Angle steel plasma cutting device and machining method thereof

Abstract

The invention belongs to the technical field of metal machining equipment, and particularly relates to an angle steel plasma cutting device and a machining method thereof.The angle steel plasma cutting device comprises a rust removal box, and conveying devices used for angle steel moving are arranged outside the two sides of the rust removal box; a first derusting mechanism and a second derusting mechanism which are used for derusting angle steel are arranged in the derusting box; before unequal angle steel is derusted, a first hydraulic cylinder drives derusting brush plates on a first telescopic pipe and a second telescopic pipe to move and is matched with derusting brush plates on a first telescopic rod and a second telescopic rod, so that the two sets of derusting brush plates are matched with the unequal angle steel in side length; angle steel with different thicknesses is derusted; according to the invention, all-directional rust removal treatment on angle steel with different thicknesses and unequal angles can be realized, the cutting efficiency can be effectively improved, the arc starting time is greatly shortened, the cutting speed is increased, the energy consumption and the equipment load are reduced while the working efficiency is improved, and a good foundation is provided for subsequent cutting.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing equipment, and particularly relates to an angle steel plasma cutting device and a processing method thereof. Background Art

[0002] Angle steel, commonly known as angle iron, is a long steel bar with two sides perpendicular to each other at an angle; angle steel is also divided into equal-angle steel and unequal-angle steel; in terms of storage, angle steel is usually stored linearly in a long strip shape. During the processing of angle steel, plasma cutting is a common cutting method; the plasma cutting device can use high temperature to cut the long angle steel into sections to meet different subsequent usage requirements.

[0003] Problems existing in the prior art: When angle steel is stored for a long time, its surface will be oxidized to generate a rust layer. The rust layer will increase the difficulty of the plasma arc penetrating the material, reducing the cutting speed. When the rust layer is uneven, the energy absorption and distribution of the plasma arc are also uneven, resulting in an uneven cutting surface, problems such as inconsistent incision width and increased surface roughness, affecting the cutting quality. To overcome the obstruction of the rust layer, it is necessary to increase the energy of the plasma arc, which means consuming more cutting gas and increasing the production cost. Summary of the Invention

[0004] The purpose of the present invention is to provide an angle steel plasma cutting device and a processing method thereof, which can achieve a full range of rust removal treatment for angle steel with different thicknesses and unequal angles, effectively improve the cutting efficiency, significantly shorten the arc starting time, accelerate the cutting speed, while improving the working efficiency, reducing the energy consumption and equipment load, and providing a good foundation for subsequent cutting.

[0005] The technical solutions adopted by the present invention are specifically as follows: An angle steel plasma cutting device includes a rust removal box, and conveying devices for the movement of angle steel are arranged on both outer sides of the rust removal box; A first rust removal mechanism and a second rust removal mechanism for rust removal of angle steel are arranged inside the rust removal box; Before rust removal of unequal-angle steel, the first hydraulic cylinder drives the rust removal brush plates on the first telescopic pipe and the second telescopic pipe to move, and cooperates with the rust removal brush plates on the first telescopic rod and the second telescopic rod to make the two groups of rust removal brush plates adapt to the side lengths of the unequal-angle steel; Before rust removal of angle steel with different thicknesses, the second hydraulic cylinder drives the second telescopic pipes on both sides to move, and at the same time, drives the second telescopic pipes to slide along the first sliding groove, so that the distance between the rust removal brush plates on the upper and lower sides of the angle steel adapts to its thickness; When the diagonal steel is to be derusted, the second motor drives the two groups of first telescopic tubes and the first telescopic rod to rotate, and the rust removal brush plate arranged on the surface of the first telescopic tube removes rust from the lower surface of the diagonal steel. The first telescopic tube drives the two groups of second telescopic tubes and the second telescopic rod to rotate through the cooperation of the sleeve and the limit rod, and the rust removal brush plate arranged on the surface of the first telescopic tube removes rust from the upper surface of the diagonal steel. One of the second telescopic rods drives the connecting rod to rotate, and slides back and forth in the limiting sliding groove through the limiting sliding block, driving the L-shaped rust removal plate to remove rust from the corner of the upper surface of the diagonal steel; A cutting mechanism is arranged on the conveying device and located on one side of the rust removal box.

[0006] The first rust removal mechanism comprises a first hydraulic cylinder arranged on both sides of the rust removal box, and the first hydraulic cylinder is arranged at a 45-degree angle with the inner side of the rust removal box, the output shaft of the first hydraulic cylinder is fixed with a fixed block, one side of the fixed block is provided with a first slide groove, a first slider is slidably installed inside the first slide groove, a second telescopic tube is arranged on the outer wall of the first slider, and a second telescopic rod is inserted inside the second telescopic tube; The outer wall of the fixed block is provided with a first telescopic tube on one side of the first slide groove, a first telescopic rod is inserted into the interior of the first telescopic tube, a plurality of limit grooves are equidistantly provided on the outer walls of the first telescopic tube and the second telescopic tube along the circumferential direction, and a limit guide rail matching the limit groove is provided on the outer walls of the first telescopic rod and the second telescopic rod, and a rust removal brush plate is provided on the limit guide rail, the outer walls of the first telescopic tube and the second telescopic tube; A second hydraulic cylinder is disposed on the inner top of the rust removal box, and a mounting rod rotatably connected to the second telescopic tube is fixed to the output shaft of the second hydraulic cylinder.

