A hot bending forming device for composite material PMI foam

Abstract

The invention discloses a hot bending forming device for composite material PMI foam, comprising a base, a hot bending mechanism is arranged on the outside of the base, the hot bending mechanism comprises a tough plate, a fixed frame is arranged on the outside of the tough plate, the outer surface of the fixed frame is fixedly connected to the outer surface of the base, the outer surface of the tough plate is fixedly connected to a heating plate, a plurality of groups of heating plates are arranged at equal distances in the transverse direction, wherein the outer surfaces of three groups of heating plates are fixedly connected to brackets, the outer surfaces of the three groups of brackets are rotatably connected to support bars, and the body of one group of support bars is provided with a clamping groove. The invention relates to the technical field of composite material manufacturing, and solves the problems that, when using the existing hot bending forming method for composite material PMI foam for processing, on the one hand, the stability of the mold supporting the plate is insufficient, and on the other hand, when vacuuming, the rubber mold has different shrinkage efficiencies, which easily leads to dislocation of the plate, thereby reducing the processing accuracy and quality of the plate.

Description

Technical Field

[0001] The invention relates to the technical field of composite material manufacturing, in particular to a hot bending forming device for composite material PMI foam. Background Art

[0002] At present, curved components made of polymethacrylimide (PMI) foam composite materials are mainly manufactured by CNC machining or block splicing, which not only has high manufacturing costs and low material utilization, but also has problems such as easy cracking, surface slagging, and difficult processing of thin-walled parts. If block splicing is adopted, obvious splicing seams will appear inside the composite material, affecting the quality and overall strength of the parts and reducing the use advantages of PMI foam. In a hot bending forming method of an aviation sandwich composite material PMI foam with application number CN202011076057.1, the method comprises the following steps: (1) making a forming platform and a mold; when the PMI foam board is heated to the softening point, the rubber film is fitted with the PMI foam board and the mold through a vacuum system to achieve the overall forming of the multi-curved PMI foam.

[0003] Although this process has the above advantages, it still has the following defects in actual processing:

[0004] 1) The mold size used in this process is fixed, which limits the processing range. At the same time, the top surface is small, resulting in insufficient stability when supporting the plate, which easily leads to processing errors;

[0005] 2) This process bends the sheet by vacuum extrusion. Due to the poor support performance of the mold and the different shrinkage rates of the rubber mold during vacuuming, the extrusion bending effect is poor and it is easy to cause the sheet to be misaligned, resulting in reduced processing accuracy and quality.

[0006] Therefore, it is necessary to solve the problems that still exist in the above-mentioned device. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a hot bending forming device for composite material PMI foam, which solves the problems that when the existing hot bending forming method of composite material PMI foam is used for processing, on the one hand, the stability of the mold supporting the plate is insufficient; on the other hand, when vacuuming, the rubber mold has different shrinkage efficiencies, which easily leads to dislocation of the plate, thereby reducing the processing accuracy and quality of the plate.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hot bending forming device for a composite material PMI foam, comprising a base, a hot bending mechanism is arranged on the outside of the base, the hot bending mechanism comprises a tough plate, a fixed frame is arranged on the outside of the tough plate, the outer surface of the fixed frame is fixedly connected to the outer surface of the base, the outer surface of the tough plate is fixedly connected to a heating plate, and multiple groups of heating plates are arranged at equal distances laterally, wherein the outer surfaces of three groups of heating plates are fixedly connected to brackets, the outer surfaces of the three groups of brackets are rotatably connected to support bars, the body of one group of support bars is provided with a clamping groove, the inside of the clamping groove is movably connected to a support rod, both ends of the support rod are fixedly connected to the outer surface of the fixed frame, the outer surfaces of the support rods are respectively slidably connected to the bodies of the other two groups of support bars, the outer surface of one group of support bars is fixedly connected to a push-pull rod, and the outer surface of the push-pull rod is fixedly connected to the outer surface of the fixed frame.

[0009] Preferably, a screw rod is rotatably connected inside the clamping groove, and the outer surface of the screw rod is respectively threadedly connected to the main bodies of the other two groups of support bars, and both ends of the screw rod are rotatably connected to the main body of the fixed frame. One end of the screw rod is fixedly connected to a reciprocating motor through a coupling, and the reciprocating motor is fixedly mounted on the outer surface of the fixed frame.

