Composite hot drilling processing method and system

Abstract

The invention discloses a composite hot drilling machining method and system.The composite hot drilling machining method comprises the steps that a laser device is arranged below a workpiece, a drilling tool is arranged above the workpiece, the laser device irradiates a laser beam to the position, to be drilled, of the workpiece so as to preheat the workpiece, and after workpiece preheating is completed, the drilling tool is driven to rotate; and the ultrasonic vibration module controls the drilling tool to perform ultrasonic vibration and rotation, so that the drilling tool drills the workpiece. The to-be-drilled area of the workpiece is softened firstly, drilling resistance is reduced, the machinable performance of the workpiece is improved, cutter breakage caused by too large resistance during drilling is avoided, the laser and the drilling cutter are located on the upper side and the lower side of the workpiece respectively, the laser irradiates the to-be-drilled area of the workpiece from bottom to top, the drilling cutter drills the workpiece from top to bottom, and the drilling efficiency is improved. When the laser irradiates the laser beam to the workpiece, the drilling tool avoids the laser beam, the laser beam does not irradiate the drilling tool, the influence of laser irradiation on the drilling tool can be reduced, and the service life of the drilling tool is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of material hot drilling, and in particular to a composite hot drilling processing method and system. Background Art

[0002] In the related technology, a laser is used to emit a laser to the position of a workpiece to be drilled, so that the area of ​​the workpiece to be drilled is softened, and then the tool is controlled to start drilling, thereby reducing the resistance of the tool to drill and avoiding tool breakage due to excessive resistance. However, when the laser is irradiated to the workpiece, the laser is likely to act on the tool, and the irradiation temperature of the laser is high, which can easily cause damage to the tool, causing drastic changes in the hardness and strength of the tool, or even melting through, and the debris generated by the processing is likely to adhere to the tool, affecting the tool's service life and processing quality. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a composite hot drilling method, which can reduce the influence of laser irradiation on the drill bit and increase the service life of the drill bit.

[0004] The invention also provides a composite hot drilling system.

[0005] The composite hot drilling method according to the first aspect of the present invention comprises:

[0006] The laser is located below the workpiece, and the drill is located above the workpiece;

[0007] The laser is controlled to irradiate a laser beam to a position of a workpiece to be drilled, so as to preheat the workpiece. After the workpiece is preheated, the ultrasonic vibration module controls the drill to perform ultrasonic vibration and rotation, so that the drill drills the workpiece.

[0008] The composite hot drilling method according to the embodiment of the present invention has at least the following beneficial effects:

[0009] In the present invention, the area to be drilled of the workpiece is softened first to reduce the resistance of drilling, improve the machinability of the workpiece, and avoid tool breakage due to excessive resistance during drilling. Since the laser and the drill are respectively located on the upper and lower sides of the workpiece, the laser irradiates the area to be drilled of the workpiece from bottom to top, and the drill drills the workpiece from top to bottom. When the laser irradiates the laser beam to the workpiece, the drill avoids the laser beam, and the laser beam does not irradiate the drill, which can reduce the influence of laser irradiation on the drill. In addition, the drill is in an ultrasonic vibration state during the processing, which is convenient for chip removal, avoids the adhesion of the drill to the workpiece, and improves the service life of the drill.

[0010] According to some embodiments of the present invention, after the preheating of the workpiece is completed, the laser is kept irradiating the workpiece so that the drill continues to drill the workpiece.

[0011] According to some embodiments of the present invention, after the workpiece is preheated, the laser is turned off, so that the drill continues to drill the workpiece until the workpiece is penetrated.

[0012] According to some embodiments of the present invention, when the drill reaches a preset depth, the laser is turned off, so that the drill continues to drill the workpiece until the workpiece is penetrated;

[0013] Alternatively, after the drill drills to a preset depth, the power of the laser is continuously reduced until the drill drills through the workpiece.

[0014] According to some embodiments of the present invention, the diameter of the laser beam spot of the laser is R1, the diameter of the hole to be drilled in the workpiece is R2, and R2<R1<2R2;

[0015] and / or, the central axis of the laser beam is coaxial with the central axis of the hole to be drilled in the workpiece;

[0016] And / or, the laser beam is irradiated perpendicularly to the surface of the workpiece.

[0017] According to some embodiments of the present invention, the ultrasonic amplitude of the drill is 0.1 μm-10 μm;

[0018] And / or, the power of the laser is 100W-500W;

[0019] And / or, the distance between the upper end of the laser and the lower end of the workpiece is 20-100 mm.

[0020] According to some embodiments of the present invention, the total working time of the drill is T, the time for the laser to preheat the workpiece is T1, the time for the drill and the laser to work simultaneously is T2, and the time for the drill to work alone is T3, wherein T=T2+T3, 2.5≤T2 / T3≤10, 1.5≤T1 / T3≤4.

[0021] According to some embodiments of the present invention, the method further includes acquiring working parameters, wherein the working parameters include at least one of the rotation speed of the drill, the power of the laser, and the start time of the laser at different time points;

[0022] Acquire an image of a processed hole after drilling of the workpiece, and extract feature information of the processed hole, wherein the feature information includes at least one of a height and a diameter of the processed hole;

[0023] A functional relationship between the characteristic information and the operating parameters is established.

[0024] According to a second aspect of the present invention, a composite hot drilling system includes:

[0025] A workbench, used to mount and fix the workpiece to be drilled;

[0026] A laser is located below the workbench, and the laser can emit a laser beam to the workpiece;

[0027] A drill, located above the workbench, capable of rotating and drilling a workpiece;

[0028] The ultrasonic vibration module is connected to the drill and is used to provide ultrasonic vibration to the drill.

[0029] The composite hot drilling system according to the embodiment of the present invention has at least the following beneficial effects:

[0030] In the present invention, a laser is used to soften the area of ​​the workpiece to be drilled to avoid tool breakage due to excessive resistance during drilling. The laser and the drill are respectively located on the upper and lower sides of the workpiece. When the laser irradiates the workpiece with a laser beam, the drill avoids the laser beam and the laser beam does not irradiate the drill, thereby reducing the influence of laser irradiation on the drill and increasing the service life of the drill.

[0031] According to some embodiments of the present invention, the composite hot drilling system further includes a data acquisition module, an image acquisition module, an image processing module and a data analysis module;

[0032] The data acquisition module is used to acquire the working parameters of the drill and the laser, wherein the working parameters include at least one of the rotation speed of the drill at different time points, the power of the laser, and the start time of the laser;

[0033] The image acquisition module is used to obtain an image of a processed hole after the workpiece is drilled, and the image processing module extracts feature information of the processed hole based on the image, wherein the feature information includes at least one of a height and a diameter;

[0034] The data analysis module is used to establish a functional relationship between the characteristic information and the working parameters.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0037] Figure 1 A schematic diagram of a composite hot drilling method according to an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the drill in different drilling states;

[0039] Figure 3 Schematic diagram of the laser spot and drilling area;

[0040] Figure 4 It is a schematic diagram of an embodiment of the composite hot drilling system of the present invention.

[0041] Reference numerals:

[0042] Laser 100; workpiece 200; drill 300; workbench 400; ultrasonic vibration module 500, power supply unit 510, ultrasonic tool holder 520; ultrasonic power supply 600; machine tool spindle 700. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] Reference Figure 1 and Figure 2 In one embodiment of the present invention, a composite hot drilling method is provided. Hot melt drilling can process a bushing through hole. The bushing through hole can extend the tapping distance and enhance the firmness of the threaded connection between the workpieces 200. The composite hot drilling method of the present invention comprises the following steps:

[0049] The laser 100 is located below the workpiece 200, and the drill 300 is located above the workpiece 200; first, the laser 100 is controlled to irradiate the laser beam to the position to be drilled of the workpiece 200. The laser beam has a high energy density and can soften the area to be drilled of the workpiece 200 in a short time and reach the plastic deformation temperature, thereby completing the preheating of the workpiece 200; after the preheating of the workpiece 200 is completed, the ultrasonic vibration module 500 controls the drill 300 to perform ultrasonic vibration and rotation, so that the drill 300 drills the workpiece 200.

[0050] Figure 2 Figures (a), (b), and (c) in the figure respectively show schematic diagrams of the drill 300 just contacting the upper surface of the workpiece 200, the drill 300 having drilled into the interior of the workpiece 200, and the drill 300 drilling through the workpiece 200 to form a bushing through hole. By first softening the area to be drilled of the workpiece 200, the resistance of drilling is reduced, the machinability of the workpiece 200 is improved, and the tool breakage caused by excessive resistance during drilling is avoided. In addition, since the laser 100 and the drill 300 are respectively located on the upper and lower sides of the workpiece 200, the laser 100 irradiates the area to be drilled of the workpiece 200 from bottom to top, and the drill 300 drills the workpiece 200 from top to bottom, when the laser 100 irradiates the laser beam to the workpiece 200, the drill 300 avoids the laser beam, and the laser beam will not irradiate the drill 300, which can reduce the influence of laser irradiation on the drill 300 and improve the service life of the drill 300.

[0051] It should be noted that in the process of traditional hot melt drilling, debris is easily adhered to the drill bit 300, which wears the tool, and the drill bit 300 and the workpiece 200 generate high friction heat to soften the material. When the temperature is not high, the tool is easily stuck and locked, which aggravates the wear of the drill bit 300 and affects the tool life. In the present invention, the laser beam is used to soften the area to be drilled of the workpiece 200 in advance, and there is no need for friction heat generation between the drill bit 300 and the workpiece 200, which can reduce the wear of the drill bit 300 during the drilling process and reduce the risk of sticking and locking the tool; and the drill bit 300 is always affected by the ultrasonic vibration module 500 during the drilling process, and is in a high-frequency ultrasonic vibration state and continuously rotates. On the one hand, ultrasonic vibration can improve the rigidity of the entire drilling system, make the drilling process more stable, and can improve the deformation limit of the workpiece 200 material, change the product processing quality, and on the other hand, it is convenient for chip removal, avoids the adhesion or breakage of the drill bit 300 and the workpiece 200, and prolongs the tool life. In addition, the diameter range of the drilling hole can be expanded so that the method can meet the requirements of drilling holes with small diameters.

[0052] In addition, in the traditional drilling method, the laser and the tool are set on the same side of the workpiece 200, which not only causes the laser beam to irradiate the tool during the drilling process, causing tool damage, but if the material of the workpiece 200 is relatively hard, the irradiation temperature of the laser 100 is relatively high, which will directly cause the tool to be melted through. In addition, when the tool is gradually fed, there is also a risk of collision with the laser 100, resulting in interruption of the drilling process. In addition, in order to enable the tool to feed perpendicular to the surface of the workpiece 200 and form a vertical borehole, the laser 100 must irradiate the laser beam to the workpiece 200 at an inclined incident angle to avoid the tool, and the heat of the inclined laser beam is not concentrated, and the heating efficiency is low, which affects the drilling efficiency. In the present invention, the laser 100 is arranged below the workpiece 200, and the drill 300 is arranged above the workpiece 200. On the one hand, the laser beam will not irradiate the drill 300, which can extend the service life of the drill 300. On the other hand, the irradiation direction of the laser beam is not affected by the tool feed path, so the laser beam can be irradiated perpendicular to the surface of the workpiece 200, so that the light spot is concentrated on the area to be drilled of the workpiece 200. The processing efficiency of the laser 100 is high and the drilling efficiency can be improved.

[0053] In one embodiment, the central axis of the laser beam is coaxial with the central axis of the hole to be drilled in the workpiece 200, so that the spot of the laser beam is as close to the center position of the hole to be drilled as possible, and the laser 100 can heat the workpiece 200 with the maximum energy density, thereby improving the heating efficiency of the laser 100; it is understandable that the central axis of the hole to be drilled should be coaxial with the central axis of the drill 300. By setting the central axis of the laser beam to be coaxial with the central axis of the hole to be drilled in the workpiece 200, the laser beam can always avoid the tool before the drill 300 drills through the workpiece 200, thereby preventing the laser beam from directly irradiating the tool and causing damage to the tool.

[0054] In another embodiment, referring to Figure 3 The spot diameter of the laser beam emitted by the laser 100 is R1, the diameter of the hole to be drilled in the workpiece 200 is R2, and the spot diameter and the diameter of the hole to be drilled satisfy: R2<R1<2R2, so that the spot diameter of the laser beam irradiated on the surface of the workpiece 200 exceeds the diameter of the hole to be drilled, and the area to be drilled in the workpiece 200 can be softened by laser irradiation, and the spot center of the laser beam is maximized to be close to the center position of the hole to be drilled, and the area to be drilled is within the high energy range of the laser beam, thereby improving the heating efficiency of the laser 100.

[0055] In one embodiment, the distance between the upper end of the laser 100 and the lower end of the workpiece 200 is set to 20 mm-100 mm, so that the laser beam can stably and reliably continue to irradiate the area to be drilled of the workpiece 200, and can ensure that the high-energy area of ​​the laser beam is irradiated on the workpiece 200, thereby improving the heating efficiency of the laser 100 on the workpiece 200.

[0056] It is understandable that, since the laser 100 irradiates the workpiece 200 from bottom to top, the heating rate of the lower part of the workpiece 200 is higher than the heating rate of the upper part of the workpiece 200. In one embodiment, when the temperature of the upper part of the workpiece 200 meets the drilling requirement, the preheating of the workpiece 200 is completed, and the laser 100 is turned off at this time, and the laser 100 stops irradiating the laser beam to the workpiece 200, and then the drill 300 is controlled to support the drilling of the workpiece 200 until the workpiece 200 is completely drilled through; on the one hand, when the temperature of the upper part of the workpiece 200 meets the drilling requirement, the lower part of the workpiece 200 will inevitably meet the drilling requirement, and any area in the drilling height direction has been softened, and the drill 300 is processed to any area. When the depth is greater than 100, less resistance can be encountered, which is convenient for processing and can extend the life of the tool. Moreover, after the workpiece 200 is preheated, the temperature of the workpiece 200 gradually decreases from bottom to top. During the processing of the drill 300, the temperature of the workpiece 200 gradually decreases over time. When the drill 300 processes to the lower area of ​​the workpiece 200, the temperature of the lower area of ​​the workpiece 200 has been reduced, which can reduce the risk of damage to the tool due to heat accumulation in the hole caused by the deeper drilling depth. On the other hand, since the laser 100 is turned off before the drill 300 drills through the workpiece 200, the drill 300 will not be irradiated by the laser beam after drilling through the workpiece 200, which will affect the performance of the tool itself.

[0057] In another embodiment, after the laser 100 completes preheating of the workpiece 200, the laser 100 is maintained in the irradiation state of the workpiece 200, so that the drill 300 can drill the workpiece 200 synchronously. In this case, since the drill 300 drills from top to bottom, when the drill 300 processes the upper area of ​​the workpiece 200, the depth of the hole is small, and the resistance of the drill 300 is small. The laser 100 preheats the workpiece 200 for a short period of time to meet the processing requirements of the upper area. At this time, the preheating of the workpiece 200 has been completed, and the drill 300 can immediately perform drilling processing on the workpiece 200, and the processing efficiency is high; during the processing of the drill 300, the laser 100 is maintained in the irradiation state of the workpiece 200. On the one hand, it is prevented that the workpiece 200 is cooled down quickly after the laser beam is withdrawn, resulting in a significant increase in processing resistance. On the other hand, the laser beam continues to heat the workpiece 200, so that the workpiece 200 continues to heat up and soften, and reaches the processing temperature required for the corresponding drilling depth, thereby improving the processing quality.

