A laser cutting machine applied to a profile steel intelligent production line

Abstract

The application belongs to the technical field of hot cutting of metal materials, and particularly relates to a laser cutting machine applied to a profile steel intelligent production line, which comprises a machine body and a honeycomb workbench, a straightening mechanism for online self-adaptive straightening of incoming profile steel is fixedly installed at a feeding end of the machine body, the straightening mechanism comprises at least one set of self-adaptive straightening units, the self-adaptive straightening units comprise vertical straightening units and horizontal straightening units, pressure detection components are integrated in the vertical straightening units and the horizontal straightening units, a multi-degree-of-freedom linear driving mechanism is further fixedly installed at a top surface of the machine body, the feeding end is integrated with vertical and horizontal two-dimensional online straightening units, and deformation defects such as profile steel factory side bending, longitudinal bending and local warping can be eliminated, pressure sensors are built in the self-adaptive straightening units, a numerical control system automatically adjusts straightening strength according to real-time pressure, profile surface scratching caused by traditional rigid pressing structures is avoided, and profile steel feedstocks of different specifications and different deformation degrees are adapted.

Description

Technical Field

[0001] This invention belongs to the field of thermal cutting technology of metal materials, specifically relating to a laser cutting machine applied to an intelligent production line for profile steel. Background Technology

[0002] Section steel, including I-beams, channel steel, H-beams, and angle steel, is the core raw material for steel structure buildings, engineering machinery, and warehousing equipment manufacturing. On intelligent continuous production lines, laser cutting machines undertake key processes such as fixed-length cutting, beveling, and irregular-shaped cutting. The cutting accuracy and end-face flatness directly determine the subsequent assembly and welding quality.

[0003] In actual continuous feeding processing, the laser cutting equipment used in the existing intelligent steel production line generally has deformation defects such as side bending, longitudinal bending, and local warping in the incoming steel. The existing equipment only has simple guide wheels and fixed pressure wheels for rigid feeding at the feeding end, without a front-end online straightening structure. The bent steel directly enters the cutting station, which is very easy to produce defective products such as cutting size deviation, bevel angle deviation, and end face tilt.

[0004] For example, Chinese patent CN212823432U discloses "an automated laser cutting production line for profile cutting", which only sets up a conveyor roller and a clearance cutting station, but does not set up a front straightening mechanism. It cannot pre-correct the bent steel, and the deformation of the incoming material directly affects the cutting accuracy.

[0005] Chinese patent CN116748882A discloses "a laser tube cutting machine and cutting method applicable to the steel structure industry". The feeding end is only equipped with a limiting guide structure, relying on manual screening of bent profiles, without automated straightening function, and has poor adaptability to intelligent continuous production lines.

[0006] Chinese patent CN219724972U discloses "a profile cutting device" that uses fixed pressure rollers to press and convey profiles. It is a rigid pressing structure without pressure detection and adaptive adjustment functions, which easily damages the surface of the profiles and cannot adapt to steel profiles with different degrees of deformation.

[0007] To address the aforementioned problems, this invention proposes a laser cutting machine for use in intelligent production lines for structural steel. Summary of the Invention

[0008] To address the aforementioned problems in the existing technology, this invention provides a laser cutting machine for use in intelligent steel production lines, which features high cutting accuracy, high processing efficiency, and a high degree of automation.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting machine applied to a smart production line for profile steel, comprising a machine body and a honeycomb worktable fixed to the top surface of the machine body, wherein a straightening mechanism for online adaptive straightening of incoming profile steel is fixedly installed at the feeding end of the machine body, the straightening mechanism comprising at least one set of adaptive straightening units, wherein the adaptive straightening unit comprises a vertical straightening unit and a horizontal straightening unit; Both the vertical straightening unit and the horizontal straightening unit integrate pressure detection components; The top surface of the machine body is also fixedly installed with a multi-degree-of-freedom linear drive mechanism, and the moving end of the multi-degree-of-freedom linear drive mechanism is fixed with a cutting execution mechanism. A CNC box is fixed to the side of the machine body. The CNC box is electrically connected to the straightening mechanism, the multi-degree-of-freedom linear drive mechanism and the cutting execution mechanism respectively. The CNC box is configured to automatically adjust the straightening force of the vertical straightening unit and the horizontal straightening unit according to the real-time pressure signal of the pressure detection component. A waste collection mechanism is provided below the cellular workbench.

[0010] As a preferred embodiment of the present invention, the adaptive straightening unit further includes a base, two side plates symmetrically fixed to the top surface of the base, and a top plate fixed to the top of the two side plates, wherein a first guide sliding hole is provided on the side plate.

[0011] As a preferred embodiment of the present invention, the vertical straightening unit includes a horizontal fixed straightening roller, a first I-shaped slider, a second I-shaped slider, and a horizontal movable straightening roller; The transverse straightening roller is rotatably connected between two side plates, and the first I-shaped slider is slidably embedded in the first guide hole; The first I-shaped slider has a second guide hole, and the second I-shaped slider is slidably embedded in the second guide hole. The pressure detection component includes a first pressure sensor fixed to the top of the second I-shaped slider, and the first pressure sensor is electrically connected to the CNC box. The transverse moving straightening roller is rotatably connected between two second I-shaped sliders.

