A method for manufacturing and positioning a spherically flattened steel marking tool

Abstract

This invention discloses a method for manufacturing and positioning a marking tool for bulb flat steel. The tool includes a positioning plate with a limiting groove adapted to the longitudinal section curve of the bulb flat steel and a connecting piece. The positioning plates, arranged side by side, are fixedly connected by the connecting piece. The method includes the following steps: S1, manufacturing the marking tool; S1-1, opening a limiting groove on the positioning plate according to the longitudinal section curve of the bulb flat steel; S1-2, fixing the positioning plate to the connecting piece; S2, using the bulb flat steel marking tool to mark the cutting positioning line: based on the parallelism between the upper edge of the left end face of the bulb flat steel and the longitudinal section of the bulb flat steel, using the upper edge of the left end face of the bulb flat steel as a reference or actively marking as a reference, adjusting the marking tool according to the required cutting length of the bulb flat steel, and marking the cutting positioning line on the bulb flat steel along the lower edge of the outer side of the positioning plate. This invention improves the positioning accuracy of the marking and ensures the cutting accuracy. It can manufacture marking tools suitable for different specifications of bulb flat steel as needed.

Description

Technical Field

[0001] This invention belongs to the field of ship structure technology, and particularly relates to the manufacturing and positioning marking method of a spherical flat steel marking tool. Background Technology

[0002] In the actual construction of modern ships, a large amount of bulb flat steel is required as a structural reinforcement component. As an important material in ship structures, the accuracy and precision of bulb flat steel cutting and marking have a significant impact on the strength and stability of the ship structure. Bulb flat steel is generally classified into single-ended bulb flat steel and double-ended bulb flat steel according to the number of bulb heads.

[0003] Before cutting bulb flats, the given length and allowance need to be marked and cut according to the assembly drawings. Furthermore, before assembling the bulb flats with the splicing plates, assembly reference lines need to be drawn on the bulb flats, 150mm from the cut surface. However, due to the structural characteristics of bulb flats, it is impossible to mark them using the same methods as cutting steel plates, especially for double-ended bulb flats with curvature on both sides, making precise marking even more difficult.

[0004] The current traditional marking method involves workers using a long ruler and a steat pen to mark lines on the bulb flat steel. However, because the ruler and the bulb flat steel cannot be perfectly aligned, some errors will occur. If the final cut surface of the bulb flat steel is asymmetrical, it will warp and bend under vertical loads, leading to a reduction in the strength and stiffness of the connection structure and affecting the stability of the ship structure.

[0005] A Chinese utility model application with publication number CN2011202700611 discloses a profile scribing device. "This profile scribing device includes a main scale, a movable ruler frame mounted on the main scale and movable on the main scale, a movable positioning body, and an auxiliary positioning body; the movable positioning body and the auxiliary positioning body are movably mounted on the main scale, and are located on both sides of the movable ruler frame, forming a bridge-shaped structure between the movable positioning body and the main scale; a scribing needle is movably mounted on the movable ruler frame. This utility model is not only applicable to scribing of profile holes in curtain wall frames and steel structure production, but also applicable to scribing of products in other fields." Although this scribing device can perform scribing while measuring, it cannot fix and measure scribing for components with special curvature structures, such as double-headed bulb flat steel, which is prone to errors and ultimately affects the stability of the connection structure. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a method for manufacturing and positioning marking tools for spherical flat steel. The method of the present invention can effectively improve the marking quality and ensure cutting accuracy. It can be manufactured according to needs and is applicable to spherical flat steel or profile steel of different specifications and shapes. It not only improves the marking accuracy, but also marks the assembly reference line at the same time as marking the cutting positioning line, simplifying the operation steps.

