Laser cutting machine special for refrigerator metal plate shell and cutting method

Abstract

The invention relates to the technical field of laser cutting equipment, and discloses a laser cutting machine special for a refrigerator metal plate shell and a cutting method.The laser cutting machine comprises a base frame, a supporting frame is arranged on the base frame, a laser cutting machine body is arranged below the supporting frame, and a fixed clamp and a movable clamp are arranged on the supporting frame; a refrigerator metal plate shell is arranged between the fixed clamp and the movable clamp, a limiting assembly is arranged in the supporting frame, and the movable clamp can be limited by the limiting assembly when moving downwards. Through interaction of a rotating gear cylinder, a first rack plate, a connecting rod and other structures in the limiting assembly and limitation of a limiting tooth block, the refrigerator metal plate shell between the fixed clamp and the movable clamp can be prevented from shaking and falling off, it is ensured that the position of the metal plate shell is stable in the cutting process, and the cutting precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting equipment, in particular to a laser cutting machine and a cutting method dedicated to a sheet metal shell of a refrigerator. Background Art

[0002] Sheet metal parts are products processed by sheet metal technology. We cannot live without sheet metal parts in our lives. At present, in the field of refrigerator manufacturing, the cutting and processing of sheet metal shells is an important link. As an important part of the refrigerator, the shape and size accuracy of the refrigerator sheet metal shell are required to be high to ensure the overall structure and appearance quality of the refrigerator. The traditional cutting method may have shortcomings in accuracy, efficiency and adaptability to sheet metal shells of different models and sizes. A cutting device that is efficient, accurate and adaptable to various sizes is needed for refrigerator sheet metal shells.

[0003] During the cutting process, how to stably fix the refrigerator sheet metal shell is one of the key issues. If the fixture cannot be effectively fixed, the shell will shake, affecting the cutting accuracy, and may even cause excessive cutting errors, making the product scrapped. Traditional fixtures may have problems such as loose fixation and poor adaptability to shells of different thicknesses. A fixture device that can reliably fix and adapt to refrigerator sheet metal shells of different thicknesses is needed to ensure the position of the shell during the cutting process. Summary of the invention

[0004] The object of the present invention is to provide a laser cutting machine and a cutting method for a refrigerator sheet metal shell, so as to solve the problems raised in the above-mentioned background technology.

[0005] Technical Solution

[0006] The present invention provides the following technical solution: a laser cutting machine dedicated to a refrigerator sheet metal shell, comprising a base frame, a support frame is arranged on the base frame, a laser cutting machine body is arranged below the support frame, a fixed clamp and a movable clamp are respectively arranged on the support frame, a refrigerator sheet metal shell is arranged between the fixed clamp and the movable clamp, a limiting component is arranged in the support frame, the movable clamp will be limited downward by the limiting component, hindering the movable clamp from moving downward, and preventing the refrigerator sheet metal shell from shaking and falling off between the fixed clamp and the movable clamp;

[0007] The limiting assembly includes a rotating gear cylinder, a first rack plate, a connecting rod and a limiting tooth block. The movable clamp drives the first rack plate and the connecting rod downward to make the rotating gear cylinder rotate in the reverse direction and be limited by the limiting tooth block.

[0008] Preferably, a limiting cavity is provided in the support frame, a first fixing column is fixedly installed in the limiting cavity, an L-shaped plate is movably installed on the outer side of the first fixing column, the edge of the L-shaped plate is fixedly connected to the limiting tooth block, a fixing cylinder is provided in the limiting cavity, a telescopic column is movably installed in the fixing cylinder, a second extrusion spring is provided on the outer side of the telescopic column, and the top of the telescopic column is fixedly connected to the first rack plate.

[0009] Preferably, a first extrusion spring is fixedly installed on the side of the L-shaped plate, a limit plate is movably installed inside the L-shaped plate, the limit plate is fixedly installed on the inner wall of the limit cavity, a hinge seat is fixedly installed on the outer side of the support frame, an extruded rod is arranged in the hinge seat, the shape of the extruded rod is L-shaped, a pushing block is fixedly installed on the short side of the extruded rod, and the pushing block is in contact with the L-shaped plate through an inclined surface.