[0007] A tower-shaped seat is provided at the bottom of the rust removal box, a second motor is provided on one side of the interior of the tower-shaped seat, and an output shaft of the second motor is transmission-connected to one end of the two first telescopic rods through a second bevel gear set; The interior of the fixed block is provided with an installation groove connected with the first sliding groove, the interior of the installation groove is provided with a sleeve, the outer wall of the sleeve is provided with a first fixing ear fixed to the first sliding block, the interior sliding of the sleeve is provided with a limit rod, the outer surface of the limit rod is provided with a limit protrusion along the circumferential direction, one end of the limit rod is provided with a third bevel gear set connected with the first telescopic tube, and one end of the sleeve is provided with a fourth bevel gear set connected with the second telescopic tube.

[0008] The second rust removal mechanism includes mounting ears arranged on both sides of the bottom of the mounting rod. A connecting plate is slidably mounted between both sides of the mounting ear. The bottom of the connecting plate is provided with an L-shaped rust removal plate adapted to the inner angle at the bottom of the angle steel. One end of one of the second telescopic rods is provided with a connecting rod. One end of the connecting rod is provided with a limiting slider. A reciprocating plate is fixed to the outer wall of the L-shaped rust removal plate. A limiting chute for slidably connecting with the limiting slider is formed in the outer wall of the reciprocating plate.

[0009] The cutting mechanism includes two fixing plates arranged on the conveying device. The bottoms of the two fixing plates are vertically arranged and adapted to the vertical sides at the bottom of the angle steel. One side of each of the two fixing plates is provided with a lead screw. A moving block is screwed onto the outer wall of the lead screw. The two moving blocks are sequentially arranged at the bottom and top of the two lead screws. One side of the moving block is provided with a mounting plate. One side of the mounting plate is provided with an electric slider. One side of the electric slider is provided with a plasma cutting head. An auxiliary blowing head for lateral blowing is arranged on the outer wall of the plasma cutting head. One side of the electric slider is provided with an infrared sensor for detecting the cutting surface of the angle steel. One end of each of the two lead screws extends below the fixing plate and is provided with a first bevel gear set for synchronous rotation of the two lead screws. A first motor is arranged on the outer wall of one of the fixing plates. The output shaft of the first motor is connected to the top end of the corresponding lead screw.

[0010] The dust suction mechanism includes a dust suction pump arranged on one side outside the rust removal box. A dust collection box connected to the dust outlet of the dust suction pump is arranged on the outer wall of the rust removal box. Inclined platforms are arranged on both inner sides of the bottom of the rust removal box. A cross plate is fixed between the interiors of the rust removal box and above the fixed block. A plurality of horn-shaped dust suction openings are arranged on the bottom of the cross plate and the inclined surfaces of the inclined platforms. The dust suction port of the dust suction pump is connected in series and communicated with the horn-shaped dust suction openings through a third dust suction pipe.

[0011] A first dust suction pipe is arranged at the bottom of the cross plate. The bottom end of the first dust suction pipe is provided with two connecting ears. A rotating block is rotatably mounted between the outer walls of the two connecting ears. A torsion spring is arranged at the rotational connection of the rotating block and the connecting ear. One side of the rotating block is provided with a second dust suction pipe. One end of the second dust suction pipe is provided with a dust suction nozzle adapted to the corner of the angle steel. The first dust suction pipe and the second dust suction pipe are both made of steel pipes. The first dust suction pipe is communicated with the third dust suction pipe.

[0012] The dust suction nozzle includes an inclined portion communicated with the second dust suction pipe. One side of the inclined portion is provided with a fitting portion adapted to the corner of the angle steel. One side of the bottom of the fitting portion is provided with a dust shoveling portion. The cross section of the dust shoveling portion is a right triangle, and a 30-degree chamfer is arranged on one side of the end.

[0013] L-shaped openings with equal sides are arranged on both the left and right sides of the rust removal box. Brush hairs for blocking the leakage of dust are arranged inside the L-shaped openings.

[0014] A processing method for an angle steel plasma cutting device, the specific steps are as follows: Step 1: The angle steel is placed on the conveying device, and the opening direction of the angle steel is automatically adapted by the double transmission rollers. The positioning extrusion wheel is adjusted by the hydraulic cylinder of the mobile auxiliary mechanism to realize the positioning and auxiliary transmission of the angle steel; Start the driving motor of the conveyor device, drive the transmission roller to rotate through the universal coupling and chain transmission, and use the vertical transmission roller in the conveyor device that is adapted to the angle steel to automatically position the transmission, so that the angle steel opening faces the preset direction; adjust the positioning extrusion wheel through the hydraulic cylinder of the mobile auxiliary mechanism, so that the pressure is stable during transmission and fixed when stopped; Step 2: The first hydraulic cylinder and the second hydraulic cylinder are started to make the rust removal brush plate adapt to the unequal angle steel side length and angle steel thickness, and the second motor is started to rotate the rust removal brush plate to remove the rust layer on the upper and lower surfaces of the angle steel. At the same time, the L-shaped rust removal plate vibrates to remove the rust layer on the bottom corner of the angle steel. Step 3: When removing rust, start the vacuum pump to collect debris through the trumpet vacuum ports on the horizontal plate and the inclined platform; the torsion spring drives the rotating block to make the vacuum nozzle of the second vacuum pipe fit the angle steel corner, and the dust shoveling part guides the debris into the fitting part and sucks it into the dust collection box through the inclined part; Step 4: The first motor drives the lead screw to rotate synchronously through the first bevel gear set, and the moving block drives the plasma cutting head to cut along the vertical edge of the angle steel; the infrared sensor detects the alignment status in real time to control the start and stop of the cutting, and the auxiliary blowing head blows sideways to maintain the arc stability and blow away the slag.

