CN104209616A - Welding method of vacuum bottom cover assembly - Google Patents
Welding method of vacuum bottom cover assembly Download PDFInfo
- Publication number
- CN104209616A CN104209616A CN201410381279.2A CN201410381279A CN104209616A CN 104209616 A CN104209616 A CN 104209616A CN 201410381279 A CN201410381279 A CN 201410381279A CN 104209616 A CN104209616 A CN 104209616A
- Authority
- CN
- China
- Prior art keywords
- vacuum
- silver brazing
- connection tube
- welding method
- vacuum connection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
- B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
Abstract
The invention discloses a welding method of a vacuum bottom cover assembly. The vacuum bottom cover assembly comprises a vacuum bottom cover and a vacuum connecting pipe. The welding method comprises the following steps: S1, sleeving the outer wall of the vacuum connecting pipe with a silver brazing ring, wherein the silver brazing ring is connected with the vacuum connecting pipe in an interference fit manner; S2, pressing one end of the vacuum connecting pipe into a through hole of the vacuum bottom cover, and pressing the silver brazing ring into the top of the through hole; S3, heating the silver brazing ring by using a heating device to enable the heating device and the silver brazing ring to rotate relatively. According to the welding method of the vacuum bottom cover assembly, air leakage of products and waste of welding materials caused by non-uniform charging are avoided, the sealing property of a vacuum cavity is improved, the welding materials are saved, the skill requirement on an operator is reduced, and the qualification rate of the products is improved.
Description
Technical field
The present invention relates to a kind of welding method of vacuum bottom assembly.
Background technology
As shown in Figure 1, vacuum bottom assembly comprises vacuum bottom 2 ' and vacuum connection tube 1 ', the bottom of this vacuum bottom 2 ' is provided with the through hole 21 ' be connected with a vacuum chamber, the material of this vacuum bottom 2 ' is stainless steel, one end of this vacuum connection tube 1 ' is connected with this vacuum chamber, and the material of this vacuum connection tube 1 ' is copper.At present, the welding method of traditional vacuum bottom assembly comprises the following steps: first, vacuum connection tube 1 ' is pressed in the through hole 21 ' of vacuum bottom 2 '; Then, a silver brazing bar 3 ' is positioned over this through hole; Finally, a heater is used at through hole apart from the heating of this silver brazing bar 3 ' place.But there is following technical problem in the welding method of traditional vacuum bottom assembly:
(1) easily reinforced uneven during welding, reinforced less position, intensity is lower and easy to crack, thus product is leaked gas, and reinforced more position, causes great waste;
(2), in manual welding process, use heating devices heat on the other hand, another hand adds silver brazing bar, wholeheartedly dual-purpose, easily makes a fault, and Qualified Products Rate is lower.
Prior art
Vacuum connection tube: 1 '
Vacuum bottom: 2 ' through hole: 21 '
Silver brazing bar: 3 '
The present invention
Vacuum connection tube: 1
Vacuum bottom: 2 through holes: 21
Silver brazing circle: 3
Shell body: step part on 4: 41 downstairs shape portions: 42
Inner bag: 5
Vacuum chamber: 6
Summary of the invention
The technical problem to be solved in the present invention is that in the welding method in order to overcome vacuum bottom assembly traditional in prior art, Qualified Products Rate is lower, product easily leaks gas, easily cause the defects such as the waste of solder, provides a kind of welding method of vacuum bottom assembly.
The present invention solves above-mentioned technical problem by following technical proposals:
A kind of welding method of vacuum bottom assembly, this vacuum bottom assembly comprises vacuum bottom and vacuum connection tube, the bottom of this vacuum bottom is provided with the through hole be connected with a vacuum chamber, the material of this vacuum bottom is stainless steel, one end of this vacuum connection tube is connected with this vacuum chamber, and the material of this vacuum connection tube is copper, its feature is, this welding method comprises the following steps:
S
1, a silver brazing snare is located on the outer wall of this vacuum connection tube, wherein, this silver brazing circle and this vacuum connection tube are that interference fit is connected;
S
2, one end of this vacuum connection tube is pressed in the through hole of this vacuum bottom, and this silver brazing circle is pressed into the top of this through hole;
S
3, use this silver brazing circle of a heating devices heat, and make this heater and this silver brazing circle have a relative rotary motion.
