A large-scale hemispherical part inner arc surface space size rapid measuring tool for aerospace

Abstract

The utility model discloses a large -scale hemispherical part inner arc surface space size quick measuring frock for aerospace, frock includes support piece, and the vernier caliper is set up on support piece upper end, and support piece includes circular bottom plate, and the support column is fixedly connected with circular bottom plate upper end, and the thickness size of circular bottom plate and the center hole of the bottom of the measured hemispherical shell is identical, and the total height of support piece is identical with the axis height of measured size, this frock can complete the measuring work fast in the production field, need not many times turnover parts, has greatly shortened the detection time, has satisfied the requirement of production progress.

Description

Technical Field

[0001] This utility model relates to the field of aerospace parts measurement technology, specifically a tooling for rapid measurement of the spatial dimensions of the inner arc surface of a large hemispherical aerospace part. Background Technology

[0002] Large hemispherical components used in aerospace applications serve as key shell structures for launch vehicle bodies, exhibiting highly unique structural dimensions: their diameter typically exceeds 3 meters, the hemispherical axis height reaches over 1 meter, and a pre-designed central opening at the bottom (e.g., ...). Figure 1 (As shown). The inner arc surface of this type of part needs to be precisely assembled and welded with various components. The lateral positioning accuracy of the part directly depends on its vertical distance from the axis of the hemispherical shell—this parameter is a typical large spatial dimension, and the measurement reference is the spatial axis inside the part, which is extremely difficult to measure.

[0003] The current measurement process in the industry has significant bottlenecks: First, a special positioning fixture needs to be designed according to the drawings for the pre-positioning of parts; then, the hemispherical parts weighing hundreds of kilograms need to be transferred to a special measurement platform, where professional metrology personnel operate a laser tracker to complete data acquisition; after adjusting the positioning based on the measurement results, the parts are transferred back to the production site for assembly and welding; after completion, they need to be transferred to the measurement platform again for finished product inspection.

[0004] The drawbacks of this model are particularly prominent: laser trackers are not only expensive to purchase, but also have stringent operating environment requirements, making them unsuitable for direct online inspection on the production floor; multiple parts transfers and the need for more than 10 people to work together, with each inspection cycle taking at least half a day, severely restricts production progress; frequent transfers may also damage the precision of parts due to bumps and knocks, further increasing quality risks. Therefore, developing a low-cost and efficient measuring fixture that can be used directly on the production floor has become a key requirement for overcoming current technological bottlenecks. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for rapid measurement of the spatial dimensions of the inner arc surface of large hemispherical parts used in aerospace, so as to solve the problems in the background art that conventional measuring tools cannot measure and that laser trackers are costly and have long cycles.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tooling for rapid measurement of the spatial dimensions of the inner arc surface of a large hemispherical part for aerospace use, the tooling including a support member (1), and a vernier caliper (2) mounted on the upper end of the support member (1);

[0008] The support member (1) includes a circular base plate (11), and a support column (12) is fixedly connected to the upper end of the circular base plate (11). The thickness of the circular base plate (11) is consistent with the hole depth of the center hole at the bottom of the workpiece being measured. The total height of the support member (1) is consistent with the height of the axis of the measured dimension of the workpiece being measured.

[0009] As a preferred embodiment, the circular base plate (11) has steps on its sidewalls.

[0010] As a preferred embodiment, a rubber ring (3) is provided below the step.

[0011] As a preferred embodiment, the vernier caliper (2) has a measuring range of (0~500) mm and an accuracy of 0.02 mm.

[0012] As a preferred embodiment, a through hole is provided in the middle of the circular base plate (11) and the support column (12).

[0013] This utility model has the following advantages:

[0014] I. This fixture, by setting up a support component (1) and a vernier caliper (2), can directly measure the spatial dimensions of the inner arc surface of large hemispherical parts for aerospace applications on the production site without having to move the parts to a dedicated measurement platform. This solves the problems of conventional measuring tools being unable to perform scribing and positioning and online inspection, as well as the high cost and long cycle of using laser trackers.

[0015] 2. A through hole is provided in the middle of the circular base plate (11) and the support column (12). The through hole can reduce the overall weight of the tooling and make it easy to carry and use. On the other hand, it can also be used as a positioning pin hole when the tooling is heightened later, which enhances the practicality and flexibility of the tooling.

[0016] In summary, the measuring fixture described in this utility model is simple in principle, low in cost, and highly applicable. Practical experience has proven that it is a novel and convenient method that is very suitable for measuring the internal spatial dimensions of large hemispherical shell components in the aerospace and related industries. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a large hemispherical part.

[0018] Figure 2 This is a schematic diagram of a tooling system for rapid measurement of the spatial dimensions of the inner arc surface of a large hemispherical part used in aerospace.

[0019] Figure 3 This is a cross-sectional view of a support component for a rapid measurement tooling device for the spatial dimensions of the inner arc surface of a large hemispherical part used in aerospace.

[0020] In the diagram: 1-Support component, 11-Circular base plate, 12-Support column, 2-Vernier caliper, 3-Rubber ring. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Example 1:

[0024] like Figures 2-3 As shown,

[0025] A tooling for rapid measurement of the spatial dimensions of the inner arc surface of a large hemispherical part for aerospace use, the tooling includes a support (1), and a vernier caliper (2) is mounted on the upper end of the support (1);

[0026] The support member (1) includes a circular base plate (11), and a support column (12) is fixedly connected to the upper end of the circular base plate (11). The thickness of the circular base plate (11) is consistent with the hole depth of the bottom center hole of the workpiece being measured. The total height of the support member (1) is consistent with the height of the axis of the measured dimension of the workpiece being measured.