[0058] Furthermore, after the workpiece 200 is preheated, the laser 100 is kept irradiating the workpiece 200, and the drill 300 is synchronously used to drill the workpiece 200. When the drill 300 drills to a preset depth, the laser 100 is turned off, and then the drill 300 is controlled to continue drilling until the workpiece 200 is drilled through. On the one hand, the greater the depth of the hole, the more heat is accumulated in the hole. By turning off the laser 100 in advance, it is possible to avoid the continuous heating of the workpiece 200 after drilling to a certain depth, resulting in heat accumulation in the hole and affecting the service life of the drill 300. On the other hand, it is possible to avoid the drill 300 being directly irradiated by the laser beam after drilling through the workpiece 200, thereby affecting the tool performance and life.

[0059] Alternatively, in another embodiment, after the workpiece 200 is preheated, the laser 100 is maintained in the irradiation state of the workpiece 200, and the drill 300 is synchronously used to drill the workpiece 200. When the drill 300 drills to a preset depth, the power of the laser 100 is continuously reduced until the drill 300 drills through the workpiece 200. By reducing the power of the laser 100, the heating rate of the workpiece 200 can be reduced, and the temperature of the workpiece 200 is prevented from being too high, resulting in heat accumulation in the hole and affecting the service life of the drill 300. In addition, during the processing of the workpiece 200 by the drill 300, the workpiece 200 is continuously irradiated by the laser beam, so that all parts of the area to be drilled of the workpiece 200 are kept in a softened state, which is conducive to improving the processing quality and processing efficiency. In addition, it can be further arranged that when the drill 300 drills through the workpiece 200, the laser 100 is turned off to prevent the laser 100 from directly irradiating the drill 300 and causing tool damage.

[0060] For the processing method of "after the workpiece 200 is preheated, the laser 100 is kept irradiating the workpiece 200, and the drill 300 is synchronously used to drill the workpiece 200, and when the drill 300 drills to a preset depth, the laser 100 is turned off, and then the drill 300 is controlled to continue drilling until the workpiece 200 is drilled through", the total working time of the drill 300 is T, the time for the laser 100 to preheat the workpiece 200 is T1, the time for the drill 300 and the laser 100 to work simultaneously is T2, and the time for the drill 300 to work alone is T3. It should be noted that the “time when the drill 300 and the laser 100 work simultaneously” refers to the time when, after the workpiece 200 is preheated, the drill 300 performs drilling synchronously while the laser 100 continues to irradiate the workpiece 200, and the “time when the drill 300 works alone” refers to the time required for the drill 300 to drill through the workpiece 200 from the preset depth after the laser 100 is turned off after the drill 300 has been processed to a preset depth.

[0061] Among them, T=T2+T3, 2.5≤T2 / T3≤4, 1.5≤T1 / T3≤4, T2 / T3 is not limited to setting to 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.5, 3.6, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8.5, 9, 10, etc., and T1 / T3 is not limited to setting to 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, etc. In addition, the thickness of the workpiece 200 is defined as H, and the feed speed of the drill 300 during the drilling process is defined as f. The total time T required for the drill 300 to drill through the workpiece 200 is H / f, wherein 0.5T≤T1≤0.8T, 0.2T≤T3≤0.3T, T1 is not limited to being set to 0.5T, 0.6T, 0.7T, 0.75T, 0.8T, etc.; T3 is not limited to being set to 0.2T, 0.22T, 0.24T, 0.25T, 0.27T, 0.28T, 0.3T, etc.

