Fixing and supporting tool for square arm part of torque arm

Abstract

The utility model provides a fixing and supporting tool for a torque arm square arm part. The fixing and supporting tool comprises a lower clamping block 1, an upper clamping block 2, a screw 3 and a T-shaped groove block 4, and the upper end face of the lower clamping block 1 is provided with a lower clamping block fillet boss 11, a lower clamping block slope boss 12, a lower clamping block through hole 13, a lower clamping block base 14 and a lower clamping block slope boss 15; the lower clamping block boss 11 is in clearance fit with a lower lightening groove of the torque arm square arm part, and the lower clamping block slope 12 and the lower clamping block slope boss 15 are attached to the lower slope face of the torque arm square arm part. An upper clamping block fillet boss 21, an upper clamping block slope boss 22, an upper clamping block slope boss 23, an upper clamping block counterbore 24 and an upper clamping block base 25 are arranged on the upper end face of the upper clamping block 2; the upper clamping block boss 21 is in clearance fit with an upper lightening groove of the torque arm square arm part, and the upper clamping block slope boss 22 and the upper clamping block slope boss 23 are attached to the lower slope face of the torque arm square arm part.

Description

Technical Field

[0001] This application relates to the field of machining, specifically to a fixed support fixture for a torsion arm square arm part. Background Technology

[0002] The square arm component of the torsion arm on the CFXXX aircraft connects the triangular arm and the retaining ring, and is a critical component for flight safety. This component is a square, thin-walled, symmetrical structure with relief grooves on the top and bottom. It requires high design precision and is made of aluminum alloy. Due to the sloping sides and inconsistent widths at both ends, it is difficult to clamp and fix. Furthermore, the low elastic modulus of the material and the component's inherent structure cause deformation during machining due to weak rigidity. To address this issue, a special tooling was designed to improve machinability and clamping rigidity.

[0003] The technical challenges faced are:

[0004] 1. How to ensure the clamping rigidity of the torsion arm square arm part to meet the rigidity requirements during the finishing of the shape and the machining of precision holes;

[0005] 2. How to ensure the clamping accuracy of the square arm part of the torque arm, so that the surface formed by the axes of the holes at both ends is horizontal after clamping;

[0006] 3. How to ensure that the cutting tool does not interfere with or collide with the device when machining the torsion arm square arm part. Summary of the Invention

[0007] This application provides a fixed support fixture for a torsion arm square arm part, which can solve the problem of deformation during weak rigid clamping.

[0008] Technical solution: This application provides a fixing support fixture for a square arm part of a torque arm, the fixing support fixture including a lower clamping block 1, an upper clamping block 2, a screw 3, and a T-slot block 4, wherein:

[0009] The upper end face of the lower clamping block 1 is provided with a lower clamping block rounded corner boss 11, a lower clamping block ramp boss 12, a lower clamping block through hole 13, a lower clamping block base 14, and a lower clamping block ramp boss 15; the lower clamping block boss 11 is clearance-fitted with the lower light reduction groove of the torque arm square arm part, and the lower clamping block ramp 12 and the lower clamping block ramp boss 15 are in contact with the lower ramp surface of the torque arm square arm part;

[0010] The upper end face of the upper clamping block 2 is provided with an upper clamping block rounded corner boss 21, an upper clamping block ramp boss 22, an upper clamping block ramp boss 23, an upper clamping block countersunk hole 24, and an upper clamping block base 25; the upper clamping block boss 21 is clearance-fitted with the upper lightening groove of the torque arm square arm part, and the upper clamping block ramp boss 22 and the upper clamping block ramp boss 23 are in contact with the lower ramp surface of the torque arm square arm part;

[0011] The two lower clamping block through holes 12 at the left and right ends of the lower clamping block 1 are connected to the two upper clamping block through holes 22 at the left and right ends of the upper clamping block 2 by means of screws 3.

[0012] Two T-slot blocks 4 are provided on the lower end face of the lower clamping block 1 for connection and engagement between the T-slot on the worktable and the screw 3.

[0013] The upper part of the through hole 24 of the upper clamping block 2 is designed as a countersunk hole. The countersunk hole is used to insert the screw, so that the screw is lower than the base of the upper clamping block 2, thus avoiding interference between the tool and the screw during processing.

[0014] The lower clamping block ramp boss 12, lower clamping block ramp boss 15, upper clamping block ramp boss 22, and upper clamping block ramp boss 23 are designed to increase the contact area between the parts and the tooling, facilitate the use of feeler gauges to check for gaps during contact, and improve clamping accuracy and rigidity.

[0015] Specifically, the length and width of the rounded corner boss 11 of the lower clamping block 1 and the rounded corner boss 21 of the upper clamping block 2 are both 0.03mm smaller than the light-reducing groove, and the rounded corner of the boss is slightly larger than the bottom R-angle of the light-reducing groove by 0.1mm. This is to ensure that the boss and the bottom of the light-reducing groove fit tightly and fully, and to reduce the formation of extrusion steps at the R-angle.

[0016] Specifically, the width of the lower clamping block base 14 is consistent with the width of the part fork, ensuring the stability of the clamping and avoiding interference between the tooling and the cutting tool during boring.

[0017] Specifically, the width of the upper clamping block base 25 of the upper clamping block 2 is consistent with the width of the rounded corner boss, so as to avoid interference between the chamfer of the waist of the machined part and the cutting tool.

[0018] Specifically, the diameters of the lower clamping block through hole 13 and the upper clamping block countersunk hole 24 are 1mm larger than the screw diameter in order to smoothly insert the screw 3.

[0019] Specifically, the lower clamping block 1 and the upper clamping block 2 are made of aluminum.

[0020] The beneficial effects of this invention are as follows: Compared with the prior art, the tooling structure of this technical solution is simple and practical, and it can quickly position, clamp and fix. The positioning reference is uniformly fixed, which can not only ensure the accuracy requirements of the fork ear correlation hole coaxiality and ear symmetry accuracy of the torsion arm square arm part, but also the force in the cutting direction is not large and uniform. After processing, the torsion arm square arm part is not deformed, which meets the processing production and assembly requirements. Attached Figure Description

[0021] Figure 1 A schematic diagram of a fixing support fixture for a square arm part of a torque arm provided in this application;

[0022] Figure 2a This is an isometric drawing of the square arm component of the torque arm;

[0023] Figure 2b This is the front view of the square arm part of the torque arm;

[0024] Figure 3 A schematic diagram of a fixing support fixture for a square arm part of a torque arm provided in this application;

[0025] Figure 4a An isometric view of a lower clamping block 1 provided in this application;

[0026] Figure 4b A front view of a lower clamping block 1 provided in this application;

[0027] Figure 5a An isometric view of an upper clamping block 2 provided in this application;

[0028] Figure 5b A front view of an upper clamping block 2 provided in this application;

[0029] Figure 6 A schematic diagram of a screw 3 provided in this application;

[0030] Figure 7 A schematic diagram of a T-shaped slot block 4 provided in this application;

[0031] Wherein: 1 is the lower clamping block, 11 is the rounded corner boss of the lower clamping block, 12 is the sloping boss of the lower clamping block, 13 is the through hole of the lower clamping block, 14 is the sloping side of the lower clamping block, and 15 is the sloping boss of the lower clamping block; 2 is the upper clamping block, 21 is the boss of the upper clamping block, 22 is the sloping boss of the upper clamping block, 23 is the sloping boss of the upper clamping block, 24 is the countersunk hole of the upper clamping block, and 25 is the base of the upper clamping block; 3 is the screw; and 4 is the T-slot block. Detailed Implementation

[0032] This invention relates to a tooling designed to provide fixed support during CNC precision machining of square arm parts with torque arms, and to a device used for machining thin-walled fork-shaped parts with relief grooves and sloping surfaces on both sides and inconsistent widths at both ends.

[0033] like Figure 1-7 As shown, this application provides a fixing support fixture for a specific type of torsion arm square arm part, including a lower clamping block 1, an upper clamping block 2, a screw 3, and a T-slot block 4, wherein:

[0034] The upper end face of the lower clamping block 1 is provided with a lower clamping block rounded corner boss 11, a lower clamping block ramp boss 12, a lower clamping block through hole 13, a lower clamping block base 14, and a lower clamping block ramp boss 15; the lower clamping block boss 11 is clearance-fitted with the lower light reduction groove of the torque arm square arm part, and the lower clamping block ramp 12 and the lower clamping block ramp boss 15 are in contact with the lower ramp surface of the torque arm square arm part;

[0035] The upper end face of the upper clamping block 2 is provided with an upper clamping block rounded corner boss 21, an upper clamping block ramp boss 22, an upper clamping block ramp boss 23, an upper clamping block countersunk hole 24, and an upper clamping block base 25; the upper clamping block boss 21 is clearance-fitted with the upper lightening groove of the torque arm square arm part, and the upper clamping block ramp boss 22 and the upper clamping block ramp boss 23 are in contact with the lower ramp surface of the torque arm square arm part;

[0036] The two lower clamping block through holes 12 at the left and right ends of the lower clamping block 1 are connected to the two upper clamping block through holes 22 at the left and right ends of the upper clamping block 2 by means of screws 3.

[0037] Two T-slot blocks 4 are provided on the lower end face of the lower clamping block 1 for connection and engagement between the T-slot on the worktable and the screw 3.

[0038] The upper part of the through hole 24 of the upper clamping block 2 is designed as a countersunk hole. The countersunk hole is used to insert the screw, so that the screw is lower than the base of the upper clamping block 2, thus avoiding interference between the tool and the screw during processing.

[0039] The lower clamping block ramp boss 12, lower clamping block ramp boss 15, upper clamping block ramp boss 22, and upper clamping block ramp boss 23 are designed to increase the contact area between the parts and the tooling, facilitate the use of feeler gauges to check for gaps during contact, and improve clamping accuracy and rigidity.

[0040] Furthermore, the length and width of the rounded corner boss 11 of the lower clamping block 1 and the rounded corner boss 21 of the upper clamping block 2 are both 0.03mm smaller than the light-reducing groove, and the rounded corner of the boss is slightly larger than the bottom R-angle of the light-reducing groove by 0.1mm, so as to ensure that the boss and the bottom of the light-reducing groove fit tightly and fully, and reduce the formation of extrusion steps at the R-angle.

[0041] Furthermore, the width of the lower clamping block base 14 is consistent with the width of the part fork, ensuring the stability of the clamping and avoiding interference between the tooling and the cutting tool during boring.

[0042] Furthermore, the width of the upper clamping block base 25 of the upper clamping block 2 is consistent with the width of the rounded corner boss, so as to avoid interference between the chamfer of the waist of the machined part and the cutting tool.

[0043] Furthermore, the diameters of the lower clamping block through hole 13 and the upper clamping block countersunk hole 24 are 1 mm larger than the screw diameter in order to smoothly pass the screw 3 through.

[0044] Furthermore, the lower clamping block 1 and the upper clamping block 2 are made of aluminum, which makes it less likely to cause elastic deformation of the parts under pressure.

[0045] Furthermore, the diameter of the screw 3 and the hole positions of the lower clamping block 1 and the upper clamping block 2 are selected to avoid interference with the tool during boring.

