Titanium alloy grating machining method based on water-guided laser

Abstract

The invention discloses a titanium alloy grating machining method based on water-jet guided laser. The titanium alloy grating machining method comprises the steps that a titanium alloy part to be machined is clamped and positioned; contour machining of middle grating holes is conducted on the titanium alloy to-be-machined part based on water-guided laser, and a middle part is obtained; machining of final grating holes is conducted on the middle part based on water-guided laser, and a primary titanium alloy grating is obtained; cleaning the surface of the primary titanium alloy grating to obtain a final titanium alloy grating; and detecting the grid holes of the final-grade titanium alloy grid. By means of the machining method, the machining efficiency and machining quality of the titanium alloy grating can be improved. In the machining process, the flowing state of water jet is changed, then the machining efficiency is improved, the machining time of a single grating hole is obviously shortened, a surface remelting layer of the titanium alloy grating can be eliminated through secondary machining, and the machining quality of the titanium alloy grating is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal grille processing, and particularly to a method for processing titanium alloy grilles based on water-jet guided laser. Background Technique

[0002] The titanium alloy grille combining titanium alloy material and grille structure can effectively exert the dual advantages of both in terms of materials and structure, and is widely used in the intake duct position of fighter jets. However, due to the characteristics of titanium alloy such as poor thermal conductivity, low elastic modulus, and strong affinity, it has become a difficult-to-process material. Moreover, the fillet radius of the grid hole corners is small, and high requirements are placed on machining accuracy and surface quality. Therefore, the manufacture of titanium alloy grilles requires the use of high-precision machining equipment and processes to ensure the accuracy and quality of the grilles, and there are still some inherent drawbacks in traditional machining methods that are difficult to solve in a short time.

[0003] In related technologies, due to the large number of grille holes, there are thousands or even tens of thousands of grille holes on a single grille part, and the existing water-jet guided laser machining methods are insufficient to meet the requirements of machining efficiency. On the other hand, titanium has strong activity and is prone to chemical reactions with elements such as oxygen at high temperatures. The existing water-jet guided laser machining of titanium alloy materials is prone to forming a remelted layer on the surface, which limits its practical application. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, a method for processing titanium alloy grilles based on water-jet guided laser provided by the present invention improves the machining efficiency of water-jet guided laser machining of titanium alloy grille holes through the titanium alloy grille machining method of the present application, and at the same time can effectively eliminate the remelted layer on the machining surface and improve the machining quality of the grille holes.

[0006] Specifically, the following technical solutions are included:

[0007] The present invention provides a method for processing titanium alloy grilles based on water-jet guided laser, and the titanium alloy grille machining method includes the following steps:

[0008] Clamp and position the titanium alloy part to be machined;

[0009] Based on the water-jet guided laser, machine the intermediate grille holes of the titanium alloy part to be machined to obtain an intermediate part;

[0010] Based on the water-jet guided laser, machine the final grille holes of the intermediate part to obtain a primary titanium alloy grille;

[0011] Clean the surface of the primary titanium alloy grille to obtain a final titanium alloy grille;

[0012] Inspect the grid holes of the ultimate titanium alloy grid.

[0013] Optionally, the clamping and positioning of the titanium alloy part to be processed includes:

[0014] Install the titanium alloy part to be processed on the tooling fixture and move it to the processing area of the water-guided laser;

[0015] Based on the contact probe of the water-guided laser, position the titanium alloy part to be processed in the processing coordinate system.

[0016] Optionally, the contour machining of the intermediate grid holes of the titanium alloy part to be processed based on the water-guided laser includes:

[0017] Set the machining program using the circumferential milling method, and set the scanning speed of the circumferential milling to periodic variable-speed scanning with three scanning speeds;

[0018] Load the path trajectory program and run the path trajectory program once without material.

[0019] Check whether the water jet covers the entire area of the titanium alloy part to be processed. If so, proceed to the next step; otherwise, re-clamp and position the titanium alloy part to be processed;

[0020] Run the machining program and the path trajectory program to obtain the intermediate part.

[0021] Optionally, in the circumferential milling method, the distance between the path trajectory of the intermediate grid holes and the contour of the ultimate grid holes is: half of the water beam diameter of the water jet plus 60 microns.

[0022] Optionally, the scanning parameters of the periodic variable-speed scanning are: 110 mm / min to 130 mm / min for the first circle, 80 mm / min to 100 mm / min for the second circle, and 140 mm / min to 160 mm / min for the third circle, and cycle periodically until the intermediate grid holes are formed.

