A laser cutting machine for shoe uppers

Abstract

The present application relates to the technical field of laser cutting bed of vamp, and discloses a shoe upper laser cutting bed without burr, which comprises a machine tool, a conveying belt for conveying fabric is arranged on the machine tool, a three-axis module is installed on the machine tool, a laser cutting machine is installed on the three-axis module, a suction assembly is arranged on the laser cutting machine, the suction assembly comprises a suction ring, and a flattening assembly is arranged at the bottom of the suction ring. The high temperature and smoke generated in the cutting area can be quickly sucked away by the annular negative pressure airflow formed by the suction ring, the cut fiber cooling and solidification is accelerated, and the molten fiber adhesion and pulling to generate burr are avoided. The periphery of the fabric cutting point can be uniformly and elastically compressed by the setting of the pressing ring, and the double effects of fabric flatness limiting and cut rapid cooling and dust removal during cutting are realized.

Description

Technical Field

[0001] This invention relates to the field of laser cutting bed technology for shoe uppers, and specifically to a laser cutting bed for shoe uppers without burrs. Background Technology

[0002] In the production and processing of textile and footwear uppers, chemical fiber and knitted fabrics need to be cut and prepared according to the upper pattern. The industry generally uses laser cutting machines to complete this process. Conventional laser cutting machines rely on a three-axis drive structure to move the laser cutting head. The fabric is laid flat on the cutting platform, and the outline is cut by melting the fabric fibers with high temperature laser, thus completing the cutting and processing of footwear upper pieces in batches.

[0003] Chinese patent CN202220012246.0 discloses a "laser cutting device for shoe upper manufacturing," comprising a support platform, a cutting board, a machine housing, a first electric telescopic rod, and a laser output device. The support platform has four load-bearing blocks at its lower corners and four first support blocks at its upper corners. A first limiting frame is mounted on the upper end of each first support block, and a fastening bolt is mounted on the upper end of each first limiting frame. Connecting frames are located inside both sides of the first limiting frame, and the cutting board is positioned in the middle of the connecting frames. The machine housing is mounted on one upper side of the support platform, and a control panel is located on one side of the machine housing. A power interface is located on the rear surface of the machine housing. A support plate is located on the other side of the machine housing, and the first electric telescopic rod is mounted on the front surface of the support plate. A connecting block is located at the telescopic end of the first electric telescopic rod, and a second support block is located below the connecting block. The device can process five pairs of shoe uppers simultaneously, improving the efficiency of shoe upper manufacturing.

[0004] However, the existing technology has the following problems:

[0005] During operation, existing laser cutting machines suffer from difficulty in timely removal of heat and molten fumes around the cutting point. The molten fibers at the cut surface cool slowly, causing adjacent cut surfaces to easily stick together. After the cut pieces are separated and pulled, surface burrs are formed. In addition, because the fabric itself is a flexible material, wrinkles, arches, and hollow areas are prone to occur in the cutting area, resulting in uneven heat distribution during laser cutting. Insufficient cutting of the underlying fibers in some areas can easily lead to the formation of underlying fuzz. Both of these defects together result in rough cuts on the shoe upper pieces, affecting product quality. Summary of the Invention

[0006] The purpose of this invention is to provide a laser cutting bed for shoe uppers without burrs in order to solve the above-mentioned problems. It aims to overcome the problems of existing technology, such as untimely heat dissipation and smoke exhaust, and the easy suspension of fabric, which cause burrs to easily form on the cut pieces. Details are described below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a laser cutting bed for shoe uppers without burrs, comprising a machine tool with a conveyor belt for conveying fabric, a three-axis module mounted on the machine tool, a laser cutting machine mounted on the three-axis module, a suction assembly on the laser cutting machine, the suction assembly including a suction ring located outside the cutting head of the laser cutting machine, and a ring of suction holes formed on the inner side of the suction ring; a flattening assembly is provided at the bottom of the suction ring for flattening the fabric around the cutting point.

[0009] Preferably, two pressure rollers are rotatably mounted on the machine tool, and the working area of ​​the laser cutting machine is located between the two pressure rollers.

