Metal plate cutting device and cutting method for garbage can production

Abstract

The invention relates to the technical field of cutting devices, and discloses a metal plate cutting device for garbage can production and a cutting method.The metal plate cutting device for garbage can production comprises a cutting table, a supporting plate arranged above the cutting table and a driving mechanism used for driving the supporting plate to ascend and descend, and a supporting seat is slidably arranged below the supporting plate; a sliding rod is arranged on the inner side of the supporting seat in a penetrating mode and is in sliding fit with the supporting seat, a connecting piece is fixedly installed at one end of the sliding rod, and a cutting mechanism is installed at the bottom end of the connecting piece. Through the arrangement of the sliding seat, the supporting seat can move left and right, the cutting mechanism rotates around the supporting seat, so that the circle center position of a cutting circle can be adjusted, through the arrangement of the sliding rod, the sliding rod can slide front and back relative to the supporting seat, and then the distance between the cutting mechanism and the supporting seat can be adjusted; and therefore, the radius of a cut circle can be adjusted, so that circular surfaces with different radiuses can be cut according to requirements.

Description

Technical Field

[0001] The invention relates to the technical field of cutting devices, and in particular to a metal plate cutting device and a cutting method for producing garbage cans. Background Art

[0002] The metal sheets used in the production of trash cans mainly include cold-rolled steel sheets, stainless steel sheets and galvanized steel sheets. Among them, cold-rolled steel sheets are made by further cold-rolling ordinary carbon structural steel hot-rolled steel sheets, and have the advantages of high dimensional accuracy and good surface quality; stainless steel sheets refer to steel that is resistant to corrosion by weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts, also known as stainless acid-resistant steel; galvanized steel sheets are steel sheets coated with a layer of metal zinc on the surface to prevent the surface of the steel sheet from being corroded. The metal sheet cutting device used in the production of trash cans is a device used to accurately cut metal sheets according to design requirements.

[0003] Chinese patent CN113275653B discloses a metal sheet cutting device, including a fixed seat, a clamping mechanism and a cutting mechanism; the clamping mechanism includes a first fixed plate fixedly connected to the end of the fixed seat, the middle part of the first fixed plate is threadedly connected to the first screw, the end of the first screw near the center of the device is rotatably connected to the sliding plate, and the side of the sliding plate near the center of the device is provided with a top wheel; the cutting mechanism includes a main shaft rotatably connected to the fixed seat, the end of the main shaft away from the fixed seat is fixedly connected to one end of the rotating plate, the other end of the rotating plate is provided with a cutting assembly, and an angle locking assembly is provided between the main shaft and the fixed seat. This scheme is suitable for a metal sheet cutting device, through the up and down movement of the clamping plate and the cooperation of the support wheel, so that the device can be fixed on one end of the metal sheet or move relative to the side of the metal sheet, so that the device can cut the metal sheet in a straight line or in an arc.

[0004] When producing trash cans, the main metal plates used are generally rectangular and circular. As shown in the above patent, the existing metal plate cutting devices have significant functional limitations: they can usually only perform straight line or arc cutting operations. For the need to accurately cut a complete circle, these devices are relatively inconvenient. In addition, when performing arc cutting, the adjustment process of the cutting radius is also relatively cumbersome, lacking flexibility and convenience.

[0005] Therefore, it is necessary to provide a metal sheet cutting device and a cutting method for producing trash cans to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a metal plate cutting device and a cutting method for producing trash cans, wherein the radius of the cutting circle can be adjusted, and not only circular cutting but also linear cutting can be performed, and switching the cutting mode is relatively convenient.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a metal sheet cutting device for garbage can production, comprising a cutting table, a support plate arranged above the cutting table and a driving mechanism for driving the support plate to rise and fall, a support seat is slidably arranged under the support plate, a sliding rod is penetrated through the inner side of the support seat, and the sliding rod and the support seat are slidably matched, a connecting piece is fixedly installed at one end of the sliding rod, a cutting mechanism is installed at the bottom end of the connecting piece, a connecting shaft is fixedly installed at the top end of the support seat, a hand wheel is fixedly installed at the top end of the connecting shaft, a mounting cylinder is installed at the bottom end of the support seat, a fixed seat is installed at the bottom end of the mounting cylinder, a first locking column is arranged on the inner side of the mounting cylinder, and the bottom end of the first locking column extends out of the mounting cylinder.

[0008] The present invention is further configured as follows: a through slot is provided inside the support seat, the slide rod passes through the through slot, a first through hole is provided in the middle of the bottom end of the support seat, the first through hole is connected to the through slot, and the first through hole is adapted to the first locking column.

[0009] The present invention is further configured as follows: the mounting tube includes a connecting tube and a connecting column, the top end of the connecting column is fixedly connected to the support seat, the bottom end of the connecting column extends into the connecting tube, and the connecting column and the connecting tube are slidably matched, the top end of the first locking column extends into the interior of the connecting column, and the first locking column and the connecting column are slidably matched, and the bottom end of the connecting tube is rotatably connected to the fixed seat.

[0010] The present invention is further configured as follows: a connecting disk is rotatably installed at the bottom end of the first locking column, a first spring is fixedly connected to the top end of the connecting disk, an adapting groove is provided at the bottom of the fixing seat, the top end of the first spring is fixedly connected to the top inner wall of the adapting groove, and the first spring is sleeved on the first locking column.

[0011] The present invention is further configured as follows: a locking bolt is threadedly mounted on the connecting cylinder, and one end of the locking bolt is pressed on the outer wall of the connecting column.

[0012] The present invention is further configured as follows: a slide groove is provided on the support plate, a slide seat is slidably installed in the slide groove, the support seat is fixedly installed on the bottom end of the slide seat, the connecting shaft passes through the slide seat, and the connecting shaft and the slide seat are rotatably matched.

[0013] The present invention is further configured as follows: the cutting mechanism includes a mounting box, a motor and a cutting wheel, the mounting box is fixedly mounted on the bottom end of the connecting piece, the motor is fixedly mounted inside the mounting box, and the cutting wheel is fixedly mounted on the output end of the motor.

[0014] The present invention is further configured as follows: the driving mechanism includes a sliding column, a support ring, a second spring and a pedal, support rings are fixedly installed on both sides of the cutting table, the sliding column passes through the support ring, and the sliding column and the support ring are slidably matched, the top end of the sliding column is fixedly connected to the end of the support plate, the top end of the support ring is fixedly connected to the second spring, the top end of the second spring is fixedly connected to the end of the support plate, and the bottom end of the sliding column is fixedly connected to the pedal.

[0015] The present invention is further configured as follows: connecting seats are fixedly installed on both sides of the connecting tube, a second locking column is fixedly installed on the top of the connecting seat, second through holes are opened on both sides of the bottom of the support seat, the second through holes are connected to the through groove, and the second through holes are adapted to the second locking column.

[0016] A method for cutting metal sheets for producing trash cans, using the above-mentioned metal sheet cutting device for producing trash cans, comprises the following steps: S1. Place the metal sheet to be cut on the workbench; S2. When cutting a circular surface, the support seat is moved to the center of the circular surface by moving the hand wheel, and the position of the cutting mechanism is adjusted by sliding the slide bar, thereby adjusting the cutting radius, and then the support plate is driven downward by the driving mechanism so that the fixed seat contacts the top wall of the metal sheet to be cut. At the same time, when the support plate moves downward, the top end of the first locking column extends into the interior of the support seat to lock the slide bar, and when the support plate moves downward, the cutting mechanism is driven downward by the support seat, the slide bar and the connecting piece to cut the metal sheet to be cut. During the cutting process, the hand wheel is controlled to rotate, thereby driving the support seat to rotate through the connecting shaft, so that the cutting mechanism rotates in a circular trajectory to cut a circular surface on the metal sheet to be cut; S3. When cutting a straight line, after the support plate is driven downward by the driving mechanism, the support seat is made to slide along the length direction of the support plate by pulling the hand wheel, so that the cutting mechanism slides along the straight line, thereby performing a straight line cutting on the metal plate to be cut.

[0017] In summary, the present invention has the following beneficial effects: The present invention enables the support seat to move left and right through the setting of the slide seat, and the cutting mechanism rotates around the support seat, so that the center position of the cutting circle can be adjusted. The slide rod is set so that the slide rod can slide back and forth relative to the support seat, thereby adjusting the distance between the cutting mechanism and the support seat, so that the radius of the cutting circle can be adjusted, so as to cut circular surfaces of different radii according to needs; When the invention performs circular cutting, it only needs to move the support plate downward to simultaneously realize the cutting wheel pressing on the metal plate for cutting, locking the slide seat and locking the slide rod. When the support plate is reset upward, the slide seat can slide left and right, and the slide rod can slide back and forth, so that the position of the axis center line during circular cutting and the radius of the cutting circle can be conveniently adjusted, thereby improving the convenience of operation. When the present invention performs linear cutting, in order to prevent the support seat from rotating and affecting the cutting, the locking bolt can be loosened to reduce the overall length of the connecting column and the connecting tube, so that the two second locking columns are respectively inserted into the two second through holes and pressed on the rubber strip. On the one hand, the support seat is locked so that the support seat cannot rotate, and on the other hand, the slide rod is locked to prevent the slide rod from sliding. Subsequently, the slide seat can be driven to slide along the slide groove by sliding the hand wheel, thereby performing linear cutting, so that the device can not only perform circular cutting, but also linear cutting, and switching the cutting mode is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after the cutting table is removed; Figure 4 It is a schematic structural diagram of the cutting mechanism, the mounting cylinder, the sliding rod and the fixing seat of the present invention; Figure 5 It is a schematic diagram of the position structure of the second locking column when performing circular cutting in the present invention; Figure 6 It is a schematic diagram of the position structure of the second locking column when performing straight-line cutting in the present invention; Figure 7 It is a structural schematic diagram of the support base of the present invention; Figure 8 It is a structural schematic diagram of the sliding rod of the present invention.

[0019] In the figure: 1. cutting table; 2. support plate; 201. slide groove; 3. slide seat; 4. support seat; 401. through groove; 402. first through hole; 403. second through hole; 5. slide rod; 501. scale; 502. groove; 503. rubber strip; 6. connector; 7. mounting box; 8. motor; 9. cutting wheel; 10. connecting shaft; 11. hand wheel; 12. connecting cylinder; 13. connecting column; 14. fixing seat; 1401. adapter groove; 15. first locking column; 16. first spring; 17. connecting plate; 18. connecting seat; 19. second locking column; 20. support ring; 21. slide column; 22. second spring; 23. pedal; 24. locking bolt; 25. positioning plate. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] See also Figures 1 to 8 In the embodiment of the present invention, a metal sheet cutting device for garbage can production comprises a cutting table 1, a support plate 2 arranged above the cutting table 1 and a driving mechanism for driving the support plate 2 to rise and fall, a support seat 4 is slidably arranged below the support plate 2, a slide bar 5 is penetrated through the inner side of the support seat 4, and the slide bar 5 is slidably matched with the support seat 4, a connecting piece 6 is fixedly installed on one end of the slide bar 5, and a cutting mechanism is installed on the bottom end of the connecting piece 6, a connecting shaft 10 is fixedly installed on the top end of the support seat 4, a hand wheel 11 is fixedly installed on the top end of the connecting shaft 10, a mounting cylinder is installed on the bottom end of the support seat 4, a fixed seat 14 is installed on the bottom end of the mounting cylinder, a first locking column 15 is arranged on the inner side of the mounting cylinder, and the bottom end of the first locking column 15 extends out of the mounting cylinder, when the support plate 2 moves downward, the top end of the first locking column 15 extends into the interior of the support seat 4 to lock the slide bar 5; when it is used specifically, the metal sheet to be cut is placed on the workbench, and when cutting a circular surface, the first locking column 15 is locked by the first locking column 15. The support seat 4 is moved to the center of the circular surface by moving the hand wheel 11, and then the position of the cutting mechanism is adjusted by sliding the slide bar 5, so as to adjust the cutting radius, and then the support plate 2 is driven downward by the driving mechanism to make the fixed seat 14 contact with the top wall of the metal sheet to be cut. At the same time, when the support plate 2 moves downward, the top end of the first locking column 15 extends into the interior of the support seat 4 to lock the slide bar 5, and when the support plate 2 moves downward, the cutting mechanism is driven downward by the support seat 4, the slide bar 5 and the connecting member 6 to cut the metal sheet to be cut. During the cutting process, the hand wheel 11 is controlled to rotate, so as to drive the support seat 4 to rotate through the connecting shaft 10, so that the cutting mechanism rotates in a circular trajectory to cut a circular surface on the metal sheet to be cut. When cutting a straight line, after the support plate 2 is driven downward by the driving mechanism, the support seat 4 is pulled along the length direction of the support plate 2, so that the cutting mechanism slides along a straight line, so as to cut the metal sheet to be cut in a straight line; The present invention arranges the slide seat 3 so that the support seat 4 can move left and right, and the cutting mechanism rotates around the support seat 4, so that the center position of the cutting circle can be adjusted. The slide rod 5 is arranged so that the slide rod 5 can slide back and forth relative to the support seat 4, and then the distance between the cutting mechanism and the support seat 4 can be adjusted, so that the radius of the cutting circle can be adjusted, so as to cut circular surfaces of different radii according to needs.

[0022] In this embodiment, preferably, a through slot 401 is provided inside the support seat 4, and the slide bar 5 passes through the through slot 401 to achieve sliding cooperation between the slide bar 5 and the support seat 4. A first through hole 402 is provided in the middle of the bottom end of the support seat 4, and the first through hole 402 is connected to the through slot 401. The first through hole 402 is adapted to the first locking column 15, so that the top end of the first locking column 15 can extend into the through slot 401. A groove 502 is provided at the bottom of the slide bar 5, and a rubber strip 5 is fixedly arranged in the groove 502. 03. After the first locking column 15 extends into the through groove 401, it can press on the rubber strip 503, thereby locking the slide bar 5. The setting of the rubber strip 503 can improve the firmness of locking the slide bar 5; the top wall of the slide bar 5 is provided with a scale 501, and the distance between the cutting wheel 9 and the cutting circle can be read through the scale 501, so as to directly obtain the cutting radius, so as to adjust the cutting radius; it should be noted that the sliding of the slide bar 5 has a certain damping, which can prevent the slide bar 5 from sliding when continuously cutting the same circle.

[0023] In this embodiment, preferably, the installation cylinder includes a connecting cylinder 12 and a connecting column 13, the top end of the connecting column 13 is fixedly connected to the support seat 4, the bottom end of the connecting column 13 extends into the connecting cylinder 12, and the connecting column 13 and the connecting cylinder 12 are slidably matched, the top end of the first locking column 15 extends into the interior of the connecting column 13, and the first locking column 15 and the connecting column 13 are slidably matched, the bottom end of the connecting cylinder 12 is rotatably connected to the fixed seat 14, the bottom of the fixed seat 14 is made of rubber, the bottom end of the first locking column 15 is rotatably installed with a connecting disk 17, and the top end of the connecting disk 17 is fixedly connected with a first spring 16, An adapting groove 1401 is provided at the bottom of the fixing seat 14, and the top end of the first spring 16 is fixedly connected to the top inner wall of the adapting groove 1401, and the first spring 16 is sleeved on the first locking column 15; a locking bolt 24 is threadedly installed on the connecting tube 12, and one end of the locking bolt 24 is pressed on the outer wall of the connecting column 13. When performing circular cutting, the connecting column 13 can be locked by the locking bolt 24, so that the installation tube cannot be extended or retracted; when cutting the metal sheet, the driving mechanism drives the support plate 2 to move downward, so that the cutting wheel 9 is pressed on the metal sheet for cutting, and at the same time, the installation tube drives the fixing seat 14 moves downward, the connecting plate 17 first contacts with the metal plate, so that the first locking column 15 stops moving downward, and then the top end of the first locking column 15 is pressed on the rubber strip 503, thereby locking the slide bar 5, so that the slide bar 5 cannot slide relative to the support seat 4. At the same time, when the connecting plate 17 shrinks into the adapter groove 1401, the fixing seat 14 is also pressed on the top wall of the metal plate. Since the bottom of the fixing seat 14 is made of rubber, it is difficult for the fixing seat 14 to slide on the metal plate, so that the connecting tube 12, the connecting column 13, the support seat 4 and the slide seat 3 cannot slide, so that the hand wheel 11 passes through the connecting shaft 10, When the support seat 4 and the slide bar 5 drive the cutting mechanism to rotate and draw a circle, the slide seat 3 will not slide, ensuring the accuracy of drawing the circle. Moreover, when the support plate 2 moves downward, the first locking column 15 can automatically lock the slide bar 5, so that the slide bar 5 cannot slide relative to the support seat 4. Only the support plate 2 needs to be moved downward, and at the same time, the cutting wheel 9 is pressed on the metal plate for cutting, the slide seat 3 is locked, and the slide bar 5 is locked. When the support plate 2 is reset upward, the slide seat 3 can slide left and right, and the slide bar 5 can slide back and forth, so that the position of the axis line during circular cutting and the radius of the cutting circle can be conveniently adjusted, thereby improving the convenience of operation.

[0024] In this embodiment, preferably, a slide groove 201 is opened on the support plate 2, and a slide seat 3 is slidably installed in the slide groove 201. The support seat 4 is fixedly installed at the bottom end of the slide seat 3, so that the support seat 4 can be slidably installed under the support plate 2. The connecting shaft 10 passes through the slide seat 3, and the connecting shaft 10 rotates in cooperation with the slide seat 3.

[0025] In this embodiment, preferably, the cutting mechanism includes a mounting box 7, a motor 8 and a cutting wheel 9, the mounting box 7 is fixedly mounted on the bottom end of the connecting member 6, the motor 8 is fixedly mounted inside the mounting box 7, and the cutting wheel 9 is fixedly mounted on the output end of the motor 8.

[0026] In this embodiment, preferably, the driving mechanism includes a slide column 21, a support ring 20, a second spring 22 and a pedal 23. Support rings 20 are fixedly installed on both sides of the cutting table 1. The slide column 21 passes through the support ring 20, and the slide column 21 slides with the support ring 20. The top end of the slide column 21 is fixedly connected to the end of the support plate 2, and the top end of the support ring 20 is fixedly connected to the second spring 22. The top end of the second spring 22 is fixedly connected to the end of the support plate 2, and the bottom end of the slide column 21 is fixedly connected to the pedal 23; when performing a cutting operation, the operator steps on the pedal 23 with his foot, so that the pedal 23 drives the support plate 2 to move downward through the slide column 21, and then drives the cutting wheel 9 to move downward for cutting. After the cutting is completed, the pedal 23 is released, so that the support plate 2 moves upward and resets under the elastic action of the second spring 22.

[0027] In this embodiment, preferably, a connecting seat 18 is fixedly installed on both sides of the connecting cylinder 12, and a second locking column 19 is fixedly installed on the top of the connecting seat 18. Second through holes 403 are opened on both sides of the bottom of the support seat 4, and the second through holes 403 are connected to the through groove 401, and the second through holes 403 are adapted to the second locking columns 19; when linear cutting is required, in order to prevent the rotation of the support seat 4 from affecting the cutting, the locking bolt 24 can be loosened to reduce the overall length of the connecting column 13 and the connecting cylinder 12, so that the two second locking columns 19 are respectively inserted into the two second through holes 403 and pressed on the rubber strip 503. On the one hand, the support seat 4 is locked so that the support seat 4 cannot rotate, and on the other hand, the slide bar 5 is locked to prevent the slide bar 5 from sliding. Then, the slide seat 3 can be driven to slide along the slide groove 201 by sliding the handwheel 11, so as to perform linear cutting, so that the device can not only perform circular cutting, but also linear cutting, and switching the cutting mode is more convenient.

[0028] In this embodiment, preferably, positioning plates 25 are fixedly installed on both sides of the top of the cutting table 1. The cross-section of the positioning plate 25 is an L-shaped structure. The plate to be cut can be positioned by the positioning plate 25. The positioning plate 25 can be disassembled and adjusted to the installation position to adapt to metal plates of different widths.

[0029] The present invention also discloses a method for cutting a metal sheet for producing a garbage can, comprising the following steps: S1. Place the metal sheet to be cut on the workbench; S2. When cutting a circular surface, the support seat 4 is moved to the center of the circular surface by moving the hand wheel 11, and then the position of the cutting mechanism is adjusted by sliding the slide bar 5, so as to adjust the cutting radius, and then the support plate 2 is driven downward by the driving mechanism so that the fixed seat 14 contacts the top wall of the metal sheet to be cut. At the same time, when the support plate 2 moves downward, the top end of the first locking column 15 extends into the interior of the support seat 4 to lock the slide bar 5, and when the support plate 2 moves downward, the cutting mechanism is driven downward by the support seat 4, the slide bar 5 and the connecting member 6 to cut the metal sheet to be cut. During the cutting process, the hand wheel 11 is controlled to rotate, so as to drive the support seat 4 to rotate through the connecting shaft 10, so that the cutting mechanism rotates in a circular trajectory to cut a circular surface on the metal sheet to be cut; S3. When cutting a straight line, after the support plate 2 is driven downward by the driving mechanism, the support seat 4 is made to slide along the length direction of the support plate 2 by pulling the hand wheel 11, so that the cutting mechanism slides along the straight line, thereby performing a straight line cutting on the metal plate to be cut.

[0030] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A metal sheet cutting device for producing trash cans, comprising a cutting table (1), a support plate (2) arranged above the cutting table (1), and a driving mechanism for driving the support plate (2) to rise and fall, characterized in that: A support seat (4) is slidably arranged below the support plate (2), a sliding rod (5) is penetrated through the inner side of the support seat (4), and the sliding rod (5) and the support seat (4) are slidably matched, a connecting piece (6) is fixedly installed on one end of the sliding rod (5), and a cutting mechanism is installed on the bottom end of the connecting piece (6), a connecting shaft (10) is fixedly installed on the top end of the support seat (4), and a hand wheel (11) is fixedly installed on the top end of the connecting shaft (10), a mounting tube is installed on the bottom end of the support seat (4), and a fixed seat (14) is installed on the bottom end of the mounting tube, and a first locking column (15) is arranged on the inner side of the mounting tube, and the bottom end of the first locking column (15) protrudes out of the mounting tube.

2. The metal sheet cutting device for producing trash cans according to claim 1, characterized in that: A through slot (401) is provided inside the support seat (4), the slide rod (5) passes through the through slot (401), a first through hole (402) is provided in the middle of the bottom end of the support seat (4), the first through hole (402) is connected to the through slot (401), and the first through hole (402) is adapted to the first locking column (15).

3. The metal sheet cutting device for producing trash cans according to claim 2, characterized in that: The mounting cylinder comprises a connecting cylinder (12) and a connecting column (13); the top end of the connecting column (13) is fixedly connected to the support seat (4); the bottom end of the connecting column (13) extends into the connecting cylinder (12), and the connecting column (13) and the connecting cylinder (12) are slidably matched; the top end of the first locking column (15) extends into the interior of the connecting column (13), and the first locking column (15) and the connecting column (13) are slidably matched; the bottom end of the connecting cylinder (12) is rotatably connected to the fixing seat (14).

4. The metal sheet cutting device for producing trash cans according to claim 3, characterized in that: A connecting plate (17) is rotatably mounted on the bottom end of the first locking column (15), and a first spring (16) is fixedly connected to the top end of the connecting plate (17). An adapting groove (1401) is provided at the bottom of the fixing seat (14), and the top end of the first spring (16) is fixedly connected to the top inner wall of the adapting groove (1401). The first spring (16) is sleeved on the first locking column (15).

5. The metal sheet cutting device for producing trash cans according to claim 4, characterized in that: A locking bolt (24) is threadedly mounted on the connecting cylinder (12), and one end of the locking bolt (24) is pressed against the outer wall of the connecting column (13).

6. The metal sheet cutting device for producing trash cans according to claim 1, characterized in that: The support plate (2) is provided with a slide groove (201), a slide seat (3) is slidably mounted in the slide groove (201), the support seat (4) is fixedly mounted on the bottom end of the slide seat (3), the connecting shaft (10) passes through the slide seat (3), and the connecting shaft (10) and the slide seat (3) are rotatably matched.

7. The metal sheet cutting device for producing trash cans according to claim 1, characterized in that: The cutting mechanism comprises a mounting box (7), a motor (8) and a cutting wheel (9); the mounting box (7) is fixedly mounted on the bottom end of the connecting member (6); the motor (8) is fixedly mounted inside the mounting box (7); and the cutting wheel (9) is fixedly mounted on the output end of the motor (8).

8. The metal sheet cutting device for producing trash cans according to claim 1, characterized in that: The driving mechanism comprises a slide column (21), a support ring (20), a second spring (22) and a pedal (23); support rings (20) are fixedly mounted on both sides of the cutting table (1); the slide column (21) passes through the support ring (20), and the slide column (21) and the support ring (20) are slidably matched; the top end of the slide column (21) is fixedly connected to the end of the support plate (2); the top end of the support ring (20) is fixedly connected to the second spring (22); the top end of the second spring (22) is fixedly connected to the end of the support plate (2); and the bottom end of the slide column (21) is fixedly connected to the pedal (23).

9. The metal sheet cutting device for producing trash cans according to claim 5, characterized in that: A connecting seat (18) is fixedly mounted on both sides of the connecting cylinder (12), a second locking column (19) is fixedly mounted on the top of the connecting seat (18), and a second through hole (403) is opened on both sides of the bottom of the supporting seat (4), the second through hole (403) is connected to the through groove (401), and the second through hole (403) is adapted to the second locking column (19).

10. A method for cutting metal sheets for producing trash cans, using a metal sheet cutting device for producing trash cans as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the metal sheet to be cut on the workbench; S2. When cutting a circular surface, the support seat (4) is moved to the center of the circular surface by moving the hand wheel (11), and then the position of the cutting mechanism is adjusted by sliding the slide bar (5), thereby adjusting the cutting radius. Then, the support plate (2) is driven downward by the driving mechanism so that the fixed seat (14) contacts the top wall of the metal sheet to be cut. At the same time, when the support plate (2) moves downward, the top end of the first locking column (15) extends into the interior of the support seat (4) to lock the slide bar (5). Moreover, when the support plate (2) moves downward, the cutting mechanism is driven downward by the support seat (4), the slide bar (5) and the connecting member (6) to cut the metal sheet to be cut. During the cutting process, the hand wheel (11) is controlled to rotate, thereby driving the support seat (4) to rotate through the connecting shaft (10), so that the cutting mechanism rotates in a circular trajectory to cut a circular surface on the metal sheet to be cut. S3. When cutting a straight line, after the support plate (2) is driven downward by the driving mechanism, the support seat (4) is caused to slide along the length direction of the support plate (2) by pulling the hand wheel (11), so that the cutting mechanism slides along the straight line, thereby performing a straight line cutting on the metal plate to be cut.

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