Variable-amplitude processing system and method for SiCf / SiC composite material

Abstract

The invention relates to the technical field of composite material machining, in particular to a variable-amplitude machining system and method for a SiCf / SiC composite material, and the variable-amplitude machining system for the SiCf / SiC composite material comprises a machine tool, an ultrasonic transducer capable of adjusting the amplitude and a tool; the machine tool is used for clamping a target workpiece; the ultrasonic transducer is mounted on a main shaft of the machine tool and stably rotates along with the main shaft; the cutter is installed on the ultrasonic transducer and used for machining the target workpiece in the set feeding direction; the ultrasonic transducer is used for changing the ultrasonic amplitude according to different machining positions in the machining process. According to the method, the amplitude can be adjusted in the machining process of the SiCf / SiC composite material according to different texture characteristics shown by different positions of the SiCf / SiC composite material, so that machining damage is reduced, the machining quality is guaranteed, and the good machining effect is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of composite material processing, and particularly relates to a SiC f / SiC composite material variable-amplitude processing system and method. BACKGROUND

[0002] SiC f / SiC composite materials have been widely used in the field of aerospace due to their high strength, wear resistance and other characteristics. However, SiC f / SiC composite materials have poor processing performance in the processing process due to their anisotropy and heterogeneity, which further leads to various processing defects of SiC f / SiC composite materials in the processing process, which seriously affects the processing quality of the materials, and therefore, the processing technology of SiC f / SiC composite materials must be improved to achieve better processing results.

[0003] At present, the existing ultrasonic auxiliary processing technology mainly sets the ultrasonic amplitude to a fixed value to process the composite materials. However, SiC f / SiC composite materials are heterogeneous materials, which leads to the fact that the fixed amplitude may lead to worse processing results for a certain part in the processing area. Therefore, it is very important to dynamically change the ultrasonic amplitude to adapt to the heterogeneous characteristics of SiC f / SiC composite materials to achieve good processing results. SUMMARY

[0004] The application provides a SiC f / SiC composite material variable-amplitude processing system and method, which can dynamically control the ultrasonic amplitude and change the ultrasonic amplitude according to different processing positions in the processing process to obtain better processing surface quality.

[0005] In a first aspect, the application provides a SiC f / SiC composite material variable-amplitude processing system, which comprises a machine tool, an ultrasonic transducer with adjustable amplitude and a tool. The machine tool is used for clamping a target workpiece. The ultrasonic transducer is installed on the main shaft of the machine tool and stably rotates with the main shaft. The tool is installed on the ultrasonic transducer and is used for processing the target workpiece along the set feeding direction. The ultrasonic transducer is used for changing the ultrasonic amplitude according to different processing positions in the processing process.

[0006] Further, the ultrasonic transducer comprises a connecting end. The connecting end is used for connecting with the main shaft of the machine tool and stably rotating the ultrasonic transducer with the main shaft.

[0007] Further, the ultrasonic transducer further comprises an ultrasonic vibration module; the ultrasonic vibration module contains a piezoelectric ceramic therein, which is used to convert electric energy into mechanical energy, thereby realizing ultrasonic vibration.

[0008] Further, the ultrasonic transducer further comprises a vibration adjusting module; the vibration adjusting module is connected with the piezoelectric ceramic, and is used to detect the material texture of the region to be processed, and make the ultrasonic vibration module adjust the ultrasonic amplitude according to the detection result.

[0009] Further, the vibration adjusting module emits a magnetic field signal to detect the material texture of the region to be processed, and receives the returned magnetic field signal.

[0010] Further, the ultrasonic vibration module adjusts the conversion of the piezoelectric ceramic to electric energy according to the detection result of the vibration adjusting module, thereby changing the output amplitude.

[0011] Further, the ultrasonic transducer further comprises a mounting end, which is used to mount a tool.

[0012] Further, the diameter of the tool mounted on the mounting end ranges from 4mm to 12mm.

[0013] In a second aspect, the application provides a SiC f / SiC composite material variable-amplitude processing method, which is realized by the SiC f / SiC composite material variable-amplitude processing system as described above. The SiC f / SiC composite material variable-amplitude processing method comprises the following steps: Clamp the target workpiece on a machine tool, and then mount a tool on the ultrasonic transducer, and finally mount the ultrasonic transducer on the main shaft of the machine tool; Determine the feature to be processed of the target workpiece, plan the motion trajectory of the tool, and set the machine tool running program and processing parameters; Detect the material texture of the region to be processed by using the ultrasonic transducer, and adjust the ultrasonic amplitude according to the detection result, so as to process the target workpiece by using the tool.

[0014] Further, the processing parameters include: the main shaft speed is 20000rpm~30000rpm, the feed rate is 20mm / min~60mm / min, and the cutting depth is 0.5mm~1mm.

[0015] The above technical solutions of the application have the following advantages: The SiC fThe SiC composite material variable amplitude machining system and method, by installing the ultrasonic transducer on the spindle of the machine tool, and rotating with the spindle stably; the cutter is installed on the ultrasonic transducer to process the target workpiece along the set feeding direction, and the ultrasonic transducer changes the ultrasonic amplitude in the processing process according to the different processing positions, and the SiC f In the SiC composite material machining, due to the heterogeneous and anisotropic characteristics, the ultrasonic amplitude is dynamically adjusted in the processing to achieve good machining effect. By designing the ultrasonic transducer with adjustable amplitude, according to the different texture characteristics of SiC f The different texture characteristics of SiC composite material at different positions in SiC f The amplitude is adjusted in the SiC composite material machining process, to reduce the processing damage and ensure the processing quality, so as to achieve good machining effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 The structure diagram of the ultrasonic transducer provided by the embodiment of the present application; Figure 2 The SiC f Flow chart of SiC composite material variable amplitude machining method.

[0018] Reference numerals: 1, connecting end; 2, ultrasonic vibration module; 3, vibration adjusting module; 4, mounting end. EMBODIMENTS

[0019] In the following description, specific details are set forth such as specific system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it should be apparent to those skilled in the art that the present application can be practiced in other embodiments without these specific details. In other cases, well-known systems, devices, circuits and process methods have been omitted or simplified in order not to obscure the description of the present application with unnecessary details.

[0020] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0021] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are used only to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0022] In the present application, the reference to "one embodiment" or "some embodiments" means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in the present specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized. "Multiple" means "two or more".

[0023] The specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0024] The embodiments of the present application provide a SiC f / SiC composite material variable amplitude processing system, comprising a machine tool, an adjustable amplitude ultrasonic transducer, a tool; the machine tool is used for clamping a target workpiece; the ultrasonic transducer is installed on the main shaft of the machine tool and rotates stably with the main shaft; the tool is installed on the ultrasonic transducer and used for processing the target workpiece along the set feed direction; the ultrasonic transducer is used for changing the ultrasonic amplitude according to different processing positions during processing.

[0025] The adjustable amplitude ultrasonic transducer can dynamically change the ultrasonic amplitude during the ultrasonic assisted processing of SiCf / SiC composite material. The ultrasonic transducer can be stably connected with the main shaft of the machine tool and rotates stably with the main shaft. The ultrasonic transducer can fix the tool required for processing, and can clamp the tool with a diameter ranging from 4mm to 12mm. The ultrasonic transducer has a special module that can detect the internal structure of the material and adjust the ultrasonic amplitude according to the detection results. The ultrasonic transducer can emit special magnetic field signals to detect the internal structure of the material, and can receive the transmitted magnetic field signals.

[0026] In some embodiments, the ultrasonic transducer comprises a connecting end; the connecting end is used for connecting with the main shaft of the machine tool and making the ultrasonic transducer rotate stably with the main shaft.

[0027] In some embodiments, the ultrasonic transducer further comprises an ultrasonic vibration module; the ultrasonic vibration module contains a piezoelectric ceramic therein, which is used to convert electric energy into mechanical energy, thereby realizing ultrasonic vibration.

[0028] In some embodiments, the ultrasonic transducer further comprises a vibration adjustment module; the vibration adjustment module is connected with the piezoelectric ceramic, which is used to detect the material texture of the region to be processed, and make the ultrasonic vibration module adjust the ultrasonic amplitude according to the detection result.

[0029] In some embodiments, the vibration adjustment module emits a magnetic field signal to detect the material texture of the region to be processed, and receives the returned magnetic field signal.

[0030] In some embodiments, the ultrasonic vibration module adjusts the conversion of the piezoelectric ceramic to electric energy according to the detection result of the vibration adjustment module, thereby changing the output amplitude.

[0031] In some embodiments, the ultrasonic transducer further comprises a mounting end, which is used to mount a tool.

[0032] In some embodiments, the diameter of the tool mounted by the mounting end ranges from 4mm to 12mm.

[0033] As shown in Figure 1 Fig. 1, the structure schematic diagram of the ultrasonic transducer capable of realizing ultrasonic amplitude change provided by the embodiments of the present application. The lathe main shaft and the ultrasonic transducer are stably connected through the connecting end 1 by the lathe air pressure device, and rotate with the lathe main shaft. The ultrasonic vibration module 2 contains piezoelectric ceramics capable of generating vibration effect. The piezoelectric ceramics convert electric energy into mechanical energy, thereby realizing ultrasonic vibration. The vibration adjustment module 3 detects the material texture of the region to be processed before the machining tool or the grinding wheel, and then connects with the piezoelectric ceramics in the ultrasonic vibration module 2, and adjusts the conversion of the piezoelectric ceramics to electric energy, thereby changing the output amplitude of the piezoelectric ceramics. The mounting end 4 can mount the machining tool or the small grinding wheel required in the machining process, and can keep it stable and not fall off during the machining process.

[0034] The embodiments of the present application also provide a SiC f / SiC composite material variable amplitude machining method, which is realized by the SiC f / SiC composite material variable amplitude machining system as described above; the SiC fThe variable amplitude machining method of the / SiC composite material comprises the following steps: clamping a target workpiece on a machine tool, and installing a tool on an ultrasonic transducer, and then installing the ultrasonic transducer on a spindle of the machine tool; determining a feature to be machined of the target workpiece, planning a motion track of the tool, and setting a machine tool running program and machining parameters; detecting material texture of a region to be machined by using the ultrasonic transducer, and adjusting an ultrasonic amplitude according to a detection result, so that the tool machines the target workpiece.

[0035] In some embodiments, the machining parameters comprise: The spindle speed is 20000 rpm~30000 rpm, the feed amount is 20 mm / min~60 mm / min, and the cutting depth is 0.5 mm~1 mm.

[0036] Figure 2 The SiC f A variable amplitude machining process flow chart of the / SiC composite material.

[0037] Step one, installing a clamp on a machine tool platform, and clamping a SiC f The / SiC composite material workpiece is fixed on the clamp, and a leveling device is used to adjust the clamp to be horizontal; a machining tool needed in the machining process is installed on a mounting end of an ultrasonic transducer, and it is determined that the ultrasonic transducer is in a good clamping state.

[0038] Step two, connecting the ultrasonic transducer installed with the machining tool with the spindle of the machine tool through a connecting end, and ensuring that the ultrasonic transducer can rotate well while being stably connected by manual rotation; starting an ultrasonic power supply, and placing a metal vibration piece under the ultrasonic transducer which is not rotating and in contact with the machining tool, to detect whether the machining tool vibrates, and if a high-frequency vibration sound of metal is heard, it is proved that the ultrasonic power supply is normally running.

[0039] Step three, determining a feature to be machined of the workpiece, planning a motion track of the machining tool, and setting a machine tool running program, because the / SiC composite material f The / SiC composite material has a hard and brittle characteristic, and a larger spindle speed and a smaller feed speed, and a smaller cutting depth are usually selected in the machining process.

[0040] In the machining process, the machining parameters are usually as follows: the spindle speed is 20000 rpm~30000 rpm, the feed amount is 20 mm / min~60 mm / min, and the cutting depth is 0.5 mm~1 mm. In the parameter range, appropriate parameters are selected to set a machine tool program.

[0041] Step four, before the experiment, first start the vibration adjustment module to run, then run the machine tool program set in step three, the vibration adjustment module can detect the tool before the workpiece to be processed area, so as to adjust the ultrasonic amplitude according to the different texture of different processing position of workpiece, get good processing characteristics.

[0042] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. In addition, the specific name of each functional unit and module is only for easy distinction, and does not limit the protection scope of the application.

[0043] It should be clear that each embodiment in the specification is described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other, and each embodiment focuses on the difference from other embodiments. The present application is not limited to the specific structure described above and shown in the drawings. Moreover, for the sake of brevity, detailed description of known methods and techniques is omitted.

[0044] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A SiC f The SiC composite material variable amplitude processing system is characterized by... The device includes a machine tool, an adjustable-amplitude ultrasonic transducer, and a cutting tool; the machine tool is used to clamp the target workpiece; the ultrasonic transducer is mounted on the spindle of the machine tool and rotates stably with the spindle; the cutting tool is mounted on the ultrasonic transducer and is used to process the target workpiece along a set feed direction; the ultrasonic transducer is used to change the ultrasonic amplitude according to different processing positions during the processing.

2. The SiC as described in claim 1 f The SiC composite material variable amplitude processing system is characterized by... The ultrasonic transducer includes a connecting end; the connecting end is used to connect to the spindle of the machine tool and to make the ultrasonic transducer rotate stably with the spindle.

3. The SiC as described in claim 1 f The SiC composite material variable amplitude processing system is characterized by... The ultrasonic transducer also includes an ultrasonic vibration module; the ultrasonic vibration module contains piezoelectric ceramics, which are used to convert electrical energy into mechanical energy, thereby realizing ultrasonic vibration.

4. The SiC as described in claim 3 f The SiC composite material variable amplitude processing system is characterized by... The ultrasonic transducer also includes a vibration adjustment module; the vibration adjustment module is connected to the piezoelectric ceramic and is used to detect the material texture of the area to be processed, and to adjust the ultrasonic amplitude of the ultrasonic vibration module according to the detection results.

5. The SiC as described in claim 4 f The SiC composite material variable amplitude processing system is characterized by... The vibration adjustment module emits a magnetic field signal to detect the material texture of the area to be processed and receives the returned magnetic field signal.

6. The SiC as described in claim 4 f The SiC composite material variable amplitude processing system is characterized by... The ultrasonic vibration module adjusts the piezoelectric ceramic's conversion of electrical energy based on the detection results of the vibration adjustment module, thereby changing the output amplitude.

7. The SiC as described in claim 1 f The SiC composite material variable amplitude processing system is characterized by... The ultrasonic transducer also includes a mounting end for mounting a cutting tool.

8. The SiC as described in claim 7 f The SiC composite material variable amplitude processing system is characterized by... The diameter of the tool mounted on the mounting end ranges from 4 mm to 12 mm.

9. A SiC f The variable amplitude processing method for SiC composite materials is characterized by... SiC as described in any one of claims 1 to 8 f A variable amplitude processing system for SiC composite materials has been implemented. The SiC f The variable amplitude processing methods for SiC composite materials include: The target workpiece is clamped on the machine tool, and the cutting tool is installed on the ultrasonic transducer. Then the ultrasonic transducer is installed on the spindle of the machine tool. Determine the features to be processed of the target workpiece, plan the motion trajectory of the cutting tool, and set the machine tool operation program and processing parameters; The ultrasonic transducer is used to detect the material texture of the area to be processed, and the ultrasonic amplitude is adjusted according to the detection results so that the cutting tool can process the target workpiece.

10. The SiC as described in claim 9 f The variable amplitude processing method for SiC composite materials is characterized by... The machining parameters include: spindle speed 20000rpm~30000rpm, feed rate 20mm / min~60mm / min, and depth of cut 0.5mm~1mm.

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