Ultrasonic combined machining system and ultrasonic machining method

Abstract

The invention discloses an ultrasonic combined machining system and an ultrasonic machining method.The ultrasonic combined machining system comprises a tool combination assembly, a tool rest is used for being connected with a spindle of a numerical control lathe, and the tool combination assembly comprises the tool rest, an ultrasonic turning tool assembly and an ultrasonic surface strengthening assembly; the tool rest is provided with a first installation position used for installing an ultrasonic turning tool assembly, a second installation position used for installing an ultrasonic surface strengthening assembly, and a first power interface electrically connected with the first installation position and used for being electrically connected with an ultrasonic power generator. The second power interface is electrically connected with the second mounting position and is used for being electrically connected with an ultrasonic power generator; the gas path interface is communicated with the second mounting position and is used for being connected with a gas source; and a preset axial distance is formed between the output end of the ultrasonic turning tool assembly mounted at the first mounting position and the output end of the ultrasonic surface strengthening assembly mounted at the second mounting position. While ultrasonic turning forming machining is achieved, strengthening machining of the surface of the part is achieved through ultrasonic surface strengthening.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, and in particular, to an ultrasonic composite processing system. In addition, the present invention also relates to an ultrasonic processing method including the ultrasonic composite processing system. Background Art

[0002] Turning is a widely used and economical machining technology in the machining industry. However, for difficult-to-machine materials with characteristics such as high strength, high plasticity, high cutting resistance, low thermal conductivity, and severe cold work hardening, traditional turning can no longer meet their machining requirements due to their poor machinability. Therefore, in the high-precision and mirror-finishing process of difficult-to-machine metal materials such as ultra-high-strength steel, special tools are often used to perform "rough turning-semi-finishing turning-finishing turning-super-finishing turning" on the surface of metal parts, and then the surface is treated through multiple grinding and polishing processes to finally meet the design requirements. The entire process involves multiple processes, multiple processing tools, and multiple clamping and alignment, which undoubtedly prolongs the processing process of parts, resulting in reduced production efficiency and high processing costs. The multi-process process increases the risk of errors in processing and measurement, making it difficult to accurately guarantee the processing accuracy. Summary of the invention

[0003] The present invention provides an ultrasonic composite machining system and an ultrasonic machining method to solve the technical problems of long process, low production efficiency, high machining cost and difficulty in ensuring machining accuracy of high-precision and mirror-surface machining of difficult-to-machine metal rings such as high-strength steel.

[0004] According to one aspect of the present invention, there is provided an ultrasonic composite machining system, which is applied to a numerically controlled lathe. The ultrasonic composite machining system comprises a tool assembly assembly, which comprises a tool holder, an ultrasonic turning tool assembly and an ultrasonic surface strengthening assembly. The tool holder is used to be connected to the spindle of the numerically controlled lathe; the tool holder is provided with a first mounting position for mounting the ultrasonic turning tool assembly, a second mounting position for mounting the ultrasonic surface strengthening assembly, a first power interface electrically connected to the first mounting position and used to be electrically connected to the ultrasonic power generator, a second power interface electrically connected to the second mounting position and used to be electrically connected to the ultrasonic power generator, and an air path interface connected to the second mounting position and used to be connected to an air source; the first mounting position and the second mounting position have a preset height difference and / or the first mounting position and the second mounting position have a preset depth difference and / or the output end of the ultrasonic turning tool assembly mounted at the first mounting position and the output end of the ultrasonic surface strengthening assembly mounted at the second mounting position have a preset axial spacing.

[0005] As a further improvement of the above technical solution, the ultrasonic turning tool assembly includes a turning tool blade and an ultrasonic turning tool handle for mounting the turning tool blade. The ultrasonic turning tool handle is also used to be installed in the first mounting position, and a first locking mechanism for fixing the ultrasonic turning tool handle in the first mounting position is provided on one side of the tool holder.

[0006] As a further improvement of the above technical solution, the ultrasonic surface strengthening component includes a strengthening tool head and an ultrasonic surface strengthening tool handle for installing the strengthening tool head. The ultrasonic surface strengthening tool handle is also used to be installed in the second mounting position, and a second locking mechanism for fixing the ultrasonic surface strengthening tool handle in the second mounting position is provided on one side of the tool holder.

