CN114750050A

CN114750050A - Five aspheric surfaces polishing lathe

Info

Publication number: CN114750050A
Application number: CN202210558523.2A
Authority: CN
Inventors: 徐乐
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-22
Filing date: 2022-05-22
Publication date: 2022-07-15

Abstract

The invention discloses a five-axis aspheric polishing machine tool, which belongs to the technical field of optical processing and adopts a novel structure and comprises a base, an X-axis control unit, an XB-axis connecting table, a B-axis control unit, a main shaft control unit, a Z-axis control unit, a ZC-axis connecting table, a C-axis control unit and the like, wherein each unit can independently and accurately work, the load required to be overcome by each dimension movement is obviously reduced, and the torque and the control cost of a motor are reduced. In addition, the B axis in the scheme is not limited by other axes, and the motion of 0-360 degrees can be realized, so that the f number of the machinable free-form surface is as small as possible and even exceeds a hemisphere. Compared with the prior art, the polishing machine tool for the optical aspheric lens is light in weight, low in cost and high in precision, can meet the processing requirements of different optical aspheric lenses, and greatly improves the processing efficiency.

Description

Five aspheric surface polishing machine tools

Technical Field

The invention belongs to the technical field of optical machining, and particularly relates to a five-axis aspheric surface polishing machine tool.

Background

With the development of artificial intelligence and intelligent automobiles and the trend of competition in the big country towards high-tech competitions, the lens is developed towards higher precision and larger visual angle as the extension of human eyes. Aspheric lenses are increasingly used by designers as an essential component of excellent optical design schemes, but the difficulty in manufacturing optical aspheric lenses is high, so that polishing equipment capable of manufacturing optical aspheric lenses becomes a key problem. In order to achieve the purpose of polishing the optical aspheric surface, a multi-axis linkage function must be realized, and in order to achieve the processing precision, an alignment processing method must be utilized.

In the prior art, an aspheric surface polishing machine tool has a complex structure and high manufacturing cost, and the f number of a free-form surface processed by the aspheric surface polishing machine tool is greatly limited. Although some technicians design a novel polishing device and a novel polishing method for an optical free-form surface, a transmission structure is improved, X, Y shafts are loaded on the B shaft, the C shaft is loaded on the Y shaft, and the Z shaft moves independently, the scheme still has the defects of complex structure, large B shaft load, and too small swing amplitude of the B shaft, so that the f number of a machinable aspheric surface is not too small, and the market demand of an aspheric surface polishing machine tool cannot be met.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a light-weight and low-cost optical aspheric lens polishing machine tool, each unit of which can independently and accurately work, so as to significantly reduce the load to be overcome by each dimension of motion, and reduce the torque and control cost of a motor. In addition, the B axis in the scheme is not limited by other axes, and the motion of 0-360 degrees can be realized, so that the f number of the machinable free-form surface is as small as possible and even exceeds a hemisphere.

The invention solves the problems through the following technical means:

the utility model provides a five-axis aspheric surface polishing machine tool, its characterized in that connects platform, B axle the control unit, main shaft the control unit, Z axle the control unit, ZC axle connects platform and C axle the control unit including base, X axle the control unit, XB axle, wherein: the top of the base is provided with a transverse groove, the side surface of the base is provided with a vertical groove, the top of the vertical groove is provided with a transmission port, and a rotating shaft table is arranged in the transverse groove; the X-axis control unit is arranged in the transverse groove and connected with the XB axis connecting table, the B-axis control unit is arranged on the XB axis connecting table, and the X-axis control unit is used for driving the XB axis connecting table and the B-axis control unit to move back and forth along the X-axis direction; the spindle control unit is arranged on the B-axis control unit, and the B-axis control unit drives the spindle control unit to rotate and swing around the B axis; the Z-axis control unit is arranged in the vertical groove and connected with the ZC axis connecting table, the C-axis control unit is arranged on the ZC axis connecting table, and the Z-axis control unit is used for driving the ZC axis connecting table and the C-axis control unit to move up and down along the C-axis direction; the axis of the X-axis control unit is perpendicular to the axis of the C-axis control unit, the axis of the main shaft control unit is coaxial with the axis of the C-axis control unit, and the axis of the Z-axis control unit is parallel to the axis of the C-axis control unit.

Preferably, the X-axis control unit includes an X-axis motor, an X-axis coupler, an X-axis screw, and an X-axis guide rail, wherein: the X-axis motor is arranged on the mounting plate at the tail end of the transverse groove; an output shaft of the X-axis motor is connected with an X-axis screw through an X-axis coupler; the X-axis screw rod is rotatably arranged in the rotating shaft table; the X-axis guide rails are symmetrically arranged on two sides of the transverse groove.

Preferably, the bottom of the XB shaft connecting platform is provided with a sliding chute, and the sliding chute is movably sleeved on the X-axis guide rail.

Preferably, the B-axis control unit comprises a B-axis mounting table, a B-axis threaded hole, a B-axis motor and a B-axis rotating plate, wherein: the B-axis mounting table is detachably mounted at the top of the XB-axis connecting table; the bottom of the B-axis mounting table is provided with a B-axis threaded hole, the B-axis threaded hole is sleeved on the X-axis screw, and the B-axis threaded hole and the X-axis screw work in a matched mode to form a screw rod structure; the B-axis motor is arranged on the B-axis mounting table; the B-axis rotating plate is arranged on a rotating shaft of the B-axis motor and can rotate along with the rotating shaft.

Preferably, the spindle control unit includes a spindle mounting table, a spindle motor and a connector, wherein: the main shaft mounting table is detachably and vertically arranged at the tail end of the B-axis rotating plate; the spindle motor is detachably and vertically arranged in the spindle mounting table; the connector is arranged on a rotating shaft of the spindle motor and is used for connecting a polishing wheel, a polishing ball or a cutter; and a polishing solution channel is formed in the spindle mounting table.

Preferably, the Z-axis control unit includes a Z-axis motor, a Z-axis coupler, a Z-axis screw, and a Z-axis guide rail, wherein: the Z-axis motor is arranged at the bottom of the vertical groove; an output shaft of the Z-axis motor is connected with a Z-axis screw through a Z-axis coupler; the Z-axis guide rails are symmetrically arranged on bosses on two sides in the vertical groove.

Preferably, ZC hub connection platform is L type sheet metal structure, and the bottom bilateral symmetry of ZC hub connection platform is provided with Z axle slider, and the bottom middle part of ZC hub connection platform is provided with Z axle nut, wherein: the Z-axis sliding block is movably sleeved on the Z-axis guide rail; the Z-axis nut is sleeved on the Z-axis screw, and the Z-axis nut and the Z-axis screw work in a matched mode to form a screw rod structure.

Preferably, the C-axis control unit includes a C-axis motor, a hydraulic chuck and a negative pressure air path, wherein: the C-axis motor is arranged on the ZC shaft connecting table; the hydraulic chuck is arranged on a rotating shaft of the C-axis motor and is used for fixing an optical workpiece or a tool clamp; and a negative pressure gas circuit is arranged in the middle of the C-axis motor.

The five-axis aspheric surface polishing machine tool has the following beneficial effects:

(1) x axle, B axle and main shaft form one set of independent motion in this scheme, and this motion mainly is responsible for the motion of rubbing head, and Z axle and C axle form one set of independent motion, mainly is responsible for the installation and the motion of work piece, and the tuning of the lathe of being convenient for of this design.

(2) In the scheme, the movement mechanism is split as much as possible, the load required to be overcome by each movement is reduced, the torque of the motor is reduced, and therefore the cost is lower. And the B axis is not limited by other axes and can move at 0-360 degrees, so that the f number of the free curved surface which can be processed is as small as possible and even exceeds a hemisphere.

(3) In the scheme, the accurate angle and feed amount control can be realized, the flexibility of movement is improved, the manufacturing cost is reduced, and in addition, the machine tool also has good working reliability.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the backside structure of the present invention;

FIG. 3 is a schematic structural diagram of a B-axis control unit and a spindle control unit according to the present invention;

FIG. 4 is a schematic view of a Z-axis control unit and a ZC axis connection station according to the invention;

FIG. 5 is a schematic structural diagram of a C-axis control unit according to the present invention.

Wherein, 1-base, 101-horizontal groove, 102-vertical groove, 103-driving port, 104-rotating shaft table, 105-mounting plate, 2-X shaft control unit, 201-X shaft motor, 202-X shaft coupler, 203-X shaft screw, 204-X shaft guide rail, 3-XB shaft connecting table, 4-B shaft control unit, 401-B shaft mounting table, 402-B shaft threaded hole, 403-B shaft motor, 404-B shaft rotating plate, 5-main shaft control unit, 501-main shaft mounting table, 502-main shaft motor, 503-connector, 6-Z shaft control unit, 601-Z shaft motor, 602-Z shaft coupler, 603-Z shaft screw, 604-Z shaft guide rail, 7-ZC shaft connecting table, 701-Z shaft slide block, 702-Z shaft nut, 8-C shaft control unit, 801-C shaft motor, 802-hydraulic chuck and 803-negative pressure air path.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the five-axis aspheric surface polishing machine tool comprises a base 1, an X-axis control unit 2, an XB axis connection table 3, a B-axis control unit 4, a spindle control unit 5, a Z-axis control unit 6, a ZC axis connection table 7 and a C-axis control unit 8, wherein a transverse groove 101 is formed in the top of the base 1, the transverse groove 101 is a through groove, a vertical groove 102 is formed in the side surface of the base 1, a transmission port 103 is formed in the top of the vertical groove 102, the transmission port 103 facilitates the C-axis control unit 8 to pass through from top to bottom, a rotating shaft table 104 is arranged inside the transverse groove 101, and a bearing seat is arranged inside the rotating shaft table 104.

In the figure, an X-axis control unit 2 is arranged in a transverse groove 101 and connected with an XB axis connecting platform 3, a B-axis control unit 4 is arranged on the XB axis connecting platform 3, and the X-axis control unit 2 is used for driving the XB axis connecting platform 3 and the B-axis control unit 4 to move back and forth along the X-axis direction; the main shaft control unit 5 is arranged on the B-axis control unit 4, and the B-axis control unit 4 drives the main shaft control unit 5 to rotate and swing around the B axis; the Z-axis control unit 6 is arranged in the vertical groove 102 and connected with the ZC axis connecting platform 7, the C-axis control unit 8 is arranged on the ZC axis connecting platform 7, and the Z-axis control unit 6 is used for driving the ZC axis connecting platform 7 and the C-axis control unit 8 to move up and down along the C-axis direction; the axis of the X-axis control unit 2 is perpendicular to the axis of the C-axis control unit 8, the axis of the main shaft control unit 5 is coaxial with the axis of the C-axis control unit 8, and the axis of the Z-axis control unit 6 is parallel to the axis of the C-axis control unit 8.

It should be noted that in the scheme, the X axis, the B axis and the main shaft form a set of independent motion mechanism, the motion mechanism is mainly responsible for the motion of the polishing head, the Z axis and the C axis form a set of independent motion mechanism which is mainly responsible for the installation and the motion of the workpiece, and the design mode is convenient for the teaching of the machine tool. In addition, the movement mechanism is split as far as possible, so that the load required to be overcome by each movement is reduced, the torque of the motor is reduced, and the cost is lower. And the B axis is not limited by other axes and can move at 0-360 degrees, so that the f number of the free curved surface which can be processed is as small as possible and even exceeds a hemisphere.

