Compression preforming unit and compression preforming device

Abstract

The present invention relates to the technical field of compression molding, and discloses a compression preforming unit and a compression preforming device. The compression preforming unit is used for preforming a component segment with a bending segment of a long component. In the compression preforming unit, the first compression part includes a first compression profile surface, and the first compression profile surface includes a first bending profile surface segment; the second compression part includes a second compression profile surface, and the second compression profile surface includes a second bending profile surface segment; the first compression part and the second compression part can move between a mold closing position and a mold opening position. At the mold closing position, the first compression profile surface and the second compression profile surface can form the component segment profile surfaces on both sides of the component segment, and the first bending profile surface segment and the second bending profile surface segment can form the bending profile surfaces on both sides of the bending segment. After a plurality of such compression preforming units are assembled to form a compression preforming device, the forming quality of the preform of the longeron with a curved surface can be effectively ensured, so as to improve the forming efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of compression molding, and more particularly to a compression preforming unit and a compression preforming device having such a compression preforming unit. Background Art

[0002] At present, the airframe of an aircraft usually includes stringers. Stringers are usually made of resin matrix composites. Resin matrix composites have the characteristics of light weight, high strength, high modulus, fatigue resistance, corrosion resistance, good designability and processability, and are ideal aerospace structural materials. Therefore, this material has become the main structural material of the airframe of aircraft.

[0003] One manufacturing method of the existing hat-shaped stringers is manual laying, but this manufacturing method has the problems of low molding efficiency and poor quality consistency. Another manufacturing method is the hot compression preforming method, that is, the prepreg sheet is added into a metal die, and the sheet is deformed into a preform through heating, pressurization, shape retention, and cooling. The preform of the straight section stringer obtained by this hot compression preforming method is fully compacted, has good preforming quality, and high manufacturing efficiency.

[0004] However, for stringers with hyperbolic torsion characteristics, the preforms obtained by this hot compression preforming method often have problems such as poor temperature uniformity, wrinkles, and uneven compaction, resulting in high costs and low efficiency. Summary of the Invention

[0005] In view of at least some of the above problems existing in the prior art, the present invention provides a compression preforming unit. After a plurality of such compression preforming units are assembled to form a compression preforming device, the forming quality of the preform of the stringer with a curved surface can be effectively ensured to improve the forming efficiency.

[0006] To achieve the above object, in a first aspect, the present invention provides a compression preforming unit for preforming a component section having a bent section of a long component, the bent section extending in the length direction of the long component. The compression preforming unit includes: a first compression part including a first compression profile adapted to a component profile on one side of the component section, the first compression profile including a first bent profile section adapted to a bent profile on one side of the bent section; a second compression part including a second compression profile adapted to a component profile on the other side of the component section, the second compression profile including a second bent profile section adapted to a bent profile on the other side of the bent section. The first compression part and the second compression part are movable between a closed die position and an open die position. In the closed die position, the first compression profile and the second compression profile can form the component profiles on both sides of the component section, and the first bent profile section and the second bent profile section can form the bent profiles on both sides of the bent section.

[0007] In this technical solution, since the first compression part includes a first compression profile adapted to a component profile on one side of the component section, and the first compression profile includes a first bent profile section adapted to a bent profile on one side of the bent section of the component section, and the second compression part includes a second compression profile adapted to a component profile on the other side of the component section, and the second compression profile includes a second bent profile section adapted to a bent profile on the other side of the bent section of the component section, and in the closed die position, the first compression profile and the second compression profile can form the component profiles on both sides of the component section. Correspondingly, the first bent profile section and the second bent profile section can form the bent profiles on both sides of the bent section. Thus, in actual use, multiple such compression preforming units are arranged along the length direction of the long component to form a compression preforming device. In this compression preforming device, multiple first compression profiles form a first profile extending along the length direction of the long component, and multiple first bent profile sections form a first bent profile extending along the length direction of the long component. Similarly, multiple second compression profiles form a second profile extending along the length direction of the long component, and multiple second bent profile sections form a second bent profile extending along the length direction of the long component. And in the closed die position, the first profile and the second profile can form the component profiles on both sides of the long component, and the first bent profile and the second bent profile can form the bent profiles on both sides of the long component. In this way, the compression preforming device can form a preform of a stringer with a curved surface with high quality, so that the temperature of the preform is uniform, and problems such as wrinkles and uneven compaction will not occur, thereby effectively ensuring the forming quality of the preform of the stringer with a curved surface, especially the stringer with a hyperbolic torsion feature, to improve the forming efficiency.

[0008] In some embodiments, a first runner is formed within a part of the width direction of the elongated member. The first runner extends along the length direction of the elongated member and is configured to allow a fluid to flow therethrough for heating or cooling the first molding surface. A second runner is formed within a part of the width direction of the elongated member. The second runner extends along the length direction of the elongated member and is configured to allow a fluid to flow therethrough for heating or cooling the second molding surface. Wherein, the first runner and the second runner are arranged offset in the width direction of the elongated member.

[0009] In some embodiments, the second molding portion is formed with two sets of the second runners spaced apart in the width direction of the elongated member, wherein the first runner is located between the two sets of the second runners.

