Appearance inspection tool suitable for aero-engine pipeline

Abstract

The utility model belongs to the technical field of tools, and particularly discloses an appearance inspection tool suitable for an aero-engine pipeline, which comprises a bottom plate, a profiling positioning block, a knife ruler and an appearance envelope inspection unit, the profiling positioning block is fixed on the appearance envelope inspection unit through a screw to form a pipeline appearance inspection tool main body unit; the pipeline appearance testing fixture main body unit is fixed on the bottom plate through an elastic positioning pin; the knife ruler is an appearance inspection gauge block; the profiling positioning block carries out simulation installation positioning on a pipe joint of a to-be-detected special-shaped pipe product, and a pipe body of the special-shaped pipe product is placed on the appearance enveloping detection unit. According to the utility model, the appearance inspection method of the aero-engine pipeline is optimized, and the product appearance inspection function is realized through head end positioning, pipe body enveloping, tail end tolerance detection and knife ruler horizontal pushing inspection interference.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling components, and in particular relates to a shape inspection tool suitable for aviation engine pipelines. Background Art

[0002] Aircraft engine design involves numerous complex technical and engineering considerations, with piping layout being a crucial aspect. To optimize airflow and thermal management, reduce drag, accommodate space constraints, and reduce weight, piping is often designed with special shapes. These special shapes present challenges in manufacturing, inspection, and installation.

[0003] Currently, after forming, special-shaped tubes are typically inspected using a three-dimensional coordinate measuring machine (CMM). While the measurement accuracy meets design requirements, the bending points of the tubes can easily rebound when the joints are welded or other processes subject to heat and stress. This requires calibration and inspection. If every product is inspected using CMM, inspection capacity will be insufficient, leading to process delays. When installing special-shaped tubes in aircraft engines, pipe interference and misaligned interfaces are common. Forced installation can damage the engine casing interfaces, causing problems such as rubber ring shedding and oil leakage.

[0004] In order to improve the appearance inspection efficiency of aircraft engine pipelines and protect the interface size of aircraft engine casings at the same time, it is necessary to design an appearance inspection tool suitable for aircraft engine pipelines. Utility Model Content

[0005] The purpose of the utility model is to provide a tool for performing appearance inspection on the pipeline of an aircraft engine, thereby solving the problem of low efficiency of appearance inspection of the pipeline of an aircraft engine and ensuring the interface size of the aircraft engine casing.

[0006] The technical solution of the utility model is as follows: a shape inspection tool suitable for aircraft engine pipelines, comprising a base plate, a profiling positioning block, a ruler and a shape envelope inspection unit; the profiling positioning block is fixed to the shape envelope inspection unit by screws to form a pipeline shape inspection tool main unit; the pipeline shape inspection tool main unit is fixed to the base plate by elastic positioning pins; the ruler is a shape inspection gauge block; the profiling positioning block simulates the installation and positioning of the pipe joint of the special-shaped pipe product to be inspected, and the pipe body of the special-shaped pipe product is placed on the shape envelope inspection unit.

[0007] Furthermore, the inspection tool also includes a handle and a base plate support seat for easy transportation; the handle and base plate support seat are fixed to the base plate by riveting.

[0008] Furthermore, the bottom plate is made of an aluminum alloy plate, and the contour positioning block and the shape envelope inspection unit are both made of hard non-metallic materials.

[0009] The contour positioning block of the utility model is adjusted according to the qualified shape of the pipe joint of the special-shaped pipe product; and the shape envelope inspection unit is adjusted according to the qualified shape of the pipe body of the special-shaped pipe product.

[0010] The profiling positioning block is used to simulate the installation and positioning of the shaped pipe joint to be inspected. The shaped pipe body is placed on the shape envelope inspection unit. The ruler is then used to push horizontally along the upper surface of the shape envelope inspection unit to inspect the position of the pipe body. In addition, a tolerance band for the pipe body length is reserved at the tail end of the shape envelope inspection unit to inspect the accuracy of the shaped pipe joint.

[0011] The beneficial effects of the present invention are as follows: the appearance inspection method of aircraft engine pipelines is optimized, the interface is positioned at one end, an envelope area is set on the tube body, and a tolerance band detection is set on the other end, which can realize the function of special-shaped tube appearance inspection, and at the same time has the characteristics of simple clamping, strong operability, and quick and convenient. Interface positioning and interface tolerance band detection can achieve the role of simulated assembly to prevent the problem of interface misalignment during installation; the tube body envelope can achieve the role of simulated spatial layout to prevent the problem of pipeline interference during installation; the special-shaped tube has no clamping on the whole body to prevent product damage during the inspection process. Therefore, the present invention can solve the problems of insufficient inspection capacity and process stagnation, the product quality can be guaranteed during the special-shaped tube appearance inspection process, the engine casing interface size can be guaranteed, the safety hazards of special-shaped tube product damage and engine casing interface damage are eliminated, costs are saved, and the product appearance inspection quality and efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the appearance inspection tool for aircraft engine pipelines of the utility model;

[0013] Figure 2 for Figure 1 Schematic diagram of the side structure;

[0014] Figure 3 for Figure 1 Schematic diagram of the top view structure;

[0015] Figure 4 This is a schematic diagram of the use process of the tooling of the utility model;

[0016] Figure 5 for Figure 4 Schematic diagram of the top view structure.