[0007] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0008] This invention provides a method for manufacturing and positioning a marking tool for spherical flat steel, comprising the following steps:

[0009] S1. Make a spherical flat steel marking tool:

[0010] The ball flat steel marking tool includes a positioning plate and a connector; the positioning plate is provided with a limiting groove, the limiting groove having a shape adapted to the longitudinal section curve of the ball flat steel; the positioning plate includes a positioning plate one and a positioning plate two arranged side by side, the positioning plate one and the positioning plate two being fixedly connected by the connector;

[0011] S1-1. Based on the longitudinal section curve of the bulb flat steel, a limiting groove is opened on the positioning plate to complete the production of positioning plate one and positioning plate two.

[0012] S1-2. Fix the positioning plate with connectors to complete the production of the ball flat steel marking tool;

[0013] S2. Using a scribing tool for flat steel, mark the cutting positioning lines:

[0014] If the upper edge of the left end face of the bulb flat steel is parallel to the longitudinal section of the bulb flat steel, take the upper edge of the left end face of the bulb flat steel as a reference, adjust the position of the scribing tool according to the required cutting length of the bulb flat steel, and scribing the cutting positioning line on the upper end face of the bulb flat steel along the lower edge of the outer side of the positioning plate.

[0015] If the upper edge of the left end face of the bulb flat steel is not parallel to the longitudinal section of the bulb flat steel, first place the scribing tool on the upper end face of the bulb flat steel near the left end face to scribing the starting line for cutting. Using the starting line for cutting as a reference, adjust the position of the scribing tool according to the required cutting length of the bulb flat steel, and scribing the cutting positioning line on the upper end face of the bulb flat steel along the lower edge of the outer side of the positioning plate.

[0016] As a preferred technical solution, the specific steps of marking the cutting positioning lines using a spherical flat steel marking tool in step S2 include:

[0017] S2-1. Based on the required cutting length of the bulb flat steel, mark positioning point one and positioning point two on the bulb flat steel;

[0018] S2-2. Place the ball flat steel scribing tool on the ball flat steel so that positioning point one and positioning point two fall simultaneously on the lower edge of the outer side of positioning plate one. Draw a cutting positioning line along the outer edge of the ball flat steel that contacts the ball flat steel scribing tool.

[0019] Furthermore, the specific steps of step S2-1 include:

[0020] If the upper edge of the left end face of the bulb flat steel is parallel to the longitudinal section of the bulb flat steel, then according to the required cutting length of the bulb flat steel, take any two points on the upper edge of the left end face of the bulb flat steel for measurement, and use a stone pencil to mark positioning point one and positioning point two on the upper end face of the bulb flat steel, so that the vertical distance from positioning point one to the left end face of the bulb flat steel and the vertical distance from positioning point two to the front end face of the bulb flat steel are both equal to the cutting length.

[0021] If the upper edge of the left end face of the bulb flat steel is not parallel to the longitudinal section of the bulb flat steel, first place the bulb flat steel scribing tool on the upper end face of the bulb flat steel, and scribing the cutting start line on the upper end face of the bulb flat steel along the outer edge of the left side of the scribing tool. The cutting start line is located on the longitudinal section of the bulb flat steel.

[0022] Then, based on the required cutting length of the bulb flat steel, take any two points on the cutting start line for measurement, and use a stone pencil to mark positioning point one and positioning point two on the upper end face of the bulb flat steel, so that the vertical distance from positioning point one to the cutting start line and the vertical distance from positioning point two to the cutting start line are both equal to the cutting length.

[0023] As a preferred technical solution, in step S1, the length X of the connector is L1-2*L2, where L1 is the distance from the assembly reference line to the cutting surface of the bulb flat steel when assembling the bulb flat steel and the splicing plate, and L2 is the thickness of positioning plate one and positioning plate two.

[0024] Furthermore, the positioning and marking method also includes step S3, marking assembly reference lines using a bulb flat steel marking tool. The specific steps include: while marking the cutting positioning line in step S2, the tip of the steel needle is pressed against the lower edge of the outer side of another positioning plate, thereby marking the assembly reference line on the upper surface of the bulb flat steel.

[0025] As a preferred technical solution, in step S1, the connecting member is a telescopic sleeve rod equipped with fasteners for tight positioning. The telescopic sleeve rod includes an inner rod and an outer rod. The inner rod is provided with a scale. The inner rod moves telescopically within the outer rod. The fasteners pass through the outer rod and abut against the inner rod, so that the second positioning plate can move parallel to the first positioning plate and be fixed by the fasteners.

[0026] As a further preferred technical solution, the specific steps of using a spherical flat steel marking tool to mark the cutting positioning line in step S2 include: adjusting and fixing the distance between positioning plate two and positioning plate one according to the required cutting length of the spherical flat steel, and marking the cutting positioning line:

[0027] If the upper edge of the left end face of the bulb flat steel is parallel to the longitudinal section of the bulb flat steel, place the bulb flat steel scribing tool on the upper end face of the bulb flat steel and align the lower edge of the outer side of the positioning plate with the upper edge of the left end face of the bulb flat steel. Then, adjust the length of the telescopic sleeve rod so that the scale value on the inner rod is equal to the cutting length. That is, at this time, the vertical distance between the outer side of the second positioning plate and the outer side of the first positioning plate is equal to the cutting length. Fix the length of the telescopic sleeve rod with fasteners, and then scribing the line with a stone pencil close to the lower edge of the outer side of the second positioning plate, thereby drawing the cutting positioning line on the upper end face of the bulb flat steel.

[0028] If the upper edge of the left end face of the bulb flat steel is not parallel to the longitudinal section of the bulb flat steel, place the bulb flat steel marking tool on the upper end face of the bulb flat steel and mark the cutting start line on the upper end face of the bulb flat steel along the lower edge of the outer side of the positioning plate. The cutting start line is parallel to the longitudinal section of the bulb flat steel. Then, adjust the length of the telescopic sleeve so that the scale value on the inner rod is equal to the cutting length. That is, at this time, the vertical distance between the outer side of the second positioning plate and the outer side of the first positioning plate is equal to the cutting length. Fix the length of the telescopic sleeve with fasteners, and then use a stone pencil to mark the line with the lower edge of the outer side of the second positioning plate, thereby marking the cutting positioning line on the upper end face of the bulb flat steel.

[0029] As a further preferred technical solution, the positioning and marking method further includes step S3, marking the assembly reference line using a ball flat steel marking tool. The specific steps include: adjusting the length of the telescopic sleeve rod to 150mm and fixing it, aligning the lower edge of the outer side of the positioning plate with the cutting positioning line, and then marking the lower edge of the outer side of the positioning plate with the steel needle tip, thereby marking the assembly reference line on the upper surface of the ball flat steel.

[0030] As a further preferred technical solution, in step S1, the ball flat steel marking tool further includes a support plate for supporting the positioning plate, the support plate being distributed and vertically fixed on the inner side of the positioning plate.

[0031] As a further preferred technical solution, in step S1, after the positioning plate one and positioning plate two are manufactured, and before the positioning plates are fixedly connected by connectors, support plates are respectively installed on the inner side of positioning plate one and the inner side of positioning plate two.

[0032] As described above, the present invention has the following beneficial effects:

[0033] (1) The present invention provides a method for manufacturing and positioning a marking tool for spherical flat steel, which can perform positioning marking on components such as double-headed spherical flat steel that are difficult to mark accurately due to their structural characteristics, effectively improving the marking quality and thus ensuring the accuracy of cutting.

[0034] (2) The present invention provides a method for manufacturing and positioning marking tools for spherical flat steel. It can manufacture marking tools suitable for different specifications of spherical flat steel as needed, and can also be used to manufacture marking tools and positioning marking tools for steel profiles of different shapes, which has high flexibility.

