High-precision inclined fine oil passage hole quick machining fixture for support casing

Abstract

This invention discloses a high-precision, oblique, fine oil passage hole rapid machining fixture for a support housing, comprising a support base, a positioning plate, and a reference cylinder. The support base has a horizontal support plate and an oblique support plate. The horizontal support plate is fixed to a machine tool, and the oblique support plate is obliquely fixed to the horizontal support plate. The positioning plate has multiple bolt holes A in its center. The lower part of the reference cylinder is fixed to the positioning plate by bolts, with screws passing through the bolt holes A. The positioning plate is fixedly mounted on the upper surface of the oblique support plate. The positioning plate has a reference ring, the lower end face of which is in contact with the upper surface of the positioning plate. This invention enables rapid positioning of the support housing through the axial, axial, and radial actions of the machining fixture, thereby quickly aligning the oil passage hole. Alignment is not required for each part during machining, reducing wasted time. The number of machining steps is reduced, lowering machining time. Furthermore, this fixture can be used for machining on CNC machine tools or conventional machine tools, improving the utilization rate of machining equipment.

Description

Technical Field

[0001] This invention belongs to the field of aircraft manufacturing, and in particular relates to a high-precision, oblique, fine oil passage hole rapid machining fixture for support casings. Background Technology

[0002] The small end inner surface of the aero-engine support casing has a high-precision oblique fine oil passage hole. The axis of the oil passage hole forms a 45° angle with the axis of the inner hole of the support casing, with an angle tolerance of 15′. The hole is 21mm long and has a diameter of Φ1.2, with a diameter tolerance of 0.05. The distance between the intersection of the hole axis and the inner hole surface of the part and the small end face of the part is 8mm, with a tolerance of 0.06. Figure 1 As shown, due to the small diameter, high precision, and special position and orientation of the oil passage holes, previous processing methods could only be performed using CNC machine tools to ensure quality. This involved countersinking, drilling, and reaming, and each part required clamping and alignment, resulting in low processing efficiency. Each part required a processing time of 5 hours, which was extremely unfavorable for mass production. Therefore, it is necessary to invent a high-precision, oblique, fine oil passage hole rapid machining fixture for the support casing. This fixture can be used with both CNC and conventional machine tools, improving equipment utilization. Furthermore, it eliminates the need for clamping and alignment of each part; only the first part in a batch needs to be clamped and aligned once, and subsequent parts only require clamping and machining, reducing the number of repeated clamping and alignment operations and the associated time. Additionally, this fixture allows for drilling and reaming, reducing machining steps. In summary, this fixture not only improves equipment utilization but also reduces the number of clamping and alignment operations and the associated time, while also reducing machining steps and ensuring processing quality. Each part only requires 1 hour to process, significantly improving efficiency and making it suitable for mass production. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a high-precision oblique fine oil passage hole quick machining fixture for the support casing, which can solve the problems of low machining accuracy and low clamping and alignment efficiency in the prior art.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a high-precision, oblique, fine oil passage hole rapid machining fixture for a support housing, comprising a support base, a positioning plate, and a reference cylinder. The support base is provided with a horizontal support plate and an oblique support plate. The horizontal support plate is fixed on a machine tool, and the oblique support plate is obliquely fixed on the horizontal support plate. The positioning plate has multiple bolt holes A in the middle. The lower part of the reference cylinder is fixed to the positioning plate by bolts, with screws passing through the bolt holes A. The positioning plate is fixedly installed on the upper surface of the oblique support plate. The positioning plate is provided with a reference ring, the lower end surface of which is in contact with the upper surface of the positioning plate, and the reference ring is provided with bolt holes B. The reference ring is connected to the positioning plate by bolts.

[0006] The inclined support plate and the horizontal support plate are fixed together with a positioning surface, and the lower part of the positioning plate is close to the positioning surface.

[0007] The reference ring is provided with a pressure plate on its outer periphery. The pressure plate is fixed to the positioning plate by bolts. When the support housing is installed on the positioning plate, one end of the pressure plate is pressed tightly against the support housing.

[0008] The reference ring is provided with a ring positioning hole, and the axis of the ring positioning hole has an angle of 45° with the center line of the positioning plate 2.

[0009] The upper end face of the reference ring is the reference surface for supporting the part. When the support housing is installed on the positioning plate, the reference surface for supporting the part is in contact with the lower end face of the support housing. The upper end face of the reference ring is provided with an oblique positioning hole, and a positioning pin is provided on the oblique positioning hole. One end of the positioning pin is inserted into the support housing.

[0010] The lower part of the reference cylinder is provided with a drill sleeve positioning hole A, and the positioning plate is provided with a drill sleeve positioning hole B. The drill sleeve positioning hole A and the drill sleeve positioning hole B are connected by a pin.

[0011] The upper part of the reference cylinder has a support surface, which is in contact with the lower end face of the small end of the support casing.

[0012] The upper part of the reference cylinder is provided with a radial positioning surface, which is in close contact with the inner hole of the small end of the support casing.

[0013] The reference cylinder has a drill sleeve on its upper part. The axis of the drill sleeve is coplanar with the center line of the positioning plate, and the center line of the drill sleeve is vertically downward. The drill sleeve is located directly above the drilling position of the support casing.

[0014] The inclined support plate has two weight-reducing grooves in the middle, and the positioning plate has seven weight-reducing holes in the middle.

[0015] The beneficial effects of this invention are as follows: the axial, axial and radial actions of the machining fixture enable the support housing to be quickly positioned, thereby quickly aligning the oil passage holes. During machining, it is not necessary to align each part, reducing the time wasted on alignment. The number of machining steps is reduced, thus reducing the machining time. Moreover, this fixture can be used for machining on CNC machine tools or ordinary machine tools, thereby improving the utilization rate of machining equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the inclined fine oil passage hole of the support casing;

[0017] Figure 2 This is a schematic diagram of the support casing clamping;

[0018] Figure 3 This is a schematic diagram of the fixture's structure;

[0019] Figure 4 This is a structural schematic diagram of the support bracket;

[0020] Figure 5 This is a structural diagram of the positioning plate;

[0021] Figure 6 This is a schematic diagram of the reference cylinder;

[0022] In the diagram: 1-support base, 2-positioning plate, 3-reference cylinder, 4-horizontal support plate, 5-inclined support plate, 6-positioning surface, 8-reference ring, 9-bolt hole B, 10-drill bushing positioning hole B, 11-bolt hole A, 12-clamping bolt hole, 13-pressure plate, 14-ring positioning hole, 15-inclined hole positioning hole, 16-positioning pin, 17-drill bushing positioning hole A, 18-bolt hole B, 19-supporting surface, 20-radial positioning surface, 21-drill bushing. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] like Figures 1 to 6 As shown, a high-precision oblique fine oil passage hole rapid machining fixture for supporting the housing includes a support base 1, a positioning plate 2, and a reference cylinder 3. The support base 1 is provided with a horizontal support plate 4 and an oblique support plate 5. The horizontal support plate 4 is fixed on the machine tool, and the oblique support plate 5 is obliquely fixed on the horizontal support plate 4. The positioning plate 2 is provided with multiple bolt holes A11 in the middle. The lower part of the reference cylinder 3 is fixed to the positioning plate 2 by bolts, and the screws pass through the bolt holes A11. The positioning plate 2 is fixedly installed on the upper end face of the oblique support plate 5. The positioning plate 2 is provided with a reference ring 8. The lower end face of the reference ring 8 is in contact with the upper end face of the positioning plate 2, and the reference ring 8 is provided with bolt holes B9. The reference ring 8 is connected to the positioning plate 2 by bolts.

[0025] When machining the inclined fine oil passage hole on the support housing, the support housing is installed on the machining fixture, with the lower end face of the support housing resting against the upper end face of the reference ring 8. The tilt angle of the support housing is controlled by the inclined support plate 5, and the positioning pin 16 is inserted into the support housing to ensure the circumferential angle of the support housing. At the same time, the lower end face of the small end of the support housing rests against the support surface 19, and the inner hole of the small end of the support housing fits against the radial positioning surface 20. The lower part of the support housing is clamped by the pressure plate 13. After installation, the inclined fine oil passage hole is located directly below the drill sleeve 21. At this time, the drill bit can be inserted from the drill sleeve 21 by a CNC machine tool or a conventional machine tool to complete the positioning of the drill bit and the inclined fine oil passage hole, which can greatly improve the machining efficiency.

[0026] The inclined support plate 5 is fixed to the horizontal support plate 4 at a positioning surface 6. The lower part of the positioning plate 2 is close to the positioning surface 6 to prevent the positioning plate 2 from sliding downward.

[0027] The reference ring 8 is provided with a pressure plate 13 on its outer periphery. The pressure plate 13 is fixed to the positioning plate 2 by bolts. When the support housing is installed on the positioning plate 2, one end of the pressure plate 13 is pressed tightly on the support housing. After the bolts are tightened, the pressure plate 13 can be pressed on the positioning plate 2, thereby fixing the lower part of the support housing, preventing the support housing from shifting during processing, and ensuring processing accuracy.

[0028] The reference ring 8 is provided with a ring positioning hole 14. The axis of the ring positioning hole 14 has an angle of 45° with the center line of the positioning plate 2. This is used to ensure that the angle between the inclined positioning hole 15 on the reference ring 8 and the center line of the positioning plate 2 is 11 degrees, so that after the positioning pin 16 is inserted into the positioning hole on the support housing, the drilling position on the support housing is exactly below the drill sleeve 21.

[0029] The upper end face of the reference ring 8 is the reference surface for supporting the part. When the support housing is installed on the positioning plate 2, the reference surface for supporting the part is in contact with the lower end face of the support housing. The upper end face of the reference ring 8 is provided with an oblique positioning hole 15. The oblique positioning hole 15 is provided with a positioning pin 16. One end of the positioning pin 16 is inserted into the support housing. Through the action of the oblique positioning hole 15 and the positioning pin 16, the support housing is positioned in the circumferential direction to ensure that the axis of the oblique fine oil passage hole is coplanar with the center line of the positioning plate 2.

[0030] The lower part of the reference cylinder 3 is provided with a drill sleeve positioning hole A17, and the positioning plate 2 is provided with a drill sleeve positioning hole B10. The drill sleeve positioning hole A17 and the drill sleeve positioning hole B10 are connected by a pin. The angle of the drill sleeve positioning hole A17 is consistent with the inclined hole positioning hole 15, which is used to ensure that the axis of the drill sleeve on the reference cylinder 3 is coplanar with the center line of the positioning plate 2.

[0031] The upper part of the reference cylinder 3 has a support surface 19, which contacts the lower end face of the small end of the support casing, thereby improving the stability of the support casing after it is fixed.

[0032] The upper part of the reference cylinder 3 is provided with a radial positioning surface 20, which is in close contact with the inner hole of the small end of the support casing to position the small end of the support casing and prevent the position of the oil passage hole from changing due to the deformation of the parts during the processing.

[0033] The upper part of the reference cylinder 3 has a drill sleeve 21. The axis of the drill sleeve 21 is coplanar with the center line of the positioning plate 2, and the center line of the drill sleeve 21 is vertically downward. The drill sleeve 21 is located directly above the drilling position of the support casing, ensuring that the cutting direction of the tool is vertically downward during processing.

[0034] The inclined support plate 5 has two weight-reducing grooves in the middle, and the positioning plate 2 has seven weight-reducing holes in the middle, which are used to reduce the weight of the fixture.

Claims

1. A high-precision, oblique, fine oil passage hole rapid machining fixture for supporting the casing, characterized in that: It includes support base (1), positioning plate (2) and reference cylinder (3), the support base (1) is equipped with horizontal support plate (4) and inclined support plate (5), the horizontal support plate (4) is fixed on machine tool, the inclined support plate (5) is fixed on the horizontal support plate (4) in an inclined manner, and the inclined support plate (5) controls the inclination angle of the support cartridge;The positioning plate (2) is fixedly installed on the upper end surface of the inclined support plate (5);The positioning plate (2) is provided with a reference ring (8), the lower end surface of the reference ring (8) is attached to the upper end surface of the positioning plate (2), and the reference ring (8) is provided with a bolt hole B (9), and the reference ring (8) is connected with the positioning plate (2) by bolts; A plurality of bolt holes A (11) are arranged in the middle of the positioning plate (2), the lower part of the reference cylinder (3) is fixed on the positioning plate (2) by bolts, and the screw passes through the bolt hole A (11);The upper part of the reference cylinder (3) has a support surface (19), the support surface (19) is in contact with the lower end surface of the small end of the support cartridge;The upper part of the reference cylinder (3) is provided with a radial positioning surface (20), the radial positioning surface (20) is attached to the inner hole of the small end of the support cartridge, and the upper part of the reference cylinder (3) is provided with a drill sleeve (21), the axis of the drill sleeve (21) is coplanar with the center line of the positioning plate (2), and the center line of the drill sleeve (21) is vertically downward, and the drill sleeve (21) is located directly above the drilling position of the support cartridge; The upper end surface of the reference ring (8) is provided with an inclined hole positioning hole (15) and a ring positioning hole (14), and the axis of the ring positioning hole (14) has an angle of 45° with the center line of the positioning plate (2).

2. The high-precision oblique fine oil passage hole fast machining clamp for supporting the bearing chamber according to claim 1, characterized in that: The inclined support plate (5) and the horizontal support plate (4) are fixedly connected and have a positioning surface (6), and the lower part of the positioning plate (2) abuts against the positioning surface (6).

3. The high-precision oblique fine oil passage hole fast machining clamp for supporting the bearing chamber according to claim 1, characterized in that: The outer periphery of the reference ring (8) is provided with a pressing plate (13), and the pressing plate (13) is fixed on the positioning plate (2) by bolts, when the support cartridge is installed on the positioning plate (2), one end of the pressing plate (13) is tightly pressed on the support cartridge.

4. The high-precision oblique fine oil passage hole fast machining clamp for supporting the bearing chamber according to claim 1, characterized in that: The upper end surface of the reference ring (8) is a part supporting reference surface, when the support cartridge is installed on the positioning plate (2), the part supporting reference surface is attached to the lower end surface of the support cartridge, and the upper end surface of the reference ring (8) is provided with an inclined hole positioning hole (15), the inclined hole positioning hole (15) is provided with a positioning pin (16), and one end of the positioning pin (16) is inserted into the support cartridge.

5. The high-precision inclined fine oil passage hole quick processing clamp for supporting the bearing chamber according to claim 1, characterized in that: The lower part of the reference cylinder (3) is provided with a drill sleeve positioning hole A (17), and the positioning plate (2) is provided with a drill sleeve positioning hole B (10), the drill sleeve positioning hole A (17) and the drill sleeve positioning hole B (10) are connected by a pin.

6. The high-precision inclined fine oil passage hole quick processing clamp for supporting the bearing chamber according to claim 1, characterized in that: The inclined support plate (5) has two weight reduction grooves in the middle, and the positioning plate (2) has seven weight reduction holes in the middle.

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