A marking method for trumpet-shaped outer plate of a well enclosure

Abstract

The present invention relates to the field of shipbuilding technology, and in particular to a marking method for a trumpet-shaped outer plate for a well. The method comprises: preparing an arc-shaped sample card; marking a cross reference line at the lower end of the outer plate; concentrically arranging the sample card at the lower end of the outer plate so that the outer edge of the sample card fits in with the inner side surface of the lower end of the outer plate; marking corresponding marking line segments on the inner side surface of the lower end of the outer plate in sequence according to the angle bisector; placing a level gauge in the lower end of the outer plate and aligning it with the center point of the cross reference line and then leveling it, the level gauge projects a vertical light onto the inner side surface of the outer plate; rotating the level gauge so that the vertical light coincides with a plurality of marking line segments in sequence, and marking all assembly lines in sequence on the inner side surface of the outer plate along the vertical light at different positions. By using the sample card, the position of the assembly line can be accurately marked, and the level gauge can simultaneously draw the trajectory of the entire assembly line, thereby improving the marking accuracy and efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, and in particular to a marking method for a trumpet-shaped outer plate of a well enclosure. Background Art

[0002] During the shipbuilding process, the fan shaft is generally trumpet-shaped. The outer plate of the shaft is made of multiple plates processed and spliced ​​in a cradle. Multiple vertical ribs need to be installed on the inner surface of the outer plate to enhance the structural strength.

[0003] Currently, after the outer plate is laid on the frame, the assembly line of the vertical frame needs to be marked on its inner surface. There are generally two existing marking methods. One of them is to lead the cross reference line of the frame to the upper, middle and lower parts of the outer plate, and use a tape measure to measure the arc length data of the preset assembly line based on the cross reference line. Since the rigid tape measure cannot completely fit the inner arc surface of the outer plate, the measurement error is relatively large. Another method is to set up a laser theodolite at the center point of the frame, and after centering and leveling, mark the laser point to several positions in the upper, middle and lower parts of the outer plate according to the set angle between the vertical frame and the reference plane to obtain multiple collinear points. Connect the multiple points to obtain the assembly line of the frame, and then rotate the laser theodolite to repeat the above operation to mark out the remaining assembly lines in turn. Since the diameter of the lower end of the outer plate (the small end of the outer plate) is relatively small, generally about 1.4 meters in diameter, the internal space at the lower end is narrow. The laser theodolite occupies a large area and can only mark one point at a time. It also requires two people to cooperate in marking, making the marking process cumbersome, time-consuming, and inefficient.

[0004] Therefore, a marking method for the trumpet-shaped outer plate of the well enclosure is urgently needed to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a marking method for a trumpet-shaped outer plate of a well enclosure, so as to improve the marking efficiency and marking accuracy.

[0006] To achieve this object, the technical solution adopted in the present invention is:

[0007] A marking method for a trumpet-shaped outer plate for a well enclosure is used to mark an assembly line of vertical aggregates on the inner side of the outer plate. The marking method for the trumpet-shaped outer plate for a well enclosure comprises:

[0008] Prepare an arc-shaped sample card, the outer diameter of the sample card is equal to the inner diameter of the lower port of the outer plate, and the end surface of the sample card is provided with a plurality of angle bisectors along its circumference that are consistent with the distribution position of the assembly line;

[0009] Mark a cross reference line at the lower end of the outer plate;

[0010] The sample card is concentrically arranged on the lower end of the outer plate so that the outer edge of the sample card is aligned with the inner side surface of the lower end of the outer plate; corresponding marking line segments are drawn on the inner side surface of the lower end of the outer plate according to the angle bisectors;

[0011] Place a level gauge in the lower port of the outer plate and align it with the center point of the cross reference line and then level it, so that the level gauge projects a vertical light onto the inner side of the outer plate;

[0012] The projection level is rotated so that the vertical light rays coincide with the plurality of marking line segments in sequence, and all the assembly lines are marked out in sequence on the inner side surface of the outer panel along the vertical light rays at different positions.

