Large thin-walled hyperbolic cold screen fan panel forming device, forming method and cold screen

Abstract

The present invention discloses a large-scale thin-walled hyperbolic cold shield segment panel forming device, forming method, and cold shield, belonging to the technical field of nuclear fusion devices. Specifically, in the forming device, a second rolling assembly and a first rolling assembly are spaced apart in the X direction, and a third rolling assembly is arranged above the first rolling assembly and the second rolling assembly; a plurality of first columns, a plurality of second columns, and a plurality of third columns are arranged linearly along the Y direction, and the plurality of first columns and the plurality of second columns can independently move in the Z direction and the X direction, and the plurality of third columns can independently move in the Z direction; a plurality of first rollers, a plurality of second rollers, and a plurality of third rollers are correspondingly arranged on the upper ends of the plurality of first columns, the upper ends of the plurality of second columns, and the lower ends of the plurality of third columns. The forming device has good versatility and low cost, can improve the forming accuracy of the curved panel, can improve the production efficiency of large-scale thin-walled hyperbolic cold shield segments, and can effectively reduce the deformation of large thin sections during welding.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear fusion devices, and in particular to a large-scale thin-walled hyperbolic cold shield segment panel forming device, a forming method and a cold shield. Background Art

[0002] To advance research into controlled nuclear fusion energy utilization, a new, large-scale, compact vacuum chamber cold shield structure was designed during the construction of a new compact fusion energy experimental device. The cold shield is located in a narrow gap outside the vacuum chamber and within the longitudinal field coil magnet, completely enveloping the vacuum chamber and isolating it from the magnet components. The cold shield is a thin-walled, rotating body structure divided into multiple sectors along the circumference of the rotation. The rotating cross-sections are multiple D-shaped closed curves of varying curvature. The cold shield sectors are large, with a top-to-bottom distance of 6 meters or greater and a maximum inside-outside distance of 4 meters or greater.

[0003] The characteristics of vacuum chamber cold shield segment panels are high strength, high resilience, and high surface precision requirements. The current problem is that due to the large size of the vacuum chamber cold shield segment, the vacuum chamber cold shield segment is generally divided into a large number of curved panels (generally no less than eight segments) along the D-shaped circumferential direction. Multiple sets of press molds are customized according to the curvature and surface size of each curved panel segment. Because the upper and lower press mold surfaces of the press molds are fixed shapes and lack universality, the cost of the curved panel press molds required for cold shield segment processing is very high. In addition, after the multiple curved panels are formed separately, they need to be welded together to obtain large thin-walled hyperbolic cold shield segments. This results in a large welding process and a heavy workload, resulting in low production efficiency for large thin-walled hyperbolic cold shield segments, and it is difficult to control the welding deformation of the panels of large thin-walled hyperbolic cold shield segments. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, a first aspect of the present invention provides a large, thin-walled, hyperbolic cold shield segment panel forming device that is versatile, low-cost, and capable of improving the curved panel forming accuracy, increasing the production efficiency of large, thin-walled, hyperbolic cold shield segments, and effectively reducing welding deformation.

[0005] A large thin-walled hyperbolic cold shield segment panel forming device according to an embodiment of the present invention comprises:

[0006] a first rolling assembly, the first rolling assembly comprising a plurality of first columns and a plurality of first rollers, the plurality of first columns being linearly spaced apart along the Y direction, the plurality of first columns being independently movable along the Z direction and the X direction; the plurality of first rollers being rotatably disposed at upper ends of the plurality of first columns in a one-to-one correspondence, with the rotation axes of the plurality of first rollers extending along the Y direction;

[0007] a second rolling assembly, the second rolling assembly being spaced apart from the first rolling assembly in the X direction, the second rolling assembly comprising a plurality of second posts and a plurality of second rollers, the plurality of second posts being linearly spaced apart along the Y direction, the plurality of second posts being independently movable in the Z direction and the X direction; the plurality of second rollers being rotatably disposed on the upper ends of the plurality of second posts in a one-to-one correspondence, and the rotation axes of the plurality of second rollers extending along the Y direction;

[0008] The third rolling assembly is arranged above the first rolling assembly and the second rolling assembly. The third rolling assembly includes multiple third columns and multiple third rollers. The multiple third columns are arranged in a straight line and spaced apart along the Y direction. The multiple third columns can be independently moved along the Z direction. The multiple third rollers are rotatably arranged at the lower ends of the multiple third columns in a one-to-one correspondence, and the rotation axes of the multiple third rollers extend along the Y direction.