In this programme, silver pricker is uniformly distributed on the outer wall of vacuum connection tube, make to feed in raw material evenly during welding, avoid the waste of product gas leakage because reinforced inequality causes and solder, improve the sealing property of vacuum chamber, save solder, and reduce the skill set requirements to operating personnel, improve the qualification rate of product.
Preferably, in step S
1in, the shape of this silver brazing circle is annular, the internal diameter 0.1mm larger than the diameter of this vacuum connection tube of this silver brazing circle.
In this programme, adopt above-mentioned welding method, make this silver brazing circle to be closely fitted on the outer wall of vacuum connection tube, the uniformity of feeding in raw material when ensureing welding, be convenient to the welding effect improving welding vacuum connection tube and vacuum bottom.
Preferably, in step S
1in, the shape of the cross section of this silver brazing circle is circular, and the diameter of this cross section is 1.1mm-1.3mm.
In this programme, adopt above-mentioned welding method, not only avoid because of the reinforced less phenomenon causing commissure to occur crackle, also avoid because of the reinforced more solder waste caused, improve the sealing property of vacuum chamber.
Preferably, the diameter of this cross section is 1.2mm.
In this programme, when the diameter of cross section is 1.2mm, the sealing property of vacuum chamber and production cost are all suitable.
Preferably, in step S
3in, this heater and this silver brazing circle have a relative rotary motion and specifically comprise the following steps:
S
31, fix this heater;
S
32, the overall center line around this vacuum connection tube of this silver brazing circle, vacuum bottom and vacuum connection tube is rotated.
In this programme, adopt above-mentioned welding method, ensure that stable speed of welding in welding process, ensure that the uniformity of weld seam, thus improve the welding quality of commissure, and then improve the sealing property of vacuum chamber.
Preferably, in step S
3in, this heater and this silver brazing circle have a relative rotary motion and specifically comprise the following steps:
S
31', entirety fixes this silver brazing circle, vacuum bottom and vacuum connection tube;
S
32', this heater is rotated around the center line of this vacuum connection tube.
In this programme, adopt above-mentioned welding method, ensure that stable speed of welding in welding process, ensure that the uniformity of weld seam, thus improve the welding quality of commissure, and then improve the sealing property of vacuum chamber.
Preferably, in step S
3in, the relative rotation angle speed of this relative rotary motion is (pi/2-4 π) rad/s.
In this programme, the relative rotation angle speed of relative rotary motion is (pi/2-4 π) rad/s, not only avoid the problem causing solder sputter to go out because relative rotation angle speed is excessive, also avoid and cause vacuum bottom and vacuum connection tube to occur burn-off phenomenon because relative rotation angle speed is too small.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can be combined, obtain the preferred embodiments of the invention.
Positive progressive effect of the present invention is:
Present invention, avoiding the waste of product gas leakage because reinforced inequality causes and solder, improve the sealing property of vacuum chamber, save solder, and reduce the skill set requirements to operating personnel, improve the qualification rate of product.
Accompanying drawing explanation
Fig. 1 is the using state schematic diagram of the welding method of existing vacuum bottom assembly.
Fig. 2 is the using state schematic diagram of the welding method of the vacuum bottom assembly of present pre-ferred embodiments.
Fig. 3 is the front view corresponding with Fig. 2.
Fig. 4 is the using state schematic diagram of vacuum bottom assembly.
Fig. 5 is the front view corresponding with Fig. 4.
Fig. 6 is the structural representation of the vacuum bottom assembly after cutting off vacuum connection tube.
