Three-dimensional temperature control system for regulating the viscosity of photosensitive liquid abrasive and its rapid prototyping method

Abstract

The present invention provides a three-dimensional temperature control system for regulating the viscosity of photosensitive-based liquid abrasives and a rapid prototyping method thereof. The three-dimensional temperature control system of the present invention is a three-dimensional spatial node distributed structure formed by a three-dimensional curved pipeline, which has an inlet and an outlet. A heating source is provided at each node of the three-dimensional curved pipeline. A heat transfer medium or a coolant is passed through the three-dimensional curved pipeline to ensure that the photosensitive-based liquid abrasive obtains different temperatures and viscosities at each node of the three-dimensional curved pipeline, thereby ensuring that the deformation of each node of the workpiece to be polished is similar during the polishing process. The three-dimensional temperature control system of the present invention is obtained by additive manufacturing. The three-dimensional temperature control system imitates the workpiece to be polished, and by adjusting the powder raw materials of different components and proportions, it can eventually form curved pipelines with various required heat dissipation effects. The three-dimensional temperature control system of the present invention can achieve rapid temperature rise and fall in three-dimensional space, and is suitable for the temperature control required for regulating the viscosity of photosensitive matrix liquid abrasives.

Description

Technical Field

[0001] The invention belongs to the technical field of finishing processing, and in particular relates to a three-dimensional temperature control system for regulating the viscosity of a photosensitive-based liquid abrasive and a rapid prototyping method thereof. Background Art

[0002] In recent years, demand and application of various porous functional components in the aerospace, medical, and energy heat exchange sectors have become increasingly widespread, such as lattice-topology turbine blades, removable dentures, and high-performance heat sinks. However, these components are often made of difficult-to-machine materials such as titanium alloys and feature complex structures, often with complex, nonlinear, and variable gradient surfaces. This presents significant challenges for polishing, a necessary post-processing step for these components. Due to the complex structures, many inaccessible areas, and the prevalence of thin-walled sections, traditional polishing methods are nearly impossible. Consequently, researchers at home and abroad have developed a new photosensitive liquid abrasive that can perform post-finishing processing on these components. This liquid abrasive, made from abrasives containing a photosensitive polymer, exhibits excellent viscoelasticity, making it suitable for machining complex, three-dimensional curved structures with variable stiffness. However, polishing different areas requires different viscoelastic properties, and high-speed polishing can easily generate heat, leading to significant thermal deformation in the polished part. Therefore, a rapid temperature control method is needed to rapidly adjust the abrasive temperature and thus quickly control the viscosity of the liquid abrasive. Most commonly used temperature control methods on the market can only achieve either heating or cooling, or they can achieve both, but are slow, large, and mostly flat, lacking a three-dimensional temperature control system. Therefore, it is necessary to develop a three-dimensional rapid temperature control system specifically for controlling the viscosity of photosensitive liquid abrasives. Summary of the Invention

[0003] This invention addresses the shortcomings of existing photosensitive liquid abrasive systems, such as their limited temperature control direction, slow speed, and large space requirements. By providing a three-dimensional temperature control system and rapid prototyping method for regulating the viscosity of photosensitive liquid abrasives, the system, fabricated using additive manufacturing, enables rapid temperature control and facilitates viscosity adjustment.

[0004] To achieve the above technical objectives, the technical solutions adopted in the embodiments of the present invention are:

[0005] In the first aspect, an embodiment of the present invention provides a three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive. The temperature control system is a three-dimensional spatial node distributed structure formed by a three-dimensional curved surface pipeline, having an inlet and an outlet. A heating source is provided at each node of the three-dimensional curved surface pipeline, and a heat transfer medium or coolant is introduced into the three-dimensional curved surface pipeline to ensure that the photosensitive liquid abrasive obtains different temperatures and viscosities at each node of the three-dimensional curved surface pipeline.

[0006] Furthermore, the temperature control system profiles the three-dimensional curved surface structure workpiece to be polished, sets the temperature of each heating source according to the stiffness and thermal deformation of each node of the workpiece to be polished, and ensures that the deformation of each node of the workpiece to be polished is similar during the polishing process.

[0007] Furthermore, the three-dimensional curved pipeline is integrally formed and manufactured by additive manufacturing. The three-dimensional curved pipeline as a whole can be accommodated in a sphere with a radius of 70 to 90 mm, and the diameter of a single pipeline is 4 to 10 mm.

