CN104096973B - Hollow piston lever of reducer laser non-melt pole twin arc composite welding process - Google Patents
Hollow piston lever of reducer laser non-melt pole twin arc composite welding process Download PDFInfo
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- CN104096973B CN104096973B CN201410327329.9A CN201410327329A CN104096973B CN 104096973 B CN104096973 B CN 104096973B CN 201410327329 A CN201410327329 A CN 201410327329A CN 104096973 B CN104096973 B CN 104096973B
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- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a kind of hollow piston lever of reducer laser non-melt pole twin arc composite welding process, comprises the following steps: 1) by the solid stifled clamping of hollow piston lever of reducer and two ends on fixture; 2) preposition argon-arc welding gun, the laser head of Laser Welding and rearmounted argon-arc welding gun are set, fill protective atmosphere; 3) started by preposition argon-arc welding gun, preheating is after 1 ~ 2 second, and laser head and rearmounted argon-arc welding gun start work simultaneously; 4) utilize frock to be rotated a circle by part to be welded, welding end with weld starting point and have the amount of lap of 0.5 ~ 3mm; 5) after welding terminates, first laser head quits work, and then preposition argon-arc welding gun quits work, and the arc current of last rearmounted argon-arc welding gun adopts and fades to 0 end welding.Piston rod weld metal zone is in molten condition by this welding procedure in advance, and laser absorption rate is significantly improved, and its gained face of weld is even, attractive in appearance, and reduces the required precision of piston rod clamping device.
Description
Technical field
The invention relates to a kind of hollow piston lever of reducer laser non-melt pole twin arc composite welding process, for the welding procedure of the circular weld that automobile-used hollow piston lever of reducer connects, belongs to welding technology field.
Background technology
Automobile absorber is a key and requisite parts, and its product quality has very important impact to Integral automobile security.Auto parts and components manufacturing enterprise departs from car load enterprise and forms specialized parts group, is just becoming a kind of trend of globalization.Along with automobile industry comes into effect parts " globalized purchase " strategy and international transnational Automobile Enterprises implementation Localization Strategy in the world, will there is huge parts accessory breach in domestic market.At present, domestic damper output can not be met the need of market far away, and supply falls short of demand especially for the damper of especially medium-to-high grade automobile, and therefore, the seed output and quality improving damper is one of strategic objective of Present Domestic damper manufacturing enterprise survival and development.
Current solid piston bar occupies more than 90% in the world market share of bumper assembly, along with the trend of automotive light weight technology and the high requirement (in real time monitoring realized in driving process data) of high-end vehicle to security day by day harsh, use hollow piston rod to be following important development direction as bumper assembly (hollow rod lining puts stress and displacement sensor to realize real-time monitoring vehicle transport condition).
Current, friction welding is the main connecting process of automotive shock absorber piston bar.But due to friction welding, to there is heat affected area large, commissure coarse grains, problems such as faying face is easy to crack and seriously restrict service life and the security of piston rod.From welding efficiency angle, need after upset with lathe tool, projection to be excised, therefore friction welding complex procedures, inefficiency.
Along with the heavy industrialization of optical fiber laser is applied, adopt the new way that laser weld is metal tube, plate welds.The advantages such as its welding quality is excellent, heat affected area is little are extensively approved.But laser weld exists with high costs, frock to be required the problem such as high and limited to apply widely.Laser ~ arc composite heat source welding is a kind of high-quality high-efficiency welding new technology [British scholar Steen attempts laser beam and argon arc being combined (Steen WM (1980) Arc augmented laser processing of materials. J Appl Phys 51 (11): 5636 – 5641)] laser weld and arc welding combined, find that electric arc can strengthen Laser Welding and ask the adaptability that gap changes reduce the requirement to workpiece assembly precision to workpiece assembling.The molten pool metal of fusing can also improve the absorptivity to laser.
