Plate edge flatness measuring tool and measuring method

Abstract

The invention discloses a plate edge flatness measuring tool and a plate edge flatness measuring method in the technical field of ship construction. The tool comprises a long-strip-shaped ruler, the ruler is provided with a magnet set which enables the ruler to be attracted and fixed to the bottom of the segmented plate, and the attraction positions of the magnet set are located at the positions of two adjacent longitudinal bones on the segmented plate. The magnet group comprises a first magnet and a second magnet which have the same height, and the top surfaces of the first magnet and the second magnet are coplanar and horizontal; the first magnet is fixed to one end of the ruler, and the other end of the ruler is located on the edge of the segmentation plate. The second magnet is arranged in the middle of the ruler and can horizontally move in the length direction of the ruler; the ruler is provided with an adjusting assembly, and the adjusting assembly is used for driving the second magnet to move and locking the second magnet on the ruler. The method has the advantage that the efficiency and the measurement accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a plate edge flatness measuring tool and a measuring method. Background Art

[0002] In shipbuilding, the flatness of the edge of a section plate is directly related to the accuracy of hull assembly and welding quality, and is a key indicator for controlling overall structural stress. Traditional inspection methods commonly use manual wire drawing, where steel or nylon wire is stretched tight around the edge of the section plate. Flatness is assessed visually or by measuring the gap between the plate edge and the wire with a feeler gauge. This method has the following drawbacks: It is extremely inefficient, requiring multiple people to collaborate on wire drawing, tightening, securing, and point-by-point measurement, with a single measurement taking upwards of 30 minutes. Furthermore, the wire drawing is susceptible to environmental vibrations, wind, and operator force, resulting in fluctuating and poorly repeatable measurement results. Summary of the Invention

[0003] The object of the present invention is to provide a plate edge flatness measuring tool and a measuring method which can improve efficiency and measurement accuracy.

[0004] In order to achieve the above-mentioned purpose of the invention, the plate edge flatness measuring tool and measuring method of the present invention adopt the following technical solutions:

[0005] A tool for measuring the flatness of plate edges comprises a long strip-shaped ruler provided with a magnet group for attracting and fixing the ruler to the bottom of a segmented plate, wherein the attraction position of the magnet group is located at two adjacent longitudinal bones on the segmented plate; the magnet group comprises a first magnet and a second magnet of the same height, the top surfaces of the two magnets being coplanar and kept horizontal; the first magnet is fixed to one end of the ruler, and the other end of the ruler is located at the edge of the segmented plate; the second magnet is arranged in the middle of the ruler, and the second magnet can move horizontally along the length direction of the ruler; the ruler is provided with an adjustment component, which is used to drive the second magnet to move and to lock the second magnet to the ruler.

[0006] Preferably, the adjustment assembly includes an adjustment bolt mounted on the second magnet, a strip-shaped hole disposed in the middle of the ruler, the strip-shaped hole being arranged in an elongated strip along the length of the ruler, the adjustment bolt being inserted into the strip-shaped hole, one end of the adjustment bolt being passed through the strip-shaped hole and then tightened by an adjustment nut. The second magnet provided in the present invention is adjustable and can accommodate different longitudinal rib spacings. During adjustment, the second magnet can be quickly positioned and tightened simply by combining the adjustment bolt and the adjustment nut, resulting in convenient operation and practicality.

[0007] Preferably, the first magnet is fixedly connected to the ruler via a fastener, and the fastener comprises a fixing bolt provided on the first magnet, and the fixing bolt passes through the ruler and is then locked by a fixing nut.

[0008] Preferably, the first magnet is attracted to one longitudinal bone of the segmented plate, and the second magnet is attracted to another adjacent longitudinal bone of the segmented plate. The first and second magnets are respectively attracted to adjacent longitudinal bones, utilizing the deformation resistance of the longitudinal bones to ensure that the ruler does not twist or warp during measurement.

[0009] Preferably, the ruler has a first scale mark corresponding to the position of the first magnet, which serves as the starting point for measurement and has a scale value of 0 mm. A second scale mark is provided in the middle of the ruler, corresponding to the position of the elongated hole, and has a scale value range of 600 mm to 900 mm. The provision of the first and second scale marks facilitates adjustment of the position of the second magnet according to the actual longitudinal rib spacing.

[0010] A measuring method based on a plate edge flatness measuring tool comprises the following steps:

[0011] (1) Measure the actual distance between the two longitudinal bones on the segmented plate;

[0012] (2) Adjust the position of the second magnet to the corresponding second scale mark according to the actual distance measured;

[0013] (3) The ruler is fixed to the segmented plate by a magnet group, wherein the first magnet is fixed to one longitudinal bone of the segmented plate, and the second magnet is fixed to another adjacent longitudinal bone of the segmented plate;

[0014] (4) Measure the vertical distance H between the bottom surface of the segmented plate edge and the top surface of the ruler, and at the same time measure the height difference h between the top surface of the first magnet and the top surface of the ruler to obtain the deviation value L of the plate edge flatness, L = Hh.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention adopts a rigid combination structure of a magnet group and a ruler, and fixes the ruler on the segmented plate through the magnet group. It can be completed by a single person, which greatly shortens the measurement time and improves efficiency.

[0017] 2. The top surfaces of the first magnet and the second magnet of the present invention are coplanar and horizontal, forming a stable rigid measurement reference surface, which completely eliminates the unstable factors of the wire-pulling method used in the prior art; and the longitudinal bone structure is used to fix the tooling to avoid reference offset during measurement, and the position of the second magnet is adjusted in combination with the longitudinal bone spacing to eliminate the system error introduced by the size difference of the segmented plate, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram showing the use of the tooling of the present invention;

[0019] Figure 2 for Figure 1A magnified view of part A;

[0020] Figure 3 It is a structural schematic diagram of the present invention;

[0021] Figure 4 for Figure 3 A magnified view of part B;

[0022] Figure 5 for Figure 3 Magnified view of part C;

[0023] Figure 6 for Figure 3 A top view of

[0024] Figure 7 for Figure 6 DD cross-section diagram.

[0025] Among them, 1 is a ruler, 2 is a first magnet, 3 is a longitudinal bone, 4 is a segmented plate, 5 is a second magnet, 6 is a first scale mark, 7 is a second scale mark, 8 is a bar hole, 9 is a fixing bolt, 10 is a fixing nut, 11 is an adjusting bolt, and 12 is an adjusting nut. DETAILED DESCRIPTION

[0026] The present invention will be further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0027] like Figures 1-7As shown, a plate edge flatness measuring tool comprises a long strip-shaped ruler 1, the ruler 1 is provided with a magnet group for attracting and fixing it to the bottom of the segmented plate 4, and the attraction position of the magnet group is located at two adjacent longitudinal bones 3 on the segmented plate 4; the magnet group comprises a first magnet 2 and a second magnet 5 of the same height, the top surfaces of the two are coplanar and kept horizontal; the first magnet 2 is attracted to the position of one of the longitudinal bones 3 of the segmented plate 4, and the second magnet 5 is attracted to the position of the other longitudinal bone 3 adjacent to the segmented plate 4; the first magnet 2 is fixed to one end of the ruler 1, and the first magnet 2 is fixedly connected to the ruler 1 by a fastener, and the fastener comprises a fixing bolt 9 arranged on the first magnet 2, and the fixing bolt 9 passes through the ruler 1 and is locked by a fixing nut 10, and the other end of the ruler 1 is located at the edge of the segmented plate 4; the second magnet 5 is arranged in the middle of the ruler 1, and the second magnet 5 is arranged in the middle of the ruler 1. It can move horizontally along the length of the ruler 1; the ruler 1 is provided with an adjustment assembly, which is used to drive the second magnet 5 to move and to lock the second magnet 5 on the ruler 1; the adjustment assembly includes an adjustment bolt 11 arranged on the second magnet 5, and a strip hole 8 is provided in the middle of the ruler 1. The strip hole 8 is arranged in an elongated shape along the length of the ruler 1. The adjustment bolt 11 is inserted into the strip hole 8, and one end of the adjustment bolt 11 passes through the strip hole 8 and is locked by the adjustment nut 12; the ruler 1 is provided with a first scale mark 6 at the position corresponding to the first magnet 2, which serves as the measurement starting point. The scale value of the first scale mark 6 is 0 mm; a second scale mark 7 is provided at the position corresponding to the elongated hole in the middle of the ruler 1, and the scale value range of the second scale mark 7 is 600 mm to 900 mm, because the conventional longitudinal bone spacing is between 620 mm and 850 mm.

