A laser cutting device and a cutting method suitable for ultra-fine fiber wiping cloth

Abstract

The present application relates to a kind of laser cutting device and its cutting method suitable for superfine fiber wiping cloth, the device includes: work station, laser cutting head, cloth positioning roller, rotary drive module, camera identification module and control host computer;Control host computer is used to control coordination laser cutting head, cloth positioning roller and rotary drive module and camera identification module, through the cooperation of camera identification module and control host computer, wrinkle stripe in horizontal two-dimensional coordinate system is identified and wrinkle direction is determined, and through the cloth positioning roller placed at special angle on work station, two pulling forces are formed in flow direction and the direction perpendicular to flow direction, through the correspondence of two pulling forces and wrinkle direction, the wrinkle stripe of cloth can be pulled and unfolded in turn, the whole process is realized fully automatic, real-time adjustment is carried out to cloth, avoid manual operation, and eliminate the risk existed in transmission production mode.

Description

Technical Field

[0001] This invention relates to the field of laser technology, and in particular to a laser cutting device and method suitable for microfiber wiping cloths. Background Technology

[0002] In the later stages of cleanroom wipe manufacturing, they generally need to be cut into sheets of a certain size for easy distribution and packaging. Currently, there are three methods for cutting cleanroom wipes: cold cutting, laser cutting, and ultrasonic cutting. Cold cutting cleanroom wipes are mainly cut directly with electric shears. This cutting method easily produces lint at the edges, and post-cutting cleaning is not possible. A certain amount of lint will be generated at the edges during wiping, resulting in a lack of cleanliness. It is generally not recommended for high-end wiping. Ultrasonic cutting uses the vibration generated by the ultrasonic vibrator (converting electrical energy into mechanical energy), which is then transferred to the HORN (welding head) and squeezed by the cutter to cut the fabric. This edge sealing is the most perfect method for cutting cleanroom wipes, but due to its complex mechanical structure, it is very inconvenient for later maintenance. Laser cutting uses the instantaneous high temperature of the laser to melt and cut the fabric, resulting in better edge sealing without lint. After cutting, cleaning treatments such as mesh spraying and washing can be performed to achieve a high cleanroom standard. Currently, 75% of the market practices use this cutting method.

[0003] Currently, although laser cutting equipment is a common cutting method for cleanroom wipes, it still has drawbacks. Current laser cutting equipment relies on manual laying of the fabric, which is not only inefficient but also prone to wrinkling, causing misalignment between the preset cutting line and the actual cutting line. If workers need to adjust the fabric temporarily, it's not guaranteed to be correct on the first attempt, and there are also certain operational safety risks. Therefore, we have specifically proposed a laser cutting device and method suitable for microfiber wiping cloths to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a laser cutting device and method suitable for microfiber wiping cloths, which can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by the present invention to solve its technical problem is as follows: A laser cutting device suitable for microfiber wiping cloths is provided, the device comprising: The workstation has a conveyor on its upper surface for moving the fabric along a rectangular flow path, and the conveyor has a cutting area. A laser cutting head is movably positioned above the cutting area for cutting fabric; A fabric positioning roller, with one end located on the transfer position and the other end located outside the transfer position, is used to drive the fabric to move along the flow direction on the transfer position. One end of the fabric positioning roller faces the flow direction and the angle between the rotation axis and the flow direction is an acute angle. Multiple fabric positioning rollers are provided and are evenly divided into two groups and are axially symmetrically arranged on the left and right sides of the transfer position. A rotary drive module is used to drive the fabric positioning rollers, and the rotary drive module is provided in multiple ways corresponding to the multiple fabric positioning rollers; A camera recognition module is used to identify and acquire the horizontal projection area of ​​the wrinkled stripes of the fabric, and to establish a horizontal two-dimensional coordinate system in the cutting area and acquire the two-dimensional coordinates of the horizontal projection area and the stripe direction of the wrinkled stripes. The X-axis and Y-axis of the horizontal two-dimensional coordinate system divide the cutting area into four quadrant recognition areas, and each of the four quadrant recognition areas corresponds to at least one fabric positioning roller. The control host obtains the area value of the horizontal plane projection area in the four quadrant recognition areas according to the two-dimensional coordinates, and controls the rotation speed of at least one of the fabric positioning rollers located in the direction perpendicular to the wrinkling stripe direction according to the stripe direction.

[0006] The laser cutting device for microfiber wiping cloth described in this invention, wherein the rotary drive module is located at the end of the cloth positioning roller outside the transfer position.

[0007] The laser cutting device for microfiber wiping cloths of the present invention further includes a lifting module for driving the rotation drive module to rise and fall, a rotation module for driving the lifting module to rotate horizontally, an X-axis adjustment module for adjusting the distance between two adjacent rotation modules located on both sides of the transfer position in a direction perpendicular to the flow direction, and a Y-axis adjustment module for adjusting the distance between adjacent X-axis adjustment modules; the lifting module, the rotation module, the X-axis adjustment module, and the Y-axis adjustment module are all communicatively connected to the control host.

[0008] The laser cutting device for microfiber wiping cloths described in this invention includes a camera recognition module movably positioned above the transfer position via a first robotic arm, and a laser cutting head movably positioned above the transfer position via a second robotic arm.

[0009] The laser cutting device for microfiber wiping cloths described in this invention has a square cutting area, and the origin of the horizontal two-dimensional coordinate system coincides with the center of the cutting area.

[0010] A cutting method for a laser cutting device suitable for microfiber wiping cloth is also provided, the method comprising the following steps: A cutting area is divided at the transfer position, and a horizontal two-dimensional coordinate system is established on the cutting area. The center of the horizontal two-dimensional coordinate system is the center of the cutting area. The X-axis and Y-axis of the horizontal two-dimensional coordinate system divide the cutting area into four quadrant recognition areas. Each of the four quadrant recognition areas corresponds to at least one fabric positioning roller. The fabric is laid flat on the cutting area along the flow direction, and the edges of the fabric are pressed against the transfer position by multiple fabric positioning rollers. The camera recognition module acquires image information of the fabric on the cutting area, and obtains the two-dimensional coordinates of the horizontal projection area and the stripe direction based on the image information. After determining the stripe direction, the rotational speed of at least one fabric positioning roller located in a direction perpendicular to the stripe direction is increased by the control host to unfold the folds of the fabric. After the pleats are fully unfolded, the fabric is cut within the cutting area using the laser cutting head.

[0011] The beneficial effects of this invention are as follows: By using a camera recognition module and a control host to identify wrinkled stripes located in a horizontal two-dimensional coordinate system and determine the wrinkling direction, the direction in which the fabric needs to be unfolded can be indirectly determined. Furthermore, by using fabric positioning rollers placed at a special angle on the worktable, the fabric positioning rollers exert two pulling forces on the fabric in the direction of the flow and in the direction perpendicular to the flow direction. Since the fabric positioning rollers are symmetrically arranged on both sides of the fabric, the wrinkled stripes of the fabric can be pulled and unfolded towards both sides by these four symmetrical pulling forces and the direction perpendicular to the wrinkling direction. During the process, the camera recognition module monitors the horizontal projection area in real time to ensure that the wrinkled stripes are fully unfolded. The entire process is fully automated, and the fabric is adjusted in real time, avoiding manual operation and eliminating the risks associated with traditional transmission production methods. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. 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.

[0013] Figure 1 This is a top view of the laser cutting device for microfiber wiping cloth of the present invention when the wrinkled stripes are at 45 degrees.

[0014] Figure 2This is a top view of the laser cutting device for microfiber wiping cloth of the present invention when the wrinkled stripes are at 135 degrees.

[0015] Figure 3 This is a top view of the laser cutting device for microfiber wiping cloth of the present invention when the wrinkled stripes are at 90 degrees.

[0016] Figure 4 This is a top view of the laser cutting device for microfiber wiping cloth of the present invention when the wrinkled stripes are horizontal.

[0017] Figure 5 This is a side view of the laser cutting device of the present invention applicable to microfiber wiping cloth.

