CN106346192B - Ultrasonic burnishing process - Google Patents
Ultrasonic burnishing process Download PDFInfo
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- CN106346192B CN106346192B CN201610823005.3A CN201610823005A CN106346192B CN 106346192 B CN106346192 B CN 106346192B CN 201610823005 A CN201610823005 A CN 201610823005A CN 106346192 B CN106346192 B CN 106346192B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/02—Treating or finishing by applying pressure, e.g. knurling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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Abstract
The present invention provides a kind of ultrasonic burnishing process, including：A kind of ultrasonic burnishing processing unit (plant) for being adapted to complex surface is provided, including：Housing unit；Hydraulic package；And ultrasonic assembly, ultrasonic assembly are fixed in housing unit and connect hydraulic package, ultrasonic assembly includes：Transducer, transducer are connected with ultrasonic generator；Ultrasonic transformer, the two edges curve of its radial section is Bezier；The first end of ultrasonic transformer is connected to the first end of transducer；And tool heads, tool heads are removably attachable to the second end of ultrasonic transformer；Ultrasonic burnishing processing unit (plant) is held on lathe, tool heads are placed in the position for the surface to be treated for touching workpiece；Regulation hydraulic package makes it export 100 2000N static pressure；Regulation ultrasonic assembly makes the output end axial amplitude of ultrasonic transformer be 5~30 μm；The movement locus for concurrently setting lathe carries out ultrasonic burnishing processing.The ultrasonic burnishing process of the present invention has the advantages that efficiency high, energy loss are few.
Description
Technical field
The present invention relates to metal surface treating apparatus field, more particularly to a kind of ultrasonic burnishing process.
Background technology
It is a kind of preferably surface peening means that surface rolling, which is strengthened, and it can prepare fine and closely woven nanometer in component surface
Layer, improve material various aspects of performance coefficient；Also can make in impaired workpiece surface, such as aircraft engine blade to having put into
This base part carries out secondary reparation, extends the cycle of being on active service, and obtains nano level surface smoothness simultaneously, for reducing by zero
The roughness on part surface, residual compressive stress is introduced, improve the corrosion-resistant of part, wearability and anti-fatigue performance and be respectively provided with important meaning
Justice.
Ultrasonic burnishing processing is the method for work being combined using ultrasonic impact energy and static load rolling, is a kind of more efficient
Processing mode.In the machining tool head that existing ultrasound and rolling combine, one kind is that rolling tool is fixed on swivel mount
On, handle surface axially and radially；Another kind is force application part to be combined the cylinder work head rolled, can handle flat table
Face.Ultrasonic surface rolling depression method is generalized to curved-surface structure, there is important economical and practical value and wide application prospect.
Existing ultrasonic burnishing process is generally smaller with range ability, and its range of work can not meet higher-strength
Intensity requirement needed for material experiment.And the head shell for fixing head tool heads of existing ultrasonic burnishing processing unit (plant) with
Housing main body is integrally formed or is unremovably fixedly connected, and head shell will occur wearing but nothing in use for some time
The situation that method is changed, causes tool heads to pitch, can not recur fixation；And the existing apparatus after wearing can influence the essence of processing
Degree, it is as set identical parameter after same material is surface-treated a period of time, obtained result is different.
The content of the invention
For above-mentioned deficiency of the prior art, the present invention provides a kind of ultrasonic burnishing process, has efficiency high, energy
Amount loss less, small volume, the advantages of service life is long, thermal diffusivity is good, flexibility is high, versatility is good and in light weight.
To achieve these goals, a kind of ultrasonic burnishing process of the invention, comprises the following steps：S1, there is provided one
Kind is adapted to the ultrasonic burnishing processing unit (plant) of complex surface, including：One housing unit；One hydraulic package；And a ultrasonic assembly,
The ultrasonic assembly is fixed in the housing unit and connects the hydraulic package, and the ultrasonic assembly includes：One transducer,
The transducer is connected with a ultrasonic generator；One ultrasonic transformer, the two edges curve of its radial section is Bezier；It is described
The first end of ultrasonic transformer is connected to the first end of the transducer；With a tool heads, the tool heads are removably attachable to institute
State the second end of ultrasonic transformer；S2, the described ultrasonic burnishing processing unit (plant) for being adapted to complex surface is held on lathe, and by work
Tool head is placed in the position for the surface to be treated for touching workpiece；S3, adjusting the hydraulic package makes it export 100-2000N static pressure
Power；S4, regulation ultrasonic assembly make the output end axial amplitude of the adjacent tools head of ultrasonic transformer be 5~30 μm；Concurrently set lathe
Movement locus carry out ultrasonic burnishing processing.
Preferably, the hydraulic package includes：A hydraulic pump, a fluid pressure line and the hydraulic jack being sequentially connected,
One hydralic pressure gauge is arranged on the fluid pressure line, and the hydraulic jack is fixed in the housing unit and the neighbouring transducing
Second end of device.
Preferably, an elastomer, the material of the elastomer are provided between the hydraulic jack and the transducer
For compounded rubber.
Preferably, the housing unit includes：One shell and a ultrasonic fixation kit, the ultrasonic assembly pass through described super
Sound fixation kit is installed in the shell；The ultrasonic fixation kit includes a cannulated sleeve and positioned at the cannulated sleeve two
First end cap and the second end cap at end；First end cap is sheathed on the second end of the transducer, and the elastomer is arranged at
Between the hydraulic jack and first end cap；A first through hole is formed in the middle part of second end cap, the ultrasonic transformer
One second end is stretched out from the first through hole.
Preferably, the shell includes a main body cover, a head shell and a fixture；Main body cover one into
Type；The second through hole is formed in the middle part of the fixture；The fixture connects the main body cover and coordinated with the main body cover
An installing space is formed, the ultrasonic assembly is arranged in the installing space；The end of ultrasonic transformer second is logical from described first
Hole and second through hole stretch out；The head shell is removably attachable to the main body cover and covers at the ultrasonic transformer
Outside second end.
Preferably, the shell also includes a head fixed cover, and the head fixed cover is detachably secured to the head
The end of portion's shell.
Preferably, the tool heads include ball, and ball is fixed in the fixed cover of head, ultrasonic transformer end thread connection one
Cylinder, cylinder ends contradict ball, and end plane is provided with the pit of an envelope ball.
Preferably, the setting value of the ultrasonic generator is 28KHz.
Preferably, feed-speed is set in 2~10 meters of scopes per minute, process come and go number be set as 2~
10 times.
Preferably, the output end axial amplitude of the adjacent tools head of ultrasonic transformer is 6~24 μm.
The present invention makes it have following beneficial effect as a result of above technical scheme：
Ultrasonic generator is used to provide power supply.Transducer is used to fluctuation caused by ultrasonic generator being converted into vertically
Vibrations.Ultrasonic transformer is used to amplify vibration amplitude caused by transducer.Tool heads directly contact with workpiece to be processed surface, and phase occurs
Interaction.The two edges curve of the radial section of ultrasonic transformer is Bezier, so available higher axial displacement amplification
Multiplying power and smaller section stress.Tool heads are removably attachable to the ultrasonic transformer so that tool heads can be carried out easily
Change.The use of hydralic pressure gauge facilitates the real-time monitoring to hydraulic line pressure, facilitates operating personnel when pressure decays
Adjusted manually, keep the pressure value of setting.Compared to common spring, using the deformation system of the elastomer of compounded rubber material
Number is smaller, so as to produce smaller deformation under uniform pressure effect, saves installing space.The use of hollow-out parts can be
The weight of alleviator on the basis of proof strength.Head fixed cover is detachably secured to the end of the head shell, makes
Obtain head fixed cover can easily to be replaced when wearing during use, reduce the maintenance cost of device,
It ensure that the precision of process.Main body cover is integrally formed, and reduces coupling part, can be reduced due to caused by connecting portion
SATT or interference.Radiator fan and heat emission hole are all used to carry out radiating and cooling to ultrasonic assembly.
Brief description of the drawings
Fig. 1 is the ultrasonic assembly and housing group of the ultrasonic burnishing processing unit (plant) for being adapted to complex surface of the embodiment of the present invention
The attachment structure schematic diagram of part；
Fig. 2 is the structural representation of the hydraulic package of the embodiment of the present invention；
Fig. 3 is the structural representation of the ultrasonic generator of the embodiment of the present invention；
Fig. 4 is a kind of tool heads of the embodiment of the present invention and the attachment structure schematic diagram of head fixed cover；
Fig. 5 is the schematic diagram of the angle between ball and head fixed cover in one embodiment of the present of invention；
Fig. 6 a are crystal grain schematic diagram of the workpiece before ultrasonic burnishing；
Fig. 6 b are crystal grain schematic diagram of the workpiece after ultrasonic burnishing.
Embodiment
Below in conjunction with the accompanying drawings, presently preferred embodiments of the present invention is provided, and is described in detail, makes to be better understood when this hair
Bright function, feature.
Included providing a kind of ultrasonic burnishing for being adapted to complex surface first according to the ultrasonic burnishing process of the present invention
Processing unit (plant).Referring to Fig. 1, a kind of ultrasonic burnishing processing unit (plant) for being adapted to complex surface of the present invention, including：One housing group
Part 1, a hydraulic package 2 and a ultrasonic assembly 3, wherein, the part and ultrasonic assembly 3 of hydraulic package 2 are fixed on housing group
In part 1, and the part of hydraulic package 2 contradicts ultrasonic assembly 3 by elastomer 4, and ultrasonic assembly 3 is in horizontal type structure.
Specifically, housing unit 1 includes：One shell 11 and a ultrasonic fixation kit 12, ultrasonic assembly 3 are solid by ultrasound
Determine component 12 to be installed in shell 11.
In the present embodiment, shell 11 includes a main body cover 111, a head shell 112 and a fixture 113, fixture
113rd, head shell 112 is all socketed on one end of main body cover 111, then radially secure by bolt, is allowed to not move axially.
Wherein, main body cover 111 is integrally formed, and reduces coupling part, can be reduced due to SATT caused by connecting portion or dry
Disturb.Fixture 113 cooperatively forms an installing space with main body cover 111, and ultrasonic assembly 3 is arranged in installing space.This implementation
In example, shell 11 also includes a head fixed cover 114, and head fixed cover 114 is detachably secured to the end of head shell 112
Portion so that head fixed cover 114 can be replaced easily when being worn during use, reduce the dimension of device
Cost is protected, ensure that the precision of process.
In the present embodiment, ultrasonic fixation kit 12 includes：One first end cap 121, one second end cap 122 and a cannulated sleeve
123, the first end cap 121 and the second end cap 122 are bolted on the both ends of cannulated sleeve 123, the side wall of cannulated sleeve 123
Open up an at least hollow-out parts (not shown), can on the basis of proof strength alleviator weight, in the present embodiment, engrave
Empty portion uses elliptical aperture.First end cap 121 and the second end cap 122 connection main body cover 111.
Incorporated by reference to Fig. 1 and Fig. 2, hydraulic package 2 includes：One hydralic pressure gauge 21, a hydraulic pump 22, the hydraulic tube being sequentially connected
The hydraulic jack 24 of road 23 and one.
In the present embodiment, hydralic pressure gauge 21 is located at the front end of fluid pressure line 23, can monitor pressurized state in real time.Hydraulic pump 22 uses
Manual pump, if having in process, pressure has and changed by a small margin, can adjust in time.The cooperation of hydralic pressure gauge 21 and manual pump is convenient
Operating personnel are adjusted manually when pressure decays, and keep the pressure value of setting.Hydraulic jack 24 uses flat thousand
Jin top, the piston of hydraulic jack 24 contact the first end cap 121 by elastomer 4, and hydraulic jack 24 is by promoting first end
Lid 121 applies a force to ultrasonic assembly 3.