[0062] Through the above arrangement, the workpiece 200 is irradiated with the laser for a sufficient time and can be fully preheated, thereby reducing the resistance of the drill 300 during processing, and the drill 300 will not be damaged due to thermal melting when processing to the corresponding depth of the workpiece 200 due to excessive preheating; at the same time, the laser 100 always keeps irradiating the workpiece 200 with laser before the drill 300 processes to the preset depth of the workpiece 200, and the workpiece 200 is continuously softened while being drilled, and the workpiece 200 can reach the softening plastic deformation temperature and will not melt. The drill 300 is subject to less resistance during the entire processing process, and the processing efficiency and processing quality are high. Finally, a through hole with a high-quality bushing can be formed, and excessive irradiation of the workpiece 200 by the laser 100 is avoided, which causes the drill 300 to be damaged due to thermal melting or irradiation by the laser 100.

[0063] In one embodiment, the ultrasonic amplitude of the drill 300 during processing is 0.1 μm-10 μm, so that the drill 300 has sufficient vibration amplitude for chip removal, and can avoid excessive vibration amplitude affecting the processing quality of drilling. The power of the laser 100 is set to 100W-500W to ensure that the laser 100 can quickly preheat and soften the workpiece 200, so that the laser 100 has sufficient processing efficiency, and avoids the material properties of the workpiece 200 being affected by the excessive power of the laser 100, or the formation of heat accumulation and damage to the tool. The rotation speed of the drill 300 is n=10r / min-10000r / min, so as to ensure the drilling efficiency of the drill 300, enable the drill 300 to process stably, and avoid the drill 300 breaking due to excessive rotation speed.

[0064] For example, for a titanium alloy part thicker than 2 mm, the diameter D of the drill 300 is set to 1.8 mm, the rotation speed of the drill 300 is 1800 r / min, the feed speed of the drill 300 is f=30 mm / min, and the processing flow is as follows: first, turn on the laser 100, and the laser 100 preheats the workpiece 200 for T1=1.2 s, then start the ultrasonic vibration module 500 and the drill 300, and the laser 100 and the drill 300 work simultaneously for T2=3.5 s, turn off the laser 100 T3 in advance, T3=0.5 s, and then the drill 300 continues processing for T3 time until the workpiece 200 is drilled through.

[0065] Alternatively, for a titanium alloy part thicker than 5 mm, the diameter D of the drill 300 is set to 1.8 mm, the rotation speed of the drill 300 is set to 1800 r / min, the feed speed of the drill 300 is f=30 mm / min, and the processing flow is as follows: first, turn on the laser 100, and the laser 100 preheats the workpiece 200 for T1=3 s, then start the ultrasonic vibration module 500 and the drill 300, and the laser 100 and the drill 300 work simultaneously for T2=9 s, turn off the laser 100 T3 in advance, T3=1 s, and then the drill 300 continues processing for T3 time until the workpiece 200 is drilled through.

[0066] It is understandable that the diameter, rotation speed, feed speed, T1, T2, T3, etc. of the drill 300 are reasonably selected according to the thickness of the workpiece 200 to be drilled (i.e., the drilling depth), so that the workpiece 200 has a higher processing efficiency, avoids tool damage, and extends the tool life.

[0067] The composite hot drilling method of the present invention further comprises the following steps:

[0068] The working parameters are obtained, and the working parameters include at least one of the rotation speed of the drill 300 at different time points, the power of the laser 100, and the opening time of the laser 100; after the drilling is completed, the image of the processed hole of the workpiece 200 is obtained, and the characteristic information of the processed hole is extracted, and the characteristic information includes at least one of the height and diameter of the processed hole; finally, a functional relationship between the characteristic information and the working parameters is established. Therefore, when processing the workpiece 200 with different processing requirements, the corresponding working parameters can be selected according to the functional relationship for processing, so as to improve the processing efficiency and processing quality of the workpiece 200 and extend the service life of the tool.

[0069] Reference Figure 4The present invention also provides a composite hot drilling system, which includes a workbench 400, a laser 100, a drill 300 and an ultrasonic vibration module 500. The workbench 400 is used to install and fix a workpiece 200 to be drilled. The installation and fixing method of the workpiece 200 to the workbench 400 is not limited to clamping, pressing, etc.; the laser 100 is located below the workbench 400, and the laser 100 can emit a laser beam to the workpiece 200 to soften the area to be drilled of the workpiece 200. The laser 100 is not limited to being set as a nanosecond laser 100, a picosecond laser 100, etc.; the drill 300 is located above the workbench 400, and the drill 300 can rotate and is used to drill the workpiece 200; the ultrasonic vibration module 500 is connected to the drill 300, and is used to provide ultrasonic vibration to the drill 300, so that the drill 300 keeps rotating and ultrasonically vibrating during the drilling process.

[0070] By first softening the area to be drilled of the workpiece 200, the resistance of drilling is reduced, the machinability of the workpiece 200 is improved, and the tool breakage caused by excessive resistance during drilling is avoided. In addition, since the laser 100 and the drill 300 are respectively located on the upper and lower sides of the workpiece 200, the laser 100 irradiates the area to be drilled of the workpiece 200 from bottom to top, and the drill 300 drills the workpiece 200 from top to bottom, when the laser 100 irradiates the laser beam to the workpiece 200, the drill 300 avoids the laser beam, and the laser beam does not irradiate the drill 300, which can reduce the impact of laser irradiation on the drill 300 and extend the service life of the drill 300.

[0071] The ultrasonic vibration module 500 can be arranged above the workpiece 200 and connected to the workpiece 200. The ultrasonic vibration module 500 includes a power supply unit 510 and an ultrasonic tool handle 520. The power supply unit 510 is connected to an external ultrasonic power supply 600. The ultrasonic tool handle 520 is connected to the drill 300. After the power supply unit 510 is powered on, the ultrasonic tool handle 520 drives the drill 300 to generate ultrasonic vibration. The drill 300 is also connected to a driving component, which is used to drive the drill 300 to rotate. In addition, the drill 300 and the ultrasonic vibration module 500 can be installed on the machine tool spindle 700 as a combined structure. The machine tool spindle 700 is configured to drive the drill 300 to translate and / or lift, so as to drive the drill 300 to translate, so that the drill 300 drills different positions of the workpiece 200, and drives the drill 300 to feed during the drilling process.

[0072] In addition, the composite hot drilling system also includes a control unit, which can be configured to control the feeding timing of the drill 300, the feeding speed of the drill 300, the rotation speed of the drill 300, the opening and closing of the laser 100, the power of the laser 100, the amplitude of the ultrasonic vibration module 500, etc., so as to adjust the processing parameters of the drill 300 and the laser 100 in real time according to the actual processing conditions during the processing.

[0073] Specifically, the composite hot drilling system also includes a data acquisition module, an image acquisition module, an image processing module and a data analysis module; the data acquisition module is used to obtain the working parameters of the drill 300 and the laser 100, and the working parameters include at least one of the rotation speed of the drill 300 at different time points, the power of the laser 100, and the start time of the laser 100; the data acquisition module is not limited to being set as a rotation speed sensor, a thermal optical power meter, a radiation power meter, a timer, etc.

[0074] The image acquisition module is used to obtain the image of the processed hole of the workpiece 200 after drilling. The image processing module extracts the characteristic information of the processed hole according to the image, and the characteristic information includes at least one of the height and the diameter. The image processing module is not limited to being set as a CCD camera, a CMOS camera, etc. The data analysis module is used to establish a functional relationship between the characteristic information and the working parameters. The data analysis module can use data analysis software to perform data analysis and curve fitting. The data analysis module can be integrated into the control module.

[0075] In addition, the composite hot drilling processing system may also include a distance measuring module, which may be set as a distance measuring sensor. The distance measuring module is used to measure the distance between the drill 300 and the surface of the workpiece 200. The distance measuring module may be connected to the control module for communication. The control module may control the movement of the drill 300 through the measurement data of the distance measuring module, and adjust the distance between the drill 300 and the workpiece 200.

[0076] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A composite hot drilling method, characterized in that: include: The laser is located below the workpiece, and the drill is located above the workpiece; The laser is controlled to irradiate a laser beam to a position of a workpiece to be drilled, so as to preheat the workpiece. After the workpiece is preheated, the ultrasonic vibration module controls the drill to perform ultrasonic vibration and rotation, so that the drill drills the workpiece.

2. The composite hot drilling method according to claim 1, characterized in that: After the preheating of the workpiece is completed, the laser is kept irradiating the workpiece so that the drill continues to drill the workpiece.

3. The composite hot drilling method according to claim 1, characterized in that: After the workpiece is preheated, the laser is turned off, and the drill continues to drill the workpiece until the workpiece is penetrated.

4. The composite hot drilling method according to claim 2, characterized in that: When the drill reaches a preset depth, the laser is turned off, so that the drill continues to drill the workpiece until the workpiece is penetrated; Alternatively, after the drill drills to a preset depth, the power of the laser is continuously reduced until the drill drills through the workpiece.

5. The composite hot drilling method according to claim 1, characterized in that: The diameter of the laser beam spot of the laser is R1, the diameter of the hole to be drilled in the workpiece is R2, and R2<R1<2R2; And / or, the central axis of the laser beam is coaxial with the central axis of the hole to be drilled in the workpiece; And / or, the laser beam is irradiated perpendicularly to the surface of the workpiece.

6. The composite hot drilling method according to claim 1, characterized in that: The ultrasonic amplitude of the drill is 0.1 μm-10 μm; And / or, the power of the laser is 100W-500W; And / or, the distance between the upper end of the laser and the lower end of the workpiece is 20-100 mm.

7. The composite hot drilling method according to claim 3, characterized in that: The total working time of the drill is T, the time for the laser to preheat the workpiece is T1, the time for the drill and the laser to work simultaneously is T2, and the time for the drill to work alone is T3, wherein T=T2+T3, 2.5≤T2 / T3≤10, 1.5≤T1 / T3≤4.

8. The composite hot drilling method according to claim 1, characterized in that: The method further includes acquiring working parameters, wherein the working parameters include at least one of the rotation speed of the drill, the power of the laser, and the start time of the laser at different time points; Acquire an image of a processed hole after drilling of the workpiece, and extract feature information of the processed hole, wherein the feature information includes at least one of a height and a diameter of the processed hole; A functional relationship between the characteristic information and the operating parameters is established.

9. Composite hot drilling system, characterized in that: include: A workbench, used to mount and fix the workpiece to be drilled; A laser is located below the workbench, and the laser can emit a laser beam to the workpiece; A drill, located above the workbench, capable of rotating and drilling a workpiece; The ultrasonic vibration module is connected to the drill and is used to provide ultrasonic vibration to the drill.

10. The composite hot drilling system according to claim 9, characterized in that: The composite hot drilling system also includes a data acquisition module, an image acquisition module, an image processing module and a data analysis module; The data acquisition module is used to acquire the working parameters of the drill and the laser, wherein the working parameters include at least one of the rotation speed of the drill at different time points, the power of the laser, and the start time of the laser; The image acquisition module is used to obtain an image of a processed hole after the workpiece is drilled, and the image processing module extracts feature information of the processed hole based on the image, wherein the feature information includes at least one of a height and a diameter; The data analysis module is used to establish a functional relationship between the characteristic information and the working parameters.

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