A method for root clearing of laser-cut bevels of H-shaped steel

Abstract

The application relates to a method for root clearing of laser-cut bevels of H-shaped steel, which comprises the following steps: S1. Clamp the H-shaped steel and determine the positions of the cross beam and the column; S2. Move the laser head to the processing position of the H-shaped steel through a moving member; S3. Plan the cutting trajectory of the laser head; S4. Use a focusing device to adjust the focus of the laser emitted by the laser head and perform cutting along the cutting trajectory planned in S3; S5. Use the focusing device again to perform root clearing treatment on the H-shaped steel. The present application has the effects of using laser cutting and adjusting the height of the laser head in the present invention.

Description

Technical Field

[0001] The present application relates to the field of laser processing, and particularly to a method for root cleaning of laser cutting bevels of H-shaped steel. Background Art

[0002] Currently, as shown in the attached Figure 1 figure, the H-shaped steel is a commonly used component in the steel structure industry. Among them, the I-beam crossbeam 1 needs to be welded after assembly to maintain structural stability. In actual production, the current traditional method is to cut U-shaped grooves 3 for installing shims 4 on the two end columns 2 of the I-beam, and then lay the shims flat in the U-shaped grooves 3 and connect the H-shaped steel with other components through welding.

[0003] Regarding the above related technology, for the cutting of the above U-shaped groove 3 in the traditional method, a hand-held flame gun is used for processing. However, there are a large number of residues at the root between the processed U-shaped groove 3 and the crossbeam 1, which directly causes the subsequent shims 4 to not be laid flat, reduces the contact area between the shims 4 and the U-shaped groove 3, leads to a reduction in the subsequent welding area, reduces the strength of this connection, and also reduces the connection stability. Therefore, a root cleaning cutting method for I-beams is needed to avoid the defect of reduced connection strength of shims caused by a large number of residues. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a method for root cleaning of laser cutting bevels of H-shaped steel by using laser cutting and adjusting the height of the laser head to change the focusing degree of the laser.

[0005] A method for root cleaning of laser cutting bevels of H-shaped steel provided by the present application adopts the following technical solutions:

[0006] S1. Clamp the H-shaped steel and determine the positions of the crossbeam and columns;

[0007] S2. Move the laser head to the processing position of the H-shaped steel through a moving member;

[0008] S3. Plan the cutting trajectory of the laser head;

[0009] S4. Use a focusing device to adjust the focus of the laser emitted by the laser head and perform cutting along the cutting trajectory planned in S3;

[0010] S5. Use the focusing device again to perform root cleaning treatment on the H-shaped steel.

[0011] As a further improvement of the present invention, the focusing device includes a housing, a connecting rod is installed in the housing, a fixed lens barrel is fixedly connected to the end of the connecting rod, and a plurality of sliding lens barrels are slidably connected to the rod body of the connecting rod. The degrees of the lenses in the sliding lens barrels are different; at least two sliding tracks are formed on the rod body of the connecting rod, the sliding lens barrels are arranged corresponding to the sliding tracks, and an adjusting electromagnet is fixedly connected to the side of the fixed lens barrel facing the sliding lens barrel. The adjusting electromagnet has a repulsive magnetic force on the sliding lens barrel and can change the magnitude of its own magnetic force; a replacement part is rotatably connected in the connecting rod. Each time the replacement part rotates, a different sliding lens barrel is aligned with the fixed lens barrel. A storage part that rotates synchronously with the replacement part is also provided at the end of the connecting rod away from the fixed lens barrel, and a storage cavity for placing the sliding lens barrel is formed on the storage part.

[0012] As a further improvement of the present invention, a conveyor belt is installed in one of the sliding tracks, the belt surface of the conveyor belt extends beyond the outer wall of the connecting rod, and a magnetic part that can be closely attached to the conveyor belt is integrally formed on the sliding lens barrel, and the conveyor belt can be magnetically connected to the magnetic part.

[0013] As a further improvement of the present invention, a positioning cavity for inserting the sliding lens barrel is formed on the replacement part, and a pressure sensor is provided at the bottom of the positioning cavity. When the sliding lens barrel contacts the pressure sensor, the replacement part and the storage part rotate simultaneously.