[0035] (3) The present invention provides a method for manufacturing and positioning a spherical flat steel marking tool. By using a screw as the connecting part and designing the screw length as X = L1-2 * L2, the distance between the outer surfaces of the two positioning plates of the assembled marking tool is the distance from the spherical flat steel cutting line to the assembly reference line. This not only improves the marking accuracy, but also allows the assembly reference line to be drawn directly at a distance of 150mm from the cutting end face while marking the cutting positioning line with a steel needle, simplifying the operation steps.

[0036] (4) The manufacturing and positioning marking method of the ball flat steel marking tool of the present invention can save the manual steps of measuring and aligning the positioning points by adopting the telescopic fixed design of the connecting parts using telescopic sleeve rods, thereby improving work efficiency.

[0037] (5) The present invention provides a method for manufacturing and positioning a spherical flat steel marking tool. Through the design of the support plate, the lower end face of the marking tool is made to fit with the upper end face of the spherical flat steel while providing support for the positioning plate, thereby improving the accuracy of the positioning marking. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural schematic diagram of a fixed spherical flat steel marking tool according to Embodiment 1 of the present invention.

[0039] Figure 2 This is a top view of a fixed spherical flat steel marking tool according to Embodiment 1 of the present invention.

[0040] Figure 3 This is a schematic diagram of the positioning and marking of a fixed spherical flat steel marking tool according to Embodiment 1 of the present invention.

[0041] Figure 4 This is a three-dimensional structural schematic diagram of a telescopic spherical flat steel marking tool according to Embodiment 2 of the present invention.

[0042] Figure 5 This is a top view of a telescopic spherical flat steel marking tool according to Embodiment 2 of the present invention.

[0043] Figure 6This is a schematic diagram of the positioning and marking of a telescopic spherical flat steel marking tool according to Embodiment 2 of the present invention.

[0044] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Positioning plate; 11. Positioning plate one; 12. Positioning plate two; 13. Limiting groove; 2. Connecting piece; 21. Screw; 22. Telescopic sleeve rod; 221. Outer rod; 222. Inner rod; 223. Scale; 3. Fastener; 4. Support plate; 5. Ball flat steel; 51. Positioning point one; 52. Positioning point two. Detailed Implementation

[0045] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0046] In the description of this invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of the embodiments of this invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be construed as a limitation of this invention.

[0047] Example 1

[0048] like Figure 1-3 As shown, this embodiment provides a method for manufacturing and positioning a fixed spherical flat steel marking tool, used for positioning marking before cutting the spherical flat steel 5 or for positioning marking before assembling the spherical flat steel 5 with the splicing plate. The method includes the following steps:

[0049] S1. To create a spherical flat steel marking tool with a fixed marking distance:

[0050] The ball flat steel marking tool includes a positioning plate 1 and a connector 2; the positioning plate 1 is provided with a limiting groove 13, the limiting groove 13 having a shape adapted to the longitudinal section curve of the ball flat steel 5; there are two positioning plates 1, the positioning plates 1 include a positioning plate one 11 and a positioning plate two 12 arranged side by side, the limiting grooves 13 on the positioning plate one 11 and the positioning grooves 13 on the positioning plate two 12 are positioned correspondingly and have the same opening direction, the positioning plate one 11 and the positioning plate two 12 are fixedly connected by the connector 2.

[0051] S1-1. Based on the longitudinal section curve of the bulb flat steel 5, a limiting groove 13 is opened on the positioning plate 1:

[0052] In this embodiment, the positioning plate 1 is made of thin steel plate. The cross section of the ball flat steel 5 is attached to the positioning plate 1. The cutting line of the limiting groove 13 is drawn on the positioning plate 1 along the longitudinal section curve of the ball flat steel 5. Then, the cutting process is performed so that the positioning plate 1 obtained by cutting has the limiting groove 13 that matches the surface curve of the ball flat steel 5. The cutting surface and the outer ring are polished smooth.

[0053] Repeat step S1-1 until positioning plate 11 and positioning plate 2 12 with the same shape limiting groove 13 are obtained.

