Automatic laser cutting mechanism for batch stainless steel pipes and processing method of automatic laser cutting mechanism

Abstract

The invention belongs to the technical field of stainless steel pipe cutting, and particularly relates to an automatic laser cutting mechanism for batch stainless steel pipes and a processing method thereof.The automatic laser cutting mechanism comprises a rack, a mounting back plate is fixedly mounted on the upper surface of the rack, a conveying plate is arranged on the upper surface of the mounting back plate, and a grating is arranged on the upper surface of the conveying plate; through cooperation of the driving gear, the ratchet wheel and the pawl, accurate control over the cutting angle is achieved, cutting consistency of special angles such as a diagonal plane groove is guaranteed, angle deviation of a pipe fitting due to vibration or cutting force reaction in the laser cutting process is prevented, and the situation that high-energy light beams generate instantaneous impact force on the pipe fitting during laser cutting is avoided; the impact force can be counteracted through tight meshing of the pawl and the ratchets, it is ensured that the angle of the pipe fitting is stabilized at a target value, stepped accurate control over the angle is achieved, the ratchet distance of the ratchet wheel is controlled in the mode that each tooth corresponds to one angle increment, and pulse control of the servo motor is matched, so that the angle adjusting precision can be improved, and the requirement for high-precision diagonal plane cutting is met.

Description

Technical Field

[0001] The invention belongs to the technical field of stainless steel pipe cutting, in particular to an automatic laser cutting mechanism for batch stainless steel pipes and a processing method thereof. Background Art

[0002] With the development of society, stainless steel pipes are widely used in many fields such as stair railings, security doors, water pipes, and flues due to their excellent corrosion resistance and waterproof properties. Stainless steel pipes are mostly standard specifications when they come out of the factory, and in actual applications they usually need to be cut and processed to meet the needs of different scenarios.

[0003] A Chinese invention patent publication numbered CN116352168A discloses an automatic cutting mechanism for steel pipes of different lengths, comprising a base, a slide electric cylinder, a guide rail, a feeding mechanism, a stabilizing mechanism, a cutting mechanism, and a receiving mechanism. The feeding mechanism and the receiving mechanism are respectively arranged on either side of the cutting mechanism. The feeding mechanism is used to convey the steel pipe along the guide rail to the cutting mechanism and control the cutting length. The receiving mechanism is used to clamp the cut end of the steel pipe; the cutting mechanism is used to cut the steel pipe into a specified length; the stabilizing mechanism is arranged between the feeding mechanism and the cutting mechanism, and cooperates with the feeding mechanism to ensure the stability of the steel pipe conveyance. The present invention can realize automated steel pipe cutting, using a slide electric cylinder to control the length of the steel pipe to complete the steel pipe cutting, with a cutting length accuracy of up to 0.1mm. In addition, it can also meet the needs of one-time feeding of long pipes, and can automatically cut steel pipes of various lengths, significantly improving cutting efficiency while ensuring length accuracy.

[0004] However, the above technology often has the following defects: although the mechanism can realize the automatic cutting of a single steel pipe, its loading, conveying and cutting processes are all designed around a single pipe fitting, and it is impossible to simultaneously process multiple stainless steel pipes, and there are large differences in their pipe diameters and wall thickness parameters. The structural design of the material stabilizing mechanism and the material receiving mechanism components in the above technology is relatively fixed, and it is difficult to flexibly adjust to adapt to pipe fittings of different specifications. When it is necessary to cut stainless steel pipes of different diameters, it is often necessary to perform complex debugging or replacement of components on the mechanism, which not only increases the difficulty and time cost of operation, but may also affect the cutting accuracy due to improper adjustment, reducing the versatility and practicality of the equipment.

[0005] To this end, the present invention provides a batch stainless steel pipe automatic laser cutting mechanism and a processing method thereof. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides an automatic laser cutting mechanism for batch stainless steel pipes and a processing method thereof, comprising a frame, an upper surface of the frame is fixedly mounted with a mounting back plate, an upper surface of the mounting back plate is provided with a conveying plate, an upper surface of the conveying plate is provided with a grid, a longitudinal rail plate is fixedly mounted at one edge of the upper surface of the frame, a pneumatic push rod is provided at one edge of the surface of the longitudinal rail plate, a conveying wheel is fixedly mounted at the middle part of the lower surface of the pneumatic push rod, the conveying wheel and the conveying plate on one side are in the same plane, a notch is provided on a side of the frame close to the conveying plate, a bed base is fixedly mounted on one surface of the frame, a cross plate is fixedly mounted at one edge of the upper surface of the bed base, and the cross plate on the bed base is connected with a changing mechanism; The changing mechanism includes a fixing seat connected to an end face of one side of the horizontal plate, an annular groove is opened in the middle of the upper surface of the fixing seat, a positioning angle groove is provided on the side of the fixing seat close to the annular groove, and a peripheral groove is provided on the side of the fixing seat close to the annular groove, the inner bottom wall of the annular groove is movably connected to a ratchet through a rotating shaft, a pawl is movably engaged with the ratchet teeth on the outer arc surface of the ratchet, one side of the lower surface of the pawl is movably connected to the peripheral groove through a rotating shaft, one side of the upper surface of the pawl is connected to a reset spring, the inner bottom wall of the positioning angle groove is movably connected to a driving gear through a rotating shaft, and a V-shaped plate is fixedly installed on the upper surface of the driving gear.

[0008] Both sides of the upper surface of the V-shaped plate are provided with warped edges, and a pipe clamping mechanism is fixedly installed on the upper surface of the warped edge by bolts. The pipe clamping mechanism includes an annular base plate fixedly installed on the warped edge surface, and a beveled boss is provided on the top of the back side of the annular base plate.

[0009] The inner side wall of the beveled boss is movably connected to an abutment wheel via a rotating shaft. A threaded hole is provided on the front of the annular base plate. An annular reinforcement rib is fixedly installed on the annular base plate through the threaded hole on one side. The annular reinforcement rib is an elastic structure. A through hole is provided in the middle of one side surface of the annular reinforcement rib. An expansion ring is sleeved on the inner arc surface of the through hole of the annular reinforcement rib.

[0010] A hinge portion is provided on the back of one side surface of the expansion ring, and the expansion ring is fixedly connected to the annular reinforcement rib through the hinge portion. A deformation cavity is provided on the outer arc surface of the expansion ring away from the hinge portion, and a circular support ring is fixedly installed on the side of the annular reinforcement rib away from the hinge portion.

[0011] The outer arc surface of the circular support ring is connected to a connecting locking rod, one side of the inner arc surface of the connecting locking rod is sleeved with a half-edge clamping arm A, and the other side of the inner arc surface of the connecting locking rod is sleeved with a half-edge clamping arm B. Both the half-edge clamping arm A and the half-edge clamping arm B are provided with an arc surface on one side.

[0012] The arc surface and the through hole on one side of the annular reinforcement rib are in the same plane, and the top and bottom of one side surface of the half-edge clamp arm B and the half-edge clamp arm A are both provided with connecting holes.

[0013] The inner arc surface of the connecting hole is connected with a clamping tension spring. There are two clamping tension springs, which are placed at the top and bottom of the arc surface. The outer arc surfaces of the half-edge clamp arm B and the half-edge clamp arm A are both provided with semicircular parts, and the outer arc surfaces of the semicircular parts are in contact with the bottom surface of the connecting locking rod.

[0014] Sliding guide rails are provided on both side end surfaces of the bed base, and the inner side walls of the sliding guide rails are slidably connected with driving side plates. A horizontal driving source is fixedly installed in the middle of one side surface of the two driving side plates, and the upper surface of the horizontal driving source is connected to the longitudinal driving source.

[0015] A cantilever beam is fixedly mounted on the end face of the longitudinal driving source, a laser cutting head is fixedly mounted on one side of the cantilever beam, a sensor is provided on the top of the laser cutting head, and the laser cutting head and the pipe clamping mechanism are in the same plane.

[0016] A batch stainless steel pipe automatic laser cutting mechanism and a processing method thereof, the method adopts the above-mentioned batch stainless steel pipe automatic laser cutting mechanism, and includes the following steps: S1. Loading preparation: Place the stainless steel pipe to be cut neatly on the conveyor plate. According to the length and diameter of the pipe, adjust the deformation degree of the expansion ring and the pre-tightening force of the clamping spring to make the pipe clamping mechanism adapt to the pipe specifications; S2. Automatic conveying: Start the pneumatic push rod, and the conveying wheel pushes the pipe along the conveying plate to the notch. The pipe enters the clamping range of the pipe clamping mechanism through the notch, and the abutment wheel positions the end of the pipe. S3. Clamping and fixing: After the pipe fitting enters the clamping area, the half-edge clamping arm A and the half-edge clamping arm B automatically clamp the pipe fitting under the action of the clamping tension spring to complete the synchronous fixation of multiple pipe fittings.

[0017] S4. Parameter setting and adjustment: The cutting length and laser power parameters are set through the control system. The driving gear drives the V-shaped plate to adjust the angle of the pipe, and the ratchet and pawl lock the angle position.

[0018] S5. Laser cutting: The horizontal drive source and the longitudinal drive source drive the laser cutting head to the cutting starting position. After the sensor calibrates the position of the pipe, the laser cutting head starts and cuts multiple pipes simultaneously along the preset path.

[0019] S6, Unloading and Circulation: After cutting is completed, the tube clamping mechanism is released, and the cut tubes fall to the collection area. At the same time, the conveyor wheel continues to transport the next batch of tubes, repeating the above steps to achieve continuous batch processing.

[0020] The beneficial effects of the present invention are as follows: 1. Through the cooperation of the driving gear, ratchet and pawl, precise control of the cutting angle is achieved, ensuring the consistency of cutting at special angles such as bevels and grooves. It not only prevents the angle of the pipe from shifting due to vibration or cutting force reaction during the laser cutting process, but also prevents the high-energy beam from generating instantaneous impact force on the pipe during laser cutting. The tight engagement of the pawl and ratchet teeth can offset this impact force, ensuring that the pipe angle is stable at the target value. It also achieves stepped precise control of the angle. The ratchet tooth spacing of the ratchet is controlled so that each tooth corresponds to one angle increment. Combined with the pulse control of the servo motor, the angle adjustment accuracy can be improved to meet the needs of high-precision bevel cutting.

[0021] 2. The tube clamping mechanism is designed with elastic adaptation and mechanical clamping to firmly clamp multiple stainless steel tubes of different diameters at the same time. The elastic deformation of the annular reinforcement rib and the deformation of the cavity of the expansion ring can adapt to the difference in the outer diameter of the tube fittings, ensuring that tube fittings of different specifications can fit tightly with the clamping components. The half-edge clamping arm A and the half-edge clamping arm B form an embracing clamp under the action of the clamping tension spring. Combined with the support structure of the semicircular part and the connecting lock rod, it can provide uniform and sufficient clamping force for the tube fittings. Even under the high-frequency vibration of laser cutting, it can prevent the tube fittings from displacement or shaking, ensuring the stability of the synchronous processing of multiple tube fittings.

[0022] 3. The simultaneous clamping and cutting design of multiple pipes breaks through the limitations of traditional single-pipe processing. The pipe clamping mechanism can simultaneously and firmly clamp multiple stainless steel pipes of different specifications. Under the coordinated action of the transverse drive source and the longitudinal drive source, the laser cutting head can synchronously cut all clamped pipes. The processing volume per unit time is significantly improved compared with the single-pipe cutting mode. At the same time, the automated conveying and unloading process reduces manual intervention, greatly shortening the single processing cycle time compared with traditional equipment, which can meet the high-efficiency needs of large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is an overall stereogram of the automatic laser cutting of stainless steel pipes of the present invention; Figure 2 This is a front view of the connection between the changing mechanism and the tube clamping mechanism of the present invention; Figure 3 It is an overall front view of the present invention; Figure 4 1 is a schematic diagram of the top view of the changing mechanism of the present invention; Figure 5 1 is a bottom view of the structure of the pipe clamping mechanism of the present invention; Figure 6This is a schematic diagram of the disassembled structure of the pipe clamping mechanism of the present invention; Figure 7 It is a schematic structural diagram of the expansion ring in the present invention; Figure 8 It is a structural schematic diagram of the circular support ring in the present invention; Figure 9 It is a structural schematic diagram of the half-edge clamping arm B and the half-edge clamping arm A in the present invention.

[0025] In the figure: 1, frame; 101, conveyor plate; 102, grille; 103, notch; 2. Longitudinal rail; 3. Pneumatic push rod; 4. Transmission wheel; 5. Bed base; 6. Changing mechanism; 61. Fixed seat; 611. Annular groove; 612. Positioning angle groove; 62. Ratchet; 63. Pawl; 64. Reset spring; 65. Driving gear; 7. V-shaped plate; 701. Warping edge; 8. Tube clamping mechanism; 81. Annular base plate; 811. Beveled boss; 82. Abutment wheel; 83. Annular reinforcement rib; 84. Expansion ring; 841. Hinge; 85. Circular support ring; 851. Connecting lock rod; 86. Half-edge clamp arm A; 87. Half-edge clamp arm B; 88. Arc-shaped surface; 89. Connecting hole; 810. Clamping spring; 812. Semicircular portion; 9. Sliding guide rail; 10. Driving side plate; 11. Horizontal driving source; 12. Longitudinal driving source; 13. Cantilever beam; 14. Laser cutting head. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1 and Figure 3 As shown, the embodiment of the present invention includes a frame 1, a mounting backplate is fixedly installed on the upper surface of the frame 1, a conveying plate 101 is provided on the upper surface of the mounting backplate, a grid 102 is provided on the upper surface of the conveying plate 101, a longitudinal rail plate 2 is fixedly installed at one edge of the upper surface of the frame 1, a pneumatic push rod 3 is provided at one edge of the surface of the longitudinal rail plate 2, a conveying wheel 4 is fixedly installed in the middle of the lower surface of the pneumatic push rod 3, the conveying wheel 4 and the conveying plate 101 on one side are in the same plane, a notch 103 is provided on the side of the frame 1 close to the conveying plate 101, a bed base 5 is fixedly installed on one surface of the frame 1, a horizontal plate is fixedly installed at one edge of the upper surface of the bed base 5, and the horizontal plate on the bed base 5 is connected with a changing mechanism 6.

[0028] A mounting back plate is fixedly installed on the upper surface of the frame 1. The conveying plate 101 on the upper surface of the back plate is used to carry stainless steel pipes. The grille 102 on the surface of the conveying plate 101 can reduce the contact area between the pipe and the plate surface and reduce friction resistance. A pneumatic push rod 3 is installed on the longitudinal rail plate 2 on the edge of one side of the frame 1. The conveying wheel 4 on the lower surface of the push rod is in the same plane as the conveying plate 101. The conveying wheel 4 is driven to rotate by the extension and contraction of the pneumatic push rod 3 to realize the conveying of the pipe to the cutting area. A notch 103 is provided on the side of the frame 1 close to the conveying plate 101 to guide the pipe to the subsequent cutting station. The bed base 5 on the side surface of the frame 1 provides support for the cutting core components, and the changing mechanism 6 connected to the top horizontal plate is used to realize the synchronous adjustment of multiple pipe fittings. In the changing mechanism 6, the fixed seat 61 is fixed on the bed base 5 through the horizontal plate, and the ratchet 62 is movably connected to the annular groove 611 on its surface through a rotating shaft. The ratchet teeth on the outer arc surface of the ratchet 62 are movably engaged with the pawl 63. The bottom of the pawl 63 is connected to the outer groove of the fixed seat 61 through a rotating shaft, and the reset spring 64 on the upper surface ensures that the pawl 63 is always engaged with the ratchet 62 to realize the unidirectional rotation limit of the ratchet 62. The driving gear 65 is installed in the positioning angle groove 612 of the fixed seat 61 through the rotating shaft, and the V-shaped plate 7 fixed on the upper surface of the gear can adjust the angle as the gear rotates.

[0029] The operator places the stainless steel pipe to be processed steadily on the conveying plate 101. The strip-shaped hollow structure of the grid 102 can effectively reduce the contact area between the pipe and the plate surface, thereby greatly reducing the friction force on the pipe during the conveying process. At this time, the pneumatic push rod 3 on the longitudinal rail plate 2 receives the start signal, and the push rod piston rod extends downward, driving the conveying wheel 4 to contact the surface of the stainless steel pipe. Subsequently, the conveying wheel 4 starts to rotate under the drive of the drive motor, and its rotation direction is consistent with the conveying direction of the pipe. With the help of the friction between the wheel surface and the pipe, the pipe is pushed steadily along the extension direction of the grid 102. When the pipe is pushed to the notch 103 of the frame 1, the guide plates on both sides of the notch 103 will accurately correct the direction of travel of the pipe to ensure that the pipe can accurately enter the clamping area of ​​the pipe clamping mechanism 8. In the process of the end of the pipe gradually approaching the pipe clamping mechanism 8, the abutment wheel 82 on the inner side of the beveled boss 811 on the back side of the annular base plate 81 will first contact the end of the pipe. The abutment wheel 82 rotates flexibly through the rotating shaft and generates rolling friction when contacting the pipe, which not only avoids damage to the end of the pipe, but also uses the blocking effect of the wheel body to preliminarily limit the axial displacement of the pipe, preparing for subsequent clamping and fixation.

[0030] like Figure 2 and Figure 4As shown, the changing mechanism 6 includes a fixed seat 61 connected to the end face of one side of the horizontal plate, an annular groove 611 is provided in the middle of the upper surface of the fixed seat 61, a positioning angle groove 612 is provided on the side of the fixed seat 61 close to the annular groove 611, and a peripheral groove is provided on the side of the fixed seat 61 close to the annular groove 611. The inner bottom wall of the annular groove 611 is movably connected to the ratchet 62 through a rotating shaft, and a pawl 63 is movably engaged with the ratchet teeth on the outer arc surface of the ratchet 62. One side of the lower surface of the pawl 63 is movably connected to the peripheral groove through a rotating shaft, and one side of the upper surface of the pawl 63 is connected to a reset spring 64. The inner bottom wall of the positioning angle groove 612 is movably connected to the driving gear 65 through a rotating shaft, and the upper surface of the driving gear 65 is fixedly installed with a V-shaped plate 7.

[0031] When it is necessary to cut the oblique cross-section of the pipeline (such as a bevel, an inclined surface with a non-right-angle section), the drive system of the change mechanism 6, the drive gear 65 generates rotational power under the drive of the servo motor. Since the drive gear 65 is rigidly connected to the V-shaped plate 7 by bolts, the rotation of the gear is directly converted into the rotational motion of the V-shaped plate 7. The V-shaped plate 7 rotates with the rotating shaft in the positioning angle groove 612 as the center of the circle, and the pipe clamping mechanism 8 with the warped edges 701 on both sides thereof fixed thereon rotates together, thereby driving the clamped stainless steel pipe to change its angle synchronously. At this time, the axis of the pipe and the cutting plane of the laser cutting head 14 form a preset angle, laying the foundation for cutting cross-sections at different angles. During the angle adjustment process, the cooperation between the fixed seat 61, the ratchet 62 and the pawl 63 realizes the dynamic limitation and precise locking of the angle. The ratchet 62 is linked with the driving gear 65 through the rotating shaft, and rotates synchronously with the rotation of the V-shaped plate 7. The ratchet teeth on its outer arc surface and the pawl 63 always remain in a meshing state. When the driving gear 65 drives the pipe to rotate to the target angle, the ratchet teeth of the ratchet 62 will lift the pawl 63, causing the pawl 63 to swing upward around the rotating shaft in the outer groove, and at the same time stretch the reset spring 64 to store elastic potential energy. When the pipe angle reaches the preset value to cut the cross section, the driving gear 65 drives the pipe to rotate, the driving motor stops running, the reset spring 64 releases the elastic potential energy, pulls the pawl 63 back quickly, and re-engages it in the ratchet gap of the ratchet 62, forming a rigid lock. This one-way locking structure of the ratchet 62 and the pawl 63 has two key functions. The first is to prevent the pipe from angularly deviating due to vibration or cutting force reaction during the laser cutting process. During laser cutting, the high-energy light beam will produce an instantaneous impact force on the pipe, and the tight engagement of the pawl 63 and the ratchet teeth can offset the impact force, ensuring that the pipe angle is stable at the target value. The second is to achieve stepped and precise control of the angle. The ratchet tooth spacing of the ratchet 62 is controlled so that each tooth corresponds to an angle increment. Combined with the pulse control of the servo motor, the angle adjustment accuracy can be improved to meet the needs of high-precision bevel cutting. In addition, the annular groove 611 of the fixing seat 61 provides a stable rotation track for the ratchet 62 to prevent radial deviation during rotation. The positioning angle groove 612 limits the rotation center of the driving gear 65, ensuring that the rotation trajectory of the V-shaped plate 7 is consistent, thereby ensuring the synchronization of the angle adjustment of multiple pipe fittings. Even if multiple steel pipes of different specifications are clamped, the angle of all pipe fittings can be unified through this mechanism, ensuring that the cross-sectional angle after cutting is consistent.

[0032] like Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, both sides of the upper surface of the V-shaped plate 7 are provided with warping edges 701, and the upper surface of the warping edge 701 is fixedly installed with a pipe clamping mechanism 8 by bolts. The pipe clamping mechanism 8 includes an annular base plate 81 fixedly installed on the surface of the warping edge 701, and a beveled boss 811 is provided on the top of the back of the annular base plate 81. The inner side wall of the beveled boss 811 is movably connected to an abutment wheel 82 through a rotating shaft. A threaded hole is provided on the front of the annular base plate 81, and an annular reinforcing rib is fixedly installed on the annular base plate 81 through the threaded hole on one side. 83. The annular reinforcement rib 83 is an elastic structure. A through hole is provided in the middle of one side surface of the annular reinforcement rib 83. An expansion ring 84 is sleeved on the inner arc surface of the through hole of the annular reinforcement rib 83. A hinge portion 841 is provided on the back of one side surface of the expansion ring 84. The expansion ring 84 is fixedly connected to the annular reinforcement rib 83 through the hinge portion 841. A deformation cavity is provided on the outer arc surface of the expansion ring 84 away from the hinge portion 841. A circular support ring 85 is fixedly installed on the side of the annular reinforcement rib 83 away from the hinge portion 841.

[0033] The outer arc surface of the circular support ring 85 is connected to the connecting lock rod 851, and the half-edge clamp arm A86 is sleeved on one side of the inner arc surface of the connecting lock rod 851, and the half-edge clamp arm B87 is sleeved on the other side of the inner arc surface of the connecting lock rod 851. The half-edge clamp arm A86 and the half-edge clamp arm B87 are both provided with an arc surface 88 on one side, and the arc surface 88 and the through hole on one side of the annular reinforcement rib 83 are in the same plane. Connecting holes 89 are provided on the top and bottom of one side surface of the half-edge clamp arm B87 and the half-edge clamp arm A86, and the inner arc surface of the connecting hole 89 is passed through and connected with a clamping tension spring 810. There are two clamping tension springs 810, which are placed on the top and bottom of the arc surface 88. The outer arc surface of the half-edge clamp arm B87 and the half-edge clamp arm A86 is provided with a semicircular portion 812, and the outer arc surface of the semicircular portion 812 is in contact with the bottom surface of the connecting lock rod 851.

[0034] When the stainless steel pipe enters the clamping area, the annular reinforcement rib 83 will automatically produce radial deformation according to the outer diameter of the pipe due to its elastic adaptation effect. For pipes with larger diameters, the reinforcement rib will expand outward to accommodate the pipe, and for pipes with smaller diameters, the reinforcement rib will shrink inward to be close to the surface of the pipe. This deformation ability enables the mechanism to initially adapt to the specifications of common stainless steel pipes. The expansion ring 84 nested in the through hole of the annular reinforcement rib 83 further improves the adaptation accuracy. The outer arc surface away from the hinge part 841 is provided with a deformation cavity, which can compensate for the size difference caused by different pipe diameters through local wrinkle deformation. When the pipe passes through the expansion ring 84, the cavity will adaptively adjust with the outer diameter of the pipe. The larger the pipe diameter, the higher the degree of expansion of the cavity, and the overall outer diameter of the expansion ring 84 increases accordingly. The smaller the pipe diameter, the more obvious the contraction of the cavity, and the outer diameter of the expansion ring 84 decreases accordingly, ultimately forming a preliminary positioning in which the inner arc surface of the expansion ring 84 and the outer surface of the pipe form a close fit. At the same time, the abutment wheel 82 on the back side of the annular base plate 81 limits the displacement of the pipe from the end. The abutment wheel 82 rotates flexibly through the rotating shaft inside the beveled boss 811. When the end of the pipe contacts it, the wheel body rotates synchronously with the advancement of the pipe, which not only avoids damage to the pipe caused by rigid collision, but also assists in axial positioning of the pipe through the friction force of the wheel surface, ensuring that the ends of multiple pipes are on the same reference plane. Based on elastic adaptation, half-edge clamping arm A86 and half-edge clamping arm B87 achieve rigid clamping via a tension spring 810. The two clamping arms are respectively sleeved onto the inner curved surface of the connecting lock rod 851. The top and bottom connection holes 89 are connected by the tension spring 810, forming a symmetrical tension structure. When the pipe is in place, the contraction force of the tension spring drives the two clamping arms to rotate inward around the connecting lock rod 851, causing the inner curved surface 88 of the clamping arms to gradually wrap around the outer surface of the pipe. The arc surface 88 adopts a contoured design, and its curvature matches the outer curvature of the stainless steel pipe, which can maximize the contact area to disperse the clamping force. For pipes with thinner walls, the arc surface 88 can avoid local crushing by increasing the contact area. For pipes with thicker walls, the arc surface 88 can transmit greater clamping force through close fit. At the same time, the semicircular portion 812 of the outer arc surface of the clamping arm always remains in contact with the bottom surface of the connecting locking rod 851. This support structure can prevent the clamping arm from tilting laterally during the clamping process, ensuring that the clamping force is evenly distributed radially.

[0035] During laser cutting, the pipe will be subjected to high-frequency vibration and thermal stress shock. The pipe clamping mechanism 8 offsets these interferences through multiple structural designs. The elastic recovery force of the annular reinforcement rib 83 continuously acts on the surface of the pipe to form dynamic pressure compensation. When the pipe produces a small displacement due to vibration, the reinforcement rib will quickly adjust the deformation direction and push the pipe back to its original position through the reaction force. like Figure 1As shown, sliding guide rails 9 are provided on the end faces of both sides of the bed base 5, and the inner wall of the sliding guide rails 9 is slidably clamped with a driving side plate 10, and a horizontal driving source 11 is fixedly installed in the middle of one side surface of the two driving side plates 10, and the upper surface of the horizontal driving source 11 is connected to the longitudinal driving source 12, and a cantilever beam 13 is fixedly installed on the end face of the longitudinal driving source 12, and a laser cutting head 14 is fixedly installed on one side of the cantilever beam 13, and a sensor is provided on the top of the laser cutting head 14, and the laser cutting head 14 and the pipe clamping mechanism 8 are in the same plane.

[0036] After completing the clamping and angle adjustment of the pipe fittings, the transverse drive source 11 and the longitudinal drive source 12 start to work together. The transverse drive source 11 is usually a high-precision servo motor with a ball screw structure, which can drive the driving side plate 10 to move laterally along the sliding guide rails 9 on both sides of the bed base 5, and then drive the longitudinal drive source 12, the cantilever beam 13 and the laser cutting head 14 to adjust the transverse position. The longitudinal drive source 12 also adopts a servo drive method, which can drive the cantilever beam 13 to move in a direction perpendicular to the transverse direction, thereby realizing the longitudinal position adjustment of the laser cutting head 14. The sensor on top of the laser cutting head 14 will scan and detect the position of the pipe in real time, and convert the detected position information into an electrical signal and feed it back to the control system. The control system continuously adjusts the operating parameters of the horizontal drive source 11 and the longitudinal drive source 12 according to the preset cutting path and the real-time position data fed back by the sensor to ensure that the laser cutting head 14 can accurately align with the line to be cut of the pipe. When the laser cutting head 14 reaches the starting position and completes positioning and calibration, its internal laser generator emits a high-energy-density laser beam. After being focused by the optical path system, the laser beam forms a tiny spot at the part of the pipe to be cut, instantly heating the local area of ​​the stainless steel pipe to melting or even vaporization temperature. Simultaneously, the auxiliary gas ejected from the cutting head blows away the molten or vaporized metal debris, forming a smooth cut surface. Throughout the cutting process, the laser cutting head 14 moves along a pre-set trajectory, simultaneously cutting multiple clamped stainless steel pipes, efficiently completing the specified length processing task.

[0037] Detailed description of processing method: The operator first screens the stainless steel pipes that need to be cut to ensure that there are no obvious deformation, scratches or other defects on the surface of the pipes. Then, the screened stainless steel pipes are neatly arranged on the conveying plate 101, and a certain distance is maintained between adjacent pipes to avoid collisions during transportation. According to the length and diameter specifications of the pipe fittings, the operator needs to make adaptive adjustments to the pipe clamping mechanism 8. For pipe fittings with large diameter differences, the deformation cavity area of ​​the expansion ring 84 is gently moved by special tools to adjust its initial deformation degree so that it can better adapt to the outer diameter of the pipe fitting; for pipe fittings with thinner walls or softer materials, the pre-tightening force of the tension spring 810 is reduced by adjusting the hook position of the clamping tension spring 810 to prevent the clamping force from being too large and causing deformation of the pipe fitting. For pipe fittings with thicker walls, the pre-tightening force of the clamping tension spring 810 is increased to ensure stable clamping. After the adjustment is completed, check whether the various components of the pipe clamping mechanism 8 are firmly connected to ensure that they can perform their clamping function normally. The pneumatic push rod 3 on the longitudinal rail plate 2 responds, and the air pump inside it starts working, passing compressed air into the cylinder, pushing the piston rod downward, so that the transmission wheel 4 is in close contact with the surface of the stainless steel pipe on the conveying plate 101. At this time, the driving motor of the transmission wheel 4 is started, and the motor output shaft drives the transmission wheel 4 to rotate through the reducer. During the rotation process, the transmission wheel 4 uses the friction between the pipe and the pipe to push the pipe smoothly along the grid 102. When the pipe passes through the notch 103, the guide plates on both sides of the notch 103 will slightly squeeze and correct the pipe to ensure that the axis of the pipe is consistent with the clamping center of the pipe clamping mechanism 8. As the pipe continues to be conveyed, its end eventually contacts the abutment wheel 82. The rotation of the abutment wheel 82 will slow down the forward speed of the pipe until the pipe stops axial movement, completing the automatic conveying process.

[0038] When the end of the pipe comes into contact with the abutment wheel 82 and stops moving, the clamping system of the pipe clamping mechanism 8 is automatically started, and the annular reinforcement rib 83 further fits the outer surface of the pipe under the action of its own elastic force. The deformation cavity of the expansion ring 84 completes the final adaptive deformation according to the actual diameter of the pipe. At the same time, the clamping tension spring 810 generates a contraction force, pulling the half-edge clamp arm A86 and the half-edge clamp arm B87 to rotate inward, and the arc surface 88 gradually hugs the outer surface of the pipe. During the clamping process, if a pipe is found to be clamped too loosely, the position of the connecting lock rod 851 can be manually adjusted to increase the pressure of the half-edge clamping arm on the pipe. If it is found that the clamping is too tight and causes the pipe to be deformed, the clamping spring 810 can be appropriately loosened. After all pipes are firmly clamped, the locking device of the clamping mechanism will automatically start to fix the position of the half-edge clamping arm A86 and the half-edge clamping arm B87 to prevent loosening during the cutting process. The cutting length is precisely set according to actual needs. The driving gear 65 starts to rotate under the drive of the servo motor, driving the pipe clamping mechanism 8 and the pipe fitting to rotate through the V-shaped plate 7. The current angle value will be displayed in real time on the display screen of the control system. When it rotates to the preset angle, the driving gear 65 automatically stops rotating. At this time, the ratchet 62 and the pawl 63 are tightly engaged under the action of the reset spring 64, firmly locking the angle of the pipe fitting. The operator can make a second confirmation through the angle calibrator. After receiving the cutting signal, the transverse drive source 11 and the longitudinal drive source 12 start to drive the laser cutting head 14 to move according to the preset program. The transverse drive source 11 drives the laser cutting head 14 to move transversely along the sliding guide rail 9 to adjust the position of the cutting head in the horizontal direction. The longitudinal drive source 12 drives the laser cutting head 14 to move longitudinally along the cantilever beam 13 to adjust the position of the cutting head perpendicular to the transverse direction.

[0039] When the laser cutting head 14 moves to the starting position for cutting, the sensor on its top will emit a detection beam to scan the actual position of the pipe. The sensor will transmit the scanned position data to the control system. After the control system analyzes and processes the data, it will fine-tune the position of the laser cutting head 14 to ensure that the laser focus of the cutting head falls accurately on the line to be cut of the pipe. After the calibration is completed, the laser cutting head 14 emits a laser beam and cuts multiple pipes at the same time according to the preset cutting path. During the cutting process, auxiliary gas is continuously ejected to blow away the slag generated by the cutting in time to ensure a smooth and neat cut section. After cutting is complete, the laser cutting head 14, driven by the drive source, returns to its initial position. The clamping spring 810 of the tube clamping mechanism 8 automatically relaxes, and the semi-edge clamping arms A86 and B87 open outward, releasing the clamped tube. The cut tube then falls from the tube clamping mechanism 8 under its own weight, sliding through the guide chute below the bed base 5 into the material collection area. At the same time, the pneumatic push rod 3 is started again, and the conveying wheel 4 continues to push the next batch of stainless steel tubes on the conveying plate 101 to the tube clamping mechanism 8, repeating the above-mentioned clamping, angle adjustment, cutting and other processes to achieve continuous batch processing. The operator only needs to regularly replace the material frame in the collection area and replenish the stainless steel tubes to be processed to the conveying plate 101 in time.

[0040] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" 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 should not be understood as limiting the scope of protection of the present invention.

[0042] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A batch stainless steel tube automatic laser cutting mechanism, characterized by: The invention comprises a frame (1), wherein a mounting back plate is fixedly mounted on the upper surface of the frame (1), a conveying plate (101) is provided on the upper surface of the mounting back plate, a grille (102) is provided on the upper surface of the conveying plate (101), a longitudinal rail plate (2) is fixedly mounted on one side edge of the upper surface of the frame (1), a pneumatic push rod (3) is provided on one side edge of the longitudinal rail plate (2), a conveying wheel (4) is fixedly mounted on the middle part of the lower surface of the pneumatic push rod (3), the conveying wheel (4) and the conveying plate (101) on one side are in the same plane, a notch (103) is provided on the side of the frame (1) close to the conveying plate (101), a bed base (5) is fixedly mounted on one side surface of the frame (1), a transverse plate is fixedly mounted on one side edge of the upper surface of the bed base (5), and the transverse plate on the bed base (5) is connected to a changing mechanism (6); The changing mechanism (6) includes a fixed seat (61) connected to an end surface of one side of the horizontal plate, an annular groove (611) is provided in the middle of the upper surface of the fixed seat (61), a positioning angle groove (612) is provided on the side of the fixed seat (61) close to the annular groove (611), and a peripheral groove is provided on the side of the fixed seat (61) close to the annular groove (611), the inner bottom wall of the annular groove (611) is movably connected to a ratchet (62) via a rotating shaft, a pawl (63) is movably engaged at the ratchet teeth of the outer arc surface of the ratchet (62), one side of the lower surface of the pawl (63) is movably connected to the peripheral groove via a rotating shaft, one side of the upper surface of the pawl (63) is connected to a reset tension spring (64), the inner bottom wall of the positioning angle groove (612) is movably connected to a driving gear (65) via a rotating shaft, and a V-shaped plate (7) is fixedly mounted on the upper surface of the driving gear (65).

2. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 1, characterized in that: Both sides of the upper surface of the V-shaped plate (7) are provided with warping edges (701), and a pipe clamping mechanism (8) is fixedly mounted on the upper surface of the warping edge (701) by bolts. The pipe clamping mechanism (8) comprises an annular base plate (81) fixedly mounted on the surface of the warping edge (701), and a beveled edge boss (811) is provided on the top of the back surface of the annular base plate (81).

3. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 2, characterized in that: The inner side wall of the beveled boss (811) is movably connected to an abutment wheel (82) via a rotating shaft. A threaded hole is provided on the front of the annular base plate (81). An annular reinforcing rib (83) is fixedly mounted on the annular base plate (81) via the threaded hole on one side. The annular reinforcing rib (83) is an elastic structure. A through hole is provided in the middle of one side surface of the annular reinforcing rib (83). An expansion ring (84) is sleeved on the inner arc surface of the through hole of the annular reinforcing rib (83).

4. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 3, characterized in that: A hinge portion (841) is provided on the back of one side surface of the expansion ring (84), and the expansion ring (84) is fixedly connected to the annular reinforcement rib (83) through the hinge portion (841). A deformation cavity is provided on the outer arc surface of the expansion ring (84) away from the hinge portion (841), and a circular support ring (85) is fixedly installed on the side of the annular reinforcement rib (83) away from the hinge portion (841).

5. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 4, characterized in that: The outer arc surface of the circular support ring (85) is connected to a connecting lock rod (851), one side of the inner arc surface of the connecting lock rod (851) is sleeved with a half-edge clamp arm A (86), and the other side of the inner arc surface of the connecting lock rod (851) is sleeved with a half-edge clamp arm B (87), and one side of each of the half-edge clamp arm A (86) and the half-edge clamp arm B (87) is provided with an arc surface (88).

6. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 5, characterized in that: The arcuate surface (88) and the through hole on one side of the annular reinforcement rib (83) are in the same plane, and the top and bottom of one side surface of the half-edge clamp arm B (87) and the half-edge clamp arm A (86) are both provided with connecting holes (89).

7. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 6, characterized in that: The inner arc surface of the connecting hole (89) is connected with a clamping spring (810), and the number of the clamping springs (810) is two and they are placed at the top and bottom of the arc surface (88). The outer arc surfaces of the half-edge clamp arm B (87) and the half-edge clamp arm A (86) are both provided with a semicircular portion (812), and the outer arc surface of the semicircular portion (812) is in contact with the bottom surface of the connecting lock rod (851).

8. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 2, characterized in that: Sliding guide rails (9) are provided on both side end surfaces of the bed base (5), and a driving side plate (10) is slidably connected to the inner side wall of the sliding guide rail (9), and a transverse driving source (11) is fixedly installed in the middle of one side surface of the two driving side plates (10), and the upper surface of the transverse driving source (11) is connected to the longitudinal driving source (12).

9. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 8, characterized in that: A cantilever beam (13) is fixedly mounted on the end face of the longitudinal drive source (12), a laser cutting head (14) is fixedly mounted on one side of the cantilever beam (13), a sensor is provided on the top of the laser cutting head (14), and the laser cutting head (14) and the pipe clamping mechanism (8) are located in the same plane.

10. An automatic laser cutting mechanism for batch stainless steel pipes and a processing method thereof, the method using the automatic laser cutting mechanism for batch stainless steel pipes according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Material preparation: The stainless steel pipe to be cut is neatly placed on the conveying plate (101). According to the length and diameter of the pipe, the deformation degree of the expansion ring (84) and the pre-tightening force of the clamping spring (810) are adjusted to adapt the pipe clamping mechanism (8) to the pipe specifications; S2, automatic conveying: start the pneumatic push rod (3), the conveying wheel (4) pushes the pipe along the conveying plate to the notch (103), the pipe enters the clamping range of the pipe clamping mechanism through the notch, and the abutting wheel (82) positions the end of the pipe; S3. Clamping and fixing: After the pipe fitting enters the clamping area, the half-edge clamping arm A (86) and the half-edge clamping arm B (87) automatically clamp the pipe fitting under the action of the clamping tension spring (810), completing the synchronous fixing of multiple pipe fittings; S4, parameter setting and adjustment: the cutting length and laser power parameters are set through the control system, the driving gear (65) drives the V-shaped plate (7) to adjust the angle of the pipe, and the ratchet (62) and the pawl (63) lock the angle position; S5, laser cutting: the transverse driving source (11) and the longitudinal driving source (12) drive the laser cutting head (14) to move to the cutting starting position, and after the sensor calibrates the position of the pipe, the laser cutting head starts and cuts multiple pipes simultaneously along the preset path; S6, unloading and circulation: After cutting is completed, the tube clamping mechanism is released, and the cut tubes fall to the collection area. The conveyor wheel continues to transport the next batch of tubes, and the steps are repeated to achieve continuous batch processing.

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