[0010] Preferably, a screw, a first rotating column and a second rotating column are respectively provided in the base frame, and the outer sides of the screw and the first rotating column are connected to each other through a transmission belt. A cleaning plate is provided on the outer side of the screw, and the cleaning plate is located on the top surface of the base frame. The cleaning plate removes the residues generated when the laser cutting machine body cuts the sheet metal shell of the refrigerator.

[0011] Preferably, a telescopic cylinder and a collection box are provided in the base frame, the output shaft end of the telescopic cylinder is fixedly connected to the fixed tube, a through hole is opened on the base frame, and the cleaning plate pushes the welding residue into the collection box through the through hole to complete the collection.

[0012] Preferably, gear parts are provided on the outer sides of the first rotating column and the second rotating column, and the first tooth block part and the second tooth block part are provided on the outer sides of the fixed cylinder respectively, and the gear parts are meshed and connected with the first tooth block part and the second tooth block part respectively, the number of teeth of the first tooth block part is smaller than that of the second tooth block part, and the height of the first tooth block part is lower than that of the second tooth block part.

[0013] Preferably, the end of the second rotating column is meshedly connected with a transmission component, the top of the support frame is respectively provided with a third rotating column and a second rack plate, and a rotating gear is provided on the outer side of the third rotating column, and the rotating gear is meshedly connected with the second rack plate.

[0014] Preferably, a push rod is fixedly mounted on the side of the second rack plate, a bevel edge is provided at the end of the push rod, a bevel groove is provided on the squeezed rod, and the push rod engages the squeezed rod via the bevel edge and the bevel groove.

[0015] A cutting method for a refrigerator sheet metal shell using a laser cutting machine, comprising the following steps:

[0016] S1: The sheet metal shell of the refrigerator is placed on the base frame. During the upward movement of the telescopic cylinder, the fixed cylinder and the first rack plate are driven to move upward. The first rack plate clamps the sheet metal shell of the refrigerator through the movable clamp and the fixed clamp.

[0017] S2: When the fixed cylinder moves upward, it drives the cleaning plate and the laser cutting machine body to move to the other side. At the same time, the first rack plate on the fixed cylinder will contact the rotating gear cylinder, and the push rod and the squeezed rod will separate from each other. The squeezed rod will return to its original position and lose the squeeze on the L-shaped plate. The limit tooth block will contact the rotating gear cylinder, preventing the first rack plate from moving downward.

[0018] S3: As the telescopic cylinder moves downward, the telescopic cylinder drives the fixed cylinder to move downward, while the first rack plate is restricted by the limit tooth block and does not move downward. When the fixed cylinder moves downward, it drives the first rotating column and the second rotating column to rotate. The first rotating column drives the cleaning plate to clean the upper surface of the base frame. When the second rotating column rotates, it drives the laser cutting machine body to move through the transmission component and cuts the sheet metal shell of the refrigerator.

[0019] S4: As the laser cutting machine body moves, the pushing rod will come into contact with the squeezed rod, and the squeezed rod will push the L-shaped plate to rotate through the bevel groove and the bevel edge. The limiting tooth block loses its restriction on the first rack plate. Under the action of the second squeezing spring, the movable clamp will move down and drive the refrigerator sheet metal shell to move down to complete the cutting work.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present invention provides a laser cutting machine and cutting method for refrigerator sheet metal shell, which has the following beneficial effects:

[0022] 1. In the present invention, the sheet metal shell of the refrigerator can be stably clamped by the cooperation of the fixed clamp and the movable clamp. When the movable clamp moves downward, the rotating gear cylinder, the first rack plate, the connecting rod and other structures in the limit assembly interact with each other, and the restriction of the limit gear block can prevent the sheet metal shell of the refrigerator between the fixed clamp and the movable clamp from shaking and falling off, thereby ensuring the stable position of the sheet metal shell during the cutting process and improving the cutting accuracy.

[0023] 2. In the present invention, the cooperation of the squeezed rod, the pushing block, the L-shaped plate and other structures enables the contact between the pushing rod and the squeezed rod to drive the relevant structures to move when the laser cutting machine body is working, thereby realizing the separation of the limiting tooth block and the rotating gear cylinder, so that the movable clamp can drive the refrigerator sheet metal shell to move downward after the cutting is completed, which is convenient for unloading. At the same time, a good fixed connection state is maintained during the working process of the clamp to prevent the movable clamp from shaking.

[0024] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0025] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a rear view of the overall structure of the present invention;

[0028] Figure 2 It is a front view of the overall structure of the present invention;

[0029] Figure 3 A top view of the base frame of the present invention;

[0030] Figure 4 This is a front schematic diagram of the limiting cavity of the present invention;

[0031] Figure 5 It is a schematic diagram of the limiting cavity of the present invention;

[0032] Figure 6 It is a schematic diagram of the first gear portion and the second gear block portion on the fixed cylinder of the present invention;

[0033] Figure 7 This is a connection diagram of the first rotating column, the second rotating column and the fixed cylinder of the present invention;

[0034] Figure 8 It is a cross-sectional connection diagram of the fixed cylinder and the first rack plate of the present invention;

[0035] Fig. 9 This is a diagram of the rotating gear cylinder of the present invention being connected to the L-shaped plate through a limiting tooth block;

[0036] Fig.10 This is a schematic diagram of the passive operation of the squeezed rod of the present invention;

[0037] Fig.11 It is a schematic diagram of the pushing rod and the squeezed rod of the present invention.

[0038] Description of reference numerals:

[0039] In the figure: 1. base frame; 2. support frame; 3. cleaning plate; 4. fixing fixture; 5. movable fixture; 6. laser cutting machine body; 7. pushing rod; 8. squeezed rod; 9. telescopic cylinder; 10. screw; 11. first rotating column; 12. second rotating column; 13. fixing cylinder; 14. rotating gear cylinder; 15. first fixed column; 16. L-shaped plate; 17. first rack plate; 18. connecting rod; 19. first tooth block; 20. second tooth block; 21. first squeezing spring; 22. pushing block; 23. telescopic column; 24. second squeezing spring; 25. limiting plate; 26. transmission component; 27. third rotating column; 28. rotating gear; 29. ​​second rack plate; 30. hinge seat; 31. bevel groove; 32. bevel edge; 33. limiting tooth block. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example:

[0042] See also Figure 1-11 The present invention provides a technical solution: a laser cutting machine dedicated to refrigerator sheet metal shells, comprising a base frame 1, a support frame 2 is fixedly mounted on the base frame 1, a laser cutting machine body 6 is movably connected to the lower portion of the support frame 2 through a fixed plate, a fixed clamp 4 is fixedly mounted on the side wall of the support frame 2, a movable clamp 5 is movably mounted on the side wall of the support frame 2, and a sliding cavity for movement of the movable clamp 5 is opened in the side wall of the support frame 2, a connecting rod 18 and the movable clamp 5 move in the sliding cavity, a refrigerator sheet metal shell is arranged between the fixed clamp 4 and the movable clamp 5, a limiting assembly is arranged in the limiting cavity of the support frame 2, the movable clamp 5 will be restricted downward by the limiting assembly, thereby hindering the movable clamp 5 from moving downward, and preventing the refrigerator sheet metal shell from shaking and falling off between the fixed clamp 4 and the movable clamp 5.

[0043] The limiting assembly includes a rotating gear cylinder 14, a first rack plate 17, a connecting rod 18 and a limiting tooth block 33. The first rack plate 17 and the connecting rod 18 are fixedly connected. The connecting rod 18 is in a Z shape. The movable clamp 5 drives the first rack plate 17 and the connecting rod 18 downward to cause the rotating gear cylinder 14 to rotate in the opposite direction and be limited by the limiting tooth block 33.