[0013] As a preferred solution, the outer plate is located in a tire frame that forms the outer plate, and the quality of the tire frame and the outer plate is tested in sequence.

[0014] As a preferred solution, before marking the cross reference line, it is checked whether the outer plate is attached to the inner side of the tire frame to ensure that the outer plate is qualified for attachment to the tire.

[0015] As a preferred solution, a horizontal template in the shape of a circular ring extends inward from the lower end of the tire frame, and the lower end of the outer plate is placed on the horizontal template; the sample card is placed on the horizontal template so that the sample card is concentric with the lower end of the outer plate.

[0016] As a preferred solution, the central angle of the sample card is 90°, and the sample card is rotated multiple times around the center point of the cross reference line on the horizontal template to mark all the marking line segments on the inner side of the outer plate.

[0017] As a preferred solution, the sample card is rotated three times on the horizontal template and each time is rotated 90°.

[0018] As a preferred solution, a hanging hammer is hung inside the outer plate, and the cross reference line is marked by the hanging hammer.

[0019] As a preferred solution, two cross-shaped steel wires on the wire drawing frame are arranged above the outer plate, and the intersection of the two steel wires is opposite to the center point of the cross reference line, and the pendulum is suspended at the intersection through the suspension wire.

[0020] As a preferred solution, the line level emits a laser point vertically downward, and adjusts the landing point of the laser point to the center point of the cross reference line to complete the centering of the line level.

[0021] As a preferred solution, the cross reference line, the marking line segment and the assembly line are all marked with a marking pen.

[0022] The beneficial effects of the present invention are:

[0023] The present invention proposes a method for marking a trumpet-shaped outer plate for a well. First, a sample card is prepared, and then a cross reference line is marked on the lower end of the outer plate. Corresponding marked line segments are sequentially marked on the inner side surface of the lower end of the outer plate using the sample card's angular bisectors. Finally, a line level is aligned with the center point of the cross reference line and leveled. The line level projects a vertical light onto the inner side surface of the outer plate. The trajectory of this vertical light is the corresponding assembly line. By rotating the line level, the vertical light is sequentially aligned with multiple marked line segments, and finally, all assembly lines are sequentially marked on the inner side surface of the outer plate. By using the sample card, the location of the assembly line can be accurately marked, eliminating the need to manually measure the arc length of the assembly line one by one using a tape measure. Furthermore, compared to existing laser theodolites, which can only mark one point at a time, the line level used in the present invention can mark the trajectory of the entire assembly line in a single step, which is more convenient and quick. The combined use of the sample card and the line level improves the marking accuracy and efficiency of the assembly line. In addition, the line level is smaller in size and occupies a smaller area, which allows for flexible operation within the lower port of the outer plate, thereby improving the convenience and efficiency of marking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of an outer plate provided by an embodiment of the present invention;

[0025] Figure 2 is a front view of a tire frame provided by an embodiment of the present invention;

[0026] Figure 3 This is a main flow chart of a marking method for a trumpet-shaped outer plate of a well enclosure provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of a sample card provided by an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure in which the sample provided by the embodiment of the present invention is placed inside the outer panel;

[0029] Figure 6 It is a structural schematic diagram of a line level provided by an embodiment of the present invention placed inside an outer plate.

[0030] The names and numbers of the components in the figure are as follows:

[0031] 1. Outer plate; 10. Plate; 11. Marking line segment; 2. Cradle; 21. Bracket; 22. Horizontal template; 3. Sample card; 31. Angle bisector; 4. Level; 41. Vertical light; 42. Horizontal light. DETAILED DESCRIPTION

[0032] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0037] like Figure 1 and Figure 2 As shown, during the ship construction process, the fan enclosure is generally trumpet-shaped, and the outer plate 1 of the enclosure is made of multiple plates 10 processed and spliced ​​in the tire frame 2, and the inner surface of the outer plate 1 needs to be installed with multiple vertical ribs to enhance its structural strength.

[0038] At present, after the outer plate 1 is laid on the tire frame 2, it is necessary to survey and mark the assembly line of the vertical frame on its inner surface. There are generally two existing marking methods. One is to manually measure the curvature of the assembly line with a tape measure. Since the rigid tape measure cannot completely fit the inner arc surface of the outer plate 1, the measurement error is large, which is not only inefficient but also reduces the marking accuracy. Another method is to set up a laser theodolite at the center point of the tire frame 2, mark the laser point to several positions of the outer plate 1, obtain multiple collinear points, connect the multiple points to obtain one of the assembly lines, and then rotate the laser theodolite to repeat the above operation to mark all the assembly lines in turn. Since the diameter of the lower end of the outer plate 1 is small, the internal space of its lower end is small, and the laser theodolite occupies a large area and can only mark one point at a time, making the entire marking process cumbersome, time-consuming, and inefficient.

[0039] In order to solve the above problems, Figures 3 to 6 As shown, this embodiment proposes a marking method for a trumpet-shaped outer plate for a well, which is used to mark the assembly line of vertical aggregates on the inner side of the outer plate 1. Specifically, the marking method for the trumpet-shaped outer plate for a well includes:

[0040] Prepare an arc-shaped sample card 3, the outer diameter of which is equal to the inner diameter of the lower end of the outer plate 1, and the end surface of the sample card 3 is provided with a plurality of angle bisectors 31 along its circumference, which are consistent with the distribution position of the assembly line;

[0041] Draw a cross reference line at the lower end of outer plate 1;

[0042] Place the sample card 3 concentrically on the lower end of the outer plate 1 so that the outer edge of the sample card 3 is aligned with the inner side of the lower end of the outer plate 1; mark corresponding marking line segments 11 on the inner side of the lower end of the outer plate 1 according to the angle bisector 31;

[0043] Place the level 4 in the lower port of the outer plate 1 and align it with the center point of the cross reference line and then level it. The level 4 projects a vertical light 41 onto the inner side of the outer plate 1.

[0044] The projection level 4 is rotated so that the vertical light 41 coincides with the plurality of marking line segments 11 in sequence, and all assembly lines are marked out in sequence on the inner side surface of the outer panel 1 along the vertical light 41 at different positions.

[0045] The marking method for the trumpet-shaped outer plate of the enclosure can accurately mark the location of the assembly line by using the sample card 3, eliminating the need to manually measure the arc length of the assembly line one by one with a tape measure. At the same time, compared to the existing laser theodolite, which can only mark a single point at a time, the line level 4 of this embodiment can mark the trajectory of the entire assembly line at a time, which is more convenient and quick. The combined use of the sample card 3 and the line level 4 improves the marking accuracy and efficiency of the assembly line. In addition, the line level 4 is relatively small in size and has a smaller footprint, which facilitates flexible operation within the lower end of the outer plate 1, improving the convenience and efficiency of marking.

[0046] In this embodiment, the cross reference line, marking line segment 11, and assembly line are all marked with a marker pen. The marker pen is lightweight and easy to use, while clearly marking the assembly line. Furthermore, the marker pen does not damage the inner surface of the outer panel 1, thus improving the protection of the outer panel 1.

[0047] It should be noted that the tire frame 2 of this embodiment is welded with a bracket 21 on its exterior. This bracket 21 secures the tire frame 2 to the ground or workstation, enhancing its stability. The tire frame 2 matches the structure of the outer panel 1, also possessing a trumpet shape. A circular horizontal template 22 extends inward from the lower end of the tire frame 2. The lower end of the outer panel 1 rests on this template 22, providing stable support for the outer panel 1.

[0048] When multiple plates 10 are welded together to form a trumpet-shaped outer panel 1, there is no need to move the position of the outer panel 1, so that the outer panel 1 is located in the tire frame 2 that forms the outer panel 1, and the quality of the tire frame 2 and the outer panel 1 is inspected in turn. Since there is no need to move the position of the outer panel 1, and the outer panel 1 can be stably placed by the tire frame 2, it is beneficial to improve the marking efficiency and marking accuracy. Before being spliced ​​into the outer panel 1, it is necessary to inspect whether the quality of the tire frame 2 meets the assembly and marking requirements of the outer panel 1, mainly inspecting the arc of the inner side of the tire frame 2 and the size of the tire frame 2 and other parameters. After being spliced ​​into the outer panel 1, the quality inspection of the outer panel 1 continues to be carried out to ensure that the size, structural strength and other parameters of the outer panel 1 meet the production requirements. The specific inspection parameters of the tire frame 2 and the outer panel 1 can be flexibly adjusted according to the actual working conditions. Since the inspection process of the tire frame 2 and the outer panel 1 is an existing technology, it will not be repeated here.

[0049] Furthermore, before marking the cross reference line, the outer plate 1 is inspected for conformity to the inner surface of the tire frame 2 to ensure that the outer plate 1 has passed the tire application. If the outer plate 1 fails to adhere to the tire, a gap exists between a certain area of ​​the outer plate 1 and the inner surface of the tire frame 2, causing the outer plate 1 to be offset relative to the tire frame 2, affecting the marking accuracy and quality. The outer plate 1 tire application inspection process is conventional and will not be further described here.

[0050] Furthermore, a hanging hammer is suspended within the outer plate 1, and a cross datum line is drawn with the hammer. The hanging hammer allows for precise and rapid drawing of the cross datum line. The hanging hammer is suspended at the center of the outer plate 1, with its axis aligned with the axis of the outer plate 1. The freely hanging hammer tip is lowered to the plane of the lower end of the outer plate 1. The point where the hammer tip is located is the center point of the lower end of the outer plate 1, and the cross datum line is drawn through this center point.

[0051] Specifically, two cross-shaped steel wires on the tensioning frame are arranged above the outer plate 1, and the intersection of the two steel wires is directly opposite the center point of the cross reference line, and the pendulum is suspended at the intersection through the pendulum. The length of the pendulum wire in this embodiment can be extended or shortened according to demand to flexibly adjust the height of the pendulum.

[0052] It should be noted that the width of the horizontal template 22 along its radial direction is greater than the thickness of the outer plate 1, so as to facilitate the placement of the sample card 3. By placing the sample card 3 on the horizontal template 22, the sample card 3 is concentric with the lower end of the outer plate 1.

[0053] like Figure 4 and Figure 5 As shown, the central angle of the sample card 3 is 90°. The sample card 3 is rotated multiple times around the center point of the cross reference line on the horizontal template 22 to mark all the marking line segments 11 on the inner side of the outer panel 1. Compared to making the sample card 3 into a circular ring structure, this embodiment makes the sample card 3 into an arc-shaped plate with a central angle of 90°. This reduces the size and weight of the sample card 3, facilitates the preparation and handling of the sample card 3, and improves marking efficiency. Of course, the central angle of the sample card 3 can also be other angles, which are not specifically limited here.

[0054] When the sample card 3 is placed on the horizontal template 22, the outer edge of the sample card 3 is aligned with the inner side of the lower end of the outer panel 1. The sample card 3 is rotated three times on the horizontal template 22, each time by 90°. Specifically, when the sample card 3 is first placed on the horizontal template 22, the position of the sample card 3 is adjusted so that the outer edge of the sample card 3 is aligned with the inner side of the lower end of the outer panel 1. Then, using a marker, a plurality of marked line segments 11 are marked on the inner side of the lower end of the outer panel 1, corresponding to the multiple angle bisectors 31 on the sample card 3. Each marked line segment 11 is collinear with the corresponding angle bisector 31. The sample card 3 is then rotated three times in the same direction, each time by 90°. After each 90° rotation of the sample card 3, the marking operation of the marked line segments 11 is repeated until all marked line segments 11 are marked on the inner side of the lower end of the outer panel 1.

