Quick nozzle replacement device for water-jet guided laser coupling

Abstract

The utility model belongs to the technical field of water guide processing, and relates to a quick nozzle replacing device for water guide laser coupling, which comprises a rotary chuck and a detachable clamping pressure plate, and the rotary chuck can rotate in a plane parallel to the upper surface of the detachable clamping pressure plate. A plurality of nozzle placing holes which are centrosymmetric and are uniformly distributed are formed in the rotary chuck, the nozzle placing holes are used for mounting nozzles, and the symmetric centers of the nozzle placing holes coincide with the rotary center; according to the utility model, the plurality of centrosymmetric nozzle placing holes are formed in the rotary chuck, and the nozzles are arranged in the nozzle placing holes, so that when the nozzles need to be replaced, the nozzles can be replaced only by rotating the rotary chuck to rotate new nozzles arranged in the other nozzle placing holes in place and positioning and fixing the new nozzles; therefore, during production and processing, the nozzle can be replaced simply, conveniently and quickly, and time and labor are saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water-guided machining, and relates to a quick-change nozzle device for water-guided laser coupling. Background Technique

[0002] The new look of water-guided laser machining technology meets the urgent needs of the high-precision and high-tech fields for the manufacturing of precision parts, providing an innovative and efficient solution for them. Traditional laser machining has problems such as large heat-affected areas and high surface roughness. However, water-guided laser machining can effectively overcome these limitations by introducing water as a guiding medium. Water-guided laser machining technology is an advanced machining method based on the principle of total internal reflection. In this process, the laser beam is completely wrapped in the water jet, and through total internal reflection at the interface between air and water, the laser beam is propagated from the water jet beam to the workpiece surface. The uniqueness of this technology lies in making full use of the cooling property of water, which can be used to cool the cutting area simultaneously and wash away the debris generated by laser ablation in a timely manner. Compared with traditional laser machining technology, water-guided laser machining significantly reduces the heat-affected zone, greatly reduces problems such as thermally induced microcracks, thermal deformation, and residual slag on the cross section, and at the same time has less heat accumulation and burrs, making the surface of the machining area smoother.

[0003] The basic principle of water-guided laser machining is that the laser beam enters the water jet beam through total reflection, and a stable water jet beam is the basis for improving the machining depth and accuracy. The current research difficulties focus on how to further improve the coupling device to enhance the stable flow state of the water jet. When implementing water-guided laser machining technology, only by ensuring the stability of the water beam can the technical requirements for efficiently coupling water and laser be met. Therefore, the nozzle of the coupling device in water-guided laser machining is particularly important. Since the nozzle has a direct impact on the quality of water-guided laser machining, the aperture accuracy requirements of the nozzle are relatively high. Usually, when the nozzle has been used for a period of time or a certain number of parts have been machined, it needs to be replaced in a timely manner.

[0004] However, in the existing water-guided laser machining, the way to replace the nozzle is to remove the detachable clamping plate from the counterbore of the coupling device, and then use a special tooling to remove the nozzle from the nozzle placement hole of the detachable clamping plate and replace it with a new nozzle. Finally, the detachable clamping plate is reinstalled back into the coupling device. The entire process requires the water-guided laser machining equipment to be stopped for a long time, which is time-consuming, laborious and inefficient, greatly affecting the machining process and machining efficiency of water-guided laser. Moreover, when a workpiece to be machined requires multiple water-guided laser cutting processes to cooperate and different types of nozzles need to be replaced, the replacement method of the existing nozzle device also seriously affects the switching efficiency of different machining requirements.

[0005] Therefore, a nozzle device that can be quickly replaced or switched is needed to solve the above technical problems. Content of the Utility Model

[0006] The technical solution adopted by the present utility model to solve the technical problem is: a quick-change nozzle device for water-guided laser coupling, comprising: a rotary chuck and a detachable clamping pressing plate; the disk surface of the rotary chuck is arranged parallel to the plate surface of the detachable clamping pressing plate, the rotation center of the rotary chuck is rotationally connected to the detachable clamping pressing plate, the rotary chuck can rotate in a plane parallel to the upper surface of the detachable clamping pressing plate, and the detachable clamping pressing plate is used to connect the water-guided laser coupling device;

[0007] The rotary chuck is provided with 2 to 12 nozzle placement holes that are centrosymmetrically and evenly distributed, the nozzle placement holes are used to install nozzles, and the symmetric center of the nozzle placement holes coincides with the rotation center;

[0008] The detachable clamping pressing plate is provided with a positioning cover plate, the positioning cover plate is detachably connected to the detachable clamping pressing plate, the positioning cover plate and the detachable clamping pressing plate clamp the rotary chuck therebetween, and a locking device is arranged between the positioning cover plate and the detachable clamping pressing plate; when the locking device is locked, the rotary chuck is clamped and cannot rotate; when the locking device is opened, the rotary chuck can rotate around the rotation center; the locking device includes: a bolt thread, or a buckle, or a locking cylinder.

[0009] Preferably, the rotary chuck is provided with 2n nozzle placement holes, where n ranges from 1 to 6.

[0010] More preferably, the positioning cover plate is provided with a positioning hole, and the aperture of the positioning hole is larger than the aperture of the nozzle placement hole; when the locking device is locked, the positioning hole covers the nozzle placement hole directly below the positioning cover plate, the positioning hole and the nozzle placement hole directly below the positioning cover plate are coaxial with the rotation axis, and the center of the nozzle placement hole directly below the positioning cover plate, the rotation axis of the rotation center, and the center of the nozzle placement hole being used for water-guided laser processing are located in the same vertical plane.

[0011] More preferably, the rotary chuck is provided with 6 nozzle placement holes.

[0012] Preferably, the side wall of the detachable clamping pressing plate is provided with a threaded hole, and the threaded hole is used for threaded connection with the water-guided laser coupling device.

[0013] The beneficial effects of the present utility model are:

[0014] By arranging a plurality of centrosymmetric nozzle placement holes on the rotary chuck and installing nozzles in the nozzle placement holes, when the nozzle needs to be replaced, only the rotary chuck needs to be rotated to rotate the new nozzle installed in the remaining nozzle placement holes into place and position and fix it, so that the nozzle replacement can be completed. Therefore, during production and processing, the nozzle replacement of the present utility model is simple, convenient, fast, time-saving and labor-saving. Description of the Drawings

[0015] Figure 1 It is the front view of a quick-change nozzle device for water-guided laser coupling of the present utility model;

[0016] Figure 2 It is the front cross-sectional view of the present utility model;

[0017] Figure 3 It is the right view of the present utility model.

[0018] Among them, 1. Rotary chuck; 2. Detachable clamping pressing plate; 3. Nozzle placement hole; 4. Rotation center; 5. Positioning cover plate; 6. Positioning hole; 7. Screw hole. Specific implementation mode

[0019] Next, the relevant technologies in the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Reference Figures 1 to 3 , the quick-change nozzle device for water-guided laser coupling of this implementation mode includes: a rotary chuck 1 and a detachable clamping pressing plate 2; the disk surface of the rotary chuck 1 is arranged parallel to the plate surface of the detachable clamping pressing plate 2, and the rotation center 4 of the rotary chuck 1 is rotationally connected to the detachable clamping pressing plate 2. The rotary chuck 1 can rotate within a plane parallel to the upper surface of the detachable clamping pressing plate 2, and the detachable clamping pressing plate 2 is used to connect the water-guided laser coupling device;

[0021] There are 2 to 12 centrally symmetric and evenly distributed nozzle placement holes 3 on the rotary chuck 1. The nozzle placement holes 3 are used to install nozzles, and the symmetry center of the nozzle placement holes 3 coincides with the rotation center 4; the rotary chuck 1 can place multiple intact nozzles through the nozzle placement holes 3. When it is found that the nozzle is damaged during water-guided laser processing, the rotary chuck 1 can be rotated to replace the intact nozzle; alternatively, multiple nozzles of different models can be placed in the nozzle placement holes 3 at different positions of the rotary chuck 1, and quick replacement can be carried out when different models of nozzles are required for processing the same part;

[0022] The detachable clamping pressure plate 2 is provided with a positioning cover plate 5. The positioning cover plate 5 is detachably connected to the detachable clamping pressure plate 2. The positioning cover plate 5 and the detachable clamping pressure plate 2 clamp the rotary chuck 1 up and down in the middle, and a locking device is arranged between the positioning cover plate 5 and the detachable clamping pressure plate 2. When the locking device is locked, the rotary chuck 1 is clamped and cannot rotate. When the locking device is opened, the rotary chuck 1 can rotate around the rotation center 4. The locking device includes: bolt thread, buckle, locking cylinder. Through the positioning cover plate 5, the rotary chuck 1 can be pressed tightly, so as to ensure the position accuracy of the nozzle placement hole 3, and make the nozzle placement hole 3 used for water jet guided laser machining match the position of the laser water jet.

[0023] Further, the rotary chuck 1 is provided with 2n nozzle placement holes 3, where n ranges from 1 to 6. The even number of nozzle placement holes 3 that are centrosymmetric makes the nozzle placement hole 3 used for water jet guided laser machining exactly symmetric and on the same straight line with the nozzle placement hole 3 directly below the positioning cover plate 5. Therefore, while facilitating the positioning of the positioning cover plate 5, the positioning pressure received by the nozzle placement hole 3 used for water jet guided laser machining is more uniform on both sides, avoiding affecting the machining accuracy of water jet guided laser due to uneven force.

[0024] Furthermore, the positioning cover plate 5 is provided with a positioning hole 6, and the aperture of the positioning hole 6 is larger than the aperture of the nozzle placement hole 3. When the locking device is locked, the positioning hole 6 covers the nozzle placement hole 3 directly below the positioning cover plate 5. The positioning hole 6 and the nozzle placement hole 3 directly below the positioning cover plate 5 have the same rotation axis. The center of the nozzle placement hole 3 directly below the positioning cover plate 5, the rotation axis of the rotation center 4, and the center of the nozzle placement hole 3 used for water jet guided laser machining are located in the same vertical plane. Through the nozzle placement hole 3 used for water jet guided laser machining and the nozzle placement hole 3 directly below the positioning cover plate 5 that are symmetric front and back, while the positioning cover plate 5 presses the rotary chuck 1 tightly, it can also accurately position the nozzle placement hole 3 used for water jet guided laser machining.

[0025] Furthermore, the rotary chuck 1 is provided with 6 nozzle placement holes 3. When there are 6 nozzle placement holes 3, the size of the rotary chuck 1 does not need to be too large, and the number of nozzles that can be installed is at a relatively high time - efficiency ratio.

[0026] Further, the side wall of the detachable clamping pressure plate 2 is provided with a screw hole 7, and the screw hole 7 is used for threaded connection with the water jet guided laser coupling device. The detachable clamping pressure plate 2 can be fixed on the coupling device through the screw hole 7 to ensure the fastening effect of the detachable clamping pressure plate 2, thereby ensuring the hole position accuracy of the nozzle placement hole 3.

[0027] In summary, in the present utility model, a plurality of nozzle placement holes that are centrosymmetric are provided on a rotary chuck, and nozzles are installed in the nozzle placement holes. When the nozzles need to be replaced, it is only necessary to rotate the rotary chuck to rotate the new nozzles installed in the remaining nozzle placement holes into place and position and fix them, thus completing the replacement of the nozzles. Therefore, during production and processing of the present utility model, the replacement of the nozzles is simple, convenient, fast, time-saving and labor-saving; thus, the present utility model has broad application prospects in a water-guided laser coupling device.

[0028] It should be emphasized that the above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A quick-change nozzle device for water-guided laser coupling, characterized in that, Comprising: A rotary chuck (1) and a detachable clamping pressing plate (2); the disk surface of the rotary chuck (1) is arranged parallel to the plate surface of the detachable clamping pressing plate (2), the rotation center (4) of the rotary chuck (1) is rotationally connected to the detachable clamping pressing plate (2), the rotary chuck (1) can rotate within a plane parallel to the upper surface of the detachable clamping pressing plate (2), and the detachable clamping pressing plate (2) is used for connecting a water-guided laser coupling device; The rotary chuck (1) is provided with 2 to 12 centrally symmetric and uniformly distributed nozzle placement holes (3), the nozzle placement holes (3) are used for installing nozzles, and the symmetry center of the nozzle placement holes (3) coincides with the rotation center (4); The detachable clamping pressing plate (2) is provided with a positioning cover plate (5), the positioning cover plate (5) is detachably connected to the detachable clamping pressing plate (2), the positioning cover plate (5) and the detachable clamping pressing plate (2) clamp the rotary chuck (1) up and down in the middle, and a locking device is arranged between the positioning cover plate (5) and the detachable clamping pressing plate (2); when the locking device is locked, the rotary chuck (1) is clamped and cannot rotate; when the locking device is opened, the rotary chuck (1) can rotate around the rotation center (4); the locking device includes: a bolt thread, or a snap fastener, or a locking cylinder.

2. The quick-change nozzle device for water-guided laser coupling according to claim 1, characterized in that, The rotary chuck (1) is provided with 2n nozzle placement holes (3), where n ranges from 1 to 6.

3. The quick-change nozzle device for water-guided laser coupling according to claim 2, characterized in that, The positioning cover plate (5) is provided with a positioning hole (6), and the aperture of the positioning hole (6) is larger than the aperture of the nozzle placement hole (3); when the locking device is locked, the positioning hole (6) covers the nozzle placement hole (3) directly below the positioning cover plate (5), the positioning hole (6) and the nozzle placement hole (3) directly below the positioning cover plate (5) share the same rotation axis, and the center of the nozzle placement hole (3) directly below the positioning cover plate (5), the rotation axis of the rotation center (4), and the center of the nozzle placement hole (3) being used for water-guided laser processing are located in the same vertical plane.

4. The rapid replacement nozzle device for water-guided laser coupling according to claim 2, characterized in that, The rotary chuck (1) is provided with 6 nozzle placement holes (3).

5. The quick-change nozzle device for water-guided laser coupling according to claim 1, characterized in that The side wall of the detachable clamping pressing plate (2) is provided with a screw hole (7), and the screw hole (7) is used for threaded connection with a water-guided laser coupling device.

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