Polishing disc device on double-sided polishing machine tool

Abstract

An upper polishing disc device of a double-face polishing machine tool comprises a base, the polishing assembly comprises a rotating rod, a polishing disc mounting assembly and a polishing disc, and the lower end of the longitudinally arranged rotating rod is connected with the polishing disc; the rotary driving assembly comprises a polishing motor, a driver and a connecting rotary rod; the lifting assembly comprises a slide carriage, and a mounting seat is arranged on the slide carriage and is fixed on the base in a manner of moving up and down; the polishing device is characterized in that a pressure adjusting device is arranged on the mounting base, one end of a first sliding rod is fixed to the mounting base, the other end of the first sliding rod penetrates through a movable base to be fixed to the bottom of the pressure cylinder mounting base, and the lower end of a piston rod is connected with a rotatable connecting structure to push the polishing disc to ascend and descend and apply polishing pressure; the moving seat is arranged between the mounting seat and the pressure cylinder mounting seat, the moving seat is in sliding connection with the first sliding rod, and the pressure sensor is arranged at the top of the rotatable connecting structure; and the controller adjusts the polishing pressure according to the measured value, so that the polishing pressure of the polishing disc is accurately measured and controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of optical precision machining, and particularly to a polishing disc device on a double-sided polishing machine tool. Background Art

[0002] The double-sided polishing machine tool is mainly used for precision polishing of the surface of flat optical elements. Its main feature is that on the basis of obtaining good flatness of the optical element through grinding, the tiny protrusions, pits and surface damaged layers on the surface of the workpiece are removed by chemical and mechanical polishing methods to obtain a bright and flat precision element surface. According to the process requirements, it is necessary to adjust the pressure on the upper polishing disc from zero. The existing equipment realizes the up and down movement of the polishing disc and the control of the pressure on the surface of the optical element through a separate lifting component. The polishing pressure is affected by the gravity of the upper polishing disc itself, which limits the adjustment range of the polishing pressure, and it is impossible to accurately measure and control the polishing pressure on the surface of the optical element, and it is easy to have excessive processing pressure and uncertainty of processing results. Therefore, it is necessary to propose a polishing disc device on a double-sided polishing machine tool to at least partially solve the problems existing in the prior art. Summary of the Invention

[0003] The present invention mainly aims at the problems of the prior art and proposes a polishing disc device on a double-sided polishing machine tool, which adjusts the polishing pressure according to the process requirements, realizes the accurate measurement and control of the polishing pressure during the polishing process, avoids over-polishing caused by inaccurate polishing pressure measurement and excessive processing pressure, has low cost, is easy to operate and has accurate polishing pressure measurement.

[0004] The technical solution of the present invention is: A polishing disc device on a double-sided polishing machine tool, comprising:

[0005] A base;

[0006] A polishing component, including a rotating rod, a polishing disc mounting component and a polishing disc. The lower end of the longitudinally arranged rotating rod is connected with a polishing disc through the polishing disc mounting component;

[0007] A rotation driving component, including a polishing motor, which drives and connects the rotating rod;

[0008] A lifting component, including a sliding plate, on which a mounting seat is provided, and is movably fixed on the outer wall of the base up and down;

[0009] It is characterized in that a pressure regulating device is provided on the mounting seat, and the pressure regulating device has:

[0010] A plurality of first sliding rods, which are horizontally distributed. The lower ends of the first sliding rods are fixed on the mounting seat, and the upper ends are fixed with a pressure cylinder mounting seat;

[0011] A moving seat is arranged between the mounting seat and the pressure cylinder mounting seat. The moving seat is slidably connected to the first sliding rod and rotatably connected to one end of the rotating rod. A first elastic member is sleeved on the outer wall of the first sliding rod and is distributed between the moving seat and the fixed seat to balance the weights of the polishing assembly and the moving seat.

