CN104209616B - The welding method of vacuum bottom cover assembly - Google Patents
The welding method of vacuum bottom cover assembly Download PDFInfo
- Publication number
- CN104209616B CN104209616B CN201410381279.2A CN201410381279A CN104209616B CN 104209616 B CN104209616 B CN 104209616B CN 201410381279 A CN201410381279 A CN 201410381279A CN 104209616 B CN104209616 B CN 104209616B
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- China
- Prior art keywords
- vacuum
- connection tube
- bottom cover
- silver brazing
- circle
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a kind of welding methods of vacuum bottom cover assembly, which includes vacuum bottom cover and vacuum connection tube, and the welding method is the following steps are included: S1, a silver brazing snare is located on the outer wall of the vacuum connection tube, wherein the silver brazing circle and the vacuum connection tube are interference fit connection；S2, one end of the vacuum connection tube is pressed into the through-hole of the vacuum bottom cover, and the silver brazing circle is pressed into the top of the through-hole；S3, using the heating devices heat silver brazing circle, and make the heating device and the silver brazing circle that there is a relative rotary motion.The invention avoids because charging it is uneven caused by product gas leakage and the waste of solder, improve the sealing performance of vacuum chamber, save solder, and reduce the skill requirement to operator, improve the qualification rate of product.
Description
Technical field
The present invention relates to a kind of welding methods of vacuum bottom cover assembly.
Background technique
As shown in Figure 1, vacuum bottom cover assembly includes vacuum bottom cover 2 ' and vacuum connection tube 1 ', the bottom of the vacuum bottom cover 2 '
Equipped with the through-hole 21 ' being connected with a vacuum chamber, the material of the vacuum bottom cover 2 ' is stainless steel, one end of the vacuum connection tube 1 '
It is connected with the vacuum chamber, and the material of the vacuum connection tube 1 ' is copper.Currently, the welding method of traditional vacuum bottom cover assembly
The following steps are included: firstly, vacuum connection tube 1 ' is pressed into the through-hole 21 ' of vacuum bottom cover 2 '；Then, by a silver brazing item 3 '
It is placed in the through hole；Finally, locating to heat apart from the silver brazing item 3 ' in through-hole using a heating device.But traditional vacuum bottom
There are following technical problems for the welding method of cap assembly:
(1) easily feed unevenness when welding, and at the less position that feeds, intensity is lower and easy to crack, thus make product gas leakage,
It feeds at more position, causes great waste；
(2) in manual welding process, heating devices heat is used on the other hand, and the other hand adds silver brazing item, wholeheartedly two uses, easily goes out
It now makes mistakes, Qualified Products Rate is lower.
Summary of the invention
The technical problem to be solved by the present invention is to the welding sides in order to overcome vacuum bottom cover assembly traditional in the prior art
Qualified Products Rate is lower in method, the easy gas leakage of product, easily causes the defects of waste of solder, provides a kind of vacuum bottom cover assembly
Welding method.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of welding method of vacuum bottom cover assembly, the vacuum bottom cover assembly include vacuum bottom cover and vacuum connection tube, are somebody's turn to do
The bottom of vacuum bottom cover is equipped with the through-hole being connected with a vacuum chamber, and the material of the vacuum bottom cover is stainless steel, the bonding in vacuum
One end of pipe is connected with the vacuum chamber, and the material of the vacuum connection tube be copper, it is characterized in that, the welding method include with
Lower step:
S1, a silver brazing snare is located on the outer wall of the vacuum connection tube, wherein the silver brazing circle and the bonding in vacuum
Pipe is interference fit connection；
S2, one end of the vacuum connection tube is pressed into the through-hole of the vacuum bottom cover, and the silver brazing circle is pressed into this and is led to
The top in hole；
S3, using the heating devices heat silver brazing circle, and it is one opposite to have the heating device and the silver brazing circle
Rotary motion.
In the present solution, so that charging is uniform when welding, being avoided on the outer wall that silver-colored pricker is uniformly distributed in vacuum connection tube
Because charging it is uneven caused by product gas leakage and the waste of solder, improve the sealing performance of vacuum chamber, save solder, and drop
The low skill requirement to operator, improves the qualification rate of product.
Preferably, in step S1In, the shape of the silver brazing circle is annular, and the internal diameter of the silver brazing circle is than the bonding in vacuum
The big 0.1mm of the diameter of pipe.
In the present solution, enabling the silver brazing circle to be closely adhered to vacuum connection tube using above-mentioned welding method
Outer wall on, guarantee the uniformity that feeds when welding, convenient for improving the welding effect of welding vacuum connection tube and vacuum bottom cover.
Preferably, in step S1In, the shape of the cross section of the silver brazing circle is circle, and the diameter of the cross section is
1.1mm-1.3mm。
In the present solution, using above-mentioned welding method, not only avoid because feed it is less caused by commissure it is cracked
Phenomenon, it is thus also avoided that because feed it is more caused by solder waste, improve the sealing performance of vacuum chamber.
Preferably, the diameter of the cross section is 1.2mm.
When in the present solution, the diameter of cross section is 1.2mm, the sealing performance and production cost of vacuum chamber are suitable.
Preferably, in step S3In, the heating device and the silver brazing circle there is a relative rotary motion to specifically include with
Lower step:
S31, fix the heating device；
S32, rotate the whole center line around the vacuum connection tube of the silver brazing circle, vacuum bottom cover and vacuum connection tube.
In the present solution, ensure that stable speed of welding in the welding process using above-mentioned welding method, ensure that weldering
The uniformity of seam to improve the welding quality of commissure, and then improves the sealing performance of vacuum chamber.
Preferably, in step S3In, the heating device and the silver brazing circle there is a relative rotary motion to specifically include with
Lower step:
S31', the whole silver brazing circle, vacuum bottom cover and the vacuum connection tube fixed；
S32', make the heating device around the vacuum connection tube center line rotate.
In the present solution, ensure that stable speed of welding in the welding process using above-mentioned welding method, ensure that weldering
The uniformity of seam to improve the welding quality of commissure, and then improves the sealing performance of vacuum chamber.
Preferably, in step S3In, the relative rotation angular speed of the relative rotary motion is (- 4 π of pi/2) rad/s.
In the present solution, relative rotary motion relative rotation angular speed be (- 4 π of pi/2) rad/s, not only avoid because of phase
To angular velocity of rotation excessive the problem of causing solder sputter to go out, it is thus also avoided that because relative rotation angular speed it is too small caused by vacuum bottom
There is burn-off phenomenon in lid and vacuum connection tube.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
The invention avoids because charging it is uneven caused by product gas leakage and the waste of solder, improve the sealing of vacuum chamber
Performance saves solder, and reduces the skill requirement to operator, improves the qualification rate of product.
Detailed description of the invention
Fig. 1 is the use state diagram of the welding method of existing vacuum bottom cover assembly.
Fig. 2 is the use state diagram of the welding method of the vacuum bottom cover assembly of present pre-ferred embodiments.
Fig. 3 is main view corresponding with Fig. 2.
Fig. 4 is the use state diagram of vacuum bottom cover assembly.
Fig. 5 is main view corresponding with Fig. 4.
Fig. 6 is the structural schematic diagram for cutting the vacuum bottom cover assembly after vacuum connection tube.
Description of symbols:
The prior art
Vacuum connection tube: 1 '
Vacuum bottom cover: 2 ' through-holes: 21 '
Silver brazing item: 3 '
The present invention
Vacuum connection tube: 1
Vacuum bottom cover: 2 through-holes: 21
Silver brazing circle: 3
Outer housing: step part on 4: 41 downstairs shape portions: 42
Liner: 5
Vacuum chamber: 6
Specific embodiment
A preferred embodiment is named, and completely illustrates the present invention in conjunction with attached drawing to become apparent from.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is orientation based on the figure or position
Relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
There is specific orientation, be constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
Embodiment 1
As illustrated in figures 4-5, vacuum plant includes a vacuum bottom cover assembly, an outer housing 4 and a liner 5, the top of outer housing 4
Portion is equipped with upper step part 41, and bottom is equipped with downstairs shape portion 42.Wherein, the outer wall of the bottom of liner 5 and downstairs shape portion 42
Inner wall connected by welded seal, and around being formed with a vacuum chamber 6 between liner 5 and outer housing 4.