[0008] Furthermore, the three-dimensional curved pipeline is prepared by stereolithography or selective laser sintering.

[0009] Furthermore, the raw material components of the three-dimensional curved pipeline include 70-90% of a matrix and 10-30% of a heat dissipation functional material, calculated by mass fraction, wherein the matrix is ​​a photosensitive resin or aluminum, the photosensitive resin is a light-curable material including acrylate and epoxy resin, and the heat dissipation functional material includes graphene or Teflon.

[0010] Furthermore, the heat transfer medium is a medium with a large specific heat capacity including water, ethylene glycol and silicone oil; and the coolant is liquid nitrogen, liquid ammonia or chlorofluorocarbon.

[0011] Furthermore, the heating source is a carbon fiber, metal wire or conductive polymer material patch, and the heating source is attached to the outer wall of the three-dimensional curved pipeline in the form of an annular patch roll. The thickness of the patch is 2~6mm and the length is 10~20mm.

[0012] Furthermore, the photosensitive liquid abrasive component comprises, by mass fraction, 18% to 38% abrasive particles, 60% to 80% photosensitive polymerization monomers, a photoinitiator, and a dispersant, totaling 2%. The viscosity of the photosensitive liquid abrasive is not greater than 1000 mPa·s.

[0013] The abrasive particles are silicon carbide and / or aluminum oxide abrasives, the photosensitive polymerization monomer is diphenol propane and / or hydroxyethyl acrylate, the photoinitiator is TPO and / or photoinitiator 907, and the dispersant is PMA25 and / or PVP.

[0014] Furthermore, the main functional parameters of the three-dimensional temperature control system are as follows: temperature control range 0~100℃, power range 30~300W, temperature rise and fall response time less than 0.5s / °C, and temperature rise and fall accuracy within ±0.5℃.

[0015] In a second aspect, an embodiment of the present invention provides a rapid prototyping method for a three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive, comprising the following steps:

[0016] A molding matrix powder containing the required heat dissipation functional material is added to the molding tank, layered according to the three-dimensional spatial temperature control pipeline model file, and corresponding motion code is generated. The computer moves along the layering plane according to the corresponding motion parameters, controlling the laser beam to selectively solidify the powder surface in the molding tank. Each time a layer of three-dimensional pipeline is constructed, the entire system descends a certain distance, and a layer of raw material is scraped in by a scraper, and then selectively solidified by laser. This process is repeated in the molding tank to produce a three-dimensional temperature control system; the molding layer thickness is 0.05-0.15mm, and the molding accuracy is ±0.1mm; the laser power is within 500mw-500w, the spot size is 0.1-0.5mm, and the scanning speed is 5-10m / s.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] At present, most of the commonly used abrasive temperature control methods are one-way control or the temperature rise and fall speed is not fast enough, or the temperature rise and fall speed is fast but the floor space is too large. In addition, the viscosity of the abrasive has a hysteresis, which makes the viscosity control of the abrasive almost difficult to achieve. The present invention uses a distributed three-dimensional spatial layout of nodes to imitate the three-dimensional complex structure workpiece to be polished, and sets the temperature of each patch according to the different stiffness and thermal deformation of each point of the workpiece to be polished, so that each node obtains a different temperature and polishing liquid abrasive viscosity, ensuring that the deformation of each node of the workpiece is similar during the polishing process. It is then equipped with pipelines made of additive manufacturing of different raw materials and new photosensitive liquid abrasives, making the abrasive viscosity control no longer difficult. The three-dimensional temperature control system prepared by additive manufacturing for the viscosity control of photosensitive liquid abrasives of the present invention has a fast temperature rise and fall response speed, high temperature control accuracy, and can also realize a constant temperature function. It does not occupy a large area and can function in three-dimensional space rather than in a plane. In summary, the present invention achieves rapid temperature control in three-dimensional space, rapid preparation of three-dimensional pipelines, and quick control of liquid abrasive viscosity, providing a feasible approach for post-finishing processing of key components in the fields of aerospace, medical, and energy heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 3D temperature control system is a schematic diagram of the structure of the curved pipeline node distribution in the embodiment.

[0020] Figure 2 3D schematic diagram of the workpiece to be polished in an embodiment of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the combination of a three-dimensional temperature control system and a workpiece to be polished in an embodiment of the present invention.

[0022] Figure 4 It is a structural schematic diagram of a three-dimensional curved surface pipeline photocuring molding device in a temperature control system.

[0023] Figure 5This is a schematic diagram of multi-component mixing of light-cured powder in a three-dimensional curved pipeline according to Example 1 of the present invention.

[0024] Figure 6 Schematic diagram of mixing the photosensitive liquid abrasive components in Example 1 of the present invention.

[0025] Figure 7 It is a structural diagram of a photosensitive liquid abrasive finishing device equipped with a three-dimensional temperature control system.

[0026] Explanation of the accompanying symbols: 1-inlet; 2-outlet; 3-heating source; 4-workpiece to be polished; 5-forming groove; 6-light-curing raw material; 7-scraper; 8-ultraviolet light; 9-body frame; 10-polishing platform; 11-transmission mechanism; 12-polishing tool; 13-control system; 14-chassis; 15-spindle; 16-abrasive cylinder. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "inside, outside", "upper, lower", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Example 1

[0030] like Figure 1 As shown, a three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive is shown. The temperature control system is a three-dimensional spatial node distributed structure formed by a three-dimensional curved surface pipeline, having an inlet 1 and an outlet 2. A heating source 3 is provided at each node of the three-dimensional curved surface pipeline. A heat transfer medium or coolant is introduced into the three-dimensional curved surface pipeline to ensure that the photosensitive liquid abrasive obtains different temperatures and viscosities at each node of the three-dimensional curved surface pipeline.

[0031] The temperature control system is configured to profile the workpiece 4 to be polished. The workpiece 4 to be polished is a three-dimensional curved surface structure, such as Figure 2As shown, the inlet 1 and outlet 2 of the temperature control system pipeline are arranged in parallel at the upper part of the temperature control system. The pipeline between the inlet end and the outlet end is arranged along an S-shaped route from bottom to top to form a three-dimensional curved surface structure with multiple layers of parallel structure. Nodes are formed at the connection points of the pipelines between adjacent layers. The overall size of the temperature control system is slightly larger than the size of the workpiece 4 to be polished. After the workpiece 4 to be polished is combined with the temperature control system, the workpiece to be polished can be inserted into the temperature control system exactly. Figure 3 As shown, the temperature of each heating source is set according to the stiffness and thermal deformation of each node of the workpiece to be polished, so as to ensure that the deformation of each node on the workpiece to be polished 4 is similar during the polishing process.

[0032] Specifically, the three-dimensional curved pipeline is integrally formed and manufactured by additive manufacturing, such as Figure 4 As shown, the entire three-dimensional curved pipeline can be accommodated in a sphere with a radius of 80 mm, and the diameter of the pipeline is 4 mm.

[0033] The three-dimensional curved pipeline is prepared by stereolithography or selective laser sintering.

[0034] like Figure 5 As shown, the raw material components of the three-dimensional curved surface pipeline include 87% of the matrix and 13% of the heat dissipation functional material by mass fraction, wherein the matrix is ​​a photosensitive resin, and the photosensitive resin adopts a light-curable material, preferably acrylate or epoxy resin. In this embodiment, the photosensitive resin adopts acrylate, and the heat dissipation functional material adopts graphene.

[0035] The heating source is a carbon fiber, metal wire or conductive polymer material patch. The heating source is attached to the outer wall of the three-dimensional curved pipeline in the form of a ring-shaped patch roll. The thickness of the patch is 3 mm and the length is 15 mm.

[0036] The temperature control system can be used as a heating channel or a cooling channel. When used as a heating channel, the heating patches set at each node of the three-dimensional curved surface pipeline are turned on, and a heat transfer medium is introduced into the inlet of the three-dimensional curved surface pipeline. The different temperatures set by the heating patches at each node are used to heat the system to the required high temperature.

[0037] When used as a cooling channel, coolant is introduced into the inlet of the three-dimensional curved pipeline, each heating patch is closed, excess heat transfer medium is discharged at the outlet, and then coolant is introduced at the inlet to achieve rapid cooling in the three-dimensional space.

[0038] Preferably, the heat transfer medium is a medium with a high specific heat capacity, including water, ethylene glycol, and silicone oil; the coolant is liquid nitrogen, liquid ammonia, or a chlorofluorocarbon. The heat transfer medium is preferably hot water at 20-80°C, and the coolant is preferably a mixture of 50% liquid nitrogen and 50% liquid ammonia.

[0039] like Figure 6As shown in FIG, the photosensitive liquid abrasive composition includes, by mass fraction, 30% abrasive, 68% photosensitive polymerization monomer, 0.7% photoinitiator and 1.3% dispersant, with a viscosity of no more than 1000 mPa·s. The abrasive is silicon carbide, the photosensitive polymerization monomer is hydroxyethyl acrylate, the dispersant is PMA25, and the photoinitiator is TPO. The product name of TPO is diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, CAS number 75980-60-8.

[0040] The main functional parameters of the three-dimensional temperature control system are as follows: heating and cooling range of 0~80℃, heating module power of 100W, cooling module power of 50W, heating response time of 0.2s / °C, and heating and cooling accuracy of ±0.2℃.

[0041] Example 2

[0042] like Figure 1 As shown, a three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive is shown. The temperature control system is a three-dimensional spatial node distributed structure formed by a three-dimensional curved surface pipeline, having an inlet 1 and an outlet 2. A heating source 3 is provided at each node of the three-dimensional curved surface pipeline. A heat transfer medium or coolant is introduced into the three-dimensional curved surface pipeline to ensure that the photosensitive liquid abrasive obtains different temperatures and viscosities at each node of the three-dimensional curved surface pipeline.

[0043] The temperature control system is configured to profile the workpiece 4 to be polished. The workpiece 4 to be polished is a three-dimensional curved surface structure, such as Figure 2 As shown, the inlet 1 and outlet 2 of the temperature control system pipeline are arranged in parallel at the upper part of the temperature control system. The pipeline between the inlet end and the outlet end is arranged along an S-shaped route from bottom to top to form a three-dimensional curved surface structure with multiple layers of parallel structure. Nodes are formed at the connection points of the pipelines between adjacent layers. The overall size of the temperature control system is slightly larger than the size of the workpiece 4 to be polished. After the workpiece 4 to be polished is combined with the temperature control system, the workpiece to be polished can be inserted into the temperature control system exactly. Figure 3 As shown, the temperature of each heating source is set according to the stiffness and thermal deformation of each node of the workpiece to be polished, so as to ensure that the deformation of each node on the workpiece to be polished 4 is similar during the polishing process.

[0044] Specifically, the three-dimensional curved pipeline is integrally formed and manufactured by additive manufacturing, such as Figure 4 As shown, the entire three-dimensional curved pipeline can be accommodated in a sphere with a radius of 90 mm, and the diameter of the pipeline is 8 mm.

[0045] The three-dimensional curved pipeline is prepared by stereolithography or selective laser sintering.

[0046] Calculated by mass, the raw material components of the three-dimensional curved pipeline include 87% of the matrix and 13% of the heat dissipation functional material, wherein the matrix is ​​a photosensitive resin, and the photosensitive resin is a light-curable material, preferably an acrylate or epoxy resin. In this embodiment, the photosensitive resin is epoxy resin, and the heat dissipation functional material is Teflon.

[0047] The heat transfer medium is a medium with a large specific heat capacity, including water, ethylene glycol, and silicone oil, and the coolant is liquid nitrogen, liquid ammonia, or chlorofluorocarbons. Preferably, the heat transfer medium is hot water at 20-80°C, and the coolant is a mixture of 50% liquid nitrogen and 50% liquid ammonia.

[0048] The heating source is a carbon fiber, metal wire or conductive polymer material patch. The heating source is attached to the outer wall of the three-dimensional curved pipeline in the form of a ring-shaped patch roll. The thickness of the patch is 4mm and the length is 18mm.

[0049] The temperature control system can be used as a heating channel or a cooling channel. When used as a heating channel, the heating patches set at each node of the three-dimensional curved surface pipeline are turned on, and a heat transfer medium is introduced into the inlet of the three-dimensional curved surface pipeline. The different temperatures set by the heating patches at each node are used to heat the system to the required high temperature.

[0050] When used as a cooling channel, each heating patch is closed, and excess heat transfer medium is discharged from the outlet of the three-dimensional curved pipeline. Then, coolant is introduced at the inlet to achieve rapid cooling in the three-dimensional space.

[0051] The photosensitive liquid abrasive composition includes 30% abrasive, 68% photosensitive polymerization monomer, 0.7% photoinitiator and 1.3% dispersant by mass fraction, with a viscosity of no more than 1000 mPa·s and a controllable viscosity within 200~800 mPa·s; wherein the abrasive is aluminum oxide abrasive, the photosensitive polymerization monomer is diphenol propane, the dispersant is PVP, and the photoinitiator is 907, the molecular formula of which is C 13 H 17 NO2S, molecular weight 251.3446, CAS number: 71868-10-5.

[0052] The main functional parameters of the three-dimensional temperature control system are as follows: temperature control range 0~100℃, heating module power 100W, cooling module power 50W, heating and cooling response time 0.2s / °C, and heating and cooling accuracy of ±0.2℃.

[0053] Example 3

[0054] The three-dimensional pipelines in the three-dimensional temperature control system in Examples 1 and 2 are rapidly formed by stereolithography. The principle of the forming method is as follows: Figure 4 As shown, the rapid prototyping method of the three-dimensional temperature control system includes the following steps:

[0055] A molding matrix powder (i.e., a photocurable raw material 6, comprising 87% of the matrix and 13% of the heat dissipation material) containing the desired heat dissipation functional material is added to the molding tank 5. Layering is performed according to the three-dimensional spatial temperature control pipeline model file, and corresponding motion code is generated. A computer moves along the layering plane according to the corresponding motion parameters. The computer controls the ultraviolet light beam to selectively cure the photocurable raw material in the molding tank. Each time a layer of the three-dimensional pipeline is constructed, the entire structure descends a certain distance. A layer of raw material is scraped in by a scraper 7, and then selectively cured by ultraviolet light 8. This process is repeated in the molding tank 5 to produce a three-dimensional temperature control system. The molding layer thickness is 0.05-0.15mm, and the molding accuracy is ±0.1mm. The laser power is within 500mw-500w, the spot size is 0.1-0.5mm, and the scanning speed is 5-10m / s.

[0056] The space of the molding tank 5 is 200mm×200mm×200mm to 300mm×300mm×300mm, and the molded three-dimensional temperature control system can be accommodated in a space of 50mm×50mm×50mm to 150mm×150mm×150mm.

[0057] Example 4

[0058] A method for polishing using a photosensitive liquid abrasive finishing device comprises the following steps:

[0059] (1) Figure 2 The workpiece 4 to be polished is placed in an abrasive cylinder 16 of a photosensitive liquid abrasive finishing device, and the abrasive cylinder 16 is filled with prepared photosensitive liquid abrasive in advance;

[0060] like Figure 7 As shown, the photosensitive liquid abrasive finishing equipment specifically includes a body frame 9, a polishing platform 10, a transmission mechanism 11, a polishing tool 12, and a control system 13. The body frame adopts an aluminum profile "frame-type" support structure and is connected to the chassis 14 by bolts; the polishing platform 10 is placed on the chassis 14; the screw stage in the transmission mechanism is connected to the body frame 9 by bolts; the polishing tool 12 is a quickly replaceable fixture, which is connected to the main shaft by fastening bolts. The three-dimensional temperature control system is installed in the abrasive cylinder on the polishing platform. The workpiece to be polished is placed in the three-dimensional temperature control system. The temperature control system imitates the workpiece to be polished to adjust the specific temperature of each node of the abrasive cylinder and the viscosity of the liquid abrasive according to the workpiece to be polished.

[0061] (2) A heat transfer medium is introduced into the three-dimensional temperature control system of the profiling workpiece. According to the different stiffness and thermal deformation of each node of the workpiece to be polished, each heating patch is set to a different temperature to heat the heat transfer medium in the pipeline;

[0062] like Figure 2As shown in the figure, since the stiffness of the workpiece to be polished gradually decreases and the thermal deformation gradually increases from bottom to top, the heating film temperature is set to 20℃, 40℃, 60℃ and 80℃ from top to bottom respectively, and hot water of corresponding temperature is introduced during heating to regulate the temperature of each node and the viscosity of the corresponding liquid abrasive in detail to ensure the consistency of the deformation size of each node during the polishing process.

