Positioning fixture for fuel main pipe hole milling and type checking

Abstract

The application discloses a positioning clamp for fuel main pipe hole milling and type checking, which comprises a bottom plate, a positioning and type checking assembly fixedly arranged on the top surface of the bottom plate, a first checking assembly fixedly arranged on the top surface of the bottom plate and located outside the end hole of the fuel main pipe, a second checking assembly fixedly arranged on the top surface of the bottom plate and located inside the fuel main pipe, and a third checking assembly fixedly arranged on the top surface of the bottom plate and located outside the fuel main pipe. The positioning clamp is accurate in positioning and checking, convenient in detection, ensures the machining quality of the fuel main pipe, and is high in machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of parts processing technology, and in particular to a positioning fixture for checking the milling hole of a fuel main pipe. Background Technology

[0002] like Figure 2 The fuel main pipe shown is a crucial component of an aero-engine, and its machining quality directly impacts the engine's overall quality. This fuel main pipe is semi-circular; after bending it into shape, the end holes and shaped holes at both ends need to be machined. When the fuel main pipe is placed horizontally, several first-shaped holes are formed along its axial direction on its top surface, and second-shaped holes are formed radially on its outer side. Because this fuel main pipe is thin and easily deformed, the machining accuracy of its structural features is difficult to guarantee; after machining, each structural feature also needs to be inspected. Therefore, a positioning fixture for milling and calibrating the fuel main pipe is designed to ensure both machining quality and efficiency. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a positioning fixture for milling and inspection of fuel main pipes, which is accurate in positioning, convenient and accurate in inspection, ensures the machining quality of fuel main pipes, and has high machining efficiency.

[0004] This invention provides a positioning fixture for checking the milling hole of a fuel main pipe, comprising:

[0005] Base plate;

[0006] The positioning and alignment component is fixedly installed on the top surface of the base plate and is used to position, fix and align the fuel main pipe.

[0007] The first inspection component is fixedly installed on the top surface of the base plate, located outside the end hole of the fuel main pipe, and is used to inspect the end hole of the fuel main pipe.

[0008] The second inspection component is fixedly installed on the top surface of the base plate and located inside the fuel main pipe, and is used to inspect each of the first type holes of the fuel main pipe.

[0009] The third inspection component is fixedly installed on the top surface of the base plate, located on the outside of the fuel main pipe, and is used to inspect the second type hole of the fuel main pipe.

[0010] Furthermore, supports are symmetrically fixed on both sides of the bottom surface of the base plate; and transfer rods are symmetrically arranged on both sides of the base plate, with one end of the transfer rod threadedly connected to the base plate.

[0011] Furthermore, the positioning and alignment assembly includes a plurality of positioning seats fixedly disposed on the top surface of the base plate. The plurality of positioning seats are arranged in an arc shape adapted to the fuel pipe. The top of the positioning seat is provided with a positioning groove that matches the contour of the fuel pipe. A pressure block is disposed above the positioning groove. The pressure block is fixedly connected to the positioning seat by screws.

[0012] Furthermore, the first inspection component includes a first inspection seat and a first inspection pin. The first inspection seat is fixedly disposed on the top surface of the base plate and has a first inspection hole coaxial with the end hole. The first inspection pin passes through the first inspection hole with clearance fit, and a first inspection head with clearance fit to the inner diameter of the end hole is fixedly disposed at one end of the first inspection pin.

[0013] Furthermore, the second inspection component includes a second inspection seat and a second inspection pin. The top surface of the base plate is fixedly provided with a plurality of second inspection seats corresponding one-to-one with the first type hole on the inner side of the fuel main pipe. The top end of the second inspection seat extends above the corresponding first type hole and has a second inspection hole coaxial with the first type hole. The second inspection pin passes through the second inspection hole with clearance fit. The bottom end of the second inspection pin is fixedly provided with a second inspection head with clearance fit to the inner diameter of the first type hole.

