Clamping mechanism and method for machining aircraft engine thrust reverser

Abstract

The invention relates to the technical field of aero-engine thrust reverser machining, and discloses a clamping mechanism for aero-engine thrust reverser machining, which comprises a vertical supporting mechanism, a universal supporting mechanism and a fixing mechanism. The bottom face of the thrust reverser is supported by the vertical supporting mechanism, the irregular arc face of the thrust reverser is supported by the universal supporting mechanism, and the fixing mechanism abuts against the two sides of the thrust reverser. The clamping mechanism solves the technical problems that a thrust reverser with multiple cavities and an irregular arc structure is unstable in clamping and insufficient in rigidity, and stress is generated during pressing, and the problem that a thrust reverser with a special-shaped structure is unstable in irregular arc surface supporting, is novel in structure, can reduce the deformation amount of the thrust reverser in the clamping process, and improves the product percent of pass and the machining efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of the machining of the thrust reverser of an aero-engine, and discloses a clamping mechanism and method for machining the thrust reverser of an aero-engine. Background Art

[0002] A certain type of thrust reverser of an aero-engine is a special-shaped structural part, which is characterized by multiple cavities, thin walls. Except for the milled plane, the bottom is a rib plate and an irregular arc structure, and there is no flat surface for clamping. The structural rigidity is poor, the milling deformation is large, and it is difficult to ensure the straightness of the groove of 0.1 mm and the dimensions of the thin-walled triangular cavity, etc. How to ensure a stable clamping method for machining and reduce the clamping stress is the key to ensuring the dimensions and is also a technical bottleneck that the industry urgently needs to break through. Summary of the Invention

[0003] The purpose of the present invention is to provide a clamping mechanism for machining the thrust reverser of an aero-engine, which solves the technical problems of unstable clamping, insufficient rigidity, and stress generated during pressing of the thrust reverser with multiple cavities and irregular arc structures, as well as the problem of unstable support of the irregular arc surface of the special-shaped thrust reverser; and can reduce the deformation amount during the clamping process of the thrust reverser, improve the product qualification rate and processing efficiency.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0005] A clamping mechanism for machining the thrust reverser of an aero-engine, comprising:

[0006] A vertical support mechanism, which is vertically installed on the base and is used to support the bottom position of the thrust reverser of the aero-engine;

[0007] A universal support mechanism, the universal support mechanism includes a guide seat, the guide seat is arranged at the position of the base corresponding to the irregular arc surface of the thrust reverser, the guide base is provided with a mounting hole in the vertical direction, a push rod is inserted into the mounting hole, and the top end of the push rod extends out of the mounting hole; a guide groove is arranged on the inner wall surface of the mounting hole, and a limit pin is arranged on the outer wall of the push rod and extends into the guide groove; the top of the guide seat is movably installed with an annular adjustable nut through a limit block, and a thread matched with the annular adjustable nut is arranged on the outer wall of the push rod;

[0008] A universal support block, the universal support block is movably installed at the top of the push rod through a hinge ball head, and the universal support block is used to abut against the irregular arc surface of the thrust reverser;

[0009] Fixing mechanism, the number of the fixing mechanisms is multiple groups, each group of fixing mechanisms includes two lateral tightening mechanisms, the thrust reverser is located between the two lateral tightening mechanisms of each group of fixing mechanisms, and the two lateral tightening mechanisms are used to abut against both sides of the thrust reverser.

[0010] Further, an end face positioning block is further arranged on the base, and the end face positioning block is used to abut against one end face of the thrust reverser; a pressing mechanism is further included, and the pressing mechanism is used to cooperate with the end face positioning block to fix the thrust reverser on the clamping mechanism in a lateral pressing manner;

[0011] Further, the pressing mechanism includes a first support, a hexagon nut, a stud, a pressing plate and an adjusting support, and the pressing plate is used to abut against the axial end face of the thrust reverser; after adjusting the adjusting support to a proper position, the hexagon nut is tightened to press the thrust reverser.

[0012] Further, a T-shaped groove is arranged on the base at a position corresponding to the first support, the bottom of the first support is installed in the T-shaped groove, and a locking mechanism matched with the T-shaped groove is arranged at the bottom of the first support, and the locking mechanism is used to fix the first support after adjusting the relative position between the first support and the T-shaped groove.

[0013] Further, the end face positioning block is of an L-shaped structure, one end face of the vertical support plate of the end face positioning block is used to abut against one end face of the thrust reverser, a U-shaped groove is arranged on the horizontal support plate of the end face positioning block, and a tightening bolt capable of limiting and fixing the horizontal support plate is arranged on the base at a position corresponding to the U-shaped groove.

[0014] Further, two guiding blocks are further arranged on the base, and the two guiding blocks are respectively located on both sides of the horizontal support plate and are used to contact and cooperate with both side edges of the horizontal support plate.

[0015] Further, each lateral tightening mechanism includes a second support installed on the base, a threaded hole is formed in the second support, an adjusting screw rod is arranged in the threaded hole in a matching manner, and a pressing head is arranged on the end face of the adjusting screw rod in cooperation with the thrust reverser.

[0016] Further, a cushion block is arranged at the contact position between the pressing head and the thrust reverser.

[0017] Further, the vertical support mechanism includes a threaded rod and an adjusting rod, the threaded rod is vertically fixed on the base, a threaded hole matched with the threaded rod is arranged at the bottom of the adjusting rod, and the top of the adjusting rod is used to contact the bottom of the outer wall of the thrust reverser.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses a vertical support mechanism to support the bottom surface of the thrust reverser, a universal support mechanism to support the irregular arc surface of the thrust reverser, and a fixing mechanism to abut against both sides of the thrust reverser. It solves the technical problems of unstable clamping, insufficient rigidity, and stress generated during pressing of the thrust reverser with multi-cavity and irregular arc structures, as well as the problem of unstable support of the irregular arc surface of the thrust reverser with a special-shaped structure. This clamping mechanism is novel in structure, can reduce the deformation amount during the clamping process of the thrust reverser, and improve the product qualification rate and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic structural diagram of a clamping mechanism for machining an aircraft engine thrust reverser in an embodiment;

[0020] Figure 2 FIG. is a side view of the clamping mechanism in the embodiment;

[0021] Figure 3 FIG. is a top view of the clamping mechanism in the embodiment;

[0022] Figure 4 FIG. is a schematic structural diagram of the universal support mechanism in the embodiment;

[0023] Among them, 1, vertical support mechanism; 101, threaded rod; 102, adjusting rod; 2, base; 201, T-shaped groove; 202, locking mechanism; 3, universal support mechanism; 301, guide seat; 302, mounting hole; 303, ejector rod; 304, guide groove; 305, limit pin; 306, limit block; 307, annular adjustable nut; 4, universal support block; 5, articulated ball head; 6, transverse tightening mechanism; 601, second support; 602, adjusting screw; 603, pressure head; 7, pressing mechanism; 701, first support; 702, hexagonal nut; 703, stud; 704, pressing plate; 705, adjusting support; 8, end face positioning block; 801, vertical support plate; 802, horizontal support plate; 803, U-shaped groove; 804, tightening bolt; 9, guide block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described in detail below in conjunction with the embodiments and the drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments. Any technology implemented based on the content of the present invention belongs to the scope of the present invention.

[0025] Embodiment

[0026] Refer to Figures 1 - 4 , a clamping mechanism for machining an aircraft engine thrust reverser, comprising:

[0027] Vertical support mechanism 1, which is vertically installed on the base 2 and used to support the bottom position of the aero-engine thrust reverser device;

[0028] Universal support mechanism 3, which includes a guide seat 301. The guide seat 301 is arranged at the position of the base 2 corresponding to the irregular arc surface of the thrust reverser device. The guide base 2 is provided with an installation hole 302 in the vertical direction. A push rod 303 is inserted into the installation hole 302, and the top end of the push rod 303 extends out of the installation hole 302; a guide groove 304 is arranged on the inner wall surface of the installation hole 302, and a limit pin 305 extending into the guide groove 304 is arranged on the outer wall of the push rod 303; the top of the guide seat 301 is movably installed with an annular adjustable nut 307 through a limit block 306, and a thread cooperating with the annular adjustable nut 307 is arranged on the outer wall of the push rod 303;

[0029] Universal support block 4, which is movably installed on the top of the push rod 303 through a hinge ball head 5, and the universal support block 4 is used to abut against the irregular arc surface of the thrust reverser device;

[0030] Fixing mechanism, the number of the fixing mechanisms is multiple groups. Each group of fixing mechanisms includes two transverse tightening mechanisms 6. The thrust reverser device is located between the two transverse tightening mechanisms 6 of each group of fixing mechanisms, and the two transverse tightening mechanisms 6 are used to abut against the two side positions of the thrust reverser device.

[0031] In this embodiment, the vertical support mechanism 1 is used to support the bottom surface of the thrust reverser device, the universal support mechanism 3 is used to support the irregular arc surface of the thrust reverser device, and the fixing mechanism abuts against the two side positions of the thrust reverser device. It solves the technical problems of unstable clamping, insufficient rigidity, and stress generated during pressing of the thrust reverser device with multi-cavity and irregular arc structures, as well as the problem of unstable support for the irregular arc surface of the thrust reverser device with special-shaped structures. The clamping mechanism is novel in structure, can reduce the deformation amount during the clamping process of the thrust reverser device, and improve the product qualification rate and processing efficiency.

[0032] In this embodiment, each of the transverse tightening mechanisms 6 of the fixing mechanism includes a second support 601 installed on the base 2. A threaded hole is provided on the second support 601, and an adjusting screw 602 is cooperatively arranged in the threaded hole. A pressing head 603 is arranged on the end surface of the adjusting screw 602 that cooperates with the thrust reverser device. The pressing head 603 is used to closely contact the side position of the thrust reverser device. By rotating the adjusting screw 602, the pressure applied by the pressing head 603 to the thrust reverser device can be conveniently adjusted to ensure that the clamping mechanism can stably fix the thrust reverser device and prevent it from moving during the processing. A cushion block is arranged at the contact position between the pressing head 603 and the thrust reverser device to ensure that the contact surface between the pressing head 603 and the thrust reverser device can evenly distribute the pressure and avoid local damage to the thrust reverser device.

[0033] In this embodiment, the vertical support mechanism 1 includes a threaded rod 101 and an adjusting rod 102. The threaded rod 101 is vertically fixed on the base 2. The bottom of the adjusting rod 102 is provided with a threaded hole that cooperates with the threaded rod 101. The top of the adjusting rod 102 is used to contact the bottom of the outer wall of the thrust reverser. The design of the threaded rod 101 enables the adjusting rod 102 to flexibly adjust its height in the vertical direction to adapt to thrust reversers of different sizes. During actual operation, the height of the adjusting rod 102 can be adjusted by rotating it according to the specific size of the thrust reverser to ensure that the thrust reverser is stably and firmly supported in the clamping mechanism. In this embodiment, the top of the adjusting rod 102 can also be set as a plane that contacts the bottom of the outer wall of the thrust reverser, which can not only increase the contact area, improve the clamping stability, but also protect the outer wall of the thrust reverser from damage by dispersing the pressure.

[0034] In this embodiment, an end face positioning block 8 is further provided on the base 2. The end face positioning block 8 is used to abut against one end face of the thrust reverser, and the end face positioning block 8 is used to completely fit with the part reference plane to realize the reference plane positioning and fixing of the thrust reverser.

[0035] In this embodiment, the end face positioning block 8 has an L-shaped structure. One end face of the vertical support plate 801 of the end face positioning block 8 is used to abut against one end face of the thrust reverser. A U-shaped groove 803 is provided on the horizontal support plate 802 of the end face positioning block 8. A tightening bolt 804 for limiting and fixing the horizontal support plate 802 is provided on the base 2 at a position corresponding to the U-shaped groove 803. The design of the U-shaped groove 803 can realize the adjustment of the horizontal distance of the end face positioning block 8, ensure the complete fit of the end face positioning block 8 with the part reference plane, and realize the rapid positioning of the reference plane of the thrust reverser.

[0036] In this embodiment, it further includes a pressing mechanism 7. The pressing mechanism is used to cooperate with the end face positioning block and fix the thrust device on the clamping mechanism by means of lateral pressing. When an ordinary mechanism presses a part, it uses a top-down pressing method, and the force direction of the part is the vertical direction. This pressing mechanism uses a lateral pressing method (pressing method from right to left), the force direction of the part is the horizontal direction, and the pressing position is far from the machining surface. This lateral pressing method greatly reduces the deformation of the part. The pressing mechanism 7 includes a first support 701, a hexagon nut 702, a stud 703, a pressing plate 704, and an adjusting support 705, which is used to adjust the adjusting support 705 to a suitable position during pressing and tighten the hexagon nut 702 to press the thrust device. A T-slot 201 is provided at the position corresponding to the first support 701 on the base 2. The bottom of the first support 701 is installed in the T-slot 201. A locking mechanism 202 matching the T-slot 201 is provided at the bottom of the first support 701. The locking mechanism 202 is used to fix the first support 701 after adjusting the relative position between the first support 701 and the T-slot 201. The first support 701, as the main support component of the pressing mechanism 7, is connected to the base 2 through the T-slot 201 installed at its bottom, realizing the sliding adjustment of the first support 701 on the base 2. This design allows the operator to adjust the position of the first support 701 according to the actual size of the thrust device, so as to ensure that the pressing mechanism 7 can accurately act on the thrust device, enabling the clamping mechanism to more flexibly adapt to thrust devices of different sizes and shapes when pressing the thrust device. The design of the locking mechanism 202 also fully considers stability and safety. After the position of the first support 701 is adjusted, the locking mechanism 202 can firmly fix the first support 701 in the T-slot 201 to prevent it from shifting or loosening during the machining process, which not only ensures the stability and reliability of the pressing mechanism 7, but also further improves the machining accuracy and safety of the entire clamping mechanism.

[0037] During the pressing operation, the combination of the hexagon nut 702 and the stud 703 provides the clamping force required by the pressing mechanism 7. By rotating the hexagon nut 702, the stud 703 and the pressing plate 704 can be pushed to move until the pressing plate 704 closely fits on the thrust device, further improving the stability and reliability of the clamping mechanism.

[0038] In this embodiment, two guiding blocks 9 are further provided on the base 2. The two guiding blocks 9 are respectively located on both sides of the transverse support plate 802 and are used to contact and cooperate with the two side edges of the transverse support plate 802 to realize guiding and limiting of the transverse support plate 802, ensuring that the end face positioning block 8 will not shift when adjusting the position, making the adjustment more convenient and improving work efficiency.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A clamping mechanism for the machining of an aircraft engine thrust reverser, characterized in that Comprising: A vertical support mechanism which is vertically installed on the base and is used to support the bottom position of the thrust reverser of the aero-engine; A universal support mechanism which includes a guide seat. The guide seat is arranged at the position of the base corresponding to the irregular arc surface of the thrust reverser. The guide base is provided with a mounting hole in the vertical direction. A push rod is inserted into the mounting hole, and the top end of the push rod extends out of the mounting hole. A guide groove is arranged on the inner wall surface of the mounting hole, and a limit pin is arranged on the outer wall of the push rod and extends into the guide groove. The top of the guide seat is movably installed with an annular adjustable nut through a limit block, and a thread matching with the annular adjustable nut is arranged on the outer wall of the push rod; A universal support block which is movably installed on the top of the push rod through a hinge ball head and is used to abut against the irregular arc surface of the thrust reverser; A fixing mechanism. The number of the fixing mechanisms is multiple groups. Each group of fixing mechanisms includes two transverse tightening mechanisms. The thrust reverser is located between the two transverse tightening mechanisms of each group of fixing mechanisms, and the two transverse tightening mechanisms are used to abut against the two side positions of the thrust reverser.

2. The clamping mechanism for the machining of the thrust reverser of an aeroengine according to claim 1, characterized in that An end face positioning block is further arranged on the base and is used to abut against one end face of the thrust reverser; and a pressing mechanism is further included. The pressing mechanism is used to cooperate with the end face positioning block and fix the thrust reverser on the clamping mechanism by means of transverse pressing.

3. The clamping mechanism for the machining of the thrust reverser of an aeroengine according to claim 2, characterized in that, The pressing mechanism includes a first support, a hexagonal nut, a stud, a pressing plate and an adjusting support. The pressing plate is used to abut against the axial end face of the thrust reverser; after adjusting the adjusting support to a proper position, the hexagonal nut is tightened to press the thrust reverser.

4. The clamping mechanism for machining the thrust reverser of an aeroengine according to claim 3, characterized in that, A T-shaped groove is arranged on the base at the position corresponding to the first support. The bottom of the first support is installed in the T-shaped groove, and a locking mechanism matching with the T-shaped groove is arranged at the bottom of the first support. The locking mechanism is used to fix the first support after adjusting the relative position between the first support and the T-shaped groove.

5. The clamping mechanism for machining the thrust reverser of an aeroengine according to claim 2, wherein The end face positioning block is of an L-shaped structure. One end face of the vertical support plate of the end face positioning block is used to abut against one end face of the thrust reverser. A U-shaped groove is arranged on the transverse support plate of the end face positioning block, and a tightening bolt capable of limiting and fixing the transverse support plate is arranged on the base at the position corresponding to the U-shaped groove.

6. The clamping mechanism for machining the thrust reverser of an aeroengine according to claim 5, characterized in that, Two guide blocks are further arranged on the base and are respectively located at the two side positions of the transverse support plate and are used to contact and cooperate with the two side edges of the transverse support plate.

7. The clamping mechanism for machining the thrust reverser of an aeroengine according to claim 1, wherein Each transverse tightening mechanism includes a second support installed on the base. A threaded hole is formed in the second support, and an adjusting screw rod is arranged in the threaded hole in a matching manner. A pressing head is arranged on the end face of the adjusting screw rod which cooperates with the thrust reverser.

8. The clamping mechanism for the machining of the thrust reverser of an aeroengine according to claim 7, characterized in that, A cushion block is arranged at the contact position between the pressing head and the thrust reverser.

9. The clamping mechanism for machining the thrust reverser of an aeroengine according to claim 1, characterized in that, The vertical support mechanism includes a threaded rod and an adjusting rod. The threaded rod is vertically fixed on the base. A threaded hole matching with the threaded rod is arranged at the bottom of the adjusting rod, and the top of the adjusting rod is used to contact the outer wall bottom of the thrust reverser.

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