CN113857367A - Reducing copper alloy processing device - Google Patents
Reducing copper alloy processing device Download PDFInfo
- Publication number
- CN113857367A CN113857367A CN202111207888.2A CN202111207888A CN113857367A CN 113857367 A CN113857367 A CN 113857367A CN 202111207888 A CN202111207888 A CN 202111207888A CN 113857367 A CN113857367 A CN 113857367A
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- opening
- positioning
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- column
- ring body
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 101001018064 Homo sapiens Lysosomal-trafficking regulator Proteins 0.000 description 1
- 102100033472 Lysosomal-trafficking regulator Human genes 0.000 description 1
- 235000010703 Modiola caroliniana Nutrition 0.000 description 1
- 244000038561 Modiola caroliniana Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a variable-diameter copper alloy processing device which comprises a telescopic driving mechanism, a rotary driving mechanism, a jacking head and a variable-diameter jacking assembly, wherein the telescopic driving mechanism is arranged on the top of the rotary driving mechanism; the variable-diameter abutting assembly is additionally arranged at the upper end of the abutting head, the floating column is driven to move up and down by driving the ring body to rotate on the external threaded column in a threaded manner, when the floating column moves downwards, the sleeve connecting rod is rotated outwards, the telescopic linkage rod is driven to rotate outwards, meanwhile, the upper end of the telescopic linkage rod is inserted into the lower end of the rotary sleeve connecting rod in a sliding manner, the lower end of the telescopic linkage rod slides in the sliding clamping groove of the opening and closing arc plate and drives the opening and closing arc plate to rotate inwards, the abutting diameter enclosed by the opening and closing arc plates is reduced, the reverse movement is realized when the floating column moves upwards, synchronous opening and closing adjustment of the opening and closing arc plates is realized, and the abutting diameter enclosed by the opening and closing arc plates is further adjusted.
Description
Technical Field
The invention relates to a variable-diameter copper alloy processing device.
Background
The copper alloy is an alloy formed by adding one or more other elements into pure copper serving as a matrix. The pure copper is mauve, also called as red copper, and has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance; the method is mainly used for manufacturing electrical equipment such as a generator, a bus, a cable, a switching device and a transformer, heat-conducting equipment such as a heat exchanger, a pipeline and a flat plate collector of a solar heating device; commonly used copper alloys are classified into brass, bronze, cupronickel; in the process of processing the metal plate, the metal plate is often required to be subjected to jacking bending or jacking hole forming and the like so as to meet the requirements of installation and use, which are common procedures in the process of processing the metal plate, and the jacking diameter of the copper alloy in the process of jacking bending or hole forming of a plurality of copper alloys is fixed and cannot be finely adjusted, so that matched jacking heads need to be replaced in the actual use process, and the operation is very inconvenient.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the problems that: the variable-diameter copper alloy processing device is flexible and convenient to adjust and stable in structure.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a variable-diameter copper alloy processing device comprises a telescopic driving mechanism, a rotary driving mechanism, a jacking head and a variable-diameter jacking assembly; the lower end of the telescopic driving mechanism is provided with a rotary driving mechanism; the lower end of the rotary driving mechanism is provided with a reducing abutting assembly through a rotating shaft; the reducing pressing assembly comprises an external threaded column, a driving ring body, a connecting column, a connecting plate, an opening and closing arc plate, a floating column, a rotating sleeving rod and a telescopic linkage rod; the lower end of the rotating shaft is provided with an external thread column; the lower end of the external thread column is provided with a connecting column; the lower end of the connecting column is provided with a connecting plate; the lower end of the connecting plate is provided with a jacking head; a driving ring body is rotatably sleeved on the upper thread of the external thread column; the periphery of the lower end of the driving ring body is respectively and uniformly rotationally clamped with a plurality of floating columns; the lower ends of the floating columns are respectively provided with a rotating sleeve rod, and the upper ends of the rotating sleeve rods are respectively connected to the lower ends of the floating columns in a rotating manner; the lower end of the rotary sleeve rod is respectively in sliding sleeve joint with the upper end of one telescopic linkage rod; a plurality of opening and closing arc-shaped plates are uniformly arranged on the periphery of the upper end of the connecting plate; the lower ends of the opening and closing arc-shaped plates are respectively and rotatably connected to the upper end surface of the connecting plate; the inner side of the upper part of the opening and closing arc-shaped plate is respectively connected with the lower end of a telescopic linkage rod in a sliding and clamping manner; when the driving ring body rotates on the external thread column in a threaded mode, the plurality of opening and closing arc-shaped plates are driven to rotate to open and close at the upper end of the connecting plate, and the outer sides of the peripheries of the plurality of opening and closing arc-shaped plates form a circular track in a surrounding mode.