[0007] As a further improvement of the above technical solution, the output end of the reinforcing tool head is square, spherical or cylindrical.

[0008] As a further improvement of the above technical solution, a guide plate is arranged between the first mounting position and the second mounting position for guiding the iron chips generated during the process of machining the workpiece by the ultrasonic turning tool assembly to move in a direction away from the ultrasonic surface strengthening assembly.

[0009] As a further improvement of the above technical solution, the ultrasonic composite machining system further includes an air pressure regulating device, and the air pressure regulating device is connected to the air source and the air path interface through air path pipelines respectively.

[0010] As a further improvement of the above technical solution, a clamping structure for cooperating with a chuck of a spindle of the CNC lathe is provided on one side of the tool holder.

[0011] As a further improvement of the above technical solution, the CNC lathe includes a first spindle and a second spindle, and the ultrasonic composite machining system is provided with at least two groups of tool holders, each group of tool holders includes at least two tool holders; the clamping structure of the first group of tool holders is arranged on one side of the tool holder and is parallel to the distribution direction from the first installation position to the second installation position; the clamping structure of the second group of tool holders is arranged on one side of the tool holder and is perpendicular to the distribution direction from the first installation position to the second installation position, the clamping structure of at least one of the tool holders in the second group is located on the side close to the first installation position, and the clamping structure of at least one of the tool holders in the second group is located on the side close to the second installation position.

[0012] According to another aspect of the present invention, there is also provided an ultrasonic machining method, which includes the above ultrasonic composite machining system, and the machining method includes:

[0013] S1. Clamp the workpiece on the CNC lathe;

[0014] S2. The ultrasonic turning tool assembly is installed in the first mounting position, the ultrasonic surface strengthening assembly is installed in the second mounting position, and the tool holder is installed on the CNC lathe;

[0015] S3. Tool setting;

[0016] S4. The tool holder is connected to the ultrasonic power generator and the air source, and the ultrasonic frequency and amplitude are adjusted to the preset parameters respectively;

[0017] S5. Start the CNC lathe and start processing.

[0018] As a further improvement of the above technical solution, the CNC lathe includes a first spindle and a second spindle, and the first spindle and the second spindle are respectively provided with the tool holder, and step S5 includes: the first spindle controls the corresponding tool holder to process the workpiece from top to bottom to a preset height position, and the second spindle controls the corresponding tool holder to process the workpiece from bottom to top to a preset height position.

[0019] The present invention has the following beneficial effects:

[0020] This ultrasonic composite machining system is applied to CNC lathes. The tool assembly assembly includes a tool holder, an ultrasonic turning tool assembly and an ultrasonic surface strengthening assembly. The tool holder is used to connect with the spindle of the CNC lathe. During turning, the tool holder introduces high-frequency, low-amplitude ultrasonic vibrations through an ultrasonic power generator, and removes materials through the ultrasonic turning tool assembly under mechanical cutting and high-frequency micro-impact. Compared with the traditional turning material removal mechanism, it can destroy the material boundary from multiple directions and angles, which helps the cutting edge to cut into the material, effectively reduces the friction effect between the tool and the part, makes it easier to remove materials and ensure the stability of the machining process, reduces cutting resistance and cutting temperature, improves the cooling effect of the coolant, reduces tool wear, thereby reducing turning tool marks and improving surface roughness; at the same time, the tool holder introduces high-frequency, low-amplitude ultrasonic vibrations through an ultrasonic power generator, vibrates and impacts the surface of the workpiece, causes a certain plastic deformation on the surface of the part to achieve the purpose of strengthening the surface performance of the part, and improves the microhardness by strengthening the metallographic structure of the metal plate surface. , surface roughness and residual stress, and effectively improve fatigue life; the tool combination component combines an ultrasonic turning tool component and an ultrasonic surface strengthening component, and based on this, ultrasonic turning and ultrasonic surface strengthening are integrated into the same process. The output ends of the two after installation are controlled by structural design to have a certain axial spacing, so that the ultrasonic composite processing system first completes ultrasonic turning and then performs ultrasonic surface strengthening when processing the workpiece. While realizing ultrasonic turning forming processing, ultrasonic surface strengthening is used to realize the strengthening processing of the part surface, so that the vibration of ultrasonic surface strengthening impacts the top position of the turning tool mark, and the tensile stress on the surface of the part after turning is converted into compressive stress. Compared with the ultrasonic turning process and then the ultrasonic surface strengthening process, it is more effective to improve the dimensional accuracy of the processed parts, improve the surface roughness to achieve a mirror effect, and save multiple parts clamping and data measurement steps between different processes, avoid the problem of reduced processing accuracy caused by repeated positioning, greatly improve processing efficiency and quality, reduce labor intensity, meet processing requirements while ensuring low processing costs.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 is a schematic diagram of an application scenario of a preferred embodiment of the present invention;

[0024] Figure 2The structure of the tool assembly of the preferred embodiment of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 3 The structure of the tool assembly of the preferred embodiment of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 4 It is a structural schematic diagram of the installation state of the tool assembly assembly of the preferred embodiment of the present invention;

[0027] Figure 5 It is a structural schematic diagram of a vertically arranged tool assembly assembly according to an embodiment of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the installation state of a vertically arranged tool assembly according to an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a reinforced tool head according to a preferred embodiment of the present invention;

[0030] Figure 8 is a schematic structural diagram of a reinforced tool head according to a preferred embodiment of the present invention;

[0031] Fig. 9 It is a schematic cross-sectional view of several annular workpieces adapted according to an embodiment of the present invention.

[0032] Legend:

[0033] 101. ultrasonic power generator; 102. ultrasonic turning tool holder; 1021. first power interface; 103. connecting cable; 104. turning blade; 201. ultrasonic surface strengthening tool holder; 2011. second power interface; 2012. air circuit interface; 202. strengthening tool head; 203. air pressure regulating device; 204. air pressure pipeline; 301. tool holder; 302. guide plate; 303. locking screw; 400. CNC lathe; 401. first spindle; 402. second spindle. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0035] Figure 1 is a schematic diagram of an application scenario of a preferred embodiment of the present invention; Figure 2 The structure of the tool assembly of the preferred embodiment of the present invention is shown in FIG. Figure 1 ; Figure 3 The structure of the tool assembly of the preferred embodiment of the present invention is shown in FIG. Figure 2 ; Figure 4It is a structural schematic diagram of the installation state of the tool assembly assembly of the preferred embodiment of the present invention; Figure 5 It is a structural schematic diagram of a vertically arranged tool assembly assembly according to an embodiment of the present invention; Figure 6 It is a structural schematic diagram of the installation state of a vertically arranged tool assembly according to an embodiment of the present invention; Figure 7 is a schematic structural diagram of a reinforced tool head according to a preferred embodiment of the present invention; Figure 8 is a schematic structural diagram of a reinforced tool head according to a preferred embodiment of the present invention; Fig. 9 It is a schematic cross-sectional view of several annular workpieces adapted according to an embodiment of the present invention.

[0036] like Figures 1 to 8 As shown, the ultrasonic composite machining system of this embodiment is applied to a CNC lathe 400. The ultrasonic composite machining system includes a tool assembly assembly. The tool holder 301 is used to connect to the spindle of the CNC lathe 400. The tool assembly assembly includes a tool holder 301, an ultrasonic turning tool assembly and an ultrasonic surface strengthening assembly. The tool holder 301 is provided with a first mounting position for installing the ultrasonic turning tool assembly, a second mounting position for installing the ultrasonic surface strengthening assembly, a first power interface 1021 electrically connected to the first mounting position and used to be electrically connected to the ultrasonic power generator 101, a second power interface 2011 electrically connected to the second mounting position and used to be electrically connected to the ultrasonic power generator 101, and an air path interface 2012 connected to the second mounting position and used to be connected to the air source; the first mounting position and the second mounting position have a preset height difference and / or the first mounting position and the second mounting position have a preset depth difference and / or the output end of the ultrasonic turning tool assembly installed at the first mounting position and the output end of the ultrasonic surface strengthening assembly installed at the second mounting position have a preset axial spacing.

