Semi-hexagonal sheet forming machine and forming process

Abstract

The invention discloses a semi-hexagonal sheet forming machine and a forming process. The forming machine comprises a lower die, a pre-forming rolling mechanism, a material pressing mechanism, a material clamping mechanism, an upper die and a hot press. A semi-hexagonal groove is formed in the upper surface of the lower die; a rolling roller is arranged on the pre-forming rolling mechanism, and semi-hexagonal teeth matched with the semi-hexagonal grooves are arranged on the surface of the rolling roller; the material pressing mechanism is used for pressing one side edge of the material sheet on the side part of the lower die; the material clamping mechanism is used for clamping the other side edge of the material sheet and feeding materials to the direction of the material pressing mechanism in the rolling forming process; the upper die is arranged on the top of a hot pressing bin of the hot press in a liftable mode, and semi-hexagonal protruding edges are arranged on the lower surface. And the hot press is used for performing hot press molding on the preformed material sheet clamped between the two molds. The semi-hexagonal carbon fiber material profile plates are prepared in batches, and then the carbon fiber honeycomb block with the specific specification is produced through the subsequent gluing and bonding process, so that the problems that an existing preparation method is complex in process and tedious in process are solved.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber honeycomb core material manufacturing, and in particular to a semi-hexagonal sheet forming machine and a forming process. Background Art

[0002] Carbon fiber honeycomb core materials have the characteristics of low density, high strength, high specific strength, high specific stiffness, strong energy absorption performance, good buffering effect, efficient heat dissipation, uniform temperature distribution, corrosion resistance, strong fatigue resistance, long life, strong plasticity, recyclability, and low emissions. They are widely used in aerospace, automobile, sports equipment and other fields.

[0003] In the prior art, the manufacturing method of carbon fiber honeycomb core material is usually to first use a mold to make a single hexagonal tube, and then bond the hexagonal tubes together to form a honeycomb structure. This method is too complicated and requires a large number of hexagonal tubular material molds. The subsequent demolding is inconvenient, and the quality of the single hexagonal tubes is uneven. The forming and bonding workload is very large, requiring a lot of manpower, and the subsequent demolding is time-consuming and laborious. Summary of the invention

[0004] To this end, the present invention provides a semi-hexagonal sheet forming machine and a forming process for preparing semi-hexagonal carbon fiber material profile plates; by first batch preparing semi-hexagonal carbon fiber material profile plates, and then producing carbon fiber honeycomb blocks of specific specifications through a subsequent gluing and bonding process, the problems of complex process and cumbersome process of the existing preparation method are solved.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The first aspect of the present invention provides a semi-hexagonal sheet forming machine, comprising a lower mold, a preforming rolling mechanism, a material pressing mechanism, a material clamping mechanism, an upper mold and a hot press;

[0007] The upper surface of the lower mold is provided with a plurality of semi-hexagonal grooves extending in the front-to-back direction, and the spacing between adjacent semi-hexagonal grooves is the groove bottom width of the semi-hexagonal grooves;

[0008] The preforming rolling mechanism is provided with a rolling roller, the surface of which is provided with semi-hexagonal teeth matching the semi-hexagonal grooves, and the rolling roller can roll in the left and right directions to roll the sheet laid on the lower mold;

[0009] The pressing mechanism is used to press one side of the blank against the side of the lower mold;

[0010] The clamping mechanism and the pressing mechanism are symmetrically distributed relative to the lower mold, and the clamping mechanism is used to clamp the other side of the sheet and feed the sheet toward the pressing mechanism during the rolling forming process;

[0011] The upper mold is arranged on the top of the hot pressing chamber of the hot pressing machine in a liftable manner, and the lower surface is provided with semi-hexagonal convex ridges matching the semi-hexagonal grooves;

[0012] The hot press machine is used to close two molds and hot-press the preform sheet sandwiched between the two molds.

[0013] Further, the semi-hexagonal sheet forming machine also includes a main frame, a lower die main moving mechanism, a lower die in and out press mechanism and a control unit;

[0014] The main frame is arranged along the front-rear direction;

[0015] The lower mold main moving mechanism is arranged on the main frame, a main positioning convex block which can be raised and lowered is arranged on the lower mold main moving mechanism, a main positioning groove which is matched with the main positioning convex block is arranged below the lower mold, and the lower mold main moving mechanism is used to move the lower mold along the main frame;

[0016] The lower die in-and-out press mechanism is arranged on the main frame, and a lifting arm that can be lifted and lowered is arranged on the lower die in-and-out press mechanism, and an insert block arranged toward the end of the lifting arm is arranged, and a slot matched with the insert block is arranged on the rear side edge of the upper surface of the lower die, and the lower die in-and-out press mechanism is used to move the lower die into the hot pressing chamber, and make the lower die be located directly below the upper die;

[0017] The control unit is respectively connected with the preforming rolling mechanism, the pressing mechanism, the clamping mechanism, the lower die main moving mechanism, the lower die in and out of the press mechanism, and the hot press machine electronic control.

[0018] Furthermore, the semi-hexagonal sheet forming machine also includes a preheating mechanism, a material pressing and moving mechanism, and a material clamping and moving mechanism;

[0019] The preheating mechanism is arranged in one end of the main frame away from the hot press, and a liftable preheating plate is arranged on the preheating mechanism, and the preheating plate is used to preheat the lower mold;

[0020] The pressing mechanism is arranged on the main frame, and a pressing plate which can be moved laterally is arranged on the pressing mechanism, and is used for abutting against the side edge of the lower mold to press one side edge of the sheet;

[0021] The pressing moving mechanism is arranged on the main frame, and is used to make the pressing mechanism move synchronously with the lower mold to the preforming station, and to make the pressing mechanism return to the preheating station.

[0022] The clamping mechanism is arranged on the main frame, and a feeding mechanism which can move laterally and a clamping plate mechanism arranged on the feeding mechanism are arranged on the clamping mechanism, the clamping plate mechanism is used to clamp the other side of the sheet, and the feeding mechanism is used to feed the sheet at a uniform speed;

[0023] The material clamping moving mechanism is arranged on the main frame, and is used to make the material clamping mechanism move synchronously with the lower mold to the preforming station, and to make the material clamping mechanism return to the preheating station;

[0024] The control unit is electrically connected to the preheating mechanism, the material pressing and moving mechanism and the material clamping and moving mechanism respectively.

[0025] Furthermore, the semi-hexagonal sheet forming machine also includes a sub-frame, a lower die transfer mechanism and a cooling mechanism;

[0026] The auxiliary frame is arranged on the middle side of the main frame along the left-right direction;

[0027] The lower mold transfer mechanism is arranged inside the intersection of the main frame and the auxiliary frame, and the lower mold transfer mechanism is provided with a liftable transfer frame, a transfer transverse movement mechanism arranged on the transfer frame and movable in the left and right directions, and a liftable transfer positioning protrusion arranged on the transfer transverse movement mechanism. The lower surface of the lower mold is provided with a transfer positioning groove adapted to the transfer positioning protrusion, and the lower mold transfer mechanism is used to replace the lower mold between the main frame and the auxiliary frame;

[0028] The cooling mechanism is arranged inside the end of the auxiliary frame away from the main frame, and a cooling plate which can be raised and lowered is arranged on the cooling mechanism;

[0029] The lower die auxiliary moving mechanism is arranged on the auxiliary frame, the lower die auxiliary moving mechanism is provided with an auxiliary positioning convex block which can be raised and lowered, and an auxiliary positioning groove which is matched with the auxiliary positioning convex block is arranged below the lower die, and the lower die moving mechanism is used to move the lower die along the auxiliary frame;

[0030] The control unit is electrically controlled and connected with the lower die transfer mechanism, the cooling mechanism and the lower die pair moving mechanism respectively.

[0031] Furthermore, the pre-forming rolling mechanism is provided with a rolling transverse movement mechanism that can move in the left and right directions, a liftable pressurizing mechanism arranged below the rolling transverse movement mechanism, and an axle seat mechanism arranged below the pressurizing mechanism. A rotating shaft that rotates synchronously with the rolling roller is provided at the end of the rolling roller, and the shaft end of the rotating shaft can be rotatably installed in the axle seat mechanism.

[0032] Furthermore, a liftable anti-rotation lock is provided below the rolling transverse movement mechanism, and the rotating shaft is provided with an anti-rotation structure used in conjunction with the anti-rotation lock. When the anti-rotation lock cooperates with the anti-rotation structure, a semi-hexagonal tooth is located exactly below the rolling roller to correspond to the semi-hexagonal groove.

