Large thin-wall double-curved-surface cold shield sector panel forming device and forming method and cold shield

Abstract

The invention discloses a large thin-wall double-curved-surface cold shield sector panel forming device and method and a cold shield, and belongs to the technical field of nuclear fusion devices. In the forming device, a second rolling assembly and a first rolling assembly are arranged in the X direction in a spaced mode, and a third rolling assembly is arranged above the position between the first rolling assembly and the second rolling assembly. The multiple first stand columns, the multiple second stand columns and the multiple third stand columns are linearly arranged in the Y direction, the multiple first stand columns and the multiple second stand columns can independently move in the Z direction and the X direction, and the multiple third stand columns can independently move in the Z direction; the plurality of first rollers, the plurality of second rollers and the plurality of third rollers are correspondingly arranged at the upper ends of the plurality of first upright posts, the upper ends of the plurality of second upright posts and the lower ends of the plurality of third upright posts. The forming device is good in universality and low in cost, the forming precision of the curved plate can be improved, the production efficiency of the large thin-wall double-curved-surface cold screen sector can be improved, and welding large thin-wall deformation can be effectively reduced.

Description

Technical Field

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

[0002] In order to promote the research on the utilization of controllable nuclear fusion energy, in the construction of a new type of compact fusion energy experimental device, a new type of large-size compact vacuum chamber cold shield structure is designed. The vacuum chamber cold shield is located in a narrow gap outside the vacuum chamber and inside the toroidal field coil magnet, and completely wraps the vacuum chamber, isolating the vacuum chamber from the magnet components. The vacuum chamber cold shield as a whole has a thin-walled rotating body structure, and is divided into multiple sectors along the circumferential direction of rotation. The rotating cross-section is a D-shaped closed curve with multiple different curvatures. The size of the vacuum chamber cold shield sector is large, the distance from its top to bottom is greater than or equal to 6 meters, and the maximum distance from its inner side to the outer side is greater than or equal to 4 meters.

[0003] The characteristics of the vacuum chamber cold shield sector panel are high strength, large springback and high requirement for surface accuracy. The existing problems are as follows: due to the large size of the vacuum chamber cold shield sector, the vacuum chamber cold shield sector is generally divided into more (generally not less than eight segments) curved panels (i.e., cold shield sector panels) along the D-shaped circumferential direction, and multiple sets of pressing molds are respectively customized according to the curvature and surface size of each curved panel. Because the pressing surfaces of the upper die and the lower die of the pressing mold are both of fixed shapes and do not have universality, the cost of the curved panel pressing molds required for the processing of the existing cold shield sectors is very high; in addition, after the multiple curved panels are formed respectively, they need to be butt-welded to obtain a large thin-walled hyperbolic cold shield sector, resulting in a large number of welding times and a large amount of welding work, low production efficiency of the large thin-walled hyperbolic cold shield sector, and great difficulty in controlling the welding deformation of the large thin-walled hyperbolic cold shield sector panel. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, an object of a first aspect of the present invention is to provide a forming device for a large thin-walled hyperbolic cold shield sector panel, which has good universality, low cost, can improve the forming accuracy of the curved panel, can improve the production efficiency of the large thin-walled hyperbolic cold shield sector and can effectively reduce the welding deformation.

[0005] According to an embodiment of the present invention, the forming device for a large thin-walled hyperbolic cold shield sector panel includes: A first rolling assembly, the first rolling assembly includes a plurality of first columns and a plurality of first rollers. The plurality of first columns are arranged at intervals in a straight line along the Y direction, and the plurality of first columns are respectively independently movable along the Z direction and the X direction; the plurality of first rollers are rotatably arranged at the upper ends of the plurality of first columns in one-to-one correspondence, and the rotation axes of the plurality of first rollers extend along the Y direction; The second rolling assembly, the second rolling assembly is arranged at an interval with the first rolling assembly in the X direction, the second rolling assembly includes a plurality of second columns and a plurality of second rollers, the plurality of second columns are linearly arranged at intervals along the Y direction, and the plurality of second columns can be independently moved along the Z direction and the X direction respectively; the plurality of second rollers are rotatably arranged at the upper ends of the plurality of second columns in one-to-one correspondence, and the rotation axes of the plurality of second rollers extend along the Y direction; The third rolling assembly, the third rolling assembly is arranged above between the first rolling assembly and the second rolling assembly, the third rolling assembly includes a plurality of third columns and a plurality of third rollers, the plurality of third columns are linearly arranged at intervals along the Y direction, the plurality of third columns can be independently moved along the Z direction respectively, the plurality of third rollers are rotatably arranged at the lower ends of the plurality of third columns in one-to-one correspondence, and the rotation axes of the plurality of second rollers extend along the Y direction.

