CN113103160A - A flexible film circularly symmetrical circumferential preloading device - Google Patents
A flexible film circularly symmetrical circumferential preloading device Download PDFInfo
- Publication number
- CN113103160A CN113103160A CN202110377982.6A CN202110377982A CN113103160A CN 113103160 A CN113103160 A CN 113103160A CN 202110377982 A CN202110377982 A CN 202110377982A CN 113103160 A CN113103160 A CN 113103160A
- Authority
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- China
- Prior art keywords
- flexible film
- ring
- annular base
- pressure ring
- rubber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 39
- 238000003825 pressing Methods 0.000 claims abstract description 20
- 230000036316 preload Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 22
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 229920003052 natural elastomer Polymers 0.000 claims description 6
- 229920001194 natural rubber Polymers 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 229920005372 Plexiglas® Polymers 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims 2
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract 2
- 239000010408 film Substances 0.000 description 33
- 239000010409 thin film Substances 0.000 description 16
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000741 silica gel Substances 0.000 description 6
- 229910002027 silica gel Inorganic materials 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 4
- 230000035882 stress Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
本发明提供了一种柔性薄膜圆对称周向预紧装置，包括环形底座、压环(含两副橡胶圈)、紧固螺栓、柔性薄膜。其中环形底座作为主体结构件支撑柔性薄膜并与压环通过紧固螺栓连接，压环通过内嵌的内侧橡胶圈对薄膜施加摩擦力实现周向预紧，并通过内嵌的底侧橡胶圈施加正压力将薄膜牢牢锁紧。紧固螺栓均匀分布在环形底座与压环上，薄膜夹于压环和环形底座的间隙中，且薄膜边缘位于压环的底侧橡胶圈与紧固螺栓区间，不与紧固螺栓接触。首先将柔性薄膜裁剪为直径略小于紧固螺栓包络尺寸的圆形薄膜并平铺于环形底座上表面，接着将压环同心平行下压使薄膜被周向预紧，最后将紧固螺栓全部均匀拧紧将柔性薄膜锁死。
The invention provides a circularly symmetrical circumferential pre-tightening device for a flexible film, which comprises an annular base, a pressing ring (including two pairs of rubber rings), a fastening bolt and a flexible film. The annular base is used as the main structure to support the flexible film and is connected with the pressure ring through fastening bolts. The pressure ring exerts frictional force on the film through the embedded inner rubber ring to achieve circumferential preload, and is applied by the embedded bottom rubber ring. Positive pressure locks the membrane firmly. The tightening bolts are evenly distributed on the annular base and the pressure ring, the film is clamped in the gap between the pressure ring and the annular base, and the edge of the film is located between the rubber ring on the bottom side of the pressure ring and the tightening bolts, and does not contact the tightening bolts. First, cut the flexible film into a circular film with a diameter slightly smaller than the envelope size of the fastening bolt and lay it flat on the upper surface of the annular base, then press down the pressure ring concentrically and parallel to make the film be pre-tightened in the circumferential direction, and finally tighten all the fastening bolts. Tighten evenly to lock the flexible membrane.
Description
Technical Field
The invention belongs to the field of optical processing of flexible materials, and particularly relates to a circularly symmetric circumferential pre-tightening device for a flexible film.
Background
In the field of optical processing, rigid materials such as quartz, glass and the like are commonly used for lenses. The optical processing technology requires the material to have higher mechanical strength and surface stability so as to ensure enough processing precision. Flexible materials such as polymeric optical films have received much attention in recent years due to their great weight and cost advantages, but their poor mechanical strength and surface stability have prevented their direct application as optical lenses.
Disclosure of Invention
The invention provides a circular symmetry circumferential pre-tightening device for a flexible film, which is used for carrying out optical processing on a flexible material.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention is used for a flexible film circularly symmetric circumferential pre-tightening device, which comprises an annular base, a pressure ring, a fastening bolt and a flexible film, wherein a pair of rubber rings are embedded in the inner side and the bottom side of the pressure ring respectively; the connection relation is that the annular base is located at the bottom, the pressing ring is located at the top, the flexible film is clamped between the annular base and the pressing ring, and the pressing ring and the annular base are aligned, connected and fastened through the fastening bolt.
The corner of the boss of the annular base is rounded, the inward inclination angle of the outer side of the boss is 4 degrees, and the material selection includes but is not limited to aluminum alloy, stainless steel, carbon fiber and the like. The surface of the annular base, which is in contact with the flexible film, is required to be polished, so that the annular base is free of burrs and bulges and has low surface roughness.
The corner of the pressure ring is rounded, the inner side of the pressure ring is inward inclined at an angle of 4 degrees, and the material selection includes but is not limited to aluminum alloy, stainless steel, carbon fiber and the like. The surface of the compression ring in contact with the flexible film requires polishing, so that the compression ring is free of burrs and bulges and has lower surface roughness.
The inner side wall of the compression ring is embedded with a pair of inner side rubber rings, and the material selection includes but is not limited to natural rubber, silica gel, butadiene acrylonitrile rubber and the like. The pipe diameter of the inner rubber ring is selected in a reasonable interval, so that the inner rubber ring starts to contact the flexible film and exerts friction force at the upper edge of the boss of the annular base, and meanwhile, the lower edge of the pressing ring can contact the annular base.
A pair of bottom side rubber rings is embedded in the bottom side wall of the compression ring, and the material selection includes but is not limited to natural rubber, silica gel, butadiene acrylonitrile rubber and the like. The pipe diameter of the rubber ring at the bottom side is selected to be in a reasonable interval, so that the lower edge of the pressing ring can contact the annular base and apply enough positive pressure to the flexible film.
The fastening bolts are uniformly distributed on the circumference, and the number of the fastening bolts is not less than 6. Material selection includes, but is not limited to, stainless steel, aluminum alloys, and the like. The screw of the fastening bolt penetrates through the through hole of the pressure ring to enter the screw hole reserved in the annular base, and does not contact with the flexible film in the fastening process so as to avoid stress concentration.
The flexible film is required to be pre-cut into a circle with a reasonable diameter before pre-tightening, and the diameter is determined by the method that after the flexible film is pressed down and clamped between the pressing ring and the annular base, the outer edge of the flexible film is positioned between the rubber ring at the bottom side and the fastening bolt. Material choices include, but are not limited to, resins, plexiglass, silica gel, polyurethane, polyimide, and the like.
The device has the following working procedures: firstly, cutting the flexible film into a circular film with the diameter slightly smaller than the enveloping size of the fastening bolts, flatly paving the circular film on the upper surface of the annular base, then pressing the compression ring concentrically and parallelly downwards to enable the film to be pre-tightened circumferentially, and finally, completely and uniformly tightening the fastening bolts to lock the flexible film.
Compared with the prior art, the invention has the advantages that:
(1) compared with the mode of fixing the flexible film by adopting the adhesive in an adhesive bonding way, the problems of non-repeatability caused by the use of the adhesive, the limitation of transmittance on the curing of the adhesive and the decomposition and aging of the adhesive can be effectively avoided.
(2) Compared with the mode that the screw penetrates through the flexible film for fixing, the invention can effectively avoid the problems of stress concentration and nonuniform pretightening force caused by screw perforation.
(3) According to the invention, the contact surface of the annular base and the compression ring is provided with the self-locking inclination angle of 4 degrees, so that the locking degree of the flexible film after circumferential pre-tightening can be effectively improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the circularly symmetric circumferential pre-tightening device for the flexible thin film, wherein 1 is an annular base, 2 is a pressing ring, 3 is a fastening bolt, and 4 is the flexible thin film.
Fig. 2 is a partially enlarged view of the pressing ring, wherein 2-1 is a bottom rubber ring, and 2-2 is an inner rubber ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
The invention discloses a circularly symmetric circumferential pre-tightening device for a flexible film, which comprises an annular base 1, a pressing ring 2, a bottom rubber ring 2-1, an inner rubber ring 2-2, a fastening bolt 3 and the flexible film 4; the annular base 1 is used as a main structural member to support the flexible thin film 4 and is connected with the pressure ring 2 through the fastening bolt 3, the pressure ring 2 exerts friction force on the flexible thin film 4 through the embedded inner side rubber ring 2-2 to realize circumferential pre-tightening, and positive pressure is exerted through the embedded bottom side rubber ring 2-1 to firmly lock the flexible thin film 4. The fastening bolts 3 are uniformly distributed on the annular base 1 and the pressing ring 2, the flexible film 4 is clamped in a gap between the pressing ring 2 and the annular base 1, and the edge of the flexible film 4 is positioned between the rubber ring 2-1 at the bottom side of the pressing ring and the fastening bolts 3 and is not in contact with the fastening bolts 3.
