CN111515563B - Vacuum electron beam welding method for oblique welding seam comb tooth part - Google Patents
Vacuum electron beam welding method for oblique welding seam comb tooth part Download PDFInfo
- Publication number
- CN111515563B CN111515563B CN202010370161.5A CN202010370161A CN111515563B CN 111515563 B CN111515563 B CN 111515563B CN 202010370161 A CN202010370161 A CN 202010370161A CN 111515563 B CN111515563 B CN 111515563B
- Authority
- CN
- China
- Prior art keywords
- welding
- grate
- electron beam
- nut
- comb tooth
- 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.)
- Active
Links
Images
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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
Abstract
The invention provides a vacuum electron beam welding method of a diagonal weld grate part, which comprises the following steps: assembling the grate tooth compression nut and the grate tooth sawtooth nut to obtain a grate tooth assembly; performing tack welding and vacuum electron beam welding on the grate component, wherein during the vacuum electron beam welding, the welding speed is 20 +/-2 mm/s, and the acceleration voltage is 150 +/-10 KV; and carrying out aging heat treatment and inspection on the welded grate component. The electron beam welding of the oblique welding seam can be realized, the integral deformation of parts is effectively controlled, and the coaxiality requirement after welding is ensured.
Description
Technical Field
The invention relates to the field of welding, in particular to a vacuum electron beam welding method for a bevel weld grate part.
Background
The grate component is one of key components in an aircraft engine and bears severe alternating load and impact load during service. Therefore, the requirements on the weld quality and the deformation after welding of the vacuum electron beam of the grate component are higher.
Fig. 1 is a schematic structural view of a comb tooth compression nut and a comb tooth sawtooth nut, as shown in fig. 1, a material of a comb tooth assembly is 1Cr11Ni2W2MoV, the comb tooth assembly is formed by combining the comb tooth compression nut and the comb tooth sawtooth nut, and the comb tooth assembly is not a traditional 90-degree butt weld but a 65-degree oblique weld butt joint structure. And the depth of the welding seam of the grate component is required to be not less than 3.85 mm.
At present, a special customized fixture is generally adopted to position a part and then carry out electron beam welding. In order to ensure the requirement of the depth of a welding seam, the adopted electron beam current is large, and meanwhile, due to the limitation of a tool, the poor heat conduction of the grate tooth assembly can cause the deformation of the grate tooth assembly to be too large or welding defects to be generated, and even parts are scrapped.
Disclosure of Invention
The invention aims to provide a vacuum electron beam welding method of a diagonal weld grate component, which can realize electron beam welding of a diagonal weld, effectively control the integral deformation of parts and ensure the coaxiality requirement after welding.
The invention provides a vacuum electron beam welding method of a diagonal weld grate component, which comprises the following steps:
assembling the grate tooth compression nut and the grate tooth sawtooth nut to obtain a grate tooth assembly;
performing tack welding and vacuum electron beam welding on the grate component, wherein during the vacuum electron beam welding, the welding speed is 20 +/-2 mm/s, and the acceleration voltage is 150 +/-10 KV;
and carrying out aging heat treatment and inspection on the welded grate component.
After welding, the parts are subjected to welding aging heat treatment, so that the stress generated in the welding process can be reduced.
Optionally, the positioning welding of the grate assembly includes:
and (3) performing positioning welding on the grate component by adopting argon tungsten-arc welding, wherein the positioning welding spots are uniformly and symmetrically distributed on the grate component.
Compared with the traditional vacuum electron beam welding method for positioning, the method adopts the argon tungsten-arc welding to perform positioning welding on the comb tooth pressing nut and the comb tooth sawtooth nut aiming at the oblique welding seam structure. Not only improves the welding efficiency, but also saves the time for customizing the special fixture.
Optionally, the diameter of the positioning welding spot is 1mm, the positioning welding is self-fluxing positioning, and the welding current of the positioning welding spot is 30A.
Optionally, the tungsten electrode used in the tack welding is WCe20, the diameter of the tungsten electrode is 1.5mm, the protective gas is argon, the purity is 99.99%, and the gas flow is 4L/min.
Optionally, the welded grate assembly is inspected, including:
and (3) carrying out magnetic flaw detection on the welding line of the grate component by adopting a continuous method and a remanence method.
Optionally, the welded grate component is inspected, and the method further includes:
and (5) carrying out post-welding coaxiality inspection on the grate component.