[0046] In summary, this application provides a fixed support fixture for a torsion arm square arm part. The fixture achieves this by having the lower clamping block 1 and upper clamping block 2 engage with the upper and lower light-reducing grooves of the torsion arm square arm part, and by having the lower clamping block ramp boss 12 and upper clamping block ramp boss 22 of the lower and upper clamping blocks 1 and 2 tightly fit with the upper and lower ramp surfaces of the part. Because the dimensions of the lower clamping block rounded corner boss 11 and upper clamping block rounded corner boss 21 are consistent with the basic dimensions of these components, the fixture cannot be displaced laterally or longitudinally, ensuring clamping rigidity. The advantage of using aluminum material is that it ensures the clamping rigidity of the torsion arm square arm part while minimizing the risk of compressive elastic deformation of the part. Furthermore, the material is not easily corroded by cutting fluid, allowing for repeated use and extending its service life.

Claims

1. A fixing support fixture for a square arm part of a torque arm, characterized in that, The fixed support fixture includes a lower clamping block (1), an upper clamping block (2), a screw (3), and a T-slot block (4), wherein: The upper end face of the lower clamping block (1) is provided with a lower clamping block rounded corner boss (11), a lower clamping block ramp (12), a lower clamping block through hole (13), a lower clamping block base (14), and a lower clamping block ramp boss (15); the lower clamping block rounded corner boss (11) is in clearance fit with the lower light reduction groove of the torque arm square arm part, and the lower clamping block ramp (12) and the lower clamping block ramp boss (15) fit against the lower ramp surface of the torque arm square arm part; The upper end face of the upper clamping block (2) is provided with an upper clamping block rounded corner boss (21), an upper clamping block ramp (22), an upper clamping block ramp boss (23), an upper clamping block countersunk hole (24), and an upper clamping block base (25); the upper clamping block rounded corner boss (21) is in clearance fit with the upper lightening groove of the torque arm square arm part, and the upper clamping block ramp (22) and the upper clamping block ramp boss (23) fit against the lower ramp surface of the torque arm square arm part; The two lower clamping block through holes (13) at the left and right ends of the lower clamping block (1) are connected to the two upper clamping block through holes at the left and right ends of the upper clamping block (2) by screws (3); Two T-slot blocks (4) are provided on the lower end face of the lower clamping block (1) for the T-slot on the worktable and the screw (3) to connect and cooperate. The upper part of the through hole of the upper clamping block (2) is designed as a countersunk hole. The countersunk hole is used to insert the screw, so that the screw is lower than the base of the upper clamping block (2) to avoid interference between the tool and the screw during processing. The lower clamping block ramp (12), lower clamping block ramp boss (15), upper clamping block ramp (22), and upper clamping block ramp boss (23) are designed to increase the contact area between the parts and the tooling, facilitate the use of feeler gauges to check for gaps during contact, and improve clamping accuracy and rigidity.

2. The fixed support fixture according to claim 1, characterized in that, The length and width of the rounded corner boss (11) of the lower clamping block (1) and the rounded corner boss (21) of the upper clamping block (2) are both 0.03mm smaller than the light-reducing groove, and the rounded corner of the boss is slightly larger than the bottom R-angle of the light-reducing groove by 0.1mm. This is to ensure that the boss and the bottom of the light-reducing groove fit tightly and fully, and to reduce the formation of extrusion steps at the R-angle.

3. The fixed support fixture according to claim 1, characterized in that, The width of the lower clamping block base (14) is consistent with the width of the part fork, ensuring the stability of the clamping and avoiding interference between the tool and the cutting tool during boring.

4. The fixed support fixture according to claim 1, characterized in that, The width of the upper clamping block base (25) of the upper clamping block (2) is consistent with the width of the rounded corner boss, so as to avoid interference of the chamfer of the waist of the machining part with the tool.

5. The fixed support fixture according to claim 1, characterized in that, The diameters of the lower clamping block through hole (13) and the upper clamping block countersunk hole (24) are 1 mm larger than the screw diameter in order to smoothly pass the screw (3).

6. The fixed support fixture according to claim 1, characterized in that, The lower clamping block (1) and the upper clamping block (2) are made of aluminum.

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