DCT coil straight tube skeleton manufacturing method

Abstract

The present invention provides a method for manufacturing a DCT coil straight tube skeleton, comprising: determining design parameters of each layer of skeletons of a DCT coil straight tube to be formed; establishing a three-dimensional mechanical model of the DCT coil straight tube skeleton based on the design parameters; intercepting a skeleton assembly unit model from a periodic segment of the three-dimensional mechanical model; batch manufacturing skeleton assembly units based on the skeleton assembly unit model; assembling the skeleton assembly units to form a DCT coil straight tube. By adopting a segmented assembly molding method, the manufacturing difficulty can be reduced, and the problems of large machining volume, high cost and long cycle in the one-piece molding process can be solved. And it can be applicable to DCT coil straight tube skeletons of different sizes and shapes, taking into account both dimensional accuracy and production efficiency. In addition, the segmented assembly method can determine the number of assembled sections according to the actual length of the straight tube, avoiding the waste of materials, and the skeleton material selection and manufacturing method are more flexible and diversified.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing special-shaped superconducting magnet skeletons, and in particular to a method for manufacturing a DCT coil straight tube skeleton. Background Art

[0002] The DCT (Discrete-Cosine-Theta) coil structure is a new type of magnet structure with the characteristics of high magnetic field quality, light and compact, small cold mass and easy optimization. It is gradually used in the design of particle accelerators and medical accelerator magnets. The coil includes Walstrom ends and an intermediate area with a specific periodic distribution in the cross section. By optimizing the spatial arrangement of the wires, an ideal dipole, quadrupole, sextupole or combined functional magnetic field can be generated within the coil aperture. In addition, the DCT superconducting coil is fixed by the wire grooves on the surface of the skeleton, which can effectively block the accumulation of Lorentz force between the coil turns, and the mechanical properties of the magnet are outstanding.

[0003] At present, the most commonly used manufacturing method for DCT coil straight tube skeletons is to use CNC machine tools to process wire grooves on the surface of the finished straight tube cylinder. The cylinder is usually made of stainless steel, aluminum alloy and G10. Since the production of non-standard straight tube cylinders requires additional tooling and molds, and the internal and external roundness and thickness of the large-aperture skeleton cannot be guaranteed, it affects the processing accuracy of the surface wire grooves and the nested assembly of multi-layer skeletons. At the same time, the cycle of using CNC machine tools to process the entire cylinder is long, the cost is high, and a large-stroke machine tool equipment is required, which also restricts the development of DCT superconducting magnet technology. Summary of the invention

[0004] The present invention provides a method for manufacturing a DCT coil straight tube skeleton, so as to solve the related defects in the prior art. The DCT coil straight tube skeleton is assembled in sections to reduce the manufacturing difficulty and solve the problems of large machining amount, high cost and long cycle in the one-piece molding process.

[0005] The present invention provides a method for manufacturing a DCT coil straight tube skeleton, comprising:

[0006] Determine the design parameters of each layer of the skeleton of the DCT coil straight tube to be formed;

[0007] Based on the design parameters, a three-dimensional mechanical model of the DCT coil straight tube skeleton is established;

[0008] Extracting a skeleton assembly unit model from a periodic segment of the three-dimensional mechanical model;

[0009] Based on the skeleton assembly unit model, batch manufacturing skeleton assembly units;

[0010] The skeleton assembly units are assembled to form the DCT coil straight tube.

[0011] According to the DCT coil straight tube skeleton manufacturing method provided by the present invention, the skeleton assembly unit model is intercepted from the periodic segment of the three-dimensional mechanical model, comprising:

[0012] Cutting out a ring-shaped model of a set length from a periodic segment of the three-dimensional mechanical model;

[0013] The annular model is used as the skeleton assembly unit model, or the annular model is periodically intercepted again along the circumferential direction to form a plurality of the skeleton assembly unit models.

[0014] According to the DCT coil straight tube skeleton manufacturing method provided by the present invention, when the annular model is used as the skeleton assembly unit model, the skeleton assembly units are batch manufactured based on the skeleton assembly unit model, including:

[0015] Based on the skeleton assembly unit model, a plurality of annular skeleton assembly units are manufactured in batches.

[0016] According to the method for manufacturing a DCT coil straight tube skeleton provided by the present invention, assembling the skeleton assembly units comprises:

[0017] Arranging a plurality of the annular skeleton assembly units along the axial direction;

[0018] Two adjacent skeleton assembly units are connected to each other.

[0019] According to the DCT coil straight tube skeleton manufacturing method provided by the present invention, when the annular model is periodically intercepted again along the circumferential direction to form a plurality of skeleton assembly unit models, the skeleton assembly units are batch manufactured based on the skeleton assembly unit models, including:

[0020] Based on a plurality of the skeleton assembly unit models, a plurality of the skeleton assembly units are manufactured in batches.

[0021] According to the method for manufacturing a DCT coil straight tube skeleton provided by the present invention, assembling the skeleton assembly units comprises:

[0022] Assembling a plurality of the skeleton assembly units along a circumferential direction to form an annular assembly structure;

[0023] Arrange a plurality of the annular assembled structures along the axial direction;

[0024] Two adjacent annular assembly structures are connected to each other.

[0025] According to the DCT coil straight tube skeleton manufacturing method provided by the present invention, the skeleton assembly unit is manufactured by one or more methods of CNC machine tool processing, 3D printing technology and injection molding, and / or the material of the skeleton assembly unit is selected from metal and / or non-metal, the metal at least includes any one or more combinations of stainless steel, copper, and aluminum alloy, and the non-metal at least includes any one or more combinations of G10 / G11, nano-ceramic materials, and PEEK / PEI special engineering clinker.

[0026] According to the method for manufacturing a DCT coil straight tube skeleton provided by the present invention, after forming the DCT coil straight tube, the method further comprises:

[0027] End structures are respectively assembled at opposite ends of the DCT coil straight tube to form a DCT coil straight tube skeleton.

[0028] According to the method for manufacturing a DCT coil straight tube skeleton provided by the present invention, the design parameters include inner and outer radii, mechanical length, cross-sectional azimuth distribution, and wire slot size.

[0029] According to the method for manufacturing a DCT coil straight tube skeleton provided by the present invention, the cross-sectional shape of the annular model includes a circle, an ellipse, and a rectangle.

[0030] The manufacturing method of the straight tube skeleton of the DCT coil provided by the present invention first establishes a three-dimensional mechanical model of the straight tube skeleton of the DCT coil before batch manufacturing, cuts out the skeleton assembly unit model in the periodic segment of the three-dimensional mechanical model, and batch manufactures the skeleton assembly units based on the skeleton assembly unit model, and then assembles them. By adopting the segmented assembly molding method, the manufacturing difficulty can be reduced, and the problems of large machining amount, high cost and long cycle in the one-piece molding process are solved. And the manufacturing method of the present invention can be applied to DCT coil straight tube skeletons of different sizes and shapes, taking into account dimensional accuracy and production efficiency. In addition, the segmented assembly method can determine the number of assembly sections according to the actual length of the straight tube, avoiding the waste of materials, and the skeleton material selection and manufacturing method are more flexible and diversified. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a flow chart of the method for manufacturing the DCT coil straight tube skeleton provided by the present invention;

[0033] Figure 2 This is one of the structural schematic diagrams of the DCT coil straight tube skeleton provided by the present invention;

[0034] Figure 3 This is the second structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0035] Figure 4 This is the third structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0036] Figure 5 This is the fourth structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0037] Figure 6 This is the fifth structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0038] Figure 7 This is the sixth structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0039] Figure 8 This is the seventh structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0040] Fig. 9 This is the eighth structural schematic diagram of the DCT coil straight tube skeleton provided by the present invention;

[0041] Reference numerals:

[0042] 100: DCT coil straight tube skeleton manufacturing method; 102-110: various steps;

[0043] 200: DCT coil straight tube skeleton; 202: skeleton assembly unit; 204: skeleton assembly unit; 206: annular assembly structure;

[0044] 300: pin hole; 302: positioning strip; 304: I-shaped card;

[0045] 400: inner radius; 402: outer radius; 404: mechanical length; 406: cross-sectional azimuth. DETAILED DESCRIPTION

[0046] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] See now Figures 1 to 9The embodiments of the present invention are described. It should be understood that the following description is only an illustrative embodiment of the present invention and does not constitute any particular limitation to the present invention.