[0006] Compared with the prior art, the large thin-walled hyperbolic cold screen segment panel forming device of the first aspect embodiment of the present invention has the following advantages: Since the first column and the second column can both 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, therefore, 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 rollers and the second rollers can be adjusted. On the one hand, the large thin-walled hyperbolic cold screen segment panel forming device of the first aspect embodiment of the present invention can form each of the curved panels to be formed divided along the D-shaped circumferential direction of the large thin-walled hyperbolic cold screen segment, with good versatility, greatly reducing the manufacturing cost of the large thin-walled hyperbolic cold screen segment panel forming die, thereby reducing the processing cost of the large thin-walled hyperbolic cold screen segment; on the other hand, the curved panel with high contour dimension accuracy can be produced; on the third hand, the curved panels to be formed with a smaller number and larger size divided along the D-shaped circumferential direction of the large thin-walled hyperbolic cold screen segment can be formed. In this way, after the smaller number of curved panels are formed and welded together to obtain the large thin-walled hyperbolic cold screen segment, the number of welding times is small, the welding workload is reduced, the production efficiency of the large thin-walled hyperbolic cold screen segment is improved, and the welding deformation is effectively reduced.

[0007] In some embodiments, the plurality of first columns and the plurality of second columns are arranged in a one-to-one facing arrangement in the X direction, the plurality of first columns and the plurality of second columns are arranged in a one-to-one vertical facing arrangement with the plurality of third columns in the YZ projection plane, and the plurality of first rollers and the plurality of second rollers are arranged in a one-to-one vertical facing arrangement with the plurality of third rollers in the YZ projection plane.

[0008] In some embodiments, 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.

[0009] In some embodiments, the outer diameter sizes of the plurality of first rollers are the same, the outer diameter sizes of the plurality of second rollers are the same, and the outer diameter sizes of the plurality of third rollers are the same.

[0010] In some embodiments, it further includes a first base and a second base, the first base and the second base are arranged at intervals 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.

[0011] The second aspect of the present invention proposes a method for forming a large thin-walled hyperbolic cold screen fan segment panel.

[0012] According to the method for forming a large thin-walled hyperbolic cold screen fan segment panel according to the embodiments of the second aspect of the present invention, the large thin-walled hyperbolic cold screen fan segment panel is a curved panel to be formed by dividing the large thin-walled hyperbolic cold screen fan segment along the D-shaped circumferential direction. The number of curved panels to be formed by dividing a single large thin-walled hyperbolic cold screen fan segment along the D-shaped circumferential direction is 2 to 4, including a C-shaped segment hyperbolic panel located on the outer side from the top to the bottom of the large thin-walled hyperbolic cold screen fan segment; the curved panel is formed by using the large thin-walled hyperbolic cold screen fan segment panel forming device according to the embodiments of the first aspect of the invention, and the method includes the following steps: S1: Blanking; According to the developed size of the curved panel to be formed plus the machining allowance, perform sheet metal blanking to obtain the sheet to be formed. S2: Primary bending forming: According to the curvature distribution of the first bending direction of the curved panel to be formed, preset the same rotation speed for all the first rollers, all the second rollers, and all the third rollers, and preset 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 during the primary plate rolling process through a computer program, wherein the first bending direction is consistent with the D-shaped circumferential direction of the large thin-walled hyperbolic cold screen fan segment; Feed the sheet to be formed into the space between the third roller, the first roller, and the second roller along the X direction, and complete the primary surface forming in the first bending direction by continuous feeding to obtain a primary bending formed plate. S3: Secondary bending forming: According to the curvature distribution in the second bending direction of the curved panel to be formed, respectively set the Z-direction heights of the multiple first rollers, multiple second rollers, and multiple third rollers along the Y direction, where the second bending direction is perpendicular to the first bending direction; Feed the once-bent formed panel from the X direction between the third roller and the first roller and the second roller, and complete the secondary surface forming in the second bending direction through a continuous feeding method to obtain a secondary-bent formed panel. S4: Profile dimension deviation measurement: Measure the profile dimension deviation of the secondary-bent formed panel. According to the profile dimension deviation, readjust the set parameters in steps S2 and S3, and repeat steps S2 to S4 until the latest measured profile dimension deviation meets the design requirements, and save the latest set parameters in steps S2 and S3.

[0013] Since the forming method of the large thin-walled hyperbolic cold shield fan segment panel in the second aspect embodiment of the present invention uses the forming device of the large thin-walled hyperbolic cold shield fan segment panel in the first aspect embodiment of the present invention for forming, therefore, the forming method of the large thin-walled hyperbolic cold shield fan segment panel in the second aspect embodiment of the present invention has basically the same technical effects as the forming device of the large thin-walled hyperbolic cold shield fan segment panel in the first aspect embodiment of the present invention, which will not be elaborated here.

[0014] 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.

[0015] In some embodiments, the pose direction of the once-bent formed panel during feeding in step S3 is rotated 90 degrees relative to the pose direction of the to-be-formed sheet material during feeding in step S2.

[0016] In some embodiments, there are four curved panels to be formed by dividing a single large thin-walled hyperbolic cold shield fan segment along the D-shaped circumferential direction, which are the C-shaped segment hyperbolic panel, the single-curvature panel, the upper connecting hyperbolic panel located between the top of the single-curvature panel and the top of the C-shaped segment hyperbolic panel, and the lower connecting hyperbolic panel located between the bottom of the single-curvature panel and the bottom of the C-shaped segment hyperbolic panel; among them, the forming method of the single-curvature panel omits step S3.

[0017] The third aspect of the present invention proposes a cold shield.

[0018] According to the cold screen of the third aspect embodiment of the present invention, the large thin-walled hyperbolic cold screen fan segment of the cold screen is formed by welding a plurality of corresponding curved panels obtained by the forming method of the large thin-walled hyperbolic cold screen fan segment panel of the second aspect embodiment of the present invention.

[0019] Since the large thin-walled hyperbolic cold screen fan segment panel of the cold screen of the third aspect embodiment of the present invention is obtained by using the forming method of the large thin-walled hyperbolic cold screen fan segment panel of the second aspect embodiment of the present invention, therefore, the cold screen of the third aspect embodiment of the present invention has basically the same technical effects as the forming method of the large thin-walled hyperbolic cold screen fan segment panel of the second aspect embodiment of the present invention, which will not be elaborated here.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1a is a schematic diagram of a curved panel to be formed divided from a large thin-walled hyperbolic cold screen fan segment of the present invention; Figure 1b is another schematic diagram of a curved panel to be formed divided from a large thin-walled hyperbolic cold screen fan segment of the present invention; Figure 2 is a schematic diagram of a C-shaped segment hyperbolic panel; Figure 3 is a front view of the forming device for the large thin-walled hyperbolic cold screen fan segment panel of the present invention during the first bending forming; Figure 4 is a side view of the forming device for the large thin-walled hyperbolic cold screen fan segment panel of the present invention during the first bending forming; Figure 5 is a front view of the first bending formed plate obtained by performing the first bending forming using the forming device for the large thin-walled hyperbolic cold screen fan segment panel of the present invention; Figure 6 is Figure 5 a side view of the first bending formed plate; Figure 7 is a front view of the forming device for the large thin-walled hyperbolic cold screen fan segment panel of the present invention during the second bending forming; Figure 8 is a side view of the forming device for the large thin-walled hyperbolic cold screen fan segment panel of the present invention during the second bending forming; Figure 9The front view of the secondary bending formed plate obtained by using the large thin-walled hyperbolic cold screen fan segment panel forming device of the present invention for secondary bending forming; Figure 10 is Figure 9 the side view of the secondary bending formed plate.

[0022] Reference numerals: Large thin-walled hyperbolic cold screen fan 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 fan segment 6; Plate to be formed 601; Primary bending formed plate 602; Secondary bending formed plate 603; Curved panel 604; C-shaped segment hyperbolic panel 6041; Single-curvature panel 6042; Upper connecting hyperbolic panel 6043; Lower connecting hyperbolic panel 6044; First bending direction M; Second bending direction N. Detailed implementation manners

[0023] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0024] The following Figures 1a to 10 will be used to describe the large thin-walled hyperbolic cold screen fan segment panel forming device 1000, forming method and cold screen of the embodiments of the present invention.

[0025] As Figure 3 , Figure 4 , Figure 7 and Figure 8 shown, a large thin-walled hyperbolic cold screen fan segment panel forming device 1000 is proposed in the first aspect of the present invention.

[0026] The large thin-walled hyperbolic cold screen fan segment panel forming device 1000 according to the embodiments of the first aspect of the present invention includes a first rolling assembly 1, a second rolling assembly 2 and a third rolling assembly 3.

[0027] 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 at intervals in a straight line along the Y direction, and the plurality of first columns 101 can be independently moved along the Z direction and the X direction respectively; 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.

[0028] The second rolling assembly 2 is arranged at an interval 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 linearly arranged at intervals in the Y direction, and the plurality of second columns 201 can move independently in the Z direction and the X direction respectively; 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 in the Y direction.

[0029] 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 a plurality of third columns 301 and a plurality of third rollers 302. The plurality of third columns 301 are linearly arranged at intervals in the Y direction, the plurality of third columns 301 can move independently in the Z direction respectively, and the plurality of third rollers 302 are rotatably arranged at the lower ends of the plurality of third columns 301 in a one-to-one correspondence, and the rotation axes of the plurality of second rollers 202 extend in the Y direction.

[0030] It should be noted that the plurality of first columns 101, the plurality of second columns 201, and the plurality of third columns 301 can move independently in the Z direction (i.e., the up and down direction), and can be driven respectively by existing independent driving devices, such as hydraulic driving devices or electric driving devices, etc. By moving the first column 101, the second column 201, and the third column 301 up and down, the height positions of the first roller 102, the second roller 202, and the third roller 302 can be correspondingly adjusted, which is convenient for controlling the Z-direction spacing between the first roller 102, the second roller 202, and the third roller 302; the plurality of first columns 101 and the plurality of second columns 201 can move independently in the X direction, and can be driven respectively by existing independent driving devices such as hydraulic driving devices or electric driving devices, etc. By moving the plurality of first columns 101 and the plurality of second columns 201 in the X direction, it is convenient to control the X-direction spacing between the first roller 102 and the second roller 202. By adjusting the Z-direction spacing and the X-direction spacing, the to-be-formed plate (including the to-be-formed plate 601, the once-bent forming plate 602, and the twice-bent forming plate mentioned below) can be rolled into a corresponding curvature shape 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 roller 102, the second roller 202, and the third roller 302 can, on the one hand, drive the to-be-formed plate to continuously feed, without the need for an additional feeding mechanism; on the other hand, it is convenient for rolling and forming.

[0031] When the large-thin-wall hyperbolic cold screen fan section panel forming device 1000 according to the first aspect embodiment of the present invention forms the to-be-formed curved panel 604 (as Figures 1a to 2 shown) divided from the large-thin-wall hyperbolic cold screen fan section 6 along the D-shaped circumferential direction, the following steps are sequentially included: Blanking: According to the developed size of the curved panel 604 to be formed plus the machining allowance, the sheet material is blanked to obtain the sheet material 601 to be formed (refer to the sheet material 601 in Figure 3 and Figure 4 ).

[0032] First bending forming: As shown in Figures 2 to 6 , according to the curvature distribution of the first bending direction M of the curved panel 604 to be formed, the rotation speeds of all the first rollers 102, all the second rollers 202 and all the third rollers 302 are preset to be the same speed, and the Z-direction spacing between the multiple first rollers 102, the multiple second rollers 202 and the multiple third rollers 302 and the X-direction spacing between the first roller 102 and the second roller 202 during the first plate rolling process are preset through a computer program. Among them, 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 into the space between the third roller 302, the first roller 102 and the second roller 202 along the X direction, and through continuous feeding, the first surface forming in the first bending direction M is completed to obtain the first bending formed plate part 602.

[0033] It should be noted that for the forming of the corresponding parts in the same curvature range of the curved panel 604, the Z-direction spacing and the X-direction spacing remain unchanged, and for the forming of the corresponding parts in different curvature ranges of the curved panel 604, the Z-direction spacing and the X-direction spacing change synchronously.

[0034] Second bending forming: As shown in Figure 2 , Figures 7 to 10 , 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 respectively set. Among them, the second bending direction N is perpendicular to the first bending direction M; the first bending formed plate part 602 is fed into the space between the third roller 302, the first roller 102 and the second roller 202 along the X direction, and through continuous feeding, the second surface forming in the second bending direction N is completed to obtain the second bending formed plate part 603.

[0035] Profile size deviation measurement: Measure the profile size deviation of the second bending formed plate part 603. According to the profile size deviation, readjust the set parameters in the first bending forming step and the second bending forming step, and repeat the first bending forming step to the profile size deviation measurement step until the latest measured profile size deviation meets the design requirements, and save the latest set parameters in the first bending forming step and the second bending forming step for mass production, and mass produce the curved panel 604 that meets the design requirements with high profile size accuracy.

[0036] As shown in Figure 1aAs shown, both of the two to-be-formed curved panels 604 divided from the large thin-walled hyperbolic cold shield segment 6 along the D-shaped circumferential direction can be formed by using the large thin-walled hyperbolic cold shield segment panel forming device 1000 of the first aspect embodiment of the present invention. Then, the two curved panels 604 are butt-welded to obtain the large thin-walled hyperbolic cold shield segment 6. As Figure 1b As shown, all of the four to-be-formed curved panels 604 divided from the large thin-walled hyperbolic cold shield segment 6 along the D-shaped circumferential direction can be formed by using the large thin-walled hyperbolic cold shield segment panel forming device 1000 of the first aspect embodiment of the present invention. Then, the four curved panels 604 are butt-welded to obtain the large thin-walled hyperbolic cold shield segment 6.

