A preforming device and a preforming method for a plate body

Abstract

The application discloses a kind of preforming device and preforming method of plate body, it is related to composite manufacturing technical field.The preforming device includes guide rail, double diaphragm machine and positioning mechanism.First platform and second platform are slidably arranged on guide rail, first platform is used to carry workpiece, and second platform is used to carry diaphragm and plate body;Double diaphragm machine is arranged between first platform and second platform and has working position, first platform and second platform can be moved to working position, and double diaphragm machine can form plate body on workpiece in working position;Positioning mechanism includes positioning member and recorder, positioning member can position workpiece, when first platform is in working position, recorder can record the position of positioning member, and according to the position of positioning member, plate body on second platform in working position is positioned.The preforming device can realize accurate positioning of plate body and workpiece, and has high precision and high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite material manufacturing, and in particular to a pre-forming device and method for a plate body. BACKGROUND

[0002] With the extensive use of composite materials in the field of aviation, the hot diaphragm pre-forming process method has also been gradually applied in the aviation composite material manufacturing industry, and the double diaphragm pre-forming process is relatively advanced. In the double diaphragm pre-forming process, the relative position between the laminated plate and the tooling is particularly important. If the material layer and the tooling are not accurately positioned, the fiber angle of the part cannot be guaranteed, especially for variable-thickness parts, inaccurate positioning will result in a large difference between the position of each thickness area of the part and the theoretical value. During the preparation of the double diaphragm, once the position of the pre-impregnated laminated plate between the upper and lower diaphragms is determined, the relative position of the material layer and the tooling is determined, and the position cannot be adjusted again during the double diaphragm process.

[0003] In the double diaphragm pre-forming process in the prior art, reference lines are generally marked on the pre-forming tooling and the pre-impregnated laminated plate, and then the positioning is achieved by measuring the distance and observing with the naked eye. This positioning method is time-consuming and difficult to position, especially for large parts, the positioning accuracy is more difficult to guarantee.

[0004] In view of the above problems, it is necessary to develop a pre-forming device and method for a plate body to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a pre-forming device that can accurately position the plate body and the workpiece, and has high precision and high efficiency.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] A pre-forming device for a plate body, comprising:

[0008] A guide rail, a first platform and a second platform are slidably arranged on the guide rail, the first platform is used to carry a workpiece, and the second platform is used to carry a diaphragm and a plate body;

[0009] A double diaphragm machine is arranged between the first platform and the second platform and has a working position, the first platform and the second platform can move to the working position, and the double diaphragm machine can form the plate body located in the working position on the workpiece;

[0010] A positioning mechanism, the positioning mechanism comprises a positioning member and a recorder, the positioning member is capable of positioning the workpiece, when the first platform is located at the working position, the recorder is capable of recording the position of the positioning member, and positioning the plate body on the second platform at the working position according to the position of the positioning member.

[0011] Preferably, the recorder is a laser tracker, the positioning member comprises a first target hole and a second target hole, the laser tracker is capable of collecting the positions of the first target hole, the second target hole and a plurality of points on the surface of the positioning member and establishing a space coordinate system.

[0012] Preferably, the upper surface of the workpiece is provided with a marking line, the positioning member is provided with a positioning end, the positioning member is capable of being attached to the upper surface of the workpiece, and the positioning end is aligned with the marking line to position the workpiece.

[0013] Preferably, the positioning end is provided with a positioning protrusion, the marking line comprises a first groove, and the sidewall of the plate body is recessed with a second groove, the positioning protrusion is matched with the first groove and capable of being clamped into the second groove.

[0014] Preferably, the positioning mechanism comprises at least two positioning members.

[0015] Preferably, the second platform is provided with a supporting assembly, the supporting assembly is provided with a shaped gap, the supporting assembly is located below the diaphragm, the plate body and the workpiece can pass through the shaped gap, and when the second platform moves to the working position, the double diaphragm machine can lift the plate body and the diaphragm through the supporting assembly.

[0016] Preferably, the guide rail is provided with a limiting member, and when the first platform moves to abut against the limiting member, the first platform is located at the working position.

[0017] A pre-forming method of a plate body, for a pre-forming device of the plate body, the pre-forming method comprises:

[0018] S1, placing a workpiece on a first platform and positioning the workpiece by a positioning member;

[0019] S2, moving the first platform to a working position and recording the position of the positioning member by a recorder;

[0020] S3, placing a diaphragm on a second platform, moving the first platform out of the working position, moving the second platform to the working position, and placing a positioning member at the position recorded by the recorder;

[0021] S4, placing the plate body on the diaphragm, and moving the plate body to abut against the positioning member to complete positioning of the plate body;

[0022] S5, covering another diaphragm on the plate body, lifting the diaphragm and the plate body, moving the second platform out of the working position, and moving the first platform to the working position;

[0023] S6, lowering the diaphragm 200 and the plate body 300 to the surface of the workpiece 100, and using the double-diaphragm machine to form the plate body on the workpiece.

[0024] Preferably, in step S2, recording the position of the positioning member by the recorder comprises:

[0025] S21, manufacturing a first target hole and a second target hole on the positioning member, and recording the positions of the first target hole and the second target hole;

[0026] S22, establishing a first reference plane on the surface of the positioning member;

[0027] S23, making a first straight line perpendicular to the first reference plane through the first target hole or the second target hole;

[0028] S24, making a second straight line connecting the first target hole and the second target hole;

[0029] S25, establishing a spatial coordinate system with the first straight line and the second straight line as coordinate axes, and obtaining initial coordinates of the first target hole and the second target hole in the spatial coordinate system.

[0030] Preferably, in step S3, placing the positioning member at the position recorded by the recorder comprises:

[0031] S31, placing the positioning member on the diaphragm;

[0032] S32, detecting detection coordinates of the first target hole and the second target hole in the spatial coordinate system;

[0033] S33, moving the positioning member until the horizontal and vertical coordinates of the detection coordinates of the first target hole and the second target hole coincide with the horizontal and vertical coordinates of the initial coordinates of the first target hole and the second target hole.

[0034] The present application has the following beneficial effects:

[0035] The application provides a pre-forming device and a pre-forming method of a plate body. The pre-forming device comprises a positioning mechanism, a positioning member of the positioning mechanism is capable of positioning a workpiece on a first platform, and a position of the positioning member on the first platform in a working position is recorded by a recorder, after a second platform is moved to the working position, the positioning member is placed at the position recorded by the recorder, and the plate body is moved to abut against the positioning member to complete positioning of the plate body. The positioning information is transmitted by the positioning member and the recorder, so that the accuracy of the relative position of the workpiece and the plate body in the working position is ensured.

[0036] The pre-forming device can realize accurate positioning of the plate body and the workpiece, and has high precision and high efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic view of the pre-forming device provided by the application;

[0038] Figure 2 is a structural schematic view of the pre-forming device provided by the application, in which a second platform is in a working position;

[0039] Figure 3 is a structural schematic view of a supporting assembly provided by the application.

[0040] In the drawings:

[0041] 100, workpiece; 101, engraved line; 102, first groove; 200, diaphragm; 300, plate body; 301, second groove;

[0042] 1, guide rail; 2, first platform; 3, second platform; 4, diaphragm machine; 5, positioning member; 6, supporting assembly;

[0043] 51, positioning end; 52, positioning protrusion; 53, first target hole; 54, second target hole; 61, supporting member; 62, forming gap. DETAILED DESCRIPTION

[0044] Embodiments of the application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the application, and cannot be understood as a limitation of the application.

[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0046] Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Unless otherwise expressly specified and limited, "on" or "under" the first feature of the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0048] The technical scheme of the present application will be further illustrated by specific embodiments in conjunction with the drawings.

[0049] In the double diaphragm preforming process, reference lines are generally marked on the preforming tool and the prepreg laminate, and then positioning is realized by measuring the distance and observing with the naked eye. This positioning method is time-consuming and difficult to position, especially for large parts, and the positioning accuracy is more difficult to guarantee.

[0050] To solve the above problems, the present embodiment provides a preforming device for a plate body, as shown in Figure 1 and Figure 2As shown, the pre-forming device comprises a guide rail 1 and a double diaphragm machine 4. The first platform 2 and the second platform 3 are slidably arranged on the guide rail 1, the first platform 2 is used to carry the workpiece 100, and the second platform 3 is used to carry the diaphragm 200 and the plate body 300. The double diaphragm machine 4 is arranged between the first platform 2 and the second platform 3 and has a working position, both the first platform 2 and the second platform 3 can be moved to the working position, and the double diaphragm machine 4 can form the plate body 300 on the workpiece 100 in the working position.

[0051] The pre-forming device is used for pre-forming the plate body 300 through the "double diaphragm" process, that is, two diaphragms 200 are respectively placed on both sides of the plate body 300 and tightly attached (the diaphragm 200 above the plate body 300 is not shown in the figure), and then the plate body 300 together with the two diaphragms 200 and the workpiece 100 are moved to the working position of the double diaphragm machine 4, and the double diaphragm machine 4 is used to perform vacuum extraction on one side of the diaphragm 200 to drive the plate body 300 to bend and deform, gradually close to the workpiece 100, until the plate body 300 and the workpiece 100 are in surface contact. The first platform 2 and the second platform 3 are guided by the guide rail 1, and the first platform 2 and the second platform 3 will not deviate when moving, that is, the first platform 2 and the second platform 3 can accurately move to the working position of the double diaphragm machine 4.

[0052] The pre-forming device further comprises a positioning mechanism, which comprises a positioning member 5 and a recorder. The positioning member 5 can position the workpiece 100, and when the first platform 2 is in the working position, the recorder can record the position of the positioning member 5, and the plate body 300 on the second platform 3 in the working position is positioned according to the position of the positioning member 5.

[0053] The pre-forming device positions the workpiece 100 on the first platform 2 through the positioning member 5, records the horizontal position of the positioning member 5 on the first platform 2 in the working position through the recorder, places the diaphragm 200 on the second platform 3 after moving the second platform 3 to the working position, then places the positioning member 5 on the diaphragm 200, moves the positioning member 5 so that the position of the positioning member 5 coincides with the position recorded by the recorder in the vertical direction, and then moves the plate body 300 to abut the positioning member 5 to complete the positioning of the plate body 300. Since the positions of the positioning member 5 in the vertical direction are the same when the first platform 2 or the second platform 3 is in the working position, the positioning information is transmitted through the positioning member 5 and the recorder, which can ensure the accuracy of the relative position of the workpiece 100 and the plate body 300 in the working position.

[0054] The pre-forming device can realize accurate positioning of the plate body 300 and the workpiece 100, and has high precision and high efficiency.

[0055] Preferably, the recording instrument is a laser tracker, the positioning member 5 comprises a first target hole 53 and a second target hole 54, and the laser tracker is capable of collecting the positions of the first target hole 53, the second target hole 54 and several points on the surface of the positioning member 5 and establishing a spatial coordinate system.

[0056] The laser tracker is used to collect the points on the surface of the positioning member 5 to establish a first reference plane, the first target hole 53 and the second target hole 54 are reference holes, and the first target hole 53 and the second target hole 54 are on the first reference plane. A first straight line perpendicular to the first reference plane is drawn through one of the target holes, and a second straight line is drawn by connecting the first target hole 53 and the second target hole 54. The spatial coordinate system can be established by taking the first straight line and the second straight line as coordinate axes.

[0057] The coordinates of the first target hole 53 and the second target hole 54 are marked in the above-mentioned spatial coordinate system. Since the laser tracker is stationary, the spatial coordinate system remains unchanged. Therefore, after moving the second platform 3 to the working position, it is only necessary to align the first target hole 53 and the second target hole 54 of the positioning member 5 with the previously recorded horizontal and vertical coordinates, and then move the plate body 300 to complete the positioning of the plate body 300, which can ensure the accuracy of the relative position of the plate body 300 and the workpiece 100 in the vertical direction.

[0058] As shown in Figure 2 , the upper surface of the workpiece 100 is provided with a marking line 101, and the positioning member 5 is provided with a positioning end 51. The positioning member 5 can be attached to the upper surface of the workpiece 100, and the positioning end 51 is aligned with the marking line 101 to position the workpiece 100. The positioning end 51 is used to position the workpiece 100, and can also be used to position the plate body 300. However, the side wall of the workpiece 100 may not be flush with the side wall of the plate body 300, and the marking line 101 provided on the upper surface of the workpiece 100 can avoid this problem and expand the application range of the positioning member 5.

[0059] It can be understood that, in order to improve the positioning accuracy, the position of the positioning member 5 recorded by the recording instrument should be the same as the position of the positioning member 5 when positioning the plate body 300, so as to avoid the error caused by the up and down movement of the positioning member 5. To achieve this purpose, the sum of the height of the table surface of the second platform 3 and the thickness of one diaphragm 200 is equal to the sum of the height of the table surface of the first platform 2 and the thickness of the workpiece 100.

[0060] Further, the positioning end 51 is provided with a positioning protrusion 52, the score line 101 is provided with a first recess 102, and the sidewall of the plate body 300 is provided with a second recess 301, the positioning protrusion 52 is matched with the first recess 102 and can be clamped into the second recess 301. The boundary of the plate body 300 is positioned by the positioning end 51, and the positioning protrusion 52 is matched with the first recess 102 and the second recess 301 for positioning, so that the positioning can be realized from two dimensions in the horizontal direction, and the positioning accuracy is improved.

[0061] It can be understood that, in order to further improve the positioning accuracy, the positioning mechanism includes at least two positioning members 5. The at least two positioning members 5 can position the workpiece 100 and the plate body 300 from multiple directions. In the embodiment, the positioning mechanism includes two positioning members 5, which can position the plate body 300 from opposite sides, respectively.

[0062] Preferably, the second platform 3 is provided with a supporting assembly 6, the supporting assembly 6 is provided with a shaped gap 62, the supporting assembly 6 is located below the diaphragm 200, and the plate body 300 and the workpiece 100 can pass through the shaped gap 62. When the second platform 3 moves to the working position, the double-diaphragm machine 4 can lift the plate body 300 and the diaphragm 200 through the supporting assembly 6.

[0063] When the second platform 3 moves to the working position and completes the positioning of the plate body 300, the diaphragm 200 and the plate body 300 need to be raised in the vertical direction, and the first platform 2 carrying the workpiece 100 is repositioned to the working position, and the diaphragm 200 and the plate body 300 are placed on the workpiece 100 for preforming. The supporting assembly 6 can lift the diaphragm 200 and the plate body 300 by supporting the diaphragm 200 on the outer periphery, and the shaped gap 62 can allow the plate body 300 and the workpiece 100 to pass through, so that the supporting assembly 6 does not interfere with the plate body 300 and the workpiece 100 when it is raised and lowered, and does not affect the bending of the plate body 300.

[0064] As shown in Figure 3 The supporting assembly 6 includes a supporting member 61, which is a square box, and the shaped gap 62 is formed inside the square box.

[0065] It can be understood that the supporting assembly 6 can include a plurality of supporting members 61, and the plurality of supporting members 61 support the diaphragm 200 from a plurality of positions on the outer periphery, and the internal space surrounded by the plurality of supporting members 61 forms the shaped gap 62.

[0066] Preferably, the guide rail 1 is provided with a limiting piece, when the first platform 2 is moved to abut against the limiting piece, the first platform 2 is located at the working position. After the diaphragm 200 and the plate body 300 are lifted by the supporting assembly 6, it is necessary to move the first platform 2 to the working position again. If the position of the first platform 2 at this time deviates from the position of the first platform 2 when the limiting piece 5 is recorded by the recorder, the final positioning accuracy will be affected. The limiting piece can provide a reference for the position of the first platform 2. When the first platform 2 is moved to the working position, the limiting piece abuts against the first platform 2, thereby ensuring the position accuracy of the first platform 2 at the working position.

[0067] The embodiment also provides a preforming method of a plate body, and a preforming device of the plate body is used for preforming the plate body 300, the preforming method comprises the following steps of:

[0068] S1, placing the workpiece 100 on the first platform 2 and positioning the workpiece 100 by using the limiting piece 5;

[0069] S2, moving the first platform 2 to the working position and recording the position of the limiting piece 5 by using the recorder;

[0070] S3, placing the diaphragm 200 on the second platform 3, moving the first platform 2 out of the working position, moving the second platform 3 to the working position, and placing the limiting piece 5 at the position recorded by the recorder;

[0071] S4, placing the plate body 300 on the diaphragm 200 and moving the plate body 300 to abut against the limiting piece 5 to complete the positioning of the plate body 300;

[0072] The limiting piece 5 can position the workpiece 100 on the first platform 2, and the position of the limiting piece 5 on the first platform 2 at the working position is recorded by using the recorder. After the second platform 3 is moved to the working position, the limiting piece 5 is placed at the position recorded by the recorder, and the plate body 300 is moved to abut against the limiting piece 5 to complete the positioning of the plate body 300. Through the transmission of the positioning information by the limiting piece 5 and the recorder, the accuracy of the relative position of the workpiece 100 and the plate body 300 at the working position can be ensured.

[0073] S5, covering another diaphragm 200 on the plate body 300, lifting the diaphragm 200 and the plate body 300, moving the second platform 3 out of the working position, and moving the first platform 2 to the working position;

[0074] S6, lowering the diaphragm 200 and the plate body 300 to the surface of the workpiece 100, and forming the plate body 300 on the workpiece 100 by using the double-diaphragm machine 4.

[0075] Two membranes 200 are respectively placed on both sides of the plate body 300 and tightly attached, when the plate body 300, the two membranes 200 and the workpiece 100 are located at the working position of the double membrane machine 4, the double membrane machine 4 is used to perform vacuum extraction on one side of the membrane 200 to drive the plate body 300 to bend and deform, gradually approach the workpiece 100, until the plate body 300 and the workpiece 100 are in surface fit.

[0076] Preferably, in step S2, recording the position of the positioning member 5 by the recorder comprises:

[0077] S21, manufacturing a first target hole 53 and a second target hole 54 on the positioning member 5, and recording the positions of the first target hole 53 and the second target hole 54;

[0078] S22, establishing a first reference plane on the surface of the positioning member 5;

[0079] S23, making a first straight line perpendicular to the first reference plane through the first target hole 53 or the second target hole 54;

[0080] S24, making a second straight line connecting the first target hole 53 and the second target hole 54;

[0081] S25, establishing a spatial coordinate system with the first straight line and the second straight line as coordinate axes, and obtaining the initial coordinates of the first target hole 53 and the second target hole 54 in the spatial coordinate system.

[0082] Marking the coordinates of the first target hole 53 and the second target hole 54 in the above-mentioned spatial coordinate system, since the laser tracker is stationary, the spatial coordinate system also remains unchanged, and the spatial coordinate system is a reference system with a fixed position. Since the membrane 200 and the plate body 300 can only rise and fall in the working position, as long as the horizontal position of the positioning member 5 in the coordinate system remains unchanged, the accuracy of positioning can be ensured.

[0083] Preferably, in step S3, placing the positioning member 5 at the position recorded by the recorder comprises:

[0084] S31, placing the positioning member 5 on the membrane 200;

[0085] S32, detecting the detection coordinates of the first target hole 53 and the second target hole 54 in the spatial coordinate system;

[0086] S33, moving the positioning member 5 until the horizontal and vertical coordinates of the detection coordinates of the first target hole 53 and the second target hole 54 coincide with the horizontal and vertical coordinates of the initial coordinates of the first target hole 53 and the second target hole 54.

[0087] After the second platform 3 is moved to the working position, only the first target hole 53 and the second target hole 54 of the positioning member 5 need to be coincided with the previously recorded coordinates in the vertical direction, and then the plate body 300 is moved to complete the positioning of the plate body 300, so as to ensure the accuracy of the relative position between the plate body 300 and the workpiece 100.

[0088] It can be understood that, in order to further improve the positioning accuracy, the workpiece 100 and the plate body 300 can be positioned by two positioning members 5. The two positioning members 5 are completely the same, so that the two positioning members 5 are centrally symmetric when positioning and position the plate body 300 or the workpiece 100 from opposite ends. After the first straight line, the second straight line and the first reference plane are established by scanning one of the positioning members 5 by the recording instrument, the other positioning member 5 is scanned by the same method to establish the third straight line, the fourth straight line and the second reference plane.

[0089] The first target hole 53 of the other positioning member 5 passes through the third straight line, and the second target hole 54 passes through the fourth straight line. The first target hole 53 and the second target hole 54 of the other positioning member 5 are projected along the normal direction to the first reference plane to obtain a first projection hole and a second projection hole, an X-axis is connected by the first target hole 53 of one positioning member 5 and the second projection hole of the other positioning member 5, a Z-axis is made through the X-axis and perpendicular to the first reference plane, and a coordinate system is established. In order to conform to the habit, the coordinate system is a right-handed coordinate system.

[0090] It is worth mentioning that, if the upper surface of the workpiece 100 is a horizontal plane, the first reference plane and the second reference plane are coplanar, and at this time the first projection hole is the first target hole 53 of the other positioning member 5, and the second projection hole is the second target hole 54 of the other positioning member 5.

[0091] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the description should not be understood as a limitation of the present application.

Claims

1. A preforming device of a plate body, characterized by, The utility model relates to a kind of preforming device and method for plate body, comprising: Rail (1), first platform (2) and second platform (3) are arranged on the rail (1) slidingly, the first platform (2) is used to carry workpiece (100), the second platform (3) is used to carry diaphragm (200) and plate body (300); Double diaphragm machine (4), the double diaphragm machine (4) is arranged between the first platform (2) and the second platform (3) and has working position, the first platform (2) and the second platform (3) can be moved to the working position, the double diaphragm machine (4) can be formed on the workpiece (100) on the plate body (300) in working position; Positioning mechanism, the positioning mechanism includes positioning member (5) and recorder, the positioning member (5) can position the workpiece (100), when the first platform (2) is located in the working position, the recorder can record the position of the positioning member (5), and the plate body (300) on the second platform (3) in the working position is positioned according to the position of the positioning member (5); The recorder is laser tracker, the positioning member (5) includes first target hole (53) and second target hole (54), the laser tracker can collect the position of first target hole (53), second target hole (54) and several points on the surface of the positioning member (5) and establish space coordinate system.

2. The preforming apparatus of a panel according to claim 1, characterized in that, The upper surface of the workpiece (100) is provided with a scale line (101), and the positioning member (5) is provided with a positioning end (51). The positioning member (5) can be attached to the upper surface of the workpiece (100), and the positioning end (51) is aligned with the scale line (101) to position the workpiece (100).

3. The preforming apparatus of a panel according to claim 2, characterized in that, The positioning end (51) is provided with a positioning protrusion (52), the scale line (101) includes a first groove (102), and the side wall of the plate body (300) is recessed to form a second groove (301). The positioning protrusion (52) matches the first groove (102) and can be clamped into the second groove (301).

4. The apparatus for preforming a panel of claim 1, wherein, The positioning mechanism includes at least two positioning members (5).

5. The apparatus for preforming a panel according to any one of claims 1 to 4, wherein The second platform (3) is provided with a supporting assembly (6), the supporting assembly (6) is provided with a forming gap (62), the supporting assembly (6) is located below the diaphragm (200), and the plate body (300) and the workpiece (100) can pass through the forming gap (62). When the second platform (3) moves to the working position, the double diaphragm machine (4) can lift the plate body (300) and the diaphragm (200) through the supporting assembly (6).

6. The apparatus for preforming a panel of claim 1, wherein, The rail (1) is provided with a limiting piece, and when the first platform (2) moves to abut against the limiting piece, the first platform (2) is located in the working position.

7. A method of preforming a panel body, characterized by, The preforming device and method for plate body, the preforming method comprises: S1, place workpiece (100) on the first platform (2), and position the workpiece (100) by using the positioning member (5); S2, moving the first platform (2) to a working position and recording the position of the positioning member (5) by a recorder; S3, placing a diaphragm (200) on the second platform (3), moving the first platform (2) out of the working position, moving the second platform (3) to the working position, and placing the positioning member (5) at the position recorded by the recorder; S4, placing a plate body (300) on the diaphragm (200), and moving the plate body (300) to abut against the positioning member (5) to complete positioning of the plate body (300); S5, placing another diaphragm (200) on the plate body (300), lifting the diaphragm (200) and the plate body (300), moving the second platform (3) out of the working position, and moving the first platform (2) to the working position; S6, lowering the diaphragm (200) and the plate body (300) to the surface of the workpiece (100), and using the double-diaphragm machine (4) to form the plate body (300) on the workpiece (100).

8. The method of preforming a panel body according to claim 7, wherein In step S2, recording the position of the positioning member (5) by the recorder comprises: S21, manufacturing a first target hole (53) and a second target hole (54) on the positioning member (5), and recording the positions of the first target hole (53) and the second target hole (54); S22, establishing a first reference plane on the surface of the positioning member (5); S23, making a first straight line perpendicular to the first reference plane through the first target hole (53) or the second target hole (54); S24, making a second straight line by connecting the first target hole (53) and the second target hole (54); S25, establishing a spatial coordinate system with the first straight line and the second straight line as coordinate axes, and obtaining initial coordinates of the first target hole (53) and the second target hole (54) in the spatial coordinate system.

9. The method of preforming a panel body according to claim 8, wherein, In step S3, placing the positioning member (5) at the position recorded by the recorder comprises: S31, placing the positioning member (5) on the diaphragm (200); S32, detecting detection coordinates of the first target hole (53) and the second target hole (54) in the spatial coordinate system; S33, moving the positioning member (5) until the horizontal and vertical coordinates of the detection coordinates of the first target hole (53) and the second target hole (54) coincide with the horizontal and vertical coordinates of the initial coordinates of the first target hole (53) and the second target hole (54).

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