[0033] Further, the bottom and the bottom of the hot pressing chamber are respectively provided with heating plates, the upper mold is installed on the lower side of the top heating plate, and two lower mold positioning blocks are provided on the bottom heating plate, the lower mold positioning blocks include a horizontal edge arranged along the left-right direction and a longitudinal edge along the front-back direction, and the two lower mold positioning blocks are arranged symmetrically on the left and right sides, and the horizontal edge is arranged on the inner side of the front end of the longitudinal edge, wherein the inner side of the longitudinal edge is provided with an inclined surface offset outward from the front to the back;

[0034] Positioning holes are arranged on the left and right sides of the lower mold, and conical positioning pins movable in the left and right directions are arranged in the hot pressing chamber, and the conical positioning pins are correspondingly distributed on the left and right sides of the lower mold.

[0035] The second aspect of the present invention provides a semi-hexagonal sheet forming process, which uses the semi-hexagonal sheet forming machine provided by the first aspect of the present invention, and comprises the following steps:

[0036] Laying the sheet on the lower mold;

[0037] The material sheet is fixed by using a material pressing mechanism and a material clamping mechanism;

[0038] The preforming roller mechanism is used for roll forming; the semi-hexagonal teeth directly below are embedded in the first semi-hexagonal groove of the lower mold close to the material pressing mechanism, and the rolling roller moves toward the side where the clamping mechanism is located. During the movement, the rolling roller is passively rotated;

[0039] The clamping mechanism feeds the material to the side where the pressing mechanism is located, so that the rolling and feeding are kept in a balanced state, avoiding excessive stretching of the sheet during the rolling forming process;

[0040] After rolling is completed, the preform sheet is transferred to the hot press chamber along with the lower mold;

[0041] The upper mold is pressed down to close the mold with the lower mold, clamping the preform sheet between the two molds;

[0042] After hot pressing in the hot pressing chamber for a certain period of time, the upper mold moves up, the chamber is opened, and the hot-pressed semi-hexagonal sheet is taken out together with the lower mold;

[0043] Demould after cooling down.

[0044] Furthermore, each step of the molding process is automatically completed under the control of the control unit, including:

[0045] Control the temperature in the hot pressing chamber to rise to a predetermined hot pressing temperature, and control the temperature of the preheating plate to rise to a predetermined preheating temperature;

[0046] The lower mold main moving mechanism moves the lower mold on the main frame to the preheating station of the main frame; the main positioning convex block descends and separates from the lower mold on the preheating station; the lower mold main moving mechanism moves away from the preheating station;

[0047] The preheating plate rises and contacts the lower mold on the preheating station of the main frame to preheat the lower mold on the preheating station; after the preheating is completed, the preheating plate descends;

[0048] The main moving mechanism of the lower mold moves to the preheating station, and the main positioning protrusion rises and extends into the main positioning groove;

[0049] The pressing plate extends out to press one side of the sheet against the side of the lower mold on the preheating station; the clamping plate mechanism clamps the other side of the sheet; thereby fixing the sheet on the lower mold on the main frame;

[0050] Under the action of the lower mold main moving mechanism, the material pressing moving mechanism and the material clamping moving mechanism, the lower mold, the material pressing mechanism and the material clamping mechanism on the main frame move synchronously to the preforming station;

[0051] The rolling transverse movement mechanism moves transversely so that the lowest semi-hexagonal tooth is located directly above the first semi-hexagonal groove of the lower mold on the preforming station close to the pressing mechanism; the rolling roller and the anti-rotation lock are pressed down synchronously, and the lowest semi-hexagonal tooth is embedded in the corresponding semi-hexagonal groove, and the downward pressure of the rolling roller is within the preset pressure range; the anti-rotation lock is lifted up and separated from the anti-rotation structure of the rotating shaft; the rolling transverse movement mechanism moves toward one side of the clamping mechanism, so that the rolling roller passively rotates, thereby rolling the sheet, and at the same time, the feeding mechanism pushes the clamping plate mechanism to the side where the pressing mechanism is located, so that the sheet moves and feeds toward the rolling roller under a stable tension; after rolling to the last semi-hexagonal groove, the anti-rotation lock descends and combines with the anti-rotation structure of the rotating shaft; the rolling roller and the anti-rotation lock are lifted up synchronously; the clamping plate mechanism releases the sheet, the feeding mechanism moves horizontally to reset, and the pressing plate moves horizontally to reset; the rolling transverse movement mechanism moves horizontally to reset; rolling is performed once or multiple times;

[0052] After the rolling is completed, the pressing mechanism returns to the preheating station under the action of the pressing moving mechanism, and the clamping mechanism returns to the preheating station under the action of the clamping moving mechanism;

[0053] The lower die main moving mechanism moves the lower die on the preforming station to the lower die entry and exit press station of the main frame, and the main positioning protrusion descends and separates from the main positioning groove;

[0054] The lifting arm is pressed down, and the insert block is inserted into the slot; the lower die in-and-out press mechanism moves toward the hot press; the lower die on the lower die in-and-out press station is moved to the bottom heating plate of the hot press chamber, and its front side is against the horizontal side of the lower die positioning block; the lifting arm rises, and the lower die in-and-out press mechanism returns to the initial position;

[0055] The tapered positioning pin extends out and is inserted into the positioning hole;

[0056] The upper mold is pressed down to close the mold with the lower mold in the hot press chamber;

[0057] The tapered positioning pin retracts and returns to its original position;

[0058] Close the door and perform hot pressing;

[0059] The lower mold auxiliary moving mechanism moves to the cooling station of the auxiliary frame; the auxiliary positioning protrusion rises and extends into the auxiliary positioning groove of the lower mold on the cooling station; the lower mold auxiliary moving mechanism moves toward the main frame to move the lower mold on the cooling station to the end of the auxiliary frame close to the main frame; the auxiliary positioning protrusion descends, and the lower mold auxiliary moving mechanism is separated from the lower mold on the auxiliary frame;

[0060] The transfer rack rises; the transfer transverse movement mechanism moves transversely to one side of the lower mold moved from the cooling station; the transfer positioning protrusion rises and extends into the transfer positioning groove; the transfer transverse movement mechanism moves transversely to the other side, dragging the lower mold on the auxiliary frame to the transfer station on the main frame; the transfer positioning protrusion descends, the transfer rack descends, and is separated from the lower mold on the transfer station;

[0061] The main moving mechanism of the lower mold moves to the transfer station; the main positioning protrusion rises and extends into the main positioning groove; the main moving mechanism of the lower mold moves the lower mold to the preheating station; the main positioning protrusion descends and separates from the lower mold on the preheating station; the main moving mechanism of the lower mold moves to the lower mold in and out of the press station; the preheating mechanism preheats the lower mold on it;

[0062] The door is opened and the upper mold is lifted up;

[0063] The lower die in-and-out press mechanism moves into the hot press; the lifting arm is pressed down, and the insert block is inserted into the slot of the lower die in the hot press chamber; the lower die in-and-out press mechanism moves the lower die in the hot press chamber to the lower die in-and-out press station; the lifting arm rises and separates from the lower die in the lower die in-and-out press station;

[0064] The main positioning convex block rises and extends into the main positioning groove, and the lower mold main moving mechanism moves the lower mold on the lower mold in-and-out press station to the transfer station; the main positioning convex block descends and separates from the lower mold on the transfer station; the lower mold main moving mechanism moves to the preforming station, waiting to transfer the lower mold of the preheating station;

[0065] The transfer rack rises; the transfer positioning protrusion rises and extends into the transfer positioning groove; the transfer transverse movement mechanism moves transversely to the side with the vacant cooling station, pushing the lower mold on the main frame onto the auxiliary frame; the transfer positioning protrusion descends, and the transfer rack descends and separates from the lower mold that has been pushed onto the auxiliary frame;

[0066] The auxiliary positioning protrusion rises and extends into the auxiliary positioning groove, and the lower mold auxiliary moving mechanism moves the lower mold on the transfer station to the cooling station; the auxiliary positioning protrusion descends and separates from the lower mold on the cooling station; the lower mold auxiliary moving mechanism moves away from the cooling station;

[0067] The cooling plate rises and contacts the lower mold on it; the lower mold on the cooling station is cooled; after the lower mold on the cooling station is cooled, the cooling plate descends.

[0068] The present invention has the following advantages:

[0069] 1. It mainly realizes the rapid forming of semi-hexagonal sheets of carbon fiber prepreg sheets (including epoxy and bismuth groups, referred to as sheets) by preforming and hot pressing; and produces carbon fiber honeycomb blocks of specific specifications through subsequent gluing and bonding processes, so as to solve the problems of complex process and cumbersome process of existing preparation methods.

