Ultra-precise free-form surface servo fast tool device

Abstract

The ultraprecise free-form surface servo fast tool device comprises a bottom plate and a bearing track, the rear end of the bottom plate is fixed to the rear end of the bearing track through an elastic piece, and the front end of the bottom plate is connected with the bearing track in a fastened mode through a connecting block; the first driving mechanism and the base are both fixed to the bottom plate, the front end and the rear end, in the advancing direction of the first driving mechanism, of the base are each provided with a flexible hinge, and the flexible hinges are used for guiding the first driving mechanism; the servo fast tool assembly is connected with a rotor of the first driving mechanism and is driven by the rotor to do reciprocating motion; the blowing copper pipe and the quick-insertion type air pipe connector are arranged at the front end and the rear end of the bottom plate respectively, a ventilation hole channel is formed in the bottom plate and used for connecting the blowing copper pipe and the quick-insertion type air pipe connector, and air blown out of the blowing copper pipe acts on the rear cutter face of the cutting edge. The device can overcome the vibration defect of an existing servo fast tool, improve the precision of the servo fast tool, reduce vibration and meet the requirements of an existing precise and ultra-precise numerical control machine tool.

Description

Technical Field

[0001] The invention relates to an ultra-precision free-form surface servo fast tool device, belonging to the technical field of ultra-precision machining. Background Art

[0002] With the continuous advancement of science and technology, ultra-precision machining technology has also developed rapidly. Microstructure components with complex surface shapes are widely used in many fields such as military, high-tech equipment, and optical fiber communications. These complex surface microstructure components are also called free-form surfaces, including: light management microstructures, complex surface optical devices and contact lenses, lens arrays, and mechanical components in laser collimators. These components have complex structures and high machining accuracy requirements. It is difficult to meet the machining requirements with traditional machining methods. With the continuous advancement of technology, many fast and ultra-precision free-form surface machining methods have emerged, which can produce microstructure surfaces that meet the requirements, such as photolithography, micro-grinding, laser machining, and fast tool servo. These methods have their own advantages and disadvantages. Among them, fast tool servo is a relatively classic ultra-precision machining technology and one of the hot spots in microstructure turning research. Fast tool servo machining refers to the process of turning, in which the tool is driven by the fast tool servo micro-feed mechanism installed on the Z axis to make a high-frequency response and small-amplitude axial rapid feed motion, and cooperate with high-precision return axis and radial feed to complete the turning process. Compared with other ultra-precision machining methods, the feed frequency of the fast tool servo micro-feed mechanism can reach several thousand Hz or even higher, which greatly improves the machining efficiency. A complex microstructure surface with high surface accuracy can be obtained in one machining, which is suitable for efficient and high-quality machining of microstructure components such as optical components.

[0003] The fast tool servo micro-feed mechanism is a very important component in the fast tool servo machining system. As a high-speed and high-precision displacement output mechanism, its precision determines the accuracy level of the machine tool, and its performance also has a direct impact on the surface quality of the microstructure.

[0004] At present, most of the fast tool servo systems driven by voice coil motors use gas hydrostatic guides for guidance, and their travel can generally reach several millimeters to tens of millimeters. In ultra-precision free-form surface processing, the travel required by the fast tool servo system is only tens to hundreds of microns, and the use of gas hydrostatic guides for guidance will cause waste of travel. In addition, the moving part of the gas hydrostatic guide has a large mass, making it difficult to achieve high-frequency movement. Summary of the invention

[0005] In view of the above technical problems, the present invention provides an ultra-precision free-form surface servo fast tool device, which is a flexible hinge-guided structure. The moving part of the fast tool device guided by the flexible hinge has a small mass and good dynamic performance. Driven by a voice coil motor and fully closed-loop controlled by a linear grating ruler, the servo fast tool has the characteristics of ultra-high precision, high response speed, high load, high rigidity, low vibration, low noise, stable operation and long service life.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An ultra-precision free-form surface servo fast tool device, comprising:

[0008] A bottom plate and a bearing track, wherein the rear end of the bottom plate is fixed to the rear end of the bearing track through an elastic member, and the front end of the bottom plate is fastened to the bearing track through a connecting block;

[0009] A first driving mechanism and a base, both of which are fixed on the bottom plate, and the base is provided with flexible hinges at both ends of the front and rear ends in the travel direction of the first driving mechanism, and the flexible hinges are used to guide the first driving mechanism;

[0010] A servo fast knife assembly is connected to the rotor of the first driving mechanism and performs reciprocating motion driven by the rotor;

[0011] The blowing copper tube and the quick-plug air pipe joint are respectively arranged at the front end and the rear end of the base plate. A ventilation channel is arranged in the base plate for connecting the blowing copper tube and the quick-plug air pipe joint. The gas blown out of the blowing copper tube acts on the back surface of the cutting edge.

