Gas homogenizing device

Abstract

The utility model relates to a gas homogenizing device which comprises a fixing piece, a protective glass assembly is installed on the fixing piece, the protective glass assembly is pressed and fixed through a pressing plate, and a main gas channel and branch gas channels are formed in the fixing piece; a plurality of gas homogenizing pieces are arranged between the protective glass assembly and the fixing piece, and the gas homogenizing pieces are used for homogenizing cutting gas entering the fixing piece. According to the gas homogenizing device, high-pressure gas can be homogenized and dispersed, and the influence of turbulent flow, normal shock waves and the like on the laser cutting quality and efficiency is reduced.

Description

Technical Field

[0001] This application relates to the technical field of laser cutting, and more particularly, to a gas homogenizing device. Background Art

[0002] The laser cutting process involves irradiating a laser onto the surface of the material to be processed. The high laser energy causes the material to be processed to instantaneously melt or vaporize, and then the molten or vaporized material is blown away by a coaxial high-pressure cutting gas, thereby achieving the cutting process of the material.

[0003] In the prior art, the gas does not undergo gas homogenization when passing through the protective mirror. Especially when it is a high-pressure gas, phenomena such as turbulent flow and normal shock waves will occur, resulting in problems such as poor cutting, inconsistent cutting surface quality, burrs, and cutting slag, seriously affecting the cutting quality and cutting efficiency.

[0004] Therefore, it is necessary to provide a gas homogenizing device to ensure that the gas is evenly transported to the protective mirror part, improving the cutting quality and cutting efficiency. Utility Model Content

[0005] The purpose of this application is to provide a gas homogenizing device that can achieve the homogenization and dispersion of high-pressure gas, reducing the impact of turbulent flow and normal shock waves on the laser cutting quality and efficiency.

[0006] To achieve the above purpose, the present utility model provides a gas homogenizing device, including: a fixing member, on which a protective mirror assembly is installed, the protective mirror assembly is fixed by pressing with a pressing plate, and a main air passage and a branch air passage are arranged inside the fixing member;

[0007] A plurality of gas homogenizing members are arranged between the protective mirror assembly and the fixing member, and the gas homogenizing members are used for homogenizing the cutting gas entering the fixing member.

[0008] In an alternative embodiment, a gas connector is connected to the side wall of the fixing member, and the gas connector is communicated with the cavity of the main air passage;

[0009] The gas homogenizing member includes a first homogenizing member installed at the bottom of the fixing member, the first homogenizing member includes a connecting base and a homogenizing member column, and the branch air passage is tangent to the outer side wall of the homogenizing member column.

[0010] In an alternative embodiment, the interior of the fixing member includes a hollow cavity, the first homogenizing member is installed in the hollow cavity, a first annular cavity is left between the homogenizing member column and the cavity wall of the hollow cavity, and the first annular cavity is communicated with the space of the branch air passage.

[0011] In an alternative embodiment, a positioning disc is connected to the top of the homogenizing member column. A plurality of air inlet holes are evenly distributed in the circumferential direction of the positioning disc, and the air inlet holes communicate with the space of the first annular cavity.

[0012] In an alternative embodiment, a second homogenizing member is arranged between the first homogenizing member and the protective mirror assembly. An air inlet annular groove is formed in the bottom wall of the second homogenizing member, and the position of the air inlet annular groove is opposite to that of the air inlet holes.

[0013] In an alternative embodiment, the first homogenizing member includes an axially penetrating air outlet channel, the air outlet channel is arranged on the radially inner side of the first homogenizing member, and an air inlet notch groove is arranged at the top of the first homogenizing member, and the air inlet notch groove protrudes from the positioning disc.

[0014] In an alternative embodiment, the air inlet notch groove includes air inlet notches surrounding its circumferential direction, and the air inlet notches communicate with the space of the air outlet channel and the air inlet annular groove respectively.

[0015] In an alternative embodiment, a plurality of disassembly and assembly holes are arranged on the bottom wall of the connection base, and the first homogenizing member is connected to the fixing member through fastening screws connected in the disassembly and assembly holes;

[0016] A homogenizing member sinking groove for accommodating the connection base is formed on the fixing member, the homogenizing member sinking groove is arranged at the bottom of the hollow cavity, and a first sealing ring is arranged at the joint part between the connection base and the homogenizing member sinking groove;

[0017] A second sealing ring is arranged at the joint part between the second homogenizing member and the fixing member.

[0018] In an alternative embodiment, the protective mirror assembly is detachably installed on the fixing member, and includes a protective mirror, a protective mirror fixing member and a protective mirror cover plate. The protective mirror is press-fitted between the protective mirror cover plate and the protective mirror fixing member, and a pressure-resistant braking sealing ring is arranged at the bottom of the protective mirror fixing member.

[0019] In an alternative embodiment, the pressing plate is connected to the top of the fixing member through a connecting screw, and a sealing strip is arranged at the joint part between the fixing member and the pressing plate.

[0020] Through the gas homogenizing device in the present application, the high-pressure cutting gas entering the laser cutting device can be homogenized and dispersed, so that the homogenized and dispersed cutting gas is evenly transported to the protective mirror part to improve the cutting quality and cutting efficiency.

[0021] Other features and advantages of the present application will be described in detail in the subsequent specific embodiment part. Brief Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the split structure of the gas homogenization device in the present application;

[0024] Figure 2 Schematic diagram of the internal structure of the gas homogenization device in the present application;

[0025] Figure 3 Schematic diagram of the structure of the main air duct and branch air ducts in the present application;

[0026] Figure 4 Schematic diagram of the structure of the protective mirror assembly in the present application;

[0027] Figure 5 Schematic cross-sectional view of the first homogenizing member in the present application;

[0028] Figure 6 Schematic top view of the first homogenizing member in the present application.

[0029] Icon:

[0030] 101 - Connecting screw; 102 - Pressing plate; 103 - Sealing strip; 104 - Second homogenizing member; 105 - First sealing ring; 106 - Fixing member; 107 - Second sealing ring; 108 - Gas joint; 109 - Sealed plug.

[0031] 200 - Protective mirror assembly; 201 - Protective mirror cover plate; 202 - Protective mirror; 203 - Protective mirror fixing member; 204 - Pressure-resistant braking sealing ring; 205 - Sealing frame.

[0032] 300 - First homogenizing member; 301 - Disassembly and installation hole; 302 - Sealing groove; 303 - First annular cavity; 304 - Air inlet hole; 305 - Air inlet notch groove; 306 - Air outlet channel; 307 - Air inlet annular groove.

[0033] 401 - Main air duct; 402 - First branch air duct; 403 - Second branch air duct. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. The components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "inside" and "outside" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0037] The gas homogenization device in this application is mainly used for the homogenization and dispersion of the cutting gas at the position of the protective mirror 202 in the laser cutting process. Specifically, in the form of arranging an air inlet assembly, combined with a plurality of gas homogenization parts arranged inside the fixing part 106, the cutting gas during the conveying process into the fixing part 106 is homogenized.

[0038] See Figure 1 and in combination with Figures 2 - 6 In the gas homogenization device of the present utility model, the main structure includes a fixing part 106. A protective mirror assembly 200 is installed on the fixing part 106. The protective mirror assembly 200 is pressed and fixed on the fixing part 106 through a pressing plate 102, thereby ensuring the reliable installation of the protective mirror assembly 200.

[0039] A main air duct 401 and branch air ducts are arranged inside the fixing part 106. The cutting gas enters the fixing part 106 through the main air duct 401 and is evenly conveyed through the branch air ducts.

[0040] A plurality of gas homogenizing members are provided between the protective mirror assembly 200 and the fixing member 106 to homogenize the cutting gas after evenly distributing and conveying it inside the fixing member 106, so that the cutting gas reaching the protective mirror assembly 200 can evenly purge the melted or vaporized material, thereby improving the flow state of the existing cutting gas and avoiding the influence of turbulence, normal shock waves, etc. on the cutting quality and cutting efficiency.

[0041] In one specific embodiment, from the perspective of the gas entering the fixing member 106, a gas connector 108 is connected to the side wall of the fixing member 106. In order to enable the cutting gas to enter the fixing member 106, the cavity of the main air passage 401 inside the fixing member 106 communicates with the gas connector 108.

[0042] The sub-air passage in the present utility model is a branch structure of the main air passage 401, including a first sub-air passage 402 and a second sub-air passage 403. During the process of the cutting gas entering the sub-air passage from the main air passage 401, the cutting gas is evenly divided into two paths and undergoes the first homogenization and dispersion in the form of evenly distributing and conveying. The cutting gas after evenly distributing and conveying further passes through a plurality of gas homogenizing members and continues to be homogenized and dispersed during the process of flowing downstream. At the end of the sub-air passage on the fixing member 106, it is blocked by a sealing plug 109 to ensure the airtightness of the internal space.

[0043] Specifically, the gas homogenizing member includes a first homogenizing member 300 installed at the bottom of the fixing member 106. The first homogenizing member 300 serves as the main body of the homogenizing structure, is installed inside the fixing member 106, and is installed at the bottom of the fixing member 106 from bottom to top.

[0044] Furthermore, the first homogenizing member 300 includes a connecting base and a homogenizing member column. The sub-air passage is tangent to the outer side wall of the homogenizing member column, enabling the cutting gas after evenly distributing and conveying to enter the downstream homogenizing structure in a tangent form.

[0045] The fixing member 106 is specifically a hollow structure, and a hollow cavity for installing the first homogenizing member 300 is provided inside the fixing member 106.

[0046] A first annular cavity 303 is left between the homogenizing member column and the cavity wall of the hollow cavity. The first annular cavity 303 communicates with the space of the sub-air passage. The sub-air passage being tangent to the outer side wall of the homogenizing member column is essentially that the cavity of the sub-air passage is tangent to the first annular cavity 303, and the cutting gas undergoes the second homogenization and dispersion during the process of entering the first annular cavity 303 from the sub-air passage.

[0047] A positioning disc is connected to the top of the homogenizing member column. The positioning disc is specifically arranged at the top of the first homogenizing member 300 and above the first annular cavity 303. A plurality of air inlet holes 304 are evenly distributed in the circumferential direction of the positioning disc. Combining that the space of the air inlet holes 304 communicates with the first annular cavity 303, when the cutting gas in the first annular cavity 303 passes through the plurality of evenly distributed air inlet holes 304, the third homogenizing dispersion can be carried out.

[0048] In another specific embodiment, a second homogenizing member 104 is arranged between the first homogenizing member 300 and the protective mirror assembly 200. An air inlet annular groove 307 is formed on the bottom wall of the second homogenizing member 104, and the position of the air inlet annular groove 307 is opposite to that of the air inlet holes 304.

[0049] Furthermore, the second homogenizing member 104 is installed on the radial outer side of the first homogenizing member 300 and is in fit with the groove surface inside the fixing member 106. The purpose of setting the second homogenizing member 104 is mainly for further gas homogenization. By arranging the second homogenizing member 104 between the first homogenizing member 300 and the protective mirror assembly 200, the cutting gas can be homogenized at the combined part of the two. The air inlet annular groove 307 is mainly an annular cavity structure composed of the first homogenizing member 300, the second homogenizing member 104 and necessary sealing structures, so that the cutting gas is subjected to the fourth homogenizing dispersion at the air inlet annular groove 307 part.

[0050] In order to ensure the effective flow of the cutting gas, the first homogenizing member 300 includes an axially penetrating air outlet channel 306, and the cutting gas is discharged from the inside of the fixing member 106 through the air outlet channel 306 after passing through the protective mirror assembly 200.