[0044] In this embodiment, a first fixed column 15 is fixedly installed in the limiting cavity, and an L-shaped plate 16 is movably installed on the outer side of the first fixed column 15. The L-shaped plate 16 is slightly inclined near the side of the squeezed rod 8, and the pushing block 22 does not contact the side of the L-shaped plate 16 when it is not moving, leaving a gap. The edge of the L-shaped plate 16 is fixedly connected with the limiting tooth block 33, and the rotating gear cylinder 14 is located above the limiting tooth block 33. When the rotating gear cylinder 14 rotates forward, the limiting tooth block 33 will not hinder the rotating gear cylinder 14, and when the rotating gear cylinder 14 rotates reversely, the limiting tooth block 33 will mesh with the rotating gear cylinder 14 and hinder the rotation of the rotating gear cylinder 14. A fixed cylinder 13 is provided in the limiting cavity, and a telescopic column 23 is movably installed in the fixed cylinder 13. A second extrusion spring 24 is provided on the outer side of the telescopic column 23, and the top of the telescopic column 23 is fixedly connected with the first rack plate 17.

[0045] When the first rack plate 17 moves downward in the fixed cylinder 13, the first rack plate 17 can be kept stationary by the second extrusion spring 24 and the telescopic column 23, and the fixed cylinder 13 will move downward normally. When the fixed cylinder 13 moves downward, it will drive the first rotating column 11 and the second rotating column 12 to rotate normally, thereby driving the cleaning plate 3 to move and ensuring that the laser cutting machine body 6 can perform cutting work.

[0046] In this embodiment, a first extrusion spring 21 is fixedly installed on the side of the L-shaped plate 16, and a limit plate 25 is movably installed inside the L-shaped plate 16. The limit plate 25 is fixedly installed on the inner wall of the limit cavity. A hinge seat 30 is fixedly installed on the outer side of the support frame 2, and an extruded rod 8 is arranged in the hinge seat 30. The shape of the extruded rod 8 is L-shaped, and a pushing block 22 is fixedly installed on the short side of the extruded rod 8. The pushing block 22 is in contact with the L-shaped plate 16 through an inclined surface. The extruded rod 8 can be rotated through the hinge seat 30. When the extruded rod 8 rotates, the pushing block 22 will drive the pushing block 22 to contact the side of the L-shaped plate 16, and with the rotation of the extruded rod 8, the pushing block 22 will drive the L-shaped plate 16 to rotate around the first fixed column 15, and the limiting tooth block 33 can be rotated together, and the limiting tooth block 33 will be separated from the rotating gear cylinder 14, and the limiting position of the rotating gear cylinder 14 will be lost, so that the first rack plate 17 can move with the fixed cylinder 13.

[0047] After the movable clamp 5 drives the refrigerator sheet metal shell to move upward, the first tooth block portion 19 engages with the first rotating column 11, so that the movement of the cleaning plate 3 on the base frame 1 will not be hindered by the refrigerator sheet metal shell, and the cleaning plate 3 will work normally.

[0048] A lead screw 10 , a first rotating column 11 and a second rotating column 12 are respectively disposed in the base frame 1 , and the first rotating column 11 and the second rotating column 12 do not contact each other.

[0049] In this embodiment, gear parts are provided on the outer sides of the first rotating column 11 and the second rotating column 12, and the first tooth block part 19 and the second tooth block part 20 are respectively provided on the outer sides of the fixed cylinder 13. The gear parts are respectively meshed and connected with the first tooth block part 19 and the second tooth block part 20. The number of teeth of the first tooth block part 19 is less than that of the second tooth block part 20, and the height of the first tooth block part 19 is lower than that of the second tooth block part 20. When the fixed cylinder 13 starts to move up, the second rotating column 12 will first rotate through the second tooth block part 20, and drive the laser cutting machine body 6 to move to the other end through the transmission component 26. When the movement of the laser cutting machine body 6 is about to stop, the first tooth block part 19 on the fixed cylinder 13 will contact the first rotating column 13 and drive the first rotating column 13 to rotate. When the first rotating column 13 rotates, it will drive the screw 10 to rotate through the transmission belt. The number of thread turns on the screw 10 is small, and the screw 10 will quickly drive the cleaning plate 3 to move on the base frame 1 and move to the other end when it rotates.

[0050] When the fixing cylinder 13 does not start to move upward, the distance between the gear portion on the first rotating column 11 and the first tooth block portion 19 is the thickness of the cleaning plate 3. When the refrigerator sheet metal shell moves upward by a distance exceeding the thickness of the cleaning plate 3, the first rotating column 11 is meshed and connected with the first tooth block portion 19, thereby achieving the purpose of clamping and fixing different refrigerator sheet metal shells for cutting.

[0051] In this embodiment, the end of the second rotating column 12 is meshedly connected with a transmission component 26, and a third rotating column 27 and a second rack plate 29 are respectively provided at the top of the support frame 2. A rotating gear 28 is provided on the outer side of the third rotating column 27. The rotating gear 28 is meshedly connected with the second rack plate 29, and the bottom end of the second rack plate 29 is fixedly connected to the laser cutting machine body 6. When the second rack plate 29 moves, it will drive the laser cutting machine body 6 to move, thereby completing the cutting of the refrigerator sheet metal shell.

[0052] The transmission component 26 includes a bevel gear and a rotating shaft, both of which adopt the existing technology.

[0053] In this embodiment, a push rod 7 is fixedly installed on the side of the second rack plate 29, and a bevel edge 32 is provided at the end of the push rod 7. A bevel groove 31 is provided on the squeezed rod 8. The push rod 7 contacts the squeezed rod 8 through the bevel edge 32 and the bevel groove 31. When the laser cutting machine body 6 does not cut the refrigerator sheet metal shell, the push rod 7 has no contact with the squeezed rod 8. When the laser cutting machine body 6 is performing the cutting work, the push rod 7 will slowly contact with the squeezed rod 8, and drive the squeezed rod 8 to rotate around the hinge seat 30 through the bevel groove 31 and the bevel edge 32, so that the squeezed rod 8 will contact each other with the L-shaped plate 16, and drive the L-shaped plate 16 to rotate around the first fixed column 15, thereby causing the limiting tooth block 33 and the rotating gear cylinder 14 to separate from each other. After the laser cutting machine body 6 completes the cutting work, the movable clamp 5 will loosen the refrigerator sheet metal shell to facilitate the unloading of the refrigerator sheet metal shell after cutting.

[0054] The push rod 7 can passively drive the squeezed rod 8 through the inclined groove 31 and the inclined edge 32 to complete the fixed connection between the fixed clamp 4 and the movable clamp 5 to prevent the movable clamp 5 from shaking.

[0055] When the L-shaped plate 16 is pushed by the pushing block 22, the L-shaped plate 16 will stretch the first extrusion spring 21, and the limit plate 25 will limit the movement angle of the L-shaped plate 16 to prevent the L-shaped plate 16 from contacting the rotating gear cylinder 14 when rotating. Conversely, when the pushing block 22 and the L-shaped plate 16 lose contact, the L-shaped plate 16 will passively return to its original position under the action of the first extrusion spring 21.

[0056] The movement of the fixed cylinder 13 is achieved through the cooperation with the first rotating column 11 and the second rotating column 12, and the meshing connection between the first tooth block part 19 and the second tooth block part 20 on the outer side and the gear part, thereby realizing the orderly movement of the laser cutting machine body 6 and the cleaning plate 3.

[0057] When the fixed cylinder moves up 13, the second rotating column 12 first rotates through the second tooth block part 20 to drive the laser cutting machine body 6 to one end, and then the first tooth block part 19 contacts the first rotating column 11 to drive it to rotate, and then drives the cleaning plate to move through the screw 10. This collaborative working mode ensures the orderly progress of cutting and cleaning work and improves work efficiency.

[0058] The second rack plate 29 is fixedly connected to the laser cutting machine body 6, and through meshing with the third rotating column 27 and the rotating gear 28, the laser cutting machine body can move smoothly during the cutting process, thereby ensuring the accuracy of the cutting path.

[0059] In this embodiment, the screw 10 and the outer side of the first rotating column 11 are connected to each other through a transmission belt. A cleaning plate 3 is provided on the outer side of the screw 10. The cleaning plate 3 is located on the top surface of the base frame 1. The cleaning plate 3 cleans the residue generated by the laser cutting machine body 6 cutting the refrigerator sheet metal shell.

[0060] The screw 10 cooperates with the cleaning plate 3 so that during the cutting process, the screw 10 can drive the cleaning plate to move according to the working status of the equipment, and promptly remove the residues generated by the laser cutting machine body cutting the refrigerator sheet metal shell, keep the working area clean, and avoid the residues from having an adverse effect on the cutting work and equipment operation.

[0061] In this embodiment, a telescopic cylinder 9 and a collection box are provided in the base frame 1. The output shaft end of the telescopic cylinder 9 is fixedly connected to the fixed tube 13. A through hole is opened on the base frame 1. The cleaning plate 3 pushes the welding residue into the collection box through the through hole to complete the collection.

[0062] The working principle of this embodiment is as follows: when in use, the fixed cylinder 13 is first moved upward by moving the telescopic cylinder 9 upward, and when the fixed cylinder 13 moves upward, it will drive the first rack plate 17 to move upward together, and when the first rack plate 17 moves upward, it will drive the movable clamp 5 to move upward through the connecting rod 18, and when the movable clamp 5 moves upward, it will drive the refrigerator sheet metal shell to contact the fixed clamp 4, and complete the fixation of the refrigerator sheet metal shell.

[0063] When the fixed cylinder 13 moves upward, it will also drive the first rotating column 11 and the second rotating column 12 to rotate through the first tooth block portion 19 and the second tooth block 20 respectively. When the first rotating column 11 rotates, it will drive the cleaning plate 3 to move to the other side through the screw 10. At the same time, the second rotating column 12 will drive the laser cutting body 6 to move to the other side through the transmission component 26. At the same time, the pushing rod 7 and the squeezed rod 8 are separated from each other, and the L-shaped plate 16 will slowly return to its original position. When the movable clamp 5 cannot move, the fixing of the refrigerator sheet metal shell is completed.

[0064] When the telescopic cylinder 9 moves downward, the fixed cylinder 13 will move downward together. When the fixed cylinder 13 moves downward, the second rotating column 12 will be driven to rotate through the second tooth block part 20. During the second rotation, the laser cutting machine body 6 will be driven to cut the refrigerator sheet metal shell through the transmission component 26, the rotating gear 28 and the second rack plate 29. As the fixed cylinder 13 continues to move downward, the first rotating column 11 will be driven to rotate through the first tooth block part 19. When the first rotating column 11 rotates, it will drive the cleaning plate 3 to clean the upper surface of the base frame 1 again through the transmission belt and the lead screw 10. When the fixed cylinder 13 moves downward, the rotating gear cylinder 14 is blocked by the limiting tooth block 33, so that the first rack plate 17 cannot move. The first rack plate 17 will drive the second extrusion spring 24 to squeeze through the telescopic column 23, and at the same time will not hinder the fixed cylinder 13 from moving downward;

[0065] At the same time, as the cutting work of the laser cutting machine body 6 is carried out, the laser cutting machine body 6 will drive the pushing rod 7 to move toward the side of the squeezed rod 8 through the second rack plate 29 and the rotating gear 28, and make the squeezed rod 8 rotate around the hinge seat 30 through the bevel groove 31 and the bevel edge 32. At the same time, the squeezed rod 8 will contact the L-shaped plate 16 through the pushing block 22, so that the L-shaped plate 16 will rotate around the first fixed column 15, and the limiting tooth block 33 and the rotating gear cylinder 14 will be separated from each other, so that the first rack plate 17 will lose the squeezing force on the second squeezing spring 24, and the first rack plate 17 will drive the telescopic column 23 to retract into the fixed cylinder 13. At the same time, when the first rack plate 17 moves, it will drive the movable clamp 5 to move downward through the connecting rod 18, so that the movable clamp 5 will drive the refrigerator sheet metal shell to move downward, which is convenient for collecting the refrigerator sheet metal shell.