[0063] (3) The workpiece 4 to be polished is rotated by the rotation of the spindle 15 so that each node obtains a different temperature and viscosity of the polishing liquid abrasive. After polishing for a certain period of time, a coolant is introduced to reduce the overall temperature of the workpiece and quickly remove the abrasive forming, thereby ensuring that the deformation of each node of the part is similar during the polishing process.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive, characterized in that: The temperature control system is a three-dimensional spatial node distributed structure formed by a three-dimensional curved surface pipeline, having an inlet and an outlet. A heating source is provided at each node of the three-dimensional curved surface pipeline. A heat transfer medium or coolant is introduced into the three-dimensional curved surface pipeline to ensure that the photosensitive liquid abrasive obtains different temperatures and viscosities at each node of the three-dimensional curved surface pipeline. The temperature control system profiles the three-dimensional curved surface structure workpiece to be polished, sets the temperature of each heating source according to the stiffness and thermal deformation of each node of the workpiece to be polished, and ensures that the deformation of each node of the workpiece to be polished is similar during the polishing process.

2. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to claim 1, characterized in that: The three-dimensional curved pipeline is integrally formed and manufactured by additive manufacturing. The three-dimensional curved pipeline as a whole can be accommodated in a sphere with a radius of 70 to 90 mm, and the diameter of a single pipeline is 4 to 10 mm.

3. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to claim 1, characterized in that: The three-dimensional curved pipeline is prepared by stereolithography or selective laser sintering.

4. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to claim 1, characterized in that: Calculated by mass, the raw material components of the three-dimensional curved pipeline include 70% to 90% of a matrix and 10% to 30% of a heat dissipation functional material, wherein the matrix is ​​a photosensitive resin or aluminum, the photosensitive resin is a light-curable material including acrylate and epoxy resin, and the heat dissipation functional material includes graphene or Teflon.

5. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to claim 1, characterized in that: The heat transfer medium is a medium with a large specific heat capacity including water, ethylene glycol and silicone oil; the coolant is liquid nitrogen, liquid ammonia or chlorofluorocarbon.

6. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to claim 1, characterized in that: The heating source is a carbon fiber, metal wire or conductive polymer material patch, and the heating source is attached to the outer wall of the three-dimensional curved pipeline in the form of an annular patch roll. The thickness of the patch is 2~6mm and the length is 10~20mm.

7. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to claim 1, wherein: The photosensitive liquid abrasive component comprises, by mass fraction, 18% to 38% abrasive particles, 60% to 80% photosensitive polymerization monomers, a photoinitiator, and a dispersant, totaling 2%. The viscosity of the photosensitive liquid abrasive is no more than 1000 mPa·s. The abrasive particles are silicon carbide and / or aluminum oxide abrasives, the photosensitive polymerization monomer is diphenol propane and / or hydroxyethyl acrylate, the photoinitiator is TPO and / or photoinitiator 907, and the dispersant is PMA25 and / or PVP.

8. The three-dimensional temperature control system for regulating the viscosity of a photosensitive liquid abrasive according to any one of claims 1 to 7, characterized in that: The main functional parameters of the three-dimensional temperature control system are as follows: temperature control range 0~100℃, power range 30~300W, temperature rise and fall response time less than 0.5s / °C, and temperature rise and fall accuracy within ±0.5℃.

9. The rapid prototyping method of the three-dimensional temperature control system for regulating the viscosity of the photosensitive liquid abrasive according to claim 1, characterized in that: The following steps are involved: A molding matrix powder containing the required heat dissipation material is added to the molding tank. Layering is performed according to the three-dimensional spatial temperature control pipeline model file, and corresponding motion code is generated. The computer moves along the layering plane according to the corresponding motion parameters, controlling the laser beam to selectively solidify the powder surface in the molding tank. Each time a layer of three-dimensional pipeline is constructed, the entire structure descends a certain distance, and a layer of raw material is scraped in by a scraper, and then selective laser solidification is performed. This process is repeated in the molding tank to produce a three-dimensional temperature control system. The forming layer thickness is 0.05~0.15mm, the forming accuracy is ±0.1mm; the laser power is within 500mw~500w, the spot size is 0.1~0.5mm, and the scanning speed is 5~10m / s.

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