Umbrella fabric cutting device based on machine vision

Abstract

The present invention discloses an umbrella fabric cutting device based on machine vision, which relates to the field of fabric cutting technology. It includes a machine platform and a laser cutting head. The machine platform is provided with a three-dimensional movable structure. A crossbeam is provided above the machine platform. A fixed cover is fixed below the crossbeam. The side end of the fixed cover is connected to an air intake pipe. A connecting pipe is provided below the fixed cover. A rotating pipe is rotatably connected below the connecting pipe. Several sliding rods are fixed to the outside of the rotating pipe. A vertical pipe is slidably provided below the sliding rod. A flat air nozzle is connected to the side of the vertical pipe away from the rotating pipe. The present invention blows the fabric through the flat air nozzle. The rotating pipe rotates continuously, so that the blowing effect acts on the fabric all around. The vertical pipe can diffuse toward the edge, so that the blowing effect gradually expands from the center to the edge. Different air intake rates can be selected according to the degree of wrinkles of the fabric. No tension is applied to the fabric. Elastic fabric can be smoothed, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of cloth cutting, and in particular to an umbrella fabric cutting device based on machine vision. Background Art

[0002] Umbrella making is a process involving multiple steps. Usually, the shape of the umbrella cover is determined according to the design and the fabric is cut. Then, the various parts of the umbrella cover are sewn and spliced ​​together to form a complete umbrella cover. At the same time, the umbrella rib frame (including the main ribs, supporting ribs, etc. to ensure flexibility and strength) is made. Then, the umbrella cover and the ribs are assembled through a specific connection method. Finally, the umbrella handle is installed, and the smoothness of the umbrella cover opening and closing, as well as its waterproof performance, are checked to complete the umbrella production.

[0003] When cutting umbrella fabric, a cutting device is required, such as a laser cutting device disclosed in Patent Publication No. CN112828446A, which includes a frame, two sets of conveyor belts, a mounting frame, a horizontally arranged carrying net inside the frame, support blocks and hinged seats on the left and right sides of each set of conveyor belts, a vibration structure arranged below the mounting frame, a laser cutting structure arranged above the carrying net, and a pulling anti-wrinkle structure arranged on both sides of the frame. The vibration structure includes a moving platform and a two-stroke cylinder, a vibration block provided at the telescopic end of the two-stroke cylinder, a rubber cushion provided on the top of the vibration block, and arc-shaped resistance surfaces provided on both sides of the vibration block and the support block. The present invention can vibrate the carrying net through the vibration structure and can cause the carrying net to knock on the bottom of the fabric to accelerate the separation of the fabric from the upper. The pulling anti-wrinkle structure can also make the fabric taut to prevent wrinkles in the fabric during the laser cutting process.

[0004] When cutting the umbrella fabric, it is necessary to ensure that the fabric is in a relatively flat state and to ensure the cutting accuracy of the fabric. The above-mentioned device cannot flatten the fabric according to the degree of wrinkles of the fabric. The cutting effect is poor for fabric with a certain elasticity. When the fabric wrinkles are large, the cutting error is large, which is not conducive to improving the quality of the umbrella. Summary of the Invention

[0005] The purpose of the present invention is to provide an umbrella fabric cutting device based on machine vision to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an umbrella fabric cutting device based on machine vision, comprising a machine platform and a laser cutting head, wherein a three-dimensional movable structure is provided on the machine platform for driving the laser cutting head to cut the fabric, a crossbeam is provided above the machine platform, two support rods are provided at both ends of the crossbeam, and the support rods are slidingly provided on both sides of the machine platform, and a hydraulic cylinder for lifting the crossbeam and a fill light mechanism for shooting fill light are provided on the outside of the support rods, a fixed cover is fixed below the crossbeam, an air intake pipe is connected to the side end of the fixed cover, and a plurality of extension rods are provided on the outside of the fixed cover, A camera is installed, and a connecting pipe is provided under the fixed cover. A rotating tube is rotatably connected to the bottom of the connecting pipe, and a reducing pipe is provided on the inner side of the rotating tube. A central pressure head is provided at the bottom of the reducing pipe for pressing the center of the fabric. Several sliding rods evenly distributed around the circumference are fixed to the outside of the rotating tube, and a vertical tube is slidably provided under the sliding rod. The bottom of the vertical tube is sealed and a flat air nozzle inclined downward is connected to the side away from the rotating tube. A moving mechanism for driving the vertical tube to move horizontally is provided between the sliding rod and the vertical tube, an air supply mechanism is provided between the rotating tube and the vertical tube, and a driving mechanism for driving the rotating tube to rotate is provided on the crossbeam.

[0007] Preferably, the central pressure head includes a lifting tube at the bottom of the sliding reducer, a pressure plate is rotatably provided at the bottom of the lifting tube, and an outward expansion section is provided at the upper end of the lifting tube, and an inward contraction section is provided on the reducer, and a plurality of air outlets evenly distributed around the circumference are provided on the inward contraction section, and the outward expansion section is attached to the inner wall of the inward contraction section for sealing the air outlet, a fixing frame is fixed on the inner side of the reducer, a guide rod is provided below the fixing frame, and a reset spring is sleeved on the guide rod, and the two ends of the reset spring are respectively against the fixing frame and the lifting tube.

[0008] Preferably, the driving mechanism includes a driving motor, a bevel gear ring is provided on the outside of the rotating tube, a mounting bracket is fixed under the crossbeam, the driving motor is mounted on the mounting bracket, a bevel gear meshing with the bevel gear ring is installed on the output shaft of the driving motor, and a travel switch is installed on the inside of the connecting tube for controlling the opening and closing of the driving motor.

[0009] Preferably, the moving mechanism includes a rotating shaft rotatably arranged at the bottom of the vertical tube, a spiral blade is provided at one end of the rotating shaft located on the inner side of the vertical tube, a wheel frame is fixed to the lower end of the rotating shaft, a moving wheel is installed on the wheel frame, a torsion spring is sleeved on the rotating shaft, and both ends of the torsion spring are fixedly connected to the vertical tube and the wheel frame respectively.

[0010] Preferably, the moving mechanism also includes a sliding sleeve slidably arranged on the sliding rod, a vertical slot is provided at the side end of the sliding sleeve, and two fixed sleeves are fixed to the side end of the sliding sleeve, a lifting rod is slidably arranged in the fixed sleeve, a connecting plate is fixed at the bottom of the lifting rod, and the vertical tube is fixed below the connecting plate, a triangular groove is provided at the side end of the sliding rod, and the bottom side wall of the triangular groove gradually increases in height along the direction away from the rotating tube, the top side wall of the triangular groove is horizontally arranged, a vertical rod is fixed above the connecting plate, and a support rod is provided at the upper end of the vertical rod, and the end of the support rod is inserted into the triangular groove.

[0011] Preferably, the air supply mechanism includes a plurality of spring tubes, three equally spaced sealing rings are fixed on the outside of the reducer, and the sealing rings fit the inner wall of the rotating tube, and two sealed spaces are formed between the three sealing rings, namely the first sealed space and the second sealed space. A plurality of equally spaced bronchi are opened at a position on the rotating tube aligned with the first sealed space, and a plurality of equally spaced through holes are opened at a position on the reducer aligned with the second sealed space. The number of bronchi is the same as that of the sliding rod, and the bronchi are connected to the vertical tubes at the corresponding positions through spring tubes.

[0012] Preferably, the fill light mechanism includes an L-shaped frame, the support rod is in the shape of a channel steel, and a screw is rotatably arranged on the inner side of the support rod, a fill light motor for driving the screw to rotate is installed on the crossbeam, a horizontal fill light and a vertical fill light are arranged on the inner side of the L-shaped frame, and a sliding mechanism is arranged on the outer side of the L-shaped frame and is slidably connected to the support rod, and a protrusion is arranged on the outer side of the L-shaped frame and is located on the inner side of the support rod, and the protrusion is threadedly connected to the screw.

[0013] Preferably, a breathable plate is provided in the middle position of the machine, and a multi-layer fixing ring is provided under the breathable plate, and a bottom plate is fixed with a lower end of the fixing ring, and a plurality of vertically distributed capillary pores are provided on the breathable plate, and an exhaust pipe is connected to the middle of the bottom plate, and a sliding hole is provided on the fixing ring, and a sealing cover is provided on the inner side of the sliding hole, and a plurality of circumferentially evenly distributed outward buckles are provided on the sealing cover, and the outward buckles pass through the sliding hole, and the length of the outward buckles is greater than the thickness of the fixing ring, and a mounting sleeve is fixed on the inner wall of the fixing ring, and an iron stopper is slidingly provided on one end of the mounting sleeve close to the sealing cover, and the end of the iron stopper is against the side of the sealing cover away from the outward buckle, and an electromagnet is installed at the other end of the mounting sleeve, and a compression spring is provided between the electromagnet and the iron stop, and a plurality of magnetic induction switches for controlling the power on and off of the electromagnet are installed on the inner upper end of the fixing ring, and the magnetic induction switches are connected in parallel, and a magnetic block is provided inside the moving wheel.

