CN103203510B - Brazing experimental device and method assisted by supersonic vibration and electric fields - Google Patents
Brazing experimental device and method assisted by supersonic vibration and electric fields Download PDFInfo
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- CN103203510B CN103203510B CN201310085597.XA CN201310085597A CN103203510B CN 103203510 B CN103203510 B CN 103203510B CN 201310085597 A CN201310085597 A CN 201310085597A CN 103203510 B CN103203510 B CN 103203510B
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Abstract
The invention relates to a brazing experimental device and method assisted by supersonic vibration and electric fields. The brazing experimental device assisted by supersonic vibration and electric fields includes a heating system, a static electric field applying system and an ultrasonic wave load applying system; the static electric field applying system includes an static electric field power supply, an upper electrode plate, a lower electrode plate, and the upper surface of the lower electrode is provided with an insulation brazing working platform; the ultrasonic wave load applying system includes an ultrasonic wave generating system and an ultrasonic vibration transmission system; the ultrasonic wave generating system includes an ultrasonic wave generating power supply and a piezoelectric ceramic transducer; and the ultrasonic vibration transmission system includes a support, an ultrasonic wave transmission bar and a vibration pressure head, and the portion of the ultrasonic wave transmission bar, which extends between the upper electrode plate and the lower electrode plate, and the vibration pressure head are both made of insulating ceramics. The brazing experimental device enables experimental materials to be subjected to brazing experiments with the combined assist of the ultrasonic wave loads and the static electric field, and overcomes the limit of only applying the ultrasonic vibration or only applying the static electric field in improving the quality of brazing welding points.
Description
Technical field
The present invention relates to brazing tests technical field, particularly the brazing tests device and method of a kind of ultrasonic vibration and electric field-assisted.
Background technology
In electronic product, solder joint plays the important function of connecting circuit element and substrate.Along with electronic product developing rapidly to high power, high density, high reliability and multifunction and the direction such as lead free manufacture, encapsulation, the q&r of Lead-Free Solder Joint is had higher requirement.In brazing process; with soak, spread, the closely-related fabrication weldability such as to solidify poor; the weld defect such as such as rosin joint, the thick and intermetallic compound of interface roughness (IMC) layer cracking, weld seam microsegregation, fillet lifting and pad often can be caused to peel off, has a strong impact on quality of welding spot and reliability.Along with the process of the unleaded development of solder, this defect day is aobvious outstanding.In brazing process, wetability is the key factor affecting solder joint q&r.At present, in order to improve reliability and the quality of solder joint or joint, realize usually through the method improving solder wetting.The wetability of solder and liquid solder sprawling on mother metal surface, the mass transfer behavior of gas-liquid, solid-liquid interfacial tension and material interface is relevant.The wetability of lead-free brazing, generally lower than traditional SnPb solder, therefore, improves lead-free brazing soaking to obtain soldered fitting of good performance or solder joint mother metal often through measure such as employing deep-etching brazing flux and atmosphere protection etc. in prior art.But the soldering production cost under atmosphere protection is high, and brazing flux generally all has corrosivity, there is adverse effect in solder joint or joint under arms process.Under improving the prerequisite of solder wetting in realization, reach few object used, even do not use solder flux in brazing process, there is the method for welding that external energy is auxiliary in prior art, this method for welding can improve the wetability of solder simultaneously.This method for welding has following two kinds: one applies ultrasonic wave oscillating load to mother metal, and another kind applies electrostatic field at the soldering places of solder and mother metal.
The prior art of the method for welding using ultrasonic wave oscillating load to assist is a kind of ultrasonic wave Vibration Liquid Phase welding equipment as No. 200710071744.2 Chinese invention patents disclose, and this equipment comprises ultrasonic wave vibration charger and soldering heat source.The wetting joint filling process of ZnAl solder under frequency 20kHz, the effect of amplitude 10 μm of ultrasonic wave oscillating loads is have studied in above-mentioned patent document; Research shows, ultrasonic wave vibrates propagation in a liquid can produce cavitation, can abolish the oxide-film on mother metal surface whereby and promote liquid solder sprawling on mother metal surface.But the vibration of simple applying ultrasonic wave can make liquid solder produce in wet processes " subcutaneous undercurrent layer ", is unfavorable for that solder is fully wetting, solder wetting limitation.Under the effect of ultrasonic wave oscillating load, the large multipotency of wetability of solder improves, but improves limitation.
Prior art such as Xi'an University of Technology Lee mahatma, the Fan Zhikang of the method for welding using electrostatic field to assist have studied the electrostatic field impact wetting on Cu/W in the paper (thesis topic is " electric field and element Cr are on the impact of Cu/W wetability ") of " Rare Metals Materials and engineering " the 36th volume the 6th phase in 2007.The article disclose the method for carrying out solder wetting process under electrostatic field.Added electrostatic field can form contact potential and electric charge enrichment at liquid-solid boundary place, thus cause solid liquid interface to reduce, and electrostatic field can promote material interface mass transfer, is conducive to solder wetting, but the effect of single electrostatic field is also very limited to the improvement of solder wetting.