Description of reference numerals:
Detailed description of the invention
Lift preferred embodiment below, and come by reference to the accompanying drawings clearlyer intactly the present invention to be described.
In describing the invention, it will be appreciated that, term " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
Embodiment 1
As illustrated in figures 4-5, vacuum plant comprises a vacuum bottom assembly, shell body 4 and an inner bag 5, and the top of shell body 4 is provided with step part 41, and bottom is provided with downstairs shape portion 42.Wherein, the outer wall of the bottom of inner bag 5 is connected by welded seal with the inwall in downstairs shape portion 42, and around being formed with a vacuum chamber 6 between inner bag 5 and shell body 4.
In addition, this vacuum bottom assembly comprises vacuum bottom 2 and vacuum connection tube 1, the outer wall of vacuum bottom 2 is connected by welded seal with the inwall of upper step part 41, the bottom of vacuum bottom 2 is provided with the through hole 21 be connected with vacuum chamber 6, and one end of vacuum connection tube 1 is connected with this vacuum chamber 6, the other end is connected with evacuator.Wherein, the material of vacuum bottom 2 is stainless steel, and the material of vacuum connection tube 1 is copper.
In the use procedure of reality, in order to improve the sealing property of this vacuum plant, need to ensure the welded seal effect between vacuum connection tube 1 and vacuum bottom 2.For this reason, the invention provides a kind of welding method of vacuum bottom assembly, please understood according to Fig. 2-3, this welding method comprises the following steps.
Step 100, is set on the outer wall of this vacuum connection tube 1 by a silver brazing circle 3, wherein, this silver brazing circle 3 with this vacuum connection tube 1 for interference fit is connected.
Step 101, is pressed into one end of this vacuum connection tube 1 in the through hole 21 of this vacuum bottom 2, and this silver brazing circle 3 is pressed into the top of this through hole 21.
Step 102, uses this silver brazing circle 3 of a heating devices heat, and makes this heater and this silver brazing circle 3 have a relative rotary motion.Wherein, the heating-up temperature of this heater is 800 degrees Celsius.
In the present embodiment, silver pricker is uniformly distributed on the outer wall of vacuum connection tube 1, make to feed in raw material evenly during welding, avoid the waste of product gas leakage because reinforced inequality causes and solder, improve the sealing property of vacuum chamber 6, save solder, and reduce the skill set requirements to operating personnel, improve the qualification rate of product.
Wherein, in step 100, the shape of this silver brazing circle 3 is annular, and the internal diameter of this silver brazing circle 3 0.1mm larger than the diameter of this vacuum connection tube 1.Make this silver brazing circle 3 can closely be fitted on the outer wall of vacuum connection tube 1 like this, uniformity reinforced during guarantee welding, be convenient to the welding effect improving welding vacuum connection tube 1 and vacuum bottom 2.
In addition, in step 100, the shape of the cross section of this silver brazing circle 3 is circular, and the diameter of this cross section is 1.1mm-1.3mm.In so avoiding because of the reinforced less phenomenon causing commissure to occur crackle, also avoid because of the reinforced more solder waste caused, improve the sealing property of vacuum chamber 6.
Wherein, the diameter of this cross section is preferably 1.2mm.Make the sealing property of vacuum chamber 6 and production cost all suitable like this.
In addition, in a step 102, this heater and this silver brazing circle 3 have a relative rotary motion and specifically comprise the following steps:
Step 1020, fixes this heater.Wherein, in the use procedure of reality, this heater can be welding gun.
Step 1021, makes this silver brazing circle 3, vacuum bottom 2 and vacuum connection tube 1 entirety rotate around the center line of this vacuum connection tube 1.Wherein, can this silver brazing circle 3, vacuum bottom 2 and vacuum connection tube 1 entirety be fixed on a fixture, drive this fixture to rotate by a drive unit, thus drive this silver brazing circle 3, vacuum bottom 2 and vacuum connection tube 1 entirety to rotate around the center line of this vacuum connection tube 1.