[0017] The reference signs in the drawings are as follows: 1 - base plate, 2 - inner hexagonal cylindrical head screw, 3 - profiling positioning block, 4 - blade ruler, 5 - elastic positioning pin, 6 - outer shape envelope inspection unit, 7 - special-shaped pipe product, 8 - handle, 9 - base plate support seat. DETAILED DESCRIPTION

[0018] The utility model will be described in detail below in combination with the drawings and examples.

[0019] As Figure 1-3 shown, the utility model discloses a kind of outer shape inspection tool suitable for aeroengine pipeline, including bottom plate 1, profiling positioning block 3, blade ruler 4 and outer shape envelope inspection unit 6;Profiling positioning block 3 is fixed on the outer shape envelope inspection unit 6 by inner hexagonal cylindrical head screw 2, forms pipeline outer shape gauge main unit, and pipeline outer shape gauge main unit is fixed on the bottom plate 1 by elastic positioning pin 5;The blade ruler 4 is outer shape inspection block;Profiling positioning block 3 is simulated installation positioning to the pipe joint of special-shaped pipe product to be detected, and the pipe body of special-shaped pipe product is placed on the outer shape envelope inspection unit 6.

[0020] The utility model outer shape inspection tool can also include handle 8 and bottom plate support seat 9, handle 8 and bottom plate support seat 9 are fixed on bottom plate by riveting mode, and it is convenient to carry the utility model outer shape inspection tool.

[0021] As Figure 4 shown, profiling positioning block 3 can be adjusted and designed according to the pipe joint qualified outer shape (excluding sealing ring groove structure) of special-shaped pipe product 7, and profiling positioning block 3 is suggested to be matched with pipe joint with (0.1~0.2) mm gap, so as to avoid damaging pipe joint.

[0022] As Figure 5 shown, the outer shape envelope inspection unit 6 can be adjusted and designed according to the pipe body qualified outer shape (not including pipe joint matching part) of special-shaped pipe product 7, and outer shape envelope inspection unit 6 should be matched with pipe body with the position degree design gap required by product design, usually (1~3) mm.

[0023] As Figure 5 partial enlargement Figure I Shown, the outer shape envelope inspection unit 6 can reserve the tolerance band of pipe body length at tail end, and the tolerance band size should be designed with the length required by product design, usually ±1mm.

[0024] The specific steps of the special-shaped pipe product 7 are as follows:

[0025] (1) the pipe body of the special-shaped pipe product 7 is aligned with the outer shape envelope inspection unit 6, and the end is confirmed to fall into the gauge, then the next operation is carried out;

[0026] (2) keep the tube body and the test groove of the shape envelope inspection unit 6 aligned, and gently press the first end of the special-shaped tube product 7 into the profile positioning block 3, when the tube body can freely fall into the test groove of the shape envelope inspection unit 6, it is considered qualified; when it is difficult to press in or the tail end of the tube body cannot freely fall into the test groove of the shape envelope inspection unit 6 after pressing in, the product should be corrected;

[0027] (3) when the first end of the special-shaped tube product 7 is pressed into the profile positioning block 3, and the tube body freely falls into the test groove of the shape envelope inspection unit 6, check whether the end face of the special-shaped tube product 7 is within the tolerance band, if it is within the tolerance band, it is considered qualified; if it is not within the tolerance band, the product should be corrected;

[0028] (4) finally, use the ruler 4 to push along the surface of the shape envelope inspection unit 6, and if there is no interference, it is considered qualified; if there is interference, the product should be corrected.

Claims

1. A shape inspection tool suitable for aircraft engine pipelines, characterized by: It includes a base plate, a profiling positioning block, a ruler and an outer envelope inspection unit; the profiling positioning block is fixed to the outer envelope inspection unit by screws to form a pipeline outer shape inspection fixture main unit; the pipeline outer shape inspection fixture main unit is fixed to the base plate by elastic positioning pins; the ruler is an outer shape inspection gauge block; the profiling positioning block simulates the installation and positioning of the pipe joint of the special-shaped pipe product to be inspected, and the pipe body of the special-shaped pipe product is placed on the outer envelope inspection unit.

2. The appearance inspection tool for aircraft engine pipelines according to claim 1 is characterized in that: The profiling positioning block is adjusted according to the qualified shape of the pipe joint of the special-shaped pipe product; the shape envelope inspection unit is adjusted according to the qualified shape of the pipe body of the special-shaped pipe product.

3. The appearance inspection tool for aircraft engine pipelines according to claim 1 is characterized in that: A tolerance zone of the tube body length is reserved at the tail end of the shape envelope inspection unit.

4. The appearance inspection tool for aircraft engine pipelines according to claim 1 is characterized in that: It also includes a handle and a base plate support seat, and the handle and the base plate support seat are fixed to the base plate by riveting.

5. The appearance inspection tool for aircraft engine pipelines according to claim 1 is characterized in that: The bottom plate is made of an aluminum alloy plate, and the contour positioning block and the shape envelope inspection unit are both made of hard non-metallic materials.

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