Method for drawing grid lines of inclined slipway

Abstract

The invention discloses a method for drawing grid lines of an inclined slipway. The method specifically comprises the steps of drawing a slipway center line on an inclined plane of the inclined slipway; establishing a three-dimensional coordinate system, wherein the XY plane of the three-dimensional coordinate system is parallel to the inclined plane of the inclined shipway; finding out the position of a 0# rib position on the center line of the slipway by using a total station and marking; finding out the position of each rib position on the ship on the center line of the slipway according tothe slipway grid line diagram; taking the 0# rib position marked on the center line of the slipway as an original point of the three-dimensional coordinate system, and respectively marking an angle square line perpendicular to the center line of the slipway at each rib position of the inclined slipway and the slideway by using the total station. The method is easy and convenient to operate, the slipway slope error caused by a traditional slipway grid line forming method is eliminated, the segmented positioning efficiency and segmented positioning precision quality of slipway construction areimproved, and the slipway production efficiency is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of ship construction, in particular to a method for drawing a grid line of a slant slipway. Background technique [0002] In order to ensure the smooth construction of the ship on the slipway, the hull grid line must be opened on the inclined slipway. The precise slipway grid line is the key to ensuring the accuracy of shipbuilding on the slipway. [0003] The traditional method of drawing the grid line of the berth is to determine the center line of the berth according to one point at each end of the slipway of the berth, use a laser theodolite to draw the center line of the berth, and pop it out with a powder line and paint it. Then draw the FRO point on the center line of the slipway according to the design position of the FRO on the "Slipway Grid Line Drawing", use a long tape measure to extend from the FRO point to the bow, mark out each rib position on the centerline of the slipway, and then use the laser the...

AI Technical Summary

Problems solved by technology

However, the square line drawn in this way is only perpendicular to the large ground, and not perpendicular to the inclined berth, so there will be a certain slope difference between the actual square line and the theoretical line drawn on the slideway, such as image 3 , Figure 4 As shown, there will be a large accuracy error in the grid line drawn in this way, which will cause a large deviation in the planarity and verticality of the fore and stern of the end face of the segment positioned by the grid line of the slipway, which will affect the segment The installation accuracy on the berth greatly affects the shipbuilding accuracy and production efficiency

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