GB2417706A - Spot welding heater tube to flange - Google Patents
Spot welding heater tube to flange Download PDFInfo
- Publication number
- GB2417706A GB2417706A GB0505239A GB0505239A GB2417706A GB 2417706 A GB2417706 A GB 2417706A GB 0505239 A GB0505239 A GB 0505239A GB 0505239 A GB0505239 A GB 0505239A GB 2417706 A GB2417706 A GB 2417706A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flange
- welding
- thermally conductive
- stainless steel
- tube
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 claims abstract description 32
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 30
- 239000010935 stainless steel Substances 0.000 claims abstract description 30
- 238000005304 joining Methods 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052802 copper Inorganic materials 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 201000002266 mite infestation Diseases 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
- B23K11/20—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded of different metals
-
- 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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot 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
- B23K11/14—Projection welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a stainless steel heater tube and welding procedure for preparation thereof. The welding procedure comprises the steps of positioning the stainless steel heater tube 5 to be joined at a thermally conductive and temperature control region 4 of the flange 8; and joining both heater tube 5 and the flange 8 together by spot welding. After completion of welding, the surface colour of welding region of the finished product remains unchanged. Preferably, two ends of the heater tube 5 are also laser welded to two holes in the flange 8. Preferably, screw studs (12, figure 2) and a thermally conductive copper sheet 11 are also joined to the flange 8 by spot welding. The flange 8 preferably includes convex points 7,10 to strengthen the spot welds joining the heater tube 5 and copper sheet 11 respectively to the flange 8. The arrangement may be used in an immersion heater.
Description
24 1 7706 STAINLESS STEEL lEIEATl:R TUBE AND WELDING PROCEDURE FOR
PREPARAT1 ON THEREOF
BACKGROUND OF THE INVENTION
The present invention relates to a worldling procedure for production of a heater tube, and more particularly to a welding procedure for preparation of a stainless steel heater tube. The present invention also relates to a stainless steel heater tube which is prepared by means of said welding procedure.
Many heater tubes, for example various immersion stainless steel heater tubes, are currently used for various purposes, including heating and maintaining the temperature of water in a cup or a pot, in which the heater tube is connected to a thermally conductive and temperature control trench on a flange used for fixing the heater tube. In the prior art, the heater tube is connected to the temperature control place being in the convex-concave form by means of the traditional welding procedures, without any part having good thermal conductivity to be supplemented.
Thus, welded heater tubes need to be electroplated or are subject to a sand blasting surface treatment. As a result, production efficiency is decreased and the cost of ] ! production wild rise. In addition, due to using the traditional welding procedures, for example gun welding, hot welding (furnace welding), argon arc welding etc. As far as the gun welding is concerned, after such welding, the heater tube welded is difficult to be purged so that further electroplating needs to be done. Subject to this treatment, the heater tube is easy to be out of shape. If using the furnace welding, it is carried out at about i,000DC, whereby colouriTIg the heater tube black and requiring it to be subjected to the surface treatment. Similarly, when using argon arc welding, the welding surface will become black and the welding slag is entrapped on it so that such surface has to be treated.
SUMMARY OF THE INVENTION
In order to solve the technical problems arising in welding the heater tubes, an object of the present invention is to provide a welding procedure for production of a stainless steel heater tube, which is high in production efficiency, good in welding quality and is capable of substantially improving thermally conductive performance.
Another object of the present invention is to provide a stainless steel heater tube which is produced by means of said welding procedure.
A technical scheme provided by the present invention is that: a welding procedure for combining a stainless steel heater tube with a flange used for fixing it comprises the following steps of: positioning the stainless steel heater tube to be joined at a thermally conductive and temperature control trench of the flange; and b) by spot welding machine, the welding parameters of which are as follows; voltage (V): 270-320; ] O squeeze time (cycle): 15-25; pressing time (cycle): 8-15.
In order further to improve the welding quality, two tube ends of the stainless steel electrothermal tube and two holes on the flange should be joined by means of ]5 laser welding technique. Thus, the welded portions are not oxidated and coloured so that original colour of stainless steed is kept and no any surface treatment is required.
Therefore, the welding procedure in accordance with the present invention further comprises the steps of: a) clampings two tube ends of the stainless steed electrothermal tube welded by step c) of claim] and two holes on the flange by means of a clamp means; and b) joining the end tubes and the flange together by means of laser welding machine.
In the welding procedure in accordance with the present invention, at least one convex point is provided on the thermally conductive and temperature control trench on the flange used for fixing the stainless steed electronthermal tube and at least one convex point is also provided on the thermally conductive and temperature control place on the Mange joined up to the electrothermal tube.
The advantages of the present invention reside mainly in the fact that: due to that at least one convex point is respectively provided on the thennally conductive and temperature control trench and place of the flange, this point or these points may serve as connecting place(s) when spot welding, thereby improving its reliability and efficiency. In comparison with the genera] welding methods, it is simple in operation, reliable in safety performance and energy saving as well as good thermal conductivity of the stainless steel heater tube thus being wedded can be kept. As a result, energy saving, high productivity and stable welding quality can be carried out by the welding procedure in accordance with the present invention. Without changing original colour of the stainless steel tube. Preferably, joining the tube ends of the stainless steed heater tube to the holes on the flange is perfonned by laser welding technique. Thus, the welding positions are not easy to be oxidated and coloured so that it is not necessary for the welded surface to make any treatment.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is further elucidated below in relation to illustrative embodiments and to the attached drawings. In this case: FIG. l is a front view of a flange of the present invention showing the spot welding of screw studs to the flange; FIG. 2 is a top view thereof; FIG. 3 is a partially enlarged cross-sectional view talon on line A-A of FIG. l; FIG. 4 is a front view of a Pange of the present invention showing the spot welding of a thennally conductive copper sheet to the flange, FIG. is a partially enlarged cross-sectional view taken on line B-B of FIG 4, showing spot welding of the thermally conductive copper sheet to the flange; s FIG 6 is a front view of a flange of the present Invention showing the spot welding of the stainless steel heater tube to the thermally conductive and temperature control place on the flange; FIG 7 is a partially enlarged cross-sectional vieNN7 taken on line C-C of FIG. 6, showing spot welding oi the stainless steel heater tube to the thermally conductive and temperature control place on the flange; FIG 8 is a partially enlarged cross-sectional view taken on line D-D of FIG. 7, showing a thermally conductive and temperature control place on the flange; FIG 9 is a front view of a flange of the present invention showing the laser I O welding of the tube ends of the stainless steel heater tube to two holes on the flange; FIG. 10 is a left side view of FIG. 9, and FIG 11 is a partially enlarged cross-sectional view taken on line E-E of FIG. 9, showing laser welding of the tube end of the stainless steel heater tube to the hole on the flange.
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS 1 to 11, the stainless steel heater tube in accordance with the present invention is constructed of a stainless steel electrotl1ennal tube 5, a flange 8, l screw studs 12, a thermally conductive copper sheet 11, the full welding procedure of which is as follows: (a) joining screw studs on desired positions of the flange by spot welding, as shown in FIGS I to 3; (b) joining a thennal]y conductive copper sheet 11, on a trench 9 of the flange by spot welding, as shown in FIG. 4; (c) joining a stainless steel electrothermal tube on therrnal]y conductive and temperature control place of the flange by spot welding; and (d) joining two tube ends of the stainless steel electrothermal tube 5, on two I O holes of the flange 8.
Therein steps (a) and (b) may also follow the steps (c) and (d).
More particularly, first of all, joining three screw studs 12 in a triangular maimer on the flange by means of spot welding and its welding procedure is as follows: (a) preparing a flange 8 by punching and screw studs 12, and producing a related clamping means for use as a locator; (b) testing the welding parameters and the positions of the clamping means to meet the requirements of the product to be welded; (c) putty.- three screw studs in the clamping means respectively and the flange at a]ocaton to be wedded and then the operator depresses the foot pedal to cause the welding electrodes to bring into contact with each other thereby performing one spot welding, and (d) releasing' the foot pedal, taliin' off the fixed c]ampino means, rotating it by 45 degrees, locating again, carrying out another spot welding until spot welding of three screw studs 12 are completed, by reference to FIGS] to 3.
