CN105331845A - High-precision special-shaped copper alloy wire and processing technology thereof - Google Patents
High-precision special-shaped copper alloy wire and processing technology thereof Download PDFInfo
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- CN105331845A CN105331845A CN201510866279.6A CN201510866279A CN105331845A CN 105331845 A CN105331845 A CN 105331845A CN 201510866279 A CN201510866279 A CN 201510866279A CN 105331845 A CN105331845 A CN 105331845A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/01—Alloys based on copper with aluminium as the next major constituent
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Abstract
The invention discloses a high-precision special-shaped copper alloy wire and a processing technology thereof. The high-precision special-shaped copper alloy wire is prepared by using raw materials in parts by weight as follows: 66-88 parts of oxygen-free copper, 2-10 parts of zinc, 3-9 parts of aluminum, 2-5 parts of silicon, 2-4 parts of manganese, 1-2 parts of lead, 0.1-0.6 part of tin, 0.2-0.3 part of beryllium, 0.5-0.8 part of chromium, 0.2-0.5 part of zirconium, 0.4-0.9 part of beryllium, 0.3-0.6 part of tungsten and the balance of impurities. The processing technology comprises the following steps: dosing; smelting; pull-up drawing; continuous flattening; continuous drawing; annealing; pickling and passivating; and striping, inspecting and packaging. The processing flow is simple and convenient to operate and control; certain conventional pressure processing equipment is adopted; the equipment investment is low; the production process is short; the manufacturing cost is low; the product surface is smooth and clean; the precision is high; and a whole set of processing flows is finished clearly.
Description
Technical field
The present invention relates to copper alloy wire field, be specifically related to a kind of high-precision section copper alloy wire and complete processing thereof.
Background technology
Along with the develop rapidly of electronic industry, the demand of domestic and international high-precision section Copper and its alloy wire rod increases sharply.The production method of the current special-shaped Copper and its alloy wire rod of China mainly contains the techniques such as high speed hammering-High Precision Cold method, milling method, groove rolling method.Existing explained hereafter high-precision section Copper and its alloy wire rod also exists the shortcomings such as facility investment is large, made-up belt accuracy requirement is high, complex production process, the production cycle is long, production cost is high.
The purposes of copper material in electric power, communications industry is very widely, the special-shaped copper alloy wire of common alloy is saturated in low-end market, but the main dependence on import of the special-shaped copper alloy wire of special-shaped alloy needed for power industry high-end market, because its all technical requires strict, and belong to non complete symmetry type copper material in special shape due to the special-shaped copper alloy wire of special-shaped casting alloy, production difficulty is large, most dependence is from external import, but its good performance is significantly when current China energy anxiety.The special-shaped copper alloy wire of the current special-shaped casting alloy of China belongs to non complete symmetry type copper material in special shape, and all technical requires strict, and production difficulty is large.Except having the requirement of superelevation to the electric conductivity of material, singularity and the tolerance of shape also have strict demand.But want the index reaching each side also very difficult with existing technology.
Summary of the invention
For solving the problem, the invention provides a kind of high-precision section copper alloy wire and complete processing thereof.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of high-precision section copper alloy wire and complete processing thereof, comprise and being prepared from by the raw material of following weight part:
Oxygen free copper 66 ~ 88 parts, 2 ~ 10 parts, zinc, 3 ~ 9 parts, aluminium, silicon 2 ~ 5 parts, 2 ~ 4 parts, manganese, plumbous 1 ~ 2 part, 0.1 ~ 0.6 part, tin, beryllium 0.2 ~ 0.3 part, chromium 0.5 ~ 0.8 part, zirconium 0.2 ~ 0.5 part, beryllium 0.4 ~ 0.9 part, 0.3 ~ 0.6 part, tungsten, all the other are impurity.
