阅读说明：本技术 一种船舶建造中的平直型主板的基准线施工方法 (Datum line construction method for straight main board in ship construction ) 是由 冯敏超 孙建志 徐占勇 曹岭 蒋林勇 王镇浩 王洁 何经先 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种船舶建造中的平直型主板的基准线施工方法,在分段建造阶段拼焊出主板,以主板的无余量边为基准划出第一绝对基准线,第一绝对基准线距离主板的无余量边为预设值,在第一绝对基准线确定第一点和第二点,所述第一点距离所述主板的第一端为所述预设值,所述第一点和所述第二点距离为b,以所述第一点为圆心、a为半径在主板上做圆弧,以第二点为圆心,c为半径做圆弧,两个圆弧相交于第三点,其中,a～(2)+b～(2)＝c～(2),在主板上划出过所述第一点和所述第三点的第二绝对基准线,所述第二绝对基准线从所述主板的第三端延伸至所述主板的第四端,将所述第一绝对基准线平移L1划出第一辅助基准线,将所述第二基准线平移L划出第二辅助基准线。(The invention discloses a datum line construction method of a straight main board in ship construction, which comprises the steps of welding the main board in a segmented construction stage, drawing a first insulation datum line by taking the margin-free edge of the main board as a reference, wherein the distance between the first insulation datum line and the margin-free edge of the main board is a preset value, determining a first point and a second point on the first insulation datum line, the distance between the first point and the first end of the main board is the preset value, the distance between the first point and the second point is b, making an arc on the main board by taking the first point as a circle center and a as a radius, making an arc by taking the second point as a circle center and c as a radius, and intersecting the two arcs at the third point, wherein a 2 +b 2 ＝c 2 A second absolute reference line is scribed on the main board through the first and third points, the second absolute reference line extending from the third end of the main board to the fourth end of the main board, the first absolute reference line is translated by L1 to scribe a first auxiliary reference lineAnd drawing a second auxiliary reference line by translating the second reference line L.)

1. A datum line construction method of a straight main plate in ship construction is characterized by comprising the following steps:

s10, welding a main board in a sectional construction stage;

s20, drawing a first insulation reference line by taking the margin-free edge of the main board as a reference, wherein the distance between the first insulation reference line and the margin-free edge of the main board is a preset value, and the first insulation reference line extends from the first end of the main board to the second end of the main board;

s30, determining a first point and a second point on the first absolute reference line, wherein the distance between the first point and the first end of the main board is the preset value, and the distance between the first point and the second point is b;

s40, making an arc on the main board by taking the first point as the center of a circle and a as the radius, making an arc by taking the second point as the center of a circle and c as the radius, and intersecting the two arcs at the third point, wherein a²+b²＝c²；

S50, drawing a second absolute reference line on the main board, wherein the second absolute reference line passes through the first point and the third point, and the second absolute reference line extends from the third end of the main board to the fourth end of the main board;

and S60, drawing a first auxiliary reference line by the first absolute reference line translation L1, and drawing a second auxiliary reference line by the second reference line translation L, wherein L and L1 are respectively added with a dispersion extension amount on the basis of corresponding theoretical values.

2. The datum line construction method of a straight main plate in ship construction according to claim 1, further comprising the steps of, before step S10:

s09, processing a plurality of cell boards according to the size determined in the design stage;

step S10 specifically includes:

and splicing and welding and fixing the unit plates to form the main plate.

3. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein the step S20 is embodied as:

and making a ground sample line intersection point on the main board, wherein the distance between the ground sample line intersection point and the margin-free edge of the main board is the preset value, drawing the first insulation reference line parallel to the margin-free edge of the main board by using a bevel protractor, and extending the first insulation reference line from the first end of the main board to the second end of the main board.

4. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein the value of b in the step S30 is L1.

5. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein the value of a in step S40 is L.

6. The datum line construction method of a straight main plate in ship construction according to claim 1, further comprising the steps between the step S40 and the step S50 of:

s41, checking the actual distance between the first point and the second point, if the actual distance is equal to the value a, executing the step S50, otherwise returning to the step S40.

7. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein the main plate generates welding shrinkage when welding exterior members, and the dispersed elongation of the L1 includes a component of the welding shrinkage value of the main plate in the direction of the first absolute datum line in step S60.

8. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein welding shrinkage occurs when the main plate is welded to the exterior member, and the discrete elongation of L includes a component of the welding shrinkage value of the main plate in a direction of the second absolute datum line in step S60.

9. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein the main plate is any one of a deck, an inner bottom plate, an outer bottom plate, and an outer plate of a side section of a ship body, and the preset value is any one of 100mm, 150mm, and 200 mm.

10. The datum line construction method of a straight main plate in ship construction according to claim 1, wherein the no-margin side of the main plate in the block other than the block of the bow and its segment is at one end near the bow in the ship length direction, and the no-margin side of the main plate is at the upper end of the main plate in the ship height direction.

Technical Field

The invention relates to a datum line construction method of a straight main plate in ship construction.

Background

In the existing ship construction, the reference marking of a straight main plate affects the precision of the assembly, the segmentation and the block related to the straight main plate, wherein the marking of a reference line on the main plate is particularly important, and in the segmentation construction, the block construction and the outfitting stage, the reference line on the main plate is used as a reference for installing other components of a ship body and is also used as a reference for carrying, so that a main plate marking method capable of ensuring the ship body construction precision is needed.

Disclosure of Invention

The invention provides a datum line construction method of a straight main plate in ship construction, which is beneficial to ensuring the construction precision of a ship body.

The invention solves the technical problems through the following technical scheme:

a datum line construction method of a straight main plate in ship construction comprises the following steps:

s10, welding a main board in a sectional construction stage;

s20, drawing a first insulation reference line by taking the margin-free edge of the main board as a reference, wherein the distance between the first insulation reference line and the margin-free edge of the main board is a preset value, and the first insulation reference line extends from the first end of the main board to the second end of the main board;

s30, determining a first point and a second point on the first absolute reference line, wherein the distance between the first point and the first end of the main board is the preset value, and the distance between the first point and the second point is b;

s40, making an arc on the main board by taking the first point as the center of a circle and a as the radius, making an arc by taking the second point as the center of a circle and c as the radius, and intersecting the two arcs at the third point, wherein a²+b²＝c²；

S50, drawing a second absolute reference line on the main board, wherein the second absolute reference line passes through the first point and the third point, and the second absolute reference line extends from the third end of the main board to the fourth end of the main board;

and S60, drawing a first auxiliary reference line by the first absolute reference line translation L1, and drawing a second auxiliary reference line by the second reference line translation L, wherein L and L1 are respectively added with a dispersion extension amount on the basis of corresponding theoretical values.

Preferably, the following steps are further included before step S10:

s09, processing a plurality of cell boards according to the size determined in the design stage;

step S10 specifically includes:

and splicing and welding and fixing the unit plates to form the main plate.

Preferably, step S20 is specifically:

and making a ground sample line intersection point on the main board, wherein the distance between the ground sample line intersection point and the margin-free edge of the main board is the preset value, drawing the first insulation reference line parallel to the margin-free edge of the main board by using a bevel protractor, and extending the first insulation reference line from the first end of the main board to the second end of the main board.

Preferably, the b value in step S30 is L1.

Preferably, the value of a in step S40 is L.

Preferably, the following steps are further included between step S40 and step S50:

s41, checking the actual distance between the first point and the second point, if the actual distance is equal to the value a, executing the step S50, otherwise returning to the step S40.

Preferably, the main plate generates welding shrinkage when welding the exterior member, and the discrete extension amount of L1 includes a component of the welding shrinkage value of the main plate in the direction of the first insulation reference line in step S60.

Preferably, the main plate generates welding shrinkage when welding the external member, and the discrete extension amount of L includes a component of the welding shrinkage value of the main plate in the direction of the second absolute reference line in step S60.

Preferably, the main board is any one of a deck, an inner bottom board, an outer bottom board and an outer board of a side section of the ship body, and the preset value is any one of 100mm, 150mm and 200 mm.

Preferably, the margin-free edge of the main plate in the sections and blocks other than the bow section is at an end near the bow in the ship length direction, and the margin-free edge of the main plate is at an upper end of the main plate in the ship height direction.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

the invention provides a straight main board marking method which can ensure the precision of an absolute datum line, an auxiliary datum line and a main board and is beneficial to improving the building precision of a ship body.

Drawings

Fig. 1 is a schematic view of a main board after being tailor welded according to an embodiment of the present invention.

