CN105619024A - Manufacturing method for stainless steel valve element - Google Patents
Manufacturing method for stainless steel valve element Download PDFInfo
- Publication number
- CN105619024A CN105619024A CN201510108737.XA CN201510108737A CN105619024A CN 105619024 A CN105619024 A CN 105619024A CN 201510108737 A CN201510108737 A CN 201510108737A CN 105619024 A CN105619024 A CN 105619024A
- Authority
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- Prior art keywords
- main body
- stainless steel
- stainless
- rustless steel
- handle
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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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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 63
- 239000010935 stainless steel Substances 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000004381 surface treatment Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 58
- 239000010959 steel Substances 0.000 claims description 58
- 238000004080 punching Methods 0.000 claims description 42
- 239000000758 substrate Substances 0.000 claims description 36
- 230000013011 mating Effects 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000009966 trimming Methods 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- -1 and therefore Substances 0.000 abstract 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 238000005495 investment casting Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
Abstract
The invention relates to a manufacturing method for a stainless steel valve element. The manufacturing method comprises the following steps: a, manufacturing a stainless steel hexagonal main body; b, manufacturing a stainless steel circular tube main body; c, manufacturing a stainless steel handle, d, carrying out surface treatment; and e, assembling. The manufacturing method for the stainless steel valve element provided by the invention solves the technical problems that current copper for a water faucet and an angle-valve valve element is high in precision casting and manufacturing cost, is low in production benefit, is complex in production process, is unstable in product quality, is high in product heavy metal content and is harmful to a human body. According to the manufacturing method for the stainless steel valve element, the conventional manufacturing process is changed, and important parts are manufactured by stamping, so that the manufacturing method has the following advantages: firstly, materials are greatly saved, and the manufacturing cost of the valve element is reduced; secondly, the processing process is simple, the production speed is increased, and the production benefits are improved; and thirdly, the important parts are manufactured by SUS304 stainless steel, and therefore, products obtained by processing are attractive in appearance, are lead-free and environmentally-friendly, and are harmless to a human body.
Description
Technical field
The present invention relates to the manufacture method of a kind of spool, in particular, the present invention relates to the manufacture method of a kind of rustless steel spool being applied to mechanical engineering field.
Background technology
Spool is that valve body moves the spool parts realizing the basic functions such as direction controlling, Stress control or flow-control by it. Spool is used widely in modern society, particularly in faucet, angle valve, fire protection pipeline and water heating pipe fittings technical field. Existing spool has many types, is broadly divided into plastic cement spool, copper spool, cast iron spool etc., and rustless steel spool Application comparison under existence conditions is few.
Prior art spool great majority adopt plastics, copper, cast iron etc. as raw material, prepare product content of beary metal high, not environmentally, harmful, and service life is also too short. Therefore, a lot of production firms adopt fine casting method to manufacture spool, but it exists following defect: 1 complex process, processing method are loaded down with trivial details; 2 raw materials use many, cause that production cost increases; 3 process velocities are relatively slow, and productivity effect is low, is unfavorable for that persistence is processed; 4 product quality difficulties control, and defective products rate is high.
Summary of the invention
First purpose of the present invention is in that, it is provided that the manufacture method of a kind of rustless steel spool, solves the technical problem that product content of beary metal is high, environmental-protecting performance is poor, harmful, service life is not high.
Second purpose of the present invention is in that, it is provided that the manufacture method of a kind of rustless steel spool, and solution complex manufacturing, processing method are loaded down with trivial details, raw material uses the technical problem many, production cost is high.
3rd purpose of the present invention is in that, it is provided that the manufacture method of a kind of rustless steel spool, solve that process velocity is slow, productivity effect is low, the difficult control of product quality, technical problem that defective products rate is high.