[0014] As a further improvement of the present invention, a liquid storage tank and a driving part in close contact with the liquid storage tank are fixedly installed in the storage part. The end of the driving part is provided with a chamfer and is located in the storage cavity. The sliding lens barrel can contact the driving part and extrude the driving part. Lubricating liquid is stored in the liquid storage tank, and the opening of the liquid storage tank is aligned with the sliding lens barrel.

[0015] As a further improvement of the present invention, a cavity is further formed at the end of the storage part, and a conduit is connected between the cavity and the inlet of the liquid storage tank.

[0016] As a further improvement of the present invention, an adsorption electromagnet is fixedly installed at the bottom of the storage cavity of the storage part. The adsorption electromagnet can magnetically connect the sliding lens barrel. When the adsorption electromagnet and the fixed lens barrel are on the same straight line, the adsorption electromagnet loses power. When the adsorption electromagnet and the fixed lens barrel are misaligned, the adsorption electromagnet is powered on.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. Adopting the laser cutting method can avoid the high temperature generated during the cutting with a flame gun and make the cut surface relatively flat and smooth;

[0019] 2. Use a computer to plan the movement trajectory and cutting trajectory of the laser head, facilitating the subsequent batch cutting of H-shaped steel;

[0020] 3. Have diverse choices for the focusing degree inside the laser head, making the selection range of the focusing degree of the laser head wider, and adapting to the production, cutting, and root cleaning of various different types and thicknesses of H-shaped steel. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the installation of H-shaped steel in the traditional method of the present invention.

[0022] Figure 2 It is a flowchart of the cutting method of the present invention.

[0023] Figure 3 It is a schematic diagram of the overall structure of the focusing adjustment component in the present invention.

[0024] Figure 4 It is a schematic diagram of the structure when the sliding lens barrel is replaced in the present invention.

[0025] Figure 5 It is a partial cross-sectional schematic diagram of the internal structure of the connecting rod in the present invention.

[0026] Figure 6 It is Figure 4 A magnified schematic diagram of the structure of part A in

[0027] Figure 7 It is Figure 5 A magnified schematic diagram of the structure of part B in

[0028] Figure 8 It is a schematic diagram of the structure of the sliding lens barrel in the embodiment of the present application.

[0029] Figure 9 It is a partial cross-sectional schematic diagram of the structure of the sliding lens barrel located in the sliding rail in the embodiment of the present application.

[0030] Reference Signs: 1, cross beam; 2, column; 3, shim; 4, U-shaped groove; 5, connecting rod; 6, fixed lens barrel; 7, sliding lens barrel; 8, sliding rail; 9, adjusting electromagnet; 10, replacement part; 11, storage part; 12, storage cavity; 13, conveyor belt; 14, magnetic part; 15, positioning cavity; 16, driving part; 17, liquid storage tank; 18, conduit; 19, cavity; 20, adsorption electromagnet; 21, parallel rod; 23, recessed groove; 24, lens frame; 25, extension block. Detailed Description of the Invention

[0031] The following will further elaborate on the present application in conjunction with the attached Figures 1-9 Drawings.

[0032] The embodiment of the present application discloses a method for root cleaning of laser-cut bevels of H-shaped steel. Refer to Figure 2 , a method for root cleaning of laser-cut bevels of H-shaped steel includes the following steps:

[0033] S1. Clamp the H-shaped steel and determine the positions of the cross beam 1 and the column 2. Usually, the H-shaped steel is transported by a conveyor belt and fixed and clamped by a specific robotic arm.

[0034] S2. Move the laser head to the processing position of the H-shaped steel through a moving member, so that the laser head will not collide with the cross beam 1 when moving horizontally at this height. The displacement device is any one of the three-dimensional moving devices in the prior art.

[0035] S3. Calculate the cutting trajectory of the laser head by a computer such as a computer with the ability to calculate orbits or draw pictures.

[0036] S4. Adjust the focus of the laser emitted by the laser head by a focusing device and perform cutting along the cutting trajectory planned in S3. After this cutting is completed, due to the relatively large thickness of the column 2 part of the H-shaped steel, the light spot is likely to deviate with the change of depth during the cutting process, resulting in a small amount of residue left at the cutting root.

