CN112959105A - Numerical control machining clamp for thin plate - Google Patents
Numerical control machining clamp for thin plate Download PDFInfo
- Publication number
- CN112959105A CN112959105A CN202110184947.2A CN202110184947A CN112959105A CN 112959105 A CN112959105 A CN 112959105A CN 202110184947 A CN202110184947 A CN 202110184947A CN 112959105 A CN112959105 A CN 112959105A
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- Prior art keywords
- connecting rod
- clamping
- numerical control
- translation
- supporting
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- 238000003754 machining Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 230000003028 elevating effect Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 238000000034 method Methods 0.000 abstract 1
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
一种薄板数控加工夹具，属于机械加工技术领域。它提供一种功能多样，能够连续加工薄板，适用范围广的薄板数控加工夹具。该夹具包括工作台、设置在工作台左右两侧用于夹持薄板的多个夹持机构以及用于支撑薄板的多个支撑机构；每个所述夹持机构均安装在升降机构上，所述多个升降机构分别安装对应的平移装置上，所述多个平移装置左右两侧对称安装在工作台上。本发明通过夹持机构和平移装置的配合能够不断夹持平移薄板，实现连续加工作业，通过升降机构能够调节夹具的高度，能够适用不同的加工作业需求和夹持不同规格的薄板。
A thin plate numerical control processing fixture belongs to the technical field of mechanical processing. It provides a versatile thin plate CNC machining fixture that can continuously process thin plates and is suitable for a wide range of applications. The fixture includes a worktable, a plurality of clamping mechanisms arranged on the left and right sides of the worktable for clamping the thin plate, and a plurality of supporting mechanisms for supporting the thin plate; each of the clamping mechanisms is installed on the lifting mechanism, so The plurality of lifting mechanisms are respectively installed on the corresponding translation devices, and the plurality of translation devices are symmetrically installed on the worktable on the left and right sides. Through the cooperation of the clamping mechanism and the translation device, the invention can continuously clamp and translate the thin plate to realize continuous processing operation, and can adjust the height of the clamp through the lifting mechanism, and can be suitable for different processing operation requirements and clamping thin plates of different specifications.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a numerical control machining clamp for a thin plate.
Background
When the sheet metal is processed, the clamp is needed, but the existing processing mode is that the installation positions of the clamp and the processing tool are relatively fixed, so that the processing range of the processing tool is limited, the processing of a single sheet metal can only be carried out, continuous operation cannot be formed, the working efficiency is reduced, and in addition, the existing clamp has a single function and a small application range.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the sheet numerical control machining clamp which has multiple functions, can continuously machine sheets and has wide application range.
The technical scheme adopted by the invention is as follows: a numerical control machining clamp for a thin plate comprises a workbench, a plurality of clamping mechanisms and a plurality of supporting mechanisms, wherein the clamping mechanisms are arranged on the left side and the right side of the workbench and used for clamping the thin plate; every fixture all installs on elevating system, on a plurality of elevating system install the translation device that corresponds respectively, a plurality of translation device left and right sides symmetry are installed on the workstation.
The invention has the beneficial effects that:
the clamping mechanism and the translation device are matched to continuously clamp the translation thin plate, so that continuous machining operation is realized, the working efficiency is improved, the height of the clamp can be adjusted through the lifting mechanism, and the clamping mechanism can be suitable for different machining operation requirements and clamping thin plates with different specifications.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the clamping mechanism of the present invention;
FIG. 3 is a schematic view of the translation device of the present invention;
FIG. 4 is a schematic view of the support mechanism of the present invention;
wherein: 1. a work table; 2. a clamping mechanism; 3. a thin plate; 4. a support mechanism; 5. a lifting mechanism; 6. a translation device; 7. a clamping bar; 8. a first link; 9. a third link; 10. a second link; 11. an incomplete gear; 12. mounting a plate; 13. a connecting rod; 14. a flat bearing; 15. a first bearing; 16. mounting a rod; 17. a lifting motor; 18. a driving gear; 19. a driven gear; 20. a lifting screw; 21. a guide rail; 22. a bump; 23. a table top plate; 24. a translation motor; 25. a slider; 26. fixing the rod; 27. translating the screw rod; 28. a telescopic oil cylinder; 29. a lever; 30. a limiting cylinder; 31. a support bar; 32. a spring; 33. a support member; 34. a stretching plate; 35. a sleeve; 36. a sleeve; 37. a U-shaped frame; 38. a frame opening.
