A positioning and clamping device and method for composite material flat prepreg blanks

Abstract

This invention discloses a positioning and clamping device and method for composite material flat prepreg blanks, including a front clamping mechanism cylinder, a screw-slide lifting mechanism, and a worktable. The screw-slide lifting mechanism is fixed on the worktable and is connected to the front clamping mechanism via the slide to control its lifting movement. The front clamping mechanism uses a cylinder to push a push rod forward, which is connected by an auxiliary rod to achieve the downward pressing of the front pressure head and the clamping of the support rod. When the molding device reaches the clamping point, the cylinder push rod retracts, and the auxiliary rod drives the front pressure head to lift, causing the support plate to retract, thus not affecting the molding process. This device has a compact structure, strong applicability, and can effectively ensure the positioning and clamping of flat prepreg blanks during the molding process, improving the efficiency of continuous rolling of composite material stringers.

Description

Technical Field

[0001] This invention relates to the field of automated manufacturing technology of aerospace composite materials, and in particular to a positioning and clamping device and method for composite material flat prepreg blanks. Background Technology

[0002] Composite stringers are a common structural component in aircraft, with lengths exceeding 20 meters. Common configurations include U-shaped, T-shaped, I-shaped, L-shaped, and cap-shaped. The manufacturing process of composite stringers is complex, requiring multiple molding steps such as lamination, preforming, and curing. Currently, the most common molding process is manual lamination, which is labor-intensive, has low molding efficiency, and cannot guarantee the stability and consistency of molding quality. Therefore, new composite stringer molding processes are constantly being proposed.

[0003] Composite material roll forming technology is a rapidly developing stringer forming process. The forming method involves a robot driving a contouring mold roller head to continuously roll or slide along the length of the stringer mold, causing a pre-placed composite material flat prepreg blank to gradually deform under pressure, thus forming stringer preforms with various cross-sections. Currently, in the automated forming equipment for this process, the positioning and clamping of the flat prepreg blank are not adequately considered during placement, resulting in inaccurate positioning and clamping along the fiber direction and low process efficiency.

[0004] Because composite material stringers come in a wide variety of types and lengths / sections, the positioning height, length, and width dimensions corresponding to different molds also vary, placing demands on the positioning and clamping device for flat prepreg blanks. During roll forming, it is necessary to position composite material flat prepreg blanks with relatively long lengths. The clamping device needs to operate on platforms at different heights and be adjustable in width to ensure that it remains clamped before the forming device begins forming, and releases and retracts during forming without affecting the forming process of the composite material, thereby improving the efficiency and quality of automated stringer forming. Summary of the Invention

[0005] To address the problem of difficulty in clamping and positioning composite flat prepreg blanks during automated roll forming of composite stringers / beams, this invention provides a positioning and clamping device and method for composite flat prepreg blanks. This device has the function of positioning and clamping composite flat blanks of different lengths, heights, and widths. The device is easy to operate, accurate in positioning, and widely applicable, and can improve the forming accuracy of composite stringers, thereby realizing high-efficiency automated manufacturing of composite stringers.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A positioning and clamping device for composite material flat prepreg blanks includes a front clamping mechanism, a screw slide lifting mechanism, and a worktable; the screw slide lifting mechanism is mounted on the worktable. The front clamping mechanism is mounted on the lead screw slide table motion lifting mechanism; The aforementioned front clamping mechanism includes a cylinder, a guide groove, a push rod, a first auxiliary rod, a second auxiliary rod, a front pressure head, a third auxiliary rod, a cover plate, a fourth auxiliary rod, and a support rod; The push rod is set in the guide groove, the cover plate is fixed on one side of the guide groove, the bottom end of the push rod is connected to the cylinder, the top end of the push rod is connected to one end of the second auxiliary rod, the other end of the second auxiliary rod is connected to the front pressure head, one end of the first auxiliary rod is set on the cover plate, the other end is set in the middle of the second auxiliary rod, one end of the third auxiliary rod is connected to the front pressure head, the other end is set on the cover plate, one end of the fourth auxiliary rod is connected to the bottom end of the push rod, the other end is set on the support rod, and one end of the support rod is connected to the cover plate.

