CN210756769U - Magnetorheological fluid circulating system of magnetorheological polishing machine tool - Google Patents
Magnetorheological fluid circulating system of magnetorheological polishing machine tool Download PDFInfo
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- CN210756769U CN210756769U CN201920937722.8U CN201920937722U CN210756769U CN 210756769 U CN210756769 U CN 210756769U CN 201920937722 U CN201920937722 U CN 201920937722U CN 210756769 U CN210756769 U CN 210756769U
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- 239000012530 fluid Substances 0.000 title claims abstract description 261
- 238000005498 polishing Methods 0.000 title claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 54
- 238000003860 storage Methods 0.000 claims abstract description 48
- 230000007423 decrease Effects 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000000725 suspension Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
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- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a magnetic current becomes polishing lathe magnetic current becomes liquid circulation system, include: the device comprises a liquid storage tank, a first peristaltic pump and a variable-diameter back pressure pipeline; one end of the first peristaltic pump is connected with the liquid storage tank, the other end of the first peristaltic pump is connected with the reducing back pressure pipeline, and the tail end of the reducing back pressure pipeline is connected with a nozzle; the nozzle is aligned with the polishing wheel; the reducing back pressure pipeline is provided with a pulse damper, and the diameter of the reducing back pressure pipeline gradually decreases from large to small and then gradually increases. The pulse damper is used for eliminating large-scale flow fluctuation, and the reducing backpressure pipeline is used for further eliminating small-scale magnetorheological flow pulses, so that the magnetorheological fluid flow is stable, and the control precision is high even under the low-flow working condition.
Description
Technical Field
The utility model relates to an optics processing technology field, more specifically the saying so relates to a magnetic current becomes polishing lathe magnetic current becomes liquid circulation system.
Background
As a novel advanced optical manufacturing technology, the magneto-rheological polishing technology has the advantages of high efficiency, high precision, high surface quality, small subsurface damage, small surface residual stress and the like which are incomparable with a series of traditional processing methods, has good application prospect, and can lead the manufacturing level and the production efficiency of optical enterprises to be improved in a breakthrough way. The magnetorheological polishing technology is widely applied to the aspects of continuous phase plate element processing, low-defect surface processing, high-efficiency surface shape error convergence, ultra-smooth surface processing and the like.
The magnetorheological fluid circulating system is a key part of a magnetorheological polishing machine tool and is used for conveying magnetorheological fluid for a polishing wheel of the magnetorheological polishing machine tool to realize continuous and stable polishing of elements. The key technical indexes of the magnetorheological fluid circulating system are that the flow and the viscosity of the magnetorheological fluid are kept stable in the circulating conveying process of the magnetorheological fluid, and the fluctuation is reduced as much as possible. The traditional magnetorheological fluid circulating system adopts a configuration of a centrifugal pump and a first peristaltic pump, namely, the magnetorheological fluid is pumped out of a liquid storage tank by the centrifugal pump (generally named as a transfer pump according to application in the circulating system) and is conveyed into a polishing wheel of a magnetorheological machine tool along a pipeline; then, a first peristaltic pump (generally named as a recovery pump according to the application in a circulating system) is adopted to suck the magnetorheological fluid from the polishing wheel into a liquid storage tank along a pipeline, and one circulation is completed. The configuration of the magnetorheological fluid circulating system has the following defects: 1) because the liquid output flow of the centrifugal pump is sensitive to the height difference between the liquid inlet and the liquid outlet, the small change of the height difference can cause larger fluctuation of the flow, and the polishing wheel can change continuously in the height direction in the machining of the magnetorheological machine tool, so that the flow of the magnetorheological liquid output by the centrifugal pump is changed continuously; 2) although the centrifugal pump is used for continuously outputting liquid, the flow transmitted in the actual operation process still fluctuates, although the magnetorheological machine tool adopts the magnetic flow valve to control the output flow, the problems cannot be completely solved, and the flow fluctuation in the actual operation process of the machine tool is still maintained between 10 ml/min and 40 ml/min. When the magneto-rheological machine tool is in a large-flow working state, the relative error of the deviation is small, the magneto-rheological removal function can still be maintained stable, and the polishing has high convergence precision; however, when a magnetorheological machine tool is used for machining small structural elements such as continuous phase plate elements with complex configurations, a removal function with very small size is needed, the flow of the circulating system needs to be controlled in a low-flow state (the flow is less than 400ml/min), and the flow control precision of the magnetorheological fluid circulating system with the traditional configuration is difficult to meet the requirement, so that the removal function is irregular in shape, the removal efficiency is large in fluctuation, and the precision and the efficiency of magnetorheological machining are influenced.
Therefore, how to overcome the problem of insufficient flow control stability of the magnetorheological fluid circulating system under the low-flow working condition of the magnetorheological polishing machine tool is a problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a magnetorheological suspensions polishing lathe magnetorheological suspensions circulation system of magnetorheological suspensions low flow high accuracy realizes the high stability control of magnetorheological suspensions flow to improve the precision and the efficiency of magnetorheological polishing.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a magnetorheological fluid circulating system of a magnetorheological polishing machine tool comprises: the liquid storage pot still includes: the first peristaltic pump and the variable-diameter back pressure pipeline;
one end of the first peristaltic pump is connected with the liquid storage tank, the other end of the first peristaltic pump is connected with the reducing back pressure pipeline, and the tail end of the reducing back pressure pipeline is connected with a nozzle; the nozzle is aligned with the polishing wheel;
the reducing back pressure pipeline is provided with a pulse damper, and the diameter of the reducing back pressure pipeline gradually decreases from large to small and then gradually increases.
Preferably, the method further comprises the following steps: the recovery device, the first pipe diameter magnetorheological fluid pipe IV, the second peristaltic pump and the first pipe diameter magnetorheological fluid pipe V;
the recoverer is installed on the polishing wheel and sequentially connected with the fourth first-pipe-diameter magnetorheological fluid pipe, the second peristaltic pump, the fifth first-pipe-diameter magnetorheological fluid pipe and the liquid storage tank.
Preferably, the reducing back pressure pipeline comprises a first pipe diameter magnetorheological fluid pipe, a second pipe diameter magnetorheological fluid pipe, a first pipe diameter magnetorheological fluid pipe, a third pipe diameter magnetorheological fluid pipe, a second pipe diameter magnetorheological fluid pipe and a third pipe diameter magnetorheological fluid pipe which are sequentially connected;
the first magnetorheological fluid pipe with the first pipe diameter is connected with the other end of the first peristaltic pump; the first pipe diameter magnetorheological fluid pipe three-way pressure sensor is connected with the nozzle;
the pulse damper is arranged between the first pipe diameter magnetorheological fluid pipe I and the second pipe diameter magnetorheological fluid pipe II;
the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are equal and are sequentially larger than the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the third pipe diameter magnetorheological fluid pipe; and the pipe diameter of the third pipe diameter magneto-rheological fluid pipe is smaller than the pipe diameters of the second pipe diameter magneto-rheological fluid pipe and the first pipe diameter magneto-rheological fluid pipe in sequence.
Preferably, a magnetic flow valve and a flowmeter are arranged between the second pipe diameter magnetorheological fluid pipe II and the first pipe diameter magnetorheological fluid pipe III.
Preferably, the first pipe diameter magnetorheological fluid pipe I, the second pipe diameter magnetorheological fluid pipe II, the third pipe diameter magnetorheological fluid pipe III, the fourth pipe diameter magnetorheological fluid pipe IV and the fifth pipe diameter magnetorheological fluid pipe V have the same pipe diameter;
the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are the same; and the pipe diameter of the first second pipe diameter magnetorheological fluid pipe is equal to the average value of the pipe diameter of the first pipe diameter magnetorheological fluid pipe and the pipe diameter of the third pipe diameter magnetorheological fluid pipe.
Preferably, the pipe diameters of the first pipe diameter magnetorheological fluid pipe I, the first pipe diameter magnetorheological fluid pipe II, the first pipe diameter magnetorheological fluid pipe III, the first pipe diameter magnetorheological fluid pipe IV and the first pipe diameter magnetorheological fluid pipe V are 10-12 mm or 6-8 mm;
the pipe diameter of the third pipe diameter magnetorheological fluid pipe is 3-4 mm.
Preferably, the liquid storage tank is also provided with a thermometer, a motor and a pulse micro pump;
wherein the pulse micro pump is connected with a water replenishing tank; the water replenishing tank pumps deionized water into the liquid storage tank through a pulse micro pump;
the thermometer measures the temperature in the liquid storage tank;
the motor drives the stirring blade to rotate to stir and slide the magnetorheological fluid in the liquid storage tank.
Preferably, the second peristaltic pump is positioned below the recuperator.
Preferably, a magnetorheological output port is arranged at the center of the bottom of the liquid storage tank; the first peristaltic pump pumps magnetorheological fluid out of the magnetorheological output port and enters the first magnetorheological fluid pipe with the first pipe diameter.
Preferably, the third pipe diameter magnetorheological fluid pipe is bent back in the height direction.
Known via foretell technical scheme, compare with prior art, the utility model discloses a magnetorheological suspensions circulation system of magnetic current becomes polishing lathe has following technological effect:
1. the configuration of the double peristaltic pumps and the pulse damper is adopted, and meanwhile, a pipeline reducing back pressure method is combined, the flow fluctuation error of the magnetorheological fluid is reduced to 1-5 ml/min from the traditional 10-40 ml/min, the high-stability control of the magnetorheological fluid circulating system is realized, and the circulating system still has good flow stability control capability under the working condition of low flow of the magnetorheological fluid. Therefore, the magnetorheological fluid circulating system of the magnetorheological polishing machine, provided by the utility model, is particularly suitable for controlling the magnetorheological fluid with high stability under the working condition of low flow.
2. When machining curved optical elements, the polishing wheel will change continuously in the height direction. And the utility model provides a polishing wheel is insensitive at the direction of height change in the circulation system to magnetorheological suspensions machine tool machining, and magnetorheological suspensions flow can hardly change, has guaranteed the stability of the function of getting rid of in the course of working, consequently, this circulation system is applicable to curved surface optical element processing equally.
3. The output of the magnetorheological fluid is carried out by pumping the magnetorheological fluid from the center of the bottom of the liquid storage tank. Because the position in the liquid storage tank, which is just below and is close to the tank bottom, is provided with the stirring blade for rotating, the magnetorheological fluid is continuously stirred and uniformly stirred and is not easy to agglomerate and precipitate, the magnetorheological fluid extracted from the position is not easy to contain precipitated particles, the subsequent pipelines are not easy to be blocked by the particles, and the stability of a circulating system is improved.
4. The magnetorheological fluid is mainly composed of carbonyl iron powder, the density is high, the viscosity is high, the recovery can be completed only by a large suction force, and the recoverer is matched with the polishing wheel in structure and is usually small in size, so that the magnetorheological fluid is easy to block at the recoverer, and the magnetorheological fluid which cannot be recovered splashes to a machine tool workbench from the polishing wheel, so that the element machining is terminated accidentally. The utility model discloses a with the mode increase of putting the second peristaltic pump low with the difference in height of recoverer, rely on magnetorheological suspensions self gravity and utilize liquid siphon effect equivalence to increase the suction of recoverer department for magnetorheological suspensions fully retrieves, has improved circulation system's stability.
To sum up, the utility model provides a magnetorheological polishing lathe magnetorheological suspensions circulation system is applicable to the high accuracy control of magnetorheological lathe magnetorheological suspensions flow, especially also has very high control accuracy under the low flow operating mode, can reduce the fluctuation error of magnetorheological suspensions flow from traditional 10 ~ 40ml/min to 1 ~ 5ml/min, has realized magnetorheological suspensions circulation system's high stability control. The device is simple, convenient, stable and reliable to realize, high in precision and worthy of wide popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the magnetorheological fluid circulating system of the magnetorheological polishing machine tool provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to the attached drawing 1, the embodiment of the utility model discloses a magnetorheological suspensions circulation system of magnetorheological polishing machine, include: the liquid storage pot 3 still includes: a first peristaltic pump 7 and a variable-diameter back pressure pipeline;
one end of the first peristaltic pump 7 is connected with the liquid storage tank 3, the other end is connected with the reducing back pressure pipeline, and the tail end of the reducing back pressure pipeline is connected with the nozzle 18; the nozzle 18 is aligned with the polishing wheel 19;
wherein, be provided with pulse damper 9 in the reducing backpressure pipeline, and the pipe diameter of reducing backpressure pipeline diminishes from big gradually, then grow gradually again. Furthermore, a pulse damper 9 is installed on the large-diameter pipe close to the first peristaltic pump for eliminating large-scale flow fluctuations.
The reducing back pressure pipeline comprises a first pipe diameter magnetorheological fluid pipe I8, a second pipe diameter magnetorheological fluid pipe II 10, a second pipe diameter magnetorheological fluid pipe I11, a third pipe diameter magnetorheological fluid pipe 12, a second pipe diameter magnetorheological fluid pipe II 13 and a third first pipe diameter magnetorheological fluid pipe 16 which are sequentially connected; wherein, the first magnetorheological fluid pipe 8 with the first pipe diameter is connected with the other end of the first peristaltic pump 7; the third magnetorheological fluid pipe 16 with the first pipe diameter is connected with a nozzle 18 through a pressure sensor 17; a pulse damper 9 is arranged between the first pipe diameter magnetorheological fluid pipe I8 and the first pipe diameter magnetorheological fluid pipe II 10;
moreover, the pipe diameters of the first pipe diameter magnetorheological fluid pipe 8 and the second pipe diameter magnetorheological fluid pipe 10 are equal and are sequentially larger than those of the first pipe diameter magnetorheological fluid pipe 11 and the third pipe diameter magnetorheological fluid pipe 12; the pipe diameter of the third pipe diameter magnetorheological fluid pipe 12 is smaller than the pipe diameters of the second pipe diameter magnetorheological fluid pipe 13 and the third pipe diameter magnetorheological fluid pipe 16 in sequence. The pipe diameter of the reducing back pressure pipeline is gradually reduced from large and then gradually increased through three different pipe diameters.
The utility model provides a technical scheme, utilize the pulse damper to eliminate the flow fluctuation of large-scale, magnetorheological suspensions gets into second pipe diameter magnetorheological suspensions pipe 11 along first pipe diameter magnetorheological suspensions pipe two 10, get into third pipe diameter magnetorheological suspensions pipe 12 after that, third pipe diameter magnetorheological suspensions pipe 12 bends and turns back in the direction of height, because this pipeline bore is little, according to bernoulli's law, the bore diminishes, fluidic pressure must increase, magnetorheological suspensions increases sharply in third pipe diameter magnetorheological suspensions pipe 12 pressure, have "backpressure" effect, further eliminate small-scale magnetorheological suspensions flow pulse, make magnetorheological suspensions flow stable, even if also have very high control accuracy under the low flow operating mode, can reduce magnetorheological suspensions flow fluctuation error from traditional 10 ~ 40ml/min to 1 ~ 5 ml/min.
Referring to fig. 1, in order to further optimize the above technical solution, the method further includes, on the basis of the above embodiment: the recovery device 22, the first pipe diameter magnetorheological fluid pipe four 23, the second peristaltic pump 24 and the first pipe diameter magnetorheological fluid pipe five 25;
a recoverer 22 is installed on the polishing wheel 19, and the recoverer 22 is sequentially connected with a first pipe diameter magnetorheological fluid pipe four 23, a second peristaltic pump 24, a first pipe diameter magnetorheological fluid pipe five 25 and a liquid storage tank 3.
In order to further optimize the technical scheme, the first pipe diameter magnetorheological fluid pipe III 16 is connected with the nozzle 18 through the pressure sensor 17.
In order to further optimize the technical scheme, a magneto-rheological valve 14 and a flowmeter 15 are arranged between the second pipe diameter magneto-rheological fluid pipe 13 and the third first pipe diameter magneto-rheological fluid pipe 16.
In order to further optimize the technical scheme, the pipe diameters of the first pipe diameter magnetorheological fluid pipe I8, the first pipe diameter magnetorheological fluid pipe II 10, the first pipe diameter magnetorheological fluid pipe III 16, the first pipe diameter magnetorheological fluid pipe IV 23 and the first pipe diameter magnetorheological fluid pipe V25 are the same;
the pipe diameters of the first pipe diameter magnetorheological fluid pipe 11 and the second pipe diameter magnetorheological fluid pipe 13 are the same; and the pipe diameter of the first magnetorheological fluid pipe 11 with the second pipe diameter is equal to the average value of the pipe diameter of the first magnetorheological fluid pipe 8 with the first pipe diameter and the pipe diameter of the third magnetorheological fluid pipe 12 with the third pipe diameter.
The utility model provides a reducing backpressure pipeline's characteristics are: the pipe diameter changes from big to small and then from small to big, the transition of the pipelines with different pipe diameters needs to be even and smooth, and the pipe diameter difference cannot be too large.
The diameter of the third-pipe-diameter magnetorheological fluid pipe 12 is preferably 3-4 mm, the pipe diameter of the pipeline is too large, the backpressure effect cannot be achieved, and if the pipe diameter is less than 3mm, the pipeline is easily blocked due to inevitable solid particles in the magnetorheological fluid; the pipe diameter of the second pipe diameter magnetorheological fluid pipe is preferably close to the average value of the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the third pipe diameter magnetorheological fluid pipe; the pipe diameter of the first pipe diameter magnetorheological fluid pipe is selected according to the flow required by the circulating system, when the flow of the system is more than 800ml/min, the pipe diameter of the first pipe diameter magnetorheological fluid pipe is preferably 10-12 mm, and when the flow of the system is less than 800ml/min, the pipe diameter of the first pipe diameter magnetorheological fluid pipe is preferably 6-8 mm; pipelines with various pipe diameters are connected through a quick-connection connector, and the total pressure of the pipelines is preferably kept at 30-45 Kpa.
In a circulation system, the back pressure pipeline section, namely, the reference numbers 10-13 in the attached figure 1, the pipeline length of the first pipe diameter magnetorheological fluid pipe accounts for about 10%, the pipeline length of the second pipe diameter magnetorheological fluid pipe accounts for about 15%, and the pipeline length of the third pipe diameter magnetorheological fluid pipe accounts for about 75%. The pipe of the non-back pressure pipe section only plays a role in conveying liquid, the length is not limited, and the pipe is convenient to connect according to the structural size of a machine tool.
In order to further optimize the technical scheme, a thermometer 2, a motor 1 and a pulse micro-pump 5 are further arranged on the liquid storage tank 3;
wherein, the pulse micro pump 5 is connected with a water replenishing tank 6; the water supplementing tank 6 pumps the deionized water into the liquid storage tank 3 through the pulse micro pump 5;
the thermometer 2 measures the temperature in the liquid storage tank 3;
the motor 1 drives the stirring blade 4 to rotate to stir and smooth the magnetorheological fluid in the liquid storage tank 3.
The temperature meter 2, the liquid storage tank 3, the pulse micro pump 5 and the water replenishing tank 6 form a magneto-rheological fluid concentration control subsystem. In the flowing process of the magnetorheological fluid in a circulating system, due to the heating of a rotating part, the friction of a magnetorheological fluid pipeline and the like, the moisture of the magnetorheological fluid can volatilize and dissipate, the temperature in the liquid storage tank 3 is measured in real time through the thermometer 2, a cooling water copper pipe disc is arranged in the liquid storage tank to control the temperature of the magnetorheological fluid, and the temperature of the magnetorheological fluid is controlled to be constant; meanwhile, deionized water in the water replenishing tank 6 is pumped into the liquid storage tank 3 through the pulse micro pump 5 to keep the concentration of the magnetorheological fluid constant.
To further optimize the solution described above, the second peristaltic pump 24 is positioned below the recuperator 22.
The utility model discloses a with the 24 mode increase of putting of second peristaltic pump and the difference in height of recoverer 22, rely on magnetorheological suspensions self gravity and utilize liquid siphon effect equivalence to increase the suction of recoverer 22 department for magnetorheological suspensions fully retrieves, has improved circulation system's stability.
In order to further optimize the technical scheme, a magnetorheological output port is arranged at the center of the bottom of the liquid storage tank 3; the magnetorheological fluid is pumped out from the magnetorheological output port by the first peristaltic pump 7 and enters the first pipe diameter magnetorheological fluid pipe I8.
The utility model discloses a mode of taking magnetorheological suspensions out from 3 bottom central points of liquid storage pot puts carries out magnetorheological suspensions's output, because under in the liquid storage pot close the tank bottom position and have stirring vane 4 rotatory, constantly stir smooth magnetorheological suspensions, the magnetorheological suspensions of this position is difficult for agglomerating, deposit, extracts magnetorheological suspensions from this position and is difficult for containing the sediment granule, follow-up pipeline is difficult to take place the granule and blocks up, has improved circulation system's stability.
The following is combined with the working principle of the magnetorheological fluid circulating system of the magnetorheological polishing machine tool provided by the utility model to explain the technical scheme of the utility model in further detail.
Pouring the fully stirred magnetorheological fluid into the liquid storage tank 3, starting the motor 1 to drive the stirring blade 4 to rotate, stirring and stirring the magnetorheological fluid in the liquid storage tank 3 on line, and preventing the magnetorheological fluid from precipitating; starting a first peristaltic pump 7 (which is also named as a transfer pump according to the application) to pump out the magnetorheological fluid from the bottom of the liquid storage tank 3 and enter a magnetorheological fluid pipe I8 with a first pipe diameter; because the peristaltic pump is a discontinuous positive displacement pump, severe flow pulse exists, the flow fluctuation of magnetorheological fluid is obvious, and stable control cannot be realized, therefore, the pulse damper 9 is adopted to eliminate the flow fluctuation with large scale, then the magnetorheological fluid enters the first magnetorheological fluid pipe 11 with the second pipe diameter along the second magnetorheological fluid pipe 10 with the first pipe diameter, then enters the third pipe diameter magnetorheological fluid pipe 12, and the third pipe diameter magnetorheological fluid pipe 12 bends and folds back in the height direction. Then, magnetorheological fluid enters the magnetorheological valve 14 along the magnetorheological fluid pipe II 13 with the second pipe diameter, the magnetorheological valve 14 is used for controlling the flow of the magnetorheological fluid, the matching of the actual flow and the target set value is ensured, and the relative deviation between the target set value and the actual flow value is usually required to be less than 2%; then the magnetorheological fluid enters a flowmeter 15, and the flow of the magnetorheological fluid in the pipeline is measured; then the magnetorheological fluid enters a third magnetorheological fluid pipe 16 with a first pipe diameter and then enters a pressure sensor 17 to measure the fluid pressure of a pipeline at the tail end of the circulating system, then the magnetorheological fluid enters a nozzle 18, the magnetorheological fluid is sprayed on the surface of the polishing wheel 19 under larger pressure due to the small caliber of the nozzle, the magnetorheological fluid is adsorbed by a strong magnetic field inside the polishing wheel 19 and rotates along with the polishing wheel, the lower surface of the polishing wheel 19 is in contact with the surface of the processed optical element 20 in the rotating process of the polishing wheel 19, and the processing of the optical element 20 is finished based on the bigham effect of the magnetorheological fluid; and then collecting the magnetorheological fluid through a recoverer 22 above the polishing wheel 19, and sucking the magnetorheological fluid into the liquid storage tank 3 through a second peristaltic pump 24 (which is also named as a recovery pump according to the application) along a magnetorheological fluid pipe four 23 with a first pipe diameter and a magnetorheological fluid pipe five 25 with a first pipe diameter to complete the circulation of the magnetorheological fluid.
The technical solution of the present invention will be further explained by combining the specific embodiments provided by the present invention.
The first concrete example is as follows: when the flow of the magnetorheological fluid circulating system is less than 800 ml/min:
The first peristaltic pump 7 is used for flow output, and in order to restrain flow fluctuation and require high flow output stability, a high-precision peristaltic pump is adopted, the flow range of the peristaltic pump is 1.7-2900 ml/min, the rotating speed is 1-600 rpm, and the high-certainty flow conveying precision is achieved. The first magnetorheological fluid pipe 8 with the first pipe diameter adopts a PU pipe with the phi of 8mm, and the PU pipe is characterized in that the inner pipe wall is smooth and wear-resistant, and the magnetorheological fluid flows conveniently. The pulse damper 9 is a film damper, the internal volume of the pulse damper is 190ml, the maximum allowable pressure is 4.3bar, the pulse damper is used for inhibiting flow fluctuation pulses generated by the first peristaltic pump 7, large-size flow fluctuation pulses can be removed by the pulse damper, and primary smoothing of the magnetorheological fluid is realized.
The second magnetorheological fluid pipe 10 with the first diameter adopts a PU pipe with phi 8mm, the first magnetorheological fluid pipe 11 with the second diameter adopts a PU pipe with phi 6mm, and the two pipes are connected through a quick connector. The third pipe diameter magnetorheological fluid pipe 12 is a PU pipe with phi 4mm, the second pipe diameter magnetorheological fluid pipe 13 is a PU pipe with phi 6mm, the third pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are connected through a quick connector, and the part is called a variable diameter backpressure pipeline. The length of the magnetorheological fluid pipe 12 with the third pipe diameter is about 2m, the magnetorheological fluid pipe with the third pipe diameter is too short to play a role in back pressure smoothing, and the magnetorheological fluid pipe with the third pipe diameter is too long to cause large pressure loss of the pipeline and precipitation of the magnetorheological fluid.
The pulse damper 9 and the variable-diameter backpressure pipeline are used for eliminating the flow pulse of the magnetorheological fluid and controlling the flow of the magnetorheological fluid at high precision, the flow fluctuation of the magnetorheological fluid is only 1-5 ml/min generally after the magnetorheological fluid passes through the magnetorheological valve 14 and the flowmeter 15, the precision is high, and the magnetorheological fluid has obvious advantages compared with a traditional structure especially under the working condition of low flow (the flow is less than 400 ml/min).
The recoverer 22, the first pipe diameter magnetorheological fluid pipe four 23, the second peristaltic pump (recovery pump) 24 and the first pipe diameter magnetorheological fluid pipe five 25 are called as a magnetorheological fluid recovery subsystem. For the recovery of the magnetorheological fluid, the requirement on flow conveying stability is not met, but a large suction force is required, so that the second peristaltic pump (recovery pump) 24 adopts a large suction force peristaltic pump, the flow range is 0.4-8.0L/min, the rotating speed is 10-600R/min, the installation position of the second peristaltic pump (recovery pump) 24 is lower than that of the polishing wheel 19 and is about 800mm, the suction force at the recoverer 22 is equivalently increased by depending on the self gravity of the magnetorheological fluid and utilizing the liquid siphon effect, the magnetorheological fluid is fully recovered, and the blockage of the recoverer 22 is prevented.
Through the experiment, the utility model provides a magnetorheological suspensions polishing machine tool magnetorheological suspensions circulation system has higher magnetorheological suspensions flow stability when flow is less than 800ml/min operating mode, and especially the flow has obvious advantage for traditional mode below 400 ml/min.
Specific example two: when the flow of the magnetorheological fluid circulating system is more than 800 ml/min:
The first peristaltic pump 7 is used for flow output, and is required to have high flow output stability in order to restrain flow fluctuation, and meanwhile, the flow requirement needs to be guaranteed under the working condition of large flow, so that the peristaltic pump is high in precision and large in flow, the flow range of the peristaltic pump is 0.4-8.0 liter/minute, the rotating speed of the peristaltic pump is 10-600 revolutions/minute, and high flow conveying precision is achieved. The first magnetorheological fluid pipe with the first diameter adopts a PU pipe with the phi of 12mm, and the PU pipe is characterized in that the inner pipe wall is smooth and wear-resistant, and the magnetorheological fluid flows conveniently. The pulse damper 9 is a film damper, the internal volume of the pulse damper is 190ml, the maximum allowable pressure is 4.3bar, the pulse damper is used for inhibiting flow fluctuation pulses generated by the first peristaltic pump 7, large-size flow fluctuation pulses can be removed by the pulse damper, and primary smoothing of the magnetorheological fluid is realized.
The second magnetorheological fluid pipe 10 with the first diameter adopts a PU pipe with the phi 12mm, the first magnetorheological fluid pipe 11 with the second diameter adopts a PU pipe with the phi 8mm, and the two pipes are connected through a quick connector. The third pipe diameter magnetorheological fluid pipe 12 is a PU pipe with phi 4mm, the second pipe diameter magnetorheological fluid pipe 13 is a PU pipe with phi 8mm, the third pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are connected through a quick connector, and the third pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are called as variable-diameter back pressure pipelines and play a role in smoothing small-size flow pulse in magnetorheological fluid. The length of the magnetorheological fluid pipe 12 with the third pipe diameter is about 3m, the magnetorheological fluid pipe cannot play a back pressure smoothing role when the length is too short, and the magnetorheological fluid pipe has large pressure loss and precipitation caused by too long.
The pulse damper 9 and the variable-diameter backpressure pipeline are used for eliminating the flow pulse of the magnetorheological fluid and realizing high-precision control of the flow of the magnetorheological fluid, the flow fluctuation of the magnetorheological fluid is only 1-5 ml/min generally after the magnetorheological fluid passes through the magnetorheological valve 14 and the flowmeter 15, the precision is high, and the pulse damper has obvious advantages compared with the traditional structure.
The recoverer 22, the first pipe diameter magnetorheological fluid pipe four 23, the second peristaltic pump (recovery pump) 24 and the first pipe diameter magnetorheological fluid pipe five 25 are called as a magnetorheological fluid recovery subsystem. For the recovery of the magnetorheological fluid, the requirement on flow delivery stability is not met, but a large suction force is required, so that the second peristaltic pump (recovery pump) 24 adopts a large suction force peristaltic pump, the flow range is 0.28-13.2 liters/minute, the rotating speed is 20-600 revolutions/minute, the installation position of the second peristaltic pump (recovery pump) 24 is lower than the polishing wheel 19 and is about 1000mm, the suction force at the recoverer 22 is equivalently increased by depending on the self gravity of the magnetorheological fluid and utilizing the liquid siphon effect, the magnetorheological fluid is fully recovered, and the blockage of the recoverer 22 is prevented.
Through the experiment, the utility model provides a magnetorheological suspensions polishing machine tool magnetorheological suspensions circulation system has higher magnetorheological suspensions flow stability when flow is greater than 800ml/min operating mode.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A magnetorheological fluid circulating system of a magnetorheological polishing machine tool comprises: the liquid storage pot, its characterized in that still includes: the first peristaltic pump and the variable-diameter back pressure pipeline;
one end of the first peristaltic pump is connected with the liquid storage tank, the other end of the first peristaltic pump is connected with the reducing back pressure pipeline, and the tail end of the reducing back pressure pipeline is connected with a nozzle; the nozzle is aligned with the polishing wheel;
the reducing back pressure pipeline is provided with a pulse damper, and the diameter of the reducing back pressure pipeline gradually decreases from large to small and then gradually increases.
2. The magnetorheological fluid circulating system of the magnetorheological finishing machine according to claim 1, further comprising: the recovery device, the first pipe diameter magnetorheological fluid pipe IV, the second peristaltic pump and the first pipe diameter magnetorheological fluid pipe V;
the recoverer is installed on the polishing wheel and sequentially connected with the fourth first-pipe-diameter magnetorheological fluid pipe, the second peristaltic pump, the fifth first-pipe-diameter magnetorheological fluid pipe and the liquid storage tank.
3. The magnetorheological polishing machine tool magnetorheological fluid circulation system according to claim 1, wherein the variable diameter backpressure pipeline comprises a first pipe diameter magnetorheological fluid pipe, a second pipe diameter magnetorheological fluid pipe, a first second pipe diameter magnetorheological fluid pipe, a third pipe diameter magnetorheological fluid pipe, a second pipe diameter magnetorheological fluid pipe and a third first pipe diameter magnetorheological fluid pipe which are connected in sequence;
the first magnetorheological fluid pipe with the first pipe diameter is connected with the other end of the first peristaltic pump; the first pipe diameter magnetorheological fluid pipe three-way pressure sensor is connected with the nozzle;
the pulse damper is arranged between the first pipe diameter magnetorheological fluid pipe I and the second pipe diameter magnetorheological fluid pipe II;
the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are equal and are sequentially larger than the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the third pipe diameter magnetorheological fluid pipe; and the pipe diameter of the third pipe diameter magneto-rheological fluid pipe is smaller than the pipe diameters of the second pipe diameter magneto-rheological fluid pipe and the first pipe diameter magneto-rheological fluid pipe in sequence.
4. The magnetorheological finishing machine magnetorheological fluid circulation system according to claim 3, wherein a magnetorheological valve and a flowmeter are arranged between the second pipe diameter magnetorheological fluid pipe II and the third first pipe diameter magnetorheological fluid pipe.
5. The magnetorheological finishing machine magnetorheological fluid circulation system according to claim 3, wherein the first pipe diameter magnetorheological fluid pipe I, the second first pipe diameter magnetorheological fluid pipe II, the third first pipe diameter magnetorheological fluid pipe III, the fourth first pipe diameter magnetorheological fluid pipe and the fifth first pipe diameter magnetorheological fluid pipe have the same pipe diameter;
the pipe diameters of the first pipe diameter magnetorheological fluid pipe and the second pipe diameter magnetorheological fluid pipe are the same; and the pipe diameter of the first second pipe diameter magnetorheological fluid pipe is equal to the average value of the pipe diameter of the first pipe diameter magnetorheological fluid pipe and the pipe diameter of the third pipe diameter magnetorheological fluid pipe.
6. The magnetorheological polishing machine tool magnetorheological fluid circulation system according to claim 5, wherein the first pipe diameter magnetorheological fluid pipe I, the second pipe diameter magnetorheological fluid pipe II, the third pipe diameter magnetorheological fluid pipe III, the fourth pipe diameter magnetorheological fluid pipe and the fifth pipe diameter magnetorheological fluid pipe have pipe diameters of 10-12 mm or 6-8 mm;
the pipe diameter of the third pipe diameter magnetorheological fluid pipe is 3-4 mm.
7. The magnetorheological finishing machine magnetorheological fluid circulating system according to claim 1, wherein a thermometer, a motor and a pulse micro pump are further arranged on the liquid storage tank;
wherein the pulse micro pump is connected with a water replenishing tank; the water replenishing tank pumps deionized water into the liquid storage tank through a pulse micro pump;
the thermometer measures the temperature in the liquid storage tank;
the motor drives the stirring blade to rotate to stir and slide the magnetorheological fluid in the liquid storage tank.
8. The magnetorheological finishing machine magnetorheological fluid circulation system according to claim 2, wherein the second peristaltic pump is positioned below the recoverer.
9. The magnetorheological polishing machine tool magnetorheological fluid circulating system according to claim 3, wherein a magnetorheological output port is arranged at the center of the bottom of the liquid storage tank; the first peristaltic pump pumps magnetorheological fluid out of the magnetorheological output port and enters the first magnetorheological fluid pipe with the first pipe diameter.
10. The magnetorheological fluid circulating system of the magnetorheological finishing machine according to any one of claims 3 to 6 or 9, wherein the magnetorheological fluid pipe with the third pipe diameter is bent back in the height direction.
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| CN201920937722.8U CN210756769U (en) | 2019-06-20 | 2019-06-20 | Magnetorheological fluid circulating system of magnetorheological polishing machine tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238708A (en) * | 2019-06-20 | 2019-09-17 | 中国工程物理研究院激光聚变研究中心 | A kind of Magnetorheological Polishing lathe magnetorheological fluid circulatory system |
| CN113231964A (en) * | 2021-05-21 | 2021-08-10 | 中国工程物理研究院激光聚变研究中心 | Double-vacuum-pump-body polishing solution recovery device and method |
-
2019
- 2019-06-20 CN CN201920937722.8U patent/CN210756769U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238708A (en) * | 2019-06-20 | 2019-09-17 | 中国工程物理研究院激光聚变研究中心 | A kind of Magnetorheological Polishing lathe magnetorheological fluid circulatory system |
| CN110238708B (en) * | 2019-06-20 | 2024-01-23 | 中国工程物理研究院激光聚变研究中心 | Magnetorheological fluid circulating system of magnetorheological polishing machine tool |
| CN113231964A (en) * | 2021-05-21 | 2021-08-10 | 中国工程物理研究院激光聚变研究中心 | Double-vacuum-pump-body polishing solution recovery device and method |
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