Fig. 1 is returned again to, ultrasonic assembly 3 includes：A transducer 31, a ultrasonic transformer 32 and the tool heads 33 being sequentially connected.
Wherein, phase is formed respectively between the first end of transducer 31 and the first end of ultrasonic transformer 32 and the end of ultrasonic transformer 32 second and tool heads 33
The helicitic texture that mutually coordinates simultaneously is threadedly coupled by the bumps of helicitic texture, is needed to tighten in assembling process, is ensured to be brought into close contact, prevents
Energy is stopped and loss is produced in transmittance process.Screw connection structure between the end of ultrasonic transformer 32 second and tool heads 33 causes work
Tool first 33 can be changed easily, to adapt to different process requirements., can be according to need due to the convertibility of tool heads 33
To select the tool heads 33 of different size shapes.In working condition, ultrasonic assembly 3 produces supersonic frequency machinery and shaken in the axial direction
Dynamic, stimulation tool first 33 does ultrasonic frequency vibration.In the present embodiment, the first end cap 121 of ultrasonic fixation kit 12 is sheathed on transducing
Second end of device 31；Contain one group of piezoelectric ceramic piece (not shown) in transducer 31, in the corresponding piezoelectric ceramic piece of transducer 31
The radiating that a radiator fan 5 is used for transducer 31 is fixed with the shell 11 of position, this can not be also installed in other embodiments
Radiator fan 5.Radiator fan 5 can use all-purpose adhesive and the gluing of main body cover 111.
In the present embodiment, the middle part of the second end cap 122 of ultrasonic fixation kit 12 forms a first through hole, fixture 113
Middle part forms one second hole all；The end of ultrasonic transformer 32 second is stretched out from first through hole and the second through hole；Head shell 112 covers at
Outside the end of ultrasonic transformer 32 second.
In the present embodiment, tool heads 33 can be arranged in a tool heads fixing axle 115, in other embodiments, also may not be used
Using tool heads fixing axle 115, tool heads 33 are directly fixed in head fixed cover 114.It is detachable in tool heads fixing axle 115
Ground is fixed on head fixed cover 114, in the present embodiment, passes through screw thread knot between tool heads fixing axle 115 and head fixed cover 114
Structure connects.
Due to ultrasonic transformer 32 and the vibration frequency of tool heads 33 is higher is also required to radiate, the main body cover 111 of shell 11 and/or
Head shell 112 offers heat emission hole (not shown).Heat emission hole wherein on head shell 112 is close to workpieces processing, punching
Afterwards, can be radiated by the coolant that outside sprays into when Direct Air-Cooled or processing.
In addition, in the present embodiment, ultrasonic assembly 3 is connected in vibration nodal point position with main body cover 111, transducer 31
The vibration nodal point of portion and ultrasonic transformer 32 is located at the resting position of the vibrations of ultrasonic assembly 3.The wherein vibrations node about position of ultrasonic transformer 32
1/3 opening position in transducer 31 close to the second end, particular location can be by related tools (such as：ANSYS simulation vibrations) are prepared
Design sketch obtains.Ultrasonic assembly 3 fixes the first end cap 121 and the second end cap 122 and the phase of main body cover 111 at vibration nodal point
Even, the first end cap 121 and the second end cap 122 are interference fitted with main body cover 111.
It please join with reference to 1 and Fig. 3, a ultrasonic generator 34 is used to provide power supply to ultrasonic assembly 3, by electric wire 35 by accessing
The access of hole 115 connection transducer 31, the joint soldering welding between electric wire 35 and transducer 31 prevent from leaking electricity.Radiator fan 5
Power supply can also be incorporated into the electronic box of ultrasonic generator 34.
In the present embodiment, ultrasonic generator 34 has the function of automatic tracing frequency in certain limit, that is, automatically adjusts defeated
Going out voltage and current makes the frequency of connected vibration body reach setting value, setting value 28KHz, higher than typically using on the market
20KHz, there is provided higher energy density.Because power needed for processing is in a kilowatt rank, transducer 31 uses 28KHz piezoelectricity pottery
Porcelain transducer, performance are more stable.Compared with the 20KHz used on the market prior art, ultrasonic generator 34 of the invention by
In the size reduction of ultrasonic transformer 32 for causing to be used cooperatively with higher frequency about half so that whole sound rolling and processing dress
That puts is smaller, and design is more compact.Relevance grade is higher in the process for coordinating lathe.
In the present embodiment, transducer 31 is used to that the vibrations being converted into vertically will to be fluctuated caused by ultrasonic generator 34.Become
Width bar 32 is used to amplify vibration amplitude caused by transducer 31.The two edges curve of the radial section of ultrasonic transformer 32 is that Bezier is bent
Line, Bezier have four control points, and the position at control point can cause the difference of curve shape；Imported with Solidworks bent
Line and the threedimensional model for establishing ultrasonic transformer, import finite element software and calculate, and model analysis is carried out under conditions of extraneous 28KHz
And harmonic responding analysis；After experiment repeatedly, the optimal dimension curve of vibrating effect is obtained, i.e. the amplification coefficient of end is higher, and should
Power distribution is more uniform, and maximum stress is smaller.
For the ultrasonic transformer 32 of equal length, it is compared with large end face and the timing of the ratio in small end face one, such a Curve Design
The ultrasonic transformer 32 gone out has bigger vibrations amplification coefficient and smaller stress concentration, so can obtain higher axial displacement and puts
Big multiplying power and smaller section stress so that ultrasonic transformer 32 has bigger axial amplitude, and adds the use of ultrasonic transformer 32
Life-span.The output end axial amplitude of the adjacent tools of ultrasonic transformer 32 first 33 is 5~30 μm.Tool heads 33 and workpiece to be processed surface are straight
Contact, interacts.
Referring to Fig. 1, elastomer 4 can buffer tool heads 33 and impact momentum caused by workpiece rigid contact, one is formed
The contact of kind " flexibility ".In the present embodiment, the material of elastomer 4 is compounded rubber.Compared to common spring, using compounded rubber
The deformation coefficient of the elastomer 4 of material is smaller, and so as to produce smaller deformation under uniform pressure effect, it is empty to save installation
Between.
The concrete form of above-mentioned tool heads 33 is illustrated below：
Fig. 4 is referred to, tool heads 33 are spherical ball type, and the tool heads 33 include ball 331, and ball 331 is fixed on head
In portion's fixed cover 114, head fixed cover 114 is spirally connected with head shell 112, and the end thread of ultrasonic transformer 32 connects a cylinder, circle
Cylindrical end portions contradict ball 331, and end plane is provided with the pit of an envelope ball, and pit is axially equipped with a number of small
Hole, friction is reduced in the case where ensureing vibrations conduction, prevents that ball 331 is stuck in process.It can design according to demand
The ball 331 of different sphere diameters, different balls 331 are furnished with the head fixed cover 114 of different size, and specific size will according to sample
Depending on asking, by being illustrated as scaling diminution.
Next included rolling the above-mentioned ultrasound for being adapted to complex surface according to the ultrasonic burnishing process of the present invention
Pressure processing unit (plant) is held on lathe, and tool heads 33 are placed in the position for the surface to be treated for touching workpiece.
Next include supercharging hydraulic hand-pump 22 according to the ultrasonic burnishing process of the present invention, make in fluid pressure line 23
Pressure rise in the range of 501-2000N.For static pressure is in 50-500N prior art, of the invention is super
The static pressure of sound rolling technology significantly increases, so as to process the higher material of intensity.
Next include the movement locus that setting accommodates lathe according to the ultrasonic burnishing process of the present invention so that instrument
Relative movement is produced between first 33 and the surface to be treated of workpiece, wherein, feed-speed be set in 2~10 meters it is per minute
In the range of, process and come and go number and be set as 2~10 times, the output end axial amplitudes of the adjacent tools first 33 of ultrasonic transformer 32 for 5~
30μm.Preferably, feed-speed is set in 2-5 rice scope per minute, so as to pass through relatively low reciprocating feed speed
To obtain preferable surface quality.Preferably, process round number to be set as 2-6 times, so as to improve degree of grain refinement and receive
Rice layer depth.It should be understood that processing comes and goes number nor The more the better, because processing times are more to influence ultrasonic burnishing work
The efficiency of skill.Preferably, the output end axial amplitude of the adjacent tools of ultrasonic transformer 32 first 33 is 6~24 μm.
The ultrasonic burnishing processing unit (plant) for being adapted to complex surface of the present invention improves the connection of each part, is allowed to integration
Degree is higher；Ensure it is strong in the case of, compression set size, be allowed to lathe on by smaller limitation；Improve
Biasing strength maximum, it is allowed to be applied to the higher material of intensity, with performance is more excellent, the scope of application is wider, suitable for strong
The advantages of spending the surface treatment of higher material and accurate control.
In the ultrasonic burnishing process according to the present invention, the service life of ball 331 is about in the scope of 30-48 hours
It is interior.When the surface to be treated of workpiece is plane, ball 331 is most long to be used 48 hours, and the ball 331 is not in card
Stubbornly refuse situation about turning；When the surface to be treated of workpiece is disc, ball 331 can be more preferable after using 30 hours；Work as workpiece
Surface to be treated when being curved surface, should take the circumstances into consideration to change according to actual conditions, such as i.e. progress is more after 1-2 workpiece handle
Get well to ensure to influence treatment effect in the absence of stuck phenomenon.
In particularly preferred one embodiment, the angle between ball 331 and head fixed cover 114 is 19 °, such as Fig. 5
It is shown.The angle is shown as the folder between the line of ball 331 and the port of head fixed cover 114 and the radial direction of head fixed cover 114
Angle.By the setting of the angle, when the surface to be treated of workpiece is curved surface, the angle that can adjust tool heads 33 causes instrument
First 33 remain in the range of 71 °~90 ° with the surface to be treated of workpiece, influence workpiece surface matter to prevent from scratching
Amount.It should be understood that the angle can adjust in the range of 15-24 °.If angle too small, cause to scratch and take place frequently, and if angle
Spend greatly, cause intensity to be affected.
In particularly preferred one embodiment, tool heads 33 by hard alloy (i.e. kennametal YT15) or
Toughened ceramic material is formed, and so as to handle the instrument with higher-strength, and can be improved on workpiece and be formed
Nano-crystalline layers.
For the higher titanium alloy of intensity hardness (such as more than yield strength 800Mpa, more than hardness HRC50) or
The workpiece of the material manufactures such as GH4169, and workpiece smaller (such as plate of material within 50*100mm) and Surface Quality have it is high thick
Rugosity requires (surface roughness is up to 0.1 micron), then rolling and processing process should select diameter to be less than 5mm (such as 3mm specifications)
Ball 331.
For intensity, higher (such as 500~800MPa of yield strength, hardness are HRC30 or so material, or yield strength
300~500Mpa, more than hardness 50HRC material) as Hardmetal materials manufacture workpiece, if workpiece roll scope compared with
(such as specification more than 200*500mm areas) greatly, roughness and degree of grain refinement there are certain requirements (such as surface roughness
Reach 0.3 micron), then from diameter 5mm ball 331.
For 300~500Mpa of yield strength material, hardness 30HRC or so material (such as 45 steel, No. 20 steel) is made
The workpiece made, if Surface Quality there are certain requirements, the ball 331 of a semi-selection 8mm sphere diameters in process.
For the material of the manufactures such as copper, almag, quality is softer, selects the ball 331 of 10mm sphere diameters to process.And
Can not be long if processing duration, it is desirable to the sample quickly handled, even being made up of Materials with High Strength such as titanium alloys, same selection
The head of 10mm sphere diameters, the smaller sphere diameter of processing effect have a great influence to surface roughness, but increase processing pass, plastic deformation
Amount increase, can also reach corresponding degree of grain refinement, surface roughness is about 0.4 micron.
Also included coating lubricating fluid on ball 331 according to the ultrasonic burnishing process of the present invention, to reduce tool heads
Friction between 33 and workpiece to be machined；Heat caused by taking away processing simultaneously, prevent that material is because temperature raises in process
Material and tool heads 33 to workpiece cause extra influence.Such as tool steel such as 45 steel, such a steel heat resistance is poor,
Seeking the cooling effect of coolant will get well, typically using emulsion；For the steel alloy containing elements such as NI-Gs, using oil base or
Water-base cutting fluid.High performance material such as TC4 etc. is handled, it is general from the oil base cutting fluid containing antiwear additive, while
The cutting fluid of the part of workpiece and processed sample contacts spray big flow ensures heat dissipation capacity.
Crystal grain of the workpiece before ultrasonic burnishing is as shown in Figure 6 a.After rolling, workpiece material forms one layer of cause on surface
In the nanocrystalline of random distribution, crystal grain has obtained significantly thin for the shaft-like such as close nanostructured surface laye, formation, crystal grain orientation
Change, case hardness improves, and surface roughness reduces, as shown in Figure 6 b.
Record above, only presently preferred embodiments of the present invention, be not limited to the scope of the present invention, of the invention is upper
Stating embodiment can also make a variety of changes.What i.e. every claims and description according to the present patent application were made
Simply, equivalent changes and modifications, the claims of patent of the present invention are fallen within.
Claims (9)
1. a kind of ultrasonic burnishing process, comprises the following steps：
S1, there is provided a kind of ultrasonic burnishing processing unit (plant) for being adapted to complex surface, including：
One housing unit；
One hydraulic package；And
One ultrasonic assembly, the ultrasonic assembly are fixed in the housing unit and connect the hydraulic package, described ultrasonic group
Part includes：
One transducer, the transducer are connected with a ultrasonic generator；
One ultrasonic transformer, the two edges curve of its radial section is Bezier, and four control points of the Bezier pass through
Model analysis and harmonic responding analysis determine；The first end of the ultrasonic transformer is connected to the first end of the transducer；With
One tool heads, the tool heads are removably attachable to the second end of the ultrasonic transformer；
S2, the described ultrasonic burnishing processing unit (plant) for being adapted to complex surface is held on lathe, and tool heads are placed in and touched
The position of the surface to be treated of workpiece, the surface to be treated are curved surface, adjust tool heads angle cause tool heads with it is described
Surface to be treated is remained in the range of 71 °~90 °；
S3, adjusting the hydraulic package makes it export 501-2000N static pressure；
S4, the rated frequency for setting the ultrasonic generator and transducer is 28KHz, and regulation ultrasonic assembly makes the neighbour of ultrasonic transformer
The output end axial amplitude of nearly tool heads is 5~30 μm；The movement locus for concurrently setting lathe carries out ultrasonic burnishing processing.
2. ultrasonic burnishing process according to claim 1, it is characterised in that the hydraulic package includes：Connect successively
A hydraulic pump, a fluid pressure line and the hydraulic jack connect, a hydralic pressure gauge are arranged on the fluid pressure line, the hydraulic pressure thousand
Jin top is fixed in the housing unit and adjacent to the second end of the transducer.
3. ultrasonic burnishing process according to claim 2, it is characterised in that the hydraulic jack and the transducing
An elastomer is provided between device, the material of the elastomer is compounded rubber.
4. ultrasonic burnishing process according to claim 3, it is characterised in that the housing unit includes：One shell
With a ultrasonic fixation kit, the ultrasonic assembly is installed in the shell by the ultrasonic fixation kit；
The ultrasonic fixation kit includes a cannulated sleeve and the first end cap and the second end cap positioned at the cannulated sleeve both ends；
First end cap is sheathed on the second end of the transducer, and the elastomer is arranged at the hydraulic jack and described first
Between end cap；A first through hole is formed in the middle part of second end cap, the second end of the ultrasonic transformer is stretched out from the first through hole.
5. ultrasonic burnishing process according to claim 4, it is characterised in that the shell include a main body cover,
One head shell and a fixture；The main body cover is integrally formed；The second through hole is formed in the middle part of the fixture；The fixation
Part connects the main body cover and cooperatively forms an installing space with the main body cover, and the ultrasonic assembly is arranged at the peace
Fill in space；The end of ultrasonic transformer second is stretched out from the first through hole and second through hole；The head shell is detachable
Ground is connected to the main body cover and covered at outside the end of ultrasonic transformer second.
6. ultrasonic burnishing process according to claim 5, it is characterised in that the shell is also fixed including a head
Set, the head fixed cover are detachably secured to the end of the head shell.
7. ultrasonic burnishing process according to claim 6, it is characterised in that the tool heads include ball, ball
It is fixed in the fixed cover of head, ultrasonic transformer end thread connects a cylinder, and cylinder ends contradict ball, and cylinder ends are put down
Face is provided with the pit of an envelope ball.
8. ultrasonic burnishing process according to claim 1, it is characterised in that feed-speed is set in 2~10
In rice scope per minute, process round number and be set as 2~10 times.
9. ultrasonic burnishing process according to claim 1, it is characterised in that the output of the adjacent tools head of ultrasonic transformer
It is 6~24 μm to hold axial amplitude.
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| CN108330264A (en) * | 2017-12-22 | 2018-07-27 | 华东理工大学 | A kind of surface strengthening device that track is controllable |
| CN109182698A (en) * | 2018-09-27 | 2019-01-11 | 河南理工大学 | Ultrasonic extrusion strengthening device capable of realizing tooth surface of multi-shaft linkage gear |
| CN109457094A (en) * | 2018-10-23 | 2019-03-12 | 河钢股份有限公司 | A kind of technique improving Cr12MoV steel surface performance |
| CN109719459A (en) * | 2019-02-25 | 2019-05-07 | 江苏福吉特管业有限公司 | A kind of surface rolling intensifying device and the method with its processing high pressure forging reducing pipe |
| CN110358901B (en) * | 2019-07-30 | 2023-08-25 | 河南理工大学 | Portable multidirectional ultrasonic-assisted vibration rolling device and application method thereof |
| CN110735104B (en) * | 2019-10-28 | 2020-09-18 | 山东大学 | In-situ ultrasonic rolling integrated device and method for thermal spraying |
| CN111118269B (en) * | 2019-12-23 | 2022-01-14 | 北京理工大学 | Method for regulating and controlling microstructure of ultrasonic rolling surface layer |
| CN112323059A (en) * | 2020-08-31 | 2021-02-05 | 江苏理工学院 | Preparation method of surface strengthening coating of aluminum alloy substrate |
| CN112899454B (en) * | 2021-01-14 | 2022-03-18 | 上海交通大学 | Surface strengthening device and method for applying elastic stress field to metal workpiece and assisting ultrasonic rolling |
| CN113981188A (en) * | 2021-09-23 | 2022-01-28 | 华东理工大学 | Trajectory-controllable bilateral ultrasonic rolling surface strengthening device |
| CN114654178A (en) * | 2022-05-17 | 2022-06-24 | 山东建筑大学 | Machining method for high-precision wear-resistant turbocharger bearing |
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| CN101219512A (en) * | 2008-01-29 | 2008-07-16 | 天津大学 | Ultrasonic executing agency and processing method for plane ultrasonic surface rolling |
| CN201263707Y (en) * | 2008-07-18 | 2009-07-01 | 华外医疗器械(上海)有限公司 | Medical ultrasound amplifying device |
| CN204504676U (en) * | 2015-04-09 | 2015-07-29 | 韩连江 | A kind of ultrasonic metal surface organisation of working of convertible machine direction |
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