CN113879479B - Design lofting method of double-inclined jig frame - Google Patents
Design lofting method of double-inclined jig frame Download PDFInfo
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- CN113879479B CN113879479B CN202111280713.4A CN202111280713A CN113879479B CN 113879479 B CN113879479 B CN 113879479B CN 202111280713 A CN202111280713 A CN 202111280713A CN 113879479 B CN113879479 B CN 113879479B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000010586 diagram Methods 0.000 claims abstract description 38
- 230000011218 segmentation Effects 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 9
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/10—Building or assembling vessels from prefabricated hull blocks, i.e. complete hull cross-sections
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to the technical field of ship manufacturing, and discloses a design lofting method of a double-inclined jig, which comprises the following steps: 1. obtaining a water line diagram according to the rib type diagram; 2. making a perpendicular bisector and an offset line on the water line diagram; 3. defining a jig base plane, obtaining jig data, and making a cross section of a perpendicular bisector and a deviation line thereof; 4. and obtaining rib plate installation angles and rib line scribing data according to the actual length of each line of the water line diagram, the sectional view and the rib line diagram. The design lofting method of the double-inclined jig frame obtains a proper jig frame basal plane again through conversion of the projection plane, obtains various positioning and scribing data and assembly angle samples, can effectively ensure the segmentation accuracy, is beneficial to positioning and scribing on site, and improves the working efficiency.
Description
Technical Field
The invention relates to the technical field of ship manufacturing, in particular to a design lofting method of a double-inclined jig frame.
Background
The special moulding bed is an important special technological equipment in the process of hull section assembly, is used as a section external mould when the hull is manufactured, and has the functions of ensuring that the surface line type of the moulding bed is matched with the outer surface of the section, ensuring that the assembly and welding work of the section have good conditions, ensuring that certain special moulding bed also has the function of keeping the accurate shape of the section, and ensuring that the moulding bed has high requirements on the hull section, adopting the reverse deformation measure of the moulding bed, controlling the deformation of the section to be in the construction precision range, and providing the pattern and the data required by the field manufacturing of the moulding bed through the moulding bed layout, wherein the pattern comprises a section moulding bed diagram and a transverse section moulding bed layout, and the data mainly comprises column height values, longitudinal seam scribing data, structural line scribing data and the like.
Most of jig lofting can be realized through ship production design software, relevant parameters of the jig can be defined, graphics and data required for manufacturing the jig on site can be generated, the sections near the head of the ship body are large in transverse inclination of rib lines and large in longitudinal level difference, and for the sections, even if the cross section is designed into a double-inclined jig, the condition that a cross line cannot penetrate through the whole outer plate (as shown in a figure I) can occur, so that great difficulty is brought to positioning and scribing of the on-site outer plate, and positioning and scribing accuracy is also influenced.
Disclosure of Invention
The purpose of the invention is that: the design lofting method of the double-inclined jig frame is characterized in that after the projection surface is converted, a jig frame base surface is re-established, and finally, the purpose that a cross wire can penetrate through the whole outer plate is achieved, so that the working efficiency of manufacturing the on-site jig frame is improved.
In order to solve the technical problems, the invention provides a design lofting method of a double-inclined jig frame.
A design lofting method of a double-inclined jig frame comprises the following steps:
1. according to the rib type line drawing, a water line drawing is obtained from the rib type line drawing, and in the segmentation near the head, the upper and lower mouth slits are generally horizontal, so that in the water line drawing, the upper and lower mouths and the waterline are solid;
2. a middle waterline is selected from the waterline plane, a straight line is formed by connecting head and tail end points, the middle vertical line of the straight line is formed, the longitudinal spacing of the jig frame is respectively shifted to the head and tail by taking the middle vertical line as a reference, a plurality of offset lines of the middle vertical line are obtained, and a head and tail end retraction straight line is formed at the position of the head and tail end from an end seam;
3. defining a jig base plane, obtaining jig data, making a cross section of a perpendicular bisector and an offset line thereof, and projecting a head-tail port slit and a head-tail end retracting straight line to the cross section; connecting two ends of a corresponding middle waterline with straight lines in the cross section, and making parallel lines, wherein the base surface of the jig frame is the parallel line after the plate thickness of the outer plate is subtracted from the lowest point of the straight line corresponding to the middle waterline; the method comprises the steps of (1) taking a base plane parallel line of a jig frame in a vertical sectional view, wherein the distance between the base plane parallel lines is equal to the distance between a perpendicular bisector in a water line diagram and an offset line of the perpendicular bisector, projecting each point of an upper opening seam and a lower opening seam to a corresponding position in a jig frame plan view to obtain four corner points, taking a perpendicular line perpendicular to a corresponding parallel line in the jig frame plan view in the sectional view, taking the vertical distance from the four corner points in the water line diagram to the offset line of the corresponding perpendicular bisector, making the vertical distance from the corner points in the water line diagram to the offset line of the corresponding perpendicular line equal to the vertical distance from the corner points in the jig frame plan view, and projecting a head end and a tail end retraction straight line to the jig frame plan view to prepare the jig frame plan view; in the plan view of the jig frame, vertical bisectors are formed at the positions of parallel lines in the middle, and the two lines are laser cross lines of the jig frame.
4. And obtaining rib plate installation angles and rib line scribing data according to the actual length of each line of the water line diagram, the sectional view and the rib line diagram.
The design lofting method of the double-inclined jig further comprises the steps of taking an intersection point of a jig base plane and any two waterlines in a cross section to project the intersection point of the water line diagram and the rib line at two points, shifting the rib line at any height to intersect the two diagonal lines at two points, expanding the plane where the rib line is located in an expanded view, projecting four points onto parallel lines with intervals, enabling the two line segments to be of substantial length, taking one point of one line segment as a perpendicular line of the other line segment to intersect the intersection point in the expanded view, shifting the perpendicular line segment by the same height according to the height of the rib line shift, and connecting the diagonal lines to form an angle which is the angle between the rib and the jig base plane.
In the first step, the water line spacing is 480 to 550mm.
In the second step, the middle waterline is 11500mm waterline, the perpendicular bisectors are respectively shifted to the head and the tail by a longitudinal spacing of 1000mm, and the head and the tail end retraction straight line is positioned at a position 50-100 mm from the head and the tail end to the end seam.
In the third step, the distance between the parallel lines on the base surface and the distance between the perpendicular bisectors and the offset lines in the water line diagram are all 1000mm.
Compared with the prior art, the design lofting method of the double-inclined jig frame has the beneficial effects that: through the conversion of the projection surface, a proper jig base surface is obtained again, various positioning scribing data and assembly angle samples are obtained, the segmentation accuracy can be effectively ensured, the on-site positioning scribing is facilitated, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic view of a prior art double chamfer jig;
FIG. 2 is a water line diagram of an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the direction A of FIG. 2 in accordance with an embodiment of the present invention;
FIG. 4 is a plan view of the jig frame in the B direction of FIG. 3 according to the embodiment of the invention;
fig. 5 is an expanded view of the rib line diagram of fig. 2 in accordance with an embodiment of the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "mounted," "connected," and "connected" are to be construed broadly in this application, and may be either fixedly connected, detachably connected, or integrally connected, for example, unless otherwise explicitly stated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be further understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the machine or element in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 2-4, a design lofting method of a dual-bias jig according to a preferred embodiment of the invention includes the steps of:
1. according to the characteristic of the molded line, the double-chamfer jig frame is manufactured on the rib type line drawing, as shown in figure 2, so that the rib type line drawing is used for obtaining the water line drawing, the water line spacing is about 500mm to ensure the precision, and in the segmentation near the head, the upper and lower mouth seams are generally horizontal, so that in the water line drawing, the upper and lower mouths and the water line are solid;
2. a perpendicular bisector and an offset line are formed in a water line diagram, an intermediate water line (11500 mm water line in the figure) is selected in the water line plane of the figure II, a straight line is formed by connecting the head end point and the tail end point, the perpendicular bisector (straight line 4 in the figure) of the straight line is formed, the perpendicular bisectors (straight line 4) are used as references to offset a longitudinal spacing (1000 mm in the figure) of the jig frame towards the head end and the tail, offset lines (straight lines 1-8) of a plurality of perpendicular bisectors are obtained, and a head end and tail end retracting straight line is formed at a position of 50-100 mm away from an end seam at the head end and the tail end;
3. defining a jig base plane, obtaining jig data, making a cross section of a perpendicular bisector and a deviation line (straight lines 1-8) of the perpendicular bisector, (see figure III), and projecting a head-tail port seam and a head-tail end retracting straight line with a port retracting by 50mm to the cross section of figure III, wherein in figure III, the straight lines 1-8 are solid, and the lines of the head-tail port seam and the head-tail end retracting straight line with the port retracting by 50-100 mm are projected; in the three-section view of the figure, two ends of a corresponding middle waterline are connected by a straight line (straight line 17), parallel lines of the straight line are made, the minimum point of the straight line (straight line 17) corresponding to the middle waterline and the parallel line minus the plate thickness of the outer plate is 800mm, and the parallel lines are the base surface of the jig frame; the method comprises the steps of (1) making basal plane parallel lines 9-16 on a jig basal plane in a vertical drawing three-section view, wherein the distance between the basal plane parallel lines is equal to the distance between a perpendicular line in a water line diagram of a drawing two and a parallel line (straight lines 1-8) of the basal plane parallel lines (both are 1000 mm), projecting each point of an upper port seam and a lower port seam to a corresponding position in a jig plane diagram of a drawing four to obtain four corner points, making the perpendicular lines perpendicular to corresponding parallel lines in the jig plane diagram of a drawing 4 on a section view of the drawing three, then taking the perpendicular distance between the four corner points in the water line diagram of the drawing two and the perpendicular distance between the corner points and the corresponding basal plane parallel lines in the jig plane diagram of the drawing four as an example, making the perpendicular lines perpendicular to the parallel lines 16 in the jig plane diagram on the section view on the upper port tail end point and the straight line 8 on the water line diagram, making the perpendicular distance between the upper port tail end point and the line 16 in the jig plane diagram of the drawing four, and making the perpendicular lines of the head end tail end 50-100 mm and tail end of the tail of the jig to the four to the parallel lines in the jig plane diagram of the drawing four; in the jig frame plan view in the fourth drawing, a perpendicular bisector is made at the position of a parallel line (straight line 12) in the middle corresponding to a straight line (straight line 17) corresponding to a middle waterline, the two lines are laser cross lines of the jig frame, the intersection points of the two lines are origins, then X and Y values in the jig frame plan view are solid, the X and Y values can be measured directly, and the Z value can be measured in the third drawing, so that the height of each jig frame support column and the positioning values of four corner points can be obtained according to the design requirement of the jig frame spacing.
4. In the water line diagram of the second drawing, the upper opening, the lower opening and the waterline are solid, the straight line 4 is one of the cross lines, in the cross section of the third drawing, each section line is solid, in the rib line diagram, the rib line is solid, and the rib plate installation angle and rib line scribing data are obtained according to the solid length of each line in the three surfaces of the water line diagram, the cross section and the rib line diagram. The method is mainly aimed at some linear relatively inclined sections near the head, and a proper jig reference plane is reestablished by changing the projection plane in the water plane, so that various scribing positioning data and assembly angles are obtained, the precision of the sections can be effectively ensured, the on-site positioning scribing is facilitated, and the working efficiency is improved.
Referring to fig. 2-5, the exemplary design lofting method of the double-inclined jig further includes a step five of taking an intersection point (11500 mm and 12000mm water lines) of a jig base plane and any two water lines in a cross section of the drawing three, projecting the intersection point (a, b) of a water line diagram (drawing two) and a rib line (F201.5), shifting the rib line (F201.5) by any one height (500 mm in the drawing) and intersecting the two oblique lines at two points C, d, in an expanded drawing of the drawing five, the rib line F201.5 is actually a plane with a height of 1000mm, so that the plane with the rib line is expanded, a, b, C, d, and four points are projected on parallel lines with a distance of 1000mm, the two line segments AB, CD are all real lengths, taking a point C of one line segment as an intersection point O of the other line segment AB, shifting the vertical line segment CO by the same height 500mm according to the height of the rib line shift, and connecting the angle (23 degrees) of the rib line frame is also provided with the base plane angle, and the jig base plane is also provided with the base plane angle, and the jig is assembled by the method.
Referring to fig. 2-4, in an exemplary first step, the waterline spacing is 480 to 550mm.
Referring to fig. 2-4, in the second step, the middle waterline is 11500mm waterline, the perpendicular bisectors are respectively shifted from head to tail by a longitudinal spacing of 1000mm, and the head-tail retraction straight line is located at a position 50-100 mm from the head-tail end to the end seam.
Referring to fig. 2-4, in the third step, the distance between the base parallel lines and the perpendicular bisector and the offset line thereof in the water line diagram are 1000mm.
