CN111098015A - Power adapter shell ultrasonic wave multistation welding machine - Google Patents
Power adapter shell ultrasonic wave multistation welding machine Download PDFInfo
- Publication number
- CN111098015A CN111098015A CN202010047067.6A CN202010047067A CN111098015A CN 111098015 A CN111098015 A CN 111098015A CN 202010047067 A CN202010047067 A CN 202010047067A CN 111098015 A CN111098015 A CN 111098015A
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- Prior art keywords
- wall
- plate
- power adapter
- sliding
- ultrasonic
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- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
Abstract
The invention discloses an ultrasonic multi-station welding machine for a power adapter shell, and belongs to the field of welding of power adapters. An ultrasonic multi-station welding machine for a power adapter shell comprises a base, wherein the outer wall of the top of the base is rotatably connected with a rotating shaft, the outer wall of the top of the rotating shaft is rotatably connected with a turntable, and eight station chucks are arranged on the turntable; the bottom of the top plate is connected with a fixed disc, and the bottom of the fixed disc is connected with an ultrasonic welding head; the outer wall of the supporting plate is connected with a rotating plate through a first connecting plate, and the outer wall of the fixed disc is provided with a fixed plate matched with the rotating plate; the outer wall of the supporting plate is also connected with a sliding rod matched with the rotating plate in a sliding mode, and the sliding rod drives the rotating shaft to rotate through a transmission piece; the invention has convenient operation, does not need frequent replacement and welding of the power adapter, reduces the labor intensity, improves the working efficiency and can be suitable for large-scale production.
Description
Technical Field
The invention relates to the technical field of welding of power adapters, in particular to an ultrasonic multi-station welding machine for a shell of a power adapter.
Background
The power adapter is a power supply conversion device of small portable electronic equipment and electronic appliances, generally comprises components such as a shell, a transformer, an inductor, a capacitor, a control IC (integrated circuit), a PCB (printed circuit board) and the like, and the working principle of the power adapter is that alternating current input is converted into direct current output; the connection mode can be divided into a wall-inserting type and a desktop type; the intelligent anti-theft device is widely matched with security cameras, set top boxes, routers, light bars, massage instruments and other devices.
The ultrasonic welding machine can be divided into an automatic welding machine, a semi-automatic ultrasonic welding machine and a manual welding machine according to the automation level, and for modern enterprises, the higher the automation level is, the more favorable the production line of the enterprises is, so that the use of the automatic welding machine is a future trend of the enterprises; at present, the power adapter is usually operated one by one when ultrasonic welding operation is carried out, the power adapter needing to be welded needs to be frequently replaced, the operation is troublesome, the labor intensity is high, the working efficiency is low, and the large-scale production cannot be met.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an ultrasonic multi-station welding machine for a power adapter shell.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ultrasonic multi-station welding machine for a power adapter shell comprises a base, wherein the outer wall of the top of the base is rotatably connected with a rotating shaft, the outer wall of the top of the rotating shaft is rotatably connected with a turntable, and eight station chucks are arranged on the turntable;
the outer wall of the top of the base is also connected with a supporting plate, the outer wall of the top of the supporting plate is connected with a top plate, the bottom of the top plate is connected with a fixed disc, and the bottom of the fixed disc is connected with an ultrasonic welding head;
the outer wall of the supporting plate is connected with a rotating plate through a first connecting plate, and the outer wall of the fixed disc is provided with a fixed plate matched with the rotating plate;
the outer wall of the supporting plate is further connected with a sliding rod matched with the rotating plate in a sliding mode, and the sliding rod drives the rotating shaft to rotate through the transmission piece.
Preferably, the driving medium mainly includes push rod, connecting rod, slurcam and disc, be connected with the sloping block between backup pad and the base, sliding connection has the slider on the sloping block, push rod fixed connection is at the outer wall of slider, the bottom of slide bar is equipped with the pulley with slider matched with, the both ends of connecting rod rotate with push rod and slurcam respectively and link to each other, the slurcam cooperatees with the disc.
Preferably, a cavity is arranged in the pushing plate, a second clamping block is rotatably connected in the cavity, and a first clamping block meshed with the disc is connected to the outer wall of the disc.
Preferably, the outer wall of the pushing plate is further provided with a positioning block abutting against the second clamping block, and a third spring is further connected between the second clamping block and the inner wall of the cavity.
Preferably, the outer wall of the inclined block is fixedly connected with a fixing block, the push rod is connected in the fixing block in a sliding mode, the outer wall of the push rod is further sleeved with a second spring, and the second spring is connected between the sliding block and the fixing block.