Further, the device also comprises a positioning and fastening mechanism; the positioning and fastening mechanism comprises a longitudinal positioning rod, a positioning screw rod, a positioning threaded ring and a semicircular annular plate; a longitudinal positioning rod is arranged on one side of the upper end of the driving ring body; the upper end of the longitudinal positioning rod is provided with a positioning screw rod; a semicircular annular plate is arranged on one side of the rotating shaft; the semicircular annular plate is provided with a semicircular arc-shaped slot; the upper end of the positioning screw rod is connected to the semicircular arc-shaped open slot of the semicircular annular plate in a penetrating manner; the positioning screw is respectively in threaded sleeve connection with two positioning threaded rings, the positioning threaded rings are respectively located on the upper side and the lower side of the semicircular annular plate, and the positioning threaded rings are rotationally abutted to or separately connected to the upper side and the lower side of the semicircular annular plate on the positioning screw.
Furthermore, the periphery of the upper end of the connecting plate is respectively provided with a positioning block; the positioning blocks are respectively rotatably connected with a penetrating rod in a penetrating way; two ends of the penetrating rod extend to two ends of the positioning block respectively, and the upper ends of two sides of the penetrating rod are connected with U-shaped connecting pieces; the upper end of the U-shaped connecting piece is arranged at the bottom of the opening and closing arc-shaped plate.
Furthermore, a limiting ring body is arranged on the connecting column; the external thread column and the connecting column are sleeved with abutting elastomers; and two ends of the abutting elastic body are elastically abutted between the limiting ring body and the driving ring body respectively.
Furthermore, sliding clamping grooves are respectively formed in the inner sides of the upper parts of the opening and closing arc-shaped plates; the lower ends of the telescopic linkage rods are respectively connected to the sliding clamping grooves of the opening and closing arc-shaped plates in a sliding clamping mode.
Furthermore, a plurality of rotary clamping grooves are uniformly formed in the periphery of the lower end of the driving ring body; the upper end of the floating column is provided with a rotary clamping tooth; the rotary clamping teeth at the upper end of the floating column are rotationally clamped with the rotary clamping grooves at the lower end of the driving ring body.
Furthermore, the jacking head is of a conical structure with a large upper part and a small lower part.
The invention has the following beneficial effects:
1. the variable-diameter abutting assembly is additionally arranged at the upper end of the abutting head, the floating column is driven to move up and down by driving the ring body to rotate on the external threaded column in a threaded manner, when the floating column moves downwards, the sleeve connecting rod is rotated outwards, the telescopic linkage rod is driven to rotate outwards, meanwhile, the upper end of the telescopic linkage rod is inserted into the lower end of the rotary sleeve connecting rod in a sliding manner, the lower end of the telescopic linkage rod slides in the sliding clamping groove of the opening and closing arc plate and drives the opening and closing arc plate to rotate inwards, the abutting diameter enclosed by the opening and closing arc plates is reduced, the reverse movement is realized when the floating column moves upwards, synchronous opening and closing adjustment of the opening and closing arc plates is realized, and the abutting diameter enclosed by the opening and closing arc plates is further adjusted.
2. According to the invention, the positioning fastening mechanism is arranged on one side of the upper end of the driving ring body, when the driving ring body rotates, the upper end of the positioning screw rod can be synchronously driven to stretch and rotate on the semicircular arc-shaped open groove of the semicircular annular plate, and after the adjustment is finished, the positioning threaded ring is rotatably supported and connected to the upper side and the lower side of the semicircular annular plate on the positioning screw rod in a pressing manner, so that the positioning screw rod is locked, the whole reducing pressing assembly is locked, and the structure is more stable.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of fig. 1 according to the present invention.
Fig. 3 is an enlarged schematic structural view of the diameter-reducing pressing assembly in fig. 2 according to the present invention.
FIG. 4 is a schematic top view of the positioning and fastening mechanism of FIG. 1 according to the present invention.
Fig. 5 is a schematic sectional top view of the enclosure of the plurality of opening/closing arc-shaped plates in fig. 1.
Fig. 6 is a schematic side view of the rotary connection between the lower end of the opening arc plate and the connecting plate in fig. 1.
Fig. 7 is an enlarged structural schematic view of the positioning and fastening mechanism in fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, a variable diameter copper alloy processing device includes a telescopic driving mechanism 1, a rotary driving mechanism 2, a top pressing head 3, and a variable diameter pressing assembly 4; the lower end of the telescopic driving mechanism 1 is provided with a rotary driving mechanism 2, the telescopic driving mechanism 1 can be a telescopic cylinder, and the rotary driving mechanism 2 can be a rotary motor; the lower end of the rotary driving mechanism 2 is provided with a reducing pressing component 4 through a rotating shaft 21; the reducing pressing component 4 comprises an external thread column 41, a driving ring body 42, a connecting column 48, a connecting plate 47, an opening and closing arc plate 46, a floating column 43, a rotating sleeve rod 44 and a telescopic linkage rod 45; the lower end of the rotating shaft 21 is provided with an external threaded column 41; the lower end of the external thread column 41 is provided with a connecting column 48; the lower end of the connecting column 48 is provided with a connecting plate 47; the lower end of the connecting plate 47 is provided with a top pressing head 3; a driving ring body 42 is rotatably sleeved on the upper thread of the external thread column 41; the periphery of the lower end of the driving ring body 42 is respectively and uniformly clamped with a plurality of floating columns 43 in a rotating manner; the lower ends of the floating columns 43 are respectively provided with a rotating sleeve rod 44, and the upper ends of the rotating sleeve rods 44 are respectively connected to the lower ends of the floating columns 43 in a rotating manner; the lower end of the rotating sleeve joint rod 44 is respectively in sliding sleeve joint with the upper end of a telescopic linkage rod 45; a plurality of opening and closing arc-shaped plates 46 are uniformly arranged on the periphery of the upper end of the connecting plate 47; the lower ends of the opening and closing arc-shaped plates 46 are respectively and rotatably connected to the upper end surface of the connecting plate 47; the inner sides of the upper parts of the opening and closing arc-shaped plates 46 are respectively connected with the lower end of a telescopic linkage rod 45 in a sliding and clamping manner; when the driving ring body 42 rotates on the external threaded column 41 through threads, the plurality of opening and closing arc-shaped plates 46 are driven to rotate to open and close at the upper end of the connecting plate 47, and the outer sides of the peripheries of the plurality of opening and closing arc-shaped plates 46 enclose a circular track.
As shown in fig. 1 to 7, in order to stabilize the structure of the driving ring body 42, it is further preferable to further include a positioning fastening mechanism 5; the positioning and fastening mechanism 5 comprises a longitudinal positioning rod 51, a positioning screw 52, a positioning threaded ring 54 and a semicircular annular plate 53; a longitudinal positioning rod 51 is arranged on one side of the upper end of the driving ring body 42; the upper end of the longitudinal positioning rod 51 is provided with a positioning screw rod 52; a semicircular annular plate 53 is arranged on one side of the rotating shaft 21; the semicircular annular plate 53 is provided with a semicircular arc-shaped open slot 531; the upper end of the positioning screw rod 52 is connected to the semicircular arc-shaped slot 531 of the semicircular annular plate 53 in a penetrating manner; the positioning screw 52 is respectively in threaded sleeve connection with two positioning threaded rings 54, the positioning threaded rings 54 are respectively located on the upper side and the lower side of the semicircular plate 53, and the positioning threaded rings 54 are rotatably abutted against or separately connected to the upper side and the lower side of the semicircular plate 53 on the positioning screw 52. Furthermore, a positioning block 471 is respectively installed around the upper end of the connecting plate 47; a penetrating rod 472 is rotatably connected to the positioning block 471 in a penetrating manner; two ends of the penetrating rod 472 extend to two ends of the positioning block 471 respectively, and the upper ends of two sides of the penetrating rod 472 are connected with a U-shaped connecting piece 473; the upper end of the U-shaped connecting member 473 is mounted to the bottom of the opening and closing arc 46. Further, a limiting ring 481 is arranged on the connecting column 48; the external threaded column 41 and the connecting column 48 are sleeved with an abutting elastic body 482; two ends of the abutting elastic body 482 respectively elastically abut against the limiting ring body 481 and the driving ring body 42. Further, the inner sides of the upper parts of the opening and closing arc-shaped plates 46 are respectively provided with a sliding clamping groove 461; the lower ends of the telescopic linkage rods 45 are respectively clamped on the sliding clamping slots 461 of the opening and closing arc-shaped plates 46 in a sliding manner. Further, a plurality of rotary clamping grooves 421 are uniformly arranged around the lower end of the driving ring body 42; the upper end of the floating column 43 is provided with a rotary clamping tooth 431; the rotary latch teeth 431 at the upper end of the floating post 43 are rotatably latched with the rotary latch grooves 421 at the lower end of the driving ring body 42. Further, the top pressure head 3 is in a conical structure with a large upper part and a small lower part.
The variable-diameter abutting assembly 4 is additionally arranged at the upper end of the abutting head 3, the floating post 43 is driven to move up and down by driving the ring body 42 to rotate on the external threaded post 41 in a threaded manner, when the floating post 43 moves downwards, the sleeving rod 44 is rotated outwards, the telescopic linkage rod 45 is driven to rotate outwards, meanwhile, the upper end of the telescopic linkage rod 45 is inserted into the lower end of the rotating sleeving rod 44 in a sliding manner, the lower end of the telescopic linkage rod 45 slides in the sliding clamping groove 461 of the opening and closing arc-shaped plate 46 and drives the opening and closing arc-shaped plate 46 to rotate inwards, the abutting diameter enclosed by the opening and closing arc-shaped plates 46 is reduced, the reverse movement is realized when the floating post 43 moves upwards, the synchronous opening and closing adjustment of the opening and closing arc-shaped plates 46 is realized, and the abutting diameter enclosed by the opening and closing arc-shaped plates 46 is further adjusted.
According to the invention, the positioning and fastening mechanism 5 is arranged on one side of the upper end of the driving ring body 42, when the driving ring body 42 rotates, the upper end of the positioning screw rod 52 can be synchronously driven to stretch and rotate on the semi-circular-arc-shaped groove 531 of the semi-circular annular plate 53, and after the adjustment is finished, the positioning threaded ring 54 is rotatably supported and connected to the upper side and the lower side of the semi-circular annular plate 53 on the positioning screw rod 52, so that the positioning screw rod 52 is locked, the whole reducing supporting and pressing assembly 4 is locked, and the structure is more stable.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A variable-diameter copper alloy processing device is characterized by comprising a telescopic driving mechanism, a rotary driving mechanism, a jacking head and a variable-diameter jacking assembly; the lower end of the telescopic driving mechanism is provided with a rotary driving mechanism; the lower end of the rotary driving mechanism is provided with a reducing abutting assembly through a rotating shaft; the reducing pressing assembly comprises an external threaded column, a driving ring body, a connecting column, a connecting plate, an opening and closing arc plate, a floating column, a rotating sleeving rod and a telescopic linkage rod; the lower end of the rotating shaft is provided with an external thread column; the lower end of the external thread column is provided with a connecting column; the lower end of the connecting column is provided with a connecting plate; the lower end of the connecting plate is provided with a jacking head; a driving ring body is rotatably sleeved on the upper thread of the external thread column; the periphery of the lower end of the driving ring body is respectively and uniformly rotationally clamped with a plurality of floating columns; the lower ends of the floating columns are respectively provided with a rotating sleeve rod, and the upper ends of the rotating sleeve rods are respectively connected to the lower ends of the floating columns in a rotating manner; the lower end of the rotary sleeve rod is respectively in sliding sleeve joint with the upper end of one telescopic linkage rod; a plurality of opening and closing arc-shaped plates are uniformly arranged on the periphery of the upper end of the connecting plate; the lower ends of the opening and closing arc-shaped plates are respectively and rotatably connected to the upper end surface of the connecting plate; the inner side of the upper part of the opening and closing arc-shaped plate is respectively connected with the lower end of a telescopic linkage rod in a sliding and clamping manner; when the driving ring body rotates on the external thread column in a threaded mode, the plurality of opening and closing arc-shaped plates are driven to rotate to open and close at the upper end of the connecting plate, and the outer sides of the peripheries of the plurality of opening and closing arc-shaped plates form a circular track in a surrounding mode.