[0009] Compared with the prior art, the large thin-walled hyperbolic cold screen segment panel forming device of the first embodiment of the present invention has the following advantages: since the first column and the second column can move independently in the Z direction and can move independently in the X direction, and the third column can move independently in the Z direction, the Z-direction spacing between the plurality of first rollers, the plurality of second rollers and the plurality of third rollers and the X-direction spacing between the first roller and the second roller can be adjusted. On the one hand, the large thin-walled hyperbolic cold screen segment panel forming device of the first embodiment of the present invention can form each of the large thin-walled hyperbolic cold screen segments to be formed along the D-shaped annular division. The curved panels are formed with good versatility, which greatly reduces the manufacturing cost of the large thin-walled hyperbolic cold screen segment panel forming mold, thereby reducing the processing cost of the large thin-walled hyperbolic cold screen segment; on the other hand, the curved panels with high contour dimensional accuracy can be produced; on the other hand, the curved panels to be formed, which are smaller in number and larger in size and divided along the D-shaped annular direction of the large thin-walled hyperbolic cold screen segment, can be formed. In this way, a smaller number of the curved panels are formed and then welded to obtain a large thin-walled hyperbolic cold screen segment, with fewer welding times and reduced welding workload, thereby improving the production efficiency of the large thin-walled hyperbolic cold screen segment and effectively reducing welding deformation.

[0010] In some embodiments, the plurality of first columns and the plurality of second columns are arranged one-to-one opposite each other in the X direction, the plurality of first columns and the plurality of second columns are arranged one-to-one opposite each other on the YZ projection plane, and the plurality of first rollers and the plurality of second rollers are arranged one-to-one opposite each other on the YZ projection plane.

[0011] In some embodiments, the cross-section of the outer circumference of the plurality of first rollers, the plurality of second rollers, and the plurality of third rollers in the Y direction is convex arc-shaped.

[0012] In some embodiments, the outer diameters of the plurality of first rollers are the same, the outer diameters of the plurality of second rollers are the same, and the outer diameters of the plurality of third rollers are the same.

[0013] In some embodiments, it also includes a first base and a second base, and the first base and the second base are arranged with an upper and lower interval in the Z direction; the first rolling assembly, the second rolling assembly and the third rolling assembly are located between the first base and the second base, the lower ends of the plurality of first columns and the lower ends of the plurality of second columns are connected to the first base, and the upper ends of the plurality of third columns are connected to the second base.

[0014] The second aspect of the present invention provides a method for forming a large-scale thin-walled hyperbolic cold screen segment panel.

[0015] According to the large thin-walled hyperbolic cold shield segment panel forming method of the second embodiment of the present invention, the large thin-walled hyperbolic cold shield segment panel is a curved panel to be formed by dividing the large thin-walled hyperbolic cold shield segment along the D-shaped annular direction. The number of curved panels to be formed by dividing a single large thin-walled hyperbolic cold shield segment along the D-shaped annular direction is 2 to 4, including a C-shaped hyperbolic panel located on the outside from the top to the bottom of the large thin-walled hyperbolic cold shield segment; the curved panel is formed using the large thin-walled hyperbolic cold shield segment panel forming device of the first embodiment of the invention, comprising the following steps:

[0016] S1: blanking; blanking the plate according to the unfolded size of the curved plate to be formed plus the processing allowance to obtain the plate to be formed;

[0017] S2: One-time bending forming: according to the curvature distribution of the first bending direction of the curved panel to be formed, the rotational speeds of all the first rollers, all the second rollers and all the third rollers are pre-set to the same speed, and the Z-direction spacing between the plurality of the first rollers, the plurality of the second rollers and the plurality of the third rollers and the X-direction spacing between the first roller and the second roller in the one-time rolling process are pre-set by a computer program, wherein the first bending direction is consistent with the D-shaped annular direction of the large thin-walled hyperbolic cold shield segment; the sheet to be formed is fed along the X direction between the third roller and the first roller and the second roller, and the one-time curved surface forming in the first bending direction is completed by a continuous feeding method to obtain a one-time bent sheet;

[0018] S3: Secondary bending forming: setting the Z-direction heights of the plurality of first rollers, the plurality of second rollers, and the plurality of third rollers along the Y-direction according to the curvature distribution of the curved panel to be formed in the second bending direction, wherein the second bending direction is perpendicular to the first bending direction; feeding the primary bent panel from the X-direction into a space between the third roller, the first roller, and the second roller, completing secondary curved surface forming in the second bending direction by continuous feeding, thereby obtaining a secondary bent panel;

[0019] S4: Contour dimension deviation measurement: Measure the contour dimension deviation of the secondary bending formed panel, readjust the setting parameters in step S2 and step S3 according to the contour dimension deviation, and repeat steps S2 to S4 until the latest measured contour dimension deviation meets the design requirements, and save the latest setting parameters in step S2 and step S3.

[0020] Since the large thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention adopts the large thin-walled hyperbolic cold screen segment panel forming device of the first embodiment of the present invention for forming, the large thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention has basically the same technical effect as the large thin-walled hyperbolic cold screen segment panel forming device of the first embodiment of the present invention, and will not be repeated here.

