CN113814642A - Semiconductor power module welding table - Google Patents
Semiconductor power module welding table Download PDFInfo
- Publication number
- CN113814642A CN113814642A CN202111006460.1A CN202111006460A CN113814642A CN 113814642 A CN113814642 A CN 113814642A CN 202111006460 A CN202111006460 A CN 202111006460A CN 113814642 A CN113814642 A CN 113814642A
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- plate
- power module
- semiconductor power
- front side
- feeding
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- 238000003466 welding Methods 0.000 title claims abstract description 35
- 239000004065 semiconductor Substances 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 19
- 238000005476 soldering Methods 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007769 metal material Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses a semiconductor power module welding table which comprises a feeding mechanism and a mounting mechanism, wherein the feeding mechanism is used for feeding welding materials, the mounting mechanism is used for mounting workpieces, the feeding mechanism comprises a vertical plate, a rotating roller and a transmission belt, the rotating roller is rotatably mounted on the front side of the vertical plate, the transmission belt is arranged on the rotating roller, a mounting block is detachably and fixedly mounted on the outer side of the transmission belt, a square slot is formed in the front side of the mounting block, two feeding plates are welded on the front side of the vertical plate, a circular slide way is arranged above the square slot, a pressing plate is slidably mounted in the slide way, and a slide column is arranged on the pressing plate. The welding material automatic welding machine is simple in structure, reasonable in design and low in production cost, welding materials can be automatically placed at positions needing welding, manual holding is not needed, labor is saved, safety is improved, workpieces can be welded in multiple angles, adjustment is convenient, and practicability is high.
Description
Technical Field
The invention relates to the technical field of semiconductors, in particular to a welding table for a semiconductor power module.
Background
The power semiconductor device is mainly a power metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor and a power integrated circuit. The devices or integrated circuits can work under very high frequency, and the circuits can save more energy and materials when working under high frequency, thereby greatly reducing the volume and the weight of equipment. In particular, the monolithic on-chip power system with high integration level can integrate the sensing device and circuit, the signal processing circuit, the interface circuit, the power device and the circuit on a silicon chip, so that the system has the intelligent functions of precisely adjusting output according to the load requirement and self-protecting according to the conditions of overheating, overvoltage, overcurrent and the like.
Semiconductor power module need be in the same place some sheet metal material welding in the course of working, and present welding set all needs the workman to install the back with the work piece, and handheld sheet metal material welds, and on the one hand, fixing device is inconvenient to be adjusted, need dismantle the work piece repeatedly, and on the other hand handheld sheet metal material wastes time and energy, still leads to the fact the damage to the workman easily.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a bonding stage for a semiconductor power module.
The invention realizes the purpose through the following technical scheme:
a semiconductor power module welding table comprises a feeding mechanism for feeding welding materials and an installation mechanism for installing workpieces, wherein the feeding mechanism comprises a vertical plate, a rotating roller and a transmission belt, the rotating roller is rotatably installed on the front side of the vertical plate, the transmission belt is arranged on the rotating roller, an installation block is detachably and fixedly installed on the outer side of the transmission belt, a square slot is formed in the front side of the installation block, two feeding plates are welded on the front side of the vertical plate, a circular slide way is arranged above the square slot, a pressing plate is slidably installed in the slide way, a slide column is arranged on the pressing plate, a fixing cylinder is arranged on the outer side of the slide column and positioned on the upper end face of the installation block, a top plate is welded on the upper end face of the slide column, a position sensor is installed on the upper end face of the top plate, springs are arranged on the front side and the rear side of the lower end face of the top plate, electromagnets are detachably and fixedly installed on the left side and the right side of the lower end face of the top plate, magnet is arranged below the electromagnet on the upper end face of the mounting block, and a material pushing assembly is arranged on the front side of the transmission belt.
As a further scheme of the invention, the mounting mechanism comprises a slide rail, a slide block and a second electric telescopic rod, the slide block is slidably mounted on the slide rail, the front side of the slide block is detachably and fixedly connected with a telescopic part of the second electric telescopic rod, the upper end surface of the slide block is connected with the bottom of the third electric telescopic rod, a mounting frame is arranged at the upper end of the telescopic part of the third electric telescopic rod, a motor is mounted at the inner side of the mounting frame, a fixed table is rotatably mounted on the upper end surface of the mounting frame, side plates are arranged at the edges of two sides of the upper end surface of the fixed table, threaded rotating rods are connected onto the side plates through threads, and a clamping plate is mounted at one end of each threaded rotating rod, which is positioned at the inner side of each of the two side plates.
As a further scheme of the invention, the material pushing assembly comprises a bearing plate, a push plate and a first electric telescopic rod, wherein a rectangular feeding groove is formed in the upper end surface of the bearing plate, the push plate is slidably mounted in the feeding groove, and the front side of the push plate is detachably and fixedly connected with the telescopic part of the first electric telescopic rod.
As a further scheme of the invention, the vertical plate and the left side and the right side of the rotating roller are respectively provided with one rotating roller, and the rotating roller on one side is driven by a servo motor.
As a further scheme of the invention, at least 20 mounting blocks are uniformly mounted on the outer side of the transmission belt, and the transmission belt is made of alloy, so that the welding efficiency can be greatly improved, and the transmission belt is suitable for batch production.
As a further scheme of the invention, the feeding plate is splayed, the top plate is arranged in a cross shape, and the sliding column is connected with the fixed cylinder in a sliding manner, so that the feeding plate can adjust welding materials and conveniently enter a square slot formed in the front side of the mounting block.
As a further scheme of the invention, the motor is connected with the fixed station through a coupler, and the two threaded rotating rods on the upper end surface of the fixed station are arranged in a mirror symmetry mode.
As a further scheme of the invention, the clamping plate is rotatably arranged at one end of the threaded rotating rod, and the rubber pad is bonded on the clamping plate, so that the workpiece can be effectively protected.
As a further scheme of the invention, the bottom of the rectangular feeding groove on the bearing plate and the bottom of the square slot arranged on the front side of the mounting block are in the same horizontal position, so that the feeding treatment of welding materials can be ensured.
Compared with the prior art, the invention has the beneficial effects that:
1. welding materials are placed in a feeding groove in a bearing plate, an electric telescopic rod drives a push plate to push the welding materials into a slot in an installation block, then an electromagnet is electrified and adsorbed on a magnet, a top plate compresses a spring, a sliding column drives a pressing plate to descend to press the welding materials, a rotating roller drives a transmission belt to rotate, a position sensor can accurately detect the position of the installation block, when the position sensor is conveyed to the position to be welded, the welding materials can be automatically placed at the position to be welded, manual holding is not needed, manpower is saved, and safety is improved;
2. electric telescopic handle No. three can be according to the size of work piece highly adjusting the fixed station, and the motor can drive the fixed station and rotate moreover, conveniently carries out multi-angle welding to the work piece, conveniently adjusts simultaneously, and the practicality is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of a semiconductor power module soldering station in accordance with the present invention;
FIG. 2 is a front view of a semiconductor power module soldering station according to the present invention;
FIG. 3 is a left side view of a semiconductor power module soldering station in accordance with the present invention;
FIG. 4 is a schematic view of a mounting block of a semiconductor power module solder station according to the present invention;
fig. 5 is a schematic view of the internal structure of a mounting block of a semiconductor power module soldering station according to the present invention.
The reference numerals are explained below:
1. a feeding mechanism; 2. an installation mechanism; 101. a vertical plate; 102. rotating the roller; 103. a transmission belt; 104. mounting blocks; 105. a feeding plate; 106. pressing a plate; 107. a traveler; 108. a fixed cylinder; 109. a top plate; 110. a position sensor; 111. a spring; 112. an electromagnet; 113. a magnet; 114. a carrier plate; 115. pushing the plate; 116. a first electric telescopic rod; 201. a slide rail; 202. a slider; 203. a second electric telescopic rod; 204. a third electric telescopic rod; 205. a mounting frame; 206. a motor; 207. a fixed table; 208. a side plate; 209. a threaded rotating rod; 210. and (4) clamping the plate.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be further explained with reference to the drawings.
Examples
As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the present invention provides a technical solution: a semiconductor power module welding table comprises a feeding mechanism 1 for feeding welding materials and an installation mechanism 2 for installing workpieces, wherein the feeding mechanism 1 comprises an upright plate 101, a rotating roller 102 and a transmission belt 103, the front side of the upright plate 101 is rotatably provided with the rotating roller 102, the rotating roller 102 is provided with the transmission belt 103, the outer side of the transmission belt 103 is detachably and fixedly provided with an installation block 104, the front side of the installation block 104 is provided with a square slot, the front side of the upright plate 101 is welded with two feeding plates 105, a round slideway is arranged above the square slot, a pressing plate 106 is slidably arranged in the slideway, a sliding column 107 is arranged on the pressing plate 106, the outer side of the sliding column 107 and the upper end surface of the installation block 104 are provided with a fixed cylinder 108, the upper end of the sliding column 107 is welded with a top plate 109, the upper end surface of the top plate 109 is provided with a position sensor 110, the front side and the rear side of the lower end surface of the top plate 109 are both provided with springs 111, the left side and the right side of the lower end surface of the top plate 109 can be detachably and fixedly provided with electromagnets 112, a magnet 113 is arranged on the upper end surface of the mounting block 104 below the electromagnet 112, and a material pushing component is arranged on the front side of the transmission belt 103.