[0015] The technical effects achieved by the present invention are: The first rust removal mechanism provided in the present invention can realize all-round rust removal treatment of angle steels of different thicknesses and unequal sides by moving the rust removal brush plate through a hydraulic cylinder. The second rust removal mechanism is designed to be power-linked with the first rust removal mechanism, and no additional power source is required. The rotation of the second telescopic rod drives the L-shaped rust removal plate to vibrate, so as to carry out targeted rust removal on the hard-to-reach parts such as the bottom corner of the angle steel, which can significantly improve the cutting quality, avoid the problem of arc deviation during cutting, reduce the occurrence of irregular incisions, burrs and slag adhesion, etc., so that the incision accuracy of the cut angle steel is higher and the surface is smoother and flatter. At the same time, efficient rust removal treatment can also improve cutting efficiency, greatly shorten the arc starting time, speed up the cutting speed, and reduce energy consumption and equipment load while improving work efficiency, thereby providing a good foundation for subsequent cutting and avoiding cutting quality problems caused by rust layer.

[0016] The dust suction mechanism provided by the present invention combines a horn-shaped dust suction port with a special corner dust suction nozzle, and cooperates with a torsion spring to adaptively fit the change in the thickness of the angle steel. The dust shoveling part actively guides debris, effectively solves the problem of slag accumulation at the corner, avoids the diffusion of debris and dust, improves the working environment, and also prevents debris from affecting the subsequent cutting of the angle steel, thus improving the practicability of the equipment and the production continuity.

[0017] In the cutting mechanism provided by the present invention, two plasma cutting heads work simultaneously, and the cutting tasks on both sides of the angle steel can be completed at one time, doubling the cutting efficiency compared with single-head cutting; the infrared sensor real-time detects the alignment state between the plasma cutting head and the angle steel, precisely controls the start and stop of cutting, and ensures the cutting accuracy; the auxiliary blowing head blows air laterally to maintain the arc stability and effectively blow away the slag, making the cut surface of the angle steel after cutting more accurate and the surface smoother and flatter; at the same time, the heat input directions of the two plasma cutting heads are opposite, and the generated thermal stresses cancel each other out, reducing the bending or twisting deformation of the angle steel caused by unilateral high temperature. The two-way cutting makes the heat distribution more uniform, reduces the risk of local overheating, and avoids material hardening or uneven oxidation of the cut. Description of the Drawings

[0018] Figure 1 is the front view three-dimensional structure schematic diagram of the present invention; Figure 2 is the rear view three-dimensional structure schematic diagram of the present invention; Figure 3 is the structure schematic diagram of the conveying device of the present invention; Figure 4 is the internal structure schematic diagram of the rust removal box of the present invention; Figure 5 is the structure schematic diagram of the first rust removal mechanism of the present invention; Figure 6 is the internal structure schematic diagram of the fixing block of the present invention; Figure 7 is of the present invention Figure 5 enlarged structure schematic diagram of area A; Figure 8 is the structure schematic diagram of the cutting mechanism of the present invention; Figure 9 is the structure schematic diagram of the plasma cutting head of the present invention; Figure 10 is the structure schematic diagram of the dust suction head of the present invention.

[0019] In the drawings, the list of components represented by each reference numeral is as follows: 1. Rust removal box; 2. Mobile assistance mechanism; 3. Conveyor device; 4. Control panel; 5. Cutting mechanism; 51. Fixed plate; 52. Lead screw; 53. Moving block; 54. First bevel gear set; 55. Mounting plate; 56. Electric slider; 57. Plasma cutting head; 58. Auxiliary blowing head; 59. Infrared sensor; 510. First motor; 6. First rust removal mechanism; 61. First hydraulic cylinder; 62. Fixed block; 63. First telescopic tube; 64. First telescopic rod; 65. Second telescopic tube; 66. Second telescopic rod; 67. Limit groove; 68. Rust removal brush plate; 69. Tower-shaped seat; 610. Second motor; 611. First chute; 612. First slider; 613. First fixed ear; 614. Sleeve; 615. Limit rod; 616. Third bevel gear set; 617. Fourth bevel gear set; 618. Mounting rod; 619. Second hydraulic cylinder; 7. Second rust removal mechanism; 71. Mounting ear; 72. L-shaped rust removal plate; 73. Connecting plate; 74. Reciprocating plate; 75. Limit chute; 76. Connecting rod; 77. Limit slider; 8. Dust suction mechanism; 81. Inclined table; 82. Horn-shaped dust suction port; 83. Cross plate; 84. Dust suction pump; 85. Dust collection box; 86. First dust suction pipe; 87. Connecting ear; 88. Rotating block; 89. Second dust suction pipe; 810. Inclined part; 811. Fitting part; 812. Shoveling dust part; 9. L-shaped opening. Detailed implementation mode

[0020] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation modes of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0021] An angle steel plasma cutting device includes a rust removal box 1, and conveyor devices 3 for moving the angle steel are arranged on both outer sides of the rust removal box 1; As Figures 1 - 3 shown, the conveyor device 3 includes a bracket, and a plurality of drive rollers are symmetrically arranged on both sides of the bracket. The front and rear two drive rollers are vertically arranged and the foot is located below, and is adapted to the shape of the angle steel. The two ends of the bottom of the two drive rollers are connected by a universal coupling, and the plurality of drive rollers on the same side are connected by a chain. By driving one of the drive rollers to rotate by a motor, automatic positioning and conveying of the angle steel can be realized. During the conveying of the angle steel, its opening direction can be made to facilitate subsequent cutting; A moving auxiliary mechanism 2 adjusted by a hydraulic cylinder is arranged above the conveying device 3. The moving auxiliary mechanism 2 includes a positioning extrusion wheel arranged on a bracket. The positioning extrusion wheel is a double-cone wheel, and the inclined surface is arranged at forty-five degrees, which is convenient for the positioning extrusion wheel to adapt to the corner of the angle steel. The angle steel can be pressed and positioned without affecting the normal transmission of the angle steel, thereby improving the stability of the angle steel transmission. When the movement stops, the angle steel can also be well fixed, which is convenient for the subsequent cutting of the angle steel.

[0022] Example 1 like Figures 4 - 7 As shown, the interior of the rust removal box 1 is provided with a first rust removal mechanism 6 and a second rust removal mechanism 7 for comprehensively removing rust from the surface of the angle steel; A cutting mechanism 5 for cutting diagonal steel is arranged on the conveying device 3 and located on one side of the rust removal box 1 .

[0023] The first rust removal mechanism 6 includes a first hydraulic cylinder 61 arranged on both sides of the rust removal box 1, and the first hydraulic cylinder 61 is arranged at a forty-five degree angle with the inner side of the rust removal box 1, the output shaft of the first hydraulic cylinder 61 is fixed with a fixed block 62, a first slide groove 611 is opened on one side of the fixed block 62, a first slider 612 is slidably installed inside the first slide groove 611, a second telescopic tube 65 is arranged on the outer wall of the first slider 612, and a second telescopic rod 66 is inserted inside the second telescopic tube 65; the outer wall of the fixed block 62 is located on one side of the first slide groove 611 and is provided with a first telescopic tube 63, a first telescopic rod 64 is inserted inside the first telescopic tube 63, and a plurality of limiting grooves 67 are equidistantly arranged on the outer walls of the first telescopic tube 63 and the second telescopic tube 65 along the circumferential direction, and the outer walls of the first telescopic rod 64 and the second telescopic rod 66 are provided with limiting guide rails matching with the groove limiting grooves 67, and the limiting guide rails, the outer walls of the first telescopic tube 63 and the second telescopic tube 65 are all provided with rust removal brush plates 68; A second hydraulic cylinder 619 is disposed on the inner top of the rust removal box 1, and a mounting rod 618 rotatably connected to the second telescopic tube 65 is fixed to the output shaft of the second hydraulic cylinder 619; A tower-shaped seat 69 is provided at the bottom of the rust removal box 1, and a second motor 610 is provided on one side of the interior of the tower-shaped seat 69. The output shaft of the second motor 610 is transmission-connected to one end of the two first telescopic rods 64 through a second bevel gear set; a mounting groove connected to the first slide groove 611 is provided inside the fixed block 62, a sleeve 614 is provided inside the mounting groove, a first fixing ear 613 fixed to the first sliding block 612 is provided on the outer wall of the sleeve 614, a limiting rod 615 is slidingly provided inside the sleeve 614, a limiting protrusion is provided on the outer surface of the limiting rod 615 along the circumferential direction, a limiting guide groove is provided on the inner wall of the sleeve 614 for sliding connection with the limiting protrusion, a third bevel gear set 616 connected to the first telescopic tube 63 is provided at one end of the limiting rod 615, and a fourth bevel gear set 617 connected to the second telescopic tube 65 is provided at one end of the sleeve 614.

[0024] According to the above structure, before rust removal of the unequal-leg angle steel, the first hydraulic cylinder 61 is started. The first hydraulic cylinder 61 drives the fixed block 62 to move. The fixed block 62 drives the first telescopic tube 63 and the second telescopic tube 65 on the first slider 612 to move obliquely. The lengths of the two first telescopic tubes 63 and the second telescopic tube 65 extending out are controlled. The first telescopic tube 63 and the second telescopic tube 65 drive the rust-removing brush plates 68 on their surfaces to move obliquely, so that the rust-removing brush plates 68 on the telescopic tubes and the telescopic rods can be adapted to the side lengths of the unequal-leg angle steel; Before rust removal of angle steels with different thicknesses, the second hydraulic cylinder 619 is started. The second hydraulic cylinder 619 drives the two second telescopic rods 66 to move upward through the mounting rod 618. During the upward movement of the second telescopic rods 66, the second telescopic rods 66 will slide within the second telescopic tube 65. At the same time, one end of the second telescopic tube 65 slides along the first chute 611 through the first slider 612, so that when the second telescopic tube 65 and the second telescopic rods 66 move upward, they always remain parallel to the first telescopic tube 63 and the first telescopic rod 64, and the distance between the rust-removing brush plates 68 on its upper and lower sides is adjusted according to the thickness of the angle steel and is adapted to the thickness of the angle steel; With the cooperation of the provided limiting rod 615 and the sleeve 614, when the second telescopic tube 65 moves upward according to the thickness of the angle steel, it can drive the first slider 612 to move. The first slider 612 drives the sleeve 614 to move through the first fixed ear 613. With the cooperation of the third bevel gear set 616 and the fourth bevel gear set 617, the first telescopic tube 63 and the second telescopic tube 65 can be kept in driving connection, facilitating the normal progress of subsequent cutting work; When rust removal is carried out on the surface of the angle steel, the second motor 610 is started. The second motor 610 drives the first telescopic rods 64 that rotate synchronously on both sides through the second bevel gear set. Through the cooperation of the limiting groove 67 and the limiting guide rail, the first telescopic tube 63 is driven to rotate. The rotational movement of the first telescopic rods 64 and the first telescopic tube 63 drives the rust-removing brush plates 68 arranged on their surfaces to rotate, and rust removal treatment can be carried out on the lower surface of the angle steel. The first telescopic tube 63 drives the limiting rod 615 and the sleeve 614 to rotate through the third bevel gear set 616. The sleeve 614 drives the second telescopic tube 65 to rotate through the fourth bevel gear set 617. The second telescopic tube 65 cooperates with the limiting groove 67 and the limiting guide rail to drive the second telescopic rods 66 to rotate, driving the rust-removing brush plates 68 arranged on the surfaces of the second telescopic tube 65 and the second telescopic rods 66 to rotate, and rust removal is carried out on the upper surface of the angle steel. In cooperation with the second rust-removing mechanism 7, rust removal can be carried out at the corner of the upper surface of the angle steel; This structure is compact and ingenious, and the operation process is simple and convenient. It can realize the all-round rust removal treatment of angle steels with different thicknesses and unequal legs, improving the flexibility and versatility of the equipment use and effectively expanding the application range of the equipment; In practical applications, by optimizing the rust removal mechanism, the cutting quality can be significantly improved. Precise rust removal treatment avoids the problem of arc deviation during the cutting process, reduces the occurrence of phenomena such as irregular cut edges, burrs, and slag adhesion, making the cut edges of the angle steel after cutting more accurate, and the surface smoother and flatter. At the same time, efficient rust removal treatment can also improve the cutting efficiency, greatly shorten the arc starting time, accelerate the cutting speed, while improving the work efficiency, reducing energy consumption and equipment load; In addition, since the rust layer on the surface of the angle steel is completely removed, it effectively avoids the particles in the rust layer from splashing into the cutting nozzle during the cutting process, thus preventing problems such as nozzle blockage or electrode burnout, and reducing the equipment maintenance cost.

[0025] The second rust removal mechanism 7 includes mounting ears 71 provided on both sides of the bottom of the mounting rod 618. A connecting plate 73 is slidably mounted between both sides of the mounting ear 71. The bottom of the connecting plate 73 is provided with an L-shaped rust removal plate 72 that fits with the inner angle at the bottom of the angle steel. One end of one of the second telescopic rods 66 is provided with a connecting rod 76. One end of the connecting rod 76 is provided with a limit slider 77. A reciprocating plate 74 is fixed to the outer wall of the L-shaped rust removal plate 72. A limit chute 75 slidably connected to the limit slider 77 is provided on the outer wall of the reciprocating plate 74; According to the above, the L-shaped rust removal plate 72 on the mounting ear 71 can be driven to move up and down by the second hydraulic cylinder 619 in combination with the mounting rod 618, and can be adjusted according to the rear block of the angle steel. When rust removing the top corner of the angle steel, by rotating the second telescopic rod 66, the connecting rod 76 is driven to rotate. The connecting rod 76 drives the limit slider 77 to cooperate with the limit chute 75, driving the reciprocating plate 74 to reciprocate left and right, so that the L-shaped rust removal plate 72 vibrates accordingly, rust removing the right-angle corner of the angle steel, further improving the rust removal effect of the angle steel, making the rust removal of the angle steel more comprehensive, and improving the efficiency and quality of subsequent cutting of the angle steel; This structure can realize the linkage of the power with the first rust removal mechanism 6 without an additional power source, increasing the practicality of the equipment.

[0026] Embodiment 2 As Figures 8 - 9As shown in the figure, the cutting mechanism 5 includes two fixed plates 51 arranged on the conveying device 3. The bottoms of the two fixed plates 51 are vertically arranged and are adapted to the vertical sides of the bottom of the angle steel. One side of each of the two fixed plates 51 is provided with a lead screw 52. A moving block 53 is screwed onto the outer wall of the lead screw 52. The two moving blocks 53 are sequentially arranged at the bottom and top of the two lead screws 52. One side of the moving block 53 is provided with a mounting plate 55. One side of the mounting plate 55 is provided with an electric slider 56. One side of the electric slider 56 is provided with a plasma cutting head 57. The outer wall of the plasma cutting head 57 is provided with an auxiliary blowing head for lateral blowing. One side of the electric slider 56 is provided with an infrared sensor 59 for detecting the cutting surface of the angle steel. One end of the two lead screws 52 extends below the fixed plate 51 and is provided with a first bevel gear set 54 for the synchronous rotation of the two lead screws 52. The outer wall of one of the fixed plates 51 is provided with a first motor 510. The output shaft of the first motor 510 is connected to the top end of the corresponding lead screw 52; One side of the rust removal box 1 is provided with a control panel 4.

[0027] According to the above structure, the central processor inside the control panel 4 is electrically connected to the infrared sensor 59, the first motor 510 and the plasma cutting head 57 to realize the intelligent control of the cutting process. When cutting the angle steel by plasma, the first motor 510 is started. The first motor 510 drives one of the lead screws 52 to rotate. The lead screw 52 drives the other lead screw 52 to rotate through the first bevel gear set 54. The two lead screws 52 rotate synchronously. The lead screw 52 drives the moving block 53 to move. The moving block 53 drives the mounting plate 55 to move. The mounting plate 55 drives the plasma cutting head 57 to move. The two plasma cutting heads 57 move along the vertical side of the angle steel. During cutting, one plasma cutting head 57 cuts from the bottom corner of the angle steel to the edge, and the other plasma cutting head 57 cuts from the edge of the angle steel to the bottom corner. The auxiliary blowing head 58 provided on the plasma cutting head 57 is used to increase lateral blowing to avoid the possible accumulation of molten slag in front of the cutting path and improve the arc stability; The provided infrared sensor 59 is used to detect whether the plasma cutting head 57 is aligned with the angle steel during the cutting of the angle steel. When the infrared sensor 59 detects that the nozzle of the plasma cutting head 57 is aligned with the angle steel, the plasma cutting head 57 is controlled to work through the control panel 4. When the infrared sensor 59 detects that the nozzle of the plasma cutting head 57 is separated from the angle steel, the plasma cutting head 57 is controlled to stop working through the control panel 4, avoiding the situation where one plasma cutting head 57 has not completed the cutting while the other completed plasma cutting head 57 continues to work, increasing the practicability of the equipment; Two plasma cutting heads 57 work simultaneously, enabling the cutting task of both sides of the angle steel to be completed at one time. Compared with single-head cutting, the efficiency is nearly doubled. There is no need to repeatedly adjust the workpiece position or the cutting head direction, which is especially suitable for mass production and greatly reduces the non-processing time. The heat input directions of the two plasma cutting heads 57 are opposite, and the generated thermal stresses cancel each other out, reducing the bending or twisting deformation of the angle steel caused by high temperature on one side. The two-way cutting makes the heat distribution more uniform, reduces the risk of local overheating, and avoids material hardening or uneven cutting-edge oxidation. In addition, both the plasma cutting head 57 and the angle steel are inclined. When cutting obliquely, the gravity can be used to assist in discharging the slag, reducing the slag hanging at the bottom, allowing the slag to fall naturally under the influence of gravity, and reducing the need for additional gas blowing.

[0028] Embodiment 3 As Figure 3 and Figure 10 shown, the dust suction mechanism 8 includes a dust suction pump 84 arranged on one side outside the rust removal box 1. A dust collection box 85 connected to the dust outlet of the dust suction pump 84 is arranged on the outer wall of the rust removal box 1. Oblique platforms 81 are arranged on both inner sides of the bottom of the rust removal box 1. A cross plate 83 is fixed between the interiors of the rust removal box 1 and above the fixed block 62. A plurality of horn-shaped dust suction ports 82 are arranged on the bottom of the cross plate 83 and on the inclined surfaces of the oblique platforms 81. The dust suction port of the dust suction pump 84 is connected in series with the horn-shaped dust suction ports 82 through a third dust suction pipe. A first dust suction pipe 86 is arranged on the bottom of the cross plate 83. Two connecting ears 87 are arranged at the bottom end of the first dust suction pipe 86. A rotating block 88 is rotatably installed between the outer walls of the two connecting ears 87. A torsion spring is arranged at the rotational connection of the rotating block 88 and the connecting ears 87. A second dust suction pipe 89 is arranged on one side of the rotating block 88. A dust suction nozzle matching the corner of the angle steel is arranged at one end of the second dust suction pipe 89. Both the first dust suction pipe 86 and the second dust suction pipe 89 are made of steel pipes, and the first dust suction pipe 86 is communicated with the third dust suction pipe. The dust suction nozzle includes an inclined portion 810 communicated with the second dust suction pipe 89. A fitting portion 811 fitting the corner of the angle steel is arranged on one side of the inclined portion 810. A dust shoveling portion 812 is arranged at the bottom of one side of the fitting portion 811. The cross section of the dust shoveling portion 812 is a right triangle, and a 30-degree chamfer is arranged at one end. The fitting portion 811 is made of arc-shaped silica gel material.

[0029] According to the above structure, when cleaning the debris generated during the rust removal inside the rust removal box 1, start the dust suction pump 84. The dust suction pump generates suction, and sucks the dust and debris in the rust removal box 1 into the dust collection box 85 through the horn-shaped dust suction port 82 for collection. When the debris accumulates at the right-angle corner of the angle steel, due to the setting of the torsion spring, it drives the dust suction nozzle at the bottom of the second dust suction pipe 89 to clean it; the dust shoveling part 812 provided on the dust suction nozzle can drive the debris to contact the dust shoveling part 812 when the angle steel moves. The chamfer on one side of the vertical dust shoveling part 812 can be pushed by the subsequent debris into the fitting part 811, and concentrated in the fitting part 811, which is convenient for dust suction treatment, improves the dust suction effect and efficiency at the corner, and does not require the dust suction nozzle to move for dust suction; the cooperation of the set torsion spring and the rotating block 88 enables the dust shoveling part 812 to also contact the angle steel when the thickness of the angle steel changes, improves the practicability of the equipment and the cleaning effect of the debris, and avoids the debris from affecting the subsequent cutting of the angle steel; the efficient cleaning of the debris at the corner of the angle steel and the good adaptability to angle steels of different thicknesses avoid production interruptions caused by debris residue or equipment adaptation problems, and there is no need to frequently stop the machine for cleaning or adjust the equipment, which significantly improves the production continuity and processing efficiency of the angle steel rust removal operation.

[0030] Equilateral L-shaped openings 9 are provided on both the left and right sides of the rust removal box 1, and brush hairs for blocking the outward leakage of dust are provided inside the L-shaped openings 9.

[0031] According to the above structure, the rust removal operation can be carried out in a relatively sealed space, avoiding the diffusion of debris and dust, improving the working environment, and enhancing the practicability of the equipment.

[0032] A processing method for an angle steel plasma cutting device is as follows: Step 1, place the angle steel on the conveying device 3, automatically adapt the opening direction of the angle steel through the double driving rollers, and adjust the positioning and pressing wheels through the hydraulic cylinder of the moving auxiliary mechanism 2 to achieve the positioning and auxiliary transmission of the angle steel; Start the driving motor of the conveying device 3, drive the driving rollers to rotate through the universal coupling and chain drive, and use the vertical driving rollers in the conveying device 3 that are adapted to the angle steel to automatically position and convey, so that the opening of the angle steel faces the preset direction; adjust the positioning and pressing wheels through the hydraulic cylinder of the moving auxiliary mechanism 2 to ensure stable pressing during conveying and fixed positioning when stopped; Step 2, start the first hydraulic cylinder 61 and the second hydraulic cylinder 619 to adapt the rust removal brush plate 68 to the side length and thickness of the unequal-angle steel. Start the second motor 610 to rotate the rust removal brush plate 68 to remove the rust layer on the upper and lower surfaces of the angle steel. At the same time, the L-shaped rust removal plate 72 vibrates to remove the rust layer at the bottom corner of the angle steel; Step 3: When rust removal is carried out, start the dust suction pump 84, and collect debris through the horn-shaped dust suction ports 82 on the cross plate 83 and the inclined platform 81; the torsion spring drives the rotating block 88 to make the dust suction nozzle of the second dust suction pipe 89 fit the corner of the angle steel, and the dust shoveling part 812 guides the debris into the fitting part 811 and sucks it into the dust collection box 85 through the inclined part 810; Step 4: The first motor 510 drives the lead screw 52 to rotate synchronously through the first bevel gear set 54, and the moving block 53 drives the plasma cutting head 57 to cut towards each other along the vertical side of the angle steel; the infrared sensor 59 detects the alignment state in real time to control the start and stop of cutting, and the auxiliary blowing head 58 blows air laterally to maintain the stability of the arc and blow away the slag.

[0033] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented according to the conventional means in the art without special description and limitation.

Claims

1. An angle steel plasma cutting device, comprising a rust removal box (1), characterized in that: On both outer sides of the rust removal box (1), a conveying device (3) for the movement of angle steel is provided; Inside the rust removal box (1), a first rust removal mechanism (6) and a second rust removal mechanism (7) for removing rust from angle steel are provided; Before removing rust from unequal-angle steel, the first hydraulic cylinder (61) drives the rust removal brush plates (68) on the first telescopic pipe (63) and the second telescopic pipe (65) to move, and cooperates with the rust removal brush plates (68) on the first telescopic rod (64) and the second telescopic rod (66) to make the two groups of rust removal brush plates (68) adapt to the side lengths of the unequal-angle steel; Before removing rust from angle steel with different thicknesses, the second hydraulic cylinder (619) drives the second telescopic pipes (65) on both sides to move. At the same time, it drives the second telescopic pipes (65) to slide along the first chute (611) so that the distance between the rust removal brush plates (68) on the upper and lower sides of the angle steel adapts to its thickness; When removing rust from angle steel, the second motor (610) drives the two groups of first telescopic pipes (63) and the first telescopic rods (64) to rotate, and the rust removal brush plates (68) provided on their surfaces remove rust from the lower surface of the angle steel. The first telescopic pipe (63) drives the two groups of second telescopic pipes (65) and the second telescopic rods (66) to rotate through the cooperation of the sleeve (614) and the limit rod (615), and the rust removal brush plates (68) provided on their surfaces remove rust from the upper surface of the angle steel; One of the second telescopic rods (66) drives the connecting rod (76) to rotate. By reciprocatingly sliding the limit slider (77) in the limit chute (75), it drives the L-shaped rust removal plate (72) to remove rust from the corner of the upper surface of the angle steel; On the conveying device (3) and on one side of the rust removal box (1), a cutting mechanism (5) is provided.

2. The angle steel plasma cutting device according to claim 1, characterized in that: The first rust removal mechanism (6) includes first hydraulic cylinders (61) arranged on both inner sides of the rust removal box (1), and the first hydraulic cylinders (61) are arranged at a forty-five-degree angle with the inner side of the rust removal box (1). The output shaft of the first hydraulic cylinder (61) is fixed with a fixed block (62). A first chute (611) is opened on one side of the fixed block (62). A first slider (612) is slidably installed inside the first chute (611). The outer wall of the first slider (612) is provided with a second telescopic pipe (65). A second telescopic rod (66) is inserted inside the second telescopic pipe (65); On the outer wall of the fixed block (62) and on one side of the first chute (611), a first telescopic pipe (63) is provided. A first telescopic rod (64) is inserted inside the first telescopic pipe (63). A plurality of limit grooves (67) are equidistantly arranged along the circumferential direction on the outer walls of the first telescopic pipe (63) and the second telescopic pipe (65). Limit guide rails cooperating with the groove limit grooves (67) are provided on the outer walls of the first telescopic rod (64) and the second telescopic rod (66). Rust removal brush plates (68) are provided on the outer walls of the limit guide rails, the first telescopic pipe (63), and the second telescopic pipe (65); A second hydraulic cylinder (619) is provided on the inner top of the rust removal box (1). The output shaft of the second hydraulic cylinder (619) is fixed with a mounting rod (618) rotatably connected to the second telescopic pipe (65).

3. The angle steel plasma cutting device according to claim 1, wherein: At the bottom inside the rust removal box (1), there is a tower-shaped seat (69). On one side inside the tower-shaped seat (69), there is a second motor (610). The output shaft of the second motor (610) is drivingly connected to one end of two first telescopic rods (64) through a second bevel gear set; Inside the fixed block (62), there is an installation groove communicating with the first sliding groove (611). Inside the installation groove, there is a sleeve (614). On the outer wall of the sleeve (614), there is a first fixing ear (613) fixed to the first sliding block (612). Inside the sleeve (614), there is a limiting rod (615) slidably arranged. On the outer surface of the limiting rod (615), there are limiting protrusions arranged along the circumferential direction. One end of the limiting rod (615) is provided with a third bevel gear set (616) connected to the first telescopic tube (63). One end of the sleeve (614) is provided with a fourth bevel gear set (617) connected to the second telescopic tube (65).

4. A kind of angle steel plasma cutting device according to claim 1, characterized in that: The second rust removal mechanism (7) includes mounting ears (71) arranged on both sides of the bottom of the mounting rod (618). A connecting plate (73) is slidably mounted between both sides of the mounting ears (71). At the bottom of the connecting plate (73), there is an L-shaped rust removal plate (72) adapted to the inner corner of the bottom of the angle steel. One end of one of the second telescopic rods (66) is provided with a connecting rod (76). One end of the connecting rod (76) is provided with a limiting slider (77). On the outer wall of the L-shaped rust removal plate (72), there is a reciprocating plate (74). On the outer wall of the reciprocating plate (74), there is a limiting sliding groove (75) slidably connected to the limiting slider (77).

5. The angle steel plasma cutting device according to claim 1, characterized in that: The cutting mechanism (5) includes two fixing plates (51) arranged on the conveying device (3). The bottoms of the two fixing plates (51) are vertically arranged and adapted to the vertical sides of the bottom of the angle steel. On one side of each of the two fixing plates (51), there is a lead screw (52). A moving block (53) is screwed onto the outer wall of the lead screw (52). The two moving blocks (53) are sequentially arranged at the bottom and top of the two lead screws (52). On one side of the moving block (53), there is a mounting plate (55). On one side of the mounting plate (55), there is an electric slider (56). On one side of the electric slider (56), there is a plasma cutting head (57). On the outer wall of the plasma cutting head (57), there is an auxiliary blowing head for lateral blowing. On one side of the electric slider (56), there is an infrared sensor (59) for detecting the cutting surface of the angle steel. One end of each of the two lead screws (52) extends below the fixing plate (51) and is provided with a first bevel gear set (54) for synchronous rotation of the two lead screws (52). On the outer wall of one of the fixing plates (51), there is a first motor (510). The output shaft of the first motor (510) is connected to the top end of the corresponding lead screw (52).

6. The angle steel plasma cutting device according to claim 1, wherein: The dust suction mechanism (8) includes a dust suction pump (84) arranged on one side outside the rust removal box (1). A dust collection box (85) connected to the dust outlet of the dust suction pump (84) is arranged on the outer wall of the rust removal box (1). Inclined platforms (81) are arranged on both inner sides of the bottom of the rust removal box (1). A cross plate (83) is fixed between the interiors of the rust removal box (1) and above the fixed block (62). A plurality of horn-shaped dust suction ports (82) are arranged on the bottom of the cross plate (83) and on the inclined surfaces of the inclined platforms (81). The dust suction port of the dust suction pump (84) is connected in series with the horn-shaped dust suction ports (82) through a third dust suction pipe.

7. An angle steel plasma cutting device according to claim 6, characterized in that: A first dust suction pipe (86) is arranged on the bottom of the cross plate (83). Two connecting ears (87) are arranged at the bottom end of the first dust suction pipe (86). A rotating block (88) is rotatably installed between the outer walls of the two connecting ears (87). A torsion spring is arranged at the rotational connection between the rotating block (88) and the connecting ears (87). A second dust suction pipe (89) is arranged on one side of the rotating block (88). A dust suction nozzle matching the corner of the angle steel is arranged at one end of the second dust suction pipe (89). The first dust suction pipe (86) and the second dust suction pipe (89) are both made of steel pipes. The first dust suction pipe (86) is communicated with the third dust suction pipe.

8. An angle steel plasma cutting device according to claim 7, characterized in that: The dust suction nozzle includes an inclined portion (810) communicated with the second dust suction pipe (89). A fitting portion (811) fitting the corner of the angle steel is arranged on one side of the inclined portion (810). A dust shoveling portion (812) is arranged at the bottom of one side of the fitting portion (811). The cross section of the dust shoveling portion (812) is a right triangle, and a 30-degree chamfer is arranged on one side of the end.

9. The angle steel plasma cutting device according to claim 1, characterized in that: Equilateral L-shaped openings (9) are arranged on both the left and right sides of the rust removal box (1). Brush hairs for blocking the leakage of dust are arranged inside the L-shaped openings (9).

10. A processing method of an angle steel plasma cutting device, according to any one of the above-mentioned angle steel plasma cutting devices of claims 1-9, characterized in that, The specific steps are as follows: Step 1: Place the angle steel on the conveying device 3. Automatically adapt the opening direction of the angle steel through the double driving rollers. Adjust the positioning pressing wheel through the hydraulic cylinder of the moving auxiliary mechanism (2) to achieve the positioning and auxiliary transmission of the angle steel. Start the driving motor of the conveying device (3). Drive the driving roller to rotate through the universal coupling and chain drive. Automatically position and convey the angle steel by using the vertical driving roller adapted to the angle steel in the conveying device (3) so that the opening of the angle steel faces the preset direction. Adjust the positioning pressing wheel through the hydraulic cylinder of the moving auxiliary mechanism (2) to ensure stable pressing during conveying and fixed positioning when stopped. Step 2: Start the first hydraulic cylinder (61) and the second hydraulic cylinder (619) to adapt the rust removal brush plate (68) to the side length and thickness of the unequal-angle steel. Start the second motor (610) to rotate the rust removal brush plate (68) to remove the rust layer on the upper and lower surfaces of the angle steel. At the same time, the L-shaped rust removal plate (72) vibrates to remove the rust layer at the bottom corner of the angle steel. Step 3: When rust removal is started, start the dust suction pump (84), and collect debris through the horn-shaped dust suction ports (82) on the cross plate (83) and the inclined table (81); the torsion spring drives the rotating block (88) to make the dust suction nozzle of the second dust suction pipe (89) fit the corner of the angle steel, and the dust shoveling part (812) guides the debris into the fitting part (811), and is sucked into the dust collection box (85) through the inclined part (810); Step 4: The first motor (510) drives the lead screw (52) to rotate synchronously through the first bevel gear set (54), and the moving block (53) drives the plasma cutting head (57) to cut towards each other along the vertical side of the angle steel; the infrared sensor (59) detects the alignment state in real time to control the start and stop of cutting, and the auxiliary blowing head (58) blows air laterally to maintain the stability of the arc and blow away the slag.

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