[0012] The ultra-precision free-form surface servo fast tool device, preferably, the servo fast tool assembly includes a tool holder connecting rod and a tool holder fixed on the tool holder connecting rod, the tool holder connecting rod is connected to the rotor of the first driving mechanism through a transition block, the tool holder is provided with a tool handle, and the tool handle is provided with a tool particle.

[0013] The ultra-precision free-form surface servo fast tool device, preferably, the servo fast tool assembly also includes a grating ruler and a reading head, the grating ruler is fixed on the tool holder connecting rod, and the reading head is installed on the base through a reading head fixing block.

[0014] The ultra-precision free-form surface servo fast tool device, preferably, the connecting block includes a T-block and an eccentric block, the T-block is fixed to the front end of the base plate, an eccentric block is provided on each side of the T-block, and the eccentric block is fixed to the bearing track by a short plug screw.

[0015] The described ultra-precision free-form surface servo quick tooling device preferably further includes a second driving mechanism installed at the rear end of the bearing track. A push-pull rod is arranged in the bearing track. The rear end of the push-pull rod is connected to the lead screw nut of the second driving mechanism. Four bearings are installed at the front end of the push-pull rod. The upper two bearings are in contact with the inclined surface under the bottom plate, and the lower two bearings are in contact with the upper surface of the bearing track.

[0016] The described ultra-precision free-form surface servo quick tooling device preferably further has a push-pull rod photoelectric switch arranged on the bearing track to help the second driving mechanism find the zero position.

[0017] The described ultra-precision free-form surface servo quick tooling device preferably has a base in a "匸"-shaped structure. The flexible hinges are respectively installed at the front and rear ends of the base, and the side surface of the base is encapsulated by a pressing plate.

[0018] The described ultra-precision free-form surface servo quick tooling device preferably has a reading head wire groove for accommodating the wire of the reading head and a tool holder photoelectric switch arranged on the pressing plate. The tool holder photoelectric switch is used to help the first driving mechanism find the zero position.

[0019] The described ultra-precision free-form surface servo quick tooling device preferably has the front end of the bearing track and the front end of the bottom plate connected by an elastic component.

[0020] The described elastic component preferably includes a spring seat, a long socket head cap screw, and a die spring. The die spring is sleeved on the long socket head cap screw. A cavity for accommodating the long socket head cap screw is arranged in the spring seat. The spring seat is fixed on the bearing track, and the long socket head cap screw penetrates through the bearing track and is embedded in the bottom plate.

[0021] Due to the adoption of the above technical solutions, the present invention has the following advantages:

[0022] (1) The cooling system of the present invention not only solves the temperature rise problem brought by the high-frequency movement of the voice coil motor, but also can ensure that each cooling hole acts precisely on the flank of the cutting edge by adjusting the blowing angle of the blowing copper tube. Compared with only cooling on the rake face, the flank cooling can increase the tool life by 60%.

[0023] (2) The present invention adopts a flexible connection structure, in which the flexible hinge provides a good angle rigidity, thereby reducing the deformation of the cutting tool caused by the force of the workpiece during the cutting process, thereby improving the processing accuracy; and the spring steel sheet not only balances the displacement change caused by the increase in the front end of the base plate with its own deformation characteristics, but also plays the role of a flexible connection, thereby reducing the influence of the servo cutting tool vibration and further improving the system accuracy. In addition, the base plate and bearing track fixed by it can make the tool rise when the push-pull rod moves backward, and lower the tool when the push-pull rod moves forward, thereby making the tool center height more accurate, while reducing the time cost of workers adjusting the tool center height, thereby improving the parts processing efficiency.

[0024] (3) The fixing mechanism with flexible hinge provided by the present invention realizes the guidance of the voice coil motor so that it can only move along the axis direction. The structure is compact, the mass of the moving part is small, and the system has good dynamic performance.

[0025] (4) The present invention adjusts and eliminates the possibility of the T-shaped block swinging in the left and right directions by setting an eccentric block, indirectly restricts the left and right swing of the base plate, improves the stability of the system, and reduces the impact of vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of a servo fast tool device provided by an embodiment of the present invention;

[0027] Figure 2 The right diagram of the servo fast knife device provided by this embodiment of the present invention;

[0028] Figure 3 A three-dimensional diagram of the servo fast knife device provided by the embodiment of the present invention from another angle;

[0029] Figure 4 A top view of the servo fast tool device provided in this embodiment of the present invention;

[0030] Figure 5 A cross-sectional view (gas path diagram) of the servo fast tool device provided for this embodiment of the present invention;

[0031] Figure 6 A schematic diagram of the servo quick knife device provided by the embodiment of the present invention being equipped with protection;

[0032] Figure 7 A diagram of a stepper motor driving component in a servo fast tool device provided in this embodiment of the present invention;

[0033] Figure 8 A schematic diagram of a base in a servo fast tool device provided in this embodiment of the present invention;

[0034] Fig. 9 A schematic diagram of a bottom plate in a servo fast tool device provided in this embodiment of the present invention;

[0035] The reference numerals in the figures are as follows:

[0036] 1-bearing track, 2-bottom plate, 3-base, 4-voice coil motor rotor, 5-voice coil motor stator, 6-motor fixing block, 7-spring steel sheet, 8-stepping motor fixing block, 9-ball screw stepping motor, 10-quick-insert air pipe connector, 11-pressure plate, 12-flexible hinge pressure block, 13-flexible hinge, 14-tool holder, 15-knife grain, 16-tool handle, 17-eccentric block, 18-short plug screw, 19-T block, 20-blowing copper tube, 21-tool holder photoelectric switch, 22-push-pull rod photoelectric switch, 23-push-pull rod, 24-bearing, 25-long plug screw, 26-mold spring, 27-spring seat, 28-grating ruler, 29-reading head, 30-reading head fixing block, 31-tool holder connecting rod, 32-transition block. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0038] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0039] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0040] In order to solve the defects of existing servo cutters, improve accuracy and reduce vibration, it is urgent to design a low-vibration and high-precision servo cutter to meet the needs of existing precision and ultra-precision CNC machine tools, so that the servo cutter can achieve the requirements of ultra-high precision, high response speed, high load, high rigidity, low vibration, low noise, smooth operation and long service life.

[0041] Based on the above technical problems, the present invention provides an ultra-precision free-form surface servo fast tool device, which is directly driven by a voice coil motor and fully closed-loop controlled by a linear grating scale. The servo turntable has the characteristics of ultra-high precision, high response speed, high load, high rigidity, low vibration, low noise, smooth operation and long service life.

[0042] The front end referred to in the present invention means that one end in the direction of movement of the servo knife is the front end, and the opposite direction is the rear end.

[0043] like Figure 1 As shown, the ultra-precision free-form surface servo fast tool device involved in the present invention includes: a base plate 2 and a bearing track 1, the rear end of the base plate 2 is fixed to the rear end of the bearing track 1 by an elastic member, and the front end of the base plate 2 is fastened to the bearing track 1 by a connecting block; a first driving mechanism and a base 3, both of which are fixed on the base plate 2, and the base 3 is provided with flexible hinges 13 at both ends of the front and rear ends of the first driving mechanism in the direction of travel, and the flexible hinges 13 are used to guide the first driving mechanism; a servo fast tool assembly is connected to the rotor of the first driving mechanism and reciprocates under the drive of the rotor; an air blowing copper tube 20 and a quick-plug air pipe connector 10 are respectively arranged at the front and rear ends of the base plate 2, and an air vent is provided in the base plate 2 for connecting the air blowing copper tube 20 and the quick-plug air pipe connector 10, and the cooling gas blown out of the air blowing copper tube 20 acts on the back face of the cutting edge.

[0044] Specifically, the present invention adopts two groups of spring steel sheets 7 as servo cutters guided by flexible hinges 13, which can achieve a movement stroke of 5 mm and meet most processing requirements. In addition, the cutter guided by flexible hinges 13 has a compact structure, a small mass of the moving part, and good system dynamic performance.

[0045] Furthermore, three quick-plug air pipe connectors 10 are installed at the rear end of the base plate 2. The filtered gas cools the tool through the quick-plug air pipe connector 10 and the ventilation channels inside the base plate 2 and the three blowing copper tubes 20 at the front end. By adjusting the blowing angle of the blowing copper tubes 20, it can be ensured that each cooling hole accurately acts on the back face of the cutting edge. Compared with cooling only on the front face, the back face cooling can increase the tool life by 60%.

[0046] Furthermore, if Figure 1As shown, the bottom plate 2 is fixed to the rear end of the bearing track 1 by the spring steel sheets 7 on the left and right sides of the rear end. The spring steel sheets 7 use their own deformation characteristics to balance the displacement change caused by the rise of the front end of the bottom plate 2, and play the role of flexible connection. The front end of the bottom plate 2 is tightly connected to the bearing track 1 through a connecting block. Specifically, the connecting block includes a T-block 19 and an eccentric block 17. The T-block 19 is fixed to the front end of the bottom plate 2. An eccentric block 17 is provided on each side of the T-block 19. The eccentric block 17 is fixed to the bearing track 1 by a short plug screw 18. The present invention cleverly eliminates the possibility of the T-block 19 swinging in the left and right directions by adjusting the eccentric block 17, and indirectly constrains the left and right swing of the bottom plate 2.

[0047] like Figure 1 , 3 As shown in , 4, and 9, the first driving mechanism is a voice coil motor, which is fixed to the bottom plate 2 through a motor fixing block 6. A vent is designed on the motor fixing block 6 and a quick-plug air pipe connector 10 is installed, which solves the temperature rise problem caused by the high-frequency movement of the voice coil motor. The voice coil motor includes a voice coil motor stator 5 and a voice coil motor rotor 4. The voice coil motor stator 5 is fixed on the motor fixing block 6, and the voice coil motor stator 5 is sleeved on the outside of the voice coil motor rotor 4. The voice coil motor is fixed on the motor fixing block 6, and the motor fixing block 6 and the base 3 are both fixed on the bottom plate 2. The bottom plate 2 is fixed to the tail of the bearing track 1 through the spring steel sheets 7 on the left and right sides of the tail. The spring steel sheet 7 uses its own deformation characteristics to balance the displacement change caused by the rise of the front end of the bottom plate 2, and plays a role of flexible connection.

[0048] like Figure 1 , 2 As shown in , 5, the servo fast tool assembly includes a tool holder connecting rod 31 and a tool holder 14 fixed on the tool holder connecting rod 31, the tool holder connecting rod 31 is connected to the rotor of the first driving mechanism through a transition block 32, a tool handle 16 is provided on the tool holder 14, and a tool particle 15 is provided on the tool handle 16.

[0049] Furthermore, if Figure 5 As shown, the servo fast tool assembly also includes a grating ruler 28 and a reading head 29 . The grating ruler 28 is fixed on the tool holder connecting rod 31 , and the reading head 29 is installed on the base 3 through a reading head fixing block 30 .

[0050] During the actual working process, after the voice coil motor is powered on, the current causes the rotor 4 of the voice coil motor to move back and forth. The rotor 4 of the voice coil motor drives the transition block 32, the tool post connecting rod 31, and the two groups of flexible hinges (spring steel sheets 7) 13 at both ends thereof, the tool post 14, as well as the tool holder 16 and the cutting insert 15 to move reciprocally. The grating scale 28 is fixed on the tool post connecting rod 31 and moves synchronously therewith. The reading head 29 is installed on the base 3 through the reading head fixing block 30. The distance control driven by the voice coil motor and the position feedback of the grating scale 28 form a full closed-loop control of the servo quick tool, realizing high precision. The quick tool servo driven directly by the voice coil motor is small in volume and has no hysteresis, meeting the characteristics of fast response speed, high acceleration, wide frequency response range, high load, and easy control.

[0051] Further, as Figure 1 、 5 、8 show, the base 3 is in a "匸"-shaped structure. The flexible hinges 13 are respectively installed at the front and rear ends of the base 3, and the side surface of the base 3 is encapsulated by the pressing plate 11.

[0052] The base 3, as a fixed mechanism for high-speed and high-precision displacement output, is installed with the pressing plate 11 to form a cuboid structure. The conventional base 3 is assembled by four pressing plates 11, but in order to improve the rigidity, the upper, lower, and left three pressing plates 11 are combined into 1 base. The two groups of flexible hinges 13 (spring steel sheets 7) are respectively installed at the front and rear ends of the base 3 and fixed by the flexible hinge pressing blocks 12, thereby realizing the guiding of the voice coil motor and enabling it to move only along the axial direction. This structure is compact, the moving part has a small mass, and the dynamic performance of the system is good. At the same time, the two groups of flexible hinges 13 with a relatively large distance can provide good angular stiffness, reduce the deformation of the quick tool during cutting under the action of the workpiece force, and improve the machining accuracy. In addition, a reading head wire groove is specially designed on the pressing plate 11, which protects the wire while making the quick tool device simple and beautiful after installing the protective cover. The tool post photoelectric switch 21 is installed on the pressing plate 11 to help the voice coil motor mover 4 find the zero position.

[0053] Among them, a motor cooling hole is provided on the flexible hinge pressing block 12 for cooling the voice coil motor.

[0054] As Figure 1 、 6 、7 show, the ultra-precision free-form surface servo quick tool device of the present invention further includes a second driving mechanism, which is installed at the rear end of the bearing track 1. A push-pull rod 23 is arranged in the bearing track 1. The rear end of the push-pull rod 23 is connected to the lead screw nut of the second driving mechanism. Four bearings 24 are installed at the front end of the push-pull rod 23. The upper two bearings 24 are in contact with the inclined surface below the bottom plate 2, and the lower two bearings 24 are in contact with the upper surface of the bearing track 1.

[0055] Specifically, the second driving mechanism is a ball screw stepper motor 9, which is connected to the stepper motor fixing block 8 and installed at the rear end of the bearing track 1. The push-pull rod photoelectric switch 22 is installed at the middle and rear part of the bearing track 1 to help the ball screw stepper motor 9 find the zero position. The rear end of the push-pull rod 23 is connected to the screw nut, and four bearings 24 are installed at the front end of the push-pull rod 23. The upper two bearings are in contact with the inclined surface below the bottom plate 2, and the lower two are in contact with the upper surface of the bearing track 1. In addition to the supporting function, the four bearings 24 can also be driven by the motor push-pull rod 23 to slide back and forth on the bearing track 1. Because the rear ends of the bottom plate 2 and the bearing track 1 are fixed with spring steel sheets 7, the tool rises when the push-pull rod 23 moves backward, and the tool lowers when the push-pull rod 23 moves forward. Through system control, the tool center height can be made more accurate, while reducing the time cost of workers adjusting the tool center height, thereby improving the efficiency of parts processing.

[0056] like Figure 5 As shown, the front end of the bearing track 1 and the front end of the bottom plate 2 are also connected by an elastic component. Specifically, the elastic component includes a spring seat 27, a long plug screw 25 and a mold spring 26. The mold spring 26 is sleeved on the long plug screw 25. A cavity for accommodating the long plug screw 25 is provided in the spring seat 27. The spring seat 27 is fixed on the bearing track 1. The long plug screw 25 passes through the bearing track 1 and is embedded in the bottom plate 2.

[0057] The ultra-precision free-form surface servo fast tool device of the present invention has a simple appearance and structure, with a length, width and height of only 250x95x145. The compact design saves valuable tool space, is easy to use, and the moving parts are silver-white anodized, bright and beautiful, giving the processor a visual enjoyment. Figure 1 , 6 shown.

[0058] The ultra-precision free-form surface servo tool device of the present invention can solve the defects of the vibration of the existing servo tool, improve the accuracy of the servo tool, reduce vibration, meet the needs of the existing precision and ultra-precision CNC machine tools, and make the servo turntable meet the requirements of ultra-high precision, high response speed, high load, high rigidity, low vibration, low noise, smooth operation and long service life. It can be widely used in ultra-precision CNC machine tools, such as lathes and five-axis machine tools.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultra-precision free-form surface servo fast tool device, characterized in that: Comprising: A bottom plate (2) and a bearing track (1), the rear end of the bottom plate (2) is fixed to the rear end of the bearing track (1) by an elastic member, and the front end of the bottom plate (2) is fixedly connected to the bearing track (1) through a connecting block; A first driving mechanism and a base (3), both of which are fixed on the bottom plate (2). Flexible hinges (13) are provided at both the front and rear ends of the base (3) in the advancing direction of the first driving mechanism, and the flexible hinges (13) are used to guide the first driving mechanism; A servo quick tooling component, connected to the rotor of the first driving mechanism and reciprocating under the drive of the rotor; A blowing copper tube (20) and a quick-connect pneumatic tube joint (10), respectively arranged at the front end and the rear end of the bottom plate (2). An air vent passage is provided in the bottom plate (2) for connecting the blowing copper tube (20) and the quick-connect pneumatic tube joint (10), and the cooling gas blown out by the blowing copper tube (20) acts on the rear tool face of the cutting edge.

2. The ultra-precision free-form surface servo fast tool device according to claim 1, characterized in that: The servo quick tooling component includes a tool holder connecting rod (31) and a tool holder (14) fixed on the tool holder connecting rod (31). The tool holder connecting rod (31) is connected to the rotor of the first driving mechanism through a transition block (32). A tool shank (16) is provided on the tool holder (14), and a cutting insert (15) is provided on the tool shank (16).

3. The ultra-precision free-form surface servo fast tool device according to claim 2, characterized in that: The servo quick tooling component further includes a grating scale (28) and a reading head (29). The grating scale (28) is fixed on the tool holder connecting rod (31), and the reading head (29) is installed on the base (3) through a reading head fixing block (30).

4. The ultra-precision free-form surface servo fast tool device according to claim 1, characterized in that: The connecting block includes a T-shaped block (19) and an eccentric block (17). The T-shaped block (19) is fixed to the front end of the bottom plate (2), and an eccentric block (17) is provided on each side of the T-shaped block (19). The eccentric block (17) is fixed to the bearing track (1) by a short plugging screw (18).

5. The ultra-precision free-form surface servo fast tool device according to claim 1, characterized in that: It further includes a second driving mechanism, installed at the rear end of the bearing track (1). A push-pull rod (23) is provided in the bearing track (1). The rear end of the push-pull rod (23) is connected to the lead screw nut of the second driving mechanism. At least 4 bearings (24) are installed at the front end of the push-pull rod (23). The upper two bearings (24) are in contact with the inclined surface below the bottom plate (2), and the lower two bearings (24) are in contact with the upper surface of the bearing track (1).

6. The ultra-precision free-form surface servo fast tool device according to claim 5, characterized in that: A push-pull rod photoelectric switch (22) is further provided on the bearing track (1) for helping the second driving mechanism to find the zero position.

7. The ultra-precision free-form surface servo fast tool device according to claim 3, characterized in that: The base (3) is in a "匸"-shaped structure. The flexible hinges (13) are respectively installed at the front and rear ends of the base (3), and the side surface of the base (3) is encapsulated by a pressing plate (11).

8. The ultra-precision free-form surface servo fast tool device according to claim 7, characterized in that: The pressing plate (11) is provided with a reading head wire groove for accommodating the wire of the reading head (29) and a tool holder photoelectric switch (21). The tool holder photoelectric switch (21) is used to help the first driving mechanism to find the zero position.

9. The ultra-precision free-form surface servo fast tool device according to claim 1, characterized in that: The front end of the bearing track (1) and the front end of the base plate (2) are also connected via an elastic component.

10. The ultra-precision free-form surface servo fast tool device according to claim 1, characterized in that: The elastic component comprises a spring seat (27), a long plug screw (25) and a mold spring (26); the mold spring (26) is sleeved on the long plug screw (25); a cavity for accommodating the long plug screw (25) is arranged in the spring seat (27); the spring seat (27) is fixed on the bearing track (1); the long plug screw (25) passes through the bearing track (1) and is embedded in the base plate (2).

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