CN214213414U - Segmented pressure regulating type air bag polishing head - Google Patents
Segmented pressure regulating type air bag polishing head Download PDFInfo
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- CN214213414U CN214213414U CN202022813654.XU CN202022813654U CN214213414U CN 214213414 U CN214213414 U CN 214213414U CN 202022813654 U CN202022813654 U CN 202022813654U CN 214213414 U CN214213414 U CN 214213414U
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- air bag
- diaphragm
- air
- back plate
- polishing head
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Abstract
The utility model discloses a sectional pressure regulating type air bag polishing head, which comprises a back plate, a diaphragm and an air bag group consisting of at least two air bags; the back plate is connected with the periphery of the diaphragm, a sealed cabin is formed between the back plate and the diaphragm, the diaphragm is basin-shaped, and the bottom of the diaphragm is a circular plane; each air bag of the air bag group is concentrically and annularly arranged in the sealed cabin, the air bag group at least comprises a main pressure air bag positioned in the middle and a side pressure air bag positioned on the outer ring, each air bag is provided with an air valve, the air valve penetrates through a hole in the back plate to be connected with an air pipe, and the other end of the air pipe is connected with an air pump. The utility model discloses an annular gasbag group mechanism can carry out real time control to the atmospheric pressure of annular gasbag group, realizes from this that the atmospheric pressure to each position of rubbing head is real-time adjustable, solves the marginal effect problem.
Description
Technical Field
The utility model relates to a technical field of gasbag polishing particularly, relates to a segmentation pressure regulating formula gasbag rubbing head.
Background
High quality optical elements are very important in modern technology. In particular high quality aspheric optical elements. The concept of a massive terrestrial telescope is a significant technical challenge, particularly with regard to the fabrication of the optical components necessary to achieve very demanding performance. Very large terrestrial telescopes require many high quality large diameter optical elements to construct.
The use of ultra-precision optical polishing is based on computer-controlled optical surface fabrication. In contrast to other polishing methods, air-filled polishing heads are used as precision polishing tools that are flexible and can be well adapted to the shape of the part. As with other polishing techniques, edge quality is a critical factor affecting optical element performance.
A national invention patent entitled "a bladder polishing tool, system and method" having publication No. CN 104369064B discloses a bladder polishing tool based on an electrical proportional valve that can control the contact pressure and contact pressure of the polishing surface in real time. Comprises a motor, a speed reducer, a hollow rotating shaft and an air bag. The idle shaft is provided with a hollow cavity, two ends of the hollow cavity are respectively connected with the air bag and the vent pipe, the vent pipe is provided with an electric proportional valve, and the polishing air bag comprises a pressure sensor for detecting positive pressure. This patent can improve the machining precision, simplifies the polishing process, reduces the processing cost, nevertheless to the marginal effect problem that optical element produced in the course of working, can not effectual solution, leads to marginal machining precision very low.
The 'flexible air bag conformal polishing tool system' disclosed in the grant publication No. CN 207629812U adopts a turning type layout method that a motor is separated from a main shaft, so that air can enter the air bag through a rotary joint and a hollow shaft, and the problem that an air bag polishing tool head is easy to wind is avoided. It also does not solve the edge effect problem.
CN201010156371.0 discloses a main combined type gasbag polishing tool of assisting, its gasbag intussuseption is filled with a plurality of solid pressing sub-gasbags and a plurality of controllable pressing sub-gasbags, and this technique has increased supplementary gasbag control link, has improved the controllability to gasbag inner structure, and the inside combination property of gasbag is good, satisfies the variability demand. However, this patent application does not solve the problem of edge effect even if a plurality of air bags are provided.
In a word, the existing air bag polishing mechanism mostly solves the problem of directly inflating an air bag head and improves the processing precision by changing the contact pressure. The problem that the pressure generated by different positions of the air bag polishing head is different when the air bag polishing head is in contact with a workpiece is ignored, and the problem is directly brought about by an edge effect problem, namely the phenomenon that the edge is easy to warp or collapse in the machining process is easy to occur, and the phenomenon is particularly obvious for a flat-bottom polishing disk.