On the basis of the above-described embodiment: the mounting mechanism 2 comprises a sliding rail 201, a sliding block 202 and a second electric telescopic rod 203, the sliding block 202 is mounted on the sliding rail 201 in a sliding mode, the front side of the sliding block 202 is detachably and fixedly connected with a telescopic part of the second electric telescopic rod 203, the upper end face of the sliding block 202 is connected with the bottom of the third electric telescopic rod 204, an installation frame 205 is arranged at the upper end of the telescopic part of the third electric telescopic rod 204, a motor 206 is mounted on the inner side of the installation frame 205, a fixed table 207 is rotatably mounted on the upper end face of the installation frame 205, side plates 208 are arranged at the edges of two sides of the upper end face of the fixed table 207, threaded rotating rods 209 are connected onto the side plates 208 through threads, and clamping plates 210 are mounted at one ends, located on the inner sides of the two side plates 208, of the threaded rotating rods 209; the material pushing assembly comprises a bearing plate 114, a push plate 115 and a first electric telescopic rod 116, wherein a rectangular feeding groove is formed in the upper end face of the bearing plate 114, the push plate 115 is slidably mounted in the feeding groove, and the front side of the push plate 115 is detachably and fixedly connected with the telescopic part of the first electric telescopic rod 116; the vertical plate 101 and the rotary roller 102 are respectively provided with one on the left and right sides, and the rotary roller 102 on one side is driven by a servo motor; at least 20 mounting blocks 104 are uniformly arranged on the outer side of the transmission belt 103, and the transmission belt 103 is made of alloy, so that the welding efficiency can be greatly improved, and the device is suitable for batch production; the feeding plate 105 is splayed, the top plate 109 is arranged in a cross shape, and the sliding column 107 is connected with the fixed cylinder 108 in a sliding manner, so that welding materials can be adjusted by the feeding plate 105 and can conveniently enter a square slot formed in the front side of the mounting block 104; the motor 206 is connected with the fixed platform 207 through a coupling, and two threaded rotating rods 209 on the upper end surface of the fixed platform 207 are arranged in a mirror symmetry manner; the clamping plate 210 is rotatably arranged at one end of the threaded rotating rod 209, and a rubber pad is bonded on the clamping plate 210, so that the workpiece can be effectively protected; the bottom of the rectangular feeding trough on the bearing plate 114 and the bottom of the square slot formed on the front side of the mounting block 104 are at the same horizontal position, so that the feeding processing of the welding materials can be ensured.
The working principle is as follows: firstly, a workpiece is arranged on the upper end surface of a fixed table 207, a threaded rotating rod 209 is rotated to clamp clamping plates 210 on two sides, then a welding material is placed in a feeding groove on a bearing plate 114, a first electric telescopic rod 116 drives a push plate 115 to push the welding material into a slot on a mounting block 104, then an electromagnet 112 is electrified and adsorbed on a magnet 113, a spring 111 is compressed by a top plate 109, a sliding column 107 drives a pressing plate 106 to descend to press the welding material, a rotating roller 102 drives a transmission belt 103 to rotate to transmit the welding material, a position sensor 110 can accurately detect the position of the mounting block 104, when the mounting block is placed at a position needing welding, the electromagnet 112 is powered off, the spring 111 recovers elasticity, the sliding column 107 drives the pressing plate 106 to ascend, then a second electric telescopic rod 203 drives a sliding block 202 to move backwards along a sliding rail 201, so that the fixed table 207 drives the workpiece to be just under the welding material, and both contact, then weld, and No. three electric telescopic handle 204 can be adjusted the height of fixed station 207 according to the size of work piece, and motor 206 can drive the fixed station 207 and rotate moreover, conveniently carries out multi-angle welding to the work piece.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (9)
1. A semiconductor power module soldering station, comprising: the welding material feeding device comprises a feeding mechanism (1) for feeding welding materials and an installation mechanism (2) for installing workpieces, wherein the feeding mechanism (1) comprises an upright plate (101), a rotating roller (102) and a transmission belt (103), the rotating roller (102) is rotatably installed on the front side of the upright plate (101), the transmission belt (103) is arranged on the rotating roller (102), an installation block (104) is detachably and fixedly installed on the outer side of the transmission belt (103), a square insertion groove is formed in the front side of the installation block (104), two feeding plates (105) are welded on the front side of the upright plate (101), a circular slide way is arranged above the square insertion groove, a pressing plate (106) is slidably installed in the slide way, a slide column (107) is arranged on the pressing plate (106), a fixed cylinder (108) is arranged on the outer side of the slide column (107) and positioned on the upper end face of the installation block (104), and a top plate (109) is welded on the upper end of the slide column (107), position sensor (110) are installed to roof (109) up end, both sides all are provided with spring (111) around roof (109) lower terminal surface, the equal detachable fixed mounting in the lower terminal surface left and right sides has electro-magnet (112) under roof (109), electro-magnet (112) below position in installation piece (104) up end is provided with magnet (113), drive belt (103) front side is provided with pushes away the material subassembly.