[0014] Preferably, a plurality of air holes are provided on the bottom plate, and the air holes are located on the inner side of the fixing ring at the corresponding position, and a bellows with a sealed upper end is connected above the air holes, and a round rod is fixed to the upper end of the bellows, and a triangular block is fixed to the side of the sealing cover away from the outward-flipping buckle, and the inclined surface of the triangular block is against the round rod, and as the round rod descends, the sealing cover can be pushed toward the fixing ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Air is supplied to the vertical pipe through the air supply mechanism, and the fabric is blown through the flat air nozzle. The blowing direction is from the center of the fabric to the edge, and the rotating tube rotates continuously so that the blowing effect acts on the fabric for a circle. At the same time, the vertical pipe can diffuse toward the edge, so that the blowing effect gradually expands from the center to the edge, so that the fabric is gradually blown flat from the center to the edge, so that the fabric fits the machine. Different air intake rates can be selected according to the degree of wrinkles of the fabric to ensure that the fabric can be smoothed in one go, saving time. Moreover, no tension is applied to the fabric, and elastic fabrics can be smoothed, so it has a wide range of applications.

[0017] At the same time, a negative pressure area composed of multiple fixed rings is provided at the bottom of the cloth, which is divided into inner and outer parts, and an induction channel is provided between the negative pressure areas. As the moving wheel gradually expands outward, the negative pressure area will also gradually expand from the inside, and the smoothed cloth will be adsorbed on the breathable plate to prevent the cloth from wrinkling again after being smoothed, thereby further improving the smoothing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall axial side structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure below the crossbeam in the present invention;

[0020] Figure 3 This is a schematic structural diagram of the inner side of the rotating tube in the present invention;

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 Schematic diagram of the structure of the mobile mechanism of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the slide bar in the present invention;

[0024] Figure 7 Schematic diagram of the structure inside the vertical pipe of the present invention;

[0025] Figure 8Schematic diagram of the structure of the air-permeable plate and the structure below it in the present invention;

[0026] Figure 9 Schematic diagram of the local structure of the air permeable plate in the present invention;

[0027] Figure 10 It is a structural schematic diagram of the fixing ring and its installation structure in the present invention;

[0028] Figure 11 It is a structural diagram of the fill light mechanism in the present invention.

[0029] In the figure: 1. Machine platform; 2. Three-dimensional moving structure; 3. Crossbeam; 4. Support rod; 5. Hydraulic cylinder; 6. Fixed cover; 7. Inlet pipe; 8. Connecting pipe; 9. Rotating pipe; 10. Reducer; 11. Sliding rod; 12. Vertical pipe; 13. Flat air nozzle; 14. Lifting pipe; 15. Pressing plate; 16. Fixed frame; 17. Guide rod; 18. Return spring; 19. Air outlet; 20. Outward expansion section; 21. Bevel gear ring; 22. Mounting frame; 23. Driving motor; 24. Rotating shaft; 25. Wheel frame; 26. Torsion spring; 27. Helical blade; 28. Moving wheel; 29. ​​Sliding sleeve; 30. Vertical slot; 31. Lifting Rod; 32. Vertical rod; 33. Triangular groove; 34. Sealing ring; 35. Through hole; 36. Bronchus; 37. Spring tube; 38. Screw; 39. Fill light motor; 40. L-shaped frame; 41. Horizontal fill light; 42. Vertical fill light; 43. Breathing plate; 44. Capillary pores; 45. Fixing ring; 46. Bottom plate; 47. Sealing cover; 48. Outward buckle; 49. Mounting sleeve; 50. Iron block; 51. Electromagnet; 52. Magnetic induction switch; 53. Exhaust pipe; 54. Breathing hole; 55. Bellows; 56. Round rod; 57. Triangular block; 58. Extension rod; 59. Camera; 60. Travel switch. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1-11As shown, the present invention provides a technical solution: an umbrella fabric cutting device based on machine vision, comprising a machine platform 1 and a laser cutting head, wherein the machine platform 1 is provided with a three-dimensional moving structure 2 for driving the laser cutting head to cut fabric, a crossbeam 3 is provided above the machine platform 1, two support rods 4 are provided at both ends of the crossbeam 3, and the support rods 4 are slidably provided on both sides of the machine platform 1, and a hydraulic cylinder 5 for lifting the crossbeam 3 and a fill light mechanism for shooting fill light are provided on the outside of the support rods 4, a fixed cover 6 is fixed below the crossbeam 3, the side end of the fixed cover 6 is connected to an air intake pipe 7, a plurality of extension rods 58 are provided on the outside of the fixed cover 6, a camera 59 is installed on the extension rod 58, and a fixed cover 6 is provided below the fixed cover 6. A connecting tube 8 is provided, and a rotating tube 9 is rotatably connected to the bottom of the connecting tube 8, and a reducing tube 10 is provided on the inner side of the rotating tube 9. A central pressure head is provided at the bottom of the reducing tube 10 for pressing the center of the cloth. A plurality of sliding rods 11 evenly distributed around the circumference are fixed to the outside of the rotating tube 9 (six sliding rods 11 are used in this embodiment), and a vertical tube 12 is slidably provided below the sliding rod 11. The bottom of the vertical tube 12 is sealed and a flat air nozzle 13 inclined downward is connected to the side away from the rotating tube 9. A moving mechanism for driving the vertical tube 12 to move horizontally is provided between the sliding rod 11 and the vertical tube 12, an air supply mechanism is provided between the rotating tube 9 and the vertical tube 12, and a driving mechanism for driving the rotating tube 9 to rotate is provided on the crossbeam 3.

[0032] With the above arrangement, the three-dimensional moving structure 2 drives the laser cutting head to move and cut the cloth laid on the machine table 1. The three-dimensional moving structure 2 is a prior art and will not be described in detail here.

[0033] After laying the fabric, the fabric is illuminated from the side by the fill light mechanism, and the multiple cameras 59 on the beam 3 take pictures. The degree of wrinkles of the fabric is determined based on the pictures taken. The corresponding air intake rate is selected through the air supply device according to the degree of wrinkles to supply gas to the air intake pipe 7. Then the hydraulic cylinder 5 controls the beam 3 to slowly descend until the central pressure head touches the center of the fabric. Then the air supply mechanism supplies air to the vertical pipe 12 and blows the fabric through the flat air nozzle 13. The blowing direction is from the center of the fabric to the edge, and at this time the driving mechanism The rotating tube 9 is driven to rotate, so that the blowing effect acts on the cloth for a circle. At the same time, the moving mechanism will drive the vertical tube 12 to diffuse toward the edge, so that the blowing effect gradually expands from the center to the edge, so that the cloth is gradually blown flat toward the edge starting from the center of the cloth, so that the cloth fits the machine 1. After that, the crossbeam 3 is lifted and cutting can be carried out. Different air intake rates can be selected according to the degree of wrinkles of the cloth to ensure that the cloth can be smoothed at one time, saving time, and no tension is applied to the cloth. It can smooth elastic cloth and has a wide range of applications.

[0034] like Figure 3 and Figure 4As shown, the central pressure head includes a lifting tube 14 at the bottom of the sliding reducer 10, a pressure plate 15 is rotatably provided at the bottom of the lifting tube 14, and an outward expansion section 20 is provided at the upper end of the lifting tube 14, and a retracted section is provided on the reducer 10, and a plurality of air outlets 19 uniformly distributed around the circumference are opened on the retracted section, and the outward expansion section 20 is fitted on the inner wall of the retracted section for sealing the air outlet 19, a fixing frame 16 is fixed on the inner side of the reducer 10, a guide rod 17 is provided below the fixing frame 16, and a return spring 18 is sleeved on the guide rod 17, and the two ends of the return spring 18 are respectively against the fixing frame 16 and the lifting tube 14.

[0035] With the above arrangement, as the crossbeam 3 descends, the pressing plate 15 will press on the center of the cloth, and because the pressing plate 15 is a rotating connection, when the rotating tube 9 rotates, the pressing plate 15 will not drive the cloth to rotate. After the pressing plate 15 is pressed on the center of the cloth, the crossbeam 3 continues to descend. At this time, the lifting tube 14 does not move, and the reducing tube 10 moves downward and compresses the reset spring 18. At this time, the outward expansion section 20 is separated from the inward contraction section, and the air outlet 19 is connected. The gas inside the rotating tube 9 can be discharged outward through the air outlet 19, blowing the position near the center of the cloth (the position that the flat air nozzle 13 cannot reach), further improving the flattening effect of the cloth.

[0036] refer to Figure 2 As shown, the driving mechanism includes a driving motor 23, a bevel gear ring 21 is provided on the outside of the rotating tube 9, a mounting bracket 22 is fixed under the crossbeam 3, the driving motor 23 is mounted on the mounting bracket 22, and a bevel gear meshing with the bevel gear ring 21 is installed on the output shaft of the driving motor 23. A limit switch 60 is installed on the inside of the connecting tube 8 for controlling the opening and closing of the driving motor 23.

[0037] With the above arrangement, as the crossbeam 3 descends, the reducer 10 is gradually squeezed upward by the return spring 18. When the reducer 10 presses against the travel switch 60, the hydraulic cylinder 5 is closed, the drive motor 23 is started, and the crossbeam 3 stops descending to prevent excessive descent from damaging the equipment and fabric. At this time, the drive motor 23 can drive the rotating tube 9 to rotate through the bevel gear and bevel gear ring 21.

