CN201776592U - Annular seam welding device at the bottom of storage box of carrier rocket - Google Patents
Annular seam welding device at the bottom of storage box of carrier rocket Download PDFInfo
- Publication number
- CN201776592U CN201776592U CN2010205066318U CN201020506631U CN201776592U CN 201776592 U CN201776592 U CN 201776592U CN 2010205066318 U CN2010205066318 U CN 2010205066318U CN 201020506631 U CN201020506631 U CN 201020506631U CN 201776592 U CN201776592 U CN 201776592U
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Abstract
The utility model discloses an annular seam welding device at the bottom of a storage box of a carrier rocket, which comprises two parts of a welding edge inner side resisting device and a welding edge outer side compaction device, wherein the welding edge outer side compaction device compacts welding edges of a circular ring and a section frame from the outer side of the bottom of a box; and the welding edge inner side resisting device compacts the welding edges of the circular ring and the section frame from the inner side of the bottom of the box. The annular seam welding device of the utility model is mainly used for reliably fixing the welding edge of a welding workpiece in the automatic welding process and can remarkably improve the welding efficiency under the premise of ensuring the welding quality.
Description
Technical field
The utility model relates to a kind of device that can be used for the seam welding of carrier rocket tank case base ring.
Background technology
Tank is a structure member maximum in the carrier rocket rocket body structure, be used for storing the liquid hydrogen propellant as pressure vessel, as the main force support structure of rocket, play a part to support thermal protection system (being adiabatic overcoat) and basis and space are installed simultaneously for the other system instrument and equipment provides.
Shown in Fig. 1 a-1b, be called at the bottom of the case at the bottom of the ellipsoid at tank two ends, all adopt the part welding, welding method is argon tungsten-arc welding or Variable Polarity plasma welding.The part of welding has (Fig. 1) such as annulus 3 (6 melon lobes), top cover 2, section bar frame 4 and flanges 1 at the bottom of the case.Weld seam between annulus 3 and the section bar frame 4 is called circumferential weld (as shown in Figure 1a).
Because at the bottom of the case is spheroid, the welding edge zone is a curved surface, therefore welds the clamping difficulty.In automation welding process at the bottom of the case, require annulus 3 and the section bar frame 4 must secure fixation near the welding edge of circumferential welds, accurately alignment, and phenomenon such as misalignment does not appear in welding process.
The utility model content
Present carrier rocket encircling welding equipment is mainly used in manual welding at the bottom of the case, there is the frock heaviness, complex operation, many shortcomings such as the technological preparation time is long, and can not reliably compress the welding edge of part, reach not automation welding requirements at the bottom of the case, so technical problem to be solved in the utility model is to provide a kind of case base ring seam welding device of weldering automatically that can be used for.
The utility model to the fixing main thought in case base ring seam welding limit is: top in the external pressure, and promptly the outside at the bottom of the case compresses the welding edge of annulus and section bar frame, and the inboard at the bottom of the case holds out against the welding edge of annulus and section bar frame.For this reason, the case base ring seam welding device that the utility model provides comprises inboard holding device of welding edge and welding edge outside hold down gag, wherein:
Welding edge outside hold down gag comprises handwheel, push rod mounting disc, double-screw bolt, bidirectional modulation screw rod, the inner tube of a tyre, annulus trim ring and annulus, and push rod mounting disc central authorities are provided with a through hole, can pass the double-screw bolt on the inner tube of a tyre, are placed on the inner tube of a tyre; Handwheel adopts screw thread pair to be connected with double-screw bolt, by rotating handwheel, the push rod mounting disc is fixed, and it axially is not moved at the inner tube of a tyre; The annulus trim ring is arranged on the annulus, and the outer wall ellipsoid bus equation of annulus trim ring inwall and annulus is identical, and the two fits good; Be evenly equipped with 16 bidirectional modulation screw rods on the circumference of push rod mounting disc; One end of bidirectional modulation screw rod and push rod mounting disc are adopted and are spirally connected, and the other end withstands on the annulus trim ring; By rotating the double end nut on the bidirectional modulation screw rod, the bidirectional modulation screw rod can shorten or extend, the annulus trim ring is compressed, thereby outside realizing at the bottom of the case annulus welding edge is compressed;
The inboard holding device of welding edge comprises section bar frame trim ring, bolt, nut and section bar frame, and section bar frame trim ring is arranged on the section bar frame, and section bar frame trim ring inwall is identical with the ellipsoid bus equation of section bar frame outer wall, and the two fits good; Be evenly equipped with 12 through holes on the circumference of section bar frame trim ring, the relevant position of the inner tube of a tyre also is provided with 12 identical through holes; Section bar frame trim ring is placed in two groups of through hole alignment; Bolt passes two groups of through holes, installs nut; By fastening nut, section bar frame trim ring compresses from the outside with the section bar frame gradually.
Also comprise pneumatic piston ring body in the above-mentioned case base ring of the utility model seam welding device, the parting face of pneumatic piston ring body is the C type, adopts the M24 bolt assembly to be screwed onto on the inner tube of a tyre.
In the above-mentioned case base ring of the utility model seam welding device, be bolted with spring base, limited block and fagging on the pneumatic piston ring body; Air bag and slide block all are embedded in the C type groove of pneumatic piston ring body; Draw-bar seat, weldering bushing all are screwed onto on the slide block; Shut for one of air bag, the other end is provided with charging connector, and charging connector leads to compressed air; Be with the compression spring on the pull bar, pull bar inserts spring base, and an end and draw-bar seat are fixed.
Operating process of the present utility model comprises the steps: all to lift section bar frame and annulus on the inner tube of a tyre; Section bar frame trim ring is placed on the section bar frame, tights a bolt, make section bar frame trim ring compress the welding edge of section bar frame from the outside; The annulus trim ring is placed on the annulus, and the push rod mounting disc lifts on the inner tube of a tyre.By adjusting the bidirectional modulation screw rod, make the welding edge of annulus trim ring from outer side compression annulus; Pneumatic piston ring inflation, uniform slide block overhangs gradually on pneumatic piston ring circumference, holds out against the welding edge of annulus and section bar frame from the inboard; The beginning girth welding; Welding finishes, and pneumatic piston ring venting is removed said apparatus and workpiece with this again.
With respect to prior art, this utility model has solved carrier rocket tank case base ring and has stitched a difficult problem in the automatic welding process, strong guarantee making smooth advances of carrier rocket development of new generation.
Description of drawings
Fig. 1 a is the structural representation at the bottom of the common carrier rocket tank case.
Fig. 1 b is the A-A cutaway view of Fig. 1 a.
Fig. 2 a-2c is the structural representation of the utility model case base ring seam welding device.
Fig. 3 a is the structural representation of pneumatic piston ring in the utility model case base ring seam welding device.
Fig. 3 b is the enlarged drawing at A position among Fig. 3 a.
Among Fig. 1 a: 1 is flange; 2 is top cover; 3 are annulus (6 melon lobe weldings form); 4 is the section bar frame;
Among Fig. 2 a-2c: 1 is handwheel; 2 is the push rod mounting disc; 3 is double-screw bolt; 4 is bidirectional modulation screw rod (16); 5 is the inner tube of a tyre; 6 is the annulus trim ring; 7 is section bar frame trim ring; 8 is bolt (12); 9 is nut (12); 10 is pneumatic piston ring; 11 is the section bar frame; 12 are annulus (only showing 1/2); 13 is regulator; 14 is escape pipe; 15 is the double end nut.
Among Fig. 3 a-3b: 1 is the M24 bolt assembly; 2 is pneumatic piston ring body; 3 is air bag; 4 is that slide block 5 is spring base; 6 are the weldering bushing; 7 are the compression spring; 8 is pull bar; 9 is draw-bar seat; 10 is limited block; 11 is fagging; 12 is the inner tube of a tyre; 13 is charging connector.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further set forth the utility model.These embodiment be interpreted as only being used to the utility model is described and be not used in the restriction protection domain of the present utility model.After the content of having read the utility model record, those skilled in the art can make various changes or modifications the utility model, and these equivalences change and modification falls into the utility model claim institute restricted portion equally.
Shown in Fig. 2 a-2c, the case base ring seam welding device that the utility model preferred embodiment provides is made up of two parts: inboard holding device of welding edge and welding edge outside hold down gag, the outside of welding edge outside hold down gag at the bottom of the case compresses the welding edge of annulus 12 and section bar frame 11, the inboard of the inboard holding device of welding edge at the bottom of the case holds out against the welding edge of annulus 12 and section bar frame, wherein:
Welding edge outside hold down gag comprises handwheel 1, push rod mounting disc 2, double-screw bolt 3, bidirectional modulation screw rod 4, the inner tube of a tyre 5, annulus trim ring 6, section bar frame trim ring 7 and bolt etc., there is a through hole in push rod mounting disc 2 central authorities, can pass the double-screw bolt 3 on the inner tube of a tyre 5, be placed on the inner tube of a tyre 5.Handwheel 1 adopts screw thread pair to be connected with double-screw bolt 3, by rotating handwheel 1, push rod mounting disc 2 is fixed, and it axially is not moved at the inner tube of a tyre 5.Annulus trim ring 6 is placed on the annulus 12, and the outer wall ellipsoid bus equation of annulus trim ring 6 inwalls and annulus 12 is identical, and the two fits good.Be evenly equipped with 16 bidirectional modulation screw rods 4 on the circumference of push rod mounting disc 2.One end of bidirectional modulation screw rod 4 and push rod mounting disc 2 are adopted and are spirally connected, and other end tip withstands on the annulus trim ring 6.By rotating the double end nut 15 on the bidirectional modulation screw rod 4, bidirectional modulation screw rod 4 can shorten or extend, annulus trim ring 6 is compressed, thereby finally annulus 12 welding edges are compressed outside realizing at the bottom of the case.
The inboard holding device of welding edge comprises section bar frame trim ring 7, bolt 8, nut 9 and section bar frame 11, and section bar frame trim ring 7 is placed on the section bar frame 11.Section bar frame trim ring 7 inwalls are identical with the ellipsoid bus equation of section bar frame 11 outer walls, and the two fits good.Be evenly equipped with 12 through holes on the circumference of section bar frame trim ring 7, the relevant position of the inner tube of a tyre 5 also is drilled with 12 identical through holes.When placing section bar frame trim ring 7, must be with two groups of hole alignment.Bolt 8 passes two groups of through holes, installs nut 9.By fastening nut 9, section bar frame trim ring 7 compresses from the outside with section bar frame 11 gradually.
In another preferred embodiment of the utility model, the welding edge that the inboard holds out against annulus and section bar frame at the bottom of the case mainly relies on pneumatic piston ring, and shown in Fig. 2 b, pneumatic piston ring body 10 is screwed onto on the inner tube of a tyre.
As shown in Figure 3, the parting face of pneumatic piston ring body 2 is the C type, adopts M24 bolt assembly 1 to be screwed onto on the inner tube of a tyre 12.The part that is screwed onto pneumatic piston ring body 2 comprises: spring base 5, limited block 10, fagging 11.Air bag 3 and slide block 4 all are embedded in the C type groove of pneumatic piston ring body 2.Draw-bar seat 9, weldering bushing 6 all are screwed onto on the slide block 4.The version of air bag 3 is consistent with fire hose, shuts for one, and another has charging connector 13.Charging connector 13 logical compressed air.Be with 1 compression spring 7 on the pull bar 8, pull bar 8 inserts spring base 5, one ends and draw-bar seat 9 is fixing.Fagging 11 is mainly used in and supports annulus (as among Fig. 2 12).
Specify the motion flow of pneumatic piston ring below in conjunction with accompanying drawing:
As shown in Figure 3, compressed air charges in the air bag 3 by charging connector 13, and the air pressure in the air bag 3 raises, and it is big to rise gradually; Under the promotion of air bag 3, the slide block 4 that is embedded in the pneumatic piston ring body 2C type groove overhangs gradually; Compressing spring 7 is simultaneously gradually reduced; When limited block 10 is run in the bottom of slide block 4, slide block 4 stop motions, the inboard holds out against the welding edge of annulus and section bar frame at the bottom of the case; When charging connector 13 venting, the air pressure in the air bag 3 reduce, 7 elongations of compression spring, and under the elastic force of compression spring 7, withdraw the gradually C type groove of pneumatic piston ring body 2 of slide block 4.Simultaneously, air bag 3 is crushed.
Claims (3)
1. a carrier rocket tank case base ring seam welding device is characterized in that, comprises inboard holding device of welding edge and welding edge outside hold down gag, wherein:
Welding edge outside hold down gag comprises handwheel, push rod mounting disc, double-screw bolt, bidirectional modulation screw rod, the inner tube of a tyre, annulus trim ring and annulus, and push rod mounting disc central authorities are provided with a through hole, can pass the double-screw bolt on the inner tube of a tyre, are placed on the inner tube of a tyre; Handwheel adopts screw thread pair to be connected with double-screw bolt, by rotating handwheel, the push rod mounting disc is fixed, and it axially is not moved at the inner tube of a tyre; The annulus trim ring is arranged on the annulus, and the outer wall ellipsoid bus equation of annulus trim ring inwall and annulus is identical, and the two fits good; Be evenly equipped with 16 bidirectional modulation screw rods on the circumference of push rod mounting disc; One end of bidirectional modulation screw rod and push rod mounting disc are adopted and are spirally connected, and the other end withstands on the annulus trim ring; By rotating the double end nut on the bidirectional modulation screw rod, the bidirectional modulation screw rod can shorten or extend, the annulus trim ring is compressed, thereby outside realizing at the bottom of the case annulus welding edge is compressed;
The inboard holding device of welding edge comprises section bar frame trim ring, bolt, nut and section bar frame, and section bar frame trim ring is arranged on the section bar frame, and section bar frame trim ring inwall is identical with the ellipsoid bus equation of section bar frame outer wall, and the two fits good; Be evenly equipped with 12 through holes on the circumference of section bar frame trim ring, the relevant position of the inner tube of a tyre also is provided with 12 identical through holes; Section bar frame trim ring is placed in two groups of through hole alignment; Bolt passes two groups of through holes, installs nut; By fastening nut, section bar frame trim ring compresses from the outside with the section bar frame gradually.
2. case base ring seam welding device according to claim 1 is characterized in that also comprise pneumatic piston ring body, the parting face of pneumatic piston ring body is the C type, adopts the M24 bolt assembly to be screwed onto on the inner tube of a tyre.
3. case base ring seam welding device according to claim 2 is characterized in that, is bolted with spring base, limited block and fagging on the pneumatic piston ring body; Air bag and slide block all are embedded in the C type groove of pneumatic piston ring body; Draw-bar seat, weldering bushing all are screwed onto on the slide block; Shut for one of air bag, the other end is provided with charging connector, and charging connector leads to compressed air; Be with the compression spring on the pull bar, pull bar inserts spring base, and an end and draw-bar seat are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205066318U CN201776592U (en) | 2010-08-24 | 2010-08-24 | Annular seam welding device at the bottom of storage box of carrier rocket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205066318U CN201776592U (en) | 2010-08-24 | 2010-08-24 | Annular seam welding device at the bottom of storage box of carrier rocket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201776592U true CN201776592U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205066318U Expired - Fee Related CN201776592U (en) | 2010-08-24 | 2010-08-24 | Annular seam welding device at the bottom of storage box of carrier rocket |
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| CN (1) | CN201776592U (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837153A (en) * | 2012-08-07 | 2012-12-26 | 首都航天机械公司 | Positioning support device for stir friction welding of storage box cylinder section circular seam |
| CN103464905A (en) * | 2013-09-12 | 2013-12-25 | 上海航天精密机械研究所 | Clamping device adoptable for cutting and welding rocket tank bottom longitudinal seam through laser |
| CN103769730A (en) * | 2014-01-14 | 2014-05-07 | 海宁红狮宝盛科技有限公司 | Circular seam welding tool for enclosed container |
| CN104493372A (en) * | 2014-12-11 | 2015-04-08 | 重庆瑞阳科技开发有限公司 | Welding equipment for axle housing of rear axle |
| CN104625326A (en) * | 2015-02-06 | 2015-05-20 | 中国运载火箭技术研究院 | Spherical box bottom circumferential seam welding method for 5M-grade thin wall storage box |
| CN104646795A (en) * | 2015-02-06 | 2015-05-27 | 中国运载火箭技术研究院 | Welding method for sealing girth of storage tank with diameter of 5M, weak rigidity and small-diameter manhole |
| CN104690471A (en) * | 2015-02-06 | 2015-06-10 | 中国运载火箭技术研究院 | Method for controlling annular gap small clearance of spherical box bottom of 5M-level thin-wall storage box |
| CN104708264A (en) * | 2015-02-06 | 2015-06-17 | 中国运载火箭技术研究院 | Circular seam internal supporting device of storage tank cylinder section |
| CN104772626A (en) * | 2015-04-24 | 2015-07-15 | 艾美特焊接自动化技术(北京)有限公司 | Milling and welding integrated device for upper and lower circular seams in bottom of storage box |
| CN104785999A (en) * | 2015-02-06 | 2015-07-22 | 中国运载火箭技术研究院 | 5M class storage tank sealing circular seam inner supporting device |
| CN105127656A (en) * | 2015-10-14 | 2015-12-09 | 江苏北人机器人系统股份有限公司 | Positioning fixture and storage case girth welding equipment |
| CN105479184A (en) * | 2015-12-30 | 2016-04-13 | 天津航天长征火箭制造有限公司 | Ellipsoidal tank bottom flange hole milling/flange plate welding assembly |
| CN106903519A (en) * | 2015-12-22 | 2017-06-30 | 上海航天设备制造总厂 | It is a kind of to collect milling side and weld the carrier rocket bottom welding tool for friction stir welding for being clamped in one |
| CN107363408A (en) * | 2017-09-05 | 2017-11-21 | 上海航天精密机械研究所 | A kind of high-strength steel sheel circumferential weld hybrid Laser-Arc Welding equipment of guided missile |
| CN107442926A (en) * | 2017-07-27 | 2017-12-08 | 中国航天科技集团公司长征机械厂 | Lock back welding gas-liquid clamping apparatus |
| CN107900509A (en) * | 2017-11-09 | 2018-04-13 | 首都航天机械公司 | The matching tooling and method of a kind of Rocket tank bottom annulus and transition rings |
| CN108480730A (en) * | 2018-05-30 | 2018-09-04 | 中南大学 | The milling clamping tooling of large complicated carved component |
| CN108907593A (en) * | 2018-07-27 | 2018-11-30 | 上海交通大学 | A kind of carrier rocket tank circular seam welding Automated assembly pose_adjuster |
| CN109352244A (en) * | 2018-11-30 | 2019-02-19 | 上海航天精密机械研究所 | Circumferential weld welding equipment device for bearing type spherical shape tank |
| CN109822285A (en) * | 2019-02-13 | 2019-05-31 | 上海交通大学 | A kind of integral type inner support chucking device and its application method for annular construction member |
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| CN114054933A (en) * | 2021-11-29 | 2022-02-18 | 天津航天长征火箭制造有限公司 | Stirring friction welding device for circular seam of top cover without central hole at bottom of box and assembling method |
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2010
- 2010-08-24 CN CN2010205066318U patent/CN201776592U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102837153A (en) * | 2012-08-07 | 2012-12-26 | 首都航天机械公司 | Positioning support device for stir friction welding of storage box cylinder section circular seam |
| CN102837153B (en) * | 2012-08-07 | 2015-11-25 | 首都航天机械公司 | A kind of device for positioning and supporting for the welding of tank cylinder section circumferential weld agitating friction |
| CN103464905A (en) * | 2013-09-12 | 2013-12-25 | 上海航天精密机械研究所 | Clamping device adoptable for cutting and welding rocket tank bottom longitudinal seam through laser |
| CN103464905B (en) * | 2013-09-12 | 2015-12-02 | 上海航天精密机械研究所 | Be applicable to the clamping device of longitudinal joint laser cutting and welding at the bottom of rocket case |
| CN103769730A (en) * | 2014-01-14 | 2014-05-07 | 海宁红狮宝盛科技有限公司 | Circular seam welding tool for enclosed container |
| CN103769730B (en) * | 2014-01-14 | 2015-11-18 | 海宁红狮宝盛科技有限公司 | A kind of closed container girth welding frock |
| CN104493372A (en) * | 2014-12-11 | 2015-04-08 | 重庆瑞阳科技开发有限公司 | Welding equipment for axle housing of rear axle |
| CN104690471A (en) * | 2015-02-06 | 2015-06-10 | 中国运载火箭技术研究院 | Method for controlling annular gap small clearance of spherical box bottom of 5M-level thin-wall storage box |
| CN104708264A (en) * | 2015-02-06 | 2015-06-17 | 中国运载火箭技术研究院 | Circular seam internal supporting device of storage tank cylinder section |
| CN104785999A (en) * | 2015-02-06 | 2015-07-22 | 中国运载火箭技术研究院 | 5M class storage tank sealing circular seam inner supporting device |
| CN104690471B (en) * | 2015-02-06 | 2016-05-25 | 中国运载火箭技术研究院 | The spherical case base ring of a kind of 5M level thin-walled tank stitches little clearance control method |
| CN104646795A (en) * | 2015-02-06 | 2015-05-27 | 中国运载火箭技术研究院 | Welding method for sealing girth of storage tank with diameter of 5M, weak rigidity and small-diameter manhole |
| CN104625326A (en) * | 2015-02-06 | 2015-05-20 | 中国运载火箭技术研究院 | Spherical box bottom circumferential seam welding method for 5M-grade thin wall storage box |
| CN104785999B (en) * | 2015-02-06 | 2017-01-25 | 中国运载火箭技术研究院 | 5M class storage tank sealing circular seam inner supporting device |
| CN104772626A (en) * | 2015-04-24 | 2015-07-15 | 艾美特焊接自动化技术(北京)有限公司 | Milling and welding integrated device for upper and lower circular seams in bottom of storage box |
| CN105127656A (en) * | 2015-10-14 | 2015-12-09 | 江苏北人机器人系统股份有限公司 | Positioning fixture and storage case girth welding equipment |
| CN106903519A (en) * | 2015-12-22 | 2017-06-30 | 上海航天设备制造总厂 | It is a kind of to collect milling side and weld the carrier rocket bottom welding tool for friction stir welding for being clamped in one |
| CN105479184A (en) * | 2015-12-30 | 2016-04-13 | 天津航天长征火箭制造有限公司 | Ellipsoidal tank bottom flange hole milling/flange plate welding assembly |
| CN107442926A (en) * | 2017-07-27 | 2017-12-08 | 中国航天科技集团公司长征机械厂 | Lock back welding gas-liquid clamping apparatus |
| CN107363408A (en) * | 2017-09-05 | 2017-11-21 | 上海航天精密机械研究所 | A kind of high-strength steel sheel circumferential weld hybrid Laser-Arc Welding equipment of guided missile |
| CN107900509A (en) * | 2017-11-09 | 2018-04-13 | 首都航天机械公司 | The matching tooling and method of a kind of Rocket tank bottom annulus and transition rings |
| CN108480730A (en) * | 2018-05-30 | 2018-09-04 | 中南大学 | The milling clamping tooling of large complicated carved component |
| CN108907593B (en) * | 2018-07-27 | 2020-05-29 | 上海交通大学 | Automatic assembly posture adjusting mechanism for carrier rocket tank girth welding |
| CN108907593A (en) * | 2018-07-27 | 2018-11-30 | 上海交通大学 | A kind of carrier rocket tank circular seam welding Automated assembly pose_adjuster |
| CN109352244A (en) * | 2018-11-30 | 2019-02-19 | 上海航天精密机械研究所 | Circumferential weld welding equipment device for bearing type spherical shape tank |
| CN109822285A (en) * | 2019-02-13 | 2019-05-31 | 上海交通大学 | A kind of integral type inner support chucking device and its application method for annular construction member |
| CN109822285B (en) * | 2019-02-13 | 2020-08-04 | 上海交通大学 | Integrated internal supporting and clamping device for annular component and using method thereof |
| CN110340597A (en) * | 2019-06-27 | 2019-10-18 | 西安建筑科技大学 | A kind of inflatable rectangular beam splicing mould and technique |
| CN110340597B (en) * | 2019-06-27 | 2021-09-28 | 西安建筑科技大学 | Inflatable rectangular beam splicing mould and process |
| CN112077368A (en) * | 2020-08-17 | 2020-12-15 | 北京卫星制造厂有限公司 | Multi-degree-of-freedom pull rod posture measuring, adjusting and positioning method |
| CN112077368B (en) * | 2020-08-17 | 2022-01-04 | 北京卫星制造厂有限公司 | Multi-degree-of-freedom pull rod posture measuring, adjusting and positioning method |
| CN114054933A (en) * | 2021-11-29 | 2022-02-18 | 天津航天长征火箭制造有限公司 | Stirring friction welding device for circular seam of top cover without central hole at bottom of box and assembling method |
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