[0037] It can be understood that the ultrasonic composite machining system is applied to a CNC lathe 400, and the tool assembly assembly includes a tool holder 301, an ultrasonic turning tool assembly and an ultrasonic surface strengthening assembly. The tool holder 301 is used to connect with the spindle of the CNC lathe 400. During turning, the tool holder 301 introduces high-frequency, low-amplitude ultrasonic vibrations through the ultrasonic power generator 101, and the ultrasonic turning tool assembly removes materials under mechanical cutting and high-frequency micro-impact. Compared with the traditional turning material removal mechanism, the material boundary can be destroyed from multiple directions and angles, which helps the cutting edge to cut into the material, effectively reduces the friction effect between the tool and the part, makes it easier to remove materials and ensure the stability of the machining process, reduces cutting resistance and cutting temperature, improves the cooling effect of the coolant, reduces tool wear, thereby reducing turning tool marks and improving surface roughness; at the same time, the tool holder 301 introduces high-frequency, low-amplitude ultrasonic vibrations through the ultrasonic power generator 101, vibrates and impacts the surface of the workpiece, causes a certain plastic deformation on the surface of the part to achieve the purpose of strengthening the surface performance of the part, and strengthens the surface of the metal sheet. The metallographic structure organization can achieve the purpose of improving microhardness, surface roughness and residual stress, and effectively improve fatigue life; the tool combination component combines the ultrasonic turning tool component and the ultrasonic surface strengthening component, based on which ultrasonic turning and ultrasonic surface strengthening are integrated into the same process, and the output ends of the two after installation are controlled by structural design to have a certain axial spacing, so that the ultrasonic composite processing system first completes ultrasonic turning and then performs ultrasonic surface strengthening when processing the workpiece, and while realizing ultrasonic turning forming processing, ultrasonic surface strengthening is used to realize the strengthening processing of the part surface, so that the vibration of ultrasonic surface strengthening impacts the top position of the turning tool mark, and the tensile stress on the surface of the part after turning is converted into compressive stress. Compared with the ultrasonic turning process and then the ultrasonic surface strengthening process, it is more effective to improve the dimensional accuracy of the processed parts, improve the surface roughness to achieve a mirror effect, and save multiple parts clamping and data measurement steps between different processes, avoid the problem of reduced processing accuracy caused by repeated positioning, greatly improve processing efficiency and quality, reduce labor intensity, meet processing requirements while ensuring low processing costs.

[0038] In some embodiments, reference Figures 1 to 4The ultrasonic turning tool assembly includes a turning blade 104 and an ultrasonic turning tool handle 102 for mounting the turning blade 104. The ultrasonic turning tool handle 102 is also used to be mounted in the first mounting position. One side of the tool holder 301 is provided with a first locking mechanism for fixing the ultrasonic turning tool handle 102 in the first mounting position. The ultrasonic surface strengthening assembly includes a strengthening tool head 202 and an ultrasonic surface strengthening tool handle 201 for mounting the strengthening tool head 202. The ultrasonic surface strengthening tool handle 201 is also used to be mounted in the second mounting position. One side of the tool holder 301 is provided with a first locking mechanism for fixing the ultrasonic surface strengthening tool handle 102 in the first mounting position. The tool handle 201 is fixed to the second locking mechanism of the second installation position. Specifically, after the turning blade 104 is installed into the ultrasonic turning tool handle 102 and the strengthening tool head 202 is installed into the ultrasonic surface strengthening tool handle 201, the ultrasonic turning tool handle 102 is installed into the first installation position and the ultrasonic surface strengthening tool handle 201 is installed into the second installation position. The relative positions of the ultrasonic turning tool handle 102 and the ultrasonic surface strengthening tool handle 201 in the output direction are adjusted to align the tools on the workpiece. The ultrasonic turning tool handle 102 is locked in the first installation position by the first locking mechanism, and the ultrasonic surface strengthening tool handle 201 is locked by the second locking mechanism. The tool holder 201 is in the second installation position, and the tool holder 301 is installed on the spindle of the lathe to complete the installation of the tool assembly assembly; preferably, the first locking mechanism and the second locking mechanism are both locking screws 303 threadedly connected to the tool holder 301, and the threaded holes on the tool holder 301 for setting the locking screws 303 are respectively connected to the corresponding installation positions, and the ultrasonic turning tool holder 102 and the ultrasonic surface strengthening tool holder 201 are adjusted, and the locking screws 303 are tightened by the tool to press against the corresponding tool holder to complete the fixation; preferably, the turning blade 104 and the ultrasonic turning tool holder 102 and the strengthening tool holder 201 are fixed. A quick-change structure is respectively used between the tool head 202 and the ultrasonic surface strengthening tool handle 201. When the alignment is achieved based on the adjustment locking structure between the tool handle and the installation position, the quick-change structure can realize the rapid disassembly and replacement of the turning blade 104 or the strengthening tool head 202, which is easier to operate. After replacing the tool of the same specification, the alignment can still be accurate, or the locking screw 303 can be loosened again after replacement to adjust the position of the tool handle for alignment; the quick-change structure can be an existing quick-change matching structure such as a snap-on structure or a matching structure of an elastic protrusion and a groove, and there is no restriction on it;