[0054] S1-2. Connect the positioning plate 1 via connector 2 to complete the fabrication of the spherical flat steel marking tool:

[0055] In this embodiment, the connector 2 uses two screws 21; and, in order to ensure that the vertical distance from the outer side of the first positioning plate 11 to the outer side of the second positioning plate 12 is the distance L1 = 150mm from the assembly reference line of the bulb flat steel 5 to the cutting surface of the bulb flat steel when assembling the splicing plate, if the thickness of the first positioning plate 11 and the second positioning plate 12 is L2, then the length X of the connector 2 is X = L1 - 2 * L2.

[0056] First, make a mark at 1 / 3 and 2 / 3 of the positioning plate 11, and at 1 / 3 and 2 / 3 of the positioning plate 12. Then, fix the two ends of the screw 21 vertically to the marked positions on the inner side of the positioning plate 11 and the corresponding marked positions on the inner side of the positioning plate 12, so that the two screws 21 are located at 1 / 3 and 2 / 3 of the inner side of the positioning plate 1, respectively.

[0057] S2. Using a scribing tool for flat steel, mark the cutting positioning lines:

[0058] S2-1. Mark positioning points on the bulb flat steel 5 according to the required cutting length:

[0059] If the upper edge of the left end face of the bulb flat steel 5 is parallel to the longitudinal section of the bulb flat steel 5, then according to the required cutting length of the bulb flat steel 5, take any two points on the upper edge of the left end face of the bulb flat steel 5 for measurement, and use a stone pencil to mark positioning point 1 51 and positioning point 2 52 on the upper end face of the bulb flat steel 5, so that the vertical distance from positioning point 1 51 to the left end face of the bulb flat steel 5 and the vertical distance from positioning point 2 52 to the front end face of the bulb flat steel 5 are both equal to the cutting length.

[0060] If the upper edge of the left end face of the ball flat steel 5 is not parallel to the longitudinal section of the ball flat steel 5, then first place the ball flat steel scribing tool on the upper end face of the ball flat steel 5, and scribing the cutting start line on the upper end face of the ball flat steel 5 along the outer edge of the left side of the scribing tool. The cutting start line is parallel to the longitudinal section of the ball flat steel 5.

[0061] Then, according to the required cutting length of the bulb flat steel 5, take any two points on the cutting start line for measurement, and use a stone pencil to mark positioning point 1 51 and positioning point 2 52 on the upper end face of the bulb flat steel 5, so that the vertical distance from positioning point 1 51 to the cutting start line and the vertical distance from positioning point 2 52 to the cutting start line are both equal to the cutting length.

[0062] S2-2. Place a scribing tool on the upper surface of the ball flat steel 5, so that positioning point 1 51 and positioning point 2 52 fall simultaneously on the lower edge of the outer side of positioning plate 11. Use a stone pencil to scribing along the lower edge of the outer side of positioning plate 11, thereby creating a cutting positioning line on the upper surface of the ball flat steel 5.

[0063] S3. Using a stencil tool, mark the assembly reference lines:

[0064] Since the vertical distance from the outer side of the positioning plate 11 to the outer side of the positioning plate 12 is the distance L1 = 150mm from the assembly reference line to the cutting surface of the ball flat steel 5 when assembling with the splicing plate, the steel needle tip can be pressed against the lower edge of the outer side of the positioning plate 12 to draw the line, thereby drawing the assembly reference line on the upper surface of the ball flat steel 5.

