CN108754559A - A kind of galvanized method of spring - Google Patents
A kind of galvanized method of spring Download PDFInfo
- Publication number
- CN108754559A CN108754559A CN201810515467.8A CN201810515467A CN108754559A CN 108754559 A CN108754559 A CN 108754559A CN 201810515467 A CN201810515467 A CN 201810515467A CN 108754559 A CN108754559 A CN 108754559A
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- Prior art keywords
- spring
- zinc
- plated
- jig
- light extraction
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/06—Extraction of hydrogen
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
- C23C28/3225—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only with at least one zinc-based layer
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/52—After-treatment of electroplated surfaces by brightening or burnishing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a kind of galvanized methods of spring, include the following steps：1) spring is put, spring is put on zinc-plated jig, zinc-plated jig is being attached on zinc-plated transmission device；2) chemical degreasing；3) electrolytic degreasing；4) alkali neutralization；5) zincate is electroplated；6) dust technology light extraction；7) high temperature timing dehydrogenation；8) dust technology light extraction again；9) passivation coloring；10) hot water is closed；11) drying is toasted.A kind of galvanized method of spring provided by the present invention, spring will not be intertwined in galvanizing process, reduce the probability of mechanical damage, the problem of reducing the local plating leakage zinc of spring, improve zinc-plated quality.Compared to the period that traditional plating mode shortens one times or more, the good hypotonic hydrogen that do not generate heat of consumption improves zinc-plated efficiency, saves the energy.
Description
Technical field
The present invention relates to electroplating technology, more particularly to a kind of galvanized method of spring.
Background technology
The purpose of electrogalvanizing is that steel type objects are corroded in order to prevent, improves the corrosion resistance and service life of steel, simultaneously
Also product is made to increase decorative appearance, steel can be by weathering, water or soil corrosion with the growth of time.It is domestic rotten every year
The steel of erosion almost accounts for 1/10th of entire steel amount, so, in order to protect the service life of steel or its part, generally
All using electrogalvanizing by steel working process.
The zinc-plated mode of conventional springs is that spring is placed in the jig of drum-type, is easy during roller rotation is zinc-plated
There is spring wrap, mechanical damage, the product proportion of goods damageds are high, product partially or fully plating leakage, and the Cu-W ore deposit on conductive copper wire causes
Product blacks, and product oozes hydrogen phenomenon and seriously easily causes spring to be broken in actual use, and yield is low, energy consumption great Yi fevers and raw
It is long to produce the period.
Invention content
It is that spring is placed in the jig of drum-type for the zinc-plated mode of above-mentioned existing conventional springs, rotates and plate in roller
Spring wrap is susceptible to during zinc, mechanical damage, the product proportion of goods damageds are high, product partially or fully plating leakage, conductive copper wire
On Cu-W ore deposit cause product to black, product oozes hydrogen phenomenon and seriously easily causes spring to be broken in actual use, and yield is low, energy
The problems such as consuming great Yi fevers and long production cycle, the technical problem to be solved in the present invention is to provide a kind of galvanized methods of spring.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
1, a kind of galvanized method of spring, including electroplating bath, steps are as follows：
1) spring, is put, spring is put on zinc-plated jig, zinc-plated jig is being attached on zinc-plated transmission device.
2), chemical degreasing makes grease be detached from from spring surface, becomes soluble substance by degreasing agent, or be emulsified,
Uniformly and stably dispersion is present in tank liquor.
3), electrolytic degreasing is put into spring in electrolytic solution, and logical upper direct current carries out electrolysis processing, to reach degreasing
Purpose after electrolytic degreasing and is cleaned, and pickling is carried out using dilute hydrochloric acid after cleaning, and pickling needs to clean again.
4), alkali neutralization makes the surface of spring keep alkalinity, prevents from being electroplated acid-base neutralization is carried out in carry out alkaline solution
Spring gets rusty before.
5), zincate is electroplated, and spring is put into the solution for configuring solution with Zn, NaOH and zinc-plating additive, is led to straight
Galvanic electricity is electroplated, and one layer of metallic zinc is plated on the surface of spring, to increase the corrosion resistance and dicoration of spring, it is zinc-plated after simultaneously
It is cleaned.
