A double-sided polishing machine with a polishing disc device

Abstract

A double-sided polishing machine tool polishing disc device, comprising: base, polishing assembly, center rod, polishing disc mounting assembly, polishing disc, rotary drive assembly, polishing motor, rotating rod; lifting assembly, slide plate, mounting seat, characterized in that the mounting seat is provided with a gravity self-balancing device and a pressure control device connected with the polishing assembly, wherein the gravity self-balancing device has: a plurality of first sliding rods, one end fixed on the lower circular mounting plate, the other end penetrating through the moving seat and slidingly connected with the moving seat and connected with the upper circular mounting plate; the outer wall of the center rod is sleeved with a first elastic member, which is distributed between the lower circular mounting plate and the moving seat to balance the weight of the polishing assembly and the moving seat; a pressure sensor is arranged below the piston rod of the pressure cylinder and on the top of the moving seat, used for measuring the polishing pressure and outputting a pressure signal; the controller adjusts the polishing pressure according to the measured value, thereby realizing accurate measurement and control of the polishing pressure of the polishing disc.

Description

Technical Field

[0001] This invention relates to the field of optical precision machining technology, and in particular to a polishing disc device for a double-sided polishing machine. Background Technology

[0002] Double-sided polishing machines are mainly used for precision polishing of flat optical components. Their main characteristic is that, after achieving good flatness through grinding, chemical and mechanical polishing methods are used to remove minute protrusions, pits, and surface damage layers from the workpiece surface, resulting in a bright and smooth precision component surface. According to process requirements, the pressure of the upper polishing disc needs to be adjusted from zero. Existing equipment uses a separate moving device to control the up-and-down movement of the polishing disc and the surface pressure of the optical component. The polishing pressure is affected by the gravity of the upper polishing disc and the moving device itself, which limits the adjustment range of the polishing pressure and makes it impossible to achieve precise measurement and control of the polishing pressure on the optical component surface, easily leading to excessive processing pressure and uncertainty in the processing results. Therefore, it is necessary to propose a gravity-self-balancing polishing disc device for a double-sided polishing machine to at least partially solve the problems existing in the current technology. Summary of the Invention

[0003] This invention addresses the problems of existing technologies by proposing a polishing disc device for a double-sided polishing machine. During the polishing process, the controller detects the polishing pressure value in real time through a pressure regulating device and adjusts the pressure according to the measured value, thereby regulating the polishing pressure to achieve pressure balance. This device is not only simple in structure, low in cost, and easy to operate, but also enables precise measurement and control of polishing pressure.

[0004] The technical solution of this invention is: a polishing disc device for a double-sided polishing machine tool, comprising:

[0005] A base;

[0006] A polishing assembly includes a central rod, a polishing disc mounting assembly, and a polishing disc. The lower end of the longitudinally arranged central rod is connected to the polishing disc via the polishing disc mounting assembly.

[0007] A rotary drive assembly, comprising a polishing motor, a drive, and a rotating rod;

[0008] A lifting assembly includes a slide plate, each equipped with a mounting seat, which is fixed to the outer wall of the base in a vertically movable manner;

[0009] Its characteristic is that the mounting base is equipped with a gravity self-balancing device and a pressure control device that are jointly connected to the polishing assembly, wherein...

[0010] Gravity self-balancing devices have the following characteristics:

[0011] Multiple first sliding rods are horizontally distributed, with one end fixed to the lower circular mounting plate and the other end passing through the movable seat and slidingly connected to the movable seat before being connected to the upper circular mounting plate.

[0012] A movable base is located between an upper circular mounting plate and a lower circular mounting plate. The upper and lower circular mounting plates and the central rod are concentrically arranged. The movable base is fixedly connected to the upper end of the central rod. A first elastic element is sleeved on the outer wall of the central rod and distributed between the lower circular mounting plate and the movable base to balance the weight of the polishing assembly and the movable base.

[0013] The pressure control device has:

[0014] A pressure cylinder is installed at the bottom of the upper circular mounting plate. The lower end of its piston rod, which can move up and down, is in contact with the moving seat, pushing the polishing disc to move up and down and applying polishing pressure.

[0015] A pressure sensor, which can be positioned against the piston rod of the pressure cylinder and on top of the moving seat, is used to measure the polishing pressure and output a pressure signal.

[0016] A controller has its signal input terminal connected to the output terminal of a pressure sensor to receive the output pressure signal. Correspondingly, its execution signal output terminal is connected to the control valve of the pressure cylinder. The controller adjusts the polishing pressure according to the measured value, thereby achieving precise measurement and control of the polishing pressure of the polishing disc.

[0017] Furthermore, the lifting assembly also includes a ball screw, which is connected to the bottom of a lifting motor mounted on the base. The ball screw is provided with a movable female seat, which is fixed to the side wall of the slide.

[0018] Furthermore, a guide mechanism is provided between the base and the slide plate, and at least one vertically distributed linear guide rail is provided on the outer wall of the base. The slide plate is fixed on the linear guide rail and can slide up and down. The top of the base is provided with a limiting function.

[0019] Furthermore, the polishing disc mounting assembly includes a mounting disc, a ball head seat on the top of the mounting disc, a ball head fixing cover fixed on the top of the ball head seat, a ball head rod between the ball head seat and the ball head fixing cover, a pin connecting the lower section of the ball head rod to the ball head fixing cover, and a detachable connection between the upper section of the ball head rod and the bottom of the center rod.

[0020] Furthermore, the detachable connection is achieved by threaded connection or snap-fit ​​connection with polygonal holes.

[0021] Furthermore, the mounting plate has a T-shaped cross-section and a mounting positioning surface at the bottom, which matches the fixing groove on the top of the polishing plate and is fixed by bolts.

[0022] Furthermore, the rotary drive assembly includes a polishing motor, a pneumatic-electric slip ring, and a rotating rod. The mounting base includes upper and lower mounting bases. The polishing motor is located on the top of the upper mounting base. The bottom output shaft of the polishing motor is connected to the upper end of the rotating rod. The rotating rod passes through the upper mounting base via a bearing, so that the lower end of the rotating rod is connected to the center of the upper circular mounting plate in the gravity self-balancing device. A pneumatic-electric slip ring is located on the upper part of the rotating rod. The pneumatic-electric slip ring has a stator and a rotor, so that air and electricity are input from the fixed stator and output from the rotating rotor, which is used for the air supply of the pressure cylinder and the electrical signal connection of the pressure sensor.

[0023] Furthermore, the central rod is a spline rod, with a hole drilled in the lower mounting base to install the spline, so that the spline rod can be installed in the lower mounting base in a way that allows it to move up and down through the spline groove and engage with the spline.

[0024] Furthermore, a second sliding rod is provided at the bottom of the piston rod, the second sliding rod is slidably connected to the piston rod, and a second elastic element is sleeved on the outer wall of the second sliding rod.

[0025] Finally, the rotating rod, pressure cylinder, center rod, and polishing disc are arranged on the same central axis.

[0026] Compared with existing technologies, the advantages of this product are:

[0027] (1) The lifting assembly moves the polishing disc to the surface of the optical element, shortening the length of the spline rod, making the upper polishing disc device structure more stable and preventing it from vibrating when a large pressure is applied.

[0028] (2) The lifting assembly moves the polishing disc to the surface of the optical element, shortening the stroke of the piston rod of the pressure cylinder, which allows for more precise control of the polishing pressure;

[0029] (3) The gravity self-balancing device is used to achieve the self-balancing of the polishing components and the moving seat, so that the polishing pressure on the component surface is the same as the pressure applied by the cylinder, thereby achieving accurate measurement and control of the polishing pressure of the upper polishing disc, avoiding over-polishing caused by inaccurate polishing pressure measurement and excessive processing pressure.

[0030] (4) The gravity self-balancing device realizes the self-balancing of the polishing components and the moving seat, avoids the influence of the gravity of the polishing disc on the polishing pressure, can realize the control of the polishing pressure from zero, expands the adjustment range of the polishing pressure, and meets the low pressure process requirements of double-sided polishing.

[0031] (5) The polishing motor directly drives the gravity self-balancing device and the polishing components to rotate together, which simplifies the structure of the upper polishing disc device and ensures the stability of the upper polishing disc rotation during the polishing process.

[0032] (6) The ball head and ball head seat can move freely at a small angle, ensuring that the polishing disc and the lower polishing disc are always parallel during the processing, thus avoiding uncertainty in the processing process. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the present invention.

[0034] Figure 2 This is a side view of the gravity self-balancing device.

[0035] Figure 3 This is a cross-sectional view of the gravity self-balancing device.