[0051] Furthermore, the air outlet channel 306 is arranged on the radial inner side of the first homogenizing member 300 and includes a through hollow channel. An air inlet notch groove 305 is arranged at the top of the first homogenizing member 300, and the air inlet notch groove 305 protrudes above the positioning disc. Through this setting method, the cutting gas after the fourth homogenizing dispersion can be transported to the air inlet notch groove 305 part, and after the fifth homogenizing dispersion through the air inlet structure of the air inlet notch groove 305, it is evenly blown to the protective mirror 202, thus realizing the five - time homogenization of the cutting gas in the process of being transported from the fixing member 106 to the protective mirror assembly 200.

[0052] Based on the above - mentioned air inlet notch groove 305 including an air inlet structure, the air inlet notch groove 305 includes air inlets surrounding the circumference of the air inlet notch groove 305 itself. The air inlets are evenly arranged and are respectively in spatial communication with the air outlet channel 306 and the air inlet annular groove 307, so that the cutting gas after the fourth homogenizing dispersion can reach the protective mirror 202 part through the air inlets and blow the protective mirror 202.

[0053] The space where the air inlet gap is combined with the air outlet channel 306 is communicated, so that after the protective mirror 202 is evenly purged, the gas can be evenly discharged from the fixing member 106 through the air outlet channel 306.

[0054] From the perspective of assembly, a plurality of disassembly holes 301 are provided on the bottom wall of the connecting base. The first homogenizing member 300 is connected to the fixing member 106 as an integral structure through fastening screws connected in the disassembly holes 301, ensuring the stable and reliable installation of the first homogenizing member 300 inside the fixing member 106.

[0055] A homogenizing member sinking groove for accommodating the connecting base is provided on the fixing member 106. The homogenizing member sinking groove is arranged at the bottom of the hollow cavity, enabling the connecting base of the first homogenizing member 300 to be completely fitted into the homogenizing member sinking groove. In order to enhance the sealing performance, a first sealing ring 105 is provided at the joint between the connecting base and the homogenizing member sinking groove, and a sealing groove 302 for installing the first sealing ring 105 is provided on the connecting base, ensuring the effective and reliable sealing of the first annular cavity 303.

[0056] A second sealing ring 107 is provided at the joint between the second homogenizing member 104 and the fixing member 106, ensuring the effective and reliable sealing of the air inlet annular groove 307 between the first homogenizing member 300 and the second homogenizing member 104.

[0057] In order to save space and facilitate installation, the overall protective mirror assembly 200 adopts a drawer form. The protective mirror assembly 200 is slidably installed on the fixing member 106. Specifically, the protective mirror assembly 200 includes a protective mirror 202, a protective mirror fixing member 203, and a protective mirror cover plate 201. The protective mirror fixing member 203 is the main frame of the drawer. The protective mirror 202 is press-fitted between the protective mirror cover plate 201 and the protective mirror fixing member 203, and a pressure-resistant braking sealing ring 204 is provided at the bottom of the protective mirror fixing member 203.

[0058] Furthermore, the overall protective mirror assembly 200 is fixed on the fixing member 106 through installation screws and is sealed with the fixing member 106 through a sealing frame 205. The material of the sealing frame 205 is PVC material, with single-sided adhesive, and is adhered to the fixing member 106 of the protective mirror 202.

[0059] The pressure-resistant braking sealing ring 204 includes a lip-shaped plastic part and springs evenly distributed inside the lip-shaped plastic part. When no gas is connected, it presents a normal state. When gas is introduced, the gas enters the lip position and starts to inflate. The springs open outwards under the gas pressure, and the entire pressure-resistant braking sealing ring 204 expands after the gas enters, thereby achieving the purpose of sealing protection.

