CN109014485A - A method of improving aluminium alloy CMT plumb joint fusion penetration and stomata - Google Patents
A method of improving aluminium alloy CMT plumb joint fusion penetration and stomata Download PDFInfo
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- CN109014485A CN109014485A CN201710439463.1A CN201710439463A CN109014485A CN 109014485 A CN109014485 A CN 109014485A CN 201710439463 A CN201710439463 A CN 201710439463A CN 109014485 A CN109014485 A CN 109014485A
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- aluminium alloy
- stomata
- ultrasonic impact
- fusion penetration
- ultrasonic
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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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0646—Solder baths
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention discloses a kind of method for improving aluminium alloy CMT plumb joint fusion penetration and stomata, and in aluminium alloy CMT welding process, the position of ultrasonic impact device impact aluminium sheet immobilizes, and welds overall process with ultrasonic vibration.Welding process, since striker pin periodically hits aluminium sheet, ultrasonic vibration, which is equivalent to, applies an alternation external force to liquid state molten pool, has stirring action in liquid metal, promotes liquid metal flows in molten bath, fusion penetration is caused to increase.Meanwhile ultrasonic vibration promotes the floating of bubble, shortens time of the bubble in molten bath, facilitates the evolution of bubble, to reduce the stomata quantity of connector.
Description
Technical field
The invention belongs to CMT welding technology fields, more particularly, relate to the use of ultrasonic impact and pass through ultrasonic vibration
Method improves the gentle hole number of aluminium alloy CMT plumb joint fusion penetration.
Background technique
Cold metal transfer technology (Cold Metal Transfer, CMT) is that Austrian Fu Nisi company welds in steel and aluminium
It connects, the welding technique without a kind of low_input_power amount developed on splashing arc stricking techniques and micro-force sensing technical foundation.CMT technology
Innovation be by the droplet transfer in conjunction with wire feed process, to reduce the heat input of welding process, really realize
It is welded without splashing.Since CMT welding process heat input is low, cause CMT plumb joint fusion penetration shallow, welding thin plate is only capable of, using model
It encloses limited.Meanwhile there are a large amount of stomatas in aluminium alloy CMT plumb joint, reduce the mechanical property of connector.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of improvement aluminium alloy CMT plumb joint fusion penetration and
The method of stomata quantity, it is effective to improve the gentle hole number of joint penetration.
Technical purpose of the invention is achieved by following technical proposals:
A method of improving aluminium alloy CMT plumb joint fusion penetration and stomata, in aluminium alloy CMT welding process, using super
Acoustic shock device impacts aluminium alloy plate to be welded, so that with ultrasonic impact in welding overall process, in the welding process, welding
Overall process is with ultrasonic vibration.Welding process, since ultrasonic impact needle periodically hits aluminium alloy plate, ultrasonic vibration be equivalent to
Liquid state molten pool applies an alternation external force, has stirring action in liquid metal, promotes liquid metal flows in molten bath, causes
Fusion penetration increases.Meanwhile ultrasonic vibration promotes the floating of bubble, shortens time of the bubble in molten bath, facilitates bubble
Evolution, to reduce the stomata quantity of connector.
When carrying out ultrasonic impact, the frequency of ultrasonic impact is 15-20kHz.
When carrying out ultrasonic impact, aluminium alloy and ultrasonic impact device location to be welded is selected to immobilize, i.e., it is ultrasonic
The striker pin of impact device and aluminium alloy contact position are constant, and welding gun is walked, and striker pin is with the shortest distance of welding gun
80—100mm。
Technical solution of the present invention uses ultrasonic impact equipment, in welding overall process with ultrasonic vibration, promotes liquid in molten bath
State metal flow and bubble floating cause fusion penetration to increase and decrease stomata quantity.
Detailed description of the invention
Fig. 1 is that ultrasonic vibration aluminium alloy CMT welds schematic diagram in the present invention.
Fig. 2 is ultrasonic vibration and non-ultrasonic vibration aluminium alloy CMT plumb joint cross section in the present invention.