[0012] A pressure cylinder is installed on the pressure cylinder mounting seat. The lower end of the piston rod that can move up and down thereof abuts and cooperates with the rotatable connection structure on the moving seat, pushing the polishing disc up and down and applying polishing pressure.

[0013] A pressure sensor is disposed in a manner that can abut below the piston rod of the pressure cylinder and on the top of the rotatable connection structure for measuring the polishing pressure and outputting a pressure signal.

[0014] A controller has its signal input end connected to the output end of the pressure sensor to receive the output pressure signal. Correspondingly, its signal output end is connected to the valve of the pressure cylinder on the cross slide. 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.

[0015] For further improvement, the lifting device includes a ball screw. The ball screw is connected to the bottom of the lifting motor. A nut seat that can move up and down is provided on the outer wall of the ball screw. The nut seat is fixed on the side wall of the cross slide, and a bearing is provided at the center of the nut seat for the ball screw to pass through.

[0016] For further improvement, a guiding mechanism is provided between the base and the cross slide. At least a pair of vertically distributed linear guide rails are provided on the outer wall of the base. The cross slide is slidably fixed on the linear guide rails. A limiting block is provided on the top of the base to cooperate with the top of the cross slide to achieve the limiting function.

[0017] For further improvement, the polishing disc mounting assembly includes a mounting disc. A ball head seat is provided on the top of the mounting disc. A ball head fixing cover is fixed on the top of the ball head seat. A ball head rod is provided between the ball head seat and the ball head fixing cover. The lower section of the rod of the ball head rod is connected to the ball head fixing cover by a pin, and the upper section of the rod of the ball head rod is detachably connected to the bottom of the rotating rod.

[0018] For further improvement, the detachable connection adopts threaded connection or snap connection with a polygonal hole.

[0019] For further improvement, for the mounting disc, the cross section of the mounting disc is T-shaped, and a mounting positioning surface is provided at the bottom, which is matched with the fixing groove on the top of the polishing disc and is fixed by bolts.

[0020] For further improvement, the rotation driving assembly includes a synchronous pulley and a synchronous belt. The polishing motor drives the synchronous pulley through the synchronous belt to rotate together with the rotating rod.

[0021] For further improvement, the rotation drive assembly is arranged on the mounting base. The middle part of the mounting base has an opening for installing a spline. The rotating rod is a spline rod, and the spline rod is connected to the spline through a spline groove. The slave synchronous pulley is arranged on the spline, and the slave synchronous pulley is concentric with the spline rod. The polishing motor is arranged on the mounting base, and the polishing motor is electrically connected to the controller. The output end of the polishing motor is equipped with a main synchronous pulley, which is rotationally connected to the slave synchronous pulley through a synchronous belt.

[0022] For further improvement, each of the four corners of the mounting base is provided with a first sliding rod. The bottom surface of the moving seat has a guide sleeve. A first elastic member is sleeved on the outer wall of each first sliding rod, and is supported between the guide sleeve and the fixed seat, so as to balance the weights of the polishing assembly and the moving seat.

[0023] Finally: A second sliding rod is provided at the bottom of the rotating rod. The second sliding rod is slidably connected to the rotating rod, and a second elastic member is sleeved on the outer wall of the second sliding rod.

[0024] Compared with the prior art, the advantages of this product are as follows:

[0025] (1) The lifting assembly drives the polishing disc to move to the surface of the optical element, shortening the length of the spline rod, making the structure of the upper polishing disc device more stable and not vibrating when applying a large pressure;

[0026] (2) The lifting assembly drives the polishing disc to move to the surface of the optical element, shortening the movement stroke of the piston rod of the pressure cylinder, and enabling more precise control of the polishing pressure;

[0027] (3) Using the first elastic member to balance the weights of the polishing assembly and the moving seat makes the polishing pressure on the surface of the element the same as the pressure applied by the pressure cylinder. At the same time, the polishing pressure can be adjusted starting from zero, realizing precise measurement and control of the polishing pressure on the upper polishing disc, and avoiding over-polishing caused by inaccurate measurement of the polishing pressure and excessive processing pressure;