[0036] Figure 4 This is a side view of the present invention.

[0037] Figure 5 This is a cross-sectional view of the present invention.

[0038] In the diagram, 1. Base; 2. Polishing assembly; 3. Center rod; 4. Polishing disc mounting assembly; 5. Polishing disc; 6. Lifting assembly; 7. Slide; 8. Mounting seat; 9. Gravity self-balancing device; 10. First slide bar; 11. Lower circular mounting plate; 12. Guide sleeve; 13. Moving seat; 14. Upper circular mounting plate; 15. Pressure cylinder; 16. First elastic element; 17. Piston rod; 18. Pressure sensor; 19. Rotary drive assembly; 20. Polishing motor. 1. Ball screw; 22. Lifting motor; 23. Nut seat; 24. Linear guide rail; 25. Mounting plate; 26. Ball head seat; 27. Ball head fixing cover; 28. Ball head rod; 29. ​​Pin; 30. Mounting positioning surface; 31. Fixing groove; 32. Upper mounting base; 33. Lower mounting base; 34. Pneumatic-electric integrated slip ring; 35. Stator; 36. Rotor; 37. Spline; 38. Limit block; 39. Second slide rod; 40. Second elastic element; 41. Rotating rod.

[0039] 42. Pressure control device. Detailed Implementation

[0040] The embodiments of this invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention patent based on the specific circumstances.

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] according to Figures 1 to 5A polishing disc device for a double-sided polishing machine tool includes: a base 1, a polishing assembly 2, the polishing assembly 2 including a central rod 3, a polishing disc mounting assembly 4, and a polishing disc 5, the lower end of the longitudinally arranged central rod 3 being connected to the polishing disc 5 via the polishing disc mounting assembly 4; a rotary drive assembly 19 including a polishing motor 20 driving a rotary rod 41; and a lifting assembly 6 including a slide 7, on which mounting seats 8 are respectively provided, which are fixed to the outer wall of the base 1 in a way that allows for vertical movement; the key improvement lies in the mounting seats 8 being provided with a gravity self-balancing device 9 and a pressure control device 42 that are jointly connected to the polishing assembly 2, wherein the gravity self-balancing device 9 has: four first sliding rods 10, evenly distributed horizontally around the circumference, one end fixed to the lower circular mounting plate 11, and the other end passing through a movable seat 13 and slidably connected to the movable seat 13, and then connected to the upper circular mounting plate 14. The movable seat 13 is located between the upper circular mounting plate 14 and the lower circular mounting plate 11. The upper circular mounting plate 14, the lower circular mounting plate 11, and the center rod 3 are concentrically arranged. The movable seat 13 is fixedly connected to the upper end of the center rod 3. A first elastic element 16 is sleeved on the outer wall of the center rod 3 and distributed between the lower circular mounting plate 11 and the movable seat 13 to balance the weight of the polishing assembly 2 and the movable seat 13. The pressure control device 42 has: a pressure cylinder 15 installed at the bottom of the upper circular mounting plate 14, the lower end of its piston rod 17 which can move up and down is in contact with the movable seat 13, pushing the polishing disc 5 up and down and applying polishing pressure; a second slide rod 39 is provided at the bottom of the piston rod 17, the second slide rod 39 is slidably connected to the piston rod 17, and a second elastic element 40 is sleeved on the outer wall of the second slide rod 39 to play a safety buffer role and prevent the piston rod from being overloaded. The pressure sensor 18 is disposed in contact with the piston rod 17 of the pressure cylinder 15 and on the top of the moving seat 13. It is used to measure the polishing pressure and output a pressure signal. The signal input terminal of the controller is connected to the output terminal of the pressure sensor 18 to receive the output pressure signal. Correspondingly, the execution signal output terminal is connected to the control valve of the pressure cylinder 15. The controller adjusts the polishing pressure according to the measured value, thereby realizing the accurate measurement and control of the polishing pressure of the polishing disc 5.

[0044] The lifting assembly 6 also includes a ball screw 21, which is connected to the bottom of a lifting motor 22 mounted on the base 1. The ball screw 21 has a vertically movable female seat 23, which is fixed to the side wall of the slide plate 7. The lifting assembly 6 drives the slide plate 7 to move up and down via the female seat 23. A guide mechanism is provided between the base 1 and the slide plate 7. At least one vertically distributed linear guide rail 24, preferably a pair of horizontally distributed linear guide rails 24, is provided on the outer wall of the base 1. The slide plate 7 is slidably fixed on the linear guide rails 24. To limit the sliding stroke of the slide plate 7 and the base 1, a limiting block 38 is provided at the top of the base 1, which cooperates with the top of the slide plate 7 to achieve a limiting function.