Preferably, the outer wall of backup pad is equipped with solid fixed ring, slide bar sliding connection is in solid fixed ring, the outer wall of backup pad still is connected with first fixed column through the second connecting plate, the outer wall of slide bar is equipped with first spout, first fixed column sliding connection is in first spout, the outer wall of slide bar still is equipped with the baffle, the bottom of baffle is connected with first spring, the bottom of first spring offsets with solid fixed ring's outer wall.
Preferably, a second fixing column is fixedly connected in the base, a second sliding groove is formed in the connecting rod, and the second fixing column is connected in the second sliding groove in a sliding mode.
Preferably, the supporting plate is provided with a through hole, the rotating plate is rotatably connected in the through hole, and an elastic part is connected between the outer wall of the top of the rotating plate and the inner wall of the through hole.
Preferably, the top outer wall of roof is connected with reciprocating cylinder, the output at reciprocating cylinder is connected to the fixed disk, the outer wall of fixed disk still is equipped with eight mounting holes, the ultrasonic bonding tool is connected in the mounting hole.
Compared with the prior art, the invention provides an ultrasonic multi-station welding machine for a power adapter shell, which has the following beneficial effects:
1. the ultrasonic multi-station welding machine for the power adapter shell comprises a power adapter, wherein the power adapter which needs to be subjected to ultrasonic welding is installed on eight station chucks on a rotary disc, then ultrasonic welding heads are installed in installation holes, different numbers can be installed according to use requirements, then a reciprocating cylinder is started, so that the reciprocating cylinder drives the ultrasonic welding heads to move downwards through a fixed disc, the power adapter is welded, after welding is completed, the fixed disc can move upwards, so that a fixed plate is driven to be matched with a rotating plate, the rotating plate is driven to rotate on the outer wall of a first connecting plate, a sliding rod is pushed to move, then a rotating shaft is driven to rotate for a certain angle through a transmission piece, so that the rotary disc is automatically switched to the next power adapter, then the reciprocating cylinder reciprocates and operates again, and the power adapter does not, the labor intensity is reduced, and the working efficiency is improved.
2. This power adapter shell ultrasonic wave multistation welding machine, the concrete working process of driving medium is: the slide bar moves downwards, thereby driving the pulley at the bottom to move on the sloping block and simultaneously pushing the sliding block to move, because the sloping block is provided with an inclined plane, the first fixing column and the first sliding chute can facilitate the slide bar to move and can enable the slide bar to incline to a certain degree, thereby facilitating the sliding block to move, the sliding block can drive the push rod to move so as to push the connecting rod to move, the second fixing column and the second sliding chute can perform certain positioning on the connecting rod so as to facilitate the connecting rod to push the push plate to move, then the second clamping block on the push plate can push the first clamping block on the disc, the disc can rotate by a certain angle under the action of the positioning block, the next power adapter on the rotary disc is matched with the ultrasonic welding head, when the fixed plate on the fixed disc continues to move upwards to be matched and separated with the rotating plate, the first spring and the second spring can enable the slide bar, the sliding block, make things convenient for repetitive operation, the connecting rod can drive the slurcam and remove simultaneously, then the second fixture block on the slurcam then can be at the cavity internal rotation to make it can not promote the disc and rotate, make its convenient the reseing simultaneously, can used repeatedly.
The parts which are not involved in the device are the same as or can be realized by adopting the prior art, the invention has convenient operation, does not need to frequently replace the welding power adapter, reduces the labor intensity, improves the working efficiency and can be suitable for large-scale production.
Drawings
FIG. 1 is a schematic structural diagram of an integral ultrasonic multi-station welding machine for a power adapter shell, which is provided by the invention;
FIG. 2 is a schematic structural view of a portion of an ultrasonic multi-station welding machine for a power adapter housing according to the present invention;
FIG. 3 is a schematic structural diagram of a fixing disc of an ultrasonic multi-station welding machine for a power adapter shell according to the present invention;
FIG. 4 is a schematic structural diagram of the first fixture block and the second fixture block of the ultrasonic multi-station welding machine for the power adapter shell provided by the invention in a matched manner;
FIG. 5 is a schematic structural view of a portion A of the ultrasonic multi-station welding machine for the shell of the power adapter, which is provided by the invention, in FIG. 1;
fig. 6 is a schematic structural diagram of a part B in fig. 2 of an ultrasonic multi-station welding machine for a power adapter housing according to the present invention.
In the figure: 1. a base; 101. a support plate; 102. a through hole; 103. a top plate; 2. a rotating shaft; 201. a turntable; 202. a disc; 203. a first clamping block; 3. a reciprocating cylinder; 301. fixing the disc; 302. mounting holes; 303. an ultrasonic horn; 4. a rotating plate; 401. an elastic member; 5. a slide bar; 501. a first chute; 502. a baffle plate; 503. a fixing ring; 504. a first spring; 505. a first fixed column; 6. a sloping block; 601. a slider; 602. a push rod; 603. a fixed block; 604. a second spring; 605. a connecting rod; 606. a second fixed column; 607. a second chute; 7. a push plate; 701. a second fixture block; 702. positioning blocks; 703. and a third spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
referring to fig. 1-6, an ultrasonic multi-station welding machine for a power adapter shell comprises a base 1, wherein the outer wall of the top of the base 1 is rotatably connected with a rotating shaft 2, the outer wall of the top of the rotating shaft 2 is rotatably connected with a turntable 201, and eight station chucks are arranged on the turntable 201;
the outer wall of the top of the base 1 is also connected with a supporting plate 101, the outer wall of the top of the supporting plate 101 is connected with a top plate 103, the bottom of the top plate 103 is connected with a fixed disc 301, and the bottom of the fixed disc 301 is connected with an ultrasonic welding head 303;
the outer wall of the supporting plate 101 is connected with a rotating plate 4 through a first connecting plate, and the outer wall of the fixed plate 301 is provided with a fixed plate matched with the rotating plate 4;
the outer wall of the supporting plate 101 is also slidably connected with a slide bar 5 matched with the rotating plate 4, and the slide bar 5 drives the rotating shaft 2 to rotate through a transmission piece.
The transmission part mainly comprises a push rod 602, a connecting rod 605, a push plate 7 and a disc 202, an inclined block 6 is connected between the supporting plate 101 and the base 1, a sliding block 601 is connected on the inclined block 6 in a sliding manner, the push rod 602 is fixedly connected to the outer wall of the sliding block 601, a pulley matched with the sliding block 601 is arranged at the bottom of the sliding rod 5, two ends of the connecting rod 605 are respectively connected with the push rod 602 and the push plate 7 in a rotating manner, and the push plate 7 is matched with the disc 202.
In the invention, power adapters needing ultrasonic welding are firstly installed on eight station chucks on a turntable 201, then ultrasonic welding heads 303 are installed in installation holes 302, different numbers can be installed according to use requirements, then a reciprocating cylinder 3 is started, so that the reciprocating cylinder 3 drives the ultrasonic welding heads 303 to move downwards through a fixed disc 301, thereby welding the power adapters, after welding is completed, the fixed disc 301 moves upwards, thereby driving a fixed plate to be matched with a rotating plate 4, thereby the rotating plate 4 rotates on the outer wall of a first connecting plate, thereby pushing a sliding rod 5 to move, then a transmission piece drives a rotating shaft 2 to rotate for a certain angle, thereby the turntable 201 is automatically converted to the next power adapter, then the reciprocating cylinder 3 reciprocates, operation is carried out again, frequent replacement of the power adapters is not needed, and labor intensity is reduced, the working efficiency is improved.
Example 2:
referring to fig. 1-6, an ultrasonic multi-station welding machine for a power adapter shell comprises a base 1, wherein the outer wall of the top of the base 1 is rotatably connected with a rotating shaft 2, the outer wall of the top of the rotating shaft 2 is rotatably connected with a turntable 201, and eight station chucks are arranged on the turntable 201;
the outer wall of the top of the base 1 is also connected with a supporting plate 101, the outer wall of the top of the supporting plate 101 is connected with a top plate 103, the bottom of the top plate 103 is connected with a fixed disc 301, and the bottom of the fixed disc 301 is connected with an ultrasonic welding head 303;
the outer wall of the supporting plate 101 is connected with a rotating plate 4 through a first connecting plate, and the outer wall of the fixed plate 301 is provided with a fixed plate matched with the rotating plate 4;
the outer wall of the supporting plate 101 is also slidably connected with a slide bar 5 matched with the rotating plate 4, and the slide bar 5 drives the rotating shaft 2 to rotate through a transmission piece.
The transmission part mainly comprises a push rod 602, a connecting rod 605, a push plate 7 and a disc 202, an inclined block 6 is connected between the supporting plate 101 and the base 1, a sliding block 601 is connected on the inclined block 6 in a sliding manner, the push rod 602 is fixedly connected to the outer wall of the sliding block 601, a pulley matched with the sliding block 601 is arranged at the bottom of the sliding rod 5, two ends of the connecting rod 605 are respectively connected with the push rod 602 and the push plate 7 in a rotating manner, and the push plate 7 is matched with the disc 202.
A cavity is arranged in the pushing plate 7, a second fixture block 701 is rotatably connected in the cavity, and a first fixture block 203 meshed with the outer wall of the disc 202 is connected to the outer wall of the cavity.
A positioning block 702 abutting against the second fixture block 701 is further arranged on the outer wall of the pushing plate 7, and a third spring 703 is further connected between the second fixture block 701 and the inner wall of the cavity.
The outer wall of the inclined block 6 is also fixedly connected with a fixing block 603, the push rod 602 is slidably connected in the fixing block 603, the outer wall of the push rod 602 is also sleeved with a second spring 604, and the second spring 604 is connected between the sliding block 601 and the fixing block 603.
The outer wall of supporting plate 101 is equipped with solid fixed ring 503, slide bar 5 sliding connection is in solid fixed ring 503, the outer wall of supporting plate 101 still is connected with first fixed column 505 through the second connecting plate, the outer wall of slide bar 5 is equipped with first spout 501, first fixed column 505 sliding connection is in first spout 501, the outer wall of slide bar 5 still is equipped with baffle 502, the bottom of baffle 502 is connected with first spring 504, the bottom of first spring 504 offsets with solid fixed ring 503's outer wall.
The interior fixedly connected with second fixed column 606 of base 1 is equipped with second spout 607 on the connecting rod 605, and second fixed column 606 sliding connection is in second spout 607.
The supporting plate 101 is provided with a through hole 102, the rotating plate 4 is rotatably connected in the through hole 102, and an elastic member 401 is connected between the outer wall of the top of the rotating plate 4 and the inner wall of the through hole 102.
The outer wall of the top plate 103 is connected with a reciprocating cylinder 3, a fixed disc 301 is connected at the output end of the reciprocating cylinder 3, eight mounting holes 302 are further formed in the outer wall of the fixed disc 301, and an ultrasonic welding head 303 is connected in the mounting holes 302.
In the invention, the specific working process of the transmission part is as follows: the sliding rod 5 moves downwards, so as to drive the pulley at the bottom to move on the sloping block 6, and simultaneously drive the sliding block 601 to move, because the sloping block 6 is provided with a slope, the sliding rod 5 can be conveniently moved by the first fixing column 505 and the first sliding chute 501, so that a certain inclination can be generated, the sliding block 601 can be conveniently pushed to move, the sliding block 601 can drive the push rod 602 to move, so as to push the connecting rod 605 to move, the connecting rod 605 can be positioned by the second fixing column 606 and the second sliding chute 607, so as to conveniently push the push plate 7 to move, then the second fixture block 701 on the push plate 7 can push the first fixture block 203 on the disc 202, the disc 202 can rotate by a certain angle under the action of the positioning block 702, so that the next power adapter on the rotary disc 201 is matched with the ultrasonic welding head 303, when the fixing plate on the fixing disc 301 continuously moves upwards to be matched and separated with the rotating plate 4, the first spring 504 and the second spring 604 can make the sliding rod 5, the sliding block 601, the push rod 602 and the connecting rod 605 automatically reset, so as to facilitate repeated operation, meanwhile, the connecting rod 605 can drive the push plate 7 to move, and then the second fixture block 701 on the push plate 7 can rotate in the cavity, so that the disc 202 cannot be pushed to rotate, and meanwhile, the disc can be conveniently reset, so that the disc can be repeatedly used.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The ultrasonic multi-station welding machine for the power adapter shell comprises a base (1) and is characterized in that the outer wall of the top of the base (1) is rotatably connected with a rotating shaft (2), the outer wall of the top of the rotating shaft (2) is rotatably connected with a turntable (201), and eight station chucks are arranged on the turntable (201);
the outer wall of the top of the base (1) is also connected with a supporting plate (101), the outer wall of the top of the supporting plate (101) is connected with a top plate (103), the bottom of the top plate (103) is connected with a fixed disc (301), and the bottom of the fixed disc (301) is connected with an ultrasonic welding head (303);
the outer wall of the supporting plate (101) is connected with a rotating plate (4) through a first connecting plate, and the outer wall of the fixed plate (301) is provided with a fixed plate matched with the rotating plate (4);
the outer wall of the supporting plate (101) is further connected with a sliding rod (5) matched with the rotating plate (4) in a sliding mode, and the sliding rod (5) drives the rotating shaft (2) to rotate through a transmission piece.