[0027] Support component (1): The support component (1) consists of a circular base plate (11) and a support column (12). The upper end of the circular base plate (11) is fixedly connected to the support column (12). The function of the circular base plate (11) is to achieve precise positioning of the tooling and the hemispherical shell to be measured. Its thickness is consistent with the bottom center hole of the hemispherical shell to be measured, and it can be precisely embedded in the bottom center hole, providing a stable support foundation for the entire tooling, ensuring that the tooling will not shake during measurement, and ensuring the stability of the measurement reference. The function of the support column (12) is to support the vernier caliper (2), so that it can be used for measurement. At a suitable measuring height, the total height of the support (1) is consistent with the axial height of the dimension being measured. In this way, the measuring reference of the vernier caliper (2) coincides with the axial height of the dimension being measured, ensuring the accuracy of the measurement and solving the problem of the difficulty in determining the measuring reference in the past. The vernier caliper (2) is a component that directly performs dimensional measurement. It is mounted on the upper end of the support column (12) and can measure the vertical distance between the parts on the inner arc surface of a large hemispherical part and the axis of the hemispherical shell. Compared with conventional measuring tools, it can adapt to the measurement of large spatial dimensions and is easy to operate.

[0028] The circular base plate (11) has steps on its side wall.

[0029] The main function of the step is to enhance the tightness of the fit between the circular base plate (11) and the bottom center hole of the hemispherical shell being measured. When the circular base plate (11) is embedded in the bottom center hole, the step can engage with the edge of the hole, further restricting the movement of the circular base plate (11) in the hole, improving the stability of the support (1) installation and the accuracy of positioning, and reducing the measurement error caused by tooling shaking.

[0030] A rubber ring is installed at the bottom of the step (3)

[0031] As a flexible buffer layer, the rubber ring (3) can effectively isolate the rigid contact between the step and the edge of the shell hole. When installing and adjusting the support, it can prevent the step from bumping or scratching the shell and protect the surface quality of the shell. For parts with high precision requirements in the aerospace field, this protective function is particularly important.

[0032] The vernier caliper (2) has a measuring range of (0~500) mm and an accuracy of 0.02 mm.

[0033] This measurement range can meet the measurement requirements of the inner arc surface space of large hemispherical parts for aerospace applications, covering the range of lateral positioning dimensions of common parts; the accuracy of 0.02mm ensures the accuracy of the measurement results, which can meet the accuracy requirements of parts assembly and welding. Compared with laser trackers, although the accuracy may be slightly lower, it is sufficient to meet the online inspection needs of the production site, and the cost is lower and the operation is simpler.

[0034] A through hole is provided in the middle of the circular base plate (11) and the support column (12).

[0035] The through-hole design has several advantages: First, it reduces the overall weight of the tooling, making it easier to carry, move, and install on the production site, thus reducing the labor intensity of operators; second, it serves as a locating pin opening when the tooling is heightened later, enhancing the practicality and flexibility of the tooling.

[0036] The process of using measuring fixtures:

[0037] Preparation phase: Place the large hemispherical aerospace component to be tested in a suitable location on the production site to ensure its stability.

[0038] Install the support (1): Insert the circular base plate (11) of the support (1) into the center hole at the bottom of the hemispherical shell to be measured. Since the thickness of the circular base plate (11) is consistent with that of the hole and the side wall is provided with a step, the support (1) can be installed on the part accurately and stably. At this time, the total height of the support (1) is consistent with the axial height of the measured dimension, thus determining the measurement reference.

[0039] Setting up the vernier caliper (2): The vernier caliper (2) is set up on the support column (12). The rubber ring (3) on the outside of the support column (12) ensures the stable placement of the vernier caliper (2).

[0040] Measurement stage: The operator operates the vernier caliper (2) to measure the vertical distance between the parts that need to be assembled and welded on the inner arc surface of the hemispherical part and the axis of the hemispherical shell, reads and records the measurement data (the value measured by the caliper needs to be reduced by the radius value of the support column (12) to get the measured value of the dimension).

[0041] Measurement completed: After the measurement is completed, remove the vernier caliper (2) from the support column (12) and then remove the support (1) from the part being measured to complete the entire measurement process.

[0042] In this embodiment, the tooling can quickly complete the measurement work on the production site without the need for multiple parts transfers, which greatly shortens the inspection time and meets the production schedule requirements.

[0043] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A tooling for rapid measurement of the spatial dimensions of the inner arc surface of a large hemispherical part for aerospace applications, characterized in that: The tooling includes a support member (1), and a vernier caliper (2) is mounted on the upper end of the support member (1); The support member (1) includes a circular base plate (11), and a support column (12) is fixedly connected to the upper end of the circular base plate (11). The thickness of the circular base plate (11) is consistent with the hole depth of the center hole at the bottom of the workpiece being measured. The total height of the support member (1) is consistent with the height of the axis of the measured dimension of the workpiece being measured.

2. The rapid measurement fixture for the inner arc surface spatial dimensions of a large hemispherical part for aerospace applications according to claim 1, characterized in that: The circular base plate (11) has steps on its side wall.

3. The rapid measurement fixture for the inner arc surface spatial dimensions of a large hemispherical part for aerospace applications according to claim 2, characterized in that: A rubber ring (3) is provided below the step.

4. The rapid measurement fixture for the inner arc surface spatial dimensions of a large hemispherical part for aerospace applications according to claim 1, characterized in that: The vernier caliper (2) has a measuring range of (0~500) mm and an accuracy of 0.02 mm.

5. The rapid measurement fixture for the inner arc surface spatial dimensions of a large hemispherical part for aerospace applications according to claim 1, characterized in that: The circular base plate (11) and the support column (12) have through holes in their middle parts.

Images