[0052] First, Figure 1 As shown, an embodiment of the present invention provides a method 100 for manufacturing a straight tube skeleton of a DCT coil. The method 100 for manufacturing a straight tube skeleton of a DCT coil may generally include the following steps:

[0053] First, in step 102, the design parameters of each layer of the skeleton of the DCT coil straight tube to be formed are determined;

[0054] Then, in step 104, based on the design parameters as described above, a three-dimensional mechanical model of the DCT coil straight tube skeleton is established;

[0055] Next, in step 106, a skeleton assembly unit model is intercepted from the periodic segment of the three-dimensional mechanical model as described above;

[0056] Then, in step 108, the skeleton assembly units are mass-produced based on the skeleton assembly unit models intercepted as described above;

[0057] Finally, in step 110, the batch-produced skeleton assembly units are assembled to form a DCT coil straight tube.

[0058] Specifically, in the actual application process of the embodiment of the present invention, firstly, various design parameters of the skeletons of each layer of the DCT coil straight tube to be formed are determined according to the electromagnetic scheme of the superconducting magnet. In an optional embodiment, for example, the design parameters may include the inner radius 400, the outer radius 402, the mechanical length 404, the cross-sectional azimuth 406 distribution and the wire slot size of each layer of the skeleton of the DCT coil straight tube. Then, according to the above parameters, a three-dimensional mechanical model of the DCT coil straight tube skeleton can be established; next, according to the manufacturing needs, the skeleton assembly unit model can be intercepted from the periodic segment of the three-dimensional mechanical model, for example, a circular ring with a certain straight segment length range can be intercepted as the skeleton assembly unit model, which will be described in detail below. Then, according to the intercepted skeleton assembly unit model, the skeleton assembly unit is batch manufactured. Finally, the DCT coil straight tube skeleton can be assembled according to the wire slot alignment, and the end structures are respectively assembled at the opposite ends of the DCT coil straight tube, so as to form a complete DCT coil straight tube skeleton.

[0059] Therefore, according to the embodiments described above, in the DCT coil straight tube skeleton manufacturing method 100 provided by the present invention, a three-dimensional mechanical model of the DCT coil straight tube skeleton is first established before batch manufacturing, and the skeleton assembly unit model is cut out in the periodic segment of the three-dimensional mechanical model, and based on the skeleton assembly unit model, the skeleton assembly units are batch manufactured, and then assembled. By adopting the segmented assembly molding method, the manufacturing difficulty can be reduced, and the problems of large machining amount, high cost and long cycle in the one-piece molding process are solved. And the manufacturing method of the present invention can be applied to DCT coil straight tube skeletons of different sizes and shapes, taking into account dimensional accuracy and production efficiency. In addition, the segmented assembly method can determine the number of assembly segments according to the actual length of the straight tube, avoiding the waste of materials, and the skeleton material selection and manufacturing method are more flexible and diversified.

[0060] See also Figures 2 to 9 , which respectively show the structural schematic diagrams of various embodiments of the DCT coil straight tube skeleton 200 manufactured by the DCT coil straight tube skeleton manufacturing method 100 of the present invention.

[0061] In the DCT coil straight tube skeleton manufacturing method 100 of the present invention, the step of extracting the skeleton assembly unit model from the periodic segment of the three-dimensional mechanical model may specifically include the following steps:

[0062] A ring-shaped model of a set length is cut out from the periodic segment of the three-dimensional mechanical model as described above;

[0063] In one embodiment, if Figure 2 and Figure 3 As shown, the ring-shaped model can be directly used as the skeleton assembly unit model to carry out subsequent manufacturing processes; in another embodiment, as Figure 2 , Figures 4 to 9 As shown, the annular model can also be periodically intercepted again along the circumferential direction to form multiple skeleton assembly unit models, so as to carry out subsequent manufacturing processes.

[0064] In other words, in the embodiment of the present invention, the form of the skeleton assembly unit model is not limited to any one or several specific forms. If necessary, the cut-out ring model can be directly used as the skeleton assembly unit model, such as Figure 3 In another embodiment, the annular model may be periodically intercepted again along the circumferential direction, for example, multiple arc segments are intercepted, so that each arc segment is used as a skeleton assembly unit model, such as Figure 4 In other words, the form of the skeleton assembly unit model can be selected according to actual needs, and the present invention is not limited to one or some specific forms.

[0065] Furthermore, since the form of the skeleton assembly unit model can be selected according to actual needs, the form of the skeleton assembly units manufactured in batches based on the skeleton assembly unit model can also be selected, that is, the form of the skeleton assembly units manufactured in batches corresponds to the skeleton assembly unit model.

[0066] For example, in an optional embodiment, Figure 2 and Figure 3 As shown, when the ring model as described above is directly used as the skeleton assembly unit model, based on the skeleton assembly unit model, the step of batch manufacturing the skeleton assembly units may further include:

[0067] Based on the skeleton assembly unit model, a plurality of ring-shaped skeleton assembly units 202 are manufactured in batches.

[0068] Correspondingly, when assembling the skeleton assembly unit 202, the following steps can be performed:

[0069] Arrange the plurality of annular skeleton assembly units 202 along the axial direction;

[0070] Then two adjacent skeleton assembly units 202 are connected to each other.

[0071] For example, in another optional embodiment, Figure 2 , Figures 4 to 9 As shown, when the annular model is periodically intercepted again along the circumferential direction to form multiple skeleton assembly unit models, the step of batch manufacturing skeleton assembly units based on the skeleton assembly unit models may further include:

[0072] Based on multiple skeleton assembly unit models, multiple skeleton assembly units 204 are batch manufactured. At this time, the skeleton assembly units 204 are constructed in the form of arc segments.

[0073] Correspondingly, when assembling the skeleton assembly unit 204, the following steps can be performed:

[0074] The plurality of skeleton assembly units 204 are first assembled along the circumferential direction to form an annular assembly structure 206;

[0075] Then, the plurality of annular assembled structures 206 are arranged again along the axial direction;

[0076] Finally, two adjacent annular assembly structures 206 are connected to each other.

[0077] It should be noted again that, according to the above-described embodiments, the above-described embodiments are only illustrative embodiments of the present invention and do not constitute any particular limitation to the present invention. The skeleton assembly unit finally made for assembly can be a skeleton assembly unit 202 in an annular form, or a skeleton assembly unit 204 in an arc form. The form of the skeleton assembly unit can be designed according to the specific needs of the present invention. In other words, the annular structure can be in any form of a whole, two halves, or intercepted according to the distribution period of the wire groove.

[0078] In addition, it should be noted that in the embodiments of the present invention, the cross-sectional shape of the annular model may include any shapes such as a circle, an ellipse, a rectangle, etc. In other words, the cross-sectional shape of the annular structure assembled by the skeleton assembly unit may also correspond to any shapes such as a circle, an ellipse, a rectangle, etc. In an optional embodiment, the cross-sectional current density of the DCT coil straight tube skeleton needs to satisfy the Cos(nθ) distribution, and the intermediate structure wire slot distribution has a certain periodicity.

[0079] Further, in an optional embodiment, the annular skeleton assembly unit 202 or the arc-shaped skeleton assembly unit 204 can be processed and manufactured by CNC machine tool processing, 3D printing, injection molding and other methods. In addition, the corresponding dimensions should be specifically determined in combination with different manufacturing methods. For example, CNC machine tool processing mainly considers factors such as processing cost and precision; 3D printing mainly considers factors such as material cost, material strength, and printing size limitation; injection molding mainly considers factors such as demoulding angle and shrinkage coefficient. Under low temperature conditions, according to different manufacturing methods, the material can be selected from metal (a combination of any one or more of stainless steel, copper, aluminum alloy, etc.) and / or non-metal (a combination of any one or more of G10 / G11, nano-ceramic materials, PEEK / PEI special engineering clinker, etc.); when the injection molding process is used for manufacturing, the unit requires that the thickness of the wire slot interval fin is greater than 1mm, the maximum length is less than 100mm, and the wire slot density distributed along the circumference should be as consistent as possible.

[0080] In addition, in one embodiment, when arc-shaped skeleton assembly units 204 are used, the number of units is selected based on the ratio of the size of the skeleton intermediate structure to the size of the skeleton unit.

[0081] On the other hand, the present invention also provides a DCT coil straight tube skeleton 200, which can be made by the DCT coil straight tube skeleton manufacturing method as described above. In one embodiment, the DCT coil straight tube skeleton 100 may include a plurality of annular assembly structures, and these annular assembly structures may be interconnected in the axial direction. In an optional embodiment, the annular assembly structure may be directly used as a skeleton assembly unit 202, and when the axial connection is performed, a pin hole 300 may be provided on the annular assembly structure, and a positioning strip 302 passing through the pin hole 300 may be used to connect two adjacent annular assembly structures together, such as Figures 6 to 9 shown.

[0082] Furthermore, in another optional embodiment, each annular assembly structure may further include a plurality of skeleton assembly units, and the plurality of skeleton assembly units may be spliced ​​together along the circumferential direction to form an annular assembly structure. In this embodiment, a plurality of arc-shaped skeleton assembly units may be first connected to each other along the circumferential direction using a connector such as an I-shaped clip 304, thereby forming an annular assembly structure; then, the plurality of annular assembly structures may be connected to each other along the axial direction using the pin hole 300 and the positioning strip 302 as described above, such as Figures 5 to 9 shown.

[0083] By the above-mentioned method, the assembly and assembling of the DCT coil straight tube skeleton 200 can be realized. In addition, by using the above-mentioned method, the positioning accuracy and structural stability of the batch-assembled DCT coil straight tube skeleton can be guaranteed.

[0084] Of course, it should be understood that the above are only optional embodiments of the present invention, and the specific assembly structure can be selected according to actual conditions. The present invention is not limited to one or some specific embodiments.

[0085] In summary, in the DCT coil straight tube skeleton manufacturing method 100 and the DCT coil straight tube skeleton 200 provided in the embodiments of the present invention, the DCT coil straight tube skeleton adopts a segmented assembly molding method, which can reduce the manufacturing difficulty and solve the problems of large machining amount, high cost and long cycle in the one-piece molding process. In addition, the present invention can be applied to DCT coil straight tube skeletons of different sizes and shapes, and can take into account both dimensional accuracy and production efficiency. Furthermore, the segmented assembly method can determine the number of assembled sections according to the actual length of the straight tube, avoiding the waste of materials, and the skeleton material selection and manufacturing method are more flexible and diversified. In addition, in actual production, the injection molding process can be used, and the wire trough does not need to be processed. The production is convenient and fast, and the consistency is high, which can effectively improve the skeleton manufacturing efficiency.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a DCT coil straight tube skeleton, characterized in that: include: Determine the design parameters of each layer of the skeleton of the DCT coil straight tube to be formed; Based on the design parameters, a three-dimensional mechanical model of the DCT coil straight tube skeleton is established; Cutting out a ring-shaped model of a set length from a periodic segment of the three-dimensional mechanical model; The annular model is periodically intercepted again along the circumferential direction to form a plurality of skeleton assembly unit models; Based on the plurality of skeleton assembly unit models, batch manufacture a plurality of skeleton assembly units; Assembling a plurality of the skeleton assembly units along a circumferential direction using I-shaped clips to form an annular assembly structure; Arrange a plurality of the annular assembled structures along the axial direction; Two adjacent annular assembly structures are connected to each other by using pin holes and positioning bars to form the DCT coil straight tube.

2. The method for manufacturing a DCT coil straight tube skeleton according to claim 1, characterized in that: The skeleton assembly unit is manufactured by one or more methods including CNC machine tool processing, 3D printing technology and injection molding, and / or the material of the skeleton assembly unit is metal and / or non-metal, the metal includes at least one or more combinations of stainless steel, copper, and aluminum alloy, and the non-metal includes at least one or more combinations of G10 / G11, nano-ceramic materials, and PEEK / PEI special engineering clinker.

3. The method for manufacturing a DCT coil straight tube skeleton according to claim 1, characterized in that: After forming the DCT coil straight tube, the method further includes: End structures are respectively assembled at opposite ends of the DCT coil straight tube to form a DCT coil straight tube skeleton.

4. The method for manufacturing a DCT coil straight tube skeleton according to claim 1, characterized in that: The design parameters include inner and outer radii, mechanical length, cross-sectional azimuth distribution, and wire trough dimensions.

5. The method for manufacturing a DCT coil straight tube skeleton according to claim 1, characterized in that: The cross-sectional shape of the annular model includes a circle, an ellipse, and a rectangle.

Images