[0065] Example 2

[0066] like Figures 4-6 As shown, this embodiment provides a method for manufacturing and positioning a telescopic scribing tool for spherical flat steel, used for positioning scribing before cutting spherical flat steel 5 or before assembling spherical flat steel 5 with splicing plate. The method includes the following steps:

[0067] S1. To create a spherical flat steel marking tool with an adjustable marking distance:

[0068] The ball flat steel marking tool includes a positioning plate 1, a connector 2, and a fastener 3. The positioning plate 1 is provided with a limiting groove 13, which has a shape adapted to the longitudinal section curve of the ball flat steel 5. There are two positioning plates 1, including a positioning plate one 11 and a positioning plate two 12 arranged side by side. The limiting grooves 13 on the positioning plate one 11 and the positioning grooves 13 on the positioning plate two 12 are positioned correspondingly and have the same opening direction. The positioning plate one 11 and the positioning plate two 12 are movably connected by the connector 2. The connector 2 is equipped with a fastener 3 for tight positioning, so that the positioning plate two 12 can move parallel to the positioning plate one 11 and be fixed, which is beneficial to mark different lengths of cutting positioning lines on the ball flat steel 5 according to the different length requirements of the assembly drawings of the ball flat steel 5.

[0069] In this embodiment, the connector 2 is a telescopic sleeve 22, which includes an inner rod 222 and an outer rod 221. The inner rod 222 is provided with a scale 223. The inner rod 222 moves telescopically within the outer rod 221. The fastener 3 is a fastening bolt, and the telescopic movement of the inner rod 222 is restricted by the fastening bolt.

[0070] The ball flat steel marking tool also includes a support plate 4 for supporting the positioning plate 1. There are two support plates 4, which are respectively vertically fixed on the inner side of the positioning plate 11 and the inner side of the positioning plate 2.

[0071] S1-1. Based on the longitudinal section curve of the bulb flat steel 5, a limiting groove 13 is opened on the positioning plate 1:

[0072] In this embodiment, the positioning plate 1 is made of thin steel plate. The cross section of the ball flat steel 5 is attached to the positioning plate 1. The cutting line of the limiting groove 13 is drawn on the positioning plate 1 along the longitudinal section curve of the ball flat steel 5. Then, the cutting process is performed so that the positioning plate 1 obtained by cutting has the limiting groove 13 that matches the surface curve of the ball flat steel 5. The cutting surface and the outer ring are polished smooth.

[0073] Repeat step S1-1 until positioning plate 11 and positioning plate 2 12 with the same shape limiting groove 13 are obtained.

[0074] S1-2. Install the support plate 4 on the positioning plate 1, and connect the positioning plate 1 through the connector 2 to complete the production of the ball flat steel marking tool:

[0075] In this embodiment, the connector 2 is a telescopic sleeve rod 22; and, in order to ensure that the vertical distance from the outer side of the first positioning plate 11 to the outer side of the second positioning plate 12 is the distance L1 = 150mm from the assembly reference line to the cutting surface of the flat steel 5 when assembling with the splicing plate, if the thickness of the first positioning plate 11 and the second positioning plate 12 is L2, then the maximum length Xmax of the connector 2 is L1 - 2 * L2. This is beneficial to obtain the positioning distance of the assembly reference line after the telescopic sleeve rod 22 is stretched to its limit and fixed, thus reducing the operation steps of adjusting the telescopic length.

[0076] First, make a mark at 1 / 3 and 2 / 3 of the positioning plate 11, and at 1 / 3 and 2 / 3 of the positioning plate 12. Then, vertically fix the support plate 4 to the marked positions on the inner side of the positioning plate 11 and the corresponding marked positions on the inner side of the positioning plate 12, so that the two support plates 4 are located at 1 / 3 and 2 / 3 of the inner side of the positioning plate 1, respectively, and the lower end face of the support plate 4 is flush with the lower end face of the positioning plate 1.

[0077] Then, make a mark at 1 / 2 of the positioning plate 11 and 1 / 2 of the positioning plate 12; fix one end of the outer rod 221 of the telescopic sleeve 22 vertically to the marked position on the inner side of the positioning plate 11, and fix one end of the inner rod 222 of the telescopic sleeve 22 vertically to the marked position on the inner side of the positioning plate 12, so that the positioning plate 12 can move relative to the positioning plate 11 along the axial direction of the telescopic sleeve 22. The scale 223 on the inner rod 222 is the vertical distance between the outer side of the positioning plate 12 and the outer side of the positioning plate 11.

[0078] S2. Using a slab flat steel marking tool, adjust and fix the distance between positioning plate 2 12 and positioning plate 1 11 according to the required cutting length of slab flat steel 5, and mark the cutting positioning line:

[0079] If the upper edge of the left end face of the ball flat steel 5 is parallel to the longitudinal section of the ball flat steel 5, then place the ball flat steel scribing tool on the upper end face of the ball flat steel 5 and align the lower edge of the outer side of the positioning plate 11 with the upper edge of the left end face of the ball flat steel 5.

[0080] Then, adjust the length of the telescopic sleeve rod 22 so that the value of the scale 223 on the inner rod 222 is equal to the cutting length. That is, at this time, the vertical distance between the outer side of the positioning plate 22 and the outer side of the positioning plate 11 is equal to the cutting length. Fix the length of the telescopic sleeve rod 22 with the fastener 3, and then scribble a line with a stone pen close to the lower edge of the outer side of the positioning plate 22, so as to draw a cutting positioning line on the upper surface of the ball flat steel 5.

[0081] If the upper edge of the left end face of the ball flat steel 5 is not parallel to the longitudinal section of the ball flat steel 5, then place the ball flat steel scribing tool on the upper end face of the ball flat steel 5 and scribing the cutting start line on the upper end face of the ball flat steel 5 along the lower edge of the outer side of the positioning plate 11. The cutting start line is parallel to the longitudinal section of the ball flat steel 5.

[0082] Then, adjust the length of the telescopic sleeve rod 22 so that the value of the scale 223 on the inner rod 222 is equal to the cutting length. That is, at this time, the vertical distance between the outer side of the positioning plate 22 and the outer side of the positioning plate 11 is equal to the cutting length. Fix the length of the telescopic sleeve rod 22 with the fastener 3, and then scribble a line with a stone pen close to the lower edge of the outer side of the positioning plate 22, so as to draw a cutting positioning line on the upper surface of the ball flat steel 5.

[0083] S3. Using a stencil tool, mark the assembly reference lines:

[0084] Since the scale 223 on the inner rod 222 is the vertical distance between the outer side of the second positioning plate 12 and the outer side of the first positioning plate 11, and the distance L1 from the assembly reference line to the cutting surface of the bulb flat steel 5 when assembling the splicing plate is 150mm, after marking the cutting positioning line in step S2, the length of the telescopic sleeve 22 is adjusted to be fixed when the scale 223 on the inner rod 222 shows 150mm, the lower edge of the outer side of the first positioning plate 11 is aligned with the cutting positioning line, and then the lower edge of the outer side of the second positioning plate 12 is marked, so that the assembly reference line can be marked on the upper surface of the bulb flat steel 5.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention.

Claims

1. A method for manufacturing and positioning a marking tool for spherical flat steel, characterized in that, Includes the following steps, S1. Make a spherical flat steel marking tool: The ball flat steel marking tool includes a positioning plate (1) and a connector (2); the positioning plate (1) is provided with a limiting groove (13), the limiting groove (13) has a shape adapted to the longitudinal section curve of the ball flat steel (5); the positioning plate (1) includes a positioning plate one (11) and a positioning plate two (12) arranged side by side, the positioning plate one (11) and the positioning plate two (12) are fixedly connected by the connector (2); The connector (2) is a telescopic sleeve (22) and is equipped with a fastener (3) for fastening and positioning. The telescopic sleeve (22) includes an inner rod (222) and an outer rod (221). The inner rod (222) is provided with a scale (223). The inner rod (222) moves telescopically within the outer rod (221). The fastener (3) passes through the outer rod (221) and abuts against the inner rod (222), so that the positioning plate two (12) can move parallel to the positioning plate one (11) and be fixed by the fastener (3). S1-1. Based on the longitudinal section curve of the bulb flat steel (5), a limiting groove (13) is opened on the positioning plate (1) to complete the production of positioning plate one (11) and positioning plate two (12); S1-2. Fix the positioning plate (1) with the connector (2) to complete the production of the ball flat steel marking tool; S2. The specific steps for marking the cutting positioning line using the spherical flat steel marking tool include: adjusting and fixing the distance between the positioning plate two (12) and the positioning plate one (11) according to the required cutting length of the spherical flat steel (5), and marking the cutting positioning line: If the upper edge of the left end face of the ball flat steel (5) is parallel to the longitudinal section of the ball flat steel (5), take the upper edge of the left end face of the ball flat steel (5) as the reference, adjust the position of the scribing tool according to the required cutting length of the ball flat steel (5), and scribing the cutting positioning line on the upper end face of the ball flat steel (5) along the lower edge of the outer side of the positioning plate (1). If the upper edge of the left end face of the bulb flat steel (5) is not parallel to the longitudinal section of the bulb flat steel (5), first place the scribing tool on the upper end face of the bulb flat steel (5) near the left end face to scribing the starting line for cutting. Using the starting line for cutting as a reference, adjust the position of the scribing tool according to the required cutting length of the bulb flat steel (5) and scribing the cutting positioning line on the upper end face of the bulb flat steel (5) along the lower edge of the outer side of the positioning plate (1).

2. The method for manufacturing and positioning a spherical flat steel marking tool according to claim 1, characterized in that, In step S2, the specific steps for marking the cutting positioning lines using a spherical flat steel marking tool include: S2-1. According to the required cutting length of the bulb flat steel (5), mark positioning point one (51) and positioning point two (52) on the bulb flat steel (5); S2-2. Place the ball flat steel scribing tool on the ball flat steel (5) so that positioning point one (51) and positioning point two (52) fall simultaneously on the lower edge of the outer side of positioning plate one (11) and scribing the cutting positioning line along the outer side edge of the ball flat steel (5) that contacts the ball flat steel scribing tool.

3. The method for manufacturing and positioning a spherical flat steel marking tool according to claim 2, characterized in that, The specific steps of step S2-1 include: If the upper edge of the left end face of the bulb flat steel (5) is parallel to the longitudinal section of the bulb flat steel (5), then according to the required cutting length of the bulb flat steel (5), take two points at the upper edge of the left end face of the bulb flat steel (5) for measurement, and use a stone pencil to mark positioning point one (51) and positioning point two (52) on the upper end face of the bulb flat steel (5), so that the vertical distance from positioning point one (51) to the left end face of the bulb flat steel (5) and the vertical distance from positioning point two (52) to the front end face of the bulb flat steel (5) are both equal to the cutting length; If the upper edge of the left end face of the ball flat steel (5) is not parallel to the longitudinal section of the ball flat steel (5), then first place the ball flat steel scribing tool on the upper end face of the ball flat steel (5), and scribing the cutting start line on the upper end face of the ball flat steel (5) along the outer edge of the left side of the scribing tool. The cutting start line is located on the longitudinal section of the ball flat steel (5). Then, according to the required cutting length of the bulb flat steel (5), two points are randomly selected on the cutting start line for measurement, and positioning point one (51) and positioning point two (52) are marked on the upper end face of the bulb flat steel (5) using a stone pencil, so that the vertical distance from positioning point one (51) to the cutting start line and the vertical distance from positioning point two (52) to the cutting start line are both equal to the cutting length.

4. The method for manufacturing and positioning a spherical flat steel marking tool according to claim 1, characterized in that, In step S1, the length X of the connector (2) is L1-2*L2, where L1 is the distance from the assembly reference line to the cutting surface of the bulb flat steel when the bulb flat steel (5) is assembled with the splicing plate, and L2 is the thickness of the positioning plate one (11) and the positioning plate two (12).

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