CN102748481A - Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof - Google Patents
Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof Download PDFInfo
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- CN102748481A CN102748481A CN2012102404477A CN201210240447A CN102748481A CN 102748481 A CN102748481 A CN 102748481A CN 2012102404477 A CN2012102404477 A CN 2012102404477A CN 201210240447 A CN201210240447 A CN 201210240447A CN 102748481 A CN102748481 A CN 102748481A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses an urea injection valve for an SCR (Selective Catalytic Reduction) system, which comprises a valve element and a valve body, wherein the valve body is provided with a center hole; the valve element is movably inserted in the center hole; the valve element and the valve body can relatively rotate and slide up and down to operate; and the upper end of the valve element is matched with an armature body by adopting the laser welding mode. A laser welding method comprises an assembling step, a pre-welding step, a checking step, a welding step and a final checking step. After the laser welding process is used, the problem of deformation of a product, which is caused by the high welding temperature, can be solved; a welding wire is not added when the product is welded; the mode of local rapid temperature rising and fusion of the welding positions of two materials by the numerical control continuous welding is adopted; the problem of reliability, which is caused by the pseudo soldering, is solved; the production speed can also be quickened; and the cleanness of the product is improved.
Description
Technical field
The present invention relates to the technical field of internal combustion engine part, particularly a kind of SCR system carbamide injection valve and method for laser welding thereof of being used for.
Background technique
In the existing technology, valve core material 9Cr18Mo, armature body DT4 adopt argon arc welding technique between general spool and the armature body, and for these two kinds of material different, when using the argon arc welding welding, welding temperature is high, postwelding product easy deformation.
When argon arc welding is welded, also need add welding wire, and this welding wire forms rosin joint when on two kinds of material different, fusing easily, cause welding not firm, be prone to cause quality problems.
Summary of the invention
Technical problem to be solved by this invention is the present situation to existing technology, provide that a kind of product is indeformable, reliable welding, speed of production reach soon the product turbidity test high be used for SCR system carbamide injection valve and method for laser welding thereof.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: a kind of SCR of being used for system carbamide injection valve; Include spool and valve body, wherein, valve body is formed with mesopore; Spool activity inserting is in mesopore, and spool and valve body can rotate and slide down movement row relatively; The spool upper end adopts laser bonding to be combined with the armature body.
The measure of taking also comprises:
Above-mentioned spool and armature body joint have been provided with two places fusion weld seam at least.
Above-mentioned valve body lower portion is provided with the spray-hole that is used for aqueous solution of urea.
Above-mentioned valve body lower portion is formed with inner conical surface, and the spool bottom is provided with the pressure-bearing conical surface, and the inner conical surface and the pressure-bearing conical surface are sealed and matched when putting in place in that spool is descending.
The plane is shaped on the grooved ring body of indent on the above-mentioned armature body, is shaped on positioning hole in the middle of this grooved ring body.
Above-mentioned spool upper end is shaped on locating stud, and the locating stud locating stud cooperates with the eye-splice of armature body positioning hole.
Above-mentioned fusion weld seam is positioned at grooved ring body positioning hole upper brim along last; Spool is positioned at the locating stud lower end and is shaped on cylindrical body, and generation has step body between this cylindrical body and the locating stud, deducts on this step body step body in armature body bottom.
The method for laser welding of a kind of SCR system carbamide injection valve wherein, includes following steps:
Be equipped with step: the armature body is complied with detain the upper end that is assigned in valve core up and down, and the location correctly;
Cleaning process: use ultrasonic cleaning apparatus to clean,, remove oil stain and impurity in armature body and valve core connecting part;
The inspection step: from the flat, technological requirement, to armature body, valve core soldering member carry out size, whether the position is correctly checked;
Welding step: after treating size, position detection correctly, launch laser beam welding machine,, and produce the fusion weld seam with armature body, valve core firm welding;
Examine step eventually: with integrally welded armature body, valve core, from the flat, technological requirement are carried out size, location test; Be certified products after the assay was approved.
In the above-mentioned inspection step, when size, position detection existence mistake, earlier armature body, spool are separated, carry out being equipped with step again.
After the above-mentioned welding step, be provided with polishing and repair step, in this step, the fusion face of weld is polished processing.
Compared with prior art, a kind of SCR system carbamide injection valve that is used for of the present invention includes spool and valve body, and wherein, valve body is formed with mesopore, and spool activity inserting is in mesopore, and spool and valve body can rotate and slide down movement row relatively; The spool upper end adopts laser bonding to be combined with the armature body.Method for laser welding includes equipped step, cleaning process, inspection step, welding step, whole inspection step.The invention has the advantages that: can solve because the product distortion that the welding temperature height causes after using laser welding process; Product does not add welding wire when welding; Adopt the numerical control continuous welding to lean on the fusion that is rapidly heated of the part of two kinds of material welding parts; Solve the integrity problem that rosin joint causes, speed of production is accelerated, the product turbidity test improve.
Description of drawings
Vertical cross-sectional schematic when Fig. 1 is embodiment of the invention assembling;
Fig. 2 is the cross-sectional schematic of the embodiment of the invention;
Fig. 3 is the process flow diagram of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Fig. 1 is extremely shown in Figure 3 to be structural representation of the present invention.
Reference character among Fig. 1 to Fig. 3 wherein is: armature body 1, grooved ring body 11, spool 2, the pressure-bearing conical surface 21, locating stud 22, cylindrical body 23, step body 24, fusion weld seam 3, valve body 4, mesopore 4a, spray-hole 41, inner conical surface 42.
The embodiment of the invention,
A kind of SCR system carbamide injection valve that is used for includes spool 2 and valve body 4, and wherein, valve body 4 is formed with mesopore 4a, and spool 2 activity insertings are in mesopore 4a, and spool 2 can rotate and slide down movement row with valve body 4 relatively; Spool 2 upper ends adopt laser bonding to be combined with armature body 1.
Spool 2 has been provided with two places fusion weld seam 3 at least with armature body 1 joint.
The plane is shaped on the grooved ring body 11 of indent on the armature body 1, is shaped on positioning hole in the middle of this grooved ring body 11.
Fusion weld seam 3 is positioned at grooved ring body 11 positioning hole upper brims along last; Spool 2 is positioned at locating stud 22 lower ends and is shaped on cylindrical body 23, and generation has step body 24 between this cylindrical body 23 and the locating stud 22, deducts on this step body step body 24 in armature body 1 bottom.
The method for laser welding of a kind of SCR system carbamide injection valve wherein, includes following steps:
Be equipped with step: armature body 1 is complied with detain the upper end that is assigned in valve core 2 up and down, and the location correctly;
Cleaning process: use ultrasonic cleaning apparatus to clean,, remove oil stain and impurity in armature body 1 and valve core 2 connecting parts;
The inspection step: from the flat, technological requirement, to armature body 1, valve core 2 soldering members carry out size, whether the position is correctly checked;
Welding step: after treating size, position detection correctly, launch laser beam welding machine,, and produce fusion weld seam 3 with armature body 1, valve core 2 firm welding;
Examine step eventually: with integrally welded armature body 1, valve core 2, from the flat, technological requirement are carried out size, location test; Be certified products after the assay was approved.
The advantage of the embodiment of the invention is: can solve because the product distortion that the welding temperature height causes after using laser welding process; Product does not add welding wire when welding; Adopt the numerical control continuous welding to lean on the fusion that is rapidly heated of the part of two kinds of material welding parts; Solve the integrity problem that rosin joint causes, speed of production is accelerated, the product turbidity test improve.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (10)
1. one kind is used for SCR system carbamide injection valve; Include spool (2) and valve body (4); It is characterized in that: described valve body (4) is formed with mesopore (4a), and described spool (2) activity inserting is in mesopore (4a), and spool (2) can rotate and slide down movement row with valve body (4) relatively; Described spool (2) upper end adopts laser bonding to be combined with armature body (1).
2. a kind of SCR system carbamide injection valve that is used for according to claim 1 is characterized in that: described spool (2) has been provided with two places fusion weld seam (3) at least with armature body (1) joint.
3. a kind of SCR system carbamide injection valve that is used for according to claim 2, it is characterized in that: described valve body (4) bottom is provided with the spray-hole (41) that is used for aqueous solution of urea.
4. a kind of SCR system carbamide injection valve that is used for according to claim 3; It is characterized in that: described valve body (4) bottom is formed with inner conical surface (42); Described spool (2) bottom is provided with the pressure-bearing conical surface (21), and described inner conical surface (42) is sealed and matched when descending the putting in place of spool (2) with the pressure-bearing conical surface (21).
5. a kind of SCR system carbamide injection valve that is used for according to claim 4 is characterized in that: described armature body (1) is gone up the grooved ring body (11) that the plane is shaped on indent, is shaped on positioning hole in the middle of this grooved ring body (11).
6. a kind of SCR system carbamide injection valve that is used for according to claim 5 is characterized in that: described spool (2) upper end is shaped on locating stud (22), and locating stud locating stud (22) cooperates with armature body (1) positioning hole eye-splice.
7. a kind of SCR system carbamide injection valve that is used for according to claim 5 is characterized in that: described fusion weld seam (3) is positioned at described grooved ring body (11) positioning hole upper brim along last; Described spool (2) is positioned at locating stud (22) lower end and is shaped on cylindrical body (23), and generation has step body (24) between this cylindrical body (23) and the locating stud (22), deducts on this step body step body (24) in described armature body (1) bottom.