[0010] Preferably, the suction assembly further includes a fixing base, which is mounted on a laser cutting machine. Two optical rods are connected to the fixing base, and the bottom ends of the two optical rods slide through into the suction ring. Two springs are provided between the top of the suction ring and the fixing base, and the two springs are respectively sleeved on the outside of the two optical rods. An air pipe for connecting to an external suction pipeline is installed on the suction ring.

[0011] Preferably, the flattening component uses a pressure ring, which is connected to the bottom of the suction ring. The bottom of the pressure ring has rounded corners, and the pressure ring is made of mirror-polished stainless steel.

[0012] Preferably, the flattening assembly includes a ring seat and multiple ball sleeves. The ring seat is connected to the bottom of the suction ring, and the ball sleeves are installed at the bottom of the ring seat. A ball head is omnidirectionally connected inside the ball sleeve. The multiple ball sleeves are arranged in a circumferential array. Each ball sleeve is provided with a telescopic section that can extend and retract vertically, and a spring is sleeved on the outside of the telescopic section.

[0013] Preferably, the top of the ball sleeve is provided with a slider, and the bottom of the ring seat is provided with a plurality of straight grooves in a radial pattern. The plurality of sliders are slidably connected in the plurality of straight grooves respectively. The ring seat is provided with an adjustment mechanism for adjusting the radial position of each ball sleeve. The adjustment mechanism can drive the plurality of ball sleeves to move toward or away from the center of the ring seat radially in a synchronized manner, so as to uniformly adjust the annular support range formed by the plurality of ball heads.

[0014] Preferably, the adjusting mechanism includes a grooved ring and a lead screw. The grooved ring is rotatably mounted inside a ring seat, and the lead screw is threaded onto the ring seat. A spiral spring is provided between the inner side of the grooved ring and the inner wall of the grooved ring. The grooved ring has a notch with an inclined surface. The end of the lead screw abuts against the inclined surface of the notch. The lead screw applies pressure to the inclined surface to drive the grooved ring to rotate. A sliding pair is provided between the slider and the grooved ring, so that when the grooved ring rotates, it drives multiple sliders to move synchronously closer to or away from the center of the ring seat.

[0015] Preferably, the sliding pair includes a sliding shaft connected to the slider and a guide groove formed on the grooved ring. The sliding shaft is slidably connected to the guide groove, and the multiple guide grooves on the grooved ring are arranged in a circumferential array.

[0016] Preferably, the suction ring is provided with an anti-clogging mechanism, which includes a movable ring and multiple sets of scrapers connected above it. The movable ring is located inside the suction ring and is connected to the bottom ends of the two light rods. The suction hole is a rectangular hole, and the multiple sets of scrapers contact the inner edges of the multiple suction holes respectively.

[0017] Preferably, the anti-blocking mechanism further includes an inner liner ring, which is rotatably installed inside the suction ring. A gear ring is connected to the inner liner ring, and an impeller is rotatably installed inside the air pipe. The impeller has a shaft, and a gear is connected to the bottom end of the shaft. The gear meshes with the gear ring. When the inner liner ring rotates, its various positions will sequentially circulate under the air pipe.

[0018] The beneficial effects are:

[0019] 1. This laser cutting bed for shoe uppers, with its burr-free design, utilizes a suction component to rapidly remove the high temperatures and fumes generated in the cutting area through a ring-shaped negative pressure airflow. This removes residual heat from the cutting process, accelerates the cooling and solidification of the cut fibers, and prevents the molten fibers from sticking together and pulling, thus avoiding burrs. The pressure ring ensures that the fabric cutting points are elastically and evenly compressed, eliminating wrinkles, arching, and air pockets. This guarantees that the laser penetrates the fabric vertically and completely, preventing insufficient melting of the underlying fibers and the formation of hidden fuzz. These two features work together to achieve the dual effects of flat and controlled fabric during cutting, as well as rapid cooling and dust removal at the cut edge. This solves the problem of various burrs easily generated when cutting shoe upper fabrics using traditional laser cutting beds.

[0020] 2. This laser cutting machine for shoe uppers, which eliminates rough edges, uses multiple ball heads as flattening components. As the ring seat moves, these ball heads conform to the three-dimensional texture of the shoe upper and rotate, preventing the fabric from being dragged. The single-point elastic cushioning structure of the ball heads can adapt to various uneven fabrics. While maintaining effective contact with the top surface of the fabric, it also effectively presses the bottom surface of the fabric firmly onto the conveyor belt, thus eliminating fabric gaps and suspensions during cutting. Furthermore, operators can adjust the ring support range flexibly by rotating the lead screw to achieve synchronous radial displacement of all ball heads according to fabric thickness and actual needs, adapting to the different flattening requirements of thick and thin fabrics. The equipment has greater versatility and provides stable cutting quality.

[0021] 3. This laser cutting bed for shoe uppers without burrs features an anti-clogging mechanism. The scraper blades can reciprocate to scrape the inner wall of the suction hole using the floating stroke of the suction ring, cleaning the attached clumps of impurities in real time and preventing the suction hole from clogging. At the same time, the impeller driven by airflow rotates slowly in conjunction with the inner liner ring, circulating and transferring the residual impurities that fall inside the suction ring, and then suctioning them out through the air pipe, thus avoiding the problem of dust accumulation and clogging of the suction ring after long-term operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the machine tool structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the pressure roller structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the laser cutting machine structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the flattening component in the first embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the flattening component in the second embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the grooved ring structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the lead screw structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the ball sleeve structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the active ring structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the inner liner structure of the present invention.

[0033] The annotations in the attached figures are explained as follows:

[0034] 1. Machine tool; 2. Three-axis module; 3. Laser cutting machine; 4. Pressure roller;

[0035] 5. Suction assembly; 51. Fixing base; 52. Smooth rod; 53. Suction ring; 54. Air tube; 55. Movable ring; 56. Scraper; 57. Inner liner ring; 58. Gear ring; 59. Impeller; 510. Gear;

[0036] 6. Pressing ring;

[0037] 71. Ring seat; 72. Ball sleeve; 73. Ball head; 74. Slider; 75. Sliding shaft; 76. Grooved ring; 77. Lead screw. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0039] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0041] To address the issue of burrs appearing during laser cutting of fabrics, this application proposes the following first embodiment:

[0042] Please see Figure 1 - Figure 5A laser cutting bed for shoe uppers without burrs includes a machine tool 1, which is equipped with a conveyor belt for conveying fabric. The conveyor belt is connected to an upstream fabric supply device, which unrolls the fabric and conveys it to the working surface of the machine tool 1. The conveyor belt is a metal conveyor belt with a multi-row serrated structure. The serrated structure increases the friction between the conveyor belt and the fabric, preventing slippage and deviation during fabric conveying. It also provides stable support for the bottom of the fabric and is less affected by laser cutting, allowing for long-term use. A three-axis module 2 is installed on the machine tool 1, and a laser cutting machine 3 is installed on the three-axis module 2. Two pressure rollers 4 are rotatably mounted on the machine tool 1 for laser cutting. The working area of ​​machine 3 is located between two pressure rollers 4. The pressure rollers 4 are made of flexible material and work with the conveyor belt to temporarily fix the fabric section to be cut. The three-axis module 2 drives the laser cutting machine 3 to complete the X, Y, and Z three-axis omnidirectional moving cut, which can adapt to any contour shoe upper piece. The two flexible material pressure rollers 4 are respectively arranged on the front and back sides of the cutting area. The fabric passes through the bottom of the two pressure rollers 4. The surface of the flexible material pressure rollers 4 can press the fabric surface evenly. In conjunction with the conveyor belt, the fabric around the cutting point is clamped and limited. During the cutting process, the fabric will not move back and forth, avoiding the misalignment of the cut surface and the generation of rough edges due to fabric displacement.

[0043] Furthermore, the laser cutting machine 3 is equipped with a suction assembly 5, which includes a fixed base 51 and a suction ring 53. The fixed base 51 is mounted on the laser cutting machine 3, and two optical rods 52 are connected to the fixed base 51. The bottom ends of the two optical rods 52 slide through into the suction ring 53, so that the suction ring 53 is vertically slidably connected to the optical rods 52. The suction ring 53 is located outside the cutting head of the laser cutting machine 3. A ring of suction holes is opened on the inner side of the suction ring 53. Two springs are provided between the top of the suction ring 53 and the fixed base 51, and the two springs are respectively sleeved on the outside of the two optical rods 52, so that the suction ring 53 forms an elastic floating structure. The suction ring 53 is equipped with a device for connecting to the outside. The air pipe 54 of the suction pipeline and the fixing base 51 serve as the mounting base for the suction assembly 5. The entire suction assembly 5 is securely mounted above the bottom cutting head of the laser cutting machine 3. After the external negative pressure equipment pipeline is connected to the air pipe 54, air is continuously drawn out of the suction ring 53 through the air pipe 54, so that negative pressure is formed inside the suction ring 53. The suction ring 53 is arranged around the cutting head, and a ring of suction holes on the inner side forms an annular negative pressure airflow around the cutting point. During the cutting operation, the high-temperature melt, carbon ash and fumes generated by the laser melting fabric are promptly removed, and the heat accumulated in the cutting area is carried away. This accelerates the cooling and solidification of the molten fibers at the cut, prevents the molten fibers on both sides of the cut from sticking and pulling each other, and reduces the formation of burrs from the source.

[0044] In addition, a flattening component is provided at the bottom of the suction ring 53 to flatten the fabric around the cutting point. In this embodiment, the flattening component is a pressure ring 6, which is connected to the bottom of the suction ring 53. When the laser cutting machine 3 moves along the cutting trajectory, the height of the pressure ring 6 at the bottom of the suction ring 53 is preset so that when the cutting head is at the working height, the pressure ring 6 is in contact with the fabric surface and applies slight pressure, causing the spring sleeved on the outside of the optical rod 52 to slightly contract and maintain a downward elastic force. As the pressure ring 6 slides along the fabric surface, even if the pressure ring 6 encounters a protruding part of the fabric itself, or when pressing fabrics of different thicknesses, the pressure ring 6 can utilize the elastic floating characteristics of the suction ring 53 to follow the suction ring 53. The pressure ring 6 floats up and down, with rounded corners at the bottom. The pressure ring 6 is made of mirror-polished stainless steel. The smooth surface of the mirror-polished stainless steel pressure ring 6 results in low frictional resistance when in contact with the fabric, preventing snagging or scratching. The rounded corners at the bottom of the pressure ring 6 eliminate sharp edges, allowing it to smoothly conform to the uneven surface of the fabric. During the cutting process, the pressure ring 6 relies on the elastic pressure of the suction ring 53 to press the fabric around the cutting point, eliminating problems such as fabric wrinkles, arching, hollowness, and suspension. This ensures that the entire layer of fabric can be cut in a parallel posture, guaranteeing that the laser beam can vertically and completely melt through the entire layer of fabric. Furthermore, the fabric cutting surface is heated evenly, preventing the formation of fuzzy fibers at the bottom layer due to unevenness in the fabric.

[0045] In other words, this embodiment, through the setting of the suction component 5, enables the high temperature and fumes generated in the cutting area to be quickly extracted by the annular negative pressure airflow formed by the suction ring 53, which promptly removes the residual heat from the cutting, accelerates the cooling and solidification of the cut fibers, and avoids the molten fibers sticking together and pulling to produce burrs. Through the setting of the pressure ring 6, the periphery of the fabric cutting point can be elastically and evenly pressed, eliminating problems such as wrinkles, arching, and hollow suspension, ensuring that the laser vertically and completely melts through the fabric, and avoiding the formation of hidden fuzz due to insufficient melting and cutting of the bottom layer fibers. The two work together to achieve the dual effect of flat and limited fabric during the cutting process and rapid cooling and dust removal of the cut edge, solving the problem of various burrs easily generated when cutting shoe upper fabrics with traditional laser cutting beds.