[0010] Preferably, a retaining assembly is provided on the outside of the flexible plate, and the retaining assembly includes two groups of telescopic rods, and the two groups of telescopic rods are provided on the outside of the flexible plate, and the output ends of the two groups of telescopic rods are fixedly connected to spring rods, and the output ends of the two groups of spring rods are rotatably connected to connecting frames, and the outer surfaces of the two groups of connecting frames are fixedly connected to suction devices.

[0011] Preferably, a slide is fixedly connected to the outer surface of the telescopic rod, a lifting rod is fixedly connected to the outer surface of the slide, a folding plate is fixedly connected to the outer surface of the lifting rod, and the outer surface of the folding plate is fixedly connected to the outer surface of the base.

[0012] Preferably, a rolling unit is arranged outside the suction device, and the rolling unit comprises a rotating frame, which is arranged between the outer surfaces of the two groups of suction devices, and the outer surface of the rotating frame is rotatably connected to a roller, and the outer surface of the roller is covered with a rubber sleeve.

[0013] Preferably, a solid bar is provided on the outside of the rotating frame, the outer surface of the solid bar is fixedly connected to the outer surface of the slide, the outer surface of the solid bar is slidably connected to a connecting block, the outer surface of the connecting block is fixedly connected to a rotating cylinder, and the output end of the rotating cylinder is fixedly connected to an extrusion rod.

[0014] Preferably, a pressure-maintaining module is provided on the outside of the rotating frame, and the pressure-maintaining module includes a slide plate, the outer surface of the slide plate is fixedly connected to the output end of the extrusion rod, and a pin rod is slidably connected through the body of the slide plate, one end of the pin rod is fixedly connected to the outer surface of the rotating frame, and a compression spring is sleeved on the outer surface of the pin rod, and one end of the compression spring is fixedly connected to the outer surface of the slide plate.

[0015] Preferably, the other end of the compression spring is movably connected to a push plate, the body of the push plate is slidably connected to the outer surface of the pin rod, the outer surface of the push plate is fixedly connected to a nut, and the screw hole of the nut is threadedly connected to the outer surface of the pin rod.

[0016] Preferably, a positioning component is provided on the outside of the flexible plate, and the positioning component includes a sliding frame, and the inside of the sliding frame is movably connected to two push plates, and the outside of the sliding frame is provided with a sliding bar, and the outer surface of the sliding bar is fixedly connected to the outer surface of the folding plate, and the outer surface of the sliding bar is slidably connected to a sliding block, and the outer surface of the sliding block is fixedly connected to the outer surface of the sliding frame.

[0017] Preferably, the outer surface of the push plate is fixedly connected to a clamping frame, the outer surface of the clamping frame is slidably connected to the outer surface of the slide frame, the outer surface of the push plate is fixedly connected to a permanent magnet, the permanent magnet is movably connected to an electromagnet through magnetic force, the outer surface of the electromagnet is fixedly connected to the inside of the slide frame, and the outer surface of the push plate is fixedly connected to a rangefinder.

[0018] Beneficial Effects

[0019] The present invention provides a hot bending forming device for composite material PMI foam. Compared with the prior art, it has the following beneficial effects:

[0020] (1) By setting up a hot bending mechanism and utilizing the deformation of the flexible plate, the support stability can be improved through the flat state, and the heating effect on the plate can be improved. At the same time, the movement of the three groups of support bars can be used to bend the flexible plate. On the one hand, the plate can be hot bent by bending, and on the other hand, different curvatures can be provided to increase the processing range.

[0021] (2) By setting up a holding component, two sets of grippers can be used to adsorb and fix the ends of the plate, and the grippers on both sides move synchronously and in the same amount, which can continuously maintain the stability of the plate and avoid the problem of misalignment of the plate during processing, which may lead to processing errors.

[0022] (3) By setting up a rolling unit, the connecting block is used to drive the rotating frame and the roller to move. The roller can roll the plate through the rubber sleeve to make it fit the tough plate to achieve hot bending operation. At the same time, the rotating cylinder is used to adjust the direction, and the extrusion rod is extended and retracted to adjust the position, so that the rolling force is directly against the curved surface, so as to further improve the rolling effect.

[0023] (4) By setting up a pressure-maintaining module, when the roller is rolling the plate, the slide plate is used to compress the compression spring, and the compression spring rebounds to push the rotating frame, so that the roller applies pressure to the plate, and the pressure is maintained by the elastic force of the compression spring, avoiding the problem of excessive pressure force causing damage to the plate.

[0024] (5) By setting up a positioning component and utilizing the combination of a sliding frame and a sliding block, the plate can be supported and transported. At the same time, the push plates on both sides can move synchronously, and the push plates can abut against the plate to make the plate move and be in a suitable position, thereby achieving a positioning effect, so as to improve the accuracy and effect of plate processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional diagram of the external structure of the present invention;

[0026] Figure 2 The figure is a three-dimensional diagram of the external structure of the tough board of the present invention;

[0027] Figure 3 A three-dimensional diagram of the internal structure of the slide frame of the present invention;

[0028] Figure 4 It is a three-dimensional diagram of the external structure of the suction device of the present invention;

[0029] Figure 5 The figure is a three-dimensional diagram of the external structure of the rotating roller of the present invention;

[0030] Figure 6 It is a three-dimensional diagram of the external structure of the skateboard of the present invention.

[0031] In the figure: 1, base; 2, flexible plate; 3, holding assembly; 31, telescopic rod; 32, spring rod; 33, connecting frame; 34, suction device; 35, rolling unit; 351, rotating frame; 352, pressure-maintaining module; 3521, slide plate; 3522, pin rod; 3523, compression spring; 3524, stop plate; 3525, nut; 353, rotating roller; 354, rubber sleeve; 355, fixing strip; 356, connecting block; 357, Rotating cylinder; 358, extrusion rod; 36, slide; 37, lifting rod; 38, folding plate; 4, positioning assembly; 41, slide frame; 42, push plate; 43, slide bar; 44, slider; 45, clamping frame; 46, permanent magnet; 47, electromagnet; 48, rangefinder; 5, fixed frame; 6, heating plate; 7, bracket; 8, support bar; 9, clamping groove; 10, support rod; 11, push-pull rod; 12, screw rod; 13, reciprocating motor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-6 The present invention provides a technical solution: a hot bending forming device for composite material PMI foam:

[0034] Embodiment 1: Refer to the attached manual Figure 1 , Attachment Figure 2 ; It includes a base 1, and a hot bending mechanism is arranged on the outside of the base 1. The hot bending mechanism includes a tough plate 2. The tough plate 2 is made of a material that is resistant to high temperature corrosion, has good heat transfer performance, good toughness and fatigue resistance. A fixed frame 5 is arranged on the outside of the tough plate 2. The outer surface of the fixed frame 5 is fixedly connected to the outer surface of the base 1. A heating plate 6 is fixedly connected to the outer surface of the tough plate 2. The heating plate 6 is made of a material that is tough, fatigue-resistant and conductive. Heat is generated by power supply and high resistance. Multiple groups of heating plates 6 are arranged at equal distances laterally, and the outer surfaces of three groups of heating plates 6 are fixedly connected to brackets 7. The outer surfaces of the three groups of brackets 7 are rotatably connected to support bars 8. The three groups of support bars 8 are respectively located on both sides and in the middle of the bottom of the tough plate 2, and the support bars 8 rotate around the brackets 7. The position of the tough plate is changed by movement. 2 is bent. As a preferred method, the tough plate 2 can be made of a circular plate, and the outer support bars 8 are arranged in multiple groups at equal angles around the axis of the circular plate, so that the circular plate can be bent into a spherical arc surface, so as to heat bend the plate into a spherical arc shape, thereby improving the processing range. A body of one group of support bars 8 is provided with a clamping groove 9, and a support rod 10 is movably connected inside the clamping groove 9. The support rod 10 plays a role of limiting and guiding movement. Both ends of the support rod 10 are fixedly connected to the outer surface of the fixed frame 5. The outer surfaces of the support rod 10 are respectively connected to the bodies of the other two groups of support bars 8 through sliding. The outer surface of one group of support bars 8 is fixedly connected to a push-pull rod 11. The push-pull rod 11 is made of an existing electric push rod and is electrically connected to an external control circuit. The outer surface of the push-pull rod 11 is fixedly connected to the outer surface of the fixed frame 5.

[0035] A screw rod 12 is rotatably connected inside the clamping groove 9, and the threads on both sides of the surface of the screw rod 12 are arranged in opposite directions so as to drive the two outer groups of support bars 8 to move synchronously in opposite directions, so that the movement amount of the two groups of support bars 8 is consistent, so that the tough plate is bent twice into a symmetrical arc. The outer surface of the screw rod 12 is respectively threadedly connected to the bodies of the other two groups of support bars 8, and both ends of the screw rod 12 are rotatably connected to the body of the fixed frame 5. One end of the screw rod 12 is fixedly connected to a reciprocating motor 13 through a coupling. The reciprocating motor 13 is made of a servo motor and is electrically connected to an external control circuit. The reciprocating motor 13 is fixedly mounted on the outer surface of the fixed frame 5.

[0036] By setting up a hot bending mechanism and utilizing the deformation of the flexible plate 2, the support stability can be improved through the flat state, and the heating effect on the plate can be improved. At the same time, the movement of the three groups of support bars 8 can be used to bend the flexible plate 2. On the one hand, the plate can be hot bent by bending, and on the other hand, different curvatures can be provided to increase the processing range.

[0037] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 1 , Attachment Figure 4 A holding assembly 3 is provided on the outside of the flexible plate 2, and the holding assembly 3 includes two groups of telescopic rods 31. The telescopic rods 31 are made of existing electric push rods and are electrically connected to the external control circuit. The two groups of telescopic rods 31 are both arranged on the outside of the flexible plate 2. The output ends of the two groups of telescopic rods 31 are fixedly connected with spring rods 32. The output ends of the spring rods 32 can facilitate the suction device 34 to adapt to the deformation and position change of the side of the flexible plate 2 through extension and retraction. The output ends of the two groups of spring rods 32 are rotatably connected with a connecting frame 33. The rotation function of the connecting frame 33 facilitates the suction device 34 to change its direction so as to adapt to the change of the direction of both sides of the flexible plate 2. The outer surfaces of the two groups of connecting frames 33 are fixedly connected with suction devices 34. The suction devices 34 are made of electric suction cups with model P612C and are electrically connected to the external control circuit.

[0038] The outer surface of the telescopic rod 31 is fixedly connected with a slide 36, and the outer surface of the slide 36 is fixedly connected with a lifting rod 37. The lifting rod 37 is made of an existing electric push rod and is electrically connected to an external control circuit. The outer surface of the lifting rod 37 is fixedly connected with a folding plate 38, and the outer surface of the folding plate 38 is fixedly connected to the outer surface of the base 1.

[0039] By setting up the retaining component 3, the two sets of suction devices 34 can be used to adsorb and fix the end sides of the plate, and the suction devices 34 on both sides move synchronously and in the same amount, so as to continuously maintain the stability of the plate, avoid the problem of misalignment of the plate during processing, which may lead to processing errors of the plate.

[0040] Embodiment 3: Based on Embodiment 2, refer to the attached Figure 1 , Attachment Figure 5A rolling unit 35 is arranged outside the suction device 34, and the rolling unit 35 includes a rotating frame 351, which is arranged between the outer surfaces of the two groups of suction devices 34. The outer surface of the rotating frame 351 is rotatably connected with a roller 353. The outer diameter of the roller 353 is set larger to provide a larger contact surface. The outer surface of the roller 353 is provided with a rubber sleeve 354, which is made of high-temperature resistant rubber. The rubber material is used for buffering to avoid damage to the plate during hot pressing.

[0041] A fixed strip 355 is arranged on the outside of the rotating frame 351. The fixed strip 355 is made of the existing slide rail. The outer surface of the fixed strip 355 is fixedly connected to the outer surface of the slide frame 36. The outer surface of the fixed strip 355 is slidably connected with a connecting block 356. The connecting block 356 is made of the existing linear motor with a self-locking function and is electrically connected to an external control circuit. The outer surface of the connecting block 356 is fixedly connected with a rotating cylinder 357. The rotating cylinder 357 is electrically connected to the external control circuit. The pressure direction of the roller 353 can be changed by rotation so that the pressure direction is directly facing the curved surface to improve the effect of hot bending processing. The output end of the rotating cylinder 357 is fixedly connected with an extrusion rod 358. The extrusion rod 358 is made of the existing electric push rod and is electrically connected to the external control circuit.