In this example, the X-axis control unit 2 includes an X-axis motor 201, an X-axis coupler 202, an X-axis screw 203, and an X-axis guide rail 204, wherein the X-axis motor 201 is mounted on the mounting plate 105 at the end of the transverse slot 101 through a screw; an output shaft of the X-axis motor 201 is connected with an X-axis screw 203 through an X-axis coupler 202; the X-axis screw 203 can be precisely controlled by the X-axis motor 201 to realize forward and reverse rotation, and the X-axis screw 203 is rotatably arranged in the rotating shaft table 104; the X-axis guide rails 204 are symmetrically arranged on two sides of the transverse groove 101. The bottom of the XB shaft connecting platform 3 is provided with a chute which is movably sleeved on the X-axis guide rail 204. The B-axis control unit 4 includes a B-axis mount 401, a B-axis screw hole 402, a B-axis motor 403, and a B-axis rotation plate 404, wherein: the B-axis mounting table 401 is detachably mounted at the top of the XB axis connecting table 3; a B-axis threaded hole 402 is formed in the bottom of the B-axis mounting table 401, the B-axis threaded hole 402 is sleeved on the X-axis screw rod 203, and the B-axis threaded hole 402 and the X-axis screw rod 203 work in a matched mode to form a screw rod structure; the B-axis motor 403 is arranged on the B-axis mounting table 401; the B-axis rotating plate 404 is arranged on a rotating shaft of the B-axis motor 403, the B-axis rotating plate 404 can rotate along with the rotating shaft, and the B-axis rotating plate 404 can be controlled to accurately swing by controlling the forward and reverse rotation of the B-axis motor 403. The spindle control unit 5 comprises a spindle mounting platform 501, a spindle motor 502 and a connector 503, wherein the spindle mounting platform 501 is detachably and vertically arranged at the tail end of the B-axis rotating plate 404; the spindle motor 502 is detachably and vertically arranged in the spindle mounting table 501; the connector 503 is arranged on the rotating shaft of the spindle motor 502 and is used for connecting polishing tools such as a polishing wheel, a polishing ball or a cutter, and the connector 503 can be a hydraulic chuck; a polishing solution channel is formed in the spindle mounting table 501.

In this example, the Z-axis control unit 6 includes a Z-axis motor 601, a Z-axis coupler 602, a Z-axis screw 603, and a Z-axis guide rail 604, in which: the Z-axis motor 601 is arranged at the bottom of the vertical slot 102; an output shaft of the Z-axis motor 601 is connected with a Z-axis screw 603 through a Z-axis coupler 602; the Z-axis guide rails 604 are symmetrically arranged on bosses on both sides inside the vertical slots 102. ZC hub connection platform 7 is L type sheet metal construction, and the bottom bilateral symmetry of ZC hub connection platform 7 is provided with Z axle slider 701, and the bottom middle part of ZC hub connection platform 7 is provided with Z axle nut 702, wherein: a Z-axis sliding block 701 is movably sleeved on a Z-axis guide rail 604; z axle nut 702 suit is on Z axle screw 603, and Z axle nut 702 and Z axle screw 603 cooperation work constitute the lead screw structure, and C axle the control unit 8 includes C axle motor 801, hydraulic chuck 802 and negative pressure gas circuit 803, wherein: the C-axis motor 801 is installed on the ZC shaft connecting table 7; the hydraulic chuck 802 is arranged on a rotating shaft of the C-axis motor 801 and is used for fixing an optical workpiece or a tool clamp; the middle part of the C-axis motor 801 is provided with a negative pressure air path 803, the tool is fixed on the C axis through a hydraulic chuck, and the workpiece is fixed on the tool through vacuum pressure.

It should be noted that the motion positioning precision of the X axis is better than 1 μm, the motion positioning precision of the Z axis is better than 1 μm, the motion precision of the C axis is better than 1arcmin, the motion precision of the B axis is better than 1arcmin, the acceleration of the X axis is higher than 0.5G, the acceleration of the Z axis is higher than 0.5G, the maximum acceleration of the C axis is 100rads/sec2, the maximum acceleration of the B axis is 100rads/sec2, the maximum motion speed of the X axis is 3000mm/min, the maximum motion speed of the Z axis is 3000mm/min, the rotation speed of the C axis is 0-3000rpm, the rotation speed of the main shaft is 0-100rpm, the machine Tool is provided with a Tool position, the Tool position represents that the X axis goes to the left limit, the Z axis goes to the motion zero point, the C axis is the motion 0 point, and the B axis is the motion 0 point; 24. the machine tool is provided with a Home position which represents that an X-axis moves to a point 0, a Z-axis moves to a point 0, a C-axis is a point 0, and a B-axis is a point 0. At the position of 0 point of the B-axis motor motion, the axis of the spindle motor is parallel to the C axis. When the X-axis motor and the B-axis motor both move at the 0 point, the axis of the C axis coincides with the axis of the main shaft.