[0060] The pressing plate 102 is connected to the top of the fixing member 106 through connecting screws 101, and a sealing strip 103 is provided at the joint between the fixing member 106 and the pressing plate 102.

[0061] During the assembly process, first place the second sealing ring 107 and the second homogenizing member 104 into the card slot in the fixing member 106, then install the sealing strip 103, cover the pressing plate 102, and install the pressing plate 102 and the fixing member 106 together through the connecting screw 101. Then insert the mirror assembly to fix the entire assembly.

[0062] Through the gas homogenizing device in the present utility model, the homogenization of the cutting gas can be achieved to the greatest extent, so as to achieve the technical purposes of high efficiency and good quality in cutting, welding and edge sealing.

[0063] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0064] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas homogenization device, characterized in that, Comprising: A fixing member, on which a protective mirror assembly is installed. The protective mirror assembly is fixedly pressed by a pressing plate. A main air passage and branch air passages are arranged inside the fixing member; A plurality of gas homogenizing members are arranged between the protective mirror assembly and the fixing member. The gas homogenizing members are used for homogenizing the cutting gas entering the fixing member.

2. The gas homogenization device according to claim 1, characterized in that, A gas connector is connected to the side wall of the fixing member, and the gas connector communicates with the cavity of the main air passage; The gas homogenizing member includes a first homogenizing member installed at the bottom of the fixing member. The first homogenizing member includes a connecting base and a homogenizing member column. The branch air passage is tangent to the outer side wall of the homogenizing member column.

3. The gas homogenization device according to claim 2, characterized in that, The inside of the fixing member includes a hollow cavity. The first homogenizing member is installed in the hollow cavity. A first annular cavity is left between the homogenizing member column and the cavity wall of the hollow cavity. The first annular cavity communicates with the space of the branch air passage.

4. The gas homogenizing device according to claim 3, characterized in that, A positioning disc is connected to the top of the homogenizing member column. A plurality of air inlet holes are evenly distributed in the circumferential direction of the positioning disc. The air inlet holes communicate with the space of the first annular cavity.

5. The gas homogenizing device according to claim 4, characterized in that, A second homogenizing member is arranged between the first homogenizing member and the protective mirror assembly. An air inlet ring groove is formed on the bottom wall of the second homogenizing member, and the air inlet ring groove is opposite to the position of the air inlet hole.

6. The gas homogenization device according to claim 5, characterized in that The first homogenizing member includes an axially penetrating air outlet passage. The air outlet passage is arranged on the radially inner side of the first homogenizing member, and an air inlet notch groove is arranged at the top of the first homogenizing member. The air inlet notch groove protrudes from the positioning disc.

7. The gas homogenization device according to claim 6, wherein, The air inlet notch groove includes air inlet notches surrounding its circumferential direction. The air inlet notches communicate with the spaces of the air outlet passage and the air inlet ring groove respectively.

8. The gas homogenization device according to claim 6, characterized in that, A plurality of disassembly and assembly holes are arranged on the bottom wall of the connecting base. The first homogenizing member is connected to the fixing member by fastening screws connected to the disassembly and assembly holes; A homogenizing member sink for accommodating the connecting base is formed on the fixing member. The homogenizing member sink is arranged at the bottom of the hollow cavity. A first sealing ring is arranged at the joint between the connecting base and the homogenizing member sink; A second sealing ring is arranged at the joint between the second homogenizing member and the fixing member.

9. The gas homogenization device according to claim 1, characterized in that, The protective mirror assembly is detachably installed on the fixing member and includes a protective mirror, a protective mirror fixing member and a protective mirror cover plate. The protective mirror is pressed between the protective mirror cover plate and the protective mirror fixing member. A pressure-resistant braking sealing ring is arranged at the bottom of the protective mirror fixing member.

10. The gas homogenization device according to any one of claims 1-9, characterized in that, The pressing plate is connected to the top of the fixing member by connecting screws. A sealing strip is arranged at the joint between the fixing member and the pressing plate.

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