[0028] (4) The ball head connecting rod and the 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, and avoiding the uncertainty during the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of the present invention,

[0030] Figure 2 is a front view of the present invention,

[0031] Figure 3 is a side sectional view of the present invention,

[0032] Figure 4 is a side view of the present invention,

[0033] Figure 5 Front cross-sectional view of the present invention

[0034] In the figure, 1 is the base, 2 is the polishing assembly, 3 is the rotating rod, 4 is the polishing disc mounting assembly, 5 is the polishing disc, 6 is the rotating drive assembly, 7 is the polishing motor, 8 is the pressure cylinder mounting seat, 9 is the rotatable connection structure, 10 is the pressure regulating device, 11 is the cross slide, 12 is the mounting seat, 13 is the lifting device, 14 is the pressure cylinder, 15 is the moving seat, 16 is the first slide bar, 17 is the pressure sensor, 18 is the piston rod, 19 is the ball screw, 20 is the lifting motor, 21 is the female screw seat, 22 is the linear guide rail, 23 is the limit block, 24 is the mounting disc, 25 is the ball head seat, 26 is the ball head fixing cover, 27 is the ball head rod, 28 is the pin, 29 is the mounting positioning surface, 30 is the fixing groove, 31 is the first elastic member, 32 is the second slide bar, 33 is the second elastic member, 34 is the driven synchronous pulley, 35 is the synchronous belt

[0035] 36 is the spline, 37 is the spline rod, 38 is the main synchronous pulley, 39 is the bearing, 40 is the protective end cover Specific embodiments

[0036] The following further describes in detail the embodiments of the present invention in combination with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention. In the description of the present invention, unless otherwise specified, "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 drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance

[0037] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations

[0038] The present invention will be further described in detail below in combination with the embodiments of the drawings

[0039] According to Figures 1 to 5, a polishing disc device on a double-sided polishing machine, comprising: a base 1; a polishing assembly 2 including a rotating rod 3, a polishing disc mounting assembly 4 and a polishing disc 5, the lower end of the longitudinally arranged rotating rod 3 is connected with a polishing disc 5 through the polishing disc mounting assembly 4; a rotation driving assembly 6 including a polishing motor 7 for driving and connecting the rotating rod 3; a lifting assembly 13 including a sliding plate 11, on which there is a mounting seat 12, and the sliding plate 11 is movably fixed on the outer wall of the base 1; the improvement focuses on that a pressure regulating device 10 is provided on the mounting seat 12, and the pressure regulating device 10 has: a sliding rod, one end of the first sliding rod 16 is fixed on the mounting seat 12, and the other end passes through the moving seat 15 and is fixed at the bottom of the pressure cylinder mounting seat 12. A first elastic member 31 is sleeved on the outer wall of the first sliding rod 16 to balance the weights of the polishing disc assembly and the moving seat; the lower end of the piston rod 18 of the pressure cylinder 14 that can move up and down abuts against the rotatable connection structure 9 to push the polishing disc 5 to move up and down and apply polishing pressure; the moving seat 15 is arranged between the mounting seat 12 and the pressure cylinder mounting seat 8, the moving seat 15 is slidably connected with the first sliding rod 16, and one end of the moving seat 15 and the rotating rod 3 are rotationally connected through the rotatable connection structure 9; a pressure sensor 17 is arranged in a position where it can abut against the lower part of the piston rod 18 of the pressure cylinder 14, at the top of the rotatable connection structure 9, for measuring the polishing pressure and outputting a pressure signal; the signal input end of the controller is connected to the output end of the pressure sensor 17 to receive the output pressure signal. Correspondingly, the signal output end of the controller is connected to the electric control valve of the pressure cylinder 14 on the sliding plate 11. The controller adjusts the polishing pressure according to the measured value, so as to realize the accurate measurement and control of the polishing pressure of the polishing disc 5.