Therefore, a polishing device based on an air bag type is needed, which can solve the problem of edge effect caused by different pressures generated at different processing positions, and further improve the polishing precision.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a segmentation pressure regulating formula gasbag rubbing head is provided, this rubbing head solves the different problems of pressure that different processing positions produced through the segmentation pressure regulating, and then improves edge effect, improves polishing precision.
In order to solve the technical problem, the technical solution of the utility model is that:
a sectional pressure-regulating type air bag polishing head comprises a back plate, a diaphragm and an air bag group consisting of at least two air bags; the back plate is connected with the periphery of the diaphragm, a sealed cabin is formed between the back plate and the diaphragm, the diaphragm is basin-shaped, and the bottom of the diaphragm is a circular plane; each air bag of the air bag group is concentrically and annularly arranged in the sealed cabin, the air bag group at least comprises a main pressure air bag positioned in the middle and a side pressure air bag positioned on the outer ring, each air bag is provided with an air valve, the air valve penetrates through a hole in the back plate to be connected with an air pipe, and the other end of the air pipe is connected with an air pump.
Preferably, the airbag module further comprises one or more auxiliary pressure airbags located between the main pressure airbag and the side pressure airbag.
Preferably, the device further comprises a fixed connecting structure for pressing and fixing the peripheral edges of the back plate and the diaphragm.
Preferably, the fixed connection structure comprises a locking nut and a flange plate, the sleeve below the flange plate is screwed in the locking nut, and the periphery edges of the back plate and the diaphragm are pressed and fixed by the sleeve below the flange plate and the step in the locking nut.
Preferably, the side wall of the sleeve below the flange plate is provided with a plurality of through holes, and the air pipe extends out of the through holes.
Preferably, the fixed connection structure comprises a locking nut and a sleeve, the sleeve is screwed in the locking nut, and the lower part of the sleeve and a step in the locking nut press and fix the peripheral edges of the back plate and the diaphragm together.
Preferably, a polishing pad is adhered to the bottom of the diaphragm.
Preferably, the air valve is connected with the air pipe through a quick-change connector.
After adopting above-mentioned scheme, compare with current gasbag rubbing head, the utility model has the following outstanding characteristics:
by adopting the annular air bag group mechanism, the air pressure of the annular air bag group can be controlled in real time, so that the air pressure at each position of the polishing head can be adjusted in real time. In the process of air bag polishing, a to-be-polished piece is contacted with a polishing head to realize polishing operation in a certain path, pressure and angle, but when the to-be-polished piece is polished to the edge of a workpiece, the polishing head is partially out of the workpiece, so that the pressure on the surface of the workpiece is changed, and the removal amount is changed. The pressure change of the contact position can be regulated and controlled by changing the air pressure of each position of the polishing head, so that the aim of balancing the removal amount is fulfilled. The specific implementation mode can be that an electromagnetic overflow valve is arranged on a pipeline between the air pump and the air pipe, so that the input pressure of the air pump is controlled in real time, and the air pressure of each position of the polishing head is adjustable in real time.
Therefore, utilize the utility model discloses can ensure that polishing in-process air bag head atmospheric pressure is regulated and control in real time, polishing precision is high, the gas tightness is strong, advantage such as protecting effect is good, consequently has very big research value and feasibility.
Drawings
Fig. 1 is a front schematic view of the present invention;
fig. 2 is a rear schematic view of the present invention;
FIG. 3 is a schematic rear view of the half-section of the present invention;
fig. 4 is a schematic view of the installation position of the annular air bag unit of the present invention;
FIG. 5 is a schematic view of the present invention after covering the back plate;
fig. 6 is a schematic structural view of the lock nut of the present invention;
fig. 7 is a schematic structural view of the annular air bag unit of the present invention;
fig. 8 is a schematic half-sectional view of another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a sectional pressure regulating formula gasbag polishing head, as shown in fig. 1-7, is one of the preferred embodiment of the gasbag polishing head of the utility model. The air bag polishing head comprises a back plate 11, a diaphragm 12 and an air bag group consisting of at least two air bags. Wherein:
the back plate 11 and the diaphragm 12 are connected together at their peripheries, specifically, they can be connected by screws, and a sealed chamber 13 is formed between them. The diaphragm 12 is basin-shaped, and the bottom of the diaphragm is a circular plane. The material of the back plate 11 can be 45# steel, and the material of the diaphragm 12 can be a sealing diaphragm made of rubber.
The air bags of the air bag group are concentrically and annularly arranged in the sealed chamber 13, the air bag group at least comprises a main pressure air bag 14 positioned in the middle and a side pressure air bag 15 positioned in the outer ring, and one or more auxiliary pressure air bags 16 can be arranged between the main pressure air bag 14 and the side pressure air bag 15. In the present embodiment, three air bags, namely, a main pressure air bag 14, an auxiliary pressure air bag 16 and a side pressure air bag 15 are provided, and the three air bags in the air bag group have different diameters but are concentric.
Each air bag of the air bag group is provided with an air valve 17, a hole is formed in the back plate 11 at a position opposite to the air valve 17, each air valve 17 is arranged in one hole and penetrates out of the back plate 11 to be connected with an air pipe 18, and the air valves 17 and the air pipe 18 can be connected through a quick-change connector (not shown in the figure). The other end of each air pipe 18 is connected with a different air pump (not shown in the figure); therefore, the inflation and deflation of each air bag of the air bag set are controlled by controlling the air pressure of each air pump, and the pressure change generated by the air bag set is reflected on the diaphragm 12 in real time due to the action of the back plate 11.
Further, the airbag polishing head further comprises a fixing connection structure 19, the fixing connection structure 19 is used for pressing and fixing the periphery of the back plate 11 and the diaphragm 12 to prevent air leakage of the sealed chamber 13, and the whole airbag polishing head can be mounted on a polishing machine or a connection mechanism. Specifically, the fixed connection structure 19 according to this embodiment includes a lock nut 191 and a flange 192, the sleeve below the flange 192 is screwed into the lock nut 191, and the lower part of the sleeve and the step in the lock nut 191 press and fix the peripheral edges of the back plate 11 and the diaphragm 12 together. And flange 192 may be mounted on the end flange of the industrial robot in use to mount the entire bladder polishing head on the polishing robot. In addition, the side wall of the sleeve below the flange 192 may be provided with a plurality of through holes, and the air pipe 18 extends out of the through holes and is connected with each air pump through a pipeline.
For further polishing, a polishing pad 10 can be adhered to the bottom of the membrane 12; specifically, the bottom of the membrane 12 is a circular plane, and the polishing pad 10 is cut to a corresponding size and directly attached to the circular plane of the bottom of the membrane 12. Before polishing, a to-be-polished piece is fixed on a rotary worktable 9 of the polishing machine, and the air bag polishing head is arranged on a robot and is contacted with the to-be-polished piece on the rotary worktable 9 according to a certain path to perform polishing operation under the action of a polishing pad 10.
In order to further achieve the purpose of improving the edge effect in the process of polishing the plane, the air bag group realizes the change of the removal amount in the polishing process through different pressure changes. Specifically, the airbag polishing head polishes the to-be-polished piece according to a certain path under the action of a robot, when the airbag polishing head reaches the outermost end of the to-be-polished piece, the polishing pad 10 starts to move out of the surface of the workpiece, the pressure intensity is increased due to the reduction of the contact surface, and the pressure of the side pressure airbag 15 in the airbag group is reduced to balance the increased pressure intensity; when the air bag polishing head continues to move towards the outer ring, the pressure of the auxiliary pressure air bag 16 in the air bag group is reduced; when the air bag polishing head moves to the outermost circle, the pressure of the main pressure air bag 14 in the air bag group is reduced, so that the aim of improving the edge effect in the process of polishing the plane can be achieved. The control of the air pressure or the air inflation/deflation of each air bag can be controlled by an electromagnetic overflow valve arranged on a pipeline connecting the air pipe 18 and the air pump.
As shown in fig. 8, in another embodiment of the polishing head with air bag according to the present invention, the polishing head also includes a back plate 11, a membrane 12 and an air bag set composed of at least two air bags, and the components are the same as the above embodiments and have the same reference numerals, and will not be described in detail herein.
The difference of the embodiment is that: the fixed connection structure 19 includes a locking nut 191 and a sleeve 193, the sleeve 193 is screwed into the locking nut 191, and the lower side of the sleeve 193 and a step in the locking nut 191 press and fix the peripheral edges of the back plate 11 and the diaphragm 12 together. The present embodiment is configured for a rotary polishing head, that is, when performing polishing operation, the air bag polishing head is screwed and fixed below a rotary spindle of a polishing machine by a lock nut 191, so as to implement mounting of the polishing head.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that all changes and modifications made according to the claims and the specification of the present invention should fall within the scope covered by the present invention.
Claims (8)
1. The utility model provides a segmentation pressure regulating formula gasbag polishing head which characterized in that: comprises a back plate (11), a diaphragm (12) and an air bag group consisting of at least two air bags; the back plate (11) is connected with the periphery of the diaphragm (12) together, a sealed cabin (13) is formed between the back plate and the diaphragm, the diaphragm (12) is basin-shaped, and the bottom of the diaphragm is a circular plane; each air bag of the air bag group is concentrically and annularly arranged in the sealed cabin (13), the air bag group at least comprises a main pressure air bag (14) positioned in the middle and a side pressure air bag (15) positioned on an outer ring, each air bag is provided with an air valve (17), the air valve (17) penetrates through a hole in the back plate (11) to be connected with an air pipe (18), and the other end of the air pipe (18) is connected with an air pump.
2. The segmented pressure regulating type air bag polishing head as claimed in claim 1, wherein: the airbag module further comprises one or more auxiliary pressure airbags (16) located between the main pressure airbag (14) and the side pressure airbag (15).
3. The segmented pressure regulating type air bag polishing head as claimed in claim 1 or 2, wherein: further comprises a fixed connecting structure (19) for pressing and fixing the peripheral edges of the back plate (11) and the diaphragm (12).
4. The segmented pressure regulating type air bag polishing head as claimed in claim 3, wherein: the fixed connecting structure (19) comprises a locking nut (191) and a flange plate (192), a sleeve below the flange plate (192) is screwed in the locking nut (191), and the lower part of the sleeve and a step in the locking nut (191) press and fix the peripheral edges of the back plate (11) and the diaphragm (12).
5. The segmented pressure regulating type air bag polishing head as claimed in claim 4, wherein: the side wall of the sleeve below the flange (192) is provided with a plurality of through holes, and the air pipe (18) extends out of the through holes.
6. The segmented pressure regulating type air bag polishing head as claimed in claim 3, wherein: the fixed connecting structure (19) comprises a locking nut (191) and a sleeve (193), the sleeve (193) is screwed in the locking nut (191), and the lower part of the sleeve and a step in the locking nut (191) press and fix the peripheral edges of the back plate (11) and the diaphragm (12).
7. The segmented pressure regulating type air bag polishing head as claimed in claim 1 or 2, wherein: the bottom of the diaphragm (12) is adhered with a polishing pad (10).
8. The segmented pressure regulating type air bag polishing head as claimed in claim 1 or 2, wherein: the air valve (17) is connected with the air pipe (18) through a quick-change connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022813654.XU CN214213414U (en) | 2020-11-29 | 2020-11-29 | Segmented pressure regulating type air bag polishing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022813654.XU CN214213414U (en) | 2020-11-29 | 2020-11-29 | Segmented pressure regulating type air bag polishing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214213414U true CN214213414U (en) | 2021-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022813654.XU Active CN214213414U (en) | 2020-11-29 | 2020-11-29 | Segmented pressure regulating type air bag polishing head |
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| Country | Link |
|---|---|
| CN (1) | CN214213414U (en) |
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- 2020-11-29 CN CN202022813654.XU patent/CN214213414U/en active Active
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