Detailed Description
For better understanding of the objects, structure and function of the invention, reference will now be made in detail to the present invention as illustrated in the accompanying drawings, which are incorporated in and constitute a part of this specification, and to the accompanying drawings, which are incorporated in and constitute a part of this specification.
A numerical control machining clamp for thin plates comprises a workbench 1, a plurality of clamping mechanisms 2 arranged on the left side and the right side of the workbench 1 and used for clamping thin plates 3, and a plurality of supporting mechanisms 4 used for supporting the thin plates 3; every fixture 2 all installs on elevating system 5, adjusts fixture 2's height through elevating system 5, a plurality of elevating system 5 install respectively on the translation device 6 that corresponds, a plurality of translation devices 6 bilateral symmetry are installed on workstation 1. The relative position of the clamping mechanism 2 and the workbench 1 is adjusted by the translation device 6.
As shown in fig. 2, each of the clamping mechanisms 2 includes a mounting plate 12, a clamping motor, and two link mechanisms disposed opposite to each other up and down; each connecting rod mechanism comprises a clamping rod 7, a first connecting rod 8, a second connecting rod 10, a third connecting rod 9 and an incomplete gear 11; 7 level settings of clamping bar, 7 one ends of clamping bar and 8 one end fixed connection of first connecting rod, the 8 other ends of first connecting rod and the coaxial articulated of 10 one ends of second connecting rod, the 10 other ends of second connecting rod and incomplete gear 11 fixed connection, 9 one ends of third connecting rod are articulated with 8 one ends of first connecting rod, and the 9 other ends of third connecting rod rotate with mounting panel 12 through the round pin axle and are connected, incomplete gear 11 meshing of two link mechanism is connected and is rotated and install on mounting panel 12, one of them incomplete gear 11 of centre gripping motor drive rotates.
The working principle of the clamping mechanism 2 is as follows: the clamping motor drives the two incomplete gears 11 to rotate, so as to drive the second connecting rod 10, the first connecting rod 8 and the third connecting rod 9 to move in sequence, the two clamping rods 7 are opened and closed under the action of the first connecting rod 8 and the third connecting rod 9, so that the thin plate 3 can be clamped and opened, the structure aims to move the thin plate 3 on the basis of being capable of clamping the thin plate 3 by adopting each clamping mechanism 2 which is operated in a single body and matched with the translation device 6,
for example, a part of the clamping mechanisms 2 clamps the thin plate 3, the other part of the thin plate 3 is loosened, the clamping mechanisms 2 for clamping the thin plate 3 can move forwards along the workbench 1 under the action of the translation device 6, after the movement is completed, the part of the clamping mechanisms 2 for clamping the thin plate 3 originally releases the thin plate 3, the translation device 6 pushes the thin plate 3 to return to the initial position, the part of the clamping mechanisms 2 for releasing the thin plate 3 originally clamps the thin plate 3, the translation device 6 pushes the part of the clamping mechanisms 2 to move forwards, and the circulation is carried out in sequence, so that the thin plate 3 is moved in such a way, the limitation of the translation range of the translation device 6 can be avoided, and the continuous operation of processing a plurality of.
As shown in fig. 2, each of the lifting mechanisms 5 includes a connecting rod 13, a plane bearing 14, a first bearing 15, a mounting rod 16, a lifting motor 17, a driving gear 18, a driven gear 19, and a lifting screw 20; connecting rod 13 level sets up, connecting rod 13 one end and the mounting panel 12 fixed connection who corresponds fixture 2, vertical setting be connected through flat bearing 14 rotation between 20 upper ends of lifting screw and the connecting rod 13 other end, the cover is equipped with first bearing 15 and installs on translation device 6's slider 25 through first bearing 15 on the lifting screw 20, 19 fixed suits of driven gear are on lifting screw 20 lower extreme, the fixed suit of driving gear 18 is on lifting motor 17's output shaft, lifting motor 17 fixes on first bearing 15 through installation pole 16, and the lifting motor 17 of being convenient for can remove along with lifting screw 20 together.
The working principle of the lifting mechanism 5 is as follows: the lifting motor 17 drives the lifting screw 20 to move up and down through the driving gear 18 and the driven gear 19, and the lifting screw 20 drives the clamping mechanism 2 to move up and down through the connecting rod 13.
As shown in fig. 1, the left and right sides of the worktable 1 are respectively provided with a guide rail 21 along the length direction thereof, the upper surfaces of the two guide rails 21 are respectively provided with a sliding chute, the lower end of each lifting screw 20 is movably inserted into the sliding chute, and a bump 22 is arranged at the position and is erected on the sliding chute. The function of the cam 22 and the guide rail 21 is to give a supporting force to the lifting mechanism 5.
As shown in fig. 3, each of the translation devices 6 includes a translation motor 24, a translation screw 27, at least one slider 25 and at least one fixing rod 26; the workbench 1 is provided with a table board 23, mounting grooves are formed in the left end and the right end of the table board 23 along the length direction of the table board, the translation motor 24 is fixed at one end in the mounting grooves, the translation screw 27 is arranged in the mounting grooves along the length direction of the mounting grooves and fixed on an output shaft of the translation screw 27, at least one sliding block 25 is arranged on the translation screw 27, and the upper end of the sliding block 25 is connected with the corresponding first bearing 15 through a fixing rod 26. The fixing bar 26 is disposed above and across the mounting groove.
The working principle of the translation device 6 is as follows: the translation motor 24 drives the translation screw 27 to rotate so as to reciprocate the slide block 25 thereon, thereby driving the clamping mechanism 2 to reciprocate.
At least two translation screws 27 are arranged in each mounting groove.
All the sliding blocks 25 on all the translation screw rods 27 in the same mounting groove are sequentially arranged in a staggered manner.
As shown in fig. 4, each of the supporting mechanisms 4 includes a telescopic oil cylinder 28, a lever 29, a sleeve 35, a sleeve 36, three limiting cylinders 30, three supporting rods 31 and two extending plates 34; the upper surface of deck plate 23 is fixed with U type frame 37 along its length direction to frame mouth 38 has been seted up on U type frame 37 left side or right side, lever 29 passes through sleeve pipe 36 and rotates and install on U type frame 37, flexible hydro-cylinder 28 sets up in frame mouth 38 below and installs on workstation 1, and flexible outer end and lever 29 lower extreme of flexible hydro-cylinder 28 are articulated, slide and insert in sleeve 35 in the lever 29 upper end, the sleeve 35 left and right sides all is equipped with extension board 34, three bracing piece 31 is articulated with sleeve 35, two extension boards 34 respectively, slide and insert in spacing section of thick bamboo 30 three bracing piece 31 lower extreme, and three bracing piece 31 upper end is used for supporting sheet 3.
The working principle of the supporting mechanism 4 is as follows: the telescopic oil cylinder 28 extends and retracts to drive the upper end of the lever 29 to move up and down, so that the support rod 31 is driven to move up and down, and the effect of supporting the thin plates 3 with different heights is realized.
The purpose of the sleeve 35 and the limiting cylinder 30 is to ensure the up-and-down movement of the supporting rod 31 and avoid the movement in other directions.
Each support mechanism 4 further includes three support members 33, and one support member 33 is mounted on the upper end of each support rod 31.
Every all be equipped with spring 32 between support piece 33 and the bracing piece 31, and the bracing piece 31 upper end all includes the footpath setting, and spacing chamber has been seted up to bracing piece 31 upper end, spring 32 and support piece 33 lower extreme all set up at spacing intracavity.
The purpose of the spring 32 is to enable the present machining jig to clamp the thin plate 3 having an uneven thickness.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a sheet metal numerical control adds clamping apparatus which characterized in that: comprises a workbench (1), a plurality of clamping mechanisms (2) arranged at the left side and the right side of the workbench (1) and used for clamping a thin plate (3), and a plurality of supporting mechanisms (4) used for supporting the thin plate (3); every fixture (2) all installs on elevating system (5), and is a plurality of elevating system (5) installs respectively on corresponding translation device (6), and is a plurality of translation device (6) left and right sides symmetry is installed on workstation (1).
2. The numerical control sheet machining clamp of claim 1, characterized in that: each clamping mechanism (2) comprises an installation plate (12), a clamping motor and two link mechanisms which are oppositely arranged up and down; each connecting rod mechanism comprises a clamping rod (7), a first connecting rod (8), a second connecting rod (10), a third connecting rod (9) and an incomplete gear (11); clamping bar (7) level sets up, clamping bar (7) one end and first connecting rod (8) one end fixed connection, and first connecting rod (8) other end and the coaxial articulated of second connecting rod (10) one end, second connecting rod (10) other end and incomplete gear (11) fixed connection, third connecting rod (9) one end is articulated with first connecting rod (8) one end, and the third connecting rod (9) other end rotates through round pin axle and mounting panel (12) to be connected, incomplete gear (11) meshing of two link mechanism is connected, one of them incomplete gear (11) of centre gripping motor drive rotates.
3. The numerical control sheet machining clamp of claim 2, characterized in that: each lifting mechanism (5) comprises a connecting rod (13), a plane bearing (14), a first bearing (15), a mounting rod (16), a lifting motor (17), a driving gear (18), a driven gear (19) and a lifting screw (20); connecting rod (13) level sets up, connecting rod (13) one end and mounting panel (12) fixed connection who corresponds fixture (2), vertical setting be connected through flat bearing (14) rotation between lifting screw (20) upper end and connecting rod (13) the other end, lifting screw (20) are gone up the cover and are equipped with first bearing (15) and install on slider (25) of translation device (6) through first bearing (15), the fixed suit of driven gear (19) is on lifting screw (20) lower extreme, the fixed suit of driving gear (18) is on the output shaft of elevator motor (17), elevator motor (17) are fixed on first bearing (15) through installation pole (16).
4. The numerical control sheet machining clamp of claim 3, characterized in that: the left side and the right side of the workbench (1) are respectively provided with guide rails (21) along the length direction of the workbench, the guide rails (21) are respectively provided with a sliding groove on the upper surface, each of the lower ends of the lifting screws (20) is movably inserted into the sliding groove, and a bump (22) is arranged on the sliding groove.
5. The numerical control sheet machining clamp of claim 3, characterized in that: each translation device (6) comprises a translation motor (24), a translation screw (27), at least one sliding block (25) and at least one fixing rod (26); workstation (1) is equipped with deck plate (23), the mounting groove has been seted up along its length direction in both ends about deck plate (23), translation motor (24) are fixed in the mounting groove one end, translation screw rod (27) set up in the mounting groove and fix on the output shaft of translation screw rod (27) along mounting groove length direction, are equipped with at least one slider (25) on translation screw rod (27), and slider (25) upper end is connected with first bearing (15) that correspond through dead lever (26).
6. The numerical control sheet machining clamp of claim 5, characterized in that: at least two translation screws (27) are arranged in each mounting groove.
7. The numerical control sheet machining clamp of claim 6, characterized in that: all the sliding blocks (25) on all the translation screw rods (27) in the same mounting groove are sequentially arranged in a front-back staggered manner.
8. The numerical control sheet machining clamp of claim 5, characterized in that: each supporting mechanism (4) comprises a telescopic oil cylinder (28), a lever (29), a sleeve (35), a sleeve (36), three limiting cylinders (30), three supporting rods (31) and two extending plates (34); deck plate (23) upper surface is fixed with U type frame (37) along its length direction to frame mouth (38) have been seted up on U type frame (37) left side or right side, lever (29) are rotated through sleeve pipe (36) and are installed on U type frame (37), flexible hydro-cylinder (28) set up in frame mouth (38) below and install on workstation (1), and the flexible outer end and lever (29) lower extreme of flexible hydro-cylinder (28) are articulated, in lever (29) upper end sliding insertion sleeve (35), the sleeve (35) left and right sides all is equipped with extension board (34), three bracing piece (31) are articulated with sleeve (35), two extension boards (34) respectively, in three bracing piece (31) lower extreme sliding insertion spacing section of thick bamboo (30), three bracing piece (31) upper end is used for supporting sheet metal (3).
9. The numerical control sheet machining clamp of claim 8, characterized in that: each supporting mechanism (4) also comprises three supporting pieces (33), and one supporting piece (33) is installed at the upper end of each supporting rod (31).
10. The numerical control sheet machining clamp of claim 9, characterized in that: every all be equipped with spring (32) between support piece (33) and bracing piece (31), and bracing piece (31) upper end all includes the footpath setting, and spacing chamber has been seted up to bracing piece (31) upper end, spring (32) and support piece (33) lower extreme all set up at spacing intracavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110184947.2A CN112959105A (en) | 2021-02-10 | 2021-02-10 | Numerical control machining clamp for thin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110184947.2A CN112959105A (en) | 2021-02-10 | 2021-02-10 | Numerical control machining clamp for thin plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112959105A true CN112959105A (en) | 2021-06-15 |
Family
ID=76284870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110184947.2A Withdrawn CN112959105A (en) | 2021-02-10 | 2021-02-10 | Numerical control machining clamp for thin plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112959105A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116765859A (en) * | 2023-08-26 | 2023-09-19 | 山西宝航重工有限公司 | Automatic displacement device for processing hinge beam of hexahedral press |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB184717A (en) * | 1921-09-24 | 1922-08-24 | Joshua Alfred Edward Artiss El | Improvements in and appertaining to mud guards for motor and other vehicles |
| CN208439442U (en) * | 2018-07-17 | 2019-01-29 | 中国人民解放军海军航空大学青岛校区 | A lift platform for aircraft maintenance |
| CN110103053A (en) * | 2019-06-19 | 2019-08-09 | 蒋艳红 | A kind of mobile clamping workbench for round steel processing |
| CN110817398A (en) * | 2018-08-10 | 2020-02-21 | 大同市新荣霞贸易有限公司 | Automatic section bar grabbing and transferring device |
| CN110842866A (en) * | 2019-11-26 | 2020-02-28 | 四川大学 | A special workbench adapting to the size of thin plates |
| CN111056306A (en) * | 2019-12-06 | 2020-04-24 | 田祥 | Automatic feeding and lifting machine for manufacturing and processing galvanized steel sheet |
| CN211219634U (en) * | 2019-11-05 | 2020-08-11 | 湖北优尔特轴承科技有限公司 | Positioning device for processing inner ring and outer ring of bearing |
-
2021
- 2021-02-10 CN CN202110184947.2A patent/CN112959105A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB184717A (en) * | 1921-09-24 | 1922-08-24 | Joshua Alfred Edward Artiss El | Improvements in and appertaining to mud guards for motor and other vehicles |
| CN208439442U (en) * | 2018-07-17 | 2019-01-29 | 中国人民解放军海军航空大学青岛校区 | A lift platform for aircraft maintenance |
| CN110817398A (en) * | 2018-08-10 | 2020-02-21 | 大同市新荣霞贸易有限公司 | Automatic section bar grabbing and transferring device |
| CN110103053A (en) * | 2019-06-19 | 2019-08-09 | 蒋艳红 | A kind of mobile clamping workbench for round steel processing |
| CN211219634U (en) * | 2019-11-05 | 2020-08-11 | 湖北优尔特轴承科技有限公司 | Positioning device for processing inner ring and outer ring of bearing |
| CN110842866A (en) * | 2019-11-26 | 2020-02-28 | 四川大学 | A special workbench adapting to the size of thin plates |
| CN111056306A (en) * | 2019-12-06 | 2020-04-24 | 田祥 | Automatic feeding and lifting machine for manufacturing and processing galvanized steel sheet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116765859A (en) * | 2023-08-26 | 2023-09-19 | 山西宝航重工有限公司 | Automatic displacement device for processing hinge beam of hexahedral press |
| CN116765859B (en) * | 2023-08-26 | 2023-11-10 | 山西宝航重工有限公司 | Automatic displacement device for processing hinge beam of hexahedral press |
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Application publication date: 20210615 |
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