In the present embodiment, adopt above-mentioned welding method, ensure that stable speed of welding in welding process, ensure that the uniformity of weld seam, thus improve the welding quality of commissure, and then improve the sealing property of vacuum chamber 6.
Further, in a step 102, the relative rotation angle speed of this relative rotary motion is (pi/2-4 π) rad/s.In so avoiding the problem causing solder sputter to go out because relative rotation angle speed is excessive, also avoid and cause vacuum bottom 2 and vacuum connection tube 1 to occur burn-off phenomenon because relative rotation angle speed is too small.
Please understood according to Fig. 6, this vacuum plant, after having vacuumized, extrudes a vacuum connection tube 1 energetically with two cylinders and cuts off, form form as shown in Figure 6.Wherein, the length of the vacuum connection tube 1 after cutting off is 9mm-11mm.This avoid and make commissure ftracture and leak gas because of the root deformation of vacuum connection tube 1.
Embodiment 2
The welding method of vacuum bottom assembly and the difference of embodiment 1 of the present embodiment are only, in a step 102, this heater and this silver brazing circle 3 have a relative rotary motion and specifically comprise the following steps:
Step 1020 ', entirety fixes this silver brazing circle 3, vacuum bottom 2 and vacuum connection tube 1.
Step 1021 ', this heater is rotated around the center line of this vacuum connection tube 1.Wherein, heater can be welding gun, and this heater can be fixed on a fixture simultaneously, drives this fixture to rotate, thus drive this heater to rotate around the center line of this vacuum connection tube 1 by a drive unit.
In the present embodiment, adopt above-mentioned welding method, ensure that stable speed of welding in welding process, ensure that the uniformity of weld seam, thus improve the welding quality of commissure, and then improve the sealing property of vacuum chamber 6.
In sum, present invention, avoiding the waste of product gas leakage because reinforced inequality causes and solder, improve the sealing property of vacuum chamber, save solder, and reduce the skill set requirements to operating personnel, improve the qualification rate of product.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that this only illustrates, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these embodiments, but these change and amendment all falls into protection scope of the present invention.
Claims (7)
1. the welding method of a vacuum bottom assembly, this vacuum bottom assembly comprises vacuum bottom and vacuum connection tube, the bottom of this vacuum bottom is provided with the through hole be connected with a vacuum chamber, the material of this vacuum bottom is stainless steel, one end of this vacuum connection tube is connected with this vacuum chamber, and the material of this vacuum connection tube is copper, it is characterized in that, this welding method comprises the following steps:
S
1, a silver brazing snare is located on the outer wall of this vacuum connection tube, wherein, this silver brazing circle and this vacuum connection tube are that interference fit is connected;
S
2, one end of this vacuum connection tube is pressed in the through hole of this vacuum bottom, and this silver brazing circle is pressed into the top of this through hole;
S
3, use this silver brazing circle of a heating devices heat, and make this heater and this silver brazing circle have a relative rotary motion.
2. welding method as claimed in claim 1, is characterized in that, in step S
1in, the shape of this silver brazing circle is annular, the internal diameter 0.1mm larger than the diameter of this vacuum connection tube of this silver brazing circle.
3. welding method as claimed in claim 1, is characterized in that, in step S
1in, the shape of the cross section of this silver brazing circle is circular, and the diameter of this cross section is 1.1mm-1.3mm.
4. welding method as claimed in claim 3, it is characterized in that, the diameter of this cross section is 1.2mm.
5. as the welding method in claim 1-4 as described in any one, it is characterized in that, in step S
3in, this heater and this silver brazing circle have a relative rotary motion and specifically comprise the following steps:
S
31, fix this heater;
S
32, the overall center line around this vacuum connection tube of this silver brazing circle, vacuum bottom and vacuum connection tube is rotated.
6. as the welding method in claim 1-4 as described in any one, it is characterized in that, in step S
3in, this heater and this silver brazing circle have a relative rotary motion and specifically comprise the following steps:
S
31', entirety fixes this silver brazing circle, vacuum bottom and vacuum connection tube;
S
32', this heater is rotated around the center line of this vacuum connection tube.
7. as the welding method in claim 1-4 as described in any one, it is characterized in that, in step S
3in, the relative rotation angle speed of this relative rotary motion is (pi/2-4 π) rad/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381279.2A CN104209616B (en) | 2014-08-05 | 2014-08-05 | The welding method of vacuum bottom cover assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381279.2A CN104209616B (en) | 2014-08-05 | 2014-08-05 | The welding method of vacuum bottom cover assembly |
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| Publication Number | Publication Date |
|---|---|
| CN104209616A true CN104209616A (en) | 2014-12-17 |
| CN104209616B CN104209616B (en) | 2019-05-31 |
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|---|---|---|---|
| CN201410381279.2A Active CN104209616B (en) | 2014-08-05 | 2014-08-05 | The welding method of vacuum bottom cover assembly |
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| CN101032773A (en) * | 2007-04-18 | 2007-09-12 | 南京三超金刚石工具有限公司 | Method and device for the braze welding of tool made of superhard material |
| CN101200013A (en) * | 2007-12-03 | 2008-06-18 | 中国核动力研究设计院 | Copper and stainless steel dissimilar metal water adapter vacuum brazing technology method |
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| CN102528193A (en) * | 2011-12-30 | 2012-07-04 | 刘字冬 | Copper and stainless steel brazing process |
| CN102853108A (en) * | 2011-06-29 | 2013-01-02 | 株式会社鹭宫制作所 | Brazing structure body and brazing method of piping components |
| CN102848139A (en) * | 2012-06-08 | 2013-01-02 | 浙江三花制冷集团有限公司 | Connection pipe, production method thereof and gas collection tube assembly |
| CN103203608A (en) * | 2013-03-23 | 2013-07-17 | 广州有色金属研究院 | Method for improving quality of soldered joint of shell-and-tube type heat exchanger |
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2014
- 2014-08-05 CN CN201410381279.2A patent/CN104209616B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629597A (en) * | 2004-07-15 | 2005-06-22 | 浙江银轮机械股份有限公司 | Connection method for tube plate and pipe joint of tube-shell/tube-sheet type heat exchanger |
| CN101032773A (en) * | 2007-04-18 | 2007-09-12 | 南京三超金刚石工具有限公司 | Method and device for the braze welding of tool made of superhard material |
| CN101200013A (en) * | 2007-12-03 | 2008-06-18 | 中国核动力研究设计院 | Copper and stainless steel dissimilar metal water adapter vacuum brazing technology method |
| CN102179587A (en) * | 2011-04-27 | 2011-09-14 | 西安远航真空钎焊技术有限公司 | Brazing alloy prefilling process in vacuum brazing |
| CN102853108A (en) * | 2011-06-29 | 2013-01-02 | 株式会社鹭宫制作所 | Brazing structure body and brazing method of piping components |
| CN102528193A (en) * | 2011-12-30 | 2012-07-04 | 刘字冬 | Copper and stainless steel brazing process |
| CN102848139A (en) * | 2012-06-08 | 2013-01-02 | 浙江三花制冷集团有限公司 | Connection pipe, production method thereof and gas collection tube assembly |
| CN103203608A (en) * | 2013-03-23 | 2013-07-17 | 广州有色金属研究院 | Method for improving quality of soldered joint of shell-and-tube type heat exchanger |
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| CN104209616B (en) | 2019-05-31 |
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Denomination of invention: Welding method for vacuum bottom cover assembly Effective date of registration: 20230407 Granted publication date: 20190531 Pledgee: Bank of China Limited by Share Ltd. Shanghai Development Zone Pudong branch Pledgor: SHANGHAI SOLID STAINLESS STEEL PRODUCTS Co.,Ltd. Registration number: Y2023310000113 |
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