8. the method for laser welding of a SCR as claimed in claim 1 system carbamide injection valve is characterized in that: include following steps:
Be equipped with step: armature body (1) is complied with detain the upper end that is assigned in valve core (2) up and down, and the location correctly;
Cleaning process: use ultrasonic cleaning apparatus to clean,, remove oil stain and impurity in armature body (1) and valve core (2) connecting part;
The inspection step: from the flat, technological requirement, to armature body (1), valve core (2) soldering member carry out size, whether the position is correctly checked;
Welding step: after treating size, position detection correctly, launch laser beam welding machine,, and produce fusion weld seam (3) with armature body (1), valve core (2) firm welding;
Examine step eventually: with integrally welded armature body (1), valve core (2), from the flat, technological requirement are carried out size, location test; Be certified products after the assay was approved.
9. a kind of SCR system carbamide injection valve and method for laser welding thereof of being used for according to claim 8 is characterized in that: in the described inspection step, when size, position detection existence mistake, earlier armature body (1), spool (2) are separated, carry out being equipped with step again.
10. a kind of SCR system carbamide injection valve and method for laser welding thereof of being used for according to claim 9 is characterized in that: after the described welding step, be provided with polishing and repair step, in this step, processing is polished on fusion weld seam (3) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102404477A CN102748481A (en) | 2012-07-12 | 2012-07-12 | Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102404477A CN102748481A (en) | 2012-07-12 | 2012-07-12 | Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof |
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| CN102748481A true CN102748481A (en) | 2012-10-24 |
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| CN2012102404477A Pending CN102748481A (en) | 2012-07-12 | 2012-07-12 | Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106460619A (en) * | 2014-06-16 | 2017-02-22 | 罗伯特·博世有限公司 | Injection device |
| US11525380B2 (en) | 2019-01-11 | 2022-12-13 | Cummins Emission Solutions Inc. | Aftertreatment system with multiple dosing modules |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0922520A1 (en) * | 1997-12-09 | 1999-06-16 | Siemens Automotive Corporation | Method of joining a member of soft magnetic material to a member of hardned material using a brazing technique |
| JP2001073904A (en) * | 1999-09-01 | 2001-03-21 | Bosch Automotive Systems Corp | Welding method between needle valve and armature in electromagnetic fuel injection valve and its valve assembly |
| US20060016916A1 (en) * | 2004-07-23 | 2006-01-26 | Magnetti Marelli Powertrain S S.P.A. | Fuel injector provided with a high flexibility plunger |
| CN101137860A (en) * | 2005-03-08 | 2008-03-05 | 卡特彼勒公司 | Valve coupling system |
| CN101463748A (en) * | 2009-01-14 | 2009-06-24 | 无锡市凯龙汽车设备制造有限公司 | Carbamide injection valve |
| CN201347787Y (en) * | 2009-01-14 | 2009-11-18 | 无锡市凯龙汽车设备制造有限公司 | Urea injecting valve |
| CN202100308U (en) * | 2011-06-21 | 2012-01-04 | 中国汽车工程研究院股份有限公司 | Selective catalytic reduction (SCR) system for urea solution metering injection |
| CN202659913U (en) * | 2012-07-12 | 2013-01-09 | 宁波舜田良源油嘴油泵有限公司 | Urea injection valve for selective catalytic reduction (SCR) system |
-
2012
- 2012-07-12 CN CN2012102404477A patent/CN102748481A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0922520A1 (en) * | 1997-12-09 | 1999-06-16 | Siemens Automotive Corporation | Method of joining a member of soft magnetic material to a member of hardned material using a brazing technique |
| JP2001073904A (en) * | 1999-09-01 | 2001-03-21 | Bosch Automotive Systems Corp | Welding method between needle valve and armature in electromagnetic fuel injection valve and its valve assembly |
| US20060016916A1 (en) * | 2004-07-23 | 2006-01-26 | Magnetti Marelli Powertrain S S.P.A. | Fuel injector provided with a high flexibility plunger |
| CN101137860A (en) * | 2005-03-08 | 2008-03-05 | 卡特彼勒公司 | Valve coupling system |
| CN101463748A (en) * | 2009-01-14 | 2009-06-24 | 无锡市凯龙汽车设备制造有限公司 | Carbamide injection valve |
| CN201347787Y (en) * | 2009-01-14 | 2009-11-18 | 无锡市凯龙汽车设备制造有限公司 | Urea injecting valve |
| CN202100308U (en) * | 2011-06-21 | 2012-01-04 | 中国汽车工程研究院股份有限公司 | Selective catalytic reduction (SCR) system for urea solution metering injection |
| CN202659913U (en) * | 2012-07-12 | 2013-01-09 | 宁波舜田良源油嘴油泵有限公司 | Urea injection valve for selective catalytic reduction (SCR) system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106460619A (en) * | 2014-06-16 | 2017-02-22 | 罗伯特·博世有限公司 | Injection device |
| US11525380B2 (en) | 2019-01-11 | 2022-12-13 | Cummins Emission Solutions Inc. | Aftertreatment system with multiple dosing modules |
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Application publication date: 20121024 |