Intelligent laser cutting equipment for automobile air bag production

Abstract

The application discloses an intelligent laser cutting equipment for automobile air bag production and relates to the technical field of automobile air bag production.The equipment comprises an electrical cabinet, a remote control terminal is arranged on one side of the electrical cabinet, a cutting table is arranged above the electrical cabinet, guide rail tables are arranged on the two sides of the cutting table, a guide rail one and a linear motor are arranged above the guide rail tables along the one side to the other side of the cutting table, a sliding block is slidably connected to the top of the guide rail one, a cross beam is fixedly connected to the top of the sliding block, a screw rod is connected to the bearings at the two ends of the guide rail one, the screw rod is arranged on the sliding block and is threadedly connected with the sliding block, a cover is fixedly connected to the bottom of a sliding seat arranged on the cross beam, a laser cutting head is arranged in the cover, a connecting box is fixedly connected to one side of the laser cutting head, and a rotating mechanism is arranged in the connecting box.The application effectively solves the problem of instability during the cutting of automobile air bag cloth.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile airbag production, and in particular to intelligent laser cutting equipment for automobile airbag production. Background Art

[0002] In the automotive industry, airbags are critical safety components, and their production quality is directly related to the safety of passengers. Laser cutting technology, due to its advantages such as high precision, high speed, and minimal heat-affected zone, has been widely used in cutting airbag fabric. However, in the actual laser cutting process, fabric deformation often occurs, seriously affecting cutting accuracy and product quality.

[0003] Existing automotive airbag laser cutting equipment usually uses traditional fixing methods such as mechanical clamping and vacuum adsorption when cutting fabric. However, this is often accompanied by uneven clamping force during mechanical clamping, which causes the fabric to be pulled or squeezed during the cutting process, resulting in deformation. In terms of cutting parameter control, most of the settings rely on manual experience and cannot be adaptively adjusted according to the real-time state of the fabric. When the heat generated during the laser cutting process accumulates to a certain level, the automotive airbag fabric is easily deformed due to thermal expansion and contraction, which in turn affects the accuracy of the cutting trajectory.

[0004] Therefore, there is an urgent need for an intelligent laser cutting equipment for automobile airbag production to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent laser cutting device for automobile airbag production to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an intelligent laser cutting device for automobile airbag production, comprising an electrical cabinet, a remote control terminal is provided on one side of the electrical cabinet, a cutting table is installed above the electrical cabinet, and guide rail tables are installed on both sides of the cutting table;

[0007] A guide rail 1 and a linear motor are installed above the guide rail table along one side of the cutting table to the other side. A slider is slidably connected to the top of the guide rail 1, and a crossbeam is fixedly connected to the top of the slider. A screw rod is connected to the bearings at both ends of the guide rail 1. The screw rod is passed through the slider and is threadedly connected to the slider. One end of the screw rod is connected to a rotating motor 1 through a pulley and a belt. The rotating motor 1 is installed in an electrical cabinet, and the sliding of the crossbeam on the guide rail 1 is achieved by driving the rotating motor 1.

[0008] The lower part of the beam provided with the sliding seat is fixedly connected with a cover, the inside of the cover is provided with a laser cutting head, one side of the laser cutting head is fixedly connected with a connecting box, the inside of the connecting box is provided with a rotating mechanism.

[0009] According to the above technical scheme, one side of the beam is provided with a guide rail two, the sliding seat is slidingly connected on the guide rail two, and the laser cutting head is connected with a laser generator in the electrical cabinet through an optical fiber.

[0010] According to the above technical scheme, the rotating mechanism comprises a spherical groove wheel and a rotating motor, the spherical groove wheel is connected in the connecting box through a rod bearing, the rotating motor is fixedly connected with a rotating disc through a shaft coupling, one side of the rotating disc is fixedly connected with a lever, and the lever is inserted into the U-shaped groove of the spherical groove wheel in sequence after rotation, so that the rotation of the spherical groove wheel is poked.

[0011] According to the above technical scheme, the bottom of the rod of the spherical groove wheel is fixedly connected with a supporting rod, the bottom end of the supporting rod is fixedly connected with a camera, the camera integrates image processing and positioning functions, monitors the cutting path of the laser cutting head in real time, and rotates synchronously with the spherical groove wheel.

[0012] According to the above technical scheme, one side of the beam is fixedly connected with a support, the lower part of the support is provided with an electric sliding rail, the electric sliding rail is fixedly connected with an air cylinder through a sliding piece, the telescopic end of the air cylinder is fixedly connected with a positioning box, and the upper part of the positioning box is fixedly connected with a convex pipe.

[0013] According to the above technical scheme, the inside of the positioning box is fixedly connected with a H-shaped frame, a cylindrical cam is arranged in the inside of the H-shaped frame, the cylindrical cam is connected on the inner wall of the positioning box through a bearing, the bottom of the cylindrical cam is fixedly connected with a connecting rod one, the bottom of the connecting rod one is fixedly connected with a first smoothing roller, one side of the H-shaped frame is provided with a displacement rod, the middle part of the displacement rod is welded with a driving rod, the driving rod is slidingly connected on the surface of the cylindrical cam, and the bottom of the displacement rod is fixedly connected with a second smoothing roller.

[0014] According to the above technical scheme, the upper part of the linear motor is fixedly connected with a positioning frame through a moving part, the inside of the positioning frame is provided with an electric push rod, and the output end of the electric push rod is fixedly connected with a pneumatic clamp.

[0015] According to the above technical solution, the discharging mechanism is arranged above the side of the cutting table away from the remote control end, and the discharging mechanism includes a cloth rack, a cloth roll and a discharging roller. Positioning rings are provided at both ends of the cloth rack, and a connecting rod 1 is fixedly connected to the positioning ring on one side, and the other end of the connecting rod 1 is connected to the first rotating shaft with a bearing, and one end of the first rotating shaft is fixedly connected to the rotating motor 2 through a belt and a pulley; one end of the discharging roller is fixedly connected to a driving gear, and the driving gear is meshed with a driven gear, and the driven gear is fixedly connected to the second rotating shaft, and a discharging tray is provided on the second rotating shaft.

[0016] According to the above technical solution, a protrusion is fixedly connected to one side of the discharge tray, and a telescopic block is elastically connected to the inside of the protrusion through a compression spring. A pressure sensor is arranged between the bottom of the telescopic block and the inner wall of the protrusion, and the pressure sensor transmits signals to the PLC control system of the electrical cabinet through the remote control end.

[0017] According to the above technical solution, a clamp is fixedly connected to one end of the cutting table close to the remote control end. The clamp is pneumatically driven to open and close by a solenoid valve controlled by a PLC, and works in conjunction with the pneumatic clamp to achieve centering of the cloth.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention monitors the cutting path of the laser cutting head in real time by providing a camera with integrated image processing and positioning functions driven by a rotating mechanism, cooperates with the telescopic block with a pressure sensor in the discharge mechanism to detect the thickness of the automobile airbag fabric and feeds back to the PLC control system, dynamically adjusts the power of the laser cutting head, and at the same time utilizes the first smoothing roller and the second smoothing roller driven by the cylindrical cam to adaptively compensate for the thickness change of the automobile airbag fabric and smooth out wrinkles, thereby solving the problem of low cutting accuracy caused by fabric deformation of traditional equipment, realizing real-time verification of the cutting path, adaptive adjustment of cutting parameters and dynamic smoothing of fabric, and significantly improving the accuracy and stability of automobile airbag fabric cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the crossbeam of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure inside the connection box of the present invention;

[0023] Figure 4Schematic diagram of the structure of the support of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure inside the positioning box of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the cutting table of the present invention;

[0026] Figure 7 This invention Figure 6 Schematic diagram of the enlarged structure of area A in the middle;

[0027] Figure 8 It is a structural schematic diagram of the cloth rack of the present invention;

[0028] Figure 9 It is a structural schematic diagram of the discharge mechanism of the present invention;

[0029] Figure 10 It is a schematic diagram of the internal structure of the discharge tray of the present invention;

[0030] Figure 11 This invention Figure 10 Schematic diagram of the enlarged structure of the middle B area;

[0031] Figure 12 Schematic diagram of smoothing the concave fabric in the thin area of ​​the present invention;

[0032] In the figure: 1. Electrical cabinet; 2. Remote control terminal; 3. Cutting table; 4. Guide rail table; 5. Guide rail 1; 6. Linear motor; 7. Crossbeam; 8. Slider; 9. Guide rail 2; 10. Sliding seat; 11. Cover; 12. Laser cutting head; 13. Connecting box; 14. Rotating mechanism; 141. Spherical sheave; 142. Turntable; 143. Lever; 144. Rotating motor; 15. Support rod; 16. Camera; 17. Bracket; 18. Electric slide; 19. Cylinder; 20. Positioning box; 21. Convex pipe; 22.匚-shaped frame; 23. Cylindrical cam; 24. Connecting rod one; 25. First smoothing roller; 26. Displacement rod; 27. Driving rod; 28. Second smoothing roller; 29. ​​Positioning frame; 30. Pneumatic clamp; 31. Fabric frame; 32. Fabric roll; 33. Positioning ring; 34. Connecting rod one; 35. First rotating shaft; 37. Driving gear; 38. Discharge roller; 39. Connecting rod two; 40. Second rotating shaft; 41. Driven gear; 42. Discharge tray; 43. Bump; 44. Telescopic block; 45. Connecting rod three; 46. Clamp. DETAILED DESCRIPTION

[0033] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0034] Please refer to Figure 1-12 , the present application provides technical solutions: an intelligent laser cutting equipment for automobile air bag production, including an electrical cabinet 1, an industrial-grade PLC control system and a power distribution module are integrated inside, used for wiring and management of each electrical component, a remote control end 2 is arranged on one side of the electrical cabinet 1, connected with the control system signal of the electrical cabinet 1, used for collecting, processing and feedback of cutting parameters, and presetting of cutting route at the same time, a cutting table 3 is installed above the electrical cabinet 1, used for cutting operation of air bag cloth, guide rail tables 4 are installed on both sides of the cutting table 3, realizing the guiding arrangement of moving parts.

[0035] A guide rail one 5 and a linear motor 6 are respectively installed above the guide rail tables 4 from one side to the other side of the cutting table 3, a sliding block 8 is slidingly connected above the guide rail one 5, a cross beam 7 is fixedly connected above the sliding block 8, bearings are connected at both ends of the guide rail one 5, a lead screw is connected with the sliding block 8 and screwed with the sliding block 8, one end of the lead screw is connected with a rotary motor one through a belt pulley and a belt, the rotary motor one is installed in the electrical cabinet 1, the rotation of the lead screw is realized through the driving of the rotary motor one, and the sliding of the cross beam 7 on the guide rail one 5 is realized.

[0036] As Figure 2 shown, a guide rail two 9 is installed on one side of the cross beam 7, the guide rail two 9 is a linear rolling guide pair, equipped with a grating ruler displacement detection system, realizing high-precision positioning, a sliding seat 10 is slidingly connected on the guide rail two 9, the sliding seat 10 is fixedly connected with a servo motor through a ball screw pair, a housing 11 is fixedly connected below the sliding seat 10, a laser cutting head 12 is installed inside the housing 11, the laser cutting head 12 is connected with a laser generator in the electrical cabinet 1 through an optical fiber, used for cutting operation.

[0037] As Figure 2 , 3As shown, a connecting box 13 is fixedly connected to one side of the laser cutting head 12 inside the cover 11, and a rotating mechanism 14 is installed inside the connecting box 13. The rotating mechanism 14 includes a spherical groove wheel 141. The spherical groove wheel 141 is a hemispherical structure with four U-shaped grooves evenly opened on the top. The spherical groove wheel 141 is connected to the connecting box 13 through a rod bearing. A rotating motor 144 is installed on the inner wall of the connecting box 13. The rotating motor 144 is fixedly connected to a turntable 142 through a coupling. A shift rod 143 is fixedly connected to one side of the turntable 142. After the shift rod 143 is rotated, it is inserted into the U-shaped groove in turn, thereby shifting the rotation of the spherical groove wheel 141.

[0038] The bottom of the rod of the spherical groove wheel 141 is fixedly connected to a support rod 15. The support rod 15 is a rod structure with a bent middle part. The bottom end of the support rod 15 is fixedly connected to a camera 16. The camera 16 integrates image processing, positioning and temperature monitoring functions, monitors the cutting path of the laser cutting head 12 in real time and collects the temperature data of the cutting area. The monitoring data is transmitted to the PLC control system of the electrical cabinet 1 through the signal cable in the rod of the spherical groove wheel 141. The camera 16 rotates synchronously with the spherical groove wheel 141, and the rotation angle range is 0°~270°. A path verification is completed every 90° rotation.

[0039] like Figure 2 、 4 As shown, a bracket 17 is fixedly connected to one side of the beam 7, an electric slide rail 18 is installed under the frame of the bracket 17, a cylinder 19 is fixedly connected to the electric slide rail 18 through a sliding part, and a positioning box 20 is fixedly connected to the telescopic end of the cylinder 19 for achieving path following with the laser cutting head 12.

[0040] like Figure 5As shown, a convex tube 21 is fixedly connected to the top of the positioning box 20, and a convex frame 22 is fixedly connected to the interior of the positioning box 20. A cylindrical cam 23 is passed through the interior of the convex frame 22. The cylindrical cam 23 adopts a symmetrical contour design to adapt to the two-way compensation of the thickness change of the automobile airbag. The cylindrical cam 23 is connected to the inner wall of the positioning box 20 through a bearing. The bottom of the cylindrical cam 23 is fixedly connected to a connecting rod 24. The bottom of the connecting rod 24 is fixedly connected to a first smoothing roller 25. A displacement rod 26 is passed through one side of the convex frame 22. The upper end of the displacement rod 26 is connected to the convex Inside the tube 21 (not shown in the figure), a driving rod 27 is welded to the middle of the displacement rod 26, and the driving rod 27 is slidably connected to the surface of the cylindrical cam 23. The bottom of the displacement rod 26 is fixedly connected to the second smoothing roller 28. The cylinder 19 moves in the Y direction in the direction of the electric slide 18 and moves synchronously along the X direction with the crossbeam 7, thereby realizing the positioning of the positioning box 20. After the cylinder 19 is extended, the first smoothing roller 25 and the second smoothing roller 28 are in contact with the automobile airbag on the surface of the cutting table 3. When the automobile airbag becomes thicker, the displacement rod 26 moves up, and the driving rod 27 drives the cylindrical cam 23 (according to Figure 5 As shown in FIG, the first smoothing roller 25 is driven to rotate clockwise to enhance the smoothing effect of the raised area.

[0041] When the second smoothing roller 28 encounters a thinning of the automobile airbag, the displacement rod 26 moves downward, and the driving rod 27 drives the cylindrical cam 23 to make the first smoothing roller 25 rotate counterclockwise, always in contact with the surface of the automobile airbag, and the pressure is uniform.

[0042] like Figure 6-9 As shown, a positioning frame 29 is fixedly connected to the top of the linear motor 6 through a mover, an electric push rod is installed inside the positioning frame 29, and a pneumatic clamp 30 is fixedly connected to the output end of the electric push rod to enable the pneumatic clamp 30 to slide along the direction of the linear motor 6.

[0043] A feeding mechanism is provided above the side of the cutting table 3 away from the remote control end 2, which cooperates with the pneumatic clamp 30 to feed the material synchronously. The feeding mechanism includes a cloth rack 31, which is fixedly connected to the top of the cutting table 3. A cloth roll 32 is provided on the cloth rack 31, and positioning rings 33 are provided at both ends of the cloth rack 31. A connecting rod 34 is fixedly connected to the positioning ring 33 on one side, and a first rotating shaft 35 is connected to the bearing at the other end of the connecting rod 34. One end of the first rotating shaft 35 is fixedly connected to the rotating motor 2 through a belt and a pulley, so that the rotation of the first rotating shaft 35 is realized by the drive of the rotating motor 2, and the rotation angle is precisely controlled by the PLC.

[0044] One end of the first rotating shaft 35 is fixedly connected to a driving gear 37, and a discharging roller 38 is fixedly connected to the first rotating shaft 35, and its surface is knurled to prevent the automobile airbag from slipping; the other end of the discharging roller 38 is connected to a connecting rod 4 with a bearing, and the other end of the connecting rod 4 is fixedly connected to the positioning ring 33 on the other side, and the connecting rod 1 34 is fixedly connected to the connecting rod 2 39, and the other end of the connecting rod 2 39 is connected to the second rotating shaft 40 with a bearing, and one end of the second rotating shaft 40 is fixedly connected to the driven gear 41, and the driving gear 37 is meshed with the driven gear 41. A discharging tray 42 is sleeved on the second rotating shaft 40, and a protrusion 43 is fixedly connected to one side of the discharging tray 42. The interior of the protrusion 43 is elastically connected to a telescopic block 44 through a compression spring, so that when the surface of the telescopic block 44 touches the automobile airbag of different thicknesses, the discharging tray 42 is fixedly connected to the first rotating shaft 35, and the discharging roller 38 is fixedly connected to the first rotating shaft 35. When the car airbag contacts, the telescopic block 44 will expand and contract inside the protrusion 43, and the spring force will be fed back to the PLC, which will adjust the rotation speed of the discharge roller 38 in real time to compensate for the elastic deformation of the car airbag. The specific compensation process is: the pressure sensor at the bottom of the telescopic block 44 detects the compression force of the spring in real time. This compression force directly reflects the contact pressure of the telescopic block 44 on the car airbag; when the car airbag becomes thinner due to elastic stretching, that is, the tension increases, the telescopic block 44 will move down further under the action of the spring to maintain contact, resulting in an increase in the spring compression force; conversely, when the car airbag relaxes or thickens, that is, the tension decreases, the spring compression force will decrease; during this process, the PLC control system continuously receives signals from the pressure sensor, and the PLC has a preset reference pressure range that matches the ideal car airbag tension.

[0045] Furthermore, when an increase in pressure is detected, it indicates that the car airbag has become thinner, the tension has increased, and the elastic stretching has intensified. The PLC determines that the current discharge tension is too high and there is a risk of over-stretching the car airbag. At this time, the PLC will reduce the speed of the rotating motor 2 that drives the discharge roller 38, so that the length of the car airbag released per unit time is reduced, thereby reducing the speed at which the car airbag is pulled out, alleviating the stretching degree of the car airbag, giving it more time to rebound, and compensating for the elastic deformation caused by excessive tension.

[0046] When it is detected that the pressure decreases, it indicates that the automobile airbag is relatively loose or thickened, and the tension is insufficient. The PLC determines that the current discharge tension may be too low, which may cause the automobile airbag to accumulate or wrinkle in the cutting area. At this time, the PLC increases the speed of the rotating motor 2, so that the length of the automobile airbag discharged per unit time increases, and the traction force on the cloth roll 32 is increased, so that the automobile airbag maintains a proper tension state, preventing accidental deformation or wrinkles caused by relaxation.

[0047] The other end of the second rotating shaft 40 is fixedly connected to the connecting rod 3 45, and the other end of the connecting rod 3 45 is fixedly connected to the bottom of the connecting rod 1 34 to achieve the stability of the discharge mechanism.

