion bar facing the sanding belt.

[0019] By adopting the above technical solution, an electrostatic eliminator ion bar extending along the width of the sanding belt and with its ion emission surface facing the sanding belt is set as an electrostatic neutralization unit in the sanding equipment for sheet metal structural parts. This can neutralize the electrostatics of the sanding belt, preventing the sanding belt from adsorbing abrasive particles due to electrostatics. Combined with the cleaning component, it can better clean the abrasive particles generated during the sanding process, ensuring the normal sanding performance of the sanding belt, thereby improving the sanding quality and efficiency of sheet metal structural parts.

[0020] Optionally, the fine grinding assembly includes a mounting base, a second drive component, a second lifting component, and a fine grinding roller. The mounting base is movably disposed in the grinding chamber, the second lifting component is disposed in the grinding chamber and connected to the mounting base, the second drive component is disposed on the mounting base, and the fine grinding roller is rotatably disposed on the mounting base and connected to the second drive component.

[0021] By adopting the above technical solution, the mounting base is movably set in the grinding chamber, the second lifting component is connected to the mounting base, and the position of the mounting base can be adjusted, thereby adjusting the height of the fine grinding roller to adapt to sheet metal structural parts of different thicknesses; the second driving component is connected to the fine grinding roller and can drive the fine grinding roller to rotate, so as to perform fine grinding processing on the sheet metal structural parts.

[0022] Optionally, the grinding chamber is provided with a positioning component, which includes a third lifting component, a positioning frame, and multiple positioning rollers disposed on the positioning frame. The third lifting component is disposed in the grinding chamber, and the positioning frame is disposed in the grinding chamber and disposed along the conveying direction of the conveying mechanism. The positioning frame is connected to the third lifting component, and the multiple positioning rollers are respectively disposed on the side of the coarse grinding component and / or the fine grinding component. The positioning rollers are used to limit and guide the sheet metal structural parts.

[0023] By adopting the above technical solution, and by setting up a positioning roller that can be raised and lowered as a whole on the side of the grinding station, the working height of the positioning roller can be adjusted according to the height of the sheet metal structural parts, thereby providing effective support and guidance for the sheet metal structural parts, preventing the sheet metal structural parts from shifting or vibrating when subjected to lateral grinding force, and ensuring the accuracy of the grinding trajectory.

[0024] Optionally, a dust collection mechanism is included, which includes a negative pressure unit and a dust collection hood. The negative pressure unit is disposed on the housing, and the dust collection hood is disposed in the grinding chamber and connected to the negative pressure unit. The dust collection hood covers the plurality of grinding components.

[0025] By adopting the above technical solution, the negative pressure unit can remove a large amount of fine dust generated during fine grinding at the source through the dust suction hood, preventing the fine dust from spreading and causing secondary pollution in the grinding chamber, ensuring the cleanliness of the fine grinding process, and improving the internal and external environment of the equipment.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The grinding chamber is equipped with a rough grinding mechanism and a fine grinding mechanism, which can complete the entire process from rough processing to fine processing in one conveying process, significantly improving the consistency and smoothness of surface treatment and improving the overall processing efficiency; 2. Through the coordinated operation of the electrostatic neutralization unit and the cleaning components, micron-sized dust adhering to the abrasive gap of the sanding belt due to electrostatic adsorption can be removed, thereby effectively extending the service life of the sanding belt and reducing consumable costs and downtime losses caused by replacing the sanding belt. 3. The positioning component can position sheet metal structural parts to prevent them from tilting or shifting, and improve the stability of conveying and grinding. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a grinding device for sheet metal structural parts according to Embodiment 1 of this application.

[0028] Figure 2 This is a side view of a grinding device for sheet metal structural parts according to Embodiment 1 of this application.

[0029] Figure 3 It is along Figure 2 A partial structural cross-sectional view of line AA in the middle.