Optionally, before the assembly of the comb tooth compression nut and the comb tooth sawtooth nut, the vacuum electron beam welding method for the oblique weld joint comb tooth assembly further includes:
cleaning the comb tooth compression nut and the comb tooth sawtooth nut;
demagnetizing the comb tooth pressing nut and the comb tooth sawtooth nut, wherein the magnetic flux density of the demagnetized comb tooth pressing nut and the demagnetized comb tooth sawtooth nut is more than 1 multiplied by 10-4。
The grid tooth pressing nut and the grid tooth sawtooth nut are demagnetized together by cleaning greasy dirt and rust on the surfaces of the grid tooth pressing nut and the grid tooth sawtooth nut, so that the situation that electron beam current is disturbed and cannot be welded due to high magnetic flux density can be avoided.
Optionally, during vacuum electron beam welding, the welding speed is 20mm/s, and the acceleration voltage is 150 KV.
The invention provides a vacuum electron beam welding method of a diagonal weld grate component, which is used for carrying out electron beam welding on the grate component. Reasonable positioning welding method and electron beam welding process parameters are adopted, the welding seam quality is guaranteed, welding deformation is effectively controlled, and good welding seams are obtained. The flaw detection after welding is all qualified, and the coaxiality of the grate assembly meets the requirement of being less than or equal to 0.5 mm.
Drawings
FIG. 1 is a schematic structural view of a labyrinth gland nut and a labyrinth sawtooth nut;
FIG. 2 is a schematic flow chart of a vacuum electron beam welding method for a bevel welded grate component according to an embodiment of the present invention;
fig. 3 is a schematic view of a diagonal weld grate assembly according to an embodiment of the invention.
Detailed Description
Fig. 2 is a schematic flow chart of a vacuum electron beam welding method for a bevel weld grate part according to an embodiment of the present invention, and referring to fig. 2, the vacuum electron beam welding method for a bevel weld grate part according to the present invention includes the following steps:
step 1, cleaning oil stains and corrosion on the surfaces of the grate hold-down nut and the grate sawtooth nut, and then carrying out demagnetization treatment on the grate hold-down nut and the grate sawtooth nut together.
Optionally, magnetic flux density after demagnetizationShould be greater than 1 × 10-4The problem that the electron beam is disturbed and cannot be welded due to high magnetic flux density can be avoided;
step 2, assembling the grate tooth compression nut and the grate tooth sawtooth nut according to requirements;
and 3, performing positioning welding on the comb tooth compression nut and the comb tooth sawtooth nut by adopting argon tungsten-arc welding, wherein the positioning welding points are 4 points which are uniform and symmetrical, and the diameter of the positioning welding points is 1 mm. The tack welding is self-fluxing tack welding, and the welding current is 30A. The tungsten electrode used was WCe20, the diameter of the tungsten electrode being 1.5 mm. The protective gas is argon, the purity is 99.99 percent, and the gas flow is 4L/min.
Compared with the traditional vacuum electron beam welding method for positioning, the method adopts the argon tungsten-arc welding to perform positioning welding on the comb tooth pressing nut and the comb tooth sawtooth nut aiming at the oblique welding seam structure. Not only improves the welding efficiency, but also saves the time for customizing the special fixture.
And 4, performing formal electron beam welding on the grate component.
In the traditional vacuum electron beam welding process, in order to ensure the weld penetration, the electron beam current is increased to ensure, and the embodiment controls the accelerating voltage and the welding speed in a specific range aiming at the inclined weld structure of the comb teeth, so that the electron beam current is reduced compared with the prior art, the weld depth can still be ensured, and the phenomenon that the poor heat conduction of the comb teeth assembly causes the too large deformation of the comb teeth assembly or generates the welding defect, and even parts are scrapped is avoided.
Optionally, during vacuum electron beam welding, the beam current can be reduced to 25mA by setting the welding speed to be 20 ± 2mm/s and the accelerating voltage to be within the range of 150 ± 10 KV.
Optionally, the parameters of a formal weld are as follows:
| welding parameters | Formal welding |
| Accelerating voltage (KV) | 150 |
| Distance (mm) between workpiece and welding gun | 588 |
| Welding speed (mm/s) | 20 |
| Focusing current (mA) | 2088 |
| Electron beam current (mA) | 25 |
Step 5, carrying out aging heat treatment;
and carrying out welding aging heat treatment on the parts in order to reduce stress generated in the welding process after welding.