In addition, the vacuum bottom cover assembly includes vacuum bottom cover 2 and vacuum connection tube 1, the outer wall of vacuum bottom cover 2 and upper ladder
The inner wall in shape portion 41 is connected by welded seal, and the bottom of vacuum bottom cover 2 is equipped with the through-hole 21 being connected with vacuum chamber 6, and true
One end of empty connecting tube 1 is connected with the vacuum chamber 6, and the other end is connected with evacuator.Wherein, the material of vacuum bottom cover 2
For stainless steel, the material of vacuum connection tube 1 is copper.
In the actual use process, in order to improve the sealing performance of the vacuum plant, need to guarantee vacuum connection tube 1 with
Welded seal effect between vacuum bottom cover 2.For this purpose, asking root the present invention provides a kind of welding method of vacuum bottom cover assembly
Understood according to Fig. 2-3, which includes the following steps.
Step 100, a silver brazing circle 3 is set on the outer wall of the vacuum connection tube 1, wherein the silver brazing circle 3 with should
Vacuum connection tube 1 is interference fit connection.
Step 101, one end of the vacuum connection tube 1 is pressed into the through-hole 21 of the vacuum bottom cover 2, and by the silver brazing circle
3 are pressed into the top of the through-hole 21.
Step 102, using the heating devices heat silver brazing circle 3, and there is the heating device with the silver brazing circle 3
One relative rotary motion.Wherein, the heating temperature of the heating device is 800 degrees Celsius.
In the present embodiment, silver-colored pricker is uniformly distributed on the outer wall of vacuum connection tube 1, so that charging uniformly, is kept away when welding
Product gas leakage and the waste of solder caused by having exempted from because of charging unevenness, improve the sealing performance of vacuum chamber 6, save weldering
Material, and the skill requirement to operator is reduced, improve the qualification rate of product.
Wherein, in step 100, the shape of the silver brazing circle 3 is annular, and the internal diameter of the silver brazing circle 3 is than the vacuum
The big 0.1mm of the diameter of connecting tube 1.The silver brazing circle 3 is enabled to be closely adhered on the outer wall of vacuum connection tube 1 in this way,
Guarantee the uniformity to feed when welding, convenient for improving the welding effect of welding vacuum connection tube 1 and vacuum bottom cover 2.
In addition, in step 100, the shape of the cross section of the silver brazing circle 3 is circle, and the diameter of the cross section is
1.1mm-1.3mm.In so avoiding because feed it is less caused by the cracked phenomenon in commissure, it is thus also avoided that because charging compared with
Solder caused by more wastes, and improves the sealing performance of vacuum chamber 6.
Wherein, the diameter of the cross section is preferably 1.2mm.Make sealing performance and the production cost of vacuum chamber 6 equal in this way
Properly.
In addition, in a step 102, the heating device and the silver brazing circle 3 there is a relative rotary motion to specifically include with
Lower step:
Step 1020, the heating device is fixed.Wherein, in the actual use process, which can be welding gun.
Step 1021, make the silver brazing circle 3, vacuum bottom cover 2 and vacuum connection tube 1 whole in the vacuum connection tube 1
The rotation of heart line.Wherein it is possible to which the silver brazing circle 3, vacuum bottom cover 2 and vacuum connection tube 1 are integrally attached on a fixture, pass through
One driving device drives the fixture to rotate, to drive the silver brazing circle 3, vacuum bottom cover 2 and vacuum connection tube 1 whole true around this
The center line of empty connecting tube 1 rotates.
In the present embodiment, using above-mentioned welding method, it ensure that stable speed of welding in the welding process, ensure that
The uniformity of weld seam to improve the welding quality of commissure, and then improves the sealing performance of vacuum chamber 6.