[0014] Furthermore, the third inspection component includes a third inspection seat and a third inspection pin. The third inspection seat is fixedly disposed on the top surface of the base plate, located outside the second-type hole, and has a third inspection hole coaxial with the second-type hole. The third inspection pin passes through the third inspection hole with clearance fit, and one end of the third inspection pin is fixedly disposed with a third inspection head that has clearance fit with the inner diameter of the third-type hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The positioning fixture of this invention includes a positioning and alignment component, a first inspection component, a second inspection component, and a third inspection component. When machining the fuel main pipe, the positioning and alignment component first positions and fixes the bent fuel main pipe, then the machining equipment is used to machine its various structural features. Next, the positioning and alignment component holds the pipe in position for a period of time to complete the alignment. Finally, the inspection components inspect each structural feature of the fuel main pipe. The positioning fixture of this application provides accurate positioning and convenient and accurate inspection, ensuring the machining quality of the fuel main pipe and improving machining efficiency.

[0017] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the main structure of the positioning fixture.

[0020] Figure 2 This is a top view of the positioning fixture.

[0021] Figure 3 This is a top view of the positioning seat.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the positioning seat;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the first inspection component;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the second inspection component;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the third inspection component.

[0026] The diagram labels are as follows: 1. Base plate; 2. Positioning and alignment assembly; 3. First inspection assembly; 4. Second inspection assembly; 5. Third inspection assembly; 6. Fuel main pipe;

[0027] 11. Support; 12. Moving rod;

[0028] 21. Positioning seat; 22. Positioning groove; 23. Pressure block; 24. Screw;

[0029] 31. First inspection seat; 32. First inspection pin; 33. First inspection hole; 34. First inspection head;

[0030] 41. Second inspection seat; 42. Second inspection pin; 43. Second inspection hole; 44. Second inspection head;

[0031] 51. Third inspection seat; 52. Third inspection pin; 53. Third inspection hole; 54. Third inspection head. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Please refer to Figures 1 to 7 An embodiment of the present invention provides a positioning fixture for checking the milling hole of a fuel main pipe, comprising:

[0035] Base plate 1;

[0036] Positioning and alignment component 2 is fixedly installed on the top surface of base plate 1 and is used to position, fix and align fuel pipe 6.

[0037] The first inspection component 3 is fixedly installed on the top surface of the base plate 1 and located outside the end hole of the fuel main pipe 6, and is used to inspect the end hole of the fuel main pipe 6.

[0038] The second inspection component 4 is fixedly installed on the top surface of the base plate 1 and located inside the fuel main pipe 6. It is used to inspect each of the first type holes of the fuel main pipe 6.

[0039] The third inspection component 5 is fixedly installed on the top surface of the base plate 1, located on the outside of the fuel main pipe 6, and is used to inspect the second type hole of the fuel main pipe 6.

[0040] In this embodiment, after the fuel main pipe 6 is bent and formed, its two ends have a reserved allowance. At this time, the various structural features on it are machined. First, the bent fuel main pipe 6 is positioned and fixed by the positioning and straightening assembly 2, fixing it on a horizontal plane and ensuring that its curvature is consistent with the design parameters. Then, the fuel main pipe 6 and the positioning fixture are placed together on the machining equipment. First, the excess allowance at both ends of the fuel main pipe 6 is removed, and then the end holes are milled; then, the first type holes on its top are milled, and then the second type holes on its outer side are milled, completing the machining of the various structural features of the fuel main pipe 6.

[0041] Then, the fuel main pipe 6 and the positioning fixture are removed, and the fuel main pipe 6 is held in place for a period of time to remove machining stress, completing the calibration of the fuel main pipe 6. Finally, the positional accuracy of the end holes of the fuel main pipe 6 is checked by the first inspection component 3, the positional accuracy of each first-type hole of the fuel main pipe 6 is checked by the second inspection component 4, and the positional accuracy of the second-type holes of the fuel main pipe 6 is checked by the third inspection component 5. The positioning fixture of this application realizes the milling, calibration, and inspection of the fuel main pipe 6, with accurate positioning and convenient and accurate inspection, ensuring the machining quality of the fuel main pipe 6 and improving machining efficiency.