2. A semiconductor power module soldering station according to claim 1, wherein: the mounting mechanism (2) comprises a sliding rail (201), a sliding block (202) and a second electric telescopic rod (203), the sliding block (202) is arranged on the sliding rail (201) in a sliding way, the front side of the sliding block (202) is detachably and fixedly connected with the telescopic part of the second electric telescopic rod (203), the upper end surface of the sliding block (202) is connected with the bottom of a third electric telescopic rod (204), the upper end of the telescopic part of the third electric telescopic rod (204) is provided with a mounting rack (205), a motor (206) is arranged on the inner side of the mounting rack (205), a fixed table (207) is rotatably arranged on the upper end surface of the mounting rack (205), side plates (208) are arranged at the edges of two sides of the upper end surface of the fixed table (207), the thread rotating rod (209) is connected to the side plate (208) through threads, the thread rotating rod (209) is located at two ends of the inner side of the side plate (208) and provided with a clamping plate (210).
3. A semiconductor power module soldering station according to claim 1, wherein: the material pushing assembly comprises a bearing plate (114), a push plate (115) and an electric telescopic rod (116), a rectangular feeding groove is formed in the upper end face of the bearing plate (114), the feeding groove is internally provided with the push plate (115) in a sliding mode, and the front side of the push plate (115) is detachably and fixedly connected with a telescopic part of the electric telescopic rod (116).
4. A semiconductor power module soldering station according to claim 1, wherein: the vertical plate (101) and the rotary roller (102) are respectively provided with one on the left side and the right side, and the rotary roller (102) on one side is driven by a servo motor.
5. A semiconductor power module soldering station according to claim 1, wherein: at least 20 mounting blocks (104) are uniformly mounted on the outer side of the transmission belt (103), and the transmission belt (103) is made of alloy.
6. A semiconductor power module soldering station according to claim 1, wherein: the feed plate (105) is the splayed, just roof (109) are the setting of cross, traveller (107) with a fixed section of thick bamboo (108) sliding connection.
7. A semiconductor power module soldering station according to claim 2, wherein: the motor (206) is connected with the fixed station (207) through a coupler, and the two threaded rotating rods (209) on the upper end face of the fixed station (207) are arranged in a mirror symmetry mode.
8. A semiconductor power module soldering station according to claim 2, wherein: the clamping plate (210) is rotatably arranged at one end of the threaded rotating rod (209), and a rubber pad is bonded on the clamping plate (210).
9. A semiconductor power module soldering station according to claim 1, wherein: the bottom of the rectangular feeding trough on the bearing plate (114) and the bottom of the square slot formed in the front side of the mounting block (104) are in the same horizontal position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111006460.1A CN113814642A (en) | 2021-08-30 | 2021-08-30 | Semiconductor power module welding table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111006460.1A CN113814642A (en) | 2021-08-30 | 2021-08-30 | Semiconductor power module welding table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113814642A true CN113814642A (en) | 2021-12-21 |
Family
ID=78923568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111006460.1A Withdrawn CN113814642A (en) | 2021-08-30 | 2021-08-30 | Semiconductor power module welding table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113814642A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116787036A (en) * | 2023-08-23 | 2023-09-22 | 湖南可道工程有限公司 | Balcony rail welding set that construction was used |
| CN117840651A (en) * | 2024-02-27 | 2024-04-09 | 环贸机器人科技(山东)有限公司 | Production water cutting equipment is with fixed structure welding auxiliary fixtures of being convenient for |
-
2021
- 2021-08-30 CN CN202111006460.1A patent/CN113814642A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116787036A (en) * | 2023-08-23 | 2023-09-22 | 湖南可道工程有限公司 | Balcony rail welding set that construction was used |
| CN116787036B (en) * | 2023-08-23 | 2023-11-14 | 湖南可道工程有限公司 | Balcony rail welding set that construction was used |
| CN117840651A (en) * | 2024-02-27 | 2024-04-09 | 环贸机器人科技(山东)有限公司 | Production water cutting equipment is with fixed structure welding auxiliary fixtures of being convenient for |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211221 |