[0030] Figure 4 This is a schematic diagram of the positioning component, rough grinding mechanism and fine grinding mechanism in Embodiment 1 of this application.

[0031] Figure 5 This is a partial structural schematic diagram of a grinding device for sheet metal structural parts according to Embodiment 2 of this application.

[0032] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0033] Explanation of reference numerals in the attached figures: 1. Housing; 11. Grinding chamber; 12. Opening and closing door; 13. Positioning assembly; 131. Third lifting component; 132. Positioning frame; 133. Positioning roller; 2. Conveying mechanism; 21. Feeding end; 22. Discharge end; 3. Rough grinding mechanism; 31. Rough grinding assembly; 311. First driving component; 312. Drive roller; 313. Adjusting frame; 314. Pressure roller; 315. Sanding belt; 316. First lifting component; 4. Fine grinding mechanism; 1. Grinding component; 411. Mounting base; 412. Second drive component; 413. Second lifting component; 414. Grinding roller; 5. Cleaning mechanism; 51. Cleaning component; 511. First negative pressure drive component; 512. Cleaning pipe; 5121. Air intake; 52. Static neutralization unit; 53. Slit; 54. Dust collection hopper; 541. Arc-shaped guide plate; 55. Elastic component; 6. Dust collection mechanism; 61. Negative pressure unit; 62. Dust collection hood. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a grinding device for sheet metal structural parts.

[0036] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Example 1: Refer to Figures 1 to 3 A sheet metal structural component grinding device includes a housing 1, a conveying mechanism 2, a rough grinding mechanism 3, a fine grinding mechanism 4, a cleaning mechanism 5, and a dust collection mechanism 6. The conveying mechanism 2, the rough grinding mechanism 3, the fine grinding mechanism 4, the cleaning mechanism 5, and the dust collection mechanism 6 are respectively mounted on the housing 1. The conveying mechanism 2 is used to convey the sheet metal structural component, the rough grinding mechanism 3 is used to perform rough grinding on the sheet metal structural component, the fine grinding mechanism 4 is used to perform fine grinding on the sheet metal structural component, the cleaning mechanism 5 is used to clean the rough grinding mechanism 3, and the dust collection mechanism 6 is used to clean the grinding debris generated during the operation of the fine grinding mechanism 4.

[0038] A grinding chamber 11 is formed inside the housing 1, and passageways for sheet metal structural parts to enter and exit are respectively opened at the front and rear ends of the housing 1. A switch door 12 is provided on the side wall of the housing 1 to facilitate the inspection of the mechanism inside the grinding chamber 11.

[0039] Reference Figure 1 and Figure 3 The conveying mechanism 2 is mounted on the housing 1 and extends through the grinding chamber 11. In this embodiment, the conveying mechanism 2 is a flat conveyor belt driven by a motor, the upper surface of which forms the bearing surface of the sheet metal structural parts. One end of the conveying mechanism 2 extends from one side of the housing 1 to form a feed end 21, used to receive the sheet metal structural parts to be ground; the other end extends from the other side of the housing 1 to form a discharge end 22, used to output the ground sheet metal structural parts. The conveying mechanism 2 operates at a constant speed, continuously conveying the sheet metal structural parts from the feed end 21 to the discharge end 22.

[0040] The coarse grinding mechanism 3 is located inside the grinding chamber 11 and above the conveying mechanism 2, and is generally arranged close to the feed end 21. The coarse grinding mechanism 3 includes a plurality of coarse grinding components 31 arranged sequentially along the conveying direction of the conveying mechanism 2. In this embodiment, there are two sets of coarse grinding components 31, and the two sets of coarse grinding components 31 are arranged at intervals.