Fig. 3 is the hardness of ultrasonic vibration and non-ultrasonic vibration aluminium alloy CMT welded seam in the present invention.
Specific embodiment
Technical solution of the present invention is further illustrated combined with specific embodiments below:
Fig. 1 is ultrasonic vibration aluminium alloy CMT welding process schematic diagram.As shown in Figure 1, striker pin is rushed in welding process
It hits position to remain unchanged, the shortest distance of striker pin and welding gun is 80mm.Test base material of the present invention is aluminium alloy 6061,
Specimen size is 300 × 150 × 4mm, and welding wire selects ER4043.Using direct current cold metal transfer technology CMT to the aluminium of 4mm plate thickness
Alloy carries out disk diffusion method test.Testing equipment selects 4000 type of CMT Advanced that CMT welding machine is Fu Nisi company to weld
Machine, ultrasonic impact select the ultrasonic impact machine of Tianjin Tian Dong perseverance development in science and technology Co., Ltd production.
It mainly realizes that steps are as follows:
1. being removed the oxidation film on aluminium sheet with wire brush before overlay welding experiment, until exposing metallic luster, will be applied with alcohol
Respectively the greasy dirt within the scope of about 30-40mm and foul clean up on surface at weldering, after aoxidizing membrane removal, should the welding in 2h, in order to avoid
Regenerate new oxidation film；
2. setting welding parameter, wire feed rate 5m/min, the ultrasonic speed of travel and the welding gun totality speed of travel are
30cm/min, frequency are adjusted to 20kHz, gas flow 20L/min；
3. sample to be welded is fixed with fixture；Open ultrasonic impact machine switch, frequency 20kHz stablize it is constant, after 5 seconds, surpass
Set constant, welding gun walking in acoustic shock seat in the plane；
4. after built-up welding, closing ultrasonic impact switch.
5. passing through wire cutting by ultrasonic vibration aluminium alloy CMT plumb joint and without ultrasonic vibration aluminium alloy CMT plumb joint
It is cut, after sanding and polishing, watches joint penetration and stomata under an optical microscope.By Fig. 2 it can be found that with not
The joint penetration of ultrasonic vibration compares, the joint penetration by ultrasonic vibration be improved significantly.Ultrasonic vibration posterior spiracle number
Amount reduces, and volume reduces.The micro-vickers hardness for measuring axis of a weld using the Vickers of model MH-3 simultaneously, from
Face of weld starts to measure, and every 0.3mm measures a point, pressure 200g, pressure maintaining 15s, and ultrasonic vibration improves the hardness of weld seam,
Such as Fig. 3, after ultrasonic vibration, the hardness of weld seam is obviously increased.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (7)
1. a kind of method for improving aluminium alloy CMT plumb joint fusion penetration and stomata, which is characterized in that in aluminium alloy CMT welding process
In, aluminium alloy plate to be welded is impacted using ultrasonic impact device, so as to weld in welding overall process with ultrasonic impact
Cheng Zhong welds overall process with ultrasonic vibration；Welding process, since ultrasonic impact needle periodically hits aluminium alloy plate, ultrasound vibration
Dynamic be equivalent to applies an alternation external force to liquid state molten pool, has stirring action in liquid metal, promotes liquid gold in molten bath
Belong to flowing, fusion penetration is caused to increase；Meanwhile ultrasonic vibration promotes the floating of bubble, shortens time of the bubble in molten bath, has
Help the evolution of bubble, to reduce the stomata quantity of connector.
2. a kind of method for improving aluminium alloy CMT plumb joint fusion penetration and stomata according to claim 1, which is characterized in that
When carrying out ultrasonic impact, the frequency of ultrasonic impact is 15-20kHz.
3. a kind of method for improving aluminium alloy CMT plumb joint fusion penetration and stomata according to claim 1 or 2, feature
It is, selects aluminium alloy and ultrasonic impact device location to be welded to immobilize, i.e. the striker pin and aluminium of ultrasonic impact equipment
Alloy contact position is constant, and welding gun is walked, and striker pin and the shortest distance of welding gun are 80-100mm.
4. ultrasonic impact is improving the application in aluminium alloy CMT plumb joint fusion penetration and stomata, which is characterized in that in welding process
In, overall process is welded with ultrasonic vibration；Welding process, since ultrasonic impact needle periodically hits aluminium alloy plate, ultrasonic vibration
It is equivalent to and applies an alternation external force to liquid state molten pool, there is stirring action in liquid metal, promote liquid metal in molten bath
Flowing, causes fusion penetration to increase；Meanwhile ultrasonic vibration promotes the floating of bubble, shortens time of the bubble in molten bath, helps
In the evolution of bubble, to reduce the stomata quantity of connector.
5. ultrasonic impact according to claim 4 is improving the application in aluminium alloy CMT plumb joint fusion penetration and stomata, special
Sign is, when carrying out ultrasonic impact, the frequency of ultrasonic impact is 15-20kHz.
6. ultrasonic impact according to claim 4 is improving the application in aluminium alloy CMT plumb joint fusion penetration and stomata, special
Sign is, aluminium alloy and ultrasonic impact device location to be welded is selected to immobilize, i.e., the striker pin of ultrasonic impact equipment with
Aluminium alloy contact position is constant, and welding gun is walked, and striker pin and the shortest distance of welding gun are 80-100mm.
7. ultrasonic impact according to claim 4 is improving the application in aluminium alloy CMT plumb joint fusion penetration and stomata, special
Sign is that aluminium alloy is aluminium alloy 6061.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439463.1A CN109014485A (en) | 2017-06-12 | 2017-06-12 | A method of improving aluminium alloy CMT plumb joint fusion penetration and stomata |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710439463.1A CN109014485A (en) | 2017-06-12 | 2017-06-12 | A method of improving aluminium alloy CMT plumb joint fusion penetration and stomata |
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| CN109014485A true CN109014485A (en) | 2018-12-18 |
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Citations (6)
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| KR20090062599A (en) * | 2007-12-13 | 2009-06-17 | 주식회사 포스코 | Fe-al different metals welding appartus and welding method using ultrarsonic vibration |
| CN103586571A (en) * | 2013-11-25 | 2014-02-19 | 国家电网公司 | Device and method for improving quality of aluminum alloy plasma arc welded joint |
| CN104741805A (en) * | 2015-03-18 | 2015-07-01 | 哈尔滨工业大学 | Aluminum alloy pulse ultrasound and electric arc composite welding device and method |
| CN104785926A (en) * | 2015-04-14 | 2015-07-22 | 西南交通大学 | Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology |
| CN105710537A (en) * | 2016-05-05 | 2016-06-29 | 北京隆源自动成型系统有限公司 | Ultrasonic assistec laser electric arc composite welding method of aluminum alloy |
| CN105880852A (en) * | 2016-05-28 | 2016-08-24 | 长春理工大学 | Ultrasonically assisted pulse laser-MIG composite heat source welding device and welding method thereof |
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2017
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090062599A (en) * | 2007-12-13 | 2009-06-17 | 주식회사 포스코 | Fe-al different metals welding appartus and welding method using ultrarsonic vibration |
| CN103586571A (en) * | 2013-11-25 | 2014-02-19 | 国家电网公司 | Device and method for improving quality of aluminum alloy plasma arc welded joint |
| CN104741805A (en) * | 2015-03-18 | 2015-07-01 | 哈尔滨工业大学 | Aluminum alloy pulse ultrasound and electric arc composite welding device and method |
| CN104785926A (en) * | 2015-04-14 | 2015-07-22 | 西南交通大学 | Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology |
| CN105710537A (en) * | 2016-05-05 | 2016-06-29 | 北京隆源自动成型系统有限公司 | Ultrasonic assistec laser electric arc composite welding method of aluminum alloy |
| CN105880852A (en) * | 2016-05-28 | 2016-08-24 | 长春理工大学 | Ultrasonically assisted pulse laser-MIG composite heat source welding device and welding method thereof |
Non-Patent Citations (1)
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| 刘强 等: ""送丝速度对6061铝合金CMT焊接接头性能的影响"", 《热加工工艺》 * |
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Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |