Laser cutting power adjustment method, system and laser cutting device

Abstract

The application discloses a laser cutting power adjusting method and system and a laser cutting device, and relates to the technical field of cutting. The adjusting method comprises the following steps: receiving a laser residual power value t of laser passing through a cutting object detected by a power meter while controlling a laser emitting device to output laser to the cutting object; and adjusting laser cutting power T of the laser emitting device until the received laser residual power value t is equal to a preset optimal laser residual power value tn when the laser residual power value t is greater than or less than the preset optimal laser residual power value tn. In the method, when laser cutting work is performed, the power of a laser beam can be automatically adjusted according to different fabrics and different thicknesses by means of judging the laser residual power value, energy can be saved, the situation of yellow edges caused by excessive power can be solved, the power of the laser beam is automatically adjusted, the influence of human factors is avoided, and the use efficiency and applicability of the laser cutting device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the cutting technical field, in particular to a laser cutting power adjusting method and system and a laser cutting device. BACKGROUND

[0002] The existing template machine adopts a laser cutting device, and the power of the laser beam emitted by the laser tube is manually adjusted according to different fabrics and thicknesses during operation. Thus, the adjustment of the power of the laser beam is artificially judged, and the small laser power adjustment may cause the cutting of the cloth to be not continuous, and the excessive power may cause the cutting to generate a yellow edge.

[0003] Therefore, how to improve the applicability of the power adjustment is a technical problem to be solved by those skilled in the art at present. SUMMARY

[0004] Therefore, the present application aims to provide a laser cutting power adjusting method and system with good applicability of power adjustment. Another object of the present application is to provide a laser cutting device applying the above laser cutting power adjusting method, which has good applicability of power adjustment.

[0005] To achieve the above objects, the present application provides the following technical solutions.

[0006] A laser cutting power adjusting method comprises the following steps:

[0007] receiving a laser residual power value t of the laser passing through the cutting object detected by a power meter while controlling the laser emitting device to output the laser to the cutting object;

[0008] adjusting the laser cutting power T of the laser emitting device until the received laser residual power value t is equal to the preset optimal laser residual power value tn when the laser residual power value t is greater than or less than the preset optimal laser residual power value tn.

[0009] Preferably, during the adjustment of the laser cutting power T of the laser emitting device, or at the same time or after the received laser residual power value t is equal to the preset optimal laser residual power value tn, the method further comprises:

[0010] judging the size relationship between the laser cutting power T of the laser emitting device and the preset maximum power Tmax of the laser emitting device;

[0011] If the laser cutting power T of the laser emitting device is less than the preset maximum laser emitting device power Tmax of the laser emitting device when the received laser residual power value t is equal to the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is adjusted to the preset maximum laser emitting device power Tmax, and the laser cutting speed on the cutting object is increased while keeping the received laser residual power value t equal to the preset optimal laser residual power value tn.

[0012] Preferably, in the process of adjusting the laser cutting power T of the laser emitting device, the method further comprises:

[0013] determining the size relationship between the laser cutting power T of the laser emitting device and the preset maximum laser emitting device power Tmax of the laser emitting device;

[0014] If the laser cutting power T of the laser emitting device is equal to the preset maximum laser emitting device power Tmax of the laser emitting device when the received laser residual power value t is less than the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is kept as the preset maximum laser emitting device power Tmax, and the laser cutting speed on the cutting object is decreased until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

[0015] Preferably, before the laser emitting device outputs laser to the cutting object, the method further comprises:

[0016] determining the corresponding preset optimal laser residual power value tn according to the type and thickness of the cutting object.

[0017] Preferably, while the laser emitting device outputs laser to the cutting object, the method further comprises:

[0018] determining whether the movement distance of the cutting object reaches the fabric replacement distance;

[0019] If yes, updating the preset optimal laser residual power value tn, and comparing the updated preset optimal laser residual power value tn with the received laser residual power value t.