6), dust technology light extraction, it is zinc-plated after spring be put into dust technology, by nitric acid make it is zinc-plated after spring surface generate
Alkaline oxygenated film layer get rid of.It is cleaned after light extraction, mechanical dehydration is carried out after cleaning.
7), high temperature timing dehydrogenation removes the hydrogen ion penetrated into spring by high temperature, prevents spring from asking for hydrogen embrittlement occur
It inscribes, is cooled down after dehydrogenation.
8), dust technology light extraction again, the spring after dehydrogenation are put into dust technology, and the spring surface after dehydrogenation is made by nitric acid
The oxidation film layer of generation is got rid of.It is cleaned after light extraction.
9), passivation coloring, spring surface generate it is a kind of it is very thin, fine and close, covering performance is good, inhales securely
Attached passivating film on the metal surface reduces the possibility that spring is corroded.It is cleaned after passivation coloring.
10), hot water is closed, and the corrosion resistance epithelium generated after being passivated for aging improves corrosion stability, and increases beauty,
Mechanical dehydration is carried out after hot water closing.
11) drying, is toasted, carries out baking drying after mechanical dehydration, then test package.
The preferred embodiment of said program is：The transmission device includes transmission driving and transmission track, the transmission driving
Both sides be provided with transmission track, the zinc-plated jig is placed on the copper conducting rod of transmission driving, the copper conducting rod
It connects with being arranged on the conduction copper base that electroplating bath surrounding has DC power supply and is connected with zinc-plated jig, put by transmission track handle
It is carried out on spring transport galvanized wire in insulation frame zinc-plated.
The preferred embodiment of said program is：The zinc-plated jig includes braced frame, is provided between the braced frame
Metallic rod is connected, is provided with insulation frame in the connection metallic rod, the braced frame is connected with copper conducting rod, by exhausted
Edge frame places spring, so that the spring will not be intertwined.
The preferred embodiment of said program is：The connection metallic rod is arranged along the inner wall of insulation frame, the insulation frame
It is also placed with several metal strips on inner wall and is connected with metallic rod is connect, it is entirely to charge to make the region of entire insulation frame
, so that spring is carried out under power zinc-plated.
The preferred embodiment of said program is：It removes and copper conducting rod and connect metallic rod and be connected in the braced frame surface
Part, remaining is coated with insulating materials.
The preferred embodiment of said program is：Mobile cavity is provided in the braced frame, the connection metallic rod setting exists
On mobile cavity, connection metallic rod is enable to move in a certain range, drives spring to roll to enable the insulation frame move, increase
Add zinc-plated effect.
Advantageous effect：A kind of galvanized method of spring of the present invention is placed on spring in insulation frame, is hit by a bullet in galvanizing process
Spring will not be intertwined, and reduce the probability of mechanical damage, the problem of reducing the local plating leakage zinc of spring, improve zinc-plated
Quality.Compared to the period that traditional plating mode shortens one times or more, the good hypotonic hydrogen that do not generate heat of consumption improves zinc-plated efficiency,
Save the energy.
Description of the drawings
Fig. 1 is the structural schematic diagram of zinc-plated jig in the present invention；
Fig. 2 is the vertical view of insulation frame in the present invention.
In figure：The copper conducting rods of 1-, 2- transmission tracks, 3- braced frames, 4- connection metallic rods, 5- insulation frames,
6- mobile cavities, 7- metal strips.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.Many details are elaborated in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of violating intension of the present invention, therefore the present invention is not limited by following public specific embodiment.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
A kind of galvanized method of spring of the present embodiment, including electroplating bath, steps are as follows：
1) spring, is put, spring is put on zinc-plated jig, zinc-plated jig is being attached on zinc-plated transmission device.
2), chemical degreasing makes grease be detached from from spring surface, becomes soluble substance by degreasing agent, or be emulsified,
Uniformly and stably dispersion is present in tank liquor.
3), electrolytic degreasing is put into spring in electrolytic solution, and logical upper direct current carries out electrolysis processing, to reach degreasing
Purpose after electrolytic degreasing and is cleaned, and pickling is carried out using dilute hydrochloric acid after cleaning, and pickling needs to clean again.
4), alkali neutralization makes the surface of spring keep alkalinity, prevents from being electroplated acid-base neutralization is carried out in carry out alkaline solution
Spring gets rusty before.
5), zincate is electroplated, and spring is put into the solution for configuring solution with Zn, NaOH and zinc-plating additive, is led to straight
Galvanic electricity is electroplated, and one layer of metallic zinc is plated on the surface of spring, to increase the corrosion resistance and dicoration of spring, it is zinc-plated after simultaneously
It is cleaned.
6), dust technology light extraction, it is zinc-plated after spring be put into dust technology, by nitric acid make it is zinc-plated after spring surface generate
Alkaline oxygenated film layer get rid of.It is cleaned after light extraction, mechanical dehydration is carried out after cleaning.
7), high temperature timing dehydrogenation removes the hydrogen ion penetrated into spring by high temperature, prevents spring from asking for hydrogen embrittlement occur
It inscribes, is cooled down after dehydrogenation.
8), dust technology light extraction again, the spring after dehydrogenation are put into dust technology, and the spring surface after dehydrogenation is made by nitric acid
The oxidation film layer of generation is got rid of.It is cleaned after light extraction.
9), passivation coloring, spring surface generate it is a kind of it is very thin, fine and close, covering performance is good, inhales securely
Attached passivating film on the metal surface reduces the possibility that spring is corroded.It is cleaned after passivation coloring.
10), hot water is closed, and the corrosion resistance epithelium generated after being passivated for aging improves corrosion stability, and increases beauty,
Mechanical dehydration is carried out after hot water closing.
11) drying, is toasted, carries out baking drying after mechanical dehydration, then test package.
Wherein, transmission device includes that transmission driving and transmission track 2, the both sides for transmitting driving are provided with transmission track 2, is plated
Zinc jig is placed on the copper conducting rod 1 of transmission driving, copper conducting rod 1 and is arranged and has DC power supply in electroplating bath surrounding
It connects on conduction copper base and is connected with zinc-plated jig, transported on galvanized wire by 2 springs being placed in insulation frame 5 of transmission track
It carries out zinc-plated.
As described in Fig. 1,2, zinc-plated jig includes braced frame 3, and connection metallic rod 4, connection are provided between braced frame 3
Insulation frame 5 is provided in metallic rod 4, braced frame 3 is connected with copper conducting rod 1, places spring by insulating frame 5, makes
Spring will not be intertwined.
It connects metallic rod 4 to arrange along the inner wall of insulation frame, several metal strips 7 is also placed on the inner wall for the frame 5 that insulate
And be connected with metallic rod 4 is connect, it is entirely to charge to make the region of entire insulation frame 5, enables spring in the work of electric power
It is carried out under zinc-plated.
3 surface of braced frame removes and copper conducting rod 1 and connect the part that metallic rod 4 is connected, remaining is coated with insulation
Material.
Mobile cavity 6 is provided in braced frame 3, connection metallic rod 4 is arranged on mobile cavity, and connection metallic rod 4 is enable to exist
It is moved in a certain range, drives spring to roll to enable the insulation frame 5 move, increase zinc-plated effect.
From the above mentioned, invention achieves following technique effects：Spring will not be intertwined in galvanizing process, reduce
The probability of mechanical damage, improves zinc-plated quality at the problem of reducing the local plating leakage zinc of spring.Compared to traditional plating mode
Shorten one times or more of period, the good hypotonic hydrogen that do not generate heat of consumption improves zinc-plated efficiency, saves the energy.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of galvanized method of spring, including electroplating bath, which is characterized in that steps are as follows：
1) spring, is put, spring is put on zinc-plated jig, zinc-plated jig is being attached on zinc-plated transmission device.
2), chemical degreasing makes grease be detached from from spring surface, becomes soluble substance, or be emulsified, uniformly by degreasing agent
Steadily dispersion is present in tank liquor.
3), electrolytic degreasing is put into spring in electrolytic solution, and logical upper direct current carries out electrolysis processing, to achieve the purpose that degreasing,
It after electrolytic degreasing and is cleaned, pickling is carried out using dilute hydrochloric acid after cleaning, pickling needs to clean again.
