A multi-axis machining device for TiAl alloy non-contact electric field in-situ assisted machining and its application method

Abstract

This invention relates to a non-contact electric field-assisted in-situ multi-axis machining device for TiAl alloys and its application method. The aim of this invention is to solve the technical problems of severe tool wear, poor machining accuracy, and low machining efficiency in current TiAl alloy machining processes. This invention utilizes the electroplastic effect, employing non-contact electric field in-situ assistance, combined with a multi-axis precision control system, cutting force sensor, and workpiece fixture, to achieve high-precision and high-efficiency machining of difficult-to-machine TiAl alloy materials, while reducing tool wear and equipment upgrade costs. This invention is not only applicable to the machining of TiAl alloys but also provides a new approach for the precision machining of difficult-to-machine materials, possessing significant practical value and technological advancement.

Description

Technical Field

[0001] This invention relates to a multi-axis machining apparatus for TiAl alloy with in-situ electric field assistance and its usage method. Background Technology

[0002] TiAl alloys, as lightweight, heat-resistant, and high-temperature structural materials, possess low density, high specific strength, and excellent high-temperature oxidation resistance and creep resistance, making them primarily used in aerospace and other fields. However, as a difficult-to-machine intermetallic compound, TiAl alloys present significant challenges in processing, particularly in precision machining, including:

[0003] (1) Severe tool wear: Due to the intrinsic brittleness and high hardness of TiAl alloy, traditional machining processes cause significant tool wear, which not only reduces machining efficiency but also increases machining costs. Furthermore, its relatively low thermal conductivity makes it prone to localized overheating during cutting, further exacerbating tool wear and material damage.

[0004] (2) Low processing efficiency: The high hardness and low thermal conductivity of TiAl alloy make it difficult to dissipate the heat generated during processing in a timely manner, which means that the processing speed must be controlled at a low level to prevent material damage, thereby reducing processing efficiency.

[0005] (3) Difficulty in ensuring machining accuracy: Machining of high-hardness and brittle materials is prone to cracks and fractures, especially when machining complex shapes or parts requiring high precision, making it difficult to guarantee machining quality and meet the needs of high-performance applications.

[0006] To address the aforementioned problems in the precision machining of TiAl alloys, researchers have been exploring a high-efficiency, high-quality precision machining technology for TiAl alloys. In recent years, with the rapid development of non-traditional machining technologies, new processing techniques such as laser processing, electrochemical processing, and coolant-assisted processing have been developed and are gradually being applied to the manufacturing of TiAl alloy parts. Compared to traditional machining, these new technologies have demonstrated superior processing effects, such as effectively reducing tool wear and improving part machining accuracy and efficiency. However, currently developed new processing technologies suffer from high equipment costs, complex processing control parameters, and limited applicability, making them difficult to promote in practical applications. Therefore, there is an urgent need to develop a new, low-cost, easy-to-operate, and widely applicable precision machining technology for TiAl alloys to overcome the shortcomings of existing technologies, such as high cost, complex processing procedures, and poor applicability, and to achieve high-efficiency, high-quality manufacturing of TiAl alloy parts. Summary of the Invention

[0007] The present invention aims to solve the technical problems of severe tool wear, poor machining accuracy, and low machining efficiency in the current TiAl alloy machining process, and provides a multi-axis machining device for TiAl alloy non-contact electric field in-situ assisted machining and its usage method.

[0008] The multi-axis machining device for TiAl alloy non-contact electric field in-situ assisted machining of TiAl alloy consists of a CNC lathe, a non-contact electric field in-situ assisted device 4, a workpiece fixture 5, a cutting force sensor 8, a diamond tool 9, a vertical support 10, a base plate 11, and a controller.

[0009] The CNC lathe is composed of an X-axis electric displacement platform 1, a Y-axis electric displacement platform 2, a C-axis electric rotary platform 3, and a Z-axis electric displacement platform 7. The X-axis electric displacement platform 1 and the vertical support 10 are both fixed on the base plate 11, the Z-axis electric displacement platform 7 is fixed on the vertical support 10, the base of the cutting force sensor 8 is fixed on the motion plate of the Z-axis electric displacement platform 7, and the diamond tool 9 is fixed to the sensing part of the cutting force sensor 8 with the cutting edge facing downward.

