Pressing device for preformed material sheet

Abstract

The utility model belongs to the technical field of composite material manufacturing, and discloses a preformed material sheet pressing device. The device comprises a tool, the edge of the tool is sunken to form a placement table, a preformed material sheet is placed on the placement table, the middle of the tool protrudes to form a connecting table, a pressing piece is installed on the connecting table, the pressing piece is connected to the upper side of the preformed material sheet in a pressed mode, the connecting table is sunken to form a notch, a flexible pad is placed in the notch, and the flexible pad abuts against the pressing piece. The top surface of the flexible pad is higher than the preformed material sheet; the problems that in the prior art, preformed material pieces cannot be pressed tightly in the machining process, the slippage phenomenon occurs, and finally the carbon fiber composite cannot be formed are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite material manufacturing technical field especially relates to a preform piece compression device. BACKGROUND

[0002] At present, carbon fiber composite material on the airplane has gradually developed from non-bearing parts, secondary bearing parts to main bearing parts, and develops in the direction of large-scale, complication and integration, which needs to manufacture the composite required parts through more complex process, in the process of making composite material, mainly uses single diaphragm preforming process, single diaphragm preforming process mainly is to place preform piece on the tool surface, the diaphragm is sleeved on the preform piece and the outside of tool, and the diaphragm is vacuumized, then the preform piece is clamped by pressing part and tool, the other part of preform piece is suspended, the infrared is used to heat to reach the preset temperature, then the vacuum rate is controlled, the diaphragm drives the preform piece to bend slowly and finally adhere to the tool, forming the required shape.

[0003] But in the existing single diaphragm preforming process, a part of preform piece is placed in the reserved groove at the edge of tool, and the other part of preform piece is in suspended state and waits to bend, if the thickness of preform piece is greater than the thickness of tool reserved groove, the pressing part will be lifted by the high corner of preform piece, so that the pressing part is inclined, the lower surface of pressing part cannot be attached to the upper surface of preform piece, which causes that the preform piece cannot be pressed tightly, and the preform piece is prone to slip during the forming process, which causes that the preform piece cannot be prepared into qualified carbon fiber composite material. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a preform piece compression device, solves the problem that the preform piece cannot be pressed tightly in the processing process under the prior art, the phenomenon of slipping occurs, and finally the carbon fiber composite material cannot be formed.

[0005] In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a preform piece compression device, which comprises a tool, the edge of the tool is recessed to form a placing table, the preform piece is placed on the placing table, the middle part of the tool is protruded to form a connecting table, the pressing part is installed on the connecting table and is pressed on the upper side of the preform piece, the recess is formed in the connecting table, the flexible pad is placed in the recess, the flexible pad abuts against the pressing part, and the top surface of the flexible pad is higher than the preform piece.

[0006] Preferably, the tool is a rectangular cuboid, the connecting table is arranged in the middle of the upper surface of the tool, and the placing table is arranged on both sides of the connecting table along the width direction of the rectangular cuboid.

[0007] Preferably, the two sides of the pressing member are provided with pressing portions which abut against the preform sheet on the upper side of the placement table.

[0008] Preferably, the shape of the pressing portion is the same as the shape of the corresponding position of the placement table, and the pressing portion changes with the change of the width of the placement table.

[0009] Preferably, the pressing member is provided with a fixing hole, and the connecting table is provided with a screw hole, and a bolt is screwed into the screw hole through the fixing hole.

[0010] Preferably, the fixing hole is in a strip shape.

[0011] Preferably, the lower bottom surface of the pressing portion is provided with a sawtooth which abuts against the preform sheet.

[0012] Preferably, the edge of the tooling and the pressing member is provided with a chamfer.

[0013] Beneficial effects: when the thickness of the preform sheet is too thick, the pressing member is raised, the flexible pad is clamped between the pressing member and the connecting table, the pressing member is lifted by the flexible pad, the pressing member is kept in a horizontal state, then the pressing member is fixed on the tooling, the pressing member is in parallel contact with the preform sheet in a horizontal state, the contact area of the pressing member and the preform sheet is maximized, the sliding probability of the preform sheet in the bending process is reduced, and the processing yield is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a working sectional view of the preform sheet pressing device of the utility model;

[0015] Figure 2 is a front view of the pressing member of the utility model;

[0016] Figure 3 is a schematic view of the common tooling being raised.

[0017] In the figure: 1, tooling; 11, placement table; 12, connecting table; 2, pressing member; 21, pressing portion; 22, fixing hole; 3, preform sheet; 4, flexible pad; 5, bolt. DETAILED DESCRIPTION

[0018] The utility model will be further described in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0019] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skilled in the art, the above-mentioned terms can be understood in the utility model according to the specific meaning of the specific circumstances.

[0020] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0021] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or position relationship is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0022] Under the prior art, as shown in Figure 3 If the thickness of the preformed sheet in the reserved groove is too high, the part of the preformed sheet that is too high will abut against the bottom of the pressing part, causing the pressing part to be raised, and after the pressing part is fixed on the tooling, it will cause the insufficient contact area between the pressing part and the preformed sheet, resulting in insufficient friction, and finally in the preformed sheet forming process, the preformed sheet will slip relative to the pressing part, causing the preformed sheet to deviate from the intended position, resulting in the failure of the carbon fiber composite material preparation.

[0023] In order to solve the above problems, as shown in Figures 1 to 2As shown, the utility model provides a kind of preform piece compression device, including tool 1, recess is formed with placing table 11 in the edge of tool 1, preform piece 3 is placed on placing table 11, connecting table 12 is formed with in the middle of tool 1, connecting table 12 is installed with compression piece 2, compression piece 2 is pressed on the upside of preform piece 3, recess is formed with in the connecting table 12, flexible pad 4 is placed in the gap, flexible pad 4 and compression piece 2 abut, and the top surface of flexible pad 4 is higher than preform piece 3.The shape of flexible pad 4 block can be any shape, which can be circular, rectangular, triangular or other shapes. Meanwhile, the compression piece 2 also needs to be chamfered to avoid interference with the preform piece 3, and the chamfer angle range is 0°-90°.

[0024] A downward recess is formed on the side of connecting table 12 close to placing table 11, and flexible pad 4 is placed in the gap. At this time, the height of the upper surface of the flexible pad 4 is higher than the height of the upper surface of the preform piece 3, and the preform piece 3 will not lift the compression piece 2. After compression and fixation of the compression piece 2, the compression piece 2 will deform the flexible pad 4, and the upper surface of the flexible pad 4 will be flush with the surface of the preform piece 3. Finally, the compression piece 2 can be attached to the preform piece 3, increasing the contact area between the compression piece 2 and the preform piece 3, making the preform piece 3 more stable. The utility model only installs flexible pad 4 at the gap between placing table 11 and connecting table 12, minimizing the improvement and reducing the improvement cost. During processing, the preform piece 3 is bent on the tool 1, and the suspended area of the preform piece 3 will rotate 90° downward, forming a preform piece 3 with an L-shaped cross section.

[0025] The tool 1 is a rectangular cuboid, and the connecting table 12 is arranged in the middle of the upper surface of the tool 1. The placing tables 11 are arranged on both sides of the connecting table 12 along the width direction of the rectangular cuboid.

[0026] The tool 1 of the utility model can be provided with placing tables 11 on both sides along the width direction of the tool 1, and the connecting table 12 is located between the two groups of placing tables 11. The preform pieces 3 can be placed on both sides of the placing tables 11 at the same time, and the preform pieces 3 can be bent L-shaped at the same time, which can improve the processing efficiency. In addition, there are placing tables 11 of different widths on the tool 1. Since the placing tables 11 on both sides can have different widths, they can adapt to different sizes of preform pieces 3 for subsequent processing, allowing the preform pieces 3 to be bent and processed at different width positions. This makes the tool 1 of the utility model more versatile in processing size and capable of processing wider preform pieces 3.

[0027] The both sides of the compression part 2 are provided with the crimping parts 21, and the crimping parts 21 abut against the preformed sheet 3 on the upper side of the placing table 11. The crimping parts 21 on the both sides can further fix the preformed sheet 3 by crimping the preformed sheet 3, and the crimping parts 21 directly abut against the preformed sheet 3, so that the preformed sheet 3 can be accurately crimped, and the preformed sheet 3 can be more stable during processing.

[0028] It should be particularly pointed out that the shape of the crimping part 21 is the same as that of the corresponding placing table 11, and the crimping part 21 changes along with the change of the width of the placing part, so that the crimping part 21 can abut against the lower preformed sheet 3, the preformed sheet 3 is fixed, the contact area with the preformed sheet 3 is increased, the preformed sheet 3 can be stable during processing, and slipping is avoided.

[0029] The fixing hole 22 is formed on the compression part 2, the screw hole is formed on the connecting table 12, and the bolt 5 is screwed in the screw hole through the fixing hole 22. The compression part 2 is fastened on the connecting table 12 through the bolt 5 fixed on the screw hole, and other detachable fastening modes can also be used, and the bolt 5 is not limited to be used for fixing.

[0030] The fixing hole 22 is in a strip shape, so that the position of the compression part 2 can be adjusted, the fixed position of the compression part 2 can be slightly changed, the position of the compression part 2 can be adjusted, and the preformed sheet 3 is fixed.

[0031] The lower bottom surface of the crimping part 21 is provided with sawteeth, and the sawteeth abut against the preformed sheet 3. The lower bottom surface of the crimping part 21 is provided with sawteeth with a depth of 1mm, and the sawteeth can also be in a corrugated shape, a wave point shape or other shapes to increase the friction force and avoid the problem of slipping of the preformed sheet 3. The crimping part has a certain thickness, so that the crimping part cannot be deformed during transportation.

[0032] The edges of the tool 1 and the compression part 2 are chamfered, and the upper side edge of the compression part 2 is provided with a slope, and the edge of the slope is chamfered. The chamfer can avoid cutting the diaphragm, and the stability and success rate of processing are improved.

[0033] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A preform compacting device characterized by, The utility model provides a preform piece pressing device, which comprises a tooling (1), the tooling (1) is recessed to form a placing table (11) on the edge, the preform piece (3) is placed on the placing table (11), the tooling (1) is convex to form a connecting table (12) in the middle, the connecting table (12) is installed with a compression part (2), the compression part (2) is pressed on the upside of the preform piece (3), the connecting table (12) is recessed to form a notch, the notch is placed with a flexible pad (4), the flexible pad (4) is in contact with the compression part (2), and the top surface of the flexible pad (4) is higher than the preform piece (3).

2. The preform patch compacting device of claim 1, wherein, The tooling (1) is a rectangular cuboid, the connecting table (12) is arranged in the middle of the upper surface of the tooling (1), and the placing table (11) is arranged on both sides of the connecting table (12) along the width direction of the rectangular cuboid.

3. The preform patch compacting device of claim 1, wherein, The both sides of the compression part (2) are convex to form a pressing part (21), and the pressing part (21) is in contact with the preform piece (3) on the upside of the placing table (11).

4. The preform patch compacting apparatus of claim 3, wherein, The shape of the pressing part (21) is the same as the shape of the corresponding position of the placing table (11), and the pressing part (21) changes along with the width change of the placing table (11).

5. The preform patch compacting apparatus of claim 1 wherein, A fixing hole (22) is formed in the compression part (2), and a screw hole is formed in the connecting table (12), and a bolt (5) is screwed in the screw hole through the fixing hole (22).

6. The preform compacting device of claim 5, wherein, The fixing hole (22) is in the shape of a long strip.

7. The preform patch compacting apparatus of claim 3, wherein, The lower bottom surface of the pressing part (21) is formed with a sawtooth, and the sawtooth is in contact with the preform piece (3).

8. The preform patch compacting device of claim 1, wherein, The edges of the tooling (1) and the compression part (2) are chamfered.

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