Further, in a step 102, the relative rotation angular speed of the relative rotary motion is (- 4 π of pi/2) rad/s.This
Sample not only avoid because relative rotation angular speed it is excessive caused by solder sputter go out the problem of, it is thus also avoided that because relative rotation angle speed
It spends and small vacuum bottom cover 2 and vacuum connection tube 1 is caused burn-off phenomenon occur.
Please understood according to Fig. 6, which is squeezed energetically with two cylinders and vacuum is connected after the completion of vacuumizing
Adapter tube 1 is cut, and form as shown in Figure 6 is formed.Wherein, the length of the vacuum connection tube 1 after cutting is 9mm-11mm.It thus is avoided that
Commissure is made because of the root deformation of vacuum connection tube 1 to crack and gas leakage.
Embodiment 2
The welding method of vacuum bottom cover assembly of the present embodiment and the difference is that only for embodiment 1, in step 102
In, the heating device and the silver brazing circle 3 there is a relative rotary motion specifically includes the following steps:
Step 1020 ', integrally fix the silver brazing circle 3, vacuum bottom cover 2 and vacuum connection tube 1.
Step 1021 ', rotate the heating device around the center line of the vacuum connection tube 1.Wherein, heating device can be
Welding gun, and can be fixed on the heating device on one fixture simultaneously, drive the fixture to rotate by a driving device, thus band
The center line that the heating device is moved around the vacuum connection tube 1 rotates.
In the present embodiment, using above-mentioned welding method, it ensure that stable speed of welding in the welding process, ensure that
The uniformity of weld seam to improve the welding quality of commissure, and then improves the sealing performance of vacuum chamber 6.
In conclusion the invention avoids because charging it is uneven caused by product gas leakage and the waste of solder, improve true
The sealing performance of cavity saves solder, and reduces the skill requirement to operator, improves the qualification rate of product.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (2)
1. a kind of welding method of vacuum bottom cover assembly, which includes vacuum bottom cover and vacuum connection tube, this is true
The bottom of empty bottom cover is equipped with the through-hole being connected with a vacuum chamber, and the material of the vacuum bottom cover is stainless steel, the vacuum connection tube
One end be connected with the vacuum chamber, and the material of the vacuum connection tube be copper, which is characterized in that the welding method includes following
Step:
S1, a silver brazing snare is located on the outer wall of the vacuum connection tube, wherein the silver brazing circle is with the vacuum connection tube
Interference fit connection；In step S1In, the shape of the cross section of the silver brazing circle is circle, and the diameter of the cross section is
1.1mm-1.3mm；
S2, one end of the vacuum connection tube is pressed into the through-hole of the vacuum bottom cover, and the silver brazing circle is pressed into the top of the through-hole
Portion；
S3, using the heating devices heat silver brazing circle, and make the heating device and the silver brazing circle that there is relative rotation fortune
It is dynamic；In step S3In, the relative rotation angular speed of the relative rotary motion is (- 4 π of pi/2) rad/s；
In step S3In, the heating device and the silver brazing circle there is a relative rotary motion specifically includes the following steps:
S31', the whole silver brazing circle, vacuum bottom cover and the vacuum connection tube fixed；
S32', the heating device be welding gun, which is fixed on a fixture, which is driven by a driving device
Tool rotation, so that the heating device be driven to rotate around the center line of the vacuum connection tube；
S4, the vacuum connection tube weld together with the vacuum bottom cover, the vacuum chamber is taken out from the vacuum connection tube true
Sky is squeezed energetically with two cylinders and the vacuum connection tube is cut after the completion of vacuumizing, the bonding in vacuum after cutting
The length of pipe is 9mm-11mm.
2. welding method as described in claim 1, which is characterized in that the diameter of the cross section is 1.2mm.
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 |
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| CN104209616A CN104209616A (en) | 2014-12-17 |
| CN104209616B true 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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| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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- 2014-08-05 CN CN201410381279.2A patent/CN104209616B/en active Active
Patent Citations (7)
| 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 |
| 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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| CN104209616A (en) | 2014-12-17 |
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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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