[0020] A laser cutting power adjustment system, comprising:

[0021] a control module, configured to receive the laser residual power value t of the laser passing through the cutting object detected by the power meter while the laser emitting device outputs laser to the cutting object;

[0022] an adjusting module, configured to adjust the laser cutting power T of the laser emitting device when the received laser residual power value t is greater than or less than the preset optimal laser residual power value tn, until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

[0023] Preferably, the method further comprises:

[0024] a first judging module, configured to judge the size relationship between the laser cutting power T of the laser emitting device and the preset maximum laser emitting device power Tmax of the laser emitting device during the adjustment of the laser cutting power T of the laser emitting device.

[0025] If the laser cutting power T of the laser emitting device is less than the preset maximum laser emitting device power Tmax of the laser emitting device when the received laser residual power value t is equal to the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is adjusted to the preset maximum laser emitting device power Tmax, and the laser cutting speed on the cutting object is increased while keeping the received laser residual power value t equal to the preset optimal laser residual power value tn.

[0026] If the laser cutting power T of the laser emitting device is equal to the preset maximum laser emitting device power Tmax of the laser emitting device when the received laser residual power value t is less than the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is kept as the preset maximum laser emitting device power Tmax, and the laser cutting speed on the cutting object is decreased to make the received laser residual power value t equal to the preset optimal laser residual power value tn.

[0027] Preferably, the method further comprises:

[0028] an obtaining module, configured to determine the corresponding preset optimal laser residual power value tn according to the type and thickness of the cutting object.

[0029] Preferably, the method further comprises:

[0030] a second judging module, configured to judge whether the movement distance of the cutting object reaches the fabric replacement distance while the laser emitting device is controlled to output laser to the cutting object.

[0031] If yes, the preset optimal laser residual power value tn is updated, and the updated preset optimal laser residual power value tn is compared with the received laser residual power value t.

[0032] The laser cutting device applies the laser cutting power adjusting method, and comprises a platform, a power meter, a control box, a laser power supply box and a laser emitting device, the laser emitting device is connected to the laser power supply box, the laser emitting device and the power meter are both connected to the control box, a light hole is arranged through the platform in the up-down direction, the power meter is arranged below the platform and the light hole is located in the detection range of the power meter, and the emitting port of the laser emitting device is located above the platform and faces the platform.

[0033] The laser cutting power adjusting method and system can automatically adjust the power of the laser beam according to different fabrics and thicknesses, save energy, solve the yellow edge problem caused by excessive power, automatically adjust the power of the laser beam, avoid the influence of human factors, and improve the use efficiency and applicability of the laser cutting device.

[0034] The laser cutting device applying the laser cutting power adjusting method has good applicability of power adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0036] Figure 1 The structure diagram of the laser cutting device provided by the present application.

[0037] Reference signs:

[0038] Laser tube 1, laser beam 2, reflector 3, condenser 4, cutting fabric 5, platform 6, table surface 61, light hole 62, power meter 7, smoke exhaust device 8, control box 9, laser power supply box 10. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] The core of the present application is to provide a laser cutting power adjustment method and system, which has better applicability in power adjustment. Another core of the present application is to provide a laser cutting device applying the above laser cutting power adjustment method, which has better applicability in power adjustment.

[0041] The specific embodiment one of the laser cutting power adjustment method provided by the present application comprises the following steps:

[0042] S1: receiving the laser residual power value t of the laser passing through the cutting object detected by the power meter 7 while controlling the laser emitting device to output laser to the cutting object.

[0043] The cutting object is the cutting fabric 5, and in other embodiments, it can also be other objects, such as a plastic plate.

[0044] S2: adjusting the laser cutting power T of the laser emitting device when the laser residual power value t is greater than or less than the preset optimal laser residual power value tn, until the received laser residual power value t detected by the power meter 7 is equal to the preset optimal laser residual power value tn.

[0045] The laser cutting power T of the laser emitting device is the actual output power of the laser beam emitted by the laser emitting device. The laser cutting power T of the laser emitting device is adjusted by adjusting the current of the laser power supply connected to the laser emitting device.

[0046] In this embodiment, when performing laser cutting operation, the power of the laser beam 2 can be automatically adjusted according to the difference of the fabric and the thickness by judging the laser residual power value t, which can save energy, solve the problem of yellow edge caused by excessive power, and automatically adjust the power of the laser beam 2, avoiding the influence of human factors and improving the use efficiency and applicability of the laser cutting device.