[0010] The non-contact electric field in-situ auxiliary device 4 consists of metal plates 41, a rotating shell 42, a bottom support 43, a circular base 44, and ball bearings 45. The rotating shell 42 has a ring-shaped structure with open ends. Two metal plates 41 are symmetrically arranged on the inner wall of the rotating shell 42 and are respectively connected to the two poles of an external power supply. Multiple ball bearings 45 are evenly installed on the bottom surface of the rotating shell 42. The circular base 44 has a ring-shaped structure with open ends. The diameter of the circular base 44 is equal to that of the rotating shell 42. A groove is provided around the outer edge of the upper surface of the circular base 44, and the ball bearings 45 are rolled in the groove. The rotating shell 42 is located directly above the circular base 44, and two bottom supports 43 are symmetrically fixed below the circular base 44.

[0011] The C-axis electric rotary platform 3 is fixed on the upper surface of the motion plate of the Y-axis electric displacement platform 2. The non-contact electric field in-situ auxiliary device 4 is set directly above the C-axis electric rotary platform 3. The two bottom brackets 43 are fixed on the side of the base of the Y-axis electric displacement platform 2.

[0012] The workpiece clamp 5 has an open top and closed bottom structure. The workpiece clamp 5 is set in the central cavity of the non-contact electric field in-situ auxiliary device 4 and fixed on the C-axis electric rotary platform 3. Multiple limiting through holes 5-1 are evenly arranged on the side of the workpiece clamp 5. The diamond tool 9 is set above the workpiece clamp 5.

[0013] The signal input terminal of the controller is connected to the signal output terminal of the cutting force sensor 8; the signal output terminal of the controller is connected to the signal input terminals of the X-axis electric displacement platform 1, the Y-axis electric displacement platform 2, the C-axis electric rotary platform 3, and the Z-axis electric displacement platform 7, respectively.

[0014] The CNC lathe in this invention is an existing device, equipped with an XYZ three-axis linear motion platform and a C-axis rotary platform.

[0015] The cutting force sensor 8 in this invention is an existing device. The diamond tool 9 and the sensing part of the cutting force sensor 8 are fixed. The cutting force of the diamond tool 9 is obtained by the cutting force sensor 8. The cutting force sensor 8 and the diamond tool 9 are moved by the Z-axis electric displacement platform 7 to process the TiAl alloy workpiece 6 to be processed.

[0016] The method of using the TiAl alloy non-contact electric field in-situ assisted multi-axis machining device of the present invention is as follows:

[0017] 1. Workpiece clamping: Place the TiAl alloy workpiece 6 to be processed into the workpiece fixture 5. The bolt passes through the limiting through hole 5-1 to lock the TiAl alloy workpiece 6 to be processed. The TiAl alloy workpiece 6 is at the same height as the two metal plates 41.

[0018] 2. By controlling the X-axis electric displacement platform 1, Y-axis electric displacement platform 2, C-axis electric rotary platform 3 and Z-axis electric displacement platform 7 on the CNC lathe, the TiAl alloy workpiece 6 to be processed is moved to the diamond tool 9; the rotating shell 42 is manually rotated to drive the two metal plates 41 to rotate, thereby controlling the direction of the electric field, and the external power supply connected to the metal plates 41 is started to form an auxiliary electric field in the TiAl alloy processing area.

[0019] III. Processing Parameter Settings: Based on the properties and processing requirements of the TiAl alloy workpiece 6 to be processed, the processing parameters are set as follows: electric field strength, electric field direction, processing position of TiAl alloy workpiece 6, processing size, and processing speed.

[0020] The electric field strength is controlled by the voltage of an external power supply; the electric field direction is controlled by manually rotating the outer shell 42; the machining dimensions, machining position, and machining speed of the TiAl alloy workpiece 6 are all controlled by a CNC lathe.

[0021] IV. Monitoring and Adjustment: During the machining process, the cutting force is monitored in real time by the cutting force sensor 8 to observe the machining status and workpiece surface quality. Machining parameters are adjusted as needed to ensure machining quality.