[0039] In some embodiments, reference Figure 7 and Figure 8 The output end of the strengthening tool head 202 is square, spherical or cylindrical. Preferably, multiple strengthening tool heads 202 are provided, each tool head is set in a different shape. Fig. 9 , so that the enhanced tool head 202 can adapt to the processing of straight surfaces, inclined surfaces, curved surfaces and even step surfaces, and has a wide range of applications; based on the aforementioned quick-change structure, the enhanced tool head 202 can be replaced conveniently and quickly, further improving efficiency.

[0040] In some embodiments, reference Figure 2A guide plate 302 is provided between the first mounting position and the second mounting position, and is used for guiding the iron chips generated during the process of machining the workpiece by the ultrasonic turning tool assembly to move in the direction away from the ultrasonic surface strengthening assembly. Specifically, a guide plate 302 is provided on the surface of the tool holder 301 between the first mounting position and the second mounting position to prevent the flying chips generated during the turning process from falling to the second mounting position, thereby avoiding adverse effects such as interference with the ultrasonic surface strengthening. Preferably, the guide plate 302 is a flat plate. In other embodiments, the shape of the guide plate 302 can be optimized according to the chip blocking requirements, chip blocking effects, etc., such as arc, triangle, etc.

[0041] In some embodiments, reference Figure 1 and Figure 4 The ultrasonic power generator 101 is electrically connected to the first mounting position and the second mounting position through the connecting cable 103. The ultrasonic composite machining system also includes an air pressure regulating device 203, which is connected to the air source and the air interface 2012 through the air pipeline to achieve the working parameter adjustment of the ultrasonic frequency and amplitude.

[0042] In some embodiments, reference Figure 2 A clamping structure for cooperating with the clamping jaws of the spindle of the CNC lathe 400 is provided on one side of the tool rest 301. Preferably, the clamping structure is a protrusion formed on the surface of one side of the tool rest 301, which can be inserted into the clamping jaws of the spindle and then clamped by the clamping jaws to achieve clamping;

[0043] In one embodiment, reference Figure 1The CNC lathe 400 is a double-head CNC gantry-type turning and milling compound machining center. The workpiece is a large annular workpiece. The CNC lathe 400 includes a first spindle 401 and a second spindle 402. The ultrasonic compound machining system is provided with at least two groups of tool holders 301, and each group of tool holders 301 includes at least two tool holders 301; the clamping structure of the first group of tool holders 301 is arranged on one side of the tool holder 301 and is parallel to the distribution direction from the first installation position to the second installation position; the clamping structure of the second group of tool holders 301 is arranged on one side of the tool holder 301 and is perpendicular to the distribution direction from the first installation position to the second installation position, the clamping structure of at least one tool holder 301 in the second group of tool holders 301 is located on a side close to the first installation position, and the clamping structure of at least one tool holder 301 in the second group of tool holders 301 is located on a side close to the second installation position; it can be understood that two groups of tool holders 301 are provided, and the installation positions in the two groups of tool holders 301 They are respectively arranged in a horizontal direction and a vertical direction. In the horizontal layout structure, the clamping structure is arranged on one side of the tool holder 301 and is parallel to the distribution direction from the first installation position to the second installation position. The two spindles are respectively installed with the tool holder 301 to realize that the two spindles start processing from different starting points together, thereby improving efficiency and shortening the processing cycle; in the vertical layout structure, the clamping structure is arranged on one side of the tool holder 301 and is perpendicular to the distribution direction from the first installation position to the second installation position. The installation positions of the two tool holders 301 in the second group of tool holders 301 are opposite, that is, after clamping, the first installation position of one tool holder 301 is located at the top, and the first installation position of the other tool holder 301 is located at the bottom, that is, different processing directions are matched respectively, so that one spindle can be processed from top to bottom and the other spindle can be processed from bottom to top, thereby effectively improving processing efficiency; based on the structure of the tool holder 301 and the configuration of multiple types of tool holders 301, the adaptability of the device is greatly improved.

[0044] On the other hand, this embodiment further provides an ultrasonic machining method, which uses the above-mentioned ultrasonic composite machining system, and the machining method includes:

[0045] S1. Clamping the workpiece on the CNC lathe 400; Specifically, the workpiece to be processed is fixed on the workbench of the CNC lathe 400 by a workbench chuck, bolts and a clamping plate;

[0046] S2. The ultrasonic turning tool assembly is installed at the first installation position, the ultrasonic surface strengthening assembly is installed at the second installation position, and the tool holder 301 is installed on the CNC lathe 400; specifically, a suitable turning blade 104 and a strengthening tool head 202 are selected, the turning blade 104 is installed into the ultrasonic turning tool handle 102, the strengthening tool head 202 is installed into the ultrasonic surface strengthening tool handle 201, and then the ultrasonic turning tool handle 102 is installed into the first installation position, and the ultrasonic surface strengthening tool handle 201 is installed into the second installation position;

[0047] S3. Tool setting; Specifically, adjust the relative positions of the ultrasonic turning tool holder 102 and the ultrasonic surface strengthening tool holder 201 in the output direction to set the tool on the workpiece, lock the ultrasonic turning tool holder 102 in the first installation position through the locking screw 303 of the first locking mechanism, lock the ultrasonic surface strengthening tool holder 201 in the second installation position through the locking screw 303 of the second locking mechanism, install the tool holder 301 on the spindle of the lathe, and complete the installation of the tool assembly assembly;

[0048] S4. The tool holder 301 is connected to the ultrasonic power generator 101 and the air source, and the ultrasonic frequency and amplitude are adjusted to the preset parameters respectively; specifically, the two ends of the connecting cable 103 are respectively connected to the ultrasonic power generator 101 and the first power interface 1021 of the ultrasonic lathe handle 102 and the second power interface 2011 of the ultrasonic surface strengthening handle 201, and the two ends of the air pressure pipeline 204 are connected to the air source interface and the air pressure adjustment device of the ultrasonic surface strengthening handle 201; the air pressure adjustment device is connected to the ultrasonic surface strengthening device and the workshop air pressure source, and after being connected, the ultrasonic frequency and amplitude are adjusted to the preset parameters respectively;

[0049] S5. Start the CNC lathe 400 and start processing; the CNC lathe 400 is preset by the CNC program and starts processing; the overall equipment realizes ultrasonic turning and ultrasonic surface strengthening of the parts simultaneously, and while the parts are ultrasonically turned and formed, the surface of the parts is strengthened by ultrasonic surface strengthening to obtain high-precision dimensional accuracy and high surface roughness, and the processing cycle is shortened by at least twice compared with the traditional processing method;

[0050] In some embodiments, the CNC lathe 400 includes a first spindle 401 and a second spindle 402, and the first spindle 401 and the second spindle 402 are respectively provided with a tool holder 301. Step S5 includes: the first spindle 401 controls the corresponding tool holder 301 to process the workpiece from top to bottom to a preset height position, and the second spindle 402 controls the corresponding tool holder 301 to process the workpiece from bottom to top to a preset height position, thereby further improving the processing efficiency and shortening the processing cycle.

[0051] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultrasonic composite machining system, characterized in that: Applied to a numerically controlled lathe (400), the ultrasonic composite machining system comprises a tool assembly assembly, the tool assembly assembly comprises a tool holder (301), an ultrasonic turning tool assembly and an ultrasonic surface strengthening assembly, the tool holder (301) being used to be connected to the spindle of the numerically controlled lathe (400); the tool holder (301) is provided with a first mounting position for mounting the ultrasonic turning tool assembly, a second mounting position for mounting the ultrasonic surface strengthening assembly, a first power interface (1021) electrically connected to the first mounting position and used to be electrically connected to the ultrasonic power generator (101), a second power interface (2011) electrically connected to the second mounting position and used to be electrically connected to the ultrasonic power generator (101), and an air path interface (2012) connected to the second mounting position and used to be connected to an air source; the first mounting position and the second mounting position have a preset height difference and / or the first mounting position and the second mounting position have a preset depth difference and / or the output end of the ultrasonic turning tool assembly mounted at the first mounting position and the output end of the ultrasonic surface strengthening assembly mounted at the second mounting position have a preset axial spacing.

2. The ultrasonic composite machining system according to claim 1, characterized in that: The ultrasonic turning tool assembly comprises a turning blade (104) and an ultrasonic turning tool handle (102) for mounting the turning blade (104); the ultrasonic turning tool handle (102) is also used for mounting at the first mounting position; and a first locking mechanism for fixing the ultrasonic turning tool handle (102) at the first mounting position is provided on one side of the tool holder (301).

3. The ultrasonic composite machining system according to claim 1, characterized in that: The ultrasonic surface strengthening component comprises a strengthening tool head (202) and an ultrasonic surface strengthening tool handle (201) for mounting the strengthening tool head (202); the ultrasonic surface strengthening tool handle (201) is also used for mounting at the second mounting position; and a second locking mechanism for fixing the ultrasonic surface strengthening tool handle (201) at the second mounting position is provided on one side of the tool holder (301).

4. The ultrasonic composite machining system according to claim 3, characterized in that: The output end of the strengthening tool head (202) is square, spherical or cylindrical.

5. The ultrasonic composite machining system according to claim 1, characterized in that: A guide plate (302) is provided between the first installation position and the second installation position, and is used to guide iron chips generated during the process of machining a workpiece by the ultrasonic turning tool assembly to move in a direction away from the ultrasonic surface strengthening assembly.

6. The ultrasonic composite machining system according to claim 1, characterized in that: The ultrasonic composite machining system further comprises an air pressure regulating device (203), wherein the air pressure regulating device (203) is connected to the air source and the air path interface (2012) via air path pipelines.

7. The ultrasonic composite machining system according to any one of claims 1 to 6, characterized in that: A clamping structure for cooperating with a chuck of a main shaft of the CNC lathe (400) is provided on one side of the tool holder (301).

8. The ultrasonic composite machining system according to claim 7, wherein the CNC lathe (400) comprises a first spindle (401) and a second spindle (402), wherein: The ultrasonic composite machining system is provided with at least two groups of tool holders (301), each group of tool holders (301) comprising at least two tool holders (301); the clamping structure of the first group of tool holders (301) is arranged on one side of the tool holder (301) and is parallel to the distribution direction from the first installation position to the second installation position; the clamping structure of the second group of tool holders (301) is arranged on one side of the tool holder (301) and is perpendicular to the distribution direction from the first installation position to the second installation position, the clamping structure of at least one tool holder (301) in the second group of tool holders (301) is located on a side close to the first installation position, and the clamping structure of at least one tool holder (301) in the second group of tool holders (301) is located on a side close to the second installation position.

9. An ultrasonic machining method, characterized in that: The ultrasonic composite machining system according to any one of claims 1 to 8 is used, and the machining method comprises: S1. Clamp the workpiece on the CNC lathe; S2. The ultrasonic turning tool assembly is installed in the first mounting position, the ultrasonic surface strengthening assembly is installed in the second mounting position, and the tool holder is installed on the CNC lathe; S3. Tool setting; S4. The tool holder is connected to the ultrasonic power generator and the air source, and the ultrasonic frequency and amplitude are adjusted to the preset parameters respectively; S5. Start the CNC lathe and start processing.

10. The ultrasonic machining method according to claim 9, wherein the CNC lathe comprises a first spindle and a second spindle, wherein: The first spindle and the second spindle are respectively provided with the tool holder, and step S5 includes: the first spindle controls the corresponding tool holder to process the workpiece from top to bottom to a preset height position, and the second spindle controls the corresponding tool holder to process the workpiece from bottom to top to a preset height position.

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