[0028] A measuring method based on a plate edge flatness measuring tool comprises the following steps:

[0029] (1) Measure the actual distance between the two longitudinal bones 3 on the segmented plate 4;

[0030] (2) According to the actual distance measured, adjust the position of the second magnet 5 to the corresponding second scale mark 7;

[0031] (3) The ruler 1 is fixed to the segmented plate 4 by the magnet group, the first magnet 2 is fixed to one of the longitudinal bones 3 of the segmented plate 4 by suction, and the second magnet 5 is fixed to the other longitudinal bone 3 adjacent to the segmented plate 4 by suction;

[0032] (4) Measure the vertical distance H between the bottom surface of the edge of the segmented plate 4 and the top surface of the ruler 1, and at the same time measure the height difference h between the top surface of the first magnet 2 and the top surface of the ruler 1 to obtain the deviation value L of the flatness of the plate edge, L = Hh, as shown in Figures 1-2 shown.

[0033] The specific working process and principle of the present invention are as follows: the segmented plate 4 is placed on the support platform, and then the ruler 1 is adsorbed and fixed to the adjacent longitudinal bones 3 of the segmented plate 4 by the magnet group to form a rigid horizontal reference surface; wherein the first magnet 2 is fixed to one end of the ruler 1, and the second magnet 5 is moved horizontally in the bar-shaped hole 8 in the middle of the ruler 1 by the adjustment bolt 11, and the second magnet 5 is adjusted to the corresponding second scale mark 7 according to the measured spacing between the longitudinal bones 3. At this time, the free end of the ruler 1 is overhung to the edge of the segmented plate 4, and the vertical distance H between the bottom surface of the edge of the segmented plate 4 and the top surface of the ruler 1, as well as the height difference h between the top surface of the first magnet 2 and the top surface of the ruler 1 are simultaneously measured by the depth gauge, and finally the plate edge flatness deviation value L is obtained;

[0034] The design uses the longitudinal rib 3 as the reference anchor point, utilizes the coplanarity of dual magnets to establish a stable measurement plane, and adapts to different longitudinal rib 3 spacings through mechanical adaptive adjustment, providing an efficient and accurate method for flatness detection of ship segment plates 4.

[0035] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0037] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the inventive concept described herein by the teachings above or by techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. A tool for measuring the flatness of a plate edge, characterized by: The invention comprises a long strip-shaped ruler, which is provided with a magnet group for attracting and fixing the ruler to the bottom of a segmented plate, and the attraction position of the magnet group is located at two adjacent longitudinal bones on the segmented plate; the magnet group includes a first magnet and a second magnet of the same height, and the top surfaces of the two magnets are coplanar and kept horizontal; the first magnet is fixed to one end of the ruler, and the other end of the ruler is located at the edge of the segmented plate; the second magnet is arranged in the middle of the ruler, and the second magnet can move horizontally along the length direction of the ruler; the ruler is provided with an adjustment component, which is used to drive the second magnet to move and to lock the second magnet on the ruler.

2. The plate edge flatness measuring tool according to claim 1, characterized in that: The adjustment assembly includes an adjustment bolt arranged on the second magnet, a strip hole is arranged in the middle of the ruler, and the strip hole is arranged in a long strip shape along the length direction of the ruler. The adjustment bolt is inserted into the strip hole, and one end of the adjustment bolt passes through the strip hole and is locked by the adjustment nut.

3. The plate edge flatness measuring tool according to claim 1, characterized in that: The first magnet is fixedly connected to the ruler via a fastener. The fastener comprises a fixing bolt arranged on the first magnet. The fixing bolt passes through the ruler and is locked via a fixing nut.

4. The plate edge flatness measuring tool according to claim 1, characterized in that: The first magnet is attracted to one longitudinal bone position of the segmented plate, and the second magnet is attracted to another adjacent longitudinal bone position of the segmented plate.

5. The plate edge flatness measuring tool according to claim 1, characterized in that: The ruler is provided with a first scale mark corresponding to the position of the first magnet, which serves as the measurement starting point and the scale value of the first scale mark is 0 mm; the middle part of the ruler is provided with a second scale mark corresponding to the position of the long hole, and the scale value range of the second scale mark is 600 mm to 900 mm.

6. A method for measuring plate edge flatness based on the plate edge flatness measuring tool according to any one of claims 1 to 5, characterized in that: The steps include: (1) Measure the actual distance between the two longitudinal bones on the segmented plate; (2) Adjust the position of the second magnet to the corresponding second scale mark according to the actual distance measured; (3) The ruler is fixed to the segmented plate by a magnet group, wherein the first magnet is fixed to one longitudinal bone of the segmented plate, and the second magnet is fixed to another adjacent longitudinal bone of the segmented plate; (4) Measure the vertical distance H between the bottom surface of the segmented plate edge and the top surface of the ruler, and at the same time measure the height difference h between the top surface of the first magnet and the top surface of the ruler to obtain the deviation value L of the plate edge flatness, L = Hh.

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