[0037] Compared with the prior art, the large thin-walled hyperbolic cold shield segment panel forming device 1000 of the first aspect embodiment of the present invention has the following advantages: Since both the first column 101 and the second column 201 can move independently in the Z direction and can move independently in the X direction, and the third column 301 can move independently in the Z direction, therefore, the Z-direction spacing between the multiple first rollers 102, the multiple second rollers 202 and the multiple third rollers 302 and the X-direction spacing between the first rollers 102 and the second rollers 202 can be adjusted. On the one hand, the large thin-walled hyperbolic cold shield segment panel forming device 1000 of the first aspect embodiment of the present invention can form each of the to-be-formed curved panels 604 divided from the large thin-walled hyperbolic cold shield segment 6 along the D-shaped circumferential direction, with good versatility, greatly reducing the manufacturing cost of the large thin-walled hyperbolic cold shield segment panel forming die, thereby reducing the processing cost of the large thin-walled hyperbolic cold shield segment 6; on the other hand, curved panels 604 with high contour dimension accuracy can be produced; on the third hand, it can form a smaller number of to-be-formed curved panels 604 with larger sizes divided from the large thin-walled hyperbolic cold shield segment 6 along the D-shaped circumferential direction. For example, Figure 1a It shows that two to-be-formed curved panels 604, i.e., the inner and outer ones, are divided from the large thin-walled hyperbolic cold shield segment 6 along the D-shaped circumferential direction. One of the curved panels 604 is a C-shaped segment hyperbolic panel 6041 from the top to the bottom outside of the large thin-walled hyperbolic cold shield segment 6. This large curved panel 604 (i.e., the C-shaped segment hyperbolic panel 6041) has five arc degrees with different curvatures (R1, R2, R3, R4, R5). The other one is a large curved panel 604 of the I-shaped segment from the top to the bottom inside of the large thin-walled hyperbolic cold shield segment 6. Another example is that it can form 3 to 4 to-be-formed curved panels 604 divided from the large thin-walled hyperbolic cold shield segment 6 along the D-shaped circumferential direction. Figure 1bFour large curved panels 604 to be formed are shown. In this way, after a smaller number of curved panels 604 are formed, they are butt-welded to obtain the large thin-walled hyperbolic cold screen segment 6. The number of welding operations is small, the welding workload is reduced, the production efficiency of the large thin-walled hyperbolic cold screen segment is improved, and the welding deformation is effectively reduced.

[0038] In some embodiments, as Figure 3 , Figure 4 , Figure 7 and Figure 8 shown, a plurality of first columns 101 and a plurality of second columns 201 are arranged in a one-to-one facing manner in the X direction. The plurality of first columns 101 and the plurality of second columns 201 are arranged in a one-to-one facing manner vertically in the YZ projection plane with a plurality of third columns 301 in the YZ projection plane. A plurality of first rollers 102 and a plurality of second rollers 202 are arranged in a one-to-one facing manner vertically in the YZ projection plane with a plurality of third rollers 302 in the YZ projection plane. In this way, on the one hand, it can better drive the plate to be formed to continuously feed, and no additional feeding mechanism is required; on the other hand, it can better roll and form.

[0039] In some embodiments, as Figure 4 and Figure 8 shown, the outer circumferential surfaces of the plurality of first rollers 102, the plurality of second rollers 202, and the plurality of third rollers 302 are convex arcs in the cross-section in the Y direction. In this way, 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 plate to be formed 601, the primary bending formed plate 602, and the secondary bending formed plate 603 during the primary bending forming and secondary bending forming processes, can match the cross-section of the primary formed curved surface, and can match the cross-section of the secondary formed curved surface, and can better realize roll bending forming.

[0040] In some embodiments, the outer diameter sizes of the plurality of first rollers 102 are the same, the outer diameter sizes of the plurality of second rollers 202 are the same, and the outer diameter sizes of the plurality of third rollers 302 are the same. In this way, the first rollers 102, the second rollers 202, and the third rollers 302 can be modularly produced respectively, reducing the manufacturing cost of the large thin-walled hyperbolic cold screen segment panel forming device 1000.

[0041] In some embodiments, it further includes a first base 4 and a second base 5, which are arranged at an interval 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 sides 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. By providing the first base 4, it is convenient to install and support the plurality of first columns 101 and the plurality of second columns 201. By providing the second base 5, it is convenient to install and support the plurality of third columns 301.

[0042] The second aspect of the present invention proposes a method for forming a large thin-walled hyperbolic cold shield fan segment panel.

[0043] As Figures 1a to 10 shown, according to the method for forming a large thin-walled hyperbolic cold shield fan segment panel in the second aspect embodiment of the present invention, the large thin-walled hyperbolic cold shield fan segment panel is a curved panel 604 to be formed divided from the large thin-walled hyperbolic cold shield fan segment 6 along the D-shaped circumferential direction (as Figures 1a to 2 shown). The number of curved panels 604 to be formed divided from a single large thin-walled hyperbolic cold shield fan segment 6 along the D-shaped circumferential direction is 2 to 4, including a C-shaped segment curved panel located on the outer side from the top to the bottom of the large thin-walled hyperbolic cold shield fan segment 6. The curved panel 604 is formed by using the large thin-walled hyperbolic cold shield fan segment panel forming device 1000 of the first aspect embodiment of the present invention, and the method includes the following steps: S1: Blanking; The sheet material is blanked according to the unfolded size of the curved panel 604 to be formed plus the processing allowance to obtain the sheet material 601 to be formed (refer to the sheet material 601 in Figure 3 and Figure 4 ).

[0044] S2: Primary bending forming: As Figures 2 to 6 shown, according to the curvature distribution of the first bending direction M of the curved panel 604 to be formed. For example, Figure 2A curved panel 604 shown in the figure is a C-shaped section hyperbolic panel 6041. The curved panel 604 (i.e., the C-shaped section hyperbolic panel 6041) has five changing curvatures (R1, R2, R3, R4, R5). The rotational speeds of all the first rollers 102, all the second rollers 202, and all the third rollers 302 are preset to be the same speed in advance, and the Z-direction spacing between 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 a single plate rolling process are preset through a computer program. Among them, the first bending direction M is consistent with the D-shaped circumferential direction of the large thin-walled hyperbolic cold shield segment 6. The to-be-formed sheet 601 is fed into the space between the third roller 302, the first roller 102, and the second roller 202 along the X direction, and through a continuous feeding method, a single curved surface forming in the first bending direction M is completed to obtain a once-bent forming plate member 602. It should be noted that during the once-bent forming process, multiple first columns 101 and multiple first rollers 102 of the first rolling assembly 1 are linearly arranged in the Y direction, multiple second columns 201 and multiple second rollers 202 of the second rolling assembly 2 are linearly arranged in the Y direction, and multiple third columns 301 and multiple third rollers 302 of the third rolling assembly 3 are linearly arranged in the Y direction. For the forming of the corresponding parts in the same curvature range of the curved panel 604, the Z-direction spacing and the X-direction spacing remain unchanged. For the forming of the corresponding parts in different curvature ranges of the curved panel 604, the Z-direction spacing and the X-direction spacing change synchronously.

[0045] S3: Secondary bending forming: As Figure 2 , Figures 7 to 10 shown, according to the curvature distribution of the second bending direction N of the to-be-formed curved panel 604, the Z-direction heights of multiple first rollers 102, multiple second rollers 202, and multiple third rollers 302 along the Y direction are respectively set. Among them, the second bending direction N is perpendicular to the first bending direction M. The once-bent forming plate member 602 is fed into the space between the third roller 302, the first roller 102, and the second roller 202 along the X direction, and through a continuous feeding method, a secondary curved surface forming in the second bending direction N is completed to obtain a secondary-bent forming plate member 603.

[0046] It should be noted that during the secondary bending forming process, multiple first columns 101 and multiple first rollers 102 of the first rolling assembly 1 are linearly arranged in the Y direction, multiple second columns 201 and multiple second rollers 202 of the second rolling assembly 2 are linearly arranged in the Y direction, and multiple third columns 301 and multiple third rollers 302 of the third rolling assembly 3 are linearly arranged in the Y direction.

[0047] S4: Measurement of contour dimension deviation: Measure the contour dimension deviation of the secondary bent plate member 603. According to the contour dimension deviation, readjust the set parameters in step S2 and step S3, and repeat step S2 to step S4 until the latest measured contour dimension deviation meets the design requirements. Then save the latest set parameters in step S2 and step S3 for mass production, so as to mass-produce the curved panel 604 with high contour dimension accuracy and meeting the design requirements.

[0048] Since the forming method of the large thin-walled hyperbolic cold screen fan segment panel in the second aspect embodiment of the present invention uses the forming device of the large thin-walled hyperbolic cold screen fan segment panel in the first aspect embodiment of the present invention for forming, therefore, the forming method of the large thin-walled hyperbolic cold screen fan segment panel in the second aspect embodiment of the present invention has basically the same technical effects as the forming device of the large thin-walled hyperbolic cold screen fan segment panel in the first aspect embodiment of the present invention, which will not be elaborated here.

[0049] In some embodiments, such as Figure 3 and Figure 4 shown, in step S2, the multiple first rollers 102 in the first rolling assembly 1 maintain the same height, the multiple second rollers 202 in the second rolling assembly 2 maintain the same height, and the multiple third rollers 302 in the third rolling assembly 3 maintain the same height. In this way, it is beneficial to complete the primary surface forming in the first bending direction M and obtain the primary bent plate member 602.

[0050] In some embodiments, the pose direction of the primary bent plate member 602 during feeding in step S3 rotates 90 degrees relative to the pose direction of the to-be-formed sheet material 601 during feeding in step S2. In this way, it is beneficial to complete the secondary surface forming in the second bending direction N and obtain the secondary bent plate member.

[0051] In some embodiments, such as Figure 1b shown, there are four to-be-formed curved panels 604 divided from the single large thin-walled hyperbolic cold screen fan segment 6 along the D-shaped circumferential direction, which are respectively the above-mentioned C-shaped segment hyperbolic panel 6041, single-curvature panel 6042, upper connecting hyperbolic panel 6043 located between the top of the single-curvature panel 6042 and the top of the C-shaped segment hyperbolic panel 6041, and lower connecting hyperbolic panel 6044 located between the bottom of the single-curvature panel 6042 and the bottom of the C-shaped segment hyperbolic panel 6041; among them, the forming method of the single-curvature panel 6042 omits step S3.

[0052] In the prior art, the C-shaped section located on the outer side from the top to the bottom of the large thin-walled hyperbolic cold shield segment 6 is usually subdivided into about five curved panels, which increases the number of welding operations, enlarges the welding workload, results 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 on the outer side from the top to the bottom of the large thin-walled hyperbolic cold shield segment 6 is formed as a large curved panel 604 (i.e., the hyperbolic panel 6041 of the C-shaped section), which can reduce the number of butt welding operations after forming each curved panel 604 of a single large thin-walled hyperbolic cold shield segment 6. At the same time, the I-shaped section on the inner side from the top to the bottom of the large thin-walled hyperbolic cold shield segment 6 is further divided into three panels: a single-curvature panel 6042, an upper connecting hyperbolic panel 6043, and a lower connecting hyperbolic panel 6044. The forming method of the single-curvature panel 6042 omits step S3. Thus, the curved panels to be formed divided along the D-shaped circumferential direction of a single large thin-walled hyperbolic cold shield segment 6 are convenient to form, reducing the welding workload of the butt welding of the curved panels of a single large thin-walled hyperbolic cold shield segment 6, having high production efficiency of the large thin-walled hyperbolic cold shield segment 6, and enabling effective control of welding deformation.

[0053] The third aspect of the present invention proposes a cold shield.

[0054] For the cold shield according to the embodiment of the third aspect of the present invention, the large thin-walled hyperbolic cold shield segment 6 of the cold shield is formed by butt welding a plurality of corresponding curved panels 604 obtained by the forming method of the large thin-walled hyperbolic cold shield segment panel according to the embodiment of the second aspect of the present invention.

[0055] Since the large thin-walled hyperbolic cold shield segment panel of the cold shield according to the embodiment of the third aspect of the present invention is obtained by using the forming method of the large thin-walled hyperbolic cold shield segment panel according to the embodiment of the second aspect of the present invention, therefore, the cold shield according to the embodiment of the third aspect of the present invention has substantially the same technical effects as the forming method of the large thin-walled hyperbolic cold shield segment panel according to the embodiment of the second aspect of the present invention, which will not be elaborated herein.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A forming device for the panel of a large thin-walled hyperbolic cold shield segment, characterized in that, Including: A first rolling component, the first rolling component includes a plurality of first columns and a plurality of first rollers. The plurality of first columns are arranged at intervals in a straight line along the Y direction, and the plurality of first columns are respectively independently movable along the Z direction and the X direction; the plurality of first rollers are rotatably arranged at the upper ends of the plurality of first columns one by one, and the rotation axes of the plurality of first rollers extend along the Y direction; A second rolling component, the second rolling component is arranged at an interval from the first rolling component in the X direction. The second rolling component includes a plurality of second columns and a plurality of second rollers. The plurality of second columns are arranged at intervals in a straight line along the Y direction, and the plurality of second columns are respectively independently movable along the Z direction and the X direction; the plurality of second rollers are rotatably arranged at the upper ends of the plurality of second columns one by one, and the rotation axes of the plurality of second rollers extend along the Y direction; A third rolling component, the third rolling component is arranged above between the first rolling component and the second rolling component. The third rolling component includes a plurality of third columns and a plurality of third rollers. The plurality of third columns are arranged at intervals in a straight line along the Y direction, and the plurality of third columns are respectively independently movable along the Z direction. The plurality of third rollers are rotatably arranged at the lower ends of the plurality of third columns one by one, and the rotation axes of the plurality of second rollers extend along the Y direction.

