Polishing unit and linear polishing machine

Abstract

The utility model discloses a polishing unit and a linear polishing machine comprising the same. The bearing assembly is used for supporting and fixing a workpiece to be polished and comprises a rotary driving mechanism, a rotary shaft, an eccentric bearing and a workpiece carrying table, the rotary driving mechanism is connected with the first end of the rotary shaft, the eccentric bearing is connected with the second end of the rotary shaft in a sleeving mode, and the workpiece carrying table is connected to the eccentric bearing; the polishing assembly is used for polishing the to-be-polished workpiece and comprises a sliding connecting plate and a polishing grinding head, and the polishing grinding head is arranged above the workpiece carrying table and connected to the sliding connecting plate through a self-adaptive adjusting mechanism; the driving assembly is used for driving the polishing assembly and comprises an X-axis driving module, a Y-axis driving module and a Z-axis driving module which are sequentially in transmission connection, and the sliding connecting plate is connected to the Z-axis driving module. The polishing unit can ensure that the contact surface of the polishing and grinding head is tightly attached to the surface of the workpiece to be polished so as to improve the polishing quality and the operation efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of polishing equipment, and in particular relates to a polishing unit and a linear polishing machine comprising the polishing unit. Background Art

[0002] Polishing refers to a processing method that uses mechanical, chemical or electrochemical effects to reduce the surface roughness of a workpiece to obtain a bright and smooth surface. It is a modification process on the surface of a workpiece using polishing tools and abrasive particles or other polishing media. Existing polishing equipment usually fixes the workpiece to be polished on a support table, and then drives the polishing head above to rotate or reciprocate linearly to polish the surface of the workpiece to be polished. The polishing efficiency needs to be improved. On the other hand, during the polishing process, if the workpiece to be polished is not properly clamped on the support table and tilts, or the polishing head is worn due to long-term use, the contact surface of the polishing head cannot fit tightly with the surface of the workpiece to be polished. This will not only affect the polishing quality, but also extend the polishing cycle and reduce operating efficiency. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a polishing unit and a linear polishing machine including the polishing unit to solve the problem of how to ensure that the contact surface of the polishing head is in close contact with the surface of the workpiece to be polished and improve the working efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A polishing unit comprising:

[0006] A bearing assembly for supporting and fixing a workpiece to be polished, the bearing assembly comprising a rotary drive mechanism, a rotary shaft, an eccentric bearing and a workpiece carrier, the rotary drive mechanism being connected to a first end of the rotary shaft, the eccentric bearing being sleeved to a second end of the rotary shaft, and the workpiece carrier being connected to the eccentric bearing;

[0007] A polishing assembly for polishing a workpiece to be polished, the polishing assembly comprising a sliding connection plate and a polishing grinding head, the polishing grinding head being arranged relatively above the workpiece carrier, and the polishing grinding head being connected to the sliding connection plate through an adaptive adjustment mechanism;

[0008] A driving assembly for driving the polishing assembly comprises an X-axis driving module, a Y-axis driving module and a Z-axis driving module which are sequentially connected in transmission, and the sliding connecting plate is connected to the Z-axis driving module.

[0009] Preferably, the rotary drive mechanism comprises a rotary motor and a pulley, the first end of the rotary shaft is connected to the pulley, and the pulley is connected to an output end of the rotary motor via a transmission belt.

[0010] Preferably, the bearing assembly further comprises a support bearing, wherein the support bearing is located between the pulley and the eccentric bearing, and the rotating shaft passes through the support bearing.

[0011] Preferably, the adaptive adjustment mechanism includes a sleeve, a first bearing, a second bearing, a rotating pin, an adapter plate and a fixed plate; the sleeve is fixedly inserted on the sliding connecting plate, the first bearing is embedded in the first end of the sleeve, the second bearing is embedded in the second end of the sleeve, the first end of the rotating pin passes through the second bearing and the sleeve is sleeved in the first bearing, the adapter plate is sleeved on the second end of the rotating pin so that the adapter plate can rotate relative to the sleeve, the first end of the fixed plate is connected to the adapter plate, and the sleeve is provided with a limiter for limiting the rotation angle range of the adapter plate; wherein, the polishing grinding head is connected to the second end of the fixed plate.

[0012] Preferably, the Z-axis drive module includes a slide cylinder, the top of the sliding connecting plate is connected to the slide rail of the slide cylinder, the middle of the sliding connecting plate is connected to the output shaft of the slide cylinder through the driving connecting plate, and the polishing head is connected to the bottom end of the sliding connecting plate through the adaptive adjustment mechanism.

[0013] Preferably, the output shaft of the slide cylinder is connected to a floating joint connecting plate, and the driving connecting plate is connected to the floating joint connecting plate via a pressure sensor.

[0014] Preferably, the slide cylinder is connected with a lifting limit assembly, and the lifting limit assembly includes a limit plate, a first limit column, a second limit column and a rocker arm; the limit plate is connected to the side plate of the cylinder mounting seat, and a limit through hole extending along the Z-axis direction is opened in the limit plate, and a locking card hole is arranged on the upper side of the limit through hole; the first limit column and the second limit column are connected to the side of the sliding connecting plate with an interval between each other up and down; the first end of the rocker arm is hinged on the side plate of the cylinder mounting seat, and the second end of the rocker arm passes through the limit through hole and extends from between the first limit column and the second limit column, and the rocker arm abuts against the first limit column and the second limit column respectively.

[0015] Preferably, the lower end of the slide cylinder is connected to a first precision pressure regulating valve, and the upper end of the slide cylinder is connected to a second precision pressure regulating valve; the first precision pressure regulating valve is configured to control the pressure in the slide cylinder so that it has an upward force to offset the self-gravity of the polishing assembly, and the second precision pressure regulating valve is configured to control the pressure in the slide cylinder to achieve reciprocating movement in the Z-axis direction.

[0016] Another aspect of the present utility model is to provide a linear polishing machine, which includes a frame and the polishing unit as described above assembled in the frame.

[0017] Preferably, the linear polishing machine includes a plurality of the polishing units, and the plurality of polishing units are arranged in sequence in the frame and can be independently controlled respectively.

[0018] In the polishing unit and the corresponding linear polishing machine provided by the embodiments of the present utility model, the polishing heads in the polishing assembly are connected through an adaptive adjustment mechanism. Under the action of force, the polishing heads can swing flexibly within a certain angle range until the contact surface of the polishing heads is closely attached to the surface of the workpiece to be polished, thereby improving the polishing quality and operation efficiency. In addition, the bearing assembly includes a rotary drive mechanism, a rotary shaft, an eccentric bearing, and a workpiece stage. During the polishing operation, not only the polishing heads are driven to move relative to the workpiece stage, but the workpiece stage itself can also be driven to vibrate (swing), thereby further improving the polishing efficiency. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the linear polishing machine in the embodiments of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the polishing unit in the embodiments of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the bearing assembly in the embodiments of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the adaptive adjustment mechanism in the embodiments of the present utility model;

[0023] Figure 5 is an exploded view of the adaptive adjustment mechanism in the embodiments of the present utility model;

[0024] Figure 6 is a structural diagram showing the connection between the polishing assembly and the slide cylinder in the embodiments of the present utility model;

[0025] Figure 7 is a structural diagram showing the connection between the lifting limit assembly and the slide cylinder in the embodiments of the present utility model. Detailed Embodiments

[0026] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following describes the detailed embodiments of the present utility model with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of the present utility model shown in the drawings and described according to the drawings are merely exemplary, and the present utility model is not limited to these embodiments.

[0027] It should be noted that in the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Here, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0029] The embodiments of the present invention provide a polishing unit and a linear polishing machine including the polishing unit. As Figure 1 shown, the linear polishing machine includes a frame 200 and a polishing unit 100 assembled in the frame 200. Specifically, in this embodiment, the linear polishing machine includes a plurality of the polishing units 100, and the plurality of the polishing units 100 are arranged in sequence in the frame 200 and can be independently controlled respectively.

[0030] Among them, as Figure 1 shown, the frame 200 is provided with a polishing tank 201, and the workpiece stage 14 and the polishing head 22 of the polishing unit 100 are located in the polishing tank 201. The frame 200 is also equipped with a polishing liquid spraying mechanism (not shown in the drawings) for spraying polishing liquid on the workpiece during the polishing operation.

[0031] It should be noted that for the loading and unloading of the workpiece to be polished in the linear polishing machine provided in this embodiment, it can be manually loaded and unloaded, or it can be automatically loaded and unloaded by equipping an AGV cart and a manipulator.

[0032] Referring to Figure 2 , the polishing unit 100 provided by the embodiments of the present invention mainly includes a carrying component 1 for supporting and fixing the workpiece to be polished, a polishing component 2 for polishing the workpiece to be polished, and a driving component 3 for driving the polishing component 2.

[0033] Among them, as Figure 2 and Figure 3As shown in the figure, the carrier assembly 1 includes a rotary drive mechanism 11, a rotary shaft 12, an eccentric bearing 13, and a workpiece stage 14. The rotary drive mechanism 11 is connected to the first end of the rotary shaft 12. The eccentric bearing 13 is sleeved on the second end of the rotary shaft 12. The workpiece stage 14 is connected to the eccentric bearing 13. The rotary drive mechanism 11 drives the rotary shaft 12 to rotate. The eccentric bearing 13 sleeved on the second end of the rotary shaft 12 vibrates, thereby driving the workpiece stage 14 to vibrate. Therefore, the carrier assembly 1 in this embodiment is a vibratable carrier assembly.

[0034] Specifically, in this embodiment, the rotary drive mechanism 11 includes a rotary motor 15 and a pulley 16. The first end of the rotary shaft 12 is connected to the pulley 16. The pulley 16 is connected to the output end of the rotary motor 15 through a transmission belt 17. The rotary motor 15 drives the rotary shaft 12 to rotate through the pulley 16.

[0035] Further, in this embodiment, the carrier assembly 1 further includes a support bearing 18. The support bearing 18 is located between the pulley 16 and the eccentric bearing 14. The rotary shaft 12 is disposed through the support bearing 18.

[0036] Further, the workpiece stage 14 is preferably a profiling jig prepared according to the shape of the workpiece to be polished.

[0037] Among them, referring to Figure 2 , the polishing assembly 2 includes a sliding connection plate 21 and a polishing head 22. The polishing head 22 is disposed relatively above the workpiece stage 14. The polishing head 22 is connected to the sliding connection plate 21 through an adaptive adjustment mechanism 23.

[0038] Among them, referring to Figure 2, the driving assembly 3 includes an X-axis driving module 31, a Y-axis driving module 32, and a Z-axis driving module 33 that are sequentially connected in transmission. The sliding connection plate 21 is connected to the Z-axis driving module 33. Specifically, the X-axis driving module 31 is a linear driving mechanism, which can be selected as a linear motor, for example. The X-axis driving module 31 is configured to drive the interconnected Y-axis driving module 32, Z-axis driving module 33, and sliding connection plate 21 to reciprocate in the X-axis direction, thereby being able to drive the polishing assembly 2 to reciprocate in the X-axis direction. The Y-axis driving module 32 is a linear driving mechanism, which can be selected as a linear motor, for example. The Y-axis driving module 32 is configured to drive the interconnected Z-axis driving module 33 and sliding connection plate 21 to reciprocate in the Y-axis direction, thereby being able to drive the polishing assembly 2 to reciprocate in the Y-axis direction. The Z-axis driving module 33 is a linear driving mechanism, which can be selected as a cylinder, for example. The Z-axis driving module 33 is configured to drive the sliding connection plate 21 to reciprocate in the Z-axis direction, thereby being able to drive the polishing assembly 2 to reciprocate in the Z-axis direction.

[0039] Specifically, in this embodiment, as Figure 4 and Figure 5 shown, the adaptive adjustment mechanism 23 includes a bushing 231, a first bearing 232, a second bearing 233, a rotating pin shaft 234, an adapter plate 235, and a fixing plate 236. Specifically, the bushing 231 is fixedly inserted into the sliding connection plate 21. The first bearing 232 is embedded at the first end of the bushing 231. The second bearing 233 is embedded at the second end of the bushing 231. The first end of the rotating pin shaft 234 passes through the second bearing 233 and the bushing 231 and is sleeved in the first bearing 232. The adapter plate 235 is sleeved on the second end of the rotating pin shaft 234. The first end of the fixing plate 236 is connected to the adapter plate 235. The polishing head 22 is connected to the second end of the fixing plate 236.

[0040] As described above for the adaptive adjustment mechanism 23, the adapter plate 235 can rotate relative to the bushing 231 along with the rotation pin 234, thereby driving the polishing head 22 to swing flexibly relative to the sliding connection plate 21. Thus, the polishing head 22 has space for adaptive adjustment according to the surface of the workpiece to be polished. Specifically, when the Z-axis drive module 33 drives the sliding connection plate 21 to drive the polishing head 22 to press against the surface of the workpiece to be polished, under the condition of being stressed at both ends (the downward pressing force of the sliding connection plate 21 and the reverse force of the workpiece to be polished), the polishing head can rotate until the contact surface of the polishing head is in close contact with the surface of the workpiece to be polished. It should be noted that although the polishing head 22 can only rotate around the rotation pin 234, during the polishing operation, the X-axis drive module 31 and the Y-axis drive module 32 drive the polishing assembly 2 to reciprocate in the X-axis direction and the Y-axis direction simultaneously, that is, the movement trajectory of the polishing head 22 relative to the workpiece to be polished is approximately a circular motion. Therefore, the contact surface of the polishing head can be in close contact with all positions of the surface of the workpiece to be polished.

[0041] Further, to prevent the polishing head 22 from rotating excessively, for example, rotating 180° so that the contact surface of the polishing head 22 faces away from the surface of the workpiece to be polished, a limiting member 237 for limiting the rotation angle range of the adapter plate 235 is provided on the bushing 231. In this embodiment, as Figure 4 and Figure 5 , one limiting member 237 is provided on each side of the adapter plate 235 on the end surface of the bushing 231. There is a certain distance between the limiting member 237 and the adapter plate 235. When the adapter plate 235 rotates left and right (swings) and presses against the limiting member 237, it cannot swing further. Therefore, the polishing head 22 can only swing flexibly within a certain angle range. The specific angle range that can be swung can be adjusted by adjusting the distance between the limiting member 237 and the adapter plate 235. For example, the swing angle can be limited to ±20° or ±30°.

[0042] Specifically, in this embodiment, referring to Figure 6 , the Z-axis drive module 33 includes a slide cylinder 33a. The top end of the sliding connection plate 21 is connected to the slide rail 331 of the slide cylinder 33a. The middle part of the sliding connection plate 21 is connected to the output shaft 333 of the slide cylinder 33a through a drive connection plate 332. The polishing head 22 is connected to the bottom end of the sliding connection plate 21 through the adaptive adjustment mechanism 23.

[0043] In this embodiment, as Figure 6As shown, the output shaft 333 of the sliding table cylinder 33a is connected to a floating joint connecting plate 334, and the driving connecting plate 332 is connected to the floating joint connecting plate 334 through a pressure sensor 335. The pressure sensor 335 is used to detect and obtain the pressure of the sliding table cylinder 33a driving the polishing assembly 2 to press against the workpiece to be polished on the workpiece carrier 14, and feedback the pressure value to the control system of the linear polishing machine. The upper limit value and the lower limit value of the pressure can be set in the control system. When the pressure value detected and feedback by the pressure sensor 335 exceeds the upper limit value and the lower limit value range, the control system gives an alarm prompt.

[0044] Further, in this embodiment, a first precision pressure regulating valve (not shown in the drawings) is connected to the lower end of the sliding table cylinder 33a, and a second precision pressure regulating valve (not shown in the drawings) is connected to the upper end of the sliding table cylinder 33a. The first precision pressure regulating valve is configured to control the pressure in the sliding table cylinder 33a to have an upward acting force to offset the self-weight of the polishing assembly 2, and the second precision pressure regulating valve is configured to control the pressure in the sliding table cylinder 33a to realize reciprocating movement in the Z-axis direction, that is, the second precision pressure regulating valve can control the pressure exerted by the polishing assembly 2 on the workpiece to be polished during the polishing operation. Since the self-weight of the polishing assembly 2 is offset by the control of the first precision pressure regulating valve, therefore, during the polishing operation, the pressure exerted on the workpiece to be polished can be more precisely controlled, which is beneficial to improving the polishing quality.

[0045] Further, in this embodiment, refer to Figure 2 and Figure 7 , a lifting limit assembly 4 is connected to the sliding table cylinder 33a. The lifting limit assembly 4 includes a limit plate 41, a first limit post 42, a second limit post 43 and a swing rod 44. The limit plate 41 is connected to the side plate of the cylinder mounting seat. A limit through hole 411 extending in the Z-axis direction is formed in the limit plate 41, and a locking hole 412 is provided on the upper side of the limit through hole 411. The first limit post 42 and the second limit post 43 are connected to the side surface of the sliding connecting plate 21 at intervals in the up and down direction, specifically, they are connected to the side surface of the sliding connecting plate 21 through a connecting member 45. The first end of the swing rod 44 is hinged to the side plate of the cylinder mounting seat, the second end of the swing rod 44 passes through the limit through hole 411 and extends out between the first limit post 42 and the second limit post 43, and the swing rod 44 is respectively in contact with the first limit post 42 and the second limit post 43.

[0046] The lifting limit component 4 described above has the following limit operation process: when the sliding connection plate 21 is driven by the slide cylinder 33a to slide downward, the first limit post 42 drives the swing rod 44 to swing downward. When the swing rod 44 swings to the lowermost end of the limit through hole 411, the first limit post 42 presses against the swing rod 44, and the sliding connection plate 21 cannot continue to slide downward. When the sliding connection plate 21 is driven by the slide cylinder 33a to slide upward, the second limit post 43 drives the swing rod 44 to swing upward. When the swing rod 44 swings to the uppermost end of the limit through hole 411, the second limit post 43 presses against the swing rod 44, and the sliding connection plate 21 cannot continue to slide upward. Thus, the lifting limit component 4 can limit the lifting stroke of the sliding connection plate 21.

[0047] Further, for the lifting limit component 4 described above, the lifting and sliding of the sliding connection plate 21 can be controlled by manually lifting or pressing down the swing rod 44. When manually lifting the swing rod 44 to control the upward movement of the sliding connection plate 21 and driving the polishing component 2 to rise away from the workpiece to be polished below, the swing rod 44 can be pushed into the locking card hole 412 to lock the height position and prevent the polishing component 2 from automatically sliding down.

[0048] In summary, for the polishing unit and the corresponding linear polishing machine provided in the above embodiments, the polishing heads in the polishing component are connected by an adaptive adjustment mechanism. Under force, the polishing heads can flexibly swing within a certain angle range until the contact surface of the polishing heads is closely attached to the surface of the workpiece to be polished, thereby improving the polishing quality and operation efficiency. In addition, based on the vibratable bearing component, during the polishing operation, not only are the polishing heads driven to move relative to the workpiece stage, but the workpiece stage itself can also be driven to vibrate (swing), thereby further improving the polishing efficiency.

[0049] The above description is only the specific implementation manners of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A polishing unit, characterized in that, include: A bearing assembly for supporting and fixing a workpiece to be polished, the bearing assembly comprising a rotary drive mechanism, a rotary shaft, an eccentric bearing and a workpiece carrier, the rotary drive mechanism being connected to a first end of the rotary shaft, the eccentric bearing being sleeved to a second end of the rotary shaft, and the workpiece carrier being connected to the eccentric bearing; A polishing assembly for polishing a workpiece to be polished, the polishing assembly comprising a sliding connection plate and a polishing grinding head, the polishing grinding head being arranged relatively above the workpiece carrier, and the polishing grinding head being connected to the sliding connection plate through an adaptive adjustment mechanism; A driving assembly for driving the polishing assembly comprises an X-axis driving module, a Y-axis driving module and a Z-axis driving module which are sequentially connected in transmission, and the sliding connecting plate is connected to the Z-axis driving module.

2. The polishing unit according to claim 1, wherein The rotary drive mechanism includes a rotary motor and a pulley, wherein a first end of the rotary shaft is connected to the pulley, and the pulley is connected to an output end of the rotary motor through a transmission belt.

3. The polishing unit according to claim 2, characterized in that, The bearing assembly further comprises a support bearing, wherein the support bearing is located between the pulley and the eccentric bearing, and the rotating shaft is passed through the support bearing.

4. The polishing unit according to claim 1, characterized in that, The adaptive adjustment mechanism includes a sleeve, a first bearing, a second bearing, a rotating pin, an adapter plate and a fixed plate; the sleeve is fixedly inserted on the sliding connection plate, the first bearing is embedded in the first end of the sleeve, the second bearing is embedded in the second end of the sleeve, the first end of the rotating pin passes through the second bearing and the sleeve is sleeved in the first bearing, the adapter plate is sleeved on the second end of the rotating pin so that the adapter plate can rotate relative to the sleeve, the first end of the fixed plate is connected to the adapter plate, and the sleeve is provided with a limiter for limiting the rotation angle range of the adapter plate; wherein the polishing grinding head is connected to the second end of the fixed plate.

5. The polishing unit according to any one of claims 1-4, characterized in that, The Z-axis driving module includes a sliding cylinder, the top of the sliding connecting plate is connected to the sliding rail of the sliding cylinder, the middle of the sliding connecting plate is connected to the output shaft of the sliding cylinder through the driving connecting plate, and the polishing grinding head is connected to the bottom end of the sliding connecting plate through the adaptive adjustment mechanism.

6. The polishing unit according to claim 5, wherein The output shaft of the slide cylinder is connected with a floating joint connecting plate, and the driving connecting plate is connected to the floating joint connecting plate through a pressure sensor.

7. The polishing unit according to claim 5, wherein The slide cylinder is connected with a lifting limit assembly, which includes a limit plate, a first limit column, a second limit column and a rocker arm; the limit plate is connected to the side plate of the cylinder mounting seat, a limit through hole extending along the Z-axis direction is opened in the limit plate, and a locking card hole is arranged on the upper side of the limit through hole; the first limit column and the second limit column are connected to the side of the sliding connecting plate with an interval between each other up and down; the first end of the rocker arm is hinged on the side plate of the cylinder mounting seat, the second end of the rocker arm passes through the limit through hole and extends out from between the first limit column and the second limit column, and the rocker arm abuts against the first limit column and the second limit column respectively.

8. The polishing unit according to claim 5, characterized in that, The lower end of the sliding table cylinder is connected with a first precision pressure regulating valve, and the upper end of the sliding table cylinder is connected with a second precision pressure regulating valve; the first precision pressure regulating valve is configured to control the pressure in the sliding table cylinder to make it have an upward acting force to offset the self-gravity of the polishing assembly, and the second precision pressure regulating valve is configured to control the pressure in the sliding table cylinder to realize reciprocating movement in the Z-axis direction.

9. A linear polishing machine, characterized in that, It includes a frame and the polishing unit as described in any one of claims 1-8 assembled in the frame.

10. The linear polishing machine according to claim 9, characterized in that, The linear polishing machine includes a plurality of the polishing units, and the plurality of polishing units are arranged in sequence in the frame and can be independently controlled respectively.

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