High-stability and high-precision pressure control polishing device

Abstract

The utility model belongs to the technical field of polishing devices, and particularly relates to a high-stability high-precision pressure control polishing device which comprises a back plate, a servo motor, a voice coil motor and a polishing head, the top of the back plate is fixedly connected with a top plate, the bottom of the back plate is fixedly connected with a fixed connecting plate, and the top plate and the fixed connecting plate are fixedly connected through a bottom plate. One side of the back plate is fixedly connected with a mechanical arm interface flange; the output end of the voice coil motor is rotationally connected with a spindle. The rotating shaft of the servo motor is not directly connected with the main shaft, and the main shaft is telescopically pressed down through the spline bearing, so that on one hand, the main shaft moves up and down through the spline shaft without the weight of the motor, the down pressure change caused by self-generated inertia configuration and self-weight component of the polishing head can be effectively improved, the influence on torque control is reduced, and the polishing precision is improved; and on the other hand, the rotating speed is controlled through synchronous belt transmission and limited in the spline bearing, the direct influence of vibration generated when the motor rotates on the polishing head is effectively improved, and the polishing effect is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to polishing device technical field especially relates to a kind of high stability high-precision pressure control's polishing device. BACKGROUND

[0002] The polishing machine is also called grinding machine, and is often used for mechanical grinding, polishing and waxing. Its working principle is: the motor drives the sponge or wool polishing disc installed on the polishing machine to rotate at high speed. Due to the joint action of the polishing disc and the polishing agent and the friction with the surface to be polished, the purpose of removing paint surface pollution, oxidation layer and shallow marks can be achieved.

[0003] The existing patent "CN202210959215.0" proposes a high-efficiency polishing device, which includes a mounting top plate, a linear guide rail, a shaft mounting seat, a servo motor, a coupling, a bearing seat, a rotating shaft, a spherical polishing head and a double-acting low-friction cylinder. The mounting top plate is installed on the flange end of a six-degree-of-freedom robot. The linear guide rail is installed on the lower end of the mounting top plate. The shaft mounting seat is installed on the slider of the linear guide rail. The bearing seat is installed on the shaft mounting seat. The servo motor is installed on the bearing seat. The servo motor is connected to the rotating shaft through the coupling. The spherical polishing head is installed on the lower end of the rotating shaft.

[0004] However, the above-mentioned patent uses a mechanical arm to control the optical polishing device of the spherical polishing head. Due to the low feedback accuracy of the motor and the unstable feedback control effect of the motor, the polishing effect is not good, there is still a large uncertain surface medium frequency error, and additional polishing is required to meet the optical requirements, resulting in low production efficiency. Moreover, the pressing force of the polishing head cannot be effectively controlled, and the removal amount cannot be stably controlled for optical parts with different surface error sizes, making the polishing efficiency extremely unstable. UTILITY MODEL CONTENTS

[0005] 1. Technical problem to be solved

[0006] The utility model aims to solve the problem of unstable polishing effect and efficiency of the existing polishing device, and proposes a high-stability high-precision pressure control polishing device.

[0007] 2. Technical scheme

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0009] A high-stability high-precision pressure control polishing device, comprising a back plate, a servo motor, a voice coil motor and a polishing head, the top of the back plate is fixedly connected with a top plate, the bottom of the back plate is fixedly connected with a fixed connection plate, the top plate and the fixed connection plate are fixedly connected through a bottom plate, one side of the back plate is fixedly connected with a mechanical arm interface flange;

[0010] The output end of the voice coil motor is rotationally connected with a main shaft, one end of the main shaft away from the voice coil motor is fixedly connected with a polishing head connecting rod, the bottom of the polishing head connecting rod is connected with a polishing head, and the outside of the main shaft is rotationally sleeved with a spline angular support;

[0011] The top of the bottom plate is rotationally connected with a pulley, one side of the bottom plate close to the back plate is slidingly connected with a counterweight, one side of the servo motor is provided with a sliding block, the sliding block is fixedly connected with the spline angular support, one side of the sliding block is slidingly connected with the bottom plate, a steel cable is wound on the pulley, and two ends of the steel cable are fixedly connected with the spline angular support and the counterweight respectively, a spline bearing is fixedly sleeved on the main shaft, the bottom of the sliding block is fixedly connected with a spline fixed plate corresponding to the spline bearing, a synchronous wheel is fixedly sleeved on the main shaft, and the output end of the servo motor is in transmission connection with the synchronous wheel through a synchronous belt.

[0012] Preferably, one end of the mechanical arm interface flange away from the back plate is fixedly connected with a six-dimensional force sensor.

[0013] Preferably, the polishing connecting rod and the polishing head are fixedly connected through a polishing head seat.

[0014] Preferably, a linear guide rail corresponding to the sliding block is fixedly connected on the bottom plate.

[0015] Preferably, a grating ruler is fixedly connected on one side of the spline angular support, and a reading head corresponding to the grating ruler is fixedly connected on one side of the spline angular support.

[0016] Preferably, a sliding opening corresponding to the main shaft is arranged on the fixed connection plate.

[0017] Preferably, the two ends of the steel cable are fixedly connected with the spline angular support and the counterweight respectively through fastening bolts.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] (1) In the utility model, the servo motor rotating shaft is not directly connected with the main shaft, the main shaft realizes telescopic down pressure through the spline bearing, on one hand, when the main shaft moves up and down through the spline shaft, the weight of the motor is not attached, the down pressure change caused by the self-generated inertia configuration and the self-weight component of the polishing head can be effectively improved, the influence on the torque control is reduced, and the polishing precision is improved; on the other hand, the speed control is transmitted through the synchronous belt and is limited in the spline bearing, the direct influence of the vibration of the motor rotation on the polishing head is effectively improved, and the polishing effect is stable.

[0021] (2) The utility model discloses a counterweight is hoisted through the pulley, effectively improves the main shaft dead weight and inertia, further reduces the influence to the moment control, improves the polishing accuracy. Simultaneously because of above structure makes the polishing head when not outputting the moment can be easily manually up and down slide, can be manually lifted when using the positioning sharp head to carry out workpiece positioning, greatly reduces the workpiece damage risk.

[0022] (3) The utility model discloses a six-dimensional force sensor is installed between the polishing device and the mechanical arm, realizes secondary closed loop, monitors the whole polishing processing state. The mechanical arm interface flange side installs, increases the reachable range of mechanical arm, realizes the polishing processing of larger caliber workpiece. The polishing head is fixed on the main shaft through the polishing head base and the polishing head connecting rod, guarantees that the polishing head does not loosen up and improves the convenience of replacing the polishing head. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a high stability high-precision pressure control's polishing device's front view structural schematic diagram that the utility model proposes;

[0024] Fig. 2 It is a high stability high-precision pressure control's polishing device's side view structural schematic diagram that the utility model proposes.

[0025] In the drawing: 1 - voice coil motor;2 - servo motor;3 - pulley;4 - key angle bracket;5 - sliding block;6 - reading head;7 - key bearing;8 - synchronous belt;9 - grating ruler;10 - synchronous wheel;11 - main shaft;12 - polishing head connecting rod;13 - polishing head base;14 - polishing head;15 - mechanical arm interface flange;16 - six-dimensional force sensor;17 - counterweight;18 - linear guide rail;19 - back plate;20 - bottom plate;21 - fixed connection plate;22 - key fixed plate;23 - steel cable;24 - top plate. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0027] Embodiment 1:

[0028] Reference Figs. 1-2The utility model discloses a polishing device of high stability high precision pressure control, including backplate 19, servo motor 2, voice coil motor 1 and polishing head 14, the top fixed connection of backplate 19 has top plate 24, the bottom fixed connection of backplate 19 has fixed connection plate 21, and the fixed connection between top plate 24 and fixed connection plate 21 is through bottom plate 20, and one side of backplate 19 is fixedly connected with mechanical arm interface flange 15, and the reachable range of mechanical arm is increased, and the polishing processing of larger caliber workpiece is realized, and the end fixedly connected with six dimension force sensor 16 of mechanical arm interface flange 15 is away from backplate 19, realizes secondary closed loop, and monitors the polishing processing state of whole body,

[0029] In the utility model, the output end of voice coil motor 1 is rotatably connected with main shaft 11, is used for driving polishing head 14 to rotate, fixed connection plate 21 is equipped with the sliding mouth corresponding with main shaft 11, the end fixedly connected with polishing head connecting rod 12 of main shaft 11 is away from voice coil motor 1, is used for connecting polishing head 14, the bottom of polishing head connecting rod 12 is connected with polishing head 14, and polishing connecting rod 12 and polishing head 14 are fixedly connected through polishing head seat 13, conveniently install and dismount polishing head 14,

[0030] In the utility model, the outside of main shaft 11 rotatably sleeves key angle frame 4, is used for supporting spline shaft, one side of key angle frame 4 is fixedly connected with grating ruler 9, one side of key angle frame 4 is fixedly connected with the reading head 6 corresponding with grating ruler 9, and grating ruler 9 and reading head 6 constitute high-precision grating encoder feedback main shaft 11 whole position information, make voice coil motor 1 coil winding keep in ideal output interval, guarantee the relationship of current and torque,

[0031] In the utility model, the top of bottom plate 20 rotatably connects with pulley 3, one side of bottom plate 20 close to backplate 19 is slidably connected with counterweight 17, one side of servo motor 2 is equipped with sliding block 5, and sliding block 5 is fixedly connected with key angle frame 4, and one side of sliding block 5 is slidably connected with bottom plate 20, and bottom plate 20 is fixedly connected with the linear guide 18 corresponding with sliding block 5,

[0032] In the utility model, steel cable 23 is wound on pulley 3, and the two ends of steel cable 23 are fixedly connected with key angle frame 4 and counterweight 17 respectively, and the two ends of steel cable 23 are fixedly connected with key angle frame 4 and counterweight 17 through fastening bolt respectively,

[0033] In the utility model, spline bearing 7 is fixedly sleeved on main shaft 11, the bottom of sliding block 5 is fixedly connected with spline fixed plate 22 corresponding with spline bearing 7, is used for supporting spline bearing 7, synchronous pulley 10 is fixedly sleeved on main shaft 11, and the output end of servo motor 2 is drivingly connected with synchronous pulley 10 through synchronous belt 8, is used for driving main shaft 11 to rotate.

[0034] In the utility model, the servo motor 2 controls the rotating speed to drive the main shaft 11 and the polishing head 14 to rotate through the synchronous belt 8; the voice coil motor 1 outputs constant torque above the main shaft 11 through constant current to exert constant downward pressure on the polishing head 14; the high-precision grating encoder formed by the grating ruler 9 and the reading head 6 feeds back the overall position information of the main shaft 11, so that the voice coil motor 1 coil winding is kept in the ideal output interval, and the relationship between current and torque is guaranteed; the counterweight 17 balances the self-weight and inertia of the voice coil motor 1 and the main shaft 11 through the pulley 3 and the guide rail 18, so that the output torque of the polishing head 14 is controllable; the six-dimensional force sensor 16 is located between the mechanical arm and the polishing device, and monitors the torque output of the overall polishing device.

[0035] In the utility model, the servo motor 2 rotating shaft is not directly connected with the main shaft 11, and the main shaft 11 is realized telescopic down pressure through the spline shaft 7 bearing, on the one hand, the main shaft 11 moves up and down through the spline shaft without the weight of the motor, which can effectively improve the polishing head self-inertia configuration and the weight component caused by the change of the downward pressure, reduce the influence on torque control, and improve the polishing precision; on the other hand, the rotating speed control is driven through the synchronous belt 8 and limited in the spline bearing 7, which effectively improves the direct influence of the vibration of the motor rotation on the polishing head 14, and makes the polishing effect stable.

