A sliding stiffened panel stringer axis degree control device and its usage method

Abstract

The present invention discloses a sliding stringer axis degree control device for stiffened panels and a using method. The control device includes a positioning card board, a fitting block, a sliding limit block, an adjusting screw, and an adjustable nut. The fitting block is fixed on the positioning card board. A sliding notch for cooperating with the sliding limit block is formed in the middle of the fitting block. The sliding limit block is inserted into the sliding notch and can slide up and down on the positioning card board to meet the position adjustment in different technological processes. A fitting gap is reserved between the limit notch and the stringer vertical rib. The present invention solves the problems of low efficiency and card board wear caused by the need to disassemble and assemble the positioning card board multiple times during the processes of stringer positioning, combination, bag making, curing, etc. for composite material stiffened panels. At the same time, by reserving a gap in the limit notch, the uniform transmission of pressure during the curing process is ensured, and technical problems such as bonding interface defects caused by position interference between the wall panel and the positioner are solved.

Description

Technical Field

[0001] This invention patent relates to the field of composite material manufacturing, and particularly to a control device and usage method for the axis straightness of stringers of a sliding composite stiffened panel. Background Art

[0002] Due to its excellent weight reduction characteristics and high designability, composite materials have become one of the basic materials for structural components in the aerospace field. The composite stiffened panel realizes the integrated molding of the skin and stringers, which can simplify system installation, reduce the usage of fasteners, and improve the integration degree of the overall structure. It has become an important structural representative for the application of composite materials in the aerospace field.

[0003] Due to the requirements of load-bearing and assembly, the axis straightness of the stringers needs to be strictly controlled during the production process of the panel. Currently, the control method for the axis straightness of the stringers is to limit the position with a clamping plate. During the processes of stringer positioning, combination, bagging, and curing, the positioning clamping plate needs to be disassembled and assembled multiple times. Especially for large-sized stiffened panels, the self-weight of the clamping plate is relatively large, and the operation is difficult during the disassembly, assembly, and handling processes. Moreover, each time the clamping plate is disassembled and assembled, the stringer positioning and debugging need to be carried out again, resulting in low efficiency. At the same time, since the existing control devices for the axis straightness of the stringers are all contact positioning, during the panel combination and high-temperature curing processes, the assembly stress caused by the operator adjusting the clamping plate positioning device and the internal stress during the curing process cannot be effectively released, resulting in position interference between the stringer vertical ribs and the clamping plate positioning device, uneven transfer of the curing pressure, and non-destructive testing defects at the bonding interface between the stringer and the panel, affecting the forming quality of the panel.

[0004] Therefore, for the control of the axis straightness of the stringers of the composite stiffened panel, there is an urgent need for an efficient and stable control device and usage method to improve the production efficiency and the forming quality of the panel. Summary of the Invention

[0005] This invention patent provides a control device and usage method for the axis straightness of stringers of a sliding composite stiffened panel. Through the up-and-down sliding of the sliding positioning device, it can ensure that during the processes of stringer positioning, combination, bagging, and curing, the relevant processes can be completed without removing the clamping plate, improving the production efficiency of the panel. At the same time, by reserving a gap of 0.3 mm to 0.5 mm between the positioning notch and the outer surface of the stringer vertical rib, the stress release requirement during the curing process of the panel is met, and there will be no stress interference between the stringer vertical rib and the positioner, ensuring the uniform transfer of pressure during the curing process and good forming quality of the bonding interface of the panel after forming.

[0006] The technical solution of the present invention is as follows: A sliding stiffened panel axis control device includes a positioning card board, a fitting block, a sliding limit block, an adjusting screw, and an adjustable nut. The fitting block is fixed on the positioning card board. A sliding notch for cooperating with the sliding limit block is opened in the middle of the fitting block. The sliding limit block is inserted into the sliding notch and can slide up and down on the positioning card board by loosening and tightening the adjusting screw and the adjustable nut. There is a positioning notch at the lower part of the sliding limit block, and the depth is not less than 1 / 2 of the height of the stringer vertical rib. The stringer vertical rib is limited in the positioning notch, and there is a bag-making gap between the two side surfaces of the stringer vertical rib and the inner wall of the positioning notch.

[0007] Further, there is an oblong slot on the positioning card board for the adjusting screw to slide up and down.

[0008] Further, the bag-making gap is 0.3mm - 0.5mm.

[0009] The usage method of the sliding composite stiffened panel axis control device includes the following steps:

[0010] 1 Insert the sliding limit block into the fitting block through the sliding notch, and use the positioning pin and the pressing pin to fix the fitting block on the positioning card board;

[0011] 2 Lift the sliding limit block upward. When the sliding limit block can no longer slide upward, use the adjustable nut to fix the sliding limit block;

[0012] 3 Place the stringer in place, loosen the adjustable nut counterclockwise, and the sliding limit block automatically slides downward under the action of gravity. Adjust the position of the stringer through the relative relationship between the positioning notch and the stringer vertical rib;

[0013] 4 Lift the sliding limit block upward, rotate the adjustable nut clockwise to fix the sliding limit block, and perform bag-making on the composite material panel. The positioning card board does not need to be removed during the bag-making process;

[0014] 5 Loosen the adjustable nut counterclockwise, and the sliding limit block automatically slides downward under the action of gravity. The positioning notch limits and controls the stringer vertical rib during the entire curing process;

[0015] 6 After curing is completed, lift the sliding limit block upward, rotate the adjustable nut clockwise to fix the sliding limit block, remove the positioning card board, and demold the composite material stiffened panel.

[0016] The control device and its usage method described in the present invention have the following advantages: 1) The up-and-down sliding of the sliding positioning device can realize processes such as stringer positioning, bag making, and curing without removing the clamping plate, with high efficiency in stringer combination and positioning. By reserving a gap through the limit notch, the stress release requirement of the panel during the curing process is met. There is no stress interference between the stringer vertical ribs and the positioner, ensuring uniform pressure transmission during the curing process. After forming, the bonding quality of the panel adhesive interface is good, and the stringer positioning accuracy is controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the working principle of the sliding stringer axis control device

[0018] Figure 2 Schematic diagram of the sliding stringer axis control device

[0019] Figure 3 Side view of the sliding stringer axis control device

[0020] Figure 4 Rear view of the sliding stringer axis control device

[0021] Figure 5 Schematic diagram of the nested block structure in the sliding stringer axis control device

[0022] Explanation of the numbers in the figure: 1 - positioning clamping plate, 2 - oblong slot, 3 - sliding limit block, 4 - nested block, 5 - pressing pin, 6 - positioning notch, 7 - stringer vertical rib, 8 - positioning pin, 9 - adjusting screw, 10 - adjustable nut, 11 - sliding notch. DETAILED DESCRIPTION OF THE INVENTION

[0023] Taking the co-bonding process for manufacturing composite stiffened panels as an example, the technical solution of the present invention is described in detail, but the protection scope of the present invention is not limited to the following description.

[0024] Such as Figures 1-5 , a sliding stiffened panel axis degree control device includes a positioning clamping plate 1, a nested block 4, a sliding limit block 3, an adjusting screw 5, and an adjustable nut 8. The nested block 4 is fixed on the positioning clamping plate 1 through a pressing pin 5 and a positioning pin 8. A sliding notch 11 for cooperating with the sliding limit block 3 is opened in the middle of the nested block 4. The sliding limit block 3 is inserted into the sliding notch 11 and can slide up and down on the positioning clamping plate 1 by loosening and pressing the adjusting screw 9 and the adjustable nut 10. A positioning notch 6 is provided at the lower part of the sliding limit block 3, and the depth is not less than 1 / 2 of the height of the stringer vertical rib. The stringer vertical rib 7 is limited in the positioning notch 6, and a bag making gap is left between the two side surfaces of the stringer vertical rib 7 and the inner wall of the positioning notch 6.

[0025] Specifically, there is an oblong slot 2 on the positioning clamping plate 1 for the adjusting screw 9 to slide up and down.

[0026] Specifically, a bag-making gap of 0.3 mm to 0.5 mm has a good effect, and 0.5 mm is preferred.

[0027] The usage method of the sliding composite material stiffened panel axis degree control device includes the following steps:

[0028] 1 Insert the 3 sliding limit blocks into the fitting block 4 through the sliding slots 11, and use the positioning pin 8 and the pressing pin 5 to fix the fitting block 4 on the positioning card board 1;

[0029] 2 Lift the sliding limit block 3 upward. When the sliding limit block 3 can no longer slide upward, use the adjustable nut 10 to fix the sliding limit block 3;

[0030] 3 Place the stringer in place, loosen the adjustable nut 10 counterclockwise. The sliding limit block 3 automatically slides downward under the action of gravity, and adjust the position of the stringer through the relative relationship between the positioning slot 6 and the stringer rib 7;

[0031] 4 Lift the sliding limit block 3 upward, rotate the adjustable nut 10 clockwise to fix the sliding limit block 3, and perform bag-making of the composite material wall panel. The positioning card board 1 does not need to be removed during the bag-making process;

[0032] 5 Loosen the adjustable nut 10 counterclockwise. The sliding limit block 3 automatically slides downward under the action of gravity, and the positioning slot 6 limits and controls the stringer rib 7 during the entire curing process;

[0033] 6 After the curing is completed, lift the sliding limit block 3 upward, rotate the adjustable nut 10 clockwise to fix the sliding limit block 3, remove the positioning card board 1, and demold the composite material stiffened panel.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sliding stiffened wall panel axis degree control device, characterized in that It includes a positioning card board, a fitting block, a sliding limit block, an adjusting screw, and an adjustable nut. The fitting block is fixed on the positioning card board. A sliding notch for cooperating with the sliding limit block is opened in the middle of the fitting block. The sliding limit block is inserted into the sliding notch and can slide up and down on the positioning card board by loosening and tightening the adjusting screw and the adjustable nut. There is a positioning notch at the lower part of the sliding limit block, and the depth is not less than 1 / 2 of the height of the stringer vertical rib. The stringer vertical rib is limited in the positioning notch, and there is a bag-making gap between the two side surfaces of the stringer vertical rib and the inner wall of the positioning notch. There is an oblong slot on the positioning card board for the adjusting screw to slide up and down. The bag-making gap is 0.3 mm to 0.5 mm.

2. The usage method of a sliding stiffened wall panel axis degree control device according to claim 1 includes the following steps: 2-1 Insert the sliding limit block into the fitting block through the sliding notch, and use a positioning pin and a pressing pin to fix the fitting block on the positioning card board; 2-2 Lift the sliding limit block upward. When the sliding limit block can no longer slide upward, use the adjustable nut to fix the sliding limit block; 2-3 Place the stringer in place, loosen the adjustable nut counterclockwise, and the sliding limit block automatically slides downward under the action of gravity. Adjust the position of the stringer through the relative relationship between the positioning notch and the stringer vertical rib; 2-4 Lift the sliding limit block upward, rotate the adjustable nut clockwise, fix the sliding limit block, and perform bag-making for the composite material wall panel. The positioning card board does not need to be removed during the bag-making process; 2-5 Loosen the adjustable nut counterclockwise, and the sliding limit block automatically slides downward under the action of gravity. The positioning notch limits and controls the stringer vertical rib during the entire curing process; 2-6 After curing is completed, lift the sliding limit block upward, rotate the adjustable nut clockwise, fix the sliding limit block, remove the positioning card board, and demold the composite material stiffened wall panel.

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