CN1045242A - Self smelting electric arc welding method for matrix of metallic capillary tubes - Google Patents
Self smelting electric arc welding method for matrix of metallic capillary tubes Download PDFInfo
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- CN1045242A CN1045242A CN 90101804 CN90101804A CN1045242A CN 1045242 A CN1045242 A CN 1045242A CN 90101804 CN90101804 CN 90101804 CN 90101804 A CN90101804 A CN 90101804A CN 1045242 A CN1045242 A CN 1045242A
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- capillary
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Abstract
The present invention relates to welding method, relate in particular to the arc-welding method between capillary and its connecting elements, it is to utilize to be subjected to a certain degree freezing argon gas and to pass through from an end capillaceous, outwards spray from its other end, to reach cooling capillary when welding, capillary end is melted rapidly, adopt non consumable arc welding electrode rotation argon arc welding machine, with electric arc make hardware parent heating and melting that respective end capillaceous is progressively melted and and the hardware parent be melt into one, in addition, in welding process, also need clean the welding position of each soldering part in advance.
Description
The present invention relates to welding method, relate in particular to the self smelting electric arc welding method for matrix that is connected between metal capillary and its connecting elements.
In instrument and meter, particularly in comprising the pressure detecting instrument of pressure sensor etc., extensively adopt the transferring elements of capillary component, thereby produce the problem of the welding aspect between metal capillary and its connecting elements as pressure signal.Carry out the welding of this respect with usual employing soldering welding method.Yet so-called soldering is to make a kind of solder fusing lower than base metal material melting point, and both are bonded together and make connected piece, and parent itself does not melt, thereby its bonding strength is not high, and it only can be used for the occasion very not high to the bonding strength requirement usually.In addition, because various nickel-chromium steels contact the stress corrosion problem that all easily produces with the fusing solder, be the crystal boundary infiltration mother metal of braze metal along stress point, the intensity of mother metal and plasticity are descended and easily produce grain growth danger, cause occurring crackle (above " soldering " book that can publish in September, 1979 referring to China Machine Press).
Again because of the welding of the metal capillary said here, the normally welding between material thickness great disparity part, it does not fit into general arc-welding method, otherwise will cause technologic trouble, for example, the phenomenon of common existence is that capillary easily stops up in welding process or can not guarantee sealing being welded to connect the place.Because the problem that exists on these technologies, especially the manufacturing at the pressure sensor of high-temperature high-pressure medium occasion is made troubles.
Therefore, the present invention is exactly in order to address these problems or propose in order to adapt to this needs a kind of self smelting electric arc welding method for matrix of welding between metal capillary and its connecting elements of being widely used in, in order to substitute the soldering welding method of traditional metal capillary in some occasion, in order to overcome above-mentioned technology trouble and high welding quality.
This welding method comprises following step preface:
Step preface 1 forms capillary by the hole on metal structure body, the diameter of this through hole makes capillary and hardware form tight the contact, with the through hole on chemical cleaning capillary and the metal structure body,
Step preface 2 makes an end capillaceous pass described metal structure body, and makes capillary exceed this slightly more than the metal structure body corresponding end-faces, and described welding will be carried out at this place,
Step preface 3 constantly feeds from an end capillaceous of need welding with the argon gas that is lower than environment temperature being slightly larger than environmental pressure, and from other end discharging capillaceous.
Step preface 4 adopts non consumable arc welding electrode rotation argon arc welding machine, from slightly away from striking on the metal structure body of welding position capillaceous, then electric arc is moved near capillary, and electric arc is exceeded on the metal structure body end face slightly, around capillary heating of metal structure body, make the melting state that reaches
Step preface 5 is right after step preface 4, when capillary exceeds the progressively melting of part of metal structure body, and when merging into an organic whole with metal structure body, cuts off and extinguish arcs.
Described welding method main feature is to allow and is subjected to a certain degree freezing argon gas and passes through from the end capillaceous that needs weld, and outwards spray from its other end, in order to when welding begins, to cool off capillary on one side, the capillary pipe end is melted rapidly, rotate argon arc welding machine with non consumable arc welding electrode, make the heating of metal structure body parent reach molten condition with electric arc, thereby make respective end capillaceous part progressively fusing and and metal structure body parent be melt into one, the result firmly is welded on the base metal member capillary, in addition, in welding process, also need clean the welding position of each soldering part in advance.
By the following examples and with reference to accompanying drawing the inventive method is described further.
Fig. 1 schematically illustrates and is connected the figure that the welding between the structure body describes with metal to adopting parent of the present invention to carry out metal capillary from molten arc welding method.
Referring now to accompanying drawing 1,4 is metal capillary, and 1 is metal structure body or the detection seat that is connected with capillary 4, and the parts that couple together like this can be used for diaphragm pressure sensor.Find out thus between connected part that especially at their connecting portion, its thickness differs greatly usually.
Its welding is carried out substantially according to the following steps.
Step preface 1 forms many capillaries by the hole detecting on the seat 1, choosing the outer surface that should make capillary 4 and detecting seat formation of its diameter closely contacts, and uses chemical, for example with the greasy dirt on acetone or the absolute ethyl alcohol cleaning components; Step preface 2 is passed capillary 4 and is detected seat 1, and makes capillary exceed about 0.5 millimeter of detection seat cavity bottom surface, cleans the raised area capillaceous with chemical again; Step preface 3 makes to be slightly larger than atmospheric pressure, the absolute pressure of 0.01 megabar and freezing a little for example, and 0 ℃ argon gas for example enters from an end of need welding capillary 4, sprays from its other end.
Step preface 4, the rotation argon arc welding machine that adopts non consumable arc welding electrode is from slightly away from striking on the metal detection pedestal of welding position capillaceous, then electric arc is moved near capillary, for example leave the about 0.2-0.5 millimeter of capillary, and make electric arc exceed a detection seat cavity bottom surface slightly, for example exceed under about 1-1.5 millimeter situation, detect pedestal, make it reach molten condition around the capillary heating; Step preface 5 is right after step preface 4, when the raised area capillaceous, because of the progressively fusion of heat of the puddle that detects pedestal, and and when detecting pedestal and being melt into one, cut off and extinguish arcs.
More than each welding step preface, operate by hand usually, welding current is adjustable to about 30 amperes, can cut off or extinguish arcs by the decay button that starts.
In said method, owing in capillary, constantly pass through a little freezing gas, so that in carrying out welding process, capillary can very fast fusing not cause capillary blocked because being subjected to cooling.
Therefore, adopt this welding method can guarantee the long capillary tube time under the high temperature more than 300 ℃, bear the maximum pressure about 40 megabars and do not produce liquid medium and sew through weld seam.
In addition, by the capillary to adopting welding method of the present invention to weld, with the capillary that adopts traditional Welding method to weld, with welded specimen its weld strength is compared test respectively, result of the test shows the former, namely adopt the parent of gas-cooling capillary from melting welding, sample bears the pulling force of 0.65 megabar, cause capillary to be broken, and weld seam is earlier good, and the latter, namely adopts the capillary of Welding, when sample bore 0.46 megabar pulling force, capillary was pulled out from the commissure. Therefore the former weld strength obviously is better than the latter's weld strength.
In addition, the capillary that the present invention proposes and the self smelting electric arc welding method for matrix of its connecting elements body, can not only be applicable to the manufacturing of pressure sensor, be applicable to that also other everyly carries out carrying out the welding situation between capillary and its connecting elements body at needs, all solve differ greatly Welding Problems between the part of this material thickness with the method.
Claims (4)
1, a kind of self smelting electric arc welding method for matrix of being connected between metal capillary and its connecting elements of being used for is characterized in that this method comprises following step preface.
Step preface 1 forms capillary by the hole on metal structure body, the diameter of this through hole makes capillary and hardware form tight the contact, with the through hole on chemical cleaning capillary and the metal structure body,
Step preface 2 makes an end capillaceous pass described metal structure body, and makes capillary exceed this slightly more than the metal structure body corresponding end-faces, and described welding will be carried out at this place,
Step preface 3 constantly feeds from an end capillaceous of need welding with the argon gas that is lower than environment temperature being slightly larger than environmental pressure, and from other end discharging capillaceous,
Step preface 4 adopts non consumable arc welding electrode rotation argon arc welding machine, from slightly away from striking on the metal structure body of welding position capillaceous, then electric arc is moved near capillary, and electric arc is exceeded more than the metal structure body end face slightly, around capillary heating of metal structure body, make the melting state that reaches
Step preface 5 is right after step preface 4, when capillary exceeds the progressively melting of part of metal structure body, and when merging into an organic whole with metal structure body, cuts off and extinguish arcs.
2, method according to claim 1 is characterized in that the argon gas in the described step preface 3 has the absolute pressure of about 0.01 megabar and has about about 0 ℃ temperature.
3, method according to claim 1 and 2 is characterized in that capillary exceeds about 0.5 millimeter of metal structure body end face in the described step preface 2, and electric arc leaves the peripheral about 0.2-0.5 millimeter of capillary in the described step preface 4, and electric arc exceeds the about 1-1.5 millimeter of metal structure body end face.
4, method according to claim 1 and 2 is characterized in that also having the step preface of cleaning described capillary the raised area and metal structure body on every side thereof with chemical between described step preface 2 and 3.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104155 CN1012216B (en) | 1987-06-09 | 1987-06-09 | Diapharm pressure sensor for flowing medium with high-temp. and high-pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1045242A true CN1045242A (en) | 1990-09-12 |
| CN1031327C CN1031327C (en) | 1996-03-20 |
Family
ID=4814756
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101804 Expired - Fee Related CN1031327C (en) | 1987-06-09 | 1987-06-09 | Self smelting electric arc welding method for matrix of metallic capillary tubes |
| CN 87104155 Expired CN1012216B (en) | 1987-06-09 | 1987-06-09 | Diapharm pressure sensor for flowing medium with high-temp. and high-pressure |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104155 Expired CN1012216B (en) | 1987-06-09 | 1987-06-09 | Diapharm pressure sensor for flowing medium with high-temp. and high-pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN1031327C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010019828A (en) | 2008-06-11 | 2010-01-28 | Epson Toyocom Corp | Diaphragm for pressure sensor, and pressure sensor |
| CN101526134B (en) * | 2009-04-10 | 2010-12-08 | 岳睿 | Sensor and explosive bolt on pressure vessel gate |
| JP2014055826A (en) * | 2012-09-12 | 2014-03-27 | Saginomiya Seisakusho Inc | Pressure sensor |
| CN103575450B (en) * | 2013-11-22 | 2016-02-03 | 邢台旭阳煤化工有限公司 | Liquid pressure measurement diaphragm closure means, mechanical indicating pointer tensimeter and pressure unit |
| CN105319006A (en) * | 2015-11-27 | 2016-02-10 | 上海立格仪表有限公司 | Multi-function tooling for production test of sensor |
| CN106124116A (en) * | 2016-07-27 | 2016-11-16 | 安费诺(常州)连接系统有限公司 | For detecting pressure transducer and the method for opposing liquid freezing and expansion pressure thereof of hydraulic pressure |
| WO2020010606A1 (en) * | 2018-07-13 | 2020-01-16 | Rosemount Inc. | Process diaphragm seal |
| CN110773847A (en) * | 2019-10-22 | 2020-02-11 | 贵州航天风华精密设备有限公司 | Stainless steel capillary lapping argon arc welding process |
-
1987
- 1987-06-09 CN CN 90101804 patent/CN1031327C/en not_active Expired - Fee Related
- 1987-06-09 CN CN 87104155 patent/CN1012216B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1012216B (en) | 1991-03-27 |
| CN87104155A (en) | 1987-11-18 |
| CN1031327C (en) | 1996-03-20 |
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