[0070] 2. It can realize the continuous forming of a single carbon fiber prepreg sheet to a semi-hexagonal sheet, meeting the hot pressing cycle requirements, that is, when the previous carbon fiber prepreg sheet is cured on the hot press, the next carbon fiber prepreg sheet needs to be preformed and in a waiting state, realizing fully automatic cycle production. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0072] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0073] Figure 1 A schematic structural diagram of a semi-hexagonal sheet forming machine provided by an embodiment of the present invention;

[0074] Figure 2 A schematic diagram of the positions of a lower mold, a preforming rolling mechanism, a material pressing mechanism, a material clamping mechanism, a lower mold main moving mechanism, a material pressing moving mechanism, and a material clamping moving mechanism on a main frame of a semi-hexagonal sheet forming machine provided in an embodiment of the present invention;

[0075] Figure 3 A schematic diagram of the positions of an upper mold and a lower mold of a semi-hexagonal sheet forming machine in a hot press provided by an embodiment of the present invention;

[0076] Figure 4A schematic diagram of the positions of a preheating mechanism, a lower die main moving mechanism, a lower die transfer mechanism, and a lower die in-and-out press mechanism on a main frame of a semi-hexagonal sheet forming machine provided by an embodiment of the present invention;

[0077] Figure 5 A schematic diagram of the positions of a lower mold, a cooling mechanism, and a lower mold pair moving mechanism on a sub-frame of a semi-hexagonal sheet forming machine provided by an embodiment of the present invention;

[0078] Figure 6 A schematic diagram of the positions of a preforming rolling mechanism, a material pressing mechanism, a material clamping mechanism, a material pressing moving mechanism, and a material clamping moving mechanism on a main frame of a semi-hexagonal sheet forming machine provided in an embodiment of the present invention;

[0079] Figure 7 A schematic structural diagram of positioning a lower mold of a semi-hexagonal sheet forming machine in a hot press provided by an embodiment of the present invention;

[0080] Figure 8 A schematic structural diagram of a preforming rolling mechanism of a semi-hexagonal sheet forming machine provided in an embodiment of the present invention;

[0081] Fig. 9 A schematic structural diagram of a lower die transfer mechanism of a semi-hexagonal sheet forming machine provided in an embodiment of the present invention;

[0082] Fig.10 for Figure 1 A magnified view of middle;

[0083] Fig.11 for Figure 1 Enlarged view of middle B;

[0084] Fig.12 for Figure 4 Enlarged view of middle C;

[0085] Fig.13 for Figure 4 Enlarged view of middle D;

[0086] Fig.14 for Figure 4 Enlarged view of E in the middle;

[0087] Fig.15 for Figure 5 Enlarged view of F.

[0088] In the figure: 1. lower mold; 101. semi-hexagonal groove; 102. slot; 103. positioning hole; 2. pre-forming rolling mechanism; 201. rolling roller; 20101. semi-hexagonal teeth; 20102. rotating shaft; 20103. anti-rotation structure; 202. rolling transverse movement mechanism; 203. pressurizing mechanism; 204. shaft seat mechanism; 205. anti-rotation lock; 3. pressing mechanism; 301. pressing plate; 4. clamping mechanism; 401. feeding mechanism; 402. clamping plate mechanism; 40201. upper clamping plate; 40202. lower clamping plate; 40203. rubber pad; 5. upper mold; 6. Hot press; 601. Heating plate; 602. Lower die positioning block; 603. Conical positioning pin; 7. Main frame; 8. Lower die main moving mechanism; 801. Main positioning protrusion; 9. Lower die in and out of press mechanism; 901. Lifting arm; 902. Insert block; 10. Control unit; 11. Preheating mechanism; 1101. Preheating plate; 12. Pressing and moving mechanism; 13. Clamping and moving mechanism; 14. Auxiliary frame; 15. Lower die transfer mechanism; 1501. Transfer frame; 1502. Transfer transverse movement mechanism; 1503. Transfer positioning protrusion; 16. Cooling mechanism; 17. Lower die auxiliary moving mechanism. DETAILED DESCRIPTION

[0089] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0090] like Figure 1-15 As shown, this embodiment provides a semi-hexagonal sheet forming machine, including a lower mold 1, a preforming rolling mechanism 2, a pressing mechanism 3, a clamping mechanism 4, an upper mold 5 and a hot press 6.

[0091] It should be noted that the "semi-hexagon" in this article refers to a figure formed by connecting two opposite vertices of a hexagon (dividing line), the connecting line and the three sides on one side of the connecting line. It is actually an isosceles trapezoid with a waist length equal to the base length and a base length equal to half the top length.

[0092] The upper surface of the lower mold 1 is provided with a plurality of semi-hexagonal grooves 101 extending in the front-to-back direction, and the spacing between adjacent semi-hexagonal grooves 101 is the groove bottom width of the semi-hexagonal groove 101 .

[0093] The preforming rolling mechanism 2 is provided with a rolling roller 201, and the surface of the rolling roller 201 is provided with semi-hexagonal teeth 20101 that match the semi-hexagonal grooves 101. The rolling roller 201 can roll in the left and right directions to roll and form the sheet laid on the lower mold 1. The rolling roller 201 with the semi-hexagonal teeth 20101 rolls the arranged prepreg sheet in accordance with the shape under a certain pressure, so that the prepreg sheet fits the lower mold 1 to form a preformed semi-hexagonal sheet; the preformed semi-hexagonal sheet also needs to be hot-pressed in the hot press 6 to obtain a semi-hexagonal sheet product.

[0094] The pressing mechanism 3 is used to press one side of the blank against the side of the lower mold 1 .

[0095] The clamping mechanism 4 and the pressing mechanism 3 are symmetrically distributed relative to the lower mold 1. The clamping mechanism 4 is used to clamp the other side of the sheet and feed the sheet toward the pressing mechanism 3 during the rolling process.

[0096] The upper mold 5 is movably arranged on the top of the hot pressing chamber of the hot pressing machine 6 , and a semi-hexagonal convex ridge matching the semi-hexagonal groove 101 is arranged on the lower surface.

[0097] The hot press 6 is used to close the two molds and hot press the preformed sheet sandwiched between the two molds. For example, a standard single-layer frame hot press 6 is used, with a maximum process pressure of 1.5Mpa, a pressure control accuracy of ±0.15Mpa, and a maximum heating temperature of 280°C.

[0098] Exemplarily, the upper mold 5 and the lower mold 1 are made of high-hardness aluminum material, which is formed by CNC processing with high precision; they have good surface roughness, a flat surface, clean and tidy, without pits, cracks and other defects; they have good rigidity and strength, uniform thermal distribution, and good heat transfer effect, which can meet the uniform temperature conduction during molding. The positioning structure of the lower mold 1 (referring to the main positioning groove, auxiliary positioning groove, transfer positioning groove and positioning hole 103 in the following text) is used for positioning during subsequent movement and transportation to ensure that there is no deviation and pressure resistance during rolling and hot pressing. To produce carbon fiber honeycomb blocks of different models or specifications, replace molds of different semi-hexagonal specifications.

[0099] In a preferred embodiment, the semi-hexagonal sheet forming machine further includes a main frame 7 , a lower mold main moving mechanism 8 , a lower mold in-and-out press mechanism 9 and a control unit 10 .

[0100] The main frame 7 is arranged along the front-rear direction.

[0101] The lower mold main moving mechanism 8 is arranged on the main frame 7, and a main positioning convex block 801 which can be raised and lowered is arranged on the lower mold main moving mechanism 8. A main positioning groove which matches the main positioning convex block 801 is arranged below the lower mold 1, and the lower mold main moving mechanism 8 is used to move the lower mold 1 along the main frame 7. Exemplarily, the horizontal movement is performed by the linear slide rail and the slider, the servo motor and the reducer in cooperation with the synchronous wheel and the synchronous belt, or the horizontal movement is performed by the linear slide rail and the slider, the servo motor and the reducer in cooperation with the lead screw nut. The overall device is equipped with 4 groups of symmetrical cylinders, and the top of the cylinder is provided with a convex positioning strip (this is a specific form of the main positioning convex block 801).

