CN112872132A - Heat dissipation copper pipe bending device and pipe bending method thereof - Google Patents
Heat dissipation copper pipe bending device and pipe bending method thereof Download PDFInfo
- Publication number
- CN112872132A CN112872132A CN202011588557.3A CN202011588557A CN112872132A CN 112872132 A CN112872132 A CN 112872132A CN 202011588557 A CN202011588557 A CN 202011588557A CN 112872132 A CN112872132 A CN 112872132A
- Authority
- CN
- China
- Prior art keywords
- copper pipe
- annealing
- pipe
- box
- copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 101
- 239000010949 copper Substances 0.000 title claims abstract description 101
- 238000005452 bending Methods 0.000 title claims abstract description 68
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000000137 annealing Methods 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Images
Classifications
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- 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
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat-dissipation copper pipe bending device and a bending method thereof. Annealing treatment is carried out on the bent pipe turning position after the copper pipe coil is unreeled, subsequent on-line pipe bending treatment is facilitated, the bent pipe quality can be improved through annealing treatment on the bent position, the pipe bending forming efficiency is high, resilience is small, and the processing efficiency is greatly improved through on-line pipe bending treatment.
Description
Technical Field
The invention relates to the technical field of heat dissipation copper pipe processing, in particular to a heat dissipation copper pipe bending device and a pipe bending method thereof.
Background
At present, most of heat dissipation copper pipes are of bent pipe structures, and the heat dissipation effect can be improved in a certain space; the existing heat dissipation copper pipe is mostly formed by unreeling a copper pipe coil to be straight, cutting the straight copper pipe into a straight copper pipe section, and finally performing pipe bending treatment on the straight copper pipe section, so that the operation is complex and the processing efficiency is low; the online pipe bending treatment can not be realized, and the resilience of the bent pipe is large, so that the subsequent installation is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a heat-dissipation copper pipe bending device and a pipe bending method thereof, which can realize online pipe bending treatment and have small resilience of a bent pipe.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a heat dissipation copper pipe swan neck system, includes that the copper pipe unreels the frame, still includes copper pipe turn guide pulley group, annealing processing case, copper pipe bending processing structure and cooling structure, copper pipe turn guide pulley group sets up between copper pipe unreels frame and annealing processing case, copper pipe bending processing structure and cooling structure set gradually according to production and processing traffic direction.
The copper pipe unreels the below of frame and is equipped with the removal crane, the copper pipe unreels and erects on the removal crane, the removal crane includes lift support frame and the removal jar that is used for driving lift support frame to remove, and lift support frame links to each other with the piston rod tip that removes the jar.
The copper pipe turning guide wheel set comprises two pairs of limiting wheels and a guide wheel, the pair of limiting wheels comprises two idler wheels which are oppositely arranged, a gap for the copper pipe to pass through is formed between the two idler wheels, and the guide wheel is located between the two pairs of limiting wheels.
Still include the sliding adjustment support, the setting of annealing case portable adjustment position is on the sliding adjustment support, is equipped with electric putter on the sliding adjustment support, and electric putter's tip links to each other with the annealing case.
The copper pipe processing structure that bends includes the return bend mould and promotes the jar, be equipped with on the return bend mould and be used for the leading-in guide hole of copper pipe, be equipped with on the promotion jar and be used for bending the arc roof of handling to the copper pipe through the return bend mould, it is equipped with the return bend template to correspond the arc roof on the return bend mould, be equipped with the arc wall on the side of return bend template.
The cooling structure comprises a cooling box, wherein a suction opening is formed in the top of the cooling box, a group of spray nozzles are arranged at the bottom of the cooling box, a wind guide filter plate is arranged at the suction opening, and a circle of inclined holes arranged along the circumferential direction are formed in the wind guide filter plate.
The annealing treatment box comprises an annealing box base and a top cover arranged on the annealing box base, wherein one side of the top cover is hinged to one side of the annealing box base.