[0048] The first rotating shaft 35 rotates and engages with the driven gear 41 through the driving gear 37, drives the intermittent rotation of the feeding disc 42, so that the protrusion 43 intermittently matches the feeding roller 38 to pull the cloth roll 32. Since the cloth roll 32 as the raw material of the automobile air bag will have high elasticity, the intermittent pulling can realize the rebound of the cloth roll 32 to a certain extent, preventing the continuous pulling from causing the cloth roll 32 to always maintain a tensioned state, thereby preventing the production quality from being reduced.

[0049] The cutting table 3 is fixedly connected with the clamp 46 near one end of the remote control end 2, and the clamp 46 is driven to open and close by the electromagnetic valve controlled by the PLC.

[0050] In the embodiment, the feeding mechanism is used for the preliminary detection and dynamic compensation of the thickness of the automobile air bag, so that the cutting efficiency is effectively improved.

[0051] Specifically, as shown in Figure 10 、 11 The bottom of the telescopic block 44 and the inner wall of the protrusion 43 are provided with a pressure sensor. When the surface of the telescopic block 44 contacts the automobile air bag with different thicknesses, the telescopic block 44 telescopes in the protrusion 43, and the pressure sensor detects the spring force in real time. When the area of the automobile air bag contacted by the telescopic block 44 becomes thicker, the telescopic block 44 is pushed upward, the compression spring between the telescopic block 44 and the protrusion 43 is further compressed, and the spring force detected by the pressure sensor increases. Conversely, when the area of the automobile air bag contacted becomes thinner, the telescopic block 44 moves downward under the action of the spring restoring force, and the spring force detected by the pressure sensor decreases. The pressure sensor transmits the detected spring force signal to the PLC, and the PLC calculates and feeds back the actual automobile air bag thickness h2 according to the corresponding relationship between the spring force and the automobile air bag thickness.

[0052] Meanwhile, the signal is transmitted to the PLC through the remote control end 2. The standard automobile air bag thickness specification for producing the automobile air bag is h1, the thickness error range of the actual automobile air bag is [h, H], h1∈[h, H], wherein h is the minimum lower limit value of the allowable automobile air bag thickness, and when the actual thickness of the automobile air bag is lower than this value, it is considered unqualified; H is the maximum upper limit value of the allowable automobile air bag thickness, and when the actual thickness of the automobile air bag is higher than this value, the cutting quality will be affected.

[0053] When cutting begins, rotary motor 2 starts, and the automobile airbag begins to unwind through the unwinding mechanism. At this time, the unwinding roller 38 rotates synchronously with the unwinding disk 42, and the telescopic block 44 intermittently contacts the surface of the automobile airbag. The pneumatic clamp 30 extends and clamps the end of the cloth roll 32 of the automobile airbag, and moves synchronously with the pulling frequency of the automobile airbag, so that the automobile airbag is divided into several areas equal to the surface area of ​​the telescopic block 44, and the spring pressure feedback from the pressure sensor each time is transmitted to the remote control terminal 2 for recording. The pressure sensor detects the spring force signal in real time each time it contacts the automobile airbag. After receiving the original force signal, the remote control terminal 2 immediately converts it into the actual automobile airbag thickness value h2 corresponding to the contact point according to the preset calibration relationship. The system associates the h2 value obtained each time with the area where the current automobile airbag is detected, and records and stores it, thereby feedbacking the automobile airbag thickness deviation in several areas based on the reading of the pressure sensor.

[0054] When h≤h2

[0055] When h1

[0056] When the airbag is unwound to the end of the linear motor 6, the pneumatic clamp 30 and the clamp 46 work together, that is, the pneumatic clamp 30 first releases the pre-positioned length αmm, clamps the end of the cloth roll 32, and then moves synchronously along the X-axis to ensure the centering accuracy between the end of the airbag and the clamp 46. After the clamp 46 is clamped, the pneumatic clamp 30 returns to its initial position ( Figure 6 As shown in the figure), the second rotating motor stops, causing the discharge tray 42 and the discharge roller 38 to stop rotating, and the automobile airbag located between the telescopic block 44 and the discharge roller 38 is clamped and fixed, thereby achieving the positioning effect of one end of the automobile airbag; the laser cutting head 12 dynamically adjusts the power on the preset cutting route according to the thickness of the remote control terminal 2, thereby achieving the effect of adaptive matching.

[0057] ​​Furthermore, through the above-mentioned distribution record of the thickness of the automobile airbag, the camera 16 can combine the automobile airbag thickness data and the current power, cutting speed and other parameters of the laser cutting head 12, and predict the temperature of the cutting path through the integrated infrared thermal imaging and temperature field analysis function, that is, judge the heat conduction characteristics according to the thickness of the automobile airbag, and then estimate the heat input in combination with the laser parameters, so as to predict the temperature distribution of the cutting area, provide a basis for triggering the smoothing mechanism in advance and adjusting the laser parameters, so as to avoid wrinkles or deformation of the automobile airbag due to heat accumulation.

[0058] Through the above embodiments, production efficiency and intelligence are improved, production data is uploaded in real time, and full digital traceability of the production process is achieved. In addition, through adaptive control of laser power, production energy consumption and automobile airbag loss are greatly reduced, and the overall production cost is simultaneously reduced.

[0059] Example 2, based on Example 1, in this example, since the automobile airbag is cut by the high-temperature laser cutting head 12, the edges of the cut automobile airbag will curl due to the high temperature, so the first smoothing roller 25 and the second smoothing roller 28 are used to smooth it to prevent the cut edge of the automobile airbag from curling up, so as to improve the production quality of the automobile airbag. Since the cut edge of the automobile airbag curls up, the cut edge will be wrinkled, and necessary processing is required to address this situation.

[0060] Specifically, the bracket 17 moves synchronously with the crossbeam 7. When the laser cutting head 12 moves back and forth on the guide rail 2 9, the positioning box 20 moves synchronously along the direction of the electric slide rail 18 to pre-smooth the cutting path; set the laser cutting head 12 to always press Figure 6 The cutting table 3 shown cuts from left to right. When the laser cutting head 12 contacts the fabric above the cutting table 3 and starts cutting, the cylinder 19 drives the second smoothing roller 28 to contact the fabric surface. Similarly, the cylinder 19 drives the second smoothing roller 28 to move a distance equal to the distance from the cutting table to the initial position of the second smoothing roller 28 minus the fabric thickness distance fed back by the pressure sensor, so that the first smoothing roller 25 and the second smoothing roller 28 are always in contact with the surface of the car airbag above the cutting table 3.

[0061] Furthermore, when the cloth becomes thicker, the first smoothing roller 25 will rotate clockwise, and when the cloth becomes thinner, the first smoothing roller 25 will rotate counterclockwise, and the rotation direction is identified and fed back by the camera 16.

[0062] Case 1: When the fabric rotates clockwise, it indicates that wrinkles appear in the automobile airbag above the cutting table 3, resulting in a sudden change in the fabric height: if the current area is in the thickness range of h≤h2

[0063] In the second case, when the fabric rotates counterclockwise, the second smoothing roller 28 sinks due to the loss of support, driving the displacement rod 26 to move downward. The driving rod 27 in the middle of the displacement rod 26 moves downward and slides along the surface contour of the cylindrical cam 23. Figure 5 In the illustrated structure, the downward movement of drive rod 27 forces cylindrical cam 23 to rotate counterclockwise. This counterclockwise rotation of cylindrical cam 23, via connecting rod 1 24, drives the synchronous counterclockwise rotation of first smoothing roller 25 at its base. Therefore, the counterclockwise rotation of first smoothing roller 25 is a direct mechanical feedback result of the reduced thickness of the fabric at that location, indicating a sudden drop in thickness of the airbag fabric above cutting table 3. If the current area falls within the thickness range h ≤ h2 < h1, this indicates a locally thin area in the fabric with low tensile strength, making it susceptible to laser burn-through. At this point, laser cutting head 12 immediately reduces cutting power while simultaneously raising first smoothing roller 25 to maintain a low contact pressure between the roller and the fabric, preventing damage to the thin area. This area is then marked via remote control terminal 2 to facilitate subsequent fabric compensation and other processing.

[0064] If the current area is in the thickness range of h1

[0065] ​​At the same time, the smoothing mechanism performs the following operations: first, the elasticity of the fabric is tested by smoothing for multiple times, and then the pressure and cutting parameters are dynamically adjusted. The specific steps are as follows: the PLC controls the cylinder 19 to drive the positioning box 20 and the second smoothing roller 28, and smoothing pressure of different durations t1 and t2 (t2>t1) is applied in stages; after each smoothing, the second smoothing roller 28 is first lifted to separate from the fabric surface, and then lowered at a constant speed to a preset height in contact with the surface of the car airbag, and the camera 16 captures the movement of the first smoothing roller 28 in real time. 5's rotation frequency changes and is processed by PLC; when smoothing for t1 time, if the speed of the first smoothing roller 25 drops to zero and there is no displacement change, it is determined that the automobile airbag has completed rebound; if the first smoothing roller 25 rotates at a high frequency, it is determined that the airbag has not rebounded, and the smoothing pressure is continued to be applied for t2 time. If the speed of the first smoothing roller 25 drops to zero and there is no displacement change, it indicates that the automobile airbag has rebounded. If the first smoothing roller 25, it indicates that the automobile airbag has poor resilience and the airbag fabric in this area needs to be compensated.

[0066] The positioning box 20 is driven to move downward as a whole, and the vertical pressure of the second smoothing roller 28 on the surface of the cloth is significantly increased by increasing the output pressure of the cylinder 19, so that the increased pressure acts precisely on the transition area between the thin area and the surrounding thick material; Figure 12 As shown, pressure is used to force the thin area depression to be as close to the surface of the cutting table 3 as possible, and the height difference between it and the laser focal plane is controlled within a small range. At the same time, the laser power and cutting speed are dynamically adjusted to avoid rough edges during cutting.

[0067] If this happens more than m times within the same cutting area, it indicates that the fabric is of poor quality and does not meet the high reliability requirements of automobile airbag production. At this point, the system automatically stops cutting and issues an alarm through the remote control terminal 2, prompting the operator to replace the roll with a new qualified fabric roll 32.

[0068] Through the above embodiment, the quality problem caused by fabric deformation during laser cutting is solved. At the same time, the production efficiency and equipment reliability are improved through intelligent means, meeting the requirements of automobile airbag production for high precision and high stability, and having significant industrial application value.

[0069] Example 3, based on Example 2, in this example, due to the high elasticity of automobile airbag fabric, wrinkles will be generated synchronously near the wrinkle area. To address this situation, the camera 16 is driven to flip and observe the fabric condition on the cutting path behind the wrinkle. Combined with the fabric thickness parameter h2 fed back by the pressure sensor and the pressure feedback of the cylinder 19, the abnormal fabric condition is processed in multiple dimensions.

[0070] Specifically, when wrinkles appear on the fabric, if the next preset cutting path is located above the current cutting point, the camera 16 is driven to flip upward to observe the fabric condition within the range of the camera 16. The same applies to other directions. At this time, the PLC synchronously retrieves the thickness parameter h2 of the current wrinkle area and the torque data of the discharge roller 38, and converts them through the current fluctuation of the rotating motor 2.

[0071] Case 1: When the wrinkle area is smaller than 1 / 2 of the shooting area of ​​the camera 16, it is a mild wrinkle.

[0072] The PLC fine-tunes the Y-axis path of the laser cutting head 12 according to the location of the wrinkles to avoid areas where wrinkles are concentrated. At the same time, the electric slide 18 drives the smoothing mechanism and uses the first smoothing roller 25 to quickly iron out minor wrinkles.

[0073] If the wrinkle area corresponds to the area h≤h2

[0074] In the second case, when the wrinkle area is larger than half of the area captured by the camera 16, it is considered severe wrinkle. The laser cutting head 12 stops moving, and the cylinder 19 drives the second smoothing roller 28 to increase pressure. At the same time, the electric slide 18 drives the smoothing mechanism to move in the opposite direction along the X-axis to pre-flatten the wrinkle area.

[0075] The camera 16 then scans again. If the wrinkle area is reduced to less than 1 / 2, cutting is resumed and light wrinkle treatment is performed. If there is no improvement, the clamp 46 is released, the pneumatic clamp 30 stretches the fabric along the Y-axis direction, cooperates with the unwinding mechanism to reversely rewind, and continues cutting after repositioning.

[0076] When the same cloth has severe wrinkles more than n times, the remote control terminal 2 triggers an early warning, prompting the user to replace the cloth roll 32 or check the tension of the unwinding mechanism.

[0077] Furthermore, the temperature of the cut airbag fabric is monitored by the temperature monitoring function of the camera 16, and a high temperature warning is issued when the folds are cut.

[0078] When the camera 16 detects that the temperature of the wrinkle area is greater than T (T is the critical point of thermal deformation of the fabric), the camera 16 automatically rotates toward the subsequent cutting path. ​

[0079] If the camera 16 predicts that there will be continuous areas greater than T in the subsequent cutting path, the smoothing operation is triggered in advance, and the cylinder 19 is driven to increase the pressure to press the second smoothing roller 28 downward to prevent heat accumulation.

[0080] At the same time, the unwinding mechanism is started, and the PLC controls the rotary motor 2 to reverse at a constant low speed. At the same time, the pneumatic clamp 30 synchronously applies reverse traction to slowly rewind the cloth toward the cloth rack 31 until the high-temperature area is separated from the surface of the cutting table 3; during the rewinding process, the pressure sensor monitors the cloth tension in real time to ensure that the tension is maintained within the preset safety range, avoiding excessive pulling that may cause cloth damage, so that the cloth area is stably in a suspended state, achieving the effect of cooling compensation for the cloth.

[0081] Through the above embodiment, wrinkle prediction is performed on fabric, which further improves the equipment's ability to handle complex wrinkles on highly elastic fabrics, and better meets the stringent zero-defect requirements of automobile airbag production.

[0082] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0083] 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 aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An intelligent laser cutting device for automobile airbag production, comprising an electrical cabinet (1), characterized in that: A remote control terminal (2) is provided on one side of the electrical cabinet (1), a cutting table (3) is installed above the electrical cabinet (1), and guide rail tables (4) are installed on both sides of the cutting table (3); A guide rail (5) and a linear motor (6) are respectively installed above the guide rail platform (4) along one side to the other side of the cutting platform (3); a slider (8) is slidably connected to the top of the guide rail (5); a crossbeam (7) is fixedly connected to the top of the slider (8); a screw rod is connected to the bearings at both ends of the guide rail (5); the screw rod is passed through the slider (8) and is threadedly connected to the slider (8); one end of the screw rod is connected to a rotating motor (1) through a pulley and a belt; the rotating motor (1) is installed in the electrical cabinet (1); and the sliding of the crossbeam (7) on the guide rail (5) is achieved by driving the rotating motor (1); A cover (11) is fixedly connected below a sliding seat (10) provided on the crossbeam (7), a laser cutting head (12) is installed inside the cover (11), a connection box (13) is fixedly connected to one side of the laser cutting head (12), a rotating mechanism (14) is installed inside the connection box (13), and a material discharge mechanism is provided above the cutting table (3); The rotating mechanism (14) comprises a spherical sheave (141) and a rotating motor (144), wherein the spherical sheave (141) is connected to the connecting box (13) via a rod bearing, and the rotating motor (144) is fixedly connected to a turntable (142) via a coupling, and a shifting rod (143) is fixedly connected to one side of the turntable (142), and the shifting rod (143) is inserted into the U-shaped groove of the spherical sheave (141) in sequence after being rotated, thereby shifting the rotation of the spherical sheave (141); The bottom of the rod of the spherical groove wheel (141) is fixedly connected to a support rod (15), and the bottom end of the support rod (15) is fixedly connected to a camera (16). The camera (16) integrates image processing and positioning functions, monitors the cutting path of the laser cutting head (12) in real time, and rotates synchronously with the spherical groove wheel (141); A bracket (17) is fixedly connected to one side of the crossbeam (7), an electric slide rail (18) is installed below the bracket (17), a cylinder (19) is fixedly connected to the electric slide rail (18) via a sliding member, a positioning box (20) is fixedly connected to the telescopic end of the cylinder (19), and a convex tube (21) is fixedly connected to the top of the positioning box (20); Inside the positioning box (20), a U-shaped frame (22) is fixedly connected. A cylindrical cam (23) is inserted into the U-shaped frame (22). The cylindrical cam (23) is connected to the inner wall of the positioning box (20) through a bearing. A connecting rod one (24) is fixedly connected to the bottom of the cylindrical cam (23). A first flattening roller (25) is fixedly connected to the bottom of the connecting rod one (24). A displacement rod (26) is inserted into one side of the U-shaped frame (22). A driving rod (27) is welded to the middle of the displacement rod (26). The driving rod (27) is slidably connected to the surface of the cylindrical cam (23). A second flattening roller (28) is fixedly connected to the bottom of the displacement rod (26).

2. The intelligent laser cutting equipment for automobile airbag production according to claim 1 is characterized in that: On one side of the cross beam (7), a guide rail two (9) is installed. The sliding seat (10) is slidably connected to the guide rail two (9). The laser cutting head (12) is connected to the laser generator in the electrical cabinet (1) through an optical fiber.

3. The intelligent laser cutting equipment for automobile airbag production according to claim 1 is characterized in that: Above the linear motor (6), a positioning frame (29) is fixedly connected through a mover. An electric push rod is installed inside the positioning frame (29). The output end of the electric push rod is fixedly connected to a pneumatic clamp (30).

4. The intelligent laser cutting equipment for automobile airbag production according to claim 1 is characterized in that: The feeding mechanism is arranged above one side of the cutting table (3) far away from the remote control end (2). The feeding mechanism includes a fabric rack (31), a fabric roll (32) and a feeding roller (38). Positioning rings (33) are sleeved at both ends of the fabric rack (31). A connecting rod one (34) is fixedly connected to one of the positioning rings (33). The other end of the connecting rod one (34) is connected to a first rotating shaft (35) through a bearing. One end of the first rotating shaft (35) is fixedly connected to a rotating motor two through a belt and a pulley. A driving gear (37) is fixedly connected to one end of the feeding roller (38). The driving gear (37) is meshed with a driven gear (41). The driven gear (41) is fixedly connected to a second rotating shaft (40). A feeding disc (42) is sleeved on the second rotating shaft (40).

5. The intelligent laser cutting equipment for automobile airbag production according to claim 4 is characterized in that: A convex block (43) is fixedly connected to one side of the feeding disc (42). An expansion block (44) is elastically connected to the inside of the convex block (43) through a compression spring. A pressure sensor is arranged between the bottom of the expansion block (44) and the inner wall of the convex block (43). The pressure sensor transmits a signal to the PLC control system of the electrical cabinet (1) through the remote control end (2).

6. The intelligent laser cutting equipment for automobile airbag production according to claim 1 is characterized in that: A clamp (46) is fixedly connected to one end of the cutting table (3) close to the remote control end (2). The clamp (46) is pneumatically driven to open and close through a solenoid valve controlled by a PLC, and cooperates with the pneumatic clamp (30) to realize the centering and positioning of the fabric.

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