4), alkali neutralization makes the surface of spring keep alkalinity, before preventing plating acid-base neutralization is carried out in carry out alkaline solution
Spring gets rusty.
5), zincate is electroplated, and spring is put into the solution for configuring solution with Zn, NaOH and zinc-plating additive, direct current is led to
It is electroplated, plate one layer of metallic zinc on the surface of spring after zinc-plated and carries out to increase the corrosion resistance and dicoration of spring
Cleaning.
6), dust technology light extraction, it is zinc-plated after spring be put into dust technology, by nitric acid make it is zinc-plated after spring surface generate alkali
Property oxidation film layer is got rid of.It is cleaned after light extraction, mechanical dehydration is carried out after cleaning.
7), high temperature timing dehydrogenation is removed the hydrogen ion penetrated into spring by high temperature, prevents spring from the problem of hydrogen embrittlement occur,
It is cooled down after dehydrogenation.
8), dust technology light extraction again, the spring after dehydrogenation are put into dust technology, generate the spring surface after dehydrogenation by nitric acid
Oxidation film layer get rid of.It is cleaned after light extraction.
9), passivation coloring, spring surface generate it is a kind of it is very thin, fine and close, covering performance is good, is firmly adsorbed on
Passivating film on metal surface reduces the possibility that spring is corroded.It is cleaned after passivation coloring.
10), hot water is closed, and the corrosion resistance epithelium generated after being passivated for aging improves corrosion stability, and increases beauty, hot water
Mechanical dehydration is carried out after closing.
11) drying, is toasted, carries out baking drying after mechanical dehydration, then test package.
2. a kind of galvanized method of spring according to right 1, which is characterized in that the transmission device include transmission driving and
The both sides of transmission track, the transmission driving are provided with transmission track, and the zinc-plated jig is placed on copper the leading of transmission driving
On electric pole, the copper conducting rod and be arranged on the conduction copper base that electroplating bath surrounding has DC power supply connection and with zinc-plated jig
Conducting.
3. a kind of galvanized method of spring according to right 1, which is characterized in that the zinc-plated jig includes braced frame,
Be provided with connection metallic rod between the braced frame, be provided with insulation frame in the connection metallic rod, the braced frame with
Copper conducting rod is connected.
4. a kind of galvanized method of spring according to right 3, which is characterized in that the connection metallic rod is along insulation frame
Inner wall is arranged, and is also placed with several metal strips on the inner wall of the insulation frame and is connected with metallic rod is connect.
5. a kind of galvanized method of spring according to right 3, which is characterized in that remove and led with copper in the braced frame surface
The part that electric pole is connected with connection metallic rod, remaining is coated with insulating materials.
6. a kind of galvanized method of spring according to right 3, which is characterized in that be provided with movement in the braced frame
Chamber, the connection metallic rod are arranged on mobile cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810515467.8A CN108754559A (en) | 2018-05-25 | 2018-05-25 | A kind of galvanized method of spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810515467.8A CN108754559A (en) | 2018-05-25 | 2018-05-25 | A kind of galvanized method of spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108754559A true CN108754559A (en) | 2018-11-06 |
Family
ID=64006708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810515467.8A Withdrawn CN108754559A (en) | 2018-05-25 | 2018-05-25 | A kind of galvanized method of spring |
Country Status (1)
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| CN (1) | CN108754559A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979388A (en) * | 2020-07-28 | 2020-11-24 | 常州龙腾光热科技股份有限公司 | Manufacturing method of 65Mn spring plate of trough type solar heat collector |
| CN115233280A (en) * | 2022-09-23 | 2022-10-25 | 南京迅阳信息技术有限公司 | Efficient spring finish machining device |
-
2018
- 2018-05-25 CN CN201810515467.8A patent/CN108754559A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979388A (en) * | 2020-07-28 | 2020-11-24 | 常州龙腾光热科技股份有限公司 | Manufacturing method of 65Mn spring plate of trough type solar heat collector |
| CN115233280A (en) * | 2022-09-23 | 2022-10-25 | 南京迅阳信息技术有限公司 | Efficient spring finish machining device |
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Application publication date: 20181106 |