Cutting head structure of numerical control optical fiber laser metal cutting machine

Abstract

The utility model discloses a cutting head structure of a numerical control optical fiber laser metal cutting machine, which comprises a cutting head shell, a nozzle and an optical fiber connector, the top of the cutting head shell is connected with the optical fiber connector, the bottom of the cutting head shell is connected with the nozzle, a focus lens and a protective lens are arranged in the cutting head shell, and the focus lens is provided with a focus lens protective cover. A protective mirror cover is arranged outside the protective mirror, a blowing connector is arranged on the side face of the cutting head shell, double protective mirrors are arranged on the upper portion and the lower portion of the focusing mirror respectively, the protective mirrors comprise the upper protective mirror and the lower protective mirror, the upper protective mirror is arranged above the focusing mirror, and the lower protective mirror is arranged below the focusing mirror. And an integrated circuit board is arranged on the outer side of the cutting head shell. According to the laser cutting device, the structure of double protective glasses is adopted, the optical sensor is used in cooperation to monitor the light transmittance of the protective glasses, the light transmittance of the lenses and the focusing accuracy of laser beams can be guaranteed, and it is guaranteed that the cutting precision is not affected; in addition, the mass flow controller is used for adjusting the flow and the pressure of the gas so as to flexibly cope with the cutting of metals with different thicknesses and materials.

Description

Technical Field

[0001] This utility model mainly relates to the field of laser metal cutting equipment technology, specifically a cutting head structure for a CNC fiber laser metal cutting machine. Background Technology

[0002] CNC fiber laser metal cutting machines are high-precision, high-speed, and high-efficiency metal processing equipment, widely used for cutting metal sheets and pipes. The cutting head, as a key component of the cutting machine, directly affects the cutting quality and efficiency.

[0003] However, current cutting head structures still have some shortcomings, such as the following:

[0004] 1. Focusing accuracy issue: Existing focusing lenses are affected by spatter and dust during the cutting process, which affects the light transmittance of the lens and leads to inaccurate laser beam focusing, thus affecting the cutting accuracy.

[0005] 2. Limitations of nozzle performance: The structure and gas channel design of traditional nozzles are not flexible enough when cutting metals of different thicknesses and materials. For thick plate cutting, it may not be able to provide enough high-pressure gas to effectively blow away the molten slag; while for thin plate cutting, excessive gas pressure may cause deformation of the cutting surface. Utility Model Content

[0006] This utility model mainly provides a cutting head structure for a CNC fiber laser metal cutting machine to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A cutting head structure for a CNC fiber laser metal cutting machine includes a cutting head housing, a nozzle, and a fiber optic connector. The top of the cutting head housing is connected to the fiber optic connector, and the bottom of the cutting head housing is connected to the nozzle. A focusing lens and a protective lens are disposed inside the cutting head housing. The focusing lens is provided with a focusing lens protective cover, and the protective lens is provided with a protective lens cover. An air blowing connector is installed on the side of the cutting head housing. Double protective lenses are provided above and below the focusing lens. The protective lens includes an upper protective lens and a lower protective lens. The upper protective lens is located above the focusing lens, and the lower protective lens is located below the focusing lens.

[0009] An integrated circuit board is provided on the outer side of the cutting head housing;

[0010] The nozzle is connected to the air blowing connector, and a mass flow controller is connected to the air inlet of the air blowing connector.

[0011] Furthermore, the upper protective mirror includes a first protective mirror and a second protective mirror, and the lower protective mirror includes a first protective mirror and a second protective mirror.

[0012] Furthermore, the first protective mirror includes a first protective lens, and a first protective mirror frame is provided outside the first protective lens. A rotating mechanism is provided on the right side of the first protective mirror frame. The rotating mechanism includes a rotating shaft, which is connected to the first protective mirror frame. One end of the rotating shaft is connected to a motor, and the other end is connected to the cutting head housing.

[0013] Furthermore, the second protective mirror includes a second protective lens, and a second protective mirror frame is provided outside the second protective lens. A second rotating mechanism is provided on the right side of the second protective mirror frame. The rotating mechanism includes a second rotating shaft, which is connected to the second protective mirror frame. One end of the second rotating shaft is connected to a second motor, and the other end is connected to the outer shell of the cutting head.

[0014] Furthermore, the first protective mirror and the second protective mirror are arranged at different angles inside the cutting head housing.

[0015] Furthermore, the integrated circuit board includes a threshold judgment component, a signal receiving component, and a signal processing module.

[0016] Furthermore, the cutting head housing also includes a limit sensor and an optical sensor. The limit sensor is installed on the side of the first protective mirror and the second protective mirror near the cutting head housing, respectively, and the optical sensor is installed on the side of the protective mirror.

[0017] Furthermore, the mass flow controller includes an electromagnetic regulating valve and a pipeline interface, the pipeline interface being connected to a connector, and the pipeline interface being connected to an air blowing connector via the connector.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The system employs a dual-protection-lens design and uses optical sensors to monitor the light transmittance of the protective lenses. This allows for timely replacement of the damaged first protective lens with the backup second protective lens, ensuring the light transmittance of the lenses and the accuracy of the laser beam focusing, thus guaranteeing that the cutting precision is not affected.

[0020] In addition, by connecting a mass flow controller to the air blowing connector, the flow rate and pressure of the gas ejected from the nozzle can be effectively adjusted, enabling flexible handling of metal cutting of different thicknesses and materials.

[0021] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2This is a side view of the present invention.

[0024] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the protective mirror structure of this utility model;

[0026] Figure 5 This is a partial structural diagram of area A of this utility model;

[0027] Figure 6 This is a schematic diagram of the integrated circuit board structure of this utility model.

[0028] The attached figures are labeled as follows: 1. Cutting head housing; 11. Limit sensor; 12. Optical sensor; 13. Fiber optic connector; 2. Nozzle; 3. Air blowing connector; 31. Connector; 4. Mass flow controller; 41. Electromagnetic regulating valve; 42. Pipe interface; 5. Protective lens; 51. Upper protective lens; 52. Lower protective lens; 53. Protective lens cover; 6. Focusing lens; 61. Focusing lens protective cover; 7. Integrated circuit board; 71. Threshold judgment component; 72. Signal receiving component; 73. Signal processing module; 8. First protective lens; 81. First protective lens frame; 82. First protective lens; 83. Motor one; 84. Rotating shaft one; 9. Second protective lens; 91. Second protective lens frame; 92. Second protective lens; 93. Motor two; 94. Rotating shaft two. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive. Example

[0030] like Figure 1-6 As shown, a cutting head structure of a CNC fiber laser metal cutting machine includes a cutting head shell 1, a nozzle 2, and a fiber optic connector 13. The top of the cutting head shell 1 is connected to the fiber optic connector 13, and the bottom is connected to the nozzle 2. A focusing lens 6 and a protective lens 5 are provided inside the cutting head shell 1. A focusing lens protective cover 61 is provided on the outside of the focusing lens 6 to protect the focusing lens 6, and a protective lens cover 53 is provided on the outside of the protective lens 5 to protect the protective lens 5. The protective lens 5 provided above the focusing lens 6 is called the upper protective lens 51, and the protective lens provided below the focusing lens 6 is called the lower protective lens 52. Both the upper protective lens 51 and the lower protective lens 52 are double protective lenses 5. The so-called double protective lens 5 means that both the upper protective lens 51 and the lower protective lens 52 include a first protective lens 8 and a second protective lens 9.

[0031] The first protective mirror 8 includes a first protective lens 82, and a first protective mirror frame 81 is provided on the outside of the first protective lens 82. A rotating mechanism is provided on the right side of the first protective mirror frame 81. The rotating mechanism includes a rotating shaft 84, which is connected to the first protective mirror frame 81. One end of the rotating shaft 84 is connected to a motor 83, and the other end is rotatably connected to the cutting head housing 1. When the motor 83 rotates, it drives the rotating shaft 84 to rotate, and the first protective mirror frame 81 and the first protective lens 82 rotate simultaneously. The second protective mirror 9 includes a second protective lens 92, and a second protective mirror frame 91 is provided on the outside of the second protective lens 92. A second rotating mechanism is provided on the right side of 91. The rotating mechanism includes a second rotating shaft 94, which is connected to the second protective lens frame 91. One end of the second rotating shaft 94 is connected to a second motor 93, and the other end is rotatably connected to the cutting head housing 1. Similarly, the second protective lens frame 91 and the second protective lens 92 are rotated at the same time as the second rotating shaft 94 is rotated by the rotation of the second motor 93. In addition, the first protective lens 8 and the second protective lens 9 are arranged at different angles inside the cutting head housing 1. The first protective lens 8 is arranged horizontally inside the cutting head housing 1 as the main protective lens 5, while the second protective lens 9 is set at a certain angle to the first protective lens 8 on the inner side of the cutting head housing 1.

[0032] It should be noted that in this embodiment, when rotation is required, motor 1 83 and motor 2 84 do not rotate simultaneously. When motor 1 83 rotates the first protective mirror 8 to the designated position, motor 2 84 drives the second protective mirror 9 to start rotating.

[0033] like Figure 2 , 3 As shown in Figures 4 and 6, an integrated circuit board 7 is installed on the outside of the cutting head housing 1. A threshold judgment circuit 71 is set on the integrated circuit board 7. A limit sensor 11 and an optical sensor 12 are set inside the cutting head housing 1. The limit sensor 11 is installed on the side of the first protective mirror 8 and the second protective mirror 9 near the cutting head housing 1. The limit sensor 11 is used to detect whether the first protective mirror 8 and the second protective mirror 9 are rotated to the designated position by the first motor 83 and the second motor 84. The optical sensor 12 is installed on the side of the protective mirror 5. It is used to monitor whether the first protective mirror 82 is damaged. When the first protective mirror 82 is damaged, the integrated circuit board 7 can promptly determine whether the protective mirror is damaged and perform a switching operation. If a switching operation is required, the first motor 83 is run to rotate the first protective mirror 82. When the limit sensor 11 detects that the first protective mirror 82 has been rotated to the correct position, the second motor 93 starts to drive the second protective mirror 9 to rotate and replace the first protective mirror 8.

[0034] It should be noted that in this embodiment, the integrated circuit board 7 is an electronic component that integrates a large number of electronic components on a small substrate. The limit sensor 11 is mainly used to detect whether the position or movement range of an object has reached the limit. It can be divided into mechanical, electromagnetic, and photoelectric types. Due to the accuracy requirements, electromagnetic and photoelectric types can be selected to accurately control the movement range of the first protective mirror 8 and the second protective mirror 9. The optical sensor 12 is a sensor that measures based on optical principles. During the switching process between the first protective mirror 8 and the second protective mirror 9, the optical sensor 12 is responsible for detecting the light transmittance of the first protective mirror 8. When the light transmittance decreases, it sends an electrical signal to the integrated circuit board 7. The signal on the integrated circuit board 7... The receiving component 72 receives electrical signals from the optical sensor 12, processes them through the internal signal processing module 73, and compares them with the threshold judgment component 71 to determine whether the damage level of the protective mirror reaches the standard that requires switching. Moreover, the integrated circuit board 7 can also implement control logic. When it is determined that the protective mirror 5 needs to be switched, it can generate and send control signals to motor 1 83 and motor 2 93 to drive the switching operation between the first protective mirror 8 and the second protective mirror 9. The limit sensor 11 can be used to monitor the position of the protective mirror 5 during switching to ensure that the first protective mirror 8 and the second protective mirror 9 can be accurately positioned during the switching process. This technology can be implemented by setting conventional technical means and will not be described in detail here.

[0035] like Figure 1 , 3 As shown in Figure 5, the side of the cutting head housing 1 is equipped with an air blowing connector 3. The nozzle 2 is connected to the air blowing connector 3. A mass flow controller 4 is connected to the air inlet of the air blowing connector 3. The mass flow controller 4 includes an electromagnetic regulating valve 41 and a pipe interface 42. A connector 31 is connected to the pipe interface 42. The pipe interface 42 is connected to the air blowing connector 3 via the connector 31. The connector 31 can be a compression fitting. This connection method is simple and reliable, and can ensure good sealing performance to prevent gas leakage. After ensuring the reliability of the connection, the gas flow of the mass flow controller 4 can be adjusted by changing the opening of the electromagnetic regulating valve 41. This allows for precise control of the gas flow and pressure ejected from the nozzle 2.

[0036] It should be noted that in this embodiment, the mass flow controller 4 is a device for precisely controlling the gas flow rate. It is primarily based on the principle of thermal mass flow measurement. When gas flows through the heating element in the sensor, it carries away heat. The gas flow rate is measured based on a specific relationship between heat loss and mass flow rate. By installing the mass flow controller 4 at the air inlet 3, and through its built-in control algorithm and high-precision valve system, the gas flow rate entering the nozzle 2 can be precisely controlled. Changes in gas flow rate indirectly affect the pressure distribution. According to Bernoulli's equation in fluid mechanics, there is a correlation between flow velocity and pressure inside the nozzle 2. When the mass flow controller 4 adjusts the gas flow rate, the gas velocity inside the nozzle 2 changes, thereby causing a change in the pressure distribution.

[0037] The specific operation method of this utility model is as follows:

[0038] Before cutting begins, the fiber optic connector 13 is first connected to the CNC fiber laser metal cutting machine. The operator sets the mass flow controller 4 to control the airflow and pressure according to the material and thickness of the metal to be cut, and then the cutting work is carried out. During the process, the optical sensor 12 monitors the first protective lens 82 in real time. When the first protective lens 8 is detected to be damaged or contaminated, resulting in a decrease in light transmittance and affecting focusing, an electrical signal is transmitted to the integrated circuit board 7. The signal receiving component 72 on the integrated circuit board 7 receives the electrical signal from the optical sensor 12, processes it through the internal signal processing module 73, and compares it with the threshold judgment component 71 to determine whether the degree of damage to the protective lens reaches the standard for switching. When it is determined that switching is required, the integrated circuit board 7 generates and sends control signals to motor 1 83 and motor 2 93 to drive the switching operation between the first protective lens 8 and the second protective lens 9. The position of the protective lens 5 during switching is monitored by the limit sensor 11 to ensure that the first protective lens 8 and the second protective lens 9 can be accurately positioned during the switching process.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting head structure for a CNC fiber laser metal cutting machine, comprising a cutting head housing (1), a nozzle (2), and a fiber optic connector (13), wherein the top of the cutting head housing (1) is connected to the fiber optic connector (13), the bottom of the cutting head housing (1) is connected to the nozzle (2), a focusing lens (6) and a protective lens (5) are provided inside the cutting head housing (1), the focusing lens (6) is provided with a focusing lens protective cover (61), the protective lens (5) is provided with a protective lens cover (53), and an air blowing connector (3) is installed on the side of the cutting head housing (1), characterized in that: The focusing lens (6) is provided with double protective lenses (5) on both the top and bottom. The protective lenses (5) include an upper protective lens (51) and a lower protective lens (52). The upper protective lens (51) is located above the focusing lens (6), and the lower protective lens (52) is located below the focusing lens (6). An integrated circuit board (7) is provided on the outside of the cutting head shell (1); The nozzle (2) is connected to the air blowing connector (3), and a mass flow controller (4) is connected to the air inlet of the air blowing connector (3).

2. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 1, characterized in that: The upper protective mirror (51) includes a first protective mirror (8) and a second protective mirror (9), and the lower protective mirror (52) includes a first protective mirror (8) and a second protective mirror (9).

3. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 2, characterized in that: The first protective mirror (8) includes a first protective lens (82), and a first protective mirror frame (81) is provided outside the first protective lens (82). A rotating mechanism is provided on the right side of the first protective mirror frame (81). The rotating mechanism includes a rotating shaft (84). The rotating shaft (84) is connected to the first protective mirror frame (81). One end of the rotating shaft (84) is connected to a motor (83), and the other end is connected to the cutting head housing (1).

4. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 2, characterized in that: The second protective lens (9) includes a second protective lens (92), and a second protective lens frame (91) is provided outside the second protective lens (92). A rotating mechanism is provided on the right side of the second protective lens frame (91). The rotating mechanism includes a rotating shaft (94). The rotating shaft (94) is connected to the second protective lens frame (91). One end of the rotating shaft (94) is connected to a motor (93), and the other end is connected to the cutting head housing (1).

5. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 2, characterized in that: The first protective mirror (8) and the second protective mirror (9) are arranged at different angles inside the cutting head housing (1).

6. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 1, characterized in that: The integrated circuit board (7) includes a threshold judgment component (71), a signal receiving component (72), and a signal processing module (73).

7. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 1, characterized in that: The cutting head housing (1) also includes a limit sensor (11) and an optical sensor (12). The limit sensor (11) is installed on the side of the first protective mirror (8) and the second protective mirror (9) near the cutting head housing (1), respectively. The optical sensor (12) is installed on the side of the protective mirror (5).

8. The cutting head structure of a CNC fiber laser metal cutting machine according to claim 1, characterized in that: The mass flow controller (4) includes an electromagnetic regulating valve (41) and a pipe interface (42). A connector (31) is connected to the pipe interface (42), and the pipe interface (42) is connected to the air blowing connector (3) via the connector (31).

Images