[0102] The lower die in-and-out press mechanism 9 is arranged on the main frame 7, and a lifting arm 901 that can be raised and lowered is arranged on the lower die in-and-out press mechanism 9. The end of the lifting arm 901 is provided with an insert block 902 that is arranged in a direction, and the rear edge of the upper surface of the lower die 1 is provided with a slot 102 that is adapted to the insert block 902. The lower die in-and-out press mechanism 9 is used to move the lower die 1 into the hot press chamber and make the lower die 1 directly below the upper die 5. Exemplarily, the whole is installed on the main frame 7 through a slide rail slider; a linear slide rail and a slider are used to cooperate with two servo motors and two planetary reducers to move horizontally synchronously; the positioning rod (this is a form of the lifting arm 901) is driven by a double cylinder to lift and lower, and the insert block 902 is inserted into the slot 102 of the lower die 1 to push the lower die 1 or pull the lower die 1 out of the hot press 6.

[0103] The control unit 10 is electrically connected to the preforming rolling mechanism 2, the pressing mechanism 3, the clamping mechanism 4, the lower die main moving mechanism 8, the lower die in-and-out press mechanism 9, and the hot press 6. By way of example, the control unit 10 is composed of a PLC, a touch screen, a control cabinet, electrical components, and a data monitoring system, and performs various functional controls on the movements required for the molding of the workpiece. The main control functions include mold temperature control, temperature reduction control, transfer speed control, molding time control, etc., and the various parameters and alarm information in the production process are stored and recorded through an industrial computer and configuration software, and the operation interface is friendly.

[0104] In a preferred embodiment, the semi-hexagonal sheet forming machine further includes a preheating mechanism 11 , a material pressing and moving mechanism 12 , and a material clamping and moving mechanism 13 .

[0105] The preheating mechanism 11 is arranged in one end of the main frame 7 away from the hot press 6 . A liftable preheating plate 1101 is arranged on the preheating mechanism 11 . The preheating plate 1101 is used to preheat the lower mold 1 .

[0106] The pressing mechanism 3 is arranged on the main frame 7, and a laterally movable pressing plate 301 is arranged on the pressing mechanism 3, which is used to abut against the side of the lower mold 1 to press one side of the sheet. The pressing moving mechanism 12 is arranged on the main frame 7, and the pressing moving mechanism 12 is used to make the pressing mechanism 3 move to the preforming station synchronously with the lower mold 1, and to make the pressing mechanism 3 return to the preheating station. Exemplarily, an integrally finely machined base carbon steel plate is used, and the slide rail, slider and auxiliary accessories are installed, and the whole is installed on the right reference plate of the main frame 7; the height matches the position of the clamping mechanism 4 and the lower mold 1 on the left.

[0107] The clamping mechanism 4 is arranged on the main frame 7, and is provided with a laterally movable feeding mechanism 401 and a clamping mechanism 402 arranged on the feeding mechanism 401, the clamping mechanism 402 is used to clamp the other side of the sheet, and the feeding mechanism 401 is used to feed at a uniform speed; the clamping moving mechanism 13 is arranged on the main frame 7, and is used to make the clamping mechanism 4 move synchronously with the lower mold 1 to the preforming station, and to make the clamping mechanism 4 return to the preheating station. Exemplarily, an overall finely machined base carbon steel plate is used to install the slide rail slider and auxiliary accessories and frame, and the whole is installed on the main frame 7. In this embodiment, it is installed on the left reference plate of the main frame 7; the height is coordinated with the position of the right pressing mechanism 3 and the lower mold 1; the clamping plate mechanism 402 includes two clamping plates that can be opened and clamped, and the two clamping plates are arranged one above and one below. The lower side surface of the upper clamping plate 40201 is provided with friction patterns, and the upper surface of the lower clamping plate 40202 is provided with a rubber pad 40203, which effectively increases the clamping friction force to better clamp the sheet; during the overall clamping and feeding of the sheet, the pulling force is adjusted and controlled by the electromagnetic proportional valve, and the sheet is gradually clamped and fed as it is preformed.

[0108] It should be noted that the clamping mechanism 13 on the left and the pressing mechanism 12 on the right and the lower mold main moving mechanism 8 drive the clamping mechanism 4, the pressing mechanism 3 and the lower mold 1 to move from the preheating station to the preforming station, and need to move synchronously to ensure that the chat does not deviate on the lower mold 1. They all use high-precision linear guide rails and sliders and servo motors with brakes to cooperate with ball screws for horizontal movement, and move synchronously with the intermediate driving lower mold 1 moving device.

[0109] The control unit 10 is electrically connected to the preheating mechanism 11 , the material pressing and moving mechanism 12 , and the material clamping and moving mechanism 13 .

[0110] In a preferred embodiment, the semi-hexagonal sheet forming machine further comprises a sub-frame 14, a lower mold transfer mechanism 15, a cooling mechanism 16 and a lower mold sub-moving mechanism 17. The cooling mechanism 16 is substantially similar to the preheating mechanism 11, except that a cooling plate is used instead of the preheating plate 1101; the lower mold sub-moving mechanism 17 is substantially the same in structure as the lower mold main moving mechanism 8.

[0111] The sub-frame 14 is provided at the middle side portion of the main frame 7 in the left-right direction.

[0112] The lower mold transfer mechanism 15 is arranged inside the main frame 7 where it intersects with the auxiliary frame 14. The lower mold transfer mechanism 15 is provided with a liftable transfer frame 1501, a transfer transverse movement mechanism 1502 that can move in the left and right directions and a liftable transfer positioning protrusion 1503 that is arranged on the transfer transverse movement mechanism 1502. The lower surface of the lower mold 1 is provided with a transfer positioning groove that matches the transfer positioning protrusion 1503. The lower mold transfer mechanism 15 is used to replace the lower mold 1 between the main frame 7 and the auxiliary frame 14. Exemplarily, the intermediate lifting and transfer positioning mechanism is designed as a dual-axis control driving lifting and horizontal movement positioning mechanism for positioning the lower mold 1, which is used to transfer the lower mold 1 to the cooling station, and mainly starts the function of transferring the lower mold 1 between the main frame 7 and the auxiliary frame 14.

[0113] The cooling mechanism 16 is arranged inside the end of the auxiliary frame 14 away from the main frame 7, and a cooling plate that can be raised and lowered is arranged on the cooling mechanism 16. For example, a linear slide rail and a slider cooperate with a cylinder to perform lifting and lowering movements, and non-contact infrared sensors are installed in front and behind the cooling plate to monitor the mold temperature.

[0114] The lower die sub-moving mechanism 17 is arranged on the sub-frame 14, and a sub-positioning convex block that can be raised and lowered is arranged on the lower die sub-moving mechanism 17, and a sub-positioning groove that matches the sub-positioning convex block is arranged below the lower die 1, and the lower die moving mechanism is used to move the lower die 1 along the sub-frame 14. Exemplarily, the linear slide rail and the slider are used to cooperate with the servo motor and the reducer to make horizontal movement with the synchronous wheel and the synchronous belt, or the linear slide rail and the slider are used to cooperate with the servo motor and the reducer to make horizontal movement with the lead screw nut. The overall device is equipped with 4 groups of symmetrical cylinders with convex positioning strips on the top, which can be used to position and move simultaneously with the lower die 1.

[0115] The control unit 10 is electrically connected to the lower mold transfer mechanism 15 , the cooling mechanism 16 , and the lower mold auxiliary moving mechanism 17 .

[0116] Preferably, the sub-frames 14 are arranged on the left and the right, and each sub-frame 14 is provided with a cooling mechanism 16 and a lower mold sub-moving mechanism 17 , and the two sub-frames 14 share a lower mold transfer mechanism 15 .

[0117] In a preferred embodiment, the pre-forming rolling mechanism 2 is provided with a rolling transverse movement mechanism 202 which can move in the left and right directions, a liftable pressurizing mechanism 203 which is arranged below the rolling transverse movement mechanism 202, and an axle seat mechanism 204 which is arranged below the pressurizing mechanism 203. A rotating shaft 20102 which rotates synchronously therewith is provided at the end of the rolling roller 201, and the shaft end of the rotating shaft 20102 is rotatably installed in the axle seat mechanism 204. A liftable anti-rotation lock 205 is provided below the rolling transverse movement mechanism 202, and the rotating shaft 20102 is provided with an anti-rotation structure 20103 used in conjunction with the anti-rotation lock 205. When the anti-rotation lock 205 cooperates with the anti-rotation structure 20103, a certain semi-hexagonal tooth 20101 is located just below the rolling roller 201 to correspond to the semi-hexagonal groove 101; specifically, the anti-rotation structure 20103 is two planes arranged in an "eight" shape on the circumferential side of the rotating shaft 20102, and the anti-rotation lock 205 is a fork-shaped structure adapted to the planes in the "eight" shape. When the anti-rotation lock 205 descends and combines with the anti-rotation structure 20103, the rotating shaft 20102 will not be able to rotate freely.

