Composite material rear bottom plate reinforcing plate net size forming die

Abstract

The utility model discloses a composite material rear bottom plate reinforcing plate net size forming die which comprises an upper die and a lower die, a female die is arranged in the upper die, a male die is arranged in the lower die, and when the upper die and the lower die are assembled, a composite material rear bottom plate reinforcing plate is formed in a cavity under the action of the male die and the female die; the rear floor reinforcing plate is designed to be formed in a net size mode, CNC edge cutting and other machining procedures are not needed, the continuity of fibers is guaranteed, the strength of the rear floor reinforcing plate is improved, meanwhile, the forming period can be greatly shortened by selecting the rapidly-cured prepreg, and the manufacturing cost is reduced; the PCM process is high in automation degree, the product consistency is good, a double-face mold is used, the two faces of the product are smooth and flat, and the requirement for double-face assembly can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber composite material rear floor reinforcement plate forming, in particular to a net size forming die for a composite material rear floor reinforcement plate. Background Art

[0002] In recent years, lightweighting has become a core technology and a key development direction for the automotive industry. However, the industry currently prefers aluminum alloys due to cost constraints. Carbon fiber composites are notoriously slow to process, have a low degree of automation, and require subsequent edge cutting, among other factors. Furthermore, autoclave molding uses a single-sided mold, resulting in a smooth, flat surface on only one side, making it difficult to achieve double-sided assembly. Summary of the Invention

[0003] The utility model aims to provide a net size forming die for a composite rear floor reinforcement plate, which solves the problems of high processing cost, complex forming die and low degree of automation of carbon fiber composite automobile parts.

[0004] In order to solve the above technical problems, the utility model provides a composite material rear floor reinforcement plate net size forming mold, including an upper mold and a lower mold, a concave mold is provided in the upper mold, and a convex mold is provided in the lower mold. When the upper mold and the lower mold are closed, the composite material rear floor reinforcement plate is formed in the mold cavity under the action of the convex mold and the concave mold;

[0005] The upper mold includes an upper base plate, an upper support plate, an upper mold body, an upper ejector pin, an upper heat insulation plate and an upper thermocouple;

[0006] Wherein, an upper heating oil circulation channel is horizontally opened in the upper mold, and an upper ejector hole is vertically opened; upper mold guide column holes are opened at the four corners of the upper mold;

[0007] The lower mold includes a lower base plate, a lower support plate, a lower mold body, a lower ejector pin, a lower heat insulation plate and a lower thermocouple;

[0008] Wherein, a lower heating oil circulation channel is horizontally opened in the lower die, and a lower ejector hole is vertically opened; and lower die guide columns are opened at the four corners of the lower die.

[0009] Preferably, the upper base plate and the lower base plate are both provided with mounting grooves, and bolts are used to connect and fix them to the press through the mounting grooves.

[0010] Preferably, the upper support plate includes four pieces, which are distributed in the front, back, left and right of the upper support plate, and are used to connect the upper base plate and the upper mold body;

[0011] The lower support plate includes four pieces, which are distributed at the front, back, left and right of the lower support plate and are used to connect the lower base plate and the lower mold body.

[0012] Preferably, the upper heating oil circulation channel is circulated in the upper mold body, and heating oil flows through the upper heating oil circulation channel, thereby heating the upper mold body;

[0013] The lower heating oil circulation channel is circulated and opened in the lower mold body, and heating oil flows through the lower heating oil circulation channel, thereby heating the lower mold body.

[0014] Preferably, an upper thermocouple mounting hole is provided in the upper mold body for mounting the upper thermocouple to monitor the temperature of the upper mold body;

[0015] A lower thermocouple mounting hole is provided in the lower mold body for mounting the lower thermocouple, thereby monitoring the temperature of the lower mold body.