[0041] Reference Figure 3 and Figure 4 The coarse grinding assembly 31 includes a first driving component 311, a driving roller 312, an adjusting frame 313, a pressure roller 314, a sanding belt 315, and a first lifting component 316. The first driving component 311 is a motor, vertically fixed within the grinding chamber 11, and positioned above the adjusting frame 313. The driving roller 312 is rotatably mounted in the upper part of the grinding chamber 11 via bearings, with its axis perpendicular to the conveying direction of the conveying mechanism 2. One end of the driving roller 312 is connected to the output shaft of the first driving component 311 via a coupling. In this embodiment, the first driving component 311 is a motor to drive the driving roller 312 to rotate.

[0042] The adjusting frame 313 is fixedly installed on the inner wall of the grinding chamber 11. The pressure roller 314 is movably mounted on the adjusting frame 313, and the axis of the pressure roller 314 is parallel to the axis of the drive roller 312. The pressure roller 314 is located close to the conveying mechanism 2, that is, the pressure roller 314 is located directly below the drive roller 312, and maintains a certain distance from the upper surface of the conveying mechanism 2.

[0043] The abrasive belt 315 is a ring-shaped flexible grinding belt with abrasive particles attached to its outer surface. The abrasive belt 315 is wound around the drive roller 312 and the pressure roller 314 respectively, forming a vertical ring circuit. In this embodiment, the abrasive particle size of the two abrasive belts 315 decreases sequentially along the conveying direction, thereby achieving a gradual improvement in grinding accuracy.

[0044] The section of the sanding belt 315 closest to the conveying mechanism 2 is the working section, which is the section that contacts the sheet metal structural parts and performs grinding; the section of the sanding belt 315 furthest from the conveying mechanism 2 is the return section, which is the section that returns upward to the drive roller 312 after grinding is completed.

[0045] The first lifting component 316 is mounted on the adjusting frame 313 and is connected to the bearing seat of the pressure roller 314. In this embodiment, the first lifting component 316 is a cylinder to drive the pressure roller 314 to move up and down along the adjusting frame 313, thereby moving the pressure roller 314 closer to or away from the conveying mechanism 2.

[0046] When the pressure roller 314 moves downward, the working section of the sanding belt 315 is pressed against the sheet metal structure on the conveying mechanism 2, increasing the grinding pressure; when the pressure roller 314 moves upward, the working section of the sanding belt 315 moves away from the sheet metal structure, reducing the grinding pressure or disengaging from contact, thereby allowing for precise adjustment of the grinding pressure of the sanding belt 315 on the sheet metal structure and flexible adaptation to sheet metal structures of different thicknesses.

[0047] The fine grinding mechanism 4 is disposed within the grinding chamber 11 and located above the conveying mechanism 2, with the fine grinding mechanism 4 positioned close to the discharge end 22. The fine grinding mechanism 4 includes a plurality of fine grinding components 41 arranged sequentially along the conveying direction of the conveying mechanism 2. In this embodiment, the number of fine grinding components 41 is two.

[0048] The fine grinding assembly 41 includes a mounting base 411, a second driving member 412, a second lifting member 413, and a fine grinding roller 414. The mounting base 411 is movably mounted on the inner wall of the grinding chamber 11 via a vertical slide rail, allowing the mounting base 411 to slide vertically up and down. The second lifting member 413 is fixedly mounted on the inner wall of the grinding chamber 11 and is connected to the mounting base 411. In this embodiment, the second lifting member 413 is a cylinder to drive the mounting base 411 to rise and fall. In other embodiments, the second lifting member 413 may also be a bolt, allowing the height of the mounting base 411 to be adjusted by rotating the bolt.

[0049] The second drive component 412 is fixedly mounted on the mounting base 411, and the fine grinding roller 414 is rotatably mounted on the mounting base 411 via bearings and connected to the second drive component 412. In this embodiment, the second drive component 412 is a motor to drive the fine grinding roller 414 to rotate, and the axial direction of the fine grinding roller 414 is perpendicular to the conveying direction of the conveying mechanism 2. The abrasive particle size of the abrasive layers of the two fine grinding rollers 414 decreases sequentially along the conveying direction, further improving the grinding accuracy.

[0050] A positioning assembly 13 is provided inside the grinding chamber 11. The positioning assembly 13 includes a third lifting member 131, a positioning frame 132, and multiple positioning rollers 133 mounted on the positioning frame 132. The third lifting member 131 is fixedly mounted on the inner wall of the grinding chamber 11. The positioning frame 132 is located inside the grinding chamber 11 and extends along the conveying direction of the conveying mechanism 2, and the positioning frame 132 is connected to the movable end of the third lifting member 131. In this embodiment, the third lifting member 131 is a cylinder to facilitate adjustment of the overall height position of the positioning frame 132 to accommodate sheet metal structural parts of different thicknesses.

[0051] Multiple positioning rollers 133 are mounted on the positioning frame 132. The axis of each positioning roller 133 is parallel to the axis of the fine grinding roller 414, and the multiple positioning rollers 133 are respectively arranged on the side of the coarse grinding assembly 31 and / or the fine grinding assembly 41. A limiting channel is formed between the positioning rollers 133 and the conveying mechanism 2. In this embodiment, the positioning rollers 133 are rubber rollers, and the surface of the positioning rollers 133 is provided with anti-slip texture to prevent relative sliding between the positioning rollers 133 and the sheet metal structural parts.

[0052] When the sheet metal structural component moves forward on the conveying mechanism 2, the positioning roller 133 contacts the top surface of the sheet metal structural component to apply downward pressure to the sheet metal structural component, thereby limiting the sheet metal structural component and preventing it from shifting laterally or rotating under the action of the grinding force. This ensures that the sheet metal structural component moves forward stably along the preset straight path, thus guaranteeing the accuracy of the grinding trajectory and the uniformity of the grinding effect.

[0053] The cleaning mechanism 5 is disposed within the grinding chamber 11, located between two adjacent sanding belts 315. In this embodiment, the cleaning mechanism 5 includes a cleaning component 51, which includes a first negative pressure drive 511 and a cleaning tube 512. The first negative pressure drive 511 is disposed on the outer wall of the housing 1.

[0054] The cleaning tube 512 is disposed in the grinding chamber 11 and located between two adjacent sanding belts 315. One end of the cleaning tube 512 is connected to the first negative pressure drive 511, and the other end of the cleaning tube 512 extends to a position close to the conveying mechanism 2.

[0055] In this embodiment, the first negative pressure drive component 511 is a centrifugal fan, which facilitates the formation of negative pressure inside the cleaning pipe 512, thereby attracting the grinding debris and transporting it to the air outlet of the first negative pressure drive component 511 for centralized collection and processing.

[0056] Reference Figure 1 and Figure 3The dust collection mechanism 6 includes a negative pressure unit 61 and a dust collection hood 62. The negative pressure unit 61 is disposed on the outer wall of the housing 1. In this embodiment, the negative pressure unit 61 is a centrifugal fan. The dust collection hood 62 is disposed inside the grinding chamber 11 and covers the two fine grinding rollers 414. The internal space of the dust collection hood 62 is connected to the air inlet of the negative pressure unit 61 through a pipe.

[0057] During operation, the negative pressure unit 61 creates a negative pressure environment within the dust collection hood 62, which concentrates and collects the dispersed dust generated by the fine grinding roller 414 during the grinding process. Since the fine grinding roller 414 generates a large amount of fine dust during high-speed rotation grinding, and this dust tends to drift upwards, the dust collection hood 62 covers and sucks it from above, effectively controlling the dust within the scope of the dust collection hood 62 and preventing it from spreading to other areas of the grinding chamber 11 or escaping from the gaps in the housing 1.

[0058] The implementation principle of the sheet metal structural component grinding equipment in this embodiment is as follows: The sheet metal structural component to be processed is placed at the feed end 21 of the conveying mechanism 2. After the equipment is started, the conveying mechanism 2 feeds the sheet metal structural component into the grinding chamber 11 at a uniform speed. The sheet metal structural component first passes through the sanding belts 315. The two sanding belts 315 perform rough grinding on the upper surface of the sheet metal structural component with progressively increasing grinding precision, successively completing processes such as removing oxide scale, removing welding slag, and preliminary leveling. During this process, the positioning roller 133 provides lateral restraint for the sheet metal structural component. Subsequently, the sheet metal structural component continues to move forward and passes through two fine grinding rollers 414 in sequence. The fine grinding rollers 414 polish the surface of the sheet metal structural component. Finally, the sheet metal structural component that has completed all grinding processes is output from the discharge end 22.

[0059] Example 2: Refer to Figure 5 The difference between this embodiment and embodiment 1 is that the cleaning mechanism 5 further includes an electrostatic neutralization unit 52, and the electrostatic neutralization unit 52 and the cleaning tube 512 are arranged sequentially along the return path of the sand belt 315.

[0060] The return path of the sanding belt 315 refers to the path along which the sanding belt 315 moves from the working section (the lower section in contact with the sheet metal structure) to the upper section of the drive roller 312.

[0061] Reference Figure 5 and Figure 6 The electrostatic neutralization unit 52 is set in the grinding chamber 11 and located between two adjacent sanding belts 315. The number of electrostatic neutralization units 52 is equal to the number of sanding belts 315 and they are set one-to-one. That is, each sanding belt 315 is equipped with an electrostatic neutralization unit 52 on its return path.

[0062] In this embodiment, the static neutralization unit 52 includes a static elimination ion bar. The static elimination ion bar extends laterally along the width direction of the abrasive belt 315 and is disposed in the grinding chamber 11, and is fixed to the adjustment frame 313 by a mounting bracket. The ion emission surface of the static elimination ion bar is disposed facing the grinding surface of the abrasive belt 315 and is kept at a relatively close distance to the grinding surface of the abrasive belt 315.

[0063] During the grinding process, the high-speed friction between the abrasive belt 315 and the sheet metal structural parts generates a large amount of static charge. This static charge causes metal shavings and abrasive fragments to firmly adhere to the gaps between the abrasive particles on the abrasive belt 315. When the abrasive belt 315 returns to the surface and passes over the electrostatic eliminator, the high-concentration cloud of positive and negative ions generated by the electrostatic eliminator covers the entire width of the abrasive belt 315, neutralizing the static charge on its surface. After the static charge is neutralized, the abrasive shavings that were originally firmly adhered by electrostatic force lose their adhesion and become loose, creating favorable conditions for subsequent physical cleaning.

[0064] Reference Figure 5 The cleaning tube 512 extends along the width direction of the abrasive belt 315, and a small gap is maintained between the sidewall of the cleaning tube 512 facing the grinding surface of the abrasive belt 315 and the grinding surface of the abrasive belt 315, forming a slit 53. In this embodiment, the width of the slit 53 is 1 mm to 3 mm. An air intake 5121 communicating with the slit 53 is provided on the cleaning tube 512 along its length direction.

[0065] When the first negative pressure drive unit 511 operates, a negative pressure is formed inside the cleaning pipe 512. External air is drawn in at high speed from both ends and the surrounding area of ​​the slit 53, forming a high-speed airflow at the slit 53, producing an effect similar to an "air knife". This high-speed airflow sweeps across the grinding surface of the abrasive belt 315, forcefully peeling off and rolling up the loosely attached abrasive debris, which has been treated by the electrostatic neutralization unit 52, from the gaps between the abrasive particles of the abrasive belt 315. The peeled abrasive debris enters the cleaning pipe 512 through the air intake 5121 with the airflow, and is finally transported through the pipeline to the air outlet of the first negative pressure drive unit 511 for centralized collection and treatment.