[0018] Figure 6 This is a flowchart of the cutting method steps of the laser cutting device applicable to microfiber wiping cloth of the present invention. Detailed Implementation

[0019] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0022] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0024] A preferred embodiment of the present invention is a laser cutting device suitable for microfiber wiping cloths, such as... Figure 1-5 As shown, the device includes a workstation 1, with a transfer station 2 on the upper surface for the fabric to move along the flow direction 200, and a cutting area 3 on the transfer station 2. The device also includes a laser cutting head 4, which is movably positioned above the cutting area 3 for cutting fabric 100; The device also includes a fabric positioning roller 5, one end of which is located on the transfer position 2 and the other end is located outside the transfer position 2. It is used to drive the fabric to move along the flow direction on the transfer position 2. One end of the fabric positioning roller 5 faces the flow direction and the angle 5b between the rotation axis 5a and the flow direction is an acute angle. There are four fabric positioning rollers 5, which are evenly divided into two groups and are axially symmetrically arranged on the left and right sides of the transfer position 2 to form a figure-eight arrangement. When the two fabric positioning rollers 5 on the left and right sides rotate, they can generate a forward driving force on the fabric in the flow direction, and at the same time generate a driving force in the direction away from the fabric, so as to cooperate with the fabric positioning rollers 5 in other positions to realize the pulling and unfolding of the fabric in all directions. The device also includes a rotary drive module 6 for driving the fabric positioning rollers 5. The rotary drive module 6 is provided with multiple corresponding to the multiple fabric positioning rollers 5 and operates independently of each other. This device also includes a camera recognition module 7, which is used to identify and acquire the horizontal projection area of ​​the wrinkled stripe 101 of the fabric, so as to quickly identify whether the wrinkled stripe is fully unfolded. In addition, the camera recognition module 7 also establishes a horizontal two-dimensional coordinate system 300 in the cutting area 3 and acquires the two-dimensional coordinates of the horizontal projection area and the stripe direction of the wrinkled stripe. Specifically, the stripe direction can be determined by fitting multiple coordinates of the wrinkled stripe. As an example, the wrinkled stripe is regarded as a fitted straight line. By calculating the coordinates of the two ends of the straight line as the two ends of the hypotenuse of a right triangle, the coordinates of the straight line, i.e. the hypotenuse of the aforementioned triangle, can be converted into angles by using trigonometric function formulas, and then the wrinkling direction can be determined. This is simple and convenient. The X-axis and Y-axis of the horizontal two-dimensional coordinate system divide the cutting area 3 into four quadrant recognition areas. Each of the four quadrant recognition areas corresponds to at least one fabric positioning roller 5. The device also includes a control host (not shown in the figure), which obtains the area value of the horizontal projection area in the four quadrant recognition areas according to the two-dimensional coordinates, and controls the rotation speed of at least one fabric positioning roller 5 located in the direction perpendicular to the wrinkling stripe direction according to the stripe direction. It should be further noted that the actions of the laser cutting head 4, the fabric positioning roller 5, the rotation drive module 6 and the camera recognition module 7 are all controlled by the control host. The camera recognition module 7, in conjunction with the control host, identifies the wrinkled stripes located in the horizontal two-dimensional coordinate system and determines the wrinkling direction, thereby indirectly determining the direction in which the fabric needs to be unfolded. Furthermore, the fabric positioning rollers 5, placed at a special angle on the workstation 1, exert two pulling forces on the fabric in the direction of the flow and in the direction perpendicular to the flow. Since the fabric positioning rollers 5 are symmetrically arranged on both sides of the fabric, the four symmetrical pulling forces and the direction perpendicular to the wrinkling direction can be used to pull the wrinkled stripes of the fabric to both sides and unfold them. During the process, the camera recognition module 7 monitors the horizontal projection area in real time to ensure that the wrinkled stripes are fully unfolded. The entire process is fully automated, and the fabric is adjusted in real time, avoiding manual operation and eliminating the risks associated with traditional transmission production methods.