[0021] In some embodiments, in step S2, the multiple first rollers in the first rolling assembly maintain the same height, the multiple second rollers in the second rolling assembly maintain the same height, and the multiple third rollers in the third rolling assembly maintain the same height.

[0022] In some embodiments, the posture direction of the once-bent plate when feeding in step S3 is rotated 90 degrees relative to the posture direction of the to-be-formed plate when feeding in step S2.

[0023] In some embodiments, a single large thin-walled hyperbolic cold screen fan segment is divided along the D-shaped annular direction into four curved panels to be formed, namely, the C-segment hyperbolic panel, the single curvature panel, the upper connecting hyperbolic panel located between the top end of the single curvature panel and the top end of the C-segment hyperbolic panel, and the lower connecting hyperbolic panel located between the bottom end of the single curvature panel and the bottom end of the C-segment hyperbolic panel; wherein, the forming method of the single curvature panel omits step S3.

[0024] A third aspect of the present invention provides a cold shield.

[0025] According to the cold shield of the third embodiment of the present invention, the large thin-walled hyperbolic cold shield segment of the cold shield is welded together by a plurality of corresponding curved panels obtained by the large thin-walled hyperbolic cold shield segment panel forming method of the second embodiment of the present invention.

[0026] Since the large thin-walled hyperbolic cold screen segment panel of the cold screen of the third embodiment of the present invention is obtained by adopting the thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention, the cold screen of the third embodiment of the present invention has basically the same technical effect as the large thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention, and will not be repeated here.

[0027] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0029] Figure 1a This is a schematic diagram of a large thin-walled hyperbolic cold shield segment of the present invention, which is divided into curved panels to be formed;

[0030] Figure 1b This is a schematic diagram of another method of dividing the curved panels to be formed into the large thin-walled hyperbolic cold shield segment of the present invention;

[0031] Figure 2 Schematic diagram of a C-segment hyperbolic panel;

[0032] Figure 3 This is a front view of the large thin-walled hyperbolic cold screen segment panel forming device of the present invention during one-time bending forming;

[0033] Figure 4 A side view of the large thin-walled hyperbolic cold screen segment panel forming device of the present invention during one-step bending forming;

[0034] Figure 5 A front view of a single-bent plate obtained by single-bending the large-scale thin-walled hyperbolic cold screen segment panel forming device of the present invention;

[0035] Figure 6 for Figure 5 A side view of a plate formed by a single bending process;

[0036] Figure 7 This is a front view of the large thin-walled hyperbolic cold screen segment panel forming device of the present invention during secondary bending forming;

[0037] Figure 8 A side view of the large thin-walled hyperbolic cold screen segment panel forming device of the present invention during secondary bending forming;

[0038] Figure 9 A front view of a secondary bent plate obtained by secondary bending using the large thin-walled hyperbolic cold screen segment panel forming device of the present invention;

[0039] Figure 10 for Figure 9 Side view of a secondary bending formed panel.

[0040] Reference numerals:

[0041] Large thin-walled hyperbolic cold screen segment panel forming device 1000; first rolling assembly 1; first column 101; first roller 102; second rolling assembly 2; second column 201; second roller 202; third rolling assembly 3; third column 301; third roller 302; first base 4; second base 5; large thin-walled hyperbolic cold screen segment 6; plate to be formed 601; single-bending forming plate 602; secondary-bending forming plate 603; curved panel 604; C-section hyperbolic panel 6041; single-curvature panel 6042; upper connected hyperbolic panel 6043; lower connected hyperbolic panel 6044; first bending direction M; second bending direction N. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0043] The following combination Figures 1a to 10 The following describes a large thin-walled hyperbolic cold shield segment panel forming device 1000, a forming method, and a cold shield according to an embodiment of the present invention.

[0044] like Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, the first aspect of the present invention provides a large-scale thin-walled hyperbolic cold shield segment panel forming device 1000.

[0045] According to the first embodiment of the present invention, a large-scale thin-walled hyperbolic cold shield segment panel forming device 1000 includes a first rolling assembly 1, a second rolling assembly 2 and a third rolling assembly 3.

[0046] Specifically, the first rolling assembly 1 includes a plurality of first columns 101 and a plurality of first rollers 102. The plurality of first columns 101 are arranged linearly and spaced apart along the Y direction, and the plurality of first columns 101 can independently move along the Z direction and the X direction; the plurality of first rollers 102 are rotatably arranged at the upper ends of the plurality of first columns 101 in a one-to-one correspondence, and the rotation axes of the plurality of first rollers 102 extend along the Y direction.

[0047] The second rolling assembly 2 is arranged at intervals from the first rolling assembly 1 in the X direction. The second rolling assembly 2 includes a plurality of second columns 201 and a plurality of second rollers 202. The plurality of second columns 201 are arranged linearly and at intervals along the Y direction. The plurality of second columns 201 can independently move along the Z direction and the X direction. The plurality of second rollers 202 are rotatably arranged at the upper ends of the plurality of second columns 201 in a one-to-one correspondence, and the rotation axes of the plurality of second rollers 202 extend along the Y direction.