[0066] A vacuum hopper 54 is slidably connected to one end of the cleaning tube 512 near the conveying mechanism 2. The vacuum hopper 54 is funnel-shaped with its opening facing the conveying mechanism 2. An elastic element 55 is provided between the vacuum hopper 54 and the cleaning tube 512. In this embodiment, the elastic element 55 is a compression spring, which allows the elastic element 55 to push the vacuum hopper 54 closer to the conveying mechanism 2, so that the opening end of the vacuum hopper 54 is always close to or lightly touches the upper surface of the sheet metal structure.

[0067] An arc-shaped guide plate 541 is provided on the side of the end of the dust collection bucket 54 away from the cleaning tube 512. The arc-shaped guide plate 541 extends outward along the opening edge of the dust collection bucket 54 to form an arc-shaped guide surface. When sheet metal structural parts of different thicknesses pass by, the dust collection bucket 54 can adaptively float up and down under the elastic force of the elastic member 55, always maintaining a close fit with the surface of the sheet metal structural parts.

[0068] The implementation principle of Example 2 is as follows: During equipment operation, the sheet metal structural parts advance on the conveyor mechanism 2, passing sequentially through the sanding belt 315 and the fine grinding roller 414 for progressive grinding from coarse to fine. In the coarse grinding stage, each sanding belt 315 enters the return path after completing one grinding cycle. First, it passes through the corresponding electrostatic eliminator ion bar, neutralizing the static charge on the surface of the sanding belt 315 and significantly reducing the adsorption force of the abrasive shavings. Subsequently, the sanding belt 315 passes through the slit 53 area, where a high-speed negative pressure airflow peels the loose abrasive shavings from the surface of the sanding belt 315 and sucks them into the cleaning pipe 512. At the same time, the dust collection hopper 54 located at the lower end of the sanding belt 315 is pushed close to the surface of the sheet metal structural parts by the elastic element 55, collecting the splashed abrasive shavings while grinding. After cleaning, the sanding belt 315 re-enters the working section in a clean state to continue the efficient grinding of subsequent sheet metal structural parts.

[0069] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A grinding device for sheet metal structural parts, characterized in that, include: Box (1), and a polishing chamber (11) is provided inside the box (1); A conveying mechanism (2) is provided on the housing (1), and the conveying mechanism (2) passes through the grinding chamber (11) to form a feed end (21) and a discharge end (22). The coarse grinding mechanism (3) is located in the grinding chamber (11) and above the conveying mechanism (2). The coarse grinding mechanism (3) is located near the feed end (21). The coarse grinding mechanism (3) includes a plurality of coarse grinding components (31) arranged sequentially along the conveying direction of the conveying mechanism (2). The fine grinding mechanism (4) is located in the grinding chamber (11) and above the conveying mechanism (2). The fine grinding mechanism (4) is located near the discharge end (22). The fine grinding mechanism (4) includes a plurality of fine grinding components (41) arranged sequentially along the conveying direction of the conveying mechanism (2). The abrasive particle size of the plurality of coarse grinding components (31) and the plurality of fine grinding components (41) increases sequentially along the conveying direction of the conveying mechanism (2).

2. The grinding equipment for sheet metal structural parts according to claim 1, characterized in that: The coarse grinding assembly (31) includes a first driving member (311), a driving roller (312), an adjusting frame (313), a pressure roller (314), a sanding belt (315), and a first lifting member (316). The first driving member (311) and the adjusting frame (313) are respectively arranged vertically in the grinding chamber (11). The driving roller (312) is rotatably arranged in the grinding chamber (11) and connected to the first driving member (311). The pressure roller (314) is movably arranged. The adjustment frame (313) is parallel to the drive roller (312), the pressure roller (314) is located close to the conveying mechanism (2), the sand belt (315) is wound around the drive roller (312) and the pressure roller (314) respectively, the first lifting member (316) is located on the adjustment frame (313) and connected to the pressure roller (314), and the first lifting member (316) is used to drive the pressure roller (314) to move closer to or away from the conveying mechanism (2).

3. The grinding equipment for sheet metal structural parts according to claim 2, characterized in that: The system includes a cleaning mechanism (5), which is located inside the grinding chamber (11) and between two adjacent sanding belts (315). The cleaning mechanism (5) is used to clean the abrasive shavings generated during the sanding process of the sanding belts (315).

4. The grinding equipment for sheet metal structural parts according to claim 3, characterized in that: The cleaning mechanism (5) includes an electrostatic neutralization unit (52) and a cleaning component (51) arranged sequentially along the return path of the sanding belt (315). The cleaning component (51) and the electrostatic neutralization unit (52) are respectively arranged in the grinding chamber (11) and located between two adjacent sanding belts (315). The number of electrostatic neutralization units (52) is equal to the number of sanding belts (315) and they are arranged in a one-to-one correspondence.

5. The grinding equipment for sheet metal structural parts according to claim 4, characterized in that: The cleaning component (51) includes a first negative pressure drive (511) and a cleaning tube (512). The first negative pressure drive (511) is disposed on the housing (1). The cleaning tube (512) is disposed in the grinding chamber (11) and located between two adjacent sanding belts (315). One end of the cleaning tube (512) extends out of the grinding chamber (11) and is connected to the first negative pressure drive (511). A slit (53) is formed between the side wall of the cleaning tube (512) and the sanding belt (315). An air intake (5121) communicating with the slit (53) is provided on the cleaning tube (512).

6. The grinding equipment for sheet metal structural parts according to claim 5, characterized in that: A dust collection bucket (54) is slidably connected to one end of the cleaning tube (512) near the conveying mechanism (2). An elastic element (55) is provided between the dust collection bucket (54) and the cleaning tube (512). The elastic element (55) is used to push the dust collection bucket (54) closer to the conveying mechanism (2). An arc-shaped guide plate (541) is provided on the side of the end of the dust collection bucket (54) away from the cleaning tube (512).

7. The grinding equipment for sheet metal structural parts according to claim 4, characterized in that: The electrostatic neutralization unit (52) includes an electrostatic eliminator ion bar that extends along the width of the sand belt (315) and is disposed on the adjustment frame (313), with the ion emission surface of the electrostatic eliminator ion bar facing the sand belt (315).

8. The grinding equipment for sheet metal structural parts according to claim 1, characterized in that: The fine grinding assembly (41) includes a mounting base (411), a second drive component (412), a second lifting component (413), and a fine grinding roller (414). The mounting base (411) is movably disposed in the grinding chamber (11). The second lifting component (413) is disposed in the grinding chamber (11) and connected to the mounting base (411). The second drive component (412) is disposed on the mounting base (411). The fine grinding roller (414) is rotatably disposed on the mounting base (411) and connected to the second drive component (412).

9. The grinding equipment for sheet metal structural parts according to claim 1, characterized in that: The grinding chamber (11) is provided with a positioning component (13). The positioning component (13) includes a third lifting member (131), a positioning frame (132), and multiple positioning rollers (133) arranged on the positioning frame (132). The third lifting member (131) is arranged in the grinding chamber (11). The positioning frame (132) is arranged in the grinding chamber (11) and along the conveying direction of the conveying mechanism (2). The positioning frame (132) is connected to the third lifting member (131). The multiple positioning rollers (133) are respectively arranged on the side of the coarse grinding component (31) and / or the fine grinding component (41). The positioning rollers (133) are used to limit and guide the sheet metal structural parts.

10. The grinding equipment for sheet metal structural parts according to claim 1, characterized in that: The system includes a dust collection mechanism (6), which includes a negative pressure unit (61) and a dust collection hood (62). The negative pressure unit (61) is disposed on the housing (1), and the dust collection hood (62) is disposed in the grinding chamber (11) and connected to the negative pressure unit (61). The dust collection hood (62) covers the multiple fine grinding components (41).

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