Capillary tube array blank section cutting method and cutting system

Abstract

The invention relates to a capillary tube array blank section cutting method and cutting system. The method comprises the following steps: vertically fixing a blank section along an axis; water is used as cutting fluid, and a horizontal blade is used for cutting at the preset cutting position; in the cutting process, positive pressure gas is introduced from the top of the blank section, and gas is blown into the capillary tube; turning over the blank section by 180 degrees, and cutting at a preset cutting position; the blank sections with the two cut ends are cleaned with alkali liquor; washing with deionized water; and drying. The technical problem to be solved is how to cut a capillary tube array blank section, so that the capillary tube array blank section can be suitable for cutting a capillary tube array with ultrahigh length-diameter ratio, high uniformity and large area, the cut capillary tube array is good in end face parallelism and planeness and high in cleanliness, and the purity of subsequent liquid flash filling can be improved. And line defects caused by ignition and friction between the surface of the blade and the end face of the capillary tube during cutting can be prevented, and the product quality is improved, so that the device is more practical.

Description

Technical Field

[0001] The invention relates to the fields of fast neutron detection device technology and optical processing technology, and in particular to a capillary array billet cutting method and a cutting system. Background Art

[0002] Liquid scintillator fiber optic panel is a fast neutron detection device, mainly composed of liquid scintillator and capillary array. The preparation process of liquid scintillator fiber optic panel is usually to draw a low refractive index glass tube into a capillary monofilament with a circular cross section, and then draw the monofilament into a hexagonal multifilament rod through hexagonal stacking, and then draw the multifilament rod to obtain a capillary multifilament, each multifilament contains multiple capillary fibers, and the multifilament is cut into a certain length and stacked into a capillary fiber bundle, and then heated and fused together to form a billet, and the two ends of the billet are cut into planes. After cutting, the capillary is cleaned, and then the capillary is filled with liquid scintillator, and the two ends are covered with lenses or fiber optic panels for packaging.

[0003] In order to make the capillary array fit tightly with the lens or optical fiber panel and obtain a capillary with high airtightness and high light transmission package coupling, its end face must have an ultra-high surface roughness, so the capillary needs to be cut. In order to achieve higher resolution and detection efficiency, the typical size of the liquid scintillation capillary array is 10μm aperture, 100mm diameter, and 100mm length. Since the processing size of the panel of this size is too large and the aperture is too small, it will cause serious contamination problems during cutting. This type of liquid scintillation capillary array that requires ultra-high parallelism and flatness and is of ultra-large size cannot be achieved by wire cutting, horizontal cutting, laser cutting and other methods, and can only be cut by vertical cutting method.

[0004] However, there are the following problems when cutting capillary array billets using the vertical cutting method: first, vertical cutting generally uses oil-based cutting fluid, but the oil-based cutting fluid will quickly enter the capillary under the capillary action of the capillary in the billet and contaminate the capillary; at the same time, glass debris generated by cutting will also enter the capillary and cause pollution; and for such capillaries with ultra-high aspect ratio, it is difficult to completely discharge the oil-based cutting fluid and glass debris, which seriously affects the purity of subsequent liquid flash filling; second, when cutting oversized capillaries, due to their excessively large diameter, it is difficult for the cutting fluid to enter the interior from the cutting port, resulting in insufficient cooling, sparking, and board explosion. Summary of the invention

[0005] The main purpose of the present invention is to provide a capillary array billet cutting method and a cutting system. The technical problem to be solved is how to cut the capillary array billet so that it can be suitable for cutting ultra-high aspect ratio, high uniformity large-area capillary arrays. The capillary array end face roughness after cutting is good, the micropore cleanliness is high, the purity of subsequent liquid flash filling can be improved, and sparks during cutting and grain defects caused by friction between the blade surface and the capillary end face can be prevented, thereby improving product quality and being more suitable for practical use.

[0006] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. According to a capillary array billet cutting method proposed by the present invention, the billet includes a first end and a second end, which includes the following steps:

[0007] S1: fix the billet in a vertical axis manner; the first end is downward and the second end is upward; water is used as cutting fluid and a horizontally arranged blade is used to cut the billet at a preset cutting position close to the first end; during the cutting process, positive pressure gas is introduced from the top of the billet to blow air into the capillary;

[0008] S2: turning the billet 180 degrees; using water as cutting fluid, cutting the billet at a preset cutting position near the second end with a horizontally arranged blade; during the cutting process, introducing positive pressure gas from the top of the billet to blow air into the capillary;

[0009] S3 uses alkali solution to clean the billet segments cut at both ends; cleans with deionized water; and dries.

[0010] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0011] Preferably, in the aforementioned method, the water is provided by a high-pressure water pump and sprayed toward the port and upper and lower surfaces of the blade, acting on the position where the blade contacts the billet.

[0012] Preferably, in the aforementioned method, the water is sprayed from a plurality of spray ports; the water outlet width of the spray ports is greater than or equal to the billet diameter.