[0016] Preferably, the upper ejector is connected to an upper ejector oil cylinder, and under the action of the upper ejector oil cylinder, the upper ejector is driven to perform ejection or retraction movement along the upper ejector hole;

[0017] The lower ejector is connected to the lower ejector oil cylinder, and under the action of the lower ejector oil cylinder, the lower ejector is driven to perform ejection or retraction movement along the lower ejector hole;

[0018] When molding the composite material rear bottom plate reinforcement plate, the upper ejector pin and the lower ejector pin are both in an ejection state to prevent the composite material from flowing into the ejector pin hole; when molding is completed, the upper ejector pin and the lower ejector pin are both in a retracted state, and compressed air passes through the upper ejector pin hole and the lower ejector pin hole to separate the molded composite material rear bottom plate reinforcement plate from the mold body.

[0019] Preferably, the upper heat insulation plate covers the four sides of the upper mold body to isolate the heat of the upper mold body; the lower heat insulation plate covers the four sides of the lower mold body to isolate the heat of the lower mold body.

[0020] Preferably, the upper mold guide post hole and the lower mold guide post cooperate with each other to ensure that the upper mold and the lower mold are accurately clamped.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The utility model uses fast-curing prepreg, which greatly shortens the processing cycle. The PCM process is used to improve the degree of automation of the process, which also improves the stability and consistency of the product. The net size molding mold is used to reduce the subsequent trimming process and save costs. At the same time, the mechanical properties and weather resistance of the product are well maintained.

[0023] 2. The net size forming mold of this utility model has a short forming cycle, a high degree of automation, good consistency, and net size forming, and no CNC trimming and other processing procedures are required. The double-sided mold ensures that both sides of the product are smooth and flat;

[0024] 3. The rear floor reinforcement plate formed by the forming mold and forming method of the utility model is light in weight, high in strength, and resistant to vibration and corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the upper die of the net size forming die for the composite material rear bottom plate reinforcement plate provided by the present invention;

[0026] Figure 2 The utility model is a structural schematic diagram of the lower die of the net size forming die of the composite material rear bottom plate reinforcement plate provided by the present invention.

[0027] In the figure: 10, upper mold; 11, upper base plate; 12, upper support plate; 13, upper mold body; 14, upper ejector pin; 15, upper heat shield; 16, upper thermocouple; 17, upper heating oil circulation channel; 18, upper ejector pin hole; 19, upper mold guide pin hole; 110, upper ejector cylinder;

[0028] 20. Lower mold; 21. Lower base plate; 22. Lower support plate; 23. Lower mold body; 24. Lower ejector; 25. Lower heat insulation plate; 26. Lower thermocouple; 27. Lower heating oil circulation channel; 28. Lower ejector hole; 29. ​​Lower mold guide pillar; 210. Lower ejector cylinder. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In addition, the features, operations, and characteristics described in this specification may be combined in any appropriate manner to form various embodiments. Similarly, the steps or actions described in the method may be reordered in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided for clarity of description of a particular embodiment and are not mandatory unless otherwise specified.

[0033] Example 1

[0034] The utility model provides a composite material rear floor reinforcement plate net size forming die, please refer to Figure 1 and Figure 2 , including an upper mold 10 and a lower mold 20, a concave mold is opened in the upper mold 10, and a punch is opened in the lower mold 20. When the upper mold 10 and the lower mold 20 are closed, the composite material rear bottom plate reinforcement plate is formed in the mold cavity under the action of the punch and the concave mold.

[0035] The upper mold 10 includes an upper base plate 11, an upper support plate 12, an upper mold body 13, an upper ejector pin 14, an upper heat insulation plate 15 and an upper thermocouple 16; wherein, an upper heating oil circulation channel 17 is horizontally opened in the upper mold 10, and an upper ejector pin hole 18 is vertically opened; upper mold guide column holes 19 are opened at the four corners of the upper mold 10.

[0036] The lower mold 20 includes a lower base plate 21, a lower support plate 22, a lower mold body 23, a lower ejector 24, a lower heat insulation plate 25 and a lower thermocouple 26; wherein, a lower heating oil circulation channel 27 is horizontally opened in the lower mold 20, and a lower ejector hole 28 is vertically opened; lower mold guide columns 29 are opened at the four corners of the lower mold 20.

[0037] Specifically, the upper base plate 11 and the lower base plate 21 are both provided with mounting grooves, and bolts are used to connect and fix them to the press through the mounting grooves.