And 6, carrying out magnetic flaw detection on the welding seam: firstly, checking the parts by a continuous method, and then checking by a residual magnetism method; if inclusions or air holes with the size larger than or equal to 0.20mm exist, the welding seam is determined to be unqualified;
and 7, final inspection, namely inspecting the coaxiality of the welded grate component.
According to the invention, the grid assembly is subjected to electron beam welding through the electron beam welding process. Reasonable positioning welding method and electron beam welding process parameters are adopted, the welding seam quality is guaranteed, welding deformation is effectively controlled, and good welding seams are obtained. The flaw detection after welding is all qualified, and the coaxiality of the grate assembly meets the requirement of being less than or equal to 0.5 mm.
Fig. 3 is a schematic view of a fillet welded grate component according to an embodiment of the present invention, and as shown in fig. 3, for a front grate nut component of an aircraft engine made of 1Cr11Ni2W2MoV, the front grate nut component is formed by combining a grate hold-down nut and a grate sawtooth nut, and the grate component is in a 65 ° fillet welded butt joint structure. The depth of a welding line of the grate component is required to be not less than 3.85mm, inclusions or air holes with the size equal to or more than 0.20mm cannot exist, cracks, incomplete penetration, incomplete fusion, sharp-angle shrinkage cavities or inclusion defects are not allowed in the welding line; the size of a single air hole is less than 0.2 mm; the minimum spacing between air holes is 4D, where D is the size of the largest defect; the number of air holes allowed in the 100mm long welding seam is less than 2; the coaxiality requirement of the welded grid teeth is less than or equal to 0.5 mm.
Claims (5)
1. A vacuum electron beam welding method for a bevel weld grate part is characterized by comprising the following steps:
assembling the grate tooth compression nut and the grate tooth sawtooth nut to obtain a grate tooth assembly;
performing tack welding and vacuum electron beam welding on the grate component, wherein during the vacuum electron beam welding, the welding speed is 20 +/-2 mm/s, and the acceleration voltage is 150 +/-10 KV;
carrying out aging heat treatment and inspection on the welded grate component;
the beam current of the electron beam does not exceed 25 mA;
carry out the tack welding to the labyrinth subassembly, include:
performing positioning welding on the grate component by adopting argon tungsten-arc welding, wherein the positioning welding points are uniformly and symmetrically distributed on the grate component;
the diameter of the positioning welding spot is 1mm, the positioning welding is self-fluxing positioning, and the welding current of the positioning welding spot is 30A;
the tungsten electrode used in the tack welding is WCe20, the diameter of the tungsten electrode is 1.5mm, the protective gas is argon, the purity is 99.99%, and the gas flow is 4L/min.
2. The method of claim 1, wherein inspecting the welded grate assembly comprises:
and performing magnetic flaw detection on the welding seam of the grate component by adopting a continuous method and a residual magnetism method.
3. The method of claim 2, wherein inspecting the welded grate assembly further comprises:
and (5) carrying out post-welding coaxiality inspection on the grate component.
4. The method of claim 1, wherein prior to assembling the labyrinth gland nut and the labyrinth sawtooth nut, the method further comprises:
cleaning the comb tooth compression nut and the comb tooth sawtooth nut;
demagnetizing the comb tooth pressing nut and the comb tooth sawtooth nut, wherein the magnetic flux density of the demagnetized comb tooth pressing nut and the demagnetized comb tooth sawtooth nut is more than 1 multiplied by 10-4。
5. The method according to claim 1, wherein the welding speed is 20mm/s and the acceleration voltage is 150KV in the vacuum electron beam welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010370161.5A CN111515563B (en) | 2020-04-30 | 2020-04-30 | Vacuum electron beam welding method for oblique welding seam comb tooth part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010370161.5A CN111515563B (en) | 2020-04-30 | 2020-04-30 | Vacuum electron beam welding method for oblique welding seam comb tooth part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111515563A CN111515563A (en) | 2020-08-11 |
| CN111515563B true CN111515563B (en) | 2022-05-06 |
Family