But, high-capacity optical fiber laser cost is higher and increase fusion penetration is limited, simultaneously cross conference due to voltage drop during the starting the arc of big current tungsten argon arc welding gun to cause severe jamming to laser safety circuit and cause actual power significantly to reduce, and big current cause these problems such as weld seam tungsten inclusion perplex all the time laser ~ electric arc combined solder technology at metal material at a high speed, the application in penetration fustion welding field.In addition, in view of tubing welding particularity, tail end thermal accumlation and cause welding process latter half and ending time there is problems affect pipe fitting performance and the apparent masses such as weld seam stays, tail hole.
Find that the identical people of University Of Tianjin Lee application discloses that the two consumable electrode composite welding System and method for of a kind of laser through retrieval, but consumable electrode welding needs filler wire, and the unstability of the parameter matching of the parameters such as wire feed rate and laser weld makes the unstability of welding process increase.Therefore by not changing mother metal material property, improving the aspect consideration such as welding efficiency and cost angle (silk filling), non-melt pole electrical arc is adopted to have more performance and cost advantage.
Summary of the invention
The technical problem that the invention will solve is to provide a kind of hollow piston lever of reducer laser non-melt pole twin arc composite welding process, piston rod weld metal zone is in molten condition by this welding procedure in advance, laser absorption rate is significantly improved, reduce the operating current of rearmounted electric arc, realize at a high speed, welding system electric current is protected while penetration fustion welding, stablizing with the high reliability and the stability that keep whole welding production line of voltage, its gained face of weld is even, attractive in appearance, reduce laser power requirements simultaneously, extend the electric arc tungsten electrode life-span, improve speed of welding, and reduce the required precision of piston rod clamping device.
For overcoming the above problems, the concrete technical scheme of the invention is as follows: a kind of hollow piston lever of reducer laser non-melt pole twin arc composite welding process, comprises the following steps:
1) by the solid stifled clamping of hollow piston lever of reducer and two ends on fixture, and ensure concentricity;
2) set gradually preposition argon-arc welding gun, the laser head of Laser Welding and rearmounted argon-arc welding gun at hollow piston lever of reducer and solid stifled to-be-welded region, fill protective atmosphere;
3) preposition argon-arc welding gun is started, preposition electric arc is utilized to carry out preheating to to-be-welded region, after within 1 ~ 2 second, waiting for, striking deposite metal above the weld metal zone of workpiece, laser head and rearmounted argon-arc welding gun start work simultaneously, and namely Laser Welding and twin arc carry out penetration fustion welding melting weld metal zone simultaneously;
4) utilize frock to be rotated a circle by part to be welded, rotation speed change scope is 0.07m/s ~ 0.3m/s, welding end with weld starting point and have the amount of lap of 0.5 ~ 3mm;
5) after welding terminates, first laser head quits work, and then preposition argon-arc welding gun quits work, and the arc current employing of last rearmounted argon-arc welding gun fades to 0A and terminates welding.
Preferably, in described step 2, protective atmosphere is argon gas, and change in flow scope is 10 ~ 20m--
3/ min.
Preferably, the process conditions that described step 3 needs are the curent change scope of preposition argon-arc welding gun is direct current 50A ~ 150A, and the curent change scope of rearmounted argon-arc welding gun is direct current 50A ~ 150A, and laser power is 500W ~ 1500W.
Preferably, in described step 3, preposition argon-arc welding gun head and hollow piston lever of reducer weld metal zone distance are 3 ~ 7mm, and with weld metal zone vertical direction angle 30 °, laser head and rearmounted argon-arc welding gun distance are 5 ~ 10cm, variable angle scope 10 ~ 45 °.
Preferably, the wall thickness range of described hollow piston lever of reducer is 1 ~ 10mm, and material is the aluminum alloy materials of ferrous materials or high-intensity high-tenacity.
This hollow piston lever of reducer laser non-melt pole twin arc composite welding process adopts preheated electric arc first preheating melt weld metal zone metal, then laser and rearmounted electric arc act on down simultaneously and carry out composite welding, at the end of welding, laser instrument first quits work, but rearmounted arc-welding electric current stops with gradual manner.This technique reduces heavy wall lever welding fixture precision, improves speed of welding, also effectively eliminates harm that high current arc arcing voltage falls simultaneously and prevents weld seam tungsten electrode tungsten inclusion from causing property of welded joint to worsen.
By the setting parameter to preposition argon arc welding, Laser Welding and rearmounted argon arc welding, the quality of welding product can be further ensured.
Accompanying drawing explanation
Fig. 1 is the flow chart of hollow piston lever of reducer laser non-melt pole twin arc composite welding process.
Fig. 2 a is single laser weld joint aspect graph.
Fig. 2 b is laser non-melt pole twin arc composite welding head aspect graph.
Fig. 3 a is laser non-melt pole twin arc composite welding hollow piston lever of reducer tensile property curve.
Fig. 3 b is laser non-melt pole twin arc composite welding hollow piston lever of reducer tensile property curve.
Detailed description of the invention
The concrete data of the hollow piston lever of reducer of certain money are as shown in table 1, and material is 20Mn2(cold-drawn state), welding process is as follows.
Table 1 hollow piston rod size
(1) by hollow for Φ 18 piston lever of reducer and two ends solid plug clamping on special fixture, and ensure concentricity;
(2) front preheating process arc current 50A-150A; Defocusing amount-the 1mm of laser beam; Rearmounted welding arc electric current 100A; Laser head and rearmounted welding gun angle 40 °; Laser head and rearmounted welding-torch horizontal distance 10mm; Rotary speed 0.1m/s during hollow piston rod welding job; Protective atmosphere Ar flow 15 m--
3/ min.
(3) after clamping workpiece completes, first front preheating process electric arc arrives the weld metal zone of workpiece and striking deposite metal, laser compound welding joint puts in place simultaneously, after within 1 second, waiting for, carries out penetration fustion welding melting weld metal zone while of laser and preposition, rearmounted electric arc.
(4), after workpiece revolves and turns around, for ensureing welding performance, the amount of lap of 3mm is required; Before welding terminates, first laser quit work, and then preposition argon-arc welding gun quits work, and rearmounted arc current adopts the technique fading to 0A to ensure the defects such as postwelding anury hole, and ensures that weld seam is evenly apparent, attractive in appearance, now completes welding process.
After welding terminates, laser welding process and laser twin arc composite welding process are analyzed.Be weld metal zone pattern under two kinds of process conditions as Fig. 2 a and 2b shows.From Fig. 2 (a), there is the problems such as fusion penetration is limited and affect its joint performance in pure laser welding point; And Fig. 2 (b) is laser-twin arc composite welding joint pattern, visible weld metal zone realizes complete penetration, and weld metal zone and matrix seamlessly transit, and thermal stress is less, without protrusion of surface, and basic newly net forming.Concrete fusion penetration and depth-to-width ratio Data Comparison as shown in table 2, wherein H is fusion penetration, and W represents weld pool width, depth-to-width ratio and fusion penetration and molten wide ratio.
Table 2 weld metal zone fusion penetration and depth-to-width ratio Data Comparison.
As best shown in figures 3 a and 3b, tensile strength and percentage elongation contrast as shown in table 3 in hollow piston lever of reducer stress strain curve contrast.Visible, after adopting welding method of the present invention, tensile strength and percentage elongation increase.
Table 3 tensile property Data Comparison
| 0.2% ratio yield strength (MPa) | Tensile strength (MPa) | Percentage elongation (%) | |
| a | 178.7 | 725.9 | 9.0 |
| b | 187.4 | 816.2 | 11.2 |
Claims (5)
1. a hollow piston lever of reducer laser non-melt pole twin arc composite welding process, is characterized in that comprising the following steps:
1) by the solid stifled clamping of hollow piston lever of reducer and two ends on fixture, and ensure concentricity;
2) set gradually preposition argon-arc welding gun, the laser head of Laser Welding and rearmounted argon-arc welding gun at hollow piston lever of reducer and solid stifled to-be-welded region, fill protective atmosphere;
3) preposition argon-arc welding gun is started, preposition electric arc is utilized to carry out preheating to to-be-welded region, after within 1 ~ 2 second, waiting for, striking deposite metal above the weld metal zone of workpiece, laser head and rearmounted argon-arc welding gun start work simultaneously, and namely Laser Welding and twin arc carry out penetration fustion welding melting weld metal zone simultaneously;
4) utilize frock to be rotated a circle by part to be welded, rotation speed change scope is 0.07m/s ~ 0.3m/s, welding end with weld starting point and have the amount of lap of 0.5 ~ 3mm;
5) after welding terminates, first laser head quits work, and then preposition argon-arc welding gun quits work, and the arc current employing of last rearmounted argon-arc welding gun fades to 0A and terminates welding.
2. hollow piston lever of reducer laser non-melt pole twin arc composite welding process as claimed in claim 1, it is characterized in that: in described step 2, protective atmosphere is argon gas, change in flow scope is 10 ~ 20m--
3/ min.
3. hollow piston lever of reducer laser non-melt pole twin arc composite welding process as claimed in claim 1, it is characterized in that: the process conditions of described step 3 needs are the curent change scope of preposition argon-arc welding gun is direct current 50A ~ 150A, the curent change scope of rearmounted argon-arc welding gun is direct current 50A ~ 150A, and laser power is 500W ~ 1500W.
4. hollow piston lever of reducer laser non-melt pole twin arc composite welding process as claimed in claim 1, it is characterized in that: in described step 3, preposition argon-arc welding gun head and hollow piston lever of reducer weld metal zone distance are 3 ~ 7mm, with weld metal zone vertical direction angle 30 °, laser head and rearmounted argon-arc welding gun distance are 5 ~ 10cm, both variable angle scopes 10 ~ 45 °.
5. hollow piston lever of reducer laser non-melt pole twin arc composite welding process as claimed in claim 1, it is characterized in that: the wall thickness range of described hollow piston lever of reducer is 1 ~ 10mm, and material is the aluminum alloy materials of ferrous materials or high-intensity high-tenacity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410327329.9A CN104096973B (en) | 2014-07-10 | 2014-07-10 | Hollow piston lever of reducer laser non-melt pole twin arc composite welding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410327329.9A CN104096973B (en) | 2014-07-10 | 2014-07-10 | Hollow piston lever of reducer laser non-melt pole twin arc composite welding process |
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| CN104096973A CN104096973A (en) | 2014-10-15 |
| CN104096973B true CN104096973B (en) | 2015-11-04 |
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| CN106862772B (en) * | 2017-04-14 | 2019-03-05 | 温州大学 | Damper automatic welding device and method |
| CN112496544A (en) * | 2020-09-30 | 2021-03-16 | 上海交通大学 | Efficient welding method and device for thin-wall welding titanium tube by arc-assisted laser |
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|---|---|---|---|---|
| CN102069305A (en) * | 2011-02-11 | 2011-05-25 | 天津大学 | Laser twin-electric arc compound welding system |
| CN102791420A (en) * | 2010-03-08 | 2012-11-21 | 株式会社神户制钢所 | Laser/arc hybrid welding method and method of producing welded member using same |
| CN103464908A (en) * | 2013-08-29 | 2013-12-25 | 张家港市恒运新材料科技有限公司 | Protecting method of laser-arc hybrid welding |
| CN103862177A (en) * | 2014-03-13 | 2014-06-18 | 机械科学研究院哈尔滨焊接研究所 | Laser-GMA (gas metal arc) hybrid heat source filler wire welding method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002035968A (en) * | 2000-07-31 | 2002-02-05 | Toshiba Corp | Composite welding process |
| JP2003001453A (en) * | 2001-06-20 | 2003-01-08 | Kawasaki Heavy Ind Ltd | Combined heat source welding method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791420A (en) * | 2010-03-08 | 2012-11-21 | 株式会社神户制钢所 | Laser/arc hybrid welding method and method of producing welded member using same |
| CN102069305A (en) * | 2011-02-11 | 2011-05-25 | 天津大学 | Laser twin-electric arc compound welding system |
| CN103464908A (en) * | 2013-08-29 | 2013-12-25 | 张家港市恒运新材料科技有限公司 | Protecting method of laser-arc hybrid welding |
| CN103862177A (en) * | 2014-03-13 | 2014-06-18 | 机械科学研究院哈尔滨焊接研究所 | Laser-GMA (gas metal arc) hybrid heat source filler wire welding method |
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