An automatic correction mechanism for a CNC laser cutting machine

Abstract

This utility model relates to the field of textile machinery manufacturing, and more particularly to an automatic correction mechanism for a CNC laser cutting machine. The mechanism includes a CNC laser cutting machine with a feeding machine at the front and a processing table in the middle. First transverse electric slide rails are installed on both sides of the machine, and both slide rails are connected to a moving plate. A base plate is connected to the bottom of the moving plate, and the bottom of the base plate is slidably connected to the processing table. An electric push rod is installed on the moving plate, with its piston rod pointing downwards and connected to a pressure plate. The pressure plate and the base plate engage in a pressing fit. A tensioning component for spreading the fabric is located at the front of the CNC laser cutting machine. Through the alternating distribution of rubber pads and Velcro on the surface of the base plate, combined with the downward pressing action of the pressure plate driven by the electric push rod, a multi-point elastic clamping structure is formed. This achieves rapid fixing during the initial fabric laying stage, replacing traditional manual pressing and pulling operations, and ensuring uniform force on the fabric when it is spread out.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery manufacturing, and in particular to an automatic correction mechanism for a CNC laser cutting machine. Background Technology

[0002] Laser cutting technology, with its high precision and non-contact processing advantages, has become a core process for fabric cutting in the textile industry, widely used in the processing of flexible materials such as clothing, home textiles, and automotive interiors. Compared to traditional mechanical die cutting, it achieves precise cutting of complex patterns through thermal effects, producing clean, burr-free cuts and eliminating the problem of tool wear. However, as a flexible material, fabric is susceptible to tension fluctuations and guide roller skew during continuous conveying, resulting in lateral offset and causing the cutting path to deviate from the preset trajectory. This problem is particularly prominent in the processing of wide or elastic fabrics, necessitating dynamic correction technology to ensure cutting accuracy.

[0003] Existing CNC laser cutting equipment heavily relies on manual operation during the fabric feeding stage: the fabric must be manually pulled through the guide roller group, tension module, and cutting area, and the initial position must be adjusted to align with the coordinate reference via the control panel. For wide-format equipment, this requires multiple people working together, which is time-consuming and labor-intensive, and manual pulling can easily cause localized deformation of the fabric, affecting cutting accuracy. In addition, although the equipment can achieve step feeding by driving the guide rollers with servo motors, it lacks real-time correction functionality. The "snake-like deviation" caused by uneven friction or roll winding deviation of the fabric cannot be automatically suppressed, requiring frequent machine stops for manual resetting, which severely restricts production efficiency.

[0004] Traditional manual correction methods have significant drawbacks: First, the entire process of manual traction and fabric leveling is labor-intensive, relies on operational experience, and is difficult to adapt to the needs of mass production; second, manual leveling is inefficient, and it is difficult to ensure the flatness of the entire width for thin and highly elastic fabrics. Local wrinkles or looseness can easily cause laser focus deviation, resulting in uneven cutting depth or contour distortion; third, the lack of correction function prevents the equipment from forming a closed-loop control, hindering intelligent upgrades. Utility Model Content

[0005] To overcome the drawback of relying on manual leveling, this utility model provides an automatic correction mechanism for a CNC laser cutting machine, aiming to solve the above-mentioned shortcomings.

[0006] An automatic correction mechanism for a CNC laser cutting machine includes the CNC laser cutting machine, a feeding machine at the front of the CNC laser cutting machine, a processing table in the middle of the CNC laser cutting machine, first horizontal electric slide rails and several second vertical electric slide rails installed on both sides of the CNC laser cutting machine, and all the second electric slide rails on the same side jointly drive the first electric slide rails. The first electric slide rails on both sides are connected to a moving plate, and a base plate is connected to the bottom of the moving plate. The bottom of the base plate is slidably connected to the processing table. An electric push rod is installed on the moving plate. The piston rod of the electric push rod faces downward and is connected to a pressure plate. The pressure plate is pressed and engaged with the base plate. A tensioning component for spreading the fabric is provided at the front end of the CNC laser cutting machine.

[0007] Furthermore, it is particularly preferred that the tensioning assembly includes a fixed plate, one side of which is connected to the front end of the CNC laser cutting machine, and an infrared sensor is installed on the other side of the fixed plate. A connecting plate is slidably connected inside the fixed plate, and a leveling roller is rotatably connected between the left and right connecting plates. The leveling roller has a larger diameter in the middle and smaller diameters at both ends. A guide rod is connected to one side of the fixed plate, and the connecting plate is slidably connected to the guide rod. A motor is installed on the top of the other side of the fixed plate, and a lead screw is rotatably connected to the fixed plate on that side. The output shaft of the motor is connected to the top of the lead screw, and the lead screw is threadedly connected to the connecting plate.

[0008] Furthermore, it is particularly preferred that the leveling roller sleeve is provided with a threaded sleeve.

[0009] Furthermore, it is particularly preferred that the pressure plate and the bottom plate are connected to a number of rubber pads on the adjacent side.

[0010] Furthermore, it is particularly preferred that the pressure plate and the bottom plate are connected to a plurality of sections of hook and loop fasteners on the adjacent side, and the hook and loop fasteners and the adhesive pads are alternately distributed.

[0011] Furthermore, it is particularly preferred that a protective housing is connected to the side of each of the two fixed plates that are separated from each other. The protective housing is used to enclose the lead screw and the guide rod, and the connecting plate is slidably connected to the protective housing.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. Through the alternating distribution of rubber pads and Velcro on the surface of the base plate, combined with the downward pressing action of the pressure plate driven by the electric push rod, a multi-point elastic clamping structure is formed, which can quickly fix the fabric in the initial laying stage, replacing the traditional manual pressing and pulling operation, and ensuring that the fabric is evenly stressed when unfolded.

[0014] 2. Utilizing the bidirectional threaded protrusions of the threaded sleeve and the gradient pressure distribution characteristics of the leveling roller, the fabric automatically unfolds to both sides during the fabric conveying process. Infrared sensors monitor the edge position of the fabric in real time. When a fold or offset is detected, the height of the leveling roller is adjusted via a motor-driven screw, forming a closed-loop system of "detection-feedback-adjustment". Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the installation structure of the movable plate and electric push rod of this utility model.

[0017] Figure 3 This is a schematic diagram showing the connection relationship between the connecting plate and the lead screw of this utility model.

[0018] The markings in the diagram are as follows: 1-CNC laser cutting machine, 2-feeding machine, 3-processing table, 4-first electric slide rail, 5-second electric slide rail, 6-moving plate, 7-electric push rod, 8-pressure plate, 9-base plate, 10-fixed plate, 11-infrared sensor, 12-motor, 13-connecting plate, 14-lead screw, 15-leveling roller, 16-guide rod, 17-threaded sleeve, 18-rubber pad, 19-Velcro, 20-protective shell. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] Example: An automatic correction mechanism for a CNC laser cutting machine, such as... Figure 1 and Figure 2As shown, the system includes a CNC laser cutting machine 1, a feeding machine 2, a processing table 3, a first electric slide rail 4, a second electric slide rail 5, a moving plate 6, an electric push rod 7, a pressure plate 8, a base plate 9, and a tensioning assembly. The feeding machine 2 is located in front of the CNC laser cutting machine 1, and the processing table 3 is located in the middle of the CNC laser cutting machine 1. The left and right sides of the CNC laser cutting machine 1 are equipped with a horizontal first electric slide rail 4 and several vertical second electric slide rails 5. All the second electric slide rails 5 on the same side jointly drive the first electric slide rail 4. The first electric slide rails 4 on both sides are connected to the moving plate 6. When the first electric slide rail 4 is activated, it drives the moving plate 6 and the connected pressure plate 8 and base plate 9 to move backward, dragging the fabric through the area of ​​the processing table 3. When the base plate 9 disengages from the processing table 3, the second electric slide rails 5 drive the first electric slide rail 4 to move downward. At this time, the length of the processing table 3 is less than the travel of the slide rails, allowing the fabric to be accurately placed onto the surface of the conveyor belt of the processing table 3. The bottom of the movable plate 6 is connected to the base plate 9, and the bottom of the base plate 9 is slidably connected to the processing table 3. An electric push rod 7 is installed on the movable plate 6. The piston rod of the electric push rod 7 faces downward and is connected to the pressure plate 8. The pressure plate 8 and the base plate 9 are pressed together. After the electric push rod 7 is started, its piston rod drives the pressure plate 8 to press down vertically, forming a clamping structure with the base plate 9. The rigid structure of the pressure plate 8 and the sliding connection characteristics of the base plate 9 ensure that the fabric can still move smoothly along the direction of the processing table 3 in the clamping state. The front end of the CNC laser cutting machine 1 is equipped with a tensioning component for spreading the fabric.