No matter the method for welding that above-mentioned external energy is auxiliary, be single applying ultrasonic wave oscillating load or single applying electrostatic field, all only can improve the wetability of solder in limited range, can not significantly improve the q&r of solder joint.In addition, singlely the shortcoming that brazing tests device that ultrasonic wave oscillating load assists exists heating environment uniform temperature difference is added; Singlely add the auxiliary brazing tests device of electrostatic field to there is electrostatic field power supply kind single, the shortcoming to the wetting sex experimental study in brazing process such as electrostatic field kind, polarity can not be carried out.All there is the drawback of brazing tests device secondary development difference in these two kinds of methods.
Summary of the invention
The object of the present invention is to provide a kind of brazing tests method of ultrasonic vibration and electric field-assisted, carry out under the common booster action of ultrasonic wave oscillating load and electrostatic field to make brazing process.Present invention also offers a kind of device being exclusively used in the brazing tests method implementing above-mentioned ultrasonic vibration and electric field-assisted.
To achieve these goals, the brazing tests method of ultrasonic vibration of the present invention and electric field-assisted adopts following technical scheme.A brazing tests method for ultrasonic vibration and electric field-assisted, comprises the following steps:
A) welds prepares:
A) preparation of experiment material: 1) process step-like bridging arrangement on the mother metal that soldering is used, with sand paper or equipment for grinding the welding surface of mother metal is polished flat, bright and clean, and to clean with acetone or alcohol, dry or dry up rear for subsequent use; 2) by solder produced as sheets; 3), between faying surface solder being placed in the upper and lower corresponding of the bridging arrangement of two mother metals, the bridging arrangement make-up of two pieces of mother metals is overlapped;
B) debugging of welding equipment: 1) by the alternating current of electrostatic field power supply, ultrasonic wave generation plant-grid connection 220V; 2) close ultrasonic wave generation power supply after the ultrasonic wave oscillation power needed for setting, open when experiment needs; 3) close electrostatic field power supply after setting up the electrostatic field kind of needs, polarity, voltage, open when experiment needs;
B) brazing process: experiment material is positioned on the insulation brazing work bench between the electric pole plate of electrostatic field application system and lower electrode plate, the ultrasonic wave transmission lever be connected with the ultrasonic vibration source of setpoint frequency is stretched in described electrostatic field, and by the vibration pressure head that ultrasonic wave transmission lever is fixedly connected with, ultrasonic wave load is applied to experiment material, design temperature is heated to the experiment material be in electrostatic field, make brazing filler metal melts, two mother metals that overlap joint is arranged are linked together.
The brazing tests method of ultrasonic vibration of the present invention and electric field-assisted also comprises after welding treatment step: after step B completes, and timely use discharging rod bleeds off on electric pole plate or lower electrode plate, the electrostatic of electrostatic field power output end; Open heating furnace door, take off vibration pressure head, take out experiment material.
The brazing tests method of ultrasonic vibration of the present invention and electric field-assisted can make experiment material ultrasonic wave oscillating load and electrostatic field common auxiliary under carry out brazing tests process, overcome single applying ultrasonic wave vibration or the limitation of single applying electrostatic field existing in the q&r improving solder joint in prior art and (oscillating load and electrostatic field acting in conjunction cannot be realized, it is single that to add ultrasonic vibration apparatus heating environment uniform temperature poor, it is single that to add static field device electrostatic field power supply kind single, and all there is the deficiencies such as experimental provision secondary development difference in both).The brazing tests method of ultrasonic vibration of the present invention and electric field-assisted has been expanded few use, has not even been studied with the soldering tech of brazing flux, both can be used for the brazing process of research experiment material under the compound action of ultrasonic wave oscillating load and electrostatic field, can be used for again developmental research soldering new technology, new technology.
Further, the brazing tests method of ultrasonic vibration of the present invention and electric field-assisted has after welding treatment step, uses discharging rod to bleed off the electrostatic of electric pole plate, lower electrode plate and electrostatic field power output end in time, improves the security performance of the method.
The brazing tests device of ultrasonic vibration of the present invention and electric field-assisted adopts following technical scheme: the brazing tests device of a kind of ultrasonic vibration and electric field-assisted, comprises the heating system for providing soldering thermal source for experiment material, for the electrostatic field application system to experiment material applying electrostatic field, for applying the ultrasonic wave load applying system of ultrasonic wave load to experiment material, described electrostatic field application system comprises electrostatic field power supply, the electric pole plate be connected with electrostatic field power electric and lower electrode plate, the upper surface of described lower electrode plate is provided with the insulation brazing work bench for placing experiment material, and the table top of insulation brazing work bench is the plane for placing experiment material, ultrasonic wave load applying system comprise ultrasonic wave generation systems that ultrasonic vibration source is provided and by ultrasonic wave vibration passing to the ultrasonic vibration transmission system of experiment material, described ultrasonic wave generation systems comprises ultrasonic wave generation power supply, the piezoelectric ceramic transducer be connected with ultrasonic wave generation power supply, ultrasonic vibration transmission system comprises support, to be connected or elastics wing connects for stretching into the ultrasonic wave transmission lever between described electric pole plate and lower electrode plate with hinged swing of support, be fixedly arranged on the vibration pressure head for compressing experiment material in ultrasonic wave transmission lever, described piezoelectric ceramic transducer is fixed in ultrasonic wave transmission lever, the described ultrasonic wave transmission lever part stretched between electric pole plate and lower electrode plate all adopts with vibration pressure head and can prevent from causing the insulating ceramics of shielding to make to electrostatic field.
Heating system comprises for providing the heating furnace of soldering thermal source, the thermocouple be located in heating furnace for experiment material, the temperature control instrument of the ambient temperature for monitor and forecast experiment material be connected with thermocouple be located at outside heating furnace, described electric pole plate and lower electrode plate are arranged in heating furnace, described ultrasonic wave transmission lever one end is stretched out outside heating furnace, and described ultrasonic wave generation power supply is located at outside heating furnace.
Also comprise experiment porch, described electric pole plate and lower electrode plate are placed on experiment porch respectively by dielectric support, the insulator supporting electric pole plate is insulated column, the insulator supporting lower electrode plate is insulation board, described insulation brazing work bench, insulation board are made by the silicon nitride ceramics with high strength, and insulation brazing work bench and insulation board are disc.
Spacing between electric pole plate and lower electrode plate is not less than 3cm, and the electrostatic field intensity scope between electric pole plate and lower electrode plate is 0 ~ 6.6 kV/cm.
Assembling pressurization counterweight in described ultrasonic wave transmission lever.
Described electrostatic field power supply is the electrostatic field power supply that can provide the positive direct-current high pressure of 0 ~ 20kV, negative dc high voltage, ac high-voltage and high voltage pulse, electrostatic field power supply has positive direct-current high-voltage output end, negative dc high voltage output, ac high-voltage output, positive direct-current high voltage pulse output and earth terminal, and any two in the positive direct-current high-voltage output end of electrostatic field power supply, negative dc high voltage output, ac high-voltage output, positive direct-current high voltage pulse output and earth terminal are connected with the contact conductor of lower electrode plate with electric pole plate respectively.
Described ultrasonic wave generation systems also comprises the amplitude transformer for amplifying amplitude, described piezoelectric ceramic transducer and amplitude transformer Connecting groups synthesize assembly and are together fixed in ultrasonic wave transmission lever, and described ultrasonic wave generation power supply has the oscillation power of 0 ~ 300W and the vibration frequency of 20 ~ 40kHz.
Described support comprises sliding rail and with the described ultrasonic wave transmission lever hinged sliding sleeve of guiding slidable fit on sliding rail of above-below direction guiding, the amplitude transformer of described ultrasonic wave generation systems is screwed the top of the close support one end in ultrasonic wave transmission lever, and amplitude transformer direction of vibration is vertical with the length bearing of trend of ultrasonic wave transmission lever.
Adopt the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted can make experiment material ultrasonic wave oscillating load and electrostatic field common auxiliary under carry out brazing tests process, overcome single applying ultrasonic wave vibration or the limitation of single applying electrostatic field existing in the q&r improving solder joint in prior art and (oscillating load and electrostatic field acting in conjunction cannot be realized, it is single that to add ultrasonic vibration apparatus heating environment uniform temperature poor, it is single that to add static field device electrostatic field power supply kind single, and all there is the deficiencies such as experimental provision secondary development difference in both).Ultrasonic wave transmission lever stretches into the part between electric pole plate and lower electrode plate and vibrates pressure head and all adopts insulating ceramics to make, and can prevent from causing shielding to electrostatic field.The brazing device of ultrasonic vibration of the present invention and electric field-assisted has feature multiple functional, safe and reliable, easy to use.The brazing tests device of ultrasonic vibration of the present invention and electric field-assisted has been expanded few use, has not even been studied with the soldering tech of brazing flux, both can be used for the brazing process of research experiment material under the compound action of ultrasonic wave oscillating load and electrostatic field, can be used for again developmental research soldering new technology, new technology.
