CN1077672A - The resistance spot welding process of cast iron and steel - Google Patents
The resistance spot welding process of cast iron and steel Download PDFInfo
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- CN1077672A CN1077672A CN 93100953 CN93100953A CN1077672A CN 1077672 A CN1077672 A CN 1077672A CN 93100953 CN93100953 CN 93100953 CN 93100953 A CN93100953 A CN 93100953A CN 1077672 A CN1077672 A CN 1077672A
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- cast iron
- welding
- steel
- steel plate
- spot welding
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Abstract
The resistance spot welding process of a kind of cast iron and steel, its technical characterictic is: with coating additive after the workpiece position to be welded cleaning, be put between mash welder two electrodes and carry out " 1. two fire " or " pulsatile once " spot welding.Its electrode material copper alloy, the current density of steel plate lateral electrode end face is Jw=100～400A/mm
2, cast iron lateral electrode end face compression is Fw=50～200N/mm
2, the weld heating time is 0.04～0.5 second.The surface of the work smooth and beautiful appearance of this welding procedure welding, joint performance is higher than the cast iron mother metal; Technology is simple, the production efficiency height.Can be widely used in the welding between cast iron plate and the steel plate.Also can be used for cast iron plate and steel thick big or cast iron thick big with steel plate between electric resistance welding be connected.
Description
The invention belongs to a kind of welding procedure, the resistance spot welding process of particularly a kind of cast iron and steel.
At present, cast iron roughly has following several method with being connected of steel: 1 arc welding method only is applicable to that generally thicker big workpiece connects.Because heating surface (area) (HS is big, so distortion is big, joint area is easy to generate crackle.2 gas welding methods generally are applicable to being connected between thick big ironcasting and the steel part, and this welding method distortion is bigger, and production efficiency is low.3 riveted joint or bolt methods of attachment generally are used for the connection between the plate.This method surface of the work exists manufactured head or bolt head, and the surface of the work out-of-flatness is not attractive in appearance, and influence is used; And operation is many, and production efficiency is low.4 adhering methods, though this method applicable to the cast iron of all thickness and being connected of steel, joint can only use at low temperatures, and intensity difference, simultaneously to surface of the work cleaning require high, cost is high.Require smoothly, attractive in appearance for surface of the work, and being connected of the cast iron that at high temperature uses and steel, present still do not have a kind of more satisfactory method of attachment.
One of purpose of the present invention is to overcome weak point of the prior art and resistance spot welding process that a kind of cast iron and steel are provided:
Two of purpose of the present invention provides the additive formulations that a kind of cast iron and steel resistance spot welding are used.
Purpose of the present invention can realize by following measure:
The resistance spot welding process step of cast iron and steel is:
(1) cleaning workpiece to be welded is welded the position;
(2) smear additive at the position of being welded of workpiece;
(3) position of being welded with workpiece closely overlaps, and is put between the upper and lower electrode of resistance welder and carries out spot welding, and the process conditions of its spot welding are:
A. electrode material is a copper alloy, and steel plate lateral electrode end face diameter is 3～8mm.When steel plate and cast iron plate thickness compared less than 1: 3, cast iron lateral electrode end face diameter was 1～4 times of steel plate lateral electrode end face diameter.
B. the welding current density Jw=100～400A/mm of steel plate lateral electrode end face
2
C. cast iron lateral electrode end face compression is Fw=50～200N/mm
2
D. be 0.04～0.5 second weld interval.
The resistance welder electrode material is chrome copper, silicon copper, monel etc.The constituent that workpiece is welded the additive of smearing at the position is: (weight %) graphite powder (＞200 order) 50～100%, nickel powder (＞120 order) 0～20%, aluminium powder (＞120 order) 0～30%.
The invention will be further described below in conjunction with embodiment:
Embodiment 1
Bore is that φ 280mm, wall thickness are that cast iron frying pan and the wall thickness of 1.5mm is the A of 1mm
3Connection between the steel handle, its technology is as follows:
(1) welded the obvious rusty stain and the greasy dirt at position with sand paper removing skillet and steel handle;
(2) because there is the skim graphite powder in the skillet surface, so can not smear additive;
(3) with the soldered position overlap joint of skillet and steel handle closely, be put between common frequency spot welding machine two electrodes of DN-100 type, adopt " 1. two fire " spot welding method, promptly to the welding method of twice of same welding position series spot welding.Its process conditions are:
A. adopt the chrome copper electrode, upper and lower electrode diameter D=16mm, steel handle side top electrode end face diameter d
On=5mm, skillet side bottom electrode end face diameter d
Down=8mm.
B. welding current I=7.2KA.
C. electrode pressure Fw=5000 newton.
D. be 15 weeks heat time heating time.
Through check, weld strength satisfies instructions for use.
Embodiment 2
Be connected between the cast iron plate of thick 3mm and the steel plate of thick 2mm, its welding procedure step is:
(1) additive preparation: with 400 grams, 200 purpose graphite powders and 50 gram 150 purpose nickel powders and 50 restrain 150 purpose aluminium powders put together mix stand-by.
(2) remove the rusty stain and the greasy dirt at cast iron plate and steel plate position to be welded with sand paper.
(3) be coated with at cast iron plate and steel plate position to be welded and spread the additive that skim prepares.
(4) cast iron plate and steel plate position to be welded overlap joint is tight, be put between two electrodes of DM-100 type alternating-current pulse welding machine, carry out pulsatile once spot welding, its process conditions are:
A. select the silicon copper electrode for use, upper and lower electrode diameter D=40mm, steel plate side top electrode end face diameter d
On=8mm, cast iron plate side bottom electrode end face diameter d
Down=16mm.
B. welding current I=15KA.
C. electrode pressure Fw=20000 newton.
D. be 10 pulses heat time heating time.
Through check, welding position intensity is greater than cast iron matrix intensity.
Embodiment 3
Be connected between the cast iron plate of thick 1.5mm and the steel plate of thick 3mm, its welding procedure step is:
(1) additive preparation, with 200 grams, 250 purpose graphite powders restrain with 120 grams, 200 purpose aluminium powders and 80,200 purpose nickel powders put together mix stand-by.
(2) remove the rusty stain and the greasy dirt at position to be welded on cast iron plate and the steel plate with sand paper.
(3) be coated with at cast iron plate and steel plate position to be welded and spread the additive that skim prepares.
(4) cast iron plate and steel plate position to be welded overlap joint is tight, be put between common frequency spot welding machine two electrodes of DN-100 type, adopt " 1. two fire " spot welding method, its process conditions are:
A. select the monel electrode for use, upper and lower electrode diameter D=40mm, steel plate side top electrode end face diameter d
On=5mm, cast iron plate side bottom electrode end face diameter d
Down=16mm.
B. welding current: I=8KA.
C. electrode pressure: Fw=10000 newton.
D. be 20 weeks heat time heating time.
Through check, welding position intensity is greater than cast iron matrix intensity.
The present invention compared with prior art has the following advantages:
The welding work pieces smooth surface, attractive in appearance, no concave-convex is uneven, joint performance is higher than the cast iron mother metal; Welding procedure is simple, and can improve workman's working condition, is connected with riveted joint or bolt that comparing enhances productivity reaches more than 10 times.
Claims (3)
1, the resistance spot welding process of a kind of cast iron and steel is characterized in that:
The processing step of spot welding is:
(1) cleaning workpiece to be welded is welded the position;
(2) smear additive at the position of being welded of workpiece;
(3) position of being welded with workpiece closely overlaps, and is put between the upper and lower electrode of resistance welder and carries out spot welding, and the process conditions of its spot welding are:
A. electrode material is a copper alloy, and steel plate lateral electrode end face diameter is 3～8mm, and when steel plate and cast iron plate thickness compared less than 1: 3, cast iron lateral electrode end face diameter was 1～4 times of steel plate lateral electrode end face diameter;
B. the welding current density of steel plate lateral electrode end face is Jw=100～400A/mm
2
C. cast iron lateral electrode end face compression is Fw=50～200N/mm
2
D. be 0.04～0.5 second weld interval.
2, according to the said spot-welding technology method of claim 1, it is characterized in that: electrode material is chrome copper, silicon copper, monel etc.
3, a kind of as used additive in the said welding procedure of claim 1, it is characterized in that: the constituent of additive is (weight %): graphite powder (＞200 order) 50～100%, nickel powder (＞120 order) 0～20%, aluminium powder (＞120 order) 0～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100953 CN1028320C (en) | 1993-01-17 | 1993-01-17 | Resistance spot welding technique for cast iron and steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100953 CN1028320C (en) | 1993-01-17 | 1993-01-17 | Resistance spot welding technique for cast iron and steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1077672A true CN1077672A (en) | 1993-10-27 |
| CN1028320C CN1028320C (en) | 1995-05-03 |
Family
ID=4983332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93100953 Expired - Fee Related CN1028320C (en) | 1993-01-17 | 1993-01-17 | Resistance spot welding technique for cast iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028320C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439026C (en) * | 2005-06-23 | 2008-12-03 | 彩虹集团电子股份有限公司 | Thermocompression bend welding technology of metal component part |
| WO2011092713A2 (en) * | 2010-01-29 | 2011-08-04 | Aditya Birla Science And Technology Company Limited | An electrically conductive coating for spot welding applications |
| CN102285292A (en) * | 2010-06-21 | 2011-12-21 | 苏州汉扬精密电子有限公司 | Appearance treatment process for plastic products |
| CN102441731A (en) * | 2011-11-14 | 2012-05-09 | 江苏大学 | Method for increasing service life of aluminium alloy spot-welding electrode |
| TWI504457B (en) * | 2012-11-02 | 2015-10-21 | Univ Nat Pingtung Sci & Tech | A spot welding method for lap-joint of multi-metal sheets |
| CN108015401A (en) * | 2016-11-04 | 2018-05-11 | 宝山钢铁股份有限公司 | Zinc coated high strength steel resistance spot welding method with good joint performance |
| CN108838500A (en) * | 2018-08-22 | 2018-11-20 | 青岛万沅金属制品有限公司 | Washing machine frame spot-welding technology |
-
1993
- 1993-01-17 CN CN 93100953 patent/CN1028320C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439026C (en) * | 2005-06-23 | 2008-12-03 | 彩虹集团电子股份有限公司 | Thermocompression bend welding technology of metal component part |
| WO2011092713A2 (en) * | 2010-01-29 | 2011-08-04 | Aditya Birla Science And Technology Company Limited | An electrically conductive coating for spot welding applications |
| WO2011092713A3 (en) * | 2010-01-29 | 2011-10-06 | Aditya Birla Science And Technology Company Limited | Electrically conductive coating for spot welding applications and process thereof |
| CN102285292A (en) * | 2010-06-21 | 2011-12-21 | 苏州汉扬精密电子有限公司 | Appearance treatment process for plastic products |
| CN102285292B (en) * | 2010-06-21 | 2013-02-06 | 苏州汉扬精密电子有限公司 | Appearance treatment process for plastic products |
| CN102441731A (en) * | 2011-11-14 | 2012-05-09 | 江苏大学 | Method for increasing service life of aluminium alloy spot-welding electrode |
| CN102441731B (en) * | 2011-11-14 | 2014-02-12 | 江苏大学 | Method for increasing service life of aluminium alloy spot-welding electrode |
| TWI504457B (en) * | 2012-11-02 | 2015-10-21 | Univ Nat Pingtung Sci & Tech | A spot welding method for lap-joint of multi-metal sheets |
| CN108015401A (en) * | 2016-11-04 | 2018-05-11 | 宝山钢铁股份有限公司 | Zinc coated high strength steel resistance spot welding method with good joint performance |
| CN108015401B (en) * | 2016-11-04 | 2020-06-23 | 宝山钢铁股份有限公司 | Resistance spot welding method for galvanized high-strength steel with good joint performance |
| CN108838500A (en) * | 2018-08-22 | 2018-11-20 | 青岛万沅金属制品有限公司 | Washing machine frame spot-welding technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1028320C (en) | 1995-05-03 |
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