An automatic concrete slab edge trimming and polishing device and polishing method

Abstract

The application discloses a kind of concrete large plate automatic edge trimming and polishing device and polishing method, it is related to building construction technical field, including travelling car, travelling car side symmetry is equipped with mounting bracket, and mounting bracket bottom is provided with travelling guide component, and truss is rotatably connected between mounting bracket, and truss bottom is connected with connecting frame, and connecting frame below is provided with mounting bracket, and there is polishing wheel on mounting bracket, and polishing wheel is driven by truss to reciprocating swing polishing, and depth adjusting piece is arranged between truss and connecting frame, and pre-tightening piece for providing pressure is arranged between connecting frame and mounting bracket, and dust hood is rotatably arranged between mounting bracket top, and self-following dynamic adjustment component is arranged between truss, connecting frame and dust hood.The concrete large plate automatic edge trimming and polishing device and polishing method, stable walking when operation, polishing wheel reciprocating swing carries out arc chamfering processing, dust hood is based on swing dust collection, and dynamic adjustment component is self-adapting adjustment dust collection range with polishing depth change.

Description

Technical Field

[0001] The invention relates to the field of building construction technology, specifically to an automated edge trimming and grinding device and grinding method for large concrete slabs. Background Technology

[0002] In the on-site construction or in-plant post-processing of large concrete slabs, after demolding and initial curing, multiple post-processing steps are usually required, including finishing, cutting, marking, and edge chamfering. Among these, edge chamfering involves rounding the sharp right angles of the slab edges to aid in sealing the joints during subsequent assembly and improve the tightness of the joints. Currently, the chamfering process is generally carried out manually by repeatedly grinding along the slab edges with a hand-held angle grinder or grinding wheel. This manual operation is highly dependent on the worker's experience, making it difficult to standardize the chamfering radius, depth, and edge straightness. The chamfering effect varies significantly between different edges of the same slab and between different batches of slabs, which is not conducive to the standardization of subsequent assembly. The edge length of large slabs can reach several meters to more than ten meters, requiring workers to work in a bent or squatting position for long periods of time, repeatedly walking while holding tools. This results in high physical exertion and is prone to localized missed grinding or over-grinding due to fatigue. The operation also generates a large amount of silica dust, creating a harsh working environment at the construction site.

[0003] To address the aforementioned issues, existing technology (Chinese Patent No. CN208514235U, published on February 19, 2019) discloses a concrete subgrade edge grinding device for road construction. By combining a track, rollers, and a motor, the grinding device can move along a straight line, resulting in a relatively smooth ground subgrade edge. This method is labor-saving and improves work efficiency. Furthermore, the lifting device, motor, and grinding wheel allow for adjustment of the grinding height to accommodate different subgrade thicknesses, making the grinding device relatively flexible.

[0004] The prior art (Chinese Patent No. CN114310532B, published on 2022-05-20) discloses a surface grinding device for precast concrete slabs. The actuator, while functioning to change the position of the grinding section, primarily plays the role of limiting the distance the grinding section moves in a single pass. This prevents the grinding of the nth and n+th grinding points from overlapping, which would result in uneven grinding on the surface of the precast concrete slab. The multi-directional arrangement of the dust collection plate expands the dust collection range, reduces blind spots, and ensures that the dust generated during grinding is removed by the vacuum cleaner in a timely manner, reducing the probability of dust scattering into the working environment. The cover, upon contact with the precast concrete slab, forms a closed space, effectively enclosing the dust and facilitating timely dust removal by the vacuum cleaner, further reducing the chance of dust scattering.

[0005] The above solution also has the following problems during use: the edge trimming and grinding device has insufficient walking stability during operation, and the grinding wheel can only contact the edge of the board in a fixed posture, which makes the resistance in the direction of travel large, resulting in low efficiency of chamfering and edge trimming. In addition, when grinding different chamfer depths, the amount of dust generated by the grinding operation will increase, and the angle and diffusion range of dust splash will change accordingly. The fixed mode or single active dust collection component is not enough to make timely self-following dynamic adjustments, making it difficult to maintain the optimal dust collection effect at different cutting depths. Summary of the Invention

[0006] The purpose of this invention is to provide an automated edge trimming and grinding device and method for large concrete slabs, in order to solve the problems mentioned in the background art. Existing automated edge trimming and grinding devices for large concrete slabs lack stability during operation, and the grinding wheel can only contact the edge of the slab in a fixed posture, resulting in greater resistance in the direction of travel, leading to low efficiency in chamfering and edge trimming. Furthermore, the amount of dust generated during grinding increases when grinding different chamfer depths, and the angle and diffusion range of dust splashing change accordingly. Fixed-mode or single-moving dust collection components are insufficient to make timely self-following dynamic adjustments, making it difficult to maintain the optimal dust collection effect at different cutting depths.

[0007] To achieve the above objectives, the invention provides the following technical solution:

[0008] An automated edge trimming and grinding device for large concrete slabs includes a traveling vehicle, on which mounting frames are symmetrically mounted on the sides and at the bottom of the mounting frames are traveling guide components. A truss is rotatably connected between the middle parts of the mounting frames, and a connecting frame is connected to the bottom of the truss. A placement frame is provided below the connecting frame, and a grinding wheel is mounted on the placement frame.

[0009] The grinding wheel is driven by the truss to reciprocate and grind, and a motor that drives the truss is installed on the outside of the mounting frame. A depth adjustment component is provided between the truss and the connecting frame, and a pre-tightening component that provides pressure is provided between the connecting frame and the mounting frame. A dust collection hood is rotatably installed on the top of the mounting frame, and a self-following dynamic adjustment component is provided between the truss, the connecting frame and the dust collection hood.

[0010] Furthermore, the walking guide component includes a guide wheel assembly that is connected through to the bottom of the mounting frame. The rollers of the guide wheel assembly abut against the side of the concrete slab, and a locking bolt is threaded through to the outer bottom of the mounting frame. The end of the locking bolt is pressed and fixed to the guide wheel assembly.

[0011] Furthermore, both the mounting bracket and the guide wheel assembly are configured with an "L" shape, and the grinding device as a whole maintains its walking stability through the guide wheel assembly, so that the grinding device maintains a constant distance from the edge of the concrete slab.

[0012] Furthermore, the depth adjustment component is an adjustment screw that is threaded through and connected to the middle of the truss. A connecting frame is threaded to the outer side of the adjustment screw. The truss and the connecting frame are sleeved together, and the connection part is a rectangular structure.

[0013] Furthermore, both the truss and the connecting frame are configured as "T"-shaped structures, and the truss and the connecting frame are vertically distributed.

[0014] Furthermore, the pre-tightening component includes pre-tightening springs symmetrically connected between the connecting frame and the mounting frame, and the mounting frame is configured as a "U"-shaped structure, the working surface of the grinding wheel is an arc-shaped concave surface, and the pre-tightening spring has built-in damping.

[0015] Furthermore, the dust hood is configured as a flexible fan-shaped structure, the output end of the truss motor is connected to the half gear through a sprocket mechanism, the half gear is rotatably connected to the top side of the mounting frame, and the outer side of the half gear is meshed with the full gear, the full gear is fixed to the outside of the rotating shaft of the dust hood, and a torsion spring is installed between the rotating shaft of the dust hood and the mounting frame. The dust hood forms a swinging dust suction structure through the half gear, the full gear and the torsion spring.

[0016] Furthermore, the dynamic adjustment component includes a sleeve installed on the top of the connecting frame, and a piston rod is connected through the top of the sleeve. The outer side of the piston rod is fixed to the bottom of the truss. The sleeve is connected to the fixing cavity in the bottom side groove on both sides of the dust hood through a connecting pipe. The two ends of the fixing cavity are slidably connected through a sealing connection with an extension plate. The outer end of the extension plate is fixedly connected to the front and rear sides of the dust hood.

[0017] Furthermore, oil flows between the sleeve and the fixed cavity, and both the fixed cavity and the extension plate are designed with an arc-shaped structure. The deeper the grinding wheel grinds, the larger the dust collection range of the dust collection hood. The dust collection hood is connected to an industrial vacuum cleaner, and the industrial vacuum cleaner is installed on the top of the vehicle.

[0018] An automated method for trimming and grinding large concrete slabs includes the following steps:

[0019] Step 1: Place the device at the starting end of the edge of the concrete slab to be processed, with the guide wheel assembly in contact with the edge of the slab. Then, according to the chamfer radius required by the design drawings, the depth adjustment component presets the feed amount of the grinding wheel by adjusting the screw.