Further, heating system comprises heating furnace, thermocouple and temperature controller, can facilitate the ambient temperature of monitor and forecast experiment material.
Further, the spacing between electric pole plate and lower electrode plate is not less than 3cm, can make the electrostatic field intensity in experimentation evenly, change little.
Further, electrostatic field power supply has positive direct-current high-voltage output end, negative dc high voltage output, ac high-voltage output, positive direct-current high voltage pulse output and earth terminal, can make to produce dissimilar electrostatic field between electric pole plate and lower electrode plate.
Accompanying drawing explanation
Fig. 1 is the using state figure of a kind of embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted;
Fig. 2 is the structural representation of ultrasonic wave load applying system in Fig. 1;
Fig. 3 is the structural representation of electrostatic field application system in Fig. 1;
Fig. 4 is the structural representation of heating system in Fig. 1;
Fig. 5 is the structural representation of experiment material in Fig. 1;
Fig. 6 is the structural representation of mother metal in Fig. 5.
Detailed description of the invention
A kind of embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, as shown in figs. 1 to 6: this device comprise for experiment material 2 is provided the heating system of soldering thermal source, for experiment material 2 is applied electrostatic field electrostatic field application system, for applying the ultrasonic wave load applying system of ultrasonic wave oscillating load to experiment material 2.
Experiment material 2 comprises the solder 202 had between two mother metals 201 of bridging arrangement and the faying surface being placed in two mother metals 201, in the present embodiment, mother metal 201 is for having the Cu plate of the bridging arrangement of step tabular, solder 202 is flake, and solder is placed between the faying surface of the upper and lower corresponding of the bridging arrangement of two mother metals.
Heating system comprise have cuboid-type inner chamber for providing the heating furnace 20 of soldering thermal source, the thermocouple 21 be placed in heating furnace 20 to experiment material 2, being located at the temperature control instrument 22 of the ambient temperature for monitor and forecast experiment material 2 that is outside heating furnace 20 and thermocouple 21 control connection.Heating furnace 20 adopts 220V AC-powered, and by the control of temperature control instrument 22, the operating temperature range of heating furnace 20 is room temperature to 1000 DEG C.Experiment porch 3 is also provided with in heating furnace 20.
The electric pole plate 30 that electrostatic field application system comprises electrostatic field power supply 38, the relative spacing up and down that is electrically connected with electrostatic field power supply 38 is arranged and lower electrode plate 31.Spacing in the present embodiment between electric pole plate 30 and lower electrode plate 31 is 4cm.Electric pole plate 30 and lower electrode plate 31 are arranged on experiment porch 3 respectively by dielectric support, the upper surface of lower electrode plate 31 is provided with the insulation brazing work bench 33 for placing experiment material 2, and the table top of insulation brazing work bench 33 is the planes for placing experiment material 2.Electric pole plate 30 and lower electrode plate 31 are all welded with the binding post 35 be made up of heat resisting steel, binding post 35 is connected with contact conductor 36, and contact conductor 36 one end is connected on binding post 35 by fastening nuts, the other end is connected with the electrostatic field power supply 38 being located at electrothermal furnace outside.On contact conductor 36, cover has the insulating sleeve 37 for contact conductor 36 and heating furnace 20 being insulated.The wire of thermocouple 21 and contact conductor 36, minimum range between electric pole plate 30 and lower electrode plate 31 are all not less than 3cm.In the present embodiment, it is dull and stereotyped that electric pole plate and lower electrode plate 31 are the circle adopting the U.S.'s trade mark 304 stainless steel to make, and the diameter of electric pole plate 30 is greater than lower electrode plate 31 diameter, the insulator supporting electric pole plate 30 is specially insulated column 32, support the insulated column 32 of electric pole plate 30 and have three and circumferencial direction along electric pole plate 30 is uniformly distributed, the insulator supporting lower electrode plate 31 is specially insulation board 34, insulation brazing work bench 33, insulation board 34 is made by the silicon nitride ceramics with high strength, insulation brazing work bench 33 and insulation board 34 are disc.Insulated column 32 is made up of high voltage withstanding non-conductive ceramic, adopts silicon nitride ceramics to make in the present embodiment.Insulating sleeve 37 is made up of high temperature resistant, high voltage withstanding ceramic material, adopts quartz glass to make in the present embodiment.Contact conductor 36 is made with heating resisting metal, and in the present embodiment, contact conductor 36 is Nickel-Silicom thermocouple silks of diameter 1.2mm.Residing for experiment material 2, the electrostatic field intensity of environment is 2.5kV/cm.Electrostatic field power supply 38 can provide the positive direct-current high pressure of 0 ~ 20kV, negative dc high voltage, ac high-voltage and high voltage pulse, has positive direct-current high-voltage output end, negative dc high voltage output, ac high-voltage output, positive direct-current high voltage pulse output and earth terminal.Any two in the positive direct-current high-voltage output end of electrostatic field power supply 38, negative dc high voltage output, ac high-voltage output, positive direct-current high voltage pulse output and earth terminal are connected with the contact conductor 36 of lower electrode plate 31 with electric pole plate 30 respectively.In the present embodiment, electric pole plate 30 connects negative high voltage output, and lower electrode plate 31 connects earth terminal, and the voltage of electrostatic field power supply 38 selects 10kV.
