A plasma cutting device for steel

Abstract

This invention discloses a plasma cutting device for steel, belonging to the technical field of plasma cutting equipment. It includes a frame, on which a truss manipulator and several support components are mounted. A plasma nozzle is mounted on the output end of the truss manipulator. Support shafts are rotatably connected to the frame, and several support tubes are interlocked to form receiving columns, with both ends of the receiving columns screwed to the corresponding support shafts. Support circular plates are interlocked with the support tubes, and the support circular plates are limited and fixed by the interlocked support tubes. The output end of a motor drives several support components, enabling the support circular plates, which are limited by the support tubes, to rotate synchronously. This invention, through a spring pin, limiting hole interlocking structure, and a split support tube design, combined with a locking mechanism using axially displaceable connecting columns, allows for independent disassembly and replacement of individual support circular plates. While maintaining overall support stability, it allows for selective maintenance of worn parts at any location.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting equipment technology, and more specifically, to a plasma cutting device for steel. Background Technology

[0002] Plasma arc cutting machines are machines that use plasma cutting technology to process metal materials. Plasma cutting uses the heat of a high-temperature plasma arc to melt the metal part or part of the workpiece at the cut, and uses the momentum of high-speed plasma to remove the molten metal to form a cut. It is commonly used for cutting and shaping metal plates or coils.

[0003] Existing plasma cutting equipment mostly uses crisscrossing support plates to support the workpiece during cutting. These support plates are often integrally welded structures, requiring replacement of the entire unit if a single support unit fails, resulting in high maintenance costs. Furthermore, the workpiece's position on the support plates needs to be manually adjusted, lacking flexibility. After prolonged plasma cutting operations, molten slag tends to adhere to the support plates, causing uneven plate heights. During plasma cutting, this can lead to interference and friction between the nozzle and the workpiece, resulting in workpiece misalignment. Therefore, we propose a plasma cutting device for steel. Summary of the Invention

[0004] The purpose of this invention is to provide a plasma cutting device for steel, which solves at least one of the above-mentioned technical problems.

[0005] This invention provides a plasma cutting device for steel, including a frame, a truss manipulator and several support components mounted on the frame, and a plasma nozzle mounted on the output end of the truss manipulator;

[0006] The support assembly includes two sets of support shafts and several support tubes. The support shafts are rotatably connected to the frame. Adjacent support shafts are driven by a chain. One support shaft is connected to the output end of the motor. Several support tubes are inserted into each other to form a support column and are limited by spring pins. The two ends of the support column are screwed to the corresponding support shaft.

[0007] Several supporting circular plates are inserted into and fitted with supporting tubes. The supporting circular plates are fixed by the interlocking supporting tubes.

[0008] The output of the motor drives several support components, enabling the support circular plate, which is limited by the support tube, to rotate synchronously.

[0009] As a further description of the above technical solution, it also includes several connecting columns, each of which includes a support column, a plurality of top blocks are fixedly installed on the support column, and a screw is fixedly installed at one end of the support column;

[0010] A fixing plate is fixedly installed inside the support tube. The top block passes through several support tubes and is fastened to one side of the fixing plate. The connecting column is locked to the support tube by screws.

[0011] As a further description of the above technical solution, a limiting block is fixedly installed inside the limiting tube at the end. The support column is provided with a guide groove and a limiting groove. The top block and the limiting groove are both located on the opposite side of the guide groove. The guide groove and the limiting groove are connected through a reversing groove. The limiting block can slide in the guide groove, the limiting groove and the reversing groove.

[0012] As a further description of the above technical solution, the distance between two adjacent top blocks is equal to the distance between the fixing plates of two adjacent support pipes.

[0013] As a further description of the above technical solution, a limiting hole is provided on the support tube, and a spring pin is inserted into the limiting hole of the adjacent support tube for limiting. The length of the limiting hole is greater than the pin head diameter of the spring pin.

[0014] As a further description of the above technical solution, the fixing plate is provided with a shaft hole, and a through hole is provided on one side of the shaft hole. The support column is inserted into the shaft hole, and the arc length of the connection between the shaft hole and the through hole is less than half of the circumference of the shaft hole.

[0015] As a further description of the above technical solution, the support tube includes a fixed tube and a limiting tube fixedly installed at one end of the fixed tube. Two adjacent support tubes are connected end to end by the limiting tube and the fixed tube. The support circular plate is slidably inserted into the limiting tube and is abutted and limited by two sets of fixed tubes.

[0016] As a further description of the above technical solution, the maximum height of several supporting circular plates is equal.

[0017] As a further description of the above technical solution, a positioning groove is provided on the support shaft, and the two ends of the receiving column are inserted into the positioning groove and fixed by bolts.

[0018] As a further description of the above technical solution, several crossbeams are fixedly installed on the frame, and scrapers are fixedly installed on the crossbeams. The scrapers are located directly below the support circular plate and in contact with the support circular plate, and are used to scrape off the slag on the support circular plate.

[0019] By adopting the above technical solution, the steel coil is placed on the support circular plate. The output end of the motor drives the support shaft and several interlocking support tubes to rotate through chain drive, thereby driving several support circular plates to rotate and convey the steel coil. After the steel coil is conveyed to the set position, the truss robot arm drives the plasma nozzle to move and perform plasma cutting of the steel coil to a certain size. After the cutting is completed, the output end of the motor controls the rotation of several support components and support circular plates through transmission to convey the formed or cut steel coil. When the support circular plates rotate, the slag attached to the end of the support circular plates is scraped off and cleaned by scraper blocks before it is completely hardened.

[0020] When the support circular plate is worn or severely damaged after long-term use and needs to be replaced, the positioning groove of the support shaft is rotated to face upward through the output end of the motor. The bolts that fix the support tube and the support shaft are removed, and a set of support components and the support circular plate on it are removed.

[0021] By unscrewing the nut on the screw, the screw is released from its locked state. Then, guided by the limit block, the limit block moves from the limit groove through the reversing groove into the guide groove. Then, the screw is pulled away from several support tubes. The pin head of the spring pin corresponding to the support plate to be disassembled is pressed out of the limit hole, and then the two sets of support tubes are separated, thereby realizing the disassembly of the support plate.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. This invention utilizes a spring pin-limiting hole insertion structure and a split support tube design, along with a locking mechanism using a axially displaceable connecting column, to enable independent disassembly and replacement of individual support discs. While maintaining overall support stability, it allows for selective maintenance of worn components at any location. Compared to traditional whole-component replacement methods, this significantly improves maintenance efficiency and reduces maintenance costs.

[0024] 2. This invention uses a carbide scraper design to clean the rotating support plate in real time during the steel coil conveying process, ensuring that the molten slag is peeled off before it is completely hardened, avoiding secondary adhesion and affecting the conveying and cutting accuracy.

[0025] 3. The connecting column of the present invention adopts a phase locking mechanism of top block-limiting groove, which realizes multi-point synchronous fixing of the support tube by 180° rotation locking. The guide groove-reversing groove transition design, combined with the positioning of the limiting block, reduces the difficulty of locking the connecting column and improves the locking efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a plasma cutting device for steel, as disclosed in a preferred embodiment of the present invention.

[0027] Figure 2This is a cross-sectional view of a plasma cutting device for steel disclosed in a preferred embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the distribution of support circular plates in a plasma cutting device for steel, as disclosed in a preferred embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of a support circular plate connection structure for a plasma cutting device for steel, disclosed in a preferred embodiment of the present invention.

[0030] Figure 5 A preferred embodiment of the present invention discloses a plasma cutting device for steel. Figure 2 Enlarged view of point A in the middle;

[0031] Figure 6 This is a schematic diagram of the top plate limiting mechanism of a plasma cutting device for steel, disclosed in a preferred embodiment of the present invention.

[0032] Figure 7 This is a schematic diagram of the installation position of the limiting block of a plasma cutting device for steel, disclosed in a preferred embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the guide groove position of a plasma cutting device for steel, disclosed in a preferred embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of a limiting groove for a plasma cutting device for steel, disclosed in a preferred embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the scraper installation of a plasma cutting device for steel, disclosed in a preferred embodiment of the present invention.

[0036] The following are the labeling instructions in the diagram: 1. Frame; 2. Truss robot; 3. Plasma nozzle; 4. Support assembly; 41. Support shaft; 42. Support tube; 421. Fixing tube; 422. Limiting tube; 423. Fixing plate; 424. Shaft hole; 425. Through hole; 43. Chain tooth; 45. Limiting hole; 46. Spring pin; 47. Positioning groove; 48. Connecting plate; 49. Limiting block; 5. Connecting column; 51. Support column; 52. Top block; 53. Guide groove; 54. Limiting groove; 55. Reversing groove; 56. Screw; 6. Support circular plate; 7. Crossbeam; 8. Mounting groove; 9. Scraper; 10. Motor. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Reference Figures 1 to 10 This embodiment discloses a plasma cutting device for steel, including a frame 1, a truss manipulator 2 installed on the frame 1, and a plasma nozzle 3 for cutting steel coils fixedly installed at the output end of the truss manipulator 2. In this embodiment, the truss manipulator 2 is set as a three-axis manipulator to control the spatial coordinates of the plasma nozzle 3 during operation. Several support components 4 are installed on the frame 1.

[0039] Reference Figures 3 to 7 The support assembly 4 includes two sets of support shafts 41 and several support tubes 42. The support shafts 41 are rotatably connected to the frame 1 and distributed on both sides of the frame 1. Two sets of chain teeth 43 are fixedly installed on the support shaft 41 on one side. The support shafts 41 of two adjacent support assemblies 4 on the same side are driven by the chain teeth 43 and the chain. One support shaft 41 is connected to the output end of the motor 10 fixedly installed on the frame 1, so that the output end of the motor 10 drives several support shafts 41 to rotate in the same direction.

[0040] The support tube 42 includes a fixed tube 421 and a limiting tube 422 fixedly installed at one end of the fixed tube 421. Two adjacent support tubes 42 are connected end to end by the limiting tube 422 and the fixed tube 421. The fixed tube 421 and the limiting tube 422 are non-circular cross-section tubes and can maintain relative rotation after insertion. A fixed plate 423 is fixedly installed inside the fixed tube 421. The fixed plate 423 has a shaft hole 424. A through hole 425 is opened on one side of the shaft hole 424. The support circular plate 6 is slidably inserted into the limiting tube 422 and is abutted and limited by two sets of fixed tubes 421. The maximum height of several support circular plates 6 is equal, thereby ensuring that the steel coil can be transported stably.

[0041] A limiting hole 45 is provided on the fixed tube 421, and a spring pin 46 is installed on the limiting tube 422. The spring pin 46 is inserted into the limiting hole 45 to limit the limiting tube 422 inserted into the fixed tube 421, preventing the two support tubes 42 from disengaging after insertion and maintaining the relative stability of the insertion. The length of the limiting hole 45 is greater than the pin head diameter of the spring pin 46, allowing for a certain amount of movement in the axial direction after the two sets of support tubes 42 are inserted.

[0042] Reference Figure 3 , Figure 5 and Figure 7A positioning groove 47 is provided on the support shaft 41. The limiting tube 422 at the end is inserted into the positioning groove 47 and fixed by a screw. That is, the width of the limiting tube 422 is equal to the width of the positioning groove 47. When the support shaft 41 rotates, the support tube 42 can rotate synchronously. A connecting plate 48 and a limiting block 49 are fixedly installed in the limiting tube 422 at the end. The limiting block 49 and the through hole 425 are located on the opposite side of the shaft hole 424.

[0043] Reference Figures 6 to 10 Several support tubes 42 are locked together by connecting columns 5. The connecting columns 5 include support columns 51, which are inserted into shaft holes 424. The arc length of the connection between the shaft hole 424 and the through hole 425 is less than half the circumference of the shaft hole 424, so that the shaft hole 424 can stably support the support column 51. Several top blocks 52 are fixedly installed on the support column 51. The top blocks 52 can pass through the through holes 425 on the fixing plate 423. The distance between two adjacent top blocks 52 is equal to the distance between the fixing plates 423 of two adjacent support tubes 42. The support column 51 is provided with guide grooves 53 and limiting grooves 54. On the support column 51, the top blocks 52 and the limiting grooves 54 are located on opposite sides of the guide grooves 53. The guide grooves 53 and the limiting grooves 54 are connected by reversing grooves 55. A screw 56 is fixedly installed at one end of the support column 51.

[0044] After the support column 51 passes through the fixing plate 423 and connecting plate 48 of several support tubes 42, it can be rotated 180 degrees so that the top block 52 can be fastened to one side of the fixing plate 423. The screw 56 is locked to the connecting plate 48 by the nut, so that the top block 52 can be pressed against the corresponding fixing plate 423, and several interlocking support tubes 42 can be fixed, reducing the risk of shaking of the support tubes 42.

[0045] When the support column 51 passes through the fixing plate 423 of several support tubes 42, the limiting block 49 can be inserted into the guide groove 53 to achieve stable guidance, reducing the difficulty of the support column 51 passing through the fixing plate 423. When the limiting block 49 abuts against the reversing groove 55, the support column 51 can be rotated. The limiting block 49 enters the limiting groove 54 from the reversing groove 55, and then the support column 51 is pulled in the opposite direction to achieve the abutment between the top block 52 and the fixing plate 423, which significantly reduces the difficulty of locking several support tubes 42.

[0046] When it is necessary to replace the damaged support plate 6, the support column 51 is pulled out of the support tube 42 to release the fixation of the support tube 42. Then, according to the position of the support plate 6 to be replaced, the corresponding spring pin 46 is pressed to control the support tube 42 to be released from the plugged state, so that the support plate 6 can be replaced. Moreover, during the replacement, the support tube 42 corresponding to the support plate 6 that does not need to be replaced is still in the plugged state, and the support plate 6 can be disassembled in a targeted manner, thereby further reducing the difficulty of subsequent installation of the support tube 42.

[0047] Reference Figure 2 and Figure 10 Several crossbeams 7 are fixedly installed on the frame 1. Several mounting slots 8 are formed on the crossbeams 7, and scraper blocks 9 are fixedly installed in the mounting slots 8. The scraper blocks 9 are located directly below and in contact with the supporting circular plate 6, and are used to scrape off the molten slag on the supporting circular plate 6, keeping the end face of the supporting circular plate 6 flat. The scraper blocks 9 are made of hard alloy or special ceramics, possessing high strength and high temperature resistance. When the steel coil is conveyed through the supporting circular plate 6, the molten slag adhering to the supporting circular plate 6 is peeled off by the action of the scraper blocks 9, thereby achieving real-time cleaning of the adhering molten slag and reducing the difficulty of cleaning caused by the molten slag hardening and bonding with the supporting circular plate 6 due to cooling.

[0048] Working principle: The steel coil is placed on the support circular plate 6. The output end of the motor 10 drives the support shaft 41 and several interlocking support tubes 42 to rotate through chain drive, thereby driving several support circular plates 6 to rotate and convey the steel coil. After the steel coil is conveyed to the set position, the truss robot 2 drives the plasma nozzle 3 to move and perform plasma cutting of the steel coil to a certain size. After the cutting is completed, the output end of the motor 10 controls several support components 4 and support circular plates 6 to rotate through transmission, and conveys the formed or cut steel coil. When the support circular plate 6 rotates, the slag attached to the end of the support circular plate 6 is scraped off and cleaned by the scraper 9 before it is completely hardened.

[0049] When the support plate 6 is worn or severely damaged after long-term use and needs to be replaced, the positioning groove 47 of the support shaft 41 is rotated to face upward by the output end of the motor 10, the bolts that fix the support tube 42 and the support shaft 41 are removed, and a set of support components 4 and the support plate 6 on it are removed.

[0050] By unscrewing the nut on the screw 56, the screw 56 is released from its locked state. Then, guided by the limiting block 49, the limiting block 49 moves from the limiting groove 54 through the reversing groove 55 into the guide groove 53. The screw 56 is then pulled away from several support tubes 42. The pin head of the spring pin 46 corresponding to the support plate 6 to be disassembled is pressed out of the limiting hole 45, and the corresponding two sets of support tubes 42 are separated, thus achieving the disassembly of the support plate 6. The installation process of the support plate 6 is the reverse of the above process, and will not be described further here.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plasma cutting device for steel, characterized in that: It includes a frame (1), on which a gantry manipulator (2) and several support components (4) are mounted. The output end of the gantry manipulator (2) is equipped with a plasma nozzle (3). The support assembly (4) includes two sets of support shafts (41) and several support tubes (42). The support shafts (41) are rotatably connected to the frame (1). Adjacent support shafts (41) are connected by chain drive. One support shaft (41) is connected to the output end of the motor (10). Several support tubes (42) are inserted into each other to form a support column and are limited by spring pins (46). The two ends of the support column are screwed and fixed to the corresponding support shafts (41). Several supporting circular plates (6) are inserted into and fitted with supporting tubes (42). The supporting circular plates (6) are fixed by the mutually inserted supporting tubes (42). It also includes several connecting columns (5), each connecting column (5) including a support column (51), a number of top blocks (52) are fixedly installed on the support column (51), and a screw (56) is fixedly installed at one end of the support column (51); A fixing plate (423) is fixedly installed inside the support tube (42). The top block (52) passes through several support tubes (42) and is fastened to one side of the fixing plate (423). The connecting column (5) is locked onto the support tube (42) by a screw (56). A limiting block (49) is fixedly installed inside the limiting tube (422) at the end. The support column (51) is provided with a guide groove (53) and a limiting groove (54). The top block (52) and the limiting groove (54) are both located on the opposite side of the guide groove (53). The guide groove (53) and the limiting groove (54) are connected through a reversing groove (55). The limiting block (49) can slide in the guide groove (53), the limiting groove (54) and the reversing groove (55). The support tube (42) includes a fixed tube (421) and a limiting tube (422) fixedly installed at one end of the fixed tube (421). Two adjacent support tubes (42) are connected end to end by the limiting tube (422) and the fixed tube (421). The support circular plate (6) is slidably inserted into the limiting tube (422) and abutted and limited by two sets of fixed tubes (421). The output end of the motor (10) drives several support components (4) to rotate synchronously, which enables the support circular plate (6) that is limited by the support tube (42).

2. The plasma cutting equipment for steel according to claim 1, characterized in that: The distance between two adjacent top blocks (52) is equal to the distance between the fixing plates (423) of two adjacent support tubes (42).

3. The plasma cutting equipment for steel according to claim 1, characterized in that: The support tube (42) has a limiting hole (45), and the spring pin (46) is inserted into the limiting hole (45) of the adjacent support tube (42) for limiting. The length of the limiting hole (45) is greater than the pin head diameter of the spring pin (46).

4. The plasma cutting equipment for steel according to claim 1, characterized in that: The fixing plate (423) has a shaft hole (424), and a through hole (425) is provided on one side of the shaft hole (424). The support column (51) is inserted into the shaft hole (424), and the opening width of the shaft hole (424) is less than half the diameter of the shaft hole (424).

5. The plasma cutting equipment for steel according to claim 1, characterized in that: The maximum height of several supporting circular plates (6) is equal.

6. The plasma cutting equipment for steel according to claim 1, characterized in that: The support shaft (41) is provided with a positioning groove (47), and the two ends of the receiving column are inserted into the positioning groove (47) and fixed by bolts.

7. A plasma cutting device for steel according to any one of claims 1-6, characterized in that: Several crossbeams (7) are fixedly installed on the frame (1), and scraper blocks (9) are fixedly installed on the crossbeams (7). The scraper blocks (9) are located directly below the support circular plate (6) and in contact with the support circular plate (6), and are used to scrape off the slag on the support circular plate (6).

Images