[0025] During the actual cutting process, the fabric is laid on the transfer station 2, and the four corners of the fabric are pressed against the worktable 1 by four fabric positioning rollers 5. The camera recognition module 7 is then activated to identify the position and direction of the wrinkled stripes on the fabric. In practice, the directions of the wrinkled stripes are basically formed in the horizontal, vertical, 45-degree, and 135-degree directions within a horizontal two-dimensional coordinate system. To explain more clearly, if the wrinkling direction forms a 45-degree or 135-degree angle with the X-axis, specifically as follows... Figure 1 and 2 As shown, at this time, the multiple fabric positioning rollers 5 perpendicular to the wrinkling direction are two at a 135-degree angle. After this is determined, at least one fabric positioning roller 5 is controlled to rotate in the direction perpendicular to the wrinkling direction. When this fabric positioning roller 5 rotates, the other three fabric positioning rollers 5 remain stationary and in close contact with the fabric, thus allowing the fabric to be pulled and unfolded flat in the direction of the rotating fabric positioning roller 5. Alternatively, if the wrinkling direction is perpendicular to the X-axis, i.e., vertical, as shown... Figure 3 As shown, at this time, the multiple fabric positioning rollers 5 perpendicular to the wrinkling direction are two or four fabric positioning rollers 5 located on the left and right sides of the cutting area 3, that is, two on the left and two on the right. When the direction is determined, the two fabric positioning rollers 5 on the left and right sides rotate simultaneously while the two on the right remain stationary, or the four fabric positioning rollers 5 on the left and right sides rotate simultaneously towards each other, thereby stretching the wrinkled fabric to the left or both sides, and thus unfolding the wrinkled stripes; as another case, such as Figure 4As shown, the operating principle of the fabric positioning roller is basically the same as that described above, and will not be repeated here.

[0026] Preferably, the rotary drive module 6 is located at one end of the fabric positioning roller 5 outside the transfer position 2. Further, the device also includes a lifting module 8 for driving the rotary drive module 6 to rise and fall, a rotary module 9 for driving the lifting module 8 to rotate horizontally, an X-axis adjustment module 10 for adjusting the distance between two adjacent rotary modules 9 located on both sides of the transfer position 2 in a direction perpendicular to the flow direction, and a Y-axis adjustment module 11 for adjusting the distance between adjacent X-axis adjustment modules 10. The laser cutting head 4, camera recognition module 7, lifting module 8, rotary module 9, X-axis adjustment module 10, and Y-axis adjustment module 11 are all communicatively connected to the control host. The lifting module 8 can be used to adjust the contact pressure between the fabric positioning roller 5 and the fabric, while the rotary module 9 can be used to further increase the angular range of the horizontal force applied by the fabric positioning roller 5 to the fabric. The X-axis adjustment module 10 and the Y-axis adjustment module 11 are used to adjust the distance between two adjacent fabric positioning rollers 5 in the X-axis direction and the Y-axis direction (i.e., along the flow direction) to adapt to fabrics of different sizes.

[0027] Preferably, the camera recognition module 7 is movably positioned above the transfer position 2 via a first robotic arm (not shown), and the laser cutting head 4 is movably positioned above the transfer position 2 via a second robotic arm (not shown). Specifically, both the first and second robotic arms can be implemented by a multi-axis gantry or a multi-axis robotic arm.

[0028] Preferably, the cutting area 3 is a square, and the origin of the horizontal two-dimensional coordinate system coincides with the center of the cutting area 3, so as to facilitate the determination of the wrinkled stripes on the cutting area 3 in the coordinate system.

[0029] The preferred embodiment of the present invention describes a cutting method for a laser cutting device suitable for microfiber wiping cloths, such as... Figure 1-6 As shown, the method includes the following steps: Step S10: Divide the cutting area 3 on the transfer position 2 and establish a horizontal two-dimensional coordinate system on the cutting area 3. The center of the horizontal two-dimensional coordinate system is the center of the cutting area 3. The X-axis and Y-axis of the horizontal two-dimensional coordinate system divide the cutting area 3 into four quadrant recognition areas. Each of the four quadrant recognition areas corresponds to at least one fabric positioning roller 5. Step S20: Lay the fabric flat on the cutting area 3 along the flow direction, and press the edges of the fabric onto the transfer position 2 by multiple fabric positioning rollers 5; Step S30: Obtain image information of the fabric on the cutting area 3 through the camera recognition module 7, and obtain the two-dimensional coordinates of the horizontal projection area and the stripe direction based on the image information; Step S40: After determining the stripe direction, the rotation speed of at least one fabric positioning roller 5 located in the direction perpendicular to the stripe direction is increased by controlling the host machine to unfold the wrinkles of the fabric. Step S50: After the pleats are fully unfolded, the fabric is cut in the cutting area 3 using the laser cutting head 4.