[0023] Optionally, the machining of the ultimate grid holes on the intermediate part based on the water-guided laser includes:

[0024] Perform the first trimming trajectory machining on the intermediate grid holes to obtain the first grid holes;

[0025] Perform the second trimming trajectory machining on the first grid holes to obtain the second grid holes;

[0026] Perform the third trimming trajectory machining on the second grid holes to obtain the ultimate grid holes.

[0027] Optionally, the distance between the first trimming trajectory and the path trajectory of the intermediate grille holes is 30 μm, the distance between the second trimming trajectory and the first trimming trajectory is 20 μm, and the distance between the third trimming trajectory and the second trimming trajectory is 10 μm.

[0028] Optionally, the surface cleaning of the primary titanium alloy grille includes:

[0029] Remove the primary titanium alloy grille from the clamping and positioning for surface cleaning, and the surface cleaning includes cleaning the surface of the primary titanium alloy grille with a cotton yarn dipped in alcohol.

[0030] Optionally, the detection of the grille holes of the final titanium alloy grille includes:

[0031] Measure the size of the grille holes of the final titanium alloy grille with a vernier caliper;

[0032] Measure the surface roughness of the final titanium alloy grille with a white light interferometer;

[0033] Use a magnifying glass to detect whether there are cracks around the final grille holes.

[0034] Optionally, after the detection is completed, place the final titanium alloy grille in the corresponding packaging box, confirm that the part number of the final titanium alloy grille is consistent with the part number of the packaging box, and place the packaging box containing the final titanium alloy grille in a turnover box for unified storage.

[0035] The titanium alloy grille processing method provided by the embodiment of the present invention, wherein the titanium alloy grille processing method includes first clamping and positioning the titanium alloy part to be processed, then initially processing the contour of the grille holes of the titanium alloy part to be processed by water-guided laser, then performing final processing on the initially processed grille hole contour, and finally performing surface cleaning to obtain the final titanium alloy grille, and then detecting the final titanium alloy grille. Through such a processing method, the processing efficiency and processing quality of the titanium alloy grille can be improved. During the processing, the flow state of the water jet is changed, thereby improving the processing efficiency, significantly shortening the processing time of a single grille hole, and being able to eliminate the surface remelting layer of the titanium alloy grille through secondary processing, improving the processing quality of the titanium alloy grille.

[0036] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following specifically gives the specific implementation manners of this application. Description of the Drawings

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0038] Figure 1 FIG. is a flowchart of the steps of a titanium alloy grille processing method according to an embodiment of the present invention;

[0039] Figure 2 FIG. is a flowchart of the steps of the final grille hole processing according to an embodiment of the present invention;

[0040] Figure 3a FIG. is a schematic diagram of the first - circle processing of the path trajectory of the intermediate grille hole according to an embodiment of the present invention;

[0041] Figure 3b FIG. is a schematic diagram of the second - circle processing of the path trajectory of the intermediate grille hole according to an embodiment of the present invention;

[0042] Figure 3c FIG. is a schematic diagram of the third - circle processing of the path trajectory of the intermediate grille hole according to an embodiment of the present invention;

[0043] Figure 4 FIG. is a schematic diagram of the final grille hole processing according to an embodiment of the present invention;

[0044] Figure 5 FIG. is a schematic diagram of a titanium alloy grille according to an embodiment of the present invention.

[0045] Among them, Figures 3a to 5 The corresponding relationship between the reference numerals and the component names in the figures is as follows:

[0046] 100 titanium alloy grille, 110 grille hole, 111 path trajectory of the intermediate grille hole, 112 contour of the final grille hole, 113 first trimming trajectory, 114 second trimming trajectory, 115 third trimming trajectory. Detailed Embodiments

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0048] To make the technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail in conjunction with the accompanying drawings.

[0049] Figure 1 It is a flowchart of the steps of a titanium alloy grid processing method according to an embodiment of the present invention; Figure 5 It is a schematic diagram of a titanium alloy grid according to an embodiment of the present invention.

[0050] As Figure 1 and Figure 5 shown, an embodiment of the present invention provides a titanium alloy grid processing method based on water-guided laser. The titanium alloy grid processing method includes the following steps:

[0051] Step 1, clamping and positioning the titanium alloy part to be processed;

[0052] Step 2, processing the intermediate grid holes of the titanium alloy part to be processed based on water-guided laser to obtain an intermediate part;

[0053] Step 3, processing the final grid holes of the intermediate part based on water-guided laser to obtain a primary titanium alloy grid;

[0054] Step 4, cleaning the surface of the primary titanium alloy grid to obtain a final titanium alloy grid;

[0055] Step 5, detecting the grid holes of the final titanium alloy grid.

[0056] Among them, the processing method of the titanium alloy grid 100 includes first clamping and positioning the titanium alloy part to be processed, and then using water-guided laser to first process the preliminary grid hole contour (the contour of the intermediate grid hole) of the titanium alloy part to be processed, and then performing final processing on the preliminary grid hole contour, and finally performing surface cleaning to obtain the final titanium alloy grid 100, and then detecting the final titanium alloy grid 100. Through such a processing method, the processing efficiency and processing quality of the titanium alloy grid 100 can be improved. During the processing, the flow state of the water jet is changed, thereby improving the processing efficiency, and the processing time of a single grid hole 110 is significantly shortened, and the surface remelting layer of the titanium alloy grid 100 can be eliminated through secondary processing, improving the processing quality of the titanium alloy grid 100.

[0057] Specifically, the processing method of the titanium alloy grid 100 of the present application is simple to operate and easy to implement, and is suitable for application in the actual production of water-guided laser processing of titanium alloy grids 100. On the one hand, it can improve the processing efficiency of the titanium alloy grid 100; on the other hand, it improves the processing quality of the titanium alloy grid 100.

[0058] In a feasible implementation manner, clamping and positioning the titanium alloy part to be processed includes:

[0059] Installing the titanium alloy part to be processed on a tooling fixture and moving it to the processing area of the water-guided laser;

[0060] A contact probe based on water-guided laser is used to position the titanium alloy part to be machined in the machining coordinate system.

[0061] Among them, the contact probe is brought into contact with the surface of the titanium alloy part to be machined to obtain the coordinate data of the key points on the surface of the titanium alloy part to be machined. Through mathematical calculations, the coordinate data is aligned with the machining coordinate data. The contact probe contacts the key geometric features (plane, hole, edge, etc.) on the titanium alloy part to be machined. When the probe of the contact probe touches the surface of the titanium alloy part to be machined, a signal is emitted, and the water-guided laser equipment records the coordinates at this moment. The position of the titanium alloy part to be machined is located through the contact probe, and the machining origin is automatically corrected to provide an accurate reference for subsequent machining.

[0062] It can be understood that different fixtures are formulated according to different titanium alloy parts to be machined, usually small jaws or pressing blocks. Usually, the fixtures are set on the length side or width side of the titanium alloy part to be machined. When the surface of the titanium alloy part to be machined is a special-shaped part, the fixture can be set at the rigid edge of the titanium alloy part to be machined to improve the stability and reliability of subsequent grid hole machining.

[0063] In a feasible implementation manner, the contour machining of the intermediate grid holes on the titanium alloy part to be machined based on water-guided laser includes:

[0064] Set the machining program using the circumferential milling method, and the scanning speed of the circumferential milling is set to a periodic variable-speed scanning of three scanning speeds;

[0065] Load the path trajectory program and run the path trajectory program once without processing;

[0066] Check whether the water jet covers the entire area of the titanium alloy part to be machined. If so, proceed to the next step; otherwise, re-clamp and position the titanium alloy part to be machined.

[0067] Run the machining program and the path trajectory program to obtain the intermediate part.

[0068] Among them, before formal processing, the machining program is selected first. This application adopts the circumferential cutting machining method and performs periodic variable-speed scanning at three scanning speeds. At the same time, the path trajectory program is loaded. And without turning on the laser, that is, running the loaded path trajectory once empty, and observing whether the entire loaded path trajectory covers the surface of the titanium alloy part to be machined. If it covers the surface of the titanium alloy part to be machined, the machining of the intermediate grid holes can be carried out according to the machining program (circumferential cutting machining method) and the path trajectory program; if the loaded path trajectory during the empty run does not cover the entire surface of the titanium alloy part to be machined, the clamping position of the titanium alloy part to be machined needs to be adjusted, and the loaded path trajectory is run empty again until the loaded path trajectory can cover the entire titanium alloy part to be machined. The empty run means running the path trajectory program once without turning on the laser.

[0069] Specifically, the contour of the intermediate grid holes is machined by the circumferential cutting machining method. In the machining program of the circumferential cutting machining method, it is set to perform periodic variable-speed scanning at three scanning speeds. During the machining process, periodic variable-speed scanning machining is adopted, which changes the flow state of the water jet during the machining process, thereby improving the machining efficiency of the titanium alloy grid 100. The machining time of a single intermediate grid hole can be controlled within 2 minutes. Among them, when the water-guided laser is always machining at one speed, the water jet will flow in the hole in the same state, and a periodic rupture will occur. Such a water flow state is not conducive to efficient machining. Therefore, adopting periodic variable-speed scanning can avoid the periodic rupture of the water jet, and thus improve the machining efficiency. The existing machining time of a single intermediate grid hole is usually 2 minutes and 30 seconds to 3 minutes. Therefore, the machining efficiency is increased by 20% to 33%.

[0070] It should be noted that checking whether the water jet covers the entire area of the titanium alloy part to be machined can prevent the titanium alloy part to be machined from being damaged if there is an error in the program when the water-guided laser starts machining, that is, ensuring the accuracy of the machining path trajectory and improving the reliability of the machining of the intermediate grid holes.

[0071] It can be understood that the grid holes 110 (that is, the contour 112 of the ultimate grid holes) are machined one by one.

[0072] In a feasible implementation manner, in the circumferential cutting machining method, the distance between the path trajectory 111 of the intermediate grid holes and the contour 112 of the ultimate grid holes is: half of the water beam diameter of the water jet plus 60 microns.

[0073] That is to say, the distance L between the path trajectory 111 of the intermediate grid holes and the contour 112 of the ultimate grid holes is L=(D / 2 + 60μm), where D is the water beam diameter.

[0074] It is understandable that the energy beam of the water-guided laser is circular. Usually, the path trajectory is set based on the center point of the energy beam for data calculation. Therefore, a radius allowance of the energy beam needs to be left during processing, that is, half of the water beam diameter D / 2. In fact, the distance between the contour of the intermediate grid hole and the contour 112 of the final grid hole is 60 μm, which is also the distance for subsequent trimming. As Figures 3a to 3c shown, there is a distance difference of D / 2 between the path trajectory 111 of the intermediate grid hole and the contour of the intermediate grid hole. That is to say, the contour of the intermediate grid hole is at the position where the path trajectory 111 of the intermediate grid hole is expanded outward by D / 2.

[0075] Figure 3a Schematic diagram of the first lap processing of the path trajectory of the intermediate grid hole according to an embodiment of the present invention; Figure 3b Schematic diagram of the second lap processing of the path trajectory of the intermediate grid hole according to an embodiment of the present invention; Figure 3c Schematic diagram of the third lap processing of the path trajectory of the intermediate grid hole according to an embodiment of the present invention.

[0076] In a feasible implementation manner, as Figure 3a , Figure 3b and Figure 3c shown, the scanning parameters of the periodic variable-speed scanning are: 110 mm / min to 130 mm / min for the first lap, 80 mm / min to 100 mm / min for the second lap, and 140 mm / min to 160 mm / min for the third lap, and the cycle repeats until the intermediate grid hole is formed.

[0077] In this embodiment, during the periodic variable-speed scanning, it is 120 mm / min for the first lap, 90 mm / min for the second lap, 150 mm / min for the third lap, 120 mm / min for the fourth lap, 90 mm / min for the fifth lap, and so on in a cycle until the intermediate grid hole is processed into a through hole. This depends on the thickness of the titanium alloy part to be processed. Titanium alloy parts with different thicknesses will obtain the intermediate grid hole through different numbers of laps of processing. It is understandable that multi-lap processing is to form a permeable intermediate grid hole. Therefore, the periodic variable-speed scanning is all carried out on the path trajectory 111 of the intermediate grid hole.

[0078] It should be noted that variable-speed scanning can change the flow state of the water jet, conduct the laser more efficiently, and improve the processing efficiency. That is to say, the processing method of combining fast and slow can effectively improve the processing efficiency of the grid hole 110.

[0079] Figure 2 Flow chart of the steps for processing the final grid hole according to an embodiment of the present invention; Figure 4 Schematic diagram of the processing of the final grid hole according to an embodiment of the present invention.

[0080] In a feasible implementation, as Figure 2 and Figure 4 shown, the processing of the final grid hole 110 on the intermediate part based on water-jet guided laser includes:

[0081] Step 301, perform the first trimming trajectory processing on the intermediate grid hole to obtain the first grid hole;

[0082] Step 302, perform the second trimming trajectory processing on the first grid hole to obtain the second grid hole;

[0083] Step 303, perform the third trimming trajectory processing on the second grid hole to obtain the final grid hole.

[0084] Specifically, after obtaining the through intermediate grid hole through the above-mentioned circumferential cutting processing, perform the first trimming trajectory 113 processing operation on the path trajectory 111 of the intermediate grid hole to obtain the first grid hole; perform the second trimming trajectory 114 processing operation on the first grid hole to obtain the second grid hole; perform the third trimming trajectory 115 processing operation on the second grid hole to obtain the contour 112 of the final grid hole, that is, the final grid hole 110.

[0085] It should be noted that during the metal processing, the molten metal formed by cutting the metal is not removed in time and re-solidifies to form a remelting layer. The existence of the remelting layer will reduce the performance and service life of the titanium alloy grid 100. Through multi-step trimming operations, the remelting layer can be washed away by the water jet repeatedly, that is, the remelting layer on the processing surface of the titanium alloy grid 100 can be effectively eliminated, thereby improving the processing quality of the titanium alloy grid 100.

[0086] In a feasible implementation, the distance between the first trimming trajectory 113 and the path trajectory 111 of the intermediate grid hole is 30 μm, the distance between the second trimming trajectory 114 and the first trimming trajectory 113 is 20 μm, and the trimming distance between the third trimming trajectory 115 and the second trimming trajectory 114 is 10 μm.

[0087] Among them, as Figure 4 visible, by setting the trimming trajectory based on the path trajectory 111 of the intermediate grid hole, the stability and reliability of the path trajectory program can be improved. Finally, a distance of D / 2 is left for the energy beam of the water-jet guided laser along the third trimming trajectory 115. Therefore, after trimming along the third trimming trajectory 115, the contour 112 of the final grid hole is obtained, that is, the grid hole 110.

[0088] It can be understood that the first grid hole obtained after processing by the water-guided laser along the first trimming trajectory 113 is the distance of D / 2 outward expansion from the first trimming trajectory 113 in the direction of the second trimming trajectory; similarly, the second grid hole obtained after processing by the second trimming trajectory 114 is the distance of D / 2 outward expansion from the second trimming trajectory 114 in the direction of the third trimming trajectory 115; the final grid hole obtained after processing by the third trimming trajectory 115 also expands outward by a distance of D / 2, that is, the contour 112 of the final grid hole is formed, which is the final grid hole 110.

[0089] It should be noted that during the trimming operation, the thickness of the remelted layer gradually decreases. Therefore, gradually reducing the trimming distance can, on the one hand, effectively remove the remelted layer, and on the other hand, ensure the machining accuracy of the grid hole 110.

[0090] In a feasible implementation manner, the surface cleaning of the primary titanium alloy grid includes:

[0091] Remove the primary titanium alloy grid from the clamping and positioning location for surface cleaning. The surface cleaning includes using a cotton yarn dipped in alcohol to clean the surface of the primary titanium alloy grid.

[0092] Among them, take the processed primary titanium alloy grid off the tooling fixture for cleaning, reinstall a new titanium alloy part to be processed on the fixture, and process the next titanium alloy grid 100. At the same time, use a clean cotton yarn dipped in alcohol to clean the surface of the primary titanium alloy grid to obtain the final titanium alloy grid 100.

[0093] It can be understood that the surface of the primary titanium alloy grid can also be cleaned by using a clean cotton yarn dipped in acetone, as long as the oil stains and water stains on the primary titanium alloy grid can be removed.

[0094] In a feasible implementation manner, the inspection of the grid holes of the final titanium alloy grid includes:

[0095] Measure the size of the grid holes of the final titanium alloy grid with a vernier caliper;

[0096] Measure the surface roughness of the final titanium alloy grid with a white light interferometer;

[0097] Use a magnifying glass to check whether there are cracks around the final grid holes.

[0098] Among them, the dimensional error of the size of the grille hole 110 during detection is ±0.1mm, and the surface roughness is ≤Ra3.2. Usually, if there are cracks on the final grille holes, it will be directly identified as an unqualified product. Therefore, in order to avoid the existence of cracks on the final grille holes, the preliminary process will optimize the processing parameters, such as laser power, repetition rate, pulse width, etc., and select appropriate laser processing parameters. The final grille holes processed under this processing parameter will greatly reduce the probability of cracks. The presence of cracks will affect the premature failure of the titanium alloy grille, which will shorten the service life of the titanium alloy grille. The size and roughness of the grille holes can be known according to the processing requirements, and will not be repeated.

[0099] In a feasible implementation, after the inspection is completed, the final-grade titanium alloy grille 100 is placed in a corresponding packaging box, and it is confirmed that the part number of the final-grade titanium alloy grille is consistent with the part number of the packaging box, and the packaging box containing the final-grade titanium alloy grille 100 is placed in a turnover box for unified storage.

[0100] Usually, each titanium alloy grille 100 is assigned a part number, so that titanium alloy grilles with different part numbers are placed in packaging boxes with corresponding part numbers to protect the titanium alloy grilles 100. Finally, several packaging boxes are turned over together into a turnover box for storage and then transported to the next process.

[0101] It can be understood that the final titanium alloy grid 100 is the titanium alloy grid 100, and the final grid holes 110 are grid holes.

[0102] The following is an example of processing 3×3mm hexagonal grid holes of 2mm thick titanium alloy.

[0103] First, install the titanium alloy parts to be processed on the fixture and move them to the processing area of ​​the water-guided laser. Use the contact probe provided by the water-guided laser to locate the titanium alloy parts to be processed in the coordinate system.

[0104] According to the set final grid hole profile, the processing program is first set using the circular cutting processing method, in which the scanning speed is set to three scanning speeds of periodic variable speed scanning, such as 120mm / min for the first circle, 90mm / min for the second circle, and 150mm / min for the third circle, and the periodic cycle is repeated until a transparent middle grid hole is processed. Figures 3a to 3c As shown;

[0105] Set the circular cutting process trajectory, that is, the distance between the intermediate grid hole processing trajectory and the final grid hole contour L = D / 2 + 60 μm, where D is the water jet diameter of the water jet;

[0106] After the machining program setting of the circumferential cutting machining method is completed, load the path trajectory program. By observing the movement trajectory of the water jet on the titanium alloy part to be machined, confirm the running program and check that the range swept by the water jet includes all the machining areas of the titanium alloy part to be machined.

[0107] Start the water-guided laser machining equipment and machine the intermediate grid holes of the titanium alloy part to be machined according to the set machining program and path trajectory. The staff monitors the machining situation of the intermediate grid holes throughout the process to ensure that the machined intermediate grid holes are completely transparent. According to the circumferential cutting machining program with periodic variable speed scanning, the contour of a single intermediate grid hole can be machined within 2 minutes, which can improve the machining efficiency of the final grid holes.

[0108] After the intermediate grid holes are machined completely transparent, perform multi-step trimming trajectory machining. As Figure 4 shown, perform the first trimming trajectory machining on the path trajectory of the intermediate grid holes, with a distance of 30 μm between them, to obtain the first grid hole. Based on the first trimming trajectory, perform the second trimming trajectory machining, with a distance of 20 μm between them, to obtain the second grid hole. Based on the second trimming trajectory, perform the third trimming trajectory machining, with a distance of 10 μm between them, to obtain the final grid hole and the primary titanium alloy grid; According to the above method, the remelting layer on the machining surface of the titanium alloy grid can be eliminated.

[0109] Remove the machined primary titanium alloy grid from the fixture, clean it, and use a clean cotton yarn dipped in alcohol to clean the surface of the primary titanium alloy grid to obtain the final titanium alloy grid.

[0110] Use a vernier caliper to measure the geometric dimensions of the final grid holes, use a white light interferometer to measure the surface roughness of the final grid holes, and use a 5x magnifying glass to check whether there are cracks around the final grid holes.

[0111] Place the final titanium alloy grid in the corresponding packaging box, ensure that the part number of the titanium alloy grid is consistent with the part number of the packaging box, and store them uniformly in the turnover box.

[0112] Through the above titanium alloy grid machining method, high-efficiency and high-quality machining of titanium alloy grids by water-guided laser can be achieved. During the machining process, periodic variable speed scanning machining is adopted, which changes the flow state of the water jet during the machining process, thereby improving the machining efficiency and enabling the machining time of a single intermediate grid hole to be controlled within 2 minutes. At the same time, through multi-step trimming machining, the remelting layer on the machining surface of the titanium alloy grid can be eliminated, improving the machining quality of the final titanium alloy grid.

[0113] In the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plural" means two or more, unless otherwise clearly defined.

[0114] Other embodiments of the present invention will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and examples are only illustrative.

[0115] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for processing titanium alloy grids based on water-jet guided laser, characterized in that, The titanium alloy grille processing method includes the following steps: Clamp and position the titanium alloy part to be processed; Based on water-jet guided laser, process the intermediate grille holes of the titanium alloy part to be processed to obtain an intermediate part; Based on the water-jet guided laser, process the final grille holes of the intermediate part to obtain a primary titanium alloy grille; Clean the surface of the primary titanium alloy grille to obtain a final titanium alloy grille; Detect the grille holes of the final titanium alloy grille.

2. The method for machining a titanium alloy grid based on water-jet guided laser according to claim 1, wherein The clamping and positioning of the titanium alloy part to be processed includes: Install the titanium alloy part to be processed on a tooling fixture and move it to the processing area of the water-jet guided laser; Based on the contact probe of the water-jet guided laser, position the titanium alloy part to be processed in the processing coordinate system.

3. The method for processing a titanium alloy grid based on water-jet guided laser according to claim 1, wherein The processing of the intermediate grille holes of the titanium alloy part to be processed based on the water-jet guided laser includes: Set the processing program using the circumferential cutting method, and the scanning speed of the circumferential cutting is set to periodic variable-speed scanning of three scanning speeds; Load the path trajectory program and run the path trajectory program once without processing; Check whether the water jet covers the entire area of the titanium alloy part to be processed. If so, proceed to the next step; otherwise, re-clamp and position the titanium alloy part to be processed; Run the processing program and the path trajectory program to obtain the intermediate part.

4. The method for machining a titanium alloy grid based on water-jet guided laser according to claim 3, wherein, In the circumferential cutting method, the distance between the path trajectory of the intermediate grille hole and the contour of the final grille hole is: half of the water beam diameter of the water jet plus 60 microns.

5. The method for machining a titanium alloy grid based on water-jet guided laser according to claim 3, wherein The scanning parameters of the periodic variable-speed scanning are: 110 mm / min to 130 mm / min for the first circle, 80 mm / min to 100 mm / min for the second circle, and 140 mm / min to 160 mm / min for the third circle, and the cycle repeats until the intermediate grille hole is formed.

6. The method for machining a titanium alloy grid based on water-jet guided laser according to claim 1, characterized in that, The processing of the final grille holes of the intermediate part based on the water-jet guided laser includes: Perform the first trimming trajectory processing on the intermediate grille hole to obtain the first grille hole; Perform the second trimming trajectory processing on the first grille hole to obtain the second grille hole; Perform the third trimming trajectory processing on the second grille hole to obtain the final grille hole.

7. The method for machining a titanium alloy grid based on water-jet guided laser according to claim 6, characterized in that, The distance between the first trimming trajectory and the path trajectory of the intermediate grille hole is 30 μm, the distance between the second trimming trajectory and the first trimming trajectory is 20 μm, and the distance between the third trimming trajectory and the second trimming trajectory is 10 μm.

8. The method for machining a titanium alloy grid based on water-jet guided laser according to claim 1, wherein, The surface cleaning of the primary titanium alloy grille includes: Remove the primary titanium alloy grille from the clamping and positioning and perform surface cleaning. The surface cleaning includes cleaning the surface of the primary titanium alloy grille with a cotton yarn dipped in alcohol.

9. The method for processing a titanium alloy grid based on water-jet guided laser according to claim 1, wherein, The detection of the grille holes of the final titanium alloy grille includes: Detect the size of the grille holes of the final titanium alloy grille with a vernier caliper; Detect the surface roughness of the final titanium alloy grille with a white light interferometer; Use a magnifying glass to detect whether there are cracks around the final grille holes.

10. The method for processing a titanium alloy grid based on water-jet guided laser according to claim 9, characterized in that, After the detection is completed, place the ultimate titanium alloy grille in the corresponding packaging box, and confirm that the part number of the ultimate titanium alloy grille is consistent with that of the packaging box. Place the packaging box containing the ultimate titanium alloy grille in a turnover box for unified storage.

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