[0022] V. Machining Completion and Post-processing: After machining is completed, turn off the electric field and CNC lathe, remove the machined TiAl alloy workpiece 6, and perform deburring and surface treatment.

[0023] This invention employs a non-contact, in-situ electric field assistance method, meaning the metal plates do not contact the workpiece and do not conduct current. Compared to contact electric fields, this method offers the following advantages:

[0024] 1. Easy Installation: By avoiding direct contact between the metal electrode plates and the workpiece, integration into existing lathes does not require major modifications or adjustments to the lathe's internal structure. This device can be added as a standalone module to existing machining systems, operating using existing power supplies and control systems, significantly reducing the complexity and cost of technology upgrades. Furthermore, the flexibility and adaptability of non-contact electric field assistance allow for easy application to lathes of different types and functions, thereby expanding the lathe's machining capabilities and application range, and providing more possibilities for complex and high-precision machining tasks.

[0025] 2. Reduced physical wear: Non-contact electric field technology does not require direct contact between metal electrodes and workpieces during processing, thus significantly reducing physical wear on workpieces and electrodes, extending workpiece life, and reducing maintenance and replacement costs;

[0026] 3. Improved processing quality: Since there is no physical contact, the non-contact electric field can avoid problems such as workpiece deformation and cracks caused by contact pressure or heat during processing, thus improving the surface quality and processing accuracy of the processed parts;

[0027] 4. Suitable for processing complex shapes: Due to its unique processing method, non-contact electric field technology can more easily process complex geometric shapes and fine details, expanding the processing range and application areas;

[0028] 5. Reduced heat-affected zone: In non-contact electric field machining, the reduction of direct physical contact reduces heat accumulation during the machining process, thereby reducing the heat-affected zone and helping to maintain the intrinsic properties of the material.

[0029] 6. Improved processing efficiency: Non-contact electric field assisted machining can be performed without direct contact with the workpiece, which makes the machining process more flexible and allows for higher machining speeds, thereby improving production efficiency;

[0030] 7. Simplified process flow: By reducing reliance on precision electrodes, non-contact electric field processing technology can simplify the process flow, reduce the time and cost required for electrode preparation and replacement, and make the entire processing process more economical and efficient.

[0031] 8. Environmentally friendly: Non-contact processing reduces mechanical wear and heat generation, which relatively reduces energy consumption and material waste during the processing, resulting in a smaller impact on the environment and making it more environmentally friendly.

[0032] The apparatus and method of use of the present invention can also achieve the following technical effects:

[0033] (1) Improve machining accuracy: Electric field-assisted multi-axis precision control can effectively improve the plastic deformation and stress concentration in the machining area of ​​TiAl alloy material during the machining process, thereby improving the accuracy of the workpiece;

[0034] (2) Improve processing efficiency: Electric field assistance can effectively reduce the flow stress and cutting resistance of materials, and can remove materials more quickly, thereby improving the processing efficiency of workpieces;

[0035] (3) Reduce tool wear: Electric field assistance can improve the plastic deformation ability of TiAl alloy material in the machining area, reduce the hardness and cutting force of the material, thereby significantly reducing tool wear, extending tool life, and further reducing machining costs;

[0036] (4) Improve machining quality: Use a cutting force sensor real-time monitoring system to optimize machining parameters and improve the machining quality of workpieces.

[0037] (5) Non-contact electric field in-situ auxiliary device: Based on the theory of electroplasticity, the electric field generated by the metal plate is directly applied to the processing area of ​​the part. The electric field is used to improve the plasticity and flow stress of the TiAl alloy processing area. The auxiliary electric field provided can improve the processing conditions of the part, reduce tool wear, and thus improve processing efficiency. This device is easy to embed into existing machining equipment, which can reduce the cost of upgrading and replacing processing equipment.

[0038] (6) Multi-axis precision control: The device includes X-axis, Y-axis, Z-axis electric displacement platforms and C-axis electric rotary platform, which can realize multi-directional, high-precision position movement control. By controlling the movement and rotation of parts through multi-axis precision control, and in conjunction with an auxiliary electric field, high-precision machining of complex TiAl alloy parts can be achieved;

[0039] (7) Diamond cutting tools and cutting force sensor: This invention relates to diamond machining tools, and is equipped with a cutting force sensor to monitor the machining process and adjust the machining parameters in real time to ensure the surface quality of the parts. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the multi-axis machining device for TiAl alloy non-contact electric field in-situ assisted machining in Specific Implementation Method 1.

[0041] Figure 2 This is a three-dimensional schematic diagram of the non-contact electric field in-situ auxiliary device 4 in the first specific implementation method.

[0042] Figure 3 This is a cross-sectional view of the non-contact electric field in-situ auxiliary device 4 in Specific Implementation Method 1.

[0043] Figure 4 This is a three-dimensional schematic diagram of the workpiece fixture 5 in the first specific implementation method;

[0044] Figure 5 This is a process flow diagram illustrating the usage of the multi-axis machining device for TiAl alloy non-contact electric field in-situ assisted machining in Specific Implementation Method 10. Detailed Implementation

[0045] Specific Implementation Method 1: This implementation method is a multi-axis machining device for TiAl alloy with non-contact electric field in-situ assistance, such as... Figures 1-4 As shown, it is specifically composed of a CNC lathe, a non-contact electric field in-situ auxiliary device 4, a workpiece fixture 5, a cutting force sensor 8, a diamond tool 9, a vertical support 10, a base plate 11, and a controller.

[0046] The CNC lathe is composed of an X-axis electric displacement platform 1, a Y-axis electric displacement platform 2, a C-axis electric rotary platform 3, and a Z-axis electric displacement platform 7. The X-axis electric displacement platform 1 and the vertical support 10 are both fixed on the base plate 11, the Z-axis electric displacement platform 7 is fixed on the vertical support 10, the base of the cutting force sensor 8 is fixed on the motion plate of the Z-axis electric displacement platform 7, and the diamond tool 9 is fixed to the sensing part of the cutting force sensor 8 with the cutting edge facing downward.

[0047] The non-contact electric field in-situ auxiliary device 4 consists of metal plates 41, a rotating shell 42, a bottom support 43, a circular base 44, and ball bearings 45. The rotating shell 42 has a ring-shaped structure with open ends. Two metal plates 41 are symmetrically arranged on the inner wall of the rotating shell 42 and are respectively connected to the two poles of an external power supply. Multiple ball bearings 45 are evenly installed on the bottom surface of the rotating shell 42. The circular base 44 has a ring-shaped structure with open ends. The diameter of the circular base 44 is equal to that of the rotating shell 42. A groove is provided around the outer edge of the upper surface of the circular base 44, and the ball bearings 45 are rolled in the groove. The rotating shell 42 is located directly above the circular base 44, and two bottom supports 43 are symmetrically fixed below the circular base 44.

[0048] The C-axis electric rotary platform 3 is fixed on the upper surface of the motion plate of the Y-axis electric displacement platform 2. The non-contact electric field in-situ auxiliary device 4 is set directly above the C-axis electric rotary platform 3. The two bottom brackets 43 are fixed on the side of the base of the Y-axis electric displacement platform 2.

[0049] The workpiece clamp 5 has an open top and closed bottom structure. The workpiece clamp 5 is set in the central cavity of the non-contact electric field in-situ auxiliary device 4 and fixed on the C-axis electric rotary platform 3. Multiple limiting through holes 5-1 are evenly arranged on the side of the workpiece clamp 5. The diamond tool 9 is set above the workpiece clamp 5.

[0050] The signal input terminal of the controller is connected to the signal output terminal of the cutting force sensor 8; the signal output terminal of the controller is connected to the signal input terminals of the X-axis electric displacement platform 1, the Y-axis electric displacement platform 2, the C-axis electric rotary platform 3, and the Z-axis electric displacement platform 7, respectively.

[0051] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the metal electrode plate 41 is made of copper. Everything else is the same as in Specific Implementation Method One.

[0052] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One or Two in that the base plate 11 is a shock-absorbing plate. Everything else is the same as in Specific Implementation Method One or Two.

[0053] Specific Implementation Method Four: This implementation method differs from Specific Implementation Methods One to Three in that the rotating outer shell 42 is made of insulating material. Everything else is the same as in Specific Implementation Methods One to Three.

[0054] Specific Implementation Method Five: This implementation method differs from Specific Implementation Method Four in that the insulating material is plastic. Everything else is the same as in Specific Implementation Method Four.

[0055] Specific Implementation Method Six: This implementation method differs from Specific Implementation Method Five in that the workpiece fixture 5 has a square structure. Everything else is the same as in Specific Implementation Method Five.

[0056] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Method Six in that the cutting force sensor 8 and the diamond tool 9 are fixed by bolts. Everything else is the same as in Specific Implementation Method Six.

[0057] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Method Seven in that the cutting force sensor 8 and the Z-axis electric displacement platform 7 are fixed by bolts. Everything else is the same as in Specific Implementation Method Seven.

[0058] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Method Eight in that the two bottom supports 43 are fixed to the side of the base of the Y-axis electric displacement platform 2 by bolts. Everything else is the same as in Specific Implementation Method Eight.

[0059] Specific Implementation Method Ten: This implementation method is the usage method of the TiAl alloy non-contact electric field in-situ assisted multi-axis machining device in Specific Implementation Method One, specifically as follows:

[0060] 1. Workpiece clamping: Place the TiAl alloy workpiece 6 to be processed into the workpiece fixture 5. The bolt passes through the limiting through hole 5-1 to lock the TiAl alloy workpiece 6 to be processed. The TiAl alloy workpiece 6 is at the same height as the two metal plates 41.

[0061] 2. By controlling the X-axis electric displacement platform 1, Y-axis electric displacement platform 2, C-axis electric rotary platform 3 and Z-axis electric displacement platform 7 on the CNC lathe, the TiAl alloy workpiece 6 to be processed is moved to the diamond tool 9; the rotating shell 42 is manually rotated to drive the two metal plates 41 to rotate, thereby controlling the direction of the electric field, and the external power supply connected to the metal plates 41 is started to form an auxiliary electric field in the TiAl alloy processing area.

[0062] III. Processing Parameter Settings: Based on the properties and processing requirements of the TiAl alloy workpiece 6 to be processed, the processing parameters are set as follows: electric field strength, electric field direction, processing position of TiAl alloy workpiece 6, processing size, and processing speed.

[0063] The electric field strength is controlled by the voltage of an external power supply; the electric field direction is controlled by manually rotating the outer shell 42; the machining dimensions, machining position, and machining speed of the TiAl alloy workpiece 6 are all controlled by a CNC lathe.

[0064] IV. Monitoring and Adjustment: During the machining process, the cutting force is monitored in real time by the cutting force sensor 8 to observe the machining status and workpiece surface quality. Machining parameters are adjusted as needed to ensure machining quality.

[0065] V. Machining Completion and Post-processing: After machining is completed, turn off the electric field and CNC lathe, remove the machined TiAl alloy workpiece 6, and perform deburring and surface treatment.

[0066] This implementation method employs a non-contact, in-situ electric field assistance approach, meaning the metal plates do not contact the workpiece and do not conduct current. Compared to contact electric fields, this method offers the following advantages:

[0067] 1. Easy Installation: By avoiding direct contact between the metal electrode plates and the workpiece, integration into existing lathes does not require major modifications or adjustments to the lathe's internal structure. This device can be added as a standalone module to existing machining systems, operating using existing power supplies and control systems, significantly reducing the complexity and cost of technology upgrades. Furthermore, the flexibility and adaptability of non-contact electric field assistance allow for easy application to lathes of different types and functions, thereby expanding the lathe's machining capabilities and application range, and providing more possibilities for complex and high-precision machining tasks.

[0068] 2. Reduced physical wear: Non-contact electric field technology does not require direct contact between metal electrodes and workpieces during processing, thus significantly reducing physical wear on workpieces and electrodes, extending workpiece life, and reducing maintenance and replacement costs;

[0069] 3. Improved processing quality: Since there is no physical contact, the non-contact electric field can avoid problems such as workpiece deformation and cracks caused by contact pressure or heat during processing, thus improving the surface quality and processing accuracy of the processed parts;

[0070] 4. Suitable for processing complex shapes: Due to its unique processing method, non-contact electric field technology can more easily process complex geometric shapes and fine details, expanding the processing range and application areas;

[0071] 5. Reduced heat-affected zone: In non-contact electric field machining, the reduction of direct physical contact reduces heat accumulation during the machining process, thereby reducing the heat-affected zone and helping to maintain the intrinsic properties of the material.

[0072] 6. Improved processing efficiency: Non-contact electric field assisted machining can be performed without direct contact with the workpiece, which makes the machining process more flexible and allows for higher machining speeds, thereby improving production efficiency;

[0073] 7. Simplified process flow: By reducing reliance on precision electrodes, non-contact electric field processing technology can simplify the process flow, reduce the time and cost required for electrode preparation and replacement, and make the entire processing process more economical and efficient.

[0074] 8. Environmentally friendly: Non-contact processing reduces mechanical wear and heat generation, which relatively reduces energy consumption and material waste during the processing, resulting in a smaller impact on the environment and making it more environmentally friendly.

[0075] The apparatus and method of use described in this embodiment can also achieve the following technical effects:

[0076] (1) Improve machining accuracy: Electric field-assisted multi-axis precision control can effectively improve the plastic deformation and stress concentration in the machining area of ​​TiAl alloy material during the machining process, thereby improving the accuracy of the workpiece;

[0077] (2) Improve processing efficiency: Electric field assistance can effectively reduce the flow stress and cutting resistance of materials, and can remove materials more quickly, thereby improving the processing efficiency of workpieces;

[0078] (3) Reduce tool wear: Electric field assistance can improve the plastic deformation ability of TiAl alloy material in the machining area, reduce the hardness and cutting force of the material, thereby significantly reducing tool wear, extending tool life, and further reducing machining costs;

[0079] (4) Improve machining quality: Use a cutting force sensor real-time monitoring system to optimize machining parameters and improve the machining quality of workpieces.

[0080] (5) Non-contact electric field in-situ auxiliary device: Based on the theory of electroplasticity, the electric field generated by the metal plate is directly applied to the processing area of ​​the part. The electric field is used to improve the plasticity and flow stress of the TiAl alloy processing area. The auxiliary electric field provided can improve the processing conditions of the part, reduce tool wear, and thus improve processing efficiency. This device is easy to embed into existing machining equipment, which can reduce the cost of upgrading and replacing processing equipment.

[0081] (6) Multi-axis precision control: The device includes X-axis, Y-axis, Z-axis electric displacement platforms and C-axis electric rotary platform, which can realize multi-directional, high-precision position movement control. By controlling the movement and rotation of parts through multi-axis precision control, and in conjunction with an auxiliary electric field, high-precision machining of complex TiAl alloy parts can be achieved;

[0082] (7) Diamond cutting tools and cutting force sensor: This invention relates to diamond machining tools, and is equipped with a cutting force sensor to monitor the machining process and adjust the machining parameters in real time to ensure the surface quality of the parts.

Claims

1. A non-contact electric field in-situ assisted multi-axial machining apparatus of a TiAl alloy, characterized by The TiAl alloy non-contact electric field in-situ assisted multi-axis machining device is composed of a numerical control lathe, a non-contact electric field in-situ assisted device (4), a workpiece clamp (5), a cutting force sensor (8), a diamond tool (9), a vertical support (10), a bottom plate (11) and a controller. The numerical control lathe is composed of an X-axis electric displacement platform (1), a Y-axis electric displacement platform (2), a C-axis electric rotation platform (3) and a Z-axis electric displacement platform (7); the X-axis electric displacement platform (1) and the vertical support (10) are both fixed on the bottom plate (11), the Z-axis electric displacement platform (7) is fixed on the vertical support (10), the base part of the cutting force sensor (8) is fixed on the moving plate of the Z-axis electric displacement platform (7), and the diamond tool (9) is fixed with the sensing part of the cutting force sensor (8) and the cutting edge part thereof faces downward. The non-contact electric field in-situ assisted device (4) is composed of a metal electrode plate (41), a rotating shell (42), a bottom support (43), a circular base (44) and a ball (45); the rotating shell (42) is a circular ring structure, both upper and lower ends are open structures, two metal electrode plates (41) are symmetrically arranged on the inner wall of the rotating shell (42), the two metal electrode plates (41) are respectively connected with two levels of external power supply, and a plurality of balls (45) are uniformly arranged on the bottom surface of the rotating shell (42); the circular base (44) is a circular ring structure, both upper and lower ends are open structures, the diameter of the circular base (44) is equal to that of the rotating shell (42), a circle of grooves is arranged on the outer edge of the upper surface of the circular base (44), the balls (45) are arranged in the grooves for rolling connection, the rotating shell (42) is arranged directly above the circular base (44), and two bottom supports (43) are symmetrically fixed below the circular base (44). The C-axis electric rotation platform (3) is fixed to the upper surface of the moving plate of the Y-axis electric displacement platform (2), the non-contact electric field in-situ assisted device (4) is arranged directly above the C-axis electric rotation platform (3), and the two bottom supports (43) are fixed to the side edges of the base of the Y-axis electric displacement platform (2). The workpiece clamp (5) has an open upper part and a closed lower part, is arranged in the central inner cavity of the non-contact electric field in-situ assisted device (4) and is fixed to the C-axis electric rotation platform (3), a plurality of limiting through holes (5-1) are uniformly arranged on the side edges of the workpiece clamp (5), and the diamond tool (9) is arranged above the workpiece clamp (5). The signal input end of the controller is connected with the signal output end of the cutting force sensor (8); and the signal output end of the controller is connected with the signal input ends of the X-axis electric displacement platform (1), the Y-axis electric displacement platform (2), the C-axis electric rotation platform (3) and the Z-axis electric displacement platform (7) respectively.

2. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The metal electrode plate (41) is made of copper.

3. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The bottom plate (11) is a shockproof plate.

4. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The rotating shell (42) is made of an insulating material.

5. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 4, characterized in that The insulating material is plastic.

6. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The workpiece clamp (5) has a square structure.

7. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The cutting force sensor (8) and the diamond tool (9) are fixed by bolts.

8. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The cutting force sensor (8) and the Z-axis electric displacement platform (7) are fixed by bolts.

9. The apparatus for non-contact electric field in-situ assisted multi-axial machining of a TiAl alloy according to claim 1, characterized in that The two bottom supports (43) are fixed on the base side of the Y-axis electric displacement platform (2) by bolts.

10. A method of using a non-contact electric field in-situ assisted multi-axial machining apparatus of a TiAl alloy as claimed in claim 1, characterized in that The method for using the non-contact electric field in-situ assisted multi-axis machining device of TiAl alloy is as follows: I. Workpiece clamping: place the TiAl alloy workpiece (6) to be machined into the workpiece clamp (5), bolt through the limiting through hole (5-1) to top dead of the TiAl alloy workpiece (6) to be machined for limiting, the TiAl alloy workpiece (6) is the same height with two metal plates (41); II. Move the TiAl alloy workpiece (6) to be machined to the diamond tool (9) by controlling the X-axis electric displacement platform (1), the Y-axis electric displacement platform (2), the C-axis electric rotation platform (3) and the Z-axis electric displacement platform (7) on the numerical control lathe; manually rotate the rotating shell (42) to drive the two metal plates (41) to rotate to control the electric field direction, start the external power supply connected with the metal plate (41), and form the auxiliary electric field of the TiAl alloy machining area; III. Processing parameter setting: set the processing parameters according to the properties and processing requirements of the TiAl alloy workpiece (6) to be machined, the processing parameters are electric field intensity, electric field direction, TiAl alloy workpiece (6) processing position, processing size and processing speed; The electric field intensity is controlled by the voltage of the external power supply; the electric field direction is controlled by manually rotating the rotating shell (42); the processing position, processing size and processing speed of the TiAl alloy workpiece (6) are controlled by the numerical control lathe; IV. Monitoring and adjustment: during the processing, the cutting force is monitored in real time by the cutting force sensor (8), the processing state and the workpiece surface quality are observed, and the processing parameters are adjusted according to the needs to ensure the processing quality; V. Processing completion and post-processing: after the processing is completed, the electric field and the numerical control lathe are turned off, the processed TiAl alloy workpiece (6) is taken out, and deburring and surface treatment are carried out.

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