[0045] The polishing disc mounting assembly 4 includes a mounting disc 25 with a T-shaped cross-section and a mounting positioning surface 30 at the bottom, which matches the fixing groove 31 on the top of the polishing disc 5 and is fixed by bolts. A ball joint seat 26 is located on the top of the mounting disc 25, and a ball joint fixing cover 27 is fixed to the top of the ball joint seat 26. A ball joint rod 28 is located between the ball joint seat 26 and the ball joint fixing cover 27. The ball joint rod 28 and the ball joint seat 26 can move freely at a small angle, ensuring that the polishing disc 5 and the lower polishing disc remain parallel during processing and avoiding uncertainties in the processing. The lower section of the ball joint rod 28 is connected to the ball joint fixing cover 27 by a pin 29, and the upper section of the ball joint rod 28 is detachably connected to the bottom of the center rod 3. This detachable connection uses a threaded connection or a snap-fit ​​connection with polygonal holes. The center rod 3 is a splined rod, and a spline 37 is installed in the lower mounting base 33 through a hole, so that the splined rod can be installed in the lower mounting base 33 by engaging with the spline 37 through the spline groove. Finally, for smooth rotation, the rotating rod 41, pressure cylinder 15, center rod 3, and polishing disc 5 are arranged on the same central axis.

[0046] The rotary drive assembly 19 includes a polishing motor 20, a pneumatic-electric slip ring 34, and a rotating rod 41. The mounting base 8 includes an upper mounting base 32 and a lower mounting base 33. The polishing motor 20 is located on the top of the upper mounting base 32. The bottom output shaft of the polishing motor 20 is connected to the upper end of the rotating rod 41. The rotating rod 41 passes through the upper mounting base 32 through a bearing, so that the lower end of the rotating rod 41 is connected to the center of the upper circular mounting plate 14 in the gravity self-balancing device 9. The upper part of the rotating rod 41 is provided with a pneumatic-electric slip ring 34. The pneumatic-electric slip ring 34 has a stator 35 and a rotor 36, so that air and electricity are input from the fixed stator 35 and output from the rotating rotor 36 for the air supply of the pressure cylinder 15 and the electrical signal connection of the pressure sensor 18.

[0047] In actual use, after the polishing disc 5 is selected according to the process requirements, the first elastic element 16 will deform under the influence of the gravity of the polishing disc 5, causing the moving seat 13 to descend along the first slide rod 10 until the elastic force of the first elastic element 16 is balanced with the gravity of the polishing disc 5 and its moving seat 13. Then, the lifting assembly 6 moves the upper polishing disc 5 to contact the surface of the optical element. At this time, the polishing pressure on the surface of the element is zero, and the polishing pressure on the surface of the element during the processing will not be affected by the gravity of the polishing disc 5. After the polishing pressure is set, the piston rod 17 of the pressure cylinder 15 drives the second slide rod 39 to move downward and contact the pressure sensor 18, causing the second elastic element 40 to deform. At this time, the pressure sensor 18 will detect a pressure value, which is equal to the polishing pressure on the surface of the element. During the polishing process, the controller adjusts the pressure of the pressure cylinder 15 based on the pressure value detected by the pressure sensor 18 to ensure pressure balance during polishing and to match the pre-designed polishing pressure. Then, the polishing motor 20 rotates, driving the gravity self-balancing device 9 to rotate via the rotating rod 41. The gravity self-balancing device 9 drives the center rod to rotate via the moving seat 13. The ball head rod 28 is connected to the center rod 3. After passing through the ball head fixing cover 27, the ball head of the ball head rod 28 is connected to the ball head seat 26 on the mounting plate 25. The ball head rod 28 and the ball head seat 26 can move freely at a small angle, ensuring that the polishing disc 5 is always parallel to the processing surface during the processing, avoiding uncertainties in the processing process. The center rod drives the mounting plate 25 to rotate via the ball head connecting rod, and the mounting plate 25 drives the polishing disc 5 to rotate, and it remains parallel to the lower polishing disc during the rotation, thereby polishing the workpiece waiting to be processed.

Claims

1. A polishing disc device for a double-sided polishing machine tool, comprising: A base; A polishing assembly includes a central rod, a polishing disc mounting assembly, and a polishing disc. The lower end of the longitudinally arranged central rod is connected to the polishing disc via the polishing disc mounting assembly. A rotary drive assembly includes a polishing motor that drives a rotating rod; A lifting assembly includes a slide plate, each equipped with a mounting seat, which is fixed to the outer wall of the base in a vertically movable manner; Its features The mounting base is equipped with a gravity self-balancing device and a pressure control device that are connected together to the polishing assembly. Gravity self-balancing devices have the following characteristics: Multiple first sliding rods are horizontally distributed, with one end fixed to the lower circular mounting plate and the other end passing through the movable seat and slidingly connected to the movable seat before being connected to the upper circular mounting plate; A movable base is located between an upper circular mounting plate and a lower circular mounting plate. The upper and lower circular mounting plates and the central rod are concentrically arranged. The movable base is fixedly connected to the upper end of the central rod. A first elastic element is sleeved on the outer wall of the central rod and distributed between the lower circular mounting plate and the movable base to balance the weight of the polishing assembly and the movable base. The pressure control device has: A pressure cylinder is installed at the bottom of the upper circular mounting plate. The lower end of its piston rod, which can move up and down, is in contact with the moving seat, pushing the polishing disc to move up and down and applying polishing pressure. A pressure sensor, which can be positioned against the piston rod of the pressure cylinder and on top of the moving seat, is used to measure the polishing pressure and output a pressure signal. A controller has a signal input terminal connected to the output terminal of a pressure sensor to receive the output pressure signal. Correspondingly, the execution signal output terminal is connected to the control valve of the pressure cylinder. The controller adjusts the polishing pressure according to the measured value, thereby realizing the accurate measurement and control of the polishing pressure of the polishing disc. The mounting base includes upper and lower mounting bases. The center rod is a spline rod. A hole is made in the lower mounting base to install the spline, so that the spline rod can be installed in the lower mounting base by engaging with the spline through the spline groove.

2. The polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that... The lifting assembly also includes a ball screw, which is connected to the bottom of a lifting motor mounted on the base. The ball screw is provided with a movable female seat, which is fixed to the side wall of the slide.

3. The polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that... A guide mechanism is provided between the base and the slide. At least one vertically distributed linear guide rail is provided on the outer wall of the base. The slide is fixed on the linear guide rail and can slide up and down. A limiting block is provided on the top of the base, which cooperates with the top of the slide to realize the limiting function.

4. The polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that... The polishing disc mounting assembly includes a mounting disc, a ball head seat on the top of the mounting disc, a ball head fixing cover fixed on the top of the ball head seat, a ball head rod between the ball head seat and the ball head fixing cover, a pin connecting the lower section of the ball head rod to the ball head fixing cover, and a detachable connection between the upper section of the ball head rod and the bottom of the center rod.

5. A polishing disc device for a double-sided polishing machine tool according to claim 4, characterized in that... The detachable connection is achieved by either a threaded connection or a snap-fit ​​connection with polygonal holes.

6. A polishing disc device for a double-sided polishing machine tool according to claim 4, characterized in that... The mounting plate has a T-shaped cross-section and a mounting positioning surface at the bottom, which matches the fixing groove on the top of the polishing plate and is fixed by bolts.

7. A polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that... The rotary drive assembly includes a polishing motor, a pneumatic-electric integrated slip ring, and a rotating rod. The polishing motor is located on the top of the upper mounting base. The bottom output shaft of the polishing motor is connected to the upper end of the rotating rod. The rotating rod passes through the upper mounting base via a bearing, so that the lower end of the rotating rod is connected to the center of the upper circular mounting plate in the gravity self-balancing device. The upper part of the rotating rod is equipped with a pneumatic-electric integrated slip ring, which has a stator and a rotor, so that air and electricity are input from the fixed stator and output from the rotating rotor for the air and electricity supply of the pressure cylinder.

8. A polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that... The piston rod has a second sliding rod at its bottom, which is slidably connected to the piston rod. A second elastic element is sleeved on the outer wall of the second sliding rod.

9. A polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that... The rotating rod, pressure cylinder, center rod, and polishing disc are arranged on the same central axis.

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