[0007] Furthermore, the cylinder movement drives the push rod to move forward or backward. The push rod is connected to the first auxiliary rod, the second auxiliary rod, and the third auxiliary rod to press down or lift the front pressure head. At the same time, the push rod is connected to the support rod through the fourth auxiliary rod, causing the support rod to extend forward and retract backward. When the support rod extends forward and the front pressure head presses down, it cooperates to clamp the composite material flat blank, realizing that one cylinder completes the clamping action.

[0008] Furthermore, when the front clamping mechanism is in the clamping state, the cylinder pushes the push rod forward, and the first auxiliary rod, the second auxiliary rod, and the third auxiliary rod cause the front pressure head to press down, while the support rod extends forward. The front pressure head and the support rod cooperate to clamp the composite material flat blank.

[0009] Furthermore, when the front clamping mechanism is in the released state, the cylinder drives the push rod to retract, and the first auxiliary rod, the second auxiliary rod, and the third auxiliary rod lift the front pressure head and simultaneously retract the support rod, without affecting the molding process. The front pressure head and the support rod cooperate to release the composite material planar blank.

[0010] Furthermore, the support rod is equipped with multiple positioning blocks, which are used to position the composite material planar blank in the width direction. The positioning blocks are in point contact or line contact with the side of the composite material planar blank.

[0011] Furthermore, the aforementioned ball screw slide lifting mechanism includes a stepper motor, a coupling, a guide shaft, a base plate, a ball screw mechanism, and a slide. The stepper motor is mounted on a base plate, and a fixing component is mounted on the base plate. The guide shaft and the ball screw mechanism are mounted on the fixing component. The output shaft of the stepper motor is connected to a coupling, which is connected to the ball screw mechanism. Guide shafts are provided on both sides of the ball screw mechanism, and the guide shafts on both sides of the ball screw mechanism are arranged in parallel. A slide is mounted on the ball screw mechanism and the guide shafts and can slide along the ball screw mechanism and the guide shafts. The slide has through holes for fixing the slide to the base plate. A cylinder is mounted on the slide.

[0012] Furthermore, the workbench includes a back support plate, a bottom support plate, a workbench bracket, and a hat-shaped mold; The workbench support has several bottom support plates on both sides of its top surface, a hat-shaped mold on its top surface, and a composite material flat blank on the hat-shaped mold; the screw slide lifting mechanism is fixed to the back support plate.

[0013] Furthermore, a guide groove is provided at the connection between the back support plate and the bottom support plate.

[0014] A method for positioning and clamping a composite prepreg blank includes the following steps: The lead screw slide lifting mechanism is fixed to one side of the worktable, and the slide is connected to the cylinder to realize the up and down positioning control of the front clamping mechanism. The lead screw slide lifting mechanism is fixed to the worktable, and then the front clamping mechanism is connected to the slide. When clamping, the lead screw slide lifting mechanism drives the slide to move up and down along the guide shaft through the stepper motor. The front clamping mechanism pushes the push rod to the cover plate through the cylinder. The support rod extends forward and the front pressure head presses down through the first auxiliary rod, the second auxiliary rod, the third auxiliary rod and the fourth auxiliary rod, thereby clamping the composite material flat blank.

[0015] Furthermore, when the cylinder pulls the push rod backward, the first auxiliary rod, the second auxiliary rod, the third auxiliary rod, and the fourth auxiliary rod drive the front pressure head to lift and the support plate to retract, thereby releasing the composite material planar blank.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention employs a front-end clamping mechanism and a lead screw slide lifting mechanism. The front-end clamping mechanism utilizes a hinge mechanism to move a cylinder, achieving two actions: the downward pressing of the front pressure head and the extension of the support rod. These two components work together to provide support and clamping, while a cover plate provides limiting. When the molding device reaches the clamping point, the front pressure head can be raised and the support rod retracted without affecting the molding process. The lead screw slide lifting mechanism allows the front-end clamping mechanism to be adjusted according to the height of the worktable, enabling it to be positioned and operated at any height. This invention has high compatibility and can be used for clamping and supporting most planar blank materials requiring positioning during processing. Its simple structure meets usage requirements and improves the efficiency and quality of composite material stringer molding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a positioning and clamping device for a composite material flat prepreg blank; Figure 2 This is a schematic diagram of the clamping state structure of the front clamping mechanism; Figure 3 This is a schematic diagram of the front clamping mechanism in the released state. Figure 4 This is a schematic diagram of the screw slide lifting mechanism. Figure 5 This is a schematic diagram of the workbench; Figure 6 This is a schematic diagram of the operation of the positioning and clamping device for composite material flat prepreg blanks; Figure 7 This is a schematic diagram showing the connection between the back support plate and the bottom support plate guide groove; Explanation of numbering in the diagram 1 is the front clamping mechanism, 2 is the lead screw slide table motion lifting mechanism, 3 is the worktable, 4 is the first positioning clamping device, 5 is the second positioning clamping device, 6 is the third positioning clamping device, 7 is the fourth positioning clamping device, 8 is the fifth positioning clamping device, and 9 is the sixth positioning clamping device. 1-1 is a cylinder, 1-2 is a guide groove, 1-3 is a push rod, 1-4 is a first auxiliary rod, 1-5 is a second auxiliary rod, 1-6 is a front pressure head, 1-7 is a third auxiliary rod, 1-8 is a cover plate, 1-9 is a fourth auxiliary rod, 1-10 is a support rod, 1-11 is a positioning block, 2-1 is a stepper motor, 2-2 is a coupling, 2-3 is a guide shaft, 2-4 is a base plate, 2-5 is a ball screw mechanism, 2-6 is a slide table, 3-1 is a back support plate, 3-2 is a bottom support plate, 3-3 is a worktable bracket, 3-4 is a hat-shaped mold, and 3-5 is a composite material flat blank. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0019] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0020] See Figure 1 The composite material flat prepreg blank positioning and clamping device of the present invention includes: a front clamping mechanism 1, a screw slide lifting mechanism 2, and a worktable 3; the screw slide lifting mechanism 2 is disposed on the worktable 3. The front clamping mechanism 1 is disposed on the screw slide lifting mechanism 2, and the screw slide lifting mechanism 2 is used to adjust the vertical position of the front clamping mechanism 1, so that the clamping device can work at different heights. At the same time, multiple clamping devices are used in combination, which can work on composite material flat blanks 3-5 with different lengths and widths.

[0021] See Figure 2 and Figure 3 The front clamping mechanism 1 is composed of a cylinder 1-1, a guide groove 1-2, a push rod 1-3, a first auxiliary rod 1-4, a second auxiliary rod 1-5, a front pressure head 1-6, a third auxiliary rod 1-7, a cover plate 1-8, a fourth auxiliary rod 1-9, and a support rod 1-10.

[0022] Among them, the bottom end of push rod 1-3 is connected to cylinder 1-1, one end of the first auxiliary rod 1-4 is connected to cover plate 1-8, and the other end is connected to the middle of the second auxiliary rod 1-5. The two ends of the second auxiliary rod 1-5 are respectively connected to the front pressure head 1-6 and push rod 1-3, the two ends of the third auxiliary rod 1-7 are respectively connected to the front pressure head 1-6 and cover plate 1-8, one end of the fourth auxiliary rod 1-9 is connected to the bottom end of push rod 1-3, and the other end is connected to support rod 1-10. The end of support rod 1-10 is connected to cover plate 1-8. Push rod 1-3 is set in guide groove 1-2, and cover plate 1-8 is fixed on one side of guide groove 1-2.

[0023] The movement of cylinder 1-1 drives push rod 1-3 to move forward or backward. Push rod 1-3 is connected to the first auxiliary rod 1-4, the second auxiliary rod 1-5, and the third auxiliary rod 1-7, causing the front pressure head 1-6 to press down or lift. At the same time, push rod 1-3 is connected to support rod 1-10 through the fourth auxiliary rod 1-9, causing support rod 1-10 to extend forward and retract backward. When support rod 1-10 extends forward and front pressure head 1-6 presses down, it cooperates to clamp the composite material flat blank 3-5, realizing the clamping action completed by one cylinder 1-1. Meanwhile, cover plate 1-8 acts as a limit for push rod 1-3 during operation.

[0024] Cylinder 1-1 pushes push rod 1-3 to extend support rod 1-10, thereby supporting composite material flat blank 3-5. At the same time, push rod 1-3 also drives front pressure head 1-6 to press down, which works in conjunction with support rod 1-10 to clamp. By using a single forward push action to achieve both pressing down and extending forward actions for clamping, the number of driving parts can be reduced, thus lowering costs.

[0025] like Figure 2 As shown, when the front clamping mechanism 1 is in the clamping state, the cylinder 1-1 pushes the push rod 1-3 forward, and the first auxiliary rod 1-4, the second auxiliary rod 1-5, and the third auxiliary rod 1-7 cause the front pressure head 1-6 to press down, while the support rod 1-10 extends forward. The front pressure head 1-6 and the support rod 1-10 cooperate to clamp the composite material flat blank 3-5.

[0026] like Figure 3 As shown, when the front clamping mechanism is in the loose state, the forming device forms to the clamping position, and the cylinder 1-1 drives the push rod 1-3 to retract. The first auxiliary rod 1-4, the second auxiliary rod 1-5, and the third auxiliary rod 1-7 raise the front pressure head 1-6 and at the same time retract the support rod 1-10 without affecting the forming process. The front pressure head 1-6 and the support rod 1-10 cooperate to loosen the composite material flat blank 3-5.

[0027] Meanwhile, when placing the composite material flat blank 3-5, the cover plate 1-8 serves as a limiting device.

[0028] See Figure 2 and Figure 3 The support rod 1-10 is equipped with multiple positioning blocks 1-11. The positioning blocks 1-11 are used to position the composite material planar blank 3-5 in the width direction. The positioning blocks 1-11 and the side of the composite material planar blank 3-5 are in point contact or line contact. By arranging multiple positioning blocks 1-11, the accurate positioning of the composite material planar blank 3-5 can be achieved.

[0029] See Figure 4 The aforementioned ball screw slide lifting mechanism 2 is composed of a stepper motor 2-1, a coupling 2-2, a guide shaft 2-3, a base plate 2-4, a ball screw mechanism 2-5, and a slide 2-6.

[0030] The stepper motor 2-1 is mounted on the base plate 2-4, which has a fixing component. The guide shaft 2-3 and the ball screw mechanism 2-5 are mounted on the fixing component. The output shaft of the stepper motor 2-1 is connected to the coupling 2-2, which in turn is connected to the ball screw mechanism 2-5. Guide shafts 2-3 are located on both sides of the ball screw mechanism 2-5, arranged parallel to each other. A slide 2-6 is mounted on the ball screw mechanism 2-5 and the guide shafts 2-3, and can slide along these components. The slide 2-6 has through holes for fixing it to the base plate 2-4. A cylinder 1-1 is mounted on the slide 2-6.

[0031] Under the control of stepper motor 2-1, slide table 2-6 can achieve lifting and lowering movement. Slide table 2-6 is connected to front clamping mechanism 1, ensuring that front clamping mechanism 1 can work at any height.

[0032] See Figure 5 The workbench 3 comprises a back support plate 3-1, a bottom support plate 3-2, a workbench bracket 3-3, a hat-shaped mold 3-4, and a composite material flat blank 3-5. Several bottom support plates 3-2 are provided on both sides of the top surface of the workbench bracket 3-3. The hat-shaped mold 3-4 is provided on the top surface of the workbench bracket 3-3, and the composite material flat blank 3-5 is provided on the hat-shaped mold 3-4. The base plate 2-4 is fixed to the back support plate 3-1.

[0033] See Figure 7 The connection between the back support plate 3-1 and the bottom support plate 3-2 is provided with a guide groove. Specifically, the guide groove is provided on the bottom support plate 3-2, and a protrusion is provided on the bottom surface of the back support plate 3-1. The protrusion can be stuck in the guide groove. The back support plate 3-1 moves along the guide groove to clamp blanks of different widths, thereby realizing the positioning and clamping work of different composite material planar blanks 3-5 with different widths.

[0034] See Figure 6 The composite material flat prepreg blank positioning and clamping device consists of a front clamping mechanism 1, a screw slide lifting mechanism 2, and a worktable 3. The screw slide lifting mechanism 2 is fixed on the back support plate 3-1, and the bottom support plate 3-2 connects the back support plate 3-1 and the worktable bracket 3-3.

[0035] Multiple positioning and clamping devices are installed on the workbench support 3-3, including a first positioning and clamping device 4, a second positioning and clamping device 5, a third positioning and clamping device 6, a fourth positioning and clamping device 7, a fifth positioning and clamping device 8, and a sixth positioning and clamping device 9. The first positioning and clamping devices 4, 6, and 8 are located on one side of the workbench 3, and the second, 7, and 9 are located on the other side. Furthermore, the first and second positioning and clamping devices 4 and 5 are symmetrically arranged, the third and fourth positioning and clamping devices 6 and 7 are symmetrically arranged, and the fifth and sixth positioning and clamping devices 8 and 9 are symmetrically arranged.

[0036] During operation, the first positioning clamping device 4 works in conjunction with the second positioning clamping device 5; the third positioning clamping device 6 works in conjunction with the fourth positioning clamping device 7; and the fifth positioning clamping device 8 works in conjunction with the sixth positioning clamping device 9. When the molding device reaches the position of the first positioning clamping device 4 and the second positioning clamping device 5, the release of the first positioning clamping device 4 and the second positioning clamping device 5 does not affect the molding process, while the remaining positioning clamping devices remain in position to prevent the composite material flat blank 3-5 from deviating during the molding process. The use of multiple positioning clamping devices in conjunction allows for positioning and clamping at different lengths.

[0037] The working process of the composite material flat prepreg blank positioning and clamping device is as follows: The lead screw slide lifting mechanism 2 is fixed to one side of the worktable 3. The slide 2-6 is connected to the cylinder 1-1 to realize the up and down positioning control of the front clamping mechanism. First, the lead screw slide lifting mechanism 2 is connected and fixed to the worktable 3 through the through hole reserved on the base plate 2-4. Then, the front clamping mechanism 1 is connected to the slide 2-6. In the working process, the lead screw slide lifting mechanism 2 drives the slide 2-6 to move up and down along the guide shaft 2-3 through the stepper motor 2-1. The front clamping mechanism 1 pushes the push rod 1-3 to the cover plate 1-8 through the cylinder 1-1. The push rod 1-3 is connected to the first auxiliary rod 1-4, the second auxiliary rod 1-5, the third auxiliary rod 1-7 and the fourth auxiliary rod 1-9 to realize the forward extension of the support rod 1-10 and the downward pressing of the front pressure head 1-6 to clamp the composite material flat blank 3-5, thereby realizing the support and clamping work in the molding process of the composite material flat blank 3-5. When cylinder 1-1 pulls push rod 1-3 backward, the connected first auxiliary rod 1-4, second auxiliary rod 1-5, third auxiliary rod 1-7 and fourth auxiliary rod 1-9 drive the front pressure head 1-6 to lift and the support rod 1-10 to retract, thereby releasing the composite material flat blank 3-5 without affecting the molding process.

[0038] The above description is only of the preferred embodiment of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All variations made within the scope of the independent claims of the present invention are also within the scope of protection of the present invention.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A positioning and clamping device for composite material flat prepreg blanks, characterized in that, It includes a front clamping mechanism (1), a screw slide table motion lifting mechanism (2), and a worktable (3); the screw slide table motion lifting mechanism (2) is set on the worktable (3); Among them, the front clamping mechanism (1) is set on the screw slide table motion lifting mechanism (2); The front clamping mechanism (1) includes a cylinder (1-1), a guide groove (1-2), a push rod (1-3), a first auxiliary rod (1-4), a second auxiliary rod (1-5), a front pressure head (1-6), a third auxiliary rod (1-7), a cover plate (1-8), a fourth auxiliary rod (1-9), and a support rod (1-10). Among them, the push rod (1-3) is set in the guide groove (1-2), the cover plate (1-8) is fixed on one side of the guide groove (1-2), the bottom end of the push rod (1-3) is connected to the cylinder (1-1), the top end of the push rod (1-3) is connected to one end of the second auxiliary rod (1-5), the other end of the second auxiliary rod (1-5) is connected to the front pressure head (1-6), one end of the first auxiliary rod (1-4) is set on the cover plate (1-8), and the other end is set in the middle of the second auxiliary rod (1-5), one end of the third auxiliary rod (1-7) is connected to the front pressure head (1-6), and the other end is set on the cover plate (1-8), one end of the fourth auxiliary rod (1-9) is connected to the bottom end of the push rod (1-3), and the other end is set on the support rod (1-10), and one end of the support rod (1-10) is connected to the cover plate (1-8); The cylinder (1-1) moves, driving the push rod (1-3) to move forward or backward. The push rod (1-3) is connected through the first auxiliary rod (1-4), the second auxiliary rod (1-5), and the third auxiliary rod (1-7) to press down or lift the front pressure head (1-6). At the same time, the push rod (1-3) is connected through the fourth auxiliary rod (1-9) to the support rod (1-10), causing the support rod (1-10) to extend forward and retract backward. When the support rod (1-10) extends forward and the front pressure head (1-6) presses down, it cooperates to clamp the composite material flat blank (3-5), realizing the clamping action completed by one cylinder (1-1). When the front clamping mechanism (1) is in the clamping state, the cylinder (1-1) pushes the push rod (1-3) forward, and the first auxiliary rod (1-4), the second auxiliary rod (1-5), and the third auxiliary rod (1-7) press down the front pressure head (1-6), while the support rod (1-10) extends forward. The front pressure head (1-6) and the support rod (1-10) cooperate to clamp the composite material flat blank (3-5).

2. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that, When the front clamping mechanism is in the released state, the cylinder (1-1) drives the push rod (1-3) to retract, and the first auxiliary rod (1-4), the second auxiliary rod (1-5), and the third auxiliary rod (1-7) lift the front pressure head (1-6) and at the same time retract the support rod (1-10), without affecting the molding process. The front pressure head (1-6) and the support rod (1-10) cooperate to release the composite material flat blank (3-5).

3. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that, The support rod (1-10) is provided with multiple positioning blocks (1-11). The positioning blocks (1-11) are used to position the composite material planar blank (3-5) in the width direction. The positioning blocks (1-11) and the side of the composite material planar blank (3-5) are in point contact or line contact.

4. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that, The aforementioned screw slide lifting mechanism (2) includes a stepper motor (2-1), a coupling (2-2), a guide shaft (2-3), a base plate (2-4), a ball screw mechanism (2-5), and a slide (2-6). The stepper motor (2-1) is mounted on the base plate (2-4), and a fixing member is mounted on the base plate (2-4). The guide shaft (2-3) and the ball screw mechanism (2-5) are mounted on the fixing member. The output shaft of the stepper motor (2-1) is connected to the coupling (2-2), and the coupling (2-2) is connected to the ball screw mechanism (2-5). The guide shafts (2-3) are mounted on both sides of the ball screw mechanism (2-5), and the guide shafts (2-3) are arranged in parallel on both sides of the ball screw mechanism (2-5). The slide (2-6) is mounted on the ball screw mechanism (2-5) and the guide shafts (2-3), and can slide along the ball screw mechanism (2-5) and the guide shafts (2-3). The slide (2-6) is provided with a through hole for fixing the slide (2-6) on the base plate (2-4). The cylinder (1-1) is mounted on the slide (2-6).

5. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that, The workbench (3) includes a back support plate (3-1), a bottom support plate (3-2), a workbench bracket (3-3), and a hat-shaped mold (3-4). Among them, the top surface of the workbench support (3-3) is provided with several bottom support plates (3-2) on both sides, the top surface of the workbench support (3-3) is provided with a hat-shaped mold (3-4), and the hat-shaped mold (3-4) is provided with a composite material flat blank (3-5); the screw slide table motion lifting mechanism (2) is fixed on the back support plate (3-1).

6. The composite material flat prepreg blank positioning and clamping device according to claim 5, characterized in that, A guide groove is provided at the connection between the back support plate (3-1) and the bottom support plate (3-2).

7. A method for positioning and clamping composite material flat prepreg blanks based on the device described in claim 4, characterized in that, Includes the following steps: The lead screw slide lifting mechanism (2) is fixed on one side of the worktable (3), and the slide (2-6) and the cylinder (1-1) are connected to realize the up and down positioning control of the front clamping mechanism; The screw slide table motion lifting mechanism (2) is fixed to the worktable (3), and then the front clamping mechanism (1) is connected to the slide table (2-6). When clamping, the screw slide table motion lifting mechanism (2) drives the slide table (2-6) to move up and down along the guide shaft (2-3) through the stepper motor (2-1). The front clamping mechanism (1) pushes the push rod (1-3) to the cover plate (1-8) through the cylinder (1-1). The support rod (1-10) extends forward and the front pressure head (1-6) presses down through the first auxiliary rod (1-4), the second auxiliary rod (1-5), the third auxiliary rod (1-7) and the fourth auxiliary rod (1-9), thereby clamping the composite material flat blank (3-5).

8. The method for positioning and clamping composite material flat prepreg blanks according to claim 7, characterized in that, When the cylinder (1-1) pulls the push rod (1-3) backward, the first auxiliary rod (1-4), the second auxiliary rod (1-5), the third auxiliary rod (1-7) and the fourth auxiliary rod (1-9) drive the front pressure head (1-6) to lift and the support rod (1-10) to retract, thereby releasing the composite material planar blank (3-5).

Images