[0055] Furthermore, the marking level 4 emits a laser spot vertically downward and adjusts the landing point of the laser spot to the center of the cross reference line to complete the centering of the marking level 4. After centering, the marking level 4 needs to be leveled to meet the requirements of the marking level 4 and improve the marking accuracy. Since the structure, operation process, and centering and leveling operation of the marking level 4 are all existing technologies, they will not be described in detail here.

[0056] like Figure 6 As shown, the level 4 can project a laser point downward for centering. It can also simultaneously emit a vertical beam 41 and a horizontal beam 42, projecting each onto the inner side of the outer panel 1. When the vertical beam 41 coincides with one of the marked line segments 11, the trajectory of the vertical beam 41 represents one of the assembly lines. While maintaining the level 4's centering, the projected vertical beam 41 can be aligned with different marked line segments 11 by rotating the level 4 in the same direction. Finally, all assembly lines can be marked with a marker.

[0057] The line level 4 of this embodiment is a mature product that can be purchased from outside. Since the line level 4 occupies a small area and is light and easy to carry, the accuracy of use within a short to medium distance is ≤1mm, which meets the marking requirements of the assembly line.

[0058] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A marking method for a trumpet-shaped outer plate of a well enclosure, characterized in that: The method for marking the assembly line of the vertical aggregate on the inner side of the outer plate (1) comprises: A circular arc-shaped sample card (3) is prepared, wherein the outer diameter of the sample card (3) is equal to the inner diameter of the lower end of the outer plate (1), and the end surface of the sample card (3) is provided with a plurality of angle bisectors (31) along its circumference that are consistent with the distribution position of the assembly line; A cross reference line is drawn on the lower end of the outer plate (1); The sample card (3) is concentrically arranged on the lower end of the outer plate (1) so that the outer edge of the sample card (3) is in contact with the inner side surface of the lower end of the outer plate (1); corresponding marking line segments (11) are drawn on the inner side surface of the lower end of the outer plate (1) in sequence according to the angle bisector (31); A projection level (4) is placed in the lower port of the outer plate (1) and aligned with the center point of the cross reference line and then leveled, wherein the projection level (4) projects a vertical light (41) onto the inner side surface of the outer plate (1); The projection level (4) is rotated so that the vertical light (41) coincides with the plurality of marking line segments (11) in sequence, and all the assembly lines are marked in sequence on the inner side surface of the outer panel (1) along the vertical light (41) at different positions.

2. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 1, characterized in that: The outer plate (1) is located in a tire frame (2) that forms the outer plate (1), and the quality of the tire frame (2) and the outer plate (1) are detected in sequence.

3. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 2, characterized in that: Before marking the cross reference line, it is detected whether the outer plate (1) is attached to the inner side of the tire frame (2) to ensure that the outer plate (1) is properly attached to the tire.

4. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 2, characterized in that: A circular horizontal template (21) extends inward from the lower end of the tire frame (2), and the lower end of the outer plate (1) is placed on the horizontal template (21); the sample card (3) is placed on the horizontal template (21) so that the sample card (3) is concentric with the lower end of the outer plate (1).

5. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 4, characterized in that: The central angle of the sample card (3) is 90°, and the sample card (3) is rotated multiple times on the horizontal template (21) around the center point of the cross reference line to mark all the marking line segments (11) on the inner side of the outer plate (1).

6. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 5, characterized in that: The sample card (3) is rotated three times on the horizontal template (21) and each time is rotated 90 degrees.

7. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 1, characterized in that: A hanging hammer is hung inside the outer plate (1), and the cross reference line is marked by the hanging hammer.

8. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 7, characterized in that: Two cross-shaped steel wires on the wire drawing frame are arranged above the outer plate (1), and the intersection of the two steel wires is opposite to the center point of the cross reference line, and the pendulum is suspended at the intersection through the pendulum.

9. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 1, characterized in that: The line level (4) emits a laser point vertically downward, and adjusts the landing point of the laser point to the center point of the cross reference line to complete the centering of the line level (4).

10. The marking method for the trumpet-shaped outer plate of a well enclosure according to claim 1, characterized in that: The cross reference line, the marking line segment (11) and the assembly line are all marked with a marking pen.

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