CN102794610A - Method for processing thin wall welder cases of revolving body structures - Google Patents
Method for processing thin wall welder cases of revolving body structures Download PDFInfo
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- CN102794610A CN102794610A CN2012103061667A CN201210306166A CN102794610A CN 102794610 A CN102794610 A CN 102794610A CN 2012103061667 A CN2012103061667 A CN 2012103061667A CN 201210306166 A CN201210306166 A CN 201210306166A CN 102794610 A CN102794610 A CN 102794610A
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Abstract
The invention discloses a method for processing thin wall welder cases of revolving body structures, belonging to the technical field of aero-engine metal plate forming and welding. According to the invention, a whole pre-deformation welding/forming method is used for solving the problems that sizes of mounting edges are out of tolerance, coaxiality of front and rear mounting edges with main bodies after welding is out of tolerance and residual stress distribution of welding components is unbalanced. The method provided by the invention comprises the following steps of: carrying out technological structure welding deformation allowance compensation design on a mounting edge and a main body of a thin wall welder case before the welding according to the plastic deformation characteristics of materials; plastically forming an expansion block according to an expander work part, size and final structural size requirement of parts; carrying out automatic argon arc welding on the mounting edge and the main body; assembling the welded welder case and expansion block on the expander work part to carry out expansion plastic forming and controlling the expansion forming size through adjusting pressure of the expander; and unloading the pressure of the expander, recovering the expander work part and unloading the parts to complete the welding/forming process.
Description
Technical field
The invention belongs to the aero-engine panel beating and be shaped and welding manufacturing technology field, particularly relate to a kind of processing method of rotary structure thin walled welds casing, be applied to manufacturing with forward and backward installation limit, thin walled welds case structure housing.
Background technology
The most outstanding in the mill technical problem of welding casing (as shown in Figure 1) of rotary structure is the problem of forward and backward installation limit and main body axiality, and these quality problems can be brought like the variation of engine operation cross section of fluid channel, erection stress and cause the serial problems that influence engine performance such as distortion.Analyze the out-of-alignment reason mainly from welding deformation and the distortion of heat treatment process additional stress; Because welding and heat treatment process are the material hot procedures, distortion is difficult to artificial control, and this problem perplexs the technical staff always for a long time; Do not find a practical effective solution; Can only rely on and strengthen the machine-finish allowance that the limit is installed, the limit dimension compensation is installed in follow-up machining, solve limit partial assembled physical dimension is installed.At present; Existing processing method is generally: the woollen surplus that leaves large-size on the limit is being installed; Mainly be through surplus structure compensation welding deformation, the method for removing the lot of materials surplus through machining again guarantees to install the assembly structure size on limit, and in fact such processing method has just solved installation limit assembly structure size; The disalignment problem still exists on limit and the agent structure installing; Fundamentally do not solve the welding deformation problem, distortion still exists on the casing agent structure after the welding, influences the runner characteristic such as casing main body welding deformation; The inner uneven stress of weld seam exists internal stress release to cause phase accessory distortion hidden danger after assembling, influences engine and uses.
Summary of the invention
Welding casing to existing rotary structure is installed limit self dimension overproof; It is overproof with the main body axiality that forward and backward installation side weld connects the back; And the unbalanced problem of weld assembly residual stress distribution, the present invention provides a kind of processing method of rotary structure thin walled welds casing.This method adopts whole predeformation welding/manufacturing process, has solved the problem on deformation that the engine erection stress possibly cause.
To achieve these goals, the present invention adopts following technical scheme, and a kind of processing method of rotary structure thin walled welds casing comprises the steps:
Step 1:, limit and thin-walled casing main process structure welding deformation surplus Compensation Design are installed before the welding according to the material plastic deformation characteristic;
Step 2:, carry out the bloated block structure design of Plastic Forming according to machine operate portions fit dimension and the part final structure dimensional requirement of swelling;
Step 3: limit and main body assembling argonaut welding is installed connects;
Step 4: the wheel chamber casing after will welding is together with bloated packaged fitting on the machine operate portions that swells, and the Plastic Forming that swells is through the adjusting machine pressure control forming dimension that swells that swells;
Step 5: unload the machine pressure that swells, regain the machine operate portions that swells, unload part, accomplish a welding/forming process.
What the present invention adopted is whole predeformation welding/manufacturing process, is to use the plastic deformation effect that thin-wall stamping part swells and is shaped and produces, and solves the distortion and the internal residual stress problem of bonding machine box structure; Simultaneously; The technical process that swells produces plastic deformation, makes weld seam internal stress and heat treatment additional deformation stress distribution even, and inside reaches the stress equilibrium state; Bonding machine box structure characteristic is more stable, avoids assembling in the use because residual stress discharges the influence of distortion to engine.
Beneficial effect of the present invention:
The present invention utilizes technological design in advance that limit and agent structure size are installed, and the process of welding casing welding deformation and balance residual stress (welding deformation and heat treatment additional deformation stress) through the plastic forming process solution that swells in conjunction with the welding back solves the overproof and residual stress imbalance problem of thin walled welds casing welding back axiality; It specifically has following advantage:
1) the invention solves the limit self-deformation problem of installing; Welding deformation has been proofreaied and correct in the shaping plastic deformation through swelling; Make installation limit physical dimension reach production engineering specifications; Solve the forward and backward installation side weld of welding casing simultaneously and connect concentricity problem, promptly solved the technical conditions requirements such as physical dimension, shape and runner characteristic of part, improved the crudy of part;
2) it is little to adopt processing method installation side weld of the present invention to connect distortion; Through technological design the limit physical dimension is installed and reduces that (prior art design is installed side weld and met the monolateral at least 3～5mm of deformation-compensated surplus; Technological design of the present invention is installed side weld and is met the monolateral 1mm of deformation-compensated surplus), improved forging the woollen utilization rate in limit has been installed;
3) the bonding machine box structure size through the present invention processing is good, when carrying out machining, has reduced clamping tool centering time; It is few that the woollen surplus in limit is installed, and reduced machining cutting force, reduced part deformation and residual stress, improved welding casing mechanical processing quality and working (machining) efficiency greatly.
Description of drawings
Fig. 1 is the structural representation of typical case's welding casing;
Fig. 2 is for using the structural representation that the woolen cloth of casing is welded in traditional processing method processing;
Fig. 3 is for using the structural representation that the woolen cloth of casing is welded in processing method processing of the present invention;
Fig. 4 is for using the structural representation of the welding casing after processing method of the present invention is processed;
Among the figure, the limit is installed before the 1-, the 2-main body is installed the limit behind the 3-.
The specific embodiment
A kind of processing method of rotary structure thin walled welds casing comprises the steps:
Step 1: the material that present embodiment is selected is gh3128, judges that according to the plastic deformation characteristic of selecting for use material welding contracted quantity (being welding deformation amount) is 1.5mm, and the welding deformation amount on the diametric(al) is 3mm; Limit and the design of welding casing size of main body structure compensation are installed; Design and make the forward and backward installation limit and the inner flow passage main body of little surplus structure; Compare with the woolen cloth of traditional diamond-making technique: the diameter dimension of main body subtracts 3; The diameter dimension that the non-processing part on limit is installed subtracts 3, and surplus subtracts 2, and the diameter dimension on whole forward and backward installation limit subtracts 5; That is: preceding installation limit is of a size of Ф 456mm, and the back is installed the limit and is of a size of Ф 430mm, and main body is of a size of Ф 466mm.
Step 2:, carry out the bloated block structure design of Plastic Forming according to machine operate portions fit dimension and the part final structure dimensional requirement of swelling;
The machine operate portions that swells fit dimension: Ф 300mm,
Part final structure dimensional requirement: preceding installation limit Ф 456mm, limit Ф 430mm is installed in the back, main body Ф 465.95 ± 0.1mm,
The final piece working face of confirming to expand is of a size of 464.4mm.
Step 3: carry out forward and backward installation limit and thin-walled main body assembling argonaut welding and connect; Welding surface cleaning before before welding, welding is wiped impurity and dirt with emery cloth polishing welding surface and with acetone or absolute alcohol.
Cleaning tool: emery cloth, granularity: 80～120, cleaning agent: acetone or absolute alcohol.
Welding parameter is selected in the welding procedure standard specification according to welding position material trademark and thickness, and the welding parameter that present embodiment adopts is:
Welding wire: HGH3536, Ф 1.2～1.6mm;
Tungsten electrode diameter: Ф 3.0mm;
Welding current: 50～70A;
Protection argon flow amount: welding gun, 8～12L/min, reverse protection, 6～10L/min.
Step 4: the wheel chamber casing after will welding is together with bloated packaged fitting on the machine operate portions that swells, and the Plastic Forming that swells is through the adjusting machine pressure control forming dimension that swells that swells; Integral body swells and is shaped the welding casing to the technological design size, and outer profile size meets the requirement of design final size.
Equipment: 150 tons of hydraulic pressure machine that swells; Frock: piece expands; Pressure swells: 15 tons.
Step 5: unload the machine pressure that swells, regain the machine operate portions that swells, unload part, accomplish a welding/forming process.
The present invention adopts forward and backward installation limit, main body interior diameter process to leave the design of bulging surplus, finally guarantees physical dimension through the Accurate Shaping that swells after the Combination Welding, has solved installation limit axiality and self welding deformation problem.Simultaneously; Proofreaied and correct the strain that welding stress produces through the swell plastic deformation of technology of integral body; Make the transformation for stress of all uneven distributions in edge of welding generation become stress, reduced part in use because residual stress discharges the deformation level that causes along Zhou Junbu.
As shown in Figure 2: traditional processing method is employed in and strengthens woollen surplus on the forward and backward installation limit, and the compensation welding deformation amount is removed a large amount of woollen surpluses after the welding through the method for machining, the one-sided surplus 4mm in limit is installed.Because main body promptly is design final structure size before welding with the external diameter that the limit is installed, its welding deformation can't be eliminated, and the woollen machining of big surplus has reduced production efficiency, is prone to produce the cutting deformation residual stress, uses to part and brings hidden danger.
As shown in Figure 3: processing method of the present invention adopts whole predeformation welding/forming process, dwindles limit and the technological design of thin-walled main body interior diameter are installed, and the woollen size design of having refined has improved stock utilization.Process through swelling and being shaped solves welding deformation comprehensively, solves the limit self-deformation is installed, and solves forward and backward installation limit and main body axiality problem, the homogenising welding stress.Little surplus machining has improved production efficiency, has reduced machining distortion residual stress.
As shown in Figure 4: welding casing welding back distortion makes part appearance profile size conforms design drawing structural requirement through the manufacturing process that swells; Simultaneously, make welding stress reach internal balance through the plastic deformation that swells.Forward and backward installation limit outside dimension is shaped through swelling and reaches the final accurate dimension of project organization, solves welding deformation.After swelling, the internal diameter size on forward and backward installation limit leaves the monolateral 1mm of machine-finish allowance.
Claims (1)
1. the processing method of a rotary structure thin walled welds casing is characterized in that, comprises the steps:
Step 1:, limit and thin-walled casing main process structure welding deformation surplus Compensation Design are installed before the welding according to the material plastic deformation characteristic;
Step 2:, carry out the bloated block structure design of Plastic Forming according to machine operate portions fit dimension and the part final structure dimensional requirement of swelling;
Step 3: limit and main body assembling argonaut welding is installed connects;
Step 4: the wheel chamber casing after will welding is together with bloated packaged fitting on the machine operate portions that swells, and the Plastic Forming that swells is through the adjusting machine pressure control forming dimension that swells that swells;
Step 5: unload the machine pressure that swells, regain the machine operate portions that swells, unload part, accomplish a welding/forming process.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143885A (en) * | 2013-02-07 | 2013-06-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for processing split thin-walled parts |
| CN103537876A (en) * | 2013-10-30 | 2014-01-29 | 北京航天新风机械设备有限责任公司 | Processing method of titanium alloy double-curvature rotary drum |
| CN103551770A (en) * | 2013-11-18 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method and tooling for controlling deformation of nickel-based ageing-strengthening high-temperature alloy casing welding assembly |
| CN104199383B (en) * | 2014-08-05 | 2017-01-11 | 南京航空航天大学 | Aviation engine case part milling blank automatic generation method |
| CN106475611A (en) * | 2016-11-22 | 2017-03-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of automatic compensation processing method of annular web class foundry goods |
| CN106925868A (en) * | 2015-12-31 | 2017-07-07 | 中核建中核燃料元件有限公司 | A kind of cylinder and otic placode welding method |
| CN108262591A (en) * | 2017-01-04 | 2018-07-10 | 东北林业大学 | A kind of five shaft vertical turning-milling complex processing method of aero-engine casing |
| CN108941875A (en) * | 2018-09-05 | 2018-12-07 | 中国航发动力股份有限公司 | A kind of processing method controlling annular Thin-Wall Outer Casing welding deformation amount |
| CN109604950A (en) * | 2018-12-06 | 2019-04-12 | 重庆天骄航空动力有限公司 | A kind of processing method of aero-engine casing |
| CN110253233A (en) * | 2019-07-22 | 2019-09-20 | 湖南南方通用航空发动机有限公司 | A kind of processing technology for casing class part |
| CN114210999A (en) * | 2021-11-29 | 2022-03-22 | 西安航天发动机有限公司 | Integral manufacturing method for multilayer thin-wall streamline structure valve shell |
| CN115740638A (en) * | 2022-11-30 | 2023-03-07 | 沈阳飞机工业（集团）有限公司 | Method for manufacturing titanium alloy crossed integrated structural member |
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| CN1026470C (en) * | 1991-04-10 | 1994-11-09 | 哈尔滨工业大学 | Double-layer spherical container integral expansion making method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143885A (en) * | 2013-02-07 | 2013-06-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for processing split thin-walled parts |
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| CN103537876A (en) * | 2013-10-30 | 2014-01-29 | 北京航天新风机械设备有限责任公司 | Processing method of titanium alloy double-curvature rotary drum |
| CN103537876B (en) * | 2013-10-30 | 2016-05-25 | 北京航天新风机械设备有限责任公司 | Titanium alloy Double curve degree rotating cylinder processing method |
| CN103551770A (en) * | 2013-11-18 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method and tooling for controlling deformation of nickel-based ageing-strengthening high-temperature alloy casing welding assembly |
| CN103551770B (en) * | 2013-11-18 | 2015-07-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Method and tooling for controlling deformation of nickel-based ageing-strengthening high-temperature alloy casing welding assembly |
| CN104199383B (en) * | 2014-08-05 | 2017-01-11 | 南京航空航天大学 | Aviation engine case part milling blank automatic generation method |
| CN106925868A (en) * | 2015-12-31 | 2017-07-07 | 中核建中核燃料元件有限公司 | A kind of cylinder and otic placode welding method |
| CN106475611A (en) * | 2016-11-22 | 2017-03-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of automatic compensation processing method of annular web class foundry goods |
| CN106475611B (en) * | 2016-11-22 | 2018-09-18 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of automatic compensation processing method of annular web class casting |
| CN108262591A (en) * | 2017-01-04 | 2018-07-10 | 东北林业大学 | A kind of five shaft vertical turning-milling complex processing method of aero-engine casing |
| CN108941875A (en) * | 2018-09-05 | 2018-12-07 | 中国航发动力股份有限公司 | A kind of processing method controlling annular Thin-Wall Outer Casing welding deformation amount |
| CN109604950A (en) * | 2018-12-06 | 2019-04-12 | 重庆天骄航空动力有限公司 | A kind of processing method of aero-engine casing |
| CN110253233A (en) * | 2019-07-22 | 2019-09-20 | 湖南南方通用航空发动机有限公司 | A kind of processing technology for casing class part |
| CN114210999A (en) * | 2021-11-29 | 2022-03-22 | 西安航天发动机有限公司 | Integral manufacturing method for multilayer thin-wall streamline structure valve shell |
| CN114210999B (en) * | 2021-11-29 | 2023-04-14 | 西安航天发动机有限公司 | Integral manufacturing method of multilayer thin-wall streamline structure valve shell |
| WO2023093906A1 (en) * | 2021-11-29 | 2023-06-01 | 西安航天发动机有限公司 | Multi-layer thin-wall streamline structure valve housing integral manufacturing method |
| CN115740638A (en) * | 2022-11-30 | 2023-03-07 | 沈阳飞机工业（集团）有限公司 | Method for manufacturing titanium alloy crossed integrated structural member |
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Application publication date: 20121128 |