CN202894894U - Soft abrasive particle flow machining device of loading of ultrasonic shock excitation - Google Patents

Abstract

A soft abrasive particle flow machining device of loading of ultrasonic shock excitation comprises a restraining flow channel base seat and a restraining module located on the upper portion of the restraining flow channel base seat, a restraining flow channel used for flowing of soft abrasive particles is formed between the restraining module and the restraining flow channel base seat, an inlet of the restraining flow channel is connected with an outlet of a hydraulic pump, a vibration part is installed on the restraining module and connected with an ultrasonic generator, a vibration sensor used for monitoring of a vibration signal value is installed on the restraining module, pressure sensors are respectively installed on the positions of the inlet and an outlet of the restraining flow channel, and a flow meter is installed on the position of the outlet of the restraining flow channel. The soft abrasive particle flow machining device of loading of the ultrasonic shock excitation further comprises a polishing controller, and the shock sensor, the pressure sensors and the flow meter are respectively connected with the polishing controller. The soft abrasive particle flow machining device of loading of the ultrasonic shock excitation further improves processing efficiency, reduces energy consumption, is suitable for machining of complex work pieces, and effectively eliminates a blind angle of the machining.

Description

Load the soft abrasive fluid processing unit (plant) of ultrasonic wave excitation

Technical field

The utility model relates to soft abrasive fluid Precision Machining field, especially a kind of soft abrasive fluid processing unit (plant).

Background technology

Nowadays, the fast fashion development of manufacturing industry, people are more and more higher to the required precision of piece surface, can use the technology such as gasbag polishing to the Precision Machining of part free form surface.Now the design of part of processing is complicated, and the patterned surfaces such as related ditch, groove, sky, prism, pyramid, narrow slit increase in the mould manufacturing, and are but relatively weaker to these surperficial precision finishing technical research.Liquid-solid two-phase soft abrasive fluid processing is to use soft abrasive fluid to form turbulent flow at the patterned surface of workpiece to be machined, is equipped with constraints module, makes surface to be machined become the part of runner wall, forms the abrasive particle runner.When abrasive Flow flows through this passage, wall coarse gone out to carry out the micro-cutting effect, implementation structureization just face without tool processes.

Output, circulation and the recovery of the base of processing flow channel, constraint runner, constraints module and abrasive Flow all are the piths of soft abrasive fluid.The processing of liquid-solid two-phase soft abrasive fluid is that turbulent flow take abrasive Flow is as theoretical foundation, take the mutual collision between abrasive particle and the collision between abrasive particle and wall as the basis, abrasive particle is carried out dynamic analysis, utilize that abrasive particle is to the shear action of wall in the Turbulent Flow Field, coarse place carries out Precision Machining to the workpiece to be machined wall.This technology has remedied traditional polishing processing method to the inferior position of patterned surface processing, also can process other complicated surface of the works simultaneously, and can realize automatic control

At present, mainly also there is following shortcoming in the soft abrasive fluid that just is being applied to process: 1, the pressure of hydraulic pump and flow are lower, speed and the turbulence intensity of abrasive Flow are lower, therefore produce process time partially long, working (machining) efficiency is low, energy consumption is excessive, does not reach desired processing effect.2, in the runner of complexity abrasive Flow fluidised form uncontrollable, some local turbulent dissipation is excessive, can form the inhomogeneous phenomenon of processing in processing dead angle and the whole runner.

Summary of the invention

Lower for the working (machining) efficiency that overcomes existing soft abrasive fluid processing unit (plant), energy consumption large, can not be applicable to complex part processing, have the deficiency at processing dead angle, the utility model provides a kind of and improves working (machining) efficiency, reduce energy consumption, be applicable to complex part processing, effectively eliminate the soft abrasive fluid processing unit (plant) of the loading ultrasonic wave excitation at processing dead angle.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of soft abrasive fluid processing unit (plant) that loads ultrasonic wave excitation, comprise constraint runner base and constraints module, described constraints module is positioned at the top of described constraint runner base, be formed for the constraint runner that the confession soft abrasive flows through between described constraints module and the described constraint runner base, the import of described constraint runner links to each other with the hydraulic pressure delivery side of pump, on the described constraints module vibrating mass is installed, described vibrating mass is connected with supersonic generator, vibrating sensor in order to the monitoring vibration signal value is installed on the described constraints module, at the entrance and exit place of constraint runner difference setting pressure sensor, flowmeter is installed in the exit; Described device also comprises in order to vibration signal, pressure signal and flow signal input fluid governing equation with Real-Time Monitoring, input speed by control pump and the frequency of supersonic generator are controlled the polishing controller of the fluidised form of soft abrasive fluid in real time, and described vibrating sensor, pressure sensor and flowmeter are connected with described polishing controller and are connected.

Further, top cover is installed in described constraints module top, and described top cover is fixedly connected with described constraint runner base.

Described vibrating mass is vibrating head, and described vibrating head is positioned at the middle part of constraints module, and described vibrating head and constraints module are by soft fixed tissue-welding.

The beneficial effects of the utility model are mainly manifested in: improve working (machining) efficiency, reduce energy consumption, be applicable to complex part processing, effectively eliminate the processing dead angle.

Description of drawings

Fig. 1 is the schematic diagram that loads the soft abrasive fluid processing unit (plant) of ultrasonic wave excitation.

Fig. 2 is the schematic diagram of constraint runner base.

Fig. 3 is the schematic diagram of constraints module.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 1 ~ Fig. 3, a kind of soft abrasive fluid processing unit (plant) that loads ultrasonic wave excitation, comprise constraint runner base 3 and constraints module 2, described constraints module 2 is positioned at the top of described constraint runner base 3, be formed for the constraint runner 6 that the confession soft abrasive flows through between described constraints module 2 and the described constraint runner base 3, the import of described constraint runner 6 links to each other with the hydraulic pressure delivery side of pump, vibrating mass 8 is installed on the described constraints module 2, described vibrating mass 8 is connected with supersonic generator, vibrating sensor in order to the monitoring vibration signal value is installed, at the entrance and exit place of constraint runner 6 difference setting pressure sensor on the described constraints module 2; Described device also comprises in order to vibration signal, pressure signal and flow signal input fluid governing equation with Real-Time Monitoring, input speed by control pump and the frequency of supersonic generator are controlled the polishing controller of the fluidised form of soft abrasive fluid in real time, and described vibrating sensor, pressure sensor and flowmeter are connected with described polishing controller and are connected.

Further, top cover 1 is installed in described constraints module 2 tops, and described top cover 1 is fixedly connected with described constraint runner base 3.

Described vibrating mass 8 is vibrating head, and described vibrating head is positioned at the middle part of constraints module, and described vibrating head is connected by soft fixed tissue 9 with constraints module.

As mentioned above, at the entrance and exit place of constraint runner 6 difference setting pressure sensor, obtain the pressure value at entrance and exit place.At runner exit the flow value that flowmeter obtains abrasive Flow is installed.At top cover 1 vibrating sensor is installed, signal by filter, is obtained real-time vibration signal through Numerical Methods such as FFT again.

Will be implemented in reference to figure 1 ~ Fig. 3 and to load ultrasonic wave excitation in the soft abrasive fluid, the utility model has designed corresponding charger.Its device comprises that constraint runner base 3(is workpiece to be processed), top cover 1, constraints module 2, supersonic generator and transducing head thereof.

The constraint runner, workpiece is carried out Precision Machining through entering constrained flow road 6 behind the turbulent flow generator 5 from round entrance 4 inflows behind the hydraulic pump after the speed governing of abrasive Flow process, flow out from round exit 7 and return the abrasive Flow retracting device.

When abrasive Flow was flowed through constraint runner 6, ultrasonic wave excitation was carried on the soft abrasive fluid by constraints module 2.Constraints module 2 is comprised of slave part and the middle oscillating component of periphery, and they are linked to each other by soft fixed tissue 9.Hole part in the middle of the extended top cover 1 in middle vibrating mass 8 tops links to each other with the supersonic generator of outside.

Oscillating component can according to different runners, load several oscillators in different Position Design in the middle of the constraints module.Simultaneously also can be according to different abrasive Flow, different needs load the ultrasonic vibration of different frequency, to reach best processing effect.

In the present embodiment, the fluid governing equation is as follows:

Continuity equation: $\frac{\∂\mathrm{\ρ}}{\∂t}+\frac{\∂}{{\∂x}_j}\left({\mathrm{\ρu}}_j\right)=0---\left(1\right)$ The equation of momentum: $\frac{\∂}{\∂t}\left({\mathrm{\ρu}}_i\right)+\frac{\∂}{{\∂x}_j}\left({\mathrm{\ρu}}_j{u}_i\right)=-\frac{\∂p}{{\∂x}_i}+\frac{\∂}{{\∂x}_j}\left[\mathrm{\μ}(\frac{{\∂u}_j}{{\∂x}_i}+\frac{{\∂u}_i}{{\∂x}_j})\right]-\frac{2}{3}\frac{\∂}{{\∂x}_i}\left(\mathrm{\μ}\frac{{\∂u}_j}{{\∂x}_j}\right)+{\mathrm{\ρg}}_i---\left(2\right)$ In the k-ε model, the transport equation of k and ε is as follows:

$\frac{\∂}{\∂t}\left(\mathrm{\ρk}\right)+\frac{\∂}{{\∂x}_j}\left({\mathrm{\ρ}\stackrel{\‾}{u}}_{j}k\right)=\frac{\∂}{{\∂x}_{\text{j}}}\left[(\mathrm{\μ}+\frac{{\mathrm{\μ}}_t}{{\mathrm{\σ}}_k})\frac{\∂k}{{\∂x}_j}\right]+{\mathrm{\μ}}_t(\frac{{\∂\stackrel{\‾}{u}}_i}{{\∂x}_k}+\frac{{\∂\stackrel{\‾}{u}}_k}{{\∂x}_i})\frac{{\∂\stackrel{\‾}{u}}_i}{{\∂x}_k}-\mathrm{\ρ\ϵ}---\left(3\right)$

$\frac{\&PartialD;}{\&PartialD;t}\left(\mathrm{\&rho;\&epsiv;}\right)+\frac{\&PartialD;}{{\&PartialD;x}_j}\left(\mathrm{\&rho;}{\stackrel{\&OverBar;}{u}}_j\mathrm{\&epsiv;}\right)=\frac{\&PartialD;}{{\&PartialD;x}_j}\left[(\mathrm{\&mu;}+\frac{{\mathrm{\&mu;}}_t}{{\mathrm{\&sigma;}}_{\mathrm{\&epsiv;}}})\frac{\&PartialD;\mathrm{\&epsiv;}}{{\&PartialD;x}_j}\right]+{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA00002129150100011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1\mathrm{\&rho;E\&epsiv;}-{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA00002129150100011.png"\; state="\{\{state\}\}">C</figure-callout>}}_2\mathrm{\&rho;}\frac{{\mathrm{\&epsiv;}}^2}{k+\sqrt{\mathrm{v\&epsiv;}}}---\left(4\right)$

The partial parameters empirical value is: C ₂=1.9; ${\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA00002129150100011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1=\max [0.43,\frac{\mathrm{\&eta;}}{\mathrm{\&eta;}+5}];$ σ _k=1.0σ _ε=1.2，； $\mathrm{\&eta;}={({2E}_{\mathrm{ij}}\&CenterDot;E_{\mathrm{ij}})}^{1/2}\frac{k}{\mathrm{\&epsiv;}};$ $E=\frac{1}{2}(\frac{{\&PartialD;u}_i}{{\&PartialD;x}_j}+\frac{{\&PartialD;u}_j}{{\&PartialD;x}_i});$

In the formula, t is the time; ρ is fluid density; x _i, x _jBe the tensor coordinate; u _iBe the component of velocity u at three change in coordinate axis direction; μ _tBe coefficient of eddy viscosity; μ is fluid dynamic viscosity; E is strain rate; σ _k, σ _εBe respectively tubulence energy and Prandtl number corresponding to tubulence energy dissipative shock wave.

The described content of this specification embodiment only is that the part of utility model design institute way of realization is enumerated; protection domain of the present utility model should only not be confined to the concrete form that embodiment states, protection domain of the present utility model reaches in those skilled in the art according to the thinkable equivalent technologies means of technical conceive of the present utility model.

Claims (3)

1. soft abrasive fluid processing unit (plant) that loads ultrasonic wave excitation, comprise constraint runner base and constraints module, described constraints module is positioned at the top of described constraint runner base, be formed for the constraint runner that the confession soft abrasive flows through between described constraints module and the described constraint runner base, the import of described constraint runner links to each other with the hydraulic pressure delivery side of pump, it is characterized in that: on the described constraints module vibrating mass is installed, described vibrating mass is connected with supersonic generator, vibrating sensor in order to the monitoring vibration signal value is installed on the described constraints module, at the entrance and exit place of constraint runner difference setting pressure sensor, flowmeter is installed in the exit; Described device also comprises in order to vibration signal, pressure signal and flow signal input fluid governing equation with Real-Time Monitoring, input speed by control pump and the frequency of supersonic generator are controlled the polishing controller of the fluidised form of soft abrasive fluid in real time, and described vibrating sensor, pressure sensor and flowmeter are connected with described polishing controller and are connected.

2. the soft abrasive fluid processing unit (plant) of loading ultrasonic wave excitation as claimed in claim 1 is characterized in that: top cover is installed in described constraints module top, and described top cover is fixedly connected with described constraint runner base.

3. the soft abrasive fluid processing unit (plant) of loading ultrasonic wave excitation as claimed in claim 1 or 2, it is characterized in that: described vibrating mass is vibrating head, and described vibrating head is positioned at the middle part of constraints module, described vibrating head and constraints module are by soft fixed tissue-welding.

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