Ultrasonic wave load applying system comprise ultrasonic wave generation systems 1 that ultrasonic vibration source is provided and by ultrasonic wave vibration passing to the ultrasonic vibration transmission system 5 of experiment material 2.Ultrasonic wave generation systems 1 comprises ultrasonic wave generation power supply 40, the piezoelectric ceramic transducer be electrically connected with ultrasonic wave generation power supply 40, the amplitude transformer combining and form assembly 41 is connected with piezoelectric ceramic transducer, piezoelectric ceramic transducer and amplitude transformer are combined during fabrication and form assembly 41, ultrasonic vibration transmission system 5 comprises support, one end and support swing up and down the hinged and other end and are arranged in ultrasonic wave transmission lever 50 between electric pole plate 30 and lower electrode plate 31, be fixedly arranged on ultrasonic wave transmission lever 50 and be arranged in one end vibration pressure head 51 for compressing experiment material 2 down between electric pole plate 30 and lower electrode plate 31.Support comprises sliding rail 53 and with the ultrasonic wave transmission lever 50 hinged sliding sleeve 52 of slidable fit on sliding rail 53 of above-below direction guiding.Ultrasonic wave generation systems 1 combines by piezoelectric ceramic transducer and amplitude transformer the top that the assembly 41 formed is screwed the close support one end in ultrasonic wave transmission lever 50, and amplitude transformer direction of vibration is vertical with the length bearing of trend of ultrasonic wave transmission lever 50.Ultrasonic wave transmission lever 50 is equipped with counterweight 55 of pressurizeing between assembly 41 and vibration pressure head 51, and pressurization counterweight 55 is counterweight.Sliding rail 53 is fixedly arranged on by welding on the base 54 that extends in the horizontal direction.Amplitude transformer is taper amplitude transformer, amplitude transformer is made up of TC4 titanium alloy, the transform electrical signals that ultrasonic wave generation power supply 40 provides is ultrasonic vibratory energy form by wire by piezoelectric ceramic transducer, and amplitude transformer can play the effect of the Amplitude amplification 2 times provided by ultrasonic wave generation power supply 40.Vibration pressure head 51 is fixedly connected with ultrasonic wave transmission lever 50 by high-temp glue.The a part of TC4 titanium alloy of ultrasonic wave transmission lever 50 is made.Ultrasonic wave transmission lever 50 stretches into part between electric pole plate 30 and lower electrode plate 31 and vibrates pressure head 51 and all adopts and can prevent from causing the insulating ceramics of shielding to make to electrostatic field.In the present embodiment, the part that ultrasonic wave transmission lever 50 stretches between electric pole plate 30 and lower electrode plate 31 is made up of silicon carbide ceramics, and vibration pressure head 51 is made with silicon nitride ceramics.Ultrasonic wave vibration is passed to experiment material 2 from ultrasonic wave generation power supply 40 by ultrasonic wave transmission lever 50, and the ultrasonic wave oscillation power 0 ~ 300W of generation, vibration frequency is 20 ~ 40kHz.
In addition, also comprise for the rear discharging rod bleeding off the electrostatic of electric pole plate, lower electrode plate and electrostatic field power output end in time that worked in other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, discharging rod is made up of high voltage withstanding large resistance and wire, earth terminal, the other end and the contact conductor contact discharge of one termination electrostatic field power supply during use.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, electrostatic field power supply can also select the different connections of other voltage range and each output of electrostatic field power supply and corresponding electric pole plate and lower electrode plate.Such as: electric pole plate, lower electrode plate connect negative dc high voltage output, positive direct-current high-voltage output end respectively, output voltage range is 0 ~ 20kV; Or electric pole plate, lower electrode plate connect earth terminal, positive direct-current high-voltage output end respectively, output voltage range is 0 ~ 10kV; Or electric pole plate, lower electrode plate connect positive direct-current high-voltage output end, negative dc high voltage output respectively, output voltage is 0 ~ 20kV; Or electric pole plate, lower electrode plate connect positive direct-current high voltage pulse output, negative dc high voltage output respectively, output voltage is 0 ~ 20kV; Or electric pole plate, lower electrode plate connect earth terminal, negative dc high voltage output respectively, output voltage is 0 ~ 10kV; Or electric pole plate, lower electrode plate connect earth terminal, ac high-voltage output respectively, output voltage is 0 ~ 10kV; Or electric pole plate, lower electrode plate connect negative dc high voltage output, positive direct-current high voltage pulse output respectively, and output voltage is 0 ~ 20kV; Or electric pole plate, lower electrode plate connect earth terminal, positive direct-current high voltage pulse output respectively, and output voltage is 0 ~ 10kV; Or electric pole plate, lower electrode plate connect positive direct-current high-voltage output end, earth terminal respectively, output voltage is 0 ~ 10kV; Or electric pole plate, lower electrode plate connect ac high-voltage output, earth terminal respectively, output voltage is 0 ~ 10kV; Or electric pole plate, lower electrode plate connect positive direct-current high voltage pulse output, earth terminal respectively, output voltage is 0 ~ 10kV.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, the spacing between electric pole plate and lower electrode plate can be 3 ~ 6cm.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, other thermal source can also be adopted in heating system, as high-frequency induction heating, specifically by coil heats.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, environment electrostatic field intensity residing for experiment material can be 0 ~ 6.6kV/cm.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, when only using piezoelectric ceramic transducer just can meet the demands, ultrasonic wave load applying system also can be saved amplitude transformer and only comprise ultrasonic wave generation power supply and piezoelectric ceramic transducer.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, contact conductor can also be made with Pt-Rh wire.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, insulating sleeve can also be made with aluminium oxide ceramics.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, insulated column can also be made with quartz glass or aluminium oxide ceramics.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, insulation brazing work bench and insulation board can adopt aluminium oxide ceramics to make.
In other embodiment of the brazing tests device of ultrasonic vibration of the present invention and electric field-assisted, contact conductor one end can also directly be tightened on binding post, or one end of contact conductor is directly set with and is tightened on electric pole plate and lower electrode plate.
A kind of embodiment of the brazing tests method of ultrasonic vibration of the present invention and electric field-assisted uses the embodiment of the brazing tests device of above-mentioned ultrasonic vibration and electric field-assisted to carry out, and the method comprises the following steps:
A) welds prepares:
A) preparation of experiment material: 1) process step-like bridging arrangement on the mother metal that soldering is used, with sand paper or equipment for grinding the welding surface of mother metal is polished flat, bright and clean, and to clean with acetone or alcohol, dry or dry up rear for subsequent use; 2) by solder produced as sheets; 3), between faying surface solder being placed in the upper and lower corresponding of the bridging arrangement of two mother metals, the bridging arrangement make-up of two pieces of mother metals is overlapped;
B) debugging of welding equipment: 1) by electrostatic field power supply, ultrasonic wave generation plant-grid connection 220V alternating current; 2) close ultrasonic wave generation power supply after the ultrasonic wave oscillation power needed for setting, open when experiment needs; 3) close electrostatic field power supply after setting up the electrostatic field kind of needs, polarity, voltage, open when experiment needs.
B) brazing process: between electric pole plate experiment material being positioned over electrostatic field application system and lower electrode plate, the ultrasonic wave transmission lever be connected with the ultrasonic vibration source of setpoint frequency is stretched in electrostatic field, and by the vibration pressure head that ultrasonic wave transmission lever is fixedly connected with, ultrasonic wave load is applied to experiment material, design temperature is heated to the experiment material be in electrostatic field, make brazing filler metal melts, two mother metals that overlap joint is arranged are linked together.
C) after welding treatment: after having heated, uses discharging rod to bleed off on electric pole plate, lower electrode plate and the electrostatic of electrostatic field power output end in time; Open heating furnace door, take off vibration pressure head, take out experiment material.
The another kind of specific embodiment of the brazing tests method of ultrasonic vibration of the present invention and electric field-assisted, comprises the following steps:
A) welds prepares:
A) preparation of experiment material: 1) select the copper coin with step-like bridging arrangement as mother metal, and with the welding surface of 400# ~ 800# sand papering mother metal, with acetone soak, cleaning, dry rear for subsequent use; 2) Sn2.5Ag0.7Cu0.1RE solder is made the thin slice of 10 × 12 × 0.1mm, soak with acetone, clean, dry rear for subsequent use; 3), between faying surface solder being placed in the upper and lower corresponding of the bridging arrangement of two mother metals, the bridging arrangement make-up of two pieces of mother metals is overlapped, solder respectively drip 1 ~ 2 commercially available commercialization washing brazing flux up and down;
B) debugging of welding equipment: 1) electrostatic field power supply, ultrasonic wave generation plant-grid connection 220V alternating current; 2) the ultrasonic wave oscillation power needed for setting is after 88W, closes ultrasonic wave generation power supply, opens when experiment needs; 3) take lower electrode plate to connect the connection of electrostatic field power supply positive direct-current high-voltage output end, electric pole plate earth connection, set up electrostatic field voltage, after making the field intensity of electrostatic field reach 1.5kV/cm, close electrostatic field power supply, open when experiment needs.
