Fast knife servo driving structure capable of balancing dead weight influence of rotor

Abstract

The utility model provides a fast knife servo driving structure capable of balancing the dead weight influence of a rotor. The fast knife servo driving structure comprises a voice coil motor, a front driving guide rail piece and a rear balancing guide rail piece, the front driving guide rail piece and the rear balancing guide rail piece are of the same structure and each comprise a rod body and a sleeve, and the rod bodies are sleeved with the sleeves. The sleeve and a shell of the voice coil motor are fixed parts, a rotor of the shell of the voice coil motor is a movable part, and the rod body and the rotor are coaxial; the rod body rear end of the front driving guide rail piece is connected with the rotor front end; the rod body front end of the rear balance guide rail piece is connected with the rotor rear end; the front end of a rod body of the front driving guide rail piece is provided with a guide rail structure adopting a front-back support, the rod body of the front driving guide rail piece, the rotor and a rod body of the rear balance guide rail piece are sequentially connected and are coaxial, and the front rod body and the rear rod body jointly bear the self weight of the rotor of the voice coil motor, so that the overall gravity distribution of the device is more reasonable; the influence of the dead weight of the rotor during high-speed operation of the voice coil motor can be reduced, and the machining precision can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-precision machining mechanical equipment, in particular to a fast tool servo drive structure capable of balancing the influence of the deadweight of a mover. Background Art

[0002] Optical free-form surfaces have many outstanding advantages in improving the performance of optical systems, simplifying system structures, improving system imaging quality, reducing the number and weight of system parts, and improving product design. With the progress and development of optoelectronic science and technology, optical free-form surfaces have increasingly important application value and broad application prospects in many fields such as aerospace, civil, national defense and military.

[0003] Ultra-precision turning technology is very promising for ultra-precision manufacturing of complex-shaped optical components. It has the advantages of high precision, high efficiency, and the ability to obtain mirror-quality surfaces in one turning operation. It has been widely used in the processing of complex parts such as optical free-form surfaces, micro-nanostructure functional surfaces, and non-circular parts. Among them, Fast Tool Servo (FTS) technology is the most commonly used ultra-precision turning method.

[0004] The existing fast knife servo device adopts a single-sided guide rail to connect the voice coil motor's driving structure. This structural design does not balance the gravity of the motor's mover itself, and the mover's center of gravity is not located at the center position of the guide rail. Therefore, the mover's gravity will be applied to the guide rail to form an eccentric load. In the high-frequency response state, the existence of the eccentric load will have an adverse effect on the overall performance of the fast knife servo device. Utility Model Content

[0005] In order to overcome the problems existing in the related technology, the utility model provides a fast tool servo drive structure that can balance the influence of the deadweight of the mover. The deadweight of the mover of the voice coil motor is jointly borne by the front and rear rods, so that the overall gravity distribution of the device is more reasonable, which can reduce the influence of the deadweight of the mover on the device and is conducive to improving the processing accuracy.

[0006] The purpose of the utility model is to provide a fast tool servo drive structure that can balance the influence of the deadweight of the mover:

[0007] It includes a voice coil motor, a front driving guide rail and a rear balancing guide rail;

[0008] The front driving guide rail member and the rear balancing guide rail member are symmetrically arranged at the front and rear sides of the voice coil motor;

[0009] The front driving guide rail member and the rear balancing guide rail member have the same structure, both comprising a rod body and a sleeve, wherein the sleeve is sleeved outside the rod body;

[0010] The sleeve and the housing of the voice coil motor are fixed parts, the mover of the housing of the voice coil motor is a moving part, and the rod body is coaxial with the mover;

[0011] The rear end of the rod body of the front driving guide rail member is connected to the front end of the mover, and the front end of the rod body of the rear balancing guide rail member is connected to the rear end of the mover;

[0012] A cutter is installed at the front end of the rod body of the front driving guide rail member.

[0013] In a preferred technical solution of the utility model, the sleeve is fixedly mounted on the base, a liquid channel is arranged inside the sleeve, a liquid floating matching part matching with the side wall of the rod body is arranged on the inner wall of the sleeve, the liquid floating matching part includes an oil groove, an oil sealing edge is arranged on the outer peripheral side of the oil groove, an oil return channel is arranged on the outer peripheral side of the oil sealing edge, the sleeve has an oil inlet, and the oil inlet is connected to the oil groove through the liquid channel;

[0014] The oil sealing edge is clearance-matched with the side wall of the rod body, and an oil film gap is formed between the oil sealing edge and the side wall of the rod body.

[0015] In a preferred technical solution of the utility model, an oil outlet is provided in the middle of the bottom of the oil tank, a throttle is provided in the oil outlet, and the oil inlet is connected to the oil outlet via a liquid channel.

[0016] In a preferred technical solution of the utility model, the sleeve includes an upper block, a lower block and a side block;

[0017] Two side blocks are arranged between the upper block and the lower block at intervals on the left and right sides;

[0018] The upper block is connected to the lower block via the side block, and the upper block, the lower block and the two side blocks form a support hole for the guide rod to pass through;

[0019] The upper block, the lower block and the side block are all provided with a liquid floating matching part in the middle of the side facing the guide rod.

[0020] In a preferred technical solution of the utility model, the sleeve and the voice coil motor are mounted on a base, and an oil collecting groove is provided on the base.

[0021] In a preferred technical solution of the utility model, a first cooling channel is arranged in the sleeve, and a first cooling liquid inlet and a first cooling liquid outlet connected to the first cooling channel are provided on the sleeve.

[0022] In a preferred technical solution of the present utility model, the voice coil motor has a second cooling channel, and the voice coil motor has a second cooling liquid inlet and a second cooling liquid outlet connected to the second cooling channel.

[0023] In a preferred technical solution of the utility model, the tool is installed at the front end of the front guide rod via a tool holder.

[0024] In a preferred technical solution of the utility model, the rod body is connected to the mover via a connecting block.

[0025] In a preferred technical solution of the utility model, rubber anti-collision blocks are installed around the connecting block.

[0026] In a preferred technical solution of the utility model, the front liquid floating support assembly and the rear liquid floating support assembly are structurally symmetrically arranged on both sides of the voice coil motor.

[0027] The beneficial effects of the utility model are:

[0028] A front and rear supported guide rail structure is adopted. The rod body of the front driving guide rail component, the mover and the rod body of the rear balancing guide rail component are connected in sequence and are coaxial. The front and rear two rod bodies jointly bear the deadweight of the mover of the voice coil motor, making the overall gravity distribution of the device more reasonable, which can reduce the influence of the deadweight of the mover when the voice coil motor runs at high speed, and is conducive to improving the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of a fast tool servo drive structure that can balance the influence of the mover's own weight.

[0030] Figure 2 It is a structural cross-sectional view of a fast tool servo drive structure that can balance the influence of the mover's own weight.

[0031] Figure 3 It is a schematic diagram of the structure of the sleeve.

[0032] Figure 4 It is a structural schematic diagram of a liquid floating matching part;

[0033] Reference numerals:

[0034] 100, base; 110, oil collecting groove; 200, voice coil motor; 210, grating reading head; 220, scale grating; 230, mover; 240, second cooling channel; 300, front drive guide rail; 310, tool holder; 320, tool; 400, connecting block; 500, rear balance guide rail; 600, rubber anti-collision block; 700, rod body; 710, oil return groove; 800, sleeve; 810, liquid channel; 820, liquid floating fitting part; 821, oil groove; 822, oil outlet; 823, oil sealing edge; 824, oil return channel; 830, upper block; 840, lower block; 850, side block; 860, first cooling channel. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0036] The existing fast knife servo device adopts a single-sided guide rail to connect the voice coil motor's driving structure. This structural design does not balance the gravity of the motor's mover itself, and the mover's center of gravity is not located at the center position of the guide rail. Therefore, the mover's gravity will be applied to the guide rail to form an eccentric load. In the high-frequency response state, the existence of the eccentric load will have an adverse effect on the overall performance of the fast knife servo device.

[0037] Example

[0038] In response to the above problems, the present embodiment provides a fast tool servo drive structure that can balance the influence of the deadweight of the mover 230. The deadweight of the mover 230 of the voice coil motor 200 is jointly borne by the front and rear rods 700, so that the overall gravity distribution of the device is more reasonable, which can reduce the influence of the deadweight of the mover 230 on the device and is conducive to improving the processing accuracy.

[0039] like Figure 1-4 As shown, a fast tool servo drive structure capable of balancing the influence of the deadweight of the mover 230:

[0040] It includes a voice coil motor 200, a front driving guide rail member 300 and a rear balancing guide rail member 500;

[0041] The front driving guide rail member 300 and the rear balancing guide rail member 500 are symmetrically arranged at the front and rear sides of the voice coil motor 200;

[0042] The front driving guide rail member 300 and the rear balancing guide rail member 500 have the same structure, and both include a rod body 700 and a sleeve 800, wherein the sleeve 800 is sleeved outside the rod body 700; the sleeve 800 has a supporting hole portion adapted to the rod body 700, and the rod body 700 passes through the supporting hole portion. Preferably, the rod body 700 is a square rod;

[0043] The sleeve 800 and the housing of the voice coil motor 200 are fixed parts, the rod body 700 and the mover 230 of the housing of the voice coil motor 200 are moving parts, and the rod body 700 and the mover 230 are coaxial;

[0044] The rear end of the rod body 700 of the front driving guide rail member 300 is connected to the front end of the mover 230, and the front end of the rod body 700 of the rear balancing guide rail member 500 is connected to the rear end of the mover 230;

[0045] A cutter 320 is installed at the front end of the rod body 700 of the front driving guide rail member 300 .

[0046] The fast tool servo drive structure that instinctively balances the influence of the deadweight of the mover 230 adopts a front and rear supported guide rail structure. The rod body 700 of the front driving guide rail member 300, the mover 230 and the rod body 700 of the rear balancing guide rail member 500 are connected in sequence and are coaxial. The deadweight of the mover 230 of the voice coil motor 200 is jointly borne by the front and rear rod bodies 700, so that the overall gravity distribution of the device is more reasonable, which can reduce the influence of the deadweight of the mover 230 when the voice coil motor 200 runs at high speed, and is conducive to improving the processing accuracy.

[0047] In this embodiment, the sleeve 800 is fixedly mounted on the base 100, a liquid channel 810 is provided in the sleeve 800, a liquid floating matching portion 820 matching with the side wall of the rod body 700 is provided on the inner wall of the sleeve 800, the liquid floating matching portion 820 includes an oil groove 821, an oil sealing edge 823 is provided on the outer peripheral side of the oil groove 821, an oil return channel 824 is provided on the outer peripheral side of the oil sealing edge 823, and the sleeve 800 has an oil inlet, which is connected to the oil groove 821 through the liquid channel 810;

[0048] The oil sealing edge 823 is matched with the side wall of the rod body 700 in a clearance, and an oil film gap is formed between the oil sealing edge 823 and the side wall of the rod body 700.

[0049] In this embodiment, an oil outlet 822 is provided in the middle of the bottom of the oil groove 821 , a throttle is provided in the oil outlet 822 , and the oil inlet is connected to the oil outlet 822 via the liquid channel 810 .

[0050] In this embodiment, the sleeve 800 includes an upper block 830, a lower block 840 and a side block 850;

[0051] Two side blocks 850 are arranged between the upper block 830 and the lower block 840 at intervals on the left and right sides;

[0052] The upper block 830 is connected to the lower block 840 via the side block 850. The upper block 830, the lower block 840 and the two side blocks 850 form a support hole for the guide rod to pass through.

[0053] The upper block 830 , the lower block 840 and the side block 850 are all provided with a liquid floating matching portion 820 in the middle of the side facing the guide rod.

[0054] When in use, the high-pressure oil is first throttled by the throttle, then enters the oil tank 821 for oil collection and pressure maintenance, and finally flows out to the external environment through the oil sealing edge 823. In order to make the hydraulic guide rail have high bearing capacity and high rigidity, a higher pressure oil can be used. At the same time, by setting a cooling channel, the heat generated by the high-pressure oil can be taken away by the coolant, thereby reducing the adverse effects of temperature changes on the stability of the guide rail.

[0055] In this embodiment, the sleeve 800 and the voice coil motor 200 are mounted on a base 100 , and an oil collecting groove 110 is disposed on the base 100 . The oil collecting groove 110 has an output port, and preferably, the output port is disposed at the bottom of the oil collecting groove 110 .

[0056] When in use, the hydraulic station is used to deliver oil of a certain pressure to the liquid channel 810 in the sleeve 800, and the oil flows into each block through the liquid channel 810. The oil flows through the throttle, the oil groove 821, and the oil sealing edge 823 in each block in turn, thereby forming a pressure oil film with the side wall of the rod body 700, generating a certain bearing capacity and rigidity, so that the guide rod floats stably in the center position of the sleeve 800; after flowing out of the sleeve 800, the oil flows into the base 100 at the bottom, and flows to the output through the oil collection groove 110; the return oil grooves 710 on the sides of the two ends of the rod body 700 can prevent the hydraulic oil from flowing out along the rod body 700 and contaminating other parts.

[0057] In this embodiment, the operation characteristic of the fast tool servo device is small displacement and high frequency reciprocating movement. In order to prevent the temperature increase of the sleeve 800 from affecting the guide rail performance when the front guide rod and the rear guide rod move quickly, a first cooling channel 860 is arranged in the sleeve 800, and the sleeve 800 has a first coolant inlet and a first coolant outlet connected to the first cooling channel 860.

[0058] In this embodiment, in order to prevent the voice coil motor 200 from continuously working at a higher temperature and affecting its performance, the voice coil motor 200 has a second cooling channel 240 , and the voice coil motor 200 has a second cooling liquid inlet and a second cooling liquid outlet connected to the second cooling channel 240 .

[0059] In practical applications, a water cooling station is used to input a coolant with a constant temperature into the cooling channels of the sleeve 800 and the outer shell of the voice coil motor 200, and the coolant is used to take away the heat generated by the sleeve 800 and the voice coil during operation, thereby suppressing the temperature rise of the voice coil motor 200 and the sleeve 800, so that the voice coil motor 200 and the sleeve 800 can continue to operate at a high response.

[0060] In this embodiment, the tool 320 is installed at the front end of the front guide rod via the tool holder 310 .

[0061] In this embodiment, the rod body 700 is connected to the mover 230 via the connecting block 400 .

[0062] In this embodiment, a rubber anti-collision block 600 is installed around the connecting block 400 to prevent the voice coil motor 200 from over-travel and damaging parts.

[0063] In a preferred technical solution of the present utility model, the front liquid floating support assembly and the rear liquid floating support assembly are symmetrically arranged on both sides of the voice coil motor 200.

[0064] In this embodiment, the fast tool servo drive structure that can balance the influence of the deadweight of the mover 230 also includes a grating ruler, a grating reading head 210 of the grating ruler is installed on the housing of the voice coil motor 200, and a scale grating 220 of the grating ruler is installed on the connecting block 400 between the front drive guide rail 300 and the voice coil motor 200.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0066] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0069] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fast tool servo drive structure capable of balancing the influence of the deadweight of the mover, characterized in that: It includes a voice coil motor, a front driving guide rail and a rear balancing guide rail; The front driving guide rail member and the rear balancing guide rail member are symmetrically arranged at the front and rear sides of the voice coil motor; The front driving guide rail member and the rear balancing guide rail member have the same structure, both comprising a rod body and a sleeve, wherein the sleeve is sleeved outside the rod body; The sleeve and the housing of the voice coil motor are fixed parts, the mover of the housing of the voice coil motor is a moving part, and the rod body is coaxial with the mover; The rear end of the rod body of the front driving guide rail member is connected to the front end of the mover, and the front end of the rod body of the rear balancing guide rail member is connected to the rear end of the mover; A cutter is installed at the front end of the rod body of the front driving guide rail member.

2. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 1 is characterized in that: The sleeve is fixedly mounted on the base, a liquid channel is arranged inside the sleeve, a liquid floating matching part matching with the side wall of the rod body is arranged on the inner wall of the sleeve, the liquid floating matching part includes an oil groove, an oil sealing edge is arranged on the outer peripheral side of the oil groove, an oil return channel is arranged on the outer peripheral side of the oil sealing edge, the sleeve has an oil inlet, and the oil inlet is connected to the oil groove through the liquid channel; The oil sealing edge is clearance-matched with the side wall of the rod body, and an oil film gap is formed between the oil sealing edge and the side wall of the rod body.

3. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 2 is characterized in that: An oil outlet is arranged in the middle of the bottom of the oil tank, a throttle is arranged in the oil outlet, and the oil inlet is connected to the oil outlet through a liquid channel.

4. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 3 is characterized in that: The sleeve comprises an upper block, a lower block and a side block; Two side blocks are arranged between the upper block and the lower block at intervals on the left and right sides; The upper block is connected to the lower block via the side block, and the upper block, the lower block and the two side blocks form a support hole for the guide rod to pass through; The upper block, the lower block and the side block are all provided with a liquid floating matching part in the middle of the side facing the guide rod.

5. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 2, characterized in that: An oil collecting groove is arranged on the base.

6. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 2, characterized in that: A first cooling channel is arranged in the sleeve, and a first cooling liquid inlet and a first cooling liquid outlet connected to the first cooling channel are provided on the sleeve.

7. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 1, characterized in that: The voice coil motor has a second cooling channel, and the voice coil motor has a second cooling liquid inlet and a second cooling liquid outlet connected to the second cooling channel.

8. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 1, characterized in that: The tool is installed at the front end of the front guide rod via a tool holder.

9. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 1, characterized in that: The rod body is connected to the mover via a connecting block.

10. The fast tool servo drive structure capable of balancing the influence of the deadweight of the mover according to claim 9, characterized in that: A rubber anti-collision block is installed around the connecting block.

Images