[0020] The steps involve starting the walking vehicle, grinding wheel, and truss drive motor. The worker controls the device via the operation panel to walk at a constant speed along the edge of the board. During the walking process, the walking guide component always abuts against the side of the board to ensure that the walking trajectory is parallel to the edge of the board. The pre-tensioning spring of the pre-tensioning component applies a constant thrust to the grinding wheel, so that the grinding wheel cuts and grinds the right angle of the board edge with the preset maximum feed amount, forming a continuous and uniform arc chamfer in one go.

[0021] Step 1: While the polishing is in progress, start the industrial vacuum cleaner. The self-following dynamic adjustment component drives the dust hood to adjust the suction range by swinging and suctioning, collecting the dust generated during polishing and preventing the dust from spreading.

[0022] After completing the trimming and sanding of a single edge, the moving trolley travels to the end of the board and stops. The device is then moved to the adjacent edge, and the above steps are repeated until all edges are trimmed and sanded.

[0023] Compared with existing technologies, the beneficial effects of the invention are:

[0024] This automated edge trimming and grinding device and method for large concrete slabs utilizes the reciprocating swing of the truss to drive the grinding wheel in dynamic cutting, effectively reducing travel resistance and improving chamfering quality and efficiency. Simultaneously, it achieves independent control of feed rate and pressure through adjusting screws and pre-tensioning springs. Furthermore, it innovatively employs the relative displacement between the connecting frame and the truss to drive a hydraulic dynamic adjustment component, allowing the dust collection hood's suction range to adapt in real-time to changes in grinding depth. This forms an automated closed-loop system that links travel, grinding, and dust collection depth, comprehensively solving the problems of unstable travel, high grinding resistance, and poor dust collection adaptability in existing technologies.

[0025] 1. Furthermore, by utilizing the change in oil volume generated by the sleeve and piston rod when the connecting frame is displaced relative to the truss, the extension plates in the fixed cavities on both sides of the dust collection hood are driven to extend and retract, so that the unfolded area of ​​the dust collection hood, i.e. the dust collection range, automatically adapts to the change in grinding depth. When the grinding is deeper and the dust generation is greater, the dust collection range expands synchronously; when the grinding is shallower, the dust collection range shrinks accordingly. This fully automatic self-following adjustment mechanism, combined with the oscillating dust collection action of the dust collection hood itself, can maintain the optimal dust collection effect at different cutting depths, effectively suppress the diffusion of silicon-containing dust, and improve the working environment.

[0026] 2. Furthermore, by abutting the guide wheel assembly against the side edge of the board and securing it with locking bolts, the traveling vehicle maintains a constant distance from the board edge during its movement, and its travel trajectory is strictly parallel to the board edge. This effectively avoids problems such as inconsistent chamfer width and edge bending caused by positioning deviations during manual grinding, significantly improving the straightness and dimensional consistency of the large board edge trimming, which is conducive to subsequent assembly standardization.

[0027] 3. Furthermore, the grinding wheel is driven by the truss to perform reciprocating oscillation grinding, rather than cutting into the right angle of the board edge in a fixed posture. This dynamic cutting method allows the grinding wheel to trim the edge along an arc trajectory, which greatly reduces the cutting resistance in the direction of travel. At the same time, the continuous oscillation makes the chamfer arc transition smoother and more uniform, forming a continuous arc chamfer in one go. This avoids local over-grinding or under-grinding caused by fixed posture grinding, and significantly improves the trimming efficiency and surface quality.

[0028] 4. Furthermore, the maximum cutting feed of the grinding wheel can be preset by adjusting the screw to meet the chamfering requirements of different design radii. At the same time, the preload spring between the connecting frame and the mounting frame has built-in damping, which can continuously apply a constant thrust to the grinding wheel to ensure that the grinding wheel always cuts stably with the preset maximum feed. The two are independent of each other and do not interfere with each other, which not only ensures the processing flexibility under different working conditions, but also avoids uneven chamfering depth caused by the fluctuation of cutting force. Attached Figure Description

[0029] Figure 1 A schematic diagram of the overall front view of the invention;

[0030] Figure 2 A schematic diagram of the overall side view structure of the invention;

[0031] Figure 3 A side view of the connection structure of the invention's traveling vehicle, mounting frame, and guide wheel assembly;

[0032] Figure 4 A bottom view schematic diagram of the distribution of the mounting bracket, connecting bracket, placement bracket and grinding wheel for the invention;