[0047] Further, in the step of adjusting the laser cutting power T of the laser emitting device, or at the same time or after the step of receiving the laser residual power value t equal to the preset optimal laser residual power value tn, the method further comprises:

[0048] judging the size relationship between the laser cutting power T of the laser emitting device and the preset maximum laser emitting device power Tmax of the laser emitting device;

[0049] If the received laser residual power value t is equal to the preset optimal laser residual power value tn, and the laser cutting power T of the laser emitting device is less than the preset maximum laser emitting device power Tmax of the laser emitting device, the laser cutting power T of the laser emitting device is adjusted to the preset maximum laser emitting device power Tmax, and the laser cutting speed on the cutting object is increased while keeping the received laser residual power value t equal to the preset optimal laser residual power value tn.

[0050] The laser cutting speed on the cutting object is the relative movement speed of the laser and the cutting object. In the embodiment, the cutting object moves, and the laser emitting device remains stationary, so the movement speed of the cutting object corresponds to the laser cutting speed. The cutting fabric 5 moves on the platform 61 of the platform 6 by the driving of the fabric driving system, and the fabric driving system is connected to the control box 9. The movement speed of the cutting fabric 5 can be adjusted by outputting instructions to the fabric driving system through the control box 9. Of course, in other embodiments, if the laser emitting device is controlled to move while the cutting object remains unchanged, the movement speed of the laser emitting device is the laser cutting speed.

[0051] The preset maximum laser emitting device power Tmax can be the highest power that the structure of the laser emitting device allows to output, or can be a set power less than the highest power. When the laser residual power value t is equal to the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is the required minimum cutting power value Tmin.

[0052] The laser residual power value t is related to the cutting speed and the laser cutting power T. If the current laser cutting power T is the required minimum cutting power value Tmin, which is less than the preset maximum laser emitting device power Tmax, the laser emitting device can output higher power. By increasing the current laser cutting power T, the movement speed of the cutting fabric 5 is also increased to balance the part of the laser cutting power T that is higher than the required minimum cutting power value Tmin, so that the laser residual power value t is equal to the preset optimal laser residual power value tn, and the cutting efficiency can be improved due to the increase in the cutting speed.

[0053] Of course, in other embodiments, after the required minimum cutting power value Tmin is determined, the cutting speed can not be adjusted, but the cutting speed remains unchanged, and the laser cutting power T remains at the required minimum cutting power value Tmin for cutting.

[0054] Further, for the implementation of judging the size relationship between the laser cutting power T of the laser emitting device and the preset maximum laser emitting device power Tmax of the laser emitting device in the process of adjusting the laser cutting power T of the laser emitting device, if the laser cutting power T of the laser emitting device is equal to the preset maximum laser emitting device power Tmax of the laser emitting device, and the received laser residual power value t is still less than the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is kept to the preset maximum laser emitting device power Tmax, and the movement speed of the cutting object is reduced until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

[0055] That is, at this time, the required minimum cutting power value Tmin is greater than the preset maximum laser emitting device power Tmax, and even if the laser cutting power T is increased to the preset maximum laser emitting device power Tmax, the required minimum cutting power value Tmin cannot be reached, and solely relying on adjusting the laser cutting power T of the laser emitting device cannot meet the requirement that the laser residual power value t is equal to the preset optimal laser residual power value tn. At this time, by reducing the cutting speed, the laser residual power value t is ensured to be equal to the preset optimal laser residual power value tn, without replacing the laser emitting device, and the flexibility of use can be ensured.

[0056] Further, before the step of controlling the laser emitting device to output laser to the cutting object, the corresponding preset optimal laser residual power value tn is determined according to the type and thickness of the cutting object.

[0057] The preset optimal laser residual power value tn corresponds to the type and thickness of the fabric. Before laser cutting, the preset optimal laser residual power value tn of different types and thicknesses of fabrics is measured and calculated by experience, and is one-to-one corresponding to the fabric and the thickness, and the one-to-one correspondence relationship between the fabric and the preset optimal laser residual power value tn is input into the control box 9. When the control box 9 receives the type and thickness of the cutting fabric 5 on the platform 6 of the platform 6, the corresponding preset optimal laser residual power value tn is determined. Specifically, before laser cutting, the control box 9 can receive the type and thickness of the fabric input by a person, then automatically retrieve the corresponding preset optimal laser residual power value tn, and then perform subsequent cutting operation.

