CN104475934A - Welding process for ensuring smooth transition and molding of ellipsoidal circular seam and auxiliary welding clamp thereof - Google Patents
Welding process for ensuring smooth transition and molding of ellipsoidal circular seam and auxiliary welding clamp thereof Download PDFInfo
- Publication number
- CN104475934A CN104475934A CN201410668122.8A CN201410668122A CN104475934A CN 104475934 A CN104475934 A CN 104475934A CN 201410668122 A CN201410668122 A CN 201410668122A CN 104475934 A CN104475934 A CN 104475934A
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- CN
- China
- Prior art keywords
- welding
- joint
- spheroid
- welded
- clamp
- Prior art date
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
The invention discloses a welding process for ensuring smooth transmission and molding of an ellipsoidal circular seam. The welding process comprises the following steps: 1) pre-setting a welding groove structure; 2) assembling a joint and an ellipsoid to an auxiliary welding clamp as follows: butting the ellipsoid with a to-be-welded end surface of the joint, adhering the ellipsoid with the lower part of a positioning block fixed on a core rod by virtue of an ellipsoidal pressure plate, adhering the joint with the upper part of the positioning block by virtue of a joint pressure plate, and ensuring a circular seam to-be-welded part of the ellipsoid and the joint to be corresponding to an arc-shaped groove on a ring-shaped copper pad in the middle of the positioning block; 3) respectively performing positioned welding, non-wired backing welding, wired cosmetic welding, non-wired re-melting welding; and 4) slowly cooling and performing annealing thermal treatment. The invention further discloses an auxiliary welding clamp designed for realizing the method. By pre-setting the welding groove structure and the auxiliary welding clamp, dislocation caused by welding shrinkage of the ellipsoidal surface can be balanced out reversely, and the inner surface of the welding seam can be ensured to be molded very well.
Description
Technical field
The invention belongs to welding technology field; be specifically related to a kind ofly guarantee the welding procedure that girth welding rounding off is shaping and auxiliary welding clamp, particularly relate to and a kind ofly guarantee the welding procedure that burning chamber shell ellipsoid girth welding rounding off is shaping and auxiliary welding clamp.
Background technology
Burning chamber shell is the vitals of rocket engine, for storing powder column and making powder column ignition, HTHP effect is born in the rocket course of work, generally formed by joint, spheroid, cylinder welding, after its spheroid and the girth joint of joint adopt usual mode to weld, because welding is shunk and distortion, position while welding can present the larger systolic depression to enclosure interior, affects housing explosive payload and serviceability.
Summary of the invention
The object of the present invention is to provide a kind of welding procedure that burning chamber shell ellipsoid girth welding rounding off is shaping of guaranteeing, this process is by presetting the groove type of dislocation docking, do not add a backing welding, add wire bond, remelting welds three layers of welding, ensure that burning chamber shell ellipsoid girth welding rounding off is shaping.
Another object of the present invention is to provide a kind of for realizing the auxiliary welding clamp that said welding method designs.
For realizing above-mentioned first object, welding procedure of the present invention comprises the steps:
1) preset bevel for welding structure: prepare ring joint and spheroid according to the dimensional requirement of burning chamber shell, the end face to be welded of joint and spheroid offers the bevel groove of the welding that cooperatively interacts respectively;
2) joint and spheroid are assembled on auxiliary welding clamp: first spheroid is set on the plug in the middle of clamp base, and by spheroid pressing plate, are fitted in spheroid and the locating piece bottom be fixed on plug; Then joint is passed plug, its end face to be welded is docked with the end face to be welded of spheroid, and by joint pressing plate, fitted in joint and locating piece top, and guarantee that spheroid is corresponding with the arc groove on the annular copper packing be arranged in the middle part of locating piece with the circumferential weld of joint place to be welded;
3) tack welding, butt joint groove inclined-plane and spheroid groove inclined-plane position weldering, the long 5 ~ 20mm of tack weld, and interval 30 ~ 100mm, locates symmetrically and evenly;
4) clamp nut of releasable joint pressing plate;
5) welding, adopts the welding of automatic tungsten anode argon arc welding method, welds three times altogether, and first pass, for not add a backing welding, for adding a cosmetic welding, welds for not adding a remelting for the 3rd time for second time;
6) slow cooling, removes welding auxiliary clamp after postwelding part at room temperature cools naturally;
7) postwelding carries out annealing heat treatment, eliminates welding stress, namely obtains burning chamber shell ellipsoid.
Further, described step 1) in, the end face to be welded of joint and spheroid all opens the bevel of root face that width is 1mm ~ 2mm and 30 ~ 40 °, and circumferential weld place to be welded joint outer surface is higher than spheroid outer surface, ensure to be greater than spheroid place to be welded diameter of section at the joint of circumferential weld joint place to be welded diameter of section, the root face of joint during Butt Assembling is overlapped on the groove inclined-plane of spheroid.
For realizing above-mentioned second object, the auxiliary welding clamp of the present invention's design, it comprises clamp base, plug is provided with in the middle of described clamp base, described plug lower end screw thread matches with the screw in clamp base, and described plug threaded upper ends matches with clamp nut, and described plug is provided with locating piece, the middle part of described locating piece is equipped with annular copper packing, and described annular copper packing is provided with arc groove;
It also comprises spheroid pressing plate and joint pressing plate; Described spheroid pressing plate when spheroid to be welded is set on plug and its press fit, and is connected as a single entity by follower bolt assembly and clamp base, thus is fitted in spheroid and locating piece bottom; Described joint pressing plate joint to be welded through plug docking spheroid time and its press fit, and by the clamp nut locking on plug, thus fitted in joint and locating piece top, and guarantee that spheroid is corresponding with the arc groove on annular copper packing with the circumferential weld of joint place to be welded.
Further, described locating piece top and joint joint place are also provided with dismountable adjustment pad.
Further, described adjustment pad is in the shape of falling disc.
Technique effect of the present invention is embodied in:
1) preset the bevel for welding of the docking that misplaces, oppositely offset the dislocation that ellipsoid causes because of welding contraction.
2) adopt special auxiliary welding clamp, ensure that weld seam inner surface is shaping, control welding deformation direction.
3) after tack welding, the clamp nut of releasable joint pressing plate carries out girth welding again, avoids joint thrust to make bending deformation in weld seam;
5) weld first pass for not add a backing welding, pin welded joint is overlapped in the wedge angle on spheroid groove.
6) method provided by the invention is simple, can adapt to produce in enormous quantities.
Accompanying drawing explanation
Fig. 1 is that the present invention utilizes the scheme of erection welded when auxiliary clamp welds.
The enlarged drawing of I part in I Fig. 1 of Fig. 2.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is auxiliary welding clamp of the present invention and scheme of erection.Fig. 2 is shell joint and spheroid girth joint position partial enlarged drawing.
From Fig. 1, 2 can find out, before burning chamber shell joint 1 and spheroid 2 weld, first the bevel for welding of dislocation docking will be preset, structure is as Fig. 1, shown in 2, the end face to be welded of spheroid 2 and shell joint 1 all opens 1mm root face, the bevel at 36 ° of angles, ensure at circumferential weld joint (i.e. place to be welded), the diameter of section of shell joint 1 is greater than the diameter of section of spheroid 2, namely the inwall of joint spheroid 2 projects downwards the inner face (near plug) that the inwall that is positioned at shell joint 1 projects downwards, the outer wall of shell joint 1 projects downwards the outside (away from plug) that the outer wall that is positioned at spheroid 2 projects downwards, the root face of joint during Butt Assembling is overlapped on the groove inclined-plane of spheroid.
During welding, first shell joint 1 and spheroid 2 are assembled to welding auxiliary clamp, described auxiliary welding clamp is by holder clamp base 3, the plug 4 of support and positioning fixture central role has been provided with in the middle of described clamp base 3, described plug 4 lower end screw thread matches with the screw in clamp base 3, described plug 4 threaded upper ends matches with clamp nut 11, described plug 4 is provided with the locating piece 6 of the position effect of positioning housing joint 1 and spheroid 2, the middle part of described locating piece 6 is equipped with annular copper packing 5, described annular copper packing 5 is provided with arc groove 5.1.
It also comprises spheroid pressing plate 8 and joint pressing plate 7; Described spheroid pressing plate 8 when spheroid 2 to be welded is set on plug 4 and its press fit, and is connected as a single entity by follower bolt assembly 10 and clamp base 3, thus is fitted in spheroid 2 and locating piece 6 bottom; Described joint pressing plate 7 is when joint to be welded 1 docks spheroid 2 through plug 4 and its press fit, and locked by the clamp nut 11 on plug 4, thus fitted in joint 1 and locating piece 6 top, and guarantee that the circumferential weld of spheroid 2 and joint 1 place to be welded is corresponding with the arc groove 5.1 on annular copper packing 5.
Conveniently adjust the dislocation height between shell joint 1 and spheroid 2, described locating piece 6 top and joint 1 joint place are also provided with dismountable adjustment pad 9, like this, according to the adjustment pad 9 of the supplied materials condition selecting different-thickness of two parts or adjustment pad 9 can not added.
Assembly method is as follows: be first set on by spheroid 2 on the plug 4 in the middle of clamp base 3, and by spheroid pressing plate 8, spheroid 2 is fitted with the bottom of the locating piece 6 be fixed on plug 4; Then joint 1 is passed plug 4, its end face to be welded is docked with the end face to be welded of spheroid 2, and by joint pressing plate 7, fitted in joint 1 and locating piece 6 top, and guarantee that the circumferential weld of spheroid 2 and joint 1 place to be welded is corresponding with the arc groove 5.1 on the annular copper packing 5 be arranged in the middle part of locating piece 6; Weld root (inner surface) convex in arc-shaped that the material melted during welding is formed after the cooling period can be made like this, play the effect making weld seam inner surface fast cooling shaping.
Then following steps are carried out successively:
1) tack welding, the groove inclined-plane of butt joint 1 and the groove inclined-plane of spheroid 2 position weldering, the long 5 ~ 20mm of tack weld, and interval 30 ~ 100mm, locates symmetrically and evenly;
2) clamp nut 11 of releasable joint pressing plate 7;
3) welding, adopts the welding of automatic tungsten anode argon arc welding method, welds three times altogether, and first pass, for not add a backing welding, for adding a cosmetic welding, welds for not adding a remelting for the 3rd time for second time;
4) slow cooling, removes welding auxiliary clamp after postwelding part at room temperature cools naturally;
5) postwelding carries out annealing heat treatment, eliminates welding stress, namely obtains burning chamber shell ellipsoid.
Under the cooperation of above-mentioned auxiliary welding clamp, the inventive method effectively can ensure that burning chamber shell ellipsoid girth welding rounding off is shaping.
Claims (5)
1. guarantee to it is characterized in that the welding procedure that burning chamber shell ellipsoid circumferential weld rounding off is shaping: comprise the steps:
1) preset bevel for welding structure: prepare ring joint and spheroid according to the dimensional requirement of burning chamber shell, the end face to be welded of joint and spheroid offers the bevel groove of the welding that cooperatively interacts respectively;
2) joint and spheroid are assembled on auxiliary welding clamp: first spheroid is set on the plug in the middle of clamp base, and by spheroid pressing plate, are fitted in spheroid and the locating piece bottom be fixed on plug; Then joint is passed plug, its end face to be welded is docked with the end face to be welded of spheroid, and by joint pressing plate, fitted in joint and locating piece top, and guarantee that spheroid is corresponding with the arc groove on the annular copper packing be arranged in the middle part of locating piece with the circumferential weld of joint place to be welded;
3) tack welding, butt joint groove inclined-plane and spheroid groove inclined-plane position weldering, the long 5 ~ 20mm of tack weld, and interval 30 ~ 100mm, locates symmetrically and evenly;
4) clamp nut of releasable joint pressing plate;
5) welding, adopts the welding of automatic tungsten anode argon arc welding method, welds three times altogether, and first pass, for not add a backing welding, for adding a cosmetic welding, welds for not adding a remelting for the 3rd time for second time;
6) slow cooling, removes welding auxiliary clamp after postwelding part at room temperature cools naturally;
7) postwelding carries out annealing heat treatment, eliminates welding stress, namely obtains burning chamber shell ellipsoid.
2. guarantee the welding procedure that burning chamber shell ellipsoid circumferential weld rounding off is shaping according to claim 1, it is characterized in that: the end face to be welded of described joint and spheroid all opens the bevel of root face that width is 1mm ~ 2mm and 30 ~ 40 °, and circumferential weld place to be welded joint outer surface is higher than spheroid outer surface, ensure to be greater than spheroid place to be welded diameter of section at the joint of circumferential weld joint place to be welded diameter of section, the root face of joint during Butt Assembling is overlapped on the groove inclined-plane of spheroid.
3. one kind for realizing the auxiliary welding clamp that welding procedure described in claim 1 designs, it comprises clamp base (3), it is characterized in that: in the middle of described clamp base (3), be provided with plug (4), described plug (4) lower end screw thread matches with the screw in clamp base (3), described plug (4) threaded upper ends matches with clamp nut (11), described plug (4) is provided with locating piece (6), the middle part of described locating piece (6) is equipped with annular copper packing (5), described annular copper packing (5) is provided with arc groove (5.1),
It also comprises spheroid pressing plate (8) and joint pressing plate (7); Described spheroid pressing plate (8) is set on when plug (4) is gone up and its press fit at spheroid (2) to be welded, and be connected as a single entity by follower bolt assembly (10) and clamp base (3), thus fitted in spheroid (2) and locating piece (6) bottom; Described joint pressing plate (7) joint (1) to be welded through plug (4) docking spheroid (2) time and its press fit, and by clamp nut (11) locking on plug (4), thus fitted in joint (1) and locating piece (6) top, and guarantee that the circumferential weld place to be welded of spheroid (2) and joint (1) is corresponding with the arc groove (5.1) on annular copper packing (5).
4. auxiliary welding clamp according to claim 3, is characterized in that: described locating piece (6) top and joint (1) joint place are also provided with dismountable adjustment pad (9).
5. auxiliary welding clamp according to claim 4, is characterized in that: described adjustment pad (9) is in the shape of falling disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410668122.8A CN104475934A (en) | 2014-11-20 | 2014-11-20 | Welding process for ensuring smooth transition and molding of ellipsoidal circular seam and auxiliary welding clamp thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410668122.8A CN104475934A (en) | 2014-11-20 | 2014-11-20 | Welding process for ensuring smooth transition and molding of ellipsoidal circular seam and auxiliary welding clamp thereof |
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| CN104475934A true CN104475934A (en) | 2015-04-01 |
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| CN201410668122.8A Pending CN104475934A (en) | 2014-11-20 | 2014-11-20 | Welding process for ensuring smooth transition and molding of ellipsoidal circular seam and auxiliary welding clamp thereof |
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| CN106271338A (en) * | 2016-10-20 | 2017-01-04 | 四川明日宇航工业有限责任公司 | Annular panel beating case weld fixture |
| CN106392434A (en) * | 2016-11-30 | 2017-02-15 | 中航动力股份有限公司 | Welding fixture for once clamping multiple short ring parts |
| CN106624535A (en) * | 2016-11-10 | 2017-05-10 | 哈尔滨建成集团有限公司 | Special welding fixture for shell and installation plate |
| CN106624275A (en) * | 2016-10-20 | 2017-05-10 | 四川明日宇航工业有限责任公司 | Annular metal plate shell welding method |
| CN107931943A (en) * | 2017-11-29 | 2018-04-20 | 西安航天动力机械有限公司 | A kind of frock assembled for end socket with flange welding |
| CN108098218A (en) * | 2017-12-08 | 2018-06-01 | 四川航天长征装备制造有限公司 | Empennage seat positioning welding fixture |
| CN109014708A (en) * | 2018-06-27 | 2018-12-18 | 芜湖职业技术学院 | Weld clamping device and welder |
| CN109352194A (en) * | 2018-12-06 | 2019-02-19 | 中国航发贵州黎阳航空动力有限公司 | A kind of welding method of accumulator package |
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| CN110560989A (en) * | 2019-07-25 | 2019-12-13 | 武汉船用机械有限责任公司 | welding tool and welding method for cylinder body part |
| CN110614415A (en) * | 2018-10-08 | 2019-12-27 | 上海航天精密机械研究所 | Automatic welding device for titanium alloy thin-wall spherical shell |
| CN110977110A (en) * | 2019-12-28 | 2020-04-10 | 天津航天长征火箭制造有限公司 | Butt welding method and device for spherical top cover assembly |
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| CN106624535B (en) * | 2016-11-10 | 2018-07-31 | 哈尔滨建成集团有限公司 | A kind of shell welds special fixture with mounting plate |
| CN106624535A (en) * | 2016-11-10 | 2017-05-10 | 哈尔滨建成集团有限公司 | Special welding fixture for shell and installation plate |
| CN106392434A (en) * | 2016-11-30 | 2017-02-15 | 中航动力股份有限公司 | Welding fixture for once clamping multiple short ring parts |
| CN107931943A (en) * | 2017-11-29 | 2018-04-20 | 西安航天动力机械有限公司 | A kind of frock assembled for end socket with flange welding |
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