A sheet metal part double-edge polishing production line and polishing method

Abstract

The application discloses a sheet metal piece double-face edge polishing production line and a polishing method, and relates to the technical field of sheet metal piece polishing, in particular to a sheet metal piece double-face edge polishing production line and a polishing method. The sheet metal piece double-face edge polishing production line comprises a control system and sequentially arranged feeding stations, lower surface deburring machines, upper surface deburring machines, 2D visual inspection stations and discharging stations along the conveying direction of the workpieces. The feeding stations, the lower surface deburring machines, the upper surface deburring machines, the 2D visual inspection stations and the discharging stations are sequentially and drivingly connected through constant-speed conveying belts. The control system is electrically connected with the lower surface deburring machines, the upper surface deburring machines, the 2D visual inspection stations and the discharging stations. The lower surface deburring machines are provided with upper magnetic force conveying belts and multiple groups of transversely arranged abrasive belt polishing mechanisms. The upper surface deburring machines are provided with lower magnetic force conveying belts, roller brush control motors and multiple groups of roller brush assemblies. The sheet metal piece double-face edge polishing production line can be used for deburring and processing the double-face cutting edges of sheet metal pieces with a thickness of 1-5 mm and a width of 50-1300 mm, and can be used for processing the sharp corners of the edges of the sheet metal pieces.

Description

Technical Field

[0001] This invention relates to a production line and method for grinding double-sided edges of sheet metal parts, belonging to the field of edge grinding technology. Background Technology

[0002] After the sheet metal components for loaders are cut and processed, sharp corners and burrs remain at the edges. If painting is carried out directly at these edges, the paint film is prone to be thin, resulting in poor adhesion. Under operating conditions, the workpiece is susceptible to edge corrosion and paint peeling, affecting the appearance quality and service life of the components. Therefore, the edges of the sheet metal parts need to be sanded before painting to achieve a smooth transition and ensure the effectiveness of subsequent painting processes.

[0003] Currently, most edge grinding production lines in the industry can only perform single-sided grinding of sheet metal parts. After grinding one side, the sheet metal part needs to be removed from the production line, manually flipped, and then reloaded for grinding the other side. Multiple transfers and reloading of workpieces not only increase the number of work steps and the intensity of manual labor, but also result in low overall grinding efficiency, making it difficult to meet the capacity requirements of large-scale automated production. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a sheet metal double-sided edge grinding production line and grinding method, which can perform deburring, blunting of sharp edges and corners, and other processing on the double-sided cut edges of sheet metal parts with a thickness of 1-5mm and a width of 50-1300mm. The unloading part is equipped with a 2D vision camera and an unloading robot, which can automatically unload and stack the sheet metal parts after edge grinding.

[0005] To achieve the above objectives, the present invention employs a sheet metal double-sided edge grinding production line, comprising a control system and a loading station, a lower surface deburring machine, an upper surface deburring machine, a 2D vision inspection station, and an unloading station arranged sequentially along the workpiece conveying direction; the loading station, the lower surface deburring machine, the upper surface deburring machine, the 2D vision inspection station, and the unloading station are sequentially connected by a constant speed conveyor belt, and the control system is electrically connected to the lower surface deburring machine, the upper surface deburring machine, the 2D vision inspection station, and the unloading station respectively;

[0006] The lower surface deburring machine is equipped with an upper magnetic conveyor belt and multiple sets of horizontally arranged sanding belt grinding mechanisms. The upper magnetic conveyor belt is used to adsorb and fix the sheet metal parts to prevent the workpieces from slipping during the grinding process. The multiple sets of sanding belt grinding mechanisms operate along the direction perpendicular to the workpiece conveying and are used to deburr and blunt the edges of the lower surface of the sheet metal parts.

[0007] The upper surface deburring machine is equipped with a lower magnetic conveyor belt, a roller brush control motor, and multiple sets of roller brush assemblies. The multiple sets of roller brush assemblies are suspended above the lower magnetic conveyor belt. The multiple sets of roller brush assemblies can revolve as a whole under the drive of the roller brush control motor, and each set of roller brush assemblies can rotate independently and switch between forward and reverse rotation. It is used to deburr and blunt the edges of the upper surface of sheet metal parts.

[0008] The 2D vision inspection station is used to collect image data of the polished sheet metal parts, and to complete the detection of polishing defects and the identification and classification of workpieces; the unloading station can realize the automated sorting and palletizing of sheet metal parts based on the detection data of the 2D vision inspection station.

[0009] As an improvement, the loading station is equipped with a conveying mechanism, which is used to carry, store and transport sheet metal parts to be ground, and supports mixed-flow loading and continuous processing of sheet metal parts of the same thickness but different shapes.

[0010] As an improvement, the lower surface deburring machine also includes a conveyor roller, a dust collector, a lower sanding belt, a lower sanding belt, and a lower sanding belt.

[0011] The conveyor rollers are positioned below the upper magnetic conveyor belt to support sheet metal parts and facilitate conveying. The lower sanding belts 1, 2, and 3 are arranged parallel and evenly below the upper magnetic conveyor belt. The lower surface deburring machine is connected to the dust collector 1. The lower sanding belts 1, 2, and 3 are all detachable and replaceable. The height of the upper magnetic conveyor belt is adjustable to adjust the gap between the sanding belt and the conveyor belt, adapting to the grinding of sheet metal parts of different thicknesses.

[0012] As an improvement, the upper surface deburring machine also includes a dust collector 2, a roller brush 1, a roller brush 2, a roller brush 3, and a roller brush 4.

[0013] The roller brushes 1, 2, 3, and 4 together form a roller brush assembly, and all of them are detachable and replaceable. The height of the lower magnetic conveyor belt is adjustable to adjust the grinding gap between the roller brush assembly and the conveyor belt. The upper surface deburring machine is connected to the dust collector 2 to collect the metal dust generated during grinding.

[0014] As an improvement, the 2D vision inspection station includes a supplementary lighting lamp, a vision camera, and a vision processing unit; the supplementary lighting lamp is used to provide a stable inspection light source, the vision camera is mounted above the conveyor belt of the station to acquire images of sheet metal parts and transmit them to the vision processing unit; the vision processing unit is electrically connected to the control system, and the vision processing unit is configured to construct a two-dimensional data model of the workpiece based on the received images, complete the detection of grinding defects, workpiece position correction and model classification, and transmit the detection data to the control system.

[0015] As an improvement, the unloading station includes a handling robot, a workpiece gripper, and several material trays; the workpiece gripper is installed at the end of the handling robot, and the handling robot is connected to the control system signal, enabling it to classify, pick up, sort, and stack the polished sheet metal parts according to the detection data from the 2D vision inspection station.

[0016] As an improvement, a safety light curtain is installed around the unloading station for operational safety protection; a material outlet is provided at the end of the conveyor belt of the unloading station, and sheet metal parts exceeding the handling load of the handling robot can be manually unloaded through the material outlet.

[0017] A second aspect of the present invention also provides a method for grinding double-sided edges of sheet metal parts, applied to the aforementioned sheet metal part double-sided edge grinding production line, comprising the following steps:

[0018] S1. Mixed-flow feeding: Sheet metal parts of the same thickness but different shapes to be ground are randomly combined and placed on the conveyor mechanism of the feeding station, and continuously conveyed downstream by a constant speed conveyor belt.

[0019] S2. Lower Surface Grinding: Sheet metal parts enter the lower surface deburring machine. The upper magnetic conveyor belt adsorbs and fixes the sheet metal parts. The conveyor roller supports and conveys them. The lower sanding belts 1, 2, and 3 move laterally to remove burrs and slag from the lower surface of the sheet metal parts and to blunt the edges.

[0020] S3. Upper surface grinding: The sheet metal parts enter the upper surface deburring machine. The roller brush control motor drives roller brush one, roller brush two, roller brush three and roller brush four to revolve as a whole. At the same time, each roller brush rotates independently and can switch between forward and reverse directions to remove burrs and slag from the upper surface of the sheet metal parts and complete the blunting of the upper surface edges.

[0021] S4. Visual Inspection: The polished sheet metal parts enter the 2D visual inspection station, where workpiece images are captured and defect detection and workpiece classification are completed. The inspection data is transmitted to the control system in real time.

[0022] S5. Sorting and unloading: The control system controls the handling robot to classify, grab, and stack sheet metal parts according to the detection data.

[0023] As an improvement, before the formal grinding operation, select the appropriate grit size of the lower sanding belt and roller brush according to the hardness of the sheet metal to be processed; and adjust the gap between the upper magnetic conveyor belt and the lower sanding belt, and the gap between the lower magnetic conveyor belt and the roller brush according to the thickness of the sheet metal to be processed.

[0024] As an improvement, the thickness of the sheet metal parts to be ground is 1mm to 5mm and the width is 50mm to 1300mm. Sheet metal parts of the same thickness that meet the size range can be fed in a disordered mixed flow, and the automated grinding process of double-sided edges can be completed in a single feeding.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] (1) This invention enables sheet metal parts to complete continuous automated grinding of double-sided edges in one loading. The production line is set with a lower surface deburring machine and an upper surface deburring machine in sequence along the conveying direction. The workpiece is transported by a constant speed conveyor belt. There is no need to manually flip the workpiece and clamp it a second time. This eliminates the positioning error introduced by the second clamping and shortens the process flow time. Compared with the existing grinding scheme that requires secondary clamping and transfer, it significantly improves the processing efficiency and provides a foundation for the integrated realization of subsequent online inspection and automatic sorting.

[0027] (2) The deburring machine for the lower surface uses an upper magnetic conveyor belt to adsorb and position the sheet metal parts. It works in conjunction with the conveyor roller to support the workpiece. It can resist the cutting force generated by the horizontal grinding of the sand belt, effectively suppress the slippage and movement of the thin sheet metal parts during the grinding process, avoid the problem of uneven grinding depth and local missed grinding, and ensure the consistency of deburring and blunting of the lower surface edges of a large number of workpieces.

[0028] (3) The deburring machine for the upper surface adopts a composite motion form with the entire roller brush assembly revolving around the center and a single roller brush rotating independently and being able to switch between forward and reverse rotation. Unlike conventional unidirectional fixed-axis rotating roller brushes, the composite motion trajectory can cover burrs in all directions on the edges of irregular sheet metal parts, fully cleaning corners and complex contour edges, reducing the probability of over-grinding or under-grinding, and improving the deburring quality of the upper surface edges.

[0029] (4) This production line integrates grinding, 2D online visual inspection and automatic sorting and palletizing. After grinding, the workpieces are directly inspected and classified online. The unloading station automatically sorts the workpieces based on the inspection results, eliminating the need for offline transfer of workpieces and manual sorting by eye. This creates a closed loop of processing-inspection-sorting, improves the overall automation level of the production line, and facilitates the management of qualified and defective parts.

[0030] (5) The present invention has good workpiece adaptability and versatility, and can realize mixed-flow feeding processing of sheet metal parts of the same thickness but different shapes without frequent tooling changes; the height of the upper magnetic conveyor belt and the lower magnetic conveyor belt is adjustable, which can adapt to workpieces of different thicknesses; the matching grinding method can select the sand belt and roller brush grit according to the hardness of the sheet metal parts and adjust the grinding gap. The hardware structure and process method work together to maintain stable double-sided edge grinding quality under batch production conditions and expand the applicability of the equipment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the sheet metal double-sided edge grinding production line of the present invention.

[0032] Figure 2This is a schematic diagram of the structure of the lower surface deburring machine and the upper surface deburring machine of the present invention;

[0033] In the diagram: 1. Loading station; 2. Lower surface deburring machine; 3. Upper surface deburring machine; 4. 2D vision inspection station; 5. Unloading station; 6. Handling robot; 7. Safety light curtain; 8. Dust collector one; 9. Dust collector two; 10. Control system;

[0034] 21. Upper magnetic conveyor belt; 22. Lower sand belt one; 23. Lower sand belt two; 24. Lower sand belt three; 25. Conveyor roller;

[0035] 31. Lower magnetic conveyor belt; 32. Roller brush one; 33. Roller brush two; 34. Roller brush three; 35. Roller brush four; 36. Roller brush control motor. Detailed Implementation

[0036] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0037] Example 1

[0038] like Figure 1 , Figure 2 As shown, this embodiment provides a sheet metal double-sided edge grinding production line, including a control system 10 and a loading station 1, a lower surface deburring machine 2, an upper surface deburring machine 3, a 2D vision inspection station 4 and a unloading station 5 arranged sequentially along the workpiece conveying direction.

[0039] The loading station 1, the lower surface deburring machine 2, the upper surface deburring machine 3, the 2D vision inspection station 4, and the unloading station 5 are sequentially connected by a constant speed conveyor belt. The workpieces are continuously transferred between the stations by the constant speed conveyor belt, eliminating the need for manual transfer. The control system 10 is electrically connected to the lower surface deburring machine 2, the upper surface deburring machine 3, the 2D vision inspection station 4, and the unloading station 5. The control system 10 coordinates the timing of the actions of each station to achieve automated and coordinated operation of the entire production line.

[0040] The lower surface deburring machine 2 is equipped with an upper magnetic conveyor belt 21 and multiple sets of transversely arranged sanding belt grinding mechanisms. When the sheet metal parts enter the lower surface deburring machine 2 with the conveyor belt, the upper magnetic conveyor belt 21 generates magnetic attraction to attract and adhere the sheet metal parts to the belt surface, thereby positioning and fixing the sheet metal parts, offsetting the cutting force of the sanding belt, effectively preventing the sheet metal parts from slipping or moving during the grinding process, and avoiding the phenomenon of missed grinding or inconsistent grinding depth. The multiple sets of sanding belt grinding mechanisms operate along the direction perpendicular to the workpiece conveying, and perform deburring and blunting processing on the lower surface edges of the sheet metal parts from the lower side, completing the grinding treatment of the lower surface edges of the sheet metal parts.

[0041] The upper surface deburring machine 3 is equipped with a lower magnetic conveyor belt 31, a roller brush control motor 36, and multiple sets of roller brush assemblies. The multiple sets of roller brush assemblies are suspended above the lower magnetic conveyor belt 31. When the sheet metal parts are conveyed to the upper surface deburring machine 3, the lower magnetic conveyor belt 31 supports and limits the sheet metal parts. The roller brush control motor 36 outputs power to drive the multiple sets of roller brush assemblies to revolve as a whole. At the same time, each set of roller brush assemblies can achieve independent rotation and can switch between forward and reverse rotation according to processing needs. Through the composite motion trajectory of overall revolution, independent rotation, and forward and reverse rotation switching, the edges of the upper surface of the sheet metal parts can be swept from multiple angles, and the burrs at irregular corners can be thoroughly cleaned, reducing the risk of over-grinding or under-grinding, and completing the deburring and blunting processing of the edges of the upper surface of the sheet metal parts.

[0042] The 2D vision inspection station 4 is used to collect image data of the polished sheet metal parts, complete the detection of polishing defects and the identification and classification of workpieces; the polished sheet metal parts are transported to this station to complete online inspection, and the inspection data is transmitted to the control system 10.

[0043] The unloading station 5 can perform corresponding actions based on the detection data of the 2D vision inspection station 4 to realize the automated sorting and palletizing of sheet metal parts, thereby realizing a closed-loop operation of grinding-inspection-sorting.

[0044] In some embodiments, the loading station 1 is equipped with a conveying mechanism for carrying, storing, and conveying sheet metal parts to be ground. This conveying mechanism is compatible with sheet metal parts of different contours but the same thickness, supporting continuous processing of sheet metal parts of the same thickness but different shapes in a mixed-flow combination, eliminating the need for frequent changes in positioning fixtures and improving the production line's adaptability to various workpiece types. The conveying mechanism can be any one of a roller conveyor line, a belt conveyor line, or a chain conveyor line.

[0045] In some embodiments, such as Figure 2 As shown, the lower surface deburring machine 2 also includes a conveyor roller 25, a dust collector 8, a lower sanding belt 22, a lower sanding belt 23, and a lower sanding belt 3 24;

[0046] The conveyor roller 25 is positioned below the upper magnetic conveyor belt 21, working in conjunction with the upper magnetic conveyor belt 21 to support the sheet metal parts, share the workpiece pressure, and ensure stable conveying. The lower sanding belts 22, 23, and 34 are arranged parallel and evenly below the upper magnetic conveyor belt 21, with multiple sanding belts working together to expand the grinding coverage and improve the grinding efficiency of the lower surface edges. The lower surface deburring machine 2 is connected to the dust collector 8, and the metal dust generated during grinding is promptly removed by the dust collector 8, improving the working environment inside the station and reducing secondary pollution of equipment and workpieces by dust. The lower sanding belts 22, 23, and 34 are all detachable and replaceable, allowing for quick disassembly and replacement after wear, facilitating maintenance. The height of the upper magnetic conveyor belt 21 is adjustable, and by changing the gap between the upper magnetic conveyor belt 21 and the sanding belts, it can adapt to the grinding needs of sheet metal parts of different thicknesses. Each sanding belt is a detachable and replaceable structure. For example, both ends of the sanding belt are respectively sleeved on the outside of the roller body of the drive roller and the tension roller. The bearing seats of the drive roller and the tension roller are locked and installed on the frame with quick-release pressure blocks. By releasing the quick-release pressure blocks, the tension roller can be released to relieve the tension of the sanding belt. The worn sanding belt can be directly pulled out from the roller, and a new sanding belt can be put on and re-tensioned and locked. This realizes quick disassembly and replacement of the sanding belt without disassembling the entire grinding frame, which is convenient for maintenance and replacement of the sanding belt after wear.

[0047] In some embodiments, such as Figure 2 As shown, the upper surface deburring machine 3 also includes a dust collector 9, a roller brush 32, a roller brush 33, a roller brush 34, and a roller brush 35. The roller brushes 32, 33, 34, and 35 together form a roller brush assembly, with multiple sets of roller brushes participating in grinding simultaneously, expanding the processing range of the upper surface edges. The roller brushes 32, 33, 34, and 35 are all detachable and replaceable structures, and can be replaced individually when the roller brushes are worn or shedding bristles, reducing maintenance costs. The lower magnetic conveyor belt 31 has an adjustable height, thereby adjusting the grinding gap between the roller brush assembly and the conveyor belt to adapt to sheet metal parts of different thicknesses. The upper surface deburring machine 3 is connected to the dust collector 9 to collect the metal dust generated during grinding, preventing dust accumulation on the roller brushes and the surface of the sheet metal parts.

[0048] In some embodiments, the 2D vision inspection station 4 includes a supplementary lighting lamp, a vision camera, and a vision processing unit. The supplementary lighting lamp is used to provide a stable inspection light source, eliminate ambient light interference, and ensure image quality. The vision camera is mounted above the conveyor belt of the station and is used to acquire images of sheet metal parts and transmit them to the vision processing unit. The vision processing unit is electrically connected to the control system 10. After receiving the image signal, the vision processing unit constructs a two-dimensional data model of the workpiece based on the acquired image, completes the detection of grinding defects, workpiece position correction, and model classification, and transmits the detection data to the control system 10 to provide data basis for subsequent sorting operations.

[0049] In some embodiments, the unloading station 5 includes a handling robot 6, a workpiece gripper, and several material trays; the workpiece gripper is installed at the end of the handling robot 6, and the workpiece gripper can choose to grip or absorb the material according to the shape of the sheet metal part; the handling robot 6 is connected to the control system 10 and receives the detection result signal sent by the control system 10, and can classify, pick up, sort and stack the polished sheet metal parts according to the detection data of the 2D vision inspection station 4, and place qualified parts and defective parts in different material trays respectively.

[0050] In some embodiments, a safety light curtain 7 is provided around the unloading station 5 for operational safety protection. When personnel accidentally enter the robot's working area, the safety light curtain 7 sends a signal to the control system 10, causing the handling robot 6 to stop its operation in an emergency to avoid a safety accident. The end of the conveyor belt of the unloading station 5 is provided with a material outlet. Sheet metal parts that exceed the handling load of the handling robot 6 can be manually unloaded through the material outlet, which is compatible with the unloading of heavy workpieces.

[0051] Example 2

[0052] This embodiment discloses a method for grinding double-sided edges of sheet metal parts. This grinding method is compatible with and can be applied to the double-sided edge grinding production line of sheet metal parts described in Embodiment 1 above. Through the coordinated linkage of each station, it realizes fully automatic and continuous double-sided edge deburring and blunting of sheet metal parts, effectively solving the problems of traditional grinding processes that require manual flipping, secondary loading, poor processing consistency, and inability to produce in mixed batches. Specifically, it includes the following processing steps:

[0053] S1. Mixed-flow continuous feeding

[0054] Various sheet metal parts with the same thickness but different shapes and structures are randomly arranged and placed on the surface of the conveyor mechanism at loading station 1. They are conveyed at a uniform speed and continuously by the uniform constant speed conveyor belt of the production line. There is no need to position the sheet metal parts with different shapes separately or to produce them in batches. This enables the mixed flow and continuous loading of sheet metal parts of the same thickness and multiple types, which greatly improves the production line's production compatibility and batch processing efficiency.

[0055] S2, Lower surface limiting type grinding and deburring

[0056] The sheet metal parts to be processed are stably conveyed into the lower surface deburring machine 2 by the conveyor belt. The sheet metal parts are attracted and fixed by the uniform magnetic attraction generated by the upper magnetic conveyor belt 21. The conveyor rollers 25 arranged at the bottom work together to support and limit the movement, effectively offsetting the lateral cutting force during the sanding process and preventing problems such as offset, slippage, and warping of thin sheet metal parts. At the same time, the lower sanding belts 22, 23, and 3 24 move laterally along the direction perpendicular to the workpiece conveying. Multiple sanding belts work together to fully grind the edges of the lower surface of the sheet metal parts, thoroughly removing burrs and cutting debris from the edges, and uniformly blunting the sharp edges to ensure a smooth transition of the lower surface edges of the sheet metal parts, meeting the requirements of subsequent painting processes.

[0057] S3, Upper surface composite trajectory grinding and deburring.

[0058] The sheet metal parts with the lower surface polished are continuously conveyed to the upper surface deburring machine 3, where they are stably supported and conveyed by the lower magnetic conveyor belt 31. The roller brush control motor 36 starts and drives roller brush one 32, roller brush two 33, roller brush three 34, and roller brush four 35 to revolve around the central axis. At the same time, each group of roller brushes rotates independently around its own axis, and can flexibly switch between forward and reverse rotation according to the shape of the sheet metal parts' edges and the adhesion of burrs. Through the composite motion trajectory of revolution, rotation, and forward and reverse rotation, the irregular edges and corner blind areas on the upper surface of the sheet metal parts are polished and cleaned without dead angles, thoroughly removing residual burrs and slag on the upper surface, and completing the fine blunting operation of the upper surface edges. This effectively avoids the problems of incomplete cleaning and uneven polishing that exist in traditional single-flow roller brush polishing.

[0059] S4. Online Visualized Precise Detection and Classification

[0060] After double-sided edge grinding, the sheet metal parts are conveyed into the 2D vision inspection station 4. Under the constant light source provided by the supplementary lighting, the vision camera captures the full-area image of the sheet metal parts and transmits the image data to the vision processing unit in real time. The vision processing unit constructs a two-dimensional data model of the workpiece through a built-in two-dimensional image algorithm, automatically completes the identification of grinding defects, the quality inspection of edge blunting, the matching of workpiece models and the position correction, and feeds back the final inspection and classification data to the control system 10 in real time. This provides accurate data support for the back-end automated sorting process and realizes online closed-loop inspection of grinding quality without the need for manual offline sampling.

[0061] S5, Intelligent Sorting and Organized Material Dispensing

[0062] After receiving the detection data from the 2D vision inspection station 4, the control system 10 outputs corresponding control commands based on the workpiece's qualification status and model, driving the handling robot 6 at the unloading station 5 to move. The robot uses the end-effector to classify, grab, and stack sheet metal parts of different quality grades and models, storing them in corresponding material trays. This achieves automated sorting and classification of workpieces after polishing, without the need for manual sorting intervention throughout the process.

[0063] In some preferred embodiments, before the formal batch grinding operation, the process parameters can be matched and adjusted in advance according to the material hardness and plate thickness of the sheet metal parts to be processed: for sheet metal parts with different hardness, the corresponding grit size of the lower sanding belt and roller brush are selected to avoid the problem of incomplete grinding of hard materials and over-grinding damage to soft materials; at the same time, according to the actual thickness of the sheet metal parts, the vertical gap between the upper magnetic conveyor belt 21 and the lower sanding belt, and the vertical gap between the lower magnetic conveyor belt 31 and the roller brush assembly are precisely adjusted to ensure that the grinding gap is accurately matched with the workpiece thickness, thereby further improving the grinding accuracy and processing consistency of sheet metal parts of different specifications.

[0064] In some embodiments, the workpiece processing specifications applicable to this method are: sheet metal thickness of 1mm to 5mm and sheet metal width of 50mm to 1300mm. Within this size range, all loader sheet metal parts of the same thickness but different shapes can achieve disordered mixed flow feeding, complete double-sided edge grinding, inspection and sorting in one continuous process. The process has wide adaptability and high degree of automation, and can fully meet the industrial production needs of large-scale and multi-variety sheet metal parts.

[0065] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sheet metal part double-sided edge grinding production line, characterized in that, The system includes a control system and a loading station, a lower surface deburring machine, an upper surface deburring machine, a 2D vision inspection station, and a unloading station arranged sequentially along the workpiece conveying direction. The loading station, the lower surface deburring machine, the upper surface deburring machine, the 2D vision inspection station, and the unloading station are connected sequentially by a constant speed conveyor belt. The control system is electrically connected to the lower surface deburring machine, the upper surface deburring machine, the 2D vision inspection station, and the unloading station. The lower surface deburring machine is equipped with an upper magnetic conveyor belt and multiple sets of horizontally arranged sanding belt grinding mechanisms. The upper magnetic conveyor belt is used to adsorb and fix the sheet metal parts to prevent the workpieces from slipping during the grinding process. The multiple sets of sanding belt grinding mechanisms operate along the direction perpendicular to the workpiece conveying and are used to deburr and blunt the edges of the lower surface of the sheet metal parts. The upper surface deburring machine is equipped with a lower magnetic conveyor belt, a roller brush control motor, and multiple sets of roller brush assemblies. The multiple sets of roller brush assemblies are suspended above the lower magnetic conveyor belt. The multiple sets of roller brush assemblies can revolve as a whole under the drive of the roller brush control motor, and each set of roller brush assemblies can rotate independently and switch between forward and reverse rotation. It is used to deburr and blunt the edges of the upper surface of sheet metal parts. The 2D vision inspection station is used to collect image data of the polished sheet metal parts, and to complete the detection of polishing defects and the identification and classification of workpieces; the unloading station can realize the automated sorting and palletizing of sheet metal parts based on the detection data of the 2D vision inspection station.

2. The sheet metal double-sided edge grinding production line according to claim 1, characterized in that, The loading station is equipped with a conveying mechanism, which is used to carry, store and transport sheet metal parts to be ground, and supports mixed-flow loading and continuous processing of sheet metal parts of the same thickness but different shapes.

3. The sheet metal double-sided edge grinding production line according to claim 1, characterized in that, The lower surface deburring machine also includes a conveyor roller, a dust collector, a lower sanding belt, a lower sanding belt, and a lower sanding belt. The conveyor rollers are positioned below the upper magnetic conveyor belt to support sheet metal parts and facilitate conveying. The lower sanding belts 1, 2, and 3 are arranged parallel and evenly below the upper magnetic conveyor belt. The lower surface deburring machine is connected to the dust collector 1. The lower sanding belts 1, 2, and 3 are all detachable and replaceable. The height of the upper magnetic conveyor belt is adjustable to adjust the gap between the sanding belt and the conveyor belt, adapting to the grinding of sheet metal parts of different thicknesses.

4. The sheet metal double-sided edge grinding production line according to claim 1, characterized in that, The deburring machine for the upper surface also includes a dust collector, a roller brush, a roller brush, a roller brush, a roller brush, and a roller brush. The roller brushes 1, 2, 3, and 4 together form a roller brush assembly, and all of them are detachable and replaceable. The height of the lower magnetic conveyor belt is adjustable to adjust the grinding gap between the roller brush assembly and the conveyor belt. The upper surface deburring machine is connected to the dust collector 2 to collect the metal dust generated during grinding.

5. The sheet metal double-sided edge grinding production line according to claim 1, characterized in that, The 2D vision inspection station includes a supplementary lighting lamp, a vision camera, and a vision processing unit. The supplementary lighting lamp provides a stable light source for inspection. The vision camera is mounted above the conveyor belt at the station and is used to acquire images of sheet metal parts and transmit them to the vision processing unit. The vision processing unit is electrically connected to the control system and is configured to construct a two-dimensional data model of the workpiece based on the received images, complete the detection of grinding defects, workpiece position correction, and model classification, and transmit the inspection data to the control system.

6. The sheet metal double-sided edge grinding production line according to claim 1, characterized in that, The unloading station includes a handling robot, a workpiece gripper, and several material pallets. The workpiece gripper is installed at the end of the handling robot, which is connected to the control system. Based on the detection data from the 2D vision inspection station, the robot can classify, pick up, sort, and stack the polished sheet metal parts.

7. The sheet metal double-sided edge grinding production line according to claim 6, characterized in that, The unloading station is equipped with a safety light curtain for operational safety protection; the end of the conveyor belt at the unloading station is provided with a material outlet, and sheet metal parts exceeding the handling capacity of the handling robot can be manually unloaded through the material outlet.

8. A method for grinding the double-sided edges of sheet metal parts, characterized in that, The sheet metal double-sided edge grinding production line according to any one of claims 1 to 7 includes the following steps: S1. Mixed-flow feeding: Sheet metal parts of the same thickness but different shapes to be ground are randomly combined and placed on the conveyor mechanism of the feeding station, and continuously conveyed downstream by a constant speed conveyor belt. S2. Lower Surface Grinding: Sheet metal parts enter the lower surface deburring machine. The upper magnetic conveyor belt adsorbs and fixes the sheet metal parts. The conveyor roller supports and conveys them. The lower sanding belts 1, 2, and 3 move laterally to remove burrs and slag from the lower surface of the sheet metal parts and to blunt the edges. S3. Upper surface grinding: The sheet metal parts enter the upper surface deburring machine. The roller brush control motor drives roller brush one, roller brush two, roller brush three and roller brush four to revolve as a whole. At the same time, each roller brush rotates independently and can switch between forward and reverse directions to remove burrs and slag from the upper surface of the sheet metal parts and complete the blunting of the upper surface edges. S4. Visual Inspection: The polished sheet metal parts enter the 2D visual inspection station, where workpiece images are captured and defect detection and workpiece classification are completed. The inspection data is transmitted to the control system in real time. S5. Sorting and unloading: The control system controls the handling robot to classify, grab, and stack sheet metal parts according to the detection data.

9. The method for grinding double-sided edges of sheet metal parts according to claim 8, characterized in that, Before the formal grinding operation, select the appropriate grit size of the lower sanding belt and roller brush according to the hardness of the sheet metal parts to be processed; adjust the gap between the upper magnetic conveyor belt and the lower sanding belt, and the gap between the lower magnetic conveyor belt and the roller brush according to the thickness of the sheet metal parts to be processed.

10. The method for grinding the double-sided edges of sheet metal parts according to claim 8, characterized in that, The sheet metal parts to be ground have a thickness of 1mm to 5mm and a width of 50mm to 1300mm. Sheet metal parts of the same thickness that meet the size range can be fed in a random mixed flow, and the double-sided edge grinding process can be completed in a single feeding.

Images