Then, joining a thermally conductive copper sheet 11 on the flange is carried out by spot welding. A trench 9 is provided on the flange 8 and some convex points are provided on the trench 9. Due to these points, such a connection is not easy to be disconnected. As a result, good heattransfer property of the stainless steel heater tube is guaranteed. The welding procedure therefore is as follows: (a) preparing a flange 8 on which three screw studs have been mounted by spot welding and a thennally conductive copper sheet 11; (b) adjusting a sma]] table spot welding machine to desired welding parameters; and (c) in operation, the flange is placed in a leveling manner on the bottom electrode head and the thermally conductive copper sheet I] is mounted on the convex points on the trench 9 of the Mange. the operator then depresses the foot pedal to malice the top electrode head contact with the bottom one, thereby performing one spot welding, by reference to FIGS 4 and5.
Next, joining the stainless steed electrothenna] tube to the thermally conductive and temperature control place 4 of the flange is performed. By the way, some convex points are provided on such the place 4. This welding procedure is as follows: (a) assembling the flange g on which the screw studs 12 and the thermally conductive copper sheet 11 as well as the stainless electrothermal tube according to the welding requirements; (b) mounting the clamping means for position to the copper electrode of the spot welding machine and adjusting contact, distance and the welding 1 5 parameters: voltage (V): 270-320; squeeze time (cycles): 15-25; pressing time (cycles): 8-15; and (c) making the assembled stainless steel electrothermal tube 5 contact with the bottom electrode head and the clamping means and then depressing the foot peda] to make the top electrode head contact with the bottom one, thereby performing one spot welding, by reference to FIGS 6 to S. Finally, joining two tube ends of the electrothermal tube to two holes on the flange X is made by laser welding technique, the welding procedure of which is as follows: (a) taking the stainless steel electrothermal tube 5 which is welded on the temperature control place ofthe flange 8; (b) starting up XY laser welding machine, mounting the proper clamping means on the worktable of the laser welding machine and adjusting welding position and welding parameters: voltage (V):020; single phase peak power: KKW; power consumption: 6KVA; welding time depends on the pipe diameter, for example, welding time: 1-3 seconds for 6.5mm pipe; (c) placing the stainless steel electrothenna] tube in a desired direction in the clamping means in order to make the flange g contact with a flat surface of the clamping mcan.s, making two tube ends of the stainless steed electrothermal tube to be clamped by means of the clamping means and mechanical arm; lo (d) selecting INP-CNC from the menu file on the display and clicl; it, then finding TXT and clicl; C)K, thereby performing at the same time welding of two tube ends; and (e) after completion of welding, releasing the clamping means and mechanical arm and then taking this finished product out, by reference to FIGS. 9 to 11.
By means of visual observation of the finished product, it shows that the surface co]our of its welding region remains unchanged.
Claims (8)
1. A welding procedure for combining a stainless steel heater tube with a Lange used for fixing it, characterized in that the welding procedure comprises the following steps of: a) positioning the stainless steel heater tube to be joined at a thermally conductive and temperature control trench of the flange; and b) by spot welding machine, the welding parameters of which are as follows; voltage (V): 270-320; squeezetime(cycle): 15-25; pressing time (cycle): 8-15.
2. The welding procedure according to claim 1, characterized in that the welding procedure also comprises the steps of: a) clamping two tube ends of the stainless steel electrothermal tube welded by step c) of claim 1 and two holes on the flange by means of a clamp means; and b) joining the end tubes and the flange together by means of laser welding machine.
3. The welding procedure according to claim 1, characterized in that at least one convex point is provided on the thermally conductive and temperature control trench of the flange.
4. The welding procedure according to claim 1, characterized in that at least one convex point is provided on the thermally conductive and temperature control place of the flange in which the heater tube is connected to the flange by spot welding.
S. The welding procedure according to claim 1, characterized in that before welding, the welding procedure further comprises the step of joining screw studs on desired positions of the flange as well as a thermally conductive copper sheet on a thermally conductive and temperature control trench of the flange by means of spot welding.
6. A stainless steel heater tube, Welch is constructed of a stainless steel electrothermal tube, a flange, three screw studs and a thermally conductive copper sheet by welding, characterized in that at least one convex point is respectively provided on the thermally conductive and temperature control trench and place of the flange.
7. A welding procedure substantially as hereinbefore described with reference to the accompanying drawings.
8. An electrothermal tube substantially as hereinbefore described with reference to the accompany drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100513687A CN100469507C (en) | 2004-09-01 | 2004-09-01 | Welding process for stainless steel heating tube and stainless steel heating tube |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0505239D0 GB0505239D0 (en) | 2005-04-20 |
| GB2417706A true GB2417706A (en) | 2006-03-08 |
| GB2417706B GB2417706B (en) | 2006-11-01 |
Family
ID=34602436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0505239A Expired - Fee Related GB2417706B (en) | 2004-09-01 | 2005-03-15 | Stainless steel heater tube and welding procedure for preparation thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100469507C (en) |
| GB (1) | GB2417706B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523641A (en) * | 2011-12-19 | 2012-06-27 | 王荣其 | Manufacturing method of heating pipe for oil heater |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433631A (en) * | 2013-09-09 | 2013-12-11 | 芜湖苏立实业有限公司 | Nickel-base brazing process of heating tube |
| CN103909353A (en) * | 2014-03-12 | 2014-07-09 | 无为虹波电器有限公司 | Welding process of semi-finished electrical heated tube and flange |
| CN104308313B (en) * | 2014-09-26 | 2016-09-07 | 芜湖恒美电热器具有限公司 | A kind of rustless steel heat-generating pipe and flange nickel-base soldering processes |
| CN110653613B (en) * | 2019-10-11 | 2021-06-29 | 嘉兴市霍克尔设备制造有限公司 | Honeycomb metal tubular product apparatus for producing |
| CN113146008B (en) * | 2021-05-10 | 2023-03-28 | 哈尔滨锅炉厂有限责任公司 | Automatic welding equipment and method for hanging pipe of power station boiler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB388687A (en) * | 1931-09-16 | 1933-03-02 | Schmidt Sche Heissdampf | Improvements in and relating to smoke-tube superheaters in which the return bends ofthe superheater elements project into the fire-box, combustion chamber or the like |
| JPH04313469A (en) * | 1991-04-12 | 1992-11-05 | Nhk Spring Co Ltd | Spot welding structure for pipe |
| NL1000333C1 (en) * | 1995-05-10 | 1995-08-23 | Bema Konvektoren Bv | Radiant space heating panels |
| JPH0958281A (en) * | 1995-08-21 | 1997-03-04 | Aichi Mach Ind Co Ltd | Mounted structure of filler tube |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1041922A (en) * | 1976-08-16 | 1978-11-07 | Harold Ahrbeck | Thermoplastic pipe stub end |
| KR100281023B1 (en) * | 1992-04-13 | 2001-02-01 | 가나이 쓰도무 | Long tubular grounding vessel for gas insulated electrical equipment and laser welding equipment for manufacturing the same |
| CN2314885Y (en) * | 1998-01-20 | 1999-04-21 | 高海燕 | Welding device |
| CN2355509Y (en) * | 1998-05-10 | 1999-12-22 | 黄应林 | Heating pipe for electric water heater |
| DE10053789B4 (en) * | 2000-10-30 | 2009-11-26 | Volkswagen Ag | Laser welding |
| CN1215305C (en) * | 2003-08-25 | 2005-08-17 | 朱震 | Support frame of drying equipment and its manufacturing method |
-
2004
- 2004-09-01 CN CNB2004100513687A patent/CN100469507C/en not_active Expired - Fee Related
-
2005
- 2005-03-15 GB GB0505239A patent/GB2417706B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB388687A (en) * | 1931-09-16 | 1933-03-02 | Schmidt Sche Heissdampf | Improvements in and relating to smoke-tube superheaters in which the return bends ofthe superheater elements project into the fire-box, combustion chamber or the like |
| JPH04313469A (en) * | 1991-04-12 | 1992-11-05 | Nhk Spring Co Ltd | Spot welding structure for pipe |
| NL1000333C1 (en) * | 1995-05-10 | 1995-08-23 | Bema Konvektoren Bv | Radiant space heating panels |
| JPH0958281A (en) * | 1995-08-21 | 1997-03-04 | Aichi Mach Ind Co Ltd | Mounted structure of filler tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523641A (en) * | 2011-12-19 | 2012-06-27 | 王荣其 | Manufacturing method of heating pipe for oil heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1586782A (en) | 2005-03-02 |
| GB2417706B (en) | 2006-11-01 |
| CN100469507C (en) | 2009-03-18 |
| GB0505239D0 (en) | 2005-04-20 |
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Effective date: 20110315 |