[0033] Figure 5 A top view schematic diagram of the mounting bracket and dust hood distribution for the invention;

[0034] Figure 6 A cross-sectional structural diagram of the connection between the mounting bracket and the guide wheel assembly;

[0035] Figure 7 A schematic diagram of the connection structure between the dust hood, half gear, full gear, and torsion spring for the invention;

[0036] Figure 8 A schematic diagram of the connection structure between the connecting frame, the mounting frame, and the grinding wheel;

[0037] Figure 9 A cross-sectional structural diagram of the connecting frame and mounting frame, as well as the connection between the sleeve and the piston rod;

[0038] Figure 10 This is a cross-sectional structural diagram of the sleeve, piston rod, fixed cavity, and extension plate for the invention.

[0039] In the diagram: 1. Walking vehicle; 2. Mounting frame; 3. Guide wheel assembly; 4. Locking bolt; 5. Truss; 6. Connecting frame; 7. Mounting frame; 8. Grinding wheel; 9. Preload spring; 10. Adjusting screw; 11. Dust hood; 12. Half gear; 13. Full gear; 14. Torsion spring; 15. Sleeve; 16. Piston rod; 17. Side groove; 18. Fixing cavity; 19. Extension plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0041] Example 1: Please refer to Figure 1 - Figure 10 The invention provides an automated edge trimming and grinding device for large concrete slabs, including a traveling vehicle 1. Mounting frames 2 are symmetrically mounted on the sides of the traveling vehicle 1, and a traveling guide component is provided at the bottom of the mounting frames 2. A truss 5 is rotatably connected between the middle sections of the mounting frames 2. A connecting frame 6 is connected to the bottom of the truss 5. A placement frame 7 is provided below the connecting frame 6, and a grinding wheel 8 is mounted on the placement frame 7. The grinding wheel 8 is driven by the truss 5 to reciprocate and grind. A motor driving the truss 5 is mounted on the outer side of the mounting frames 2. A depth adjustment component is provided between the truss 5 and the connecting frame 6, and a pre-tightening component providing pressure is provided between the connecting frame 6 and the placement frame 7. A dust suction hood 11 is rotatably mounted on the top of the mounting frames 2, and a self-following dynamic adjustment component is provided between the truss 5, the connecting frame 6, and the dust suction hood 11.

[0042] The working principle of this automated edge trimming and grinding device for large concrete slabs can be summarized as follows: Using a traveling vehicle 1 as the carrier, the stability and parallelism of the movement along the slab edge are ensured by the traveling guide component at the bottom of the mounting frame 2. Dynamic cutting is performed by the reciprocating oscillation of the grinding wheel 8 driven by the truss 5, effectively reducing travel resistance and efficiently and uniformly rounding the right angles of the slab edge. Simultaneously, the grinding depth is preset by the adjusting screw 10, and the grinding pressure is constantly provided by the pre-tension spring 9. Independent control of the feed rate and pressure is achieved through the adjusting screw 10 and the pre-tension spring 9. The dust suction hood 11, based on its oscillating dust suction, utilizes the relative displacement between the connecting frame 6 and the truss 5 to drive the hydraulic dynamic adjustment component, allowing the dust suction range of the dust suction hood 11 to adapt in real time to changes in the grinding depth. By adaptively adjusting the dust suction range according to the grinding depth through the dynamic adjustment component, automated collaborative operation of traveling, grinding, and dust suction is achieved.

[0043] Specifically, the walking guide component includes a guide wheel assembly 3 that runs through the bottom of the mounting frame 2. The rollers of the guide wheel assembly 3 abut against the side of the concrete slab, and a locking bolt 4 is threaded through the bottom outer side of the mounting frame 2. The end of the locking bolt 4 is pressed and fixed to the guide wheel assembly 3. Both the mounting frame 2 and the guide wheel assembly 3 are set as "L" shaped structures, and the grinding device as a whole maintains the stability of walking through the guide wheel assembly 3, so that the grinding device maintains a constant distance from the edge of the concrete slab.

[0044] refer to Figure 1 - Figure 6 As shown, during operation, the entire device is placed at the starting end of the edge of the concrete slab. The guide wheel assembly 3 at the bottom of the mounting frame 2 on both sides has its rollers abutting against the side edge of the slab. After the traveling vehicle 1 starts, the guide wheel assembly 3 rolls along the edge of the slab. Because the locking bolt 4 presses and fixes the guide wheel assembly 3 to the mounting frame 2, it can ensure that the traveling trajectory of the traveling vehicle 1 is always parallel to the edge of the slab and that the grinding device maintains a constant distance from the edge of the slab, ensuring the straightness and dimensional consistency of the chamfer.

[0045] Specifically, the depth adjustment component is an adjusting screw 10 that is threaded through and connected to the middle of the truss 5. The adjusting screw 10 is threaded to the outer side of the connecting frame 6. The truss 5 and the connecting frame 6 are connected by a sleeve, and the connection part is a rectangular structure. Both the truss 5 and the connecting frame 6 are set as "T" shaped structures, and the truss 5 and the connecting frame 6 are vertically distributed.

[0046] refer to Figure 3 , Figure 5 - Figure 6 and Figure 8 - Figure 9 As shown, since the truss 5 and the connecting frame 6 are connected by a rectangular sleeve, and the top of the connecting frame 6 is threaded with an adjusting screw 10, which is threaded to the middle of the truss 5, rotating the adjusting screw 10 can change the extension of the connecting frame 6 relative to the truss 5, that is, the maximum cutting feed of the preset grinding wheel 8, i.e., the chamfer depth. At the same time, since the truss 5 drives the grinding wheel 8 to swing laterally in the direction of travel, the grinding wheel 8 does not cut in with a fixed posture, but trims the edge with a dynamic arc trajectory, which significantly reduces the resistance in the direction of travel, and forms a continuous and uniform arc chamfer in one go.

[0047] Specifically, the pre-tightening component includes a pre-tightening spring 9 symmetrically connected between the connecting frame 6 and the mounting frame 7, and the mounting frame 7 is set as a "U" shaped structure, the working surface of the grinding wheel 8 is an arc-shaped concave surface, and the pre-tightening spring 9 has built-in damping.

[0048] refer to Figure 3 and Figure 6 - Figure 9 As shown, during the grinding process, the pre-tension spring 9 between the connecting frame 6 and the mounting frame 7 has built-in damping, which continuously applies a constant thrust to the grinding wheel 8, so that it cuts the right angle of the plate edge with a preset maximum feed.

[0049] Specifically, the dust hood 11 is configured as a flexible fan-shaped structure. The motor output end of the truss 5 is connected to the half gear 12 through a sprocket mechanism. The half gear 12 is rotatably connected to the top side of the mounting frame 2, and the outer side of the half gear 12 is meshed with the full gear 13. The full gear 13 is fixed to the outside of the rotating shaft of the dust hood 11. A torsion spring 14 is installed between the rotating shaft of the dust hood 11 and the mounting frame 2. The dust hood 11 forms a swinging dust suction structure through the half gear 12, the full gear 13 and the torsion spring 14.

[0050] refer to Figure 3 - Figure 9 As shown, the drive motor of the truss 5 drives the half gear 12 to rotate through the sprocket mechanism. The half gear 12 periodically meshes with the full gear 13, causing the dust collection hood 11 to swing. At the same time, a torsion spring 14 is installed at the rotating shaft. When the half gear 12 disengages, the torsion spring 14 resets the dust collection hood 11, thus forming a continuous swinging dust collection action, expanding the dust collection coverage angle and reducing dust dispersion. At the same time, the motor drives the truss 5 to swing back and forth around the rotating shaft in the middle of the mounting frame 2, which in turn drives the grinding wheel 8 to swing back and forth for grinding, reducing the grinding travel resistance and improving processing efficiency.

[0051] Specifically, the dynamic adjustment component includes a sleeve 15 installed on the top of the connecting frame 6, and a piston rod 16 is connected through the top of the sleeve 15. The outer side of the piston rod 16 is fixed to the bottom of the truss 5. The sleeve 15 is connected to the fixed cavity 18 in the bottom side groove 17 on both sides of the dust collection hood 11 through the connecting pipe. The two ends of the fixed cavity 18 are sealed and slidably connected to the extension plate 19. The outer end of the extension plate 19 is fixedly connected to the front and rear sides of the dust collection hood 11. Oil flows between the sleeve 15 and the fixed cavity 18. Both the fixed cavity 18 and the extension plate 19 are set as arc-shaped structures. The deeper the grinding wheel 8 grinds, the larger the dust collection range of the dust collection hood 11. The dust collection hood 11 is connected to the industrial vacuum cleaner, and the industrial vacuum cleaner is installed on the top of the walking vehicle 1.

[0052] refer to Figure 8 - Figure 10As shown, when the adjusting screw 10 changes the extension of the connecting frame 6, i.e., the grinding depth increases, the connecting frame 6 moves downward relative to the truss 5, and the sleeve 15 slides relative to the piston rod 16. The internal volume of the sleeve 15 changes, forcing the internal oil to flow through the connecting pipe into the fixed cavity 18 in the bottom side grooves 17 on both sides of the dust collection hood 11. The fixed cavity 18 has an arc-shaped structure, and its two ends are sealed and slidably connected with arc-shaped extension plates 19. The outer ends of the extension plates 19 are fixedly connected to the front and rear sides of the dust collection hood 11, and the oil enters the fixed cavity. After step 18, the extension plate 19 is pushed outward, thereby increasing the unfolded area and dust collection range of the dust hood 11. Conversely, when the grinding depth decreases, the oil in the sleeve 15 flows back, and the extension plate 19 retracts under negative pressure or reset action, and the dust collection range shrinks accordingly. Thus, the dust collection range of the dust hood 11 is always matched with the current grinding depth, which can effectively collect dust whose splash angle and diffusion range change with the cutting amount. It can also work with the industrial vacuum cleaner installed on the top of the vehicle 1 to achieve efficient dust collection.

[0053] Example 2:

[0054] Based on Example 1, an automated edge trimming and grinding method for large concrete slabs is also disclosed, comprising the following steps:

[0055] Step 1: Place the device at the starting end of the edge of the concrete slab to be processed, with the guide wheel assembly 3 in contact with the edge of the slab. Then, according to the chamfer radius required by the design drawings, the depth adjustment component presets the feed amount of the grinding wheel 8 by adjusting the screw 10.

[0056] Step 2: Start the drive motors of the traveling carriage 1, the grinding wheel 8 and the truss 5. The worker controls the device on the operation panel to walk at a constant speed along the edge of the board. During the walking process, the walking guide component always abuts against the side of the board to ensure that the walking trajectory is parallel to the edge of the board. The pre-tensioning spring 9 of the pre-tensioning component applies a constant thrust to the grinding wheel 8, so that the grinding wheel 8 cuts and grinds the right angle of the board edge with the preset maximum feed amount, forming a continuous and uniform arc chamfer in one go.

[0057] Step 3: While the grinding is in progress, start the industrial vacuum cleaner. The self-following dynamic adjustment component drives the dust hood 11 to adjust the dust collection range by swinging and collecting the dust generated during grinding, thus preventing the dust from spreading.

[0058] Step 4: After completing the trimming and sanding of a single edge, move the mobile carriage 1 to the end of the board and stop. Transfer the device to the adjacent edge and repeat the above steps until all edges are trimmed and sanded.

[0059] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0060] Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. An automated edge trimming and grinding device for large concrete slabs, comprising a traveling vehicle (1), wherein mounting frames (2) are symmetrically mounted on the side of the traveling vehicle (1), and a traveling guide component is provided at the bottom of the mounting frames (2), a truss (5) is rotatably connected between the middle parts of the mounting frames (2), a connecting frame (6) is connected to the bottom of the truss (5), and a placement frame (7) is provided below the connecting frame (6), and a grinding wheel (8) is mounted on the placement frame (7), characterized in that: The grinding wheel (8) is driven by the truss (5) to reciprocate and grind. A motor that drives the truss (5) is installed on the outside of the mounting frame (2). A depth adjustment component is provided between the truss (5) and the connecting frame (6). A pre-tightening component that provides pressure is provided between the connecting frame (6) and the mounting frame (7). A dust suction hood (11) is rotatably provided on the top of the mounting frame (2). A self-following dynamic adjustment component is provided between the truss (5), the connecting frame (6) and the dust suction hood (11).

2. The automated edge trimming and grinding device for large concrete slabs according to claim 1, characterized in that: The walking guide component includes a guide wheel assembly (3) that is connected through the bottom of the mounting frame (2). The rollers of the guide wheel assembly (3) abut against the side of the concrete slab, and a locking bolt (4) is threaded through the bottom outer side of the mounting frame (2). The end of the locking bolt (4) is pressed and fixed to the guide wheel assembly (3).

3. The automated edge trimming and grinding device for large concrete slabs according to claim 2, characterized in that: The mounting bracket (2) and the guide wheel assembly (3) are both set to an "L" shape, and the grinding device as a whole maintains the stability of walking through the guide wheel assembly (3), so that the grinding device maintains a constant distance from the edge of the concrete slab.

4. The automated edge trimming and grinding device for large concrete slabs according to claim 1, characterized in that: The depth adjustment component is an adjustment screw (10) that is threaded through and connected to the middle of the truss (5). The outer side of the adjustment screw (10) is threaded with a connecting frame (6). The truss (5) and the connecting frame (6) are sleeved together, and the connection part is a rectangular structure.

5. The automated edge trimming and grinding device for large concrete slabs according to claim 4, characterized in that: The truss (5) and the connecting frame (6) are both set as "T" shaped structures, and the truss (5) and the connecting frame (6) are vertically distributed.

6. The automated edge trimming and grinding device for large concrete slabs according to claim 1, characterized in that: The pre-tightening component includes a pre-tightening spring (9) symmetrically connected between the connecting frame (6) and the mounting frame (7), and the mounting frame (7) is configured as a "U" shaped structure. The working surface of the grinding wheel (8) is an arc-shaped concave surface, and the pre-tightening spring (9) has built-in damping.

7. The automated edge trimming and grinding device for large concrete slabs according to claim 1, characterized in that: The dust hood (11) is configured as a flexible fan-shaped structure. The motor output end of the truss (5) is connected to the half gear (12) through a sprocket mechanism. The half gear (12) is rotatably connected to the top side of the mounting frame (2), and the outer side of the half gear (12) is meshed with the full gear (13). The full gear (13) is fixed to the outside of the rotating shaft of the dust hood (11). A torsion spring (14) is installed between the rotating shaft of the dust hood (11) and the mounting frame (2). The dust hood (11) forms a swinging dust suction structure through the half gear (12), the full gear (13) and the torsion spring (14).

8. The automated edge trimming and grinding device for large concrete slabs according to claim 1, characterized in that: The dynamic adjustment assembly includes a sleeve (15) installed on the top of the connecting frame (6), and a piston rod (16) is connected through the top of the sleeve (15). The outer side of the piston rod (16) is fixed to the bottom of the truss (5). The sleeve (15) is connected to the fixing cavity (18) in the bottom side groove (17) on both sides of the dust hood (11) through the connecting pipe. The two ends of the fixing cavity (18) are sealed and slidably connected with the extension plate (19). The outer end of the extension plate (19) is fixedly connected to the front and rear sides of the dust hood (11).

9. The automated edge trimming and grinding device for large concrete slabs according to claim 8, characterized in that: Oil flows between the sleeve (15) and the fixed cavity (18), and both the fixed cavity (18) and the extension plate (19) are set as arc-shaped structures. The deeper the grinding wheel (8) grinds, the larger the dust suction range of the dust suction hood (11). The dust suction hood (11) is connected to the industrial vacuum cleaner, and the industrial vacuum cleaner is installed on the top of the walking vehicle (1).

10. An automated edge trimming and grinding method for large concrete slabs, applied to the automated edge trimming and grinding device for large concrete slabs as described in any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Place the device at the starting end of the edge of the concrete slab to be processed, with the guide wheel assembly (3) in contact with the edge of the slab. Then, according to the chamfer radius required by the design drawings, the depth adjustment component presets the feed amount of the grinding wheel (8) through the adjusting screw (10). Step 2: Start the drive motors of the walking car (1), the grinding wheel (8) and the truss (5). The worker walks at a constant speed along the edge of the board through the control device on the operation panel. During the walking process, the walking guide component always abuts against the side of the board to ensure that the walking trajectory is parallel to the edge of the board. The pre-tension spring (9) of the pre-tensioning component applies a constant thrust to the grinding wheel (8) so that the grinding wheel (8) cuts and grinds the right angle of the board edge with the preset maximum feed amount, forming a continuous and uniform arc chamfer in one go. Step 3: While the grinding is in progress, start the industrial vacuum cleaner. The self-following dynamic adjustment component drives the dust hood (11) to adjust the dust collection range based on the swinging dust collection, collect the dust generated by the grinding, and avoid the dust from spreading. Step 4: After completing the trimming and sanding of a single edge, move the traveling vehicle (1) to the end of the board and stop. Transfer the device to the adjacent edge and repeat the above steps until all edges are trimmed and sanded.

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