[0058] Of course, when the type and thickness of the cutting fabric 5 do not match the pre-stored fabric type or thickness in the control box 9, the laser jog cutting can be selected in the control box 9, the preset optimal laser residual power value tn is determined by the on-site operator, and then the normal cutting operation is performed.

[0059] Further, in the step of controlling the laser emitting device to output laser to the cutting object,

[0060] determining whether the motion distance of the cutting object reaches the fabric replacement distance;

[0061] If yes, updating the preset optimal laser residual power value tn, and comparing the updated preset optimal laser residual power value tn with the received laser residual power value t.

[0062] Since the thickness and type of the fabric at different positions may change in one cutting operation, the preset optimal laser residual power value tn also changes accordingly. Taking the set position on the cutting fabric 5 as the base point, the fabric replacement distance is the distance between the critical point where the thickness or type of the fabric changes and the base point. Before cutting, the preset optimal laser residual power values tn corresponding to the laser fabrics at different positions are received and pre-stored, and the preset optimal laser residual power value tn is updated in real time according to the current motion distance of the cutting fabric 5 during cutting. This can improve the cutting efficiency and adaptability, and does not need to always use the maximum preset optimal laser residual power value tn at different positions of the cutting fabric 5 as the cutting reference, which can reduce energy waste and avoid cutting yellow edges.

[0063] In addition to the above laser cutting power adjustment method, the application also provides a laser cutting power adjustment system applied to the above laser cutting power adjustment method, and the beneficial effects can be correspondingly referred to the above various embodiments.

[0064] The laser cutting power adjustment system comprises:

[0065] The control module is configured to receive the laser residual power value t of the laser passing through the cutting object detected by the power meter 7 while controlling the laser emission device to output laser to the cutting object.

[0066] The adjustment module is configured to adjust the laser cutting power T of the laser emission device when the laser residual power value t is greater than or less than the preset optimal laser residual power value tn, until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

[0067] Further, it further comprises:

[0068] The first determination module is configured to determine the size relationship between the laser cutting power T of the laser emission device and the preset maximum power Tmax of the laser emission device during the adjustment of the laser cutting power T of the laser emission device.

[0069] If the laser cutting power T of the laser emitting device is less than the preset laser emitting device maximum power Tmax of the laser emitting device when the received laser residual power value t is equal to the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is adjusted to the preset laser emitting device maximum power Tmax, and the laser cutting speed on the cutting object is increased while keeping the received laser residual power value t equal to the preset optimal laser residual power value tn.

[0070] If the laser cutting power T of the laser emitting device is equal to the preset laser emitting device maximum power Tmax of the laser emitting device and the received laser residual power value t is less than the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is kept as the preset laser emitting device maximum power Tmax, and the laser cutting speed on the cutting object is reduced so that the received laser residual power value t is equal to the preset optimal laser residual power value tn.

[0071] Further, the method further comprises:

[0072] The calling module is configured to determine the corresponding preset optimal laser residual power value tn according to the type and thickness of the cutting object.

[0073] Further, the method further comprises:

[0074] The second judging module is configured to judge whether the movement distance of the cutting object reaches the fabric replacement distance while controlling the laser emitting device to output laser to the cutting object.

[0075] If yes, the preset optimal laser residual power value tn is updated, and the updated preset optimal laser residual power value tn is compared with the received laser residual power value t.

[0076] In addition to the above laser cutting power adjustment method and system, as shown in the drawings, the present application also provides a laser cloth cutting device, which applies the above laser cutting power adjustment method and system to realize automatic adjustment of laser cloth cutting power, and the beneficial effects can be correspondingly referred to the above various embodiments. Figure 1

[0077] Specifically, the laser cutting device comprises a platform 6, a power meter 7, a control box 9, a laser power supply box 10 and a laser emitting device, the laser emitting device is connected to the laser power supply box 10, the laser emitting device and the power meter 7 are connected to the control box 9, the light hole 62 is provided through the platform 6 in the up-down direction, the power meter 7 is arranged below the platform 6, and the light hole 62 is located in the detection range of the power meter 7, and the emitting port of the laser emitting device is located above the platform 6 and faces the platform 6.

[0078] ​The laser emitting device specifically comprises a laser tube 1, a reflecting mirror 3 and a condenser 4. The laser tube 1 is horizontally arranged and outputs a laser beam 2 in the horizontal direction. The reflecting mirror 3 is arranged at the outlet of the laser tube 1 so that the laser beam 2 is emitted vertically downward. The condenser 4 is arranged below the reflecting mirror 3. The laser beam 2 emitted downward is emitted to the cutting fabric 5 again after passing through the condenser 4.

[0079] The smoke exhaust device 8 can also be arranged below the platform 6. The power meter 7 is arranged in the smoke exhaust device 8 to exhaust smoke in time.

[0080] The working process of the laser fabric cutting device in the embodiment is as follows: before laser cutting operation is performed on the cutting fabric 5, the type and thickness of the fabric are selected. The control box 9 outputs the preset optimal laser residual power value tn. When the laser cutting device starts to operate, the laser beam 2 emitted by the laser tube 1 is reflected by the reflecting mirror 3 and focused on the cutting fabric 5 by the focusing lens to perform cutting operation. The residual laser beam 2 after cutting is emitted to the power meter 7. The power meter 7 feeds back the read laser residual power value t to the control box 9. When the laser residual power value t is greater than the preset optimal laser residual power value tn, the control box 9 controls the laser power supply box 10 to reduce the laser cutting power T until the laser residual power value t is equal to the preset optimal laser residual power value tn. When the laser residual power value t is less than the preset optimal laser residual power value tn, the control box 9 controls the laser power supply box 10 to increase the laser cutting power T until the laser residual power value t is equal to the preset optimal laser residual power value tn. When the laser residual power value t is equal to the preset optimal laser residual power value tn, the laser power at this time is the required minimum cutting power value Tmin. When the required minimum cutting power value Tmin is less than the preset laser emitting device maximum power Tmax, the control box 9 controls the laser cutting device to increase the laser cutting speed d and adaptively adjust the laser cutting power T while keeping the laser residual power value t equal to the preset optimal laser residual power value tn.

[0081] In the embodiment, the preset optimal laser residual power value tn of different fabric types is set in the control box. Then, the laser power meter is arranged below the laser cutting operation point to read the laser residual power value t in real time. The laser cutting power is adjusted in real time by comparing the laser residual power value t and the preset optimal laser residual power value tn, so that the problem of fabric yellowing and burning caused by too high laser cutting power can be solved. When the laser tube minimum cutting power value Tmin is reached by comparing the laser residual power value t and the preset optimal laser residual power value tn, the required minimum cutting power value Tmin and the preset laser emitting device maximum power Tmax are compared. When Tmin is less than Tmax, the control box can adjust the laser cutting speed in real time to improve the working efficiency of the laser cutting device.

[0082] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly on the other element or intervening elements can also be present. In addition, the term "a plurality" as used herein means two or more.

[0083] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, specify relative positions or orientation relationships based on the positions or orientation relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0085] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] The above describes in detail the laser cutting power adjustment method, system and laser cutting device provided by the present application. The principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A method of laser cutting power adjustment, characterized by, The method comprises the following steps: receiving the laser residual power value t of the laser passing through the cutting object detected by the power meter (7) while controlling the laser emitting device to output laser to the cutting object; adjusting the laser cutting power T of the laser emitting device when the laser residual power value t is greater than or less than the preset optimal laser residual power value tn until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

2. The laser cutting power adjustment method of claim 1, wherein, During the process of adjusting the laser cutting power T of the laser emitting device, or at the same time or after the received laser residual power value t is equal to the preset optimal laser residual power value tn, the method further comprises the following steps: judging the size relationship between the laser cutting power T of the laser emitting device and the preset maximum power Tmax of the laser emitting device; if the laser cutting power T of the laser emitting device is less than the preset maximum power Tmax of the laser emitting device when the received laser residual power value t is equal to the preset optimal laser residual power value tn, adjusting the laser cutting power T of the laser emitting device to the preset maximum power Tmax of the laser emitting device, and increasing the laser cutting speed of the cutting object while keeping the received laser residual power value t equal to the preset optimal laser residual power value tn.

3. The method of laser cutting power adjustment of claim 1, wherein, During the process of adjusting the laser cutting power T of the laser emitting device, the method further comprises the following steps: judging the size relationship between the laser cutting power T of the laser emitting device and the preset maximum power Tmax of the laser emitting device; if the received laser residual power value t is less than the preset optimal laser residual power value tn when the laser cutting power T of the laser emitting device is equal to the preset maximum power Tmax of the laser emitting device, keeping the laser cutting power T of the laser emitting device as the preset maximum power Tmax of the laser emitting device, and reducing the laser cutting speed of the cutting object until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

4. The method of laser cutting power adjustment of claim 1, wherein, Before the step of controlling the laser emitting device to output laser to the cutting object, the method further comprises the following step: determining the corresponding preset optimal laser residual power value tn according to the type and thickness of the cutting object.

5. The method of laser cutting power adjustment according to any one of claims 1 to 4, characterized in that, While controlling the laser emitting device to output laser to the cutting object, the method further comprises the following step: judging whether the movement distance of the cutting object reaches the fabric replacement distance; if yes, updating the preset optimal laser residual power value tn, and comparing the updated preset optimal laser residual power value tn with the received laser residual power value t.

6. A laser cutting power regulation system characterized by, The method comprises the following steps: a control module for receiving the laser residual power value t of the laser passing through the cutting object detected by the power meter (7) while controlling the laser emitting device to output laser to the cutting object; an adjusting module for adjusting the laser cutting power T of the laser emitting device when the laser residual power value t is greater than or less than the preset optimal laser residual power value tn until the received laser residual power value t is equal to the preset optimal laser residual power value tn.

7. The laser cutting power regulation system of claim 6, wherein, The method further comprises the following steps: The first judging module is configured to judge the relationship between the laser cutting power T of the laser emitting device and the preset maximum laser emitting power Tmax of the laser emitting device during the adjustment of the laser cutting power T of the laser emitting device. If the laser cutting power T of the laser emitting device is less than the preset maximum laser emitting power Tmax of the laser emitting device when the received laser residual power value t is equal to the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is adjusted to the preset maximum laser emitting power Tmax, and the laser cutting speed on the cutting object is increased while keeping the received laser residual power value t equal to the preset optimal laser residual power value tn. If the laser cutting power T of the laser emitting device is equal to the preset maximum laser emitting power Tmax of the laser emitting device when the received laser residual power value t is less than the preset optimal laser residual power value tn, the laser cutting power T of the laser emitting device is kept as the preset maximum laser emitting power Tmax, and the laser cutting speed on the cutting object is decreased to make the received laser residual power value t equal to the preset optimal laser residual power value tn.

8. The laser cutting power regulation system of claim 6, wherein, Further comprising: The calling module is configured to determine the corresponding preset optimal laser residual power value tn according to the type and thickness of the cutting object.

9. The laser cutting power regulation system according to any one of claims 6 to 8, characterized in that, Further comprising: The second judging module is configured to judge whether the movement distance of the cutting object reaches the fabric replacement distance while the laser emitting device is controlled to output laser to the cutting object. If yes, the preset optimal laser residual power value tn is updated, and the updated preset optimal laser residual power value tn is compared with the received laser residual power value t.

10. A laser cutting apparatus characterized by comprising: The laser cutting power adjustment method according to any one of claims 1 to 5; the laser cutting device comprises a platform (6), a power meter (7), a control box (9), a laser power supply box (10), and a laser emitting device, the laser emitting device is connected to the laser power supply box (10), the laser emitting device and the power meter (7) are both connected to the control box (9); the platform (6) is provided with a light hole (62) penetrating in the up-down direction, the power meter (7) is arranged below the platform (6), and the light hole (62) is located in the detection range of the power meter (7); the emitting port of the laser emitting device is located above the platform (6) and faces the platform (6).

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