Egg-shaped pressure-resistant shell rapid positioning measurement apparatus and measurement method

Abstract

The invention discloses an egg-shaped pressure-resistant shell rapid positioning measurement apparatus. The apparatus comprises a base, the base is provided with a pair of clamping centering mechanisms, each clamping centering mechanism clamps one end of an egg-shaped pressure-resistant shell, a measurement mechanism is installed on the base, the measurement mechanism comprises a support plate apparatus arranged on the base, the upper end of the support plate apparatus is provided with a through hole, the through hole is internally provided with a rotating shaft, the rotating shaft is provided with a circular positioning plate, the circular positioning plate is provided with two circumferentially uniformly arranged limiting holes, a support plate is provided with four circumferentially uniformly arranged positioning pin mechanisms used in pair with the limiting holes, the tail end of the rotating shaft is connected with a limiting plate, the limiting plate is provided with a groove, and the groove is internally provided with a calibrated scale sliding along the groove. According to the invention, active adjustment mechanisms, a rotation scale mechanism and a wide type measurement head are employed, the egg-shaped pressure-resistant shell is conveniently and rapidly clamped and positioned, it is ensured that the axis of the egg-shaped pressure-resistant shell is horizontally arranged, the measurement precision of a short shaft and a long shaft of the egg-shaped pressure-resistant shell is enabled to be high, and the efficiency is high.

Description

technical field [0001] The invention relates to a rapid positioning measuring device and a measuring method for an egg-shaped pressure-resistant shell, belonging to the field of measuring. Background technique [0002] The egg-shaped pressure hull is a rotating shell with a positive Gaussian curve. It has excellent mechanical properties under uniform loads and can be produced and applied to deep-sea submersibles. The long axis and short axis of the egg-shaped pressure shell are important factors affecting its own mechanical properties, so it is necessary to accurately measure the formed egg-shaped pressure shell after production and processing to ensure that its size meets the design requirements. At present, the most commonly used measurement tools are hand-held measuring instruments, such as vernier calipers, micrometers, calipers, etc., which are mainly aimed at the basic size measurement of conventional parts. The patent No. CN1334436A provides an accurate hand-held meas...

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Problems solved by technology

At present, the most commonly used measurement tools are hand-held measuring instruments, such as vernier calipers, micrometers, calipers, etc., which are mainly aimed at the basic size measurement of conventional parts. The patent No. CN1334436A provides an accurate hand-held measurement method. A force device and a force display device are added to the moving axial measuring rod, which can adjust the contact force between the connecting member and the measured object according to the material of the measured object, making the actual measurement results more accurate, but this measuring instrument is limited to parts. Measuring the shape of the surface; the invention patent with the patent number CN103406843A provides a measuring tool, by designing the thimble shaft on the two support arms to the end of the shaft part, and then the surface is carried out when the shaft part is clamped. Detection, this method is suitable for clamping and testing of general simple shaft parts, and it cannot be effectively clamped for rotating shells with complex surfaces

[0003] For the egg-shaped pressure shell with a special surface, the existing technology has the following disadvantages: the surface of the egg-shaped pressure shell is a curved surface, and it is impossible to accurately locate the position of the measurement point with a hand-held conventional measuring instrument, and it is easy to cause the deviation of the measurement point or the measurement point The asymmetry of the rotation axis leads to serious deviations in the measurement results; the two ends of the egg-shaped pressure shell are asymmetrical structures, and ordinary tooling cannot clamp both ends at the same time and ensure that the axis is placed horizontally, which increases the difficulty of actual measurement and is extremely difficult. It is easy to cause a large deviation between the measurement result and the true value

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