[0038] Specifically, the upper support plate 12 includes four pieces, distributed in the front, back, left and right of the upper support plate 12, for connecting the upper base plate 11 and the upper mold body 13; the lower support plate 22 includes four pieces, distributed in the front, back, left and right of the lower support plate 22, for connecting the lower base plate 21 and the lower mold body 23.

[0039] Specifically, the upper heating oil circulation channel 17 is opened and circulated in the upper mold body 13, and the heating oil flows through the upper heating oil circulation channel 17, thereby heating the upper mold body 13; the lower heating oil circulation channel 27 is opened and circulated in the lower mold body 23, and the heating oil flows through the lower heating oil circulation channel 27, thereby heating the lower mold body 23.

[0040] Specifically, an upper thermocouple mounting hole is provided in the upper mold body 13 for installing the upper thermocouple 16 to monitor the temperature of the upper mold body 13; a lower thermocouple mounting hole is provided in the lower mold body 23 for installing the lower thermocouple 26 to monitor the temperature of the lower mold body 23.

[0041] Specifically, the upper ejector 14 is connected to the upper ejector cylinder 110, and under the action of the upper ejector cylinder 110, the upper ejector 14 is driven to perform ejection or retraction movement along the upper ejector hole 18; the lower ejector 24 is connected to the lower ejector cylinder 210, and under the action of the lower ejector cylinder 210, the lower ejector 24 is driven to perform ejection or retraction movement along the lower ejector hole 28; when molding the composite material rear bottom plate reinforcement plate, the upper ejector 14 and the lower ejector 24 are both in the ejection state to prevent the composite material from flowing into the ejector hole; when molding is completed, the upper ejector 14 and the lower ejector 24 are both in the retraction state, and compressed air passes through the upper ejector hole 18 and the lower ejector hole 28 to separate the molded composite material rear bottom plate reinforcement plate from the mold body.

[0042] Specifically, the upper heat insulation board 15 covers the four sides of the upper mold body 13 to isolate the heat of the upper mold body 13 and prevent burns; the lower heat insulation board 25 covers the four sides of the lower mold body 23 to isolate the heat of the lower mold body 23 and prevent burns.

[0043] Specifically, the upper mold guide post hole 19 cooperates with the lower mold guide post 29 to ensure that the upper mold 10 and the lower mold 20 are accurately clamped.

[0044] A method for forming a composite rear floor reinforcement plate using a net-size forming die comprises the following steps:

[0045] S1: Material preparation: Cut the prepreg using a cutting machine according to the cutting diagram, including +25° unidirectional tape prepreg, -25° unidirectional tape prepreg, 12K prepreg (0° / 90°), and 12K prepreg (±45°). The angle is the cutting angle direction of the unidirectional UD material (the fiber direction is 0°).

[0046] S2: Preform: stack the sheets together according to the layer: Where S represents its symmetrical laying method; 12k+45°, 12k-45°, unidirectional +25°, unidirectional -25°, 12k 0°, 12k 90°, 12k90°, 12k 0°, unidirectional -25°, unidirectional +25°, 12k -45°, 12k+45°.

[0047] S3: Raise the temperature of the mold temperature controller to 150°C and use a lead bar to adjust the mold cavity thickness to between 2.7mm and 2.8mm.

[0048] S4: Introduce the mold cleaning agent into the lower mold 20, and close the upper mold 10 and the lower mold 20 for 10 minutes, then open the upper mold 10 and the lower mold 20, and use a dust-free cloth and a scouring pad to clean the mold;

[0049] S5: Use a spray bottle to evenly spray the release agent into the cavity of the upper mold 10 and the lower mold 20, spraying 3 times with an interval of 10 minutes between each spraying.

[0050] S6: Tear off the outermost protective film of the pre-formed blank, place the blank into the mold that has been sprayed with release agent, and then start the press to press down, set the pressure to 160T, and keep the heat and pressure for 600s;

[0051] S7: After the heat preservation and pressure holding time is over, the press automatically opens the mold;

[0052] S8: After the mold is opened, the upper ejector pin 14 and the lower ejector pin 24 automatically retract, and the compressed air switch automatically turns on. The compressed air passes through the upper ejector pin hole 18 and the ejector pin hole 28 to separate the rear floor reinforcement plate from the mold, and then the product is removed from the mold;

[0053] S9: Use sandpaper and files to grind off the flash of the product;

[0054] S10: Use CNC machine tools to punch the mounting holes of the product.

[0055] The above description is only a description of the preferred embodiment of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A net size forming die for a composite rear floor reinforcement plate, characterized in that: The invention comprises an upper mold (10) and a lower mold (20), wherein a concave mold is provided in the upper mold (10) and a convex mold is provided in the lower mold (20), and when the upper mold (10) and the lower mold (20) are closed, a composite material rear bottom plate reinforcement plate is formed in the mold cavity under the action of the convex mold and the concave mold; The upper mold (10) comprises an upper base plate (11), an upper support plate (12), an upper mold body (13), an upper ejector pin (14), an upper heat insulation plate (15) and an upper thermocouple (16); Wherein, an upper heating oil circulation channel (17) is horizontally opened in the upper mold (10), and an upper ejector pin hole (18) is vertically opened; upper mold guide post holes (19) are opened at the four corners of the upper mold (10); The lower mold (20) includes a lower base plate (21), a lower support plate (22), a lower mold body (23), a lower ejector pin (24), a lower heat insulation plate (25) and a lower thermocouple (26); A lower heating oil circulation channel (27) is horizontally opened in the lower die (20), and a lower ejector pin hole (28) is vertically opened. Lower die guide pillars (29) are opened at the four corners of the lower die (20).

2. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: The upper base plate (11) and the lower base plate (21) are both provided with mounting grooves, and are connected and fixed to the press by bolts through the mounting grooves.

3. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: The upper support plate (12) includes four pieces, which are distributed on the front, back, left and right sides of the upper support plate (12) and are used to connect the upper base plate (11) and the upper mold body (13); The lower support plate (22) includes four pieces, which are distributed at the front, back, left and right of the lower support plate (22) and are used to connect the lower base plate (21) and the lower mold body (23).

4. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: The upper heating oil circulation channel (17) is circulated in the upper mold body (13), and heating oil flows through the upper heating oil circulation channel (17), thereby heating the upper mold body (13); The lower heating oil circulation channel (27) is opened and circulated in the lower mold body (23), and the heating oil flows through the lower heating oil circulation channel (27), thereby heating the lower mold body (23).

5. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: An upper thermocouple mounting hole is provided in the upper mold body (13) for mounting the upper thermocouple (16) to monitor the temperature of the upper mold body (13); A lower thermocouple mounting hole is provided in the lower mold body (23) for mounting the lower thermocouple (26) to monitor the temperature of the lower mold body (23).

6. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: The upper ejector pin (14) is connected to the upper ejector pin oil cylinder (110), and under the action of the upper ejector pin oil cylinder (110), the upper ejector pin (14) is driven to perform ejection or retraction movement along the upper ejector pin hole (18); The lower ejector pin (24) is connected to the lower ejector pin oil cylinder (210), and under the action of the lower ejector pin oil cylinder (210), the lower ejector pin (24) is driven to perform ejection or retraction movement along the lower ejector pin hole (28); When molding a composite material rear bottom plate reinforcement plate, the upper ejector pin (14) and the lower ejector pin (24) are both in an ejection state to prevent the composite material from flowing into the ejector pin hole; when molding is completed, the upper ejector pin (14) and the lower ejector pin (24) are both in a retracted state, and compressed air passes through the upper ejector pin hole (18) and the lower ejector pin hole (28) to separate the molded composite material rear bottom plate reinforcement plate from the mold body.

7. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: The upper heat insulation board (15) covers the four sides of the upper mold body (13) to insulate the heat of the upper mold body (13); the lower heat insulation board (25) covers the four sides of the lower mold body (23) to insulate the heat of the lower mold body (23).

8. The net size forming die for a composite rear floor reinforcement plate according to claim 1, characterized in that: The upper die guide post hole (19) and the lower die guide post (29) cooperate with each other to ensure that the upper die (10) and the lower die (20) are accurately clamped.

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