In this embodiment, a control system of a five-axis aspheric polishing machine tool includes an upper computer, a lower computer, and a plurality of drives, wherein: the lower computer is interconnected with the upper computer on the one hand, and the lower computer is interconnected with a plurality of drivers respectively on the other hand, and the drivers are used for driving the motors to move accurately. Specifically, the lower computer can adopt an STM32 series controller, and the driver can adopt a TMC series chip for control. And the control system calculates the polishing track and the residence time through an upper computer and generates data. The data is sent to the lower computer controller, the controller automatically generates the interpolated data, and the lower computer returns a completion state signal to the upper computer after the interpolated data is generated. And after the upper computer receives the 'completion state signal', the lower computer can be controlled to start processing. And after the lower computer receives the machining signal, judging whether a completion state signal is sent to the upper computer, if so, machining, and otherwise, waiting. When the lower computer begins to process, data are converted into pwm signals and are sent to the driver, the driver returns position signals to the lower computer, and therefore processing separated from closed-loop control of the upper computer is achieved, and the driver drives each motor to move to achieve processing of the optical aspheric lens.

It should be noted that the control system of the polishing machine tool includes the following control steps: the upper computer generates shaft movement position and movement speed data and sends the movement position and movement speed data to the lower computer; the lower computer receives the shaft motion position and the motion speed data and performs data interpolation on the shaft motion position and the motion speed data, and the lower computer generates complete interpolation data and then sends a completion state signal to the upper computer; after receiving the completion state signal, the upper computer sends a processing signal to the lower computer; and after the lower computer receives the machining signal, the lower computer converts the interpolation data into PWM signals and sends the PWM signals to corresponding drivers, the drivers respectively control the motion of the motors, the lower computer collects the position information and the rotating speed signals of the motors in real time to form closed-loop control separated from the upper computer, and the closed-loop control can adopt a PID control method.

The upper computer generates multi-axis motion position and motion speed data, and sends the data to the lower computer to generate data interpolation, linear interpolation or circular interpolation of the data machine tool after interpolation, and the generated interpolation data can send a completion state signal to the upper computer. When the upper computer sends a machining signal to the lower computer, the lower computer judges whether a completion state signal is sent to the upper computer or not, if the completion state signal is sent, the upper computer sends the machining signal to the lower computer, the interpolated data are converted into PWM signals and sent to drivers of all the shafts, and the drivers respectively control all the motors to move; otherwise, waiting for the completion of the sending of the completion status signal. The drivers of the multiple movement axes can send position signals to the lower computer, so that closed-loop control of the lower computer is formed.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a five aspheric surfaces polishing machine tools, its characterized in that includes base (1), X axle the control unit (2), XB axle connection platform (3), B axle the control unit (4), main shaft the control unit (5), Z axle the control unit (6), ZC axle connection platform (7) and C axle the control unit (8), wherein:

the top of the base (1) is provided with a transverse groove (101), the side surface of the base (1) is provided with a vertical groove (102), the top of the vertical groove (102) is provided with a transmission port (103), and a rotating shaft table (104) is arranged in the transverse groove (101);

the X-axis control unit (2) is arranged in the transverse groove (101) and connected with the XB axis connecting table (3), the B-axis control unit (4) is arranged on the XB axis connecting table (3), and the X-axis control unit (2) is used for driving the XB axis connecting table (3) and the B-axis control unit (4) to move back and forth along the X-axis direction;

the spindle control unit (5) is arranged on the B-axis control unit (4), and the B-axis control unit (4) drives the spindle control unit (5) to rotate and swing around the B axis;

the Z-axis control unit (6) is arranged in the vertical groove (102) and connected with the ZC axis connecting table (7), the C-axis control unit (8) is arranged on the ZC axis connecting table (7), and the Z-axis control unit (6) is used for driving the ZC axis connecting table (7) and the C-axis control unit (8) to move up and down along the C-axis direction;

the axis of the X-axis control unit (2) is perpendicular to the axis of the C-axis control unit (8), the axis of the main shaft control unit (5) is coaxial with the axis of the C-axis control unit (8), and the axis of the Z-axis control unit (6) is parallel to the axis of the C-axis control unit (8).

2. The control system of the five-axis aspheric surface polishing machine tool according to claim 1, characterized in that the X-axis control unit (2) comprises an X-axis motor (201), an X-axis coupler (202), an X-axis screw (203), an X-axis guide rail (204), wherein:

the X-axis motor (201) is arranged on the mounting plate (105) at the tail end of the transverse groove (101);

an output shaft of the X-axis motor (201) is connected with an X-axis screw (203) through an X-axis coupler (202);

the X-axis screw (203) is rotatably arranged in the rotating shaft table (104);

the X-axis guide rails (204) are symmetrically arranged on two sides of the transverse groove (101).

3. The control system of the five-axis aspheric surface polishing machine tool as claimed in claim 1, wherein the XB shaft connecting table (3) is provided with a sliding chute at the bottom, and the sliding chute is movably sleeved on the X-axis guide rail (204).

4. The control system of the five-axis aspheric polishing machine tool as claimed in claim 1, wherein the B-axis control unit (4) comprises a B-axis mount (401), a B-axis threaded hole (402), a B-axis motor (403) and a B-axis rotation plate (404), wherein:

the B-axis mounting table (401) is detachably mounted at the top of the XB-axis connecting table (3);

a B-axis threaded hole (402) is formed in the bottom of the B-axis mounting table (401), the B-axis threaded hole (402) is sleeved on the X-axis screw (203), and the B-axis threaded hole (402) and the X-axis screw (203) work in a matched mode to form a screw rod structure;

the B-axis motor (403) is arranged on the B-axis mounting table (401);

the B-axis rotating plate (404) is arranged on a rotating shaft of the B-axis motor (403), and the B-axis rotating plate (404) can rotate along with the rotating shaft.

5. The control system of the five-axis aspherical polishing machine according to claim 1, wherein the spindle control unit (5) comprises a spindle mounting table (501), a spindle motor (502), and a connector (503), wherein:

the spindle mounting table (501) is detachably and vertically mounted at the tail end of the B-axis rotating plate (404);

the spindle motor (502) is detachably and vertically arranged in the spindle mounting table (501);

the connector (503) is arranged on a rotating shaft of the spindle motor (502) and is used for connecting a polishing wheel, a polishing ball or a cutter;

and a polishing solution channel is formed in the spindle mounting table (501).

6. The control system of the five-axis aspheric surface polishing machine tool according to claim 1, characterized in that the Z-axis control unit (6) comprises a Z-axis motor (601), a Z-axis coupler (602), a Z-axis screw (603), and a Z-axis guide rail (604), wherein:

the Z-axis motor (601) is arranged at the bottom of the vertical groove (102);

an output shaft of the Z-axis motor (601) is connected with a Z-axis screw (603) through a Z-axis coupler (602);

the Z-axis guide rails (604) are symmetrically arranged on bosses on two sides inside the vertical groove (102).

7. The control system of the five-axis aspheric polishing machine tool as claimed in claim 1, wherein the ZC shaft connecting table (7) is of an L-shaped thin plate structure, Z-axis sliding blocks (701) are symmetrically arranged on two sides of the bottom of the ZC shaft connecting table (7), and a Z-axis nut (702) is arranged in the middle of the bottom of the ZC shaft connecting table (7), wherein:

the Z-axis sliding block (701) is movably sleeved on the Z-axis guide rail (604);

the Z-axis nut (702) is sleeved on the Z-axis screw (603), and the Z-axis nut (702) and the Z-axis screw (603) work in a matched mode to form a screw rod structure.

8. The control system of the five-axis aspheric surface polishing machine tool according to claim 1, characterized in that the C-axis control unit (8) comprises a C-axis motor (801), a hydraulic chuck (802) and a negative pressure air circuit (803), wherein:

the C-axis motor (801) is installed on the ZC shaft connecting table (7);

the hydraulic chuck (802) is arranged on a rotating shaft of the C-axis motor (801) and is used for fixing an optical workpiece or a tool clamp;

and a negative pressure air path (803) is formed in the middle of the C-axis motor (801).