Further, comprising the steps:, batching one melting one is pulled stretches-flatten-continuously elongated annealing one acid wash passivation one itemize, inspection, packaging continuously;
S1: take oxygen free copper 66 ~ 88 parts, 2 ~ 10 parts, zinc, 3 ~ 9 parts, aluminium, silicon 2 ~ 5 parts, 2 ~ 4 parts, manganese, plumbous 1 ~ 2 part, 0.1 ~ 0.6 part, tin, beryllium 0.2 ~ 0.3 part, chromium 0.5 ~ 0.8 part, zirconium 0.2 ~ 0.5 part, beryllium 0.4 ~ 0.9 part, 0.3 ~ 0.6 part, tungsten, all the other are impurity, carry out being mixed to get mix;
S2: the mix obtained by step S1 adds founding in smelting furnace, obtains special-shaped copper alloy metal liquid;
S3: the special-shaped copper alloy metal liquid obtained in step S2 is poured in stretcher, be provided with xenotype mold in stretcher, by be pulled and stretch, obtained special-shaped copper alloy blank;
S4, step S3 obtained special-shaped copper alloy blank and place in flaking mill and flatten operation continuously, obtain special-shaped copper alloy belt blank;
S5, step S4 is obtained special-shaped copper alloy belt blank, stretched machine at high temperature carries out the continuously elongated technique of high precision, obtained high-precision section copper alloy wire after online annealing;
S6, the high-precision section copper alloy wire of step S5 gained is carried out acid wash passivation operation, obtain high-precision section copper alloy wire finished product;
S7, by the high-precision section copper alloy wire finished product after acid wash passivation by itemize, inspection, packaging warehouse-in.
Further, in described step S2, smelting temperature is 1200 ~ 1800 DEG C, and soaking time is 2 ~ 4 hours.
Further, drawing draft temperature in described step S3 is 1000 ~ 1200 DEG C.
Further, flattening temperature continuously in described step S4 is 500 ~ 800 DEG C, and the flattening time is 10 ~ 50s.
Further, in described step S5, continuously elongated temperature is 400 ~ 450 DEG C, and stretching time is 15 ~ 45s.
Further, in described step S6 pickling, the concentration of pickle solution is between 1 ~ 7 degree.
Beneficial effect of the present invention: processing process is simple, convenient operation controls, adopt the pressworking equipment of some routines, facility investment is few, Production Flow Chart is short, low cost of manufacture, and product surface is bright and clean, precision is high, and to stretch-flattens continuously-continuously elongated annealing one acid wash passivation one itemize by melting one is pulled, inspection, packaging complete a whole set of work flow.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention includes and be prepared from by the raw material of following weight part:
Oxygen free copper 66 ~ 88 parts, 2 ~ 10 parts, zinc, 3 ~ 9 parts, aluminium, silicon 2 ~ 5 parts, 2 ~ 4 parts, manganese, plumbous 1 ~ 2 part, 0.1 ~ 0.6 part, tin, beryllium 0.2 ~ 0.3 part, chromium 0.5 ~ 0.8 part, zirconium 0.2 ~ 0.5 part, beryllium 0.4 ~ 0.9 part, 0.3 ~ 0.6 part, tungsten, all the other are impurity.
A kind of high-precision section copper alloy wire and complete processing thereof, comprising the steps:, batching one melting one is pulled stretches-flatten-continuously elongated annealing one acid wash passivation one itemize, inspection, packaging continuously;
S1: take oxygen free copper 66 ~ 88 parts, 2 ~ 10 parts, zinc, 3 ~ 9 parts, aluminium, silicon 2 ~ 5 parts, 2 ~ 4 parts, manganese, plumbous 1 ~ 2 part, 0.1 ~ 0.6 part, tin, beryllium 0.2 ~ 0.3 part, chromium 0.5 ~ 0.8 part, zirconium 0.2 ~ 0.5 part, beryllium 0.4 ~ 0.9 part, 0.3 ~ 0.6 part, tungsten, all the other are impurity, carry out being mixed to get mix;
S2: the mix obtained by step S1 adds founding in smelting furnace, obtains special-shaped copper alloy metal liquid;
S3: the special-shaped copper alloy metal liquid obtained in step S2 is poured in stretcher, be provided with xenotype mold in stretcher, by be pulled and stretch, obtained special-shaped copper alloy blank;
S4, step S3 obtained special-shaped copper alloy blank and place in flaking mill and flatten operation continuously, obtain special-shaped copper alloy belt blank;
S5, step S4 is obtained special-shaped copper alloy belt blank, stretched machine at high temperature carries out the continuously elongated technique of high precision, obtained high-precision section copper alloy wire after online annealing;
S6, the high-precision section copper alloy wire of step S5 gained is carried out acid wash passivation operation, obtain high-precision section copper alloy wire finished product;
S7, by the high-precision section copper alloy wire finished product after acid wash passivation by itemize, inspection, packaging warehouse-in.
In described step S2, smelting temperature is 1200 ~ 1800 DEG C, and soaking time is 2 ~ 4 hours.
Drawing draft temperature in described step S3 is 1000 ~ 1200 DEG C.
Flattening temperature continuously in described step S4 is 500 ~ 800 DEG C, and the flattening time is 10 ~ 50s.
In described step S5, continuously elongated temperature is 400 ~ 450 DEG C, and stretching time is 15 ~ 45s.
