High-precision H-shaped steel laser processing method

Abstract

The invention relates to a high-precision H-shaped steel laser machining method. The method comprises the steps that S1, H-shaped steel is fixed through a supporting piece on a placement frame; s2, controlling a measuring piece to measure the distance between the laser range finders on the same side, and recording the distance as D; s3, two sets of laser range finders located on the upper side of the H-shaped steel and the next set of laser range finders start to work, the contact time of the laser range finders and the H-shaped steel is recorded, the distances are calculated, and the distances smaller than D obtained through calculation are recorded as D1 and D2; s5, after multiple groups of data are obtained, the obtained data are judged, and if the obtained data D1 and D2 are equal to D, the H-shaped steel does not deform at the position; if D1 or D2 is smaller than D, the upper side of the H-shaped steel side wing deforms; and S6, calculating the deformation angle and the deformation amplitude of the H-shaped steel at the position according to D1, D2, A1 and A2. The method has the effect of quickly calculating the angle of the H-shaped steel after deformation.

Description

Technical Field

[0001] The present application relates to the field of laser processing, and in particular to a high-precision H-beam laser processing method. Background Art

[0002] At present, in the traditional H-beam laser cutting process, a major challenge is how to deal with the irregular shape and size changes of the raw materials. Since H-beams may be deformed during production and transportation, there are deviations in size and shape between the actual workpiece and the design drawings. If the cutting process is carried out directly, these deviations will affect the dimensional accuracy and appearance quality of the final product.

[0003] In traditional methods, the existing H-beam angle deformation measurement method often adopts manual measurement. The results of manual measurement are prone to large errors and may be inaccurate and cannot meet the accuracy requirements. In addition, the setting of the correction force after deformation is mostly based on the workers' experience, which is mostly not accurate enough and cannot correct the deformed H-steel well. Summary of the invention

[0004] In order to be able to quickly calculate the angle and deformation amplitude of the H-beam after deformation, the present application provides a high-precision H-beam laser processing method.

[0005] This application provides a high-precision H-beam laser processing method, which adopts the following technical solution: A high-precision H-beam laser processing method comprises the following steps: S1. First, the technician controls the measuring device through the control end to measure the distance between the laser rangefinders on the same side, and halves the distance and records it as a fixed value D; then the length of the upper wing of the standard H-beam is recorded as A1, and the length of the lower wing is recorded as A2; S2. Place the H-shaped steel to be tested on a mounting frame and fix the H-shaped steel by supporting members on the mounting frame; S3, the two sets of laser rangefinders located on the upper side of the H-beam start working. The working laser rangefinders record the time from the laser starting from the laser rangefinder to the laser contacting the H-beam and calculate the distance. When the calculated distance is less than D, it is recorded as D1; S4, the two sets of laser rangefinders located at the lower side of the H-beam start working. The working laser rangefinders record the time from when the laser starts from the laser rangefinder to when the laser contacts the H-beam and calculate the distance. The calculated distance that is less than D is recorded as D2; S5. After obtaining multiple sets of data at different positions of the H-beam, the data are transmitted to the computer through the wireless signal transmission module, and the obtained data are judged. If the obtained data D1 and D2 are both equal to D, the H-beam has no deformation at this position; if D1 is less than D, the upper side of the flank of the H-beam is deformed; if D2 is less than D, the lower side of the flank of the H-beam is deformed; S6. Calculate the angle of deformation of the H-beam at this point based on D1, D2, A1 and A2; S7. Calculate the overall deformation size and deformation amplitude of the H-beam according to the lengths of D1 and D2 at different positions.

[0006] Optionally, a parallel piece is connected between adjacent push rods, a threaded hole is opened on the parallel piece, the ends of adjacent push rods are tightly attached to the parallel piece, and a screw inserted into the push rod is passed through the threaded hole.

[0007] Optionally, the measuring device includes a measuring rod and a laser rangefinder mounted on the measuring rod. There are two measuring rods located on the same side of the H-beam and are located at both ends of the side wings of the H-beam respectively. The same measuring rod linear array has two groups of laser rangefinders, and the side wing of the H-beam is located between the two groups of laser rangefinders.