Fig. 2 is a main board after a first insulation reference line is scribed in an embodiment of the invention.

Fig. 3 is a main board after determining a first point and a second point according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a motherboard according to an embodiment of the invention.

Fig. 5 is a main board after a first auxiliary reference line and a second auxiliary reference line are scribed according to still another embodiment of the invention.

Description of reference numerals:

unit board 1

Main board 2

First end 21

Second end 22

Third end 23

Fourth end 24

First absolute reference line 31

Second absolute reference line 32

The first auxiliary reference line 33

The second auxiliary reference line 34

First point 4

Second point 5

Third point 6

Detailed Description

The present invention is further illustrated by the following examples, but is not limited thereby in the scope of the examples described below.

Please refer to fig. 1-5 for understanding. The embodiment of the invention provides a datum line construction method of a straight main board 2 in ship construction, which is applied to the ship construction, and the datum line construction method of the main board 2 comprises the following steps:

s09, processing a plurality of cell boards 1 according to the size determined in the design stage;

s10, as shown in figure 1, welding the main board 2 in the stage of sectional construction; that is, when building a section of a ship, the unit panels 1 are joined together and welded to form the main panel 2. The main board 2 is any one of a deck, an inner bottom board, an outer bottom board and an outer board of a side section of a ship body.

S20, as shown in fig. 2, the first insulation reference line 31 is drawn based on the margin-free edge of the main board 2, the margin-free edge of the main board 2 in the block and the block other than the bow block is at the end near the bow, and the margin-free edge of the main board 2 is at the upper end of the main board 2 in the direction of the ship height; in a specific operation, two ground sample lines are marked on the main board 2, and a ground sample line intersection point is formed, and the distance from the ground sample line intersection point to the margin-free edge of the main board 2 is a preset value, and the preset value is any one of 100mm, 150mm and 200 mm. The open angle ruler is used for drawing a first insulation reference line 31 parallel to the margin-free edge of the main board 2, the distance between the first insulation reference line 31 and the margin-free edge of the main board 2 is a preset value, and the first insulation reference line 31 extends from the first end 21 of the main board 2 to the second end 22 of the main board 2. Wherein, the intersection point of the ground sample lines can be arranged on the edge of the first end 21 of the main board 2, which is convenient for operation;

s30, as shown in fig. 3, determining a first point 4 and a second point 5 on the first absolute reference line 31, where the distance from the first point 4 to the first end 21 of the motherboard 2 is a preset value, and the distance from the first point 4 to the second point 5 is b; in this embodiment, the value b is L1, and in other embodiments, the value b may be any value as long as the second point 5 is on the motherboard 2.

S40, as shown in fig. 4, making an arc on the motherboard 2 with the first point 4 as the center, a as the radius, making an arc with the second point 5 as the center, c as the radius, and the two arcs intersecting at the third point 6, wherein a²+b²＝c²(ii) a In this embodiment, the value a is L, and in other embodiments, the value a may be other values.

And S41, checking the actual distance between the first point 4 and the second point 5, executing the step S50 if the actual distance is equal to the value a, and returning to the step S40 if the actual distance is not equal to the value a.

S50, a second absolute reference line 32 is drawn on the main board 2 at the first point 4 and the third point 6, the second absolute reference line 32 extending from the third end 23 of the main board 2 to the fourth end 24 of the main board 2.

S60, as shown in fig. 5, the first reference line 31 is translated by L1 to define the first auxiliary reference line 33, and the second reference line translation L defines the second auxiliary reference line 34, wherein L and L1 each have a dispersion elongation added to the corresponding theoretical value. Welding shrinkage is generated when the main plate 2 is welded with an external component, the external component is a component which is generated in the hull manufacturing process and has a welding relation with the main plate 2, the external component is installed on the main plate 2 in at least one stage of a segmental construction stage, a total segmental construction section and an outfitting stage of a ship, the welding shrinkage generated by welding the main plate 2 and the external component is considered in advance, allowance flows out in advance, and the welding shrinkage value is obtained by calculating the existing welding shrinkage specification; in this step, the dispersion elongation of L1 includes a component of the welding shrinkage value of the main board 2 in the direction of the first absolute reference line 31, and the dispersion elongation of L includes a component of the welding shrinkage value of the main board 2 in the direction of the second absolute reference line 32.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.