Composite material flat plate prepreg blank positioning and clamping device and method

Abstract

The invention discloses a composite flat prepreg blank positioning and clamping device and method. The composite flat prepreg blank positioning and clamping device comprises a front end clamping mechanism air cylinder, a lead screw sliding table movement lifting mechanism and a workbench. The lead screw sliding table motion lifting mechanism is fixed to the workbench and connected with the front end clamping mechanism through a sliding table to control the front end clamping mechanism to ascend and descend. The front-end clamping mechanism pushes a push rod forwards through an air cylinder and realizes downward pressing of a front pressing head and matched clamping of a supporting rod through connection of an auxiliary rod; when the forming device is formed to a clamping position, the air cylinder push rod retracts, the auxiliary rod drives the front pressing head to be lifted up, the supporting plate retracts backwards, and therefore the forming process is not affected. The device is compact in structure and high in applicability, positioning and clamping of the flat prepreg blank in the forming process can be effectively guaranteed, and the continuous rolling efficiency of the composite stringer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automated manufacturing of aviation composite materials, and in particular to a positioning and clamping device and method for a composite material flat plate prepreg blank. Background Art

[0002] Composite stringers are commonly used structural components on aircraft, reaching lengths exceeding 20 meters. Common configurations include U-shaped, T-shaped, I-shaped, L-shaped, and cap-shaped. The manufacturing process for composite stringers is complex, requiring multiple steps including laying, preforming, and curing. Currently, the most commonly used forming process involves manual laying, which is labor-intensive, inefficient, and lacks guaranteed quality stability and consistency. Consequently, new composite stringer forming processes are constantly being proposed.

[0003] Composite roll forming technology is a rapidly developing long-beam forming process. This process involves a robot driving a contoured mold roller to continuously roll or slide along the length of the long-beam mold, gradually deforming a pre-placed composite flat prepreg blank under pressure to form long-beam preforms of various profiled cross-sections. Currently, the automated forming equipment used to implement this forming process fails to adequately consider the positioning and clamping of the flat prepreg blank during placement. This results in the inability to accurately position and clamp the flat prepreg along the fiber direction, leading to low forming process efficiency.

[0004] Due to the wide variety of composite stringers and their varying lengths and cross-sections, different molds correspond to different positioning heights, lengths, and widths, placing demands on the positioning and clamping devices for the flat prepreg blanks. During the roll-forming process, the long composite flat prepreg blanks need to be positioned. The clamping device needs to operate on platforms at different heights and be adjustable in width. This ensures that the clamping device can remain clamped before the forming device forms the composite material, and can be released and withdrawn during forming without affecting the forming device's composite material forming process, thereby improving the efficiency and quality of the automated stringer forming process. Summary of the Invention

[0005] In order to solve the problem that composite material flat plate prepreg blanks are difficult to clamp and position during the automated roll forming process of composite material long stringers / beams, the present invention provides a composite material flat plate prepreg blank positioning and clamping device and method. The device has the function of positioning and clamping composite material flat blanks of different lengths, heights and widths. The device is easy to operate, accurately positions, and has a wide range of applications. It can improve the forming accuracy of composite material long stringers, thereby realizing high-efficiency automated manufacturing of composite material long stringers.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A composite material flat prepreg blank positioning and clamping device comprises a front end clamping mechanism, a screw slide motion lifting mechanism and a workbench; the screw slide motion lifting mechanism is arranged on the workbench;

[0008] Among them, the front end clamping mechanism is arranged on the screw slide motion lifting mechanism;

[0009] The front end 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;

[0010] Among them, the push rod is arranged 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 arranged on the cover plate, and the other end is arranged in the middle of the second auxiliary rod, one end of the third auxiliary rod is connected to the front pressure head, and the other end is arranged on the cover plate, one end of the fourth auxiliary rod is connected to the bottom end of the push rod, and the other end is arranged on the support rod, and one end of the support rod is connected to the cover plate.

[0011] Furthermore, the movement of the cylinder drives the push rod to move forward or backward. The push rod is connected through 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 to extend the support rod forward and retreat. When the support rod extends forward and the front pressure head presses down, it cooperates to clamp the composite material flat blank, so that one cylinder can complete the clamping cooperation action.

[0012] 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 press the front pressure head downward, while extending the support rod forward, and the front pressure head and the support rod cooperate to clamp the composite material flat blank.

[0013] Furthermore, when the front-end clamping mechanism is in a loosened state, the cylinder drives the push rod to retreat, and the first auxiliary rod, the second auxiliary rod, and the third auxiliary rod lift the front pressure head and simultaneously retreat the support rod without affecting the forming process. The front pressure head and the support rod cooperate to loosen the composite material flat blank.

[0014] Furthermore, a plurality of positioning blocks are provided on the support rod, and the positioning blocks 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.

[0015] Furthermore, the screw slide motion lifting mechanism includes a stepping motor, a coupling, a guide shaft, a base plate, a ball screw mechanism and a slide;

[0016] Among them, the stepper motor is arranged on a substrate, a fixing part is provided on the substrate, and the guide shaft and the ball screw mechanism are arranged on the fixing part; the output shaft of the stepper motor is connected to the coupling, the coupling is connected to the ball screw mechanism, guide shafts are arranged on both sides of the ball screw mechanism, and the guide shafts are arranged on both sides of the ball screw mechanism in parallel, the slide is arranged on the ball screw mechanism and the guide shafts, and can slide along the ball screw mechanism and the guide shafts; the slide is provided with a through hole for fixing the slide on the substrate; the cylinder is arranged on the slide.

[0017] Furthermore, the workbench includes a back support plate, a bottom support plate, a workbench bracket and a hat-shaped mold;

[0018] Among them, several bottom support plates are arranged on both sides of the top surface of the workbench bracket, a hat-shaped mold is arranged on the top surface of the workbench bracket, and a composite material flat blank is arranged on the hat-shaped mold; the screw slide motion lifting mechanism is fixed on the back support plate.

[0019] Furthermore, a guide groove is provided at the connection between the back support plate and the bottom support plate.

[0020] A method for positioning and clamping a composite material flat prepreg blank comprises the following steps:

[0021] The screw slide motion lifting mechanism is fixed on one side of the workbench, and the slide is connected to the cylinder to realize the up and down positioning control of the front clamping mechanism;

[0022] The screw slide motion lifting mechanism is fixed to the workbench, and then the front-end clamping mechanism is connected to the slide; when clamping, the screw slide motion lifting mechanism drives the slide along the guide shaft through the stepper motor to realize lifting and lowering movement, and the front-end clamping mechanism pushes the push rod to the cover plate through the cylinder, and the support plate is extended forward and the front pressure head is pressed downward 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.

[0023] 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 rise and the support plate to retreat, thereby loosening the composite material flat blank.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention is achieved by setting up a front-end clamping mechanism and a screw slide motion lifting mechanism, wherein the front-end clamping mechanism uses a hinge mechanism to move a cylinder to realize two actions: the front pressure head pressing down and the support rod extending out. The two components cooperate to play the role of support and clamping, and the cover plate realizes the limit at the same time. When the forming device reaches the clamping position, the front pressure head can be lifted and the support rod can be withdrawn without affecting the forming process of the forming device; the screw slide motion lifting mechanism allows the front-end clamping mechanism to be adjusted with the height of the workbench, so that the front-end clamping mechanism can be positioned and worked at any height. The present invention has high compatibility and can be used for the clamping support of most flat blank materials that need to be positioned and processed. It has a simple structure and can meet the use requirements, thereby improving the forming efficiency and forming quality of composite material long trusses. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a positioning and clamping device for composite material flat prepreg blanks;

[0027] Figure 2 This is a schematic diagram of the structure of the front-end clamping mechanism in the clamping state;

[0028] Figure 3 This is a structural diagram of the front-end clamping mechanism in a released state;

[0029] Figure 4 This is a schematic diagram of the structure of the screw slide motion lifting mechanism;

[0030] Figure 5 It is a schematic diagram of the workbench;

[0031] Figure 6 This is a working diagram of a positioning and clamping device for composite material flat prepreg blanks;

[0032] Figure 7 This is a schematic diagram of the guide groove connection between the back support plate and the bottom support plate;

[0033] Description of numbers in the figure

[0034] 1 is the front end clamping mechanism, 2 is the screw slide movement lifting mechanism, 3 is the workbench; 4 is the guide groove;

[0035] 1-1 is the cylinder, 1-2 is the guide groove, 1-3 is the push rod, 1-4 is the first auxiliary rod, 1-5 is the second auxiliary rod, 1-6 is the front pressure head, 1-7 is the third auxiliary rod, 1-8 is the cover plate, 1-9 is the fourth auxiliary rod, 1-10 is the support rod, 1-11 is the positioning block, 2-1 is the stepper motor, 2-2 is the coupling, 2-3 is the guide shaft, 2-4 is the base plate, 2-5 is the ball screw mechanism, 2-6 is the slide, 3-1 is the back support plate, 3-2 is the bottom support plate, 3-3 is the workbench bracket, 3-4 is the hat-shaped mold, and 3-5 is the composite material flat blank. DETAILED DESCRIPTION

[0036] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in a variety of different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0037] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] See also Figure 1 The present invention provides a positioning and clamping device for composite flat prepreg blanks, comprising a front-end clamping mechanism 1, a screw-slide motion and lifting mechanism 2, and a workbench 3. The screw-slide motion and lifting mechanism 2 is disposed on the workbench 3. The front-end clamping mechanism 1 is disposed on the screw-slide motion and lifting mechanism 2, which is used to adjust the vertical position of the front-end clamping mechanism 1, thereby enabling the clamping device to operate at different heights. Multiple clamping devices can be used in conjunction to operate composite flat prepreg blanks 3-5 of varying lengths and widths.

[0039] See also Figure 2 and Figure 3 The front end 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.

[0040] Among them, the bottom end of the push rod 1-3 is connected to the cylinder 1-1, one end of the first auxiliary rod 1-4 is connected to the 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 the 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 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 connected to the support rod 1-10, and the end of the support rod 1-10 is connected to the cover plate 1-8, the push rod 1-3 is arranged in the guide groove 1-2, and the cover plate 1-8 is fixed on one side of the guide groove 1-2.

[0041] The movement of cylinder 1-1 drives push rod 1-3 forward or backward. Push rod 1-3 is connected via first auxiliary rod 1-4, second auxiliary rod 1-5, and third auxiliary rod 1-7 to press down or lift front ram 1-6. Simultaneously, push rod 1-3 is connected via fourth auxiliary rod 1-9 to support rod 1-10, allowing support rod 1-10 to extend and retract. When support rod 1-10 extends and front ram 1-6 presses down, they clamp composite material planar blank 3-5, achieving a single clamping action by cylinder 1-1. Meanwhile, cover plate 1-8 limits push rod 1-3 during operation.

[0042] The cylinder 1-1 pushes the push rod 1-3 to realize the extension of the support rod 1-10, thereby supporting the composite material flat blank 3-5. At the same time, the push rod 1-3 also drives the front pressure head 1-6 to press down and cooperate with the support rod 1-10 for clamping; using one forward pushing action to realize the coordinated clamping of the two actions of pressing down and extending forward, the number of prime movers can be reduced and the cost can be reduced.

[0043] like Figure 2 As shown, when the front-end 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 the front pressure head 1-6 downward, and at the same time extend the support rod 1-10 forward, and the front pressure head 1-6 cooperates with the support rod 1-10 to clamp the composite material flat blank 3-5.

[0044] like Figure 3 As shown, when the front-end clamping mechanism is in the loosened state, the forming device forms to the clamping position, the cylinder 1-1 drives the push rod 1-3 to retreat, 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, the support rod 1-10 retreats without affecting the forming process. The front pressure head 1-6 cooperates with the support rod 1-10 to loosen the composite material flat blank 3-5.

[0045] At the same time, when the composite material plane blank 3-5 is placed, the cover plate 1-8 plays a limiting role.

[0046] See also Figure 2 and Figure 3 The support rod 1-10 is provided with a plurality of 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 are in point contact or line contact with the side of the composite material planar blank 3-5. By arranging a plurality of positioning blocks 1-11, the composite material planar blank 3-5 can be accurately positioned.

[0047] See also Figure 4 The screw slide motion lifting mechanism 2 is composed of a stepping 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.

[0048] The stepper motor 2-1 is mounted on a base plate 2-4, which is provided with a fixing member. 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, which is connected to the ball screw mechanism 2-5. The guide shafts 2-3 are provided on both sides of the ball screw mechanism 2-5, and the guide shafts 2-3 are arranged parallel to each other 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 is capable of sliding 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 to the base plate 2-4. The cylinder 1-1 is mounted on the slide 2-6.

[0049] Under the control of the stepper motor 2-1, the slide 2-6 can realize lifting movement. The slide 2-6 is connected to the front-end clamping mechanism 1, ensuring that the front-end clamping mechanism 1 can work at any height.

[0050] See also Figure 5 The workbench 3 is composed of 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. The workbench bracket 3-3 has a plurality of bottom support plates 3-2 disposed on either side of its top surface. A hat-shaped mold 3-4 is disposed on its top surface, and the composite material flat blank 3-5 is disposed on the hat-shaped mold 3-4. The substrate 2-4 is fixed to the back support plate 3-1.

[0051] See also Figure 7 A guide groove 4 is provided at the connection between the back support plate 3-1 and the bottom support plate 3-2. Specifically, the guide groove 4 is provided on the bottom support plate 3-2, and a protrusion is provided under the bottom surface of the back support plate 3-1. The protrusion can be stuck in the guide groove 4. The back support plate 3- moves along the guide groove 4 to clamp blanks of different widths, thereby realizing the positioning and clamping work of composite material plane blanks 3-5 with different widths.

[0052] See also Figure 6 The composite material flat prepreg blank positioning and clamping device consists of a front clamping mechanism 1, a screw slide motion lifting mechanism 2, and a workbench 3. The screw slide motion lifting mechanism 2 is fixed to the back support plate 3-1, and the bottom support plate 3-2 connects the back support plate 3-1 and the workbench bracket 3-3.

[0053] A plurality of positioning and clamping devices are provided on the workbench bracket 3-3, and the plurality of positioning and clamping devices include 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 device 4, the third positioning and clamping device 6, and the fifth positioning and clamping device 8 are provided on one side of the workbench 3, and the second positioning and clamping device 5, the fourth positioning and clamping device 7, and the sixth positioning and clamping device 9 are provided on the other side of the workbench 3. In addition, the first positioning and clamping device 4 is symmetrically arranged with the second positioning and clamping device 5, the third positioning and clamping device 6 is symmetrically arranged with the fourth positioning and clamping device 7, and the fifth positioning and clamping device 8 is symmetrically arranged with the sixth positioning and clamping device 9.

[0054] During operation, the first positioning and clamping device 4 cooperates with the second positioning and clamping device 5; the third positioning and clamping device 6 cooperates with the fourth positioning and clamping device 7; and the fifth positioning and clamping device 8 cooperates with the sixth positioning and clamping device 9. When the molding apparatus reaches the first positioning and clamping device 4 and the second positioning and clamping device 5, the first positioning and clamping device 4 and the second positioning and clamping device 5 can be released without affecting the molding process, while the remaining positioning and clamping devices remain in position and clamping, preventing the composite material planar blank 3-5 from deviating during the molding process. The coordinated use of multiple positioning and clamping devices can achieve positioning and clamping of varying lengths.

[0055] The working process of the composite material flat prepreg blank positioning and clamping device is as follows:

[0056] The screw slide motion lifting mechanism 2 is fixed to one side of the workbench 3, and the slide 2-6 is connected to the cylinder 1-1 to realize the up and down positioning control of the front-end clamping mechanism. First, the screw slide motion lifting mechanism 2 is connected and fixed to the workbench 3 through the through hole reserved on the base plate 2-4, and then the front-end clamping mechanism 1 is connected to the slide 2-6; during the working process, the screw slide motion lifting mechanism 2 drives the slide 2-6 along the guide shaft 2-3 through the stepper motor 2-1 to realize the lifting movement, and the front-end clamping mechanism 1 pushes the push rod 1-3 to the cover plate 1-8 through the cylinder 1-1, and 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 support plate 1-10 extending forward and the front pressure head 1-6 pressing down to clamp the composite material flat blank 3-5, thereby realizing the support and clamping work during the forming process of the composite material flat blank 3-5. When the cylinder 1-1 pulls the 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 rise and the support plate 1-10 to retreat, thereby loosening the composite material flat blank 3-5 without affecting the forming process.

[0057] The above description is merely a description of the preferred embodiment of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiment, and variations in the specific structure are permitted. Any variations made within the scope of the independent claims of the present invention are also within the scope of protection of the present invention.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present 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 composite material flat prepreg blank positioning and clamping device, characterized in that: It comprises a front end clamping mechanism (1), a screw slide motion lifting mechanism (2) and a workbench (3); the screw slide motion lifting mechanism (2) is arranged on the workbench (3); Wherein, the front end clamping mechanism (1) is arranged on the screw slide motion lifting mechanism (2); The front end clamping mechanism (1) comprises 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); The push rod (1-3) is arranged 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 arranged on the cover plate (1-8), and the other end is arranged 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 arranged 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 arranged on the support rod (1-10), and one end of the support rod (1-10) is connected to the cover plate (1-8).

2. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that: 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 to the support rod (1-10) through the fourth auxiliary rod (1-9), so that the support rod (1-10) extends forward and retreats backward. When the support rod (1-10) extends forward and the front pressure head (1-6) presses down, the composite material plane blank (3-5) is clamped, so that one cylinder (1-1) completes the clamping and matching action.

3. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that: When the front clamping mechanism (1) is in a 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 the front pressing head (1-6) downward, while simultaneously extending the support rod (1-10) forward, and the front pressing head (1-6) cooperates with the support rod (1-10) to clamp the composite material plane blank (3-5).

4. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that: When the front clamping mechanism is in a released state, the cylinder (1-1) drives the push rod (1-3) to retreat, and the first auxiliary rod (1-4), the second auxiliary rod (1-5), and the third auxiliary rod (1-7) lift the front pressing head (1-6), and at the same time, the support rod (1-10) retreats without affecting the forming process. The front pressing head (1-6) cooperates with the support rod (1-10) to release the composite material plane blank (3-5).

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

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

7. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that: The workbench (3) comprises a back support plate (3-1), a bottom support plate (3-2), a workbench bracket (3-3) and a hat-shaped mold (3-4); A plurality of bottom support plates (3-2) are provided on both sides of the top surface of the workbench bracket (3-3); a hat-shaped mold (3-4) is provided on the top surface of the workbench bracket (3-3); and a composite material plane blank (3-5) is provided on the hat-shaped mold (3-4); and a lead screw slide motion lifting mechanism (2) is fixed on the back support plate (3-1).

8. The composite material flat prepreg blank positioning and clamping device according to claim 1, characterized in that: A guide groove (4) is provided at the connection between the back support plate (3-1) and the bottom support plate (3-2).

9. A method for positioning and clamping a composite material flat prepreg blank based on the device according to claim 6, characterized in that: The following steps are involved: The screw slide motion lifting mechanism (2) is fixed on one side of the workbench (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 motion lifting mechanism (2) is fixed to the workbench (3), and then the front end clamping mechanism (1) is connected to the slide (2-6); when clamping, the screw slide motion lifting mechanism (2) drives the slide (2-6) along the guide shaft (2-3) through the stepping motor (2-1), and the front end clamping mechanism (1) pushes the push rod (1-3) to the cover plate (1-8) through the cylinder (1-1), and the support plate (1-10) is extended forward and the front pressure head (1-6) is pressed downward 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 plane blank (3-5).

10. The method for positioning and clamping a composite material flat prepreg blank according to claim 9, 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 rise and the support plate (1-10) to retreat, thereby loosening the composite material plane blank (3-5).

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