[0008] Optionally, a servo motor is further provided between the same measuring rod, the servo motor is located between the two groups of laser rangefinders, both ends of the servo motor are fixedly connected with driving rods, the driving rods are threadedly connected to the servo motor, and the other end of the driving rods is rotatably connected to the measuring rod.

[0009] Optionally, warning lights are further installed on the measuring rod, the number of the warning lights is the same as the number of the laser rangefinders, and when the laser detector detects that the H-shaped steel is deformed, the warning lights light up.

[0010] In summary, the present application includes at least one of the following beneficial technical effects: 1. It can be calculated accurately to determine whether the H-beam is deformed during the production process, and the angle and amplitude of the deformation can be clearly calculated; 2. When the H-beam is found to be deformed, the warning light can be turned on or on continuously to remind the technicians of the specific situation of the H-beam deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a flow chart of the steps of the present invention.

[0012] Figure 2 It is a schematic diagram of the overall structure of the H-shaped steel located on the platform in an embodiment of the present application.

[0013] Figure 3It is a schematic diagram of the overall structure after the H-shaped steel is hidden in the embodiment of the present application.

[0014] Figure 4 It is a schematic diagram of the local structure highlighting the parallel parts in the embodiment of the present application.

[0015] Figure 5 It is a schematic diagram of the local structure of the servo motor and the driving rod in the embodiment of the present application.

[0016] Figure 6 It is a schematic diagram of the local structure of the laser rangefinder in the embodiment of the present application.

[0017] Figure 7 It is a calculation principle diagram of angle calculation in the embodiment of the present application.

[0018] Figure numerals: 1. Support member; 2. Platform; 3. Push rod; 4. Cylinder; 5. Parallel member; 6. Screw rod; 7. Measuring member; 8. Measuring rod; 9. Laser rangefinder; 10. Servo motor; 11. Driving rod; 12. Warning light; 13. H-shaped steel; 14. Cross bar; 15. Side wing. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-7 This application is described in further detail.

[0020] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] The present application discloses a high-precision H-beam laser processing method. Figure 1 , a high-precision H-beam laser processing method includes: S1. First, the technician controls the measuring piece through the control end to measure the distance between the laser rangefinders on the same side, and records the distance in half as a fixed value D; then records the length of the upper wing of the standard H-beam as A1, and the length of the lower wing as A2. After the measuring piece measures the distance between the laser rangefinders on the same side, the distance / 2 is recorded as the fixed value D; S2. Place the H-shaped steel to be tested on a mounting frame and fix the H-shaped steel by supporting members on the mounting frame; S3, the two sets of laser rangefinders located on the upper side of the H-beam start working. The working laser rangefinders record the time from the laser starting from the laser rangefinder to the laser contacting the H-beam and calculate the distance. When the calculated distance is less than D, it is recorded as D1; S4, the two groups of laser rangefinders 9 located at the lower side of the H-beam 13 start working, and the working laser rangefinders 9 record the time from when the laser starts from the laser rangefinder 9 to when the laser contacts the H-beam and calculate the distance, and the calculated distance less than D is recorded as D2; S5. After obtaining multiple sets of data at different positions of the H-beam, the data are transmitted to the computer through the wireless signal transmission module, and the obtained data are judged. If the obtained data D1 and D2 are both equal to D, the H-beam has no deformation at this position; if D1 is less than D, the upper side of the H-beam flank 15 is deformed; if D2 is less than D, the lower side of the H-beam flank 15 is deformed; S6. Calculate the angle of deformation of the H-beam at this point based on D1, D2, A1 and A2; S7. Calculate the overall deformation size and deformation amplitude of the H-beam according to the lengths of D1 and D2 at different positions.

[0023] Reference Figure 2 to Figure 7 A high-precision H-beam laser processing method includes a support member 1, which includes a platform 2 for erecting the H-beam and multiple push rods 3 and cylinders 4 installed on the platform 2. The piston rods of each group of cylinders 4 are fixedly connected to the push rods 3, and the adjacent push rods 3 on the platform 2 are aligned and contact each other. When the H-beam is deformed, the cross bar 14 of the H-beam is first placed above the platform 2. Then, by starting the cylinder 4, the cylinder 4 pushes the push rod 3 until the push rod 3 contacts the two side wings 15 of the H-beam. A pressure sensor is also provided on the side of the push rod 3 away from the cylinder 4. When the push rod 3 continues to move toward the side wing 15 of the H-beam, the pressure sensor will feel the pressure. When the pressure increases to a certain value, the pressure sensor will control the cylinder 4 to stop the piston rod of the cylinder 4. At this time, the contact of the push rod 3 with the H-beam fixes the H-beam.

