CN105312751A - Connecting method for aero-engine filter screen - Google Patents
Connecting method for aero-engine filter screen Download PDFInfo
- Publication number
- CN105312751A CN105312751A CN201510726114.9A CN201510726114A CN105312751A CN 105312751 A CN105312751 A CN 105312751A CN 201510726114 A CN201510726114 A CN 201510726114A CN 105312751 A CN105312751 A CN 105312751A
- Authority
- CN
- China
- Prior art keywords
- welding
- filter screen
- aero
- engine filter
- termination
- Prior art date
- 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.)
- Granted
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Classifications
-
- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/22—Nets, wire fabrics or the like
Abstract
The invention discloses a connecting method for an aero-engine filter screen and belongs to the technical field of aero-engines. The connecting method for the aero-engine filter screen is easy to operate and can achieve good welded joint quality. The method includes the following steps that (1) head joint assembly for a stainless steel screen is conducted, and head joint extending height is 2-3 mm; (2) tracing point demonstration is conducted through a robot, a welding track is determined, and the height between a welding gun and the head joint of the screen is controlled to be 1-2 mm; (3) welding process parameters are set, specifically, the welding current is 5-6 A, the welding speed is 8-9 mm/s, the orifice diameter is 0.8-1.0 mm, and plasma gas flow is 0.2-0.3 L/min; (4) micro-beam plasma welding is carried out through automatic welding by the robot; and (5) after welding is finished, filter screen shaping is performed through a forming circular cone.
Description
Technical field
The invention belongs to aero engine technology field, particularly relate to a kind of method of attachment of aero-engine filter screen.
Background technology
Engine filter screen is welded by stainless steel cloth, is mainly used to the impurity in filter fuel.Screen material is OCr18Ni9, and establishment pattern is plain weave establishment square hole net, and mesh basic size is 0.71mm, and stainless steel wire diameter is 0.31mm.
For above-mentioned special type part, meet difficulty during welding: 1) adopt docking welding fashionable dress to join precision and be difficult to ensure; 2) butting joint fixture cannot make each stainless steel wire ends contact, the situations such as joint existence is staggered, gap, and in welding process, stainless steel wire docking coordinates bad place to melt formation spheroidal separately, causes connection failure; 3) according to overlap joint, amount of lap at least will ensure a mesh spacing, by the interpenetration network of stainless steel cloth one end, then welds, and stainless steel wire end has part not connect completely, stainless steel wire likely occurs from being melt into ball blocking mesh; 4) adopt docking or overlap joint, solder yield is low, and the production time is long.
Summary of the invention
For prior art Problems existing, the invention provides a kind of method of attachment of simple to operate, aero-engine filter screen that weldquality is good.
To achieve these goals, the present invention adopts following technical scheme, and a kind of method of attachment of aero-engine filter screen, comprises the steps:
Step one: to be terminated assembling to stainless steel cloth, it is highly 2 ~ 3mm that termination is stretched out;
Step 2: adopt robot to carry out described point teaching, determine welding track, the height controlling welding gun distance silk screen termination place is 1 ~ 2mm;
Step 3: welding condition is set, wherein, welding current is 5 ~ 6A, and speed of welding is 8 ~ 9mm/s, and orifice diameter is 0.8 ~ 1.0mm, and ion-gas flow is 0.2 ~ 0.3L/min;
Step 4: adopt robot automatic welding to carry out MICROBEAM PLASMA WELDING;
Step 5: after having welded, adopts shaping circular cone to carry out filter screen integer.
It is highly 2.9mm that termination described in step one is stretched out.
Welding gun described in step 2 is 1.2mm apart from the height at silk screen termination place.
Welding condition described in step 3, wherein, welding current is 5A, and speed of welding is 8mm/s, and orifice diameter is 0.8mm, and ion-gas flow is 0.3L/min.
Beneficial effect of the present invention:
1, adopt filter screen method of attachment of the present invention to achieve plain weave establishment square hole net, mesh basic size is 0.71mm, and stainless steel wire diameter is that the filter screen of 0.31mm connects;
2, the present invention adopts robot to carry out automatic welding, and technological parameter is stablized, and weld seam uniformity is better, and weld is accepted rate reaches more than 95%;
3, the even weld after welding is consistent, and intensity is high, leaks phenomenon occur without fracture of wire, weldering;
4, simple to operate, do not need to fill metal material, quick, the light weight manufacture of part can be realized.
Accompanying drawing explanation
Fig. 1 is the expansion schematic diagram of aero-engine filter screen;
In figure: 1-filter screen.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The expansion schematic diagram of aero-engine filter screen, as shown in Figure 1.
A method of attachment for aero-engine filter screen, comprises the steps:
Step one: to be terminated assembling to stainless steel cloth is ensure weld seam state uniformity, by piece-holder on butting joint fixture time joint want close alignment, and prune smooth, it is highly 2.9mm that termination is stretched out.
Silk screen fusing forms full, good welding point, and need to melt a certain amount of metal, silk screen termination is stretched out highly larger, and silk screen termination is more away from holder position, and during welding, silk screen is easily out of shape, silk bifurcated, and silk and silk do not connect; Silk screen termination is stretched out highly less, and holder position is got in silk screen termination, good heat dissipation effect.But due to the porous of silk screen own, each several part heat radiation is uneven, and silk screen fusing is uneven, and appearance of weld unsightly.Be OCr18Ni9 for material, establishment pattern is plain weave establishment square hole net, and mesh basic size is 0.71mm, and stainless steel wire diameter is the filter screen of 0.31mm, by test of many times, determines that termination stretches out weldquality when being highly 2.9mm best.
Step 2: adopt robot to carry out described point teaching, determine welding track, move directly over the Weld pipe mill that welding gun must be fitted at two-layer silk screen, otherwise can produce and be partially welded and defect such as local scorification etc., controlling welding gun apart from the height at silk screen termination place is 1.2mm.
Step 3: welding condition is set, wherein, welding current is 5A, and speed of welding is 8mm/s, and orifice diameter is 0.8mm, and ion-gas flow is 0.3L/min; Ion-gas pressure bottle adopts bipolar pressure-reducing valve to reduce pressure, and air-flow flows more stable after secondary pressure, and pressure-reducing valve secondary pressure pressure is 0.3MPa, and protection gas composition is 95%Ar and 5%H
2mist.
Step 4: adopt robot automatic welding to carry out MICROBEAM PLASMA WELDING.
Before welding, with 800 order sand paper polishing silk screen welds, then dip acetone with absorbent cotton and clear up place to be welded, remove the impurity such as oxide, greasy dirt; During welding, should weld heat input be reduced, avoid stainless steel wire scaling loss excessive; Should decay current gradually during weld seam ending, postpone after blow-out to supply gas, welding gun should stop 8s at ending place, prevent weld to be oxidized.
Step 5: after having welded, adopts shaping circular cone to carry out filter screen integer.
The centering degree of welding gun and weld seam is the key factor affecting stainless steel cloth welding quality, and welding condition is in table 1.
Table 1 welding condition
Result of the test shows: under the welding condition of table 1,2.3mm burnt by silk screen, and silk screen termination is stretched out and highly remained 0.6mm, i.e. postwelding reinforcement, and the weldquality now formed is good.Adopt the present invention to carry out filter screen connection, even weld is consistent, and intensity is high, and leak phenomenon occur without fracture of wire, weldering, weld is accepted rate reaches more than 95%.
Claims (4)
1. a method of attachment for aero-engine filter screen, is characterized in that, comprises the steps:
Step one: to be terminated assembling to stainless steel cloth, it is highly 2 ~ 3mm that termination is stretched out;
Step 2: adopt robot to carry out described point teaching, determine welding track, the height controlling welding gun distance silk screen termination place is 1 ~ 2mm;
Step 3: welding condition is set, wherein, welding current is 5 ~ 6A, and speed of welding is 8 ~ 9mm/s, and orifice diameter is 0.8 ~ 1.0mm, and ion-gas flow is 0.2 ~ 0.3L/min;
Step 4: adopt robot automatic welding to carry out MICROBEAM PLASMA WELDING;
Step 5: after having welded, adopts shaping circular cone to carry out filter screen integer.
2. the method for attachment of aero-engine filter screen according to claim 1, it is characterized in that the termination described in step one is stretched out is highly 2.9mm.
3. the method for attachment of aero-engine filter screen according to claim 1, is characterized in that the welding gun described in step 2 is 1.2mm apart from the height at silk screen termination place.
4. the method for attachment of aero-engine filter screen according to claim 1, is characterized in that the welding condition described in step 3, and wherein, welding current is 5A, and speed of welding is 8mm/s, and orifice diameter is 0.8mm, and ion-gas flow is 0.3L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510726114.9A CN105312751B (en) | 2015-10-30 | 2015-10-30 | A kind of connection method of aero-engine filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510726114.9A CN105312751B (en) | 2015-10-30 | 2015-10-30 | A kind of connection method of aero-engine filter screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105312751A true CN105312751A (en) | 2016-02-10 |
| CN105312751B CN105312751B (en) | 2018-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510726114.9A Active CN105312751B (en) | 2015-10-30 | 2015-10-30 | A kind of connection method of aero-engine filter screen |
Country Status (1)
| Country | Link |
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| CN (1) | CN105312751B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774069A (en) * | 2009-12-31 | 2010-07-14 | 上海工程技术大学 | Procession welding method for superfine stainless steel mesh |
| CN102922111A (en) * | 2012-10-09 | 2013-02-13 | 上海工程技术大学 | Joint assembly methods for micro-plasma arc lap welding of screen |
| CN102922114A (en) * | 2012-10-09 | 2013-02-13 | 上海工程技术大学 | Micro-beam plasma arc welding fine tracking system for ultrathin and superfine structural member |
| CN103831516A (en) * | 2013-12-16 | 2014-06-04 | 上海工程技术大学 | Stainless steel mesh discontinuous welding spot continuous welding method based on vision sensing technology |
-
2015
- 2015-10-30 CN CN201510726114.9A patent/CN105312751B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774069A (en) * | 2009-12-31 | 2010-07-14 | 上海工程技术大学 | Procession welding method for superfine stainless steel mesh |
| CN102922111A (en) * | 2012-10-09 | 2013-02-13 | 上海工程技术大学 | Joint assembly methods for micro-plasma arc lap welding of screen |
| CN102922114A (en) * | 2012-10-09 | 2013-02-13 | 上海工程技术大学 | Micro-beam plasma arc welding fine tracking system for ultrathin and superfine structural member |
| CN103831516A (en) * | 2013-12-16 | 2014-06-04 | 上海工程技术大学 | Stainless steel mesh discontinuous welding spot continuous welding method based on vision sensing technology |
Non-Patent Citations (3)
| Title |
|---|
| 李亚江，王娟，夏春智: "《特种焊接技术及应用》", 31 July 2008, 化学工业出版社 * |
| 葛志雄: "微束等离子弧焊在不锈钢丝网焊接中的应用", 《机械工人（热加工）》 * |
| 高山: "微束等离子焊接在航空发动机中的应用", 《新技术新工艺》 * |
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| Publication number | Publication date |
|---|---|
| CN105312751B (en) | 2018-01-16 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |