Extrusion and flanging method for frame support of aircraft

Abstract

The application provides an aircraft frame support extrusion forming die and an extrusion flanging method. The aircraft frame support extrusion forming die comprises a lower die plate, a core block and an upper die plate. An extrusion groove is formed on the upper surface of the lower die plate, one side wall of the extrusion groove forms a first shaping surface, and the other side wall of the extrusion groove forms a first extrusion surface. The core block is matched with the extrusion groove in shape. One side wall of the core block forms a second shaping surface, and the other two side walls of the core block form a second extrusion surface. The upper die plate is provided with a flange protrusion, and the flange protrusion is matched with the extrusion groove and the core block in shape. The core block is vertically pressed into the extrusion groove, the first extrusion surface and the second extrusion surface abut each other and push and extrude the core block, so that a strip-shaped blank is processed into a frame support with a preset shape. The upper die plate is pressed into the extrusion groove, the flange protrusion and the upper surface of the core block abut each other to integrally bend and flange the upper edge of the frame support to complete the processing, and the problem of difficult processing of the aviation frame support in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of titanium alloy parts forming technology, and more specifically, to an extrusion forming die and extrusion flanging method for frame-type support parts for aircraft. Background Technology

[0002] Currently, titanium alloy fasteners are extensively used in the manufacturing of large aircraft to secure the fuselage and critical components. Among these, titanium alloy frame supports are the most frequently used fasteners. The central part of a frame support typically features a fastening section of a specific shape, while both ends have connecting ends that require slotted structures for piping passage. Simultaneously, the sides of the frame support require certain flanged structures. However, titanium alloy fasteners are difficult to bend and shape, placing high demands on processing technology and mold equipment. Existing processing molds are insufficient to produce frame supports that meet these requirements. Summary of the Invention

[0003] The main objective of this invention is to provide an extrusion molding die and an extrusion flanging method for aircraft frame support components, so as to at least solve the problem of difficult processing of aircraft frame support components in the prior art.

[0004] To achieve the above objectives, a first aspect of the present invention provides an extrusion molding die for a frame-type support component for aircraft, comprising a lower die, a core block, and an upper die; an extrusion groove is formed on the upper surface of the lower die, a first sidewall of the extrusion groove forms a first shaping surface, and a second sidewall of the extrusion groove forms a first extrusion surface, the first shaping surface and the first extrusion surface being opposite to each other along the plate surface direction of the lower die; the shape of the core block matches the shape of the extrusion groove, a first sidewall of the core block forms a second shaping surface, and a second sidewall of the core block forms a second extrusion surface, the second shaping surface and the second extrusion surface being opposite to each other along the plate surface direction of the core block. Yes; the lower surface of the upper template is provided with a folded edge protrusion, the shape of which matches the shape of the extrusion groove and the core block; the thickness of the core block is less than the depth of the extrusion groove. When the core block is pressed into the extrusion groove in the vertical direction, the first extrusion surface and the second extrusion surface abut against each other and push the core block in the horizontal direction to process the strip-shaped blank placed between the first shaping surface and the second shaping surface into a frame-like support of a preset shape; when the upper template moves downward in the vertical direction to press the folded edge protrusion into the extrusion groove, the folded edge protrusion abuts against the upper surface of the core block to bend and fold the upper edge of the frame-like support as a whole.

[0005] Furthermore, the first shaping surface includes an inner arc shaping surface located in the middle and two first straight edge shaping surfaces located on both sides thereon; the second shaping surface includes an outer arc shaping surface located in the middle and second straight edge shaping surfaces located on both sides thereon; wherein, the inner arc shaping surface and the outer arc shaping surface abut against each other to press an arc-shaped structure on the frame support member, and the two first straight edge shaping surfaces and the two second straight edge shaping surfaces abut against each other to press a straight edge structure on the frame support member.

[0006] Furthermore, the transition between the inner arc shaping surface and the two first straight edge shaping surfaces is an outer rounded corner structure; the transition between the outer arc shaping surface and the two second straight edge shaping surfaces is an inner rounded corner structure.

[0007] Furthermore, both first straight edge shaping surfaces have multiple groove structures, and both second straight edge shaping surfaces have multiple protrusion structures.

[0008] Furthermore, the angle between the first extrusion surface and the bottom surface of the extrusion groove is greater than 90°; the angle between the second extrusion surface and the lower surface of the core block is greater than 90°.

[0009] Furthermore, the angle between the first extrusion surface and the bottom surface of the extrusion groove is 95° to 100°; the angle between the second extrusion surface and the lower surface of the core block is 95° to 100°.

[0010] Furthermore, the sum of the thickness of the folded protrusion and the core block is equal to the depth of the extrusion groove.

[0011] The second aspect of the present invention provides an extrusion flanging method, which is applied to an extrusion molding die for a frame-type support component for an aircraft. The extrusion flanging method includes: placing a strip-shaped blank into an extrusion groove on the upper surface of a lower template, with one side of the strip-shaped blank in close contact with a first shaping surface on the extrusion groove; heating the strip-shaped blank and manually hammering it to make its middle part arc-shaped, corresponding to the shape of the first shaping surface; pressing a core block vertically into the extrusion groove, with the second extrusion surface of the core block abutting against the first extrusion surface on the extrusion groove and pushing the core block horizontally; after being pushed horizontally, the second shaping surface on the core block abutting against the first shaping surface and extruding the strip-shaped blank to shape it into a frame-type support component of a preset shape; heating and manually hammering the portion of the frame-type support component that protrudes above the extrusion groove to make it slightly folded forward; then pressing the side of the upper template with the folded edge protrusion vertically into the extrusion groove, with the folded edge protrusion abutting against the core block and bending and flanging the upper edge of the frame-type support component as a whole.

[0012] The present invention provides an extrusion molding die for a frame-type support component for aircraft, comprising a lower die, a core block, and an upper die. An extrusion groove is formed on the upper surface of the lower die; a first sidewall of the extrusion groove forms a first shaping surface, and a second sidewall of the extrusion groove forms a first extrusion surface. The first shaping surface and the first extrusion surface are opposite to each other along the plate surface direction of the lower die. The core block's shape matches the shape of the extrusion groove; a first sidewall of the core block forms a second shaping surface, and a second sidewall of the core block forms a second extrusion surface. The second shaping surface and the second extrusion surface are opposite to each other along the plate surface direction of the core block. A folded edge protrusion is provided on the lower surface of the upper die. The shape of the core block matches the shape of the extrusion groove and the core block. The thickness of the core block is less than the depth of the extrusion groove. When the core block is pressed into the extrusion groove in the vertical direction, the first extrusion surface and the second extrusion surface abut against each other and push the core block in the horizontal direction to process the strip-shaped blank placed between the first shaping surface and the second shaping surface into a frame-like support of a preset shape. When the upper template moves downward in the vertical direction and the folded edge protrusion is pressed into the extrusion groove, the folded edge protrusion abuts against the upper surface of the core block to bend and fold the upper edge of the frame-like support as a whole, which solves the problem of difficult processing of aerospace frame-like support in the prior art. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0014] Figure 1 This is an exploded view of the main structure of an extrusion molding die for a frame support component for an aircraft, which is an optional embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the lower template structure of an extrusion molding die for a frame support component for an aircraft, which is optional according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the core block structure of an extrusion molding die for a frame support component for an aircraft, which is optional according to an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the upper template structure of an extrusion molding die for a frame support component for an aircraft, which is optional according to an embodiment of the present invention.

[0018] Figure 5 This is a right-side enlarged view of an extrusion molding die for a frame support component for an aircraft, which is optional according to an embodiment of the present invention.

[0019] The above figures include the following reference numerals:

[0020] 10. Lower template; 11. Extrusion groove; 12. First shaping surface; 121. Inner arc shaping surface; 122. First straight edge shaping surface; 123. Groove structure; 13. First extrusion surface; 14. Outer rounded corner structure; 20. Core block; 21. Second shaping surface; 211. Outer arc shaping surface; 212. Second straight edge shaping surface; 213. Protrusion structure; 22. Second extrusion surface; 23. Inner rounded corner structure; 30. Upper template; 31. Folded edge protrusion; 40. Frame support component. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] According to an embodiment of the present invention, an extrusion molding die for a frame-type support member for an aircraft is provided, such as... Figure 1As shown, the assembly includes a lower template 10, a core block 20, and an upper template 30. The upper surface of the lower template 10 has an extrusion groove 11. The first sidewall of the extrusion groove 11 forms a first shaping surface 12, and the second sidewall forms a first extrusion surface 13. The first shaping surface 12 and the first extrusion surface 13 are opposite to each other along the plate surface direction of the lower template 10. The core block 20 has a shape that matches the shape of the extrusion groove 11. The first sidewall of the core block 20 forms a second shaping surface 21, and the second sidewall forms a second extrusion surface 22. The second shaping surface 21 and the second extrusion surface 22 are opposite to each other along the plate surface direction of the core block 20. The lower surface of the upper template 30 has a folded edge protrusion 31, and one corner of the upper template 30 has a notched corner structure. This notched corner structure is used during processing. When the templates are stacked and only the back of each template is visible, the upper and lower templates can be distinguished by this feature; the shape of the folded edge protrusion 31 matches the shape of the extrusion groove 11 and the core block 20; wherein, the thickness of the core block 20 is less than the depth of the extrusion groove 11. When the core block 20 is pressed into the extrusion groove 11 in the vertical direction, the first extrusion surface 13 and the second extrusion surface 22 abut against each other and push the core block 20 in the horizontal direction to process the strip blank placed between the first shaping surface 12 and the second shaping surface 21 into a frame-like support 40 of a preset shape; when the upper template 30 moves downward in the vertical direction to press the folded edge protrusion 31 into the extrusion groove 11, the folded edge protrusion 31 abuts against the upper surface of the core block 20 to bend and fold the upper edge of the frame-like support 40 as a whole.During the specific processing, the lower template 10 is placed on a hydraulic table, and the strip-shaped blank is placed into the extrusion groove 11 on the lower template 10, closely adhering to the first shaping surface 12 on the first side wall of the extrusion groove 11. Then, the strip-shaped blank is heated by a welding torch, and the strip-shaped blank is manually hammered to the middle part of the strip-shaped blank so that this part is arc-shaped and close to the middle part of the first shaping surface 12. The next step is to use a hydraulic press to press the core block 20 vertically downward toward the extrusion groove 11 that matches its shape. During the pressing process, the second shaping surface 21 of the core block 20 and the first shaping surface 12 of the extrusion groove 11 are close to each other. The second extrusion surface 22 of the core block 20 and the first extrusion surface 13 of the extrusion groove 11 are both sloped surfaces, and they are opposite slopes. Therefore, when the first extrusion surface 13 and the second extrusion surface 22 abut against each other, the core block 20 will be extruded forward in the horizontal direction. The shaping surface 21 will be close to the first shaping surface 12 to extrude and form the strip blank. At this point, the strip blank is initially processed into a frame support 40. Finally, the left and right sides of the initially processed frame support 40 are slightly higher than the extrusion groove 11 and the core block 20. This part needs to be folded. At this time, the frame support 40 is heated with a welding gun. Then, the part of the frame support 40 that is higher than the extrusion groove 11 and the core block 20 is roughly hammered by hand to make it bend slightly forward. After the hammering and bending are completed, the upper template 30 is pressed down vertically by a hydraulic press. The folded edge protrusion 31 on the lower surface of the upper template 30 is pressed into the extrusion groove 11. When the folded edge protrusion 31 abuts against the core block 20, the folding edge processing of the frame support 40 is completed. This processing is completed, which solves the problem of difficult processing of aviation frame support parts in the prior art.

[0023] In specific implementation, such as Figure 2 and Figure 3 As shown, the first shaping surface 12 includes an inner arc shaping surface 121 located in the middle and two first straight edge shaping surfaces 122 located on both sides thereon; the second shaping surface 21 includes an outer arc shaping surface 211 located in the middle and two second straight edge shaping surfaces 212 located on both sides thereon; during operation, the two end faces of the frame support member 40 in the middle are close to the inner arc shaping surface 121 on one side and close to the outer arc shaping surface 211 on the other side, and the straight edges on both sides of the frame support member 40 abut against the two first straight edge shaping surfaces 122 and the second straight edge shaping surfaces 21. 2. The middle part is pressed into an arc structure on the frame support 40 by the inner arc shaping surface 121 and the outer arc shaping surface 211 abutting each other. The straight edges on both sides are pressed into a straight edge structure on the frame support 40 by the two first straight edge shaping surfaces 122 and the two second straight edge shaping surfaces 212 abutting each other. The matching inner arc shaping surface 121 and outer arc shaping surface 211, first straight edge shaping surface 122 and second straight edge shaping surface 212 can reduce various problems caused by the displacement of the frame support 40 during processing.

[0024] In specific implementation, such as Figure 2 and Figure 3As shown, the transition between the inner arc shaping surface 121 and the two first straight edge shaping surfaces 122 is an outer rounded corner structure 14; the transition between the outer arc shaping surface 211 and the two second straight edge shaping surfaces 212 is an inner rounded corner structure 23. This design makes the mold fit the shape of the frame support 40 better and avoids excessive extrusion or displacement of the workpiece during processing, which could lead to operational errors.

[0025] In specific implementation, such as Figure 2 and Figure 3 As shown, both first straight edge shaping surfaces 122 have multiple groove structures 123, and both second straight edge shaping surfaces 212 have multiple protrusion structures 213. The positions of the multiple groove structures 123 on the two first straight edge shaping surfaces 122 and the positions of the multiple protrusion structures 213 on the two second straight edge shaping surfaces 212 correspond to each other. During operation, the two abut against each other to form the corresponding shape on the frame support 40.

[0026] In specific implementation, such as Figure 2 and Figure 3 As shown, the angle between the first extrusion surface 13 and the bottom surface of the extrusion groove 11 is greater than 90°; the angle between the second extrusion surface 22 and the lower surface of the core block 20 is greater than 90°. This design allows the second extrusion surface 22 to slide forward when it comes into contact with the first extrusion surface 13, so that the core block 20 is pushed forward when it moves horizontally downward.

[0027] In specific implementation, such as Figure 2 and Figure 3 As shown, the angle between the first extrusion surface 13 and the bottom surface of the extrusion groove 11 is 95° to 100°; the angle between the second extrusion surface 22 and the lower surface of the core block 20 is 95° to 100°. During operation, the core block 20 is placed into the extrusion groove 11, and the second extrusion surface 22 will slide downward when it comes into contact with the first extrusion surface 13 and push the second shaping surface 21 toward the first shaping surface 12, so that the strip blank is extruded and formed, avoiding displacement of the strip blank during operation and deformation.

[0028] In specific implementation, such as Figure 4 and Figure 5 As shown, the sum of the thickness of the folded edge protrusion 31 and the core block 20 is equal to the depth of the extrusion groove 11. During operation, after the core block 20 is placed into the extrusion groove 11, the remaining space of the extrusion groove 11 matches the shape of the folded edge protrusion 31. This design prevents the folded edge of the frame support 40 from being excessively folded and extruded, leading to breakage and deformation.

[0029] According to an embodiment of the present invention, the extrusion flanging method is applied to an extrusion molding die for a frame support component for an aircraft. The extrusion flanging method includes: placing a strip-shaped blank into an extrusion groove 11 on the upper surface of a lower template 10, with one side of the strip-shaped blank in close contact with a first shaping surface 12 on the extrusion groove 11; heating the strip-shaped blank and manually hammering it to make its middle part arc-shaped, corresponding to the shape of the first shaping surface 12; pressing a core block 20 vertically into the extrusion groove 11, with the second extrusion surface 22 of the core block 20 abutting against the first extrusion surface 13 on the extrusion groove 11 and pushing the core block horizontally. 20. After being pushed horizontally, the second shaping surface 21 on the core block 20 abuts against the first shaping surface 12 and extrudes the strip blank to form a frame support 40 of a preset shape. The part of the frame support 40 that is higher than the extrusion groove 11 is heated and manually hammered to make it fold slightly forward. Then, the side of the upper template 30 with the folded edge protrusion 31 is pressed into the extrusion groove 11 in the vertical direction. The folded edge protrusion 31 abuts against the core block 20 and bends the upper edge of the frame support 40 as a whole. This extrusion and folding method is relatively simple to operate and reduces the probability of errors in processing.

[0030] To illustrate the working principle of this invention using a practical application example, firstly, the lower template 10 is placed on a hydraulic table, and then the strip-shaped blank is placed into the extrusion groove 11 opened on the upper surface of the lower template 10. The strip-shaped blank is tightly attached to the first shaping surface 12 on the first side wall of the extrusion groove 11. After the strip-shaped blank is heated by a welding torch, it is manually and slightly hammered to make the middle part of the strip-shaped blank arc-shaped and close to the inner arc shaping surface 121 in the middle of the first shaping surface 12. The straight edges on both sides of the strip-shaped blank abut against the first straight edge shaping surfaces 122 on both sides of the first shaping surface 12. Next, the core block 20 is vertically pushed downward into the extrusion groove 11 that matches its shape using a hydraulic press. At the same time, because the first straight edge shaping surface 122 on both sides of the core block 20... The angle between the second extrusion surface 22 and the lower surface of the core block 20 is 95° to 100°, and the angle between the first extrusion surface 13 in the extrusion groove 11 and the bottom surface of the extrusion groove 11 is 95° to 100°. Therefore, when the core block 20 moves downward, when the first extrusion surface 13 and the second extrusion surface 22 abut, the core block 20 will slide forward due to this angle design, so that the outer arc plastic surface 211 in the middle of the second plastic surface 21 on the core block 20 and the second straight edge plastic surfaces 212 on both sides abut against the corresponding matching inner arc plastic surface 121 and the first straight edge plastic surface 122 and extrude the strip blank. Each of the first straight-edge shaping surfaces 122 has multiple groove structures 123, and each of the second straight-edge shaping surfaces 212 on both sides of the second shaping surface 21 has multiple protrusion structures 213. Therefore, when the strip blank is extruded by the first shaping surface 12 and the second shaping surface 21, the groove structures 123 and the protrusion structures 213 match and abut against each other. At the same time, the transition inner arc shaping surface 121 abuts against the outer rounded corner structure 14 of the two first straight-edge shaping surfaces 122 and the transition outer arc shaping surface 211 abuts against the inner rounded corner structure 23 of the two second straight-edge shaping surfaces 212, so that corresponding grooves are extruded on the straight edges on both sides of the strip blank. At this time, the strip blank has been initially processed into a frame-like support 4. 0; After the above processing, the frame support 40 is basically formed, but a part is slightly higher than the side wall of the extrusion groove 11 and the height of the core block 20. At this time, the part of the frame support 40 that is higher is heated with a welding gun and then manually hammered to make it slightly fold forward. Then, the upper template 30 is pushed down by a hydraulic press, so that the folded edge protrusion 31 on the lower surface of the upper template 30 moves into the extrusion groove 11 that matches its shape. Since the sum of the thickness of the folded edge protrusion 31 and the core block 20 is equal to the depth of the extrusion groove 11, when the folded edge protrusion 31 and the core block 20 abut, the slightly folded end of the frame support 40 is squeezed into a right-angle folded edge. At this point, the processing of the frame support 40 is completed.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An extrusion die for a frame-type support component for an aircraft, characterized in that, include: The lower template (10) has an extrusion groove (11) on its upper surface. The first sidewall of the extrusion groove (11) forms a first shaping surface (12), and the second sidewall of the extrusion groove (11) forms a first extrusion surface (13). The first shaping surface (12) and the first extrusion surface (13) are opposite to each other along the plate surface direction of the lower template (10). Core block (20), the shape of the core block (20) matches the shape of the extrusion groove (11), the first sidewall of the core block (20) forms a second shaping surface (21), the second sidewall of the core block (20) forms a second extrusion surface (22), the second shaping surface (21) and the second extrusion surface (22) are opposite to each other along the plate surface direction of the core block (20); The upper template (30) has a folded edge protrusion (31) on its lower surface, and one corner of the upper template (30) is a notched corner structure; the shape of the folded edge protrusion (31) matches the shape of the extrusion groove (11) and the core block (20); Wherein, the thickness of the core block (20) is less than the depth of the extrusion groove (11). When the core block (20) is pressed into the extrusion groove (11) in the vertical direction, the first extrusion surface (13) and the second extrusion surface (22) abut against each other and push the core block (20) in the horizontal direction to process the strip blank placed between the first shaping surface (12) and the second shaping surface (21) into a frame support (40) of a preset shape. When the upper template (30) moves downward in the vertical direction to press the folded edge protrusion (31) into the extrusion groove (11), the folded edge protrusion (31) abuts against the upper surface of the core block (20) to bend and fold the upper edge of the frame support (40) as a whole. Wherein, the included angle between the first extrusion surface (13) and the bottom surface of the extrusion groove (11) is greater than 90°. The included angle between the second extrusion surface (22) and the lower surface of the core block (20) is greater than 90°.

2. The extrusion molding die for frame-type support components for aircraft according to claim 1, characterized in that, The first shaping surface (12) includes an inner arc shaping surface (121) located in the middle and two first straight edge shaping surfaces (122) located on both sides thereon; the second shaping surface (21) includes an outer arc shaping surface (211) located in the middle and second straight edge shaping surfaces (212) located on both sides thereon. The inner arc shaping surface (121) and the outer arc shaping surface (211) abut against each other to press an arc structure on the frame support (40), and the two first straight edge shaping surfaces (122) and the two second straight edge shaping surfaces (212) abut against each other to press a straight edge structure on the frame support (40).

3. The extrusion molding die for aircraft frame supports according to claim 2, characterized in that, The transition between the inner arc shaping surface (121) and the two segments of the first straight edge shaping surface (122) is an outer rounded corner structure (14); the transition between the outer arc shaping surface (211) and the two segments of the second straight edge shaping surface (212) is an inner rounded corner structure (23).

4. The extrusion molding die for frame-type support components for aircraft according to claim 2, characterized in that, Both of the first straight-edge shaping surfaces (122) have multiple groove structures (123), and both of the second straight-edge shaping surfaces (212) have multiple protrusion structures (213).

5. The extrusion molding die for a frame support for an aircraft according to claim 1, wherein the angle between the first extrusion surface (13) and the bottom surface of the extrusion groove (11) is 95° to 100°; and the angle between the second extrusion surface (22) and the lower surface of the core block (20) is 95° to 100°.

6. The extrusion molding die for a frame-type support component for an aircraft according to claim 1, characterized in that, The sum of the thickness of the folded protrusion (31) and the core block (20) is equal to the depth of the extrusion groove (11).

7. A method for extruding and flanging, characterized in that, The extrusion flanging method is applied to the extrusion forming mold of the aircraft frame support member according to any one of claims 1 to 6, and the extrusion flanging method includes: Place the strip blank into the extrusion groove (11) on the upper surface of the lower template (10), with one side of the strip blank in close contact with the first shaping surface (12) on the extrusion groove (11). Then heat the strip blank and manually hammer it to make the middle part arc-shaped, corresponding to the shape of the first shaping surface (12). The core block (20) is pressed vertically into the extrusion groove (11). The second extrusion surface (22) of the core block (20) abuts against the first extrusion surface (13) on the extrusion groove (11) and pushes the core block (20) horizontally. After being pushed horizontally, the second shaping surface (21) on the core block (20) abuts against the first shaping surface (12) and extrudes the strip blank to deform it into the frame support member (40) of the preset shape. The portion of the frame support (40) that extends above the extrusion groove (11) is heated and manually hammered to make it fold slightly forward. Then, the side of the upper template (30) with the folded edge protrusion (31) is pressed vertically into the extrusion groove (11). The folded edge protrusion (31) abuts against the core block (20) and the upper edge of the frame support (40) is bent and folded as a whole.

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