B) brazing process: heating furnace electrified regulation opens heating furnace door after reaching 270 DEG C, is placed on the insulation brazing work bench in heating furnace above lower electrode plate by experiment material, vibration pressure head is pressed in the edge of mother metal, closed heating furnace door; After furnace temperature to be heated reaches 270 DEG C again, in the middle part of ultrasonic wave transmission lever, apply weights, 1.3MPa pressure is applied to sample, apply power 88W, the ultrasonic vibration of frequency 20kHz and the electrostatic field of field intensity 1.5kV/cm simultaneously, start soldering and timing.
C) after welding treatment: close ultrasonic wave generation power supply when soldering starts 45 seconds, stops applying ultrasonic vibration; Close electrostatic field power supply when 60 seconds, and bleed off the residual statics of electric pole plate and lower electrode plate and electrostatic field power source internal with discharging rod; Take off weights when 120 seconds, open heating furnace door, take out experiment material.
D) soldered fitting shear strength is detected: after experiment material cooling, measure the shear strength of soldered fitting with tension gage, testing result is shear strength 29.5MPa.
In other embodiment of the brazing tests method of ultrasonic vibration of the present invention and electric field-assisted, after welding treatment step can be omitted.
Claims (8)
1. the brazing tests device of a ultrasonic vibration and electric field-assisted, it is characterized in that, comprise the heating system for providing soldering thermal source for experiment material, for the electrostatic field application system to experiment material applying electrostatic field, for applying the ultrasonic wave load applying system of ultrasonic wave load to experiment material, described electrostatic field application system comprises electrostatic field power supply, the electric pole plate be connected with electrostatic field power electric and lower electrode plate, the upper surface of described lower electrode plate is provided with the insulation brazing work bench for placing experiment material, and the table top of insulation brazing work bench is the plane for placing experiment material, ultrasonic wave load applying system comprise ultrasonic wave generation systems that ultrasonic vibration source is provided and by ultrasonic wave vibration passing to the ultrasonic vibration transmission system of experiment material, described ultrasonic wave generation systems comprises ultrasonic wave generation power supply, the piezoelectric ceramic transducer be connected with ultrasonic wave generation power supply, ultrasonic vibration transmission system comprises support, to be connected or elastics wing connects for stretching into the ultrasonic wave transmission lever between described electric pole plate and lower electrode plate with hinged swing of support, be fixedly arranged on the vibration pressure head for compressing experiment material in ultrasonic wave transmission lever, described piezoelectric ceramic transducer is fixed in ultrasonic wave transmission lever, the described ultrasonic wave transmission lever part stretched between electric pole plate and lower electrode plate all adopts with vibration pressure head and can prevent from causing the insulating ceramics of shielding to make to electrostatic field,
The brazing tests device of described ultrasonic vibration and electric field-assisted is exclusively used in the brazing tests method implementing ultrasonic vibration and the electric field-assisted comprised the following steps:
A) welds prepares:
A) preparation of experiment material: 1) process step-like bridging arrangement on the mother metal that soldering is used, with sand paper or equipment for grinding the welding surface of mother metal is polished flat, bright and clean, and to clean with acetone or alcohol, dry or dry up rear for subsequent use; 2) by solder produced as sheets; 3), between faying surface solder being placed in the upper and lower corresponding of the bridging arrangement of two mother metals, the bridging arrangement make-up of two pieces of mother metals is overlapped;
B) debugging of welding equipment: 1) by the alternating current of electrostatic field power supply, ultrasonic wave generation plant-grid connection 220V; 2) close ultrasonic wave generation power supply after the ultrasonic wave oscillation power needed for setting, open when experiment needs; 3) close electrostatic field power supply after setting up the electrostatic field kind of needs, polarity, voltage, open when experiment needs;
B) brazing process: experiment material is positioned on the insulation brazing work bench between the electric pole plate of electrostatic field application system and lower electrode plate, the ultrasonic wave transmission lever be connected with the ultrasonic vibration source of setpoint frequency is stretched in described electrostatic field, and by the vibration pressure head that ultrasonic wave transmission lever is fixedly connected with, ultrasonic wave load is applied to experiment material, design temperature is heated to the experiment material be in electrostatic field, make brazing filler metal melts, two mother metals that overlap joint is arranged are linked together.
2. according to the brazing tests device of the ultrasonic vibration described in claim 1 and electric field-assisted, it is characterized in that, heating system comprises for providing the heating furnace of soldering thermal source, the thermocouple be located in heating furnace for experiment material, the temperature control instrument of the ambient temperature for monitor and forecast experiment material be connected with thermocouple be located at outside heating furnace, described electric pole plate and lower electrode plate are arranged in heating furnace, described ultrasonic wave transmission lever one end is stretched out outside heating furnace, and described ultrasonic wave generation power supply is located at outside heating furnace.
3. the brazing tests device of ultrasonic vibration according to claim 1 and electric field-assisted, it is characterized in that, also comprise experiment porch, described electric pole plate and lower electrode plate are placed on experiment porch respectively by dielectric support, the insulator supporting electric pole plate is insulated column, the insulator supporting lower electrode plate is insulation board, and described insulation brazing work bench, insulation board are made by the silicon nitride ceramics with high strength, and insulation brazing work bench and insulation board are disc.
4. the brazing tests device of ultrasonic vibration according to claim 1 and electric field-assisted, is characterized in that, the spacing between electric pole plate and lower electrode plate is not less than 3cm, and the electrostatic field intensity scope between electric pole plate and lower electrode plate is 0 ~ 6.6 kV/cm.
5. the brazing tests device of ultrasonic vibration according to claim 1 and electric field-assisted, is characterized in that, assembling pressurization counterweight in described ultrasonic wave transmission lever.
6. the brazing tests device of ultrasonic vibration according to claim 1 and electric field-assisted, it is characterized in that, described electrostatic field power supply is the positive direct-current high pressure that can provide 0 ~ 20kV, negative dc high voltage, the electrostatic field power supply of ac high-voltage and high voltage pulse, electrostatic field power supply has positive direct-current high-voltage output end, negative dc high voltage output, ac high-voltage output, positive direct-current high voltage pulse output and earth terminal, the positive direct-current high-voltage output end of electrostatic field power supply, negative dc high voltage output, ac high-voltage output, any two in positive direct-current high voltage pulse output and earth terminal are connected with the contact conductor of lower electrode plate with electric pole plate respectively.
7. according to the brazing tests device of the ultrasonic vibration in claim 1 ~ 6 described in any one and electric field-assisted, it is characterized in that, described ultrasonic wave generation systems also comprises the amplitude transformer for amplifying amplitude, described piezoelectric ceramic transducer and amplitude transformer Connecting groups synthesize assembly and are together fixed in ultrasonic wave transmission lever, and described ultrasonic wave generation power supply has the oscillation power of 0 ~ 300W and the vibration frequency of 20 ~ 40kHz.
8. the brazing tests device of ultrasonic vibration according to claim 7 and electric field-assisted, it is characterized in that: described support comprises sliding rail and with the described ultrasonic wave transmission lever hinged sliding sleeve of guiding slidable fit on sliding rail of above-below direction guiding, the amplitude transformer of described ultrasonic wave generation systems is screwed the top of the close support one end in ultrasonic wave transmission lever, and amplitude transformer direction of vibration is vertical with the length bearing of trend of ultrasonic wave transmission lever.
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| CN104785880A (en) * | 2015-05-05 | 2015-07-22 | 哈尔滨工业大学（威海） | Ultrasonic electric field auxiliary braze-welding device and welding method |
| CN107052493B (en) * | 2017-04-10 | 2023-05-26 | 河南科技大学 | Multi-field auxiliary brazing device and method |
| CN107584185A (en) * | 2017-09-27 | 2018-01-16 | 河南科技大学 | A kind of ultrasonic brazing technique of Ni-coated graphite alkene enhancing tin-base lead-free composite soldering |
| CN108890114B (en) * | 2018-07-20 | 2020-07-31 | 太原理工大学 | Pulse electric field and ultrasonic field assisted metal matrix composite sintering synchronous connection method and device |
| CN110220825B (en) * | 2019-07-04 | 2022-03-18 | 兰州理工大学 | Wettability testing device under action of ultrasonic thermoelectric composite field |
| CN114654069A (en) * | 2022-01-24 | 2022-06-24 | 南京瑞为新材料科技有限公司 | Molybdenum-copper alloy heat sink ultrasonic-assisted diffusion bonding manufacturing method based on pulse current heating and diffusion welding device |
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| DE102009000892A1 (en) * | 2008-11-25 | 2010-06-17 | Slv Halle Gmbh | Method for layer application of film-shaped soldering materials by ultrasonic welding on same or different surfaces of component, comprises coupling the ultrasonics on component surface to its activation and wettability |
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Application publication date: 20130717 Assignee: Luoyang Lei Jia Electronic Technology Co., Ltd. Assignor: Henan University of Science and Technology Contract record no.: X2019980000344 Denomination of invention: Brazing experimental device and method assisted by supersonic vibration and electric fields Granted publication date: 20150617 License type: Common License Record date: 20191111 |
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