2. The ultrasonic multistation welding machine for the power adapter shell is characterized in that the transmission part mainly comprises a push rod (602), a connecting rod (605), a push plate (7) and a disc (202), an inclined block (6) is connected between the supporting plate (101) and the base (1), a sliding block (601) is connected onto the inclined block (6) in a sliding mode, the push rod (602) is fixedly connected onto the outer wall of the sliding block (601), pulleys matched with the sliding block (601) are arranged at the bottom of the sliding rod (5), two ends of the connecting rod (605) are respectively connected with the push rod (602) and the push plate (7) in a rotating mode, and the push plate (7) is matched with the disc (202).
3. The ultrasonic multistation welding machine for the power adapter shell according to claim 2 is characterized in that a cavity is formed in the pushing plate (7), a second clamping block (701) is rotatably connected in the cavity, and a first clamping block (203) meshed with the disk (202) is connected to the outer wall of the disk.
4. The ultrasonic multi-station welding machine for the power adapter shell as claimed in claim 3, wherein a positioning block (702) abutting against the second clamping block (701) is further arranged on the outer wall of the pushing plate (7), and a third spring (703) is further connected between the second clamping block (701) and the inner wall of the cavity.
5. The ultrasonic multistation welding machine for the power adapter shell according to claim 4 is characterized in that a fixing block (603) is fixedly connected to the outer wall of the inclined block (6), the push rod (602) is slidably connected in the fixing block (603), a second spring (604) is sleeved on the outer wall of the push rod (602), and the second spring (604) is connected between the sliding block (601) and the fixing block (603).
6. The ultrasonic multistation welding machine for the power adapter shell according to claim 5 is characterized in that a fixing ring (503) is arranged on the outer wall of the supporting plate (101), the sliding rod (5) is connected in the fixing ring (503) in a sliding mode, a first fixing column (505) is further connected to the outer wall of the supporting plate (101) through a second connecting plate, a first sliding groove (501) is formed in the outer wall of the sliding rod (5), the first fixing column (505) is connected in the first sliding groove (501) in a sliding mode, a baffle plate (502) is further arranged on the outer wall of the sliding rod (5), a first spring (504) is connected to the bottom of the baffle plate (502), and the bottom of the first spring (504) abuts against the outer wall of the fixing ring (503).
7. The ultrasonic multistation welding machine for the power adapter shell according to claim 6 is characterized in that a second fixing column (606) is fixedly connected in the base (1), a second sliding groove (607) is formed in the connecting rod (605), and the second fixing column (606) is connected in the second sliding groove (607) in a sliding mode.
8. The ultrasonic multistation welding machine for the power adapter shell according to claim 1 is characterized in that a through hole (102) is formed in the supporting plate (101), the rotating plate (4) is rotatably connected in the through hole (102), and an elastic part (401) is connected between the outer wall of the top of the rotating plate (4) and the inner wall of the through hole (102).
9. The ultrasonic multistation welding machine for the power adapter shell is characterized in that a reciprocating cylinder (3) is connected to the outer wall of the top plate (103), the fixed plate (301) is connected to the output end of the reciprocating cylinder (3), eight mounting holes (302) are further formed in the outer wall of the fixed plate (301), and the ultrasonic welding head (303) is connected into the mounting holes (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047067.6A CN111098015A (en) | 2020-01-16 | 2020-01-16 | Power adapter shell ultrasonic wave multistation welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047067.6A CN111098015A (en) | 2020-01-16 | 2020-01-16 | Power adapter shell ultrasonic wave multistation welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111098015A true CN111098015A (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010047067.6A Pending CN111098015A (en) | 2020-01-16 | 2020-01-16 | Power adapter shell ultrasonic wave multistation welding machine |
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| CN (1) | CN111098015A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222663A (en) * | 2020-10-29 | 2021-01-15 | 林荣富 | Rotatable pressure sensor and use method thereof |
| CN114101891A (en) * | 2021-10-25 | 2022-03-01 | 江西高亿科技有限公司 | Umbrella welding device and umbrella manufacturing system |
-
2020
- 2020-01-16 CN CN202010047067.6A patent/CN111098015A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222663A (en) * | 2020-10-29 | 2021-01-15 | 林荣富 | Rotatable pressure sensor and use method thereof |
| CN114101891A (en) * | 2021-10-25 | 2022-03-01 | 江西高亿科技有限公司 | Umbrella welding device and umbrella manufacturing system |
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