CN110369843A - A kind of method of canning tube electric resistance welding Vacuum Package - Google Patents
A kind of method of canning tube electric resistance welding Vacuum Package Download PDFInfo
- Publication number
- CN110369843A CN110369843A CN201910710027.2A CN201910710027A CN110369843A CN 110369843 A CN110369843 A CN 110369843A CN 201910710027 A CN201910710027 A CN 201910710027A CN 110369843 A CN110369843 A CN 110369843A
- Authority
- CN
- China
- Prior art keywords
- metal capsule
- capsule pipe
- electric resistance
- canning tube
- resistance welding
- Prior art date
- 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.)
- Pending
Links
- 238000009924 canning Methods 0.000 title claims abstract description 60
- 238000003466 welding Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 35
- 239000002775 capsule Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 13
- 238000005476 soldering Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 239000010453 quartz Substances 0.000 description 5
- 239000003708 ampul Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 3
- 238000001513 hot isostatic pressing Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000009849 vacuum degassing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004826 seaming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/0006—Resistance welding; Severing by resistance heating the welding zone being shielded against the influence of the surrounding atmosphere
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/02—Pressure butt welding
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention provides a kind of methods of canning tube electric resistance welding Vacuum Package, sample are placed in metal capsule pipe closed at one end；After setting vacuum degree will be evacuated to inside metal capsule pipe by the open end of metal capsule pipe；Metal capsule pipe is placed between two electrodes, electric current is passed to two electrodes, after the region between two electrodes is heated to set temperature, is pressurizeed using hydraulic flat tongs to heating region, heating zone is set to form closed welding point, so that sample is sealed in metal capsule pipe.Vacuum effectiveness good of the present invention, high production efficiency, soldering and sealing efficiency and success rate are high, and structure is simple, lower production costs.
Description
Technical field
The present invention relates to a kind of experimental methods of canning tube vacuum seal, are suitable in no vacuum heat treatment furnace, or
(such as hot isostatic pressing prefabricated component) carries out heat treatment experiment or material system in the case where needing raw material to keep vacuum in preparation process
It is standby, belong to material heat treatment and field of material preparation.
Background technique
Canning tube vacuum encapsulation process multiselect currently used for heat treatment uses high quartz glass as canning tube, vacuumizes
Quartz ampoule is heated using oxyhydrogen flame rifle afterwards, softens quartz ampoule and shrinks closure under atmospheric pressure, complete vacuum
It encapsulates, needs strict control heating time in encapsulation process, quartz ampoule softening part is easy to appear hole, and air moment pours in very
Empty set system, it will vacuum pump is caused seriously to damage；Since quartz ampoule is more crisp, raw material are if Choice of Quartz Tube Diameters is as jacket body
It can not hip moulding.
Canning tube soldering and sealing for hot isostatic pressing preparation technique mainly carries out in vacuum degassing furnace, and canning tube is placed in very
Sky removes in steam stove, after vacuum degassing furnace reaches higher vacuum, using vacuum electron beam welding or other welding techniques pair
Jacket is sealed, and the technology production efficiency is low, at high cost；Further, since canning tube carries out soldering and sealing, thus nothing in a vacuum furnace
Method detect soldering and sealing complete when canning tube whether gas leakage.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of method of canning tube electric resistance welding Vacuum Package, can
Vacuum heat treatment experiment is carried out using normative heat treatment furnace；The present invention can be also used for the technique that hot isostatic pressing prepares new material,
Raw material are carried out vacuumizing post package in metal capsule to prepare as precast body for subsequent heat and other static pressuring processes.
The technical solution adopted by the present invention to solve the technical problems is the following steps are included: sample is placed in closed at one end
In metal capsule pipe；After setting vacuum degree will be evacuated to inside metal capsule pipe by the open end of metal capsule pipe；It will be golden
Belong to canning tube to be placed between two electrodes, electric current is passed to two electrodes, after the region between two electrodes is heated to set temperature, utilizes
Hydraulic flat tongs pressurize to heating region, so that heating zone is formed closed welding point, so that sample is sealed in metal capsule
Guan Zhong.
Described metal capsule pipe one end is carried out closed by arc welding.
The metal capsule pipe is vacuumized using the two-stage (two-speed) pump that mechanical pump and molecular pump are constituted, and is measured using vacuum meter
Vacuum degree.
The outer diameter of the metal capsule pipe is equal to the internal diameter of two-stage (two-speed) pump exhaust tube, and is sealed using rubber seal.
The stainless steel tube of the 30~50cm of metal capsule Guan Weichang, the distance between two electrodes are 10~12cm,
It is 10~15cm at a distance from exhaust tube interface apart from the closer electrode in metal capsule tube opening end.
The vacuum degree that sets is air pressure less than 6.0 × 10-4Pa。
The electrode uses copper clip, and clip is clamped in metal capsule pipe outer wall, and clip and metal capsule pipe
Between have annular copper gasket.
When the hydraulic flat tongs pressurize to heating region, flat-nose pliers is pressurizeed with the speed less than 0.5mm/s, and pressure is
20~40MPa.
The beneficial effects of the present invention are:
Since the present invention is combined using mechanical pump, molecular pump two-stage, and canning tube structure is simple, and vacuum degree can reach 6.0
×10-4Pa or more, vacuum effectiveness good meet vacuum heat treatment requirement.In addition, canning tube cavity volume is small, vacuum degree is from normal pressure
It is short to the time required for high vacuum, high production efficiency.
The present invention uses metal capsule pipe, and plasticity and toughness are good, is not in hole or crack conditions during soldering and sealing, will not
Vacuum system is damaged, soldering and sealing efficiency and success rate are high.
Whether the present invention can reach target by the vacuum degree in the vacuum meter real-time monitoring canning tube in vacuum system
Value, by the registration of vacuum meter can determine canning tube whether gas leakage and whether soldering and sealing success, for production active belt greatly just
Benefit.
The configuration of the present invention is simple does not need the equipment such as vacuum degassing furnace, vacuum heat treatment furnace, lower production costs.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the specific embodiment of the invention；
Fig. 2 is the structural schematic diagram of copper clip 3；
In figure, 1- flat mouth hydraulic tongs seaming chuck, 2- canning tube is heated region, 3- copper clip, and 4- canning tube places sample
Product region, 5- sample, 6- sealed end, 7- flat mouth hydraulic tongs push-down head, 8- canning tube and exhaust tube junction, 9- exhaust tube, 10-
Canning tube transitional region, 11- clip, 12- annular copper backing.
Specific embodiment
The thinking that canning tube vacuum encapsulation process method of the invention is isolated essentially according to physical vacuum, utilizes metal capsule
Pipe is as the container of sample or as the carrier vacuumized with electric resistance welding.Expection is evacuated to the metal capsule pipe equipped with sample
After vacuum degree, canning tube is placed between two electrodes, passes to electric current, the region that electric current passes through can generate resistance heat, when the region
After being heated to certain temperature, certain pressure is applied to heating region using hydraulic flat tongs and keeps certain time, makes heating zone
Closed welding point is formed, so that sample is sealed in metal capsule pipe.Then packaged sample is placed in conventional heat
It carries out heat treatment experiment in treatment furnace or is placed in hot isostatic apparatus to prepare material.
The experimental provision (as shown in Figure 1) that the present invention is encapsulated about metal capsule pipe degasification electric resistance welding is mainly by semiclosed packet
Casing, vacuum system, direct current electric heating system and four part of hydraulic system composition:
Wherein canning tube is stainless steel tube (or other metal tubes), and canning tube one end is carried out close by common arc welding
It closes；In order to guarantee the close connection with vacuum system, jacket pipe outside diameter is necessarily equal to the internal diameter (diameter 10mm) of exhaust tube, and
It is sealed using rubber seal.The vacuum system is made of mechanical pump, molecular pump two-stage (two-speed) pump and vacuum meter, can make jacket
Pipe reaches higher vacuum degree, and can real-time detection.The direct current electric heating system is pressed from both sides by D.C. regulated power supply, power supply line, copper
Son, copper backing composition, using low-voltage (16V) high current (0~350A), due to heating canning tube during electric current it is larger,
It is necessary to ensure that canning tube contacts well with power supply line, it can be very well using annular copper backing (internal diameter of annular copper backing 12 is 10mm)
Ground meets this requirement.The hydraulic system is made of hydraulic station, hydraulic station control cabinet, flat mouth hydraulic tongs, is controlled by adjusting
Output intent option on cabinet depresses the pressure head of flat mouth hydraulic tongs slowly, and canning tube is avoided to occur since deformation velocity is too fast
The phenomenon that cracking.
Operating procedure of the invention is as follows:
1) taking a segment length is the canning tube of 30~50cm, wherein will be sealed with common arc welding and ensure not leak in one end
Sample is packed into canning tube by gas, and position is as close as possible to that one end blocked；
2) exhaust tube of one end and vacuum system for not sealing canning tube connects, it is ensured that interface is tightly combined.
3) 6.0 × 10 are evacuated to canning tube using the vacuum system that mechanical pump and molecular pump form-4Pa or more.
4) positive and negative anodes of D.C. regulated power supply output end are connect with two copper clips respectively with conducting wire, it is ensured that electric conductivity is good
It is good；Copper clip is clipped on canning tube, gasket ring shape copper backing between clip and canning tube, the distance between two clips be 10~
12cm is 10~15cm at a distance from exhaust tube interface apart from the closer clip in canning tube open end, avoids in heating process
The canning tube temperature of interface is excessively high, influences air-tightness；After turn-on current, the canning tube between two clips is partially due to electricity
Hinder it is larger, by Joule's law Q=I2A large amount of heat can be generated at this known to Rt, electric current (10~20A/s) is gradually increased, makes jacket
Tube temperature degree gradually rises to 1000~1100 DEG C.
5) after canning tube, which is heated portion of temperature, reaches 1000~1100 DEG C, using flat mouth hydraulic tongs to being heated
Region carries out pincers pressure, and 2~3min of pressure maintaining, combines compressed portion sufficiently.
6) D.C. regulated power supply, vacuum system are closed after the completion of soldering and sealing, removes canning tube, complete soldering and sealing operation.
Present invention will be further explained below with reference to the attached drawings and examples, and the present invention includes but are not limited to following implementations
Example.The present embodiment uses device as shown in Figure 1, comprising the following steps:
1, a segment length is taken to be greater than the stainless steel canning tube (or other metal material canning tubes) that 30cm outer diameter is 10mm, benefit
Canning tube one end is sealed with conventional arc welding technology, as sealed end 6, and guarantees that air-tightness is good, sample 5 is packed into jacket
Pipe, position is as close as possible to sealed end 6.
2, the exhaust tube 9 (internal diameter 10mm) of one end and vacuum system for not blocking canning tube connects, with sealing ring,
The parts such as nut are fixed, it is ensured that interface is tightly combined, will not gas leakage.
3, vacuum degree in canning tube is first extracted into 1Pa or so using mechanical pump, then uses molecular pump, mechanical pump two simultaneously
Grade pump is evacuated to 6.0 × 10-4Pa or more to canning tube.
4, the positive and negative anodes of D.C. regulated power supply output end are connect with two clips 11 respectively using conducting wire, it is ensured that junction
Electric conductivity is good；Clip is clipped on canning tube, gasket ring shape copper billet 12 between clip and canning tube, improvement electric conductivity, two
The distance between clip 3 is 10~12cm, and 10 length of transitional region between clip and pumping interface tube is 10~15cm, is opened
D.C. regulated power supply switch adjusts output electric current with the speed of 40~50A/s and increases to 250A by 0A, keeps 2~2.5min extremely
Canning tube temperature is increased to 500~600 DEG C；Then electric current is increased to 300A with the speed of 20~30A/S, keeps 1min；Continue
Electric current is adjusted to 350A, keeps 1min.
5, hydraulic station power supply is opened, respectively puts one layer of insulation board between push-down head and canning tube on flat mouth hydraulic tongs, is adjusted
Hydraulic tongs pressure head decrease speed is 1~2mm/s, presses push-down head on hydraulic tongs by canning tube with slowly (being less than 0.5mm/s),
Adjusting DC current regulator power supply output electric current is 330A, keeps pressure 3min, and combining compressed portion sufficiently, (this technique is applicable in
In stainless steel canning tube, if the canning tube of selection other materials, needs to adjust the parameters such as electric current, time).
