Installation Auxiliary Tooling and Assembly Method for Fitting Bolts of Ship Shafting Flange

Abstract

A ship shafting flange fitting bolt installation assisting tool comprises two screw nuts, a tube core and an outer sheath, wherein the middle part of the tube core is cone-shaped, two ends of the tube core are provided with threads which match threads of the screw nuts, the outer sheath is of a tubular housing structure, the inner surface of the outer sheath is cone-shaped while the outer surface is cylinder-shaped, a slot is disposed in the length direction of the outer sheath, the outer sheath sleeves the tube core, and the screw nuts are connected in a threaded manner at the two ends of the tub core. An assembling method is also provided, and thus shafting connection is realized. With adoption of the method, damages caused to fitting bolts and bolt holes by defects of the bolt holes of flanges when the fitting bolts are inserted into the bolt holes of the flanges are avoided, and thus the resulting delay of a ship construction cycle and economic losses are avoided.

Description

technical field [0001] The invention relates to the installation technology related to large-scale shafting in shipbuilding, in particular to an installation auxiliary tool and an assembly method for tight fitting bolts of the flange of the ship's shafting. Background technique [0002] The connection between the shaft and the shaft of the ship is mostly connected by the shaft end flange, and the two flanges of the two adjacent shafts are connected by bolts, so as to achieve the connection of the two shafts. For the flange connection of the shaft system with high positioning requirements, the method of boring the flange bolt holes first and then installing the tight fit bolts is often used. After the bolt hole is bored, use the cylinder meter to measure the inner diameter of the bolt hole, and then transfer this value to the outer diameter separation card, and then process the tight fit bolts according to the data on the outer diameter separation card. Before installation, ...

AI Technical Summary

Problems solved by technology

[0003] First, due to the large thickness of the two flanges to be connected, the length of the fastening bolt hole on the flange is also large, so after the hole is bored, the axial deflection of the hole is relatively large, so that the fastening bolt cannot be tightened. good installation;

[0004] Second, before boring, it is necessary to connect and fix the shafting flange with thick bolts. The end face of the flange bolt hole will be squeezed, and the inner diameter of the bolt hole will become smaller, which may prevent the tight fit bolt from being installed well;

[0005] Third, due to the mismatch between the tight fit bolts and the tight fit bolt holes, the tight fit bolts and bolt holes will be damaged when the tight fit bolts are installed, making the tight fit bolts unusable or the tight fit bolt holes need to be repaired, which will lead to Cycle delays, resulting in irreparable economic losses

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