In described step S6 pickling, the concentration of pickle solution is between 1 ~ 7 degree.
embodiment 1:
Step a: melting one of preparing burden is pulled and stretches-flatten continuously-continuously elongated annealing one acid wash passivation one itemize, inspection, packaging;
S1: take oxygen free copper 69 parts, 5 parts, zinc, 5 parts, aluminium, silicon 3 parts, 4 parts, manganese, plumbous 2 parts, 0.4 part, tin, beryllium 0.2 part, chromium 0.6 part, zirconium 0.3 part, beryllium 0.6 part, 0.5 part, tungsten, all the other are impurity, carry out being mixed to get mix;
S2: the mix obtained by step S1 adds founding in smelting furnace, obtains special-shaped copper alloy metal liquid;
S3: the special-shaped copper alloy metal liquid obtained in step S2 is poured in stretcher, be provided with xenotype mold in stretcher, by be pulled and stretch, obtained special-shaped copper alloy blank;
S4, step S3 obtained special-shaped copper alloy blank and place in flaking mill and flatten operation continuously, obtain special-shaped copper alloy belt blank;
S5, step S4 is obtained special-shaped copper alloy belt blank, stretched machine at high temperature carries out the continuously elongated technique of high precision, obtained high-precision section copper alloy wire after online annealing;
S6, the high-precision section copper alloy wire of step S5 gained is carried out acid wash passivation operation, obtain high-precision section copper alloy wire finished product;
S7, by the high-precision section copper alloy wire finished product after acid wash passivation by itemize, inspection, packaging warehouse-in.
In described step S2, smelting temperature is 1600 DEG C, and soaking time is 3 hours.
Drawing draft temperature in described step S3 is 1100 DEG C.
Flattening temperature continuously in described step S4 is 500 ~ 800 DEG C, and the flattening time is 33s.
In described step S5, continuously elongated temperature is 444 DEG C, and stretching time is 18s.
In described step S6 pickling, the concentration of pickle solution is between 3 degree.
embodiment 2:
Step a: melting one of preparing burden is pulled and stretches-flatten continuously-continuously elongated annealing one acid wash passivation one itemize, inspection, packaging;
S1: take oxygen free copper 88 parts, 10 parts, zinc, 9 parts, aluminium, silicon 5 parts, 4 parts, manganese, plumbous 2 parts, 0.6 part, tin, beryllium 0.3 part, chromium 0.8 part, zirconium 0.5 part, beryllium 0.9 part, 0.6 part, tungsten, all the other are impurity, carry out being mixed to get mix;
S2: the mix obtained by step S1 adds founding in smelting furnace, obtains special-shaped copper alloy metal liquid;
S3: the special-shaped copper alloy metal liquid obtained in step S2 is poured in stretcher, be provided with xenotype mold in stretcher, by be pulled and stretch, obtained special-shaped copper alloy blank;
S4, step S3 obtained special-shaped copper alloy blank and place in flaking mill and flatten operation continuously, obtain special-shaped copper alloy belt blank;
S5, step S4 is obtained special-shaped copper alloy belt blank, stretched machine at high temperature carries out the continuously elongated technique of high precision, obtained high-precision section copper alloy wire after online annealing;
S6, the high-precision section copper alloy wire of step S5 gained is carried out acid wash passivation operation, obtain high-precision section copper alloy wire finished product;
S7, by the high-precision section copper alloy wire finished product after acid wash passivation by itemize, inspection, packaging warehouse-in.
In described step S2, smelting temperature is 1800 DEG C, and soaking time is 4 hours.
Drawing draft temperature in described step S3 is 1200 DEG C.
Flattening temperature continuously in described step S4 is 800 DEG C, and the flattening time is 50s.
In described step S5, continuously elongated temperature is 450 DEG C, and stretching time is 45s.
In described step S6 pickling, the concentration of pickle solution is between 7 degree.
embodiment 3:
Step a: melting one of preparing burden is pulled and stretches-flatten continuously-continuously elongated annealing one acid wash passivation one itemize, inspection, packaging;
S1: take oxygen free copper 66 parts, 2 parts, zinc, 3 parts, aluminium, silicon 2 parts, 2 parts, manganese, plumbous 1 part, 0.1 part, tin, beryllium 0.2 part, chromium 0.5 part, zirconium 0.2 part, beryllium 0.4 part, 0.3 part, tungsten, all the other are impurity, carry out being mixed to get mix;
S2: the mix obtained by step S1 adds founding in smelting furnace, obtains special-shaped copper alloy metal liquid;
S3: the special-shaped copper alloy metal liquid obtained in step S2 is poured in stretcher, be provided with xenotype mold in stretcher, by be pulled and stretch, obtained special-shaped copper alloy blank;
S4, step S3 obtained special-shaped copper alloy blank and place in flaking mill and flatten operation continuously, obtain special-shaped copper alloy belt blank;
S5, step S4 is obtained special-shaped copper alloy belt blank, stretched machine at high temperature carries out the continuously elongated technique of high precision, obtained high-precision section copper alloy wire after online annealing;
S6, the high-precision section copper alloy wire of step S5 gained is carried out acid wash passivation operation, obtain high-precision section copper alloy wire finished product;
S7, by the high-precision section copper alloy wire finished product after acid wash passivation by itemize, inspection, packaging warehouse-in.
In described step S2, smelting temperature is 1200 DEG C, and soaking time is 2 hours.
Drawing draft temperature in described step S3 is 1000 DEG C.
Flattening temperature continuously in described step S4 is 500 DEG C, and the flattening time is 10s.
In described step S5, continuously elongated temperature is 400 DEG C, and stretching time is 15s.
In described step S6 pickling, the concentration of pickle solution is between 1 degree.
Processing process of the present invention is simple, convenient operation controls, adopt the pressworking equipment of some routines, facility investment is few, Production Flow Chart is short, low cost of manufacture, and product surface is bright and clean, precision is high, and to stretch-flattens continuously-continuously elongated annealing one acid wash passivation one itemize by melting one is pulled, inspection, packaging complete a whole set of work flow.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a high-precision section copper alloy wire, is characterized in that, comprises and being prepared from by the raw material of following weight part:
Oxygen free copper 66 ~ 88 parts, 2 ~ 10 parts, zinc, 3 ~ 9 parts, aluminium, silicon 2 ~ 5 parts, 2 ~ 4 parts, manganese, plumbous 1 ~ 2 part, 0.1 ~ 0.6 part, tin, beryllium 0.2 ~ 0.3 part, chromium 0.5 ~ 0.8 part, zirconium 0.2 ~ 0.5 part, beryllium 0.4 ~ 0.9 part, 0.3 ~ 0.6 part, tungsten, all the other are impurity.
2. high-precision section copper alloy wire and a complete processing thereof, is characterized in that, comprising the steps:, batching one melting one is pulled stretches-flatten-continuously elongated annealing one acid wash passivation one itemize, inspection, packaging continuously;
S1: take oxygen free copper 66 ~ 88 parts, 2 ~ 10 parts, zinc, 3 ~ 9 parts, aluminium, silicon 2 ~ 5 parts, 2 ~ 4 parts, manganese, plumbous 1 ~ 2 part, 0.1 ~ 0.6 part, tin, beryllium 0.2 ~ 0.3 part, chromium 0.5 ~ 0.8 part, zirconium 0.2 ~ 0.5 part, beryllium 0.4 ~ 0.9 part, 0.3 ~ 0.6 part, tungsten, all the other are impurity, carry out being mixed to get mix;
S2: the mix obtained by step S1 adds founding in smelting furnace, obtains special-shaped copper alloy metal liquid;
S3: the special-shaped copper alloy metal liquid obtained in step S2 is poured in stretcher, be provided with xenotype mold in stretcher, by be pulled and stretch, obtained special-shaped copper alloy blank;
S4, step S3 obtained special-shaped copper alloy blank and place in flaking mill and flatten operation continuously, obtain special-shaped copper alloy belt blank;
S5, step S4 is obtained special-shaped copper alloy belt blank, stretched machine at high temperature carries out the continuously elongated technique of high precision, obtained high-precision section copper alloy wire after online annealing;
S6, the high-precision section copper alloy wire of step S5 gained is carried out acid wash passivation operation, obtain high-precision section copper alloy wire finished product;
S7, by the high-precision section copper alloy wire finished product after acid wash passivation by itemize, inspection, packaging warehouse-in.
3. a kind of high-precision section copper alloy wire according to claim 2 and complete processing thereof, is characterized in that, in described step S2, smelting temperature is 1200 ~ 1800 DEG C, and soaking time is 2 ~ 4 hours.
4. a kind of high-precision section copper alloy wire according to claim 2 and complete processing thereof, is characterized in that, drawing draft temperature in described step S3 is 1000 ~ 1200 DEG C.
5. a kind of high-precision section copper alloy wire according to claim 2 and complete processing thereof, is characterized in that, flattening temperature continuously in described step S4 is 500 ~ 800 DEG C, and the flattening time is 10 ~ 50s.