The drying device is characterized in that a drying box is arranged at the outlet of the cooling box, wiping rollers are arranged behind the drying box, a hot air blowing nozzle is arranged at the top of the drying box, the two wiping rollers are vertically and oppositely arranged, and a gap through which a bent pipe passes is formed between the two wiping rollers.
A method for bending a pipe by using the heat dissipation copper pipe bending device comprises the following steps:
1) unwinding a copper pipe coil arranged on a copper pipe unwinding frame, and turning the unwound copper pipe into an annealing treatment box for annealing treatment through a copper pipe turning guide wheel set, wherein the annealing temperature range of the annealing treatment box is 200-300 ℃;
2) annealing the copper pipe is intermittent annealing, only annealing the subsequent bending part of the copper pipe is carried out, the annealed copper pipe enters a pipe bending die, and the annealed copper pipe is pushed into an arc-shaped groove of a pipe bending die plate through an arc-shaped top plate to bend the copper pipe;
3) and the processed bent pipe enters a cooling box for spray suction cooling.
Compared with the prior art, the invention has the following advantages:
the heat dissipation copper pipe bending device and the bending method thereof are reasonable in design, annealing treatment is carried out on the bent pipe turning position after the copper pipe coil is unreeled, subsequent on-line pipe bending treatment is facilitated, the bent pipe quality can be improved through annealing treatment on the bent position, the pipe bending forming efficiency is high, resilience is small, and the machining efficiency is greatly improved through on-line pipe bending treatment.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of the apparatus of the present invention.
In the figure:
1. the device comprises a copper pipe unreeling frame, 2 mobile lifting frames, 3 copper pipe turning guide wheel sets, 4 sliding adjusting supports, 5 electric push rods, 6 annealing treatment boxes, 7 pipe bending dies, 8 pushing cylinders, 9 arc-shaped top plates, 10 pipe bending die plates, 11 cooling boxes, 12 air guide filter plates and 13 wiping rollers.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in fig. 1, the heat dissipation copper pipe bending device comprises a copper pipe unreeling frame 1, a copper pipe turning guide wheel set 3, an annealing treatment box 6, a copper pipe bending treatment structure and a cooling structure, wherein the copper pipe turning guide wheel set 3 is arranged between the copper pipe unreeling frame and the annealing treatment box, the copper pipe bending treatment structure and the cooling structure are sequentially arranged according to the production and processing running direction.
A movable lifting frame 2 is arranged below the copper pipe unreeling frame, the copper pipe unreeling frame is arranged on the movable lifting frame, the movable lifting frame comprises a lifting support frame and a movable cylinder for driving the lifting support frame to move, and the lifting support frame is connected with the end part of a piston rod of the movable cylinder; the copper pipe coil is convenient to mount and dismount, and the operation is simple and convenient.
The copper pipe turning guide wheel group 3 comprises two pairs of limiting wheels and a guide wheel, the pair of limiting wheels comprises two idler wheels which are oppositely arranged, a gap for the copper pipe to pass through is formed between the two idler wheels, and the guide wheel is located between the two pairs of limiting wheels. The copper pipe is stable and reliable in steering, can be ensured to enter the annealing treatment box stably in the follow-up process, and realizes the on-line stable processing.
The annealing treatment box is characterized by further comprising a sliding adjusting support 4, the annealing treatment box is movably arranged on the sliding adjusting support, an electric push rod 5 is arranged on the sliding adjusting support 4, and the end part of the electric push rod 5 is connected with the annealing treatment box. The annealing treatment of the copper pipe is only carried out on the bending part, and the annealing treatment is not carried out on other positions, so that the production is efficient; and the bending part is easy to bend through annealing treatment, is not easy to damage, has small resilience and is convenient for subsequent installation.
Copper pipe processing structure that bends includes bending die 7 and promotion jar 8, be equipped with on the bending die and be used for the leading-in guide hole of copper pipe, be equipped with on the promotion jar and be used for bending the arc roof 9 of handling through the copper pipe of bending die, it is equipped with return bend template 10 to correspond the arc roof on the bending die, be equipped with the arc wall on the side of return bend template.
The pushing cylinder and the pipe bending template are arranged on two sides of the mold oppositely, the arc-shaped grooves are formed in the side faces of the template, the pipe bending template is arranged on the mold through the pushing cylinder, and after pipe bending treatment is completed, the pushing cylinder pushes the pipe bending template away from the mold, so that pipe bending can move on line conveniently.
The cooling structure comprises a cooling box 11, wherein a suction opening is formed in the top of the cooling box, a group of spray nozzles are arranged at the bottom of the cooling box, an air guide filter plate 12 is arranged at the suction opening, and a circle of inclined holes arranged along the circumferential direction are formed in the air guide filter plate. Water mist is sprayed out through the group of spray nozzles, an air flow is formed at a suction port, and the water mist forms a cooling water mist air flow in the cooling box, so that the bent pipe is cooled efficiently. Be equipped with the arc guide plate in the cooler bin, the cooperation wind-guiding filter forms ascending rotatory air current, and the cooling is abundant.
The annealing treatment box comprises an annealing box base and a top cover arranged on the annealing box base, wherein one side of the top cover is hinged to one side of the annealing box base; the copper pipe is convenient to install in the annealing box, and the operation is simple and convenient.
The outlet of the cooling box is provided with a drying box, the rear part of the drying box is provided with a wiping roller 13, the top of the drying box is provided with a hot air blowing nozzle, the two wiping rollers are vertically and oppositely arranged, and a gap through which a bent pipe passes is formed between the two wiping rollers.
The invention discloses a method for bending a pipe by using a heat-dissipation copper pipe bending device, which comprises the following steps:
1) unwinding a copper pipe coil arranged on a copper pipe unwinding frame, and turning the unwound copper pipe into an annealing treatment box for annealing treatment through a copper pipe turning guide wheel set, wherein the annealing temperature range of the annealing treatment box is 200-300 ℃;
2) annealing the copper pipe is intermittent annealing, only annealing the subsequent bending part of the copper pipe is carried out, the annealed copper pipe enters a pipe bending die, and the annealed copper pipe is pushed into an arc-shaped groove of a pipe bending die plate through an arc-shaped top plate to bend the copper pipe;
3) and the processed bent pipe enters a cooling box for spray suction cooling.
The heat dissipation copper pipe bending device and the bending method thereof are reasonable in design, annealing treatment is carried out on the bent pipe turning position after the copper pipe coil is unreeled, subsequent on-line pipe bending treatment is facilitated, the bent pipe quality can be improved through annealing treatment on the bent position, the pipe bending forming efficiency is high, resilience is small, and the processing efficiency is greatly improved through on-line pipe bending treatment.
The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (9)
1. The utility model provides a heat dissipation copper pipe swan neck system, includes that the copper pipe unreels the frame, its characterized in that: still include copper pipe turn guide pulley group, annealing processing case, copper pipe bend and handle structure and cooling structure, copper pipe turn guide pulley group sets up between copper pipe unreeling frame and annealing processing case, copper pipe bend and handle structure and cooling structure set gradually according to production and processing traffic direction.
2. A heat sink copper tube bending apparatus as recited in claim 1, further comprising: the copper pipe unreels the below of frame and is equipped with the removal crane, the copper pipe unreels and erects on the removal crane, the removal crane includes lift support frame and the removal jar that is used for driving lift support frame to remove, and lift support frame links to each other with the piston rod tip that removes the jar.
3. A heat sink copper tube bending apparatus as recited in claim 1, further comprising: the copper pipe turning guide wheel set comprises two pairs of limiting wheels and a guide wheel, the pair of limiting wheels comprises two idler wheels which are oppositely arranged, a gap for the copper pipe to pass through is formed between the two idler wheels, and the guide wheel is located between the two pairs of limiting wheels.
4. A heat sink copper tube bending apparatus as recited in claim 1, further comprising: still include the sliding adjustment support, the setting of annealing case portable adjustment position is on the sliding adjustment support, is equipped with electric putter on the sliding adjustment support, and electric putter's tip links to each other with the annealing case.
5. A heat sink copper tube bending apparatus as recited in claim 1, further comprising: the copper pipe processing structure that bends includes the return bend mould and promotes the jar, be equipped with on the return bend mould and be used for the leading-in guide hole of copper pipe, be equipped with on the promotion jar and be used for bending the arc roof of handling to the copper pipe through the return bend mould, it is equipped with the return bend template to correspond the arc roof on the return bend mould, be equipped with the arc wall on the side of return bend template.
6. A heat sink copper tube bending apparatus as recited in claim 1, further comprising: the cooling structure comprises a cooling box, wherein a suction opening is formed in the top of the cooling box, a group of spray nozzles are arranged at the bottom of the cooling box, a wind guide filter plate is arranged at the suction opening, and a circle of inclined holes arranged along the circumferential direction are formed in the wind guide filter plate.
7. The heat dissipating copper tube bending apparatus according to claim 4, wherein: the annealing treatment box comprises an annealing box base and a top cover arranged on the annealing box base, wherein one side of the top cover is hinged to one side of the annealing box base.
8. The heat dissipating copper tube bending apparatus according to claim 6, wherein: the drying device is characterized in that a drying box is arranged at the outlet of the cooling box, wiping rollers are arranged behind the drying box, a hot air blowing nozzle is arranged at the top of the drying box, the two wiping rollers are vertically and oppositely arranged, and a gap through which a bent pipe passes is formed between the two wiping rollers.
9. A method of bending a tube using the apparatus according to any one of claims 1 to 8, wherein: the method comprises the following steps:
1) unwinding a copper pipe coil arranged on a copper pipe unwinding frame, and turning the unwound copper pipe into an annealing treatment box for annealing treatment through a copper pipe turning guide wheel set, wherein the annealing temperature range of the annealing treatment box is 200-300 ℃;
2) annealing the copper pipe is intermittent annealing, only annealing the subsequent bending part of the copper pipe is carried out, the annealed copper pipe enters a pipe bending die, and the annealed copper pipe is pushed into an arc-shaped groove of a pipe bending die plate through an arc-shaped top plate to bend the copper pipe;
3) and the processed bent pipe enters a cooling box for spray suction cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011588557.3A CN112872132A (en) | 2020-12-29 | 2020-12-29 | Heat dissipation copper pipe bending device and pipe bending method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011588557.3A CN112872132A (en) | 2020-12-29 | 2020-12-29 | Heat dissipation copper pipe bending device and pipe bending method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112872132A true CN112872132A (en) | 2021-06-01 |
Family
ID=76046002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011588557.3A Pending CN112872132A (en) | 2020-12-29 | 2020-12-29 | Heat dissipation copper pipe bending device and pipe bending method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112872132A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4061005A (en) * | 1975-09-18 | 1977-12-06 | Daiichi Koshuha Kogyo Kabushiki Kaisha | Method and apparatus for continuous bending of elongated materials |
| CN1723092A (en) * | 2002-12-21 | 2006-01-18 | 威兰德-沃克公开股份有限公司 | Method for rationally producing U-shaped heat exchange tubes |
| CN101132869A (en) * | 2005-03-03 | 2008-02-27 | 住友金属工业株式会社 | Method for bending metal material, bending machine, bending-equipment line, and bent product thereof |
| CN101797602A (en) * | 2010-04-15 | 2010-08-11 | Bac大连有限公司 | Production process and production line for continuous stainless steel coil |
| US20100270013A1 (en) * | 2009-04-23 | 2010-10-28 | Dong Ha Lee | Turn-fin tube, manufacturing apparatus of the turn-fin tube, manufacturing method of the turn-fin tube and turn-fin type heat exchanger using the turn-fin tube |
| CN208266214U (en) * | 2018-06-01 | 2018-12-21 | 广东石油化工学院 | A kind of use for laboratory Heat-Treatment of Steel normalizing cooling device |
| CN212070062U (en) * | 2020-03-23 | 2020-12-04 | 苏州宜承热能科技有限公司 | A pneumatic bending machine for heat pipe production |
-
2020
- 2020-12-29 CN CN202011588557.3A patent/CN112872132A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4061005A (en) * | 1975-09-18 | 1977-12-06 | Daiichi Koshuha Kogyo Kabushiki Kaisha | Method and apparatus for continuous bending of elongated materials |
| CN1723092A (en) * | 2002-12-21 | 2006-01-18 | 威兰德-沃克公开股份有限公司 | Method for rationally producing U-shaped heat exchange tubes |
| CN101132869A (en) * | 2005-03-03 | 2008-02-27 | 住友金属工业株式会社 | Method for bending metal material, bending machine, bending-equipment line, and bent product thereof |
| US20100270013A1 (en) * | 2009-04-23 | 2010-10-28 | Dong Ha Lee | Turn-fin tube, manufacturing apparatus of the turn-fin tube, manufacturing method of the turn-fin tube and turn-fin type heat exchanger using the turn-fin tube |
| CN101797602A (en) * | 2010-04-15 | 2010-08-11 | Bac大连有限公司 | Production process and production line for continuous stainless steel coil |
| CN208266214U (en) * | 2018-06-01 | 2018-12-21 | 广东石油化工学院 | A kind of use for laboratory Heat-Treatment of Steel normalizing cooling device |
| CN212070062U (en) * | 2020-03-23 | 2020-12-04 | 苏州宜承热能科技有限公司 | A pneumatic bending machine for heat pipe production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205887993U (en) | Mold cooling device of zinc ingot production usefulness | |
| CN112872132A (en) | Heat dissipation copper pipe bending device and pipe bending method thereof | |
| CN203565631U (en) | Stamping die of oval-tube fins of heat exchangers | |
| CN213866341U (en) | On-line rapid cooling device for large-diameter seamless steel pipe | |
| CN202199609U (en) | Improved structure of wire drawing bench | |
| CN209176129U (en) | A kind of mold cooling device | |
| CN209341675U (en) | A kind of cooling device of mould steel | |
| CN217578989U (en) | Quenching oil removing and absorbing device at outlet of metal card clothing quenching oil tank | |
| CN216176409U (en) | Forming device for casting aluminum bar | |
| CN210305069U (en) | Inverted wire drawing and winding combined unit | |
| CN221133583U (en) | Cooling mechanism and roller processing device | |
| CN213660067U (en) | Vertical enameled wire forming machine | |
| CN211084593U (en) | Shaping cooling arrangement is used in aluminium product processing | |
| CN212418560U (en) | UV roller coat is with upper and lower reposition of redundant personnel air duct device | |
| CN210647767U (en) | High-precision wire drawing machine with rust removal function | |
| CN209578556U (en) | Welder is used in a kind of production of metal door and window | |
| CN210160197U (en) | Correcting device for assembling radiating tube and inner fin | |
| CN112981087A (en) | Copper strips electrical tempering equipment | |
| CN215856266U (en) | Copper strips electrical tempering equipment | |
| CN218690668U (en) | Novel spraying is used in aluminium alloy production device | |
| CN111421087A (en) | Automatic thread feeding and threading device | |
| CN204504164U (en) | A kind of argon gas cooling device produced for neodymium iron boron thin slice | |
| CN217252657U (en) | Aluminum ingot forming equipment | |
| CN214991936U (en) | Air cooling device of continuous annealing tinning machine | |
| CN205088322U (en) | Copper strips tin -plating machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210601 |
|
| RJ01 | Rejection of invention patent application after publication |