[0042] By setting up a rolling unit 35, the connecting block 356 is used to drive the rotating frame 351 and the roller 353 to move. The roller 353 can roll the plate through the rubber sleeve 354 to make it fit the tough plate 2 to achieve hot bending operation. At the same time, the rotating cylinder 357 is used to adjust the direction, and the extrusion rod 358 is extended and retracted to adjust the position, so that the rolling force is directly against the curved surface, so as to further improve the rolling effect.

[0043] Embodiment 4: Based on Embodiment 3, refer to the attached Figure 5 , Attachment Figure 6 A pressure-maintaining module 352 is provided on the outside of the rotating frame 351, and the pressure-maintaining module 352 includes a slide plate 3521. As a preferred method, the slide plate 3521 can be fixedly connected to the output end of the extrusion rod 358 through a driving motor, so as to change the movement direction of the roller 353 by rotation, so as to facilitate the hot bending of the plate into a spherical arc shape. The outer surface of the slide plate 3521 is fixedly connected to the output end of the extrusion rod 358, and the body of the slide plate 3521 is slidably connected with a pin rod 3522, which plays a role of limiting and guiding movement. One end of the pin rod 3522 is fixedly connected to the outer surface of the rotating frame 351, and the outer surface of the pin rod 3522 is sleeved with a compression spring 3523, which is made of pressure-resistant and fatigue-resistant materials, and one end of the compression spring 3523 is fixedly connected to the outer surface of the slide plate 3521.

[0044] The other end of the compression spring 3523 is movably connected to a push plate 3524, which can abut against the compression spring 3523 by moving, so that the elastic force of the compression spring 3523 is maintained after fatigue. The body of the push plate 3524 is slidably connected to the outer surface of the pin rod 3522, and the outer surface of the push plate 3524 is fixedly connected to a nut 3525, which can drive the push plate 3524 to move and limit the push plate 3524, and the screw hole of the nut 3525 is threadedly connected to the outer surface of the pin rod 3522.

[0045] By setting up the pressure-maintaining module 352, when the roller 353 rolls the plate, the slide plate 3521 is used to compress the compression spring 3523, and the compression spring 3523 rebounds and pushes the rotating frame 351, so that the roller 353 applies pressure to the plate, and the pressure is maintained by the elastic force of the compression spring 3523, avoiding the problem of excessive pressure force causing damage to the plate.

[0046] Embodiment 5: Based on Embodiment 4, refer to the attached Figure 1 , Attachment Figure 2 A positioning assembly 4 is provided on the outside of the flexible plate 2, and the positioning assembly 4 includes a slide frame 41. The width of the slide frame 41 is adapted to the width of the plate, and the length is greater than the length of the plate, so as to adjust the position of the plate. The slide frame 41 is internally movably connected with two push plates 42, and the push plates 42 can push the plate to move by movement to achieve the positioning of the plate. A slide bar 43 is provided on the outside of the slide frame 41. The slide bar 43 is made of an existing slide rail. The outer surface of the slide bar 43 is fixedly connected to the outer surface of the folding plate 38. The outer surface of the slide bar 43 is slidably connected with a slider 44. The slider 44 is made of an existing linear motor with a self-locking function and is electrically connected to an external control circuit. The outer surface of the slider 44 is fixedly connected to the outer surface of the slide frame 41.

[0047] The outer surface of the push plate 42 is fixedly connected with a clamping frame 45, and the clamping frame 45 is fitted with the sliding frame 41 to guide and limit the movement of the push plate 42, thereby improving the stability of the movement of the push plate 42. The outer surface of the clamping frame 45 is slidably connected to the outer surface of the sliding frame 41. The outer surface of the push plate 42 is fixedly connected with a permanent magnet 46, and the permanent magnet 46 is connected to an electromagnet 47 through magnetic activity. The electromagnet 47 is electrically connected to an external control circuit. The outer surface of the electromagnet 47 is fixedly connected to the inside of the sliding frame 41. The outer surface of the push plate 42 is fixedly connected with a rangefinder 48, which is made of a displacement sensor with model CD33-85P and is electrically connected to the external control circuit. The position of the push plate 42 is monitored to position the plate and to facilitate the control of the movement of the suction device 34.

[0048] By setting up the positioning component 4 and utilizing the combination of the slide frame 41 and the slider 44, the plate can be supported and transported. At the same time, the push plates 42 on both sides can move synchronously, and the push plates 42 can abut against the plate to make the plate move and be in a suitable position, thereby realizing the positioning effect, so as to improve the accuracy and effect of plate processing.

[0049] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0050] During operation, first, the plate to be processed is placed inside the slide frame 41. Then, according to the shape to be processed and the size of the plate, the electromagnet 47 is energized to generate magnetism. Through the repulsion and attraction between the electromagnet 47 and the permanent magnet 46, the push plate 42 slides inside the slide frame 41, and the plate is pushed to move by abutting against the plate, thereby completing the positioning of the plate. Then, the slider 44 moves along the slide bar 43, so that the slide frame 41 drives the plate to move between the suction fixture 34 and the tough plate 2. Then, the lifting rod 37 drives the connecting frame 33 to descend, so that the suction fixture 34 fits with both sides of the plate and picks up the plate by adsorption. Then, the slide The frame 41 is reset, and the suction device 34 drives the plate to fit on the flexible plate 2. Then the heating plate 6 is powered on to heat up and heats the plate through the flexible plate 2. When the plate is heated to the softening point, the output end of the push-pull rod 11 extends to drive the middle support bar 8 to rise and lift the center of the flexible plate 2. At the same time, the reciprocating motor 13 drives the screw rod 12 to move, so that the support bars 8 on both sides are close to each other to adapt to the movement of the middle support bar 8, so that the flexible plate 2 is bent as a whole. At the same time, when the flexible plate 2 is deformed, on the one hand, the bending degree is adjusted by the size of the movement of the support bar 8, and on the other hand, the plate is deformed synchronously. In the process of bending the plate, the telescopic rod 31 outputs The end of the extrusion rod 358 extends synchronously, so that the position of the suction device 34 changes to adapt to the deformation of the plate, and then the output end of the extrusion rod 358 extends, so that the rotating frame 351 drives the roller 353 and the rubber sleeve 354 to fit the plate, and at the same time, the output end of the extrusion rod 358 pushes the slide plate 3521 to slide again to compress the compression spring 3523, so that the roller 353 applies pressure to the softened plate through the resilience of the compression spring 3523, and then the connecting block 356 slides along the fixed strip 355, so that the roller 353 follows the movement, so as to roll the plate to make it completely fit the tough plate 2, and at the same time, the roller 353 follows the connecting block 3 When 56 moves, the output end of the rotating cylinder 357 rotates, and the output end of the extrusion rod 358 is adaptively extended and retracted, so that the pressure direction of the rotating roller 353 is directly opposite to the curved surface of the flexible plate 2 after bending, so as to further improve the bending effect of the plate, and the plate is gradually processed from the center to both sides during the rolling process, and when the middle part is bent, there is a certain abutment and limiting effect between the plate and the flexible plate 2, and then the suction device 34 is separated from the adsorption of both sides of the plate, and the suction device 34 is reset through the rebound of the spring rod 32, and then the rotating roller 353 rolls the edge position of the plate again to make the plate completely bent.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot bending forming device for composite material PMI foam, comprising a base (1), characterized in that: The base (1) is provided with a heat bending mechanism on the outside, the heat bending mechanism comprises a flexible plate (2), a fixed frame (5) is provided on the outside of the flexible plate (2), the outer surface of the fixed frame (5) is fixedly connected to the outer surface of the base (1), the outer surface of the flexible plate (2) is fixedly connected to a heating plate (6), a plurality of groups of heating plates (6) are arranged at equal distances in the transverse direction, wherein the outer surfaces of three groups of heating plates (6) are fixedly connected to brackets (7), the outer surfaces of the three groups of brackets (7) are rotatably connected to support bars (8), a body of one group of support bars (8) is provided with a clamping groove (9), the inside of the clamping groove (9) is movably connected to a support rod (10), both ends of the support rod (10) are fixedly connected to the outer surface of the fixed frame (5), the outer surfaces of the support rod (10) are respectively slidably connected to the bodies of the other two groups of support bars (8), the outer surface of one group of support bars (8) is fixedly connected to a push-pull rod (11), the outer surface of the push-pull rod (11) is fixedly connected to the outer surface of the fixed frame (5); A holding assembly (3) is arranged outside the flexible plate (2), and the holding assembly (3) comprises two groups of telescopic rods (31). The two groups of telescopic rods (31) are arranged outside the flexible plate (2), the output ends of the two groups of telescopic rods (31) are fixedly connected to spring rods (32), the output ends of the two groups of spring rods (32) are rotatably connected to connecting frames (33), and the outer surfaces of the two groups of connecting frames (33) are fixedly connected to suction devices (34); A rolling unit (35) is arranged outside the suction device (34), and the rolling unit (35) comprises a rotating frame (351). The rotating frame (351) is arranged between the outer surfaces of the two groups of suction devices (34). The outer surface of the rotating frame (351) is rotatably connected to a roller (353), and the outer surface of the roller (353) is sleeved with a rubber sleeve (354). A fixing strip (355) is arranged outside the rotating frame (351), and the outer surface of the fixing strip (355) is fixedly connected to the outer surface of the slide (36). The outer surface of the fixing strip (355) is slidably connected to a connecting block (356), and the outer surface of the connecting block (356) is fixedly connected to a rotating cylinder (357), and the output end of the rotating cylinder (357) is fixedly connected to an extrusion rod (358).

2. The hot bending forming device of a composite material PMI foam according to claim 1, characterized in that: A screw rod (12) is rotatably connected inside the clamping groove (9), and the outer surfaces of the screw rod (12) are respectively threadedly connected to the bodies of the other two groups of support bars (8), and both ends of the screw rod (12) are rotatably connected to the body of the fixed frame (5), and one end of the screw rod (12) is fixedly connected to a reciprocating motor (13) via a coupling, and the reciprocating motor (13) is fixedly mounted on the outer surface of the fixed frame (5).

3. The hot bending forming device of a composite material PMI foam according to claim 1, characterized in that: The outer surface of the telescopic rod (31) is penetrated and fixedly connected with a slide frame (36), the outer surface of the slide frame (36) is fixedly connected with a lifting rod (37), the outer surface of the lifting rod (37) is fixedly connected with a folding plate (38), and the outer surface of the folding plate (38) is fixedly connected to the outer surface of the base (1).

4. The hot bending forming device of a composite material PMI foam according to claim 1, characterized in that: A pressure-maintaining module (352) is arranged outside the rotating frame (351), and the pressure-maintaining module (352) comprises a slide plate (3521), the outer surface of the slide plate (3521) is fixedly connected to the output end of the extrusion rod (358), a pin rod (3522) is slidably connected through the body of the slide plate (3521), one end of the pin rod (3522) is fixedly connected to the outer surface of the rotating frame (351), and a compression spring (3523) is sleeved on the outer surface of the pin rod (3522), and one end of the compression spring (3523) is fixedly connected to the outer surface of the slide plate (3521).

5. The hot bending forming device of a composite material PMI foam according to claim 4, characterized in that: The other end of the compression spring (3523) is movably connected to a support plate (3524), a body of the support plate (3524) is slidably connected to the outer surface of the pin rod (3522), a nut (3525) is fixedly connected to the outer surface of the support plate (3524), and a screw hole of the nut (3525) is threadedly connected to the outer surface of the pin rod (3522).

6. The hot bending forming device of a composite material PMI foam according to claim 3, characterized in that: A positioning assembly (4) is arranged outside the flexible plate (2), and the positioning assembly (4) comprises a sliding frame (41), and two push plates (42) are movably connected inside the sliding frame (41), and a sliding bar (43) is arranged outside the sliding frame (41), and the outer surface of the sliding bar (43) is fixedly connected to the outer surface of the folding plate (38), and the outer surface of the sliding bar (43) is slidably connected to a sliding block (44), and the outer surface of the sliding block (44) is fixedly connected to the outer surface of the sliding frame (41).

7. The hot bending forming device of a composite material PMI foam according to claim 6, characterized in that: The outer surface of the push plate (42) is fixedly connected to a clamping frame (45), the outer surface of the clamping frame (45) is slidably connected to the outer surface of the sliding frame (41), the outer surface of the push plate (42) is fixedly connected to a permanent magnet (46), the permanent magnet (46) is movably connected to an electromagnet (47) through magnetic force, the outer surface of the electromagnet (47) is fixedly connected to the inside of the sliding frame (41), and the outer surface of the push plate (42) is fixedly connected to a distance meter (48).

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