[0024] A parallel rod is also provided between the multiple groups of push rods 3, and the two ends of the parallel member 5 are respectively in close contact with the two adjacent groups of push rods 3, and a threaded hole is also provided on the parallel member 5, through which a screw 6 that can be inserted into the push rod 3 passes. The multiple push rods 3 are relatively fixedly connected with the screw 6 through the parallel rod, so as to achieve the purpose of advancing and retreating together.

[0025] refer to Figure 2 to Figure 7 , a measuring piece 7 for detecting whether the side wing 15 of the H-beam is deformed is also provided on the side wing 15 of the H-beam. The measuring piece 7 includes a measuring rod 8 and a laser rangefinder 9 installed on the measuring rod 8. Two measuring rods 8 are respectively installed on the two side wings 15 of the H-beam, and two groups of laser rangefinders 9 are provided on the upper measuring rod 8. The laser rangefinders 9 of the same group are arranged in a linear array, and the side wing 15 of the H-beam is located between the two groups of laser rangefinders 9. The two measuring rods 8 located on the same side wing 15 of the H-beam are respectively located at the two ends of the side wing 15, and the laser heads of the laser rangefinders 9 on the two measuring rods 8 are arranged face to face.

[0026] refer to Figure 2 to Figure 7 A servo motor 10 capable of adjusting the distance between two groups of laser rangefinders 9 is also provided between a measuring rod 8. A driving rod 11 is connected to both sides of the servo motor 10. One end of the driving rod 11 is threadedly connected to the servo motor 10, and the other end of the driving rod 11 is rotatably connected to the measuring rod 8. When the technician starts the servo motor 10 to drive the two driving rods 11 to rotate simultaneously, the two driving rods 11 will respectively drive the two groups of laser rangefinders 9 to move toward or away from each other, so as to adapt to the H-shaped steel 13 of different thicknesses of the flank 15 or adjust the tightness of the deformation of the H-shaped steel 13. When the two groups of laser rangefinders 9 on the upper measuring rod 8 change, the distance between the two groups of laser rangefinders 9 on the lower measuring rod 8 will also change accordingly.

[0027] refer to Figure 2 to Figure 7 , the laser rangefinder 9 in the measuring rod 8 above the H-beam starts to work and emits laser. When the laser of the laser measuring instrument hits the H-beam, the laser measuring instrument stops working and records the time when the laser measuring instrument emits laser, and calculates the distance when the laser measuring instrument hits the object. If the distance recorded by the laser rangefinder 9 close to the cross bar 14 of the H-beam 13 is less than D, then this distance is recorded as D1, or if the distance recorded by the laser rangefinder 9 far away from the cross bar 14 of the H-beam 13 is recorded as D1. If the distance D1 measured by the laser rangefinder 9 is less than D, it means that the H-beam has been deformed at this time.

[0028] refer to Figure 2 to Figure 7, the laser rangefinder 9 in the measuring rod 8 below the H-beam starts to work and emits laser. When the laser of the laser measuring instrument hits the H-beam, the laser measuring instrument stops working and records the time when the laser measuring instrument emits laser, and calculates the distance when the laser measuring instrument hits the object. If the distance recorded by the laser rangefinder 9 close to the cross bar 14 of the H-beam 13 is less than D, then this distance is recorded as D2, or if the distance recorded by the laser rangefinder 9 far away from the cross bar 14 of the H-beam 13 is recorded as D2. If the distance D2 measured by the laser rangefinder 9 is less than D, it means that the H-beam has been deformed at this time.

[0029] refer to Figure 2 to Figure 7 , when D1 is less than D, the deformation angle of the upper flank 15 of the H-beam 13 can be calculated as cos (deformation angle) = (D-D1) / A1. Calculate the degree of the deformation angle. If D2 is less than D, the deformation angle of the lower flank 15 of the H-beam 13 can be calculated as cos (deformation angle) = (D-D2) / A2. Calculate the degree of the deformation angle. The larger the calculated deformation angle, the greater the amplitude of the deformation.

[0030] Reference Figure 1 A warning light 12 is also installed on the measuring rod 8. The number of the warning lights 12 is the same as the number of the laser rangefinders 9 and is arranged corresponding to the laser rangefinders 9. When the laser detector detects that the H-beam is deformed, the warning light 12 lights up. If the warning light 12 lights up continuously, it means that there is an obvious problem in the processing of the flank 15 of the H-beam 13 in this part.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision H-beam laser processing method, characterized in that The following steps are involved: S1. First, the technician controls the measuring unit (7) through the control end to measure the distance between the laser rangefinders (9) on the same side, and halves the distance to record as a fixed value D; then records the length of the upper wing (15) of the standard H-beam as A1, and the length of the lower wing (15) as A2; S2, placing the H-shaped steel to be tested on a mounting frame, and fixing the H-shaped steel by a support member (1) on the mounting frame; S3, the two groups of laser rangefinders (9) located on the upper side of the H-beam start working, and the working laser rangefinders (9) record the time from the laser starting from the laser rangefinder (9) to the time when the laser contacts the H-beam and calculate the distance. When the calculated distance is less than D, it is recorded as D1; S4, the two groups of laser rangefinders (9) located at the lower side of the H-beam (13) start to work, and the working laser rangefinders (9) record the time from the laser starting from the laser rangefinder (9) to the time when the laser contacts the H-beam and calculate the distance, and when the calculated distance is less than D, it is recorded as D2; S5. After obtaining multiple sets of data at different positions of the H-beam, the data are transmitted to the computer through a wireless signal transmission module, and the obtained data are judged. If the obtained data D1 and D2 are both equal to D, the H-beam has no deformation at this position; if D1 is less than D, the upper side of the H-beam side wing (15) is deformed; if D2 is less than D, the lower side of the H-beam side wing (15) is deformed; S6. Calculate the angle of deformation of the H-beam at this point based on D1, D2, A1 and A2; S7. Calculate the overall deformation size and deformation amplitude of the H-beam according to the lengths of D1 and D2 at different positions.

2. A high-precision H-beam laser processing method according to claim 1, comprising a support member (1), characterized in that: The support member (1) comprises a platform (2) and a plurality of push rods (3) and a cylinder (4) located on the end surface of the platform (2); the cylinder (4) pushes the push rod (3) to move in the direction of the H-shaped steel, and a pressure sensor is provided on the side of the push rod (3) away from the cylinder (4); the pressure sensor controls the movement of the cylinder (4).

3. A high-precision H-beam laser processing method according to claim 1, characterized in that: A parallel piece (5) is connected between adjacent push rods (3), and a threaded hole is provided on the parallel piece (5). The ends of the adjacent push rods (3) are tightly attached to the parallel piece (5), and a screw (6) inserted into the push rod (3) is passed through the threaded hole.

4. A high-precision H-beam laser processing method according to claim 1 or 2, characterized in that: The measuring member (7) comprises a measuring rod (8) and a laser rangefinder (9) mounted on the measuring rod (8). There are two measuring rods (8) and they are respectively located at two ends of the side wing (15) of the H-shaped steel. The same measuring rod (8) has two groups of laser rangefinders (9) in a linear array. Each group of laser rangefinders (9) is arranged in a linear array, and the side wing (15) of the H-shaped steel is located between the two groups of laser rangefinders (9).

5. A high-precision H-beam laser processing method according to claim 4, characterized in that: A servo motor (10) is also provided between the same measuring rod (8), and the servo motor (10) is located between the two groups of laser rangefinders (9). Both ends of the servo motor (10) are fixedly connected to driving rods (11), and the driving rod (11) is threadedly connected to the servo motor (10), and the other end of the driving rod (11) is rotatably connected to the measuring rod (8).

6. A high-precision H-beam laser processing method according to claim 4, characterized in that: The measuring rod (8) is also equipped with a warning light (12), the number of which is the same as the number of the laser rangefinder (9), and when the laser detector detects that the H-shaped steel is deformed, the warning light (12) lights up.

Images