The above-mentioned purpose of the present invention and other purposes solve by the following technical programs:
The present invention provides the manufacture method of a kind of rustless steel spool, it is characterised in that comprise the following steps:
(1) rustless steel hexagonal main body (1) is made
1. use sawing machine by raw material stainless pipe surface trimming, obtain needing the stainless pipe of length dimension;
2. by the stainless pipe of 1. middle well cutting, use punch press mating mold once cold pier punch forming indent round platform rank, inner via hole and outer-hexagonal boss, obtain base substrate part;
3. in 2., obtain base substrate part, use automatic lathe once to complete the outer tooth of car system and groove, obtain rustless steel hexagonal main body (1);
(2) stainless pipe main body (2) is made
1. use automatic lathe by raw material stainless pipe surface trimming, obtain needing the stainless pipe of length dimension;
2. by the stainless pipe of 1. middle well cutting, square groove in the punching press of punch press mating mold is used;
3. by base substrate part good for 2. middle punching press, punching press square hole of punch press mating mold is used;
4. by base substrate part good for 3. middle punching press, use stamped female bud of punch press mating mold, obtain the stainless pipe with interior square groove, square hole and recessed bud, obtain stainless pipe main body (2);
(3) stainless steel handle (3) is made
1. use sawing machine by raw material stainless steel round bar surface trimming, obtain needing the stainless steel round bar of length dimension;
2. by the stainless steel round bar of 1. middle well cutting, use the once cold pier punch forming of punch press mating mold to become big blank leading portion, obtain the base substrate part needed;
3. by base substrate part good for 2. middle punching press, use automatic lathe to be once automatically performed car groove, boring, tapping, obtain the base substrate part needed;
4. by base substrate part good for 3. middle car, use punching press handle rear end spline tooth of punch press mating mold, obtain the base substrate part needed;
5. by base substrate part good for 4. middle punching press, use the punching press of punch press mating mold to flatten handle front end, obtain the base substrate part needed;
6. by base substrate part good for 5. middle punching press, use room, milling good handle front end of CNC milling machine, complete to make stainless steel handle;
(4) surface treatment
The part rustless steel hexagonal main body obtained in (1), (2), (3) step, stainless pipe main body, stainless steel handle are put in full automatic polishing machine, it is polished, after deburring, obtains fabricated part rustless steel hexagonal main body, stainless pipe main body, stainless steel handle;
(5) assemble
The recessed bud end of fabricated part stainless pipe main body is inwardly inserted in the interior round recessed of rustless steel hexagonal main body, stainless steel handle is put sealing ring and rubber sheet gasket again, the band spline increment making stainless steel handle outwards penetrates in rustless steel hexagonal main body, is then sequentially loaded into potsherd, silica gel pad in stainless pipe main body;
Hand assembled completes, and obtains finished product rustless steel spool.
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that it is cold pier diel that described step (1) makes in rustless steel hexagonal main body mould 2..
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that it is notching die that described step (2) makes in stainless pipe main body mould 2..
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that it is punching die that described step (2) makes in stainless pipe main body mould 3..
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that described (2) make in stainless pipe main body mould 4. is stamped female bud mould.
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that it is cold pier punch-forming mold that described step (3) makes in spool stainless steel handle mould 2..
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that it is punching press spline tooth mould that described step (3) makes in spool stainless steel handle mould 4..
The manufacture method of a kind of rustless steel spool provided by the invention, it is preferable that it is punching press handle mold that described step (3) makes in spool stainless steel handle mould 5..
Advantages of the present invention and having the beneficial effects that:
1. the present invention provides the manufacture method of a kind of rustless steel spool, and the speed of processing method is fast, dramatically saves on raw material, reduces production cost, and production efficiency is high, and can better ensure that the quality of product, and yield rate is higher.
2. the manufacture method of a kind of rustless steel spool provided by the invention, changes traditional manufacturing process, and the important composition parts in spool all adopt punching press to complete, ensure that integration processing, improve productivity effect, correspondingly saved cost, it is ensured that the assembly relation better of each parts.
Accompanying drawing explanation
Carry out describing in detail or preferably to the preferred embodiment of the present invention below in conjunction with accompanying drawing, wherein,
Fig. 1 is the front view of stainless pipe in rustless steel hexagonal subject process;
Fig. 2 is the front view of the stainless pipe in rustless steel hexagonal subject process with indent round platform rank, inner via hole, outer-hexagonal boss;
Fig. 3 is the front view of rustless steel hexagonal main body;
Fig. 4 is the front view of the stainless pipe in stainless pipe subject process;
Fig. 5 is the front view of the stainless pipe with interior square groove in stainless pipe subject process;
Fig. 6 is the front view of the stainless pipe in stainless pipe subject process with square hole;
Fig. 7 is the top view of the stainless pipe in stainless pipe subject process with square hole;
Fig. 8 is the front view of stainless pipe main body;
Fig. 9 is the top view of stainless pipe main body;
Figure 10 is the front view of the stainless steel round bar in the stainless steel handle course of processing;
Figure 11 is the front view in the stainless steel handle course of processing with the stainless steel round bar becoming big blank leading portion;
Figure 12 is the front view having reeded stainless steel round bar in the stainless steel handle course of processing;
Figure 13 is the stainless steel round bar front view in the stainless steel handle course of processing with spline tooth;
Figure 14 is the front view in the stainless steel handle course of processing with the stainless steel round bar flattening handle;
Figure 15 is the top view in the stainless steel handle course of processing with the stainless steel round bar flattening handle;
Figure 16 is the front view of stainless steel handle;
Figure 17 is the top view of stainless steel handle;
Figure 18 is the assembling structural representation of rustless steel spool;
Figure 19 is the cold pier punching die structure schematic diagram of rustless steel hexagonal main body;
Figure 20 is stainless pipe main body notching die structural representation;
Figure 21 is stainless pipe main body punching die structure schematic diagram;
Figure 22 is stainless pipe main body stamped female bud mould structure schematic diagram;
Figure 23 is the cold pier impact molding die structure schematic diagram of stainless steel handle;
Figure 24 is stainless steel handle punching press spline tooth mould structure schematic diagram;
Figure 25 is stainless steel handle punching press handle mold structural representation;
Rustless steel hexagonal main body-1, stainless pipe main body-2, stainless steel handle-3.
Detailed description of the invention
According to technical scheme, when not changing the connotation of the present invention, those of ordinary skill in the art can propose multiple frame modes of the present invention. Therefore detailed description below and accompanying drawing are illustrating technical scheme, and are not to be construed as the whole of the present invention or are considered as defining or limiting technical solution of the present invention.
With reference to accompanying drawing, the present invention provides the manufacture method of a kind of rustless steel spool, it is characterised in that this technique comprises the following steps, particularly as follows:
With reference to accompanying drawing 1-3, use sawing machine blanking, make rustless steel hexagonal main body 1.
1. use sawing machine by raw material stainless pipe surface trimming, obtain needing the stainless pipe of length dimension.
2. by the stainless pipe of 1. middle well cutting, use punch press mating mold once cold pier punch forming indent round platform rank, inner via hole and outer-hexagonal boss, obtain base substrate part.
3. in 2., obtain base substrate part, use automatic lathe once to complete the outer tooth of car system and groove, obtain rustless steel hexagonal main body 1.
With reference to accompanying drawing 4-9, use lathe blanking, make stainless pipe main body 2.
1. use automatic lathe by raw material stainless pipe surface trimming, obtain needing the stainless pipe of length dimension.
2. by the stainless pipe of 1. middle well cutting, square groove in the punching press of punch press mating mold is used.
3. by base substrate part good for 2. middle punching press, punching press square hole of punch press mating mold is used.
4. by base substrate part good for 3. middle punching press, use stamped female bud of punch press mating mold, obtain stainless pipe main body 2.
With reference to accompanying drawing 10-17, use sawing machine to cut off raw material, make stainless steel handle 3.
1. use sawing machine by raw material stainless steel round bar surface trimming, obtain needing the stainless steel round bar of length dimension.
2. by the stainless steel round bar of 1. middle well cutting, use the once cold pier punch forming of punch press mating mold to become big blank leading portion, obtain the base substrate part needed.
3. by base substrate part good for 2. middle punching press, use automatic lathe to be once automatically performed car groove, boring, tapping, obtain the base substrate part needed.
4. by base substrate part good for 3. middle car, use punching press handle rear end spline tooth of punch press mating mold, obtain the base substrate part needed.
5. by base substrate part good for 4. middle punching press, use the punching press of punch press mating mold to flatten handle front end, obtain the base substrate part needed.
6. by base substrate part good for 5. middle punching press, use room, milling good handle front end of CNC milling machine, complete to make stainless steel handle 3.
Surface treatment: the part rustless steel hexagonal main body 1 obtained in (1), (2), (3) step, stainless pipe main body 2, stainless steel handle 3 are put in full automatic polishing machine, it is polished, after deburring, obtains fabricated part rustless steel hexagonal main body, stainless pipe main body, stainless steel handle;
Assemble: the recessed bud end of fabricated part stainless pipe main body is inwardly inserted in the interior round recessed of rustless steel hexagonal main body, stainless steel handle is put sealing ring and rubber sheet gasket again, the band spline increment making stainless steel handle outwards penetrates in rustless steel hexagonal main body, is then sequentially loaded into potsherd, silica gel pad in stainless pipe main body;
Hand assembled completes, and obtains finished product rustless steel spool.
With reference to accompanying drawing 19-25, the mould related in the manufacturing process of rustless steel spool is:
Preferably, described step (1) makes in rustless steel hexagonal main body 1 mould 2. is cold pier diel.
Preferably, described step (2) makes in stainless pipe main body 2 mould 2. is notching die.
Preferably, described step (2) makes in stainless pipe main body 2 mould 3. is punching die.
Preferably, described (2) mould made in stainless pipe main body 2 4. is stamped female bud mould.
Preferably, described step (3) makes in spool stainless steel handle 3 mould 2. is cold pier punch-forming mold.
Preferably, described step (3) makes in spool stainless steel handle 3 mould 4. is punching press spline tooth mould.
Preferably, described step (3) makes in spool stainless steel handle 3 mould 2. is punching press handle mold.
Easy to understand, the present invention is realized by following steps: a makes rustless steel hexagonal main body �� b and makes stainless pipe main body �� c making stainless steel handle �� d surface treatment �� e assembling, the present invention provides the manufacture method of a kind of rustless steel spool, solve current faucet, angle valve spool manufacturing cost is high, productivity effect is low, production process is loaded down with trivial details, and the problem that end product quality is unstable, product content of beary metal is high, change conventional fabrication processes, the vitals of spool all adopts punching press to complete, improve productivity effect, save cost.
Claims (8)
1. the manufacture method of a rustless steel spool, it is characterised in that comprise the following steps:
(1) rustless steel hexagonal main body (1) is made
1. use sawing machine by raw material stainless pipe surface trimming, obtain needing the stainless pipe of length dimension;
2. by the stainless pipe of 1. middle well cutting, use punch press mating mold once cold pier punch forming indent round platform rank, inner via hole and outer-hexagonal boss, obtain base substrate part;
3. in 2., obtain base substrate part, use automatic lathe once to complete the outer tooth of car system and groove, obtain rustless steel hexagonal main body (1);
(2) stainless pipe main body (2) is made
1. use automatic lathe by raw material stainless pipe surface trimming, obtain needing the stainless pipe of length dimension;
2. by the stainless pipe of 1. middle well cutting, square groove in the punching press of punch press mating mold is used;
3. by base substrate part good for 2. middle punching press, punching press square hole of punch press mating mold is used;
4. by base substrate part good for 3. middle punching press, use stamped female bud of punch press mating mold, obtain stainless pipe main body (2);
(3) stainless steel handle (3) is made
1. use sawing machine by raw material stainless steel round bar surface trimming, obtain needing the stainless steel round bar of length dimension;
2. by the stainless steel round bar of 1. middle well cutting, use the once cold pier punch forming of punch press mating mold to become big blank leading portion, obtain the base substrate part needed;
3. by base substrate part good for 2. middle punching press, use automatic lathe to be once automatically performed car groove, boring, tapping, obtain the base substrate part needed;
4. by base substrate part good for 3. middle car, use punching press handle rear end spline tooth of punch press mating mold, obtain the base substrate part needed;
5. by base substrate part good for 4. middle punching press, use the punching press of punch press mating mold to flatten handle front end, obtain the base substrate part needed;
6. by base substrate part good for 5. middle punching press, use room, milling good handle front end of CNC milling machine, complete to make stainless steel handle (3);
(4) surface treatment
Part rustless steel hexagonal main body (1) obtained in (1), (2), (3) step, stainless pipe main body (2), stainless steel handle (3) are put in full automatic polishing machine, it is polished, after deburring, obtains fabricated part rustless steel hexagonal main body, stainless pipe main body, stainless steel handle;
(5) assemble
The recessed bud end of fabricated part stainless pipe main body is inwardly inserted in the interior round recessed of rustless steel hexagonal main body, stainless steel handle is put sealing ring and rubber sheet gasket again, the band spline increment making stainless steel handle outwards penetrates in rustless steel hexagonal main body, is then sequentially loaded into potsherd, silica gel pad in stainless pipe main body;
Hand assembled completes, and obtains finished product rustless steel spool.
2. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that it is cold pier diel that described step (1) makes in rustless steel hexagonal main body (1) mould 2..
3. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that it is notching die that described step (2) makes in stainless pipe main body (2) mould 2..
4. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that it is punching die that described step (2) makes in stainless pipe main body (2) mould 3..
5. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that described (2) make in stainless pipe main body (2) mould 4. is stamped female bud mould.
6. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that it is cold pier punch-forming mold that described step (3) makes in spool stainless steel handle (3) mould 2..
7. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that it is punching press spline tooth mould that described step (3) makes in spool stainless steel handle (3) mould 4..
8. the manufacture method of a kind of rustless steel spool according to claim 1, it is characterised in that it is punching press handle mold that described step (3) makes in spool stainless steel handle (3) mould 5..
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510108737.XA CN105619024B (en) | 2015-03-12 | 2015-03-12 | A kind of production method of stainless steel spool |
| CN201810028007.2A CN108044322A (en) | 2015-03-12 | 2015-03-12 | A kind of production method of stainless steel spool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510108737.XA CN105619024B (en) | 2015-03-12 | 2015-03-12 | A kind of production method of stainless steel spool |
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|---|---|---|---|
| CN201810028007.2A Division CN108044322A (en) | 2015-03-12 | 2015-03-12 | A kind of production method of stainless steel spool |
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| CN105619024A true CN105619024A (en) | 2016-06-01 |
| CN105619024B CN105619024B (en) | 2018-05-18 |
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| CN201510108737.XA Active CN105619024B (en) | 2015-03-12 | 2015-03-12 | A kind of production method of stainless steel spool |
| CN201810028007.2A Pending CN108044322A (en) | 2015-03-12 | 2015-03-12 | A kind of production method of stainless steel spool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106112412A (en) * | 2016-08-20 | 2016-11-16 | 无锡鹰贝精密轴承有限公司 | The deep blind hole processing technique of spool high accuracy |
| CN106392391A (en) * | 2016-11-09 | 2017-02-15 | 江苏金鑫电器有限公司 | Automatic welding device of aluminum alloy circular seam |
| CN107309616A (en) * | 2017-08-21 | 2017-11-03 | 吴正忠 | The manufacture method of flow control regulating valve core |
| CN107717335A (en) * | 2017-08-23 | 2018-02-23 | 台州响洲卫浴有限公司 | A kind of manufacture craft of stainless steel sanitaryware |
| CN110238610A (en) * | 2019-04-10 | 2019-09-17 | 刘升平 | A kind of production method of faucet handle |
| CN110842077A (en) * | 2019-11-12 | 2020-02-28 | 刘升平 | Manufacturing method of valve element water outlet hole, valve element and water faucet |
| CN112045375A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of environment-friendly valve body and product thereof |
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| CN106112412A (en) * | 2016-08-20 | 2016-11-16 | 无锡鹰贝精密轴承有限公司 | The deep blind hole processing technique of spool high accuracy |
| CN106392391A (en) * | 2016-11-09 | 2017-02-15 | 江苏金鑫电器有限公司 | Automatic welding device of aluminum alloy circular seam |
| CN107309616A (en) * | 2017-08-21 | 2017-11-03 | 吴正忠 | The manufacture method of flow control regulating valve core |
| CN107309616B (en) * | 2017-08-21 | 2023-05-09 | 吴正忠 | Method for manufacturing flow control regulating valve core |
| CN107717335A (en) * | 2017-08-23 | 2018-02-23 | 台州响洲卫浴有限公司 | A kind of manufacture craft of stainless steel sanitaryware |
| CN110238610A (en) * | 2019-04-10 | 2019-09-17 | 刘升平 | A kind of production method of faucet handle |
| CN110842077A (en) * | 2019-11-12 | 2020-02-28 | 刘升平 | Manufacturing method of valve element water outlet hole, valve element and water faucet |
| CN112045375A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of environment-friendly valve body and product thereof |
| CN112045375B (en) * | 2020-09-18 | 2023-01-06 | 项定洪 | Manufacturing process of environment-friendly valve body and product thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105619024B (en) | 2018-05-18 |
| CN108044322A (en) | 2018-05-18 |
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Denomination of invention: A manufacturing method of stainless steel valve core Effective date of registration: 20211028 Granted publication date: 20180518 Pledgee: Bank of China Limited Jianhu Branch Pledgor: JIANGSU LIANYUAN MACHINERY MANUFACTURING Co.,Ltd. Registration number: Y2021320000296 |