6, D.C. regulated power supply, vacuum system are closed after the completion of soldering and sealing, lifts flat mouth hydraulic tongs seaming chuck 1, removes packet
Casing completes soldering and sealing operation.
Claims (8)
1. a kind of method of canning tube electric resistance welding Vacuum Package, it is characterised in that include the following steps: for sample to be placed in an end seal
In the metal capsule pipe closed；After setting vacuum degree will be evacuated to inside metal capsule pipe by the open end of metal capsule pipe；
Metal capsule pipe is placed between two electrodes, electric current is passed to two electrodes, after the region between two electrodes is heated to set temperature,
It is pressurizeed using hydraulic flat tongs to heating region, so that heating zone is formed closed welding point, so that sample is sealed in metal
In canning tube.
2. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the metal capsule
Pipe one end is carried out closed by arc welding.
3. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the metal capsule
Pipe is vacuumized using the two-stage (two-speed) pump that mechanical pump and molecular pump are constituted, and uses vacuum meter measurement of vacuum.
4. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the metal capsule pipe
Outer diameter be equal to the internal diameter of two-stage (two-speed) pump exhaust tube, and be sealed using rubber seal.
5. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the metal capsule
The stainless steel tube of 30~50cm of Guan Weichang, the distance between two electrodes be 10~12cm, apart from metal capsule tube opening end compared with
Close electrode is 10~15cm at a distance from exhaust tube interface.
6. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the setting vacuum
Degree is air pressure less than 6.0 × 10-4Pa。
7. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the electrode uses
Copper clip, clip are clamped in metal capsule pipe outer wall, and have annular copper gasket between clip and metal capsule pipe.
8. the method for canning tube electric resistance welding Vacuum Package according to claim 1, it is characterised in that: the hydraulic flat mouth
When pincers pressurize to heating region, flat-nose pliers is pressurizeed with the speed less than 0.5mm/s, and pressure is 20~40MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910710027.2A CN110369843A (en) | 2019-08-02 | 2019-08-02 | A kind of method of canning tube electric resistance welding Vacuum Package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910710027.2A CN110369843A (en) | 2019-08-02 | 2019-08-02 | A kind of method of canning tube electric resistance welding Vacuum Package |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110369843A true CN110369843A (en) | 2019-10-25 |
Family
ID=68257660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910710027.2A Pending CN110369843A (en) | 2019-08-02 | 2019-08-02 | A kind of method of canning tube electric resistance welding Vacuum Package |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110369843A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147438A (en) * | 1996-09-12 | 1997-04-16 | 西北有色金属研究院 | Vacuum welding method for composite metal jacket |
| CN101382215A (en) * | 2007-09-05 | 2009-03-11 | 左铁军 | Copper and aluminium connecting tubes with hard sleeve and method for making same |
| US9227267B1 (en) * | 2014-08-13 | 2016-01-05 | William Engineering Llc | Warm bond method for butt joining metal parts |
| CN105880816A (en) * | 2016-06-16 | 2016-08-24 | 西北工业大学 | Sleeved pipe resistance welding vacuum packaging method |
| CN108509750A (en) * | 2018-04-19 | 2018-09-07 | 西北工业大学 | A kind of design method of annular structural part diffusion jockey |
-
2019
- 2019-08-02 CN CN201910710027.2A patent/CN110369843A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147438A (en) * | 1996-09-12 | 1997-04-16 | 西北有色金属研究院 | Vacuum welding method for composite metal jacket |
| CN101382215A (en) * | 2007-09-05 | 2009-03-11 | 左铁军 | Copper and aluminium connecting tubes with hard sleeve and method for making same |
| US9227267B1 (en) * | 2014-08-13 | 2016-01-05 | William Engineering Llc | Warm bond method for butt joining metal parts |
| CN105880816A (en) * | 2016-06-16 | 2016-08-24 | 西北工业大学 | Sleeved pipe resistance welding vacuum packaging method |
| CN108509750A (en) * | 2018-04-19 | 2018-09-07 | 西北工业大学 | A kind of design method of annular structural part diffusion jockey |
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|---|---|---|---|
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191025 |
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| WD01 | Invention patent application deemed withdrawn after publication |