[0040] Specifically, the lifting component 13 further includes a ball screw 19, which is connected to the bottom of the lifting motor 20. A nut seat 21 that can move up and down is provided on the outer wall of the ball screw 19. The nut seat 21 is fixed to the side wall of the cross slide 11, and a bearing is provided at the center of the nut seat 21 for the ball screw 19 to pass through. The lifting motor 20 drives the cross slide 11 to move up and down on the outer wall of the base 1 through the ball screw 19 and the nut seat 21. A guiding mechanism is provided between the base 1 and the cross slide 11. At least a pair of linear guide rails 22 distributed vertically are provided on the outer wall of the base 1, and the cross slide 11 is slidably fixed on the linear guide rails 22. A limit block 23 is provided at the top of the base 1, which cooperates with the top of the cross slide 11 to achieve the limit function and prevent the cross slide 11 from driving the polishing disc mounting assembly 4 to accidentally move outside the working stroke. The polishing disc mounting assembly 4 includes a mounting disc 24. A ball head seat 25 is provided at the top of the mounting disc 24, and a ball head fixing cover 26 is fixed to the top of the ball head seat 25. There is a ball head rod 27 between the ball head seat 25 and the ball head fixing cover 26. The lower section of the rod of the ball head rod 27 is connected to the ball head fixing cover 26 by a pin 28, and the upper section of the rod of the ball head rod 27 is detachably connected to the bottom of the rotating rod 3. This detachable connection can be a threaded connection between the upper section of the rod of the ball head rod 27 and the bottom of the rotating rod 3 or a snap connection with a polygonal hole. The cross section of the mounting disc 24 is T-shaped, and a mounting positioning surface 29 is provided at the bottom of the mounting disc 24, which matches the fixing groove 30 at the top of the polishing disc 5 and is fixed by bolts.

[0041] Four first slide rods 16 are distributed at the four ends of the mounting seat 12. The first slide rods 16 pass through the guide sleeves and the moving seat 15 and are fixedly connected to the pressure cylinder mounting seat 8. A first elastic member 31 is sleeved on the outer wall of the first slide rods 16, which is supported between the guide sleeve on the moving seat 15 and the mounting seat 12 to achieve the elastic reset function and bear the weight of the polishing assembly and the moving seat. The rotation drive assembly 6 includes a synchronous pulley 34 and a synchronous belt 35. The polishing motor 7 drives the synchronous pulley 34 to rotate together with the rotating rod 3 through the synchronous belt 35. The polishing motor 7 and the rotating rod 3 rotate clockwise or counterclockwise simultaneously through the driving synchronous pulley 34. The rotation drive assembly 6 is arranged on the mounting seat 12. An opening for installing a spline 36 is provided in the middle part of the mounting seat 12. The rotating rod 3 is a spline rod 37, and the spline rod 37 is connected to the spline 36 through a spline groove. The driven synchronous pulley 34 is arranged on the spline 36, and the driven synchronous pulley 34 is concentric with the spline rod 37. The polishing motor 7 is arranged on the mounting seat 12. The polishing motor 7 is electrically connected to the controller. The output end of the polishing motor 7 is installed with a main synchronous pulley 38, which is rotationally connected to the driven synchronous pulley 34 through the synchronous belt 35. The rotatable connection structure 9 has an opening in the middle of the moving seat 15, and a bearing seat and its bearing 39 are installed, so that the upper end of the rotating rod 3 is fixed in the bearing 39 and fixed with an axially limiting bolt. A protective end cover 40 is provided above, and the pressure sensor 17 is arranged on the protective end cover 40.

[0042] At the top of the piston rod 18 that can move up and down in the pressure cylinder 14, there is a second slide rod 32. The second slide rod 32 is slidably connected to the piston rod 18. A second elastic member 33 is sleeved on the outer wall of the second slide rod 32, and is supported between the end of the second slide rod 32 and the end face of the piston rod 18, so as to achieve a safety protection effect and prevent the piston rod 18 of the pressure cylinder 14 from overloading on the pressure sensor 17.

[0043] After starting the lifting motor 20, the ball screw 19 drives the sliding plate 11 and the polishing disc mounting assembly 4 on the sliding plate 11 to move up and down along the linear guide 22 on the base 1 through the female seat 21. During the movement, the limit block 23 is used to prevent the upper polishing disc 5 from accidentally moving outside the working stroke. When the upper polishing disc 5 contacts the surface of the component and sets an appropriate polishing pressure through the pressure regulating device 10, start the polishing motor 7. The polishing motor 7 drives the synchronous pulley 34 and the spline 36 thereon to rotate through the synchronous belt 35. The spline 36 drives the polishing disc 5 to rotate together through the spline rod 37 and the mounting disc 24 thereon, so as to realize the polishing of the optical component. The lifting assembly 13 drives the polishing disc 5 to move until it contacts the surface of the optical component. The first elastic member 31 in the pressure regulating device 10 is compressed, and its elastic force is basically balanced with the gravity of the polishing assembly and the moving seat. The thrust of the pressure cylinder 14 is the polishing pressure received by the surface of the component. According to the process requirements, set the polishing pressure on the surface of the component, measure the pressure received by the surface of the component through the pressure sensor 17, and feedback it to the controller to realize the control of the polishing pressure. In this way, the pressure regulation starting from zero on the surface of the component can be realized, meeting the requirements of the polishing process. At the same time, the accurate control and measurement of the polishing pressure can be realized, and over-polishing caused by excessive pressure can be avoided.

[0044] Working principle and advantages of the above technical solution: During actual use, when the polishing disc 5 is selected according to the process requirements, the first elastic member 31 will deform due to the gravity of the polishing disc 5, driving the moving seat 15 to descend along the first sliding rod 16 until the elastic force of the first elastic member 31 is basically balanced with the gravity of the polishing assembly and the moving seat. Then, the lifting assembly 13 drives the upper polishing disc 5 to move into contact with the surface of the optical element. After setting the polishing pressure, the piston rod 18 of the pressure cylinder 14 drives the second sliding rod 32 to move downward and contact the pressure sensor 17, causing the second elastic member 33 to deform. At this time, the pressure sensor 17 will detect a pressure value, which is equal to the polishing pressure received by the surface of the element. During the polishing process, the controller adjusts the pressure of the pressure cylinder 14 according to the pressure value detected by the pressure sensor 17 to ensure pressure balance during the polishing process. The ball head rod 27 is connected to the spline rod 37. The ball head of the ball head rod 27 is connected to the ball head seat 25 on the mounting disc 24 after passing through the ball head fixing cover 26. The ball head rod 27 and the ball head seat 25 can move freely at a small angle, ensuring that the polishing disc 5 is always parallel to the processing surface during the processing process and avoiding the uncertainty during the processing process. The ball head rod 27 is installed in the pin hole of the ball head rod 27 and passes through the through holes of the ball head fixing cover 26 at both ends. In this way, the spline rod 37 drives the mounting disc 24 to rotate through the ball head connecting rod, and the mounting disc 24 drives the polishing disc 5 to rotate, and it is always parallel to the lower polishing disc 5 during the rotation process.

Claims

1. A polishing disc device for a double-sided polishing machine tool, comprising: a base; A polishing assembly, comprising a rotating rod, a polishing disc mounting assembly and a polishing disc, wherein the lower end of the longitudinally arranged rotating rod is connected to the polishing disc through the polishing disc mounting assembly; A rotary drive assembly, including a polishing motor, driving and connecting the rotary rod; A lifting assembly includes a slide plate, on which a mounting seat is provided, which can be fixed on the outer wall of the base so as to be movable up and down; The mounting seat is provided with a pressure regulating device, which has: A plurality of first slide bars are horizontally distributed, the lower ends of the first slide bars are fixed on the mounting seat, and the upper ends of the first slide bars are fixed with the pressure cylinder mounting seat; A movable seat is arranged between the mounting seat and the pressure cylinder mounting seat, the movable seat is slidably connected to the first sliding rod, and the movable seat is rotatably connected to one end of the rotating rod; a first elastic member is sleeved on the outer wall of the first sliding rod, and is distributed between the movable seat and the fixed seat to balance the weight of the polishing assembly and the movable seat; A pressure cylinder is mounted on the pressure cylinder mounting seat, and the lower end of the piston rod that can move up and down is in contact with the rotatable connection structure on the movable seat to push the polishing disc up and down and apply polishing pressure; A pressure sensor is disposed under the piston rod of the pressure cylinder and on the top of the rotatable connection structure, and is used to measure the polishing pressure and output a pressure signal; A controller, whose signal input end is connected to the output end of the pressure sensor, receives the output pressure signal, and correspondingly, the execution signal output end is connected to the valve of the pressure cylinder on the slide. The controller adjusts the polishing pressure according to the measured value, thereby realizing accurate measurement and control of the polishing pressure of the polishing disk.

2. A polishing disc device for a double-sided polishing machine according to claim 1, characterized in that The lifting assembly also includes a ball screw, which is connected to the bottom of the lifting motor. A driver seat that can move up and down is provided on the outer wall of the ball screw. The driver seat is fixed on the side wall of the slide, and a bearing is provided in the center of the driver seat for the ball screw to pass through.

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

4. A polishing disc device for a double-sided polishing machine according to claim 1, characterized in that The polishing disc mounting assembly includes a mounting disc, a ball head seat is provided on the top of the mounting disc, a ball head fixing cover is fixed on the top of the ball head seat, a ball head rod is provided between the ball head seat and the ball head fixing cover, the lower section of the rod of the ball head rod and the ball head fixing cover are connected by a pin, and the upper section of the rod of the ball head rod is detachably connected to the bottom of the rotating rod.

5. A polishing disc device for a double-sided polishing machine according to claim 4, characterized in that The detachable connection is a threaded connection or a polygonal hole snap-on connection.

6. A polishing disc device for a double-sided polishing machine according to claim 5, characterized in that The installation plate has a T-shaped cross section, and a mounting positioning surface is provided at the bottom, which matches the fixing groove at the top of the polishing plate and is fixed by bolts.

7. The polishing disc device for a double-sided polishing machine according to claim 1, characterized in that The rotary drive assembly comprises a synchronous pulley and a synchronous belt. The polishing motor drives the synchronous pulley through the synchronous belt to achieve common rotation with the rotating rod.

8. The polishing disc device for a double-sided polishing machine tool according to claim 7, characterized in that The rotary drive assembly is arranged on a mounting seat, and an opening is provided in the middle part of the mounting seat for mounting a spline. The rotating rod adopts a spline rod, and the spline rod is connected to the spline through a spline groove. The slave synchronous pulley is arranged on the spline, and the slave synchronous pulley is arranged concentrically with the spline rod. The polishing motor is arranged on the mounting seat, and the polishing motor is electrically connected to the controller. A main synchronous pulley is installed at the output end of the polishing motor, and is rotationally connected to the slave synchronous pulley through a synchronous belt.

9. A polishing disc device for a double-sided polishing machine according to claim 8, characterized in that The four corners of the mounting seat are each provided with a first slide bar, the bottom surface of the movable seat has a guide sleeve, and the outer wall of each first slide bar is sleeved with a first elastic member, which is supported between the guide sleeve and the fixed seat, thereby balancing the weight of the polishing assembly and the movable seat.

10. The polishing disc device for a double-sided polishing machine tool according to claim 1, characterized in that A second sliding rod is provided at the bottom of the rotating rod. The second sliding rod is slidably connected to the rotating rod, and a second elastic member is sleeved on the outer wall of the second sliding rod.

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