2. The large thin-walled hyperbolic cold screen fan segment panel forming device according to claim 1, wherein, The plurality of first columns and the plurality of second columns are arranged in a one-to-one facing arrangement in the X direction. The plurality of first columns and the plurality of second columns are arranged in a one-to-one vertical facing arrangement in the YZ projection plane with the plurality of third columns in the YZ projection plane. The plurality of first rollers and the plurality of second rollers are arranged in a one-to-one vertical facing arrangement in the YZ projection plane with the plurality of third rollers in the YZ projection plane.

3. The large thin-walled hyperbolic cold screen fan section panel forming device according to claim 1, characterized in that, The cross-sections of the outer circumferences of the plurality of first rollers, the plurality of second rollers and the plurality of third rollers in the Y direction are convex arcs.

4. The large thin-walled hyperbolic cold screen fan segment panel forming device according to claim 1, wherein The outer diameter sizes of the plurality of first rollers are the same, the outer diameter sizes of the plurality of second rollers are the same, and the outer diameter sizes of the plurality of third rollers are the same.

5. The large thin-walled hyperbolic cold screen fan segment panel forming device according to claim 1, wherein It further includes a first base and a second base, the first base and the second base are arranged at an upper and lower interval in the Z direction; the first rolling component, the second rolling component and the third rolling component 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.

6. A forming method for a panel of a large thin-walled hyperbolic cold shield segment, characterized in that The large thin-walled hyperbolic cold screen fan section panel is a to-be-formed curved panel divided from the large thin-walled hyperbolic cold screen fan section along the D-shaped circumferential direction. The number of to-be-formed curved panels divided from a single large thin-walled hyperbolic cold screen fan section along the D-shaped circumferential direction is 2 to 4, including a C-shaped section hyperbolic panel located on the outer side from the top to the bottom of the large thin-walled hyperbolic cold screen fan section; the curved panel is formed by using the large thin-walled hyperbolic cold screen fan section panel forming device according to any one of claims 1 to 5, and includes the following steps: S1: Blanking; blank the sheet according to the developed size of the curved panel to be formed plus the machining allowance to obtain the sheet to be formed; S2: Primary bending forming: According to the curvature distribution in the first bending direction of the curved panel to be formed, preset the same rotational speed for all the first rollers, all the second rollers, and all the third rollers, and preset the Z-direction spacing between multiple first rollers, multiple second rollers, and multiple third rollers and the X-direction spacing between the first roller and the second roller during the primary plate rolling process through a computer program. Among them, the first bending direction is consistent with the D-shaped circumferential direction of the large thin-walled hyperbolic cold screen segment; Feed the sheet to be formed into the space between the third roller, the first roller, and the second roller along the X direction, and complete the primary surface forming in the first bending direction through continuous feeding to obtain a primary bending formed plate; S3: Secondary bending forming: According to the curvature distribution in the second bending direction of the curved panel to be formed, respectively set the Z-direction heights of multiple first rollers, multiple second rollers, and multiple third rollers along the Y direction. Among them, the second bending direction is perpendicular to the first bending direction; Feed the primary bending formed plate into the space between the third roller, the first roller, and the second roller along the X direction, and complete the secondary surface forming in the second bending direction through continuous feeding to obtain a secondary bending formed plate; S4: Profile dimension deviation measurement: Measure the profile dimension deviation of the secondary bending formed plate. According to the profile dimension deviation, readjust the set parameters in steps S2 and S3, and repeat steps S2 to S4 until the latest measured profile dimension deviation meets the design requirements, and save the latest set parameters in steps S2 and S3.

7. The forming method of the large thin-walled hyperbolic cold screen fan segment panel according to claim 6, characterized in that 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.

8. The forming method of the large thin-walled hyperbolic cold screen fan section panel according to claim 6, characterized in that, The pose direction of the primary bending formed plate during feeding in step S3 rotates 90 degrees relative to the pose direction of the sheet to be formed during feeding in step S2.

9. The forming method of the large thin-walled hyperbolic cold screen fan segment panel according to claim 6, characterized in that, There are four curved panels to be formed divided along the D-shaped circumferential direction of a single large thin-walled hyperbolic cold screen segment, namely the C-shaped segment hyperbolic panel, the single-curvature panel, the upper connecting hyperbolic panel located between the top of the single-curvature panel and the top of the C-shaped segment hyperbolic panel, and the lower connecting hyperbolic panel located between the bottom of the single-curvature panel and the bottom of the C-shaped segment hyperbolic panel; Among them, the forming method of the single-curvature panel omits step S3.

10. A cold shield, characterized in that, The large thin-walled hyperbolic cold screen segment of the cold screen is formed by welding multiple corresponding curved panels obtained by the forming method of the large thin-walled hyperbolic cold screen segment panel described in any one of claims 6 to 9.

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