[0037] S5. After cutting, the focusing device adjusts the light spot of the laser head to cut off the small amount of residue left at the inner root of the H-shaped steel, thus completing the cutting of a single H-shaped steel.

[0038] When cutting the next H-shaped steel, the laser head can be moved again through the displacement device to adjust its height, and the mechanical energy of the H-shaped steel can be batch-cut through the memory function of the computer.

[0039] Refer to Figure 3 , Figure 4 , which is a specific embodiment of the present invention. The focusing device in this embodiment includes a housing and components located inside the housing for adjusting the focusing degree of the laser. A connecting rod 5 is installed in the housing. The bottom of the connecting rod 5 is fixedly connected with a fixed lens barrel 6. A plurality of sliding lens barrels 7 are also slidably connected to the connecting rod 5. The sliding lens barrels 7 can slide up and down along the length direction of the connecting rod 5, and the degrees of the lenses in each sliding lens barrel 7 are different. Slide rails 8 with the same number as the sliding lens barrels 7 are also opened on the rod body of the connecting rod 5. In this embodiment, the number of slide rails 8 is set to four. An adjusting electromagnet 9 with adjustable magnetic size is fixedly connected to the side of the fixed lens barrel 6 facing the sliding lens barrel 7, and the sliding lens barrel 7 is made of a magnetic material, which is a magnet in the embodiment of the present application. The adjusting electromagnet 9 has a magnetic force for repelling the sliding lens barrel 7. When the magnetism of the adjusting electromagnet 9 increases, the distance between the sliding lens barrel 7 and the fixed lens barrel 6 increases; conversely, the distance between the sliding lens barrel 7 and the fixed lens barrel 6 decreases.

[0040] A replacement part 10 is also rotatably connected inside the connecting rod 5 near the fixed lens barrel 6. The replacement part 10 can rotate circumferentially with the center of the connecting rod 5 as the reference line. A positioning cavity 15 for inserting the sliding lens barrel 7 is formed inside the replacement part 10, and a pressure sensor is fixedly connected to the bottom of the positioning cavity 15. When the sliding lens barrel 7 falls into the positioning cavity 15 and contacts the pressure sensor, the pressure sensor will drive the replacement part 10 to rotate once, and the angle of each rotation of the replacement part 10 is 360°÷the number of sliding tracks 8. Whenever the replacement part 10 rotates once, the sliding lens barrel 7 with different degrees is aligned with the fixed lens barrel 6. When the adjusting electromagnet 9 loses power, the sliding lens barrel 7 just presses tightly against the pressure sensor and activates the pressure sensor.

[0041] Refer to Figure 4 、 Figure 5 and Figure 6 Also, a conveyor belt 13 is installed inside one of the sliding tracks 8. The conveyor belt 13 is located inside any one of the sliding tracks 8 that is not in the same straight line as the fixed lens barrel 6.

[0042] A magnetic part 14 is integrally formed on the entity where the sliding lens barrel 7 slides inside the sliding track 8, and the belt surface of the conveyor belt 13 is also magnetic and will be magnetically connected to the magnetic part 14. When the sliding lens barrel 7 enters the positioning cavity 15 and rotates to the sliding track 8 where the conveyor belt 13 is provided, the magnetic part 14 will contact and press tightly against the belt surface of the conveyor belt 13. At this time, the conveyor belt 13 drives the sliding lens barrel 7 to move away from the fixed lens barrel 6 through magnetic force.

[0043] Refer to Figure 4 、 Figure 5 and Figure 6, the sliding lens barrel 7 is composed of a lens frame 24 and an extension block 25 integrally formed with the lens frame. The magnetic member 14 is fixedly connected to the extension block 25. Concave grooves 23 for inserting both sides of the extension block 25 are also formed on both side walls of the sliding track 8. When the extension block 25 is located in the concave groove 23, the side surface of the extension block 25 is in close contact with the two inner groove surfaces of the concave groove 23. However, for the concave groove 23 formed on the sliding track 8 provided with the conveyor belt 13, the width of the groove opening is larger than that of other concave grooves 23. When the extension block 25 is located in the concave groove 24 formed on the sliding track 8 provided with the conveyor belt 13, the side surface of the extension block 25 will not be in close contact with the two inner groove surfaces of the concave groove 23. When the magnetic member 14 is in contact with the conveyor belt 13, the extension block 25 is located at the bottom of the conveyor belt 13. However, as the sliding lens barrel 7 moves, until the sliding lens barrel 7 moves to contact the conveyor belt 13, the extension block 25 will contact one side inner groove surface of the concave groove 23 and drive the sliding lens barrel 7 to move a small distance away from the connecting rod 5. At this time, the magnetic member 14 will be separated from the conveyor belt 13, and the two side surfaces of the extension block 25 will be in close contact with the belt surface of the conveyor belt 13 and the inner groove wall of the concave groove 23 respectively. With the continuous drive of the conveyor belt 13, the sliding lens barrel 7 will always move away from the replacement part 10 under the magnetic adsorption of the conveyor belt 13.

[0044] Refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , a storage member 11 is also rotatably connected to one end of the connecting rod 5 away from the fixed lens barrel 6. A parallel link is provided between the storage member 11 and the replacement part 10, and the parallel link 21 is rotated by a motor. The parallel link 21 and the motor are both located inside the connecting rod 5. The storage member 11 and the replacement part 10 are synchronously rotated through the parallel link 21.

[0045] A storage cavity 12 for placing the sliding lens barrel 7 is formed on the storage member 11. The number of the storage cavities 12 is the same as that of the sliding tracks 8 and is correspondingly arranged with the sliding tracks 8. When the sliding lens barrel 7 slides to the end of the conveyor belt 13 close to the storage member 11, the sliding lens barrel 7 is located at the bent part of the conveyor belt 13. An adsorption electromagnet 20 is also fixedly installed at the bottom of the storage cavity 12 of the storage member 11. The adsorption electromagnet 20 can magnetically connect the sliding lens barrel 7. When the sliding lens barrel 7 moves to be closest to the adsorption electromagnet 20, the magnetic force generated by the adsorption electromagnet 20 at this time is greater than the magnetic force adsorbed by the conveyor belt 13 on the sliding lens barrel 7, and the sliding lens barrel 7 will move from the conveyor belt 13 into the storage cavity 12.

[0046] The adsorption electromagnet 20 is also provided with a counter. Whenever the storage part 11 rotates once, the counter starts to count. When the count of the counter reaches a specific value, the adsorption electromagnet 20 loses power. The specific value set by this counter is the number of strips opened on the sliding rail 8.

[0047] Whenever the adsorption electromagnet 20 rotates to be in the same straight line as the fixed lens barrel 6, the count of the counter reaches the specific value. At this time, the adsorption electromagnet 20 loses power, and the sliding lens barrel 7 without the adsorption electromagnet 20 will maintain a certain distance from the fixed lens barrel 6 under the action of the adjustment electromagnet 9. And the staff can change the distance between the fixed lens barrel 6 and the sliding lens barrel 7 by adjusting the magnetic strength of the adjustment electromagnet 9.

[0048] When the adsorption electromagnet 20 rotates and is misaligned with the fixed lens barrel 6, the counter will be cleared and start counting again. At this time, the adsorption electromagnet 20 is powered on again, and under the action of the conveyor belt 13, it adsorbs and fixes the sliding lens barrel 7 that has moved into the storage cavity 12.

[0049] Refer to Figure 7 In the storage part 11, a liquid storage tank 17 and a driving part 16 closely attached to the liquid storage tank 17 are fixedly installed. The liquid storage tank 17 itself has elasticity and will deform when being squeezed. Lubricating liquid is stored in the liquid storage tank 17, and the opening of the liquid storage tank 17 is aligned with the sliding lens barrel 7. The end of the driving part 16 is provided with a chamfer and is located in the storage cavity 12. When the sliding lens barrel 7 can contact the driving part 16, the magnetic part 14 will squeeze the driving part 16. At this time, the lubricant in the liquid storage tank 17 will flow out from the opening of the liquid storage tank 17 under the action of the magnetic part 14 and lubricate the sliding lens barrel 7.

[0050] A cavity 19 is also opened at the end of the storage part 11. A conduit 18 is connected between the cavity 19 and the inlet of the liquid storage tank 17. After the lubricant in the liquid storage tank 17 decreases, the excess lubricating liquid in the cavity 19 will enter the liquid storage tank 17 to ensure that there is always sufficient lubricating liquid in the liquid storage tank 17 to lubricate the sliding lens barrel 7.

[0051] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A method for cleaning the groove of an H-beam by laser cutting, characterized in that: The following steps are involved: S1. Clamp the H-shaped steel and determine the positions of the crossbeam (1) and the column (2); S2, move the laser head to the processing position of the H-beam through the moving part; S3, planning the cutting trajectory of the laser head; S4, using a focusing device to adjust the focus of the laser emitted by the laser head and cutting along the cutting track planned in S3; S5. Use the focusing device again to perform root cleaning on the H-beam; The focusing device comprises a housing, a connecting rod (5) is mounted inside the housing, a fixed lens barrel (6) is fixedly connected to the end of the connecting rod (5), a plurality of sliding lens barrels (7) are slidably connected to the rod body of the connecting rod (5), and lenses in the sliding lens barrels (7) have different degrees; at least two sliding rails (8) are provided on the rod body of the connecting rod (5), the sliding lens barrels (7) are arranged correspondingly to the sliding rails (8), and an adjusting electromagnet (6) is fixedly connected to the side of the fixed lens barrel (6) facing the sliding lens barrel (7) 9), the adjusting electromagnet (9) has a repulsive magnetism to the sliding lens barrel (7) and can change its own magnetism; a replacement part (10) is rotatably connected inside the connecting rod (5), and each time the replacement part (10) rotates, a different sliding lens barrel (7) is aligned with the fixed lens barrel (6), and the end of the connecting rod (5) away from the fixed lens barrel (6) is also provided with a storage part (11) that rotates synchronously with the replacement part (10), and the storage part (11) is provided with a storage cavity (12) for placing the sliding lens barrel (7); A conveyor belt (13) is installed in the sliding rail (8), the belt surface of the conveyor belt (13) exceeds the outer wall of the connecting rod (5), and a magnetic part (14) capable of being closely attached to the conveyor belt (13) is integrally formed on the sliding lens barrel (7), and the conveyor belt (13) can be magnetically connected to the magnetic part (14); The replacement part (10) is provided with a positioning cavity (15) for inserting the sliding lens barrel (7), and a pressure sensor is provided at the bottom of the positioning cavity (15). When the sliding lens barrel (7) contacts the pressure sensor, the replacement part (10) and the storage part (11) rotate simultaneously.

2. The method for laser cutting groove cleaning of H-beam according to claim 1, characterized in that: A liquid storage tank (17) and a driving member (16) closely attached to the liquid storage tank (17) are fixedly installed in the storage member (11); an end of the driving member (16) is provided with a chamfer and is located in the storage cavity (12); the sliding lens barrel (7) is capable of contacting with the driving member (16) and squeezing the driving member (16); lubricating liquid is stored in the liquid storage tank (17); and an opening of the liquid storage tank (17) is aligned with the sliding lens barrel (7).

3. The method for laser cutting groove cleaning of H-beam according to claim 2, characterized in that: A cavity (19) is also provided at the end of the storage member (11), and a conduit (18) is connected between the cavity (19) and the inlet of the liquid storage tank (17).

4. The method for laser cutting groove cleaning of H-beam according to claim 1, characterized in that: An adsorption electromagnet (20) is also fixedly mounted on the bottom of the storage cavity (12) of the storage member (11). The adsorption electromagnet (20) can be magnetically connected to the sliding lens barrel (7). When the adsorption electromagnet (20) and the fixed lens barrel (6) are located on the same straight line, the adsorption electromagnet (20) loses power. When the adsorption electromagnet (20) and the fixed lens barrel (6) are misaligned, the adsorption electromagnet (20) is energized.

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