[0046] Since the pressure ring 6 is a rigid ring structure, it is suitable for flattening smooth fabrics. However, some shoe uppers require the use of fabrics with three-dimensional textured surfaces during cutting. The surface of such fabrics is relatively rough, which makes the friction of the pressure ring 6, which is fixed in structure, greater when sliding along such fabrics. The pressure ring 6 is more likely to drag the fabric, causing the fabric to shift at the cutting point or to locally arch and bulge, affecting the cutting operation. Therefore, the following second embodiment is proposed as a replacement for the pressure ring 6 in the first embodiment:

[0047] Please see Figure 5 - Figure 8The flattening component includes a ring seat 71 and multiple ball sleeves 72. The ring seat 71 is connected to the bottom of the suction ring 53, and the ball sleeves 72 are installed at the bottom of the ring seat 71. Ball heads 73 are omnidirectionally connected inside the ball sleeves 72. The multiple ball sleeves 72 are distributed in a circumferential array. The ring seat 71 floats synchronously with the suction ring 53. The multiple sets of ball sleeves 72 evenly distributed in the circumferential array ensure that there are support and pressing points around the cutting point, and the force is even. The ball heads 73 at the bottom of the ball sleeves 72 can deflect at any angle. When the ring seat 71 moves, the multiple ball heads 73 can conform to the three-dimensional concave and convex texture of the shoe surface. The ball heads 73 rotate and roll due to friction, thereby reducing the friction between the two and preventing the ball heads 73 from dragging the fabric when sliding along the fabric.

[0048] In addition, the ball sleeve 72 is equipped with a telescopic section that can extend vertically, and a spring is sleeved on the outside of the telescopic section. The vertical telescopic section of the ball sleeve 72 and the externally sleeved spring form a single-point elastic buffer structure. When the ball head 73 contacts the raised texture of the shoe upper, the telescopic section compresses the spring upward, and the single point automatically retracts to avoid the protrusion. The remaining ball heads 73 continue to press the flat area. The multiple ball heads 73 utilize the characteristics of vertical extension and retraction to adapt to various uneven fabrics. While maintaining effective contact with the top surface of the fabric, they can also effectively press the bottom surface of the fabric onto the conveyor belt, thereby eliminating the air gaps and suspension of the fabric during the cutting operation.

[0049] In addition, the top of the ball sleeve 72 is provided with a slider 74, and the bottom of the ring seat 71 is provided with multiple straight grooves in a radial pattern. The multiple sliders 74 are slidably connected in the multiple straight grooves. The straight grooves constrain the sliders 74 to slide only radially inward or outward along the ring seat 71, without circumferential offset. The ring seat 71 is provided with an adjustment mechanism for adjusting the radial position of each ball sleeve 72. The adjustment mechanism can drive multiple ball sleeves 72 to move synchronously towards or away from the center of the ring seat 71 in the radial direction, so as to uniformly adjust the annular support range formed by the encirclement of multiple ball heads 73. The adjustment mechanism can synchronously drive all sliders 74 to make radial synchronous displacement along the straight grooves, so as to drive all ball sleeves 72 and ball heads 73 to move synchronously towards or away from the center of the ring seat 71, and uniformly change the annular support range formed by the encirclement of a circle of ball heads 73.

