CN103386547A - Magnetic field shielding method for hydraulic body part long-focusing welding - Google Patents
Magnetic field shielding method for hydraulic body part long-focusing welding Download PDFInfo
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- CN103386547A CN103386547A CN2013103037465A CN201310303746A CN103386547A CN 103386547 A CN103386547 A CN 103386547A CN 2013103037465 A CN2013103037465 A CN 2013103037465A CN 201310303746 A CN201310303746 A CN 201310303746A CN 103386547 A CN103386547 A CN 103386547A
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Abstract
The invention provides a magnetic field shielding method for hydraulic body part long-focusing welding. The magnetic field shielding method for hydraulic body part long-focusing welding comprises the following steps of: (a) firstly, arranging an electroforming body part in a demagnetizer for demagnetization, and measuring that the residual magnetism of a hydraulic body part is less than 2*10-4T by a magnetometer after demagnetization; (b) arranging the electroforming body part onto a welding tool, arranging the electroforming body part into a shielding barrel, enabling the bottom edge of the electroforming body part to extend out of the shielding barrel, and carrying out butt joint on the electroforming body part and a stainless steel flange plate to be welded; and (c) during electron beam welding, putting the stainless steel flange plate below, and carrying out forward-direction welding. According to the magnetic field shielding method for hydraulic body part long-focusing welding, which is disclosed by the invention, the shielding barrel made of material with the better magnet insulation performance is additionally arranged out of the electroforming body part to shield the influence of the magnetic field, and the shielding barrel is made of iron material to eliminate the interference of the magnetic field. According to the magnetic field shielding method, the electron beam passes through the whole electroforming body part height during welding to form long-focusing welding, a front part with a well-formed welding line can be effectively kept during postwelding lathing by adopting the welding mode, and the quality reliability of the hydraulic body part is improved.
Description
Technical field
The invention belongs to the magnetic field shielding method of easily with magnetoelectricity casting nickel material long-focus, welding, be specifically related to a kind of hydraulic pressure body minister and focus on the magnetic field shielding method of welding, with carrying out smoothly of the product electron beam weldings such as assurance hydraulic pressure body section.
Background technology
Thrust chamber hydraulic pressure body section is the critical component of engine, as shown in Figure 1, steel flange dish 1 adopts electro-beam welding method to be connected with electroforming body section 2, be welded as counter direction welding, steel flange dish 1 is upper, and the gas-flow of HTHP high speed and the vibratory impulse that produces thereof bear in the hydraulic pressure body section after connection.Restriction due to electron beam welding in early stage equipment, adopt the shorter medium-pressure type welding machine of focal length to carry out counter direction welding always, the problem that exists be mainly weld seam fuse the follow-up machined of the upper end head of a nail part time be removed, may produce and stay the weld seam nail tip part that is partially welded defect, reduce Joint Reliability.During due to manufacturing, the copper alloy inwall numerical control milling of first electroforming body section at rotary press modelling processes cooling duct, then powers in cooling duct and casts out the nickel metal outer wall, forms the cooling sandwich of regeneration, the characteristics of electroformed nickel material processing, inevitably can produce certain magnetic.Find by measurement, the electroforming body section band quantity of magnetism is 2 * 10
-4T to 5 * 10
-4T is larger on the electron beam welding impact.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic pressure body minister to focus on the magnetic field shielding method of welding, it installs the shielding cylinder of making than good material every magnetic property additional outside electroforming body section, can guarantee the electron beam welding quality of product.
Realize the technical scheme of the object of the invention: a kind of hydraulic pressure body minister focuses on the magnetic field shielding method of welding, and the method adopts electro-beam welding method to be connected with electroforming body section on the steel flange dish, forms hydraulic pressure body section, and it comprises the steps:
(a) at first the electroforming body is deployed in the demagnetizer processing of demagnetizing, adopted magnetometer survey hydraulic pressure body section remanent magnetism less than 2 * 10 after demagnetization
-4T；
(b) the electroforming body is deployed on welding tooling, electroforming body section is placed in shielding cylinder, shielding cylinder extends in base in electroforming body section, and with steel flange dish to be welded, docks;
(c) when carrying out electron beam welding, the steel flange dish under, be the forward welding.
A kind of hydraulic pressure body minister as above focuses on the magnetic field shielding method of welding, and its described shielding cylinder is the tubular profile, for pure iron or L3 ferroalloy materials are made.
A kind of hydraulic pressure body minister as above focuses on the magnetic field shielding method of welding, and its described shielding cylinder thickness is 8mm～12mm.
A kind of hydraulic pressure body minister as above focuses on the magnetic field shielding method of welding, and its described demagnetizer is three phase full wave rectification/ultralow frequency demagnetizer.
Effect of the present invention is: the present invention uses in additional one of electroforming body section the shielding cylinder of making than good material every magnetic property, carrys out the impact of armoured magnetic field.Shielding cylinder adopts ferrous material, solves the interference in magnetic field.During electron beam welding of the present invention, electron beam has passed through whole electroforming body section height, has formed long focusing welding, and such welding manner can effectively keep the good positive position of appearance of weld when the postwelding Vehicle Processing, lifting hydraulic pressure body section reliability.
Description of drawings
Fig. 1 is existing hydraulic pressure body section electron beam welding schematic diagram;
Fig. 2 is the magnetic field shielding method schematic diagram that hydraulic pressure body minister of the present invention focuses on welding.
In figure: 1. steel flange dish; 2. electroforming body section; 3. position while welding; 4. electron beam; 5. bundle spot; 6. shielding cylinder.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the magnetic field shielding method that a kind of hydraulic pressure body minister of the present invention focuses on welding is further described.
As shown in Figure 2, a kind of hydraulic pressure body minister of the present invention focuses on the magnetic field shielding method of welding, and the method adopts electro-beam welding method to be connected with electroforming body section 2 on steel flange dish 1, forms hydraulic pressure body section, and it comprises the steps:
(a) at first electroforming body section 2 is placed in the demagnetizer processing of demagnetizing, demagnetizer is three phase full wave rectification/ultralow frequency demagnetizer, adopts magnetometer survey hydraulic pressure body section remanent magnetism less than 2 * 10 after demagnetization
-4T；
(b) electroforming body section 2 is placed on welding tooling, electroforming body section 2 is placed in shielding cylinder 6, shielding cylinder 6 extends in 2 bases in electroforming body section, and with steel flange dish 1 to be welded, docks;
(c) when carrying out electron beam welding, steel flange dish 1 under, be the forward welding.
Described shielding cylinder is the tubular profile, for pure iron or L3 ferroalloy materials are made.Described shielding cylinder thickness be 8mm～12mm(for example: 8mm, 10mm or 12mm).
The selection of shielding cylinder 6 materials in the present invention: the magnetic conductivity of iron is several thousand times of air, belong to high permeability material, by checking repeatedly, find the more satisfactory every the magnetic effect of pure iron or this bi-material of L3, therefore select ferrous material processing screening arrangement, and finally be applied in the welding of hydraulic pressure body section.Simultaneously, according to the design feature of hydraulic pressure body section, the screening arrangement of design is the tubular profile, and the internal diameter design of shielding cylinder can drop down onto electroforming body section in the time of should meeting its installation and press close to root, and is convenient to reserve the path spacing of restrainting under electron beam more, plays a protective role simultaneously.The Thickness Design of shielding cylinder need to be taken into account the effect (thickness is larger, and effect is better) of magnetic field shielding, and avoids blocking of butt welded seam zone, and preferred shielding cylinder thickness is 10mm.The height of shielding cylinder wants to cover the height of whole hydraulic pressure body section, is subject to the impact in magnetic field while avoiding electronic beam current to run through whole body section, generally is not less than 600mm.
Adopt demagnetizer to demagnetize to electroforming body section in the present invention, the measurement result surface part band quantity of magnetism is not more than 2 * 10
-4T, should meet the requirements according to welding standard.
Claims (4)
1. a hydraulic pressure body minister focuses on the magnetic field shielding method of welding, and the method adopts electro-beam welding method to be connected with electroforming body section (2) on steel flange dish (1), forms hydraulic pressure body section, it is characterized in that, the method comprises the steps:
(a) at first electroforming body section (2) is placed in the demagnetizer processing of demagnetizing, adopts magnetometer survey hydraulic pressure body section remanent magnetism less than 2 * 10 after demagnetization
-4T；
(b) electroforming body section (2) is placed on welding tooling, electroforming body section (2) is placed in shielding cylinder (6), shielding cylinder (6) extends in base in electroforming body section (2), and with steel flange dish (1) to be welded, docks;
(c) when carrying out electron beam welding, steel flange dish (1) under, be the forward welding.
2. a kind of hydraulic pressure body minister according to claim 1 focuses on the magnetic field shielding method of welding, it is characterized in that: described shielding cylinder (6) is the tubular profile, for pure iron or L3 ferroalloy materials are made.
3. a kind of hydraulic pressure body minister according to claim 1 and 2 focuses on the magnetic field shielding method of welding, it is characterized in that: described shielding cylinder (6) thickness is 8mm～12mm.
4. a kind of hydraulic pressure body minister according to claim 1 and 2 focuses on the magnetic field shielding method of welding, it is characterized in that: described demagnetizer is three phase full wave rectification/ultralow frequency demagnetizer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103037465A CN103386547A (en) | 2013-07-18 | 2013-07-18 | Magnetic field shielding method for hydraulic body part long-focusing welding |
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|---|---|---|---|
| CN2013103037465A CN103386547A (en) | 2013-07-18 | 2013-07-18 | Magnetic field shielding method for hydraulic body part long-focusing welding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228433A (en) * | 2014-07-02 | 2016-01-06 | 西安航空动力股份有限公司 | A kind of method for vacuum electron beam welder magnetic field shielding |
| CN106286180A (en) * | 2016-10-17 | 2017-01-04 | 哈尔滨工业大学 | The magnetic field shielding case of cusped magnetic field thruster |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09206959A (en) * | 1996-01-30 | 1997-08-12 | Mitsubishi Heavy Ind Ltd | Electron beam welding method between different kinds of material |
| CN2863344Y (en) * | 2005-11-08 | 2007-01-31 | 中国航空工业第一集团公司北京航空制造工程研究所 | Pipe-plate structure piece clamper for vacuum electron beam braze welding |
| CN101078693A (en) * | 2006-05-23 | 2007-11-28 | 胜利钢管有限公司 | Device for eliminating X ray checking image distortion resulting from steel pipe remanence |
| CN102019492A (en) * | 2010-11-18 | 2011-04-20 | 中国石化集团第十建设公司 | Demagnetizing and deflective blow preventing device of pipeline welding line |
| CN102091867A (en) * | 2011-01-06 | 2011-06-15 | 大连理工大学 | Method for welding nuclear main pump shielding can |
-
2013
- 2013-07-18 CN CN2013103037465A patent/CN103386547A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09206959A (en) * | 1996-01-30 | 1997-08-12 | Mitsubishi Heavy Ind Ltd | Electron beam welding method between different kinds of material |
| CN2863344Y (en) * | 2005-11-08 | 2007-01-31 | 中国航空工业第一集团公司北京航空制造工程研究所 | Pipe-plate structure piece clamper for vacuum electron beam braze welding |
| CN101078693A (en) * | 2006-05-23 | 2007-11-28 | 胜利钢管有限公司 | Device for eliminating X ray checking image distortion resulting from steel pipe remanence |
| CN102019492A (en) * | 2010-11-18 | 2011-04-20 | 中国石化集团第十建设公司 | Demagnetizing and deflective blow preventing device of pipeline welding line |
| CN102091867A (en) * | 2011-01-06 | 2011-06-15 | 大连理工大学 | Method for welding nuclear main pump shielding can |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228433A (en) * | 2014-07-02 | 2016-01-06 | 西安航空动力股份有限公司 | A kind of method for vacuum electron beam welder magnetic field shielding |
| CN106286180A (en) * | 2016-10-17 | 2017-01-04 | 哈尔滨工业大学 | The magnetic field shielding case of cusped magnetic field thruster |
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Application publication date: 20131113 |