[0038] refer to Figure 5-Figure 7As shown, the moving mechanism includes a rotating shaft 24 rotatably arranged at the bottom of the vertical tube 12, and a spiral blade 27 is provided at one end of the rotating shaft 24 located inside the vertical tube 12. A wheel frame 25 is fixed to the lower end of the rotating shaft 24, and a moving wheel 28 is installed on the wheel frame 25. A torsion spring 26 is sleeved on the rotating shaft 24, and the two ends of the torsion spring 26 are fixedly connected to the vertical tube 12 and the wheel frame 25 respectively. The moving mechanism also includes a sliding sleeve 29 slidably arranged on the slide rod 11, and a vertical slot 30 is opened at the side end of the sliding sleeve 29, and the sliding sleeve 29 is provided with a vertical slot 30. Two fixed sleeves are fixed to the side ends of the sleeve 29, and a lifting rod 31 is slidingly set in the fixed sleeve. A connecting plate is fixed to the bottom of the lifting rod 31, and the vertical tube 12 is fixed below the connecting plate. A triangular groove 33 is opened at the side end of the sliding rod 11, and the bottom side wall of the triangular groove 33 gradually increases in height along the direction away from the rotating tube 9. The top side wall of the triangular groove 33 is set horizontally. A vertical rod 32 is fixed above the connecting plate, and a support rod is set at the upper end of the vertical rod 32, and the end of the support rod is inserted into the triangular groove 33.

[0039] With the above arrangement, in the initial state, the moving wheel 28 has a certain initial angle with the perpendicular line of the slide bar 11, which is recorded as the rotation deviation angle (hereinafter referred to as the rotation deviation angle). After the crossbeam 3 drops, the moving wheel 28 contacts the cloth and rests on the machine table 1. At this time, the torsion spring 26 can play a buffering role and make the moving wheel 28 fit tightly against the machine table 1. As the air supply mechanism supplies air to the vertical pipe 12, the gas drives the rotating shaft 24 to rotate through the spiral blades 27, so that the rotation deviation angle of the moving wheel 28 becomes smaller, and the faster the wind speed, the smaller the rotation deviation angle. At the same time, the driving mechanism drives the rotating tube 9 to rotate, and the slide bar 11 rotates along the center of the cloth. Since the moving wheel 28 has a certain rotation deviation angle, the moving wheel 28 gradually moves away from the center of the cloth while rotating along the center of the cloth, and drives the vertical pipe 12 to move along the slide bar 11, thereby realizing the spiral expansion of the smoothing action and realizing the smoothing of the cloth.

[0040] After the smoothing is completed, the crossbeam 3 moves up, and as the moving wheel 28 moves away from the machine 1, under the action of gravity, the lifting rod 31 tends to slide down along the sliding sleeve 29, and as the lifting rod 31 moves down, the support rod is located at one end in the triangular groove 33, and moves from high to low along the bottom side wall of the triangular groove 33, thereby driving the sliding sleeve 29 and the vertical pipe 12 to move toward the end inside the sliding rod 11, achieving the reset effect.

[0041] refer to Figure 3 and Figure 5As shown, the air supply mechanism includes a number of spring tubes 37, three equally spaced sealing rings 34 are fixed to the outside of the reducer 10, and the sealing rings 34 are in contact with the inner wall of the rotating tube 9. Two sealed spaces are formed between the three sealing rings 34, namely the first sealed space and the second sealed space. A number of equally spaced bronchi 36 are provided on the rotating tube 9 at a position aligned with the first sealed space, and a number of equally spaced through holes 35 are provided on the reducer 10 at a position aligned with the second sealed space. The number of bronchi 36 is the same as that of the sliding rod 11, and the bronchi 36 are connected to the vertical tube 12 at the corresponding position through the spring tube 37.

[0042] With the above arrangement, in the initial state, the gas enters the fixed cover 6, the rotating tube 9 and the inner side of the reducer 10 through the air inlet pipe 7. At this time, the through hole 35 and the bronchial tube 36 are separated, and the gas cannot enter the vertical tube 12. As the reducer 10 moves upward, when the through hole 35 and the bronchial tube 36 are aligned, the gas enters the bronchial tube 36 through the through hole 35, and then enters the spring tube 37 through the bronchial tube 36, and finally enters the vertical tube 12, thereby achieving the air supply effect. Moreover, the spring tube 37 can ensure uniform and continuous air supply during the movement of the vertical tube 12.

[0043] refer to Figure 11 As shown, the fill light mechanism includes an L-shaped frame 40, a channel-shaped support rod 4, and a screw 38 rotatably mounted on the inner side of the support rod 4. A fill light motor 39 is mounted on the crossbeam 3 to drive the screw 38. A horizontal fill light 41 and a vertical fill light 42 are mounted on the inner side of the L-shaped frame 40. A sliding mechanism is provided on the outer side of the L-shaped frame 40 and is slidably connected to the support rod 4. Furthermore, a protrusion is provided on the outer side of the L-shaped frame 40, located on the inner side of the support rod 4, and the protrusion is threadedly connected to the screw 38.

[0044] With the above arrangement, when fill light is needed, the fill light motor 39 drives the screw 38 to rotate, lowering the L-shaped frame 40, and when taking photos, photos are taken with the horizontal fill light 41 or the vertical fill light 42 turned on separately. Providing light from the side can further expand the light and shadow changes at the folds of the fabric, and fill light at different angles can improve the judgment effect when the direction of the wrinkles is single.

[0045] refer to Figures 8-10As shown, a breathable plate 43 is provided in the middle of the machine 1, and a multi-layer fixing ring 45 is provided below the breathable plate 43. A bottom plate 46 is fixed to the lower end of the fixing ring 45. A number of vertically distributed capillary pores 44 are provided on the breathable plate 43. An exhaust pipe 53 is connected to the middle of the bottom plate 46. A sliding hole is provided on the fixing ring 45, and a sealing cover 47 is provided on the inner side of the sliding hole. A number of circumferentially evenly distributed outward buckles 48 are provided on the sealing cover 47, and the outward buckles 48 pass through the sliding hole, and the length of the outward buckles 48 is greater than the thickness of the fixing ring 45. A mounting sleeve 49 is fixed on the inner wall of the fixing ring 45, and an iron stopper 50 is slidingly provided on one end of the mounting sleeve 49 close to the sealing cover 47, and the end of the iron stopper 50 is against the side of the sealing cover 47 away from the outward buckle 48. An electromagnet 51 is installed at the other end of the mounting sleeve 49, and a compression spring is provided between the electromagnet 51 and the iron stopper 50. A plurality of magnetic induction switches 52 for controlling the power on and off of the electromagnet 51 are installed at the inner upper end of the fixing ring 45, and the magnetic induction switches 52 are connected in parallel, and a magnetic block is provided inside the moving wheel 28. A plurality of air holes 54 are provided on the bottom plate 46, and the air holes 54 are located on the inner side of the fixing ring 45 at the corresponding position. A bellows 55 with an upper end seal is connected above the air holes 54, and a round rod 56 is fixed to the upper end of the bellows 55. A triangular block 57 is fixed to the side of the sealing cover 47 away from the outward buckle 48, and the inclined surface of the triangular block 57 is against the round rod 56. As the round rod 56 descends, the sealing cover 47 can be pushed toward the direction close to the fixing ring 45.

[0046] With the above arrangement, the negative pressure device is connected through the exhaust pipe 53 to ensure the negative pressure at the center of the fixed ring 45. Through the capillary pores 44, the cloth above is adsorbed, so that the cloth is more closely attached to the breathable plate 43. In addition, a plurality of fixed rings 45 form a multi-layer area from the inside to the outside. When the inner area is in a negative pressure state, the sealing cover 47 blocks the sliding hole, and the outer area is in a normal pressure state, which will not affect the smoothing of the cloth. As the vertical pipe 12 gradually diffuses outward, when the magnetic induction switch 52 senses the magnetic block built into the moving wheel 28 passing by, it will turn on the corresponding electromagnet 51. , the iron stopper 50 is attracted by the electromagnet 51, contacting the obstruction of the sealing cover 47, and when the inner area is under negative pressure, the pressure difference between the inner area and the outside will lift the bellows 55 upward, and the round rod 56 will rise synchronously, and will not block the movement of the sealing cover 47. At this time, the sealing cover 47 will move inward under the action of the internal and external pressure difference. At this time, the inner and outer areas of the corresponding fixing ring 45 will be connected through the sliding hole, and will gradually become a negative pressure state. As the moving wheel 28 gradually expands outward, the negative pressure area will also gradually expand from the inside, and the smoothed cloth will be adsorbed on the breathable plate 43.

[0047] When the cutting is completed, the negative pressure device is closed and the internal area of ​​the fixing ring 45 returns to normal pressure, making it convenient to remove the cloth. Moreover, as the pressure difference decreases, the bellows 55 contracts and descends under the action of the gravity of the round rod 56. At this time, the round rod 56 will squeeze the triangular block 57, so that the sealing cover 47 is reset.

[0048] In this embodiment, the magnetic induction switch 52 installed on each fixing ring 45 covers one sixth of the circumference of the corresponding fixing ring 45 , thereby ensuring that no matter how the moving wheels 28 move, at least one moving wheel 28 will pass above the magnetic induction switch 52 .

[0049] Method for judging the degree of wrinkles by photos in this embodiment:

[0050] The six photos taken by the three cameras 59 (two fill light modes) are analyzed separately, and the one with the largest wrinkle degree is taken as the standard: the photo is grayscaled to obtain a grayscale image, the grayscale value of each pixel in the grayscale image is subtracted from the minimum grayscale value, and then the standard range is calculated. The wrinkle degree is divided into six levels according to the size of the tolerance, as shown in Table 1 below:

[0051] Table 1: Wrinkle degree classification table (the first row is the wrinkle grade, the second row is the standard deviation range)

[0052]

[0053] After determining the wrinkle level of the fabric, select the appropriate air supply rate according to the material and thickness of the fabric to ensure the smoothing effect.

[0054] For level one wrinkles, there is no need to smooth them out and they can be cut directly. For level six wrinkles, manual intervention is required, otherwise it is difficult to smooth them out.

[0055] For fabrics of different materials and thicknesses, and at different wrinkle levels, different air supply standards are required. Furthermore, because the rotational deviation angle of the moving wheel 28 is affected by the elastic coefficient (denoted as k, in N / m, omitted below) of the torsion spring 26, different torsion springs 26 are required for different fabrics. After multiple experiments, the optimal experimental data for the following fabrics are shown in Table 2:

[0056] Table 2: Experimental data table

[0057]

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is limited by the accompanying embodiments and their equivalents.

Claims

1. An umbrella fabric cutting device based on machine vision, comprising a machine platform (1) and a laser cutting head, characterized in that: The machine (1) is provided with a three-dimensional moving structure (2) for driving a laser cutting head to cut fabrics. A crossbeam (3) is provided above the machine (1). Two support rods (4) are provided at both ends of the crossbeam (3). The support rods (4) are slidably provided on both sides of the machine (1). A hydraulic cylinder (5) for lifting the crossbeam (3) and a fill-light mechanism for shooting fill-light are provided on the outside of the support rods (4). A fixed cover (6) is fixed below the crossbeam (3). An air intake pipe (7) is connected to the side end of the fixed cover (6). Several extension rods (58) are provided on the outside of the fixed cover (6). A camera (59) is installed on the extension rods (58). A connecting pipe (8) is provided below the fixed cover (6). The connecting pipe ( The rotating tube (8) is rotatably connected to the bottom thereof, and a reducing tube (10) is provided on the inner side of the rotating tube (9), and a central pressure head is provided on the bottom of the reducing tube (10) for pressing the center of the cloth. A plurality of sliding rods (11) evenly distributed around the circumference are fixed on the outer side of the rotating tube (9), and a vertical tube (12) is slidably provided below the sliding rod (11). The bottom of the vertical tube (12) is sealed and connected to a flat air nozzle (13) inclined downward on the side away from the rotating tube (9). A moving mechanism for driving the vertical tube (12) to move horizontally is provided between the sliding rod (11) and the vertical tube (12), an air supply mechanism is provided between the rotating tube (9) and the vertical tube (12), and a driving mechanism for driving the rotating tube (9) to rotate is provided on the crossbeam (3).

2. The machine vision-based umbrella fabric cutting device according to claim 1, characterized in that: The central pressure head includes a lifting tube (14) at the bottom of the sliding reducer (10), a pressure plate (15) is rotatably provided at the bottom of the lifting tube (14), and an outward expansion section (20) is provided at the upper end of the lifting tube (14), a retracted section is provided on the reducing tube (10), a plurality of air outlets (19) evenly distributed around the circumference are opened on the retracted section, and the outward expansion section (20) is fitted on the inner wall of the retracted section for sealing the air outlets (19), a fixing frame (16) is fixed on the inner side of the reducing tube (10), a guide rod (17) is provided below the fixing frame (16), and a return spring (18) is sleeved on the guide rod (17), and the two ends of the return spring (18) are respectively against the fixing frame (16) and the lifting tube (14).

3. The machine vision-based umbrella fabric cutting device according to claim 1, characterized in that: The driving mechanism includes a driving motor (23), a bevel gear ring (21) is provided on the outer side of the rotating tube (9), a mounting frame (22) is fixed below the crossbeam (3), the driving motor (23) is mounted on the mounting frame (22), a bevel gear meshing with the bevel gear ring (21) is mounted on the output shaft of the driving motor (23), and a travel switch (60) is installed on the inner side of the connecting tube (8) for controlling the opening and closing of the driving motor (23).

4. The machine vision-based umbrella fabric cutting device according to claim 1, characterized in that: The moving mechanism comprises a rotating shaft (24) rotatably arranged at the bottom of the vertical tube (12), a spiral blade (27) being arranged at one end of the rotating shaft (24) located inside the vertical tube (12), a wheel frame (25) being fixed to the lower end of the rotating shaft (24), a moving wheel (28) being mounted on the wheel frame (25), a torsion spring (26) being sleeved on the rotating shaft (24), and two ends of the torsion spring (26) being fixedly connected to the vertical tube (12) and the wheel frame (25), respectively.

5. The machine vision-based umbrella fabric cutting device according to claim 4, characterized in that: The moving mechanism further comprises a sliding sleeve (29) slidably arranged on the sliding rod (11), a vertical notch (30) is provided at the side end of the sliding sleeve (29), and two fixed sleeves are fixed at the side end of the sliding sleeve (29), a lifting rod (31) is slidably arranged in the fixed sleeve, a connecting plate is fixed at the bottom of the lifting rod (31), and the vertical tube (12) is fixed below the connecting plate, a triangular groove (33) is provided at the side end of the sliding rod (11), and the bottom side wall of the triangular groove (33) gradually increases in height in a direction away from the rotating tube (9), and the top side wall of the triangular groove (33) is arranged horizontally, a vertical rod (32) is fixed above the connecting plate, and a support rod is provided at the upper end of the vertical rod (32), and the end of the support rod is inserted into the triangular groove (33).

6. The umbrella fabric cutting device based on machine vision according to claim 1, characterized in that: The air supply mechanism includes a plurality of spring tubes (37), three sealing rings (34) distributed at equal intervals are fixed on the outer side of the reducer (10), and the sealing rings (34) are in contact with the inner wall of the rotating tube (9), and two sealed spaces are formed between the three sealing rings (34), namely a first sealed space and a second sealed space. A plurality of bronchial tubes (36) distributed at equal intervals are opened at a position aligned with the first sealed space on the rotating tube (9), and a plurality of through holes (35) distributed at equal intervals are opened at a position aligned with the second sealed space on the reducer (10). The number of bronchial tubes (36) is the same as that of the sliding rod (11), and the bronchial tubes (36) are connected to the vertical tubes (12) at corresponding positions through the spring tubes (37).

7. The umbrella fabric cutting device based on machine vision according to claim 1, characterized in that: The fill light mechanism comprises an L-shaped frame (40), a support rod (4) in the shape of a channel steel, a screw rod (38) being rotatably provided on the inner side of the support rod (4), a fill light motor (39) being installed on the crossbeam (3) for driving the screw rod (38) to rotate, a horizontal fill light (41) and a vertical fill light (42) being provided on the inner side of the L-shaped frame (40), a sliding mechanism being provided on the outer side of the L-shaped frame (40) and being slidably connected to the support rod (4), a convex block being located on the inner side of the support rod (4) and being threadedly connected to the screw rod (38).

8. The machine vision-based umbrella fabric cutting device according to claim 4, characterized in that: A breathable plate (43) is provided in the middle of the machine (1), and a multi-layer fixed ring (45) is provided below the breathable plate (43). A bottom plate (46) is fixed to the lower end of the fixed ring (45). A plurality of vertically distributed capillary pores (44) are provided on the breathable plate (43). An exhaust pipe (53) is connected to the middle of the bottom plate (46). A sliding hole is provided on the fixed ring (45), and a sealing cover (47) is provided inside the sliding hole. A plurality of circumferentially evenly distributed outward buckles (48) are provided on the sealing cover (47), and the outward buckles (48) pass through the sliding hole, and the length of the outward buckles (48) is greater than the thickness of the fixed ring (45). A mounting sleeve (49) is fixed on the inner wall of the fixing ring (45), and an iron stopper (50) is slidably provided on one end of the mounting sleeve (49) close to the sealing cover (47), and the end of the iron stopper (50) is against the side of the sealing cover (47) away from the outward buckle (48), and an electromagnet (51) is installed on the other end of the mounting sleeve (49), and a compression spring is provided between the electromagnet (51) and the iron stopper (50), and a plurality of magnetic induction switches (52) for controlling the power on and off of the electromagnet (51) are installed on the inner upper end of the fixing ring (45), and the magnetic induction switches (52) are connected in parallel, and a magnetic block is provided inside the moving wheel (28).

9. The machine vision-based umbrella fabric cutting device according to claim 8, characterized in that: The bottom plate (46) is provided with a plurality of air holes (54), and the air holes (54) are located on the inner side of the fixing ring (45) at the corresponding position. A bellows (55) with a sealed upper end is connected above the air holes (54). A round rod (56) is fixed to the upper end of the bellows (55). A triangular block (57) is fixed to the side of the sealing cover (47) away from the outward buckle (48), and the inclined surface of the triangular block (57) is against the round rod (56). As the round rod (56) descends, the sealing cover (47) can be pushed toward the fixing ring (45).

Images