[0048] The third rolling assembly 3 is arranged above the first rolling assembly 1 and the second rolling assembly 2. The third rolling assembly 3 includes multiple third columns 301 and multiple third rollers 302. The multiple third columns 301 are arranged in a straight line and spaced apart along the Y direction. The multiple third columns 301 can be independently moved along the Z direction. The multiple third rollers 302 are rotatably arranged at the lower ends of the multiple third columns 301 in a one-to-one correspondence, and the rotation axes of the multiple third rollers 302 extend along the Y direction.

[0049] It should be noted that the multiple first columns 101, the multiple second columns 201, and the multiple third columns 301 can be independently movable in the Z direction (i.e., the up and down direction), and can be driven by existing independent driving devices, such as hydraulic driving devices or electric driving devices. Through the up and down movement of the first columns 101, the second columns 201, and the third columns 301, the height positions of the first rollers 102, the second rollers 202, and the third rollers 302 can be correspondingly adjusted, thereby facilitating control of the Z-direction spacing between the first rollers 102, the second rollers 202, and the third rollers 302; the multiple first columns 101 and the multiple second columns 201 can be independently movable in the X direction, and can be driven by existing independent driving devices, such as hydraulic driving devices or electric driving devices. Through the movement of the multiple first columns 101 and the multiple second columns 201 in the X direction, the X-direction spacing between the first rollers 102 and the second rollers 202 can be conveniently controlled. By adjusting the Z- and X-direction spacing, the panels to be formed (including the panels to be formed 601, the primary bent panels 602, and the secondary bent panels, as described below) can be roll-formed to corresponding curvatures between the plurality of first rollers 102, the plurality of second rollers 202, and the plurality of third rollers 302. The arrangement of the first rollers 102, the second rollers 202, and the third rollers 302 not only allows for continuous feeding of the panels to be formed, eliminating the need for a separate feeding mechanism, but also facilitates roll-forming.

[0050] The large thin-walled hyperbolic cold shield segment panel forming device 1000 of the first embodiment of the present invention forms a curved panel 604 (such as Figures 1a to 2 When forming (as shown), the following steps are included in sequence:

[0051] According to the expanded size of the curved panel 604 to be formed plus the processing allowance for sheet material blanking, to obtain the sheet material to be formed 601 (reference Figure 3 and Figure 4 The sheet to be formed 601).

[0052] One-step bending forming: Figures 2 to 6 As shown, according to the curvature distribution of the first bending direction M of the curved panel 604 to be formed, the rotational speeds of all the first rollers 102, all the second rollers 202 and all the third rollers 302 are pre-set to the same speed, and the Z-direction spacing between the multiple first rollers 102, multiple second rollers 202 and multiple third rollers 302 and the X-direction spacing between the first roller 102 and the second roller 202 during one rolling process are pre-set by a computer program, wherein the first bending direction M is consistent with the D-shaped annular direction of the large thin-walled hyperbolic cold screen segment 6; the plate 601 to be formed is fed along the X direction between the third roller 302 and the first roller 102 and the second roller 202, and the one-time curved surface forming in the first bending direction M is completed by a continuous feeding method to obtain a one-time bent formed plate 602.

[0053] It should be noted that for the molding of the corresponding parts of the curved panel 604 with the same curvature range, the Z-direction spacing and the X-direction spacing remain unchanged. For the molding of the corresponding parts of the curved panel 604 with different curvature ranges, the Z-direction spacing and the X-direction spacing change synchronously.

[0054] Secondary bending forming: Figure 2 、 Figures 7 to 10 As shown, according to the curvature distribution of the second bending direction N of the curved panel 604 to be formed, the Z-direction heights of the multiple first rollers 102, the multiple second rollers 202 and the multiple third rollers 302 along the Y direction are set respectively, wherein the second bending direction N is perpendicular to the first bending direction M; the once-bent panel 602 is fed from the X direction between the third roller 302 and the first roller 102 and the second roller 202, and the secondary curved surface forming in the second bending direction N is completed by a continuous feeding method to obtain the secondary-bent panel 603.

[0055] Contour dimension deviation measurement: Measure the contour dimension deviation of the secondary bending forming panel 603. According to the contour dimension deviation, readjust the setting parameters in the primary bending forming step and the secondary bending forming step, and repeat the primary bending forming step to the contour dimension deviation measurement step until the latest measured contour dimension deviation meets the design requirements. Save the latest setting parameters in the primary bending forming step and the secondary bending forming step for mass production, and mass produce curved panels 604 with high contour dimension accuracy that meet the design requirements.

[0056] like Figure 1a As shown, the two curved panels 604 to be formed, which are divided along the D-shaped annular direction of the large thin-walled hyperbolic cold shield segment 6, can be formed by the large thin-walled hyperbolic cold shield segment panel forming device 1000 of the first aspect of the present invention. Then, the two curved panels 604 are welded together to obtain the large thin-walled hyperbolic cold shield segment 6. Figure 1b As shown, the four curved panels 604 to be formed, which are divided along the D-shaped annular direction of the large thin-walled hyperbolic cold screen fan segment 6, can all be formed using the large thin-walled hyperbolic cold screen fan segment panel forming device 1000 of the first aspect of the embodiment of the present invention, and then the four curved panels 604 are welded to obtain the large thin-walled hyperbolic cold screen fan segment 6.

[0057] Compared with the prior art, the large thin-walled hyperbolic cold screen segment panel forming device 1000 of the first embodiment of the present invention has the following advantages: since the first column 101 and the second column 201 can be independently moved in the Z direction and can be independently moved in the X direction, and the third column 301 can be independently moved in the Z direction, the Z-direction spacing between the plurality of first rollers 102, the plurality of second rollers 202 and the plurality of third rollers 302 and the X-direction spacing between the first roller 102 and the second roller 202 can be adjusted. On the one hand, the large thin-walled hyperbolic cold screen segment panel forming device 1000 of the first embodiment of the present invention has the following advantages: since the first column 101 and the second column 201 can be independently moved in the Z direction and can be independently moved in the X direction, and the third column 301 can be independently moved in the Z direction, the Z-direction spacing between the plurality of first rollers 102, the plurality of second rollers 202 and the plurality of third rollers 302 and the X-direction spacing between the first roller 102 and the second roller 202 can be adjusted. The screen sector panel forming device 1000 can form each curved panel 604 to be formed which is divided along the D-shaped annular direction of the large thin-walled hyperbolic cold screen sector 6. It has good versatility and greatly reduces the manufacturing cost of the large thin-walled hyperbolic cold screen sector panel forming mold, thereby reducing the processing cost of the large thin-walled hyperbolic cold screen sector 6. On the one hand, it can produce curved panels 604 with high contour dimensional accuracy. On the other hand, it can form a smaller number of larger curved panels 604 to be formed which are divided along the D-shaped annular direction of the large thin-walled hyperbolic cold screen sector 6. For example, Figure 1aThe diagram shows that the large thin-walled hyperbolic cooling shield segment 6 is divided into two inner and outer curved panels 604 to be formed along the D-shaped annular direction. One of the curved panels 604 is a C-shaped hyperbolic panel 6041 located outside the top to the bottom of the large thin-walled hyperbolic cooling shield segment 6. The large curved panel 604 (i.e., the C-shaped hyperbolic panel 6041) has five arcs with different curvatures (R1, R2, R3, R4, and R5). The other is a large curved panel 604 located inside the top to the bottom of the large thin-walled hyperbolic cooling shield segment 6 in the I-shaped section. For another example, the large thin-walled hyperbolic cooling shield segment 6 can be divided into 3 to 4 curved panels 604 to be formed along the D-shaped annular direction. Figure 1b Four large curved panels 604 to be formed are shown. In this way, a small number of curved panels 604 are formed and then welded to obtain a large thin-walled hyperbolic cold shield fan segment 6. The number of welding times is reduced, the welding workload is reduced, the production efficiency of the large thin-walled hyperbolic cold shield fan segment is improved, and welding deformation is effectively reduced.

[0058] In some embodiments, as Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, the plurality of first columns 101 and the plurality of second columns 201 are arranged opposite each other in the X direction. The plurality of first columns 101 and the plurality of second columns 201 are arranged opposite each other in the YZ projection plane, and the plurality of first rollers 102 and the plurality of second rollers 202 are arranged opposite each other in the YZ projection plane. This arrangement not only improves the continuous feeding of the panels to be formed without the need for a separate feeding mechanism, but also enhances the roll forming process.

[0059] In some embodiments, as Figure 4 and Figure 8 As shown, the outer circumferences of the plurality of first rollers 102, the plurality of second rollers 202, and the plurality of third rollers 302 have convex arc cross-sections in the Y direction. Thus, the plurality of first rollers 102, the plurality of second rollers 202, and the plurality of third rollers 302 can better contact the surfaces of the sheet material 601 to be formed, the primary bent plate 602, and the secondary bent plate 603 during the primary and secondary bending processes, conforming to the curved cross-sections of the primary and secondary forming processes, thereby better achieving roll-bending.

[0060] In some embodiments, the outer diameters of the plurality of first rollers 102, the outer diameters of the plurality of second rollers 202, and the outer diameters of the plurality of third rollers 302 are the same. This allows for modular production of the first rollers 102, the second rollers 202, and the third rollers 302, thereby reducing the manufacturing cost of the large, thin-walled, hyperbolic cold shield segment panel forming apparatus 1000.

[0061] In some embodiments, the system further includes a first base 4 and a second base 5, which are spaced apart in the Z direction. The first rolling assembly 1, the second rolling assembly 2, and the third rolling assembly 3 are located between the first base 4 and the second base 5. The lower ends of the plurality of first columns 101 and the lower ends of the plurality of second columns 201 are connected to the first base 4, and the upper ends of the plurality of third columns 301 are connected to the second base 5. The provision of the first base 4 facilitates the installation and support of the plurality of first columns 101 and the plurality of second columns 201, and the provision of the second base 5 facilitates the installation and support of the plurality of third columns 301.

[0062] A second aspect of the present invention provides a method for forming a large thin-walled hyperbolic cold shield segment panel.

[0063] like Figures 1a to 10 As shown, according to the second embodiment of the present invention, the large thin-walled hyperbolic cold shield segment panel forming method, the large thin-walled hyperbolic cold shield segment panel is a curved panel 604 to be formed (such as Figures 1a to 2 As shown, the number of curved panels 604 to be formed, which are divided along the D-shaped annular direction by a single large thin-walled hyperbolic cooling shield segment 6, is 2 to 4, including a C-shaped curved panel located on the outside from the top to the bottom of the large thin-walled hyperbolic cooling shield segment 6. The curved panel 604 is formed using the large thin-walled hyperbolic cooling shield segment panel forming device 1000 according to the first embodiment of the present invention, including the following steps:

[0064] S1: blanking; according to the expanded size of the curved panel 604 to be formed plus the processing allowance, the sheet material is blanked to obtain the sheet material 601 to be formed (reference Figure 3 and Figure 4 The sheet to be formed 601).

[0065] S2: One-step bending: Figures 2 to 6 As shown, according to the curvature distribution of the first bending direction M of the curved panel 604 to be formed, for example, Figure 2The curved panel 604 shown in the figure is a C-segment hyperbolic panel 6041. The curved panel 604 (i.e., the C-segment hyperbolic panel 6041) has five variable curvatures (R1, R2, R3, R4, and R5). The rotational speeds of all first rollers 102, all second rollers 202, and all third rollers 302 are preset to the same speed. The Z-direction spacing between the multiple first rollers 102, multiple second rollers 202, and multiple third rollers 302, as well as the X-direction spacing between the first rollers 102 and the second rollers 202 during a single rolling process are preset using a computer program. The first bending direction M is consistent with the D-shaped circumferential direction of the large thin-walled hyperbolic cold shield segment 6. The sheet material 601 to be formed is fed along the X-direction between the third roller 302 and the first roller 102 and the second roller 202. The sheet material is continuously fed to complete the primary curved surface forming in the first bending direction M, thereby obtaining the single-bent sheet material 602. It should be noted that during a single bending process, the multiple first columns 101 and multiple first rollers 102 of the first rolling assembly 1 remain aligned in the Y direction, the multiple second columns 201 and multiple second rollers 202 of the second rolling assembly 2 remain aligned in the Y direction, and the multiple third columns 301 and multiple third rollers 302 of the third rolling assembly 3 remain aligned in the Y direction. For forming portions of the curved panel 604 within the same curvature range, the Z- and X-direction spacing remain unchanged. For forming portions of the curved panel 604 within different curvature ranges, the Z- and X-direction spacings change synchronously.

[0066] S3: Secondary bending forming: Figure 2 、 Figures 7 to 10 As shown, according to the curvature distribution of the second bending direction N of the curved panel 604 to be formed, the Z-direction heights of the multiple first rollers 102, the multiple second rollers 202 and the multiple third rollers 302 along the Y direction are set respectively, wherein the second bending direction N is perpendicular to the first bending direction M; the once-bent panel 602 is fed from the X direction between the third roller 302 and the first roller 102 and the second roller 202, and the secondary curved surface forming in the second bending direction N is completed by a continuous feeding method to obtain the secondary-bent panel 603.

[0067] It should be noted that, during the secondary bending forming process, the multiple first columns 101 and the multiple first rollers 102 of the first rolling assembly 1 remain arranged in a straight line in the Y direction, the multiple second columns 201 and the multiple second rollers 202 of the second rolling assembly 2 remain arranged in a straight line in the Y direction, and the multiple third columns 301 and the multiple third rollers 302 of the third rolling assembly 3 remain arranged in a straight line in the Y direction.

[0068] S4: Measurement of profile size deviation: Measure the profile size deviation of the secondary bent formed panel 603, readjust the setting parameters in step S2 and step S3 according to the profile size deviation, and repeat steps S2 to S4 until the latest measured profile size deviation meets the design requirements, and save the latest setting parameters in step S2 and step S3 for mass production, so as to mass produce curved panels 604 with high profile size accuracy that meet the design requirements.

[0069] Since the large thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention adopts the large thin-walled hyperbolic cold screen segment panel forming device of the first embodiment of the present invention for forming, the large thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention has basically the same technical effect as the large thin-walled hyperbolic cold screen segment panel forming device of the first embodiment of the present invention, and will not be repeated here.

[0070] In some embodiments, as Figure 3 and Figure 4 As shown, in step S2, the multiple first rollers 102 in the first rolling assembly 1 are maintained at the same height, the multiple second rollers 202 in the second rolling assembly 2 are maintained at the same height, and the multiple third rollers 302 in the third rolling assembly 3 are maintained at the same height. This facilitates the completion of a single curved surface forming process in the first bending direction M, thereby obtaining a single-bent plate 602.

[0071] In some embodiments, the orientation of the plate 602 to be bent once in step S3 is rotated 90 degrees relative to the orientation of the plate 601 to be formed in step S2. This facilitates forming a secondary curved surface in the second bending direction N and obtaining a secondary bent plate.

[0072] In some embodiments, as Figure 1b As shown, a single large thin-walled hyperbolic cold screen fan segment 6 is divided along the D-shaped annular direction into four curved panels 604 to be formed, namely the above-mentioned C-segment hyperbolic panel 6041, the single curvature panel 6042, the upper connecting hyperbolic panel 6043 located between the top of the single curvature panel 6042 and the top of the C-segment hyperbolic panel 6041, and the lower connecting hyperbolic panel 6044 located between the bottom end of the single curvature panel 6042 and the bottom end of the C-segment hyperbolic panel 6041; wherein, the forming method of the single curvature panel 6042 omits step S3.

[0073] In the prior art, the C-shaped section located from the top to the bottom outer side of the large thin-walled hyperbolic cold shield segment 6 is usually subdivided into about five curved panels, which increases the number of welding times and the welding workload, resulting in low production efficiency of the large thin-walled hyperbolic cold shield segment and difficulty in controlling welding deformation. In this embodiment, the C-shaped section located from the top to the bottom outer side of the large thin-walled hyperbolic cold shield segment 6 is formed as a large curved panel 604 (i.e., the C-shaped section hyperbolic panel 6041), which can reduce the number of curved panels 604 of the single large thin-walled hyperbolic cold shield segment 6 to be assembled after forming. The number of welding times is increased. At the same time, the inner I-type section from the top to the bottom of the large thin-walled hyperbolic cold screen fan segment 6 is further divided into three panels: a single curvature panel 6042, an upper connected hyperbolic panel 6043, and a lower connected hyperbolic panel 6044. The forming method of the single curvature panel 6042 omits step S3. As a result, the curved panels to be formed divided along the D-shaped annular direction of a single large thin-walled hyperbolic cold screen fan segment 6 are convenient to form, which reduces the welding workload of the curved panels of a single large thin-walled hyperbolic cold screen fan segment. The production efficiency of the large thin-walled hyperbolic cold screen fan segment 6 is high, and the welding deformation can be effectively controlled.

[0074] A third aspect of the present invention provides a cold shield.

[0075] According to the cold shield of the third embodiment of the present invention, the large thin-walled hyperbolic cold shield segment 6 of the cold shield is welded together by a plurality of corresponding curved panels 604 obtained by the large thin-walled hyperbolic cold shield segment panel forming method of the second embodiment of the present invention.

[0076] Since the large thin-walled hyperbolic cold screen segment panel of the cold screen of the third embodiment of the present invention is obtained by adopting the thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention, the cold screen of the third embodiment of the present invention has basically the same technical effect as the large thin-walled hyperbolic cold screen segment panel forming method of the second embodiment of the present invention, and will not be repeated here.

[0077] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that the specific features, structures, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0078] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A method for forming a large thin-walled hyperbolic cold shield segment panel, characterized in that: The large thin-walled hyperbolic cold shield segment panel is a curved panel to be formed by dividing the large thin-walled hyperbolic cold shield segment along the D-shaped annular direction. The curved panel is formed by a large thin-walled hyperbolic cold shield segment panel forming device. The large thin-walled hyperbolic cold shield segment panel forming device includes: a first rolling assembly, the first rolling assembly comprising a plurality of first rollers linearly arranged and spaced apart along the Y direction, the plurality of first rollers being independently movable along the Z direction and the X direction; the rotation axes of the plurality of first rollers extending along the Y direction; a second rolling assembly, the second rolling assembly being spaced apart from the first rolling assembly in the X direction, the second rolling assembly comprising a plurality of second rollers arranged linearly and spaced apart in the Y direction, the plurality of second rollers being independently movable in the Z direction and the X direction; the rotation axes of the plurality of second rollers extending in the Y direction; a third rolling assembly, the third rolling assembly being arranged above and between the first rolling assembly and the second rolling assembly, the third rolling assembly comprising a plurality of third rollers linearly arranged and spaced apart along the Y direction, the rotation axes of the plurality of third rollers extending along the Y direction; The method for forming a large thin-walled hyperbolic cold shield segment panel comprises the following steps: S1: blanking; blanking the plate according to the unfolded size of the curved plate to be formed plus the processing allowance to obtain the plate to be formed; S2: One-time bending forming: according to the curvature distribution of the first bending direction of the curved panel to be formed, the rotational speeds of all the first rollers, all the second rollers and all the third rollers are pre-set to the same speed, and the Z-direction spacing between the plurality of the first rollers, the plurality of the second rollers and the plurality of the third rollers and the X-direction spacing between the first roller and the second roller in the one-time rolling process are pre-set by a computer program, wherein the first bending direction is consistent with the D-shaped annular direction of the large thin-walled hyperbolic cold shield segment; the sheet to be formed is fed along the X direction between the third roller and the first roller and the second roller, and the one-time curved surface forming in the first bending direction is completed by a continuous feeding method to obtain a one-time bent sheet; S3: secondary bending forming: according to the curvature distribution of the second bending direction of the curved panel to be formed, the Z-direction heights of the plurality of first rollers, the plurality of second rollers, and the plurality of third rollers along the Y direction are respectively set, wherein the second bending direction is perpendicular to the first bending direction; the single-bent plate is fed from the X direction into between the third roller, the first roller, and the second roller, and the posture direction of the single-bent plate during feeding is rotated 90 degrees relative to the posture direction of the plate to be formed during feeding in step S2, and the secondary curved surface forming in the second bending direction is completed by continuous feeding to obtain a secondary bent plate; S4: Contour dimension deviation measurement: Measure the contour dimension deviation of the secondary bending formed panel, readjust the setting parameters in step S2 and step S3 according to the contour dimension deviation, and repeat steps S2 to S4 until the latest measured contour dimension deviation meets the design requirements, and save the latest setting parameters in step S2 and step S3.

2. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 1 is characterized in that: In step S2, the first rollers in the first rolling assembly are kept at the same height, the second rollers in the second rolling assembly are kept at the same height, and the third rollers in the third rolling assembly are kept at the same height.

3. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 1 is characterized in that: The number of the curved panels to be formed along the D-shaped annular division of a single large thin-walled hyperbolic cooling screen segment is 2 to 4, including a C-shaped hyperbolic panel located on the outside from the top to the bottom of the large thin-walled hyperbolic cooling screen segment.

4. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 3 is characterized in that: There are four curved panels to be formed along the D-shaped annular division of a single large thin-walled hyperbolic cold screen fan segment, namely the C-shaped segment hyperbolic panel, the single curvature panel, the upper connecting hyperbolic panel located between the top end of the single curvature panel and the top end of the C-shaped segment hyperbolic panel, and the lower connecting hyperbolic panel located between the bottom end of the single curvature panel and the bottom end of the C-shaped segment hyperbolic panel; wherein, the forming method of the single curvature panel omits step S3.

5. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 1 is characterized in that: The first rolling assembly further includes a plurality of first columns linearly arranged at intervals along the Y direction, wherein the plurality of first columns are independently movable along the Z direction and the X direction; and a plurality of first rollers are rotatably disposed on the upper ends of the plurality of first columns in a one-to-one correspondence. The second rolling assembly further includes a plurality of second columns linearly arranged at intervals along the Y direction, wherein the plurality of second columns are independently movable along the Z direction and the X direction; and a plurality of second rollers are rotatably disposed on the upper ends of the plurality of second columns in a one-to-one correspondence. The third rolling assembly further comprises a plurality of third columns linearly spaced apart along the Y direction, wherein the plurality of third columns are independently movable along the Z direction, and the plurality of third rollers are rotatably arranged at the lower ends of the plurality of third columns in a one-to-one correspondence.

6. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 5 is characterized in that: The plurality of first columns and the plurality of second columns are arranged one by one opposite to each other in the X direction, the plurality of first columns and the plurality of second columns are arranged one by one opposite to each other on the YZ projection plane, and the plurality of first rollers and the plurality of second rollers are arranged one by one opposite to each other on the YZ projection plane.

7. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 1 is characterized in that: The cross-section of the outer peripheral surfaces of the plurality of first rollers, the plurality of second rollers and the plurality of third rollers in the Y direction is convex arc-shaped.

8. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 1 is characterized in that: The outer diameters of the plurality of first rollers are the same, the outer diameters of the plurality of second rollers are the same, and the outer diameters of the plurality of third rollers are the same.

9. The method for forming a large thin-walled hyperbolic cold shield segment panel according to claim 5, characterized in that: It also includes a first base and a second base, and the first base and the second base are arranged with an upper and lower interval in the Z direction; the first rolling assembly, the second rolling assembly and the third rolling assembly are located between the first base and the second base, the lower ends of the plurality of first columns and the lower ends of the plurality of second columns are connected to the first base, and the upper ends of the plurality of third columns are connected to the second base.

10. A cold screen, characterized in that: The large thin-walled hyperbolic cold screen segment of the cold screen is formed by welding together a plurality of corresponding curved panels obtained by the large thin-walled hyperbolic cold screen segment panel forming method according to any one of claims 1 to 9.

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