[0010] In some embodiments, the first molding portion includes a plurality of first modules arranged in the width direction of the elongated member. Each first module includes a first module surface, and the plurality of first module surfaces constitute the first molding surface.

[0011] In some embodiments, each first module includes a first connection base and a first mold core. The first mold core has the first module surface. Wherein, in the length direction of the elongated member, the first mold core is detachably fixedly connected to the first connection base only at its middle position.

[0012] In some embodiments, a first runner extending along the length direction of the elongated member is formed in a part of the plurality of first modules. The first runner is configured to allow a fluid to flow therethrough for heating or cooling its own first module surface.

[0013] In some embodiments, the first runner is arranged close to the first module surface.

[0014] In some embodiments, a plurality of connected first runners are formed in one first module.

[0015] In some embodiments, the first runner is a first straight runner.

[0016] In some embodiments, a part of the first modules includes a first connection base and a first mold core that are detachably connected together. A first heat insulation layer is provided between the first connection base and the first mold core. Wherein, the first mold core has the first module surface, and the first runner is formed in the first mold core.

[0017] In some embodiments, the second molding portion includes a plurality of second modules arranged in the width direction of the elongated member, and each second module includes a second module profile, and the plurality of second module profiles form the second molding profile.

[0018] In some embodiments, each second module includes a second connecting seat and a second mold core, the second mold core has the second module profile, and wherein, in the length direction of the elongated member, the second mold core is detachably and fixedly connected to the second connecting seat only at its middle position.

[0019] In some embodiments, a second flow channel extending in the length direction of the elongated member is formed in a part of the plurality of second modules, and the second flow channel is used for fluid to flow through to heat or cool the second module profile of itself.

[0020] In some embodiments, the second flow channel is arranged close to the second module profile.

[0021] In some embodiments, each of a part of the second modules forms a plurality of connected second flow channels.

[0022] In some embodiments, the second flow channel includes an auxiliary straight flow channel and a second straight flow channel group spaced apart in the length direction of the elongated member, and each second straight flow channel group includes a plurality of second straight flow channels spaced apart in the width direction of the elongated member, and wherein, the spaced second straight flow channel groups are connected through the auxiliary straight flow channel.

[0023] In some embodiments, a part of the second modules include a second connecting seat and a second mold core detachably connected together, and a second heat insulation layer is provided between the second connecting seat and the second mold core, and wherein, the second mold core has the second module profile, and the second flow channel is formed in the second mold core.

[0024] In addition, in a second aspect, the present invention provides a compression preforming device, which includes more than one compression preforming unit as described in any of the first aspects above. The plurality of compression preforming units are arranged along the length direction of the elongated member, so that: the plurality of first compression profiles form a first profile extending along the length direction of the elongated member, and the first profile includes a first curved profile composed of a plurality of the first curved profile segments and extending along the length direction of the elongated member; the plurality of second compression profiles form a second profile extending along the length direction of the elongated member, and the second profile includes a second curved profile composed of a plurality of the second curved profile segments and extending along the length direction of the elongated member; wherein, at the mold closing position, the first profile and the second profile can form the component profiles on both sides of the elongated member, and wherein, the first curved profile and the second curved profile can form the curved profiles on both sides of the elongated member.

[0025] As described above, a plurality of compression preforming units as described in any of the first aspects above are arranged along the length direction of the elongated member to form a compression preforming device. In this compression preforming device, the plurality of first compression profiles form a first profile extending along the length direction of the elongated member, and a plurality of first curved profile segments form a first curved profile extending along the length direction of the elongated member. Similarly, the plurality of second compression profiles form a second profile extending along the length direction of the elongated member, and a plurality of second curved profile segments form a second curved profile extending along the length direction of the elongated member. And at the mold closing position, the first profile and the second profile can form the component profiles on both sides of the elongated member, and the first curved profile and the second curved profile can form the curved profiles on both sides of the elongated member. In this way, the compression preforming device can form a preform of a stringer with a curved surface with high quality, so that the temperature of the preform is uniform, and problems such as wrinkles and uneven compaction will not occur, thereby effectively ensuring the forming quality of the preform of the stringer with a curved surface, especially the stringer with a hyperbolic torsion feature, so as to improve the forming efficiency.

[0026] In some embodiments, when the compression preforming unit includes a first runner and / or a second runner, the runners between the plurality of compression preforming units are independent of each other.

[0027] In some embodiments, there is a thermal expansion gap between adjacent compression preforming units, wherein when the plurality of compression preforming units are heated to a predetermined temperature, the adjacent compression preforming units thermally expand to contact each other.

[0028] In some embodiments, the pre-molding device further includes a bottom platform mechanism and an upper moving mechanism, wherein the first molding part of each of the pre-molding units is arranged on the upper moving mechanism, and the second molding part of each of the pre-molding units is arranged on the bottom platform mechanism, wherein the upper moving mechanism can drive the first molding part to rise and fall so that the first molding part and the second molding part can move between a closing position and an opening position.

[0029] In some embodiments, along the length direction of the elongated component, each of the first molded parts is detachably disposed on the upper moving mechanism only at its middle position, and each of the second molded parts is detachably disposed on the bottom platform mechanism only at its middle position.

[0030] In some embodiments, when the first molding part includes a plurality of first modules arranged in the width direction of the elongated part, and the second molding part includes a plurality of second modules arranged in the width direction of the elongated part, the upper moving mechanism drives the first molding part to descend so that after the first molding part and the second molding part are molded together, some driving units of the upper moving mechanism and corresponding some supporting units of the bottom platform mechanism can drive corresponding some of the first modules and some of the second modules to continue to descend by a preset movement amount.

[0031] It will be apparent that elements or features described above in the context of a single embodiment may be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In the drawings, the sizes and proportions do not represent the sizes and proportions of actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0033] Figure 1 Schematic diagram of a three-dimensional structure showing a bottom perspective of a compression molding preforming unit according to an embodiment of the present invention.

[0034] Figure 2 Schematic diagram of the end view of a compression molding preforming unit according to an embodiment of the present invention.

[0035] Figure 3 yes Figure 1 A schematic three-dimensional structural diagram of a second mold core of a pre-molding unit of the present invention is shown, wherein the second flow channel inside the second mold core is shown in a dotted line manner.

[0036] Figure 4 yes Figure 1Schematic top view of a second mold core of a compression preforming unit, in which a layout of a second runner inside is shown in dashed lines.

[0037] Figure 5 is Figure 1 Schematic side view of a first mold core of a compression preforming unit, in which a layout of a first runner inside is shown in dashed lines.

[0038] Figure 6 are multiple Figure 1 Schematic side view of a compression preforming device formed by arranging compression preforming units along the length direction of a long component.

[0039] Figure 7 Schematic diagram showing the fixation of each compression preforming unit.

[0040] Figure 8 is Figure 6 Schematic end view at a position of a compression preforming device.

[0041] Explanation of reference numerals

[0042] 1 - First compression part, 11 - First compression profile, 111 - First curved profile section, 12 - First runner, 13 - First module, 131 - First module profile, 132 - First connection seat, 133 - First mold core, 134 - First heat insulation layer;

[0043] 2 - Second compression part, 21 - Second compression profile, 211 - Second curved profile section, 22 - Second runner, 221 - Auxiliary straight runner, 222 - Second straight runner group, 223 - Second straight runner, 23 - Second module, 231 - Second module profile, 232 - Second connection seat, 233 - Second mold core, 234 - Second heat insulation layer;

[0044] 3 - Compression preforming unit;

[0045] 4 - First profile, 41 - First curved profile;

[0046] 5 - Second profile, 51 - Second curved profile;

[0047] 6 - Thermal expansion gap;

[0048] 7 - Bottom platform mechanism, 71 - Support unit;

[0049] 8 - Upper moving mechanism, 81 - Driving unit. Detailed implementation manners

[0050] The present invention will be described in detail with reference to the accompanying drawings. What is described here is only the preferred embodiment of the present invention. Those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and such other ways also fall within the scope of the present invention.

[0051] In a first aspect, referring to Figure 1 and Figure 2 as well as Figure 6 , the compression preforming unit 3 provided by the present invention is used for preforming a component section with a bent section of a long component, and the bent section extends in the length direction of the long component. Wherein, the compression preforming unit 3 includes a first compression part 1 and a second compression part 2. The first compression part 1 includes a first compression profile 11 adapted to the component section profile on one side of the component section, and the first compression profile 11 includes a first bent profile section 111 adapted to the bent profile on one side of the bent section; the second compression part 2 includes a second compression profile 21 adapted to the component section profile on the other side of the component section, and the second compression profile 21 includes a second bent profile section 211 adapted to the bent profile on the other side of the bent section; wherein, the first compression part 1 and the second compression part 2 can move between a closed mold position and an open mold position. In the closed mold position, the first compression profile 11 and the second compression profile 21 can form the component section profiles on both sides of the component section, and wherein, the first bent profile section 111 and the second bent profile section 211 can form the bent profiles on both sides of the bent section.

[0052] In the compression preforming unit 3, since the first compression part 1 includes a first compression profile 11 adapted to the profile of one side component segment of the component segment, and the first compression profile 11 includes a first curved profile segment 111 adapted to the curved profile of one side of the curved segment of the component segment, the second compression part 2 includes a second compression profile 21 adapted to the profile of the other side component segment of the component segment, and the second compression profile 21 includes a second curved profile segment 211 adapted to the curved profile of the other side of the curved segment of the component segment. And at the closed die position, the first compression profile 1 and the second compression profile 2 can form the component segment profiles on both sides of the component segment. Correspondingly, the first curved profile segment 111 and the second curved profile segment 211 can form the curved profiles on both sides of the curved segment. Thus, in actual use, a plurality of such compression preforming units 3 are arranged along the length direction of the elongated component to form a compression preforming device. In this compression preforming device, a plurality of first compression profiles 11 form a first profile 4 extending along the length direction of the elongated component, and a plurality of first curved profile segments 111 form a first curved profile 41 extending along the length direction of the elongated component. Similarly, a plurality of second compression profiles 21 form a second profile 5 extending along the length direction of the elongated component, and a plurality of second curved profile segments 211 form a second curved profile 51 extending along the length direction of the elongated component. And at the closed die position, the first profile 4 and the second profile 5 can form the component profiles on both sides of the elongated component, and the first curved profile 41 and the second curved profile 51 can form the curved profiles on both sides of the elongated component. Thus, the compression preforming device can form the preform of the stringer with a curved surface with high quality, so that the temperature of the preform is uniform, and problems such as wrinkles and uneven compaction will not occur, thereby effectively ensuring the forming quality of the preform of the stringer with a curved surface, especially the stringer with a hyperbolic torsion feature, so as to improve the forming efficiency.

[0053] In some embodiments of the compression preforming unit 3, in order to further improve the preforming efficiency of the elongated component, referring to Figure 1 and Figure 2, a first molding part 1 is formed with a first runner 12 inside a part along the width direction of the long-shaped part. The first runner 12 extends along the length direction of the long-shaped part. The first runner 12 is used for fluid to flow through to heat or cool the first molding surface 11. Additionally, a second molding part 2 is formed with a second runner 22 inside a part along the width direction of the long-shaped part. The second runner 22 extends along the length direction of the long-shaped part. The second runner 22 is used for fluid to flow through to heat or cool the second molding surface 21. Among them, the first runner 12 and the second runner 22 are arranged staggeredly in the width direction of the long-shaped part. In this way, the heating medium or cooling medium in the first runner 12 can heat or cool the first molding surface 11, and the heating medium or cooling medium in the second runner 22 can heat or cool the second molding surface 21. At the same time, because the first runner 12 and the second runner 22 are arranged staggeredly in the width direction of the long-shaped part, this can further improve the uniformity and efficiency of heating and cooling of the sheet between the first molding surface 11 and the second molding surface 21.

[0054] Additionally, in other alternative embodiments, the first runner 12 and the second runner 22 can be arranged in alignment in the width direction of the long-shaped part.

[0055] Furthermore, the number of the first runner 12 and the second runner 22 can be one respectively, or more than two. For example, in some embodiments, referring to Figure 1 and Figure 2 , the second molding part 2 is formed with two groups of second runners 22 spaced apart in the width direction of the long-shaped part. Among them, the first runner 12 is located between the two groups of second runners 22. In this way, the number of the first runners 12 can be correspondingly reduced. At the same time, through this layout of the runners, the uniformity and efficiency of heating and cooling of the sheet between the first molding surface 11 and the second molding surface 21 can be ensured.

[0056] Furthermore, in some embodiments of this molding preforming unit, the first molding part 1 can be an integral part. Or, in some other embodiments of this molding preforming unit, referring to Figure 1 and Figure 2 , the first molding part 1 includes a plurality of first modules 13 arranged in the width direction of the long-shaped part. For example, Figure 2 the three first modules 13 at the left, middle, and right positions shown in the graphical interface. Among them, each first module 13 includes a first module surface 131. The plurality of first module surfaces 131 form the first molding surface 11. In this way, because the first molding part 1 includes a plurality of first modules 13, the number of the first modules 13 can be adjusted according to the actual width of the long-shaped part, so that different first modules 13 are adapted to different surfaces of the long-shaped part, thereby better forming different surfaces of the long-shaped part.

[0057] In addition, in some embodiments, the first module 13 may be an integral module. In other embodiments, referring to Figure 1 and Figure 2 , each first module 13 includes a first connecting seat 132 and a first core 133. The first core 133 has a first module profile 131. Among them, in the length direction of the elongated member, the first core 133 is detachably and fixedly connected to the first connecting seat 132 only at its middle position. In this way, during heating and cooling, the first core 133 can deform correspondingly to both sides of the middle position, so that the first core 133 can further better extrude the sheet material to better form the component profile on one side of the component segment.

[0058] In addition, the first connecting seat 132 and the first core 133 can be made of any material. For example, they can be made of the same material or different materials. For example Figure 2 in, both the first connecting seat 132 and the first core 133 of the middle first module 13 can be made of aluminum alloy. The first connecting seats 132 of the left and right first modules 13 can be cast aluminum bodies, while the first cores 133 can be made of wood. The first connecting seat 132 and the first core 133 can be fixedly connected in various ways, such as by using screws or pin positioning.

[0059] In addition, in some embodiments, each of the plurality of first modules 13 may be formed with a first flow channel 12. For example, each first core 133 may be formed with a first flow channel 12. Or, in other embodiments, referring to Figure 2 , a first flow channel 12 extending along the length direction of the elongated member is formed in a part of the plurality of first modules 13, and the first flow channel 12 is used for fluid to flow through to heat or cool its own first module profile 131. For example, Figure 2 a first flow channel 12 is formed in the middle first module 13 for fluid to flow through, so as to heat or cool the first module profile 131 of the middle first module 13.

[0060] In addition, in some embodiments, in the height direction of the first module 13, the first flow channel 12 may be provided at the middle position of the first module 13. Or, in other embodiments, referring to Figure 2 , the first flow channel 12 is arranged close to the first module profile 131. In this way, the medium in the first flow channel 12 can more easily heat or cool the first module profile 131. For example, in Figure 2 , the first module profile 131 has a U-shaped shape, and the first flow channel 12 is located inside the U shape. In this way, the first flow channel 12 can cool and heat the bottom profile, left profile and right profile of the first module profile 131 simultaneously.

[0061] In addition, the number of the first flow channels 12 can be one or more. In some embodiments, a plurality of connected first flow channels 12 are formed in one first module 1. Refer to Figure 5 . At this time, the plurality of first flow channels 12 can be arranged in the Figure 2 height direction, or can be arranged in the Figure 2 width direction, or can be arranged in rows and columns in the Figure 2 height and width directions. For example, in the embodiment shown in Figure 1 , three first flow channels 12 spaced apart in the height direction are formed in the middle first die core 133, and the three first flow channels 12 can communicate with each other at any position.

[0062] In addition, in some embodiments, the first flow channels 12 and the second flow channels 22 can have various shapes. For example, the first flow channels 12 and the second flow channels 22 can be curved shapes such as arcs or straight flow channels. For example, in some embodiments, the first flow channel 12 can be a first straight flow channel, such as a first straight flow channel that extends obliquely along the length direction of the long-shaped component. In this way, for the first curved surface section 111 and the second curved surface section 211 with a relatively large curvature, through the straight flow channel, the first flow channel 12 and the second flow channel 22 can be conveniently processed in the first module 13 and the second molding part 2 at a relatively low cost.

[0063] In addition, in some embodiments, refer to Figure 5 . According to the different positions of the molding preforming unit 3 in the molding preforming device, in some molding preforming units 3 at both ends of the molding preforming device, some of the first flow channels 12 can be straight flow channels extending horizontally, and some of the first flow channels 12 can be straight flow channels extending obliquely. In some molding preforming units 3 at the middle position of the molding preforming device, the first flow channels 12 can be straight flow channels extending obliquely.

[0064] In addition, in some embodiments, refer to Figure 1 and Figure 2 . A part of the first module 13 includes a first connecting seat 132 and a first die core 133 that are detachably connected together. A first heat insulation layer 134 is provided between the first connecting seat 132 and the first die core 133. Among them, the first die core 133 has a first module surface 131, and one or more first flow channels 12 are formed in the first die core 133. In this way, through the first heat insulation layer 134, the heat or cold released by the medium in the first flow channel 12 can be prevented from being transferred to the first connecting seat 132, so that the heating and cooling effects of the first module surface 131 on the long-shaped component can be further improved.

[0065] In addition, similar to the first pressing part 1, the second pressing part 2 can be an integral part. Alternatively, in some other embodiments of the pressing preforming unit, referring to Figure 1 and Figure 2 , the second pressing part 2 includes a plurality of second modules 23 arranged in the width direction of the long-shaped part. For example, Figure 2 as shown in the graphical interface, there are three second modules 23 at the left, middle, and right positions. Each second module 23 includes a second module profile 231, and a plurality of second module profiles 231 form the second pressing profile 21. In this way, since the second pressing part 2 includes a plurality of second modules 23, the number of second modules 23 can be adjusted according to the actual width of the long-shaped part, so that different second modules 23 can be adapted to different profiles of the long-shaped part, thereby better forming different profiles of the long-shaped part.

[0066] In addition, in some embodiments, the second module 23 can be an integral module. In some other embodiments, referring to Figure 1 and Figure 2 , each second module 23 includes a second connecting seat 232 and a second core 233. The second core 233 has a second module profile 231. In the length direction of the long-shaped part, the second core 233 is detachably and fixedly connected to the second connecting seat 232 only at its middle position. In this way, during heating and cooling, the second core 233 can deform accordingly to both sides of the middle position, so as to further enable the second core 233 to better extrude the sheet material and better form the part profile on the other side of the part segment.

[0067] In addition, the second connecting seat 232 and the second core 233 can be made of any material. For example, they can be made of the same material or different materials. For example, Figure 2 in [example reference], the second connecting seat 232 of the middle second module 13 can be made of aluminum alloy, while the second core 233 can be made of wood. The second connecting seats 232 and the second cores 233 of the left and right second modules 23 can both be made of aluminum alloy. The second connecting seat 232 and the second core 233 can be fixedly connected in various ways, such as by using screws or pin positioning.

[0068] In addition, for the second connecting seat 232, referring to Figure 6 , in the length direction of the long-shaped part (that is, Figure 6 the left-right direction in [reference]), the structures of the second connecting seats 232 at both left and right ends can be backing plates, such as aluminum alloy backing plates, while the structure of the second connecting seat 232 in the middle part can be a bracket with weight-reducing holes, such as a cast aluminum bracket.

[0069] In addition, in some embodiments, each of the plurality of second modules 23 may be formed with a second flow channel 22. For example, each second die core 233 may be formed with a second flow channel 22. Alternatively, in some other embodiments, referring to Figure 2 , a second flow channel 22 extending along the length direction of the elongated member is formed in a part of the plurality of second modules. The second flow channel 22 is used for fluid to flow through to heat or cool the second module surface 231 of itself. For example, Figure 2 the middle second module 13 is not formed with a second flow channel 22, while the second flow channels 22 are formed in the second modules 23 on the left and right sides for fluid to flow through, so as to heat or cool the second module surfaces 231 of the second modules 23 on the left and right sides.

[0070] In addition, in some embodiments, in the height direction of the second module 23, the second flow channel 22 may be disposed at the middle position of the second module 23. Alternatively, in some other embodiments, referring to Figure 2 , the second flow channel 22 is arranged close to the second module surface 231. In this way, the medium in the second flow channel 22 can more easily heat or cool the second module surface 231. For example, in Figure 2 , four second flow channels 22 spaced apart in the width direction are respectively formed at approximately the upper-middle position in the height direction of the second die cores 233 on the left and right sides to uniformly heat and cool the second module surface 231 with a larger width.

[0071] In addition, the number of the second flow channels 22 may be one or more. In some embodiments, each of a part of the second modules 23 is formed with a plurality of connected second flow channels 22. At this time, the plurality of second flow channels 22 may be arranged in Figure 2 the height direction, or may be arranged in Figure 2 the width direction, or may be arranged in rows and columns in Figure 2 the height and width directions. For example, in the embodiment shown in Figure 1 , the second die cores 233 on the left and right sides are respectively formed with three second flow channels 22 spaced apart in the width direction, and the three second flow channels 22 may be connected to each other at any position. For another example, in the embodiment shown in Figure 2 , the second die cores 233 on the left and right sides are respectively formed with four second flow channels 22 spaced apart in the width direction, and the four second flow channels 22 may be connected to each other at any position.

[0072] In addition, in some embodiments, the second flow channel 22 can have various shapes. For example, the second flow channel 22 can be a curved shape such as an arc, or in some other embodiments, the second flow channel 22 can be a straight flow channel. In this way, for the second modular surface 231 with a relatively large curvature, through the straight flow channel, the second flow channel 22 can be conveniently machined on the mold core with a curved surface section at a relatively low cost.

[0073] For example, in some embodiments, referring to Figure 3 and Figure 4 , the second flow channel 22 includes an auxiliary straight flow channel 221 and a second straight flow channel group 222 spaced in the length direction of the long-shaped component. Each second straight flow channel group 222 includes a plurality of second straight flow channels 223 spaced in the width direction of the long-shaped component, wherein the spaced second straight flow channel groups 222 are connected through the auxiliary straight flow channel 221. For example, in Figure 3 , the second straight flow channel 223 can be a second straight flow channel that extends obliquely along the length direction of the long-shaped component. In this way, for the second modular surface 231 with a relatively large curvature, through the auxiliary straight flow channel 221 and the second straight flow channel group 222 spaced in the length direction of the long-shaped component, the second flow channel 22 can be conveniently machined on the mold core with a curved surface section at a relatively low cost.

[0074] In addition, in some embodiments, referring to Figure 1 and Figure 2 , a part of the second module includes a second connecting seat 232 and a second mold core 233 detachably connected together. A second heat insulation layer 234 is provided between the second connecting seat 232 and the second mold core 233. Among them, the second mold core 233 has a second modular surface 231, and the second flow channel 22 is formed in the second mold core 233. In this way, through the second heat insulation layer 234, the heat or cold quantity dissipated by the medium in the second flow channel 22 can be prevented from being transferred to the second connecting seat 232, thereby further improving the heating and cooling effects of the second modular surface 231 on the long-shaped component.

[0075] In addition, the molding preforming unit 3 provided by the present invention can be multiple. The multiple molding preforming units 3 have basically the same structure. The difference structures between the respective molding preforming units 3 can lie in the different bending degrees of the first curved surface section 111 and the different bending degrees of the second curved surface section 211. Referring to Figure 6 , in this way, it can correspond to the bending degrees of different positions of the long-shaped component in the length direction.

[0076] In a second aspect, the present invention provides a molding preforming device, referring to Figure 6 , Figure 7 and Figure 8, the compression preforming device includes more than one compression preforming unit 3 as described in any of the above first aspects. The multiple compression preforming units 3 are arranged along the length direction of the long-shaped component, so that: multiple first compression profiles 11 form a first profile 4 extending along the length direction of the long-shaped component. The first profile 4 includes a first curved profile 41 composed of multiple first curved profile segments 111 and extending along the length direction of the long-shaped component; multiple second compression profiles 21 form a second profile 5 extending along the length direction of the long-shaped component. The second profile 5 includes a second curved profile 51 composed of multiple second curved profile segments 211 and extending along the length direction of the long-shaped component; wherein, in the mold closing position, the first profile 4 and the second profile 5 can form the component profiles on both sides of the long-shaped component, and wherein the first curved profile 41 and the second curved profile 51 can form the curved profiles on both sides of the long-shaped component.

[0077] In this way, since multiple such compression preforming units 3 as described in any of the above first aspects are arranged along the length direction of the long-shaped component to form a compression preforming device, in this compression preforming device, multiple first compression profiles 11 form a first profile 4 extending along the length direction of the long-shaped component, and multiple first curved profile segments 111 form a first curved profile 41 extending along the length direction of the long-shaped component. Similarly, multiple second compression profiles 21 form a second profile 5 extending along the length direction of the long-shaped component, and multiple second curved profile segments 211 form a second curved profile 51 extending along the length direction of the long-shaped component. And in the mold closing position, the first profile 4 and the second profile 5 can form the component profiles on both sides of the long-shaped component, and the first curved profile 41 and the second curved profile 51 can form the curved profiles on both sides of the long-shaped component. In this way, the compression preforming device can form the preform of the longeron with a curved surface with high quality, so that the temperature of the preform is uniform, and problems such as wrinkles and uneven compaction will not occur, thus effectively ensuring the forming quality of the preform of the longeron with a curved surface, especially the longeron with a hyperbolic torsion characteristic, so as to improve the forming efficiency.

[0078] In addition, in some embodiments, when the compression preforming unit 3 includes a first runner 12 and / or a second runner 22, the runners between the multiple compression preforming units 3 are independent of each other. In this way, each compression preforming unit 3 adopts separate temperature control. Therefore, according to the forming requirements of the profiles at different positions of the long-shaped component, the corresponding compression preforming unit 3 at the corresponding position can be separately input with a medium to achieve heating and cooling that meet the forming requirements, so as to better form the long-shaped component.

[0079] In addition, in some embodiments, referring to Figure 7, there is a thermal expansion gap 6 between adjacent compression preforming units 3. When multiple compression preforming units 3 are heated to a predetermined temperature, the adjacent compression preforming units 3 thermally expand and come into contact with each other. In this way, when heated, the die cores of the respective compression preforming units 3 can deform towards both sides accordingly, so that the die cores can further better extrude the sheet material to better form the long-shaped component.

[0080] In addition, referring to Figure 8 , the compression preforming device further includes a bottom platform mechanism 7 and an upper moving mechanism 8. Each first compression part 1 of each compression preforming unit 3 is arranged on the upper moving mechanism 8, and each second compression part 2 of each compression preforming unit 3 is arranged on the bottom platform mechanism 7. The upper moving mechanism 8 can drive the first compression part 1 to move up and down so that the first compression part 1 and the second compression part 2 move between the mold closing position and the mold opening position. In this way, the upper moving mechanism 8 can drive the corresponding first compression part 1 to move up and down for forming. In addition, in some embodiments, multiple first compression parts 1 can correspond to respective independent upper moving mechanisms 8. Or, in some other embodiments, multiple first compression parts 1 can be arranged on one upper moving mechanism 8. Or, in some other embodiments, some first compression parts 1 can be arranged on one upper moving mechanism 8, and some other first compression parts 1 can be arranged on another upper moving mechanism 8.

[0081] In addition, in some embodiments, referring to Figure 6 and Figure 7 , along the length direction of the long-shaped component, each first compression part 1 is detachably arranged on the upper moving mechanism 8 only at its middle position, and each second compression part 2 is detachably arranged on the bottom platform mechanism 7 only at its middle position. In this way, when heated and cooled, the die cores of the respective compression preforming units 3 can deform more easily, so that the die cores can further better extrude the sheet material to better form the long-shaped component.

[0082] In addition, in some embodiments, through the segmented design of multiple compression preforming units 3, and each compression preforming unit 3 is connected and fixed only at its middle position. In this way, when heated and cooled, since the length of each compression preforming unit 3 is short, the deformation amount is small, and a gap for thermal expansion and contraction is arranged between adjacent compression preforming units 3. Therefore, the contour error of the long-shaped component (such as a double-curved stringer) after preforming can be effectively reduced.

[0083] In addition, in the case where the first molding part 1 includes a plurality of first modules 13 arranged in the width direction of the elongated member, and the second molding part 2 includes a plurality of second modules 23 arranged in the width direction of the elongated member, after the upper moving mechanism 8 drives the first molding part 1 to descend so that the first molding part 1 and the second molding part 2 are closed, some driving units 81 of the upper moving mechanism 8 and some corresponding supporting units 71 of the bottom platform mechanism 7 can drive some corresponding first modules 13 and some second modules 23 to continue to descend by a preset moving amount. In this way, a required specific profile can be formed in the width direction and / or the length direction of the elongated member. For example, in Figure 8 , a groove-shaped structure similar to a U shape can be formed in the width direction of the elongated member. For example, a double-curved hat-shaped stringer preform can be formed.

[0084] The protection scope of the present invention is only defined by the claims. Benefiting from the teachings of the present invention, those skilled in the art can easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to produce new embodiments, which also fall within the scope of the appended claims.

Claims

1. A compression preforming unit, characterized in that, the compression preforming unit (3) is used for preforming a component segment with a bent segment of an elongate component, the bent segment extending in the length direction of the elongate component, wherein the compression preforming unit (3) comprises: a first compression part (1), the first compression part (1) comprising a plurality of first modules (13) arranged in the width direction of the elongate component, each first module (13) comprising a first core (133), the first core (133) having a first module profile (131), a plurality of the first module profiles (131) forming a first compression profile (11) adapted to the component segment profile on one side of the component segment, the first compression profile (11) comprising a first bent profile segment (111) adapted to the bent profile on one side of the bent segment, wherein the middle first core (133) is made of aluminum alloy and formed with a first flow channel (12) for fluid to pass through for heating or cooling, and the first cores (133) on both sides are made of wood; a second compression part (2), the second compression part (2) comprising a plurality of second modules (23) arranged in the width direction of the elongate component, each second module (23) comprising a second core (233), the second core (233) having a second module profile (231), a plurality of the second module profiles (231) forming a second compression profile (21) adapted to the component segment profile on the other side of the component segment, the second compression profile (21) comprising a second bent profile segment (211) adapted to the bent profile on the other side of the bent segment, wherein the middle second core (233) is made of wood, and the second cores (233) on both sides are made of aluminum alloy and respectively formed with second flow channels (22) for fluid to pass through for heating or cooling; wherein, the first compression part (1) and the second compression part (2) can move between a closed die position and an open die position, and in the closed die position, the first compression profile (11) and the second compression profile (21) can form the component segment profiles on both sides of the component segment, wherein the first bent profile segment (111) and the second bent profile segment (211) can form the bent profiles on both sides of the bent segment.

2. The compression preforming unit according to claim 1, characterized in that, the first flow channel (12) extends along the length direction of the elongate component; the second flow channel (22) extends along the length direction of the elongate component.

3. The compression preforming unit according to claim 1, characterized in that, each first module (13) comprises a first connecting seat (132), wherein, in the length direction of the elongate component, the first core (133) is detachably and fixedly connected only at its middle position and the first connecting seat (132).

4. The compression preforming unit according to claim 1, characterized in that, the first flow channel (12) is arranged close to the first module profile (131).

5. The compression preforming unit according to claim 1, characterized in that, a plurality of communicating first runners (12) are formed in one of the first cores (133).

6. The compression preforming unit according to claim 1, characterized in that, the first runner (12) is a first straight runner.

7. The compression preforming unit according to claim 1, characterized in that, a part of the first module includes a first connecting seat (132) and a first core (133) detachably connected together, and a first heat insulation layer (134) is provided between the first connecting seat (132) and the first core (133).

8. The compression preforming unit according to any one of claims 1-7, characterized in that, each of the second modules (23) includes a second connecting seat (232), wherein, in the length direction of the elongated member, the second core (233) is detachably and fixedly connected to the second connecting seat (232) only at its middle position.

9. The compression preforming unit according to claim 1, characterized in that, the second runner (22) is arranged close to the second module profile (231).

10. The compression preforming unit according to claim 1, characterized in that, a plurality of communicating second runners (22) are formed in each of the second cores (233) of a part of the second modules.

11. The compression preforming unit according to claim 1, characterized in that, the second runner (22) includes an auxiliary straight runner (221) and a second straight runner group (222) spaced in the length direction of the elongated member, and each second straight runner group (222) includes a plurality of second straight runners (223) spaced in the width direction of the elongated member, wherein the spaced second straight runner groups (222) are communicated by the auxiliary straight runner (221).

12. The compression preforming unit according to claim 1, characterized in that, a part of the second module includes a second connecting seat (232) and a second core (233) detachably connected together, and a second heat insulation layer (234) is provided between the second connecting seat (232) and the second core (233).

13. A compression preforming device, characterized in that, it includes a plurality of compression preforming units (3) according to any one of claims 1-12, and the plurality of compression preforming units (3) are arranged along the length direction of the elongated member so that: a plurality of the first compression profiles (11) form a first profile (4) extending along the length direction of the elongated member, and the first profile (4) includes a first curved profile (41) composed of a plurality of the first curved profile segments (111) and extending along the length direction of the elongated member; a plurality of the second compression profiles (21) form a second profile (5) extending along the length direction of the elongated member, and the second profile (5) includes a second curved profile (51) composed of a plurality of the second curved profile segments (211) and extending along the length direction of the elongated member; Wherein, at the mold clamping position, the first mold surface (4) and the second mold surface (5) can form the component mold surfaces on both sides of the elongated component, and wherein the first curved mold surface (41) and the second curved mold surface (51) can form the curved mold surfaces on both sides of the elongated component.

14. The compression preforming device according to claim 13, characterized in that the runners between the plurality of compression preforming units (3) are independent of each other.

15. The compression preforming device according to claim 13, characterized in that there is a thermal expansion gap (6) between adjacent compression preforming units (3), and when the plurality of compression preforming units (3) are heated to a predetermined temperature, the adjacent compression preforming units (3) thermally expand to contact each other.

16. The compression preforming device according to any one of claims 13-15, characterized in that the compression preforming device further includes a bottom platform mechanism (7) and an upper moving mechanism (8), wherein the first pressing part (1) of each compression preforming unit (3) is arranged on the upper moving mechanism (8), and the second pressing part (2) of each compression preforming unit (3) is arranged on the bottom platform mechanism (7), and wherein the upper moving mechanism (8) can drive the first pressing part (1) to move up and down so that the first pressing part (1) and the second pressing part (2) move between the mold clamping position and the mold opening position.

17. The compression preforming device according to claim 16, characterized in that along the length direction of the elongated component, the first pressing part (1) of each is detachably arranged on the upper moving mechanism (8) only at its middle position, and the second pressing part (2) of each is detachably arranged on the bottom platform mechanism (7) only at its middle position.

18. The compression preforming device according to claim 16, characterized in that after the upper moving mechanism (8) drives the first pressing part (1) to descend so that the first pressing part (1) and the second pressing part (2) are in mold clamping, some driving units (81) of the upper moving mechanism (8) and some corresponding supporting units (71) of the bottom platform mechanism (7) can drive some corresponding first modules (13) and some second modules (23) to continue to descend by a preset moving amount.

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