[0036] In the utility model, the counterweight 17 is hoisted through the pulley 3, which effectively improves the self-weight and inertia of the main shaft 11, further reduces the influence on torque control, and improves the polishing precision; at the same time, the above structure makes the polishing head 14 easily slide up and down manually when not outputting torque, and the workpiece positioning can be manually lifted when using the positioning sharp head, which greatly reduces the risk of workpiece damage.

[0037] In the utility model, the six-dimensional force sensor is installed between the polishing device and the mechanical arm, realizes secondary closed loop, monitors the overall polishing processing state; the mechanical arm interface flange 15 is installed on the side, increases the reachable range of the mechanical arm, realizes the polishing processing of larger caliber workpiece, and the polishing head 14 is fixed on the main shaft 11 through the polishing head seat 13 and the polishing head connecting rod 12, which guarantees that the polishing head 14 is not loose and improves the convenience of replacing the polishing head 14.

[0038] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A polishing device with high stability and high precision pressure control, comprising a back plate (19), a servo motor (2), a voice coil motor (1) and a polishing head (14), characterized in that, The top of the back plate (19) is fixedly connected with a top plate (24), the bottom of the back plate (19) is fixedly connected with a fixed connection plate (21), the top plate (24) and the fixed connection plate (21) are fixedly connected through a bottom plate (20), one side of the back plate (19) is fixedly connected with a mechanical arm interface flange (15); The output end of the voice coil motor (1) is rotatably connected with a main shaft (11), one end of the main shaft (11) away from the voice coil motor (1) is fixedly connected with a polishing head connecting rod (12), the bottom of the polishing head connecting rod (12) is connected with a polishing head (14), the outside of the main shaft (11) is rotatably sleeved with a spline angular support (4); The top of the bottom plate (20) is rotatably connected with a pulley (3), one side of the bottom plate (20) close to the back plate (19) is slidably connected with a counterweight (17), one side of the servo motor (2) is provided with a sliding block (5), the sliding block (5) is fixedly connected with the spline angular support (4), one side of the sliding block (5) is slidably connected with the bottom plate (20), the pulley (3) is wound with a steel cable (23), the two ends of the steel cable (23) are fixedly connected with the spline angular support (4) and the counterweight (17) respectively, the main shaft (11) is fixedly sleeved with a spline bearing (7), the bottom of the sliding block (5) is fixedly connected with a spline fixed plate (22) corresponding to the spline bearing (7), the main shaft (11) is fixedly sleeved with a synchronous wheel (10), the output end of the servo motor (2) is drivingly connected with the synchronous wheel (10) through a synchronous belt (8).

2. The polishing apparatus of claim 1, wherein The end of the mechanical arm interface flange (15) away from the back plate (19) is fixedly connected with a six-dimensional force sensor (16).

3. The polishing apparatus of claim 1, wherein The polishing head connecting rod (12) and the polishing head (14) are fixedly connected through a polishing head seat (13).

4. The polishing apparatus of claim 1, wherein The bottom plate (20) is fixedly connected with a linear guide rail (18) corresponding to the sliding block (5).

5. The polishing apparatus of claim 1, wherein One side of the spline angular support (4) is fixedly connected with a grating ruler (9), one side of the spline angular support (4) is fixedly connected with a reading head (6) corresponding to the grating ruler (9).

6. The polishing apparatus of claim 1, wherein The fixed connection plate (21) is provided with a sliding opening corresponding to the main shaft (11).

7. The polishing apparatus of claim 1, wherein The two ends of the steel cable (23) are fixedly connected with the spline angular support (4) and the counterweight (17) through fastening bolts respectively.

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