[0030] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A laser cutting device suitable for microfiber wiping cloths, characterized in that, The device includes: The workstation has a conveyor on its upper surface for moving the fabric along the flow direction, and the conveyor has a cutting area. A laser cutting head is movably positioned above the cutting area for cutting fabric; A fabric positioning roller, with one end located on the transfer position and the other end located outside the transfer position, is used to drive the fabric to move along the flow direction on the transfer position. One end of the fabric positioning roller faces the flow direction and the angle between the rotation axis and the flow direction is an acute angle. Multiple fabric positioning rollers are provided and are evenly divided into two groups and are axially symmetrically arranged on the left and right sides of the transfer position. A rotary drive module is used to drive the fabric positioning rollers, and the rotary drive module is provided in multiple ways corresponding to the multiple fabric positioning rollers; A camera recognition module is used to identify and acquire the horizontal projection area of ​​the wrinkled stripes of the fabric, and to establish a horizontal two-dimensional coordinate system in the cutting area and acquire the two-dimensional coordinates of the horizontal projection area and the stripe direction of the wrinkled stripes. The X-axis and Y-axis of the horizontal two-dimensional coordinate system divide the cutting area into four quadrant recognition areas, and each of the four quadrant recognition areas corresponds to at least one fabric positioning roller. The control host obtains the area value of the horizontal plane projection area in the four quadrant recognition areas according to the two-dimensional coordinates, and controls the rotation speed of at least one of the fabric positioning rollers located in the direction perpendicular to the wrinkling stripe direction according to the stripe direction. The rotary drive module is located on one end of the fabric positioning roller outside the transfer position; the device also includes a lifting module for driving the rotary drive module to rise and fall, a rotary module for driving the lifting module to rotate horizontally, an X-axis adjustment module for adjusting the distance between two adjacent rotary modules located on both sides of the transfer position in a direction perpendicular to the flow direction, and a Y-axis adjustment module for adjusting the distance between adjacent X-axis adjustment modules; the lifting module, the rotary module, the X-axis adjustment module, and the Y-axis adjustment module are all communicatively connected to the control host.

2. The laser cutting device for microfiber wiping cloth according to claim 1, characterized in that, The camera recognition module is movably positioned above the transfer position via a first robotic arm, and the laser cutting head is movably positioned above the transfer position via a second robotic arm.

3. The laser cutting device for microfiber wiping cloth according to claim 1, characterized in that, The cutting area is square, and the origin of the horizontal two-dimensional coordinate system coincides with the center of the cutting area.

4. A cutting method for a laser cutting device suitable for microfiber wiping cloths, using the laser cutting device for microfiber wiping cloths as described in any one of claims 1-3, characterized in that, The method includes the following steps: A cutting area is divided at the transfer position, and a horizontal two-dimensional coordinate system is established on the cutting area. The center of the horizontal two-dimensional coordinate system is the center of the cutting area. The X-axis and Y-axis of the horizontal two-dimensional coordinate system divide the cutting area into four quadrant recognition areas. Each of the four quadrant recognition areas corresponds to at least one fabric positioning roller. The fabric is laid flat on the cutting area along the flow direction, and the edges of the fabric are pressed against the transfer position by multiple fabric positioning rollers. The camera recognition module acquires image information of the fabric on the cutting area, and obtains the two-dimensional coordinates of the horizontal projection area and the stripe direction based on the image information. After determining the stripe direction, the rotational speed of at least one fabric positioning roller located in a direction perpendicular to the stripe direction is increased by the control host to unfold the folds of the fabric. After the pleats are fully unfolded, the fabric is cut within the cutting area using the laser cutting head.

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