ID=71907543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010370161.5A Active CN111515563B (en) | 2020-04-30 | 2020-04-30 | Vacuum electron beam welding method for oblique welding seam comb tooth part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111515563B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463694A (en) * | 2008-09-23 | 2010-03-24 | Rapid Heat Systems Ltd | Method and apparatus for preheating and welding |
| CN102294541A (en) * | 2011-08-30 | 2011-12-28 | 哈尔滨汽轮机厂有限责任公司 | Electron beam welding method for ultra supercritical partition plates |
| CN102990217A (en) * | 2012-12-03 | 2013-03-27 | 哈尔滨汽轮机厂有限责任公司 | Electron beam welding method of gas turbine casing with horizontal flange structure |
| CN104191095A (en) * | 2014-08-04 | 2014-12-10 | 贵州黎阳航空动力有限公司 | Welding process of large-diameter annular part |
| CN110216363A (en) * | 2019-06-25 | 2019-09-10 | 哈尔滨汽轮机厂有限责任公司 | A kind of electro-beam welding method of gas turbine partition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052556A (en) * | 2016-08-23 | 2017-08-18 | 哈尔滨东安发动机（集团）有限公司 | A kind of vacuum electron beam welding method of membranous disc component |
| CN110695557A (en) * | 2019-09-27 | 2020-01-17 | 中国船舶重工集团公司第七二五研究所 | Electron beam composite narrow gap TIG welding method for titanium alloy component with ultra-large thickness |
-
2020
- 2020-04-30 CN CN202010370161.5A patent/CN111515563B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463694A (en) * | 2008-09-23 | 2010-03-24 | Rapid Heat Systems Ltd | Method and apparatus for preheating and welding |
| CN102294541A (en) * | 2011-08-30 | 2011-12-28 | 哈尔滨汽轮机厂有限责任公司 | Electron beam welding method for ultra supercritical partition plates |
| CN102990217A (en) * | 2012-12-03 | 2013-03-27 | 哈尔滨汽轮机厂有限责任公司 | Electron beam welding method of gas turbine casing with horizontal flange structure |
| CN104191095A (en) * | 2014-08-04 | 2014-12-10 | 贵州黎阳航空动力有限公司 | Welding process of large-diameter annular part |
| CN110216363A (en) * | 2019-06-25 | 2019-09-10 | 哈尔滨汽轮机厂有限责任公司 | A kind of electro-beam welding method of gas turbine partition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111515563A (en) | 2020-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106392292B (en) | Electron beam welding method for thin-wall part | |
| CN108057952A (en) | A kind of electron beam soldering method of big L/D ratio thin-walled parts | |
| CN105436688A (en) | Vacuum electron beam welding method for variable-thickness ZL114A aluminum alloy | |
| CN102308062A (en) | Turbine wheel and shaft joining processes | |
| CN110125619B (en) | Electron beam welding repair method for large-thickness titanium alloy I-shaped welding part | |
| JP2004306084A (en) | Composite welding method of laser welding and arc welding | |
| CN203863211U (en) | Vacuum electron beam welding system | |
| CN104191095A (en) | Welding process of large-diameter annular part | |
| CN102294545A (en) | Laser penetration welding seam formation control method for Hass alloy conductive roller | |
| CN104942412B (en) | Thin plate back not back chipping technique in a kind of submerged-arc welding | |
| CN111515563B (en) | Vacuum electron beam welding method for oblique welding seam comb tooth part | |
| CN112756788A (en) | Welding process suitable for deep groove between tube plate and heat exchange tube | |
| Lala et al. | Study of hardness of the weld bead formed by partial hybrid welding by metal inert gas welding and submerged arc welding at three different heat inputs | |
| CN111702317A (en) | Electron beam welding method for double-sided planet weld joint structure | |
| CN108714731A (en) | A kind of unclear method for root of submerged-arc welding cut deal | |
| KR101008078B1 (en) | Hybrid Welding Method | |
| CN102554445A (en) | Method for controlling root chained pores in a part with bottom lock structure by using electron beam welding | |
| CN112975178B (en) | Electron beam scanning stirring welding process for upper tube base | |
| CN110560868A (en) | vacuum electron beam welding process for 6-series aluminum alloy sheet | |
| CN113210829B (en) | CuW alloy-Q345D steel integral contact electron beam welding process | |
| CN110560869A (en) | aluminum alloy vacuum electron beam welding method for eliminating root defects | |
| JPH1076363A (en) | Method for improving strength of high energy density heat source weld zone | |
| RU159414U1 (en) | DEVICE FOR CARRYING OUT REPAIR OF METAL STRUCTURES BY SPOT WELDING METHOD | |
| Panella et al. | CDW aluminium joints welding and optimisation with NDT/mechanical testing | |
| CN102478041A (en) | Engine fastener welded by lasers and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |