CN107825046B - Welding tool and welding method for thin-wall corrugated pipe sheet - Google Patents
Welding tool and welding method for thin-wall corrugated pipe sheet Download PDFInfo
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- CN107825046B CN107825046B CN201711295069.1A CN201711295069A CN107825046B CN 107825046 B CN107825046 B CN 107825046B CN 201711295069 A CN201711295069 A CN 201711295069A CN 107825046 B CN107825046 B CN 107825046B
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- 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
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The invention discloses a welding tool and a welding method for a thin-wall corrugated pipe diaphragm. According to the welding method, the inner circle welding tool designed by outer circle positioning and the outer circle welding tool designed by outer circle positioning are used, the high-precision pre-welding assembly requirement of the thin-wall corrugated pipe diaphragm within the thickness range of (0.1-0.5) mm can be met, and the requirements of welding on indexes such as gaps, step differences and coaxiality are met.
Description
Technical Field
The invention relates to a welding technology, in particular to a welding tool for a thin-wall corrugated pipe diaphragm and a using method.
Background
The corrugated pipe is a key structural member of a pressurized conveying system of a carrier rocket and is generally formed by welding dozens of thin-wall metal diaphragms (0.1-0.5) mm with an upper cover and a base. Welding is a key process for manufacturing the thin-wall corrugated pipe, the quality of welding directly determines the use performance of the corrugated pipe, once one welding seam is broken, the core function is lost, and the success or failure of rocket launching is directly influenced. In the welding of the thin-wall corrugated pipe, welding methods such as micro-beam TIG, micro-beam plasma arc and vacuum electron beam are mostly adopted at present.
Due to the thin wall thickness of the bellows diaphragm, high requirements are placed on pre-weld assembly in order to ensure good weld quality, and this is typical of precision welding. If the control of the gap, the step difference and the like between the diaphragm and the diaphragm before welding is not good, the problems of molten pool collapse, poor weld forming, asymmetric welding mushroom and the like are easily caused, the characteristics of the product such as appearance, sealing property, fatigue, strength, vibration and the like can not meet the design requirements directly, and the yield is low. Therefore, aiming at the special welding requirements of the thin-wall corrugated pipe diaphragm, a simple and easy-to-use diaphragm inner and outer circle welding tool is developed, the requirements of diaphragm welding on indexes such as gaps, step differences, coaxiality and the like are met, high-precision high-quality welding of the thin-wall corrugated pipe diaphragm is achieved, and the tool has important significance for improving the welding quality and the qualified rate of products.
Disclosure of Invention
The invention solves the problems of easy molten pool collapse, poor weld seam forming, unsymmetrical mushroom welding and low yield in the existing thin-wall corrugated pipe welding.
In order to solve the problems, the invention provides a welding tool for a thin-wall corrugated pipe diaphragm. The tool comprises a thin-wall corrugated pipe diaphragm inner circle welding tool and a thin-wall corrugated pipe outer circle welding tool. Interior circular welding frock includes interior circular welding frock base, interior circular welding frock compact heap and elbow clamp, wherein, interior circular welding frock base includes circle in die cavity excircle and the die cavity, and the circle constitutes the containing structure who holds the diaphragm with the die cavity excircle in the die cavity under the condition that containing structure holds the diaphragm, interior circular welding frock compact heap compresses tightly the diaphragm in this containing structure, the elbow presss from both sides the winding the die cavity excircle set up in the edge of interior circular welding frock base gives interior circular welding frock compact heap effort is so that the compact heap compresses tightly the diaphragm. The excircle welding tool comprises an excircle welding tool base, a gasket, a cushion block, an excircle welding tool pressing block and a bolt, wherein the excircle welding tool base is provided with a central shaft, and the gasket, the cushion block and the excircle welding tool pressing block are assembled on the central shaft through the bolt.
The invention also provides a welding method. The method comprises the following steps: the method comprises the following steps: firstly, welding the inner circles of thin-wall corrugated pipe diaphragms, arranging two diaphragms in an inner circle welding tool base, positioning by virtue of the outer circle to ensure that the inner circles are aligned, adopting an elbow clamp for pressing in a tight fit mode between an inner circle welding tool pressing block and the inner circle welding tool base to realize welding of inner circle welding seams and form a diaphragm pair; secondly, placing a gasket between two diaphragms of the diaphragm pair, then sequentially placing the diaphragm pair on a base of an excircle welding tool, and tightly pressing the diaphragm pair by adopting an excircle welding tool pressing block to slightly clamp a bolt; and finally, the excircle alignment and the rounding of the diaphragm pair are adjusted by taking the excircles of the base, the cushion block and the pressing block as references, and then the bolts are fastened to weld the excircles.
Compared with the prior art, the invention has at least the following advantages:
1. by using the tool, the high-precision pre-welding assembly requirement of the thin-wall corrugated pipe diaphragm within the thickness range of (0.1-0.5) mm can be met by using the inner circle welding tool designed for outer circle positioning and the outer circle welding tool designed for outer circle positioning, and the requirements of welding on indexes such as gaps, step differences, coaxiality and the like are met;
2. by using the tool, the supporting and limiting functions of the steps, chamfers or arcs at the end parts of the welding tool gasket on the welding seam are adopted, so that the problems of welding seam collapse, mushroom welding asymmetry, poor welding seam forming and the like can be effectively prevented;
3. the operation is simple and convenient, the assembly reliability and the repeatability are good, and the method can be used for batch production. .
Drawings
FIG. 1 is a schematic structural diagram of an inner circle welding tool of the welding tool for the thin-wall corrugated pipe diaphragm;
FIG. 2 is a schematic structural diagram of an excircle welding tool of the welding tool for the thin-wall corrugated pipe diaphragm; .
Detailed Description
For the purpose of illustrating the technical content, the constructional features, the achieved objects and the effects of the invention in detail, reference will be made to the following detailed description of the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 2, the welding tool for the thin-wall corrugated pipe diaphragm of the present invention includes an inner circle welding tool 1 and an outer circle welding tool 2. The inner circle welding tool 1 comprises an inner circle welding tool base 11, an inner circle welding tool pressing block 12 and an elbow clamp 13. The inner circle welding tooling base 11 comprises a cavity outer circle 111 and a cavity inner circle 112. The inner circle 112 of the cavity and the outer circle of the cavity form a step structure. The diaphragm is positioned on a step formed by the outer circle 111 of the cavity and the inner circle 112 of the cavity. Of course, it will be understood by those skilled in the art that the inner circle of the cavity and the outer circle of the cavity may also form other shapes of receiving structures to receive the diaphragm. The inner circle welding tool pressing block 12 presses the diaphragm on the step (accommodating structure). The elbow clamp 13 winds the outer circle 111 of the cavity and is evenly arranged at the edge of the welding tool base 11, and the acting force of the inner circle welding tool pressing block 12 is applied to the inner circle welding tool pressing block 12 in a pressing mode. In the embodiment, the diameter of the outer circle 111 of the cavity is larger than the outer diameter of the diaphragm and ranges from 0 mm to 0.5 mm. The diameter of the inner circle 112 of the cavity is larger than the inner diameter of the diaphragm, and the range is (3.5-6.5) delta, wherein delta is the thickness of the diaphragm. The outer diameter of the inner circle welding tool pressing block 12 is in close fit with the inner circle welding tool base 11. The outer diameter of the inner circle welding tool pressing block 12 is smaller than the diameter of the outer circle 111 of the cavity, and the range is (0-0.5) mm.
With reference to fig. 1 to 2, the outer circle welding tool 2 includes an outer circle welding tool base 21, a gasket 22, a cushion block 23, an outer circle welding tool pressing block 24, and a bolt 25. The outer circle welding tool base 21 comprises a base body 212 and a central shaft 211 extending from the base body 212. The central shaft 211 has a bolt hole 214 in an end surface 213 facing the base body 212. The gasket 22 is hollow and cylindrical and has an end structure 221 on its outer surface. The end surface 213 of the center shaft 211 protrudes from the hollow portion of the spacer 22 (fig. 2 illustrates a shape in which a plurality of spacers 22 are stacked together). The spacer 23 is annular and is located at an end portion of the base body 212 opposite to the central axis 211. The excircle welding frock compact heap 24 is provided with the bolt hole that runs through itself. The bolt 25 is fastened to the bolt hole of the cross section 213 of the center shaft 211 through the bolt hole of the pressing block 24, whereby the spacer 22, the spacer 23, and the pressing block 24 are assembled to the center shaft 211. The length of the diaphragm extending out of the gasket 22 is within a range of delta (3.5-6.5), wherein delta is the thickness of the diaphragm. In one embodiment, the spacer 22 is a chamfered end structure, and the membrane extends 5 δ out of the spacer 22, but the skilled person will appreciate that the length may also be 3.5 δ, 3.6 δ, 3.7 δ, 4 δ, 4.2 δ, 4.4 δ, 4.7 δ, 4.9 δ, 5 δ, 5.2 δ, 5.7 δ, 5.9 δ, 6.2 δ, 6.4 δ, 6.5 δ. In other embodiments, the outer circumferential end of the spacer 22 is in a step shape, a chamfer shape or an arc shape, and may be in other shapes as long as the length of the diaphragm extending out of the spacer 22 is within the above range. The inner diameter of the cushion block 23 is larger than the outer diameter of a central shaft 211 of the excircle welding tool base 21, and the range is (0-0.6) mm. The inner diameter of the outer circle welding tool pressing block 24 is larger than the outer diameter of the central shaft 211 of the inner circle welding tool base 21, and the range is (0-0.6) mm. When the diaphragm, the gasket and the cushion block are all assembled on the central shaft 211 of the inner circle welding tooling base 21, the sum of the lengths of the diaphragm, the gasket and the cushion block is greater than the length (3-5) mm of the central shaft 211 of the base.
Referring to fig. 1 to 2, the method for welding by using the tool of the present invention includes the following steps:
firstly, welding the inner circles of thin-wall corrugated pipe diaphragms, placing the two diaphragms in a containing structure (step) formed by a cavity inner circle 112 and a cavity outer circle 111 of an inner circle welding tool base 11, ensuring the inner circles to be aligned by virtue of outer circle positioning, adopting an elbow clamp 13 to compress the inner circle welding seam between an inner circle welding tool compressing block 12 and the base 11 in a tight fit mode, and forming a diaphragm pair;
secondly, placing a gasket 22 between two diaphragms of the diaphragm pair, then sequentially placing the diaphragm pair on a base 21 of the excircle welding tool 2 (namely, all the diaphragm pairs and the gaskets 22 are sleeved on a central shaft 211), and tightly pressing by adopting the cushion block 23 and the pressing block 24 to slightly bring a bolt 25;
and finally, the excircle alignment and the rounding of the diaphragm pair are adjusted by taking the excircles of the base 21, the cushion block 23 and the pressing block 24 as references, and then the bolts are fastened for excircle welding.
Claims (10)
1. A welding tool for a thin-wall corrugated pipe diaphragm is characterized by comprising an inner circle welding tool and an outer circle welding tool for the thin-wall corrugated pipe diaphragm, wherein,
the inner circle welding fixture comprises an inner circle welding fixture base, an inner circle welding fixture pressing block and an elbow clamp, wherein the inner circle welding fixture base comprises a cavity outer circle and a cavity inner circle, the cavity inner circle and the cavity outer circle form a containing structure for containing a diaphragm, the inner circle welding fixture pressing block presses the diaphragm to the containing structure under the condition that the containing structure contains the diaphragm, the elbow clamp is arranged at the edge of the inner circle welding fixture base around the cavity outer circle, and acting force is applied to the inner circle welding fixture pressing block to enable the pressing block to press the diaphragm;
the excircle welding tool comprises an excircle welding tool base, a gasket, a cushion block, an excircle welding tool pressing block and a bolt, wherein the excircle welding tool base is provided with a central shaft, and the gasket, the cushion block and the excircle welding tool pressing block are assembled on the central shaft through the bolt.
2. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the diameter of the excircle of the cavity of the inner circle welding tool is larger than the outer diameter of the diaphragm and ranges from 0 mm to 0.5 mm;
the diameter of the inner circle of the cavity of the inner circle welding tool is larger than the inner diameter of the diaphragm, the range is (3.5-6.5) delta, and delta is the thickness of the diaphragm.
3. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the outer diameter of the inner circle welding tool pressing block is smaller than the diameter of the outer circle of the cavity of the inner circle welding tool base, and the range is (0-0.5) mm.
4. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the outer diameter of a central shaft of the outer circle welding tool base is smaller than the inner diameter of the diaphragm, and the range is (2-5) mm.
5. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the gasket is in a hollow cylindrical shape, the outer surface of the gasket is provided with an end structure, and the end part of the outer circle is in a step shape, a chamfer shape or an arc shape.
6. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the inner diameter of the cushion block is larger than the outer diameter of a central shaft of the excircle welding tool base, and the range is (0-0.6) mm.
7. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the inner diameter of the outer circle welding tool pressing block is larger than the outer diameter of a central shaft of the inner circle welding tool base, and the range is (0-0.6) mm.
8. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: when the diaphragm, the gasket and the cushion block are all assembled on the central shaft of the inner circle welding tool base, the sum of the lengths of the diaphragm, the gasket and the cushion block is larger than the length (3-5) mm of the central shaft of the base.
9. The welding fixture for thin-wall corrugated pipe membranes as claimed in claim 1, which is characterized in that: the receiving structure is a stepped structure.
10. A welding method using the welding tool of any one of claims 1 to 9, characterized by: the method comprises the following steps:
firstly, welding the inner circles of thin-wall corrugated pipe diaphragms, arranging two diaphragms in an inner circle welding tool base, positioning by virtue of the outer circle to ensure that the inner circles are aligned, adopting an elbow clamp for pressing in a tight fit mode between an inner circle welding tool pressing block and the inner circle welding tool base to realize welding of inner circle welding seams and form a diaphragm pair;
secondly, placing a gasket between two diaphragms of the diaphragm pair, then sequentially placing the diaphragm pair on a base of an excircle welding tool, and tightly pressing the diaphragm pair by adopting an excircle welding tool pressing block to slightly clamp a bolt;
and finally, the excircle alignment and the rounding of the diaphragm pair are adjusted by taking the excircles of the base, the cushion block and the pressing block as references, and then the bolts are fastened to weld the excircles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295069.1A CN107825046B (en) | 2017-12-08 | 2017-12-08 | Welding tool and welding method for thin-wall corrugated pipe sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295069.1A CN107825046B (en) | 2017-12-08 | 2017-12-08 | Welding tool and welding method for thin-wall corrugated pipe sheet |
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| Publication Number | Publication Date |
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| CN107825046A CN107825046A (en) | 2018-03-23 |
| CN107825046B true CN107825046B (en) | 2019-12-31 |
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| CN201711295069.1A Active CN107825046B (en) | 2017-12-08 | 2017-12-08 | Welding tool and welding method for thin-wall corrugated pipe sheet |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110883477B (en) * | 2019-11-15 | 2021-11-05 | 安徽普源分离机械制造有限公司 | Upper cover comprehensive welding tool |
| CN111098008B (en) * | 2019-12-13 | 2021-12-07 | 上海航天设备制造总厂有限公司 | Method for protecting gas on back of welding seam of corrugated pipe diaphragm |
| CN111098001A (en) * | 2019-12-16 | 2020-05-05 | 上海航天设备制造总厂有限公司 | Method for automatically assembling and welding inner circle of diaphragm |
| CN111590186B (en) * | 2020-05-29 | 2022-02-22 | 西安西材三川智能制造有限公司 | Welding method for dissimilar metal material membrane component |
| CN113634892B (en) * | 2021-08-13 | 2023-09-26 | 南京晨光集团有限责任公司 | Laser welding device and method for thin-wall corrugated membrane for aerospace capsule |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3918622A (en) * | 1974-03-25 | 1975-11-11 | Bailey Meter Co | Metal bellows welder |
| CN201841375U (en) * | 2010-10-31 | 2011-05-25 | 安徽友特自动化设备有限公司 | Automatic welding workbench for outer diameter of corrugated pipe |
| CN201841376U (en) * | 2010-10-31 | 2011-05-25 | 安徽友特自动化设备有限公司 | Automatic welding workbench for internal diameter of bellows |
| CN102615455B (en) * | 2012-04-18 | 2015-04-08 | 东莞埃欧热能技术有限公司 | Inner and outer circle welding benches for sheet of heat exchanger |
| CN203541918U (en) * | 2013-11-05 | 2014-04-16 | 中国航天科技集团公司长征机械厂 | Device for rapidly positioning, clamping and welding corrugated plates |
| CN206455327U (en) * | 2016-12-30 | 2017-09-01 | 合肥宁泰真空设备有限公司 | A kind of vacuum equipment bellows section of jurisdiction internal diameter welder |
| CN206455356U (en) * | 2016-12-30 | 2017-09-01 | 合肥宁泰真空设备有限公司 | A kind of vacuum equipment bellows section of jurisdiction external diameter welder |
| CN206747834U (en) * | 2017-05-10 | 2017-12-15 | 陕西智拓固相增材制造技术有限公司 | Bellows-welding diaphragm and welding tooling |
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- 2017-12-08 CN CN201711295069.1A patent/CN107825046B/en active Active
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