[0066] A cutting method for a refrigerator sheet metal shell using a laser cutting machine, comprising the following steps:

[0067] S1: The sheet metal shell of the refrigerator is placed on the base frame 1. The telescopic cylinder 9 drives the fixed cylinder 13 and the first rack plate 17 to move upward during the rising process. The first rack plate 17 clamps the sheet metal shell of the refrigerator through the movable clamp 5 and the fixed clamp 4;

[0068] S2: During the upward movement of the fixed cylinder 13, the cleaning plate 3 and the laser cutting machine body 6 are driven to move to the other side. At the same time, the first rack plate 17 on the fixed cylinder 13 will contact the rotating gear cylinder 14, and the push rod 7 and the squeezed rod 8 will separate from each other. The squeezed rod 8 will return to its original position and lose the squeeze on the L-shaped plate 16. The limiting tooth block 33 will contact the rotating gear cylinder 14, preventing the first rack plate 17 from moving downward;

[0069] S3: As the telescopic cylinder 9 moves downward, the telescopic cylinder 9 drives the fixed cylinder 13 to move downward, while the first rack plate 17 is restricted by the limit tooth block 33 and does not move downward. When the fixed cylinder 13 moves downward, it drives the first rotating column 11 and the second rotating column 12 to rotate. The first rotating column 11 drives the cleaning plate 3 to clean the upper surface of the base frame 1. When the second rotating column 12 rotates, it drives the laser cutting machine body 6 to move through the transmission component 26 and cut the refrigerator sheet metal shell.

[0070] S4: As the laser cutting machine body 6 moves, the pushing rod 7 will be driven to contact the squeezed rod 8, and the squeezed rod 8 will push the L-shaped plate 16 to rotate through the bevel groove 31 and the bevel edge 32. The limiting tooth block 33 loses the restriction on the first rack plate 17. Under the action of the second squeezing spring 24, the movable clamp 5 will move downward and drive the refrigerator sheet metal shell to move downward to complete the cutting work.

[0071] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A laser cutting machine for refrigerator sheet metal shells, comprising a base frame (1), a support frame (2) being arranged on the base frame (1), and a laser cutting machine body (6) being arranged below the support frame (2), characterized in that: The support frame (2) is provided with a fixed clamp (4) and a movable clamp (5) respectively, a refrigerator sheet metal shell is provided between the fixed clamp (4) and the movable clamp (5), and a limit assembly is provided in the support frame (2), the movable clamp (5) is limited downward by the limit assembly, thereby hindering the movable clamp (5) from moving downward, and preventing the refrigerator sheet metal shell between the fixed clamp (4) and the movable clamp (5) from shaking and falling off; The limiting assembly comprises a rotating gear cylinder (14), a first rack plate (17), a connecting rod (18) and a limiting tooth block (33); the movable clamp (5) drives the connecting rod (18) and the first rack plate (17) downward, causing the rotating gear cylinder (14) to rotate in the reverse direction and be limited by the limiting tooth block (33).

2. The laser cutting machine for refrigerator sheet metal shell according to claim 1, characterized in that: A limiting cavity is provided in the support frame (2), a first fixing column (15) is fixedly installed in the limiting cavity, an L-shaped plate (16) is movably installed on the outer side of the first fixing column (15), the edge of the L-shaped plate (16) is fixedly connected to the limiting tooth block (33), a fixing cylinder (13) is provided in the limiting cavity, a telescopic column (23) is movably installed in the fixing cylinder (13), a second extrusion spring (24) is provided on the outer side of the telescopic column (23), and the top end of the telescopic column (23) is fixedly connected to the first rack plate (17).

3. The laser cutting machine for refrigerator sheet metal shell according to claim 2, characterized in that: A first extrusion spring (21) is fixedly mounted on the side of the L-shaped plate (16); a limit plate (25) is movably mounted inside the L-shaped plate (16); the limit plate (25) is fixedly mounted on the inner wall of the limit cavity; a hinge seat (30) is fixedly mounted on the outer side of the support frame (2); an extruded rod (8) is arranged in the hinge seat (30); the extruded rod (8) is L-shaped; a push block (22) is fixedly mounted on the short side of the extruded rod (8); the push block (22) is in contact with the L-shaped plate (16) via an inclined surface.

