CN110181136A - Tab (s) formula labyrinth valve cage mounted structure method for welding - Google Patents
Tab (s) formula labyrinth valve cage mounted structure method for welding Download PDFInfo
- Publication number
- CN110181136A CN110181136A CN201910571407.2A CN201910571407A CN110181136A CN 110181136 A CN110181136 A CN 110181136A CN 201910571407 A CN201910571407 A CN 201910571407A CN 110181136 A CN110181136 A CN 110181136A
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- China
- Prior art keywords
- tab
- matrix
- mounted structure
- temperature resistant
- resistant coating
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemically Coating (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of tab (s) formula labyrinth valve cage mounted structure method for welding, include the following steps: step 1: blasting treatment being carried out to tab (s) matrix first, then chemical nickel plating is carried out, then nano inorganic high-temperature resistant coating is smeared at the runner in tab (s), after cured, epoxy resin organic filler and/or paraffin sizing are filled into runner, and it smoothes out and is extremely aligned with tab (s) matrix, after cured, nano inorganic high-temperature resistant coating is put on epoxy resin organic filler surface again, finally brazing material is smeared in the non-flow passage area of tab (s) matrix, it is made and is pre-sintered tab (s) matrix；Step 2: pre-sintering tab (s) matrix made from step 1 being aligned layer by layer, base is added together, and is formed cage mounted structure, then stepped up with frock clamp, is then sintered.The present invention reduces sintering temperature, increases the bond strength between weldment, and runner mouth is effectively prevent to be blocked by improving above-mentioned soldering processes.
Description
Technical field
The invention belongs to valve technology fields, and in particular to a kind of tab (s) formula labyrinth valve cage mounted structure method for welding.
Background technique
The labyrinth path regulating valve that multistage labyrinth dropping valve is formed using multilayer tab (s), passes through spool and tab (s) group
The position of part adjusts the flow for flowing through the medium in valve, is increased by runner tiny in tab (s) and its frequent bending along journey
Resistance significantly reduces the pressure of high pressure gas or steam, since effective multilevel decompression makes liquid not generate gas
Erosion, and reduce the noise in pressure reduction.
Labyrinth adjusting valve is mainly made of multiple tab (s), there is the thin of many axial symmetry arrangements on the surface of each tab (s)
Small flow channels, these runners by centre bore along radially, due to the surface layout extraordinary image labyrinth of whole tab (s), so
Referred to as formula labyrinth type tab (s) valve (such as shown in Fig. 1 and Fig. 2).The design in tab (s) surface labyrinth can be according to media technology parameter not
Together, the arrangement of runner is different.
The cage structure of tab (s) composition can be formed by various ways at present, and the machine including relatively common single tab (s) adds
Work molding, then welds together, can also be locked together tab (s) by guide post, or even there are the cage structures of 3D printing；
But most of cage structure is the welding fabrication of tab (s) at present, the cage structure of 3D printing since cost is very expensive, so
That adopts is fewer, it is believed that as 3D printing equipment and its cost of raw material will further decrease from now on, the caged knot of 3D printing
Structure can be popularized further.
Although tab (s) formula welding structure cost is relatively low, and performance is also outstanding enough, and relevant moulding process is simultaneously
It is not exclusively mature.Soldering processes are usually used, are applied in tab (s) using solder, are only put on the upper surface of tab (s), do not allow stream
There is solder in road region, then, tab (s) is aligned to base layer by layer and is added together, cage structure is constituted, is fixed tab (s) with tooling, from
So air-dry, be then fed into vacuum drying oven and be sintered, reach certain control temperature and its after the time, take out cage structure and its
Tooling, disassembling fixture, cleaning.It sends to and is processed through a step later.
We there is a problem of many using the cage structure that above-mentioned common smearing and soldering processes make at present, now
Be described as follows: be first the coating smeared in tab (s) in high-temperature sintering process due to siphonage, can be easy to flow to runner
In go, finally block portion of runner mouth, if it exceeds a certain number of runner mouths be blocked or part block, product is just scrapped
?.It is exactly that the brazing property of solder and tab (s) substrate is bad there are also a kind of situation, causes the partial region of welding not firm, very
It is disengaged to entire.Another situation is exactly that firm performance is welded for enhancing, increases sintering temperature, since process temperature is excessively high,
In this case, in the sintering process of vacuum, due to having the runner much claimed and its laminar original of tab (s) itself among tab (s)
Cause, the biggish thermal stress of the generation being affected by temperature, final tab (s) surface curvature, so that tab (s) can not be sealed strictly and be made
It is unqualified at product.
Summary of the invention
The present invention is to overcome above-mentioned defect in the prior art, provides a kind of tab (s) formula labyrinth valve cage mounted structure soldering side
Method.
The technical scheme adopted by the invention is as follows: a kind of tab (s) formula labyrinth valve cage mounted structure method for welding, including walk as follows
It is rapid:
Step 1: blasting treatment being carried out to tab (s) matrix first, then carries out chemical nickel plating, then the runner in tab (s)
Place smear nano inorganic high-temperature resistant coating, after cured, into runner fill epoxy resin organic filler, and smooth out to and tab (s)
Matrix alignment, after cured, then by nano inorganic high-temperature resistant coating is put on epoxy resin organic filler surface, finally in tab (s) base
The non-flow passage area of body smears brazing material, is made and is pre-sintered tab (s) matrix；
Step 2: pre-sintering tab (s) matrix made from step 1 is aligned layer by layer, base is added together, cage mounted structure is formed, then
Stepped up with frock clamp, is then sintered；The sintering temperature is preferably 650 DEG C to 950 DEG C
Further, the chemical nickel plating chooses low-phosphorous chemical nickel plating (refer generally to phosphorus content and be less than 3.6wt%)；With/
Or, the nano inorganic high-temperature resistant coating is the inorganic coating based on nano silica.Chemical nickel plating is chosen low-phosphorous as far as possible
Nickel plating mode, one side surface hardness can reduce, and secondly the purity is high of nickel surface, facilitates the wetting property of solder.Nanometer
Refractory inorganic paint is inorganic coating (the i.e. nano silica in nano inorganic high-temperature resistant coating based on nano silica
Content is greater than 85wt%), it is i.e. curable under room temperature, and high temperature resistant secluding film can be formed at high temperature, generate very strong isolation layer.
Further, the film forming thickness of the nano inorganic high-temperature resistant coating is 10~20 microns；And/or the chemical nickel plating is formed
Coating film thickness be 5~10 microns；And/or the brazing material smearing thickness is 20~30 microns.
In sintering process, the organic filler material of epoxy resin starts to volatilize at 200 degree or so, by tab (s) runner mouth tab (s) inner hole
3 and its circle end face at shed.Resin filling materials in runner mouth help to create entity structure, prevent solder from entering stream
Road, while pressure is generated when 200 degree or so volatilizations, reinforce the closure to solder, nano inorganic high-temperature resistant coating forms at this time
Obturator completely cuts off solder outside the runner 2 in tab (s).Sintering temperature continues growing at this time, reaches 800 degree or so, solder starts
Fusing, there is also so solder cannot be introduced into runner mouth to nano inorganic high-temperature resistant coating always always at this time.
Technical effect obtained by the present invention are as follows: (1) nano inorganic high-temperature resistant coating film can have high-temperature stability, and at
Film ability plays plugging action after soldering flux fusing, prevents soldering flux from flowing into runner；(2) epoxy resin in runner is filled out
It fills material and helps to create entity structure, prevent solder from entering runner；(3) nano inorganic high-temperature resistant coating is put on epoxy resin and has
Above machine filler material, which can form glue connection coating with nano inorganic high-temperature resistant coating before, and
The organic filler material of epoxy resin is completely enclosed in nano inorganic high-temperature resistant coating film；(4) the epoxy resin filling in runner
Pressure is generated when 200 degree of material or so volatilizations, reinforces the closure to solder；(5) tab (s) plating nickel on surface film, increase and brazing material
Wetting property, improve the adhesive force of soldering, increase selectable soldering type, reduce brazing temperature；(6) tab (s) plating nickel on surface
Film also adds selectable soldering type, reduces brazing temperature, reduces thermal stress, reduces deformation.The present invention passes through in improvement
Soldering processes are stated, sintering temperature is reduced, increase the bond strength between weldment, and runner mouth is effectively prevent to be blocked.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the labyrinth valve cage mounted structural schematic diagram of the multilayer tab (s) composition in background technique.
Fig. 2 is the left view diagram of Fig. 1.
In figure: 1. tab (s) matrixes, the runner in 2. tab (s), 3. tab (s) inner holes.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.
To tab (s) matrix 1, (basis material of tab (s) is usually 316 stainless steels, or other alloy steel products, originally first
Embodiment selects 316 stainless steels) blasting treatment is carried out, facilitate to increase face of weld product in this way.Secondly to the table of tab (s) matrix 1
Face carries out chemical nickel plating processing, and coating film thickness is 10 microns.Chemical nickel plating chooses low-phosphorous nickel plating mode, one side surface as far as possible
Hardness can reduce, and secondly the purity is high of nickel surface, facilitates the wetting property of solder.Chemical nickel plating can improve tab (s) matrix 1
With the wellability of solder, brazing area infiltration can be made complete, while adhesive force increases, and based on silver, copper solder
A variety of solders all have preferably soldering effect with nickel plating modified surface, while when choosing cored solder, have more selections empty
Between, it can choose low-temperature brazing filler metal, the temperature of soldering be greatly lowered, prevent tab (s) in this way because temperature is excessively high, cause thermal stress
Greatly, the deformation of tab (s) matrix 1 caused by.After chemical nickel plating, nano inorganic high-temperature resistant coating is smeared at the runner 2 in tab (s),
The coating is the inorganic coating based on nano silica, and film forming thickness is 10 microns, i.e. curable under room temperature, in high temperature
Lower formation high temperature resistant secluding film, generates very strong isolation layer.Since plated film and nano paint are 10 microns to the stream in tab (s)
2 flow characteristics of road are without influence.Nano inorganic high-temperature resistant coating room temperature lower half an hour is i.e. curable, has epoxy resin after solidification
Machine filler material is inserted in the runner 2 in tab (s), and is smoothed out, with the upper and lower surface of tab (s) matrix 1 and inside and outside to it).
After solidification, then nano inorganic high-temperature resistant coating is put on above the organic filler material of epoxy resin, which can be with coating before
Glue connection coating is formed, the organic filler material of epoxy resin is completely enclosed in nano inorganic high-temperature resistant coating film.Finally in tab (s)
The non-flow passage area of matrix 1 smears brazing material, smears 20 microns thickness, tab (s) matrix 1 is allowed to be aligned layer by layer, base is added in one
It rises, forms cage structure, stepped up with frock clamp, prepare sintering.
In sintering process, first by preheating temperature to sintering temperature, preheating method is to be increased to temperature linearly by 200 DEG C
500 DEG C, then sintering temperature is controlled at 500 DEG C~950 DEG C, sintering time 30~120 minutes.Sintering temperature and sintering time
Specifically 650 DEG C can be can be used hereinafter, greater than DN50 size 700 less than DN50 size depending on part dimension difference
DEG C or so, thickness is less than the product of 4mm, and 50 minutes time, the time increased hereinafter, greater than 4mm.After sintering, it is natural with
Furnace is cooling.
The organic filler material of epoxy resin starts to volatilize at 200 DEG C or so, by tab (s) runner mouth tab (s) inner hole 3 and its outer nose circle
It sheds at face, shown in the wicket shown such as the cage structure of attached drawing 1.Resin filling materials in runner help to create entity
Structure prevents solder from entering runner, while generating pressure when 200 DEG C or so volatilizations, reinforces the closure to solder, at this time nanometer nothing
The obturator of machine high-temperature resistant coating composition completely cuts off solder outside the runner 2 in tab (s).Sintering temperature continues growing at this time, reaches
800 DEG C or so, solder starts to melt, and there is also so solder cannot be introduced into nano inorganic high-temperature resistant coating always always at this time
Runner mouth.
In the present embodiment chemical plating nickel technology be market common technology, i.e., with nickel sulfate, sodium citrate, sodium hypophosphite,
Chemical plating fluid based on sodium acetate etc., operation temperature: 80~90 DEG C of progress chemical platings, reaction time are subject to thickness of coating.
Nano inorganic high-temperature resistant coating using Guangzhou also take in the fresh material Science and Technology Ltd. production GN-205A-A nano coating, solder flux
HJAg-X high-quality using the production of Hunan new ring of light development in science and technology Co., Ltd contains sliver soldering paste.Filler also can be used on the market
Common fusible pattern paraffin.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of tab (s) formula labyrinth valve cage mounted structure method for welding, characterized by the following steps:
Step 1: blasting treatment being carried out to tab (s) matrix (1) first, then carries out chemical nickel plating, then the runner in tab (s)
(2) nano inorganic high-temperature resistant coating is smeared at, after cured, filling epoxy resin organic filler and/or paraffin in Xiang Liudao (2)
Nano inorganic high-temperature resistant coating after cured, then is put on epoxy resin and had by filler, and smoothing out to being aligned with tab (s) matrix (1)
Machine filler surface finally smears brazing material in the non-flow passage area of tab (s) matrix (1), is made and is pre-sintered tab (s) matrix；
Step 2: pre-sintering tab (s) matrix made from step 1 being aligned layer by layer, base is added together, and forms cage mounted structure, then recruitment
Clamps are stepped up, and are then sintered.
2. tab (s) formula labyrinth valve cage mounted structure method for welding according to claim 1, it is characterised in that: the chemical nickel plating
Choose low-phosphorous chemical nickel plating；And/or nanometer titanium dioxide silicone content is greater than 85wt% in the nano inorganic high-temperature resistant coating.
3. tab (s) formula labyrinth valve cage mounted structure method for welding according to claim 1, it is characterised in that: the nano inorganic
The film forming thickness of high-temperature resistant coating is 10~20 microns；And/or the coating film thickness that the chemical nickel plating is formed is 5~10 microns；
And/or the brazing material smearing thickness is 20~30 microns.
4. tab (s) formula labyrinth valve cage mounted structure method for welding according to claim 1, it is characterised in that: described in step 2
Sintering temperature is 650 DEG C to 950 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910571407.2A CN110181136B (en) | 2019-06-28 | 2019-06-28 | Brazing method for butterfly piece type labyrinth valve cage installation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910571407.2A CN110181136B (en) | 2019-06-28 | 2019-06-28 | Brazing method for butterfly piece type labyrinth valve cage installation structure |
Publications (2)
| Publication Number | Publication Date |
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| CN110181136A true CN110181136A (en) | 2019-08-30 |
| CN110181136B CN110181136B (en) | 2021-08-10 |
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| CN201910571407.2A Active CN110181136B (en) | 2019-06-28 | 2019-06-28 | Brazing method for butterfly piece type labyrinth valve cage installation structure |
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