6. a kind of high-precision section copper alloy wire according to claim 2 and complete processing thereof, is characterized in that, in described step S5, continuously elongated temperature is 400 ~ 450 DEG C, and stretching time is 15 ~ 45s.
7. a kind of high-precision section copper alloy wire according to claim 2 and complete processing thereof, is characterized in that, in described step S6 pickling, the concentration of pickle solution is between 1 ~ 7 degree.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482939.6A CN108018458A (en) | 2015-12-02 | 2015-12-02 | copper alloy wire processing method |
| CN201510866279.6A CN105331845B (en) | 2015-12-02 | 2015-12-02 | A kind of high-precision section copper alloy wire and its processing technology |
| CN201711477700.XA CN107893173A (en) | 2015-12-02 | 2015-12-02 | Special-shaped copper alloy wire processing technology |
| CN201711482986.0A CN108165816A (en) | 2015-12-02 | 2015-12-02 | High-precision section copper alloy wire and its processing technology |
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| CN201510866279.6A CN105331845B (en) | 2015-12-02 | 2015-12-02 | A kind of high-precision section copper alloy wire and its processing technology |
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| CN201711482986.0A Division CN108165816A (en) | 2015-12-02 | 2015-12-02 | High-precision section copper alloy wire and its processing technology |
| CN201711482939.6A Division CN108018458A (en) | 2015-12-02 | 2015-12-02 | copper alloy wire processing method |
| CN201711477700.XA Division CN107893173A (en) | 2015-12-02 | 2015-12-02 | Special-shaped copper alloy wire processing technology |
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| CN105331845A true CN105331845A (en) | 2016-02-17 |
| CN105331845B CN105331845B (en) | 2018-11-27 |
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| CN201711477700.XA Pending CN107893173A (en) | 2015-12-02 | 2015-12-02 | Special-shaped copper alloy wire processing technology |
| CN201711482939.6A Pending CN108018458A (en) | 2015-12-02 | 2015-12-02 | copper alloy wire processing method |
| CN201510866279.6A Active CN105331845B (en) | 2015-12-02 | 2015-12-02 | A kind of high-precision section copper alloy wire and its processing technology |
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| CN201711477700.XA Pending CN107893173A (en) | 2015-12-02 | 2015-12-02 | Special-shaped copper alloy wire processing technology |
| CN201711482939.6A Pending CN108018458A (en) | 2015-12-02 | 2015-12-02 | copper alloy wire processing method |
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| CN106119600A (en) * | 2016-08-30 | 2016-11-16 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of environmental protection high-quality is wear-resisting and processing technique thereof |
| CN106119597A (en) * | 2016-08-30 | 2016-11-16 | 芜湖楚江合金铜材有限公司 | The different in nature copper wires of a kind of environment-friendly and high-performance and processing technique thereof |
| CN106191512A (en) * | 2016-08-30 | 2016-12-07 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of rare earth resistance to compression is the most wear-resisting and preparation method thereof |
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| CN106222481A (en) * | 2016-08-29 | 2016-12-14 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of high accuracy tensile property is high and processing technique thereof |
| CN106119600A (en) * | 2016-08-30 | 2016-11-16 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of environmental protection high-quality is wear-resisting and processing technique thereof |
| CN106119597A (en) * | 2016-08-30 | 2016-11-16 | 芜湖楚江合金铜材有限公司 | The different in nature copper wires of a kind of environment-friendly and high-performance and processing technique thereof |
| CN106191512A (en) * | 2016-08-30 | 2016-12-07 | 芜湖楚江合金铜材有限公司 | Copper alloy wire that a kind of rare earth resistance to compression is the most wear-resisting and preparation method thereof |
| CN106944493A (en) * | 2017-04-03 | 2017-07-14 | 浙江绅仕镭铜业有限公司 | A kind of processing method of extraordinary copper material |
| CN106944493B (en) * | 2017-04-03 | 2019-08-06 | 浙江绅仕镭铜业有限公司 | A kind of processing method of special type copper material |
| CN110747362A (en) * | 2019-09-09 | 2020-02-04 | 无锡一名精密铜带有限公司 | Temperature-controlled casting mold continuous casting direct forming process for copper alloy special-shaped strip |
| CN110747362B (en) * | 2019-09-09 | 2020-12-04 | 无锡一名精密铜带有限公司 | Temperature-controlled casting mold continuous casting direct forming process for copper alloy special-shaped strip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108018458A (en) | 2018-05-11 |
| CN105331845B (en) | 2018-11-27 |
| CN107893173A (en) | 2018-04-10 |
| CN108165816A (en) | 2018-06-15 |
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