[0021] like Figure 1 and Figure 3 As shown, the tensioning assembly includes a fixed plate 10, an infrared sensor 11, a motor 12, a connecting plate 13, a lead screw 14, a leveling roller 15, and a guide rod 16. One side of the fixed plate 10 is connected to the front end of the CNC laser cutting machine 1, and the infrared sensor 11 is installed on the other side of the fixed plate 10. The connecting plate 13 is slidably connected inside the fixed plate 10, and the leveling roller 15 is rotatably connected between the left and right connecting plates 13. The leveling roller 15 has a large diameter in the middle and a small diameter at both ends. The structural characteristic of the leveling roller 15 with a large diameter in the middle causes it to generate gradient pressure on the fabric: the pressure is greatest in the central area and decreases towards both ends. The reduction creates a natural flattening effect. One side of the fixed plate 10 is connected to a guide rod 16, and the connecting plate 13 is slidably connected to the guide rod 16. The top of the other side of the fixed plate 10 is equipped with a motor 12, and the fixed plate 10 on this side is rotatably connected to a lead screw 14. The output shaft of the motor 12 is connected to the top of the lead screw 14, and the lead screw 14 is threadedly connected to the connecting plate 13. After receiving the control signal, the motor 12 drives the lead screw 14 to drive the connecting plate 13 to move vertically along the guide rod 16, thereby adjusting the height of the flattening roller 15. The system calculates the optimal pressure value in real time based on the remaining fabric roll diameter and dynamically adjusts the position of the roller.

[0022] like Figure 3As shown, it also includes a threaded sleeve 17. The leveling roller 15 is fitted with the threaded sleeve 17. The threaded sleeve 17 has threaded protrusions on both sides that are opposite to each other. When the fabric passes through the threaded sleeve 17, the bidirectional threaded protrusions on its surface rotate with the movement of the fabric, spreading the fabric evenly from the center to both sides.

[0023] like Figure 2 As shown, it also includes rubber pads 18, and several sections of rubber pads 18 are connected to the adjacent side of the pressure plate 8 and the base plate 9.

[0024] like Figure 2 As shown, it also includes hook and loop fasteners 19. Several sections of hook and loop fasteners 19 are connected to the adjacent side of the pressure plate 8 and the base plate 9, and the hook and loop fasteners 19 and the adhesive pads 18 are distributed alternately.

[0025] like Figure 1 As shown, it also includes a protective housing 20. The protective housing 20 is connected to the side of the two fixed plates 10 that are separated. The protective housing 20 is used to wrap the lead screw 14 and the guide rod 16. The connecting plate 13 is slidably connected to the protective housing 20. The protective housing 20 completely wraps the moving pair of the lead screw 14 and the guide rod 16. The interior is equipped with a labyrinth dustproof structure to prevent fiber debris from entering the precision transmission components. A visual observation window is opened on the side wall of the housing to facilitate maintenance personnel to quickly check the status of the internal mechanism.

[0026] When a roll of fabric needs to be cut, the fabric is placed on the unloading machine 2. The unloading machine 2 is powered and can roll up the fabric. After the worker pulls out the fabric, it passes over the threaded sleeve 17, and the pulled-out part of the fabric is placed on the base plate 9. One end of the fabric is close to the side of the base plate 9, and the adhesive pad 18 and Velcro 19 on the base plate 9 temporarily fix the fabric. Then, one hand holds the fabric already placed on the base plate 9, and the other hand pulls the fabric to ensure that the fabric is taut before letting it down. This operation is repeated to ensure that the fabric attached to the base plate 9 is completely flat. Then, the electric push rod 7 is activated, which pushes the pressure plate 8 to move downward. The pressure plate 8 and the base plate 9 together squeeze the fabric to maintain the unfolded effect of the fabric. Then, the motor 12 is activated, and the motor 12 drives the leveling roller 15 to move up and down through the lead screw 14, thereby adjusting the tension of the fabric. First, the first electric slide rail 4 is activated, which moves the moving plate 6 backward, thereby causing the pressure plate 8 and the bottom plate 9 that clamp the fabric to also move backward, pulling the fabric through the processing table 3. The bottom plate 9 then disengages from the processing table 3. Next, the second electric slide rail 5 is activated, which drives the first electric slide rail 4 downward as a whole. Since the length of the processing table 3 is less than that of the first electric slide rail 4, when the bottom plate 9 is suspended in the air, the second electric slide rail 5 pushes the pressure plate 8 and the bottom plate 9 downward through the first electric slide rail 4, so that the fabric comes into contact with the processing table 3. The surface of the processing table 3 is equipped with a conveyor belt to stabilize the fabric transport, thereby ensuring the continuous transport of the fabric during cutting. At this time, the electric push rod 7 is activated, which pulls the pressure plate 8 to disengage from the bottom plate 9, releasing the fabric. The second electric slide rail 5 then drives the first electric slide rail 4 to return to its original position, without affecting the transport of the fabric.

[0027] After starting the CNC laser cutting machine 1, the fabric is detached from the feeding machine 2. When it passes through the threaded sleeve 17, it drives the threaded sleeve 17 and the leveling roller 15 to rotate together. Moreover, the threads on the threaded sleeve 17 can spread the fabric to both sides, so the infrared sensor 11 can detect the width of the fabric from both ends. If the detected width is less than the width of the fabric, it indicates that there is a folded area in the fabric. At this time, the motor 12 is started. The motor 12 drives the connecting plate 13 to move upward through the lead screw 14. The connecting plate 13 slides upward along the fixed plate 10, and the guide rod... 16. Ensure the stability of the sliding of the connecting plate 13, increase the pressure between the threaded sleeve 17 and the fabric, so that the fabric and the threaded sleeve 17 fit more closely, optimize the unfolding effect of the thread on the fabric. When the fabric is unfolded and conveyed, the height of the leveling roller 15 needs to be adjusted in real time according to the amount of remaining fabric to ensure the tension of the fabric before it contacts the processing table 3. Then, the start and stop of the motor 12 are linked to the control of the CNC laser cutting machine 1, and the power of the feeding machine 2 is also linked to the control of the CNC laser cutting machine 1, further ensuring the flatness of the fabric and completing the cutting work of the fabric.

[0028] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. An automatic correction mechanism for a CNC laser cutting machine, characterized in that, The system includes a CNC laser cutting machine (1), a feeding machine (2) is provided in front of the CNC laser cutting machine (1), a processing table (3) is provided in the middle of the CNC laser cutting machine (1), a first electric slide rail (4) is installed on both the left and right sides of the CNC laser cutting machine (1) and several second electric slide rails (5) are installed in the longitudinal direction, and all the second electric slide rails (5) on the same side drive the first electric slide rail (4) together. The first electric slide rails (4) on both sides are connected to a moving plate (6), and a base plate (9) is connected to the bottom of the moving plate (6). The bottom of the base plate (9) is slidably connected to the processing table (3). An electric push rod (7) is installed on the moving plate (6). The piston rod of the electric push rod (7) faces downward and is connected to a pressure plate (8). The pressure plate (8) is pressed and cooperated with the base plate (9). A tensioning component for stretching the fabric is provided at the front end of the CNC laser cutting machine (1).

2. The automatic correction mechanism for a CNC laser cutting machine according to claim 1, characterized in that, The tensioning assembly includes a fixed plate (10), one side of which is connected to the front end of the CNC laser cutting machine (1), and an infrared sensor (11) is installed on the other side of the fixed plate (10). A connecting plate (13) is slidably connected inside the fixed plate (10). A leveling roller (15) is rotatably connected between the connecting plates (13) on both sides. The leveling roller (15) has a large diameter in the middle and a small diameter at both ends. A guide rod (16) is connected to one side of the fixed plate (10), and the connecting plate (13) is slidably connected to the guide rod (16). A motor (12) is installed on the top of the fixed plate (10) on the other side, and a lead screw (14) is rotatably connected to the fixed plate (10) on that side. The output shaft of the motor (12) is connected to the top of the lead screw (14), and the lead screw (14) is threadedly connected to the connecting plate (13).

3. An automatic correction mechanism for a CNC laser cutting machine according to claim 2, characterized in that, The leveling roller (15) is fitted with a threaded sleeve (17).

4. An automatic correction mechanism for a CNC laser cutting machine according to claim 3, characterized in that, Several rubber pads (18) are connected to the adjacent side of the pressure plate (8) and the bottom plate (9).

5. An automatic correction mechanism for a CNC laser cutting machine according to claim 4, characterized in that, The pressure plate (8) and the base plate (9) are connected to a number of Velcro strips (19) on their adjacent sides, and the Velcro strips (19) and the adhesive pads (18) are distributed alternately.

6. An automatic correction mechanism for a CNC laser cutting machine according to claim 5, characterized in that, The two fixing plates (10) are connected to a protective shell (20) on opposite sides. The protective shell (20) is used to wrap the lead screw (14) and the guide rod (16). The connecting plate (13) is slidably connected to the protective shell (20).

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