Fork earhole lug piece extrusion strengthening device

Abstract

The invention relates to a fork earhole lug piece extrusion strengthening device which comprises a fixing base, two extrusion rods, two transmission parts and a force application part, the force application part moves in the first direction to drive the two transmission parts to be far away from each other in the axial direction of an assembly hole, the two transmission parts transmit force to the extrusion rods connected with the transmission parts at the same time, and the extrusion rods are fixed to the fixing base. And the two extrusion rods move in the axial direction of the assembly hole and move in the opposite directions, so that the hole wall of the assembly hole is extruded, a uniform residual stress field is formed on the hole wall of the assembly hole, and the fatigue life of the lug piece of the fork lug hole is prolonged. Meanwhile, the two assembly holes of the fork lug hole lug piece are extruded and strengthened at the same time, the extrusion strengthening efficiency is improved, the consistency of the extrusion effect on the two assembly holes is ensured, uniform and symmetrical residual stress fields are formed on the walls of the assembly holes, the service life of the fork lug hole lug piece is prolonged, and the production cost is reduced. And the consistency of the fatigue performance of the double holes in service can be ensured.

Description

Technical Field

[0001] This application relates to the field of extrusion strengthening technology, and in particular to an extrusion strengthening device for fork-shaped earpieces. Background Technology

[0002] Many components of aircraft have lugs, and certain components are connected and assembled by fasteners installed in two mounting holes in the lugs. During the service life of an aircraft, these mounting holes are often subjected to alternating load impacts, causing stress concentration in the lugs. This makes the hole walls prone to cracking, which in turn reduces the fatigue performance of the components and shortens their service life.

[0003] To address the aforementioned issues, cold extrusion strengthening of perforated structural parts using solid extrusion bars with a certain interference fit is a widely used strengthening technique in the aerospace industry. Direct extrusion strengthening, in particular, is widely applied due to its low cost, simplicity, high efficiency, and applicability to holes in aircraft components.

[0004] In related technologies, due to the structural characteristics of the fork-shaped lug, it is difficult to extrude two assembly holes at the same time. Extrusion strengthening separately is less efficient and increases the cost of extrusion strengthening process. Furthermore, extruding the assembly holes one by one cannot guarantee the consistency of fatigue performance between the two assembly holes, thereby reducing the reliability and stability of fatigue strengthening of fork-shaped lug parts. Summary of the Invention

[0005] Therefore, it is necessary to provide a fork-hole ear plate extrusion strengthening device to address the problems of poor strengthening efficiency and quality of existing extrusion devices.

[0006] A fork-shaped lug extrusion strengthening device, wherein the fork-shaped lug has two protruding portions, each of which is provided with an assembly hole; the fork-shaped lug extrusion strengthening device comprises:

[0007] The fixing seat is used to fix the fork ear hole ear piece;

[0008] Two extrusion bars are located between the two mounting holes of the fork lug plate and are coaxially arranged with the mounting holes.

[0009] Two transmission components are connected to the two extrusion bars in a one-to-one correspondence and are located between the two extrusion bars;

[0010] A force-applying member is configured to be operablely movable along a first direction to drive the two transmission members to move away from each other along the axial direction of the mounting hole, so that the extrusion bar extrudes and passes through the mounting hole on the corresponding side.

[0011] In one embodiment, the force-applying member is constructed with a first inclined surface, and the transmission member is constructed with a second inclined surface; the second inclined surfaces of the two transmission members are symmetrically distributed;

[0012] When the force-applying component moves along the first direction, the two transmission components are driven to move in opposite directions through the sliding engagement between the first inclined surface and the second inclined surface.

[0013] In one embodiment, one of the transmission member and the extrusion bar is provided with a connecting hole, and the other is provided with a connecting block connected to the connecting hole.

[0014] In one embodiment, the extrusion bar is configured with the connecting hole, which is coaxial with the assembly hole.

[0015] In one embodiment, the fixed base is configured with a transmission mating hole, at least a portion of the transmission member is located in the transmission mating hole; the transmission mating hole is coaxial with the connecting hole.

[0016] In one embodiment, the fixing base includes a tooling base having two first receiving holes, the two first receiving holes being used to receive the two protrusions of the fork ear plate respectively.

[0017] In one embodiment, the fixing base further includes a limiting cover detachably connected to the tooling base, the limiting cover being arranged along a second direction with the tooling base and abutting against the fork lug.

[0018] In one embodiment, one of the limiting cover and the fork-shaped ear piece is provided with a limiting groove, and the other is engaged with the limiting groove.

[0019] In one embodiment, the extrusion bar includes an extrusion section and guide sections distributed at both axial ends of the extrusion section, wherein the cross-sectional area of ​​the guide sections gradually increases from the direction of the guide sections toward the extrusion section.

[0020] In one embodiment, a transition fillet is provided between the extrusion section and the guide section;

[0021] And / or, the end of the guide section opposite to the extrusion section is provided with a transition fillet;

[0022] And / or, the axial length of the extrusion section is greater than the axial depth of the assembly hole.

[0023] The aforementioned fork-ear hole lug extrusion strengthening device, through the movement of the force-applying component along a first direction, drives two transmission components to move away from each other along the axial direction of the assembly hole. The two transmission components simultaneously transmit force to the connected extrusion rods, causing the two extrusion rods to move along the axial direction of the assembly hole in opposite directions. This extrusion compresses the hole wall, creating a uniform residual stress field and extending the fatigue life of the fork-ear hole lug. Simultaneously, it achieves extrusion strengthening of both assembly holes of the fork-ear hole lug, improving the efficiency of extrusion strengthening and ensuring the consistency of the extrusion effect on the two assembly holes. This results in a uniform and symmetrical residual stress field on the assembly hole wall, extending the service life of the fork-ear hole lug and ensuring consistent fatigue performance of the two holes during service. Attached Figure Description

[0024] Figure 1 This is a perspective view of a fork-shaped ear plate compression strengthening device provided in an embodiment of this application.

[0025] Figure 2 for Figure 1 The cross-sectional view of the fork-shaped lug extrusion reinforcement device shown.

[0026] Figure 3 for Figure 2 A schematic diagram of the fixing seat in the fork-shaped lug extrusion strengthening device shown.

[0027] Figure 4 for Figure 2 A schematic diagram of the extrusion bar in the fork-shaped lug extrusion strengthening device shown.

[0028] Figure 5 for Figure 1 A partial schematic diagram of the fixing seat in the fork-shaped lug extrusion strengthening device shown.

[0029] Figure 6 This is a schematic diagram of a forked ear hole provided in an embodiment of this application.

[0030] Reference numerals: 100, fixed base; 110, tooling base; 111, extrusion through hole; 112, force application mating hole; 113, transmission mating hole; 114, first receiving hole; 120, limiting cover; 121, limiting groove; 122, connecting part; 200, extrusion bar; 210, connecting hole; 220, extrusion section; 230, guide section; 240, transition fillet; 300, transmission component; 310, second inclined surface; 320, connecting block; 400, force application component; 410, first inclined surface; 1000, fork ear hole lug; 1100, protrusion; 1110, assembly hole. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] Many aircraft components feature lugs with forked holes, which are used to connect and assemble specific components by installing fasteners in two mounting holes within these lugs. During aircraft service, these mounting holes are often subjected to alternating load impacts, causing stress concentration in the lugs and making the hole walls prone to cracking. This reduces the fatigue performance of the components and shortens their service life. To address this issue, cold extrusion strengthening of perforated structural parts using a solid extrusion bar with a certain interference fit is a widely used strengthening technique in the aerospace industry. However, due to the structural characteristics of lugs, simultaneously extruding both mounting holes is difficult. Extruding them separately is inefficient and increases the cost of the extrusion strengthening process. Furthermore, extruding each mounting hole individually cannot guarantee the consistency of fatigue performance between the two holes, thus reducing the reliability and stability of fatigue strengthening for lug-type parts.

[0038] Based on this, an embodiment of this application provides a fork-shaped lug extrusion strengthening device that can solve the above-mentioned technical problems. The fork-shaped lug extrusion strengthening device provided in an embodiment of this application will be described in detail below with reference to the accompanying drawings.

[0039] See Figures 1 to 3 As shown, an embodiment of this application provides a fork-shaped lug extrusion strengthening device for extruding and strengthening the fork-shaped lug 1000, such as... Figure 6As shown, the fork lug 1000 has two protrusions 1100, each protrusion 1100 having a mounting hole 1110; the fork lug extrusion strengthening device includes a fixed base 100, two extrusion rods 200, two transmission members 300, and a force-applying member 400. The fixed base 100 is used to fix the fork lug 1000; the two extrusion rods 200 are located between the two mounting holes 1110 of the fork lug 1000 and are coaxially arranged with the mounting holes 1110; the two transmission members 300 are connected to the two extrusion rods 200 one-to-one and are located between the two extrusion rods 200; the force-applying member 400 is configured to be operablely movable along a first direction to drive the two transmission members 300 to move away from each other along the axial direction of the mounting holes 1110, so that the extrusion rods 200 extrude and pass through the mounting holes 1110 on the corresponding side. Figure 2 As shown, the first direction is indicated by arrow X, and the axial direction of the mounting hole 1110 is indicated by arrow Z. In some embodiments, the first direction is horizontal, and the axial direction of the mounting hole 1110 is vertical.

[0040] The aforementioned fork-ear hole lug extrusion strengthening device, through the movement of the force-applying member 400 along the first direction, drives two transmission members 300 to move away from each other along the axial direction of the assembly hole 1110. The two transmission members 300 simultaneously transmit force to the connected extrusion rods 200, causing the two extrusion rods 200 to move along the axial direction of the assembly hole 1110 in opposite directions, thereby extruding the hole wall of the assembly hole 1110. This results in a uniform residual stress field forming on the hole wall of the assembly hole 1110, extending the fatigue life of the fork-ear hole lug 1000. Simultaneously, it achieves simultaneous extrusion strengthening of both assembly holes 1110 of the fork-ear hole lug 1000, not only improving the efficiency of extrusion strengthening but also ensuring the consistency of the extrusion effect on the two assembly holes 1110. This results in a uniform and symmetrical residual stress field forming on the wall of the assembly hole 1110, extending the service life of the fork-ear hole lug 1000 and ensuring the consistency of the fatigue performance of the two holes during service. Understandably, the first direction is the radial direction of the mounting hole 1110, which is perpendicular to the axial direction of the mounting hole 1110.

[0041] See Figure 2 and Figure 3As shown, the fixing base 100 is configured with a pressing through hole 111. On the one hand, the pressing through hole 111 is used to insert the pressing rod 200; on the other hand, the pressing through hole 111 provides space for the pressing rod 200 to move axially. In some embodiments, the number of pressing through holes 111 corresponds to the number of pressing rods 200, that is, two pressing through holes 111 are provided. In other embodiments, only one pressing through hole 111 may be provided, that is, the pressing through hole 111 may be a through hole that extends axially. In some embodiments, the fixing base 100 is also configured with a force-applying fitting hole 112, which extends along a first direction, and the force-applying member 400 can move along the force-applying fitting hole 112. In some embodiments, the shaft-hole fitting accuracy between the force-applying member 400 and the force-applying fitting hole 112 is IT8 grade.

[0042] In some embodiments, the force-applying component 400 can be connected to a force-applying device, such as a hydraulic testing machine. The pressure plate of the hydraulic testing machine contacts the force-applying component 400, applying pressure to push the force-applying component 400 to move along the first direction. Alternatively, the force-applying device can be other linear output devices, such as a linear motor, whose output end abuts against the force-applying component 400, driving the force-applying component 400 to move. Understandably, the selection of the force-applying device is not limited to these, as long as it enables the force-applying component 400 to move along the first direction.

[0043] See Figure 2 As shown, in one embodiment, the force-applying member 400 is constructed with a first inclined surface 410, and the transmission member 300 is constructed with a second inclined surface 310; the second inclined surfaces 310 of the two transmission members 300 are symmetrically distributed; when the force-applying member 400 moves along a first direction, the two transmission members 300 are driven to move in opposite directions through the sliding engagement between the first inclined surface 410 and the second inclined surface 310. For example, in the embodiment shown in the figure, when the force-applying member 400 moves to the left, it pushes the transmission member 300 located on the upper side to move upward, and at the same time pushes the transmission member 300 located on the lower side to move downward, thereby driving the upper extrusion rod 200 to move upward and the lower extrusion rod 200 to move downward, thereby achieving simultaneous extrusion strengthening of the two assembly holes 1110. At the same time, the friction between the first inclined surface 410 and the second inclined surface 310 helps to resist external vibration or impact, maintaining the stability and reliability of the device.

[0044] Furthermore, by setting the angles of the first inclined plane 410 and the second inclined plane 310, the input force can be significantly amplified. For example, in the embodiment shown in the attached figure, a small horizontal force, after being transmitted through the inclined planes, can generate a large thrust in the vertical direction. Moreover, this transmission method is more compact, reducing the space occupied by the device.

[0045] In some embodiments, the flatness of the first inclined surface 410 and the second inclined surface 310 is 0.01 mm.

[0046] In other embodiments, the force-applying member 400 may have a first swing arm and a second swing arm fixedly connected to the first swing arm at an angle to both sides along the axial direction of the mounting hole 1110. The second swing arm is connected to the transmission member 300 on the corresponding side. When the force-applying member 400 moves in the first direction, it drives the first swing arm to rotate. Since the angle between the first and second swing arms is fixed, it drives the second swing arm to swing, thereby driving the transmission member 300 connected to the second swing arm to move axially.

[0047] See Figure 2 As shown, in one embodiment, one of the transmission member 300 and the extrusion rod 200 is provided with a connecting hole 210, and the other is provided with a connecting block 320 connected to the connecting hole 210. For example, in the embodiment shown in the figure, the transmission member 300 is provided with a connecting block 320, and the extrusion rod 200 is provided with a connecting hole 210. The detachable connection between the transmission member 300 and the extrusion rod 200 is achieved through the cooperation of the connecting block 320 and the connecting hole 210. In other embodiments, the positions of the connecting hole 210 and the connecting block 320 can be interchanged, that is, both the transmission member 300 and the extrusion rod 200 are provided with a connecting hole 210. In some embodiments, the extrusion rod 200 and the transmission member 300 can be threaded, that is, the connecting hole 210 is a threaded hole, and the connecting block 320 is provided with external threads. Threaded connections can complete installation and disassembly without complex tools, improving assembly efficiency. In other embodiments, the connecting hole 210 and the connecting block 320 can also be keyed, pinned, or otherwise connected.

[0048] See Figure 2 As shown, in one embodiment, the extrusion rod 200 is configured with a connecting hole 210, which is coaxial with the assembly hole 1110. This coaxial arrangement ensures that the applied extrusion pressure is evenly distributed on the wall of the assembly hole 1110, avoiding localized overload or stress concentration caused by misalignment, thus ensuring consistent extrusion strengthening effect. Uniform pressure distribution also helps reduce surface defects such as cracks on the wall of the assembly hole 1110.

[0049] See Figure 2 and Figure 3 As shown, in one embodiment, the fixed base 100 is configured with a transmission mating hole 113, and at least a portion of the transmission member 300 is located in the transmission mating hole 113; the transmission mating hole 113 is coaxial with the connecting hole 210. Understandably, the diameter of the transmission mating hole 113 is adapted to the outer diameter of the transmission member 300. Since the transmission mating hole is coaxial with the connecting hole 210, that is, the transmission member 300 is coaxial with the extrusion rod 200, local stress concentration or uneven deformation caused by eccentricity can be avoided. When the relevant components are all in a coaxial state, unnecessary friction and wear are reduced, extending the service life of the extrusion rod 200.

[0050] See Figure 2 and Figure 3 As shown, in some embodiments, the diameter of the transmission member 300 and the shaft hole of the transmission mating hole 113 have a mating accuracy of IT8 grade. In some embodiments, the difference between the diameter of the transmission member 300 and the diameter of the transmission mating hole 113 is less than 0.01 mm, ensuring the guiding and centering function of the transmission member 300 and improving the extrusion strengthening effect. In some embodiments, the axis of the transmission mating hole 113 is perpendicular to and coplanar with the axial direction of the aforementioned force-applying mating hole 112.

[0051] See Figures 1 to 3 As shown, in one embodiment, the fixing base 100 includes a tooling base 110, which has two first receiving holes 114 for receiving two protrusions 1100 of the fork-ear hole lug 1000. In some embodiments, the size of the first receiving hole 114 is perfectly matched with the toothed edge of the protrusion 1100 of the fork-ear hole lug 1000, with a fit tolerance of less than 0.01 mm. This arrangement prevents the risk of displacement of the fork-ear hole lug 1000 during extrusion strengthening and reduces the possibility of eccentric extrusion.

[0052] See Figure 1 and Figure 5 As shown, in one embodiment, the fixing base 100 further includes a limiting cover 120 detachably connected to the tooling base 110. The limiting cover 120 and the tooling base 110 are arranged along a second direction and abut against the fork lug plate 1000. Figure 1 The arrow Y indicates the second direction. It can be understood that any two of the second direction, the first direction, and the axial direction of the mounting hole 1110 are perpendicular. The second direction is also the radial direction of the mounting hole 1110. By setting the limiting cap 120, the fork lug 1000 is limited along the second direction, reducing the possibility of displacement of the fork lug 1000 during extrusion strengthening and ensuring the extrusion strengthening effect.

[0053] See Figure 1 and Figure 5As shown, in one embodiment, one of the limiting cover 120 and the fork-ear hole lug 1000 is provided with a limiting groove 121, and the other is engaged with the limiting groove 121. For example, in the embodiment shown in the figure, the limiting cover 120 includes a limiting portion, which is configured with the limiting groove 121. A portion of the fork-ear hole lug 1000 protrudes relative to the tooling base 110 and is engaged with the limiting groove 121. In this way, the limiting cover 120 can restrict the displacement of the fork-ear hole lug 1000 in the first direction and the second direction, reducing the possibility of displacement of the fork-ear hole lug 1000 during the extrusion strengthening process and ensuring the extrusion strengthening effect. In some embodiments, the size of the limiting groove 121 is adapted to the size of the fork-ear hole lug 1000 protruding from the tooling base 110. In some embodiments, the difference between the size of the accommodating space enclosed by the limiting cover 120 and the tooling base 110 along the second direction and the size of the fork-ear hole lug 1000 along the second direction is less than 0.05 mm. This further limits the position of the fork-shaped lug 1000, reducing the possibility of axial and radial displacement of the fork-shaped lug 1000.

[0054] like Figure 1 and Figure 5 As shown, in some embodiments, the limiting cover 120 has a connecting portion 122 for connecting to the tooling base 110. For example, in the embodiment shown in the figures, two connecting portions 122 are provided and are disposed on both sides of the limiting portion along a first direction, making the limiting cover 120 approximately U-shaped. In some embodiments, the connecting portion 122 is provided with a threaded hole, so that the limiting cover 120 and the tooling base 110 can be connected by fasteners such as screws passing through the connecting portion 122 and the tooling base 110.

[0055] See Figure 4 As shown, in one embodiment, the extrusion bar 200 includes an extrusion section 220 and guide sections 230 distributed at both axial ends of the extrusion section 220. The cross-sectional area of ​​the guide sections 230 gradually increases from the direction of the guide sections 230 towards the extrusion section 220. This design allows the guide sections 230 to provide installation guidance for the extrusion bar 200, making it easier to fit the extrusion bar 200 into the mounting hole 1110 of the fork lug 1000. Understandably, when the extrusion bar 200 is subjected to external force and moves axially along the mounting hole 1110, the mounting hole 1110 is sequentially extruded by one guide section 230, the extrusion section 220, and the other guide section 230, resulting in a uniform residual stress field forming on the hole wall of the mounting hole 1110, thereby extending the fatigue life of the fork lug 1000.

[0056] See Figure 4As shown, in one embodiment, a transition fillet 240 is provided between the extrusion section 220 and the guide section 230. The transition fillet 240 provides a smooth transition path between the extrusion section 220 and the guide section 230, avoiding stress concentration caused by abrupt changes in geometry and preventing fatigue cracks from initiating in the wall of the assembly hole 1110. In some embodiments, the end of the guide section 230 facing away from the extrusion section 220 is also provided with a transition fillet 240, further reducing the possibility of stress concentration when the extrusion rod 200 contacts the wall of the assembly hole 1110 through the guide section 230.

[0057] See Figure 2 and Figure 4 As shown, in one embodiment, the axial length of the extrusion section 220 is greater than the axial depth of the assembly hole 1110, so that the hole wall of the assembly hole 1110 can be in complete contact with the extrusion section 220 of the extrusion rod 200 for a period of time, ultimately achieving a good strengthening effect and introducing a uniform residual stress field. For example, in one embodiment, the axial depth of the assembly hole 1110 is 10 mm, and correspondingly, the axial length of the extrusion section 220 should be greater than 10 mm.

[0058] In some embodiments, the extrusion bar 200 may be made of a high-hardness material such as high-speed tool steel, for example, tungsten-based high-speed steel (W18Cr4V), which has high hardness, red hardness, and high-temperature hardness. In some embodiments, the force-applying component 400 and the transmission component 300 may also be made of high-speed tool steel.

[0059] During assembly, the extrusion rod 200 is connected to the transmission component 300, for example, by a threaded connection. The transmission component 300 is connected to the transmission mating hole 113 on the tooling base 110; the fork lug 1000 is placed in the tooling base 110, such that the mounting hole 1110 of the fork lug 1000 is coaxial with the transmission mating hole 113 of the tooling base 110. Next, the extrusion rod 200 passes through the extrusion through hole 111 of the tooling base, such that the guide section 230 of the extrusion rod 200 fits against the mounting hole 1110 of the fork lug 1000, and the end faces of the two transmission components 300 abut against each other. The force-applying component 400 passes through the force-applying mating hole 112 on the tooling base 110, such that the first inclined surface 410 fits against the second inclined surface 310. The force-applying device applies a force to the force-applying component 400 in the first direction, and the force is converted into an axial moving force by the transmission component 300, so that the two extrusion rods 200 move axially in opposite directions, thereby completing the symmetrical extrusion of the two assembly holes 1110 of the fork ear plate 1000.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A device for extruding and strengthening ear plates with forked ear holes, characterized in that, The fork-shaped lug (1000) has two protrusions (1100), each of which is provided with a mounting hole (1110); the fork-shaped lug extrusion strengthening device includes: Fixing base (100), the fixing base (100) is used to fix the fork ear hole ear piece (1000); Two extrusion bars (200) are located between two mounting holes (1110) of the fork lug plate (1000) and are arranged coaxially with the mounting holes (1110); Two transmission components (300) are connected to two extrusion bars (200) in a one-to-one correspondence and are located between the two extrusion bars (200); A force-applying member (400) is configured to be operablely movable in a first direction to drive the two transmission members (300) to move away from each other along the axial direction of the mounting hole (1110) so that the extrusion bar (200) extrudes and passes through the mounting hole (1110) on the corresponding side.

2. The fork-shaped ear plate extrusion strengthening device according to claim 1, characterized in that, The force-applying component (400) is constructed with a first inclined surface (410), and the transmission component (300) is constructed with a second inclined surface (310); the second inclined surfaces (310) of the two transmission components (300) are symmetrically distributed; When the force-applying component (400) moves along the first direction, the two transmission components (300) are driven to move in opposite directions through the sliding engagement between the first inclined surface (410) and the second inclined surface (310).

3. The fork-shaped ear plate extrusion strengthening device according to claim 1, characterized in that, One of the transmission member (300) and the extrusion bar (200) is provided with a connecting hole (210), and the other is provided with a connecting block (320) connected to the connecting hole (210).

4. The fork-shaped ear hole extrusion strengthening device according to claim 3, characterized in that, The extrusion bar (200) is provided with the connecting hole (210), which is coaxial with the assembly hole (1110).

5. The fork-shaped ear plate extrusion strengthening device according to claim 4, characterized in that, The fixed base (100) is provided with a transmission mating hole (113), at least a portion of the transmission member (300) is located in the transmission mating hole (113); the transmission mating hole (113) is coaxial with the connecting hole (210).

6. The fork-shaped ear hole extrusion strengthening device according to claim 1, characterized in that, The fixing base (100) includes a tooling base (110) which has two first receiving holes (114) for receiving the two protrusions (1100) of the fork ear hole (1000).

7. The fork-shaped ear plate extrusion strengthening device according to claim 6, characterized in that, The fixed base (100) also includes a limiting cover (120) detachably connected to the tooling base (110), the limiting cover (120) and the tooling base (110) being arranged along the second direction and abutting against the fork ear hole ear piece (1000).

8. The fork-shaped ear plate extrusion strengthening device according to claim 7, characterized in that, One of the limiting cover (120) and the fork-shaped ear plate (1000) is provided with a limiting groove (121), and the other is engaged with the limiting groove (121).

9. The fork-shaped ear plate extrusion strengthening device according to claim 1, characterized in that, The extrusion bar (200) includes an extrusion section (220) and guide sections (230) distributed at both ends of the axial direction of the extrusion section (220). The cross-sectional area of ​​the guide section (230) gradually increases from the direction of the guide section (230) to the extrusion section (220).

10. The fork-shaped ear plate extrusion strengthening device according to claim 9, characterized in that, A transition fillet (240) is provided between the extrusion section (220) and the guide section (230). And / or, the guide section (230) is provided with a transition fillet (240) at the end opposite to the extrusion section (220); And / or, the axial length of the extrusion section (220) is greater than the axial hole depth of the assembly hole (1110).

Images