[0042] In a preferred embodiment, such as Figure 1 and Figure 2As shown, supports 11 are symmetrically fixed on both sides of the bottom surface of the base plate 1 to support the base plate 1; and transfer rods 12 are symmetrically arranged on both sides of the base plate 1. One end of the transfer rod 12 is threadedly connected to the base plate 1 to facilitate the movement of the positioning fixture by the transfer rod 12.

[0043] In a preferred embodiment, such as Figures 1-4 As shown, the positioning and alignment component 2 includes several positioning seats 21 fixedly disposed on the top surface of the base plate 1. The several positioning seats 21 are arranged in an arc shape to match the fuel pipe 6. The top of the positioning seat 21 is provided with a positioning groove 22 that matches the outline of the fuel pipe 6. A pressure block 23 is provided above the positioning groove 22. The pressure block 23 is fixedly connected to the positioning seat 21 by screws 24.

[0044] In this embodiment, the positioning seat 21 is distributed according to the design curvature of the fuel main pipe 6, and the positioning groove 22 matches the contour of the fuel main pipe 6. After the fuel main pipe 6 is embedded into each positioning groove 22, the positioning is completed, and its curvature is consistent with the design parameters. Then, each pressure block 23 is fixedly installed onto the positioning seat 21 one by one with screws 24 to press and fix the fuel main pipe 6. The positioning is accurate and the fixing is stable, ensuring the processing quality of the fuel main pipe 6.

[0045] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 5 As shown, the first inspection component 3 includes a first inspection seat 31 and a first inspection pin 32. The first inspection seat 31 is fixedly disposed on the top surface of the base plate 1, and a first inspection hole 33 coaxial with the end hole is opened on it. The first inspection pin 31 passes through the first inspection hole 33 with clearance fit. One end of the first inspection pin 31 is fixedly disposed with a first inspection head 34 with clearance fit to the inner diameter of the end hole.

[0046] In this embodiment, after the fuel main pipe 6 is machined and calibrated, the first inspection pin 32 is passed through the first inspection hole 33. If the first inspection head 34 can be smoothly inserted into the corresponding end hole, the position of the end hole is qualified; otherwise, it does not meet the requirements. The operation is convenient, the inspection is accurate, and the machining quality of the fuel main pipe 6 is guaranteed.

[0047] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 6 As shown, the second inspection assembly 4 includes a second inspection seat 41 and a second inspection pin 42. The top surface of the base plate 1 is located inside the fuel main pipe 6 and a plurality of second inspection seats 41 are fixedly provided, each corresponding to a first-type hole. The top of the second inspection seat 41 extends above the corresponding first-type hole and has a second inspection hole 43 coaxial with the first-type hole. The second inspection pin 42 passes through the second inspection hole 43 with clearance fit. The bottom end of the second inspection pin 42 is fixedly provided with a second inspection head 44 with clearance fit to the inner diameter of the first-type hole.

[0048] In this embodiment, after the fuel main pipe 6 is machined and calibrated, each second inspection pin 42 is passed through the second inspection hole 43 one by one. If the second inspection head 44 can be smoothly inserted into the corresponding first-type hole, the position accuracy of the first-type hole is qualified; otherwise, it does not meet the requirements. The operation is convenient, the inspection is accurate, and the machining quality of the fuel main pipe 6 is guaranteed.

[0049] In a preferred embodiment, such as Figure 2 and Figure 7 As shown, the third inspection component 5 includes a third inspection seat 51 and a third inspection pin 52. The third inspection seat 51 is fixedly installed on the top surface of the base plate 1, located outside the second-type hole, and has a third inspection hole 53 coaxial with the second-type hole. The third inspection pin 52 passes through the third inspection hole 53 with clearance fit, and a third inspection head 54 with clearance fit to the inner diameter of the third-type hole is fixedly installed at one end of the third inspection pin 52.

[0050] In this embodiment, after the fuel main pipe 6 is machined and calibrated, the third inspection pin 52 is passed through the third inspection hole 53. If the third inspection head 54 can be smoothly inserted into the corresponding second-type hole, the position accuracy of the second-type hole is qualified; otherwise, it does not meet the requirements. The operation is convenient, the inspection is accurate, and the machining quality of the fuel main pipe 6 is guaranteed.

[0051] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A positioning fixture for checking and calibrating milled holes in a fuel main pipe, characterized in that, include: Base plate (1); The positioning and alignment component (2) is fixedly installed on the top surface of the base plate (1) and is used to position and align the fuel pipe (6). The positioning and alignment component (2) includes several positioning seats (21) fixedly installed on the top surface of the base plate (1). The several positioning seats (21) are arranged in an arc shape to match the fuel pipe (6). The top of the positioning seat (21) is provided with a positioning groove (22) that matches the outline of the fuel pipe (6). A pressure block (23) is provided above the positioning groove (22). The pressure block (23) is fixedly connected to the positioning seat (21) by screws (24). The first inspection component (3) is fixedly installed on the top surface of the base plate (1) and located outside the end hole of the fuel main pipe (6) for inspecting the end hole of the fuel main pipe (6). The first inspection component (3) includes a first inspection seat (31) and a first inspection pin (32). The first inspection seat (31) is fixedly installed on the top surface of the base plate (1) and has a first inspection hole (33) coaxial with the end hole. The first inspection pin (32) passes through the first inspection hole (33) with clearance fit. One end of the first inspection pin (32) is fixedly provided with a first inspection head (34) with clearance fit to the inner diameter of the end hole. The second inspection component (4) is fixedly installed on the top surface of the base plate (1) and located inside the fuel main pipe (6) for inspecting each of the first type holes of the fuel main pipe (6). The second inspection component (4) includes a second inspection seat (41) and a second inspection pin (42). The top surface of the base plate (1) is located inside the fuel main pipe (6) and a plurality of second inspection seats (41) corresponding to the first type holes are fixedly installed. The top end of the second inspection seat (41) extends above the corresponding first type hole and has a second inspection hole (43) coaxial with the first type hole. The second inspection pin (42) passes through the second inspection hole (43) with clearance fit. The bottom end of the second inspection pin (42) is fixedly installed with a second inspection head (44) with clearance fit to the inner diameter of the first type hole. The third inspection component (5) is fixedly installed on the top surface of the base plate (1) and located outside the fuel main pipe (6), and is used to inspect the second type hole of the fuel main pipe (6); the third inspection component (5) includes a third inspection seat (51) and a third inspection pin (52). The third inspection seat (51) is fixedly installed on the top surface of the base plate (1) and located outside the second type hole. A third inspection hole (53) coaxial with the second type hole is opened on it. The third inspection pin (52) passes through the third inspection hole (53) with clearance fit. One end of the third inspection pin (52) is fixedly provided with a third inspection head (54) with clearance fit to the inner diameter of the third type hole; When processing the fuel main pipe (6), the bent fuel main pipe (6) is first positioned and fixed by the positioning and straightening assembly (2). Then, the end hole, the first type hole and the second type hole are machined by the machining equipment. The positioning and straightening assembly (2) is used to hold the positioning for a period of time to complete the straightening. Finally, the end hole, the first type hole and the second type hole are inspected by the first inspection assembly (3), the second inspection assembly (4) and the third inspection assembly (5) respectively.

2. The positioning fixture for checking and calibrating the milled hole of the fuel main pipe according to claim 1, characterized in that, Supports (11) are symmetrically fixed on both sides of the bottom surface of the base plate (1); a moving rod (12) is symmetrically arranged on both sides of the base plate (1), and one end of the moving rod (12) is threadedly connected to the base plate (1).

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