Sheet metal part cut polishing device

Abstract

The present application relates to sheet metal part processing technical field, disclose a kind of sheet metal part cutout polishing device, including base and sanding disc, the bottom of connecting plate is provided with top disc, the top of fixed column is rotatably connected with bottom disc, the side of threaded seat is hingedly connected with equipment box, sanding disc is rotatably connected in the outside of protective cover, the inside of equipment box is provided with second motor, one end of second motor is fixedly connected with shaft, one end of shaft is fixedly connected with one side of sanding disc;By placing sheet metal part on bottom disc, start hydraulic cylinder to make top disc down, with bottom disc together clamping fixed sheet metal part, then, first motor drives sanding disc to move to contact with cutout, while second motor drives sanding disc high-speed rotation polishing;Subsequently, third motor drives bottom disc and sheet metal part slowly rotate by connecting shaft, PCL program controls first motor to adjust sanding disc synchronous movement, realize annular cutout evenly polishing around.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing technology, specifically to a sheet metal cutting edge grinding device. Background Technology

[0002] In the field of sheet metal processing, after sheet metal parts undergo processes such as laser cutting, stamping, and shearing, defects such as burrs, flash, and sharp angles often appear at the cut edges. These defects not only affect the appearance quality of the sheet metal parts but also cause numerous problems during subsequent assembly, transportation, and use. For example, sharp burrs may cut the operator's hands, cause wear on adjacent components during assembly, and even affect the overall performance and lifespan of the product. Statistics show that assembly failures caused by improper cutting of sheet metal parts account for more than 30% of all quality problems in sheet metal parts, while also increasing the cost of later maintenance. Therefore, precise and efficient grinding of sheet metal parts is an indispensable and crucial step in the sheet metal processing process.

[0003] When grinding arc or ring-shaped cuts using traditional equipment, manual rotation of the workpiece or adjustment of the grinding head position is often required. This method has many drawbacks in practical applications. First, manual grinding is inefficient. Operators need to use tools such as sandpaper and angle grinders to process the cuts one by one. Grinding a cut of an ordinary sheet metal part often takes several minutes or even longer, which is difficult to meet the needs of modern large-scale production and results in low production efficiency.

[0004] To address the aforementioned issues, there is an urgent need for innovative designs based on existing sheet metal cutting and grinding devices. Summary of the Invention

[0005] To address the problem of low efficiency in existing manual grinding techniques, this invention provides a sheet metal cutting edge grinding device.

[0006] This invention is achieved using the following technical solution: a sheet metal cutting and grinding device, comprising a base and a grinding disc, a support column fixedly connected to one top end of the base, a crossbeam fixedly connected to the top of the support column, a hydraulic cylinder provided at one top end of the crossbeam, a connecting plate fixedly connected to the bottom piston rod of the hydraulic cylinder through the interior of the crossbeam, a top plate provided at the bottom of the connecting plate, a fixing column fixedly connected to the top of the base, a chassis rotatably connected to the top of the fixing column, the top plate being located directly above the chassis, a column fixedly connected to one side of the base, and a high-definition camera fixedly connected to the top of the column;

[0007] The base has a first motor at one end, a threaded rod at one end, a threaded seat at one end of the threaded rod, a device housing at one side of the threaded seat, a protective cover at one end of the device housing, a grinding disc rotatably connected to the outside of the protective cover, a second motor inside the device housing, a rotating shaft at one end of the second motor, a rotating shaft at one end fixedly connected to one side of the grinding disc, an electric push rod at one side of the top of the threaded seat, and an electric push rod at one end hinged to the inside of the protective cover.

[0008] Preferably, a first hinge seat is fixedly connected to one side of the threaded seat, one end of the electric push rod is hingedly connected to the first hinge seat, a second hinge seat is fixedly connected to one side of the protective cover, and the other end of the electric push rod is hingedly connected to the second hinge seat.

[0009] Preferably, a third hinge seat is fixedly connected to one side of the threaded seat, and one end of the equipment box is hingedly connected to the inside of the third hinge seat.

[0010] Preferably, a first connecting rod is hinged to one side of the threaded seat, a second connecting rod is rotatably connected to one end of the first connecting rod, and one end of the second connecting rod is hinged to the inside of the protective cover.

[0011] Preferably, the top of the connecting plate is fixedly connected to two guide rods, the guide rods are movably connected to the inside of the crossbeam, and the top of the guide rods is fixedly connected to a limiting ring, the limiting ring being located at the top of the crossbeam.

[0012] Preferably, a third motor is installed inside the fixed column, and a connecting shaft is fixedly connected to the top of the third motor. The top of the connecting shaft is fixedly connected to the bottom of the chassis.

[0013] Preferably, a bearing is fixedly connected to the top of the top plate, and the bearing is embedded in the bottom of the connecting plate.

[0014] Preferably, the top of the base is fixedly connected to two fixed seats, and the two ends of the threaded rod are rotatably connected inside the two fixed seats.

[0015] Preferably, two limiting rods are fixedly connected between the two fixed seats, and two limiting blocks are fixedly connected to the bottom of the threaded seat, with the limiting blocks movably connected to the outside of the limiting rods.

[0016] Preferably, the bottom of the threaded seat is fixedly connected to a top plate, the top plate is movably connected to the top of the fixed seat, and two side plates are fixedly connected to both sides of the top plate, the side plates being movably connected to both sides of the fixed seat.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In use, when grinding the arc-shaped cut of a sheet metal part, the part is first placed on the chassis. The hydraulic cylinder is activated to lower the top plate, which, together with the chassis, clamps and fixes the sheet metal part to prevent vibration and displacement. Next, a high-definition camera captures images and positions the relative coordinates of the cut and the grinding disc. Controlled by the PCL program, the first motor drives the grinding disc to move until it contacts the cut, while the second motor drives the grinding disc to rotate at high speed for grinding. Subsequently, the third motor drives the chassis and the sheet metal part to rotate slowly through the connecting shaft. The camera continuously monitors and provides feedback on deviations, and the PCL program controls the first motor to adjust the synchronous movement of the grinding disc, achieving uniform grinding of the entire circumference of the annular cut.

[0019] In use, by activating the electric push rod, the top of the protective cover is moved, causing one end of the protective cover to rotate the equipment box. The other end of the equipment box rotates around the inside of the third hinge seat, causing the grinding surface of the grinding disc to tilt upward or downward relative to the horizontal direction. After the grinding disc is tilted to the optimal grinding angle that matches the angle of the burr at the cut edge of the sheet metal part, the high-speed rotating surface of the grinding disc can better fit the burr shape, thereby efficiently and accurately grinding the burrs at the cut edge of the sheet metal part. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the grinding disc connection structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection structure between the threaded seat and the top plate of the present invention;

[0023] Figure 4 This is a schematic diagram of the chassis and top plate positions of the present invention.

[0024] In the diagram: 1. Base; 2. Grinding disc; 3. Fixed column; 4. Chassis; 5. Support column; 6. Crossbeam; 7. Hydraulic cylinder; 8. Connecting plate; 9. Top plate; 10. Column; 11. High-definition camera; 12. First motor; 13. Threaded rod; 14. Threaded seat; 15. Equipment box; 16. Protective cover; 17. Second motor; 18. Rotating shaft; 19. Electric push rod; 20. First hinge seat; 21. Second hinge seat; 22. Third hinge seat; 23. First connecting rod; 24. Second connecting rod; 25. Guide rod; 26. Limiting ring; 27. Third motor; 28. Connecting shaft; 29. ​​Bearing; 30. Fixed seat; 31. Limiting rod; 32. Limiting block; 33. Top plate; 34. Side plate. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] Example 1: Please refer to Figure 1 - Figure 4 This embodiment of a sheet metal cutting and grinding device includes a base 1 and a grinding disc 2. A support column 5 is fixedly connected to one top end of the base 1. A crossbeam 6 is fixedly connected to the top of the support column 5. A hydraulic cylinder 7 is installed at one top end of the crossbeam 6. The bottom piston rod of the hydraulic cylinder 7 passes through the interior of the crossbeam 6 and is fixedly connected to a connecting plate 8. A top plate 9 is installed at the bottom of the connecting plate 8. A fixing column 3 is fixedly connected to the top of the base 1. A base plate 4 is rotatably connected to the top of the fixing column 3. The top plate 9 is located directly above the base plate 4. A column 10 is fixedly connected to one side of the base 1. A high-definition camera 11 is fixedly connected to the top. A first motor 12 is set at the other end of the top of the base 1. A threaded rod 13 is fixedly connected to one end of the first motor 12. A threaded seat 14 is threadedly connected to one end of the threaded rod 13. An equipment box 15 is hinged to one side of the threaded seat 14. A protective cover 16 is fixedly connected to one end of the equipment box 15. The grinding disc 2 is rotatably connected to the outside of the protective cover 16. A second motor 17 is set inside the equipment box 15. A rotating shaft 18 is fixedly connected to one end of the second motor 17. One end of the rotating shaft 18 is fixedly connected to one side of the grinding disc 2.

[0027] When it is necessary to grind the arc-shaped cut of the sheet metal part, the sheet metal part is first placed on the top of the chassis 4, and then the hydraulic cylinder 7 is activated. The bottom piston rod of the hydraulic cylinder 7 will drive the connecting plate 8 to move downward, and the connecting plate 8 will drive the top plate 9 to move downward. The top plate 9 moves down and gradually approaches the top of the sheet metal part until the rubber buffer pad at the bottom of the top plate 9 is in close contact with the top of the sheet metal part. Thus, the sheet metal is clamped and fixed by the chassis 4 and the top plate 9 to prevent displacement due to vibration during the grinding process.

[0028] Secondly, the high-definition camera 11 is positioned directly in front of the sheet metal cut area to capture real-time images of the sheet metal. Image recognition algorithms, such as edge detection, are used to accurately locate the relative coordinates between the cut and the grinding disc 2. The system transmits the coordinate data to the PCL program, which controls the start of the first motor 12. The output shaft of the first motor 12 drives the threaded rod 13 to rotate via a coupling. The threaded rod 13 drives the threaded seat 14 to move, which in turn drives the equipment box 15 to move. The equipment box 15 then drives the protective cover 16 to move, which in turn drives the grinding disc 2 to move. The grinding disc 2 comes into contact with the sheet metal cut, and the contact pressure is fed back by a pressure sensor on one side of the grinding disc 2 and controlled within 10-30N to prevent excessive pressure from deforming the cut. At the same time, the second motor 17 starts, which drives the rotating shaft 18 to rotate. The rotating shaft 18 drives the grinding disc 2 to rotate at high speed, thereby grinding the cut of the sheet metal.

[0029] Furthermore, a third motor 27 is installed inside the fixed column 3. The top of the third motor 27 is fixedly connected to a connecting shaft 28, which is also fixedly connected to the bottom of the chassis 4. When the third motor 27 is started, it drives the connecting shaft 28 to rotate through a reducer. The connecting shaft 28 then drives the chassis 4 to rotate, which in turn drives the sheet metal parts to rotate slowly. During this process, the high-definition camera 11 continuously monitors the relative position of the cut and the grinding disc 2, and feeds back the deviation data to the PCL program in real time. The PCL program controls the direction and speed of the first motor 12, driving the grinding disc 2 to move back and forth synchronously with the cut trajectory, ensuring that the grinding disc 2 always maintains stable contact with the cut (contact deviation ≤ 0.5mm), achieving uniform grinding of the entire circumference of the annular cut, and avoiding local over-grinding or missed grinding.

[0030] The working principle of the existing PCL control program is as follows: The high-definition camera 11 acquires high-definition images of the sheet metal cutting area (resolution is usually ≥1920×1080, frame rate is above 30fps). First, distortion correction is performed through the camera's intrinsic parameters (focal length, principal point coordinates) and extrinsic parameters (relative relationship between the camera installation position and the equipment coordinate system) to eliminate image distortion caused by lens optical distortion and ensure the geometric dimensional accuracy of the cutting edge.

[0031] Using a binocular camera, the PCL program calculates the depth information of the cut area through a stereo matching algorithm, converting the two-dimensional image into three-dimensional point cloud data (point cloud density ≥100 points / mm²), accurately restoring the three-dimensional contour of the cut (including parameters such as the radius of curvature and depth of the arc trajectory).

[0032] The PCL program extracts the edge contour of the cut using an edge detection algorithm (such as the Canny operator), and then uses the RANSAC algorithm to remove noise points (such as reflective points from grinding debris) while retaining valid edge points. For arc-shaped cuts, the least squares method is used to fit the arc equation (determining the center coordinates, radius, and arc range) to obtain the precise three-dimensional motion trajectory of the cut.

[0033] Transform the three-dimensional coordinates of the cut trajectory from the "camera coordinate system" to the "device motion coordinate system":

[0034] Camera coordinate system: with the lens optical center as the origin, the image plane as the XY axis, and the optical axis as the Z axis;

[0035] Equipment motion coordinate system: with the starting point of threaded rod 13 as the origin of the X-axis and the rotation center of chassis 4 as the reference point of the Y-axis, the coordinates of the cutting trajectory are mapped to the target motion coordinates of the grinding disc 2 through a preset transformation matrix (including rotation angle and translation amount). The X-axis corresponds to the axial movement of the threaded rod, and the Y-axis corresponds to the rotation compensation of the chassis.

[0036] The PCL program calculates the deviation (ΔX, ΔY) between the current position of the grinding disc 2 (feedback from the encoder of the first motor) and the target position based on the mapped target coordinates, and generates the control signal for the first motor 12 based on the PID control algorithm (proportional-integral-derivative).

[0037] Proportional term (P): Directly adjusts the motor speed according to the magnitude of the deviation, quickly reducing the deviation;

[0038] Integral term (I): Accumulates long-term deviations to eliminate system static errors (such as clearance in threaded drives).

[0039] Differential term (D): Predict the trend of deviation changes and avoid overshoot (such as the grinding disc overshooting to the outside of the cut).

[0040] Real-time feedback and dynamic correction: The high-definition camera 11 refreshes the image every 30ms, and the PCL program repeats the above feature extraction and coordinate calculation process to update the deviation data in real time. If the deviation is detected to exceed the threshold (e.g., >0.3mm), the direction and speed of the first motor 12 are immediately adjusted. For example, when the sheet metal part rotates clockwise with the chassis 4, the program synchronously controls the grinding disc 2 to move forward along the threaded rod axis, always maintaining contact with the tangential direction of the arc-shaped cut, ensuring that the grinding trajectory and the cut contour are completely matched.

[0041] Furthermore, the top of the connecting plate 8 is fixedly connected to two guide rods 25, which are movably connected to the inside of the crossbeam 6. The top of the guide rods 25 is fixedly connected to a limit ring 26, which is located at the top of the crossbeam 6. When the hydraulic cylinder 7 drives the connecting plate 8 to move downward, the connecting plate 8 will drive the guide rods 25 to move downward. The top of the guide rods 25 will move along the inside of the crossbeam 6, thereby keeping the connecting plate 8 stable when it moves up and down. By setting the limit ring 26, the limit ring 26 will limit the movement of the guide rods 25 and prevent one end of the guide rods 25 from leaving the inside of the crossbeam 6.

[0042] Furthermore, a bearing 29 is fixedly connected to the top of the top plate 9. The bearing 29 is embedded in the bottom of the connecting plate 8. When the chassis 4 drives the sheet metal parts to rotate, the friction between the sheet metal parts and the top plate 9 will drive the top plate 9 to rotate. Through the bearing 29 fixed to the top of the top plate 9, the top plate 9 rotates synchronously with the sheet metal parts along the bottom of the connecting plate 8.

[0043] Furthermore, the top of the base 1 is fixedly connected to two fixed seats 30, and the two ends of the threaded rod 13 are rotatably connected inside the two fixed seats 30. By setting the fixed seats 30, the two ends of the threaded rod 13 are rotatably connected inside the fixed seats 30, and the fixed seats 30 will provide support and limit function for the two ends of the threaded rod 13.

[0044] Furthermore, two limiting rods 31 are fixedly connected between the two fixed seats 30, and two limiting blocks 32 are fixedly connected to the bottom of the threaded seat 14. The limiting blocks 32 are movably connected to the outside of the limiting rods 31. When the threaded seat 14 moves, the threaded seat 14 will drive the limiting blocks 32 to move. The limiting blocks 32 will move along the outside of the limiting rods 31, thereby limiting the movement of the threaded seat 14.

[0045] Furthermore, the bottom of the threaded seat 14 is fixedly connected to a top plate 33, which is movably connected to the top of the fixed seat 30. Two side plates 34 are fixedly connected to both sides of the top plate 33, and the side plates 34 are movably connected to both sides of the fixed seat 30. When the threaded seat 14 moves, it will drive the top plate 33 and the side plates 34 to move. The top plate 33 and the side plates 34 will move on both sides and the top of the fixed seat 30, thereby protecting the space between the two fixed seats 30 and preventing dust and iron filings from entering the inner side of the fixed seat 30 and damaging the threaded rod 13.

[0046] Example 2: Based on Example 1, this example describes the specific structure of the electric push rod 19. The electric push rod 19 is hinged to one side of the top of the threaded seat 14. One end of the electric push rod 19 is hinged to the inside of the protective cover 16. A first hinge seat 20 is fixedly connected to one side of the threaded seat 14. One end of the electric push rod 19 is hinged to the first hinge seat 20. A second hinge seat 21 is fixedly connected to one side of the protective cover 16. The other end of the electric push rod 19 is hinged to the second hinge seat 21. A third hinge seat 22 is fixedly connected to one side of the threaded seat 14. One end of the equipment box 15 is hinged to the inside of the third hinge seat 22.

[0047] When the grinding disc 2 grinds the cut edge of the sheet metal part, the electric push rod 19 is activated. The electric push rod 19 will push the top of the protective cover 16 to move, causing one end of the protective cover 16 to drive the equipment box 15 to rotate. One end of the equipment box 15 will rotate around the inside of the third hinge seat 22, causing the grinding surface of the grinding disc 2 to tilt upward or downward relative to the horizontal direction (the tilt angle can be precisely controlled by the stroke of the electric push rod, with an adjustment range of 5°-30° to adapt to different angles of burrs). After the grinding disc 2 is tilted to the optimal grinding angle that matches the angle of the burrs at the cut edge of the sheet metal part, the electric push rod 19 is kept in the extended state. At this time, the high-speed rotating surface of the grinding disc 2 can better fit the shape of the burrs, thereby efficiently and accurately grinding the burrs at the cut edge of the sheet metal part.

[0048] Secondly, when the electric push rod 19 pushes one end of the protective cover 16 to move, one end of the electric push rod 19 moves around the inside of the first hinge seat 20, and the other end of the electric push rod 19 will move around the inside of the second hinge seat 21.

[0049] Furthermore, a first connecting rod 23 is hinged to one side of the threaded seat 14. A second connecting rod 24 is rotatably connected to one end of the first connecting rod 23. One end of the second connecting rod 24 is hinged to the inside of the protective cover 16. When the equipment box 15 and the protective cover 16 drive the grinding disc 2 to rotate at a certain angle, the protective cover 16 will drive the second connecting rod 24 to rotate. One end of the second connecting rod 24 will drive the first connecting rod 23 to rotate. By providing the first connecting rod 23 and the second connecting rod 24, the first connecting rod 23 and the second connecting rod 24 will provide auxiliary support for the rotation of the equipment box 15 and the protective cover 16.

[0050] Working principle: When grinding the arc-shaped cut of a sheet metal part, it is first placed on the chassis 4. The hydraulic cylinder 7 is activated to move the top plate 9 down, which, together with the chassis 4, clamps and fixes the sheet metal part to prevent vibration and displacement. Then, the high-definition camera 11 captures images and positions the relative coordinates of the cut and the grinding disc 2. Under the control of the PCL program, the first motor 12 drives the grinding disc 2 to move until it contacts the cut. At the same time, the second motor 17 drives the grinding disc 2 to rotate at high speed for grinding. Subsequently, the third motor 27 drives the chassis 4 and the sheet metal part to rotate slowly through the connecting shaft 28. The camera continuously monitors and provides feedback on the deviation. The PCL program controls the first motor 12 to adjust the grinding disc 2 to move synchronously, ensuring that the contact deviation is ≤0.5mm, so as to achieve uniform grinding of the entire circumference of the annular cut.

[0051] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A grinding method using a sheet metal part cutting grinding device, the sheet metal part cutting grinding device including a base (1) and a grinding disc (2), a support column (5) is fixedly connected to one top end of the base (1), a crossbeam (6) is fixedly connected to the top of the support column (5), a hydraulic cylinder (7) is provided at one top end of the crossbeam (6), a connecting plate (8) is fixedly connected to the bottom piston rod of the hydraulic cylinder (7) through the interior of the crossbeam (6), a top plate (9) is provided at the bottom of the connecting plate (8), a fixing column (3) is fixedly connected to the top of the base (1), a base plate (4) is rotatably connected to the top of the fixing column (3), the top plate (9) is located directly above the base plate (4), a column (10) is fixedly connected to one side of the base (1), and a high-definition camera (11) is fixedly connected to the top of the column (10). in, A first motor (12) is provided at the other end of the top of the base (1). One end of the first motor (12) is fixedly connected to a threaded rod (13). One end of the threaded rod (13) is threadedly connected to a threaded seat (14). One side of the threaded seat (14) is hingedly connected to an equipment box (15). One end of the equipment box (15) is fixedly connected to a protective cover (16). The grinding disc (2) is rotatably connected to the outside of the protective cover (16). A second motor (17) is provided inside the equipment box (15). One end of the second motor (17) is... A rotating shaft (18) is fixedly connected to one end of a grinding disc (2). An electric push rod (19) is hinged to one side of the top of the threaded seat (14). One end of the electric push rod (19) is hinged to the inside of the protective cover (16). A first connecting rod (23) is hinged to the inside of one side of the threaded seat (14). A second connecting rod (24) is rotatably connected to one end of the first connecting rod (23). One end of the second connecting rod (24) is hinged to the inside of the protective cover (16). Secondly, this grinding method utilizes a PCL-controlled sheet metal part cutting grinding device for grinding, characterized by the following steps: The high-definition camera (11) captures high-definition images of the sheet metal cutting area. First, distortion correction is performed by the camera's intrinsic and extrinsic parameters to eliminate image distortion caused by lens optical distortion and ensure the geometric accuracy of the cutting edge. Using a binocular camera, the PCL program calculates the depth information of the cut area through a stereo matching algorithm, converting the two-dimensional image into three-dimensional point cloud data, and accurately restoring the three-dimensional contour of the cut. The PCL program extracts the edge contour of the cut using an edge detection algorithm, then uses the RANSAC algorithm to remove noise points and retain valid edge points. For arc-shaped cuts, it fits the arc equation using the least squares method to obtain the precise three-dimensional motion trajectory of the cut. Transform the three-dimensional coordinates of the cut trajectory from the "camera coordinate system" to the "device motion coordinate system": Camera coordinate system: with the lens optical center as the origin, the image plane as the XY axis, and the optical axis as the Z axis; Equipment motion coordinate system: with the starting point of the threaded rod (13) as the origin of the X-axis and the rotation center of the chassis (4) as the reference point of the Y-axis, the coordinates of the cutting trajectory are mapped to the target motion coordinates of the grinding disc (2) through the preset transformation matrix; The PCL program calculates the deviation between the current position of the grinding disc (2) and the target position based on the mapped target coordinates, and generates the control signal of the first motor (12) based on the PID control algorithm. Real-time feedback and dynamic correction: The high-definition camera (11) refreshes the image every 30ms. The PCL program repeats the above feature extraction and coordinate calculation process and updates the deviation data in real time. If the deviation exceeds the threshold, the direction and speed of the first motor (12) are adjusted immediately. When the sheet metal part rotates clockwise with the chassis (4), the program synchronously controls the grinding disc (2) to move forward along the threaded rod axis, always keeping in contact with the tangent direction of the arc cut, ensuring that the grinding trajectory and the cut contour are completely matched.

2. A grinding method using a sheet metal part cutting grinding device according to claim 1, characterized in that, The threaded seat (14) is fixedly connected to a first hinge seat (20) on one side, and one end of the electric push rod (19) is hingedly connected to the first hinge seat (20). The protective cover (16) is fixedly connected to a second hinge seat (21) on one side, and the other end of the electric push rod (19) is hingedly connected to the second hinge seat (21).

3. A grinding method using a sheet metal part cutting grinding device according to claim 1, characterized in that, The threaded seat (14) is fixedly connected to a third hinge seat (22) on one side, and one end of the equipment box (15) is hinged to the inside of the third hinge seat (22).

4. A grinding method using a sheet metal part cutting grinding device according to claim 1, characterized in that, The top of the connecting plate (8) is fixedly connected to two guide rods (25), which are movably connected inside the crossbeam (6). The top of the guide rods (25) is fixedly connected to a limiting ring (26), which is located at the top of the crossbeam (6).

5. A grinding method using a sheet metal part cutting grinding device according to claim 1, characterized in that, The fixed column (3) is equipped with a third motor (27), and the top of the third motor (27) is fixedly connected to a connecting shaft (28), and the top of the connecting shaft (28) is fixedly connected to the bottom of the chassis (4).

6. A grinding method using a sheet metal part cutting grinding device according to claim 1, characterized in that, The top of the top plate (9) is fixedly connected to a bearing (29), which is embedded in the bottom of the connecting plate (8).

7. A grinding method using a sheet metal part cutting grinding device according to claim 1, characterized in that, The top of the base (1) is fixedly connected to two fixed seats (30), and the two ends of the threaded rod (13) are rotatably connected inside the two fixed seats (30).

8. A grinding method using a sheet metal part cutting grinding device according to claim 7, characterized in that, Two limiting rods (31) are fixedly connected between the two fixed seats (30), and two limiting blocks (32) are fixedly connected to the bottom of the threaded seat (14). The limiting blocks (32) are movably connected to the outside of the limiting rods (31).

9. A grinding method using a sheet metal part cutting grinding device according to claim 8, characterized in that, The bottom of the threaded seat (14) is fixedly connected to a top plate (33), which is movably connected to the top of the fixed seat (30). Two side plates (34) are fixedly connected to both sides of the top plate (33), which are movably connected to both sides of the fixed seat (30).

Images