Rib plate allowance line scribing method and portable rib plate allowance line scribing device

Abstract

The invention discloses a rib plate allowance line scribing method. According to the method, firstly a main plate allowance line is drawn on a segmented main plate, then a plurality of rib plate allowance points are marked on a rib plate according to a rib plate allowance design standard, a portable rib plate allowance line scribing device is fit with the rib plate, a longitudinal wall is aligned with the segmented main plate allowance line, a rib plate lower opening of the device is aligned with a marked rib plate allowance point, and finally, a rib plate allowance line is drawn along the lower surface where a rib plate lower opening of the device is located. The invention further relates to the portable rib plate allowance line scribing device. The device is in a right trapezoid shape, the longitudinal wall is perpendicular to the rib plate lower opening, the longitudinal wall is a vertical straight line, the rib plate lower opening is a horizontal straight line, the right side is an inclined surface inclined upwards, and a horizontal line behind the inclined surface is vertical to the longitudinal wall. According to the method and the device, the rib plate allowance line scribing precision can be improved, meanwhile, the device is simple in structure and easy to carry, the carrying efficiency is improved, the labor intensity is reduced, and the segmented hoisting time is shortened.

Description

technical field [0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a method for marking a floor allowance line and a portable floor allowance line marking device. Background technique [0002] At present, in the process of ship construction, when the ship is assembled or loaded in sections, the positioning and marking accuracy of the closing mouth position is getting higher and higher. The amount needs to be trimmed in advance. [0003] Patent No. CN204913870U discloses a tool for marking lines with carrying margins for ships. The tool includes a main ruler with a scale line. The main ruler is provided with a moving groove arranged along its length direction, and the moving groove is movable. There is a moving ruler that can move back and forth along the moving groove. The moving ruler is parallel to the scale line of the main ruler. Move the moving groove to the position where the line needs to be marked, and read the margin ...

AI Technical Summary

Problems solved by technology

[0005] In the past shipbuilding, floor allowance lines were drawn in sections, and the floor allowance lines were drawn by dragging the allowance lines by hand or by snapping the lines on site. This method has poor accuracy when drawing floor allowances, resulting in The large error caused the high and low bumps in the transition area of ​​the thick and thin plates of the ribs during the segmental loading, and it needed to be trimmed again on site, resulting in low loading efficiency, high labor intensity, and increased time for segmental hoisting

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