[0118] Exemplarily, the preforming rolling mechanism 2 is also provided with a main frame, which is installed on the main frame 7, and the rolling transverse movement mechanism 202 is installed on the main frame; after each replacement of the lower mold 1, the lower mold 1 is driven to the preforming station by the lower mold main moving mechanism 8, and the travel distance is controlled by the U-shaped photoelectric and servo motor to determine the stop position corresponding to the position of the rolling roller 201; the initial descending position of the rolling roller 201 is the only fixed position, and each time at this position, the cylinder automatically assists in positioning the convex point below the rolling roller 201 (referring to the semi-hexagonal tooth 20101) at the starting concave point on the right side of the lower mold 1 (referring to the semi-hexagonal groove 101) in a vertical alignment state; the rolling transverse movement mechanism 202 drives the pressure mechanism 203, the shaft seat mechanism 204 and the rolling roller 201 as a whole to move horizontally through a servo motor and a high-precision reducer, in conjunction with a screw, a slide rail, and a slider; the pressure mechanism 203 drives the rolling roller 201 up and down through two cylinders, and is equipped with a pressure device for closed-loop control to detect the size of the pressing force.

[0119] It should be noted that the rolling transverse movement mechanism 202 can also adopt a linear module; the pressurizing mechanism 203 can also adopt a hydraulic cylinder; the anti-rotation structure 20103 and the anti-rotation lock 205 can also adopt the form of holes and pins; after each replacement of the lower mold 1, other sensors can also be used for positioning.

[0120] In a preferred embodiment, the bottom and bottom of the hot press chamber are respectively provided with heating plates 601, the upper mold 5 is installed on the lower side of the top heating plate 601, and two lower mold positioning blocks 602 are provided on the bottom heating plate 601. The lower mold positioning blocks 602 include horizontal edges arranged along the left and right directions and longitudinal edges arranged along the front and rear directions. The two lower mold positioning blocks 602 are arranged symmetrically on the left and right sides, and the horizontal edges are arranged on the inner side of the front end of the longitudinal edges, wherein the inner side of the longitudinal edges is provided with an inclined surface offset from front to back and outward, and the inclination angle is ≥15°, so as to ensure that the lower mold 1 can be normally withdrawn after the high temperature process; the left and right sides of the lower mold 1 are provided with positioning holes 103, and the hot press chamber is provided with tapered positioning pins 603 movable along the left and right directions, and the cone angle is ≥15°, so as to ensure that the positioning holes 103 can be normally withdrawn after the high temperature process, and the tapered positioning pins 603 are correspondingly distributed on the left and right sides of the lower mold 1. The lower mold 1 entering the hot press 6 is positioned to prevent deviation during the operation process. Exemplarily, the conical positioning pin 603 is installed on the overall retractable device, and the sliding optical axis and sleeves on both sides cooperate with the air-to-liquid booster cylinder to move telescopically.

[0121] This embodiment also provides a semi-hexagonal sheet forming process, which uses the semi-hexagonal sheet forming machine of any of the above embodiments, and includes the following steps:

[0122] Laying the sheet on the lower mold 1;

[0123] The material sheet is fixed by using the material pressing mechanism 3 and the material clamping mechanism 4;

[0124] The preforming rolling mechanism is used for rolling forming; the semi-hexagonal teeth 20101 directly below are embedded in the first semi-hexagonal groove 101 of the lower mold 1 close to the material pressing mechanism 3, and the rolling roller 201 moves toward the side where the clamping mechanism 4 is located. During the movement, the rolling roller 201 is passively rotated;

[0125] The clamping mechanism 4 feeds the material to the side where the pressing mechanism 3 is located, so that the rolling and feeding are kept in a balanced state, and the sheet is prevented from being overstretched during the rolling forming process;

[0126] After rolling is completed, the preformed sheet is transferred to the hot pressing chamber together with the lower mold 1;

[0127] The upper mold 5 is pressed down to close the mold with the lower mold 1, and the preform sheet is clamped between the two molds;

[0128] After hot pressing in the hot pressing chamber for a certain period of time, the upper mold 5 moves up, the chamber is opened, and the hot-pressed semi-hexagonal sheet is taken out together with the lower mold 1;

[0129] Demould after cooling down.

[0130] In a preferred embodiment, each step of the molding process is automatically completed under the control of the control unit 10, including:

[0131] Control the temperature in the hot pressing chamber to rise to a predetermined hot pressing temperature, and control the temperature of the preheating plate 1101 to rise to a predetermined preheating temperature;

[0132] The lower mold main moving mechanism 8 moves the lower mold 1 on the main frame 7 to the preheating station of the main frame 7; the main positioning protrusion 801 descends and separates from the lower mold 1 on the preheating station; the lower mold main moving mechanism 8 moves away from the preheating station;

[0133] The preheating plate 1101 rises and contacts the lower mold 1 on the preheating station of the main frame 7 to preheat the lower mold 1 on the preheating station; after the preheating is completed, the preheating plate 1101 descends;

[0134] The lower mold main moving mechanism 8 moves to the preheating station, and the main positioning protrusion 801 rises and extends into the main positioning groove;

[0135] The pressing plate 301 extends out to press one side of the sheet against the side of the lower mold 1 on the preheating station; the clamping plate mechanism 402 clamps the other side of the sheet; thereby fixing the sheet on the lower mold 1 on the main frame 7;

[0136] Under the action of the lower mold main moving mechanism 8, the material pressing moving mechanism 12 and the material clamping moving mechanism 13, the lower mold 1, the material pressing mechanism 3 and the material clamping mechanism 4 on the main frame 7 are synchronously moved to the preforming station;

[0137] The rolling transverse movement mechanism 202 moves transversely, so that the lowest semi-hexagonal tooth 20101 is located directly above the first semi-hexagonal groove of the lower mold 1 close to the pressing mechanism 3 on the preforming station; the rolling roller 201 and the anti-rotation lock 205 are pressed down synchronously, and the lowest semi-hexagonal tooth 20101 is embedded in the corresponding semi-hexagonal groove 101, and the downward pressure of the rolling roller 201 is within the preset pressure range; the anti-rotation lock 205 is lifted up and separated from the anti-rotation structure 20103 of the rotating shaft 20102; the rolling transverse movement mechanism 202 moves toward one side of the clamping mechanism 4, so that the rolling roller 201 Passively rotate to roll the sheet, and at the same time, the feeding mechanism 401 pushes the clamping mechanism 402 to the side where the pressing mechanism 3 is located, so that the sheet moves to the rolling roller 201 under a stable tension. After rolling to the last semi-hexagonal groove 101, the anti-rotation lock 205 descends and combines with the anti-rotation structure 20103 of the rotating shaft 20102; the rolling roller 201 and the anti-rotation lock 205 are lifted synchronously; the clamping mechanism 402 releases the sheet, the feeding mechanism 401 moves horizontally to reset, and the pressing plate 301 moves horizontally to reset; the rolling horizontal movement mechanism 202 moves horizontally to reset; rolling once or multiple times;

[0138] After the rolling is completed, the pressing mechanism 3 returns to the preheating station under the action of the pressing moving mechanism 12, and the clamping mechanism 4 returns to the preheating station under the action of the clamping moving mechanism 13;

[0139] The lower mold main moving mechanism 8 moves the lower mold 1 on the preforming station to the lower mold entry and exit press station of the main frame 7, and the main positioning protrusion 801 descends and separates from the main positioning groove;

[0140] The lifting arm 901 is pressed downward, and the insert block 902 is inserted into the slot 102; the lower die in-and-out press mechanism 9 moves toward the hot press 6; the lower die 1 on the lower die in-and-out press station is moved to the bottom heating plate 601 of the hot press chamber, and its front side is against the horizontal side of the lower die positioning block 602; the lifting arm 901 rises, and the lower die in-and-out press mechanism 9 returns to the initial position;

[0141] The tapered positioning pin 603 extends out and is inserted into the positioning hole 103;

[0142] The upper mold 5 is pressed down to close the mold with the lower mold 1 in the hot pressing chamber;

[0143] The tapered positioning pin 603 is retracted and reset;

[0144] Close the door and perform hot pressing;

[0145] The lower mold auxiliary moving mechanism 17 moves to the cooling station of the auxiliary frame 14; the auxiliary positioning protrusion rises and extends into the auxiliary positioning groove of the lower mold 1 on the cooling station; the lower mold auxiliary moving mechanism 17 moves toward the main frame 7 to move the lower mold 1 on the cooling station to the end of the auxiliary frame 14 close to the main frame 7; the auxiliary positioning protrusion descends, and the lower mold auxiliary moving mechanism 17 is separated from the lower mold 1 on the auxiliary frame 14;

[0146] The transfer frame 1501 rises; the transfer transverse movement mechanism 1502 moves transversely to one side of the lower mold 1 moved from the cooling station; the transfer positioning protrusion 1503 rises and extends into the transfer positioning groove; the transfer transverse movement mechanism 1502 moves transversely to the other side, dragging the lower mold 1 on the auxiliary frame 14 to the transfer station on the main frame 7; the transfer positioning protrusion 1503 descends, and the transfer frame 1501 descends and separates from the lower mold 1 on the transfer station;

[0147] The lower mold main moving mechanism 8 moves to the transfer station; the main positioning protrusion 801 rises and extends into the main positioning groove; the lower mold main moving mechanism 8 moves the lower mold 1 to the preheating station; the main positioning protrusion 801 descends and separates from the lower mold 1 on the preheating station; the lower mold main moving mechanism 8 moves to the lower mold in and out of the press station; the preheating mechanism 11 preheats the lower mold 1 thereon;

[0148] The door is opened and the upper mold 5 is lifted up;

[0149] The lower die in-and-out press mechanism 9 moves into the hot press 6; the lifting arm 901 is pressed down, and the insert block 902 is inserted into the slot 102 of the lower die 1 in the hot press chamber; the lower die in-and-out press mechanism 9 moves the lower die 1 in the hot press chamber to the lower die in-and-out press station; the lifting arm 901 rises and separates from the lower die 1 in the lower die in-and-out press station;

[0150] The main positioning protrusion 801 rises and extends into the main positioning groove, and the lower mold main moving mechanism 8 moves the lower mold 1 on the lower mold in-and-out press station to the transfer station; the main positioning protrusion 801 descends and separates from the lower mold 1 on the transfer station; the lower mold main moving mechanism 8 moves to the preforming station, waiting to transfer the lower mold 1 of the preheating station;

[0151] The transfer rack 1501 rises; the transfer positioning protrusion 1503 rises and extends into the transfer positioning groove; the transfer transverse movement mechanism 1502 moves transversely to the side with the vacant cooling station, and pushes the lower mold 1 on the main frame 7 onto the auxiliary frame 14; the transfer positioning protrusion 1503 descends, and the transfer rack 1501 descends and separates from the lower mold 1 that has been pushed onto the auxiliary frame 14;

[0152] The auxiliary positioning protrusion rises and extends into the auxiliary positioning groove, and the lower mold auxiliary moving mechanism 17 moves the lower mold 1 on the transfer station to the cooling station; the auxiliary positioning protrusion descends and separates from the lower mold 1 on the cooling station; the lower mold auxiliary moving mechanism 17 moves away from the cooling station;

[0153] The cooling plate rises and contacts the lower mold 1 thereon; the lower mold 1 on the cooling station is cooled; after the lower mold 1 on the cooling station is cooled, the cooling plate descends.

[0154] The following is an example of a structure with a main frame 7 (corresponding to a set of preheating, preforming and hot pressing related structures) and two sub-frames 14 (corresponding to two sets of cooling and demoulding related structures) to explain the operation of automated production of semi-hexagonal sheets.

[0155] 1. Preliminary preparation. Install the upper mold 5 under the upper heating plate 601 of the hot press 6 and mechanically position and install it. Place the three lower molds 1 in the cooling stations of the two auxiliary frames 14 and the preheating stations (also called loading preheating stations, loading stations, and heating stations) of the main frame 7. Set all parameters according to the process parameter requirements.

[0156] 2. The operator obtains the prepreg sheet from the raw material placement table, removes the upper isolation film, and flips it over and places it on the lower mold 1 on the preheating station of the main frame 7. Then remove the back isolation film. The sheet is positioned and fixed simultaneously by the pressing mechanism 3 on the right and the clamping mechanism 4 on the left and the positioning retaining edge at the rear side of the lower mold 1.

[0157] 3. After setting all the operating parameters through the touch screen, press the automatic operation button of the equipment to start the automatic operation; during automatic operation, the temperature in the preheating station and the press must meet the process requirements. At this time, the equipment automatically operates, and the operator continues to peel off the isolation film of a sheet, waiting for the lower mold 1 on the right side (here is an example, the left side can also be transferred first) of the auxiliary frame 14 to arrive at the preheating station.

[0158] 4. The heating plate 601 of the preheating mechanism 11 automatically descends (in the third step, the lower mold 1 has been preheated to the corresponding temperature by the heating plate 601), and at the same time, the lower mold main moving mechanism 8 moves to the upper part of the heating station of the main frame 7. Afterwards, the lower mold 1 is driven by the lower mold main moving mechanism 8 to move to the preforming station (also called rolling station, preforming rolling station) where the preforming rolling mechanism 2 is located. At the same time, the pressing mechanism 3 on the right and the clamping mechanism 4 on the left are driven by the pressing moving mechanism 12 and the clamping moving mechanism 13, respectively, and move to the preforming rolling station synchronously with the lower mold main moving mechanism 8.

[0159] 5. After the lower mold 1 is in place, the rolling roller 201 of the preforming rolling mechanism 2 fits the lower mold 1 through the lifting of the cylinders on both sides and the given set pressure to pre-press the sheet; it is driven by the servo motor, reducer and lead screw slide to move horizontally, thereby rolling the sheet to preform the material. The number of rolling times can be set, and the rolling is cyclically carried out in the same direction. While the rolling roller 201 moves horizontally, the clamping mechanism 4 on the left side follows the feeding, and releases the sheet at the same time after it is in place.

[0160] 6. After the set rolling times, the right press mechanism 3 opens. Driven by the lower mold main moving mechanism 8, the lower mold 1 moves to the front of the entrance of the hot press 6 (here is the lower mold in and out press station of the main frame 7). The lifting arm 901 of the lower mold in and out press mechanism 9 descends, and the positioning insert 902 is inserted into the slot 102 of the lower mold 1, and the lower mold main moving mechanism 8 releases the lower mold 1.

[0161] 7. The lower mold in-and-out press mechanism 9 moves along the main frame 7, pushing the lower mold 1 into the hot press 6. After reaching the positioning position, the tapered positioning pins 603 on both sides extend out and insert into the positioning holes 103 on both sides of the lower mold 1, closing and positioning. The upper mold 5 descends and closes the mold with the lower mold 1, and the tapered positioning pins 603 are retracted. The hot press 6 starts to work according to the set pressure, temperature and time.

[0162] 8. After the lower mold 1 on the main frame 7 moves toward the direction of the hot press 6 and passes the lower mold transfer mechanism 15 (referring to the lower mold 1 passing the transfer station), the transfer frame 1501 of the lower mold transfer mechanism 15 automatically rises, and the transfer transverse movement mechanism 1502 moves to the far right; the lower mold 1 of the right cooling station (also known as the cooling and demolding station, the unloading station, and the demolding station) moves toward the middle direction through the lower mold auxiliary moving mechanism 17. After it is in place, the transfer positioning protrusion 1503 of the lower mold transfer mechanism 15 rises and extends into the transfer positioning groove of the lower mold 1, and the lower mold auxiliary moving mechanism 17 on the right auxiliary frame 14 releases the lower mold 1 (referring to the auxiliary positioning protrusion descending and separating from the auxiliary positioning groove), and the transfer transverse movement mechanism 1502 of the lower mold transfer mechanism 15 moves to the left as a whole, driving the lower mold 1 on the auxiliary frame 14 to reach the transfer station of the main frame 7.

[0163] 9. The transfer frame 1501 of the lower mold transfer mechanism 15 descends as a whole, so that the lower mold 1 is placed on the main frame 7; the lower mold main moving mechanism 8 moves to the upper part of the lower mold transfer mechanism 15 as a whole (that is, the lower mold main moving mechanism 8 moves to the transfer station), and the main positioning protrusion 801 rises and extends into the main positioning groove of the lower mold 1, and the lower mold main moving mechanism 8 drives the lower mold 1 to move to the loading station.

[0164] 10. The operator places the peeled sheet on the lower mold 1 and starts the cycle from step 2. When the cycle continues, the lower mold 1 in the hot press 6 needs to be transferred to the cooling station on the right.

[0165] The semi-hexagonal sheet forming machine and forming process provided in this embodiment have the following advantages:

[0166] 1. The main purpose is to achieve rapid prototyping of carbon fiber prepreg sheets (including epoxy and bismuth groups, hereinafter referred to as sheets) into semi-hexagonal sheets by preforming and hot pressing; and to produce carbon fiber honeycomb blocks of specific specifications through subsequent gluing and bonding processes, thereby solving the problems of complex and cumbersome processes in existing preparation methods.

[0167] 2. It can realize the continuous forming of a single carbon fiber prepreg sheet to a semi-hexagonal sheet, meeting the hot pressing cycle requirements, that is, when the previous carbon fiber prepreg sheet is cured on the hot press, the next carbon fiber prepreg sheet needs to be preformed and in a waiting state, realizing fully automatic cycle production.

[0168] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A semi-hexagonal sheet forming machine, characterized in that: It includes a lower mold, a preforming rolling mechanism, a material pressing mechanism, a material clamping mechanism, an upper mold and a hot press; The upper surface of the lower mold (1) is provided with a plurality of semi-hexagonal grooves (101) extending in the front-to-back direction, and the spacing between adjacent semi-hexagonal grooves (101) is the groove bottom width of the semi-hexagonal grooves (101); The preforming rolling mechanism (2) is provided with a rolling roller (201), the surface of the rolling roller (201) is provided with semi-hexagonal teeth (20101) adapted to the semi-hexagonal grooves (101), and the rolling roller (201) can roll in the left-right direction to perform rolling forming on the sheet laid on the lower mold (1); The material pressing mechanism (3) is used to press one side edge of the material sheet against the side of the lower mold (1); The clamping mechanism (4) and the pressing mechanism (3) are symmetrically distributed relative to the lower mold (1), and the clamping mechanism (4) is used to clamp the other side of the sheet and feed the sheet in the direction of the pressing mechanism (3) during the rolling forming process; The upper mold (5) is arranged on the top of the hot pressing chamber of the hot pressing machine (6) in a liftable manner, and a semi-hexagonal convex ridge matching the semi-hexagonal groove (101) is arranged on the lower surface; The hot press (6) is used to close the two molds and hot-press the preformed sheet sandwiched between the two molds.

2. The semi-hexagonal sheet forming machine according to claim 1, characterized in that: The semi-hexagonal sheet forming machine also includes a main frame (7), a lower die main moving mechanism (8), a lower die in and out press mechanism (9) and a control unit (10); The main frame (7) is arranged along the front-rear direction; The lower die main moving mechanism (8) is arranged on the main frame (7) and can move along the main frame (7); a main positioning convex block (801) that can be raised and lowered is arranged on the lower die main moving mechanism (8); a main positioning groove that matches the main positioning convex block (801) is arranged below the lower die (1); the lower die main moving mechanism (8) is used to move the lower die (1) along the main frame (7); The lower die in-and-out press mechanism (9) is arranged on the main frame (7) and can move along the main frame (7); a lifting arm (901) that can be lifted and lowered is arranged on the lower die in-and-out press mechanism (9); an insert block (902) that is arranged toward the end of the lifting arm (901); a slot (102) that is adapted to the insert block (902) is arranged on the rear edge of the upper surface of the lower die (1); the lower die in-and-out press mechanism (9) is used to move the lower die (1) into the hot pressing chamber and make the lower die (1) be located directly below the upper die (5); The control unit (10) is electrically connected to the preforming rolling mechanism (2), the material pressing mechanism (3), the material clamping mechanism (4), the lower die main moving mechanism (8), the lower die in-and-out press mechanism (9), and the hot press (6).

3. The semi-hexagonal sheet forming machine according to claim 2, characterized in that: The semi-hexagonal sheet forming machine further comprises a preheating mechanism (11), a material pressing and moving mechanism (12) and a material clamping and moving mechanism (13); The preheating mechanism (11) is arranged in an end of the main frame (7) away from the hot press (6), and a liftable preheating plate (1101) is arranged on the preheating mechanism (11), and the preheating plate (1101) is used to preheat the lower mold (1); The material pressing mechanism (3) is arranged on the main frame (7), and a laterally movable pressing plate (301) is arranged on the material pressing mechanism (3) for abutting against the side edge of the lower mold (1) to press one side edge of the material sheet; The material pressing moving mechanism (12) is arranged on the main frame (7), and is used to make the material pressing mechanism (3) move synchronously with the lower mold (1) to the preforming station, and to make the material pressing mechanism (3) return to the preheating station; The clamping mechanism (4) is arranged on the main frame (7), and a feeding mechanism (401) that can move laterally and a clamping plate mechanism (402) arranged on the feeding mechanism (401) are arranged on the clamping mechanism (44), the clamping plate mechanism (402) is used to clamp the other side of the material sheet, and the feeding mechanism (401) is used to feed the material at a uniform speed; The material clamping moving mechanism (13) is arranged on the main frame (7), and is used to make the material clamping mechanism (4) move synchronously with the lower mold (1) to the preforming station, and to make the material clamping mechanism (4) return to the preheating station; The control unit (10) is electrically connected to the preheating mechanism (11), the material pressing and moving mechanism (12) and the material clamping and moving mechanism (13) respectively.

4. The semi-hexagonal sheet forming machine according to claim 2, characterized in that: The semi-hexagonal sheet forming machine also includes a sub-frame (14), a lower die transfer mechanism (15), a cooling mechanism (16) and a lower die sub-moving mechanism (17); The auxiliary frame (14) is arranged on the middle side of the main frame (7) along the left-right direction; The lower mold transfer mechanism (15) is arranged inside the main frame (7) where it intersects with the auxiliary frame (14); the lower mold transfer mechanism (15) is provided with a liftable transfer frame (1501), a transfer transverse movement mechanism (1502) that can move in the left and right directions and is arranged on the transfer frame (1501); and a liftable transfer positioning protrusion (1503) that is arranged on the transfer transverse movement mechanism (1502); the lower surface of the lower mold (1) is provided with a transfer positioning groove that is compatible with the transfer positioning protrusion (1503); and the lower mold transfer mechanism (15) is used to replace the lower mold (1) between the main frame (7) and the auxiliary frame (14); The cooling mechanism (16) is arranged inside an end of the auxiliary frame (14) away from the main frame (7), and a cooling plate that can be raised and lowered is arranged on the cooling mechanism (16); The lower die auxiliary moving mechanism (17) is arranged on the auxiliary frame (14) and can move along the auxiliary frame (14); a lifting auxiliary positioning protrusion is arranged on the lower die auxiliary moving mechanism (17); a secondary positioning groove matched with the auxiliary positioning protrusion is arranged below the lower die (1); and the lower die moving mechanism is used to move the lower die (1) along the auxiliary frame (14); The control unit (10) is electrically controlled and connected to the lower mold transfer mechanism (15), the cooling mechanism (16), and the lower mold pair moving mechanism (17).

5. The semi-hexagonal sheet forming machine according to claim 2, characterized in that: The pre-forming rolling mechanism (2) is provided with a rolling transverse movement mechanism (202) that can move in the left and right directions, a pressurizing mechanism (203) that can be raised and lowered and arranged below the rolling transverse movement mechanism (202), and an axle seat mechanism (204) that is arranged below the pressurizing mechanism (203); the end of the rolling roller (201) is provided with a rotating shaft (20102) that rotates synchronously therewith, and the shaft end of the rotating shaft (20102) is rotatably installed in the axle seat mechanism (204).

6. The semi-hexagonal sheet forming machine according to claim 5, characterized in that: A liftable anti-rotation lock (205) is provided below the rolling transverse movement mechanism (202), and the rotating shaft (20102) is provided with an anti-rotation structure (20103) used in conjunction with the anti-rotation lock (205). When the anti-rotation lock (205) cooperates with the anti-rotation structure (20103), one of the semi-hexagonal teeth (20101) is located exactly below the rolling roller (201) to correspond to the semi-hexagonal groove (101).

7. The semi-hexagonal sheet forming machine according to claim 2, characterized in that: The bottom and the bottom of the hot pressing chamber are respectively provided with heating plates (601), the upper mold (5) is installed on the lower side of the top heating plate (601), and two lower mold positioning blocks (602) are provided on the bottom heating plate (601), and the lower mold positioning blocks (602) include a horizontal edge arranged along the left-right direction and a longitudinal edge along the front-back direction, and the two lower mold positioning blocks (602) are arranged symmetrically on the left and right, and the horizontal edge is arranged on the inner side of the front end of the longitudinal edge, wherein the inner side of the longitudinal edge is provided with an inclined surface offset outward from front to back; Positioning holes (103) are provided on the left and right sides of the lower mold (1), and conical positioning pins (603) movable in left and right directions are provided in the hot pressing chamber. The conical positioning pins (603) are correspondingly distributed on the left and right sides of the lower mold (1).

8. A semi-hexagonal sheet forming process, characterized in that: Using the semi-hexagonal sheet forming machine as described in any one of claims 1 to 7 comprises the following steps: Laying the sheet on the lower mold (1); The material sheet is fixed by using a material pressing mechanism (3) and a material clamping mechanism (4); The preforming rolling mechanism is used for rolling forming; the semi-hexagonal teeth (20101) directly below are embedded in the first semi-hexagonal groove (101) of the lower mold (1) close to the material pressing mechanism (3), and the rolling roller (201) moves toward the side where the material clamping mechanism (4) is located. During the movement, the rolling roller (201) is passively rotated; The material clamping mechanism (4) feeds the material to the side where the material pressing mechanism (3) is located, so that the rolling and feeding are kept in a balanced state, thereby preventing the material sheet from being overstretched during the rolling forming process; After rolling is completed, the preformed sheet is transferred to the hot pressing chamber together with the lower mold (1); The upper mold (5) is pressed downward to close the mold with the lower mold (1) to clamp the preform sheet between the two molds; After hot pressing in the hot pressing chamber for a certain period of time, the upper mold (5) moves upward, the chamber is opened, and the hot-pressed semi-hexagonal sheet is taken out together with the lower mold (1); Demould after cooling down.

9. The semi-hexagonal sheet forming process according to claim 8, characterized in that: Each step of the molding process is automatically completed under the control of the control unit (10), including: Controlling the temperature in the hot pressing chamber to rise to a predetermined hot pressing temperature, and controlling the temperature of the preheating plate (1101) to rise to a predetermined preheating temperature; The lower mold main moving mechanism (8) moves the lower mold (1) on the main frame (7) to the preheating station of the main frame (7); the main positioning protrusion (801) descends and separates from the lower mold (1) on the preheating station; the lower mold main moving mechanism (8) moves away from the preheating station; The preheating plate (1101) rises and contacts the lower mold (1) on the preheating station of the main frame (7) to preheat the lower mold (1) on the preheating station; after the preheating is completed, the preheating plate (1101) descends; The lower mold main moving mechanism (8) moves to the preheating station, and the main positioning protrusion (801) rises and extends into the main positioning groove; The pressing plate (301) extends out to press one side of the sheet against the side of the lower mold (1) on the preheating station; the clamping plate mechanism (402) clamps the other side of the sheet; thereby fixing the sheet on the lower mold (1) on the main frame (7); Under the action of the lower mold main moving mechanism (8), the material pressing moving mechanism (12) and the material clamping moving mechanism (13), the lower mold (1), the material pressing mechanism (3) and the material clamping mechanism (4) on the main frame (7) are synchronously moved to the preforming station; The rolling transverse movement mechanism (202) is transversely moved so that the bottom semi-hexagonal tooth (20101) is located directly above the first semi-hexagonal groove of the lower mold (1) on the preforming station close to the pressing mechanism (3); the rolling roller (201) and the anti-rotation lock (205) are pressed downward synchronously, and the bottom semi-hexagonal tooth (20101) is embedded in the corresponding semi-hexagonal groove (101), and the downward pressure of the rolling roller (201) is within a preset pressure range; the anti-rotation lock (205) is lifted up and separated from the anti-rotation structure (20103) of the rotating shaft (20102); the rolling transverse movement mechanism (202) moves toward one side of the clamping mechanism (4), so that the rolling roller (201 ) is passively rotated, thereby rolling the sheet, and at the same time, the feeding mechanism (401) pushes the clamping plate mechanism (402) to the side where the pressing mechanism (3) is located, so that the sheet moves to the rolling roller (201) for feeding under a stable tension; after rolling to the last semi-hexagonal groove (101), the anti-rotation lock (205) descends and combines with the anti-rotation structure (20103) of the rotating shaft (20102); the rolling roller (201) and the anti-rotation lock (205) are synchronously lifted; the clamping plate mechanism (402) releases the sheet, the feeding mechanism (401) moves horizontally and resets, and the pressing plate (301) moves horizontally and resets; the rolling horizontal movement mechanism (202) moves horizontally and resets; rolling is performed once or multiple times; After the rolling is completed, the pressing mechanism (3) returns to the preheating station under the action of the pressing moving mechanism (12), and the clamping mechanism (4) returns to the preheating station under the action of the clamping moving mechanism (13); The lower mold main moving mechanism (8) moves the lower mold (1) on the preforming station to the lower mold entry and exit press station of the main frame (7), and the main positioning protrusion (801) descends and separates from the main positioning groove; The lifting arm (901) is pressed downward, and the insert block (902) is inserted into the slot (102); the lower die in-and-out press mechanism (9) moves toward the hot press (6); the lower die (1) on the lower die in-and-out press station is moved to the bottom heating plate (601) of the hot press chamber, and its front side is against the horizontal side of the lower die positioning block (602); the lifting arm (901) is raised, and the lower die in-and-out press mechanism (9) returns to the initial position; The tapered positioning pin (603) extends out and is inserted into the positioning hole (103); The upper mold (5) is pressed downward to engage with the lower mold (1) in the hot pressing chamber; The tapered positioning pin (603) is retracted and reset; Close the door and perform hot pressing; The lower die auxiliary moving mechanism (17) moves to the cooling station of the auxiliary frame (14); the auxiliary positioning protrusion rises and extends into the auxiliary positioning groove of the lower die (1) on the cooling station; the lower die auxiliary moving mechanism (17) moves toward the main frame (7) to move the lower die (1) on the cooling station to one end of the auxiliary frame (14) close to the main frame (7); the auxiliary positioning protrusion descends, and the lower die auxiliary moving mechanism (17) is separated from the lower die (1) on the auxiliary frame (14); The transfer frame (1501) rises; the transfer transverse movement mechanism (1502) moves transversely to one side of the lower mold (1) moved from the cooling station; the transfer positioning protrusion (1503) rises and extends into the transfer positioning groove; the transfer transverse movement mechanism (1502) moves transversely to the other side, dragging the lower mold (1) on the auxiliary frame (14) to the transfer station on the main frame (7); the transfer positioning protrusion (1503) descends, and the transfer frame (1501) descends and separates from the lower mold (1) on the transfer station; The lower mold main moving mechanism (8) moves to the transfer station; the main positioning protrusion (801) rises and extends into the main positioning groove; the lower mold main moving mechanism (8) moves the lower mold (1) to the preheating station; the main positioning protrusion (801) descends and separates from the lower mold (1) on the preheating station; the lower mold main moving mechanism (8) moves to the lower mold entry and exit press station; the preheating mechanism (11) preheats the lower mold (1) thereon; The door is opened and the upper mold (5) is lifted up; The lower die in-and-out press mechanism (9) moves into the hot press (6); the lifting arm (901) is pressed downward, and the insert block (902) is inserted into the slot (102) of the lower die (1) in the hot press chamber; the lower die in-and-out press mechanism (9) moves the lower die (1) in the hot press chamber to the lower die in-and-out press station; the lifting arm (901) rises and separates from the lower die (1) in the lower die in-and-out press station; The main positioning protrusion (801) rises and extends into the main positioning groove, and the lower mold main moving mechanism (8) moves the lower mold (1) on the lower mold in-and-out press station to the transfer station; the main positioning protrusion (801) descends and separates from the lower mold (1) on the transfer station; the lower mold main moving mechanism (8) moves to the preforming station and waits for the lower mold (1) to be transferred to the preheating station; The transfer rack (1501) rises; the transfer positioning protrusion (1503) rises and extends into the transfer positioning groove; the transfer transverse movement mechanism (1502) moves transversely to the side of the vacant cooling station, pushing the lower mold (1) on the main frame (7) onto the auxiliary frame (14); the transfer positioning protrusion (1503) descends, and the transfer rack (1501) descends and separates from the lower mold (1) that has been pushed onto the auxiliary frame (14); The auxiliary positioning protrusion rises and extends into the auxiliary positioning groove, and the lower mold auxiliary moving mechanism (17) moves the lower mold (1) on the transfer station to the cooling station; the auxiliary positioning protrusion descends and separates from the lower mold (1) on the cooling station; The lower die pair moving mechanism (17) is moved away from the cooling station; The cooling plate rises and contacts the lower mold (1) thereon; the lower mold (1) on the cooling station is cooled; after the lower mold (1) on the cooling station is cooled, the cooling plate descends.

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