[0050] Specifically, the adjusting mechanism includes a grooved ring 76 and a lead screw 77. The grooved ring 76 is rotatably mounted inside the ring seat 71, and the lead screw 77 is threaded onto the ring seat 71. A spiral spring is provided between the inner side of the grooved ring 76 and its inner wall. The grooved ring 76 has a notch with an inclined surface. The end of the lead screw 77 abuts against the inclined surface of the notch. Applying pressure to the inclined surface with the lead screw 77 can drive the grooved ring 76 to rotate. A sliding pair is provided between the slider 74 and the grooved ring 76. The sliding pair includes a sliding plate connected to the slider 74. The shaft 75 and the guide groove formed on the grooved ring 76 are slidably connected. Multiple guide grooves on the grooved ring 76 are arranged in a circumferential array, causing multiple sliders 74 to synchronously move closer to or away from the center of the ring seat 71 when the grooved ring 76 rotates. A spiral spring mounted inside the grooved ring 76 continuously provides a reset torque to the grooved ring 76, ensuring that the inclined surface of the grooved ring 76 always abuts against the end of the lead screw 77. The end of the lead screw 77 is rounded to reduce friction with the inclined surface. The screw 77 is threaded into the ring seat 71, and a handwheel is provided on the screw 77 for easy rotation. When the operator rotates the screw 77 clockwise using the handwheel, the screw 77 feeds along the thread axis. The end of the screw 77 presses against the inclined surface of the notch, and the inclined surface is converted from axial thrust into circumferential torque, driving the grooved ring 76 to rotate counterclockwise. When the grooved ring 76 rotates counterclockwise, the guide groove wall pushes the sliding shaft 75 to slide synchronously inward along the radial straight groove of the ring seat 71, realizing the movement of all sliders 74, ball sleeves 72, and ball heads. 73 moves radially inward to reduce the support range; conversely, the screw 77 rotates in the opposite direction, moving away from the notch slope. The spiral spring uses its elasticity to drive the grooved ring 76 to rotate clockwise to reset, keeping the notch slope in contact with the end of the screw 77. When the grooved ring 76 rotates counterclockwise, the guide groove pushes the sliding shaft 75 to slide radially outward, realizing the synchronous radial outward displacement of all sliders 74, ball sleeves 72, and ball heads 73 to expand the support range. The adjustment operation is simple and the synchronization is high.

[0051] This embodiment can flatten fabrics of different thicknesses in a targeted manner. When cutting thick fabrics, due to the overall thickness of the fabric layer, when the ball head 73 presses down on the fabric surface, a slight indentation will be formed at the contact point. If the ball head 73 is too close to the cutting head, the indentation area may fall on the laser cutting path, thus affecting the cutting effect. However, the thick fabric layer is not prone to irregular bending or small-area local wrinkling. Therefore, by expanding all the ball heads 73 outwards simultaneously, the annular support range enclosed by the ball heads 73 is increased. The fabric inside the ring can be flattened by pressing the outer ring at multiple points, while keeping the ball heads 73 away from the cutting area to avoid interference from the pressing indentation on the cutting operation.

[0052] When cutting thin fabrics, due to their thinness, softness, and flexibility, if a large-scale ring support is used, the fabric within the support ring lacks sufficient restraint, which can easily lead to localized wrinkles or slight air pockets. For example, even a small, thin tissue can easily be folded and deformed. However, because thin fabrics are thin, the indentation produced by the ball head 73 is extremely shallow, and the interference with the laser cutting path is minimal. Therefore, all the ball heads 73 are simultaneously pulled inward to reduce the ring support range. By relying on multiple restraints near the cutting head, the soft fabric within the ring is firmly restrained, preventing localized deformation of the fabric and adapting to the flattening operation of thin fabrics.

[0053] Therefore, in this embodiment, multiple ball heads 73 are used as flattening components. When the ring seat 71 moves, the multiple ball heads 73 conform to the three-dimensional texture of the shoe upper and rotate and roll, avoiding dragging of the fabric. The single-point elastic buffer structure of the multiple ball heads 73 can adapt to various uneven fabrics. While maintaining effective contact with the top surface of the fabric, it can also effectively press the bottom surface of the fabric onto the conveyor belt, thereby eliminating fabric air bubbles and suspension during the cutting operation. In addition, the operator can rotate the lead screw 77 to realize the synchronous radial displacement of all ball heads 73 according to the fabric thickness and actual needs, flexibly adjusting the annular support range to adapt to the different flattening needs of thick and thin fabrics. The equipment has greater versatility and stable cutting and processing quality.

