CN1031327C - 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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- CN1031327C CN1031327C CN 90101804 CN90101804A CN1031327C CN 1031327 C CN1031327 C CN 1031327C CN 90101804 CN90101804 CN 90101804 CN 90101804 A CN90101804 A CN 90101804A CN 1031327 C CN1031327 C CN 1031327C
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- capillary
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Abstract
The present invention relates to a welding method, particularly to an electric arc welding method of a capillary tube and a connected member thereof. Argon frozen to certain degree is utilized to pass through one end of the capillary tube and to be sprayed out from the other end to cool the capillary tube during welding in order to avoid that the end parts of the capillary tube are quickly melted. A non-melting pole rotary argon arc welding machine is used. The body of the metal member is heated by electric arc and is melted to make the corresponding end parts of the capillary tube gradually melted, and integrated with the metal member. Besides, the welding part of each welding component needs cleaning in advance during the welding process.
Description
The present invention relates to the self smelting electric arc welding method for matrix between stainless steel capillary and connected stainless steel component.
In instrument and meter, particularly comprise the pressure detecting instrument of pressure sensor etc., extensively adopt the transferring elements of Stainless Steel Capillary pipe component being used for the high pressure occasion, thereby produce the problem of the welding aspect of stainless steel capillary and connected stainless steel component 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, be bonded together and make with 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 fine material of fusing, 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).
At present, self smelting electric arc welding method for matrix also successfully is applied in the welding of stainless steel tube and corrosion resistant plate, have that welding quality is good, advantage such as the high production safety of production efficiency and low cost of manufacture, because the stainless steel tube diameter of mentioning here is usually more than 10mm, therefore, there is not the blocked problem of pipe (referring to " welding " 1987 the 2nd phases) in welding fashion.
In addition, Japan Patent JP59-35886 (A) also provides a kind of parent self-melting and welding method that is applicable to steel plate and plumbers shed, because the fusing point of copper and steel is different, this type of welding manner is similar to the soldering welding manner, and because the pipe of indication also is common notional pipe here, the easily blocked problem of pipe when therefore also not having welding.
Again because of the welding of the stainless steel capillary that the present invention said, usually be meant the welding between material thickness great disparity part again, it is unsuitable for adopting 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, the manufacturing to the pressure sensor that is used in the high-temperature high-pressure medium occasion makes troubles especially.
Therefore, purpose of the present invention is exactly to substitute traditional brazing mode in order to address these problems or to propose a kind of energy in order to adapt to this needs, and the stainless steel capillary of capillary obstruction and the self smelting electric arc welding method for matrix between connected stainless steel component do not take place during welding.
Comprise following step preface by welding method of the present invention:
Step preface 2 makes a described end capillaceous pass described member body, and makes this capillary slightly above this structure body corresponding end-faces,
Step preface 3 will constantly feed from an end capillaceous of need welding a little more than environmental pressure and the argon gas that is lower than environment temperature, and from other end discharging capillaceous,
Step preface 4 adopts non consumable arc welding electrode rotation argon arc welding machine., then electric arc is moved near described capillary, and makes electric arc away from striking on the described structure body of described welding position capillaceous from slightly, heat described structure body, make the melting state that reaches around described capillary slightly above described structure body end face,
Step preface 5 is right after step preface 4, when this capillary exceeds the progressively melting of part of described structure body, and when merging into an organic whole with described structure body, cuts off and extinguish arcs.
Welding method main feature of the present invention is to allow the argon gas that is subjected to a certain degree freezing and a little higher than environmental pressure pass 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, with electric arc the heating of stainless steel structure body parent is reached molten condition, thereby make respective end capillaceous part progressively fusing and and described structure body parent be melt into one, the result can make capillary firmly be welded on the member body, and during welding capillary is stopped up, reach the welding of carrying out described stainless steel capillary and connected stainless steel component body in high quality.
By the following examples and with reference to accompanying drawing the inventive method is described further.
Fig. 1 schematically illustrates the figure that the welding of adopting self smelting electric arc welding method for matrix of the present invention to carry out stainless steel capillary and stainless steel connecting elements is described.
Referring now to accompanying drawing 1,4 is stainless steel capillary, 1 stainless steel component that connects of capillary 4 or detect seat for this reason, 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 4, the rotation argon arc welding machine that adopts non consumable arc welding electrode is from slightly away from striking on the detection pedestal of described welding position capillaceous, then electric arc is moved near this capillary, for example leave 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 millimeters situations, detect pedestal, make it reach molten condition around the capillary heating; Step preface 5 is right after step preface 4, when this 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 welding machine.
In said method,, make in carrying out welding process that capillary can very fast fusing not cause capillary blocked because of being subjected to cooling owing in capillary, constantly pass through freezing a little gas.
Therefore, adopt this welding method can guarantee that stainless steel capillary for a long time under the high temperature more than 300 ℃, bears the maximum pressure about 40 megabars and do not produce liquid medium and sew through weld seam.
In addition, by stainless steel capillary to adopting welding method of the present invention to weld, with the stainless steel capillary that adopts traditional fine welding method to weld, with welded specimen its weld strength is compared test respectively, result of the test shows the former, the parent that promptly adopts gas-cooling capillary is from melting welding, sample bears the pulling force of 0.65 megabar, cause capillary to be broken, and weld seam is intact, and the latter, the capillary that promptly adopts soldering to weld, 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 stainless steel capillary that the present invention proposes and the self smelting electric arc welding method for matrix of connected stainless steel component 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 stainless steel capillary and the connected stainless steel component body at needs, all available the method solves differ greatly Welding Problems between the part of this material thickness.
Claims (1)
1. the parent self-melting and welding method of stainless steel capillary and stainless steel component comprises following step preface:
Step preface 1 forms described stainless steel capillary by the hole on described stainless steel component body, with the through hole on chemical cleaning capillary and the metal structure body,
Step preface 2 makes a described end capillaceous pass described member, and makes this capillary slightly above this structure body corresponding end-faces,
Step preface 3 adopts non consumable arc welding electrode rotation argon arc welding machine., then electric arc is moved near described capillary, and makes electric arc away from striking on the described structure body of described welding position capillaceous from slightly, described structure body is heated, make the melting state that reaches around described capillary slightly above described structure body end face,
Step preface 4 is right after step preface 3, when this capillary exceeds the progressively melting of part of described structure body, and when merging into an organic whole, cuts off and extinguish arcs with described structure body,
It is characterized in that this method also comprised between the preface and will constantly feed from an end capillaceous of need welding a little more than environmental pressure and the argon gas that is lower than environment temperature in above-mentioned the 2nd, 3 step, and from the step preface of other end discharging capillaceous.
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 CN1045242A (en) | 1990-09-12 |
| CN1031327C true CN1031327C (en) | 1996-03-20 |
Family
ID=4814756
Family Applications (2)
| 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 |
| 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 |
Family Applications Before (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) | CN1012216B (en) |
Families Citing this family (9)
| 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 |
| EP3821221B1 (en) | 2018-07-13 | 2022-11-02 | 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 |
| CN114910210A (en) * | 2021-02-07 | 2022-08-16 | 上海洛丁森工业自动化设备有限公司 | Pressure measuring device for measuring fluid medium pressure and pressure transmitter |
-
1987
- 1987-06-09 CN CN 87104155 patent/CN1012216B/en not_active Expired
- 1987-06-09 CN CN 90101804 patent/CN1031327C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN87104155A (en) | 1987-11-18 |
| CN1045242A (en) | 1990-09-12 |
| CN1012216B (en) | 1991-03-27 |
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