[0012] As a preferred embodiment of the present invention, a first adjusting mechanism is fixed on the top plate, the first adjusting mechanism including a connecting plate, a support column and a first cylinder; The connecting plate is located directly above the top plate, and the top end of the support column is rigidly fixed to the connecting plate, and the bottom end is rigidly fixed to the first I-shaped slider. The cylinder body of the first cylinder is fixed to the top of the top plate, and the piston rod of the first cylinder is rigidly fixed to the connecting plate.

[0013] As a preferred embodiment of the present invention, the transverse straightening unit includes two first C-shaped frames, two lower mounting shafts, two upper mounting shafts, two second C-shaped frames, and two longitudinal straightening rollers; The bottom end of the first C-shaped frame is rotatably connected to the base via a lower mounting shaft, and the top end is fixed with an upper mounting shaft. The upper mounting shaft is rotatably connected to the top plate via a first bearing seat. The second C-frame is fixed on the first C-frame, and the pressure detection assembly includes a second pressure sensor fixed between the second C-frame and the first C-frame, and the second pressure sensor is electrically connected to the CNC box; The longitudinal straightening roller is rotatably mounted inside the second C-frame.

[0014] As a preferred embodiment of the present invention, the adaptive straightening unit further includes a second adjustment mechanism, which includes a first synchronous pulley, a second synchronous pulley, a motor frame, a first rotating shaft, a servo motor, a third synchronous pulley, a first synchronous belt, a second rotating shaft, a second bearing seat, a fourth synchronous pulley, a first gear, a second synchronous belt, and a second gear. The first synchronous pulley and the second synchronous pulley are coaxially fixed on the upper mounting shaft at the top of one of the first C-shaped frames, and the second gear is coaxially fixed on the upper mounting shaft at the top of the other first C-shaped frame; The motor frame is fixed to the top of the top plate, and the first rotating shaft is rotatably connected between the motor frame and the top plate; The servo motor is fixed on the motor frame, and its output shaft is coaxially and fixedly connected to the first rotating shaft. The third synchronous pulley is coaxially fixed on the first rotating shaft, and the first synchronous belt is sleeved on the second and third synchronous pulleys; The second rotating shaft is rotatably connected to the top plate via the second bearing seat, and the fourth synchronous pulley is coaxially fixed on the second rotating shaft; The second synchronous belt is fitted onto the first and fourth synchronous pulleys; The first gear is coaxially fixed on the second rotating shaft and meshes with the second gear.

[0015] As a preferred embodiment of the present invention, the transverse straightening unit further includes a threaded rod and a locking nut; At least two of the threaded rods are evenly fixed to the second C-frame and pass through the first C-frame, and the locking nut is screwed onto the end of the threaded rod that extends out of the first C-frame.

[0016] As a preferred embodiment of the present invention, the multi-degree-of-freedom linear drive mechanism includes an X-axis linear module, a Y-axis linear module, and a Z-axis linear module; the cutting execution mechanism includes a fixed base, a laser head, a vision camera, a ring light source, and a negative pressure suction pipe. The two sets of X-axis linear modules are symmetrically fixed to the top of the machine body, the Y-axis linear module is fixed to the moving end of the X-axis linear module, and the Z-axis linear module is fixed to the moving end of the Y-axis linear module. The mounting base is fixed to the moving end of the Z-axis linear module, and the laser head is fixed to the mounting base; Both the vision camera and the ring light source are fixed on the mounting base and located on one side of the laser head, with the ring light source located directly below the vision camera; The negative pressure suction pipe is fixed on the mounting base with its suction port facing the cutting end of the laser head.

[0017] As a preferred technical solution of the present invention, an adjustable support mechanism for supporting the steel is fixed on the upper part of the machine body corresponding to the position of the honeycomb workbench. The adjustable support mechanism includes a support roller and a height adjustment mechanism. The height adjustment mechanism includes a mounting frame, a mounting rod, a first connecting arm, a cross shaft, a second connecting arm, and a second cylinder. The two mounting rods are symmetrically distributed and are rotatably mounted inside the machine body via a mounting bracket; Multiple first connecting arms are evenly spaced and their bottom ends are fixed to the mounting rod. The support roller is rotatably mounted between the top ends of two first connecting arms via a cross shaft. The bottom end of the second connecting arm is fixed to the mounting rod; The cylinder body of the second cylinder is hinged to the machine body, and its piston rod is hinged to the top of the second connecting arm.

[0018] As a preferred embodiment of the present invention, the waste collection mechanism includes a guide plate and a collection drawer; The two guide plates are symmetrically distributed and tilted and fixed below the honeycomb worktable, and the collection drawer is slidably embedded in the body and located below the two guide plates; The outer end of the collection drawer is fixed with a handle.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. The feeding end integrates a vertical and horizontal dual-dimensional online straightening unit, which can eliminate deformation defects such as side bending, longitudinal bending, and local warping of the steel at the factory, and avoid problems such as dimensional deviation, bevel angle deviation, and end face tilt caused by direct cutting of bent steel. 2. The adaptive straightening unit has a built-in pressure sensor, and the CNC system automatically adjusts the straightening force according to the real-time pressure, avoiding the scratches on the profile surface caused by the traditional rigid clamping structure. It is also suitable for steel profiles of different specifications and different degrees of deformation.

[0020] Other additional advantages and benefits of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the isometric structure of the straightening mechanism in this invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of the vertical straightening unit in the diagram; Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of the transverse straightening unit in the middle; Figure 5 This is an enlarged schematic diagram of the second adjusting mechanism in this invention; Figure 6 This is a schematic diagram of the isometric structure of the cutting actuator in this invention; Figure 7 This is an isometric structural diagram of the adjustable support mechanism in this invention; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of the height adjustment mechanism in the middle; Figure 9 This is an isometric structural diagram of the impurity collection mechanism in this invention.

[0022] In the diagram: 1. Body; 2. Honeycomb worktable; 3. Straightening mechanism; 31. Adaptive straightening unit; 311. Base; 312. Side plate; 3121. First guide slide hole; 313. Top plate; 314. Vertical straightening unit; 3141. Transverse fixed straightening roller; 3142. First I-shaped slider; 3143. Second guide slide hole; 3144. Second I-shaped slider; 3145. Transverse moving straightening roller; 3146. First pressure sensor; 315. Transverse straightening unit; 3151. First C-frame; 3152. Lower mounting shaft; 3153. Upper mounting shaft; 3154. First bearing seat; 3155. Second C-frame; 3156. Longitudinal straightening roller; 315 7. Threaded rod; 3158. Locking nut; 3159. Second pressure sensor; 316. First adjusting mechanism; 3161. Connecting plate; 3162. Support column; 3163. First cylinder; 317. Second adjusting mechanism; 3171. First synchronous pulley; 3172. Second synchronous pulley; 3173. Motor frame; 3174. First rotating shaft; 3175. Servo motor; 3176. Third synchronous pulley; 3177. First synchronous belt; 3178. Second rotating shaft; 3179. Second bearing seat; 3180. Fourth synchronous pulley; 3181. First gear; 3182. Second synchronous belt; 3183. Second gear; 4. Multi-degree-of-freedom linear drive mechanism; 41. X-axis linear module; 42. Y-axis linear module; 43. Z-axis linear module; 5. Cutting actuator; 51. Mounting base; 52. Laser head; 53. Vision camera; 54. Ring light source; 55. Negative pressure suction pipe; 6. CNC box; 7. Adjustable support mechanism; 71. Support roller; 72. Height adjustment mechanism; 721. Mounting frame; 722. Mounting rod; 723. First connecting arm; 724. Cross shaft; 725. Second connecting arm; 726. Second cylinder; 8. Collection mechanism; 81. Deflector; 82. Collection drawer; 83. Handle. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0024] This embodiment is based on the single-group adaptive straightening unit 31 model, which is suitable for cutting most conventional steel profiles.

[0025] like Figure 1As shown, this embodiment provides a laser cutting machine applied to a smart production line for profile steel, including a machine body 1, a honeycomb worktable 2, a straightening mechanism 3, a multi-degree-of-freedom linear drive mechanism 4, a cutting execution mechanism 5, a CNC box 6, an adjustable support mechanism 7, and a waste collection mechanism 8; wherein, the honeycomb worktable 2 is fixed to the top surface of the machine body 1 by bolts and is used to support the profile steel to be cut; the straightening mechanism 3 is fixed to the feed end of the machine body 1 by bolts and is used to perform online adaptive straightening of the incoming profile steel; the multi-degree-of-freedom linear drive mechanism 4 is fixed to the top surface of the machine body 1 by bolts and is used to drive the cutting execution mechanism 5 to achieve multi-degree-of-freedom linear cutting. The machine has multiple degrees of freedom of motion; the cutting actuator 5 is bolted to the moving end of the multi-degree-of-freedom linear drive mechanism 4 and is used to perform laser cutting operations; the CNC box 6 is bolted to the side of the machine body 1 and is electrically connected to the straightening mechanism 3, the multi-degree-of-freedom linear drive mechanism 4, the cutting actuator 5 and the adjustable support mechanism 7 respectively, and is used to realize the automated control of the whole machine; the adjustable support mechanism 7 is installed above the machine body 1 and corresponds to the position of the honeycomb worktable 2, and is used to provide auxiliary support for the steel profile during the cutting process; the waste collection mechanism 8 is set below the honeycomb worktable 2 and is used to collect the waste generated during cutting.

[0026] like Figure 2 As shown, the straightening mechanism 3 includes a set of adaptive straightening units 31. The adaptive straightening unit 31 includes a base 311, two side plates 312, a top plate 313, a vertical straightening unit 314, a horizontal straightening unit 315, a first adjustment mechanism 316, and a second adjustment mechanism 317. The base 311 is welded from Q235 steel plate with a nominal thickness of 25mm and is fixed to the feed end of the machine body 1 by bolts. The two side plates 312 are symmetrically welded to the top surface of the base 311. The side plates 312 are made of Q235 steel plate with a thickness of 20mm and have a first guide sliding hole 3121. The top plate 313 is welded from Q235 steel plate with a thickness of 25mm and is fixed to the top of the two side plates 312 by bolts.

[0027] like Figure 3As shown, the vertical straightening unit 314 includes a horizontal fixed straightening roller 3141, a first I-shaped slider 3142, a second I-shaped slider 3144, a horizontal moving straightening roller 3145, and a first pressure sensor 3146. The horizontal fixed straightening roller 3141 has a diameter of 100mm and a length of 200mm to ensure a sufficiently large contact area with the profile steel, avoiding localized stress concentration that could lead to indentations on the profile surface. It is rotatably connected between two side plates 312 via two deep groove ball bearings. The first I-shaped slider 3142 is made of 45# steel and is slidably embedded in the first guide hole 3121. The two are clearance-fitted with a tolerance of H7 / f6. The first I-shaped slider 314... 2 has a second guide sliding hole 3143; the second I-shaped slider 3144 is made of 45 steel and is slidably embedded in the second guide sliding hole 3143. The two are fitted with a clearance fit with a fit tolerance of H7 / f6; the first pressure sensor 3146 is an S-type tension and compression sensor of model JLBS-Ⅱ with a range of 0kN-50kN. It is fixed to the top of the second I-shaped slider 3144 by bolts, and its signal output terminal is electrically connected to the CNC box 6; the transverse moving straightening roller 3145 has the same dimensions, material, surface treatment and coaxiality tolerance as the transverse fixed straightening roller 3141. It is rotatably connected between the two second I-shaped sliders 3144 by two deep groove ball bearings.

[0028] Furthermore, the first adjustment mechanism 316 includes a connecting plate 3161, four support columns 3162, and a first cylinder 3163. The connecting plate 3161 is made of Q235 steel plate with a thickness of 20mm and is located directly above the top plate 313. The four support columns 3162 are made of No. 45 round steel with a diameter of 40mm. Their top ends are welded to the connecting plate 3161, and their bottom ends are welded to the first I-shaped slider 3142. The first cylinder 3163 is an SC series standard cylinder. Its cylinder body is fixed to the top of the top plate 313 by bolts, and the piston rod is rigidly connected to the connecting plate 3161 by a flange. The first cylinder 3163 drives the transverse moving straightening roller 3145 to move vertically along the first guide sliding hole 3121. In this embodiment, its upper limit position is a distance of 200mm between the lower surface of the transverse moving straightening roller 3145 and the upper surface of the transverse fixed straightening roller 3141, and its lower limit position is a distance of 0mm between the two.

[0029] like Figure 2 , Figure 4 and Figure 5As shown, the transverse straightening unit 315 includes two first C-shaped frames 3151, two lower mounting shafts 3152, two upper mounting shafts 3153, two first bearing seats 3154, two second C-shaped frames 3155, two longitudinal straightening rollers 3156, four threaded rods 3157, eight locking nuts 3158, and two second pressure sensors 3159; wherein, the first C-shaped frames 3151 are welded from Q235 steel plates with a thickness of 25mm; the lower mounting shafts 3152 are made of... The upper mounting shaft 3153 is made of 45# round steel with a diameter of 50mm. One end of the shaft is welded to the bottom end of the first C-shaped frame 3151, and the other end is rotatably connected to the base 311 through a deep groove ball bearing. The upper mounting shaft 3153 is made of 45# round steel with a nominal diameter of 50mm. One end of the shaft is welded to the top end of the first C-shaped frame 3151, and the other end is rotatably connected to the top plate 313 through the first bearing seat 3154. The first bearing seat 3154 is fixed to the end face of the top plate 313 by bolts. The second C-frame 3155 is welded from a 20mm thick Q235 steel plate; the second pressure sensor 3159 is a DYHW-116 miniature pressure sensor with a range of 0kN-30kN, and is bolted between the second C-frame 3155 and the first C-frame 3151, with its signal output terminal electrically connected to the CNC box 6; the longitudinal straightening roller 3156 has a diameter of 100mm and a length of 200mm to ensure a sufficiently large contact area with the profile steel, avoiding... To prevent localized stress concentration from causing indentations on the profile surface, it is rotatably mounted on the inner side of the second C-frame 3155 via two deep groove ball bearings; each second C-frame 3155 is uniformly welded with two threaded rods 3157, and the threaded rods 3157 pass through the corresponding through holes on the first C-frame 3151. Each threaded rod 3157 is screwed with a locking nut 3158 at one end extending out of the first C-frame 3151 to fix the relative position of the second C-frame 3155 and the first C-frame 3151.

[0030] like Figure 5As shown, the second pitch adjustment mechanism 317 includes a first synchronous pulley 3171, a second synchronous pulley 3172, a motor frame 3173, a first rotating shaft 3174, a servo motor 3175, a third synchronous pulley 3176, a first synchronous belt 3177, a second rotating shaft 3178, two second bearing seats 3179, a fourth synchronous pulley 3180, a first gear 3181, a second synchronous belt 3182, and a second gear 3183. The first synchronous pulley 3171 and the second synchronous pulley 3172 are coaxially fixed to the upper mounting shaft 3153 at the top of one of the first C-shaped frames 3151 via a flat key. The second gear 3183 is coaxially fixed to the upper mounting shaft 3153 at the top of the other first C-shaped frame 3151 via a flat key. The motor frame 3173 is welded from a 20mm thick Q235 steel plate and fixed to the top of the top plate 313 with bolts. The first rotating shaft 3174 has a diameter of 40mm. The servo motor 3175 is machined from No. 45 round steel, and its two ends are rotatably connected between the motor frame 3173 and the top plate 313 via deep groove ball bearings. The servo motor 3175 is fixed to the motor frame 3173 with bolts, and its output shaft is coaxially fixed to the first rotating shaft 3174 via a coupling. The third synchronous pulley 3176 is coaxially fixed to the first rotating shaft 3174 via a flat key. The first synchronous belt 3177 is a rubber synchronous belt, which is sleeved on the second synchronous pulley 3172 and the third synchronous pulley 3176 for transmitting power. The second rotating shaft 3178 is machined from No. 45 round steel with a diameter of 40mm, and is rotatably connected to one end of the top plate 313 via two second bearing seats 3179. Bolts are fixed to the top plate 313; the fourth synchronous pulley 3180 is coaxially fixed to the second rotating shaft 3178 via a flat key; the second synchronous belt 3182 is a rubber synchronous belt, sleeved on the first synchronous pulley 3171 and the fourth synchronous pulley 3180, for transmitting power; the first gear 3181 is coaxially fixed to the second rotating shaft 3178 via a flat key, and meshes with the second gear 3183; the servo motor 3175 drives the two first C-shaped frames 3151 to rotate synchronously in opposite directions through synchronous belt drive and gear drive, thereby driving the two longitudinal straightening rollers 3156 to open and close synchronously, with an opening and closing angle range of 0°-30°, and the extreme position is the inner distance between the two longitudinal straightening rollers 3156 of 50mm-300mm.

[0031] like Figure 1 and Figure 6As shown, the multi-degree-of-freedom linear drive mechanism 4 includes two sets of X-axis linear modules 41, one set of Y-axis linear modules 42, and one set of Z-axis linear modules 43. The two sets of X-axis linear modules 41 are symmetrically fixed to the top of the body 1 by bolts, and the stroke of the X-axis linear modules 41 is 2000mm-6000mm. The Y-axis linear modules 42 are fixed to the moving ends of the two sets of X-axis linear modules 41 by bolts, and the stroke of the Y-axis linear modules 42 is 1000mm-2000mm. The Z-axis linear modules 43 are fixed to the moving ends of the Y-axis linear modules 42 by bolts, and the stroke of the Z-axis linear modules 43 is 100mm-300mm.

[0032] The cutting actuator 5 includes a fixed base 51, a laser head 52, a vision camera 53, a ring light source 54, and a negative pressure suction pipe 55. The laser head 52 is made of 20mm thick Q235 steel plate and is bolted to the moving end of the Z-axis linear module 43. The laser head 52 is a fiber laser cutting head, bolted to the fixed base 51, used to emit laser light for cutting. The vision camera 53 is an industrial area array camera, bolted to the fixed base 51 and located to one side of the laser head 52, used to collect the position information of the steel profile and transmit it to the CNC box 6. The ring light source 54 is a white LED light source, bolted to the fixed base 51 and located directly below the vision camera 53, used to provide uniform illumination for the vision camera 53. The negative pressure suction pipe 55 is a stainless steel pipe with a diameter of 75mm, bolted to the fixed base 51, with its suction port facing the cutting end of the laser head 52, used to suck up the smoke and fine waste generated during cutting.

[0033] like Figure 7 and Figure 8As shown, the adjustable support mechanism 7 includes multiple support rollers 71 and two sets of height adjustment mechanisms 72; the height adjustment mechanism 72 includes a mounting frame 721, two mounting rods 722, multiple first connecting arms 723, multiple cross shafts 724, two second connecting arms 725, and two second cylinders 726; wherein, the mounting frame 721 is welded from Q235 steel plate with a thickness of 20mm and fixed to the machine body 1 by bolts; the two mounting rods 722 are symmetrically distributed, made of 45# round steel with a diameter of 60mm, and rotatably mounted on the mounting frame 721 by deep groove ball bearings; multiple first connecting arms 723 are welded to the mounting rods 722 at equal intervals, and the first connecting arms 723 are made of Q235 steel plate with a thickness of 20mm; The support roller 71 has a diameter of 80mm and a length of 150mm. It is rotatably mounted between the top ends of two opposing first connecting arms 723 via a cross shaft 724. The two second connecting arms 725 are respectively welded to one end of two mounting rods 722. The second cylinder 726 adopts a standard SC series cylinder with a cylinder diameter of 80mm and a stroke of 150mm. Its cylinder body is hinged to the inner wall of the machine body 1, and the piston rod is hinged to the top end of the second connecting arm 725. The second cylinder 726 drives the mounting rod 722 to rotate, thereby driving the support roller 71 to make an arc motion around the axis of the mounting rod 722. Its upper limit position is when the upper surface of the support roller 71 is 50mm higher than the top surface of the honeycomb worktable 2, and its lower limit position is 10mm lower than the top surface of the honeycomb worktable 2.

[0034] like Figure 9 As shown, the collection mechanism 8 includes two guide plates 81 and a collection drawer 82; the two guide plates 81 are made of 304 stainless steel plate with a thickness of 3mm, and are symmetrically and inclinedly welded to the bottom of the honeycomb workbench 2 at an inclination angle of 45°; the collection drawer 82 is made of 304 stainless steel plate with a thickness of 2mm, and is slidably embedded in the body 1 and located below the two guide plates 81; a handle 83 is fixed to the outer end of the collection drawer 82 by bolts, which facilitates the pulling out of the collection drawer 82.

[0035] The working process of this embodiment is as follows: First, the upstream conveying equipment transports the steel profile to be cut to the feed inlet of the straightening mechanism 3. The CNC box 6 controls the first cylinder 3163 to move according to the preset steel profile specifications, driving the transverse moving straightening roller 3145 to move to the preset height. At the same time, it controls the servo motor 3175 to move, driving the two longitudinal straightening rollers 3156 to open and close to the preset spacing.

[0036] The steel profile passes sequentially through a vertical straightening unit 314 and a horizontal straightening unit 315. A first pressure sensor 3146 detects the vertical straightening pressure in real time, and a second pressure sensor 3159 detects the horizontal straightening pressure in real time. The pressure signals are transmitted to the CNC box 6. The CNC box 6 compares the real-time detected pressure value with a preset standard pressure value. When the actual pressure value is greater than the standard pressure value, the first cylinder 3163 is controlled to appropriately reduce the output pressure. When the actual pressure value is less than the standard pressure value, the first cylinder 3163 is controlled to appropriately increase the output pressure. At the same time, the rotation angle of the servo motor 3175 is adjusted according to the horizontal pressure signal, thereby achieving adaptive straightening and eliminating longitudinal bending and lateral bending defects of the steel profile.

[0037] The straightened steel section is conveyed to the top of the honeycomb worktable 2. The CNC box 6 controls the second cylinder 726 to move, driving the support roller 71 to rise to the preset height to provide auxiliary support for the steel section and prevent it from shaking during the cutting process.

[0038] Subsequently, the vision camera 53, under the illumination of the ring light source 54, collects the actual position information of the steel profile and transmits it to the CNC box 6. Based on the visual positioning result, the CNC box 6 controls the multi-degree-of-freedom linear drive mechanism 4 to move the cutting execution mechanism 5 to the cutting start position. The laser head 52 emits a laser and performs cutting operations according to the preset cutting trajectory under the drive of the multi-degree-of-freedom linear drive mechanism 4. During the cutting process, the negative pressure dust suction pipe 55 continuously sucks up the smoke and dust and fine waste generated during cutting. Large pieces of waste generated during cutting fall onto the guide plate 81 through the hollow structure of the honeycomb worktable 2 and slide down along the guide plate 81 into the collection drawer 82 for collection.

[0039] After cutting is completed, the CNC box 6 controls the support roller 71 to descend, and the downstream conveying equipment transports the cut steel to the next process. Example 2

[0040] This embodiment is an enhanced straightening machine with multiple sets of adaptive straightening units 31 connected in series, which is suitable for production scenarios where the incoming material has large deformation or high requirements for straightening accuracy.

[0041] like Figure 2 As shown, the bases 311 of the two sets of adaptive straightening units 31 are fixed to the feed end of the machine body 1 by bolts in sequence, and the distance between the two adjacent sets of adaptive straightening units 31 is 800mm; the structure of the two sets of adaptive straightening units 31 is exactly the same as the structure of the adaptive straightening unit 31 described in Embodiment 1. The first pressure sensor 3146 is a JLBS-Ⅱ type S-type tension and compression sensor, the second pressure sensor 3159 is a DYHW-116 type miniature pressure sensor, and the first cylinder 3163 is an SC series standard cylinder, which will not be described in detail here.

[0042] The working process of this embodiment is basically the same as that of embodiment 1. The difference is that the steel section to be cut is straightened twice by two sets of adaptive straightening units 31 in sequence: the first set of adaptive straightening units 31 is used to eliminate the large-size macroscopic deformation of the steel section, and the second set of adaptive straightening units 31 is used to eliminate the residual micro-deformation of the steel section, thereby obtaining higher straightening accuracy.

[0043] By arranging two sets of adaptive straightening units 31 in series at the feeding end, the steel with large deformation can be fully straightened, which further improves the straightening effect and cutting accuracy, and effectively reduces the product defect rate caused by residual deformation of the steel. It is particularly suitable for high-end steel structure production scenarios with high product quality requirements. Example 3

[0044] This embodiment has a structure that is basically the same as that of embodiment 1. The difference is that the negative pressure suction pipe 55 adopts an adjustable angle structure, which can flexibly adjust the suction position according to different cutting processes and cutting angles to improve the dust extraction effect.

[0045] like Figure 6 As shown, the negative pressure suction pipe 55 includes a metal shaping tube and a suction nozzle; wherein, the metal shaping tube is a flexible stainless steel metal hose that can be bent and shaped at will; the suction nozzle is a trumpet-shaped suction nozzle, which is stamped from 304 stainless steel plate.

[0046] By adopting a negative pressure suction tube 55 structure with adjustable angle and position, the suction position can be flexibly adjusted according to different cutting processes and cutting angles, so that the suction nozzle is always aligned with the cutting point, which greatly improves the dust extraction effect and effectively improves the workshop working environment; at the same time, the metal shaping tube can be bent and shaped at will, which is simple and convenient to operate and can quickly adapt to the cutting needs of steel of different specifications.

[0047] It should be noted that the above electrical components are all commercially available conventional equipment with built-in power switches. Those skilled in the art can make conventional selections according to their needs. Their working principles are common knowledge known to those skilled in the art and have been fully disclosed in the prior art, so they will not be elaborated on further in this article.

[0048] The circuit connection involved in this invention is a conventional method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0049] Components not described in detail in this article are existing technologies.

[0050] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser cutting machine for use in a smart production line for profile steel, comprising a machine body (1) and a honeycomb worktable (2) fixed to the top surface of the machine body (1), characterized in that: The feed end of the machine body (1) is fixedly installed with a straightening mechanism (3) for online adaptive straightening of incoming steel profiles. The straightening mechanism (3) includes at least one set of adaptive straightening units (31), and the adaptive straightening unit (31) includes a vertical straightening unit (314) and a horizontal straightening unit (315). Both the vertical straightening unit (314) and the horizontal straightening unit (315) are equipped with pressure detection components; The top surface of the body (1) is also fixedly installed with a multi-degree-of-freedom linear drive mechanism (4), and the moving end of the multi-degree-of-freedom linear drive mechanism (4) is fixed with a cutting execution mechanism (5). The machine body (1) has a CNC box (6) fixed on its side. The CNC box (6) is electrically connected to the straightening mechanism (3), the multi-degree-of-freedom linear drive mechanism (4), and the cutting execution mechanism (5). The CNC box (6) is configured to automatically adjust the straightening force of the vertical straightening unit (314) and the horizontal straightening unit (315) according to the real-time pressure signal of the pressure detection component.

2. The laser cutting machine for a smart steel production line according to claim 1, characterized in that: The adaptive straightening unit (31) also includes a base (311), two side plates (312) symmetrically fixed to the top surface of the base (311), and a top plate (313) fixed to the top of the two side plates (312). The side plates (312) are provided with a first guide sliding hole (3121).

3. The laser cutting machine for a steel profile intelligent production line according to claim 2, characterized in that: The vertical straightening unit (314) includes a horizontal fixed straightening roller (3141), a first I-shaped slider (3142), a second I-shaped slider (3144), and a horizontal moving straightening roller (3145). The transverse straightening roller (3141) is rotatably connected between two side upright plates (312), and the first I-shaped slider (3142) is slidably embedded in the first guide sliding hole (3121); The first I-shaped slider (3142) is provided with a second guide slide hole (3143), and the second I-shaped slider (3144) is slidably embedded in the second guide slide hole (3143). The pressure detection component includes a first pressure sensor (3146) fixed to the top of the second I-shaped slider (3144), and the first pressure sensor (3146) is electrically connected to the CNC box (6). The transverse moving straightening roller (3145) is rotatably connected between two second I-shaped sliders (3144).

4. A laser cutting machine for a steel profile intelligent production line according to claim 3, characterized in that: A first adjusting mechanism (316) is fixed on the top plate (313). The first adjusting mechanism (316) includes a connecting plate (3161), a support column (3162), and a first cylinder (3163). The connecting plate (3161) is located directly above the top plate (313), and the top end of the support column (3162) is rigidly fixed to the connecting plate (3161), and the bottom end is rigidly fixed to the first I-shaped slider (3142); The cylinder body of the first cylinder (3163) is fixed to the top of the top plate (313), and the piston rod of the first cylinder (3163) is rigidly fixed to the connecting plate (3161).

5. A laser cutting machine for a steel profile intelligent production line according to claim 2, characterized in that: The transverse straightening unit (315) includes two first C-shaped frames (3151), two lower mounting shafts (3152), two upper mounting shafts (3153), two second C-shaped frames (3155), and two longitudinal straightening rollers (3156). The bottom end of the first C-shaped frame (3151) is rotatably connected to the base (311) via the lower mounting shaft (3152), and the top end is fixed with an upper mounting shaft (3153). The upper mounting shaft (3153) is rotatably connected to the top plate (313) via the first bearing seat (3154). The second C-frame (3155) is fixed on the first C-frame (3151), and the pressure detection assembly includes a second pressure sensor (3159) fixed between the second C-frame (3155) and the first C-frame (3151), and the second pressure sensor (3159) is electrically connected to the CNC box (6); The longitudinal straightening roller (3156) is rotatably mounted inside the second C-frame (3155).

6. A laser cutting machine for a smart steel production line according to claim 5, characterized in that: The adaptive straightening unit (31) further includes a second pitch adjustment mechanism (317), which includes a first synchronous pulley (3171), a second synchronous pulley (3172), a motor frame (3173), a first rotating shaft (3174), a servo motor (3175), a third synchronous pulley (3176), a first synchronous belt (3177), a second rotating shaft (3178), a second bearing seat (3179), a fourth synchronous pulley (3180), a first gear (3181), a second synchronous belt (3182), and a second gear (3183). The first synchronous pulley (3171) and the second synchronous pulley (3172) are coaxially fixed on the upper mounting shaft (3153) at the top of one of the first C-shaped frames (3151), and the second gear (3183) is coaxially fixed on the upper mounting shaft (3153) at the top of the other first C-shaped frame (3151). The motor frame (3173) is fixed to the top of the top plate (313), and the first rotating shaft (3174) is rotatably connected between the motor frame (3173) and the top plate (313); The servo motor (3175) is fixed on the motor frame (3173), and its output shaft is coaxially and fixedly connected to the first rotating shaft (3174). The third synchronous pulley (3176) is coaxially fixed on the first rotating shaft (3174), and the first synchronous belt (3177) is sleeved on the second synchronous pulley (3172) and the third synchronous pulley (3176); The second rotating shaft (3178) is rotatably connected to the top plate (313) through the second bearing seat (3179), and the fourth synchronous pulley (3180) is coaxially fixed on the second rotating shaft (3178); The second synchronous belt (3182) is fitted onto the first synchronous pulley (3171) and the fourth synchronous pulley (3180); The first gear (3181) is coaxially fixed on the second rotating shaft (3178) and meshes with the second gear (3183).

7. A laser cutting machine for a smart steel production line according to claim 5, characterized in that: The lateral straightening unit (315) also includes a threaded rod (3157) and a locking nut (3158). At least two of the threaded rods (3157) are evenly fixed on the second C-frame (3155) and pass through the first C-frame (3151), and the locking nut (3158) is screwed onto the end of the threaded rod (3157) that extends out of the first C-frame (3151).

8. A laser cutting machine for a smart steel production line according to claim 1, characterized in that: The multi-degree-of-freedom linear drive mechanism (4) includes an X-axis linear module (41), a Y-axis linear module (42), and a Z-axis linear module (43); the cutting execution mechanism (5) includes a fixed base (51), a laser head (52), a vision camera (53), a ring light source (54), and a negative pressure suction pipe (55); The two sets of X-axis linear modules (41) are symmetrically fixed on the top of the body (1), the Y-axis linear module (42) is fixed to the moving end of the X-axis linear module (41), and the Z-axis linear module (43) is fixed to the moving end of the Y-axis linear module (42). The fixed base (51) is fixed to the moving end of the Z-axis linear module (43), and the laser head (52) is fixed on the fixed base (51); The visual camera (53) and the ring light source (54) are both fixed on the mounting base (51) and located on one side of the laser head (52). The ring light source (54) is located directly below the visual camera (53). The negative pressure suction pipe (55) is fixed on the mounting base (51) and its suction port faces the cutting end of the laser head (52).

9. A laser cutting machine for a steel profile intelligent production line according to claim 1, characterized in that: An adjustable support mechanism (7) for supporting the steel profile is fixed above the body (1) at the position corresponding to the honeycomb workbench (2). The adjustable support mechanism (7) includes a support roller (71) and a height adjustment mechanism (72). The height adjustment mechanism (72) includes a mounting frame (721), a mounting rod (722), a first connecting arm (723), a cross shaft (724), a second connecting arm (725), and a second cylinder (726). The two mounting rods (722) are symmetrically distributed and are rotatably mounted inside the body (1) via mounting brackets (721); Multiple first connecting arms (723) are evenly distributed, and their bottom ends are fixed on the mounting rod (722). The support roller (71) is rotatably mounted between the top ends of two first connecting arms (723) via a cross shaft (724). The bottom end of the second connecting arm (725) is fixed to the mounting rod (722); The cylinder body of the second cylinder (726) is hinged to the machine body (1), and its piston rod is hinged to the top of the second connecting arm (725).

10. A laser cutting machine for a steel profile intelligent production line according to claim 1, characterized in that: Below the cellular workbench (2) is a collection mechanism (8), which includes a guide plate (81) and a collection drawer (82). The two guide plates (81) are symmetrically distributed and tilted and fixed below the honeycomb workbench (2), and the collection drawer (82) is slidably embedded in the body (1) and located below the two guide plates (81); The outer end of the collection drawer (82) is fixed with a handle (83).

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