[0054] During the continuous suction of cutting fumes, molten carbon slag and fiber debris generated from laser cutting of shoe uppers will enter the suction ring 53 along with the fumes. Under long-term continuous suction operation, small impurities will adhere to and accumulate on the inner wall of the suction hole on the inner side of the suction ring 53. After the impurities accumulate and clump together, they can easily block the suction hole, thereby reducing the negative pressure suction capacity of the suction ring 53. Therefore, based on the first or second embodiment, the following third embodiment is proposed:

[0055] Please see Figure 9 , Figure 10The suction ring 53 is equipped with an anti-clogging mechanism, which includes a movable ring 55 and multiple sets of scrapers 56 connected above it. The movable ring 55 is located inside the suction ring 53 and connected to the bottom ends of the two smooth rods 52. The suction holes are rectangular holes, and the multiple sets of scrapers 56 contact the inner edges of the multiple suction holes respectively. The movable ring 55 is fixed to the smooth rods 52. Therefore, when the suction ring 53 floats up and down, the movable ring 55 remains stationary relative to the suction ring 53. Thus, the two will generate relative motion. That is to say, when the suction ring 53 floats, the smooth rods 52 move relative to the suction ring 53. The movable ring 55 moves vertically relative to the suction ring 53 and the suction hole, while each set of scrapers 56 corresponds to and fits the inner edge of the rectangular suction hole. Therefore, when the movable ring 55 and the suction ring 53 move relative to each other, the scrapers 56 fixed on the movable ring 55 also scrape back and forth relative to the inner edge of the suction hole they fit, scraping off the clumps of impurities attached to the inner wall of the suction hole. The scraped-off impurities are directly sucked into the suction ring 53 through the suction hole, avoiding blockage of the suction hole, continuously maintaining the unobstructed suction hole, and ensuring a stable output of the annular negative pressure airflow.

[0056] It is worth noting that the anti-clogging mechanism also includes an inner liner ring 57, which is rotatably installed inside the suction ring 53. A gear ring 58 is connected to the inner liner ring 57. An impeller 59 is rotatably installed inside the air pipe 54. The impeller 59 has a shaft, and a gear 510 is connected to the bottom end of the shaft. The gear 510 meshes with the gear ring 58. When the inner liner ring 57 rotates, its various positions will sequentially circulate below the air pipe 54. Impurities sucked into the suction ring 53 are partially discharged after entering the air pipe 54 with the airflow, while the other part falls onto the inner liner ring 57. When the negative pressure airflow inside the air pipe 54 flows through, it will impact the blades of the impeller 59. The kinetic energy of the airflow drives the impeller. 59 continues to rotate, and the impeller shaft of 59 synchronously drives the gear 510 at the bottom to rotate. The gear 510 meshes with the gear ring 58 fixed on the outside of the inner liner ring 57. The rotation of the gear 510 drives the gear ring 58 and the inner liner ring 57 to rotate slowly through meshing transmission. During the rotation of the inner liner ring 57, each area of ​​the ring body that receives impurities will rotate in a cycle to the position directly below the air pipe 54. The air pipe 54 continuously provides negative pressure suction to suck up and discharge all the impurities that have been transported from the inner liner ring 57 to the position below the air pipe 54. This realizes automatic circulation, transportation and cleaning of impurities, avoids the accumulation of impurities inside the suction ring 53, and continuously ensures the cooling and dust removal effect of the suction component 5.

[0057] In this embodiment, the anti-clogging mechanism allows the scraper 56 to reciprocate and scrape the inner wall of the suction hole using the floating stroke of the suction ring 53, cleaning the attached clumps of impurities in the suction hole in real time and preventing the suction hole from becoming blocked. At the same time, the impeller 59 is driven by airflow to rotate slowly in conjunction with the inner liner ring 57, circulating and transporting the residual impurities that fall inside the suction ring 53, and then sucking them out through the air pipe 54, thus avoiding the problem of dust accumulation and hole blockage after long-term operation of the suction ring 53.

[0058] It is worth mentioning that the laser cutting machine 3 in this application and its equipped suction component 5 and flattening component can be set in multiple ways to facilitate the simultaneous cutting of multiple shoe uppers.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A laser cutting bed for shoe uppers without burrs, comprising a machine tool (1) having a conveyor belt for conveying fabric, wherein a three-axis module (2) is mounted on the machine tool (1), and a laser cutting machine (3) is mounted on the three-axis module (2), characterized in that: The laser cutting machine (3) is provided with a suction assembly (5), which includes a suction ring (53). The suction ring (53) is located outside the cutting head of the laser cutting machine (3), and a ring of suction holes is opened on the inner side of the suction ring (53). The bottom of the suction ring (53) is provided with a flattening component for flattening the fabric around the cutting point.