The circular symmetry circumferential pre-tightening device for the flexible thin film is characterized in that the corners of a boss of the annular base 1 are rounded, the outward inward inclination angle of the boss is 4 degrees, and the material selection includes but is not limited to aluminum alloy, stainless steel, carbon fiber and the like. The surface of the annular base 1, which is in contact with the flexible film 4, is required to be polished, so that the annular base is free of burrs and bulges and has low surface roughness.
A flexible film circular symmetry circumference preloading device, 2 corner rounding and inboard inside dip angle of clamping ring be 4, material selection includes but not limited to aluminum alloy, stainless steel, carbon fiber etc.. The surface of the compression ring 2 contacted with the flexible film 4 requires polishing, so that the compression ring is free of burrs and bulges and has lower surface roughness.
The flexible film circumferential symmetry pre-tightening device is characterized in that a pair of inner rubber rings 2-2 are embedded in the inner side wall of the compression ring 2, and the material selection includes but is not limited to natural rubber, silica gel, butadiene acrylonitrile rubber and the like. The pipe diameter of the inner side rubber ring 2-2 is selected to be in a reasonable interval, so that the inner side rubber ring 2-2 starts to contact the flexible film 4 at the upper edge of the boss of the annular base 1 and starts to apply friction force, and meanwhile, the lower edge of the pressing ring 2 can contact the annular base 1.
According to the circularly symmetric circumferential pre-tightening device for the flexible thin film, a pair of bottom rubber rings 2-1 is embedded in the bottom side wall of the compression ring 2, and the material selection includes but is not limited to natural rubber, silica gel, butadiene acrylonitrile rubber and the like. The pipe diameter of the rubber ring 2-1 at the bottom side is selected to be in a reasonable interval, so that the lower edge of the pressing ring 2 can contact the annular base 1 and apply enough positive pressure on the flexible film 4.
The flexible film circular symmetry circumferential pre-tightening device is characterized in that the fastening bolts 3 are uniformly distributed on the circumference, and the number of the fastening bolts is not less than 6. Material selection includes, but is not limited to, stainless steel, aluminum alloys, and the like. The screw of the fastening bolt 3 passes through the through hole of the pressure ring 2 to enter the screw hole reserved on the annular base 1, and does not contact the flexible film 4 in the fastening process so as to avoid stress concentration.
According to the circularly symmetric circumferential pre-tightening device for the flexible thin film, the flexible thin film 4 needs to be pre-cut into a circle with a reasonable diameter before pre-tightening, and the diameter is determined by the method that after the flexible thin film 4 is pressed down and clamped between the pressing ring 2 and the annular base 1, the outer edge of the flexible thin film is located between the bottom side rubber ring 2-1 and the fastening bolt 3. Material choices include, but are not limited to, resins, plexiglass, silica gel, polyurethane, polyimide, and the like.
The working process of the invention is as follows:
firstly, the flexible thin film 4 is cut into a circular thin film with the diameter slightly smaller than the enveloping size of the fastening bolts 3 and is flatly paved on the upper surface of the annular base 1, then the compression ring 2 is concentrically and parallelly pressed down to enable the flexible thin film 4 to be circumferentially pre-tightened, and finally the fastening bolts 3 are completely and uniformly screwed down to lock the flexible thin film 4.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110377982.6A CN113103160B (en) | 2021-04-08 | 2021-04-08 | Circular symmetry circumferential pre-tightening device for flexible thin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110377982.6A CN113103160B (en) | 2021-04-08 | 2021-04-08 | Circular symmetry circumferential pre-tightening device for flexible thin film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113103160A true CN113103160A (en) | 2021-07-13 |
| CN113103160B CN113103160B (en) | 2023-03-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110377982.6A Active CN113103160B (en) | 2021-04-08 | 2021-04-08 | Circular symmetry circumferential pre-tightening device for flexible thin film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113103160B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264062A (en) * | 2022-07-01 | 2022-11-01 | 天津航天机电设备研究所 | A kind of airtight connection structure of flexible film and metal member |
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| CN113103160B (en) | 2023-03-31 |
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