[0013] Preferably, in the aforementioned method, atomized water droplets are mixed in the positive pressure gas; the atomized water droplet flow merges into the positive pressure gas flow, the positive pressure gas flow pushes the atomized water droplet flow into the capillary, and is blown out from the gap between the billet and the blade.

[0014] Preferably, in the aforementioned method, the pressure of the positive pressure gas is ≤0.6 MPa.

[0015] Preferably, in the aforementioned method, the capillary pore size in the billet is 10 μm; and the particle size of the atomized water droplets is 3 to 5 μm.

[0016] Preferably, in the aforementioned method, the material flow direction in the atomization pipeline and the material flow direction in the gas pipeline are at an angle of 25 to 35 degrees.

[0017] Preferably, in the aforementioned method, the alkali solution cleaning comprises placing the billet with both ends cut in a constant temperature hot alkali solution for ultrasonic treatment to allow the alkali to react with the glass fragments.

[0018] Preferably, in the aforementioned method, the alkali solution is a sodium hydroxide solution or a potassium hydroxide solution; the temperature of the hot alkali solution is 55-65°C; and the ultrasonication comprises: ultrasonication at a frequency of 40kHz in the hot alkali solution, and then ultrasonication at a frequency of 80kHz in the hot alkali solution.

[0019] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. A capillary array billet cutting system proposed in the present invention comprises:

[0020] A vertical cutting machine comprises a mechanical arm and a blade; a billet fixing fixture is provided at one end of the mechanical arm;

[0021] A rotating angle table, arranged on the billet fixing fixture;

[0022] A water pump is arranged on one side of the vertical cutting machine;

[0023] A plurality of injection ports are arranged above and below the blade; the injection ports are connected to the water pump;

[0024] The cutting tool comprises an annular body; the inner diameter of the annular body matches the effective area diameter of the billet to be cut; the cutting tool also comprises a top cover; the top cover is provided with a vent;

[0025] A gas source connected to the vent via a gas pipeline;

[0026] An ultrasonic atomizer, the output end of which is connected to the gas pipeline via an atomization pipeline;

[0027] Ultrasonic cleaning machine is used to clean the billet that has been cut at both ends.

[0028] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0029] Preferably, in the aforementioned system, the injection port is a flat duckbill structure; the width of the injection port is greater than or equal to the diameter of the billet.

[0030] By means of the above technical solution, the capillary array billet cutting method and cutting system proposed by the present invention have at least the following advantages:

[0031] The capillary array billet cutting method and cutting system proposed in the present invention cut the capillary array billet by a vertical cutting method; during cutting, the bottom of the billet is cut by using water as a cutting fluid, which can effectively avoid the defect that the oil-based cutting fluid flows into the capillary and is difficult to clean; at the same time, during the cutting process, the present invention introduces positive pressure gas into the capillary from the top of the billet through a tooling with a specific structure, and blows out the water flowing into the capillary and the glass debris that may fall into the capillary by blowing; after one end face of the billet is cut flat, the billet is turned 180 degrees by a rotating structure, and the above-mentioned cutting process is repeated to cut the other end of the billet flat; then, the billet with both ends cut is cleaned by an alkali solution, so that the alkali reacts chemically with the glass debris remaining in the capillary and dissolves; the capillary glass has a silicon-oxygen tetrahedron as a network body, and the bridging oxygen of the silicon-oxygen network will be oxidized by OH in the alkali solution. - The glass fragments are eroded and broken due to irregular shapes. When in contact with alkali solution, the glass fragments will be first eroded by the alkali solution and dissolved, while the capillary glass will not be excessively eroded. Finally, the alkali solution and the reaction products of the alkali solution and the glass fragments are removed by rinsing with deionized water, thereby obtaining a capillary array with high cleanliness. The capillary array obtained by cutting according to the technical solution of the present invention has good roughness of the two end faces and high cleanliness, which can improve the purity of subsequent liquid flash filling.

[0032] Furthermore, the present invention mixes atomized water droplets into the forward gas and pushes the atomized water droplets through the blowing airflow, so that the atomized water droplets enter the capillary tube. By controlling the particle size of the atomized water droplets, it is easier for them to collide with the glass fragments remaining in the channel, which is more conducive to the removal of pollutants.

[0033] Furthermore, the technical solution of the present invention provides a specially structured flat duckbill-shaped jet port so that the port and upper and lower surfaces of the blade can be fully cooled with a wider water outlet width, thereby increasing the cooling area and cooling the lower surface more fully, thereby preventing sparking during cutting and grain defects caused by friction between the blade surface and the capillary end face, thereby improving product quality.

[0034] Through the technical solution of the present invention, the surface quality of the ultra-high aspect ratio, high uniformity large-area capillary array can be improved, and the capillary array can be closely fitted with the input window and the output window to obtain capillaries with high airtightness and high light transmission packaging coupling.

[0035] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is a schematic diagram of the water cutting fluid operation structure in the capillary array billet cutting system of the present invention;

[0037] Figure 2 It is a schematic diagram of the water jet arrangement structure in the capillary array billet cutting system of the present invention;

[0038] Figure 3 It is a schematic diagram of the cooling area of ​​a single tube of oil-based cutting fluid in a prior art vertical cutting method;

[0039] Figure 4 Schematic diagram of the cooling area of ​​water-based cutting fluid in the capillary array billet cutting system of the present invention;

[0040] Figure 5a This is a schematic diagram of the flat duckbill structure of the present invention - a top view;

[0041] Figure 5b This is a schematic diagram of the flat duckbill structure of the present invention - a front view;

[0042] Figure 6 It is a schematic diagram of the cutting tool structure in the capillary array billet cutting system of the present invention;

[0043] Figure 7 It is a schematic diagram of the structure of the rotating angle table in the capillary array billet cutting system of the present invention;

[0044] Figure 8 It is a schematic diagram of the structure of the alkaline solution cleaning operation in the capillary array billet cutting system of the present invention;

[0045] Fig. 9 It is a structural schematic diagram of the capillary array billet cutting system of the present invention. DETAILED DESCRIPTION

[0046] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of a capillary array billet cutting method and cutting system proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0047] The present invention provides a method for cutting a capillary array billet, wherein the billet includes a first end and a second end, and the two ends of the billet have the same structure. The first end and the second end are defined here only for the convenience of description when introducing the cutting method. The cutting described in the present invention is to cut the two end faces of the capillary array billet flat, discard the cut parts at the two ends, retain the middle part for subsequent filling of liquid scintillator into the capillary, and then cover the two ends with lenses or optical fiber panels for packaging.

[0048] The cutting method of the present invention comprises the following steps:

[0049] The first step is to cut the first end of the billet. The specific operation is to fix the billet in a vertical axis manner, that is, the capillary array billet is in a vertical state, and cut it with a horizontally arranged blade; because this step is to cut the first end, the billet is preferably installed with the first end downward and the second end upward; when cutting, the blade is cut at a preset cutting position close to the first end, that is, the blade cuts close to the bottom of the billet; the purpose of this arrangement is to retain only part of the capillary array above the blade after cutting, so when cutting, only the capillaries above the blade need to be cleaned, without considering the cleanliness of the capillaries below the blade, so as to facilitate the control of the process of the cutting process.

[0050] Vertical cutting generally uses oil-based cutting fluid. However, the billet cut in the present invention is a capillary array billet, which is composed of multiple capillaries with finer pores. Therefore, the cutting fluid used in the cutting process may enter the capillaries and contaminate the capillaries. Since the capillaries have fine pores and are difficult to clean, the present invention preferably uses water as the cutting fluid to facilitate the subsequent cleaning of the capillary array and avoid affecting the purity of the liquid scintillator in the subsequent liquid scintillator fiber optic panel due to cutting fluid contamination.

[0051] In order to ensure the cleanliness of the cutting fluid and avoid the introduction of cut glass debris and other debris into the capillary due to the recycling of the cutting fluid, the present invention preferably uses a unidirectional flow of the water cutting fluid. Specifically, the cutting fluid of the present invention is not recycled, and the water used as the cutting fluid is only used once during the cutting process. The used water is directly discharged or collected for other uses.

[0052] During the cutting process, the cutting fluid and glass debris generated by cutting will inevitably contaminate the capillary; in order to ensure the cleanliness of the capillary, the present invention preferably introduces positive pressure gas from the top of the billet during the cutting process to blow air into the capillary; specifically, as shown in the attached Figure 6 As shown, the present invention designs a cutting tool with a special structure, which includes an annular body; the inner diameter of the annular body matches the diameter of the effective area of ​​the billet to be cut, and the matching here means that the inner diameter of the annular body is ≥ the diameter of the effective area of ​​the billet to be cut, so that the effective area of ​​the billet to be cut is completely contained in the inner cavity of the annular body, so that air can be blown into the capillary through the inner cavity of the annular body, so that most of the glass debris and water cutting fluid cannot remain in the capillary array.

[0053] In order to ensure that the positive pressure gas can clean up impurities such as glass fragments as much as possible, the gas pressure should be as high as possible; however, when the blowing pressure is too high, the water cutting fluid may be blown away and difficult to stay on the blade surface, thereby affecting its lubrication and cooling effects; for this reason, the present invention preferably has a pressure of the positive pressure gas ≤0.6MPa to balance the effects of blowing on capillary cleaning and blade and billet lubrication and cooling, so as to achieve a state with better comprehensive performance.

[0054] The second step is to cut the second end of the billet. Figure 6 and attached Figure 7 As shown, the present invention designs a billet fixing fixture equipped with a rotating angle table, and the billet fixing fixture is used to clamp the billet to be cut. The optical scale of the rotating angle table is adjusted by the rotating angle table to rotate the billet fixing fixture 180°, that is, the billet can be flipped 180° without disassembling the billet, so that the second end of the billet is facing downward; at this time, the aforementioned steps can be repeated to cut the second end.

[0055] The third step is to clean the billet that has been cut at both ends. Specifically, the cut billet is placed in an ultrasonic cleaning machine for ultrasonic alkali cleaning. Under ultrasonic conditions, the alkali reacts chemically with the glass fragments in the capillary and dissolves them. The capillary glass is a silicon-oxygen tetrahedron network. The bridging oxygen of the silicon-oxygen network will be oxidized by OH in the alkali solution. - Due to the irregular shape of the glass fragments, when they come into contact with alkali solution, the glass fragments will be corroded and dissolved first, while the capillary glass will not be corroded and broken.

[0056] Finally, the alkali solution and the reaction products of the alkali solution and the glass fragments are removed by rinsing with deionized water, and a capillary array with high cleanliness is obtained after drying.

[0057] The capillary array cut by the technical solution of the present invention has good parallelism and flatness of the two end faces and high cleanliness, and can improve the purity of subsequent liquid scintillator filling.

[0058] The present invention also provides a capillary array billet cutting system, as shown in the attached Fig. 9 As shown, it includes:

[0059] A vertical cutting machine comprises a mechanical arm and a blade; a billet fixing fixture is provided at one end of the mechanical arm; the billet fixing fixture is used to clamp the billet; the mechanical arm is used to carry the billet to move in a three-dimensional space; the blade is used to cut the billet;

[0060] A rotating angle table, disposed on the billet fixing fixture, for precisely adjusting the angle of the billet fixing fixture, thereby precisely controlling the direction of the billet;

[0061] A water pump is arranged on one side of the vertical cutting machine;

[0062] A plurality of injection ports are arranged above and below the blade; the injection ports are connected to the water pump;

[0063] The cutting tool comprises an annular body; the inner diameter of the annular body matches the effective area diameter of the billet to be cut; the cutting tool also comprises a top cover; the top cover is provided with a vent;

[0064] A gas source connected to the vent via a gas pipeline;

[0065] An ultrasonic atomizer, the output end of which is connected to the gas pipeline via an atomization pipeline;

[0066] Ultrasonic cleaning machine is used to clean the billet that has been cut at both ends.

[0067] In a specific embodiment of the present invention, as shown in the attached Figure 1 The schematic diagram of the water cutting fluid operation structure in the capillary array billet cutting system of the present invention is shown, wherein 1 is a vertical cutting machine, 21 is a high-pressure water pump, 22 is a water storage tank, 23 is a drainage pipe, 24 is a cutting fluid delivery pipe, 25 is a jet port, 26 is a nozzle mounting frame, and 27 is a cutting fluid receiving tank; the water in the water storage tank is provided by a centralized water supply system, and a water supply pipe 28 for supplying water to the water storage tank is shown in the attached figure. Fig. 9 As shown; the water pump is arranged in the water storage tank; one end of the cutting fluid delivery pipe is connected to the water pump, and the other end is connected to the injection port. At the end close to the injection port, the cutting fluid delivery pipe is fixed on the nozzle mounting frame to fix the position of the injection port; in order to facilitate the position and angle adjustment of the injection port, the cutting fluid delivery pipe is preferably a soft copper pipe; the vertical cutting machine includes a blade ( Figure 1 The water cutting fluid is pumped by a high-pressure water pump and sprayed toward the port and upper and lower surfaces of the blade. The water cutting fluid acts on the contact position between the blade and the billet to lubricate and cool it. The used water cutting fluid is collected by the cutting fluid receiving tank and discharged through the drain pipe. It is no longer recycled back to the cutting fluid system for reuse, which reduces process pollution and ensures that no other pollutants except glass debris enter the capillary during the cutting process to avoid contamination of the capillary. The water in the capillary can be removed by subsequent drying.

[0068] In a specific embodiment of the present invention, as shown in the attached Figure 2The figure shows a schematic diagram of the water jet arrangement structure in the capillary array billet cutting system of the present invention, wherein 11 is a mechanical arm of a vertical cutting machine, 12 is a blade, 8 is a capillary array billet, 24 is a cutting fluid delivery pipe, 25 is a jet port, and 27 is a cutting fluid receiving tank; the mechanical arm is used to clamp the capillary array billet to be cut and move it linearly up, down, left, and right, and can adjust the position of the billet in the vertical direction, and can also carry the billet to move in the horizontal direction, so that the billet moves relative to the blade, thereby allowing the blade to cut the billet.

[0069] In a specific embodiment of the present invention, the cutting blade is a concentric circular blade, and the blade edge is arranged on the inner edge of the blade. During cutting, the robot arm delivers the billet into the inner ring of the circular blade, and then the robot arm moves the billet in a straight line relative to the blade, and the blade rotates to cut the billet.

[0070] The vertical cutting method generally uses oil-based cutting fluid single-tube cooling, such as the attached Figure 3 The figure shows a schematic diagram of the single-tube cooling area of ​​oil-based cutting fluid in the prior art vertical cutting method, where 12 is a blade, 8' is a common billet, 24' is a cutting fluid delivery pipe for single-tube cooling, and 7' (the black block in the figure) is the cooling area of ​​the cutting fluid during single-tube cooling; as shown in the figure, the cooling area of ​​the cutting fluid during single-tube cooling is small. The advantage of using water as the cutting fluid in the present invention is that water has a high specific heat capacity and thermal conductivity, and it performs well in cooling and cleaning, and can effectively remove glass chips and dirt in the capillary. However, compared with oil-based cutting fluid, the disadvantage of using water as a cutting fluid is that it has lower lubrication performance and poor adhesion to the blade, so more cutting fluid injection volume is required to improve this disadvantage; and, when a large-diameter device is cut vertically, its large diameter seriously affects the flow of the cutting fluid, making it difficult for it to enter the interior of the billet from the cutting port, thereby causing insufficient cooling of the blade to cause sparks, board explosion, etc.; at the same time, due to the influence of gravity, the water cutting fluid can stay on the upper surface of the blade for a long time, but it is easy to drip directly to the bottom on the lower surface of the blade, and it is not easy to enter the interior of the device from the cutting end face; in order to better use water as the cutting fluid for lubrication and cooling, the present invention preferably has multiple cutting fluid injection ports, for example, 4 injection ports, which are respectively arranged above and below the blade; each injection port is arranged directly opposite to the contact portion between the blade edge and the billet to ensure the injection position of the water cutting fluid, so as to effectively lubricate and cool the blade and the cutting port.

[0071] In a specific embodiment of the present invention, two injection ports are preferably provided under the blade for cooling, and the angles of the injection ports are adjusted so that the water cutting fluid can be easily delivered to the lower surface of the blade during the cutting process, thereby making it cooler more fully.

[0072] In a specific embodiment of the present invention, in order to ensure that the blade can be fully lubricated and cooled, the water outlet width of the preferred jet port of the present invention is greater than or equal to the diameter of the billet, so that the water cutting fluid can cover as large an area as possible on the blade to lubricate and cool it.

[0073] In a specific embodiment of the present invention, it is preferred to improve the lubrication and cooling effects by designing a specially structured injection port, for example, as shown in the attached Figure 5a and attached Figure 5b As shown, the injection port is a flat duckbill structure, and the width of the injection port is limited to be greater than or equal to the diameter of the billet. The technical purpose of this structural design is to make the cooling area of ​​the blade larger and the lower surface cooling more sufficient.

[0074] In the above technical scheme, a plurality of injection ports are provided, and the injection ports are respectively provided above and below the blade, so that each injection port is provided directly opposite to the contact portion between the blade edge and the billet, so as to ensure the injection position of the water cutting fluid, so as to effectively lubricate and cool the blade and the cutting port. Its technical purpose is also to lubricate the blade surface and the capillary end face to prevent sparking and grain defects caused by friction between the blade surface and the capillary end face, thereby ensuring the surface quality of the billet after cutting.

[0075] The schematic diagram of the water-based cutting fluid cooling area in the capillary array billet cutting system improved by the above technical solution is shown in the attached figure. Figure 4 As shown, 12 is a blade, 8 is a capillary array blank, and 7 (the black block part in the figure) is the cooling area of ​​the cutting fluid when the cutting system of the present invention is cooled by multiple jets; as shown in the figure, it can be seen that the cooling area of ​​the cutting fluid when the cutting system of the present invention is cooled by multiple jets is greatly increased, which can more effectively lubricate the blade and the cutting end face, and more effectively cool the blade and the cutting port. The applicant found that although multiple jets were set above and below the blade to spray water cutting fluid, it was found during the actual cutting process that although the quality of the lower surface of the blade was improved and sparks would no longer occur, the roughness of the lower surface of the blade was still not as good as that of the upper surface. Due to the influence of gravity, the water cutting fluid can stay on the upper surface of the blade for a long time, while the adhesion of water to the lower surface of the blade is poor. The different roughness of the two sides of the blade will lead to different qualities of the surface of the cut billet, which may affect the coupling effect of the subsequent liquid flash panel. The present invention preferably designs a rotating angle table with an optical scale. After cutting at the first end, the billet is flipped 180°, and the second end cutting is performed after the cutting tool is bonded. This process setting ensures that the cut end face of the billet is in the same operating scene regardless of whether it is the first end cutting or the second end cutting, thereby ensuring the consistency of the quality of the two cut end faces to the greatest extent, thereby providing a guarantee for the coupling effect of the liquid flash panel.

[0076] Furthermore, in order to better ensure the cleanliness of the capillary, the present invention preferably mixes atomized water droplets into the positive pressure gas, and during the blowing process, the airflow pushes the droplets, so that after the droplets enter the capillary, they are more likely to collide with the glass fragments remaining in the channel, which is more conducive to the removal of pollutants.

[0077] In a specific embodiment of the present invention, as shown in the attached Figure 6 and attached Figure 7 As shown, 11 is the mechanical arm of the vertical cutting machine, 12 is the blade, 13 is the billet fixing fixture, 14 is the rotating angle table, 24 is the cutting fluid delivery pipe, 25 is the injection port, 26 is the nozzle mounting bracket, 27 is the cutting fluid receiving tank, 3 is the cutting tool, 31 is the vent, 32 is the top cover, 33 is the annular body, 4 is the air source, 5 is the ultrasonic atomizer, and 8 is the capillary array billet; the billet fixing fixture is used to clamp the billet to be cut; the rotating angle table is used to precisely adjust the angle of the billet fixing fixture, and then accurately control the direction of the billet; the mechanical arm is used to carry the billet for displacement in three-dimensional space; the blade is used to cut the billet; the cutting tool includes an annular body and a top cover, which form a Inner cavity; when cutting the billet, the cutting tool should first be glued to the top of the capillary array billet by glue, so that the internal cavity part of the annular body is opposite to the effective area of ​​the billet; the inner diameter of the annular body matches the effective area diameter of the billet to be cut, that is, the inner diameter of the annular body ≥ the effective area diameter of the billet to be cut, so that the effective area of ​​the billet to be cut is completely inside the annular body, so that air can be blown into the capillary through the inner cavity of the annular body, and then come out from the gap between the cutting end face of the billet and the blade, so that most of the glass debris and water cutting fluid cannot remain in the capillary array; a vent is provided on the top cover; the gas source is connected to the vent through a gas pipeline; the output end of the ultrasonic atomizer is connected to the gas pipeline through an atomization pipeline.

[0078] In the above technical solution, the glue for bonding the cutting tool can be conventional glue in the field, as long as it can bond the cutting tool to the billet and ensure that the cutting tool does not fall off during the cutting process, and the cutting tool can be removed by slightly heating after the cutting is completed. The present invention does not make any specific limitations on the type of glue.

[0079] In the above technical solution, the atomized water droplet flow merges into the positive pressure gas flow; the positive pressure gas flow pushes the atomized water droplet flow into the capillary and blows it out from the gap between the billet and the blade, thereby completing the cleaning of the capillary through blowing and atomized water droplets, and removing most of the glass fragments in the capillary.

[0080] In a specific embodiment of the present invention, the angle between the material flow direction in the atomizing pipeline and the material flow direction in the gas pipeline is ≤35°; the technical purpose of this arrangement is to make the atomized water droplet flow and the positive-pressure gas flow as parallel as possible, so that the positive-pressure gas can more efficiently push the atomized water droplets into the capillary for glass debris removal, and avoid the large difference in direction between the two causing the positive-pressure gas to impact the atomized water droplets, resulting in a reduction in the amount of atomized water droplets entering the capillary.

[0081] Furthermore, the present invention preferably sets the material flow direction in the atomization pipeline and the material flow direction in the gas pipeline at an angle of 25 to 35 degrees, so that the atomized water droplets can be pushed into the capillary tube with high efficiency and can be reasonably arranged in a smaller space; the atomization pipeline and the gas pipeline of the present invention form a Y-shaped structure.

[0082] The technical solution of the present invention is particularly suitable for capillaries with ultra-high aspect ratios that are difficult to cut and clean, and the typical dimensions are 10μm pore size, 100mm diameter, and 100mm length. In a specific embodiment of the present invention, the capillary pore size in the billet is 10μm; the particle size of the atomized water droplets is 3-5μm; the technical purpose of this structural setting is that the particle size of the atomized water droplets cannot be too large so that they can smoothly enter the capillary pores. The present invention preferably has a particle size of the atomized water droplets ≤ half of the capillary pore size; on the other hand, the particle size of the atomized water droplets cannot be too small, otherwise the impact effect on the glass fragments will be weak, and the removal effect on the glass fragments will also be weakened.

[0083] After the capillary array billet is cut at both ends, some uncleared glass debris may remain in the capillaries of the billet. In order to remove all the glass debris in the capillaries as much as possible to avoid adverse effects on the quality of the subsequent liquid scintillator optical fiber panel, the present invention preferably uses alkaline solution cleaning to completely remove the glass debris. Specifically, the billet with both ends cut is placed on a cleaning rack to expose the upper and lower core end faces, the prepared alkaline solution is poured into an ultrasonic cleaning machine, and the billet is placed in the ultrasonic cleaning machine for ultrasonication.

[0084] In a specific embodiment of the present invention, the billet is placed in a constant temperature hot alkali solution and ultrasonically treated to make the alkali react with the glass chips and dissolve the glass chips first. The purpose of using hot alkali solution is to better control the reaction speed and accelerate the dissolution of the glass chips.

[0085] In a specific embodiment of the present invention, the alkali solution is a sodium hydroxide solution or a potassium hydroxide solution; the temperature of the hot alkali solution is 55-65°C, at which the reaction and dissolution rate of the alkali and the glass fragments can be better controlled; ultrasound helps the reaction process; the present invention uses dual-frequency ultrasound to control the reaction process, firstly ultrasound is performed at a frequency of 40kHz in the hot alkali solution, and then ultrasound is performed at a frequency of 80kHz in the hot alkali solution.

[0086] Before cleaning with alkaline solution, it is preferred to perform ultrasonic treatment with anhydrous ethanol and repeatedly rinse with deionized water, the technical purpose of which is to first remove organic pollutants that may exist on the surface and in the channels of the capillary array.

[0087] After cleaning with alkali solution, rinse with deionized water; then let it stand to control the moisture, and then dry it in a vacuum oven to obtain high-quality billets.

[0088] The present invention will be further described below in conjunction with specific embodiments, but this should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by technicians in this field based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0089] Example 1

[0090] In this embodiment, the end face of the capillary array billet is cut, and the size of the capillary array billet is: capillary aperture 10 μm, diameter 100 mm, length 100 mm. The specific steps are as follows:

[0091] 1) Weigh 6g of component A epoxy resin glue and 1.5g of component B amine curing agent and mix them evenly; apply the mixed glue evenly to the edge area outside the core area at the second end of the billet; pay attention that the glue cannot enter the core area to prevent the capillary from being blocked; bond the cutting tool to the second end of the billet so that its annular body corresponds to the effective area position of the billet; let it stand for 2 hours.

[0092] 2) Install four flat duckbill joints with a width of 60 mm and a thickness of 2 mm, two above and two below the blade of the vertical cutting machine, and adjust the water outlet position so that the port and surface of the blade can be effectively cooled and lubricated.

[0093] 3) Place the high-pressure water pump into the water tank and fill the water tank with water through the water supply pipe. Pay attention to timely water storage during the subsequent cutting process; install an independent drain pipe at the bottom of the cutting fluid receiving tank under the blade and connect it to the drain position to discharge the used cutting fluid.

[0094] 4) The capillary array billet bonded with the cutting tool after being allowed to stand is fixed on the vertical cutting machine through a billet fixing fixture equipped with a rotating angle table; and the air vent of the cutting tool is connected to the positive pressure blowing pipeline.

[0095] 5) Adjust the mechanical arm of the vertical cutting machine so that the angle between the axis of the capillary array billet and the horizontally set blade is 90°±1°, set the spindle blade speed to 2200r / min, and the cutting speed to 5mm / min, turn on the positive pressure blowing, adjust the pressure to 0.6MPa, turn on the water cutting fluid injection switch, and cut the capillary array billet.

[0096] 6) After the first cut, rotate the capillary array billet 180° using the rotating angle table; apply a mixture of 6g of A glue and 1.5g of B glue evenly to the edge area outside the core area at the first end of the billet; note that the glue cannot enter the core area to prevent the capillaries from being blocked; bond the cutting tool to the first end of the billet so that its annular body corresponds to the effective area position of the billet; let it stand for 2 hours.

[0097] 7) Cut the second end of the billet according to step 4) and step 5).

[0098] 8) Remove the cutting tool; place the capillary array billet with both ends cut flat on the cleaning rack, leaving the upper and lower core area end faces exposed. Figure 8 As shown, 6 is an ultrasonic cleaning machine, 8 is a capillary array billet, and 9 is an alkali solution; in this embodiment, the alkali solution adopts a sodium hydroxide solution with a mass concentration of 10%, and the ratio is: 70g sodium hydroxide is dissolved in 630mL deionized water.

[0099] 9) Clean according to the following cleaning process:

[0100] 9a) using anhydrous ethanol and sonicating at a frequency of 40 kHz for 15 min at room temperature;

[0101] 9b) using deionized water, performing dual-frequency ultrasound at a frequency of 40 kHz and 80 kHz for a total of 10 minutes at room temperature; the dual-frequency ultrasound was performed by switching the frequency once every 1 minute, and the frequencies of 40 kHz and 80 kHz were alternately ultrasounded;

[0102] 9c) using deionized water, repeatedly rinse the billet at room temperature for 20 minutes without ultrasound;

[0103] 9d) using a sodium hydroxide solution with a mass concentration of 10%, ultrasonically treating at a frequency of 40 kHz for 15 min at 60°C;

[0104] 9e) using deionized water, performing dual-frequency ultrasound at a frequency of 40 kHz and 80 kHz for a total of 10 minutes at room temperature; the dual-frequency ultrasound was performed by switching the frequency once every 1 minute, and the frequencies of 40 kHz and 80 kHz were alternately ultrasounded;

[0105] 9f) using deionized water, repeatedly rinse the billet at room temperature for 20 minutes without ultrasound;

[0106] 9g) using a sodium hydroxide solution with a mass concentration of 10%, ultrasonically treating at a frequency of 80 kHz for 15 min at 60°C;

[0107] 9h) using deionized water, and performing dual-frequency ultrasound at a frequency of 40 kHz and 80 kHz for a total of 10 min at room temperature; the dual-frequency ultrasound was switched once every 1 minute, and the frequencies of 40 kHz and 80 kHz were alternately ultrasounded;

[0108] 9i) using deionized water, repeatedly rinse the billet at room temperature for 20 minutes without ultrasound;

[0109] 9j) leaving the mixture at room temperature for 24 hours to remove the water;

[0110] 9k) Dry in a vacuum oven at 120°C for 60 min.

[0111] The roughness of the two end surfaces of the capillary array tested by confocal microscopy was 5 μm, and the pore blocking rate of the capillary array channel was 14%.

[0112] Example 2

[0113] The same as Example 1, except that atomized water droplets are introduced into the forward blowing air, the particle size of the atomized water droplets is 3-5 μm, and the angle between the atomized water droplet flow and the forward blowing air flow is 30°.

[0114] The roughness of the two end surfaces of the capillary array tested by confocal microscopy was 5 μm, and the pore blocking rate of the capillary array channel was 5%.

[0115] Comparative Example 1

[0116] The same as Example 1, except that a single cylindrical cooling tube is used for cooling, positive pressure blowing is not used during cutting, the capillary array is not flipped 180°, and a subsequent alkaline washing process is not used.

[0117] The roughness of one end surface of the capillary array was tested by confocal microscopy and was found to be 20 μm, the roughness of the other end surface was 40 μm, and the pore blocking rate of the capillary array channel was 80%.

[0118] It can be seen from the above-mentioned embodiments and comparative data that the technical solution of the present invention can greatly improve the quality of the cut end face of the capillary array, the end face roughness is only 5μm, and the quality consistency of the two end faces can be ensured; and, the technical solution of the present invention can more effectively remove contaminants in the capillary array during the slicing process, thereby improving the cleanliness, avoiding or slowing down the channel clogging of the capillary array, and the channel clogging rate of the capillary array is only 14%, as shown in Example 1, which is greatly improved compared with the channel clogging rate of 80% of the comparative example, and has a good technical effect.

[0119] Furthermore, the introduction of atomized droplets of a specific particle size into the forward blowing can further improve the removal of pollutants in the capillary array, further improve the cleanliness, avoid or slow down the channel clogging of the capillary array, and the channel clogging rate of the capillary array is only 5%, as shown in Example 2, which is a greater improvement than the channel clogging rate of 80% in the control example, and has a better technical effect.

[0120] The technical features in the claims and / or the specification of the present invention may be combined, and the combination is not limited to the combination obtained by reference in the claims. The technical solution obtained by combining the technical features in the claims and / or the specification is also within the protection scope of the present invention.

[0121] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A method for cutting a capillary array billet, the billet comprising a first end and a second end, characterized in that: It includes the following steps: S1: fix the billet in a vertical axis manner; the first end is downward and the second end is upward; use water as cutting fluid and cut the billet at a preset cutting position close to the first end with a horizontally arranged blade; During the cutting process, positive pressure gas is introduced from the top of the billet and blown into the capillary; S2: turning the billet 180 degrees; using water as cutting fluid, and cutting the billet at a preset cutting position close to the second end with a horizontally arranged blade; During the cutting process, positive pressure gas is introduced from the top of the billet and blown into the capillary; S3 uses alkali solution to clean the billet segments cut at both ends; cleans with deionized water; and dries.

2. The method according to claim 1, characterized in that The water is provided by a high-pressure water pump and sprayed toward the port and upper and lower surfaces of the blade, acting on the position where the blade contacts the billet.

3. The method according to claim 2, characterized in that The water is sprayed from a plurality of spray ports; the water outlet width of the spray ports is greater than or equal to the billet diameter.

4. The method according to claim 1, characterized in that: The positive pressure gas is mixed with atomized water droplets; the atomized water droplet flow merges into the positive pressure gas flow, the positive pressure gas flow pushes the atomized water droplet flow into the capillary, and is blown out from the gap between the billet and the blade.

5. The method according to claim 1, characterized in that The pressure of the positive pressure gas is ≤0.6MPa.

6. The method according to claim 4, characterized in that The capillary pore size in the billet is 10 μm; the particle size of the atomized water droplets is 3 to 5 μm.

7. The method according to claim 4, characterized in that The material flow direction in the atomization pipeline and the material flow direction in the gas pipeline form an angle of 25 to 35 degrees.

8. The method according to claim 1, characterized in that The alkali cleaning comprises placing the billet with both ends cut in a constant temperature hot alkali solution for ultrasonic treatment to make the alkali react with the glass fragments.

9. The method according to claim 8, characterized in that The alkali solution is a sodium hydroxide solution or a potassium hydroxide solution; the temperature of the hot alkali solution is 55-65° C.; the ultrasound comprises: ultrasound at a frequency of 40 kHz in the hot alkali solution, and then ultrasound at a frequency of 80 kHz in the hot alkali solution.

10. A capillary array billet cutting system, characterized in that: It includes: A vertical cutting machine comprises a mechanical arm and a blade; a billet fixing fixture is provided at one end of the mechanical arm; A rotating angle table, arranged on the billet fixing fixture; A water pump is arranged on one side of the vertical cutting machine; A plurality of injection ports are arranged above and below the blade; the injection ports are connected to the water pump; The cutting tool comprises an annular body; the inner diameter of the annular body matches the effective area diameter of the billet to be cut; the cutting tool also comprises a top cover; the top cover is provided with a vent; A gas source connected to the vent via a gas pipeline; An ultrasonic atomizer, the output end of which is connected to the gas pipeline via an atomization pipeline; Ultrasonic cleaning machine is used to clean the billet that has been cut at both ends.

11. The system according to claim 10, characterized in that The injection port is a flat duckbill structure; the width of the injection port is greater than or equal to the diameter of the billet.

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