4. The laser cutting machine for refrigerator sheet metal shell according to claim 3, characterized in that: A lead screw (10), a first rotating column (11) and a second rotating column (12) are respectively arranged in the base frame (1); the outer sides of the lead screw (10) and the first rotating column (11) are connected to each other via a transmission belt; a cleaning plate (3) is arranged on the outer side of the lead screw (10); the cleaning plate (3) is located on the top end surface of the base frame (1); and the cleaning plate (3) removes residues generated by the laser cutting machine body (6) cutting the sheet metal shell of the refrigerator.

5. The laser cutting machine for refrigerator sheet metal shell according to claim 4, characterized in that: A telescopic cylinder (9) and a collection box are provided in the base frame (1); an output shaft end of the telescopic cylinder (9) is fixedly connected to a fixed cylinder (13); a through hole is provided on the base frame (1); and the cleaning plate (3) pushes welding residues into the collection box through the through hole to complete collection.

6. The laser cutting machine for refrigerator sheet metal shell according to claim 4, characterized in that: The first rotating column (11) and the second rotating column (12) are both provided with gear parts on their outer sides, and the first tooth block part (19) and the second tooth block part (20) are respectively provided with the outer sides of the fixed cylinder (13). The gear parts are respectively meshed and connected with the first tooth block part (19) and the second tooth block part (20). The number of teeth of the first tooth block part (19) is smaller than that of the second tooth block part (20), and the height of the first tooth block part (19) is lower than that of the second tooth block part (20).

7. The laser cutting machine for refrigerator sheet metal shell according to claim 4, characterized in that: The end of the second rotating column (12) is meshedly connected with a transmission component (26), and the top of the support frame (2) is respectively provided with a third rotating column (27) and a second rack plate (29), and the outer side of the third rotating column (27) is provided with a rotating gear (28), and the rotating gear (28) is meshedly connected with the second rack plate (29).

8. The laser cutting machine for refrigerator sheet metal shell according to claim 7, characterized in that: A push rod (7) is fixedly mounted on the side of the second rack plate (29); a bevel edge (32) is provided at the end of the push rod (7); a bevel groove (31) is provided on the squeezed rod (8); and the push rod (7) squeezes the squeezed rod (8) through the bevel edge (32) and the bevel groove (31).

9. A cutting method of a laser cutting machine for refrigerator sheet metal shell, based on the laser cutting machine for refrigerator sheet metal shell according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The sheet metal shell of the refrigerator is placed on the base frame (1), and the telescopic cylinder (9) drives the fixed cylinder (13) and the first rack plate (17) to move upward during the ascending process, and the first rack plate (17) clamps the sheet metal shell of the refrigerator through the movable clamp (5) and the fixed clamp (4); S2: When the fixed cylinder (13) moves upward, the cleaning plate (3) and the laser cutting machine body (6) are driven to move to the other side. At the same time, the first rack plate (17) on the fixed cylinder (13) contacts the rotating gear cylinder (14), and the pushing rod (7) and the squeezed rod (8) are separated from each other. The squeezed rod (8) returns to its original position and loses the squeezing of the L-shaped plate (16). The limiting tooth block (33) contacts the rotating gear cylinder (14), thereby preventing the first rack plate (17) from moving downward. S3: As the telescopic cylinder (9) moves downward, the telescopic cylinder (9) drives the fixed cylinder (13) to move downward, while the first rack plate (17) is restricted by the limit tooth block (33) and does not move downward. When the fixed cylinder (13) moves downward, it drives the first rotating column (11) and the second rotating column (12) to rotate. The first rotating column (11) drives the cleaning plate (3) to clean the upper surface of the base frame (1). When the second rotating column (12) rotates, it drives the laser cutting machine body (6) to move through the transmission component (26) and cuts the sheet metal shell of the refrigerator. S4: As the laser cutting machine body (6) moves, the pushing rod (7) will be driven to contact the squeezed rod (8), and through the bevel groove (31) and the bevel edge (32), the squeezed rod (8) will push the L-shaped plate (16) to rotate, and the limiting tooth block (33) will lose the restriction on the first rack plate (17). Under the action of the second squeezing spring (24), the movable clamp (5) will move downward and drive the refrigerator sheet metal shell to move downward, completing the cutting work.

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