Curved surface sheet jig frame and lofting method for structure assembly angle

Abstract

The invention discloses a lofting method for a curved surface patch body jig frame and a structure assembly angle, which comprises the following steps of: 1, determining the longitudinal gradient of a jig frame base plane according to a patch body outer plate waterline, and determining the direction of a jig frame upright post; step 2, projecting and sectioning a sheet body outer plate line type along the vertical column direction, and determining a jig frame base plane to obtain a vertical column section line graph; 3, projecting the vertical column section line graph to obtain a sheet body jig frame top view and an outer plate contour projection; and 4, according to the geometrical relationship between the base plane of the jig frame and the longitudinal and transverse structural planes, projecting to obtain an assembly angle. According to the shape and curvature change of the outer plate of the curved surface sheet body, the appropriate jig frame base plane is determined, the overall height of the jig frame is reduced to the minimum, and then the included angle between the structure and the jig frame base plane is lofted according to the spatial position relation between the jig frame base plane and all structural planes.

Description

Technical Field

[0001] The invention belongs to the field of ship curved sheet construction, and in particular relates to a curved sheet frame and a method for laying out a structural assembly angle. Background Art

[0002] The construction of hull segments is a new process method that adapts to modern shipbuilding. This method divides a larger segment into several relatively independent components. The curved surface sheet generally refers to the outer plate of the hull segment with curved lines and the related structures on it. The tire frame is a special process equipment for assembling and welding hull segments or sheets. The tire frame reference plane is used to determine the position of the tire frame working surface. Its cutting generally adopts tangent, single bevel and positive bevel cutting. It is suitable for segments or sheets with little curvature change. The cutting method is simple, and the tire frame is easy to make, mark and install. When the curvature of the sheet changes greatly, the material consumption of the tire frame column and the template is large, the inclination of the internal structure of the sheet is also large, the construction is inconvenient, and it is not suitable for automatic welding, which increases the sheet production cost and reduces production efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method for laying out a curved sheet tire frame and a structural assembly angle, and determines a suitable tire frame base surface according to the shape and curvature changes of the curved sheet body to minimize the overall height of the tire frame.

[0004] The object of the present invention is achieved through the following technical scheme, a method for lofting a curved sheet body frame and a structural assembly angle, comprising the following steps:

[0005] Step 1: Determine the longitudinal inclination of the base surface of the tire frame according to the waterline of the outer plate of the sheet, and determine the direction of the tire frame column;

[0006] Step 2: Project and cut out the outer plate line of the sheet along the column direction, determine the base surface of the tire frame, and obtain the column section line diagram;

[0007] Step 3, projecting the column section line diagram to obtain a top view of the sheet body frame and a projection of the outer plate contour;

[0008] Step 4: According to the geometric relationship between the tire frame base surface and the longitudinal and transverse structural surfaces, the assembly angle is projected.

[0009] Preferably, step 1 at least includes the following steps:

[0010] Step 1.1, in the waterline diagram of the outer plate of the sheet, connect the middle waterline endpoints M and N to obtain the line segment MN, and draw a perpendicular line segment E through the midpoint O of the line segment MN. The line segment E is the projection of the centerline of the sheet body frame;

[0011] Step 1.2, parallel to line segment E, draw the waterline plane of the remaining waterlines in the cross-sectional view of the column;

[0012] Step 1.3: Vertically project the intersection points of line segment E in the waterline drawing of the outer plate of the hull onto the corresponding waterline planes in the column cross-section view, and successively connect the projected vertical points to obtain the section line of the outer plate of the hull for line segment E.

[0013] Step 1.4: Connect the endpoints X and Y of the section line of the outer plate of the hull to obtain line segment XY. The angle between line segment XY and the waterline plane is V degrees.

[0014] Step 1.5: Draw a parallel line segment L to line segment XY, which is the base line of the hull jig.

[0015] Step 1.6: Draw a perpendicular line to line segment L through the intersection point of the waterline plane of the middle waterline and the above-mentioned section line of the outer plate of the hull. The length of the perpendicular line is H3. On both sides of the perpendicular line parallel to H3, draw line segments with lengths of H2 and H4 respectively. H2 and H4 are the distances from the above-mentioned section line to line segment L. Draw perpendicular lines to line segment L through the intersection points of the upper and lower longitudinal joint indentation lines and the above-mentioned section line to obtain H1 and H5. H1, H2, H3, H4, and H5 are the height values of the jig supports at this location.

[0016] Step 1.7: Draw a parallel line segment E to line segment L, and extend H1, H2, H3, H4, and H5 in the column cross-section view perpendicular to line segment E to obtain the top view of the hull jig. H1, H2, H3, H4, and H5 are the jig supports at this location.

[0017] Preferably, in Step 1.2, the height spacing of the waterline planes is 500 mm.

[0018] Preferably, in Step 1.5, the minimum distance from line segment L to the section line is greater than or equal to 800 mm.

[0019] Preferably, in Step 2:

[0020] In the waterline drawing, draw parallel line segments A, B, C, D, F, G, H, and J to line segment E, which are the corresponding section lines of the outer plate of the hull, and draw the section lines of the outer plate of the hull for the head and tail end seams and their 50-mm indentations.

[0021] Preferably, in Step 3:

[0022] In the top view of the jig, draw parallel line segments A, B, C, D, F, G, H, and J to line segment E, and vertically project H1, H2, H3, H4, and H5 of each section line of the outer plate of the hull onto the corresponding line segments A, B, C, D, F, G, H, and J. The head and tail end seams and their indentations, as well as the upper and lower longitudinal joints, are all projected in the top view of the jig to complete the data lofting of the hull jig.

[0023] Preferably, Step 4 includes at least the following steps:

[0024] Step 4.1, draw a schematic diagram of the relationship between the horizontal and vertical structures on the waterline diagram, with the horizontal structure perpendicular to the vertical structure, and projected as a straight line on the diagram; draw section line projections at heights H11500 and H11000 on the tire frame base surface to obtain line segments AE and BF, and line segments AE and BF are parallel to the midline segment MN; draw line segment ST perpendicular to line segments AE and BF, and cut and project along line segment ST to obtain the angle V between the horizontal structure and the tire frame base surface;

[0025] Step 4.2, in the waterline diagram, cut and project along line segment AB to obtain the angle line segment A1B1 between the transverse structure and the tire frame base surface. Point B intersects line segment AE at point C during projection, and the length of line segment BC is L1; correspond the point in the transverse structure angle diagram corresponding to point C to obtain point C1 on H11500, draw a perpendicular line segment C1M through point C1 to line segment A1B1, and then draw a perpendicular line segment C1D through point C1 to line segment C1M, so that the length of line segment C1D is equal to L1, connect points D and M, and the angle R between line segment C1M and line segment DM is the angle between the transverse structure and the tire frame base surface;

[0026] Step 4.3, in the waterline diagram, cut and project along the line segment EF to obtain the angle line segment E1F1 between the longitudinal structure and the tire frame base surface. Point F intersects line segment AE at point G during projection, and the length of line segment FG is L2; ​​correspond the points in the longitudinal structure angle diagram corresponding to point G to obtain point G1 on H11500, draw a perpendicular line segment G1N through point G1 to line segment E1F1, and then draw a perpendicular line segment G1K through point G1 to line segment G1N, so that the length of line segment G1K is equal to L2, connect points K and N, and the angle Q between line segment G1N and line segment KN is the angle between the longitudinal structure and the tire frame base surface.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The present invention provides a method for laying out the angle of a curved sheet body frame and structure assembly. According to the shape and curvature change of the outer plate of the curved sheet body, a suitable frame base is determined to minimize the overall height of the frame, and then the angle between the structure and the frame base is laid out according to the spatial position relationship between the frame base and each structural surface. The present invention can cut the most suitable frame inclination according to the specific sheet body shape, has good construction conditions, can expand the working surface of automatic welding and semi-automatic welding, improve welding quality, save frame materials and production time. The present invention can also accurately lay out the angle between the internal structure and the frame base, facilitate assembly, and improve the accuracy and efficiency of sheet body production.

[0029] The method of the invention is simple, easy to operate, has good versatility and high reliability, and is applicable to various curved surface sheets with large curvature changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a lofting diagram of the base surface of the sheet tire frame in the embodiment of the present invention;

[0031] Figure 2 It is a section line layout diagram of the sheet body frame column in the embodiment of the present invention;

[0032] Figure 3 It is a top view of the sheet body frame in the embodiment of the present invention (vertical to the frame base);

[0033] Figure 4 It is a lofting diagram of the angles between the longitudinal structure and the transverse structure of the sheet body and the base surface of the tire frame in the embodiment of the present invention;

[0034] Figure 5 The present invention is a flow chart of a method for laying out a curved sheet body frame and a structural assembly angle. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] like Figure 5 As shown, the technical solution of the present invention provides a method for lofting a curved sheet body frame and a structural assembly angle, comprising the following steps:

[0037] Step 1: Determine the longitudinal inclination of the base surface of the tire frame according to the waterline of the outer plate of the sheet, and determine the direction of the tire frame column;

[0038] Step 2: Project and cut out the outer plate line of the sheet along the column direction, determine the base surface of the tire frame, and obtain the column section line diagram;

[0039] Step 3, projecting the column section line diagram to obtain a top view of the sheet body frame and a projection of the outer plate contour;

[0040] Step 4: According to the geometric relationship between the tire frame base surface and the longitudinal and transverse structural surfaces, the assembly angle is projected.

[0041] In the embodiment of the present invention, the spacing between the sheet body frame pillars is generally 1000mm, and pillars should be set 50mm indented from the edge of the sheet body outer plate. The minimum height of the frame pillars is generally 800mm.

[0042] like Figure 1 As shown, in one embodiment of the present invention, a method for step 1 is provided, and the method specifically comprises the following steps:

[0043] Step 1.1, in ( Figure 1-1 ) In the waterline diagram of the outer plate of the sheet, connect the endpoints M and N of the middle waterline WL1100 to obtain the line segment MN. Through the midpoint O of the line segment MN, draw a perpendicular line segment E to MN. The line segment E is the projection of the center line of the sheet frame.

[0044] Step 1.2. Parallel line segment E. In the ([ Figure 1-2 ) column sectional view, draw waterlines WL9000, WL9500, WL10000, WL10500, WL11000, WL11500, WL12000, WL12500, with a height spacing of 500 mm between waterlines.

[0045] Step 1.3. Vertically project the intersection points of line segment E with each waterline in the waterline drawing of the ([ Figure 1-1 ) outer plate of the sheet to the corresponding waterlines in the ([ Figure 1-2 ) column sectional view, and successively connect the vertical projection points to obtain the sectional line of the outer plate of the sheet for line segment E.

[0046] Figure 1-1 This is the waterline drawing of the outer plate of the sheet. The outer plate of the sheet has significant bending both longitudinally (in the ship length direction) and transversely (in the ship width direction). The selection of the base surface of the jig should be approximately parallel to the curved surface of the outer plate of the sheet.

[0047] Step 1.4. Connect the endpoints X and Y of the sectional line of the outer plate of the sheet to obtain line segment XY. The angle between line segment XY and the waterline is V degrees.

[0048] Step 1.5. Draw a parallel line segment L to line segment XY such that the minimum distance from line segment L to the above sectional line is not less than 800 mm. Line segment L is the base line of the jig for the sheet.

[0049] Step 1.6. Through the intersection point of the WL11000 waterline and the above sectional line of the outer plate of the sheet, draw a perpendicular line to line segment L, with the perpendicular line length H3; on both sides of the perpendicular line parallel to H3, draw line segments with a spacing of 1000 mm and lengths of H2 and H4 respectively. H2 and H4 are the distances from the above sectional line to line segment L. Similarly, through the intersection points of the longitudinal seams at the upper and lower openings indented by 50 mm and the above sectional line, draw perpendicular lines to line segment L to obtain H1 and H5. H1, H2, H3, H4, and H5 are the height values of the jig supports at this location.

[0050] Step 1.7. As shown in the ([ Figure 1-3 ) top view of the jig, draw a parallel line segment E to line segment L and extend the ([ Figure 1-2 ) H1, H2, H3, H4, H5 in the column sectional view perpendicular to line segment E to obtain the top view of the jig for the sheet. H1, H2, H3, H4, and H5 are the jig supports at this location.

[0051] As Figure 2 shown, in an embodiment of the present invention, step 2 specifically includes the following steps: As Figure 2-1 in the waterline drawing, draw parallel line segments A, B, C, D, F, G, H, J to line segment E in the waterline drawing, with a spacing of 1000 mm; as Figure 2-2For the column cross-section, draw the corresponding section lines A, B, C, D, F, G, H, and J of the outer plate of the sheet, as well as the section lines of the leading and trailing end seams and the outer plate of the sheet with an indent of 50 mm.

[0052] like Figure 3 As shown, in one embodiment of the present invention, step 3 specifically includes the following steps:

[0053] As shown in the figure ( Figure 3-2 In the top view of the tire frame, draw parallel line segments A, B, C, D, F, G, H, J of line segment E with a spacing of 1000 mm, and ( Figure 3-1 The cross-section lines H1, H2, H3, H4, and H5 of the outer panels of each sheet in the column cross-section diagram are vertically projected to the corresponding ( Figure 3-2 The line segments A, B, C, D, F, G, H, and J, the head and tail end seams and their indentations, the upper and lower longitudinal seams, etc. are projected on the top view of the tire frame to complete the data layout of the sheet tire frame.

[0054] like Figure 4 As shown, in one embodiment of the present invention, step 4 specifically includes the following steps:

[0055] Step 4.1 Figure 4-1 It is the relationship between the horizontal and vertical structures on the waterline diagram. The horizontal structure is perpendicular to the vertical structure and is projected as a straight line on the diagram. Line segments AE and BF are the projections of the section lines at heights H11500 and H11000 on the tire frame base. Line segments AE and BF are parallel ( Figure 1-1 The line segment MN in the waterline diagram. The line segment ST is perpendicular to the line segments AE and BF. The section projection along the line segment ST is obtained ( Figure 4-2 Horizontal structure angle diagram) The angle V between the horizontal structure and the tire frame base.

[0056] Step 4.2, in ( Figure 4-1 In the waterline diagram, the section projection along line segment AB is as follows ( Figure 4-3 Transverse structure angle diagram) The angle line segment A1B1 between the transverse structure and the tire frame base surface, point B intersects line segment AE at point C when projected, and the length of line segment BC is L1; point C corresponds to the projection ( Figure 4-3 Get point C1 on H11500 in the transverse structure angle diagram, draw line segment A1B1 through point C1 and perpendicular line segment C1M, then draw line segment C1D through point C1 and make the length of line segment C1D equal to L1, connect points D and M, the angle R between line segment C1M and line segment DM is the angle between the transverse structure and the tire frame base surface.

[0057] Step 4.3, in ( Figure 4-1 ), the section projection along line segment EF is as follows ( Figure 4-4Vertical structure included angle diagram) The included angle line segment E1F1 between the vertical structure and the base surface of the jig, point F intersects line segment AE at point G during projection, and the length of line segment FG is L2; the point G corresponding to the projection is ([ Figure 4-4 ) to obtain point G1 on H11500 in (). Draw a perpendicular line segment G1N from point G1 to line segment E1F1, and then draw a perpendicular line segment G1K from point G1 to line segment G1N, so that the length of line segment G1K is equal to L2. Connect points K and N, and the included angle Q between line segment G1N and line segment KN is the included angle between the vertical structure and the base surface of the jig.

[0058] The above is the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art of the present technology, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A method for laying out a curved sheet body frame and a structural assembly angle, characterized in that: The method comprises the following steps: Step 1: Determine the longitudinal inclination of the base surface of the tire frame according to the waterline of the outer plate of the sheet, and determine the direction of the tire frame column; Step 2: Project and cut out the outer plate line of the sheet along the column direction, determine the base surface of the tire frame, and obtain the column section line diagram; Step 3, projecting the column section line diagram to obtain a top view of the sheet body frame and a projection of the outer plate contour; Step 4: According to the geometric relationship between the tire frame base surface and the longitudinal and transverse structural surfaces, the assembly angle is projected.

2. A method for laying out a curved sheet body frame and structure assembly angle according to claim 1, characterized in that: The step 1 at least comprises the following steps: Step 1.1, in the waterline diagram of the outer plate of the sheet, connect the middle waterline endpoints M and N to obtain the line segment MN, and draw a perpendicular line segment E through the midpoint O of the line segment MN. The line segment E is the projection of the centerline of the sheet body frame; Step 1.2, parallel to line segment E, draw the waterline plane of the remaining waterline in the column section view; Step 1.3, vertically project the intersection of line segment E and each waterline in the waterline diagram of the sheet outer plate onto the corresponding waterline surface in the column section view, and connect each projection vertical point in sequence to obtain the sheet outer plate section line of line segment E; Step 1.4, connect the end points X and Y of the section line of the outer plate of the sheet to obtain a line segment XY, and the angle between the line segment XY and the water plane is V degrees; Step 1.5, draw a line segment L parallel to line segment XY, which is the base line of the sheet frame; Step 1.6, draw a perpendicular line of line segment L through the intersection of the waterline plane of the middle waterline and the section line of the outer plate of the sheet, and the length of the perpendicular line is H3; draw line segments of length H2 and H4 on both sides of the perpendicular line H3, and H2 and H4 are the distances from the section line to the line segment L; draw perpendicular lines of line segment L through the intersection of the upper and lower longitudinal seam indentation lines and the section line, respectively, and obtain H1 and H5; H1, H2, H3, H4, H5 are the height values ​​of the tire frame support at this location; Step 1.7, draw a line segment E parallel to line segment L, and extend H1, H2, H3, H4, H5 in the column cross-section view perpendicular to line segment E to obtain a top view of the sheet tire frame, where H1, H2, H3, H4, H5 are the tire frame pillars.

3. A method for laying out a curved sheet body frame and structure assembly angle according to claim 2, characterized in that: In step 1.2, the height spacing of the waterline surfaces is 500 mm.

4. A method for laying out a curved sheet body frame and structure assembly angle according to claim 3, characterized in that: In the step 1.5, the minimum distance from the line segment L to the section line is greater than or equal to 800 mm.

5. A method for laying out a curved sheet body frame and structure assembly angle according to claim 1, characterized in that: In step 2: In the waterline diagram, draw line segments A, B, C, D, F, G, H, and J parallel to line segment E, which are the corresponding section lines of the outer plate of the sheet, and draw the leading and trailing end seams and the section lines of the outer plate of the sheet with an indent of 50 mm.

6. A method for laying out a curved sheet body frame and structure assembly angle according to claim 1, characterized in that: In step 3: Draw line segments A, B, C, D, F, G, H, J parallel to line segment E in the top view of the tire frame, and vertically project H1, H2, H3, H4, H5 of the section lines of the outer plates of each piece onto the corresponding line segments A, B, C, D, F, G, H, J. The head and tail end seams and their indentations, and the upper and lower longitudinal seams are all projected onto the top view of the tire frame to complete the data layout of the piece body tire frame.

7. A method for laying out a curved sheet body frame and structure assembly angle according to claim 1, characterized in that: The step 4 at least comprises the following steps: Step 4.1, draw a schematic diagram of the relationship between the horizontal and vertical structures on the waterline diagram, with the horizontal structure perpendicular to the vertical structure, and projected as a straight line on the diagram; draw section line projections at heights H11500 and H11000 on the tire frame base surface to obtain line segments AE and BF, and line segments AE and BF are parallel to the midline segment MN; draw line segment ST perpendicular to line segments AE and BF, and cut and project along line segment ST to obtain the angle V between the horizontal structure and the tire frame base surface; Step 4.2, in the waterline diagram, cut and project along line segment AB to obtain the angle line segment A1B1 between the transverse structure and the tire frame base surface. Point B intersects line segment AE at point C during projection, and the length of line segment BC is L1; correspond the point in the transverse structure angle diagram corresponding to point C to obtain point C1 on H11500, draw a perpendicular line segment C1M through point C1 to line segment A1B1, and then draw a perpendicular line segment C1D through point C1 to line segment C1M, so that the length of line segment C1D is equal to L1, connect points D and M, and the angle R between line segment C1M and line segment DM is the angle between the transverse structure and the tire frame base surface; Step 4.3, in the waterline diagram, cut and project along the line segment EF to obtain the angle line segment E1F1 between the longitudinal structure and the tire frame base surface. Point F intersects line segment AE at point G during projection, and the length of line segment FG is L2; ​​correspond the points in the longitudinal structure angle diagram corresponding to point G to obtain point G1 on H11500, draw a perpendicular line segment G1N through point G1 to line segment E1F1, and then draw a perpendicular line segment G1K through point G1 to line segment G1N, so that the length of line segment G1K is equal to L2, connect points K and N, and the angle Q between line segment G1N and line segment KN is the angle between the longitudinal structure and the tire frame base surface.

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