2. The variable-diameter copper alloy processing device according to claim 1, further comprising a positioning and fastening mechanism; the positioning and fastening mechanism comprises a longitudinal positioning rod, a positioning screw rod, a positioning threaded ring and a semicircular annular plate; a longitudinal positioning rod is arranged on one side of the upper end of the driving ring body; the upper end of the longitudinal positioning rod is provided with a positioning screw rod; a semicircular annular plate is arranged on one side of the rotating shaft; the semicircular annular plate is provided with a semicircular arc-shaped slot; the upper end of the positioning screw rod is connected to the semicircular arc-shaped open slot of the semicircular annular plate in a penetrating manner; the positioning screw is respectively in threaded sleeve connection with two positioning threaded rings, the positioning threaded rings are respectively located on the upper side and the lower side of the semicircular annular plate, and the positioning threaded rings are rotationally abutted to or separately connected to the upper side and the lower side of the semicircular annular plate on the positioning screw.
3. The variable-diameter copper alloy processing device according to claim 1, wherein a positioning block is respectively mounted around the upper end of the connecting plate; the positioning blocks are respectively rotatably connected with a penetrating rod in a penetrating way; two ends of the penetrating rod extend to two ends of the positioning block respectively, and the upper ends of two sides of the penetrating rod are connected with U-shaped connecting pieces; the upper end of the U-shaped connecting piece is arranged at the bottom of the opening and closing arc-shaped plate.
4. The variable-diameter copper alloy processing device according to claim 1, wherein a limiting ring body is arranged on the connecting column; the external thread column and the connecting column are sleeved with abutting elastomers; and two ends of the abutting elastic body are elastically abutted between the limiting ring body and the driving ring body respectively.
5. The variable-diameter copper alloy processing device according to claim 1, wherein the inner sides of the upper portions of the opening and closing arc plates are respectively provided with a sliding clamping groove; the lower ends of the telescopic linkage rods are respectively connected to the sliding clamping grooves of the opening and closing arc-shaped plates in a sliding clamping mode.
6. The variable-diameter copper alloy processing device according to claim 1, wherein a plurality of rotary clamping grooves are uniformly formed around the lower end of the drive ring body; the upper end of the floating column is provided with a rotary clamping tooth; the rotary clamping teeth at the upper end of the floating column are rotationally clamped with the rotary clamping grooves at the lower end of the driving ring body.
7. The variable diameter copper alloy processing device according to claim 1, wherein the top pressure head is of a conical structure with a large top and a small bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111207888.2A CN113857367A (en) | 2021-10-18 | 2021-10-18 | Reducing copper alloy processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111207888.2A CN113857367A (en) | 2021-10-18 | 2021-10-18 | Reducing copper alloy processing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113857367A true CN113857367A (en) | 2021-12-31 |
Family
ID=78999928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111207888.2A Withdrawn CN113857367A (en) | 2021-10-18 | 2021-10-18 | Reducing copper alloy processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113857367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446486A (en) * | 2022-10-26 | 2022-12-09 | 楚能新能源股份有限公司 | Laser welding copper nozzle |
-
2021
- 2021-10-18 CN CN202111207888.2A patent/CN113857367A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446486A (en) * | 2022-10-26 | 2022-12-09 | 楚能新能源股份有限公司 | Laser welding copper nozzle |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211231 |
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| WW01 | Invention patent application withdrawn after publication |