CN104117566B - A kind of three-dimensional modeling apparatus and method - Google Patents
A kind of three-dimensional modeling apparatus and method Download PDFInfo
- Publication number
- CN104117566B CN104117566B CN201310146311.4A CN201310146311A CN104117566B CN 104117566 B CN104117566 B CN 104117566B CN 201310146311 A CN201310146311 A CN 201310146311A CN 104117566 B CN104117566 B CN 104117566B
- Authority
- CN
- China
- Prior art keywords
- fluid medium
- dimensional
- valve
- viscosity
- liquid storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 claims abstract description 203
- 239000007788 liquid Substances 0.000 claims abstract description 105
- 238000003860 storage Methods 0.000 claims abstract description 52
- 238000000465 moulding Methods 0.000 claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 52
- 238000003756 stirring Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000007493 shaping process Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 7
- 238000004064 recycling Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention discloses a kind of three-dimensional modeling apparatus, comprising: molding cavity, valve layer, liquid storage cavity, driving retracting device and control device.The invention also discloses a kind of three-dimensionally shaped method being applied to above-mentioned three-dimensional modeling apparatus, comprising: the three-dimensional envelope curved surface data determining described three-dimensional stereo model according to three-dimensional stereo model to be produced; Calculate each jet orifice in described valve layer according to described three-dimensional envelope curved surface data and need the liquid-column height of injection; Load needed for each valve in described driving retracting device required drive and described valve layer is calculated according to described liquid-column height; Control described driving retracting device to make it to continue to provide described power, and apply described load to respectively each valve described, obtain three-dimensionally shaped product.Three-dimensional modeling apparatus provided by the invention and method, the viscosity that make use of intellectual material fluid media (medium) can with the fast-changing feature of external condition, has that shaping speed is fast, institute's generation model can the advantage such as real-time change.
Description
Technical Field
The invention relates to the technical field of three-dimensional forming, in particular to a three-dimensional forming device and a three-dimensional forming method.
Background
Three-dimensional forming has been widely used in various fields, and the existing three-dimensional forming is mainly realized by the following methods:
1. three-dimensional forming is realized through a traditional machining mode.
For example, a material with strong plasticity is used as a medium, a three-dimensional die is used for generating a required three-dimensional stereo model in a stamping mode, and then, for example, a thin shell piece is formed by stamping a metal or a material with strong plasticity.
2. Three-dimensional forming is realized by a controllable solidification process (including a sintering process) aiming at different media.
For example, an ultraviolet curing adhesive is used as a medium, a layering ultraviolet exposure process is adopted, a vertical section of the three-dimensional model on one axis (such as a Z axis) is layered, layer by layer exposure is carried out, patterns obtained by each layer are different, and finally the three-dimensional model is formed. The forming accuracy depends on the thickness of the laminate. The similar process is that metal solder is deposited in a welding mode, and finally a required three-dimensional model is formed, wherein the model precision depends on the size of a molten drop, and the smaller the molten drop is, the higher the precision is.
Compared with the traditional mechanical processing mode, the controllable curing process has the advantages of material saving, capability of forming a complex model, high forming speed, capability of batch production, low cost and the like. However, in any three-dimensional forming method, once the forming medium is made into a three-dimensional model, if the forming medium needs to be reused, the formed three-dimensional model usually needs to be recycled by smelting, and the like, and then the recycled forming medium can be used, and the forming medium cannot be directly reused.
Therefore, the three-dimensional forming method in the prior art can not realize the direct reuse of the forming medium, and can not change the formed three-dimensional model in real time.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to: provided is a three-dimensional molding device capable of realizing direct reuse of a molding medium.
Another main object of an embodiment of the present invention is to: a method is provided for use with the three-dimensional modeling apparatus that enables direct reuse of the modeling media.
According to one object described above, an embodiment of the present invention provides a three-dimensional molding apparatus, including:
the forming cavity is used for providing a three-dimensional forming space of the fluid medium;
the valve layer is tightly connected with the molding cavity and comprises a plurality of valves and valve supporting bodies arranged among the valves, the valves are fixed through the valve supporting bodies, each valve comprises a fluid medium viscosity control assembly, each fluid medium viscosity control assembly is internally provided with a jet hole, and the fluid medium viscosity control assemblies control the height of fluid media jetted from the jet holes by controlling the viscosity of the fluid media in the jet holes;
the liquid storage cavity is tightly connected with the valve layer and is used for storing fluid media;
the driving recovery device is communicated with the liquid storage cavity and the forming cavity, applies power to the fluid medium in the liquid storage cavity, enables the fluid medium in the liquid storage cavity to obtain kinetic energy required by spraying, absorbs the fluid medium accumulated at the bottom of the forming cavity and conveys the fluid medium into the liquid storage cavity;
the control device is used for acquiring three-dimensional envelope surface data of a three-dimensional model to be manufactured, calculating the height of a liquid column required to be sprayed by each jet hole in the valve layer according to the three-dimensional envelope surface data, calculating the load required by each valve according to the height of the liquid column, and applying the load to each valve respectively; and controlling the driving recovery device to continuously apply power to the fluid medium in the liquid storage cavity so as to dynamically form the three-dimensional model.
Wherein the drive recovery device includes: a pump body, a main recovery channel and a branch recovery channel,
one end of the main recovery channel is connected with the pump body, and the other end of the main recovery channel is connected with the liquid storage cavity;
one end of the branch recovery channel is connected with the pump body, and the other end of the branch recovery channel is connected with the molding cavity; the molding cavity is communicated with the liquid storage cavity through the branch recovery channel, the pump body and the main recovery channel;
the pump body applies power to the fluid medium in the liquid storage cavity through the main recovery channel, so that the fluid medium in the liquid storage cavity obtains kinetic energy required by injection, the fluid medium accumulated at the bottom of the forming cavity is absorbed through the branch recovery channel, and the absorbed fluid medium is transmitted to the liquid storage cavity through the branch recovery channel and the main recovery channel.
The fluid medium viscosity control assembly comprises at least one pair of electrodes for controlling the viscosity of the fluid medium in the assembly, and the fluid medium is electrorheological fluid; or,
the fluid medium viscosity control assembly comprises a magnetic pole for controlling the viscosity of the fluid medium in the assembly, and the fluid medium is magnetorheological fluid; or,
the fluid medium viscosity control assembly is a device for controlling temperature, and the fluid medium is a fluid medium with viscosity changing along with temperature.
Wherein, the three-dimensional forming device still includes: and the diaphragm is covered on the forming cavity and deforms along with the height change of the jet flow liquid column under the impact of the fluid medium so as to form a dynamic and intuitive three-dimensional shape.
Wherein, the three-dimensional forming device still includes: and the stirring device is arranged in the liquid storage cavity and used for stirring the fluid medium in the liquid storage cavity under the control of the control device.
Wherein the cross-sectional shapes of the jet holes are all the same, or partially the same, or completely different.
Wherein, when the fluid medium viscosity control assembly comprises a magnetic pole for controlling the viscosity of jet flow and the fluid medium is magnetorheological fluid, the three-dimensional forming device further comprises: and the magnetic shielding blocks are respectively arranged between the magnetic poles so as to shield the influence of the magnetic field generated by one valve on the viscosity of the fluid medium in other valves.
When the fluid medium is magnetorheological fluid, the three-dimensional forming device further comprises a magnetic shielding body which is arranged on the top surface and/or the bottom surface of the valve layer so as to shield the influence of a magnetic field generated by one valve on the viscosity of the fluid medium in other valves.
According to another object, an embodiment of the present invention further provides a three-dimensional forming method, which is applied to the three-dimensional forming apparatus of claim 1, and the three-dimensional forming method includes:
determining three-dimensional envelope surface data of a three-dimensional model according to the three-dimensional model to be manufactured;
calculating the height of a liquid column to be sprayed by each jet hole according to the three-dimensional envelope surface data;
calculating the load required by each valve according to the height of the liquid column, and applying the load to each valve respectively;
and continuously applying power to the fluid medium in the liquid storage cavity, and dynamically forming the three-dimensional model through the height of the fluid medium liquid column.
The dynamic value of the power continuously applied to the fluid medium in the liquid storage cavity is determined according to the preset value or the height of the liquid column to be jetted by the jet hole.
According to the three-dimensional forming device and the three-dimensional forming method provided by the embodiment of the invention, the characteristic that the viscosity of the fluid medium can be changed rapidly along with the change of external conditions is utilized, and according to the three-dimensional model to be manufactured, the three-dimensional model is dynamically generated by continuously applying power to the fluid medium in the liquid storage cavity and respectively applying different loads to each valve and utilizing the difference of the heights of liquid columns of the fluid medium. The fluid medium can be recovered in real time by driving the recovery device, so that the direct reuse of the forming medium can be realized by applying the invention.
Furthermore, when different loads are applied to the valves, the height of the fluid medium liquid column ejected by each jet hole is changed, so that the three-dimensional model generated by applying the embodiment of the invention can be changed in real time, and the medium does not need to be replaced in the changing process.
Therefore, the device and the method provided by the embodiment of the invention can dynamically display the three-dimensional model, and have the advantages of high forming speed, simple control, reusable forming medium, material saving and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a single jet hole of a three-dimensional modeling apparatus according to a preferred embodiment of the invention;
FIG. 2 is a schematic diagram showing the distribution of jet holes in the three-dimensional molding apparatus shown in FIG. 1;
FIG. 3 is a schematic view showing the structure of a valve in a three-dimensional molding apparatus according to another preferred embodiment of the present invention;
fig. 4 is a schematic view showing a three-dimensional molding method applied to the three-dimensional molding apparatus shown in fig. 1 and 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention utilizes the kinetic energy generated by some fluid media in a jet flow state to form a liquid column with certain height, and utilizes the difference of the heights of the liquid columns to form a three-dimensional model. The three-dimensional model can be dynamically adjusted according to needs, the shape of the top curved surface of the three-dimensional model is changed in real time, and a medium does not need to be replaced in the changing process.
The fluid medium described above has the following properties: the viscosity of the fluid medium can be controlled by external conditions, such as a magnetic field, an electric field, a temperature field and the like, and the viscosity of the fluid medium changes along with the change of the external conditions.
After the viscosity of the fluid medium changes, the flow resistance in the jet hole can also change, the flow resistance is adjusted through the viscosity change of the fluid medium, and the flow resistance is large when the viscosity is large, and the flow resistance is small when the viscosity is small; the liquid column ejected from the jet hole with large flow resistance is lower than that ejected from the jet hole with small flow resistance; thus, a three-dimensional model is dynamically formed by dynamically adjusting the height difference of the liquid column.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a single jet hole of a three-dimensional forming apparatus according to a preferred embodiment of the present invention, including:
a molding cavity 11 providing a molding space for a fluid medium 16;
the viscosity of the fluid medium 16 may be controlled by an external condition, such as a magnetic field, an electric field, a temperature field, etc., and the viscosity of the fluid medium changes with the change of the external condition, for example, the fluid medium may be an electro-rheological fluid or a magneto-rheological fluid, in which:
electrorheological fluid is an intelligent material, which is formed by adding specific nano-scale particles into base fluid and belongs to colloidal solution when no sedimentation occurs. The electrorheological fluid has the property that the viscosity of the electrorheological fluid changes along with the change of the intensity of an external electric field, namely, the viscosity of the electrorheological fluid can be adjusted by the external electric field. The higher the external electric field intensity is, the higher the viscosity of the electrorheological fluid is. That is, the electrorheological fluid is a liquid that can be changed between a liquid state and a solid-like state under the action of an electric field, and can be quickly changed from the liquid state to the solid-like state under the action of the electric field, and can be quickly changed from the solid-like state to the liquid state when the action of the electric field is removed.
The magnetic rheological liquid is also an intelligent material, and is a suspension liquid formed by mixing micro soft magnetic particles with high magnetic conductivity and low magnetic hysteresis and non-magnetic conductive liquid. The suspension liquid presents the Newtonian fluid characteristic of low viscosity under the condition of zero magnetic field; when a magnetic field is applied, the viscosity of the magnetorheological fluid increases with the increase of the magnetic field and finally loses fluidity and becomes solid.
It should be noted that any liquid that can change the viscosity of the fluid medium with the change of the external condition can be applied in the present application, and the present application does not limit the specific carrier of the fluid medium.
The valve layer 12 is tightly connected with the molding cavity 11, the valve layer 12 comprises a plurality of valves 121 and a valve support body 122, and the valves 121 are fixed through the valve support body 122; the valve 121 comprises fluid medium viscosity control assemblies 1212, wherein each fluid medium viscosity control assembly 1212 is internally provided with a jet hole 1211, and the jet hole 1211 is a fluid medium channel in the valve 121; the fluid medium viscosity control assembly 1212 increases the fluid resistance by controlling the viscosity of the fluid medium 16 in the jet orifice 1211 to control the height of the fluid medium 16 ejected from the jet orifice 1211;
each valve can be independently controlled, so the flow resistance in each jet hole can be independently controlled, and the specific control method is the prior art and is not described in detail herein;
in this embodiment, when the fluid medium 16 is an electro-rheological fluid, the fluid medium viscosity control assembly 1212 includes at least one pair of electrodes for controlling the viscosity of the jet; when the fluid medium 16 is a magnetorheological fluid, the fluid medium viscosity control assembly 1212 includes at least one pair of magnetic poles to control the viscosity of the jet.
Taking the fluid medium viscosity control assembly as an electrode and the fluid medium as electrorheological fluid as an example, if the external electric field strength is larger, the electrorheological fluid viscosity is higher, so that the resistance passing through the jet hole is larger, the resistance is larger, and a part of kinetic energy of the jet fluid column is consumed. Together, a plurality of liquid columns with different heights dynamically form a three-dimensional model.
Wherein the valve supporting body 122 is disposed between the valves 121, and is used for forming a support between the valves 121. Furthermore, when electrorheological fluid is used as the fluid medium 16, the valve support 122 in the valve layer is preferably an electrically insulating material. When the fluid medium 16 is a magnetorheological fluid, the valve support 122 in the valve layer is preferably a material with strong magnetic field insulation property, so as to reduce the electromagnetic field interference between the jet holes 1211.
The liquid storage cavity 13 is tightly connected with the valve layer 12 and is used for storing a fluid medium 16;
the driving and recycling device 15 is used for communicating the liquid storage cavity 13 with the molding cavity 11, applying power to the fluid medium 16 in the liquid storage cavity 13 to enable the fluid medium 16 in the liquid storage cavity 13 to obtain kinetic energy required by injection, absorbing the fluid medium 16 accumulated at the bottom of the molding cavity 11 and conveying the fluid medium 16 into the liquid storage cavity 13;
still referring to fig. 1, in a possible embodiment, said drive recovery means 15 comprise a main recovery channel 151, a pump body 152 and a branch recovery channel 153, wherein:
one end of the main recovery channel 151 is connected with the pump body 152, and the other end of the main recovery channel is connected with the liquid storage cavity 13;
the pump body 152 applies power to the fluid medium 16 in the reservoir cavity 13 through the main recovery channel 151, so that the fluid medium 16 in the reservoir cavity 13 obtains kinetic energy required for ejection, absorbs the fluid medium accumulated at the bottom of the molding cavity 11 through the branch recovery channel 153, and transmits the absorbed fluid medium to the reservoir cavity 13 through the branch recovery channel 153 and the main recovery channel 151.
One end of the branch recycling channel 153 is connected with the pump body 152, and the other end of the branch recycling channel is connected with the molding cavity 11; the molding cavity 11 is communicated with the liquid storage cavity 13 through a main recovery channel 151, a pump body 152 and a branch recovery channel 153;
in a preferred embodiment, the pump body 152 is preferably a circulation pump. The outlet pressure of the circulation pump varies with the application requirements and also with the load.
It should be noted that the branch recycling channel 153 may be one or more, for example, two branch recycling channels exist in the embodiment shown in fig. 1, in practical applications, the number of the branch recycling channels depends on specific requirements, and the number of the branch recycling channels is not limited herein.
The control device 17 is configured to obtain three-dimensional envelope surface data of a three-dimensional model to be manufactured, calculate a liquid column height required to be ejected by each jet hole 1211 in the valve layer 12 according to the three-dimensional envelope surface data, calculate a load required by each valve 121 according to the liquid column height, and apply the load to each valve 121 respectively; and controlling the driving recovery device 15 to continuously apply power to the fluid medium in the liquid storage cavity 13 so as to dynamically form the three-dimensional model.
The three-dimensional envelope surface is a three-dimensional monotonic surface, the jet flow direction is taken as a Z axis, the plane of the jet flow hole is an XY surface, the height value sprayed by each jet flow hole on the XY surface is unique, namely, any jet flow hole on a projection surface vertical to the jet flow axis only corresponds to one height point.
Here, the power value for controlling the driving recovery device 15 to continuously apply power to the fluid medium in the liquid storage cavity 13 can be determined by:
one possible way is to determine from a preset;
for example, a power value is predetermined based on empirical values,
another possible mode is that the liquid is determined according to the highest liquid column height required to be sprayed by the jet hole;
for example, if the power value required for the highest liquid column is Fmax, the power value F for continuously applying power to the fluid medium in the liquid storage cavity can be calculated by using the following equation (1):
F＝K*Fmax(1)
k is a coefficient and is not less than 1, and the selection of K can be determined according to specific working condition conditions.
Another possible way is to calculate the power value required by the fluid medium in each jet hole to be ejected to the specified height under the condition of zero field according to the height of the liquid column of each jet hole, the zero-field viscosity of the fluid medium, and the state parameters (such as the length of the hole, the roughness of the inner wall of the hole, the cross-sectional shape of the hole) of each jet hole, take the maximum value Fmax of each calculated power value, and calculate the power value continuously applying power to the fluid medium in the liquid storage cavity by using the above formula (1).
In this way, the power value provided by each driving of the recovery device for different three-dimensional models may be different.
It should be noted that there are various methods for calculating the value of the applied power required to drive the recovery device, and the above are only two possible implementation manners, and the specific calculation manner is not limited herein.
It should be noted that, in the implementation process, the control device 17 may be one physical device or a plurality of physical devices, and the external representation form of the control device is herein limited.
By applying the embodiment shown in fig. 1, the three-dimensional model is dynamically generated by using the difference of the heights of the liquid columns of the fluid medium by continuously applying power to the fluid medium in the liquid storage cavity and respectively applying different loads to the valves. The fluid medium can be recovered in real time by driving the recovery device, so that the direct reuse of the forming medium can be realized by applying the invention, the forming speed is high, and the control is simple.
It should be noted that, when the fluid medium 16 is a magnetorheological fluid, the three-dimensional forming apparatus shown in fig. 1 may further include a plurality of magnetic shielding blocks (not shown in fig. 1) respectively installed between each pair of magnetic poles 1212, for shielding the magnetic field generated by one valve from interfering with the viscosity of the fluid medium 16 in the other valves. In addition, the three-dimensional forming device may further include a magnetic shielding body (not shown in fig. 1) mounted on the bottom surface 123 and/or the top surface 124 of the valve layer to shield the magnetic field generated by one valve from influencing the viscosity of the fluid medium in the other valves. That is, the three-dimensional molding apparatus shown in fig. 1 may include only the magnetic shielding block, only the magnetic shielding body, and both the magnetic shielding block and the magnetic shielding body, and in any case, the number of the magnetic shielding block and the magnetic shielding body is not limited herein.
The materials and application methods of the magnetic shield block and the magnetic shield body are conventional, and will not be described in detail here.
In summary, the fluid medium viscosity control assembly includes at least one pair of electrodes for controlling the viscosity of the fluid medium in the assembly, and the fluid medium is an electrorheological fluid; or the fluid medium viscosity control assembly comprises a magnetic pole for controlling the viscosity of the fluid medium in the assembly, and the fluid medium is magnetorheological fluid; or, the fluid medium viscosity control component is a device for controlling temperature, and in this case, the fluid medium is a fluid medium with viscosity changing with temperature, such as hydraulic oil and the like.
It should be noted that the three-dimensional forming device may further include a diaphragm 18 covering the forming cavity 11, and under the impact of the jet, the diaphragm may change with the height of the jet liquid column to form a dynamic and intuitive three-dimensional shape, so that the diaphragm 18 is usually made of a light, thin and flexible material.
It should be noted that the three-dimensional forming apparatus may further include a stirring device 14 disposed in the liquid storage cavity 13 and used for stirring the fluid medium 16 in the liquid storage cavity 13 under the control of the control device 17. In this case, the control device 17 is also used to control the stirring device 14 periodically or according to the received stirring instructions.
Fig. 2 is a schematic view showing the distribution of the jet holes 1211 in the three-dimensional molding apparatus shown in fig. 1. In the embodiment shown in fig. 2, each jet hole 1211 is circular in cross-section, and the pitch and diameter of each jet hole are equal.
The number of the jet holes 1211, the distribution pitch of the jet holes, and the size of the cross section of each jet hole are not limited. In other possible embodiments, the cross-sectional shapes of the jet holes 1211 may be all the same, may be partially the same, or may be completely different, for example, the cross-sectional shapes of the jet holes may be circular, rectangular, square, irregular, or the like. In addition, some jet holes are close in distance and some jet holes are far in distance, and the jet hole distribution parameters can be adjusted according to different model requirements.
Referring to fig. 3, fig. 3 is a schematic structural view of a valve in a three-dimensional molding apparatus according to another preferred embodiment of the invention. In the embodiment, the feature that the energized coil can generate a magnetic field is utilized, and magnetorheological fluid is used as the fluid medium, compared with the embodiment shown in fig. 1, only the viscosity control assembly of the fluid medium is different, and the other parts are completely the same, and the description of the same contents is not repeated here. Only the fluid medium viscosity control assembly will be described in detail below.
First, as shown in fig. 3, the valve 421 in this embodiment includes a fluid medium viscosity control assembly having at least one magnetic pole for controlling the viscosity of the jet, each magnetic pole including a hollow column 4211 and a coil 4212 wound around the hollow column, the hollow column 4211 having a jet hole 4213 therein, and the valve 421 is used for controlling the viscosity of the magnetorheological fluid 46 in the jet hole 4213.
Fig. 3 is only one possible implementation of the fluid medium viscosity control assembly, and the specific implementation of the fluid medium viscosity control assembly is not limited herein, and any possible implementation may be applied to the present application. Wherein, the valve supporting body 422 is disposed between the valves 421 for forming a support between the valves 421.
Further, the three-dimensional forming device may further include a plurality of magnetic shielding blocks (not shown) respectively installed between the fluid medium viscosity control assemblies for shielding the magnetic field generated by the valve from interfering with the viscosity of the fluid medium 46 in other valves. In addition, the three-dimensional molding device may further include at least one magnetic shield 4214 mounted on the bottom surface 423 and/or the top surface 424 of the valve layer. The choice and design of the magnetic shield is prior art and will not be described in detail here.
An embodiment of the present invention further provides a three-dimensional forming method, which is applied to the three-dimensional forming apparatus shown in fig. 1 or fig. 4, and with reference to fig. 4, the method specifically includes:
step 41, determining three-dimensional envelope surface data of a three-dimensional model according to the three-dimensional model to be manufactured;
for example, three-dimensional envelope surface data of a three-dimensional stereo model is created in software using a 3D scanner.
Here, any method capable of determining the three-dimensional envelope surface data of the three-dimensional stereo model according to the three-dimensional stereo model to be produced may be applied to the present document, and the determination method of the three-dimensional envelope surface data is not limited herein.
42, calculating the height of a liquid column required to be sprayed by each jet hole according to the three-dimensional envelope surface data;
for example, the identification of each jet hole is obtained, the injection height required by each jet hole is calculated according to the three-dimensional envelope surface data of the three-dimensional model, and the identification of each jet hole and the required injection height of each jet hole are correspondingly stored to obtain the height data required to be injected by each jet hole;
here, any method capable of calculating the height of the liquid column to be ejected from each ejection hole based on the three-dimensional envelope surface data may be applied to the present invention, and the present invention is not limited to a specific calculation method.
And 43, calculating the load required by each valve according to the height of the liquid column, and applying the load to each valve respectively.
For example, the resistance of the fluid medium in each valve is calculated according to the height of the liquid column and the power value continuously provided by the driving recovery device, and the load required by each valve is calculated by combining the state parameters (such as the length of the hole, the roughness of the inner wall of the hole, the cross-sectional shape of the hole and the like) of the jet hole and the characteristics (such as the zero-field viscosity of the fluid medium) of the fluid medium; when the recovery device is driven to apply the calculated loads to the valves, for example, when the loads required for the valves 1 and 2 are calculated to be U1 and U2, respectively, the load U1 is applied to the valve 1 and the load U2 is applied to the valve 2.
Here, any method capable of calculating the load required for each valve according to the height of the liquid column may be applied to the present invention, and the specific calculation method is not limited herein.
And step 44, continuously applying power to the fluid medium in the liquid storage cavity, and dynamically forming a three-dimensional model of the three-dimensional product through the height of a fluid medium liquid column.
The value of the power that is continuously applied to the fluid medium in the reservoir may be determined by a number of methods, one possible calculation method being:
according to the height of a liquid column of each jet hole, the zero-field viscosity of the fluid medium and the state parameters (such as the length of the hole, the roughness of the inner wall of the hole, the cross section shape of the hole) of each jet hole, respectively calculating the power value required by the fluid medium in each jet hole to be sprayed to a specified height under the condition of the zero field, taking the maximum value Fmax of each calculated power value, and calculating the power value continuously applying power to the fluid medium in the liquid storage cavity by using the formula (1).
Of course, the specific calculation method is not limited herein, and any possible calculation method can be applied herein.
After the power value of continuously applying power to the fluid medium in the liquid storage cavity is calculated, the driving recovery device continuously applies power to the fluid medium in the liquid storage cavity, and under the coordination of applying different loads to the valves, a three-dimensional model can be dynamically formed.
The three-dimensional model to be created may be changed in real time or at regular times according to different loads applied to the respective valves.
By applying the method, the three-dimensional model is dynamically generated by utilizing the difference of the heights of the liquid columns of the fluid medium by continuously applying power to the fluid medium in the liquid storage cavity and respectively applying different loads to the valves. The fluid medium can be recovered in real time by driving the recovery device, so that the direct reuse of the forming medium can be realized by applying the invention, the forming speed is high, and the control is simple.
In all the embodiments described above, the change of the external condition, such as the change of the electric field or the magnetic field, causes the change of the viscosity of the fluid medium, and in other possible embodiments, the change of the external condition may also cause the change of the viscosity of the fluid medium. The fluid medium according to the embodiments of the present invention should have at least one property that the external condition can control the viscosity change of the fluid medium. For example, the magnetorheological fluid can control the viscosity change thereof through a magnetic field; the electrorheological fluid can control the viscosity change of the electrorheological fluid by an electric field; there are also some fluids whose viscosity changes can be controlled by a temperature field. Any fluid medium that has at least one external condition that changes its viscosity and that returns to its original state after the external condition is removed may be used in embodiments of the present invention. In summary, neither the specific carrier of the external condition nor the specific carrier of the fluid medium is limited, any external condition that can control the viscosity of the fluid medium to change can be applied to the present document, and at the same time, any fluid medium that can generate recoverable viscosity change along with the change of the external condition can be applied to the present document.
The following takes a three-dimensional model of a mountain as an example, and further details the embodiment of the present invention.
The method for displaying the mountain model by using the three-dimensional forming device of fig. 1 may include:
1. establishing a three-dimensional model in software, specifically, establishing the three-dimensional model through structural parameters of the model of the mountain, or establishing the three-dimensional model according to a 3D scanning result, and obtaining three-dimensional envelope surface data of the mountain according to the established three-dimensional model;
2. calculating the height of a liquid column to be sprayed by each jet hole according to the three-dimensional envelope surface data;
for example, the height of the liquid column corresponding to the jet hole a is calculated to be H1, and the height of the liquid column corresponding to the jet hole B is calculated to be H2;
3. calculating the load required by each valve according to the height of the liquid column, and applying the load to each valve respectively;
for example, according to the foregoing calculation method, it is calculated that the voltage to be applied to the jet hole a is U1, and the voltage to be applied to the jet hole B is U2, where U2 has a value greater than U1; then, applying a voltage U1 to the valve corresponding to the jet hole A and applying a voltage U2 to the valve corresponding to the jet hole B; thus, the flow resistance of the jet hole B is large, the height of the liquid column is low, the flow resistance of the jet hole A is small, and the liquid column is high;
4. and continuously applying power to the fluid medium in the liquid storage cavity by the driving recovery device, and dynamically forming the three-dimensional model through the height of a fluid medium liquid column.
According to the technical scheme, the method and the device have the advantages that the viscosity of the intelligent material fluid medium can be changed rapidly along with external conditions, the forming speed is high, the generated model can be changed in real time, and the like.
Since the apparatus embodiments and the method embodiments are very similar, the relevant points can be referred to each other.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A three-dimensional molding apparatus, comprising:
the forming cavity is used for providing a three-dimensional forming space of the fluid medium;
the valve layer is tightly connected with the molding cavity and comprises a plurality of valves and valve supporting bodies arranged among the valves, the valves are fixed through the valve supporting bodies, each valve comprises a fluid medium viscosity control assembly, each fluid medium viscosity control assembly is internally provided with a jet hole, and the fluid medium viscosity control assemblies control the height of fluid media jetted from the jet holes by controlling the viscosity of the fluid media in the jet holes;
the liquid storage cavity is tightly connected with the valve layer and is used for storing fluid media;
the driving recovery device is communicated with the liquid storage cavity and the forming cavity, applies power to the fluid medium in the liquid storage cavity, enables the fluid medium in the liquid storage cavity to obtain kinetic energy required by spraying, absorbs the fluid medium accumulated at the bottom of the forming cavity and conveys the fluid medium into the liquid storage cavity;
the control device is used for acquiring three-dimensional envelope surface data of a three-dimensional model to be manufactured, calculating the height of a liquid column required to be sprayed by each jet hole in the valve layer according to the three-dimensional envelope surface data, calculating the load required by each valve according to the height of the liquid column, and applying the load to each valve respectively; and controlling the driving recovery device to continuously apply power to the fluid medium in the liquid storage cavity so as to dynamically form the three-dimensional model.
2. The three-dimensional molding apparatus according to claim 1, the drive recovery means comprising: a pump body, a main recovery channel and a branch recovery channel,
one end of the main recovery channel is connected with the pump body, and the other end of the main recovery channel is connected with the liquid storage cavity;
one end of the branch recovery channel is connected with the pump body, and the other end of the branch recovery channel is connected with the molding cavity; the molding cavity is communicated with the liquid storage cavity through the branch recovery channel, the pump body and the main recovery channel;
the pump body applies power to the fluid medium in the liquid storage cavity through the main recovery channel, so that the fluid medium in the liquid storage cavity obtains kinetic energy required by injection, the fluid medium accumulated at the bottom of the forming cavity is absorbed through the branch recovery channel, and the absorbed fluid medium is transmitted to the liquid storage cavity through the branch recovery channel and the main recovery channel.
3. The three-dimensional forming apparatus according to claim 1,
the fluid medium viscosity control assembly comprises at least one pair of electrodes for controlling the viscosity of the fluid medium in the assembly, and the fluid medium is electrorheological fluid; or,
the fluid medium viscosity control assembly comprises a magnetic pole for controlling the viscosity of the fluid medium in the assembly, and the fluid medium is magnetorheological fluid; or,
the fluid medium viscosity control assembly is a device for controlling temperature, and the fluid medium is a fluid medium with viscosity changing along with temperature.
4. The three-dimensional forming apparatus according to claim 1,
the three-dimensional molding apparatus further includes: and the diaphragm is covered on the forming cavity and deforms along with the height change of the jet flow liquid column under the impact of the fluid medium so as to form a dynamic and intuitive three-dimensional shape.
5. The three-dimensional forming apparatus of claim 1, further comprising: and the stirring device is arranged in the liquid storage cavity and used for stirring the fluid medium in the liquid storage cavity under the control of the control device.
6. The three-dimensional forming device according to claim 1, wherein the cross-sectional shapes of the jet holes are all the same, or partially the same, or completely different.
7. The three-dimensional forming apparatus according to claim 3, wherein when the fluid medium viscosity control assembly includes a magnetic pole for controlling viscosity of the jet, and the fluid medium is a magnetorheological fluid, the three-dimensional forming apparatus further comprises: and the magnetic shielding blocks are respectively arranged between the magnetic poles so as to shield the influence of the magnetic field generated by one valve on the viscosity of the fluid medium in other valves.
8. The three-dimensional forming device according to claim 3 or 7, wherein when the fluid medium viscosity control assembly comprises a magnetic pole for controlling the viscosity of the jet flow, and the fluid medium is a magnetorheological fluid, the three-dimensional forming device further comprises a magnetic shielding body mounted on the top surface and/or the bottom surface of the valve layer to shield the influence of the magnetic field generated by one valve on the viscosity of the fluid medium in the other valve.
9. A three-dimensional molding method applied to the three-dimensional molding apparatus according to claim 1, the three-dimensional molding method comprising:
determining three-dimensional envelope surface data of a three-dimensional model according to the three-dimensional model to be manufactured;
calculating the height of a liquid column to be sprayed by each jet hole according to the three-dimensional envelope surface data;
calculating the load required by each valve according to the height of the liquid column, and applying the load to each valve respectively;
and continuously applying power to the fluid medium in the liquid storage cavity, and dynamically forming the three-dimensional model through the height of the fluid medium liquid column.
10. The three-dimensional forming method according to claim 9, wherein a power value for continuously applying power to the fluid medium in the liquid storage cavity is determined according to a preset setting or according to a height of a liquid column to be ejected from the ejection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146311.4A CN104117566B (en) | 2013-04-24 | 2013-04-24 | A kind of three-dimensional modeling apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146311.4A CN104117566B (en) | 2013-04-24 | 2013-04-24 | A kind of three-dimensional modeling apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104117566A CN104117566A (en) | 2014-10-29 |
| CN104117566B true CN104117566B (en) | 2016-04-27 |
Family
ID=51763330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310146311.4A Expired - Fee Related CN104117566B (en) | 2013-04-24 | 2013-04-24 | A kind of three-dimensional modeling apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104117566B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260394B (en) * | 2021-11-18 | 2024-03-26 | 格利纳(青岛)医疗器械有限公司 | Titanium clip forming machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09168828A (en) * | 1995-12-21 | 1997-06-30 | Sky Alum Co Ltd | Superplastic forming method and forming device therefor |
| JP2003236627A (en) * | 2002-02-19 | 2003-08-26 | Honda Motor Co Ltd | Sequential forming method |
| EP1935639A2 (en) * | 2006-12-22 | 2008-06-25 | Palo Alto Research Center Incorporated | An improved method of forming a reconfigurable relief surface using an electrorheological fluid |
| CN101391277A (en) * | 2008-11-19 | 2009-03-25 | 宁波工程学院 | Water-jet multi-point quick forming method of plate parts and multi-point forming machine |
| CN201244624Y (en) * | 2008-08-18 | 2009-05-27 | 吉林大学 | Sectional type multi-point shape adjusting device for three-dimensional curve generation of sheet material |
| CN102205366A (en) * | 2010-11-15 | 2011-10-05 | 吉林大学 | Flexible stretch-forming device capable of reconstructing one-way continuous die surface |
| CN102985199A (en) * | 2010-06-09 | 2013-03-20 | 松下电器产业株式会社 | Method for producing three-dimensionally shaped structure, three-dimensionally shaped structure obtained by same, and method for producing molded article |
-
2013
- 2013-04-24 CN CN201310146311.4A patent/CN104117566B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09168828A (en) * | 1995-12-21 | 1997-06-30 | Sky Alum Co Ltd | Superplastic forming method and forming device therefor |
| JP2003236627A (en) * | 2002-02-19 | 2003-08-26 | Honda Motor Co Ltd | Sequential forming method |
| EP1935639A2 (en) * | 2006-12-22 | 2008-06-25 | Palo Alto Research Center Incorporated | An improved method of forming a reconfigurable relief surface using an electrorheological fluid |
| CN201244624Y (en) * | 2008-08-18 | 2009-05-27 | 吉林大学 | Sectional type multi-point shape adjusting device for three-dimensional curve generation of sheet material |
| CN101391277A (en) * | 2008-11-19 | 2009-03-25 | 宁波工程学院 | Water-jet multi-point quick forming method of plate parts and multi-point forming machine |
| CN102985199A (en) * | 2010-06-09 | 2013-03-20 | 松下电器产业株式会社 | Method for producing three-dimensionally shaped structure, three-dimensionally shaped structure obtained by same, and method for producing molded article |
| CN102205366A (en) * | 2010-11-15 | 2011-10-05 | 吉林大学 | Flexible stretch-forming device capable of reconstructing one-way continuous die surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104117566A (en) | 2014-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10974442B2 (en) | Set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field | |
| CN109049674B (en) | Additive manufacturing device and method for microsystem three-dimensional structure | |
| CN108057883B (en) | Method and device for realizing powder compaction by radial and axial electromagnetic force | |
| CN106141184B (en) | Multi-functional selective laser melting shapes SLM substrate levelling devices | |
| CN108367487A (en) | Method for the silicone elastomer product for producing print quality raising | |
| Wei et al. | Development and modeling of melt electrohydrodynamic-jet printing of phase-change inks for high-resolution additive manufacturing | |
| CN103911678A (en) | Coaxial nozzle for electrofluid spray printing | |
| CN112122614B (en) | Self-excitation electrostatic field-driven spray deposition-based 3D printing device, working method and application thereof | |
| CN103769461B (en) | A kind of method and device making the indirect microsecond delay of sheet material based on electromagnetic force driving | |
| CN105108153A (en) | Magnetizing type 3D cold printing device for magnetic materials | |
| EP2998059A1 (en) | Method for the three-dimensional printing of an item made of metallic material and apparatus for performing the method | |
| CN104117566B (en) | A kind of three-dimensional modeling apparatus and method | |
| CN204640805U (en) | A kind of quick detach platform based on FDM technology 3D printer | |
| CN203637190U (en) | Controllable type three-dimensional electrostatic spinning printing device | |
| Meng et al. | Performance characterisation and printing parameter modelling of selective laser melting printed capillary wicks | |
| Feng et al. | Analysis of the bulging process of an AZ31B magnesium alloy sheet with a uniform pressure coil | |
| CN104550948B (en) | Forming device and forming method for thin-wall sleeve magnetic materials | |
| CN106313498B (en) | A kind of preparation method of full spray printing nozzle cluster | |
| CN208914602U (en) | A kind of increasing material manufacturing device for micro-system three-dimensional structure | |
| CN103817941A (en) | Device and method for quickly forming magnetorheological material surface | |
| CN204658948U (en) | A kind of 3D printer based on Cartesian coordinate frame | |
| Li et al. | Evaluation of the quality for sheet deep drawing using a magnetorheological fluid (MRF) | |
| CN206201090U (en) | A kind of circuit board mould | |
| Cui et al. | Produce a large aluminium alloy sheet metal using electromagnetic-incremental forming (EM-IF) method | |
| CN209022445U (en) | A kind of nano high-precision increasing material manufacturing equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20170424 |