2. The laser cutting bed for seamless shoe uppers according to claim 1, characterized in that: Two pressure rollers (4) are rotatably mounted on the machine tool (1), and the working area of ​​the laser cutting machine (3) is located between the two pressure rollers (4).

3. The laser cutting bed for seamless shoe uppers according to claim 1, characterized in that: The suction assembly (5) also includes a fixed base (51), which is mounted on the laser cutting machine (3). Two light rods (52) are connected to the fixed base (51). The bottom ends of the two light rods (52) slide through into the suction ring (53). Two springs are provided between the top of the suction ring (53) and the fixed base (51), and the two springs are respectively sleeved on the outside of the two light rods (52). An air pipe (54) for connecting to an external suction pipeline is installed on the suction ring (53).

4. The laser cutting bed for shoe uppers without rough edges according to claim 3, characterized in that: The flattening component uses a pressure ring (6), which is connected to the bottom of the suction ring (53). The bottom of the pressure ring (6) has rounded corners, and the pressure ring (6) is made of mirror-polished stainless steel.

5. The laser cutting bed for shoe uppers without rough edges according to claim 3, characterized in that: The flattening assembly includes a ring seat (71) and multiple ball sleeves (72). The ring seat (71) is connected to the bottom of the suction ring (53). The ball sleeves (72) are installed at the bottom of the ring seat (71). A ball head (73) is omnidirectionally connected inside the ball sleeve (72). The multiple ball sleeves (72) are arranged in a circumferential array. The ball sleeves (72) are provided with a telescopic section that can extend and retract vertically, and a spring is sleeved on the outside of the telescopic section.

6. The laser cutting bed for seamless shoe uppers according to claim 5, characterized in that: The ball sleeve (72) is provided with a slider (74) at the top, and the bottom of the ring seat (71) is provided with a plurality of straight grooves in a radial pattern. The sliders (74) are slidably connected in the plurality of straight grooves respectively. The ring seat (71) is provided with an adjustment mechanism for adjusting the radial position of each ball sleeve (72).

7. The laser cutting bed for seamless shoe uppers according to claim 6, characterized in that: The adjusting mechanism includes a grooved ring (76) and a lead screw (77). The grooved ring (76) is rotatably mounted inside the ring seat (71). The lead screw (77) is threaded onto the ring seat (71). A spiral spring is provided between the inner side of the grooved ring (76) and the inner wall of the grooved ring (76). The grooved ring (76) has a notch with an inclined surface. The end of the lead screw (77) abuts against the inclined surface of the notch. The lead screw (77) applies pressure to the inclined surface to drive the grooved ring (76) to rotate. A sliding pair is provided between the slider (74) and the grooved ring (76) so that when the grooved ring (76) rotates, it drives multiple sliders (74) to move synchronously closer to or away from the center of the ring seat (71).

8. The laser cutting bed for seamless shoe uppers according to claim 7, characterized in that: The sliding pair includes a sliding shaft (75) connected to the slider (74) and a guide groove formed on the grooved ring (76). The sliding shaft (75) is slidably connected to the guide groove, and the multiple guide grooves on the grooved ring (76) are arranged in a circumferential array.

9. The laser cutting bed for seamless shoe uppers according to claim 4 or 8, characterized in that: The suction ring (53) is provided with an anti-blocking mechanism, which includes a movable ring (55) and multiple sets of scrapers (56) connected above it. The movable ring (55) is located inside the suction ring (53) and is connected to the bottom end of two light rods (52). The multiple sets of scrapers (56) respectively contact the inner edge of multiple suction holes.

10. The laser cutting bed for shoe uppers without rough edges according to claim 9, characterized in that: The anti-clogging mechanism also includes an inner liner ring (57), which is rotatably installed inside the suction ring (53). A gear ring (58) is connected to the inner liner ring (57). An impeller (59) is rotatably installed inside the air pipe (54). The impeller (59) is provided with a wheel shaft, and a gear (510) is connected to the bottom end of the wheel shaft. The gear (510) meshes with the gear ring (58).

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