In summary, the present embodiment provides a design lofting method of a double-inclined jig, which obtains a proper jig base plane again through conversion of a projection plane, obtains various positioning and scribing data and assembly angle samples, can ensure segmentation precision, is favorable for positioning and scribing on site, is favorable for positioning an outer plate, improves assembly precision, and improves working efficiency.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (4)
1. The design lofting method of the double-inclined jig frame is characterized by comprising the following steps of:
1. according to the rib type line drawing, a water line drawing is obtained from the rib type line drawing, and in the segmentation near the head, the upper and lower mouth slits are generally horizontal, so that in the water line drawing, the upper and lower mouths and the waterline are solid;
2. a middle waterline is selected from the waterline plane, a straight line is formed by connecting head and tail end points, the middle vertical line of the straight line is formed, the longitudinal spacing of the jig frame is respectively shifted to the head and tail by taking the middle vertical line as a reference, a plurality of offset lines of the middle vertical line are obtained, and a head and tail end retraction straight line is formed at the position of the head and tail end from an end seam;
3. defining a jig base plane, obtaining jig data, making a cross section of a perpendicular bisector and an offset line thereof, and projecting a head-tail port slit and a head-tail end retracting straight line to the cross section; connecting two ends of a corresponding middle waterline with straight lines in the cross section, and making parallel lines, wherein the base surface of the jig frame is the parallel line after the plate thickness of the outer plate is subtracted from the lowest point of the straight line corresponding to the middle waterline; the method comprises the steps of (1) taking a base plane parallel line of a jig frame in a vertical sectional view, wherein the distance between the base plane parallel lines is equal to the distance between a perpendicular bisector in a water line diagram and an offset line of the perpendicular bisector, projecting each point of an upper opening seam and a lower opening seam to a corresponding position in a jig frame plan view to obtain four corner points, taking a perpendicular line perpendicular to a corresponding parallel line in the jig frame plan view in the sectional view, taking the vertical distance from the four corner points in the water line diagram to the offset line of the corresponding perpendicular bisector, making the vertical distance from the corner points in the water line diagram to the offset line of the corresponding perpendicular line equal to the vertical distance from the corner points in the jig frame plan view, and projecting a head end and a tail end retraction straight line to the jig frame plan view to prepare the jig frame plan view; in a jig frame plan view, making a vertical bisector at the position of a parallel line in the middle, wherein the two lines are laser cross lines of the jig frame, taking the intersection point of the two lines as an origin, measuring X and Y values in the jig frame plan view, measuring Z values in a cross section, and obtaining the height of each jig frame support and the positioning values of four corner points according to the design requirement of the jig frame spacing;
4. obtaining rib plate installation angles and rib line scribing data according to the actual length of each line of the water line diagram, the sectional view and the rib line diagram;
and fifthly, taking an intersection point of the base surface of the jig frame and any two waterlines in the cross section, projecting the intersection point to the two points of the water line diagram and the rib line, shifting the rib line by any one height, intersecting the two oblique lines at the two points, expanding the surface of the rib line in the expanded view, projecting four points to a parallel line with a space, enabling the two line segments to be solid, taking one point of one line segment as a perpendicular line of the other line segment to intersect at the intersection point in the expanded view, shifting the perpendicular line segment by the same height according to the shifting height of the rib line, and connecting the diagonal lines, wherein the formed angle is the angle of the rib and the base surface of the jig frame.
2. A method of designing and lofting a double-bias jig according to claim 1, wherein: in the first step, the waterline distance is 480 to 550mm.
3. A method of designing and lofting a double-bias jig according to claim 1, wherein: in the second step, the middle waterline is 11500mm waterline, the perpendicular bisectors are respectively offset to the head and the tail by 1000mm in longitudinal distance, and the position of the head and the tail end of the retracting straight line from the head and the tail end to the end seam is 50-100 mm.
4. A method of designing and lofting a double-bias jig according to claim 1, wherein: in the third step, the distance between the base plane parallel lines and the distance between the perpendicular bisectors and the offset lines in the water line diagram are 1000mm.
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| CN202111280713.4A CN113879479B (en) | 2021-10-29 | 2021-10-29 | Design lofting method of double-inclined jig frame |
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| CN202111280713.4A CN113879479B (en) | 2021-10-29 | 2021-10-29 | Design lofting method of double-inclined jig frame |
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| CN113879479B true CN113879479B (en) | 2023-12-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114771767B (en) * | 2022-05-26 | 2023-06-23 | 中船黄埔文冲船舶有限公司 | Design lofting method of jig frame template |
| CN115009469B (en) * | 2022-06-30 | 2023-06-23 | 中船黄埔文冲船舶有限公司 | Lofting design method for processing template |
| CN114987717A (en) * | 2022-07-05 | 2022-09-02 | 广州黄船海洋工程有限公司 | Positioning and mounting method for curved surface structure |
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